Acid tar resource utilization and environment-friendly treatment method

Abstract

The invention discloses an acid tar resource utilization and environment-friendly treatment method which is characterized in that a full-automatic acid tar fishing device is mounted at the top of an ammonium sulfate mother liquor circulating tank, and a conveyor is mounted at the top of the ammonium sulfate mother liquor circulating tank and located on the front surface of the full-automatic acid tar fishing device; the full-automatic acid tar fishing device comprises an acid tar fishing tank, an oil fishing cylinder is installed on the top of the acid tar fishing tank, and an oil fishing connecting rod is arranged at the position, located on the inner side of the acid tar fishing tank, of the bottom of the oil fishing cylinder. The fully-closed, full-flow and full-automatic operation process is used, tail gas in the production process is recycled, and acid tar subjected to hazardous waste treatment is recycled into a tar product for resource utilization, so that the health of operators is prevented from being harmed, transportation equipment is prevented from being damaged, and the production cost is reduced. Meanwhile, the problem of environmental pollution caused in the manual tar fishing operation and transportation process is solved, and a series of environmental protection problems in the coal blending process are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of coking technology and coal gas refining, and specifically relates to a method for resource utilization and environmental protection treatment of acid tar. Background Art

[0002] In the process of producing ammonium sulfate (ammonium sulfate) from coke oven gas, tar droplets and coal powder charcoal entrained in the gas react with ammonium sulfate mother liquor to produce acid tar, which is a complex polymer mixture with a certain viscosity. When the amount of tar entrained in the gas is low, in order to improve the product quality of ammonium sulfate and prevent the ammonium sulfate product from carrying black particles, it is necessary to sample the ammonium sulfate mother liquor, observe the suspended matter, and add tar in time to bind the suspended matter such as coal powder charcoal.

[0003] The acid tar formed by the contact between tar and the sprayed ammonium sulfate mother liquor adheres to the entrained coal powder and coke to form granular suspended matter. Long-term accumulation in the ammonium sulfate production system will cause blockage of the production system. The acid tar entrained in the ammonium sulfate product will also seriously affect the quality of the ammonium sulfate product.

[0004] Patent application No. 02133560.5 discloses a method for treating ammonium sulfate tar. The main measure adopted by the method is to use dilute ammonia water, another by-product of ammonium sulfate production, to neutralize sulfuric acid in ammonium sulfate tar to eliminate the environmental pollution caused by the acid in ammonium sulfate tar, and to recover the tar in ammonium sulfate tar. However, the above method only uses a delivery pump for simple control, and the degree of automation is low, which cannot adapt to modern industrial production. In addition, the existing treatment method is to manually remove the acid tar, and then transport it to the coke oven slag blending device in a slag box, and directly mix it with the tar wet slag and then enter the silo for coal blending. However, the above method is not suitable for modern industrial production. The above method has high labor intensity, and there is dripping during the manual tar fishing operation and transportation, which pollutes the environment. At the same time, the toxicity and acidity of acid tar seriously affect the health of operators and the safe use of transportation equipment. After the tar residue is dried, the acid tar cannot be mixed with the dry tar residue, otherwise it will cause blockage of the silo discharge port. In the process of acid tar blending with coal, it not only causes corrosion damage to equipment and belts, but also has high viscosity and produces lumps when acid tar is blended alone, which requires heating treatment. The odor generated seriously pollutes the environment, which does not meet the current environmental protection production problems. For this reason, we propose a method for resource utilization and environmental protection treatment of acid tar. Summary of the invention

[0005] The object of the present invention is to provide a method for resource utilization and environmental protection treatment of acid tar, so as to solve the problems that the existing treatment methods proposed in the above background technology have high labor intensity, and there is dripping phenomenon during manual tar scooping and transportation, which causes pollution to the environment. At the same time, the toxicity and acidity of acid tar seriously affect the health of operators and the safe use of transportation equipment. After the tar residue is dried, the acid tar cannot be mixed with the dry tar residue, otherwise it will cause the silo discharge port to be blocked. In the process of acid tar blending with coal, not only does it cause corrosion damage to equipment and belts, but also when acid tar is blended alone, the viscosity is high and lumps are generated, and heating treatment is required. The odor generated seriously pollutes the environment, which does not meet the current environmental protection production problems.

