The coal tar residue treatment equipment adopts a thermal cracking process to heat the coal tar residue at high temperature under the condition of no oxygen or lack of oxygen, so that the macromolecules in the organic matter are decomposed into small molecules of combustible gas, liquid fuel and coke, so as to obtain combustible gas, coal tar and coke and other chemical products.
Coal tar residue treatment process
1.Feeding: Coal tar residue is packed in tons, and the coal tar residue needs to be lifted up by a crane and put into the hopper when feeding, and the hopper is connected to a screw feeding system, which can send the coal tar residue into the cracking furnace.
2.Pyrolysis: Start the burner for preheating, preheating takes about 2 hours, when the temperature of the cracking furnace reaches 180, the coal tar residue begins to crack in the cracking furnace.
3.Oil: When the pyrolysis reaction of coal tar residue occurs in the pyrolysis furnace, oil and gas begin to be generated, and the oil and gas first pass through a buffer tank, which is used to separate heavy oil residue and light oil and gas; As the light oil gas continues forward, it enters the condensing system, where it is cooled into a liquid, i.e. liquid fuel oil, which then flows into the storage tank.
Our condensing system is composed of vertical condenser + horizontal condenser + condensing tower, with a condensation area of up to 100 to ensure that the oil and gas are fully cooled and the oil yield is improved.
4.Slag out: After the pyrolysis of coal tar residue, what remains in the cracking furnace is carbon black, mud slag, etc., and the carbon black residue is discharged through the automatic water-cooled slag removal system, and then the carbon black residue will be stored in the carbon black tank.
5.Tail gas desulfurization and purification: after the condensation treatment, there are still some non-condensable combustible gas remains, these non-condensable combustible gases first pass through the water seal device, the water seal is used to purify the non-condensable combustible gas, and at the same time can also prevent tempering, the water-sealed combustible gas is collected through a special pipeline and sent to the combustion chamber of the pyrolysis system as fuel for heating.
6.Flue gas desulfurization and dust removal purification: The exhaust high-temperature flue gas generated after the incineration of non-condensable combustible gas is first cooled by flue condensation, and then discharged up to the standard after multi-stage purification such as desulfurization tower, denitrification tower, dust removal, and activated carbon adsorption.
Coal tar residue treatment equipment
A complete coal tar residue treatment equipment is composed of several parts, such as feeding system, pyrolysis system, condensation system, heating system, slag discharge system, flue gas treatment system and electronic control system, among which the pyrolysis system is the core of the whole set of coal tar residue treatment equipment.
The pyrolysis furnace system of coal tar residue treatment equipment is a horizontal drum structure, which is composed of a furnace sleeve, a thermal insulation shell and a base. The two sides of the furnace are respectively the inlet and outlet, and the 15cm high spiral guide groove is welded inside, and there is a venting valve at the top, because the coal tar residue treatment equipment adopts a micro-negative pressure oxygen-free or less oxygen-free pyrolysis process, and after the loading is completed, the gas in the furnace needs to be slowly pumped away with negative pressure equipment to form a slight negative pressure, and it should be opened to restore the normal pressure in the furnace after the pyrolysis is completed; The thermal insulation shell is usually a large semicircular shell, which is covered with a thick layer of thermal insulation cotton and poured refractory material on the inside, which can play the effects of heat insulation, heat preservation, sound absorption and noise reduction; The furnace is placed on the base with tugboat and placed on the furnace chamber, and the coal tar residue in the furnace is heated by external heating to produce oil and gas.
Technical characteristics of coal tar residue treatment equipment
1.Clean and environmentally friendly: The coal tar residue treatment equipment is equipped with flue gas purification system (desulfurization dust removal tower, water film dust collector, pulse dust collector) and tail gas purification system (desulfurization and deodorization tower) to ensure that the waste smoke and exhaust gas and other waste emissions meet the national standards, clean and environmentally friendly.
2.Energy saving and consumption reduction: The collection and utilization of combustible gas can meet the heating supply of the pyrolysis system, and no additional heat source is required, saving energy, reducing emissions.
