Integrated system for waste gas collection and treatment and emergency ventilation of hazardous waste warehouse

Abstract

This utility model discloses an integrated system for the collection, treatment, and emergency ventilation of waste gas in a hazardous waste storage facility. The system includes a waste gas collection system, a waste gas treatment system, and a control system. The waste gas collection system comprises multiple horizontal ducts and multiple vertical ducts. Each horizontal duct has several first louvers, and the top of each vertical duct is connected to a horizontal duct. Each vertical duct also has several second louvers. The waste gas treatment system includes a first air path, a second air path, and an exhaust stack. The first air path has an activated carbon adsorption box, and the second air path has a first fan. The first air path is connected in parallel with a first bypass, and the second air path is connected in parallel with a second bypass. A second fan is installed on the second bypass air path. This integrated system can be used for the collection, treatment, and high-altitude emission of dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases in hazardous waste storage facilities. It also addresses the need for ventilation in dead corners of hazardous waste storage facilities, including the removal of flammable, explosive, toxic, and harmful gases, and for emergency ventilation in such facilities.

Description

Technical Field

[0001] This utility model belongs to the field of industrial ventilation and waste gas treatment technology, specifically relating to an integrated system for the collection, treatment and emergency ventilation of waste gas from hazardous waste storage facilities. Background Technology

[0002] According to relevant national design specifications: 1) Hazardous waste storage facilities that easily generate dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases should be equipped with gas collection devices and gas purification facilities; the height of the exhaust stacks of the gas purification facilities should meet relevant requirements; 2) For locations where large amounts of toxic gases or explosive gases may be suddenly released, emergency ventilation systems should be installed. The air intakes of the emergency ventilation systems should be located at the locations where the release of toxic gases or explosive substances may be greatest or where the accumulation is most likely to be highest. 3) If combustible gases cannot be discharged into the flare or device treatment system due to process conditions or medium characteristics, and are directly discharged into the atmosphere through exhaust stacks or vent pipes, the height of the exhaust stacks or vent pipes should meet the following requirements: the top of the exhaust stack or the vent pipe opening of the intermittently discharged gas should be more than 3.5m higher than the top of the platform or building within 10m, and platforms or buildings should not be arranged within a range of 45° above the horizontal distance of the discharge outlet; 4) For emergency bypasses that must be retained, automatic monitoring equipment such as flow meters should be installed.

[0003] Hazardous waste storage facilities are warehouse-style facilities used to store one or more types and forms of hazardous waste. Dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases generated by materials stored in hazardous waste storage facilities need to be collected and purified by an exhaust gas collection system. Simultaneously, flammable, explosive, toxic, and harmful gases that may be released or dispersed from materials stored in hazardous waste storage facilities in a short period of time should be quickly collected and discharged outdoors through an emergency ventilation system. However, due to the structure of hazardous waste storage facilities and the stacking of hazardous waste, dead zones can easily form within them. From an environmental perspective, dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases in these dead zones are difficult to collect; from an emergency ventilation perspective, flammable, explosive, toxic, and harmful gases in these dead zones are also difficult to remove through an emergency ventilation system. Therefore, it is necessary to install local diversion facilities to divert and exhaust these dust, VOCs, acid mist, toxic and harmful air pollutants, irritating odor gases, and flammable, explosive, toxic, and harmful gases from these dead zones.

[0004] Currently, for emergency ventilation in hazardous waste storage facilities, existing technologies often rely on a single fan to remove suddenly released flammable, explosive, toxic, and harmful gases. This method is relatively simplistic and prone to incomplete or inadequate removal of these gases from dead zones. Furthermore, it fails to meet the regulatory requirement that "the top of the intermittently emitting exhaust stack or vent should be at least 3.5 meters above the top of a platform or building within a 10-meter radius, and platforms or buildings should not be located within a 45° angle above the exhaust outlet at a horizontal distance of more than 10 meters." Additionally, some existing technologies use ductwork within the hazardous waste storage facility to guide flammable, explosive, toxic, and harmful gases from dead zones. However, this ductwork is prone to interference with the ductwork of the waste gas collection facilities within the facility, increasing the risk of collisions between different ducts, wasting ductwork materials, increasing facility investment, and raising the overall system complexity and maintenance costs.