[0006] To achieve the above object, the present invention provides the following technical scheme: a method for resource utilization and environmental protection of acid tar, comprising a fully automatic acid tar scooping device, a conveyor, a dilution tank, a gear pump, a tail gas recovery main pipe, a pickling tower and an ammonium sulfate mother liquor circulation tank, and the specific steps are as follows;

[0007] S1, using a fully automatic acid tar scooping device to automatically scoop the acid tar, during the scooping process, the oil scooping cylinder works, and the oil scooping hanging frame on the inner side of the acid tar scooping tank is pushed through the oil scooping connecting rod, and the oil scooping hanging frame is lowered below the liquid surface of the ammonium sulfate mother liquor circulation tank, and after staying for a period of time, it rises, and then the pushing cylinder pushes the pushing plate to move, and the acid tar scooped on the oil scooping hanging frame is sent into the drop pipe through the pushing plate. After the acid tar enters the drop pipe, the scraping cylinder works to push the scraping pushing plate to push the scooped acid tar out from the bottom of the drop pipe, so that the scooped acid tar enters the conveyor, and then flows into the dilution tank through the pipeline of the conveyor;

[0008] S2, the tail gas from the ammonium sulfate mother liquor circulation tank and the dilution tank is connected to the tail gas recovery main pipe through a pipeline, and then connected to the steam injection pump of the ammonia distillation device to enter the gas system;

[0009] S3, first the tar adding port on the top of the dilution tank automatically adds tar to 300mm, the tar pipe shut-off valve is closed, and the tar adding is stopped. Then the steam shut-off valve automatically opens to clean the tar pipe, and the steam shut-off valve is closed after one minute;

[0010] S4, continue to add acid tar to the dilution tank. When the acid tar and ammonia water are mixed into the dilution tank and the liquid level reaches 500mm, the agitator starts. When the liquid level of the dilution tank reaches 900mm and the temperature reaches 70℃, the ammonia water cleaning valve of the dilution tank discharge pipeline automatically opens and the gear pump automatically starts.

[0011] S5, after ten minutes of cleaning, the cleaning valve automatically closes, and the dilution tank discharge valve automatically opens. After being heated, fully neutralized, dispersed, stirred and diluted, the oil is transported to the external tar-ammonia separation device through a gear pump for treatment;

[0012] S6, when the liquid level in the dilution tank drops to 50mm, the dilution tank discharge valve automatically closes and the ammonia cleaning valve automatically opens. After ten minutes of ammonia cleaning, the ammonia cleaning valve automatically closes and the gear pump automatically stops, and the system enters the next cycle of automatic operation.

[0013] Preferably, the fully automatic acid tar scooping device is installed on the top of the ammonium sulfate mother liquor circulation tank, and the conveyor is installed on the top of the ammonium sulfate mother liquor circulation tank and is located on the front surface of the fully automatic acid tar scooping device, the fully automatic acid tar scooping device includes an acid tar scooping tank, the top of the acid tar scooping tank is equipped with an oil scooping cylinder, the bottom of the oil scooping cylinder is located on the inner side of the acid tar scooping tank and is provided with an oil scooping connecting rod, the bottom of the oil scooping connecting rod is installed with a hanging plate, and the bottom of the hanging plate is provided with an oil scooping hanging frame for scooping tar.

[0014] Preferably, positioning seats are installed at both ends of the inner side of the acid tar scooping tank, a limit stopper is arranged on the inner side of the positioning seat, a pushing port is opened on one side of the positioning seat, and a pushing cylinder is installed on the other side of the acid tar scooping tank, and a pushing plate is installed at one end of the pushing cylinder located in the acid tar scooping tank.

[0015] Preferably, a drop pipe is provided on one side of the acid tar scooping tank corresponding to the pushing port, and the drop pipe is connected to the top of the conveyor, a scraper cylinder is installed on the top of the drop pipe, and a scraper push plate is provided on one end of the scraper cylinder located on the inner side of the drop pipe.

[0016] Preferably, the oil recovery hanging frame is pushed up and down by an oil recovery connecting rod, and the oil recovery hanging frame is limited by a limit block when being raised or lowered.

[0017] Preferably, when the oil scooping hanging frame rises to the limit position of the limit stopper, the pushing plate contacts the inner side of the oil scooping hanging frame, and the pushing plate also corresponds to the pushing opening provided on the positioning seat.

[0018] Preferably, when the push plate pushes the tar scooped from the oil scooping frame into the inside of the drop pipe through the push port, the scraper cylinder works to push the scraper push plate to scrape the material and send it into the conveyor.

