Pyrolysis processing system and method for hazardous waste in automotive production processes

Abstract

The present application relates to pyrolysis processing technical field, especially to a kind of pyrolysis processing system and method for hazardous waste in automobile production process, its system utilizes the setting discontinuous feeding or discharging, determines feeding rhythm or discharging rhythm by unit mass, to adjust feeding rhythm and the scheduling module of processing frequency according to discharging rhythm, utilize the mode of setting separation module, pyrolysis module, discharging module, acquisition module, several closed modules and scheduling module, the pyrolysis of discontinuous feeding, discharging and needing continuous operation is linked, and the pyrolysis environment is effectively avoided due to feeding or discharging The instability of pyrolysis processing system is effectively improved by the way of timing and quantitative.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis treatment technology, and more particularly to a pyrolysis treatment system and method for hazardous waste in automobile production. Background Technology

[0002] Pyrolysis of waste in automobile production refers to the chemical decomposition of organic solid waste generated during automobile manufacturing under high temperature and completely anaerobic or hypoxic conditions. Due to the constraints of the automobile production process, the generation of waste is discontinuous.

[0003] However, because pyrolysis reactors need to operate continuously without interruption, and because automotive waste is highly complex, the processing environment can change during the process.

[0004] Chinese Patent Application No. CN202311248759.7 discloses a mechanical grate pyrolysis incinerator, comprising a furnace body, a slag discharge pipe, a slag discharge machine, and a slag compression device. The slag discharge pipe is connected to the furnace body, and the slag discharge machine is connected below the slag discharge pipe. The slag compression device includes a connecting pipe, a compression platform, a first compression plate, a second compression plate, a first driving component, and a second driving component. One end of the connecting pipe is connected to the slag discharge port of the slag discharge machine. The compression platform has a compression chamber extending through both ends, and the bottom end of the connecting pipe is connected to the compression chamber. The bottom surface of the compression chamber has a discharge port communicating with the bottom surface of the compression platform. Both the first and second compression plates slide within the compression chamber. The first driving component is mounted on the compression platform and drives the first compression plate to slide within the compression chamber. The second driving component is also mounted on the compression platform and drives the first compression plate to slide within the compression chamber. This patent has the effect of increasing the slag transport capacity of a single truck.

[0005] However, since the pyrolysis process requires continuous operation, in actual production, neither feeding nor discharging can be guaranteed to be continuous at all times. Therefore, the adjustment of the pyrolysis system and pyrolysis furnace cannot effectively meet the stability requirements of hazardous waste treatment. Summary of the Invention

[0006] Therefore, the present invention provides a pyrolysis treatment system and method for hazardous waste in automobile production, in order to overcome the problem in the prior art that the feeding and discharging of materials cannot be guaranteed to be continuous at all times in actual production, which leads to a decrease in the stability of hazardous waste treatment.

[0007] To achieve the above objectives, the present invention provides a pyrolysis treatment system for hazardous waste in automobile production, comprising: A separation module used to separate raw materials; A pyrolysis module for pyrolyzing the raw material to form pyrolysis material; The discharge module is used to collect the pyrolysis material; The data acquisition module, which includes several data collectors connected to the separation module, the pyrolysis module, and the discharge module, is used to determine the feeding rhythm of the raw material and... Used to determine the discharge rhythm of the pyrolysis material, and, Used to determine the processing frequency of the pyrolysis module; The first sealing module is used to seal the raw material into the pyrolysis module in response to the feeding rhythm; The second sealing module is used to respond to the discharge rhythm of the pyrolysis material and seal off the discharge environment of the pyrolysis module; The scheduling module is used to adjust the feeding rhythm and the processing frequency according to the discharge rhythm; The feeding rhythm is the frequency at which a unit mass of raw material enters the processing system. The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. For discontinuous feeding or discharging, the feeding rhythm or the discharging rhythm is determined according to the unit mass.

[0008] In particular, the first closed module includes: A pre-sealing device, which is connected to the separation module, is used to introduce protective gas according to the separation of the raw material by the separation module, and send the raw material to the corresponding pyrolysis module; A pyrolysis closure device, which is connected to the pyrolysis module and is located at the front end of the pyrolysis module, is used to open or stop the conveying of the raw material according to the feeding rhythm; A cylinder connected to the pre-sealer and the pyrolysis sealer is used to store the protective gas.

[0009] In particular, for a single feed, the first sealing module determines the feed protection boundary of the protective gas based on the processing frequency; In response to the reduction in the processing frequency, the pre-sealer expands the feed protection boundary; In response to the increase in processing frequency, the pre-sealer reduces the feed protection boundary; Wherein, the feed protection boundary is the maximum position occupied by the protective gas in the separation module; The processing frequency is the corresponding frequency of the pyrolysis module under the current processing environment.

[0010] In particular, the separation module responds to the expansion of the feed protection boundary by adjusting the feed rhythm according to the pressure intensity of the pyrolysis module, wherein, If the pressure in the pyrolysis module decreases, the separation module accelerates the feeding rate; If the pressure of the pyrolysis module increases, the separation module slows down the feeding rhythm and adjusts the feeding rhythm of the pre-seal or pyrolysis seal according to the expansion or contraction of the feeding protection boundary. If the feed protection boundary expands to exceed the maximum feed stability boundary, the separation module controls the pre-sealer to reduce the pressure of the protective gas; If the feed protection boundary shrinks to below the minimum feed stability boundary, the pyrolysis closure device closes to stop the raw material from being fed to the pyrolysis module; The maximum feed stability boundary and the minimum feed stability boundary are the rated operating ranges of the pre-sealing device, which are related to the operating pressure of the pyrolysis module.

[0011] In particular, the second enclosed module includes: A post-sealing device, which is connected to the pyrolysis module and the discharge module, is used to adjust the discharge rhythm in response to the processing frequency; An environmental regulator, connected to the rear closure, is used to adjust the discharge environment in response to the discharge rhythm; A collector connected to the discharge module for collecting the protective gas; A cylinder connected to the environmental conditioner and the collector; The rear closure is located between the pyrolysis module and the discharge module; Regarding the discharge rhythm, the rear closure pushes a unit mass of pyrolysis material to the discharge module. When the processing frequency increases, the rear closure accelerates the discharge rhythm.

