A rotary kiln feeding chain system for solving solid-liquid mixed multi-source hazardous waste

Abstract

The application discloses a rotary kiln feeding chain system for solving solid-liquid mixed multi-source hazardous waste, and relates to the technical field of hazardous waste treatment. The solid-liquid mixture pretreatment system comprises a slag outlet and a first liquid outlet; the solid feeding system is connected with the slag outlet at the upper end and is communicated with the rotary kiln at the lower end; the dilute hazardous waste liquid pretreatment system is connected with the first liquid outlet and comprises a first volatile outlet and a second liquid outlet, wherein the first volatile outlet is connected with the rotary kiln through a combustion-supporting waste gas pipeline, and the second liquid outlet is communicated with the rotary kiln; the viscous hazardous waste liquid pretreatment system comprises a second volatile outlet and a third liquid outlet, wherein the second volatile outlet is communicated with the combustion-supporting waste gas pipeline, and the third liquid outlet is communicated with the rotary kiln; the feeding chain system effectively improves the efficiency of the rotary kiln in treating hazardous waste and reduces the loss of the rotary kiln and various components in the system.

Description

Technical Field

[0001] This invention belongs to the field of hazardous waste treatment technology, and more specifically, relates to a rotary kiln feeding chain system for solving the problem of multi-source hazardous waste with solid-liquid mixtures. Background Technology

[0002] With the continuous development of industrial technology, the amount of industrial waste generated is soaring, thus promoting the rapid development of the industrial hazardous waste treatment industry. In the industrial hazardous waste treatment industry, rotary kilns are widely used due to their strong applicability, relatively simple process, and ease of operation. However, the application of rotary kilns for hazardous waste treatment also presents some practical problems. Currently, rotary kilns generally do not differentiate between different types of hazardous waste and incinerate all received hazardous waste directly. Because hazardous waste is complex, it typically includes various solid and liquid hazardous wastes, and even many solid-liquid coexisting hazardous wastes. For example, solid hazardous wastes differ in type, calorific value, form, and properties; treating them together can lead to uneven calorific value distribution within the kiln, incomplete combustion, and consequently, coking and blockage. Liquid hazardous wastes can have varying degrees of fluidity, while others are very viscous. Diluted hazardous waste liquids have different acidity / alkalinity and are corrosive, while viscous hazardous waste liquids are usually volatile, with the volatile components being high-calorific-value organics; furthermore, volatile components with low flash points are explosive. Treating solid-liquid coexisting wastes together can lead to blockage of the waste liquid spray gun and atomizer. These types of problems can lead to unsatisfactory incineration results and can easily cause production shutdowns for maintenance. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a rotary kiln feeding chain system for handling multi-source hazardous waste with mixed solid and liquid components. By pretreating solid hazardous waste, liquid hazardous waste, and coexisting solid-liquid hazardous waste separately and feeding them together, a complete rotary kiln feeding chain for hazardous waste treatment is formed, which effectively improves the efficiency of rotary kiln hazardous waste treatment and reduces the wear and tear on the rotary kiln and its components.

[0004] To achieve the above objectives, the present invention provides a rotary kiln feed chain system for resolving multi-source hazardous waste containing solids and liquids, comprising:

[0005] A solid-liquid mixture pretreatment system, comprising a slag outlet and a first liquid outlet;

[0006] The solid feed system is connected at its upper end to the slag outlet and at its lower end to the rotary kiln.

[0007] A dilution hazardous waste liquid pretreatment system is connected to the first outlet. The dilution hazardous waste liquid pretreatment system includes a first volatile matter outlet and a second outlet. The first volatile matter outlet is connected to the rotary kiln through a combustion-supporting exhaust gas pipeline, and the second outlet is connected to the rotary kiln.

[0008] A viscous hazardous waste liquid pretreatment system, comprising a second volatile matter outlet and a third liquid outlet, wherein the second volatile matter outlet is connected to the combustion-supporting waste gas pipeline, and the third liquid outlet is connected to the rotary kiln.

[0009] Optionally, the solid-liquid mixture pretreatment system includes:

[0010] The unloading centrifuge is equipped with a cloth feeding assembly and a feed inlet on its upper part, and the liquid outlet of the unloading centrifuge is connected to the diluted hazardous waste liquid pretreatment system through a filtrate storage tank.

