One. Brief introduction to the structure:
cwns3.The 5-85 60-Q type gas-fired atmospheric pressure hot water boiler is a horizontal center-fired three-way fire-tube boiler. Adopt the center back.
The high-temperature flue gas is from the center of the furnace to the rear end of the furnace, and then closes to the wall of the furnace to enter the front smoke chamber.
It passes through the smoke pipe to the rear smoke chamber and is discharged into the atmosphere through the chimney. The boiler enters the front smoke chamber through the rear smoke chamber, which makes the boiler overhaul extremely convenient.
The boiler is equipped with an industrial burner with good technical performance, and adopts automatic proportional adjustment of combustion, program start and stop, and fully automatic operation.
and other advanced technologies, and has automatic protection functions such as automatic temperature control and flameout. This type of boiler has a compact structure and is safe.
Reliable, easy to operate, quick to install, less pollution, low noise, high efficiency and so on.
Two. Brief description of the product leaving the factory:
The boiler is fully assembled. Burner, automatic console, water pump, valve, instrument, flue duct pipe, etc., according to the drawing.
The paper is shipped out of the factory or according to the contract. Provide two copies of random technical documents according to the list of factory technical documents.
Three. Control System Description:
The gas boiler adopts a fully automatic burner with good technical performance as the main combustion equipment, and the combustion of the burner.
The program is controlled by the more advanced combustion program controller, which can realize various functions necessary for the normal combustion of the boiler.
Protective shutdown is automatically implemented in the state, accident state and abnormal circumstances, and the corresponding temperature controller is used to achieve high and low.
Temperature indication, over-temperature indication, and adjustment to ensure that the operating temperature fluctuates within the normal range and the protective stop finger is realized when the temperature is over-temperature.
Show. 1.Basic Operations:
Turn on the power, press the "Start" button, the controller will turn on, the buzzer will sound, and the digital display window will show the water temperature of the circulating system.
Press the "Start" button, the running indicator light will be on, and the controller will work according to the selected control requirements.
Press the "Stop" button, the running indicator light goes out, and the controller stops running.
2.Set Actions:
Press the "Set" button to set the indicator light to turn on to indicate that it has entered the setting state, and at the same time the indicator light to set the value to turn on, press "+".
key to modify.
Present Time: The current time, using a 24-hour clock, effective immediately when this setting is modified.
Start-up time: When the present time reaches the start-up time, the boiler enters the running state.
Stop time: When the present time reaches the stop time, the boiler stops running.
3.Main Control Parameters:
Water temperature control: Pressurized temperature controller.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
a.When the normal temperature is 96, the controller outputs a small fire signal to close the large fire valve, and open the small fire valve to burn with a small fire.
b.When the normal temperature is 68, the controller outputs a fire signal to open the fire gas valve and burn with a large fire.
Ignition Control: The combustion program controller provides a set of independent start-stop control contacts. It can be equipped with various burners, start-stop control relays.
The loop string has a 10A fuse, and the start-stop control relay can be connected to the start-stop control end of the burner, and can also directly control the combustion.
The power supply of the burner.
4.Alarm Signal Status:
At a normal temperature of 96, a yellow indicator light is on to indicate the high temperature status.
When the normal temperature is 68, a red indicator light will be on, and an electric bell will sound to indicate a low temperature alarm, and the ignition will begin.
The burner starts the program.
When the normal temperature exceeds 96, the output of the electric bell alarm, cut off the power supply of the burner, and implement an emergency shutdown.
When the burner cannot work normally due to various faults, the output is out of order alarm, the red indicator light is on, and there is electricity.
The bell rings. 5.Indicates Status:
When the burner is running, the "automatic" signal light is on when it is in the automatic state, and "manual" when it is in the manual state
The signal light is on, indicated by a green indicator light.
High temperature, large fire burning, small fire burning and other states are indicated by yellow indicators.
Low temperature, very high temperature, burner failure, etc., are indicated by a red indicator.
6.System Control Principle:
After closing the power switch, click the water replenishment pump control switch to open the position, carry out the boiler feedwater, and click the burner power supply.
After the switch, click the start button, the power supply of the control system is turned on, and the burner and circulating water pump enter the working state, and control according to the program.
The action program of the maker is to first carry out small fire combustion and then enter the state of large fire combustion, and then the boiler enters the normal operation stage.