[0019] Preferably, side baffles are installed on both sides of the oil recovery hanging frame, and limiting guide grooves are provided on the two side surfaces of the oil recovery hanging frame, limiting guide rods are installed in the limiting guide grooves, and return springs are provided on the limiting guide rods. Filter windows are provided on the tops of both ends of the oil recovery hanging frame, and filter nets are installed in the filter windows.

[0020] Preferably, a limiting slider is provided on the inner top of the side baffle, and the side baffle moves in the limiting guide groove through the limiting slider, and the limiting slider is also limited by the limiting guide rod. When the oil recovery hanging frame rises to the positioning seat, the side baffle is pushed down by the positioning seat.

[0021] Preferably, three fully automatic acid tar scooping devices are equidistantly arranged on the top of the ammonium sulfate mother liquor circulation tank, and the three fully automatic acid tar scooping devices are connected to the conveyor through a drop pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By using a fully enclosed, full-flow, fully automatic operation process and recycling tail gas during the production process, the acid tar that has been treated as hazardous waste is recycled into tar products for resource utilization, avoiding harm to the health of operators and damage to transportation equipment, and effectively solving a series of environmental protection problems in the coal blending process;

[0024] (2) At the same time, the problem of environmental pollution caused by manual tar scooping and transportation is also solved. By setting up the automatic scooping structure, the fully automatic acid tar scooping device is used in conjunction with the conveyor. During the tar acid scooping process, no manual operation is required, which reduces the labor intensity of the staff and avoids pollution during the manual scooping process. While the degree of automation is high, the practicability and convenience of the device are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the fully automatic acid tar scooping device of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the oil recovery hanging frame of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the outer net scraper of the present invention;

[0029] Figure 5 It is a schematic diagram of the overall process of the present invention;

[0030] In the figure: 1. Fully automatic acid tar scooping device; 101. Acid tar scooping tank; 102. Oil scooping cylinder; 103. Oil scooping connecting rod; 104. Hanging plate; 105. Positioning seat; 106. Pushing port; 107. Pushing cylinder; 108. Pushing plate; 109. Limiting block; 110. Oil scooping hanging frame; 111. Side baffle; 113. Dropping pipe; 114. Scraping cylinder; 115. Scraping push plate; 116. Filter window; 117. Filter screen; 118. Limit guide groove; 119. Limit guide rod; 120. Limit slider; 121. Return spring; 122. External screen scraper; 123. Scraper spring; 124. Filter screen scraper; 125. Protrusion; 2. Conveyor; 21. DN25 hot ammonia water pipeline feed port; 22. Discharge port; 3. Dilution tank; 4. Gear pump; 5. Tail gas recovery main pipe; 6. Pickling tower; 7. Ammonium sulfate mother liquor circulation tank. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The present invention provides a technical solution: a method for resource utilization and environmental protection of acid tar, comprising a fully automatic acid tar scooping device 1, a conveyor 2, a dilution tank 3, a gear pump 4, an exhaust gas recovery main pipe 5, a pickling tower 6 and an ammonium sulfate mother liquor circulation tank 7; when the fully automatic acid tar scooping device 1 is used to scoop acid tar, the oil scooping cylinder 102 on the top of the acid tar scooping tank 101 works to drive the oil scooping hanging frame 110 to rise and fall, and when the oil scooping hanging frame 110 is immersed in the mother liquor, the acid tar in the liquid can be filtered during the lifting, and the excess liquid is filtered through the filter screen 117 set on the filter window 116 during the lifting, and when the oil scooping hanging frame 110 rises to the positioning seat 105, the positioning seat 105 will squeeze the side baffles 111 on both sides of the oil scooping hanging frame 110. The side baffles 111 are squeezed by the positioning seat 105 and limited by the limiting slider 120 and the limiting guide rod 119 and squeeze the return spring 121. When the top of the oil scooping hanging frame 110 contacts the limiting block 109, it plays a limiting role. At this time, the inner side height of the oil scooping hanging frame 110 is tangent to the pushing plate 108. At the same time, the pushing cylinder 107 pushes the pushing plate 108 at one end to send the acid tar scooped in the oil scooping hanging frame 110 out of the pushing port 106. When the pushing plate 108 is pushed to the inside of the drop pipe 113, the drop pipe 11 The scraper cylinder 114 on the 3 works to push the scraper push plate 115 down, and the acid tar adhered to the push plate 108 and the inner wall of the drop tube 113 is scraped off by the scraper push plate 115 and sent to the conveyor 2, thereby completing a scooping cycle, and when the oil scooping hanging frame 110 works to descend again, the deformed return spring 121 on the limit guide rod 119 pushes the side baffle plate 111 to return and rise, thereby shielding the two sides of the oil scooping hanging frame 110 to prevent the scooped acid tar from flowing out from the two sides when the oil scooping hanging frame 110 is lifted. At the same time, in order to prevent the outer surface of the filter screen 117 on the oil scooping hanging frame 110 from being blocked, a filter 117 on the positioning seat 105 is provided between the positioning seats 105. An outer mesh scraper 122 is also provided. When the oil recovery frame 110 is lifted, the outer surface of the filter 117 can be scraped by the outer mesh scraper 122, so as to achieve a better cleaning effect. A filter scraper 124 connected by a scraper spring 123 is provided on the inner side of the outer mesh scraper 122. The filter scraper 124 can be elastically retracted by the scraper spring 123. When the filter 117 passes through the outer mesh scraper 122, the protrusion 125 on the filter scraper 124 can be inserted into the filter holes on the filter 117 and scrape off the tar blocked in the filter holes to avoid clogging of the filter holes on the filter 117, thereby achieving better filtering use.