[0011] The discharge port of the discharge centrifuge is connected to the double roll crusher through a storage silo, and the discharge port of the double roll crusher is connected to the solid feeding system.

[0012] Optionally, the filtrate storage tank is equipped with a diaphragm pump, the storage tank is equipped with an electronic valve, and the discharge port of the double-roll crusher is equipped with a gate valve.

[0013] Optionally, the solid feeding system includes:

[0014] Z-shaped feed cylinder, the upper and lower parts of which are respectively connected to the slag outlet and the rotary kiln;

[0015] A conveyor belt feeder is located on the upper part of the Z-shaped feed cylinder, with one end of the conveyor belt feeder located below the slag outlet;

[0016] A hydraulic push rod is located at the lower part of the Z-shaped feed cylinder.

[0017] Optionally, a scraper is provided in the middle of the Z-shaped feed cylinder, and the scraper cooperates with the other end of the conveyor belt feeder.

[0018] Optionally, the diluted hazardous waste pretreatment system includes:

[0019] A dilution waste liquid storage tank is connected to the first outlet. The upper part of the dilution waste liquid storage tank is provided with a dilution tank suction hood, which is connected to the combustion-supporting exhaust gas pipeline. The dilution waste liquid storage tank is provided with a first stirrer and a first pH meter.

[0020] The first three-way ball valve has its inlet connected to the diluted waste liquid storage tank, and its two outlets connected to the acid storage tank and the alkaline storage tank, respectively.

[0021] The neutralization reaction chamber is connected to the acid storage tank and the alkaline storage tank respectively via a second three-way ball valve. The neutralization reaction chamber is equipped with a second stirrer and a second pH meter.

[0022] A reaction chamber rotor pump has one end mounted on the neutralization reaction chamber, and the other end of the reaction chamber rotor pump is connected to the rotary kiln through a reaction chamber atomizer;

[0023] The first gas lift pump is installed at one end on the neutralization reaction chamber;

[0024] A condenser is connected to the other end of the first air-lift pump. The condenser is connected to the combustion-supporting exhaust gas pipeline through a second air-lift pump. The condenser is connected to the rotary kiln through a waste liquid spray gun.

[0025] Optionally, a circulating cooling water jacket is provided at the connection between the solid feeding system and the rotary kiln, and the circulating cooling water jacket is connected to the condenser.

[0026] Optionally, an evaporation heat source is provided on the neutralization reaction chamber, and the evaporation heat source is connected to the secondary combustion chamber of the rotary kiln.

[0027] Optionally, the viscous hazardous waste pretreatment system includes:

[0028] A viscous hazardous waste liquid storage tank is provided with a liquid inlet and a third stirrer. The viscous hazardous waste liquid storage tank is connected to the combustion-supporting exhaust gas pipeline through a viscous tank suction hood.

[0029] A viscous tank rotor pump is connected at one end to the viscous hazardous waste liquid storage tank, and the viscous tank rotor pump is connected to the rotary kiln through a viscous tank atomizer.

[0030] Optionally, the unloading centrifuge is a flat-plate scraper under-discharge centrifuge.

[0031] This invention provides a rotary kiln feed chain system for solving the problem of mixed solid and liquid hazardous waste from multiple sources, and its beneficial effects are as follows:

[0032] 1. The feeding chain system adopts a feeding mode of "screw feeder + double roll crusher + conveyor belt feeder + hydraulic push rod", which can more accurately and effectively control the amount of material fed into the rotary kiln;

[0033] 2. The hazardous waste liquid treatment in this feed chain system adopts a combination of a dilution hazardous waste liquid pretreatment system and a viscous hazardous waste liquid pretreatment system, which realizes the separate pretreatment of liquids with different fluidity, refines the feeding process, and has a better ability to deal with complex industrial hazardous waste.

[0034] 3. This feed chain system utilizes the waste heat of the secondary combustion chamber to evaporate and concentrate the liquid with a high water content in the neutralization reaction chamber, making full use of waste heat and saving energy. It also utilizes the condensate in the condenser, which can participate in the circulating cooling of the kiln head and can also be used as a low-calorific-value feedstock added to the rotary kiln by utilizing the high specific heat capacity of water.

[0035] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0036] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0037] Figure 1 A schematic diagram of a rotary kiln feed chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to an embodiment of the present invention is shown.