When the water temperature rises to higher than the water supply temperature, the output ultra-high temperature alarm signal indicator light is on, accompanied by the sound of the electric bell, and it is solid.
Now protect the furnace shutdown and cut off the power supply of the controller.
When the temperature is lower than the normal return water temperature (70), the output low temperature alarm signal indicator light is on, accompanied by the sound of electric bell, the controller outputs the fire signal to open the fire gas valve, and burns with the fire.
When the temperature is higher than the normal return water temperature (95), the output high temperature signal indicator light is on, and the controller outputs a low fire.
The signal closes the large fire valve and opens the small fire valve to burn over a small fire.
When the pressure rises to 1When it is above 28MPa, the second overpressure signal is output, and the electric bell rings to alarm and cut off the control system.
The power supply realizes emergency shutdown.
When there is a burner failure, the combustion controller automatically closes the gas valve to stop the combustion.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
7.Alarm Protection:
After the automatic controller is turned on, the pressure sensor, temperature controller power supply, fuel and gas pressure setting value are continuously checked.
Perform tests. Always test the pressure sensor, temperature controller power supply, fuel, gas and its own circuit, and find out the problem.
The controller automatically displays the fault point, and the alarm sound is emitted in the machine.
Installation instructions for the boiler:
Four. Preparation before installation:
When the boiler is transported to the use site, in order to ensure that it can run quickly, the following preparations must be made before installation:
1.Identify the installation company and verify the qualifications. Organization & Staffing:
The boiler installation unit must have the boiler installation qualification certificate issued by the competent department at a higher level that meets the scope of installation, and the installation is completed.
After that, the boiler user unit should have a special person responsible for the boiler installation work, and the boiler installation needs to have a stoker to participate, and equipped with plumbers and pliers.
workers, cranes, cold workers, welders and auxiliary workers.
2.Installation quality requirements:
The boiler installation shall meet the design requirements and comply with GB50273-2009 "Code for Construction and Acceptance of Boiler Installation Engineering".
requirements...The insulation of the boiler and its ancillary equipment and thermal piping shall comply with the requirements of GB4272.
3.Determine the installation site:
The installation site should be close to the heat use site to reduce the heat dissipation loss of the pipeline.
Easy access to water and drainage.
Fuel storage and transportation are convenient and safe.
The boiler is unobstructed when it is installed and transported.
The layout of the boiler room should be well-lit and well-ventilated, and the ground should not accumulate water, in order to ensure the operation and maintenance of the boiler.
Convenient, 4-5 meters of space in front of the furnace (starting from the edge of the burner) and 2 meters in the back of the furnace5-3 m, left side free (including blower).
Not less than 1-2 meters, and the right side of the empty space is not less than 3 meters.
4.Foundation Preparation:
After the boiler arrives, the parts are counted according to the factory packing list, and the equipment is reviewed according to the boiler installation drawing.
Integrity, check whether the large boiler parts are damaged and deformed during transportation.
cwns3.5-95 70-Y(Q) type boiler large parts when unloading, the wire rope should be worn on the lifting rings at both ends with special bolts, and no part of the large boiler should be damaged.
If the large boiler needs to be lifted, the lifting equipment capacity is not less than 20 tons, and the two lifting rings on the top of the furnace can be used for lifting, and it must not be lifted in other positions arbitrarily.
Five. Boiler bulky installation:
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
The boiler body, auxiliary equipment, accessory packaging box, and instrument packaging box should be hoisted according to the hoisting position specified by the factory. As.
The user should be responsible for the damage to the hook hoisting in any position.
Trucks, lifting equipment, wire ropes required for lashing, etc., must have sufficient load capacity and should meet the technology.
Specification of technology. Before lifting, the lifting equipment is selected according to the size and weight of the large pieces marked in the technical specifications, and the corresponding safety is formulated.
All precautions.
1.Boiler host installation:
The determination of the boiler foundation should be based on the local soil quality, and the foundation drawing provided should be redesigned by the civil engineering department.
After the boiler foundation reaches strength, it should be inspected and accepted according to the boiler drawings, and three benchmarks of the boiler as a whole should be drawn.
Line: a, longitudinal reference line - the center of the pot.
b. Horizontal reference line - front panel position line.
c, elevation baseline - can be around the foundation to select a number of relevant points to mark respectively, the corresponding offset between the markers.
It should not exceed 1mm.
