Hazardous waste treatment device

Abstract

The embodiment of the utility model discloses a hazardous waste treatment device which comprises a tank body used for waste liquid reaction, and a hazardous waste inlet and a medicament inlet are formed in the upper portion of the tank body; a cooling water inlet is formed in the upper part of the side wall of the tank body, a hollow flowing channel is formed in the side wall of the tank body, a cooling water outlet is formed in the lower part of the tank body, and the flowing channel is respectively connected with the cooling water inlet and the cooling water outlet; the cooling water supply equipment is connected with the cooling water inlet; the monitoring system is used for monitoring a reaction state in the tank body and is connected with a detector arranged in the tank body; and the automatic control system is used for adjusting the reaction state in the tank body. By the adoption of the technical scheme, potential safety hazards in the hazardous waste disposal process can be found in the first time, and measures can be taken in time to prevent accidents. The life and property safety in production is effectively guaranteed, and the green and environment-friendly development requirements are met.

Description

Technical Field

[0001] This application belongs to the technical field of hazardous waste disposal, and specifically relates to a hazardous waste treatment device. Background Art

[0002] In the hazardous waste disposal industry, the physical and chemical disposal method is generally adopted for acidic hazardous waste, mainly the acid-base neutralization reaction. A large amount of heat will be released during the reaction process. The release of a large amount of heat in a short time is likely to cause the temperature of the tank body to be too high and the waste liquid in the tank to boil and overflow. Especially when disposing of hazardous waste with low flash point, high calorific value, and high acidity, accidents such as fire and explosion are likely to occur, and there are also problems such as chemical leakage and release of harmful gases.

[0003] Traditional hazardous waste treatment devices lack effective safety protection devices, which pose great safety hazards in actual production and threaten personal, property, and environmental safety. Summary of the Utility Model

[0004] This application aims to provide a hazardous waste treatment device to solve the problems existing in the prior art, that is, there is a lack of effective monitoring and protection devices in the hazardous waste disposal link, and accidents such as fire and explosion are likely to occur when disposing of hazardous waste with low flash point, high calorific value, and high acidity.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of this application provides a hazardous waste treatment device, including:

[0007] A tank body for waste liquid reaction, with a hazardous waste inlet and a reagent inlet arranged above the tank body; a cooling water inlet is arranged above the side wall of the tank body, a hollow flow channel is arranged in the side wall of the tank body, a cooling water outlet is arranged below the tank body, and the flow channel is respectively connected to the cooling water inlet and the cooling water outlet;

[0008] A cooling water supply device, which is connected to the cooling water inlet;

[0009] A reaction state monitoring system for monitoring the inside of the tank body, and the monitoring system is connected to a detector arranged inside the tank body;

[0010] An automatic control system for adjusting the reaction state inside the tank body.

[0011] Optionally, the side wall of the tank body includes an outer shell and an inner shell, the flow channel is cylindrical, the flow channel is arranged between the outer shell and the inner shell, and spirally surrounds the inner shell.

[0012] Optionally, the hazardous waste treatment device further includes a hazardous waste diversion pipe, one end of the hazardous waste diversion pipe is connected to the hazardous waste inlet, and the other end of the hazardous waste diversion pipe extends into the interior of the tank and is close to the bottom of the tank.

[0013] Optionally, the detector includes at least one of a thermometer, a liquid level gauge, and a combustible gas detector.

[0014] Optionally, the hazardous waste treatment device further includes a nitrogen diversion pipe and a liquefied nitrogen storage tank; a first electronic valve is provided on the nitrogen diversion pipe, one end of the nitrogen diversion pipe is connected to the tank, and the other end of the nitrogen diversion pipe is connected to the liquefied nitrogen storage tank; the first electronic valve is electrically connected to the automatic control system.

[0015] Optionally, the outlet of the nitrogen diversion pipe extending into the tank is close to the top of the tank.

[0016] Optionally, the cooling water supply device includes a water pump and a cooling water pipe, and the outlet of the cooling water pipe is connected to the cooling water inlet;

[0017] The water pump is electrically connected to the automatic control system, and the water pump is used to pump cooling water into the flow channel when it is working.