[0038] Figure 2 It shows Figure 1 Enlarged view of point A.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Rotary kiln; 2. Combustion exhaust gas pipeline; 3. Discharge centrifuge; 4. Liquid outlet; 5. Filtrate storage tank; 6. Double roll crusher; 7. Storage silo; 8. Screw feeder; 9. Diaphragm pump; 10. Slide valve; 11. Z-type feed cylinder; 12. Conveyor belt feeder; 13. Hydraulic push rod; 14. Scraper; 15. Diluted waste liquid storage tank; 16. Diluted tank exhaust hood; 17. First agitator; 18. First three-way ball valve; 19. Acid storage tank; 20. Alkaline storage tank; 21. Neutralization reaction chamber; 22. Second three-way ball valve; 23. Diluent tank diaphragm pump; 24. Reaction chamber rotor pump; 25. Reaction chamber atomizer; 26. First air lift pump; 27. Condensate tank; 28. Second air lift pump; 29. ​​Waste liquid spray gun; 30. Circulating cooling water jacket; 31. Second combustion chamber; 32. Viscous hazardous waste liquid storage tank; 33. Liquid inlet; 34. Third agitator; 35. Viscous tank suction hood; 36. Viscous tank rotor pump; 37. Viscous tank atomizer; 38. Discharge port. Detailed Implementation

[0041] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0042] This invention provides a rotary kiln feed chain system for solving the problem of mixed solid and liquid hazardous waste from multiple sources, comprising:

[0043] A solid-liquid mixture pretreatment system, comprising a slag outlet and a first liquid outlet;

[0044] The solid feed system is connected to the slag outlet at the top and to the rotary kiln at the bottom.

[0045] A dilution hazardous waste liquid pretreatment system is connected to a first outlet. The dilution hazardous waste liquid pretreatment system includes a first volatile matter outlet and a second outlet. The first volatile matter outlet is connected to a rotary kiln through a combustion exhaust gas pipeline, and the second outlet is connected to the rotary kiln.

[0046] The viscous hazardous waste liquid pretreatment system includes a second volatile matter outlet and a third liquid outlet. The second volatile matter outlet is connected to the combustion gas pipeline, and the third liquid outlet is connected to the rotary kiln.

[0047] Specifically, this feed chain system discharges the solid-liquid mixture into a solid-liquid mixture pretreatment system for processing and separation. The filter residue is discharged into a solid feed system, where large pieces of hazardous waste are crushed to the required size and finally discharged into the rotary kiln. The separated filtrate is discharged into a diluted hazardous waste liquid pretreatment system for treatment. In this system, volatiles and water vapor are incorporated into the combustion-supporting gas pipeline, and the concentrate is sprayed into the rotary kiln for incineration. The viscous hazardous waste liquid pretreatment system can perform gas-liquid separation on viscous hazardous liquids. Thus, both diluted and viscous waste liquids are collected by volatiles, maximizing the combustion-supporting effect of organic volatiles and saving energy. The viscous hazardous waste liquid pretreatment system also injects volatiles into the combustion-supporting gas pipeline for separation treatment, and the viscous hazardous waste liquid is sprayed into the rotary kiln for incineration. This feed chain system, employing a solid-liquid separation pretreatment method, improves safety, enables more efficient rotary kiln incineration compatibility, and meets the feeding requirements for stable incineration of hazardous waste in rotary kilns, resulting in significant environmental and economic benefits.

[0048] Optionally, the solid-liquid mixture pretreatment system includes:

[0049] The unloading centrifuge has a cloth feeding assembly and a feed inlet on top, and the liquid outlet of the unloading centrifuge is connected to the dilute hazardous waste liquid pretreatment system through the filtrate storage tank.

[0050] The discharge port of the double roll crusher and the discharge centrifuge are connected to the double roll crusher through a storage silo, and the discharge port of the double roll crusher is connected to the solid feeding system.

[0051] Specifically, the solid-liquid mixture enters the discharge centrifuge through the cloth assembly and feed inlet. Under the action of the centrifuge's drum and scraper, solid-liquid separation occurs. The separated filtrate enters the filtrate storage bin, and then passes through a diaphragm pump into the diluent storage tank. The filter residue is discharged into the storage bin, and then the large pieces of hazardous waste are crushed by a double-roll crusher before being sent to the solid feed system. The outlet of the filtrate storage bin is equivalent to the first liquid outlet, and the discharge port of the double-roll crusher is equivalent to the slag outlet.