After the boiler host is transported to the installation site, the center line of the boiler should be checked first, whether it is in phase with the center line drawn on the base.
Accord with; whether the normal water level of the water level gauge is level; Then check whether the contact between the base and the foundation is tight, if there is a gap, it should be added.
Horn or coated with cement to ensure that the air chamber does not leak.
2.Auxiliary installation:
For the installation of burners and circulating water pumps, unpacking and inspection should be carried out according to the supply list before installation, and the physical goods and supplies should be confirmed.
The installation can only be carried out after the list of goods is consistent and the inspection is qualified. After installation, check whether there are any shortcomings such as jamming and air leakage. Finally, turn on the power supply.
Test run to check whether the motor steering is normal, whether there is friction and vibration, and whether the motor temperature is normal.
If the connected flue duct is inconsistent with the design drawing, and the length, elbow and cross-sectional area change greatly, it should be redesigned.
Flue gas resistance, calibrate the flow rate and pressure head of the drum and induced draft fan to meet the actual needs of the boiler.
VIChimney installation:
When the chimney is installed, the asbestos rope should be embedded between the flanges, and the verticality of the chimney should be checked by the method of hanging the vertical line. If there is a deviation.
It can be leveled and corrected at the flange joint.
The wire (wire rope) is tightened with flange bolts, and it should be noted that the tightness of the three wire ropes should be about the same.
Depending on the requirements of the environment and local authorities, the height of the chimney can be shortened or heightened.
Seven. Installation of electric control cabinet:
The electric control cabinet is the switch button of the burner, water pump, water level alarm, etc. on the boiler.
Protective grounding. Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
The electric control cabinet should be installed in front of the boiler, close to the wall, so as to facilitate the monitoring of all instruments on the boiler and facilitate operation.
Eight. Installation of pipes, instrumentation valves and accessories:
According to the pipeline instrument valve drawings for installation, the feed pump should be fixed in the appropriate position, and the foundation should be poured and energized.
Test run after the source.
1.Pressure gauge:
The pressure gauge should be calibrated before installation and the next calibration date should be indicated.
When installing the pressure gauge, the dial should be facing the front of the boiler, and the pressure gauge should not vibrate after installation.
The pressure gauge is in operation and the working pressure indication is "0".
The pressure gauge tee should be flexible, no water leakage, the water should be unblocked, and the pressure gauge tube should not be insulated.
It is strictly forbidden to use the pressure gauge in one of the following situations:
1）.The pressure gauge of the limited stop nail, when there is no pressure, the pointer cannot return to the limit stop nail after turning; There is no limit to the pressure of the nail.
Force gauge, when there is no pressure, the value of the pointer from the zero position exceeds the allowable error specified by the pressure gauge.
2）.The glass face is broken or the dial scale is not clear.
3）.The seal is damaged or the inspection period has expired.
4）.Surface leakage or pointer jumping.
3.Meter for measuring temperature:
In the boiler inlet and outlet should be equipped with a temperature measurement instrument, the instrument should be able to correctly reflect the temperature of the medium, and.
It should be easy to observe.
The automatic control device of the overtemperature alarm of the water supply system should be docked according to the figure:
4.When the sewage pipe is connected to the sewage tank or other safe place, the pipe should be fixed to prevent displacement or counter-scalding during sewage discharge.
injuries and other accidents. 5.At least one elbow should be on the main outlet valve pipeline, otherwise, an expansion joint should be installed, and the wall of the pipe should be insulated.
6.Fuel line installation requirements.
The boiler burner is equipped with a valve pipe interface with oil inlet "air intake", as long as the corresponding pipe in the boiler room is connected.
Nine. Boiler installation inspection and acceptance:
After the boiler is fully installed, the boiler and ancillary equipment should be carefully inspected and accepted one by one to make it conform to the ignition.
Requirements for operation. A comprehensive inspection includes at least the following:
1.Check inside the pot: If there are any tools or debris left inside the pot. The manhole can be closed only after inspection and confirmation.
2.Outside the pot inspection: mainly check whether there is any accumulation or blockage inside the flue, and the part of the burner that is in contact with the refractory material between the combustion cylinder and the furnace sleeve.
Whether it is intact, whether there are cracks and falling off. Whether the insulation layer is intact and whether all flues are tightly sealed.
3..Other investigations:
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
Inspect all pipes and valves of the water supply system (including water treatment and boiler feed pumps).