[0034] As an embodiment of the present invention, an ammonium sulfate mother liquor circulation tank 7 is arranged on one side of a pickling tower 6, the ammonium sulfate mother liquor circulation tank 7 is provided with three tar scooping ports, a fully automatic acid tar scooping device 1 is arranged on the tar scooping port of the ammonium sulfate mother liquor circulation tank 7, a conveyor 2 is arranged on the side of the fully automatic acid tar scooping device 1, a DN25 hot ammonia water pipeline feed port 21 is arranged at the front end of the conveyor 2, a discharge port 22 is arranged at the end of the conveyor 2, a dilution tank 3 is arranged below the discharge port 22, the discharge port 22 and the dilution tank 3 are vertically connected by a pipeline, an agitator is arranged inside the dilution tank 3, a side shell and a bottom shell of the dilution tank 3 are provided with a heating coil, an acid tar inlet, a tar addition port, an exhaust gas interface and a liquid level meter are arranged on the top of the dilution tank 3, a thermometer is arranged at a position 30 cm below the side of the dilution tank, and an acid tar outlet is arranged at the bottom of the side of the dilution tank 3.

[0035] As an embodiment of the present invention, the pipeline for conveying acid tar is automatically cleaned with ammonia water before and after conveying.

[0036] As an implementation mode of the present invention, the system used in the acid tar resource utilization and environmental protection treatment method is a PLC automatic control system, and the PLC automatic control system is connected to the central control room.

[0037] As an embodiment of the present invention, before the implementation of the acid tar resource utilization and environmental protection treatment method, the acid tar needs to be emulsified. When emulsification occurs, a new demulsifier is added to prevent the acid tar from affecting the tar ammonia separation system.

[0038] As an embodiment of the present invention, the pipelines and equipment used in the acid tar resource utilization and environmental protection treatment method are made of 316L material, in order to prevent the pipeline equipment from leaking and polluting the on-site environment due to the strong corrosive properties of acid tar.

[0039] As an embodiment of the present invention, the resource utilization and environmental protection treatment method of acid tar includes an acid tar scooping and conveying structure and an acid tar dilution and transportation structure. The acid tar scooping and conveying structure and the acid tar dilution and transportation structure have two modes of independent operation and interlocking automatic operation. The acid tar scooping and conveying structure and the acid tar dilution and transportation structure are provided with a manual operating device and a terminal control system.

[0040] As an embodiment of the present invention, the acid tar scooping and conveying structure includes three fully automatic acid tar scooping devices 1 and a conveyor 2. The fully automatic acid tar scooping device 1 is provided with an explosion-proof camera with a light source.

[0041] As an embodiment of the present invention, the dilution and transportation structure of the acid tar includes a dilution tank 3 and a gear pump 4 .

[0042] Specific working principle:

[0043] The resource utilization and environmental protection treatment method of acid tar of the present invention adopts the acid washing tower 6 and saturator process to generate ammonium sulfate.

[0044] Ammonium sulfate production mostly adopts the pickling tower 6 and saturator process. Since the ammonium sulfate mother liquor circulation tank 7 used in the pickling tower 6 process has at least three acid tar removal ports, three sets of acid tar removal devices are required to remove the acid tar. Therefore, the design invention of fully automatic closed removal of acid tar from the ammonium sulfate mother liquor circulation tank 7 has always been a difficult problem in the coking industry. The full flow tank process used in the saturator process is relatively simple. As long as the mother liquor circulation tank process is solved, the full flow tank can use a set of fully automatic acid tar removal devices 1 to solve this kind of problem.