[0018] Optionally, an exhaust gas outlet is further provided at the top of the tank.

[0019] Optionally, the chemical agent inlet includes a chemical agent diversion pipe and a second electronic valve, and the second electronic valve is provided on the chemical agent diversion pipe; the second electronic valve is electrically connected to the automatic control system.

[0020] Optionally, the hazardous waste treatment device further includes a third electronic valve provided outside the tank, the third electronic valve is provided on the pipeline of the hazardous waste inlet, and the third electronic valve is electrically connected to the automatic control system.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] An embodiment of the present application provides a hazardous waste treatment device, including: a tank body for waste liquid reaction, with a hazardous waste inlet and a reagent inlet arranged above the tank body; a cooling water inlet arranged above the side wall of the tank body, a hollow flow channel arranged in the side wall of the tank body, and a cooling water outlet arranged below the tank body, the flow channel being respectively connected to the cooling water inlet and the cooling water outlet; a cooling water supply device, the cooling water supply device being connected to the cooling water inlet; a reaction state monitoring system for monitoring the inside of the tank body, the monitoring system being connected to a detector arranged inside the tank body; and an automatic control system for adjusting the reaction state inside the tank body. By adopting the technical solution of the present application, the monitoring system is electrically connected to the detector arranged inside the tank body, feeds back indicators associated with safety accidents, monitors the reaction state inside the tank body in real time, transmits data to the automatic control system, and the automatic control system issues an alarm in time when the monitored data exceeds the threshold, automatically issues instructions to relevant equipment, takes corresponding safety prevention measures, starts the cooling water supply device to cool down, and prevents the tank body from overheating and exploding. It can discover potential safety hazards in the hazardous waste disposal process in a timely manner and take measures to prevent accidents. It effectively guarantees the life and property safety in production and meets the development requirements of green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0024] Figure 1 is a schematic diagram of a hazardous waste treatment device according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a cooling water flow channel according to an embodiment of the present invention.

[0026] REFERENCE SIGNS:

[0027] 100: tank body; 110: side wall of the tank body; 111: outer shell; 112: inner shell; 120: hazardous waste inlet; 121: hazardous waste diversion pipe; 122: third electronic valve; 130: reagent inlet; 131: reagent diversion pipe; 132: second electronic valve; 140: cooling water inlet; 150: flow channel; 160: cooling water outlet; 170: exhaust gas outlet; 180: agitator; 20: monitoring system; 21: thermometer; 22: liquid level gauge; 23: combustible gas detector; 300: automatic control system; 311: nitrogen diversion pipe 312: liquefied nitrogen storage tank; 313: first electronic valve; 320: cooling water supply device; 321: water pump: 322: cooling water pipe; 40: control terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of the present utility model.

[0029] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a hazardous waste treatment device, which includes a tank body 100, a cooling water supply device 320, a reaction state monitoring system 20, and an automatic control system 300. Among them, the tank body 100 is used for the reaction of waste liquid. A hazardous waste inlet 120 and a reagent inlet 130 are arranged above the tank body 100; a cooling water inlet 140 is arranged above the side wall 110 of the tank body. A hollow flow channel 150 is arranged in the side wall 110 of the tank body. A cooling water outlet 160 is arranged below the tank body. The flow channel 150 is respectively connected to the cooling water inlet 140 and the cooling water outlet 160; the cooling water supply device 320 is connected to the cooling water inlet 140; the reaction state monitoring system 20 for monitoring the reaction state in the tank body is connected to the detector arranged in the tank body 100; the automatic control system 300 is used to adjust the reaction state in the tank body 100.

