CN211972225U - A waste pyrolysis tar separation device - Google Patents

Abstract

The utility model belongs to the technical field of petrochemical and domestic waste treatment equipment, and in particular relates to a waste pyrolysis tar separation device, comprising an air intake mechanism, a pyrolysis oil and gas quenching trap and a tar separation tank, wherein the air intake mechanism and the pyrolysis The oil and gas quenching collector and the tar separation tank are connected, and the air intake mechanism and the pyrolysis oil and gas quenching collector are located on the top of the tar separation tank. The nozzle of the waste pyrolysis tar separation device is also connected with a centrifugal pump. The high-temperature pyrolysis oil and gas is quenched and cooled to capture and precipitate heavy oil, and then stand and separate for a sufficient residence time to purify and precipitate a light oil-water mixture. The heavy oil and light oil are collected and utilized in the entire process system through the equipment itself. In the process of purifying light oil, the clean water or the oil-water mixture with less oil content is circulated to cool and pyrolyze oil and gas, so as to realize the repeated utilization of water resources and save water resources. The separation technology of the invention is simple, the structure is simple, and the economic cost is reduced.

Description

A waste pyrolysis tar separation device

technical field

The utility model belongs to the technical field of petrochemical and domestic waste treatment equipment, in particular to a waste pyrolysis tar separation device.

Background technique

At present, tar separation in the domestic market mainly adopts spraying combined with centrifugal separation. The biggest disadvantage of spraying separation is that it is limited by the temperature of the cooling medium, and the water vapor evaporated by the cooling medium is difficult to dissipate in time. When the temperature of the cooling medium increases, The collection efficiency of tar decreases accordingly. In the next step, the tar enters the water storage tank through the drain pipe, and can be recycled after water treatment. Therefore, the existing tar separation technology process and equipment structure are complicated, and it needs circulating water cooling, centrifugal separation, etc. A storage tank with a large area is required, and the tar at the bottom of the storage tank needs to be cleaned frequently, which increases the complexity of the process cleaning operation and the purchase cost of the equipment cost. The separation of tar and water is currently a mature equipment commonly found in petrochemical and domestic waste treatment fields in China. Most of the domestic processes use water washing to remove tar, and the combined application of water washing tower and Venturi equipment removes heavy tar in gaseous components. Although the removal and separation efficiency of tar is improved, a large amount of water resources are required, resulting in secondary pollution or treatment, and the treatment cost is high. However, most tar separation equipment generally has complex equipment structure, high manufacturing cost, high cleaning and maintenance cost, which is not conducive to the continuous and stable operation of engineering equipment in terms of economy and time. In addition, under higher temperature conditions, the main form of tar is a black viscous liquid with a relative density greater than 1, and the asphalt content is the largest, so the fuel gas must be purified when it enters the generator set.

Therefore, there is an urgent need to solve the above-mentioned shortcomings in the prior art.

SUMMARY OF THE INVENTION

The main purpose of the utility model is to provide a garbage pyrolysis tar separation device, which can realize detachable installation and prolong the service life.

The technical scheme adopted by the utility model is:

A garbage pyrolysis tar separation device, comprising an air inlet mechanism, a pyrolysis oil and gas quenching trap and a tar separation tank, wherein the air inlet mechanism is sequentially connected with the pyrolysis oil and gas quenching collector and the tar separation tank, and the air inlet mechanism and the heat The gas solution quenching traps are located on the top of the tar separation tank. The nozzle of the waste pyrolysis tar separation device is also connected with a centrifugal pump.

The waste pyrolysis tar separation device is also connected with a cooler, and the cooler is connected with the centrifugal pump.

The intake mechanism is composed of a push rod motor, a one-way swing intake piston and a T-shaped three-way pipe. The top port of the T-type three-way pipe is provided with a push rod motor, the lower port of the T-type three-way pipe is provided with a one-way swing intake piston, and the left port of the T-type three-way pipe is the high temperature pyrolysis oil and gas inlet.