[0045] In order to prevent the explosion-proof camera on the fully automatic acid tar scooping device 1 from fogging, a small amount of nitrogen can be added for cleaning. The explosion-proof camera can detect the state of acid tar floating on the ammonium sulfate mother liquor, and at the same time observe whether the acid tar scooping and oil pushing processes are normal. The explosion-proof camera is installed at the bottom of the positioning seat 105 for real-time monitoring. The fully automatic acid tar scooping device 1 is provided with two speed modes, namely, a fast gear of fifteen minutes and a slow gear of thirty minutes. The fully automatic acid tar scooping device 1 generally uses the slow gear for automatic operation. When there is a lot of acid tar on the liquid surface, it can be adjusted to the fast gear.

[0046] This method uses a flow meter and a regulating valve to control the amount of ammonia water added in each round, that is, the flow rate of the dilution tank 3 at a liquid level of 300 mm, and the calculation amount is about 0.5 m 3 The regulating valve is automatically closed when the conveyor 2 is turned on, and the ammonia regulating valve is automatically opened when the next cycle comes. On the one hand, the acid tar and ammonia water taken out undergo a neutralization reaction in the conveyor 2. On the other hand, due to the temperature and good lubricity of the hot ammonia water, the risk of material accumulation and blockage of the feed pipe in the conveyor 2 can be effectively prevented, and the consumption of heating steam is reduced, saving energy.

[0047] The purpose of adding ammonia water in this method is to ensure that the pH of the diluted acid tar is 7-8, and the purpose of heating to 70°C is to increase the fluidity of the acid tar and fully cause the neutralization reaction; considering the adhesiveness of the acid tar, appropriately adding tar to the dilution tank 3 can effectively reduce the viscosity of the acid tar and avoid blockage of equipment and pipelines.

[0048] In the production process of an enterprise, when the amount of tar entrained in the coal gas is low and tar needs to be added to the mother liquor circulation tank to bind suspended matter such as coal powder and coke, the system generally needs to be shut down for about eight hours. The central control personnel can manually fish out the gas through the camera to check the operation and put the system into automatic operation according to the bonding condition of the acid tar.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for resource utilization and environmental protection of acid tar, characterized in that: The invention comprises a fully automatic acid tar scooping device (1), a conveyor (2), a dilution tank (3), a gear pump (4), a tail gas recovery main pipe (5), a pickling tower (6) and an ammonium sulfate mother liquor circulation tank (7), and the specific steps are as follows; S1, using a fully automatic acid tar scooping device (1) to automatically scoop acid tar, during the scooping process, the oil scooping cylinder (102) works, and the oil scooping hanging frame (110) inside the acid tar scooping tank (101) is pushed by the oil scooping connecting rod (103), the oil scooping hanging frame (110) descends below the liquid surface of the ammonium sulfate mother liquid circulation tank (7), and after staying for a period of time, rises, and then the pushing plate (107) is pushed by the pushing cylinder (107). 8) action, the acid tar scooped from the oil scooping frame (110) is sent into the drop pipe (113) through the push plate (108); after the acid tar enters the drop pipe (113), the scraper cylinder (114) works to push the scraper push plate (115) to push the scooped acid tar out from the bottom of the drop pipe (113), so that the scooped acid tar enters the conveyor (2), and then flows into the dilution tank (3) through the pipeline of the conveyor (2); S2, the tail gas from the ammonium sulfate mother liquor circulation tank (7) and the dilution tank (3) is connected to the tail gas recovery main pipe (5) through a pipeline, and then connected to the steam injection pump of the ammonia distillation device to enter the gas system; S3, first, the tar adding port at the top of the dilution tank (3) automatically adds tar to 300 mm, the tar pipe shut-off valve is closed, and the tar adding is stopped. Then the steam shut-off valve automatically opens to clean the tar pipe, and the steam shut-off valve is closed after one minute; S4, continue to add acid tar to the dilution tank (3), when the acid tar and ammonia water are mixed into the dilution tank (3) and the liquid level reaches 500mm, the agitator is started, when the liquid level of the dilution tank (3) reaches 900mm and the temperature reaches 70°C, the ammonia water cleaning valve of the dilution tank (3) outlet pipeline is automatically opened, and the gear pump (4) is automatically started; S5, after ten minutes of cleaning, the cleaning valve automatically closes, the discharge valve of the dilution tank (3) automatically opens, and after being heated, fully neutralized, dispersed, stirred and diluted, the tar is transported to the external tar-ammonia separation device through the gear pump (4) for treatment; S6, when the liquid level in the dilution tank (3) drops to 50 mm, the discharge valve of the dilution tank (3) is automatically closed, and the ammonia cleaning valve is automatically opened. After ten minutes of ammonia cleaning, the ammonia cleaning valve is automatically closed, and the gear pump (4) is automatically stopped, and the system enters the next cycle of automatic operation.