[0012] In particular, the environmental regulator is provided with a discharge threshold, and the process regulator responds to the pressure change of the pyrolysis module to adjust the discharge protection boundary so that the discharge protection boundary does not exceed the discharge protection threshold. The environmental regulator also responds to the discharge rhythm by adjusting the discharge threshold, including: In response to a decrease in the discharge rhythm, the discharge protection threshold is increased; In response to an increase in the discharge rhythm, the discharge protection threshold is lowered; The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

[0013] In particular, in response to the decrease in the discharge rhythm, the scheduling module adjusts the second closed module, wherein, If the processing frequency is increased, the scheduling module determines that the discharge module is blocked and controls the second sealing module to purge the discharge module.

[0014] In particular, the scheduling module adjusts the pyrolysis module according to the state of the separation module, wherein, If the feeding rhythm decreases, determine the state of the separation module and adjust the pyrolysis module to a processing frequency corresponding to the feeding rhythm; If the separation module does not supply the raw material, the scheduling module expands the feed protection boundary of the first closed module to the maximum feed stability boundary and controls the pyrolysis module to enter standby mode.

[0015] According to the above system, the present invention provides a pyrolysis treatment method for hazardous waste in automobile production, comprising: Step Se1: Collect the feeding rhythm of the raw material and the processing frequency of the pyrolysis module; Step Se2: Determine the feed protection boundary of the protective gas according to the processing frequency, and the feed protection boundary is the maximum position occupied by the protective gas in the separation module; Step Se3: In response to a decrease or increase in the processing frequency, expand or shrink the feed protection boundary; Step Se4: In response to the expansion or contraction of the feed protection boundary, the feed rhythm is adjusted according to the pressure regulation of the pyrolysis module, wherein... In response to the pressure reduction in the pyrolysis module, the feeding rhythm is accelerated; In response to the pressure increase in the pyrolysis module, the feeding rhythm is slowed down, and the pre-seal or pyrolysis seal is adjusted according to the changing direction of the feeding protection boundary; Step Se5: In response to the feed protection boundary expanding beyond the maximum feed stability boundary, reduce the pressure of the protective gas; When the feed protection boundary shrinks below the minimum feed stability boundary, the feeding of raw material is stopped; The feeding rhythm is the frequency at which a unit mass of raw material enters the processing system. The maximum and minimum feed stability boundaries are the rated operating ranges of the pre-sealing device, which are related to the operating pressure of the pyrolysis module.

[0016] This invention also provides a method for pyrolysis treatment of hazardous waste during automobile production, comprising: Step So1: Collect the discharge rhythm of the pyrolysis material and the processing frequency of the pyrolysis module; Step So2: In response to the discharge rhythm, the discharge environment of the pyrolysis module is closed. Step So3: In response to the pressure change of the pyrolysis module, adjust the discharge protection boundary so that the discharge protection boundary does not exceed the preset discharge protection threshold. Step So4: In response to the change in the discharge rhythm, adjust the discharge protection threshold. If the discharge rate decreases, the discharge protection threshold should be increased. If the discharge rate is increased, the discharge protection threshold is reduced; Step So5: In response to the decrease in the discharge rhythm, determine the change in the processing frequency. If the processing frequency increases, the discharge module is determined to be blocked, and the discharge module is purged. The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

[0017] Compared with the prior art, the beneficial effect of the present invention is that by setting up a separation module, a pyrolysis module, a discharge module, a collection module, several closed modules and a scheduling module, the discontinuous feeding and discharging and the continuous operation of pyrolysis are linked together. By using a timed and quantitative method, the pyrolysis environment is effectively prevented from being damaged or the equipment is running idle due to feeding or discharging, thereby effectively improving the stability of the pyrolysis treatment system.

[0018] In particular, by setting up a pre-sealer, a pyrolysis sealer, and a cylinder before the pyrolysis module, protective gas is introduced according to the feeding situation of the raw material, and the start and stop of the pyrolysis sealer are controlled according to the feeding rhythm. This allows the coverage of the protective gas to be dynamically matched with the actual working conditions of the pyrolysis module, ensuring the sealing effect while reducing unnecessary consumption of protective gas. Linking the protective gas storage with the feeding sealing function provides a hardware foundation for subsequent adjustment based on the processing frequency, thereby improving the stability of the feeding end sealing control.

[0019] In particular, by adjusting the feeding rhythm according to the expansion or contraction of the feed protection boundary and the pressure of the pyrolysis module, the feeding rhythm is controlled in conjunction with the real-time pressure of the pyrolysis module and the rated working range of the closure, which effectively prevents the pyrolysis effect from decreasing or safety hazards caused by drastic pressure fluctuations, thereby improving the stability of the pyrolysis system.

[0020] In particular, by setting up a post-sealer, environmental regulator, collector, and cylinder, the system can respond to the processing frequency in a timely manner and adjust the discharge rhythm, so that the action speed at the discharge end matches the processing capacity of the pyrolysis module. This ensures that the discharge protection boundary is always within a controllable and safe range, avoiding the accumulation of raw materials or the limitation of processing frequency caused by untimely discharge, thereby improving the stability of the pyrolysis system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pyrolysis treatment system of the present invention; Figure 2 This is a supply-side flow chart of the pyrolysis method of the present invention; Figure 3 This is a flow chart of the discharge side of the pyrolysis method of the present invention. Detailed Implementation

[0022] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0023] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0025] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The following are explanations of terms used in this plan: Raw materials: These refer to hazardous waste collected from the automobile production line that has not yet undergone any pyrolysis treatment. They are usually in mixed form and may contain paint residue, waste solvents, sludge, phosphating residue, waste glue, oily rags, etc. Raw materials need to be pre-treated in the separation module (such as crushing, screening, dewatering, etc.) before being sent to the pyrolysis module.

[0027] In this plan, the raw materials include: Waste paint residue generated in automotive painting workshops contains approximately 30% water, benzene compounds, and resin.

[0028] The oily waste rags produced in the stamping workshop are a mixture of mineral oil and metal shavings.

[0029] Waste glue cartridges and residual sealant generated in the welding workshop.

[0030] Pyrolysis material: Solid residues obtained after the raw material is decomposed in the pyrolysis module under high temperature (usually 400~800℃) and anaerobic or hypoxic conditions, including pyrolysis carbon, metal fragments, inorganic ash, etc.