The one-way swing intake piston is provided with an intake hole, which can allow pyrolysis of oil and gas or a small amount of water vapor to enter the equipment below. The lower part of the one-way swing intake piston has a spring-loaded flap to prevent reverse flow of the gas underneath.

There are two purified gas outlets on the outside of the top of the pyrolysis oil and gas quenching collector, which is convenient for the water vapor of the cooling medium and the cooling and purified pyrolysis gas to be dissipated in time to affect the cooling efficiency. The top of the wall plate of the pyrolysis oil and gas quench collector is provided with a water spray head, which cools and captures the tar in the pyrolysis oil and gas by spraying cooling water or oily water. The inside of the side wall of the pyrolysis oil and gas quenching trap is provided with a No. 1 overflow baffle groove. The side wall of the pyrolysis oil and gas quenching trap is also connected with a bypass pipeline, and the bypass pipeline leads to the tar separation tank. The oil-water mixture gradually accumulated in the pyrolysis oil and gas quenching trap passes through the No. 1 overflow baffle tank and flows into the tar separation tank below through the bypass pipeline.

A ball valve is arranged in the bypass pipeline. In the early stage of operation, keep the ball valve closed to prevent the pyrolysis oil and gas from directly entering the lower tar separation tank. The heavy oil enters the tar separation tank through the lower nozzle of the pyrolysis oil and gas quenching trap.

The lower part of the pyrolysis oil and gas quenching trap is provided with an oil guiding water pipe.

The tar separation tank includes three inner chambers: chamber one, chamber two and chamber three. The first chamber is for the rough separation of heavy oil and water, and most of the heavy oil is discharged from this chamber. Chamber II heavy oil separation. The main function of chamber three is the fine separation of light oil.

The bottom of cavity one is provided with a No. 1 heavy oil outlet, and the upper part is provided with a No. 1 clean oil outlet. The bottom of cavity two is provided with the No. 2 heavy oil outlet, and the upper part is provided with the No. 2 clean oil outlet. The bottom of cavity three is provided with No. 3 heavy oil outlet, and the upper part is provided with No. 3 clear oil outlet.

The oil guiding water pipe is arranged in the cavity one. The lower end of the oil guiding water pipe is connected with an overflow basket cover. A waterproof hammer check valve is arranged inside the overflow basket cover.

The cavity 1 and cavity 2 and cavity 2 and cavity 3 are all separated by steel plates with overflow square through holes. There is a No. 1 baffle plate 18b welded on the wall plate of the tar separation tank in front of the overflow square through hole between cavity 1 and cavity 2, and a tar separation plate welded in front of the overflow square through hole between cavity 2 and cavity 3. No. 2 baffle 18a on the tank wall. The oil-water mixing short circuit between the three cavities is prevented by the pressure drop resistance.

Cavity 1 is welded with No. 2 overflow baffle groove on the inner wall close to cavity 2, cavity 2 is welded with No. 3 overflow baffle groove on the inner wall close to cavity 3, and cavity 3 is on the side close to cavity 2. The No. 4 overflow baffle groove is welded on the inner wall. The bottom plate of all overflow baffle troughs is an inclined wall to facilitate the outflow of light oil.

There is a No. 1 purge port between the No. 2 overflow baffle groove and the partition steel plates of chambers 1 and 2, and a No. 2 purge port is set between the No. 3 overflow baffle groove and the separation steel plates of chambers 2 and 3. , There is a No. 3 purge port between the No. 4 overflow baffle groove and the separating steel plates of the second and third chambers. The purge port can pass nitrogen or water. When the nitrogen is passed through, the light oil slick can be purged and discharged, and when the water is passed through, the wall plate can be washed to prevent the accumulation of oil pollution.

The upper part of the top wall of the cavity one is provided with a No. 1 water supply port, and the lower part of the No. 1 water supply port is connected with a No. 1 diversion cover. The upper part of the top wall of the cavity three is provided with a No. 2 water supply port, and the lower part of the No. 2 water supply port is connected with a No. 2 diversion cover.

