1. Overview of XMZ 80 D1200-ZB automatic press filter press
The filter chamber parts of this press filter press are made of high-strength steel plate welding, heat treatment, and machining. The single filter chamber is combined, and the middle of the filter frame is a movable core plate. There are 24 compression springs on the surface, and a sealing device is installed around the filter frame. Ensure that the filter chamber is sealed when pressing and filtering, and when the filter cake is formed in the filter chamber, the pressure of the feed pump is used to carry out a pressingThe filtration pressure is up to 08-1.0MPa, when the effluent is in a dripping state, the filtration process is completed.
Then turn off the power of the pump, close the feed valve, carry out the secondary pressing of the filter cake, dehydration: start the hydraulic device again, the piston rod of the cylinder again tightens the hold-down plate, and pushes forward. The compression spring of each filter unit shrinks, and the core plate of each filter unit is then pushed to the bottom surface of the filter plate;Thus changing the volume of the filter chamber (the volume of the filter chamber decreases with the increase of the compression force;The maximum recommended compression ratio for the filter chamber is 3:1). The filter cake is pressed;Squeeze out excess water. At maximum pressing, the working pressure in the filter chamber reaches 5About 0MPa, greatly reducing the moisture content of the filter cake.
Filter cake moisture content: The initial filter cake moisture content is about 60%-50%. The water content of the filter cake after the second pressing is reduced to about 25%-15%. (It depends on the characteristics of the material and the process of filtration and dosing.) ）
Filtration cycle: generally 05 hours times, e.g. initial cake volume: 1200L;Dry residue after pressing: about 600l. (i.e. slag once every half an hour.) (It depends on the characteristics of the material and the process of filtration and dosing.) )
Filter unit: It is made of high-strength steel plate assembly welding after heat treatment and cutting. The single filter chamber is combined, and the middle of the filter frame is a movable core plate. There are 20 compression springs on the surface, and a sealing device is installed around the filter frame. The filter chamber is sealed when the filter is pressed, and it hangs in the middle of the two side beams. The feed hole of each filter plate is in the center, and the arrangement and removal of the filter plate are easy and safe. The filter plate is not fixed to the filter press and is removable.
IIxmz 80/d1200-zbDescription of the structure and function of each component of the automatic press filter press:
1. Frame components: The frame components are mainly welded, processed and assembled by high-quality carbon structural steel (Q235-A or Q235-B). The beams supporting each filter unit are cut from a plate with a cross-section of 60x500. The rack components are the foundation of the entire machine, and all other functional components are mounted on it. The feeding and slag discharge are carried out by means of flange fittings on the frame and a screw ejector at the lower part of the filter unit, respectively.
2. Hydraulic cylinder parts: Hydraulic cylinder components are the first of the huge force required for sealing and pressing of the filter unit. The 500 mm diameter piston provides a compression force of approximately 620 tons under the action of high-pressure oil. The cylinder block is machined with high-strength forgings of grade 35. The piston rod is machined from 45 forgings and has a hard chrome plated surface.
3. Electronic control components: The electronic control components are the control components of the whole equipment, and most of the functions rely on the buttons and touch screens of the electronic control components. Using Japan Mitsubishi PLC program controller, other electronic control components using the domestic well-known Delixi brand components. The pressure transmitter adopts the well-known Fusda components in China. The pressure is adjustable, the time is adjustable, and the alarm is paused.
4. Hydraulic control components: the pressure oil of the hydraulic pump driven by the motor (one model is 10MYCY14-1B and one each of 25MYCY14-1B) compresses the piston of the hydraulic cylinder component through the pressure limiting reversing direction, and the piston relaxes the filter unit. In order to improve the speed of the piston return stroke, the reversing valve adopts the Rexroth 10-bore reversing valve of Shanghai Lixin Hydraulic Parts Factory.
5. Filter unit: In order to improve the manufacturability of the structure, a circular structure with an inner diameter of 1200mm is adopted, the main material is Q235-A steel plate, and the preloaded compression spring adopts 44 groups of 60x86 blue die springs, so that the preload reaches 220,000kN, so as to ensure that the feed liquid will not overflow during the feeding process, and the central feeding mode is adopted to ensure that each filter chamber can be evenly fed. It is equipped with a discharge guide plate after sludge dewatering.
6. Automatic plate pulling system: the plate pulling device driven by the oil motor can realize stepless adjustment of torque and speed. It can effectively improve the efficiency of the pull plate. And effectively improve the security of the equipment.
3. Main technical parameters of XMZ 80 D1200-ZB automatic filter press:
1. Equipment name: automatic chamber type high pressure press filter.
Device model: XMZ 80 D1200-ZB
2., the main technical indicators of the equipment:
A: Maximum filtration volume: 1200 liters.
b: Minimum volume after pressing: 600 liters.
c: The power of the device: 85 kilowatts.
d: Feed filtration pressure: 10mpa.
E: Pressing pressure: 5MPa
F: Hydraulic working pressure: 32MPa
G: Rated holding force: 6200kN
h: Maximum stroke of the compression plate:1230mm
I: Test compression force: 7500kn
J: The operating temperature of the device is 50°C
k: For well-conditioned sludge, a single working cycle of 40 minutes.