[0031] Protective gas: usually an inert gas (usually nitrogen or argon) is used to replace oxygen, prevent the raw material or pyrolysis material from oxidizing and burning at high temperatures, and maintain a slight positive pressure in the system to prevent air backflow.

[0032] For the treatment of hazardous waste from automobiles, nitrogen with a purity of 99.5% is commonly used as a protective gas, and the gas source comes from an on-site nitrogen generator.

[0033] It should be noted that the multiple functional modules involved in this application are only a logical division based on the functions implemented according to the present invention, and are not a strict limitation on the physical structure; in practical applications, the above functional modules can be implemented by one or more devices or a combination of several devices.

[0034] Please refer to Figure 1 As shown, it is a schematic diagram of the pyrolysis treatment system of the present invention, including: A separation module used to separate raw materials; Used to pyrolyze raw materials to form pyrolysis modules; The discharge module used to collect pyrolysis material; Its characteristic is that it further includes: The data acquisition module, equipped with several data collectors connected to the separation module, pyrolysis module, and discharge module, is used to determine the feeding rhythm of the raw material, and... Used to determine the discharge rhythm of pyrolysis feedstock, and, Used to determine the processing frequency of the pyrolysis module; The first closed module is used to respond to the feeding rhythm and seal the raw material into the pyrolysis module; The second closed module is used to respond to the discharge rhythm of the pyrolysis material and to close the discharge environment of the pyrolysis module. The scheduling module is used to adjust the feeding rhythm and processing frequency according to the discharge rhythm; Among them, the feeding rhythm is the frequency at which a unit mass of raw material enters the processing system; The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. For discontinuous feeding or discharging, the feeding or discharging rhythm is determined based on the unit mass.

[0035] By setting up a separation module, a pyrolysis module, a discharge module, a data acquisition module, several closed modules, and a scheduling module, the discontinuous feeding and discharging processes, as well as the continuous pyrolysis operations, are linked together. Through timed and quantitative methods, the pyrolysis environment is effectively prevented from being disrupted or the equipment from running idle due to feeding or discharging, thereby effectively improving the stability of the pyrolysis processing system.

[0036] In implementation, for discontinuous feeding (such as batch feeding), the equivalent feeding rhythm is calculated based on the unit mass of each batch, such as: If 10 kg of waste paint residue is fed in every 5 minutes, the feeding rate is 2 kg / min.

[0037] 200 kg of waste rubber powder is fed into the pyrolysis furnace every 30 minutes via pneumatic conveying, with an equivalent feeding rate of 6.67 kg / min.

[0038] The system uses a dual gate valve for alternating feeding, with each feeding being 15 kg and an interval of 45 seconds, which translates to a feed rate of 20 kg / min.

[0039] The discharge rhythm is the rate at which material is discharged from the pyrolysis module and conveyed to the discharge module after pyrolysis is completed, such as: The pyrolysis furnace discharges a batch of pyrolysis char every 3 minutes, with each batch weighing 12 kg, so the discharge rate is 4 kg / min.

[0040] The continuous discharge device feeds the pyrolytic carbon to the cooling spiral at a rate of 5 kg / min.

[0041] Intermittent discharge: 50 kg of pyrolysis residue is discharged every 10 minutes, with an equivalent discharge rate of 5 kg / min.

[0042] Processing frequency: refers to the rate at which the pyrolysis furnace can normally process raw materials under the current operating conditions. In this scheme, it is adjusted in conjunction with the feeding rhythm and the discharging rhythm.

[0043] It should be noted that in the pyrolysis of automotive hazardous waste, the processing frequency is affected by factors such as pyrolysis temperature, residence time, and heat transfer efficiency, for example: A pyrolysis furnace is designed to process at a rate of 10 kg / min, but when processing waste paint residue with high water content, the actual processing rate drops to 6 kg / min.

[0044] When treating oily sludge, the treatment frequency is 8 kg / min; when treating waste adhesive, the treatment frequency is reduced to 4 kg / min due to poor thermal conductivity.

[0045] The first closed module includes: A pre-sealer, connected to the separation module, is used to introduce protective gas according to the separation of the raw material by the separation module, and to send the raw material to the corresponding pyrolysis module; A pyrolysis shut-off device, which is connected to the pyrolysis module and is located at the front end of the pyrolysis module, is used to open or stop the conveying of raw materials according to the feeding rhythm. The cylinder connected to the pre-sealer and the pyrolysis sealer is used to store protective gas.

[0046] Specifically, the second closed module includes: The post-sealing device is connected to the pyrolysis module and the discharge module to adjust the discharge rhythm in response to the processing frequency. An environmental regulator, connected to a post-sealer, is used to regulate the discharge environment in response to the discharge rhythm. A collector connected to the discharge module to collect protective gas; Cylinder connected to an environmental conditioner and a collector; The post-sealing device is located between the pyrolysis module and the discharge module; Regarding the discharge rhythm, the post-closure pushes the pyrolysis material per unit mass to the discharge module. When the processing frequency increases, the post-closure accelerates the discharge rhythm.

[0047] In practice, the pre-sealer, pyrolysis sealer, and post-sealer are all mechanical sealing devices, such as rotary valves, gate valves, star feeders, and spiral seals, used to achieve dynamic sealing between different modules, and to work with protective gas to prevent oxygen from entering or combustible gas from leaking.

[0048] Among them, the pre-closer can be a two-stage rotary valve; the pyrolysis closure can be a high-temperature resistant gate valve that automatically closes when the feed rhythm is zero; and the post-closer can be a star feeder.

[0049] The environmental regulator is set to automatically adjust the protective gas flow rate, valve opening, or mechanical seal clearance at the discharge end to maintain the discharge protection boundary within a safe range.

[0050] The cylinder is configured as two parallel cylinders, which alternately charge and discharge air to ensure an uninterrupted supply of protective air.

[0051] Specifically, for a single feed, the first sealing module determines the feed protection boundary of the protective gas based on the processing frequency; The reduced response processing frequency allows the pre-sealer to expand the feed protection boundary; With the increase in response processing frequency, the pre-sealer reduces the feed protection boundary; Among them, the feed protection boundary is the maximum position occupied by the protective gas in the separation module; The processing frequency is the corresponding frequency of the pyrolysis module under the current processing environment.