[0052] Optionally, a diaphragm pump is installed on the filtrate storage silo, an electronic valve is installed on the storage silo, and a slide gate valve is installed at the discharge port of the double roll crusher.

[0053] Specifically, the filtrate is pumped into the diluent storage tank by a diaphragm pump, while the electronic valve and the gate valve control the feed rate of the screw feeder and the output rate of the twin-roll crusher, respectively.

[0054] Optionally, the solids feeding system includes:

[0055] The Z-shaped feed cylinder has its upper and lower parts connected to the slag outlet and the rotary kiln, respectively.

[0056] The conveyor belt feeder is located at the top of the Z-shaped feed cylinder, with one end of the conveyor belt feeder located below the slag outlet.

[0057] The hydraulic push rod is located at the bottom of the Z-shaped feed cylinder.

[0058] Specifically, the Z-shaped feed cylinder is placed horizontally in the solid feeding system. The conveyor belt feeder is set at the upper starting end of the Z-shaped feed cylinder. The conveyor belt feeder transfers the feed from the slag outlet. When the waste slag falls from the conveyor belt feeder, it reaches the lower part of the Z-shaped feed cylinder and is then evenly fed into the rotary kiln by the hydraulic pusher, preventing accumulation at the kiln opening. The long-stroke internal space of the Z-shaped feed cylinder can effectively prevent the backheating of the rotary kiln head from causing heat loss to the feeding equipment.

[0059] Optionally, a scraper is provided in the middle of the Z-shaped feed cylinder, and the scraper cooperates with the other end of the conveyor belt feeder.

[0060] Specifically, a scraper is installed at the end of the conveyor belt feeder. This scraper can remove waste from the conveyor belt and prevent residue from remaining.

[0061] Optionally, the dilution hazardous waste pretreatment system includes:

[0062] A dilution waste liquid storage tank is connected to the first outlet. The upper part of the dilution waste liquid storage tank is equipped with a dilution tank suction hood, which is connected to the combustion exhaust gas pipeline. The dilution waste liquid storage tank is equipped with a first stirrer and a first pH meter.

[0063] The first three-way ball valve has its inlet connected to the diluted waste liquid storage tank, and its two outlets connected to the acid storage tank and the alkaline storage tank, respectively.

[0064] The neutralization reaction chamber is connected to the acid storage tank and the alkaline storage tank respectively via a second three-way ball valve. The neutralization reaction chamber is equipped with a second stirrer and a second pH meter.

[0065] The reaction chamber rotor pump has one end set on the neutralization reaction chamber, and the other end of the reaction chamber rotor pump is connected to the rotary kiln through the reaction chamber atomizer.

[0066] The first gas lift pump is installed at one end on the neutralization reaction chamber;

[0067] The condenser is connected to the other end of the first air-lift pump. The condenser is connected to the combustion exhaust gas pipeline through the second air-lift pump. The condenser is connected to the rotary kiln through the waste liquid spray gun.

[0068] Specifically, the viscous hazardous liquid is discharged from the solid-liquid mixture pretreatment system into the dilution waste liquid storage tank. Under the action of the agitator inside the tank, the volatile components are promoted to evaporate. The volatile components are then discharged through the dilution tank's exhaust hood into the combustion exhaust gas pipeline for separate treatment. The dilution waste liquid storage tank discharges the waste liquid into the neutralization reaction chamber. The discharge status of the acidic and alkaline storage tanks is controlled by a diaphragm pump, two pH meters, and two three-way ball valves on the dilution waste liquid storage tank to ensure that the pH value of the reaction liquid in the neutralization reaction chamber is close to neutral. The neutralization reaction chamber... The first air-lift pump is connected to discharge volatiles and water vapor into the condenser. After the condenser condenses the water vapor, the remaining volatiles are fed into the combustion exhaust gas pipeline by the second air-lift pump. The remaining concentrate in the neutralization reaction chamber is drawn by the reaction chamber rotor pump and discharged into the rotary kiln by the reaction chamber atomizer. The outlet of the condenser is connected by a pipeline to discharge the concentrate into the rotary kiln through the waste liquid spray gun. The first volatile outlet includes the outlet of the second air-lift pump and the suction hood of the dilution tank, and the second outlet includes the nozzle of the reaction chamber atomizer and the nozzle of the waste liquid spray gun.

