System for co-processing hazardous liquid waste in a cement kiln

Abstract

The application discloses a system for co-processing hazardous waste liquid in a cement kiln, which sequentially comprises a liquid taking device, a double vacuum tank conveying device and a cement kiln atomization spraying device; wherein the liquid taking device comprises a liquid taking gun; the double vacuum tank conveying device comprises an upper vacuum tank group, a lower vacuum tank group, a vacuum pump group, a compressed air pipeline and a vacuum pipeline; the upper vacuum tank group and the lower vacuum tank group are both provided with a hazardous waste liquid inlet, a hazardous waste liquid outlet, a compressed air inlet and an exhaust port; the vacuum pump group is connected with the vacuum exhaust port of the upper vacuum tank group through the vacuum pipeline; the compressed air pipeline is connected with an external compressed air tank through a compressed air pump at the air inlet end, and is connected with the compressed air inlets of the upper vacuum tank group and the lower vacuum tank group at the air outlet end; the hazardous waste liquid inlet of the upper vacuum tank group is connected with the liquid taking gun to suck the waste liquid in a waste liquid tank; the hazardous waste liquid outlet of the upper vacuum tank group is connected with the hazardous waste liquid inlet of the lower vacuum tank group through a connecting pipeline; the hazardous waste liquid outlet of the lower vacuum tank group is connected with the cement kiln atomization spraying device; and the cement kiln atomization spraying device comprises a conveying pipeline and a high-pressure pump, a filtering device and a spray gun arranged on the conveying pipeline; the waste liquid in the lower vacuum tank group is pumped to the kiln tail of the cement kiln through the high-pressure pump, is atomized through the spray gun and is sprayed into the lower part of a C4 cyclone.

Description

Technical Field

[0001] This invention relates to a system for co-processing hazardous waste liquid in cement kilns. Background Technology

[0002] With the development of society and the economy, solid waste pollution has become increasingly serious, and society is paying more and more attention to the prevention and control of solid waste pollution. Among them, hazardous waste, as the most difficult part of solid waste to dispose of, has become an important factor restricting economic development. In the pretreatment process of hazardous waste, problems often arise where hazardous waste liquids in drums or other containers are difficult to extract completely and transfer to hazardous waste liquid treatment facilities due to the precipitation of impurities. This is because the waste liquid contains a large amount of impurities (solid content of 10%), which will settle at the bottom of the container after a long period of settling, making it difficult to extract completely. The extraction and transportation of such hazardous waste liquids has become a difficult point in the hazardous waste liquid treatment process. At present, the extraction and transportation of such hazardous waste liquids mainly use diaphragm pumps or centrifugal pumps. Hazardous waste liquids with high impurity content have a significant impact on the stable operation of pumps. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a system for co-processing hazardous waste liquid in cement kilns. This system can achieve continuous transportation of hazardous waste liquid with high impurity content, and can also effectively reduce the impact of hazardous waste liquid on the temperature of the decomposition furnace when it enters the incinerator, thereby reducing the impact on kiln output.

[0004] Technical Solution: The system for co-processing hazardous waste liquid in a cement kiln according to the present invention comprises, in sequence, a liquid extraction device, a double vacuum tank conveying device, and a cement kiln atomizing spray device; wherein, the liquid extraction device includes a liquid extraction gun; the double vacuum tank conveying device includes an upper vacuum tank, a lower vacuum tank, a vacuum pump unit, a compressed air pipeline, and a vacuum extraction pipeline; both the upper and lower vacuum tanks are provided with a hazardous waste liquid inlet, a hazardous waste liquid outlet, a compressed air inlet, and an exhaust outlet; the vacuum pump unit is connected to the vacuum extraction port of the upper vacuum tank via the vacuum extraction pipeline; the air inlet of the compressed air pipeline is connected to an external compressed air tank via a compressed air pump. The compressed air pipeline outlet is connected to the compressed air inlets of the upper and lower tanks of the vacuum tank assembly, respectively. The hazardous waste liquid inlet of the upper tank of the vacuum tank assembly is used to draw waste liquid from the tank to be extracted through a liquid-taking gun. The hazardous waste liquid outlet of the upper tank of the vacuum tank assembly is connected to the hazardous waste liquid inlet of the lower tank of the vacuum tank assembly through a connecting pipe. The hazardous waste liquid outlet of the lower tank of the vacuum tank assembly is connected to the cement kiln atomizing spray device. The cement kiln atomizing spray device includes a conveying pipeline and a high-pressure pump, a filter device, and a spray gun installed on the conveying pipeline. The waste liquid in the lower tank of the vacuum tank assembly is pumped to the kiln tail of the cement kiln by the high-pressure pump, and sprayed into the lower part of the C4 cyclone after being atomized by the spray gun.