[0005] For example, CN218046993U discloses an integrated device for treating waste gas from a hazardous waste storage facility. The device includes an integrated frame and an outer casing, as well as an air inlet, a primary filter section, a chemical filter section, a physical adsorption section, an air outlet, an electrical control system, an instrument box, a carbon filling port, a carbon discharge port, fire-fighting pipelines, a maintenance port for the primary filter section, a maintenance port for the electrical control system, a maintenance door for the electrical control cabinet, an internal maintenance port, a drain outlet, and a ladder. This device does not have a backup fan pipeline, resulting in low system reliability. Furthermore, in the event of an emergency, it cannot achieve the function and effect of emergency ventilation. CN212215075U discloses a waste gas treatment device for a hazardous waste temporary storage facility. The inlet of a blower is connected to the hazardous waste storage facility, and the blower outlet is divided into two paths. One path connects to the air inlet at the bottom of a scrubbing tower. The bottom of the scrubbing tower, a scrubbing pump, and a spray device are connected in sequence. The spray device is located in the upper part of the scrubbing tower, and an online pH meter is installed at the outlet of the scrubbing pump. Packing material is located below the spray device, and a demister is located above the spray device near the gas outlet of the scrubbing tower. The gas outlet of the scrubbing tower, the UV photolysis chamber, and the inlet of the activated carbon adsorption device are connected in sequence. The other path of the blower outlet is connected to a blower, which is connected to the inlet of an incinerator. The outlet of the activated carbon adsorption device and the outlet of the incinerator are connected to a tail gas treatment system. Neither of the two blower paths has a backup, resulting in low system reliability. Furthermore, in emergency situations, the system cannot provide adequate ventilation. Utility Model Content

[0006] To address both the environmental requirements for collecting and treating dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odors from hazardous waste storage facilities, and the emergency ventilation requirements for guiding and exhausting flammable, explosive, and toxic gases, this invention proposes an integrated system for hazardous waste storage facility exhaust gas collection, treatment, and emergency ventilation. This integrated system can both collect and treat hazardous waste storage facilities' exhaust gases and provide emergency ventilation, thus simultaneously meeting both environmental and emergency ventilation safety requirements. Furthermore, this integrated system avoids interference between ductwork systems with different functions, saves ductwork materials, and reduces system investment costs.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an integrated system for the collection, treatment, and emergency ventilation of waste gas in a hazardous waste storage facility, comprising a waste gas collection system, a waste gas treatment system, and a control system. The waste gas collection system is installed inside the hazardous waste storage facility and includes multiple horizontal ducts and multiple vertical ducts connected together and fixed to the inner wall of the hazardous waste storage facility. The multiple horizontal ducts are arranged horizontally along the inner wall or columns of the hazardous waste storage facility, and the multiple horizontal ducts are connected end to end to form a closed loop. Adjacent horizontal ducts converge at a corner. Each of the transverse ducts is provided with several first louvers. The multiple longitudinal ducts are arranged longitudinally at intervals along the multiple transverse ducts. The top of each longitudinal duct is connected to one of the transverse ducts. Each longitudinal duct is provided with several second louvers. The exhaust gas treatment system is located outside the hazardous waste storage area. The exhaust gas treatment system includes a first gas path, a second gas path, and an exhaust stack connected in series. The first gas path is connected to the circuit. An activated carbon adsorption box is provided on the first gas path. A first fan is provided on the second gas path. The first gas path is connected in parallel with a first bypass. The second gas path is connected in parallel with a second bypass. A second fan is provided on the second bypass gas path. The pipe on the outlet side of the first bypass and the pipe on the inlet side of the second bypass are merged into a common pipe. The common pipe is connected to the first gas path and the second gas path via a pipe tee. The on / off state and airflow of the first gas path, the second gas path, the first bypass, and the second bypass are controlled by the control system.