[0069] Optionally, a circulating cooling water jacket is provided at the connection between the solid feed system and the rotary kiln, and the circulating cooling water jacket is connected to the condenser.

[0070] Specifically, a circulating cooling water jacket is installed on the outside of the middle and lower horizontal parts of the Z-shaped feed cylinder, and circulating cooling water is circulated in the jacket to prevent the kiln head temperature from being too high and damaging the solid feed system.

[0071] Optionally, an evaporation heat source is provided on the neutralization reaction chamber, and the evaporation heat source is connected to the secondary combustion chamber of the rotary kiln.

[0072] Specifically, because the liquid in the neutralization reaction chamber has a high water content, an evaporation heat source is needed for evaporation and concentration. The heat required for evaporation and concentration comes entirely from the waste heat of the secondary combustion chamber, which can make full use of waste heat and save energy.

[0073] Optionally, the viscous hazardous waste pretreatment system includes:

[0074] The viscous hazardous waste liquid storage tank is equipped with an inlet and a third agitator. The viscous hazardous waste liquid storage tank is connected to the combustion exhaust gas pipeline through the viscous tank suction hood.

[0075] The viscous tank rotor pump is connected at one end to the viscous hazardous waste liquid storage tank, and the viscous tank rotor pump is connected to the rotary kiln through the viscous tank atomizer.

[0076] Specifically, the viscous hazardous waste liquid storage tank collects viscous hazardous waste liquid through the inlet. The agitator inside the storage tank treats the hazardous waste liquid to prevent it from solidifying and to accelerate the volatilization of high-calorific-value organic volatiles. The viscous tank suction hood draws in the volatiles and discharges them into the combustion-supporting exhaust gas pipeline, which then sends them into the rotary kiln for combustion. The viscous tank rotor pump extracts the viscous hazardous waste liquid more effectively and sprays it into the rotary kiln for incineration through the viscous tank atomizer. The second volatiles outlet includes the outlet of the viscous tank suction hood, and the third liquid outlet includes the outlet of the viscous tank rotor pump.

[0077] The combustion exhaust gas pipeline connects the dilution tank suction hood, the viscous tank suction hood, and the condensation tank to form a shared and complete volatile matter treatment system. This separates the volatile matter from other liquid and solid wastes, effectively improving the efficiency of the rotary kiln in treating hazardous waste and reducing the wear and tear on the rotary kiln and its components.

[0078] Optionally, the discharge centrifuge is a flat-plate scraper discharge centrifuge.

[0079] Specifically, using a flat-plate scraper centrifuge for bottom discharge can quickly and efficiently separate complex solid-liquid mixtures of hazardous waste, facilitating subsequent processing.

[0080] Example

[0081] like Figures 1 to 2 As shown, this invention provides a rotary kiln feed chain system for solving the problem of multi-source hazardous waste with solid-liquid mixtures, comprising:

[0082] A solid-liquid mixture pretreatment system, comprising a slag outlet and a first liquid outlet;

[0083] The solid feed system is connected to the slag outlet at the top and to the rotary kiln 1 at the bottom.

[0084] The dilution hazardous waste liquid pretreatment system is connected to the first outlet. The dilution hazardous waste liquid pretreatment system includes a first volatile matter outlet and a second outlet. The first volatile matter outlet is connected to the rotary kiln 1 through the combustion exhaust gas pipeline 2, and the second outlet is connected to the rotary kiln 1.

[0085] The viscous hazardous waste liquid pretreatment system includes a second volatile matter outlet and a third liquid outlet. The second volatile matter outlet is connected to the combustion exhaust gas pipeline 2, and the third liquid outlet is connected to the rotary kiln 1.

[0086] In this embodiment, the solid-liquid mixture pretreatment system includes:

[0087] The unloading centrifuge 3 is equipped with a cloth feeding assembly and a feed inlet on its top. The liquid outlet 4 of the unloading centrifuge 3 is connected to the dilution hazardous waste liquid pretreatment system through the filtrate storage tank 5.

[0088] The discharge port 38 of the double roll crusher 6 and the unloading centrifuge 3 is connected to the double roll crusher 6 through the storage bin 7, and the discharge port of the double roll crusher 6 is connected to the solid feeding system.

[0089] In this embodiment, a screw feeder 8 is provided between the storage bin 7 and the double roll crusher 6.