The tar separation tank is also provided with a liquid level gauge and a thermometer. The liquid level gauge is located outside the equipment on the right side of chamber three. The thermometer is located on the outside of the chamber 3 device near the nozzle. The function of the liquid level gauge is to control the amount of water replenishment and the overflow of light oil-water mixture or oil slick across the partition by observing the level of the liquid level in the tank through on-site direct reading or remote transmission. The function of the thermometer is to read the temperature of the solution in the tar separation tank and turn on the cooler in real time to cool the cooling water or oil-water mixed liquid pumped back to the pyrolysis oil and gas trap. Under normal circumstances, the cooler is not often turned on.

The remarkable effect achieved by the utility model is:

The utility model firstly adopts the self-designed non-return type air intake mechanism, which ensures the safety of preventing the leakage of the gas entering the device system. Then, the tar substance in the gas is quenched and captured by the circulating water, passes through the equipment quenching trap, overflows Basket cover and tar separation tank device realize multi-stage purification, purification and precipitation process of tar, and at the same time, combine centrifugal pump and existing cooler to cool the water, realize the recycling of cooling water, reduce the utilization of water resources, and realize the realization of water resources. reuse and save water resources. The oil-water mixture in the three chambers of the tar separation tank is statically separated to realize the multi-stage separation of light and heavy tar. Combined with the circulating cooling water of the centrifugal pump and the quench cooler, the gas entering the quench trap device is quenched and captured, increasing the Effectiveness of tar trapping by large cooling. The light oil is sent out through the baffle tank of the device, and the heavy tar is sent out from the outlet of the lower pipe, so that the generated tar enters the next process stage for treatment and the circulation of cooling water, which ensures the continuous and stable operation of the device. In addition, the device of the present invention has a simple structure, and the pyrolysis oil and gas quenching trap and the tar separation tank can be fabricated only by tailor welding of correspondingly designed steel plates, and the manufacturing cost is low. The tar automatically flows out through the baffle groove and the lower nozzle, and the manual cleaning and maintenance costs are reduced.

Description of drawings

Fig. 1 is the front view of waste pyrolysis tar separation device;

Fig. 2 is a top view of a waste pyrolysis tar separation device;

Figure 3 is the left side view of the waste pyrolysis tar separation device.

Among them: 1 is the push rod motor; 2 is the T-shaped three-way pipe; 3 is the purified gas outlet; 4 is the water spray head; 5 is the one-way swing intake piston; ; 7 is ball valve; 8 is waterproof hammer check valve; 9 is overflow basket cover; 10 is tar separation tank; 11a is No. 1 heavy oil outlet; 11b is No. 2 heavy oil outlet; 11c is No. 3 heavy oil outlet; 12 is pipe 13a is the No. 2 shroud; 13b is the No. 1 shroud; 14a is the No. 2 water supply port; 14b is the No. 1 water supply port; 15a is the No. 4 overflow baffle groove; 15b is the No. 3 overflow baffle 15c is the No. 2 overflow baffle groove; 15d is the No. 1 overflow baffle groove; 16a is the No. 3 purge port; 16b is the No. 2 purge port; 16c is the No. 1 purge port; 17a is the No. 3 port Clear oil outlet; 17b is No. 2 clear oil outlet; 17c is No. 1 clear oil outlet; 18a is No. 2 baffle; 18b is No. 1 baffle; 19 is oil guide water pipe; 20 is liquid level gauge; 21 is cavity one; 22 is cavity two; 23 is cavity three; 24 is a cooler; 25 is a thermometer; 26 is a circulating pump; 27 is a bypass pipe.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1-3, the utility model provides a garbage pyrolysis tar separation device, including an air intake mechanism, a pyrolysis oil and gas quenching trap 6 and a tar separation tank 10, wherein the air intake mechanism and the pyrolysis oil and gas are sequentially The quenching collector 6 and the tar separation tank 10 are connected together, and the air intake mechanism and the quenching collector 6 for pyrolysis oil and gas are both located on the top of the tar separation tank 10 . The nozzle 12 of the waste pyrolysis tar separation device is also connected with a centrifugal pump 26, which is used for the recycling of cooling circulating water during actual operation, thereby reducing the amount of water.