[0030] Waste liquid is added to the tank body 100 through the hazardous waste inlet 120, and reagents are added through the reagent inlet 130 for acid-base neutralization reaction. During the reaction process, the monitoring system 20 monitors the changes in the temperature and liquid level height in the tank body 100 through the detection instrument in the tank body 100 and feeds the monitoring data back to the automatic control system 300 in real time. The automatic control system 300 can take various measures to control the reaction state of the reactants including the reaction speed and the reaction intensity, and adjust the environment around the reaction device. When the monitoring data received by the automatic control system 300 from the monitoring system 20 exceeds the threshold value, an alarm is immediately issued, and instructions are sent to the relevant devices connected to the control terminal 40 to take corresponding measures to adjust the reaction state in the tank body 100 until the monitoring data returns to the safe range. When the reaction temperature is too high, the cooling water supply device 320 is started, and cooling water is injected into the hollow flow channel 150 located in the side wall 110 of the tank body through the cooling water inlet 140. The cooling water flows around the tank body 100 and is discharged through the cooling water outlet 160 at the bottom, playing a role in cooling the tank body 100 and the internal reaction liquid and reducing the reaction temperature.

[0031] In addition, in some optional embodiments, the side wall 110 of the tank body 100 includes an outer shell 111 and an inner shell 112. The flow channel 150 is cylindrical and is arranged between the outer shell 111 and the inner shell 112 and spirally surrounds the inner shell 112.

[0032] As Figure 2 shown, there is a hollow cavity in the side wall 110 of the tank body 100 in the embodiment of the present utility model. While playing a heat insulation role, a cooling water flow channel 150 is arranged in the cavity. The flow channel 150 is a cylindrical pipe, which is respectively connected to a cooling water inlet 140 and a cooling water outlet 160. The flow channel 150 is spirally wound around the inner layer shell 112.

[0033] In some other embodiments, the positions of the cooling water inlet 140 and the cooling water outlet 160 can be exchanged, and the cooling water flows reversely, flowing in from the bottom of the tank body 100, flowing around the tank body towards the height, and flowing out from the top of the tank body 100. At the same time, a water stop valve for preventing the reverse flow of the cooling water is arranged at the bottom inlet. For the cooling water system arranged in this way, under the action of gravity, the cooling water can be fully contacted with the tank body 100, expanding the contact area and having a better cooling effect.

[0034] In addition, in some optional embodiments, a hazardous waste diversion pipe 121 is further included. One end of the hazardous waste diversion pipe 121 is connected to a hazardous waste inlet 120, and the other end of the hazardous waste diversion pipe 121 extends into the tank body 100 and is close to the bottom of the tank body 100.

[0035] As Figure 1 shown, the waste liquid flows in from the hazardous waste inlet located at the top of the tank body 100, and flows reversely through the hazardous waste diversion pipe 121 to the bottom of the tank body 100 and then flows out. When the flow rate is relatively large, the liquid is likely to splash around when flowing out. When pouring directly downward from a high place, it will impact on the bottom of the tank body 100 or the liquid surface in the tank under the action of gravity, resulting in the splashing of the liquid. The waste liquid contained in the hazardous waste disposal device is often a high-temperature and high-acidity liquid, which has strong corrosiveness and sometimes contains toxic substances. Arranging the hazardous waste diversion pipe 121 can make the waste liquid be injected into the tank body 100 smoothly, avoiding the splashing of the waste liquid and hurting people.

[0036] In addition, in some optional embodiments, the detector includes at least one of a thermometer 21, a liquid level gauge 22, and a combustible gas detector 23.

[0037] As Figure 1As shown, a thermometer 21 and a liquid level gauge 22 are installed in the reaction chamber inside the tank body 100, and a combustible gas detector 23 is set in the external environment of the tank body 100. The above detectors are all connected to the monitoring system 20 to transmit monitoring data in real time, playing a role in monitoring the reaction state inside the tank body 100 and the external environment. The thermometer 21 extends into the inside of the tank body 100 and is close to the bottom of the tank body 100. Usually, the reaction temperature is the highest inside the liquid. The temperature data collected inside the liquid can be considered as the real-time highest temperature inside the tank body 100, ensuring that there is sufficient safety redundancy for the set safety threshold. The liquid level gauge 22 is installed at the top outlet of the tank body 100. When the liquid level is low, there is no hidden danger of liquid overflow accident, and it is not necessary to record the low liquid level value. Only monitoring the high liquid level value is sufficient to prevent the liquid overflow accident, which can reduce the invalid data sent to the terminal 40 and reduce the computing pressure on the server.