[0090] In this embodiment, a diaphragm pump 9 is provided on the filtrate storage tank 5, an electronic valve is provided on the storage tank 7, and a slide gate valve 10 is provided at the discharge port of the double roll crusher 6.

[0091] In this embodiment, the solid feeding system includes:

[0092] Z-shaped feed cylinder 11, the upper and lower parts of which are connected to the slag outlet and the rotary kiln 1 respectively;

[0093] The conveyor belt feeder 12 is located on the upper part of the Z-shaped feed cylinder 11, with one end of the conveyor belt feeder 12 located below the slag outlet.

[0094] The hydraulic push rod 13 is located at the lower part of the Z-shaped feed cylinder 11.

[0095] In this embodiment, a scraper 14 is provided in the middle of the Z-shaped feed cylinder 11, and the scraper 14 cooperates with the other end of the conveyor belt feeder 12.

[0096] In this embodiment, the dilution hazardous waste pretreatment system includes:

[0097] A dilution waste liquid storage tank 15 is connected to a first outlet. A dilution tank suction hood 16 is provided on the upper part of the dilution waste liquid storage tank 15. The dilution tank suction hood 16 is connected to the combustion exhaust gas pipeline 2. A first stirrer 17 and a first pH meter are provided inside the dilution waste liquid storage tank 15.

[0098] The inlet of the first three-way ball valve 18 is connected to the dilution waste liquid storage tank 15 through the dilution tank diaphragm pump 23, and the two outlets of the first three-way ball valve 18 are connected to the acid storage tank 19 and the alkaline storage tank 20 respectively.

[0099] The neutralization reaction chamber 21 is connected to the acid storage tank 19 and the alkaline storage tank 20 respectively via the second three-way ball valve 22. The neutralization reaction chamber 21 is equipped with a second stirrer and a second pH meter.

[0100] The reaction chamber rotor pump 24 is installed at one end on the neutralization reaction chamber 21, and the other end of the reaction chamber rotor pump 24 is connected to the rotary kiln 1 through the reaction chamber atomizer 25.

[0101] The first gas lift pump 26 is installed at one end on the neutralization reaction chamber 21;

[0102] The condenser 27 is connected to the other end of the first air lift pump 26. The condenser 27 is connected to the combustion exhaust gas pipeline 2 through the second air lift pump 28. The condenser 27 is connected to the rotary kiln 1 through the waste liquid spray gun 29.

[0103] In this embodiment, a circulating cooling water jacket 30 is provided at the connection between the solid feeding system and the rotary kiln, and the circulating cooling water jacket 30 is connected to the condenser 27.

[0104] In this embodiment, an evaporation heat source is provided on the neutralization reaction chamber 21, and the evaporation heat source is connected to the secondary combustion chamber 31 of the rotary kiln 1.

[0105] In this embodiment, the viscous hazardous waste pretreatment system includes:

[0106] The viscous hazardous waste liquid storage tank 32 is equipped with a liquid inlet 33 and a third stirrer 34. The viscous hazardous waste liquid storage tank 32 is connected to the combustion exhaust gas pipeline 2 through the viscous tank suction hood 35.

[0107] The viscous tank rotor pump 36 is connected at one end to the viscous hazardous waste liquid storage tank 32, and the viscous tank rotor pump 36 is connected to the rotary kiln 1 through the viscous tank atomizer 37.

[0108] In this embodiment, the unloading centrifuge 3 is a flat-plate scraper under-discharge centrifuge.

[0109] In summary, the rotary kiln feeding chain system discharges the solid-liquid mixture into the unloading centrifuge 3. After separation, the solid hazardous waste is transferred to the solid feeding system and finally enters the rotary kiln 1, while the filtrate is discharged to the diluted waste liquid storage tank 15. The filtrate is then neutralized by the reaction in the acid storage tank 19 and the alkaline storage tank 20. The volatiles and water vapor are discharged into the combustion exhaust gas pipeline 2. The concentrate is injected into the rotary kiln for incineration by the reaction chamber atomizer 25 and the waste liquid spray gun 29. The viscous hazardous waste liquid storage tank 32 is used to treat viscous waste liquid. After accelerating the volatilization of high-calorific-value organic volatiles, the volatiles are connected to the combustion exhaust gas pipeline and sent into the rotary kiln 1 for combustion. The viscous hazardous waste liquid is sprayed into the rotary kiln 1 for incineration by the viscous tank atomizer 37.