2. The method for resource utilization and environmental protection of acid tar according to claim 1, characterized in that: The fully automatic acid tar scooping device (1) is installed on the top of an ammonium sulfate mother liquor circulation tank (7), and the conveyor (2) is installed on the top of the ammonium sulfate mother liquor circulation tank (7) and is located on the front surface of the fully automatic acid tar scooping device (1). The fully automatic acid tar scooping device (1) comprises an acid tar scooping tank (101), an oil scooping cylinder (102) is installed on the top of the acid tar scooping tank (101), an oil scooping connecting rod (103) is arranged at the bottom of the oil scooping cylinder (102) located inside the acid tar scooping tank (101), a hanging plate (104) is installed at the bottom of the oil scooping connecting rod (103), and an oil scooping hanging frame (110) for scooping tar is arranged at the bottom of the hanging plate (104).

3. The method for resource utilization and environmental protection of acid tar according to claim 2, characterized in that: Positioning seats (105) are installed at both ends of the inner side of the acid tar scooping tank (101), and a limit stopper (109) is arranged on the inner side of the positioning seat (105). A pushing port (106) is opened on one side of the positioning seat (105), and a pushing cylinder (107) is installed on the other side of the acid tar scooping tank (101), and a pushing plate (108) is installed at one end of the pushing cylinder (107) located in the acid tar scooping tank (101).

4. The method for resource utilization and environmental protection of acid tar according to claim 2, characterized in that: A material dropping pipe (113) is provided at a position corresponding to the pushing port (106) on one side of the acid tar scooping tank (101), and the material dropping pipe (113) is connected to the top of the conveyor (2). A scraping cylinder (114) is installed on the top of the material dropping pipe (113), and a scraping pushing plate (115) is provided at one end of the scraping cylinder (114) located on the inner side of the material dropping pipe (113).

5. The method for resource utilization and environmental protection of acid tar according to claim 4, characterized in that: The oil recovery hanging frame (110) is pushed up and down by the oil recovery connecting rod (103), and the oil recovery hanging frame (110) is limited by the limit stopper (109) when it is being raised or lowered.

6. The method for resource utilization and environmental protection of acid tar according to claim 5, characterized in that: When the oil recovery hanging frame (110) rises to the limit position of the limit stopper (109), the push plate (108) contacts the inner side of the oil recovery hanging frame (110), and the push plate (108) also corresponds to the push opening (106) provided on the positioning seat (105).

7. The method for resource utilization and environmental protection of acid tar according to claim 6, characterized in that: When the push plate (108) pushes the tar scooped from the oil scooping hanging frame (110) into the inside of the drop pipe (113) through the push port (106), the scraping cylinder (114) works to push the scraping push plate (115) to scrape the material and send it into the conveyor (2).

8. The method for resource utilization and environmental protection of acid tar according to claim 2, characterized in that: Side baffles (111) are installed on both sides of the oil recovery hanging frame (110), and limiting guide grooves (118) are provided on both side surfaces of the oil recovery hanging frame (110), limiting guide rods (119) are installed in the limiting guide grooves (118), and a return spring (121) is provided on the limiting guide rod (119), and filter windows (116) are provided at the tops of both ends of the oil recovery hanging frame (110), and filter nets (117) are installed in the filter windows (116).

9. The method for resource utilization and environmental protection of acid tar according to claim 8, characterized in that: A limiting slider (120) is arranged on the inner top of the side baffle (111), and the side baffle (111) moves in the limiting guide groove (118) via the limiting slider (120), and the limiting slider (120) is also penetrated and limited by the limiting guide rod (119). When the oil recovery hanging frame (110) rises to the positioning seat (105), the positioning seat (105) pushes the side baffle (111) to descend.

10. The method for resource utilization and environmental protection of acid tar according to claim 8, characterized in that: Three fully automatic acid tar scooping devices (1) are equidistantly arranged on the top of the ammonium sulfate mother liquor circulation tank (7), and the three fully automatic acid tar scooping devices (1) are all connected to the conveyor (2) through a drop pipe (113).

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