[0008] Subject to relevant regulatory requirements, the integrated system of this utility model can effectively collect and treat dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases generated in hazardous waste storage facilities. This system changes the existing single-fan emergency ventilation method by implementing airflow diversion measures in the dead corners of the hazardous waste storage facility, adding a flammable, explosive, toxic, and harmful gas exhaust system, and integrating two functional duct systems into one. This forms a system that can collect, treat, and discharge dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases from within the hazardous waste storage facility, while also addressing the exhaust of flammable, explosive, toxic, and harmful gases in the dead corners of the hazardous waste storage facility and meeting the emergency ventilation needs of the hazardous waste storage facility.

[0009] In this integrated system, multiple horizontal ducts are connected end-to-end to form a closed loop, which has a large gas throughput, thus helping to improve the efficiency of waste gas collection. This integrated system uses less duct material and has low cost.

[0010] The working principle of the integrated system of this utility model is as follows: Under normal circumstances, the control system turns on the first fan and / or the second fan, the first air path is opened, the first bypass is closed, and the second air path and / or the second bypass is opened. Dust, VOCs, acid mist, toxic and harmful air pollutants and irritating odor gases generated in the hazardous waste storage enter the waste gas collection system through the first louver and the second louver, and are introduced into the first air path. After purification by the activated carbon adsorption box, they are sent to the exhaust stack that meets the relevant specifications by the first fan and / or the second fan, and then discharged from the exhaust stack. The gas is discharged into the atmosphere, thus achieving the purpose of collecting and treating waste gas in the hazardous waste storage facility. In the event of an emergency, when a large amount of flammable, explosive, toxic, or harmful gases are suddenly released from the materials in the hazardous waste storage facility, the control system will activate the first and second fans and shut off the first gas path. The gas will enter the waste gas collection system through the first and second louvers and be guided to the first bypass. It will then be sent to the exhaust stack by the first and second fans and finally discharged into the atmosphere at high altitude through the exhaust stack. This achieves the purpose of ventilation in emergency situations in the hazardous waste storage facility and the removal of flammable, explosive, toxic, and harmful gases from dead corners of the hazardous waste storage facility.

[0011] Under normal circumstances, heavier and slightly heavier gases (dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases) are mainly collected through several 200-leaf vents, while lighter and slightly lighter gases (dust, VOCs, acid mist, toxic and harmful air pollutants, and irritating odor gases) are mainly collected through several 100-leaf vents. In emergency situations, heavier and slightly heavier gases (such as flammable, explosive, toxic, and harmful gases) are mainly collected through several 200-leaf vents, while lighter and slightly lighter gases (such as flammable, explosive, toxic, and harmful gases) are mainly collected through several 100-leaf vents.

[0012] According to current relevant regulations, the gas components in hazardous waste storage facilities are determined based on the ratio of their molecular weight to that of air. The specific principles are as follows: when the ratio is ≥1.2, it is determined to be a heavy component (gas is heavier than air); when the ratio is ≥1.0 and <1.2, it is determined to be a slightly heavy component; when the ratio is between 0.8 and 1.0 (excluding 0.8 and 1.0), it is determined to be a slightly light component; when the ratio is ≤0.8, it is determined to be a light component (gas is lighter than air).

[0013] Preferably, each of the longitudinal ducts is equipped with a second louver at its bottom end. This second louver is mainly used to collect heavy component gases. More preferably, the second louver in the middle of each longitudinal duct is installed at a height of 0.7-5m above the ground, and the second louver at the bottom of each longitudinal duct is installed at a height of 0.2-3m above the ground.

[0014] Preferably, each of the longitudinal ducts has a second louver at its middle and bottom. In this design, the second louver at the middle of the longitudinal duct is mainly used to collect slightly heavier and slightly lighter components, while the second louver at the bottom of the longitudinal duct is mainly used to collect heavier components.

[0015] Preferably, the opening size of the plurality of second louvers increases sequentially with increasing distance from the first fan. This design, by adjusting the opening size of the second louvers at different distances from the first fan, helps to improve the uniformity of gas collection volume within the system.

[0016] Preferably, a fire damper and a pressure transmitter are installed on the pipeline connecting the waste gas collection system and the first gas path. A filter is installed on the pipeline located at the inlet side of the activated carbon adsorption box. Differential pressure gauges are installed on both the inlet and outlet sides of the filter, the first fan, and the second fan, respectively. A temperature transmitter is installed on the activated carbon adsorption box. Several air volume regulating valves and several flow meters are installed on the first gas path, the second gas path, the first bypass, and the second bypass, respectively. The fire damper, pressure transmitter, differential pressure gauge, temperature transmitter, several air volume regulating valves, and several flow meters are electrically connected to the control system.