The waste pyrolysis tar separation device is also connected with a cooler 24 , and the cooler 24 is connected with a centrifugal pump 26 .

The intake mechanism is composed of a push rod motor 1 , a one-way swing intake piston 5 and a T-shaped three-way pipe 2 . The top port of the T-type three-way pipe 2 is provided with a push rod motor 1, the lower port of the T-type three-way pipe 2 is provided with a one-way swing type intake piston 5, and the left port of the T-type three-way pipe 2 is high temperature heat Solve oil and gas imports.

The one-way swing type intake piston 5 is provided with an intake hole, which can make the pyrolysis oil and gas or a small amount of water vapor enter the equipment below. The lower part of the one-way swing intake piston 5 has a flip cover with a spring to prevent the reverse flow of the gas below. The main function of the one-way swing intake piston 5 is to seal the gas and at the same time, when the inner wall of the T-shaped tee 2 adheres to the pyrolysis oil, it can remove the oil by moving up and down to prevent blockage and poor ventilation.

Two purified gas outlets 3 are provided on the outer side of the top of the pyrolysis oil and gas quenching trap 6, so that the water vapor of the cooling medium and the cooled and purified pyrolysis gas can be dissipated in time to affect the cooling efficiency. The top of the wall plate of the pyrolysis oil and gas quench collector 6 is provided with a water spray head 4, which cools and captures the tar in the pyrolysis oil and gas by spraying cooling water or oily water. A No. 1 overflow baffle groove 15d is provided on the inner side of the side wall of the pyrolysis oil and gas quenching trap 6 . A bypass pipe 27 is also connected to the side wall of the pyrolysis oil and gas quenching trap 6 , and the bypass pipe 27 leads into the tar separation tank 10 . The oil-water mixture gradually accumulated in the pyrolysis oil and gas quenching trap 6 passes through the No. 1 overflow baffle tank 15d and flows into the lower tar separation tank 10 through the bypass pipe 27 .

A ball valve 7 is provided in the bypass pipe 27 . In the early stage of operation, keep the ball valve 7 closed to prevent the pyrolysis oil and gas from directly entering the lower tar separation tank 10 . The heavy oil enters the tar separation tank 10 through the lower nozzle of the pyrolysis oil and gas quenching trap 6 .

The lower part of the pyrolysis oil and gas quenching trap 6 is provided with an oil guiding water pipe 19 .

The tar separation tank 10 includes three inner chambers: chamber one 21 , chamber two 22 and chamber three 23 . The first cavity 21 and the second cavity 22 and the second cavity 22 and the third cavity 23 are separated by steel plates with overflow square through holes. Cavity one 21 is used for rough separation of heavy oil and water, and most of the heavy oil is discharged from this cavity. The second chamber 22 separates heavy oil. The main function of chamber three 23 is the fine separation of light oil.

The bottom of the cavity 21 is provided with a No. 1 heavy oil outlet 11a, and the upper part is provided with a No. 1 clean oil outlet 17c. The bottom of the cavity two 22 is provided with the No. 2 heavy oil outlet 11b, and the upper part is provided with the No. 2 clean oil outlet 17b. The bottom of the chamber three 23 is provided with the No. 3 heavy oil outlet 11c, and the upper part is provided with the No. 3 clean oil outlet 17a. The heavy oil is discharged through the heavy oil outlet, and the light oil is discharged through the light oil outlet, and enters the next process, which is processed or collected and utilized in the entire system.