[0052] In particular, when the pyrolysis module processes only a single category of raw materials, such as solid raw materials, it can be set up with a single pyrolysis furnace. When processing several categories of raw materials, such as solid and liquid raw materials, it can be set up with a combination of pyrolysis furnace and combustion furnace, so that the liquid raw materials can be used as fuel to assist in heating the solid raw materials.

[0053] By setting up a pre-sealer, a pyrolysis sealer, and a cylinder before the pyrolysis module, protective gas is introduced according to the feeding status of the raw material, and the start and stop of the pyrolysis sealer are controlled according to the feeding rhythm. This allows the coverage of the protective gas to be dynamically matched with the actual working conditions of the pyrolysis module, ensuring the sealing effect while reducing unnecessary consumption of protective gas. Linking the protective gas storage with the feeding sealing function provides a hardware foundation for subsequent adjustment based on the processing frequency, thereby improving the stability of the feeding end sealing control.

[0054] In practice, the feed protection boundary is the length or volume of a gas seal zone formed by the protective gas (such as nitrogen) within the feed channel. When the processing frequency decreases, expanding this boundary means allowing the protective gas to occupy a longer pipeline space to enhance the sealing effect; when the processing frequency increases, the boundary is reduced to accelerate the feed rate.

[0055] The maximum feed stability boundary refers to the upper limit of the protective gas boundary that can be safely expanded. Exceeding this value will lead to excessive consumption of protective gas or affect normal feed. The minimum feed stability boundary refers to the lower limit of the protective gas boundary shrinkage. Below this value, the seal fails, and air may enter the pyrolysis module. These two boundaries are jointly determined by the equipment structure and operating pressure.

[0056] Specifically, the separation module responds to the expansion of the feed protection boundary by adjusting the feed rhythm according to the pressure of the pyrolysis module. If the pressure in the pyrolysis module decreases, the separation module accelerates the feeding pace; If the pressure in the pyrolysis module increases, the separation module slows down the feeding rhythm and adjusts the feeding rhythm of the pre-seal or pyrolysis seal according to the expansion or contraction of the feeding protection boundary. If the feed protection boundary expands beyond the maximum feed stability boundary, the separation module controls the pre-sealer to reduce the pressure of the protective gas. If the feed protection boundary shrinks to below the minimum feed stability boundary, the pyrolysis closure will close to stop the raw material from being fed to the pyrolysis module; Among them, the maximum and minimum feed stability boundaries are the rated working ranges of the pre-sealer, which are related to the working pressure of the pyrolysis module.

[0057] In particular, by adjusting the feeding rhythm according to the expansion or contraction of the feed protection boundary and the pressure of the pyrolysis module, the feeding rhythm is controlled in conjunction with the real-time pressure of the pyrolysis module and the rated working range of the closure, which effectively prevents the pyrolysis effect from decreasing or safety hazards caused by drastic pressure fluctuations, thereby improving the stability of the pyrolysis system.

[0058] In particular, the environmental regulator is equipped with a discharge threshold. The process regulator responds to the pressure change of the pyrolysis module and adjusts the discharge protection boundary to ensure that the discharge protection boundary does not exceed the discharge protection threshold. The environmental controller also responds to the discharge rhythm and adjusts the discharge threshold, including... In response to a decrease in the discharge rhythm, the discharge protection threshold is increased; In response to the increased discharge rhythm, the discharge protection threshold is lowered; The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

[0059] By setting up a post-sealer, environmental regulator, collector, and cylinder, the system can respond promptly to the processing frequency and adjust the discharge rhythm, ensuring that the action speed at the discharge end matches the processing capacity of the pyrolysis module. This keeps the discharge protection boundary within a controllable and safe range, preventing material accumulation or limited processing frequency due to untimely discharge, thereby improving the stability of the pyrolysis system.

[0060] The discharge protection boundary is the area formed at the discharge end by protective gas or mechanical structure to prevent air backflow. It is usually represented by the length of an air seal area or material seal area between the post-sealer and the pyrolysis module.

[0061] The discharge protection threshold is a preset safety upper limit in the environmental regulator. It can be set by the user during implementation. The discharge protection boundary must not exceed this threshold under any operating condition. When the discharge rate decreases, the threshold can be increased to allow for a larger sealing space; when the discharge rate increases, the threshold should be decreased to avoid hindering the discharge.

[0062] For example, under a certain working condition: The initial discharge protection threshold is set to 1.0 m; when the discharge rate decreases from 5 kg / min to 2 kg / min, the threshold is increased to 1.5 m.

[0063] At high load discharge (10 kg / min), the threshold is reduced to 0.5 m to ensure rapid discharge of pyrolysis carbon.

[0064] Specifically, in response to a decrease in the material discharge rhythm, the scheduling module adjusts the second closed module, whereby... If the processing frequency increases, the scheduling module determines that the discharge module is blocked and controls the second sealing module to purge the discharge module.

[0065] Specifically, the scheduling module adjusts the pyrolysis module based on the status of the separation module, wherein... If the feeding rate decreases, determine the status of the separation module and adjust the pyrolysis module to the processing frequency corresponding to the feeding rate. If the separation module does not supply raw materials, the scheduling module will expand the feed protection boundary of the first closed module to the maximum feed stability boundary and control the pyrolysis module to enter standby mode.

[0066] Please see Figure 2 As shown, it is a supply-side flow chart of the pyrolysis method of the present invention, including: Step Se1: Collect the feeding rhythm of the raw material and the processing frequency of the pyrolysis module; Step Se2: Determine the feed protection boundary of the protective gas based on the processing frequency; the feed protection boundary is the maximum position occupied by the protective gas in the separation module. Step Se3: In response to the decrease or increase of the processing frequency, the feed protection boundary is expanded or reduced. Step Se4: In response to the expansion or contraction of the feed protection boundary, the feed rhythm is adjusted according to the pressure of the pyrolysis module, wherein... Se4a responds to the pressure reduction in the pyrolysis module, accelerating the feeding pace; Se4b responds to the pressure increase in the pyrolysis module by slowing down the feeding rhythm and adjusting the pre-seal or pyrolysis seal according to the changing direction of the feeding protection boundary. Step Se5: In response to the feed protection boundary expanding beyond the maximum feed stability boundary, the pressure of the protective gas is reduced. When the feed protection boundary shrinks below the minimum feed stability boundary, the feeding of raw materials is stopped; Among them, the feeding rhythm is the frequency at which a unit mass of raw material enters the processing system; The maximum and minimum feed stability boundaries are the rated operating ranges of the pre-sealer, which are related to the operating pressure of the pyrolysis module.