[0017] Preferably, the exhaust stack is equipped with a sampling platform and a sampling port. By sampling through the sampling port, the gas composition delivered to the exhaust stack can be monitored.

[0018] Preferably, the diameter of each horizontal duct and each vertical duct is 100~600mm, the installation height of each horizontal duct is 1.5~6m above the ground or the top of each horizontal duct is 0.5~4.5m above the top of the hazardous waste storage, the installation height of each vertical duct is 0.2~3m above the ground, the top of the exhaust stack is 15m or more above the ground level, the top of the exhaust stack is more than 3.5m above the top of any platform or building within a 10m range, and platforms or buildings should not be located within a 45° angle above the exhaust outlet at a horizontal distance of more than 10m.

[0019] Compared with the prior art, the present invention has the following advantages: 1) This utility model integrated system can be used for the collection, treatment and high-altitude emission of dust, VOCs, acid mist, toxic and harmful air pollutants and irritating odor gases in hazardous waste storage facilities, while also taking into account the drainage of flammable, explosive and toxic gases in the dead corners of hazardous waste storage facilities and the ventilation needs of emergency accidents in hazardous waste storage facilities. 2) This utility model integrated system is equipped with two fans (a first fan and a second fan). Under normal circumstances, when collecting and treating waste gas from the hazardous waste storage facility, the first fan and the second fan serve as backups for each other, improving the reliability of the system. In case of an emergency, the two fans can also complete emergency ventilation. 3) This utility model integrates two functional duct systems into one system, forming a system that can be used for the collection, treatment and high-altitude emission of dust, VOCs, acid mist, toxic and harmful air pollutants and irritating odor gases in hazardous waste storage, while also taking into account the ventilation needs of flammable, explosive and toxic gases in the dead corners of hazardous waste storage and emergency ventilation needs of hazardous waste storage. It can avoid the problems of mutual interference and collision between gas collection and exhaust ducts with different functions, and can save duct materials and reduce system investment costs. Attached Figure Description

[0020] Figure 1 This is a side view of the integrated system in the embodiment; Figure 2 This is a side view of the exhaust gas collection system in the embodiment; Figure 3 This is a top view of the integrated system in the embodiment; Figure 4 These are detailed views of the first and second louvers in the embodiment; The specific reference numerals in the figure are as follows: 11-Horizontal duct, 12-Longitudinal duct, 13-First louver, 14-Second louver, 21-First air passage, 22-Second air passage, 23-Exhaust stack, 24-Common pipe, 25-Activated carbon adsorption box, 26-First fan, 27-Second fan, 28-First bypass, 29-Second bypass, 31-Fire damper, 32-Pressure transmitter, 33-Filter, 34-Differential pressure gauge, 35-Temperature transmitter, 36-Air volume regulating valve, 37-Flow meter, 38-Pipe tee, 4-Hazardous waste storage, 41-Interior wall, 5-Sampling platform, 51-Sampling port. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components and structures not limited in the present invention all adopt conventional technical means in the art.