[0005] The liquid dispensing gun is equipped with a flexible suction cup at its bottom. The flexible suction cup is conical with a bottom diameter ≤120mm and a cone height ≥100mm. (The liquid dispensing device used in this invention is based on the existing liquid dispensing device (application number 201921485635X), with a flexible suction cup at the bottom of the dispensing gun and a camera mounted on a bracket. The camera is positioned facing the container and is used to observe whether there is any residue at the bottom of the container.)

[0006] The system also includes a compressed air agitation mechanism, which comprises air pipes and agitator nozzles extending in four directions at the ends of the air pipes. The air pipes are fixed to the drive end of a lifting mechanism via an adapter plate. The lifting mechanism is fixed to the ground. After the ton container is opened, the air pipes are inserted into the waste liquid via the lifting mechanism. The pneumatic valve on the compressed air pipe is opened to input compressed air, causing the waste liquid to mix evenly and reducing sediment at the bottom of the ton container. The bottom of the container is agitated pneumatically for at least 2 minutes. After agitation, the compressed air valve is closed, and then the sampling gun is inserted into the waste liquid in the ton container. Compressed air is sprayed in four directions through the agitator nozzles to achieve wide-area agitation, thereby effectively reducing sediment at the bottom of the ton container. The compressed air pressure used is ≥0.4 MPa, and the compressed air agitation time is ≥2 minutes.

[0007] The upper tank of the vacuum tank assembly is equipped with valves at the hazardous waste liquid inlet, hazardous waste liquid outlet, compressed air inlet, exhaust outlet, and vacuum extraction outlet, namely, an inlet valve, an outlet valve, an air inlet valve, an exhaust valve, and an exhaust valve, respectively. The lower tank of the vacuum tank assembly is also equipped with valves at the hazardous waste liquid outlet, compressed air inlet, and exhaust outlet, namely, an outlet pneumatic valve, an air inlet pneumatic valve, and an exhaust pneumatic valve, respectively. The upper tank volume of the vacuum tank assembly is ≥2m³. 3 The volume of the lower tank of the vacuum tank assembly shall not be less than twice the volume of the upper tank. All pneumatic valves are driven by compressed air.

[0008] The upper and lower tanks of the vacuum tank assembly are also equipped with pressure gauges and thermometers; the exhaust ports on the upper and lower tanks of the vacuum tank assembly are respectively connected to deodorization pipes.

[0009] The cement kiln atomizing spray device includes a conveying pipeline. One end of the conveying pipeline is connected to the hazardous waste liquid outlet of the lower tank of the vacuum tank group, and the other end is connected to two C4 cyclones at the tail of the cement kiln. A basket filter, a high-pressure pump, a bag filter, and a spray gun are sequentially installed on the conveying pipeline. A flow meter is also installed on the conveying pipeline. The basket filter is connected before the high-pressure pump of the cement kiln atomizing spray device, and the bag filter is connected after the high-pressure pump.

[0010] The cement kiln atomizing spraying device sprays waste liquid into the lower part of two C4 cyclones at the kiln tail, with two oppositely arranged spray guns installed at the lower part of each C4 cyclone. Compared to directly injecting waste liquid into the decomposition furnace, injecting waste liquid at the lower part of the C4 cyclone effectively avoids the temperature fluctuations in the decomposition furnace caused by directly injecting waste liquid into the furnace, which leads to a decrease in kiln output. When the direct injection rate in the decomposition furnace is ≥2t / h, the temperature fluctuation inside the decomposition furnace is ≥±10℃, and the kiln output decreases by more than 5%. Moreover, the temperature reached by the waste liquid injected into the C4 cyclone is higher than that of the cyclone after injection into C3. The temperature of the C4 cyclone reaches ≥850℃, while the temperature of the C3 cyclone is ≤700℃. Therefore, injecting waste liquid into the C4 cyclone can achieve rapid decomposition of the waste liquid, allowing it to be fully mixed with the raw materials before entering the middle of the decomposition furnace, greatly reducing the temperature fluctuation of the decomposition furnace. When the waste liquid is symmetrically injected into the C4 cyclone with a treatment rate of ≥2t / h, the temperature change in the decomposition furnace is ≤±3℃, and the kiln output reduction rate is ≤3%.