[0067] Please see Figure 3 The diagram shown is a flow chart of the discharge side of the pyrolysis method of the present invention, including: Step So1: Collect the discharge rhythm of the pyrolysis material and the processing frequency of the pyrolysis module; Step So2: Respond to the discharge rhythm and close the discharge environment of the pyrolysis module; Step So3: In response to the pressure change in the pyrolysis module, the discharge protection boundary is adjusted to ensure that the discharge protection boundary does not exceed the preset discharge protection threshold. Step So4: In response to changes in the discharge rhythm, adjust the discharge protection threshold. In step So4a, if the discharge rhythm decreases, the discharge protection threshold is increased. In step So4b, if the discharge rhythm increases, lower the discharge protection threshold. Step So5: In response to the decrease in the discharge rhythm, determine the change in processing frequency. If the processing frequency increases, the discharge module is determined to be blocked, and the discharge module is purged. The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

[0068] Example 1: Waste paint residue generated in automotive painting workshops has a moisture content of about 30% and contains benzene compounds, resins, and a small amount of organic solvents. It belongs to HW12 category hazardous waste in the National Hazardous Waste List.

[0069] System configuration: The first sealing module includes a pre-sealing device (two-stage rotary valve), a pyrolysis sealing device (high-temperature gate valve), and a 200 L nitrogen storage tank (cylinder); the second sealing module includes a post-sealing device (water-cooled spiral seal), an environmental regulator (with PID controller), and a collector. The processing flow and regulation method are as follows: 1. Waste paint residue is collected from the painting workshop and sent to the separation module. After crushing, screening and dewatering, uniform raw material with a particle size ≤10 mm is obtained and the moisture content is reduced to below 15%.

[0070] 2. The data acquisition module determines the current feeding rhythm as 8 kg / min (unit mass is 1 kg, corresponding frequency is 0.133 Hz) by using the material level sensor on the pre-sealed device and the rotation speed feedback of the rotary valve.

[0071] The first closed module determines the feed protection boundary of the protective gas based on the current processing frequency of the pyrolysis module (set to 10 kg / min). The initial feed protection boundary is set to 0.8 m (i.e., the gas seal length occupied by nitrogen in the outlet pipe of the separation module).

[0072] When the processing frequency is reduced from 10 kg / min to 7 kg / min (due to fluctuations in the calorific value of waste paint residue), the pre-sealing device automatically expands the feed protection boundary from 0.8 m to 1.2 m to prevent air backflow. At the same time, the cylinder releases nitrogen to maintain the oxygen concentration in the separation module below 2%.

[0073] 3. The raw material enters the pyrolysis module (rotary pyrolysis furnace) through the pyrolysis sealer, and is pyrolyzed at 450~550℃ under anaerobic conditions for approximately 30 minutes. The combustible gas produced by pyrolysis is purified and reused for combustion and heating, while the pyrolysis char is discharged as solid pyrolysis feed.

[0074] 4. After pyrolysis is completed, the post-sealing device (water-cooled spiral seal) pushes the pyrolyzed char towards the discharge module at a discharge rate of 4 kg / min. The data acquisition module monitors the discharge rate in real time.

[0075] The environmental regulator detected that the pressure inside the pyrolysis module fluctuated from a slightly positive pressure (+50 Pa) to -30 Pa. To prevent air from being sucked in, it automatically adjusted the discharge protection boundary from 0.5 m to 0.8 m and ensured that it did not exceed the current discharge protection threshold (initially set to 1.0 m).

[0076] Due to the low discharge rate (4 kg / min), the environmental regulator raises the discharge protection threshold from 1.0 m to 1.3 m, allowing for a larger sealing space to enhance the sealing effect.

[0077] 5. The scheduling module compares the feeding rate (8 kg / min), discharging rate (4 kg / min), and processing frequency (7 kg / min) in real time. It was found that the discharging rate was significantly lower than the processing frequency, and the processing frequency was higher than the discharging rate, indicating that there was a risk of blockage in the discharging module.

[0078] The scheduling module controls the second sealing module to start the purging procedure: the rear sealing device is closed, and the discharge spiral pipe is purged with a nitrogen pulse of 0.6 MPa for 10 seconds to clear the blockage caused by the accumulation of pyrolysis carbon fine powder. After purging, the discharge rate returns to 7 kg / min, matching the processing frequency.

[0079] In addition, in case of abnormal operating conditions, such as: When the separation module temporarily stops supplying waste paint residue (feeding rhythm drops to 0), the scheduling module expands the feeding protection boundary of the first closed module to the maximum feeding stability boundary (1.5 m) and controls the pyrolysis module to enter standby mode (heat preservation at 300℃, feeding stopped), and automatically restarts after the original material is restored.

[0080] Example 2: Oily rags (HW08 type) from the automotive stamping workshop are mixed with waste sealant (HW13 type) from the welding workshop at a mass ratio of 3:1. The mineral oil content is approximately 20%, and the waste sealant is a high-molecular-weight polyurethane, which is highly viscous and prone to clumping.

[0081] Based on Example 1, the difference is that the pre-sealer in the first sealing module adopts a spiral extrusion seal (instead of a rotary valve) to deal with highly viscous raw materials; The second sealing module is equipped with a pulse backflush device.

[0082] 1. The raw materials are first crushed to a particle size of ≤20 mm by a shear crusher, and then the metal scraps are separated by a vibrating screen (for recycling). The remaining organic raw materials are mixed with a small amount of lime powder in a mixing tank to reduce viscosity.

[0083] 2. Due to the stickiness of the waste sealant, the separation module adopts batch feeding: a batch of material is fed every 2 minutes, with each batch weighing 12 kg, which is equivalent to a feeding rate of 6 kg / min.