[0038] In addition, in some optional embodiments, the hazardous waste treatment device further includes a nitrogen gas diversion pipe 311 and a liquefied nitrogen storage tank 312; a first electronic valve 313 is provided on the nitrogen gas diversion pipe. One end of the nitrogen gas diversion pipe 311 is connected to the tank body 100, and the other end of the nitrogen gas diversion pipe 311 is connected to the liquefied nitrogen storage tank 312; the first electronic valve 313 is electrically connected to the automatic control system 300.

[0039] In addition, in some optional embodiments, the nitrogen gas diversion pipe 311 extends into the outlet of the tank body 100 and is close to the top of the tank body 100.

[0040] As Figure 1 shown, the nitrogen gas diversion pipe 311, the liquefied nitrogen storage tank 312 and the first electronic valve 313 together constitute a security nitrogen gas system. The liquefied nitrogen storage tank 312 stores low-temperature liquid nitrogen. When it is monitored that the reaction temperature inside the tank body 100 exceeds the safety threshold, the automatic control system 300 immediately instructs the first electronic valve 313 to open, and the liquid nitrogen enters the low-pressure environment and evaporates rapidly, absorbing the surrounding heat, thereby achieving a cooling effect. At the same time, nitrogen is also an inert gas. The evaporated nitrogen introduced into the tank body 100 can dilute the concentration of combustible gas and prevent high-temperature explosion accidents.

[0041] In addition, in some optional embodiments, the cooling water supply device 320 includes a water pump 321 and a cooling water pipe 322. The outlet of the cooling water pipe 322 is connected to the cooling water inlet 140; the water pump 321 is electrically connected to the automatic control system 300, and the water pump 321 is used to pump cooling water into the flow channel 150 when working.

[0042] The cooling water supply device 320 is connected to the automatic control system 300. When it is monitored that the temperature inside the tank body 100 exceeds the threshold value, the cooling program is automatically started, the water pump 321 is turned on, and the cooling water is pumped into the flow channel 150 to reduce the reaction temperature inside the tank body 100.

[0043] In some optional embodiments, an exhaust gas outlet 170 is further provided at the top of the tank body 100.

[0044] The exhaust gas outlet 170 can be connected to an exhaust gas absorption device to treat the combustible, toxic and harmful gases generated during the reaction, prevent the operators from being poisoned, and avoid environmental pollution.

[0045] Optionally, the chemical agent inlet 130 includes a chemical agent diversion pipe 131 and a second electronic valve 132, and the second electronic valve 132 is arranged on the chemical agent diversion pipe 131; the second electronic valve 132 is electrically connected to the automatic control system 300.

[0046] The second electronic valve 132 can receive the instructions of the automatic control system 300 and control the chemical agent flow rate according to the instructions to change the reaction rate in the tank body 100.

[0047] In addition, in some optional embodiments, a third electronic valve 122 arranged outside the tank body 100 is further included. The third electronic valve is arranged on the pipeline of the hazardous waste inlet 120, and the third electronic valve 122 is electrically connected to the automatic control system 300.

[0048] The third electronic valve 122 can receive the instructions of the automatic control system 300 and control the waste liquid flow rate according to the instructions to change the reaction rate in the tank body 100.

[0049] In the embodiments of the present utility model, the monitoring system 20 and the automatic control system 300 jointly constitute an emergency safety interlock system to establish a safety interlock mechanism. When the monitoring system 20 monitors that the reaction in the tank body 100 is too intense, and indicators such as temperature, liquid level height, and gas concentration exceed the critical values, and there are potential safety accident hazards, a signal is transmitted to the automatic control system 300. The automatic control system 300 immediately issues an alarm and starts corresponding hidden danger elimination measures. Taking the temperature, liquid level height, and combustible and toxic gas interlock as an example, the safety interlock mechanism configured by the hazardous waste treatment device in this application is introduced.