[0011] It also includes a PLC control box, a liquid extraction device, a vacuum pump group, a compressed air pump, a pressure gauge, a thermometer, a lifting mechanism, and various pneumatic valves, all of which are connected to the PLC control box via cables.

[0012] Beneficial effects: This invention utilizes a lifting compressed air agitator to reduce sediment at the bottom of the IBC container before liquid extraction. Combined with a suction cup structure at the end of the extraction gun, it achieves over 99% effective extraction of hazardous waste liquid with a solids content of 10% (i.e., complete extraction of waste liquid from the bottom of the container). Furthermore, the use of a dual-vacuum tank filling and emptying system effectively ensures the operational stability of the hazardous waste liquid disposal system. The only interruption in the upper tank is the emptying time; extraction can continue at other times, greatly improving extraction efficiency. This allows for the extraction of waste liquid from a single IBC standard container (with a volume of 1m³ per container). 3 The liquid collection time is ≤5min. Finally, the hazardous waste liquid is pumped to the kiln tail by a high-pressure pump and sprayed into the two rows of C4 cyclones of the cement kiln through a spray gun. Each row of cyclones has two spray points. On the one hand, it improves the treatment effect of the waste liquid (high temperature, fast decomposition speed, and fast reaction), and on the other hand, it greatly reduces the temperature fluctuation of the decomposition furnace and avoids the decline in kiln output. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structural principle of the cement kiln co-processing hazardous waste liquid system of the present invention;

[0014] Figure 2 A schematic diagram of a structure with a flexible suction cup at the end of a liquid dispensing gun;

[0015] Figure 3 This is a schematic diagram of the compressed air mixing mechanism;

[0016] Figure 4 This is a bottom view of the mixing nozzle at the end of the air duct. Detailed Implementation

[0017] like Figures 1-4 As shown, the system for co-processing hazardous waste liquid in a cement kiln according to the present invention includes, in sequence, a liquid extraction device, a double vacuum tank conveying device, and a cement kiln atomizing spray device; wherein, the liquid extraction device 35 includes a liquid extraction gun 41; the double vacuum tank conveying device includes an upper vacuum tank 15, a lower vacuum tank 21, a vacuum pump group 29, a compressed air pipeline 31, and a vacuum extraction pipeline 32; both the upper vacuum tank 15 and the lower vacuum tank 21 are provided with a hazardous waste liquid inlet, a hazardous waste liquid outlet, a compressed air inlet, and an exhaust outlet; the vacuum pump group 29 is connected to the vacuum extraction port of the upper vacuum tank 15 through the vacuum extraction pipeline 32; the air inlet of the compressed air pipeline 31 is connected to an external compressed air tank through a compressed air pump, and the air outlet of the compressed air pipeline 31 is connected to the compressed air inlets of the upper vacuum tank 15 and the lower vacuum tank 21, respectively. The hazardous waste liquid inlet of the upper tank 15 of the vacuum tank group is drawn from the waste liquid tank to be extracted by the liquid extraction gun 41 (a one-way valve 7, a manual valve 8 and a pneumatic valve 9 are installed in sequence on the connecting pipe between the liquid extraction gun 41 and the upper tank 15 of the vacuum tank group to ensure that the waste liquid does not flow back. During normal operation, the manual valve 8 is in the normally open state and is closed when the equipment is under maintenance). The hazardous waste liquid outlet of the upper tank 15 of the vacuum tank group is connected to the hazardous waste liquid inlet of the lower tank 21 of the vacuum tank group through a connecting pipe. The hazardous waste liquid outlet of the lower tank 21 of the vacuum tank group is connected to the cement kiln atomizing spray device. The cement kiln atomizing spray device includes a conveying pipe 33 and a high-pressure pump 25, a filter device and a spray gun 28 installed on the conveying pipe. The waste liquid in the lower tank 21 of the vacuum tank group is pumped to the kiln tail of the cement kiln by the high-pressure pump 25 and sprayed into the lower part of the C4 cyclone after being atomized by the spray gun 28.

[0018] The liquid dispensing gun 41 is equipped with a flexible suction cup 42 at its bottom. The flexible suction cup 42 is conical, with a bottom diameter of ≤120mm and a height of ≥100mm. The flexible suction cup 42 allows the liquid dispensing gun 41 to reach the bottom of the container, preventing damage to the gun itself and ensuring complete extraction of waste liquid from the bottom.