[0084] The current processing frequency of the pyrolysis module is 5 kg / min (due to the slow pyrolysis of the sealant). At lower processing frequencies (5 kg / min < 6 kg / min), the first sealing module expands the feed protection boundary from 0.6 m to 1.1 m to enhance the airtight seal.

[0085] At the same time, the output pressure of the cylinder (nitrogen storage tank) was adjusted from 0.4 MPa to 0.6 MPa to maintain a slight positive pressure inside the separation module.

[0086] 3. The internal pressure of the pyrolysis module increases to +200 Pa due to the gas generated by the rapid pyrolysis of the sealant. The separation module slows down the feeding rate: the feeding rate is reduced from 6 kg / min to 4.5 kg / min, and the screw speed of the pre-sealing device is adjusted.

[0087] The feed protection boundary was maintained at 0.9 m throughout the adjustment process (between the minimum stable boundary of 0.3 m and the maximum stable boundary of 1.5 m). Once the pressure returned to normal, the feed rate was increased again.

[0088] 4. After pyrolysis, the pyrolysis material mainly consists of fibrous carbides and calcium carbonate residue, with an initial discharge rate of 4 kg / min. The acquisition module detected that the discharge rate was lower than the processing frequency (5 kg / min), and the discharge protection boundary had reached the current threshold of 0.9 m.

[0089] The environmental regulator responds to the reduced discharge rhythm by raising the discharge protection threshold from 0.9 m to 1.2 m and allowing the post-sealer to increase the air seal length to 1.1 m to prevent air from entering and causing spontaneous combustion of pyrolytic carbon.

[0090] 5. After 2 hours of operation, the acquisition module detected that the discharge rate had further decreased to 2 kg / min, while the pyrolysis module's processing frequency remained at 5 kg / min. The scheduling module determined that the discharge module was blocked and immediately initiated purging: the discharge screw and pipeline were pulsed with 0.8 MPa nitrogen three times, each time for 5 seconds. After purging, the discharge rate returned to 4.5 kg / min.

[0091] In addition, in case of abnormal operating conditions, such as: Due to a temporary failure of the upstream separation module (no raw material supply within 10 minutes), the scheduling module expands the feed protection boundary of the first closed module to the maximum stable boundary of 1.5m and controls the pyrolysis module to enter standby mode (the temperature drops to 350℃ and the main burner is stopped).

[0092] After the fault was cleared, the system automatically detected that the feeding rhythm had been restored, and the pyrolysis module was heated back to 500°C. The entire process required no manual intervention.

[0093] In another embodiment, automobile production generates a mixed hazardous waste consisting of sludge, water-based paint residue, contaminated debris, and organic solvents, the solid raw materials of which include: (1) The oily sludge produced by the wastewater treatment plant has a water content of about 40% and an oil content of 15%; (2) The water-based paint residue generated in the painting workshop has a water content of about 35% and contains resin and pigment; (3) Contaminated debris generated in the final assembly workshop, including oily waste rags, waste gloves, waste cardboard, etc.; The proportions are as follows: The mixture of sludge, paint residue, and contaminated debris in a ratio of 2:1:1 has a total calorific value of approximately 12 MJ / kg and a moisture content of approximately 30%.

[0094] Its liquid raw materials include: waste organic solvents generated during automobile production, mainly composed of toluene, xylene, ethyl acetate, etc., with a calorific value of about 35 MJ / kg and a water content of <5%.

[0095] In this embodiment, the system includes: The separation module includes a crusher, a vibrating screen, a mixing bin, and a screw conveyor.

[0096] The pyrolysis module consists of a pyrolysis carbonization furnace and a pyrolysis gas combustion furnace, with an operating temperature of 500~850℃ and a slight negative pressure (-90~-20 Pa) maintained inside the furnace.

[0097] The pyrolysis gas combustion furnace is connected to the pyrolysis carbonization furnace and is used to burn the combustible gas produced by pyrolysis and to supplement external fuel; In this embodiment, the waste organic solvent is atomized and directly injected into the combustion chamber as auxiliary fuel.

[0098] The first sealing module includes a pre-sealing device (two-stage star-shaped feed valve), a pyrolysis sealing device (high-temperature gate valve), and a nitrogen storage tank (cylinder, volume 300 L).

[0099] The second enclosure module includes a post-enclosure (star-shaped feed valve), an environmental regulator (with pressure sensor and PID controller), and a pyrolysis carbon collector.

[0100] The processing procedure is as follows: The three solid raw materials are fed into the separation module respectively: The sludge is dewatered by pressure filtration to a moisture content of less than 30%; water-based paint residue is crushed and screened to remove large foreign objects; contaminated impurities are crushed by a shear crusher to a particle size of ≤15 mm.

[0101] Subsequently, the mixtures were thoroughly mixed in a blending bin at a mass ratio of 2:1:1 to obtain a mixed solid raw material.

[0102] The data acquisition module determines the feeding rhythm of the mixed solid raw materials by measuring the rotation speed and the conveying rate per unit time of the pre-closed valve (star-shaped feed valve).

[0103] Waste organic solvents are stored in a dedicated tank and filtered through a precision filter before being pumped by a high-pressure pump to an atomizing spray gun at the top of the combustion chamber. Compressed air is used as the atomizing medium, and the atomized droplet diameter is ≤50 μm to ensure thorough mixing and combustion with air.

[0104] In this embodiment, the target feeding rate is set to 8 kg / min (unit mass is 1 kg, corresponding to a frequency of 0.133 Hz). Since the feeding is continuous, the acquisition module monitors the actual feeding rate in real time, and the fluctuation range is allowed to be ±0.5 kg / min.

[0105] The supply rhythm of liquid raw materials is adjusted by the scheduling module according to the heat demand of the pyrolysis module. In this embodiment, the initial liquid raw material supply rhythm is set to 2 kg / min.

[0106] A. Based on the current processing frequency of the pyrolysis carbonization furnace (set at 10 kg / min, i.e., the designed processing capacity of the pyrolysis furnace), the first closed module determines the feed protection boundary of the protective gas (nitrogen). The initial feed protection boundary is set to 1.0 m, which is the gas seal length occupied by nitrogen in the discharge pipe of the separation module.