[0050] Temperature interlock:

[0051] Set a first-level alarm temperature and a second-level alarm temperature, where the first-level alarm temperature is lower than the second-level alarm temperature;

[0052] When the reaction temperature reaches the first-level alarm temperature, the automatic control system 300 issues an alarm to attract the attention of personnel;

[0053] When the reaction temperature reaches the secondary alarm temperature, the automated control system 300 issues an alarm to draw people's attention. The automated control system 300 closes the third electronic valve 122 of the hazardous waste inlet 120, stops the agitator 180, stops the chemical dosing and closes the valve 132, opens the first electronic valve 313 of the nitrogen storage tank 312 to introduce nitrogen into the tank body 100, and increases the extraction air volume of the exhaust gas outlet 170.

[0054] Liquid level interlock:

[0055] Set the primary alarm height and the secondary alarm height, where the primary alarm height is lower than the secondary alarm height;

[0056] When the liquid level reaches the primary alarm level, the automated control system 300 issues an alarm to draw people's attention;

[0057] When the liquid level reaches the secondary alarm level, the automated control system 300 issues an alarm to draw people's attention, closes the third electronic valve 122 of the hazardous waste inlet 120, stops the agitator 180, stops the chemical dosing and closes the valve 132.

[0058] Combustible and toxic gas interlock:

[0059] Set the primary alarm concentration and the secondary alarm concentration, where the primary alarm concentration is lower than the secondary alarm concentration;

[0060] When the gas concentration reaches the primary alarm concentration, the automated control system 300 issues an alarm to draw people's attention;

[0061] When the gas concentration reaches the secondary alarm concentration, the automated control system 300 issues an alarm to draw people's attention, the waste gas absorption system accelerates the emission of toxic and harmful gases, and the workshop exhaust system dilutes the air concentration in the workshop.

[0062] Design a two - level alarm mode according to the severity and urgency of the situation. The probability of a safety accident during the primary alarm is not very high, or even if an accident occurs, the consequences are relatively minor and do not require emergency treatment. Only an alarm is issued to draw people's attention to play a risk - warning role; the probability of a safety accident during the secondary alarm is very high and the situation is very urgent. If no measures are taken to eliminate the hidden danger, serious consequences will occur once an accident happens. At this time, the automated control system 300 automatically instructs the relevant treatment equipment to work, cooling down, shutting down and exhausting until the monitoring data returns to the safe range. The safety interlock mechanism introduced in this embodiment can issue an alarm when there is a safety risk, reminding relevant personnel to be vigilant or take certain measures, and automatically taking measures to eliminate safety hazards when the safety risk is relatively high, avoiding accidents caused by human factors such as staff negligence, unauthorized absence from duty or panicked operation mistakes in an emergency state.

[0063] An embodiment of the present application provides a hazardous waste treatment device, including: a tank body for liquid waste reaction, with a hazardous waste inlet and a reagent inlet provided above the tank body; a cooling water inlet provided above the side wall of the tank body, a hollow flow channel provided in the side wall of the tank body, and a cooling water outlet provided below the tank body, the flow channel being respectively connected to the cooling water inlet and the cooling water outlet; a cooling water supply device, the cooling water supply device being connected to the cooling water inlet; a reaction state monitoring system for monitoring the inside of the tank body, the monitoring system being connected to a detector provided inside the tank body; and an automatic control system for adjusting the reaction state inside the tank body. By adopting the technical solution of the present application, a monitoring system and an automatic control system are added to the existing hazardous waste treatment device. The monitoring system is electrically connected to the detection instruments provided inside the tank body, and feeds back important indicators such as temperature, liquid level height, gas concentration, etc. related to safety accidents, monitors the reaction state inside the tank body in real time, and transmits the data to the automatic control system; the automatic control system is electrically connected to devices that can directly control the reaction state inside the tank body, such as a dosing system, a stirring system, a security nitrogen system, a cooling water system, etc., and immediately issues an alarm when the received monitoring data exceeds the safe range, issues instructions to relevant devices, and takes corresponding safety precautions. It can discover potential safety hazards in the hazardous waste disposal process in a timely manner and take measures to prevent accidents. It effectively guarantees the life and property safety during production and meets the development requirements of green environmental protection.