[0019] The system for co-processing hazardous waste liquid in a cement kiln according to the present invention also includes a compressed air stirring mechanism. The compressed air stirring mechanism includes an air pipe 43 and stirring nozzles 44 extending in four directions at the end of the air pipe 43. The air pipe 43 is fixed to the drive end 48 of the lifting mechanism 46 via an adapter plate 45. The lifting mechanism 46 is fixed to the ground. After the ton container is opened, the air pipe 43 is inserted into the waste liquid through the lifting mechanism 46. The pneumatic valve 47 on the compressed air pipe 43 is opened to input compressed air, so that the waste liquid is mixed evenly and the sediment at the bottom of the ton container is reduced. The bottom of the container is pneumatically stirred for no less than 2 minutes. After stirring, the compressed air is turned off, and then the liquid sampling gun 41 is inserted into the waste liquid in the ton container. The compressed air is sprayed in four directions through the stirring nozzles 44 to achieve large-scale stirring. The pressure of the compressed air used is ≥0.4 MPa, and the compressed air stirring time is ≥2 minutes. Before inserting the liquid extraction gun 41 into the waste liquid in the ton container, first open the pneumatic valve 47 on the compressed air pipeline 43 to input compressed air, so that the waste liquid is mixed evenly and the sediment at the bottom of the ton container is reduced. With the help of the suction cup 42 set at the end of the liquid extraction gun 41, the liquid extraction gun 41 can be extended into the bottom of the container to completely extract the waste liquid at the bottom of the container.

[0020] Vacuum tank assembly upper tank 15 is equipped with valves at the hazardous waste liquid inlet, hazardous waste liquid outlet, compressed air inlet, exhaust outlet, and vacuum extraction outlet, namely inlet valve 9, outlet valve 16, air inlet valve 12, exhaust valve 10, and exhaust valve 11; vacuum tank assembly lower tank 21 is also equipped with valves at the hazardous waste liquid outlet, compressed air inlet, and exhaust outlet, namely outlet pneumatic valve 23, air inlet pneumatic valve 17, and exhaust pneumatic valve 18; the volume of vacuum tank assembly upper tank 15 is ≥2m³. 3 The volume of the lower tank 21 of the vacuum tank assembly is not less than twice the volume of the upper tank. Specifically, the upper tank 15 of the vacuum tank assembly is equipped with a hazardous waste liquid inlet and its pneumatic valve 9, a vacuum extraction port and its pneumatic valve 11, an exhaust port and its pneumatic valve 10, and a compressed air inlet and its pneumatic valve 12 at the top, and a hazardous waste liquid outlet and its pneumatic valve 16 at the bottom. The lower tank 21 of the vacuum tank assembly is equipped with an inlet, a compressed air inlet and its pneumatic valve 17, and an exhaust port and its pneumatic valve 18 at the top, and a hazardous waste liquid outlet and its pneumatic valve 23, and a sewage outlet and its manual valve 22 at the bottom.

[0021] Pressure gauges (13, 19) and thermometers (14, 20) are also installed on the upper tank 15 and lower tank 21 of the vacuum tank assembly. The thermometers and pressure gauges are used to monitor the pressure and temperature inside the tanks in real time. The exhaust ports of the upper tank 15, lower tank 21, and vacuum pump assembly 29 are connected to the deodorization duct 30. The deodorization adopts a negative pressure collection and treatment system, and the duct maintains negative pressure to ensure effective collection and centralized treatment of waste gas inside the tanks.

[0022] The cement kiln atomizing spraying device includes a conveying pipe 33. One end of the conveying pipe 33 is connected to the hazardous waste liquid outlet of the lower tank 21 of the vacuum tank group, and the other end is connected to two C4 cyclones at the tail of the cement kiln. A basket filter 24, a high-pressure pump 25, a bag filter 26, and a spray gun 28 are sequentially installed on the conveying pipe 33. A flow meter 27 is also installed on the conveying pipe 33. The basket filter 24 connected before the high-pressure pump 25 of the cement kiln atomizing spraying device performs coarse filtration of the waste liquid to avoid clogging of the high-pressure pump 25 and subsequent pipes. The bag filter 26 connected after the high-pressure pump 25 further filters and removes some larger particulate impurities to avoid clogging of the conveying pipe 33 and the spray gun 28. The spray gun 28 of the cement kiln atomizing spraying device atomizes the waste liquid and sprays it into the lower part of the two C4 cyclones at the tail of the cement kiln for incineration. Two spray guns 28 are installed at the lower part of each C4 cyclone. The spray guns 28 are installed opposite each other to ensure that the waste liquid is sprayed in a uniform distribution and to avoid uneven heating in the C4 cyclone when spraying from one side, which would affect the pyrolysis efficiency of the waste liquid.