[0107] When the processing frequency of the pyrolysis carbonization furnace drops from 10 kg / min to 7 kg / min due to fluctuations in the moisture content of the solid raw material, the first sealing module automatically responds: the processing frequency is reduced, and the feed protection boundary is expanded. The pre-sealing device expands the nitrogen gas seal length from 1.0 m to 1.4 m, while the cylinder increases the nitrogen output flow rate (from 50 L / min to 80 L / min) to ensure that air is not drawn back into the pyrolysis furnace through the feed inlet.

[0108] B. The pressure inside the pyrolysis carbonization furnace fluctuates due to the gas generated by the pyrolysis of the solid raw materials. The data acquisition module monitors the furnace pressure in real time. When the furnace pressure is detected to rise from a slight negative pressure (-30 Pa) to +80 Pa (due to the high proportion of paint sludge in the feed mix, which accelerates the rate of pyrolysis gas generation), the separation module slows down the feeding rate: the feeding rate of solid raw materials is reduced from 8 kg / min to 5 kg / min, while the rotation speed of the star-shaped feed valve of the pre-closure device is adjusted. During this process, the feed protection boundary is maintained at 1.2 m with the assistance of the environmental regulator (between the minimum stable boundary of 0.4 m and the maximum stable boundary of 1.6 m).

[0109] When the pressure inside the furnace drops to -20 Pa, the feeding rate is gradually restored to 8 kg / min.

[0110] If the feed protection boundary expands to exceed the maximum feed stability boundary (1.6 m), the system automatically reduces the protective gas pressure (from 0.5 MPa to 0.3 MPa) to prevent excessive nitrogen consumption; if it shrinks to below the minimum feed stability boundary (0.4 m), the pyrolysis sealer automatically closes, stopping the solid raw material conveying until the boundary returns to a safe range.

[0111] C. The pyrolysis gas combustion furnace provides heat to the pyrolysis carbonization furnace. The scheduling module adjusts the supply rhythm of liquid organic solvent in real time based on the actual processing frequency of the pyrolysis carbonization furnace, the calorific value of the solid raw material, and furnace temperature changes. When the solid raw material feeding rate is 8 kg / min and the processing frequency is 7 kg / min, the amount of combustible gas generated by pyrolysis is insufficient to maintain the furnace temperature at 550℃. The scheduling module automatically increases the liquid raw material supply rate from 2 kg / min to 3.5 kg / min, increases the opening of the flow control valve of the atomizing spray gun, and the temperature of the pyrolysis gas combustion furnace rises.

[0112] When the calorific value of the solid raw material increases (e.g., the proportion of contaminants increases) and the furnace temperature exceeds 620°C, the scheduling module reduces the supply rate of liquid raw material to 1 kg / min, or even stops the supply, relying solely on pyrolysis gas to maintain combustion.

[0113] The atomization pressure of the liquid raw material is linked to the supply rhythm: when the supply rhythm is 3.5 kg / min, the atomizing air pressure is adjusted to 0.6 MPa; when the supply rhythm is 1 kg / min, the pressure is reduced to 0.3 MPa to ensure the atomization effect.

[0114] D. After pyrolysis, the solid raw material is converted into pyrolytic carbon (containing inorganic ash and fixed carbon), which is discharged through a post-sealing device (water-cooled spiral seal). The acquisition module determines the initial discharge rate to be 6 kg / min (compared to the feed rate of 8 kg / min, the discharge mass is reduced due to weight loss from pyrolysis).

[0115] The environmental regulator of the second closed module responds to pressure changes and discharge rhythm in the pyrolysis carbonization furnace, adjusting the discharge protection boundary. When the furnace pressure rises to +100 Pa due to the intense pyrolysis of the solid raw material, the environmental regulator shortens the discharge protection boundary from 0.6 m to 0.4 m to prevent high-temperature gas from escaping from the discharge end; at the same time, the discharge protection threshold automatically decreases from the initial 1.0 m to 0.8 m to ensure the safety of the discharge end seal.

[0116] When the discharge rate drops from 6 kg / min to 3 kg / min (e.g., due to pyrolytic carbon buildup in the screw conveyor), while the processing frequency remains at 7 kg / min, the scheduling module determines that the discharge module is blocked. The system immediately executes a purging procedure: the post-sealer is closed, and the discharge pipe is purged in reverse with a nitrogen pulse of 0.7 MPa for 15 seconds to clear the blockage. After purging, the discharge rate returns to 5.5 kg / min.

[0117] In addition, the scheduling module monitors the solid raw material feeding rate (8 kg / min), liquid raw material supply rate (2~3.5 kg / min), pyrolysis carbonization furnace processing frequency (7~10 kg / min), and discharge rate (5.5~6 kg / min) in real time and performs dynamic balancing. When the solid feed rate drops to 0 due to an upstream separation module malfunction, the scheduling module expands the feed protection boundary of the first closed module to the maximum stable feed boundary (1.6 m) and controls the pyrolysis carbonization furnace to enter standby mode (temperature drops to 400℃, main burner shuts down, only a small amount of pyrolysis gas is retained to maintain a slight negative pressure). At the same time, the liquid feed rate drops to 0.5 kg / min, only used to maintain the minimum temperature of the pyrolysis gas combustion furnace, and will automatically heat up and restart after the solid feed rate recovers.

[0118] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0119] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pyrolysis treatment system for hazardous waste in automobile production, comprising: A separation module used to separate raw materials; A pyrolysis module for pyrolyzing the raw material to form pyrolysis material; The discharge module is used to collect the pyrolysis material; Its characteristic is that it further includes: The data acquisition module, which includes several data collectors connected to the separation module, the pyrolysis module, and the discharge module, is used to determine the feeding rhythm of the raw material and... Used to determine the discharge rhythm of the pyrolysis material, and, Used to determine the processing frequency of the pyrolysis module; The first sealing module is used to seal the raw material into the pyrolysis module in response to the feeding rhythm; The second sealing module is used to respond to the discharge rhythm of the pyrolysis material and seal off the discharge environment of the pyrolysis module; The scheduling module is used to adjust the feeding rhythm and the processing frequency according to the discharge rhythm; The feeding rhythm is the frequency at which a unit mass of raw material enters the processing system. The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. For discontinuous feeding or discharging, the first closed module, which determines the feeding rhythm or the discharging rhythm based on the unit mass, includes: A pre-sealing device, which is connected to the separation module, is used to introduce protective gas according to the separation of the raw material by the separation module, and send the raw material to the corresponding pyrolysis module; A pyrolysis closure device, which is connected to the pyrolysis module and is located at the front end of the pyrolysis module, is used to open or stop the conveying of the raw material according to the feeding rhythm; A cylinder connected to the pre-sealer and the pyrolysis sealer is used to store the protective gas; The second enclosed module includes: A post-sealing device, which is connected to the pyrolysis module and the discharge module, is used to adjust the discharge rhythm in response to the processing frequency; An environmental regulator, connected to the rear closure, is used to adjust the discharge environment in response to the discharge rhythm; A collector connected to the discharge module for collecting the protective gas; A cylinder connected to the environmental conditioner and the collector; The post-sealing device is disposed between the pyrolysis module and the discharge module; Regarding the discharge rhythm, the rear closure pushes a unit mass of pyrolysis material to the discharge module. When the processing frequency increases, the rear closure accelerates the discharge rhythm.