3.Anti-coking sticking wall: The inner liner of the main furnace of the coal tar residue treatment equipment is made of stainless steel, with better corrosion resistance, and the inner wall is specially equipped with a decoking device, that is, the scraper and the breaking device are welded on the inner wall of the main furnace, and with the rotation of the main furnace, the scraper and the breaking device will continuously lift and break up the sludge in the furnace, so as to prevent the coking of the sticking wall.
4.Wide adaptability of materials: strong adaptability and inclusiveness of raw materials, the technology is applied to waste tires, waste plastics, oily sludge, aluminum-plastic, domestic garbage, medical waste and other solid waste, hazardous waste treatment fields, one machine for multiple purposes.
5.Intelligent automation: The coal tar residue treatment equipment has a high degree of automation, and through the PLC automatic intelligent control system, each single equipment and process control point is monitored in real time, so as to truly realize intelligent and safe operation and low staffing requirements.
Technical parameters of coal tar residue treatment equipment
Coal tar residue treatment equipment end product
1.Fuel oil: The fuel oil refined from coal tar is beige (or orange), clear and translucent, with high calorific value, which can be widely used in the field of industrial and civil fuel, and can also partially replace diesel fuel for power use, which is very widely used.
2.Carbon black: equivalent to secondary coal or coal dry stone, it has a certain calorific value and is used for industrial heating.
3.Combustible gas: After the combustible gas is purified, it is collected through a special pipeline and sent to the combustion chamber of the pyrolysis system as fuel for heating, which can be recycled.
Coal tar residue environmental protection treatment plan
1.Environmental protection treatment of waste smoke: the waste smoke generated in the combustion process of non-condensable combustible gas enters the desulfurization and dust removal tower together with the exhaust gas of fuel combustion, and enters the desulfurization tower from the lower part of the cylinder through the dust-containing flue gas of the induced draft fan, and after four sprays and four layers of ceramic filler, the flue gas is evenly dispersed by the filler, and the gas is fully mixed with the added liquid in the filler through layer by layer spray to achieve the purpose of desulfurization and denitrification. The dust particles are separated by centrifugal force, and the smoke and dust are adsorbed by the water film layer produced by the spray, flow to the bottom cone with the water, and are discharged through the dust discharge port to achieve the purpose of dust removal.
2.Environmental protection treatment of waste gas: The exhaust gas is mainly used in the exhaust gas generated in the pyrolysis refining process, which contains a small amount of polluting gases, such as H2S, NOX, COX, SOX, etc. After the tail gas is deodorized and purified by the desulfurization, desulfurization and deodorization tower, it can be returned to the pyrolysis furnace as fuel to help customers solve the problem of high odor in the refinery.
3.Wastewater environmental protection treatment: In the pyrolysis and refining process of coal tar residue treatment equipment, both cooling water and dust removal water are all used in circulating water to ensure that there is no wastewater discharge in the production process. In addition, the condensing equipment adopts a tubular condenser design, with oil in the pipe and water outside the pipe, with zero contact between water and oil, and the cooling water can be recycled without waste water.
4.Environmental protection treatment of waste residue: The residual carbon black slag in the pyrolysis furnace is transferred and transported from the pyrolysis area to the carbon black deep processing area through a wind-sealed pipeline, and is equipped with a pulse bag filter (dust removal efficiency 99.).More than 9%), the uncaptured carbon black is collected and discharged through the exhaust cylinder to reduce dust pollution at the refining site.
Coal tar residue treatment equipment market application
The coal tar residue treatment equipment developed and designed by Henan Dongying has been widely used in many project sites in Shaanxi, Shanxi, Inner Mongolia and Hubei in China, and has been tested by the market. As shown in the figure below, this is 8 sets of oil sludge and oil residue treatment equipment ordered by Shaanxi customers in our company, and Dongying engineers are in the final stage of installation and commissioning of the equipment, which will be officially put into production in the near future.