Inspect all pipes and valves in the sewage system.
Inspect all pipes, valves and insulation of the steam supply system.
Check the electronic control instruments and protective devices in the operation room.
Ten. Hydrostatic test:
After the installation and inspection of the boiler piping and instrumentation valves and the inspection in the boiler are completed, close the manhole and hand hole, and then press the "Small and Atmospheric Pressure.
Hot Water Boiler Safety Technical Supervision Regulations".
The boiler pressure rating of this model is "0" MPa and the hydrostatic test pressure is 02mpa。
When performing a hydrostatic test, the water pressure should rise slowly when the water pressure rises to 0At 1MPa, the boost should be paused to check for presence.
Water leaks or anomalies. Then boost to the test pressure 02MPa, hold for 20 minutes, if the pressure does not drop, reduce to the rating.
Vapor pressure 0Check at 1MPa.
The specific operation and qualification standards of the hydrostatic test are shown in Section 19 of this manual. Hydrostatic test operation:
Instructions for use of boilers:
Instructions for use.
Ovens and ovens:
The stoker personnel shall comply with the requirements of the "Regulations on the Assessment and Management of Boiler Stoker Personnel" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China.
Water quality laboratory technicians should also hold the corresponding qualification certificates.
Eleven. Ovens and ovens:
After the installation of all parts of the boiler is completed, after inspection and trial operation, it is confirmed that each component has the conditions for safe working and can be opened.
Oven and oven.
1.Cooking oven: The following conditions should be met before the oven is baked:
The boiler and its water treatment, sewage, fuel transportation, lighting and other systems have been installed and the water pressure test has been qualified.
The anti-corrosion and heat preservation are finished, and the air leakage test is qualified.
Thermal and electrical instruments such as pressure gauges and temperature measuring instruments of boilers should be installed and tested.
The boiler feed water shall comply with the relevant provisions of GB1576-2001 "Industrial Boiler Water Quality".
Pipelines, flues, and valves should be marked with the flow direction, opening direction and opening height of the medium.
After the installation of each part of the boiler is inspected and tested, it can be boiled after confirming that the safe starting conditions of each component are met.
Furnace. 1.When cooking the furnace, appropriate chemicals need to be added to the boiler to make the boiler water alkaline and remove dirt such as grease.
2.The above-mentioned drugs used in the furnace should be prepared into a homogeneous solution with a concentration of 20%, and the solid drugs should not be added directly to the boiler.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
3.Close the pipe seat and hand hole of each part, and the main outlet valve seat, open the manhole, pour the prepared drug solution into the pot at one time, and then close the manhole and open the vent valve; Let the air in the furnace have a passage to the outside.
4.After clicking the power switch of the burner, click the start button, the power supply of the control system is turned on, the burner enters the working state, and the pot should always be kept without pressure according to the action program of the program controller.
5.After the boiler water temperature gradually rises to 70, the blowdown valve is opened to release all the sewage.
The purpose of the cooker is to add NaOH and Na3PO4 inside the boiler12H2O is chemically treated, using a closed cooking furnace, put.
The oil and rust in the pot are removed to ensure that the boiler is heated evenly and runs normally.
The dosage when cooking the furnace should be in accordance with the provisions of the following table:
The name of the drug. Dosage kg m
3 water. Rust is more.
Thin. The rust is thicker.
Sodium hydroxide (Naoh) 2 3 3 4
Trisodium phosphate (Na3PO4) 2 3 3 4
Pharmaceuticals are calculated as 100% purity. When there is no trisodium phosphate, sodium bicarbonate can be used instead, and the quantity is 1 of trisodium phosphate5 times.
Sodium carbonate cookers can be used alone in quantities of 6kg m
3 water. At the end of the furnace, the boiler pressure should be kept at about 75% of the working pressure, and the cooking time is generally 2-3 days.
During the cooking period, the furnace water should be regularly taken for laboratory analysis, and the furnace water should not be less than 45mo1 l, otherwise it should be supplemented.
After the cooking furnace is completed, the sediment in the header box of the pot should be cleaned, and the inside of the boiler and the valve that has been in contact with the liquid medicine should be flushed.
Check whether the sewage is blocked.
After cooking, the following requirements should be met:
The inner wall of the pot and header should be free of oil stains.
After wiping off the attachment, the metal surface should be free of rust spots.
Oven work should be possible at the same time as the oven is finished.