2. The pyrolysis treatment system for hazardous waste in automobile production according to claim 1, characterized in that, For a single feed, the first sealing module determines the feed protection boundary of the protective gas according to the processing frequency; In response to the reduction in the processing frequency, the pre-sealer expands the feed protection boundary; In response to the increase in processing frequency, the pre-sealer reduces the feed protection boundary; Wherein, the feed protection boundary is the maximum position occupied by the protective gas in the separation module; The processing frequency is the corresponding frequency of the pyrolysis module under the current processing environment.

3. The pyrolysis treatment system for hazardous waste in automobile production according to claim 2, characterized in that, The separation module responds to the expansion of the feed protection boundary by adjusting the feed rhythm according to the pressure intensity of the pyrolysis module, wherein... If the pressure in the pyrolysis module decreases, the separation module accelerates the feeding rate; If the pressure of the pyrolysis module increases, the separation module slows down the feeding rhythm and adjusts the feeding rhythm of the pre-seal or pyrolysis seal according to the expansion or contraction of the feeding protection boundary. If the feed protection boundary expands to exceed the maximum feed stability boundary, the separation module controls the pre-sealer to reduce the pressure of the protective gas; If the feed protection boundary shrinks to below the minimum feed stability boundary, the pyrolysis closure device closes to stop the raw material from being fed to the pyrolysis module; The maximum feed stability boundary and the minimum feed stability boundary are the rated operating ranges of the pre-sealing device, which are related to the operating pressure of the pyrolysis module.

4. The pyrolysis treatment system for hazardous waste in automobile production according to claim 1, characterized in that, The environmental regulator is equipped with a discharge protection threshold. The process regulator responds to the pressure change of the pyrolysis module and adjusts the discharge protection boundary so that the discharge protection boundary does not exceed the discharge protection threshold. The environmental regulator also responds to the discharge rhythm by adjusting the discharge protection threshold, including: In response to a decrease in the discharge rhythm, the discharge protection threshold is increased; In response to an increase in the discharge rhythm, the discharge protection threshold is lowered; The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

5. The pyrolysis treatment system for hazardous waste in automobile production according to claim 3 or 4, characterized in that, In response to the reduction in the discharge rhythm, the scheduling module adjusts the second closed module, wherein... If the processing frequency is increased, the scheduling module determines that the discharge module is blocked and controls the second sealing module to purge the discharge module.

6. The pyrolysis treatment system for hazardous waste in automobile production according to claim 5, characterized in that, The scheduling module adjusts the pyrolysis module according to the state of the separation module, wherein... If the feeding rhythm decreases, determine the state of the separation module and adjust the pyrolysis module to a processing frequency corresponding to the feeding rhythm; If the separation module does not supply the raw material, the scheduling module expands the feed protection boundary of the first closed module to the maximum feed stability boundary and controls the pyrolysis module to enter standby mode.

7. A method for pyrolysis treatment of hazardous waste in automobile production, comprising the pyrolysis treatment system for hazardous waste in automobile production according to any one of claims 1-6, characterized in that, include: Step Se1: Collect the feeding rhythm of the raw material and the processing frequency of the pyrolysis module; Step Se2: Determine the feed protection boundary of the protective gas according to the processing frequency, and the feed protection boundary is the maximum position occupied by the protective gas in the separation module; Step Se3: In response to the decrease or increase of the processing frequency, expand or shrink the feed protection boundary; Step Se4: In response to the expansion or contraction of the feed protection boundary, the feed rhythm is adjusted according to the pressure regulation of the pyrolysis module, wherein... In response to the pressure reduction in the pyrolysis module, the feeding rhythm is accelerated; In response to the pressure increase in the pyrolysis module, the feeding rhythm is slowed down, and the pre-seal or pyrolysis seal is adjusted according to the changing direction of the feeding protection boundary; Step Se5: In response to the feed protection boundary expanding beyond the maximum feed stability boundary, reduce the pressure of the protective gas; When the feed protection boundary shrinks below the minimum feed stability boundary, the feeding of raw material is stopped; The feeding rhythm is the frequency at which a unit mass of raw material enters the processing system. The maximum and minimum feed stability boundaries are the rated operating ranges of the pre-sealing device, which are related to the operating pressure of the pyrolysis module.

8. A method for pyrolysis treatment of hazardous waste in automobile production, comprising the pyrolysis treatment system for hazardous waste in automobile production according to any one of claims 1-6, characterized in that, include: Step So1: Collect the discharge rhythm of the pyrolysis material and the processing frequency of the pyrolysis module; Step So2: In response to the discharge rhythm, the discharge environment of the pyrolysis module is closed. Step So3: In response to the pressure change of the pyrolysis module, adjust the discharge protection boundary so that the discharge protection boundary does not exceed the preset discharge protection threshold. Step So4: In response to the change in the discharge rhythm, adjust the discharge protection threshold. If the discharge rate decreases, the discharge protection threshold should be increased. If the discharge rate is increased, the discharge protection threshold is reduced; Step So5: In response to the decrease in the discharge rhythm, determine the change in the processing frequency. If the processing frequency is increased, the discharge module is determined to be blocked, and the discharge module is purged. The discharge rhythm is the frequency at which the processing system completes the processing of a unit mass of pyrolysis material. The discharge protection boundary is the boundary that the pyrolysis module can seal under operating conditions.

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