The oil guiding water pipe 19 is arranged in the cavity one 21 . The lower end of the oil guiding water pipe 19 is connected with the overflow basket cover 9 . The overflow basket cover 9 is provided with a waterproof hammer check valve 8, which is used to prevent the backflow of oil and water in the cavity and reduce the impact of the oil and water on the inner wall of the cavity by means of overflow.

The first cavity 21 and the second cavity 22 and the second cavity 22 and the third cavity 23 are separated by steel plates with overflow square through holes. There is a No. 1 baffle 18b welded on the wall plate of the tar separation tank 10 in front of the overflow square through hole between the first cavity 21 and the second cavity 22, and in front of the overflow square through hole between the second cavity 22 and the third cavity 23 There is a No. 2 baffle 18a welded to the wall of the tar separation tank 10. The oil-water mixing short circuit between the three cavities is prevented by the pressure drop resistance.

The cavity one 21 is welded with the No. 2 overflow partition groove 15c on the inner wall of the side close to the cavity two 22, the cavity two 22 is welded with the No. 3 overflow partition groove 15b on the inner wall near the cavity three 23 side, and the cavity three 23 The No. 4 overflow baffle groove 15a is welded on the inner wall of the side close to the second cavity 22 . When the light oil on the liquid level floats and accumulates, the light oil overflows into the baffle cavity of the overflow baffle groove by increasing the water replenishment amount. The bottom plates of the overflow baffle grooves 15a, 15b and 15c are inclined wall plates to facilitate the outflow of light oil.

No. 1 purging port 16c is provided between the No. 2 overflow baffle groove 15c and the partition steel plates of the first cavity 21 and the second cavity 22, and between the No. 3 overflow baffle groove 15b and the partition steel plates of the second cavity 22 and the third cavity 23 The No. 2 purge port 16b is provided, and the No. 3 purge port 16a is provided between the No. The purge port can pass nitrogen or water. When the nitrogen is passed through, the light oil slick can be purged and discharged, and when the water is passed through, the wall plate can be washed to prevent the accumulation of oil pollution.

The upper part of the top wall of the cavity one 21 is provided with a No. 1 water supply port 14b, and the lower part of the No. 1 water supply port 14b is connected to a No. 1 duct hood 13b. The upper part of the top wall of the cavity 3 23 is provided with the No. 2 water supply port 14a, and the lower part of the No. 2 water supply port 14a is connected with the No. 2 diversion cover 13a.

The tar separation tank 10 is also provided with a liquid level gauge 20 and a thermometer 25 . The liquid level gauge 20 is located outside the equipment on the right side of the chamber three 23 . The thermometer 25 is located on the outside of the chamber 3 23 near the nozzle 12 . The function of the liquid level gauge 20 is to control the amount of water replenishment and the overflow of light oil-water mixture or oil slicks across the partition by observing the liquid level in the tank through direct reading or remote transmission on site. The function of the thermometer 25 is to read the temperature of the solution in the tar separation tank 10, and turn on the cooler 24 in real time to cool the cooling water or oil-water mixed liquid pumped back to the pyrolysis oil and gas trap. Under normal circumstances, the cooler is not often turned on. .

The use steps of the garbage pyrolysis tar separation device provided by the present invention are as follows:

First, add water to the tar separation tank 10 through the No. 2 water replenishment port 14a and the No. 1 water replenishment port 14b. The amount of water to be added is observed or controlled by the liquid level gauge 20. When the liquid level in the tank reaches 100mm from the top of the No. 4 overflow baffle plate 15a, the water supply is stopped. Close the ball valve 7 and start the circulating pump 26 to add water to the pyrolysis oil and gas quenching trap 6. At this time, the water in the tar separation tank 10 and the water in the pyrolysis oil and gas quenching trap 6 are in communication. When the water in the pyrolysis oil and gas quenching trap 6 stabilizes to a certain level, the high-temperature pyrolysis oil and gas for processing is fed into the air intake mechanism for formal separation. At the beginning of operation, keep the one-way swing piston 5 in the upper top position. During operation, except for oil stains on the inner wall of the T-shaped tee pipe 2 or when other equipment is overhauled for a short period of time, the one-way swing piston 5 can be positioned at the intake air. The part below the mouth seals the gas below, and the high temperature pyrolysis oil gas is quenched by the cooling water of the water spray head 4 to capture the tar components, and the heavy oil flows into the cavity 1 21 in the tar separation tank 10 from the lower equipment mouth. The preliminarily purified and cooled pyrolysis gas and water vapor at the upper part of the pyrolysis oil and gas quenching trap 6 enter the next process system from the purified gas outlet 3 for treatment. When a certain amount of oil-water mixture and light oil is accumulated in the liquid level of the trap, the ball valve 7 can be opened to make it flow into the cavity 1 21 of the tar separation tank 10 below.