If the boiler does not meet the requirements, the quality of the circulating water will deteriorate, corrode the pipe fittings, headers and other components, and endanger the safety and economy of the boiler.
operation, affecting the service life of the boiler.
8.After the boiler is cooled, open the manhole and hand hole cover, clean the inside of the boiler with clean water, and check it, if it is found, it is still there.
When the oil is dirty, the furnace should be boiled again according to the above method until there is no oil pollution inside the boiler.
Twelve. Ignition:
1.Before the boiler is ignited, a comprehensive inspection should be carried out (including the relevant accessory pipes), the blowdown valve should be closed, and the venting valve should be opened to allow the boiler.
Inside air can be exhausted.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
2.The treated water is slowly injected into the boiler, and the inlet water temperature is generally not higher than 40.
3.The temperature should not increase too quickly when the fire is raised, so as to avoid excessive thermal stress caused by uneven heating of all parts, which will affect the life of the boiler.
The time for the initial fire to rise from the cold furnace to the working pressure is 3-4 hours.
4.When the temperature in the boiler gradually rises, attention should be paid to whether there is a special sound in each part of the boiler, if there is any, the furnace should be stopped immediately for inspection, and the operation can be continued only after the fault is lifted.
A baker's dozen. System heating:
When the water temperature in the pot is close to the working temperature, prepare to supply hot water to the outside, and the combustion in the furnace is stable before hot water.
When heating water, the main outlet valve should be opened slowly, so that the small amount of hot water can be used to warm the pipe, and the heating time is according to the length and diameter of the pipe.
and so on, generally not less than 30 minutes, when heating the pipe should pay attention to the expansion of the pipe and the situation of the pipe support, if found.
In the case of abnormal conditions, the heating pipe should be stopped immediately, and the fault and defect should be eliminated, and the water outlet valve can be fully opened only after the pipeline has been heated and the condensate on the pipeline is gradually reduced. The opening should be carried out slowly, and at the same time, pay attention to whether there is any special sound in each part of the boiler, if there is one, it should be checked immediately, and the furnace should be stopped for inspection if necessary. After the outlet valve is safely opened, the outlet valve handwheel should be returned half a turn to prevent it from turning after thermal expansion.
point, after the boiler is heated, the auxiliary parts, valves, and instruments should be checked again for leakage, and the closure should be returned to prevent thermal expansion and contraction.
1 turn, the rated output can be reached under the condition of stable combustion.
Fourteen. Normal operation:
During the normal operation of the boiler, it is required that the temperature difference between the boiler and the return water is normal, and the boiler room should be kept clean and tidy, and the work should be delivered.
Strengthen the observation of various mechanical equipment and instruments to ensure safety and reliability, prevent accidents, pay attention to fuel conservation, and stokers.
Workers should regularly summarize work experience and continuously improve the level of operation.
1.Make-up water requirements: Boiler feedwater needs to be treated, and the total hardness of feedwater is 003mmol/l。
2.The leakage meter of the hot water circulation system does not exceed 1% of the system's water capacity per hour
3.The circulating pump of the water supply equipment must be kept in continuous operation**
4.Normal Operation:
During operation, attention should be paid to whether there is a special sound in each part of the boiler, and if there is, it should be checked immediately, and the furnace should be stopped for inspection and solution if necessary.
Except for the fault, the operation can be resumed.
5.Clean inside the boiler room.
The boiler room should be kept clean and tidy, and no other sundries should be piled up in the boiler room.
Pay attention to the indoor lighting, water level gauge, and pressure gauge should make the stoker clearly observed, and often patrol the surroundings of the boiler to check the pot.
Whether the furnace and ancillary parts are normal.
6 Delivery**:
In order to ensure the safe, reliable and economical operation of each shift, the stoker should do the following work when handing over the first shift
* The stoker should arrive at the boiler room before the specified time and be ready.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
* The stoker should do:
The boiler temperature is normal. Combustion in the furnace is stable.
The machinery and equipment are operating normally.
All accessories of the boiler (including pipes, valves, and instruments) are safe, sensitive and reliable.
The boiler room is clean and tidy, the lights are bright, and the two sides should be thorough and serious, and at the same time, the situation and problems in the delivery should be recorded in the operation record.
Transcript. Fifteen. Blowdown:
Generally, the boiler feed water contains more or less minerals and sediment, and after the feed water enters the boiler, the minerals remain in the pot and are concentrated.