[0110] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A rotary kiln feeding chain system for solving the problem of mixed solid and liquid hazardous waste from multiple sources, characterized in that, include: A solid-liquid mixture pretreatment system, comprising a slag outlet and a first liquid outlet; The solid feed system is connected at its upper end to the slag outlet and at its lower end to the rotary kiln. A dilution hazardous waste liquid pretreatment system is connected to the first outlet. The dilution hazardous waste liquid pretreatment system includes a first volatile matter outlet and a second outlet. The first volatile matter outlet is connected to the rotary kiln through a combustion-supporting exhaust gas pipeline, and the second outlet is connected to the rotary kiln. A viscous hazardous waste liquid pretreatment system, the viscous hazardous waste liquid pretreatment system including a second volatile matter outlet and a third liquid outlet, the second volatile matter outlet being connected to the combustion-supporting waste gas pipeline, and the third liquid outlet being connected to the rotary kiln; The diluted hazardous waste pretreatment system includes: A dilution waste liquid storage tank is connected to the first outlet. The upper part of the dilution waste liquid storage tank is provided with a dilution tank suction hood, which is connected to the combustion-supporting exhaust gas pipeline. The dilution waste liquid storage tank is provided with a first stirrer and a first pH meter. The first three-way ball valve has its inlet connected to the diluted waste liquid storage tank, and its two outlets connected to the acid storage tank and the alkaline storage tank, respectively. The neutralization reaction chamber is connected to the acid storage tank and the alkaline storage tank respectively via a second three-way ball valve. The neutralization reaction chamber is equipped with a second stirrer and a second pH meter. A reaction chamber rotor pump has one end mounted on the neutralization reaction chamber, and the other end of the reaction chamber rotor pump is connected to the rotary kiln through a reaction chamber atomizer; The first gas lift pump is installed at one end on the neutralization reaction chamber; A condenser is connected to the other end of the first air-lift pump. The condenser is connected to the combustion-supporting exhaust gas pipeline through a second air-lift pump. The condenser is connected to the rotary kiln through a waste liquid spray gun. The viscous hazardous waste liquid pretreatment system includes: A viscous hazardous waste liquid storage tank is provided with a liquid inlet and a third stirrer. The viscous hazardous waste liquid storage tank is connected to the combustion-supporting exhaust gas pipeline through a viscous tank suction hood. A viscous tank rotor pump is connected at one end to the viscous hazardous waste liquid storage tank, and the viscous tank rotor pump is connected to the rotary kiln through a viscous tank atomizer.

2. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 1, characterized in that, The solid-liquid mixture pretreatment system includes: The unloading centrifuge is equipped with a cloth feeding assembly and a feed inlet on its upper part, and the liquid outlet of the unloading centrifuge is connected to the diluted hazardous waste liquid pretreatment system through a filtrate storage tank. The discharge port of the discharge centrifuge is connected to the double roll crusher through a storage silo, and the discharge port of the double roll crusher is connected to the solid feeding system.

3. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 2, characterized in that, The filtrate storage silo is equipped with a diaphragm pump, the storage silo is equipped with an electronic valve, and the discharge port of the double-roll crusher is equipped with a gate valve.

4. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 1, characterized in that, The solid feeding system includes: Z-shaped feed cylinder, the upper and lower parts of which are respectively connected to the slag outlet and the rotary kiln; A conveyor belt feeder is located on the upper part of the Z-shaped feed cylinder, with one end of the conveyor belt feeder located below the slag outlet; A hydraulic push rod is located at the lower part of the Z-shaped feed cylinder.

5. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 4, characterized in that, A scraper is provided in the middle of the Z-shaped feed cylinder, and the scraper cooperates with the other end of the conveyor belt feeder.

6. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 1, characterized in that, A circulating cooling water jacket is provided at the connection between the solid feeding system and the rotary kiln, and the circulating cooling water jacket is connected to the condenser.

7. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 1, characterized in that, An evaporation heat source is provided on the neutralization reaction chamber, and the evaporation heat source is connected to the secondary combustion chamber of the rotary kiln.

8. The rotary kiln feeding chain system for resolving multi-source hazardous waste with solid-liquid mixtures according to claim 2, characterized in that, The unloading centrifuge is a flat-plate scraper-type under-discharge centrifuge.

Images