[0023] The cement kiln co-processing hazardous waste liquid system of the present invention also includes a PLC control box, a liquid sampling device, a vacuum pump group 29, a compressed air pump, a pressure gauge, a thermometer, a lifting mechanism 46, and various pneumatic valves (all pneumatic valves are powered by compressed air), which are respectively connected to the PLC control box via cables.

[0024] The system of this invention uses a double vacuum tank assembly arranged vertically. The upper tank 15 of the vacuum tank assembly is the filling system, and the lower tank 21 of the vacuum tank assembly is the discharging system. The lower tank 21 of the vacuum tank assembly is connected to the terminal liquid-using device. The vacuum pump assembly 29 is the power source for the vacuum extraction device and is connected to the upper tank 15 of the vacuum tank assembly. After the vacuum pump assembly 29 is started, the upper tank 15 of the vacuum tank assembly is evacuated to a vacuum. Waste liquid is drawn from the ton container into the upper tank 15 of the vacuum tank assembly through the liquid-taking gun 41. Then, the suction valve 11 is closed and the discharge valve is opened. Vacuum valve 10 is used to bring the upper tank 15 of the vacuum tank group to a normal pressure state. The exhaust valve 18 of the lower tank of the vacuum tank group is opened to bring the lower tank 21 of the vacuum tank group to a normal pressure state. The liquid outlet valve 16 is opened to transfer the waste liquid to the lower tank 21 of the vacuum tank group. After the transfer is complete, the liquid outlet valve 16 is closed and the liquid outlet valve 23 of the lower tank 21 of the vacuum tank group is opened. The external terminal processing equipment continuously draws liquid from the lower tank 21 of the vacuum tank group. At this time, the upper tank 15 of the vacuum tank group starts the next round of liquid pumping process, thereby realizing the continuous operation of the entire system.

[0025] When the outlet valve 16 of the upper tank 15 of the vacuum tank assembly is opened, the upper tank 15 is connected to the lower tank 21. When the waste liquid in the upper tank 15 is not drained smoothly, the compressed air pump and the compressed air inlet valve 12 of the upper tank 15 are activated to provide positive pressure to the upper tank 15, ensuring that the waste liquid flows smoothly into the lower tank 21. When the outlet valve 16 of the upper tank 15 is closed, the upper tank 15 is disconnected from the lower tank 21. When the waste liquid in the lower tank 21 is not drained smoothly into the subsequent system, the compressed air pump and the compressed air inlet valve 17 of the lower tank 21 are activated to provide positive pressure to ensure that the waste liquid enters the subsequent treatment system.

[0026] The system of this invention is capable of handling single-tank waste liquid (waste liquid volume is 1m³). 3 The liquid extraction time is ≤5min, and the extraction rate of standard IBC tanks is over 95%. For hazardous waste liquid with a solid content of 10%, the effective extraction rate is over 99% (i.e., the waste liquid at the bottom of the tank can be completely extracted). At the same time, the cement kiln waste liquid treatment capacity is ≥2t / h, the temperature change of the decomposition furnace is ≤±3℃, and the kiln output reduction rate is ≤3%.