After shrinking to a certain extent, it settles down in the pot, and the longer the runtime, the more sediment will be deposited, in order to prevent limescale from causing it.
If the boiler is damaged, the quality of the furnace water must be ensured, and the alkalinity of the furnace water should not exceed 125 milligram equivalent liters, when exceeding the above range, should.
Drain the furnace water.
When the test conditions are not yet complete, general users can regularly discharge sewage according to the specific situation, such as once a day or per shift.
Wait for a while. Attention should be paid to the following matters when discharging pollutants:
1.If two or more boilers use the same blowdown manifold, and there is no check valve on the blowdown pipe, it should be noted:
It is forbidden for two boilers to drain at the same time.
If another boiler is being overhauled, the boiler under maintenance must be separated from the blowdown line partition before blowdown.
2.Blowdown should be carried out at low load, if the section of the blowdown pipe does not lead to the blowdown tank or blowdown well, and there is no protection.
The equipment must know exactly that there is no one near the end of the sewage pipe before it can be discharged, so as to avoid accidents during the discharge.
3.The specific operation when discharging sewage is as follows:
Each boiler is equipped with two blowdown valves, and the second one (the one far away from the boiler) is first fully opened when draining, and then it is micro.
Open another blowdown valve (the nearest one) to preheat the blowdown pipe, and then slowly open the first blowdown after the pipe is preheated.
valve, after the sewage is completed, the first small sewage valve must be slowly closed, and then the second sewage valve must be closed after closing, so the purpose of this operation is to operate.
Use the first one to control the sewage discharge to maintain the tightness of the second one, and when the first one leaks, the second one can still be used to control the sewage discharge and discharge.
If there is an impact sound in the sewage pipeline, the first sewage valve should be closed immediately until the impact sound disappears, and then in the
Slowly open and expand, and the sewage discharge should not be continuous for a long time. so as not to affect the water cycle.
5.After the sewage is discharged, the sewage valve should be checked to see if it is tight, and the inspection method is: after closing the sewage valve for some time, in the second.
Only the pipeline behind the blowdown valve is cooled by hand, if it is not cooled, the blowdown valve must leak.
Sixteen. Shutdown:
1.There are generally three types of boiler shutdowns:
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
During the week, holidays or other circumstances, the furnace should be temporarily stopped when not in use for a short period of time.
For cleaning, inspection or repair, the furnace must be stopped normally when the water is discharged.
In case of special circumstances, the furnace will be shut down urgently for the sake of safety and reliability.
Due to the different circumstances, the requirements of the above three types of furnace shutdown are also different, which are explained as follows:
2 Temporary shutdown and normal shutdown After receiving the notice of shutdown, the stoker on duty should reduce the load and control the burner.
Adjust to low heat. The fire is low for a while and then shut down.
After the furnace is stopped, there is still steam pressure in the boiler, and the stoker is not allowed to leave his post and continue to monitor the boiler.
Within 6 hours after a normal shutdown, the door flue baffle should be closed tightly to avoid sharp cooling of the boiler. After 24 hours of furnace shutdown, the furnace.
When the water temperature does not exceed 70, all the furnace water can be released. The air valve should be opened or the safety valve should be lifted when the water is discharged.
Emergency shutdown: During the operation of the boiler, when one of the following situations is encountered, an emergency shutdown should be taken and the relevant departments should be notified.
The water supply machinery is all faulty or the water supply system is faulty, and water cannot be fed into the boiler;
Boiler components are damaged and endanger the safety of operating personnel;
Damage to the combustion equipment, or other reasons that seriously threaten the safe operation of the boiler;
Other circumstances endanger the safe operation of the boiler. The specific steps for emergency shutdown are as follows:
1.Tap the power stop button now.
2.Urgently open the vent valve, quickly cut off the boiler and the return pipe, so that the boiler is connected to the atmosphere alone.
Pass the state. 4.Power Outage Protection:
Special note: When there is a sudden power failure, the power failure protection measures must be activated, otherwise accidents such as vaporization and water hammer will occur!!
According to the operation experience at home and abroad, the more effective protection measures for sudden power failure are:
1.The boiler room is equipped with backup power supply to prevent sudden power failure accidents.
2.Use steam release valve to release steam: open the steam release valve of the gas collection tank in time to release the steam generated by the waste heat.