The oil and water containing heavy oil components enter the cavity 1 21 through the oil guiding water pipe 19, the waterproof hammer check valve 8 and the overflow basket cover 9. The purpose of the combination of these three components is to prevent the oil and water from impacting and damaging the bottom plate of the tar separation tank 10. The turbulent flow disturbance of the mixed oil and water in the cavity one 21 affects the separation effect and time of the heavy oil. The main function of cavity one 21 is the primary separation of oil and water mixing, the oil and water with higher concentration enter into cavity two 22 through the opening to separate again, and then separate the water with higher basic cleanliness and a very small part of oil in the last cavity three 23 in turn.

When a certain amount of oil-water mixture or light oil accumulates on the liquid level, it can flow into the overflow baffle groove 15a/b/c by adjusting the water replenishment amount. The inclined bottom plate of the overflow baffle groove is conducive to the outflow of the light oil, which passes through the light oil outlet 17a /b/c flows out; nitrogen or clean water is introduced into the purging port 16a/b/c, which can purge or remove the oil and dirt in the baffle tank.

In addition, during long-term operation, the temperature of the water with higher purity or the oil-water solution with less oil content in the chamber 3 23 will gradually increase, and the temperature of the solution in the chamber can be observed by the thermometer 25 . At this time, the cooling water pumped back to the pyrolysis oil and gas quenching trap 6 can be cooled by opening the cooler 24 to prevent the efficiency of capturing pyrolysis oil and gas therein from decreasing.

Claims (10)