[0022] The embodiment of the integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation, such as Figures 1-3 As shown, the integrated system includes a waste gas collection system, a waste gas treatment system, and a control system. The waste gas collection system is located inside the hazardous waste storage 4 and includes multiple horizontal ducts 11 and multiple vertical ducts 12 that are connected as one unit and fixed to the inner wall 41 of the hazardous waste storage 4. The multiple horizontal ducts 11 are arranged horizontally along the inner wall 41 (or columns) of the hazardous waste storage 4, and the multiple horizontal ducts 11 are connected end to end to form a closed loop. Two adjacent horizontal ducts 11 intersect at the corner of the wall. Each horizontal duct 11 is provided with several first louvers 13. The multiple vertical ducts 12 are arranged longitudinally at intervals along the multiple horizontal ducts 11. The top of each vertical duct 12 is connected to a horizontal duct 11. Each vertical duct 12 has a second louver 14 installed at the middle and bottom. The opening size of the multiple second louvers 14 increases sequentially with the increase of their distance from the first fan 26. Figure 1 and Figure 2The openings of the four second louvers 14 located in the middle of the four longitudinal ducts 12, from right to left, increase in size sequentially. Similarly, the openings of the four second louvers 14 located at the bottom of the four longitudinal ducts 12, also from right to left, increase in size sequentially. The exhaust gas treatment system is located outside the hazardous waste storage 4. The exhaust gas treatment system includes a first air passage 21, a second air passage 22, and an exhaust stack 23 connected in series. The first air passage 21 is connected to a closed loop formed by multiple transverse ducts 11 connected end-to-end. A sampling platform 5 and a sampling port 51 are installed on the exhaust stack 23. The first air passage 21 is connected to the exhaust gas collection system. An activated carbon adsorption box 25 is installed on the first gas path 21, and a first fan 26 is installed on the second gas path 22. The first gas path 21 is connected in parallel with the first bypass 28, and the second gas path 22 is connected in parallel with the second bypass 29. A second fan 27 is installed on the gas path of the second bypass 29. The pipe on the outlet side of the first bypass 28 and the pipe on the inlet side of the second bypass 29 are merged into a common pipe 24. The common pipe 24 is connected to the first gas path 21 and the second gas path 22 via a pipe tee 38. The on / off state and gas flow of the first gas path 21, the second gas path 22, the first bypass 28 and the second bypass 29 are controlled by the control system.

[0023] In Example 1, a fire damper 31 and a pressure transmitter 32 are installed on the pipeline connecting the waste gas collection system and the first gas path 21. A filter 33 is installed on the pipeline located at the inlet side of the activated carbon adsorption box 25. Differential pressure gauges 34 are installed on both the inlet and outlet sides of the filter 33, the first fan 26, and the second fan 27, respectively. A temperature transmitter 35 is installed on the activated carbon adsorption box 25. Several airflow regulating valves 36 and several flow meters 37 are installed on the first gas path 21, the second gas path 22, the first bypass 28, and the second bypass 29, respectively. The fire damper 31, the pressure transmitter 32, the differential pressure gauge 34, the temperature transmitter 35, the several airflow regulating valves 36, and the several flow meters 37 are electrically connected to the control system. When the control system detects an excessive pressure difference through the differential pressure gauge 34, it shuts down the integrated system.

[0024] In Example 1, the diameter of each horizontal duct 11 and each vertical duct 12 is 100~600mm. The installation height of each horizontal duct 11 is 1.5~6m above the ground or the top of each horizontal duct 11 is 0.5~4.5m above the top of the hazardous waste storage 4. The installation height of each vertical duct 12 is 0.2~3m above the ground. The top of the exhaust stack 23 is 15m or more above the ground level. The top of the exhaust stack 23 is more than 3.5m above the top of any platform or building within a 10m range. Platforms or buildings should not be located within a 45° angle above the exhaust outlet of the exhaust stack 23, which is more than 10m above the ground. The installation height of the second louver 14 in the middle of each vertical duct 12 is 0.7~5m above the ground, and the installation height of the second louver 14 at the bottom of each vertical duct 12 is 0.2~3m above the ground. The cross-section of the first louver 13 and the second louver 14 is circular. Figure 4 As shown.

[0025] The working principle of the integrated system in the above embodiment is as follows: Under normal circumstances, the control system turns on the first fan 26 and / or the second fan 27, the first air passage 21 is open, the first bypass 28 is closed, and the second air passage 22 and / or the second bypass 29 is open. Dust, VOCs, acid mist, toxic and harmful air pollutants and irritating odor gases generated in the hazardous waste storage 4 enter the waste gas collection system through the first louver 13 and the second louver 14, and are introduced into the first air passage 21. After purification by the activated carbon adsorption box 25, they are sent to the exhaust stack 23 that meets the relevant specifications through the first fan 26 and / or the second fan 27, and then discharged from the exhaust stack 23. 3. The gas is discharged into the atmosphere at high altitude, thereby achieving the purpose of collecting and treating waste gas in the hazardous waste storage 4. In the event of an emergency, when a large amount of flammable, explosive, toxic and harmful gases are suddenly released from the materials in the hazardous waste storage 4, the control system will activate the first fan 26 and the second fan 27 and shut off the first gas passage 21. The gas will enter the waste gas collection system through the first louver 13 and the second louver 14, and be introduced into the first bypass 28. It will then be sent to the exhaust stack 23 through the first fan 26 and the second fan 27, and then discharged into the atmosphere at high altitude through the exhaust stack 23, thereby achieving the purpose of emergency ventilation of the hazardous waste storage 4 and the discharge of flammable, explosive and toxic and harmful gases in the dead corners of the hazardous waste storage 4.