[0064] It should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0065] Although the optional embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the optional embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0066] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any actual relationship or order between these entities. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the article or terminal device including the element.

[0067] The above has introduced the technical solution provided by this application in detail. Specific examples are used herein to elaborate on the principle and implementation manner of this application. At the same time, for those of ordinary skill in the art, according to the principle and implementation manner of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A hazardous waste treatment device, characterized in that: include: A tank body (100) is used for waste liquid reaction, wherein a hazardous waste inlet (120) and a reagent inlet (130) are arranged above the tank body (100); a cooling water inlet (140) is arranged above the side wall (110) of the tank body (100), a hollow flow channel (150) is arranged in the tank body side wall (110), and a cooling water outlet (160) is arranged below the tank body (100), wherein the flow channel (150) is respectively connected to the cooling water inlet (140) and the cooling water outlet (160); A cooling water supply device (320), the cooling water supply device (320) being connected to the cooling water inlet (140); A monitoring system (20) for monitoring the reaction state in the tank (100), wherein the monitoring system (20) is connected to a detector disposed in the tank (100); An automatic control system (300) for adjusting the reaction state in the tank (100).

2. The hazardous waste treatment device according to claim 1, characterized in that: The side wall (110) of the tank body (100) comprises an outer shell (111) and an inner shell (112); the flow channel (150) is cylindrical; the flow channel (150) is arranged between the outer shell (111) and the inner shell (112) and spirally surrounds the inner shell (112).

3. The hazardous waste treatment device according to claim 1, characterized in that: It also includes a hazardous waste diversion pipe (121), one end of which is connected to the hazardous waste inlet (120), and the other end of which extends into the interior of the tank body (100) and is close to the bottom of the tank body (100).

4. The hazardous waste treatment device according to claim 1, characterized in that: The detector comprises at least one of a thermometer (21), a liquid level meter (22), and a combustible gas detector (23).

5. The hazardous waste treatment device according to claim 1, characterized in that: It also comprises a nitrogen flow guide pipe (311) and a liquefied nitrogen storage tank (312); a first electronic valve (313) is arranged on the nitrogen flow guide pipe (311); one end of the nitrogen flow guide pipe (311) is connected to the tank body (100), and the other end of the nitrogen flow guide pipe (311) is connected to the liquefied nitrogen storage tank (312); and the first electronic valve (313) is electrically connected to the automatic control system (300).

6. The hazardous waste treatment device according to claim 5, characterized in that: The nitrogen flow guide pipe (311) extends into the outlet of the tank body (100) and is close to the top of the tank body (100).

7. The hazardous waste treatment device according to claim 1, characterized in that: The cooling water supply device (320) comprises a water pump (321) and a cooling water pipe (322), and the outlet of the cooling water pipe (322) is connected to the cooling water inlet (140); The water pump (321) is electrically connected to the automatic control system (300), and when in operation, the water pump (321) is used to pump cooling water into the flow channel (150).

8. The hazardous waste treatment device according to claim 1, characterized in that: The top of the tank body (100) is also provided with an exhaust gas outlet (170).

9. The hazardous waste treatment device according to claim 1, characterized in that: The medicine inlet (130) comprises a medicine guide tube (131) and a second electronic valve (132), wherein the second electronic valve (132) is arranged on the medicine guide tube (131); the second electronic valve (132) is electrically connected to the automatic control system (300).

10. The hazardous waste treatment device according to claim 1, characterized in that: It also includes a third electronic valve (122) arranged outside the tank body (100), the third electronic valve (122) being arranged on the pipeline of the hazardous waste inlet (120), and the third electronic valve (122) being electrically connected to the automatic control system (300).

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