1. a waste pyrolysis tar separation device, is characterized in that: comprise air intake mechanism, pyrolysis oil and gas quenching trap (6) and tar separation tank (10), wherein air intake mechanism and pyrolysis oil and gas quenching catch successively The device (6) and the tar separation tank (10) are connected, the air intake mechanism and the pyrolysis oil and gas quenching trap (6) are located on the top of the tar separation tank (10), and the garbage pyrolysis tar separation device is also connected with a centrifugal The pump (26) and the cooler (24), the nozzle (12) of the garbage pyrolysis tar separation device is connected with the centrifugal pump (26), and the cooler (24) is connected with the centrifugal pump (26). 2. The garbage pyrolysis tar separation device according to claim 1, characterized in that: the air intake mechanism is composed of a push rod motor (1), a one-way swing intake piston (5) and a T-shaped three-way pipe (2), wherein the top port of the T-shaped three-way pipe (2) is provided with a push rod motor (1), and the lower port of the T-shaped three-way pipe (2) is provided with a one-way swing type intake piston (5) , the left port of the T-shaped three-way pipe (2) is the high temperature pyrolysis oil and gas inlet, the one-way swing intake piston (5) is provided with an intake hole, and the one-way swing intake piston (5) is provided with an intake hole. The lower part has a flap with a spring. 3. The garbage pyrolysis tar separation device according to claim 1, characterized in that: the tar separation tank (10) comprises a cavity one (21), a cavity two (22) and a cavity three (23), and the cavity one ( 21) and cavity 2 (22), cavity 2 (22) and cavity 3 (23) are separated by steel plates with overflow square through holes, and the bottom of cavity 1 (21) is provided with a No. 1 heavy oil outlet ( 11a), the upper part is provided with a No. 1 clean oil outlet (17c), the bottom of the chamber two (22) is provided with a No. 2 heavy oil outlet (11b), the upper part is provided with a No. The No. 3 heavy oil outlet (11c), and the No. 3 clean oil outlet (17a) is arranged on the upper part. 4. The garbage pyrolysis tar separation device according to claim 3, characterized in that: the upper part of the top wall of the cavity one (21) is provided with a No. 1 water supply port (14b), and the lower part of the No. No. 2 shroud (13b), the upper part of the top wall of cavity three (23) is provided with a No. 2 water supply port (14a), and the lower part of the No. 2 water supply port (14a) is connected with a No. 2 shroud (13a). 5. The garbage pyrolysis tar separation device according to claim 3, characterized in that: before the overflow square through hole between the cavity one (21) and the cavity two (22), a tar separation tank (10) is welded in front of the overflow square through hole. ) No. 1 baffle plate (18b) on the wall plate, and No. 2 baffle plate welded on the wall plate of the tar separation tank (10) in front of the overflow square through hole between cavity two (22) and cavity three (23) flow plate (18a). 6. The garbage pyrolysis tar separation device according to claim 3, characterized in that: said chamber one (21) is welded with a second overflow clapboard groove (15c) on the inner wall close to one side of chamber two (22). ), the cavity two (22) is welded with No. 3 overflow baffle groove (15b) on the inner wall of the side close to the cavity three (23), and the cavity three (23) is welded on the inner wall close to the cavity two (22) side. No. 4 overflow baffle groove (15a), the bottom plates of the overflow baffle grooves (15a), (15b) and (15c) are inclined wall plates to facilitate the outflow of light oil. 7. The garbage pyrolysis tar separation device according to claim 6, characterized in that: between the No. 2 overflow baffle groove (15c) and the separating steel plates of cavity one (21) and cavity two (22), a No. 1 purging port (16c), No. 2 purging port (16b) is set between the No. 3 overflow baffle groove (15b) and the partition steel plates of cavity 2 (22) and cavity 3 (23). There is a No. 3 purge port (16a) between the flow baffle groove (15a) and the separating steel plates of the second cavity (22) and the third cavity (23), wherein the purge port can pass nitrogen or water, and can be purged when passing nitrogen The light oil slick is discharged, and the wall plate can be washed to prevent the accumulation of oil stains when the water is passed. 8. garbage pyrolysis tar separation device as claimed in claim 1, is characterized in that: the top outer side of described pyrolysis oil and gas quenching trap (6) is provided with two purified gas outlets (3), and pyrolysis oil and gas quenching The top of the wall plate of the trap (6) is provided with a water spray head (4), and the inside of the side wall of the pyrolysis oil and gas quenching trap (6) is provided with a No. The side wall of the quenching trap (6) is also connected with a bypass pipeline (27), and the bypass pipeline (27) leads into the tar separation tank (10), and the oil and water gradually accumulated in the oil-gas quenching trap (6) are pyrolyzed. The mixture passes over the No. 1 overflow baffle groove (15d) and flows into the lower tar separation tank (10) through a bypass pipe (27), and a ball valve (7) is arranged in the bypass pipe (27). 9. The garbage pyrolysis tar separation device according to claim 3, characterized in that: the lower part of the pyrolysis oil and gas quenching trap (6) is provided with an oil guiding water pipe (19), and the oil guiding water pipe (19) is provided with In cavity one (21), an overflow basket cover (9) is connected to the lower end of the oil guiding water pipe (19), and a waterproof hammer check valve (8) is arranged inside the overflow basket cover (9). 10. The garbage pyrolysis tar separation device according to claim 3, wherein the tar separation tank (10) is further provided with a liquid level gauge (20) and a thermometer (25), and the liquid level gauge (20) is located at The chamber three (23) is located outside the device on the right side, and the thermometer (25) is located on the outside of the chamber three (23) device near the nozzle (12).

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