Claims

1. An integrated system for collecting, treating, and ventilating hazardous waste storage exhaust gas, characterized in that: The system includes an exhaust gas collection system, an exhaust gas treatment system, and a control system. The exhaust gas collection system is located inside the hazardous waste storage facility. The system comprises multiple horizontal ducts and multiple vertical ducts connected as a single unit and fixed to the inner wall of the hazardous waste storage facility. The horizontal ducts are laid out horizontally along the inner wall or columns of the hazardous waste storage facility, forming a closed loop when connected end-to-end. Adjacent horizontal ducts converge at a corner. Each of the transverse ducts is provided with several first louvers. The multiple longitudinal ducts are arranged longitudinally at intervals along the multiple transverse ducts. The top of each longitudinal duct is connected to one of the transverse ducts. Each longitudinal duct is provided with several second louvers. The exhaust gas treatment system is located outside the hazardous waste storage area. The exhaust gas treatment system includes a first gas path, a second gas path, and an exhaust stack connected in series. The first gas path is connected to the circuit. An activated carbon adsorption box is provided on the first gas path. A first fan is provided on the second gas path. The first gas path is connected in parallel with a first bypass. The second gas path is connected in parallel with a second bypass. A second fan is provided on the second bypass gas path. The pipe on the outlet side of the first bypass and the pipe on the inlet side of the second bypass are merged into a common pipe. The common pipe is connected to the first gas path and the second gas path via a pipe tee. The on / off state and airflow of the first gas path, the second gas path, the first bypass, and the second bypass are controlled by the control system.

2. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 1, characterized in that, Each of the longitudinal ducts is equipped with a second louver at its bottom end.

3. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 1, characterized in that, Each of the longitudinal ducts is equipped with a second louver at its middle and bottom ends.

4. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 2 or 3, characterized in that, The size of the openings of the plurality of second hundredth louvers increases sequentially with the increase of their distance from the first fan.

5. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 3, characterized in that, The second louver opening at the middle of each longitudinal duct is installed at a height of 0.7 to 5 meters above the ground, and the second louver opening at the bottom of each longitudinal duct is installed at a height of 0.2 to 3 meters above the ground.

6. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 1, characterized in that, A fire damper and a pressure transmitter are installed on the pipeline connecting the waste gas collection system and the first gas path. A filter is installed on the pipeline located at the inlet side of the activated carbon adsorption box. Differential pressure gauges are installed on both the inlet and outlet sides of the filter, the first fan, and the second fan, respectively. A temperature transmitter is installed on the activated carbon adsorption box. Several air volume regulating valves and several flow meters are installed on the first gas path, the second gas path, the first bypass, and the second bypass, respectively. The fire damper, pressure transmitter, differential pressure gauge, temperature transmitter, several air volume regulating valves, and several flow meters are electrically connected to the control system.

7. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 1, characterized in that, The exhaust stack is equipped with a sampling platform and a sampling port.

8. The integrated system for hazardous waste storage exhaust gas collection, treatment, and emergency ventilation according to claim 1, characterized in that, The diameter of each of the horizontal and vertical ducts is 100-600mm. The installation height of each horizontal duct is 1.5-6m above the ground or the top of each horizontal duct is 0.5-4.5m above the top of the hazardous waste storage. The installation height of each vertical duct is 0.2-3m above the ground. The top of the exhaust stack is 15m or more above the ground level. The top of the exhaust stack is more than 3.5m above the top of any platform or building within a 10m range. Platforms or buildings should not be located within a 45° angle above the exhaust stack outlet at a distance of more than 10m horizontally.

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