Claims

1. A system for co-processing hazardous waste liquid in a cement kiln, characterized in that: The system includes, in sequence, a liquid extraction device, a double vacuum tank conveying device, and a cement kiln atomizing spraying device; wherein, the liquid extraction device includes a liquid extraction gun (41); the double vacuum tank conveying device includes an upper vacuum tank (15), a lower vacuum tank (21), a vacuum pump group (29), a compressed air pipeline (31), and a vacuum extraction pipeline (32); both the upper vacuum tank (15) and the lower vacuum tank (21) are equipped with a hazardous waste liquid inlet, a hazardous waste liquid outlet, a compressed air inlet, and an exhaust outlet; the vacuum pump group (29) is connected to the vacuum extraction port of the upper vacuum tank (15) through the vacuum extraction pipeline (32); the air inlet of the compressed air pipeline (31) is connected to an external pressure pump through a compressed air pump. The compressed air tank is connected, and the outlet of the compressed air pipeline (31) is connected to the compressed air inlet of the upper tank (15) and the lower tank (21) of the vacuum tank group respectively; the hazardous waste liquid inlet of the upper tank (15) of the vacuum tank group is used to draw the waste liquid in the waste liquid tank to be extracted through the liquid extraction gun (41), and the hazardous waste liquid outlet of the upper tank (15) of the vacuum tank group is connected to the hazardous waste liquid inlet of the lower tank (21) of the vacuum tank group through the connecting pipe, and the hazardous waste liquid outlet of the lower tank (21) of the vacuum tank group is connected to the cement kiln atomizing spray device; the cement kiln atomizing spray device includes a conveying pipeline (33) and a high-pressure pump (25), a filter device and a spray gun (28) installed on the conveying pipeline, and the lower tank (21) of the vacuum tank group is connected to the cement kiln atomizing spray device. 21) The waste liquid inside is pumped to the tail of the cement kiln by a high-pressure pump (25), and sprayed into the lower part of the C4 cyclone after being atomized by a spray gun (28); the bottom of the liquid collection gun (41) is provided with a flexible suction cup (42), which is conical with a bottom diameter ≤120mm and a height ≥100mm; it also includes a compressed air stirring mechanism, which includes an air pipe (43) and stirring nozzles (44) extending in four directions at the end of the air pipe (43). The air pipe (43) is fixed to the drive end (48) of the lifting mechanism (46) by a transition plate (45). The lifting mechanism (46) is fixed on the ground. After the ton container is opened, it is lifted by the lifting mechanism. (46) Insert the air pipe (43) into the waste liquid, open the pneumatic valve (47) on the compressed air pipe, input compressed air, and mix the waste liquid evenly; the compressed air is sprayed in four directions through the stirring nozzle (44), the pressure of the compressed air used is ≥0.4Mpa, the stirring time of the compressed air is ≥2min, before the liquid taking gun (41) is inserted into the ton barrel of waste liquid, first open the pneumatic valve (47) on the compressed air pipe (43), input compressed air, and mix the waste liquid evenly; the spray gun (28) of the cement kiln atomizing spray device atomizes the waste liquid and sprays it into the lower part of the two C4 cyclones at the kiln tail of the cement kiln, and two spray guns (28) are installed at the lower part of each C4 cyclone.

2. The system for co-processing hazardous waste liquid in a cement kiln according to claim 1, characterized in that: The upper tank (15) of the vacuum tank assembly is equipped with valves at the hazardous waste liquid inlet, hazardous waste liquid outlet, compressed air inlet, exhaust outlet, and vacuum extraction outlet, namely, liquid inlet valve (9), liquid outlet valve (16), air inlet valve (12), exhaust outlet valve (10), and air outlet valve (11); the lower tank (21) of the vacuum tank assembly is also equipped with valves at the hazardous waste liquid outlet, compressed air inlet, and exhaust outlet, namely, liquid outlet pneumatic valve (23), air inlet pneumatic valve (17), and exhaust outlet pneumatic valve (18); the upper tank (15) of the vacuum tank assembly has a volume ≥ 2m³. 3 The volume of the lower tank (21) of the vacuum tank assembly shall not be less than twice the volume of the upper tank.

3. The system for co-processing hazardous waste liquid in a cement kiln according to claim 1, characterized in that: Pressure gauges and thermometers are also provided on the upper tank (15) and lower tank (21) of the vacuum tank assembly; the exhaust ports on the upper tank (15) and lower tank (21) of the vacuum tank assembly are respectively connected to the deodorization pipe (30).

4. The system for co-processing hazardous waste liquid in a cement kiln according to claim 1, characterized in that: The cement kiln atomizing spray device includes a conveying pipe (33), one end of which is connected to the hazardous waste liquid outlet of the lower tank (21) of the vacuum tank group, and the other end is connected to two C4 cyclones at the tail of the cement kiln; a basket filter (24), a high-pressure pump (25), a bag filter (26) and a spray gun (28) are sequentially installed on the conveying pipe (33); a flow meter (27) is also installed on the conveying pipe (33).

5. The system for co-processing hazardous waste liquid in a cement kiln according to claim 1, characterized in that: It also includes a PLC control box, a liquid extraction device, a vacuum pump group (29), a compressed air pump, a pressure gauge, a thermometer, a lifting mechanism (46), and various pneumatic valves, which are connected to the PLC control box via cables.

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