Stop water hammering. After the power supply is restored, before starting the circulating pump, the feed pump should be turned on to replenish water, and at the same time pass through the steam release valve handle.
The residual steam is drained, and then the over-steam escape valve is closed.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
Seventeen. Maintenance:
1.The following points should be paid attention to during the operation of the boiler:
It is not allowed to burn under positive pressure because it is easy to burn out the burner.
If the burner vibrates violently, it should be stopped for inspection.
Do not accumulate water on the ground level at the bottom of the boiler to prevent moisture corrosion of the base.
2.After the boiler runs for 2-3 weeks, it should be inspected once, and there is leakage at the interface of the valve and pipe flange and it should be repaired.
3.After the operation of the boiler every 3-6 months, the furnace should be shut down for comprehensive inspection and maintenance, and the following work must be carried out in addition to the work of the above 2:
Remove smoke and dirt from the fire surface.
Check whether there is corrosion inside and outside the boiler welded steel plate, if there is a serious defect, it should be repaired immediately, if the defect is not.
If something suspicious is found, but it does not affect the safety of production, it should be recorded for future reference.
After the inspection, boiler paint can be applied to the ignition surface to prevent corrosion.
The boiler insulation shell (outer skin) and the boiler base should be painted at least once a year.
4.Long-term maintenance methods for boilers: there are two kinds of dry and wet methods, the dry maintenance method should be used when the furnace is stopped for more than one month, and the wet maintenance method can be used for less than one month.
Dry maintenance method: After the boiler is stopped, put the furnace water, completely remove the internal dirt, rinse it, and dry it in the furnace with a slight fire (note not.)
To high heat), then divide the cubes of quicklime with a diameter of 10-30 mm in size into trays and place them in the pot without quicklime.
In contact with the metal, the weight of quicklime is calculated as 8 kg per cubic meter of pot volume, and then all the manholes, hand holes are piped.
The valve is closed, checked every three months, if the quicklime is crushed into components, it needs to be replaced immediately, and the raw stone should be removed when the boiler is re-run.
ash and dish removed.
Wet maintenance method: release the furnace water after the boiler is stopped, completely remove the internal dirt, rinse it, re-inject the treated water to full, heat the furnace water to 100, let the gas in the water be discharged out of the furnace, and then close all the valves.
Use moisturizing to avoid freezing and damaging the boiler to the furnace water.
Eighteen. Hydrostatic test operation:
1.According to the provisions of the "Regulations on Safety and Technical Supervision of Small and Atmospheric Hot Water Boilers", the boiler should be tested for water pressure if there is one of the following conditions.
After new retrofitting and relocation.
If the operation has been stopped for more than one year, the operation needs to be resumed.
Zhoukou Yuanda Taikang Boiler ***CWNS Gas Atmospheric Hot Water Boiler Installation and Instruction Manual.
5.Hydrostatic test procedure:
Before the hydrostatic test, the inlet water temperature is kept at about 20 -30, and the temperature is too low to make the outer wall of the boiler dew.
In the event of water seepage, it will be confusing and difficult, and if the temperature is too high, it will easily cause uneven expansion and expansion.
The mouth is loose and the surface temperature is too high, which can make the water droplets evaporate and the leakage is not easy to find.
When the water is full, gradually increase the pressure to 01MPa, that is, a tightness check, if necessary, can be tightened.
Blue, headhole door and handhole cover screws.
During the hydrostatic test, the water pressure should rise slowly when the water pressure is 0At 1MPa, the pressure boost should be suspended to check for water leakage or.
Anomaly. Then boost to the test pressure 02MPa, hold for 20 minutes, if the pressure does not drop, reduce to the rated vapor pressure.
Force 0Check at 1MPa.
Any situation found should be recorded so that repairs can be made when the atmospheric pressure drops.
6.The hydrostatic test is considered qualified if it meets the following conditions:
There are no water droplets and mist on the metal walls and welds of the pressurized elements.
No residual deformation was found after the hydrostatic test.
7.Safety measures and precautions:
During the hydrostatic test, there should be particularly obvious isolation signs around the test site, and idle personnel are not allowed to enter the test area.
During the hydrostatic test, the hydrostatic test operator must not stand directly in front of the flange and valve.
During the hydrostatic test, personnel who have nothing to do with the hydrostatic test shall not stand in the test area to stop**.
Description:1In the event of a transfer of boilers, all technical documentation must be handed over at the same time.