3.The supplier ensures that the sludge that is properly conditioned during the crushing process does not spill.
4.This equipment is non-corrosion-resistant and is not suitable for use in significantly corrosive environments.
5.The matching filter cloth is: a yin and yang filter cloth with a smooth surface, and an automatic pull plate mechanism.
6.The specific structural dimensions and foundation requirements are shown in the attached drawings.
Dry mud diagram after deep dehydration:
User site
Fourth, pressing and squeezing disposal technology
Mechanism descriptionThere are roughly four forms of water occurrence in sludge, namely: A, free water B, capillary binding water C, surface adsorption water D, and internal water. We generally refer to the former as free water, and the last three as bound water. Fourth, the key to the technology is to use chemical agents or physical comprehensive methods to condition and modify the sludge particles, so that the adsorption water on the surface of the particles and the beam water in the capillary pore channel make it free water, and then precipitate it through the high-pressure depth plate and frame filter press dehydrator.
Technical features:
1) Reduction. The deep dewatering technology reduces the moisture content of the sludge to about 55% by means of dosing modification and mechanical filtration press, and the weight of the sludge is only 1 2, which greatly reduces the transportation and disposal cost of sludge.
2) Harmless. Effectively remove the harmful bacteria and heavy metals in the sludge, the added agent is a high-efficiency composite inorganic mixture, the addition amount is only 3-4% of the amount of wet sludge (80%), does not change the organic matter of the sludge, the agent will not produce secondary pollution, does not contain toxic and harmful components to the human body.
3) Stabilization. The sludge after deep dewatering has good compressive strength and good air permeability, and the sludge is difficult to dissolve when soaked in rainwater.
4) Recycling. The indicators of the mud cake after deep dewatering meet the mud quality requirements of landfill, land use and incineration. The calorific value of the sludge after the drying of municipal sludge is about 1500kcal, which can be used as a low calorific value fuel, and the calorific value of four tons of dry sludge is relative to one ton of standard coal.
5) After the dewatered sludge is dosed, the micelle structure in the mud undergoes a chemical reaction due to the dosing, which converts the adsorbed water in the micelle into interstitial water that is easy to remove, and improves the dewatering performance of the sludge. Under the action of high pressure of the high-pressure filter press, it only takes 30 45 minutes to obtain the mud cake with a moisture content of 50%, which is 1 5 1 3 of the general press dewatering time
6) 10～5.0MPa high pressure, and the use of interval and incremental pressure application process, greatly reduces the medium resistance of filtrate flow out when the mud cake is formed, and improves the dehydration efficiency.
7) The dewatered sludge of this technology is easy to crush, and the mud cake after filtering is relatively loose, and the mud cake can basically be broken by itself after transportation.
8) System features and advantages
8.1. The formula is diverse, and the appropriate formula can be selected according to the local natural resource conditions to ensure that the material is easy to obtain and the regional applicability is wide.
8.2. According to the different methods of follow-up treatment and disposal, such as landfill, incineration, land use, etc., the formula of the conditioner can be flexibly adjusted, and the process applicability is strong.
8.3. The working pressure of the system is large, and the feeding pressure is 06~0.8 MPa with a pressing pressure of 5 0 MPa and high system safety.
8.4. The processing cycle is short, and 90% of the sludge working cycle is 15 hours, 97-98% sludge working cycle 25 hours;The system has high work efficiency.
8.5. According to the characteristics of sludge, select the appropriate filter cloth to effectively extend the service life of the filter cloth on the premise of ensuring the treatment effect.
8.6. Conditioning, feeding, and pressing are all automatically controlled.
8.7. Compared with the belt dewatering machine of traditional mechanical dewatering, the moisture content of sludge is reduced to 55
8.8. The plate and frame equipment only needs to use a small amount of water as a flushing filter cloth in the treatment process, and it can be reusedClean the filter cloth for about 7 days
Process flow (1).
Moisture content 994% sludge slurry is transported to the pre-thickener by the screw pump from the sludge thickening tank for pre-concentration to 93-95%, and the sludge is transported to the modification tank by the screw pump after pre-concentration, and then the sludge is conditioned and modified by the screw pump, and then pumped to the ultra-high pressure metal filter press by the plunger, the moisture content of the mud cake is 55%, the mud cake is transported to the semi-dry mud cake temporary storage yard by the belt conveyor, and the sewage is discharged by the filter press and directly to the sewage treatment station for unified treatment.
Specific process flow:
Process flow (2).
The water content of 80 85% sludge is received by the mud tank and transported to the original mud tank by the scraper conveyor, and is transported to the screw cage through the discharging horn dragon to the modified tank, and the modified agent is also transported to the modified tank after being modulated by the supporting dissolution and mixing equipment, and then stirred after adding an appropriate amount of water, and then pumped to the finished product storage tank by the sludge conveying and pumping, and then pumped to the ultra-high pressure metal filter press by the plunger, the moisture content of the mud cake is 55%, and the mud cake is transported to the semi-dry mud cake temporary storage yard by the belt conveyor, and then can be incinerated. The sewage discharged by the filter press is collected and transported to the sewage treatment station for unified treatment.
Routing (block diagram).