Accurate monitoring device for emergency emission reduction of industrial waste gas
By designing an emergency emission reduction device for industrial waste gas that detects branching paths and emergency filtration and exhaust pipes, the problem of rapid detection and efficient treatment of waste gas in emergency situations in existing technologies has been solved. This enables precise monitoring of waste gas and automatic emergency response, ensuring the high efficiency and environmental friendliness of waste gas treatment.
Patent Information
- Application Number
- CN202422988313.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing industrial waste gas treatment equipment cannot quickly detect, respond promptly, and treat waste gas accurately during emergency emission reduction, which may result in incomplete filtration and excessive emissions.
An industrial waste gas emergency emission reduction precision monitoring device was designed, which includes detection of branching paths and emergency filtration exhaust pipes. It uses gas sensors and solenoid valves for real-time monitoring and automatic path switching, and combines pressurization chambers and filtration chambers for efficient treatment.
It enables rapid detection and timely response of exhaust gas, ensuring that exhaust gas can be efficiently filtered and discharged under abnormal conditions, avoiding environmental pollution, and improving treatment efficiency and system stability.
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Figure CN223597634U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to industrial waste gas treatment technical field especially, relates to a kind of industrial waste gas emergency emission reduction precision monitoring device. BACKGROUND
[0002] With the rapid development of industrialization, especially in the continuous expansion of chemical industry, metallurgy, energy and other industries, waste gas emission problem has become a serious environmental challenge. Waste gas contains a large amount of harmful substances, such as volatile organic compounds, sulfur dioxide, nitrogen oxides, dust, etc. These pollutants not only cause serious pollution to the environment, but also pose a potential threat to human health. Therefore, industrial waste gas treatment has become an important part of global environmental protection laws and regulations. Many countries and regions have implemented strict emission standards to reduce the negative impact of waste gas on air quality.
[0003] Although the existing industrial waste gas treatment equipment can play a certain role in conventional emission, it often has the disadvantage of being unable to respond efficiently in emergency emission reduction, high concentration of waste gas and complex pollutants. For example, traditional emergency emission reduction equipment usually cannot achieve rapid detection, timely response and accurate treatment, and existing pressurization, filtration and other treatment methods may not be complete in high concentration of waste gas and complex pollutants.
[0004] Therefore, it is necessary to invent an industrial waste gas emergency emission reduction precision monitoring device. UTILITY MODEL CONTENT
[0005] To solve the above technical problems, the utility model provides an industrial waste gas emergency emission reduction precision monitoring device to solve the problem that the existing industrial waste gas emergency emission reduction precision monitoring device cannot achieve rapid detection, timely response and accurate treatment, and incomplete filtration and emission exceeding standard. The industrial waste gas emergency emission reduction precision monitoring device comprises a waste gas passage pipe, a detection bifurcated path, a connecting elbow pipe, a small pressure reduction bin, a general smoke exhaust pipe, a large pressure reduction bin and an emergency gas filtration and smoke exhaust pipe. The detection bifurcated path is fixedly installed at the top of the waste gas passage pipe, and the connecting elbow pipe is fixedly installed at the two side outlets of the detection bifurcated path. The small pressure reduction bin is fixedly installed at the top of one group of connecting elbow pipes. The general smoke exhaust pipe is fixedly installed at the top of the small pressure reduction bin. The large pressure reduction bin is fixedly installed at the top of another group of connecting elbow pipes, and the emergency gas filtration and smoke exhaust pipe is fixedly installed at the top of the large pressure reduction bin.
[0006] The detection bifurcated path comprises a detection deceleration pipe, a bifurcated pipe, a general path electromagnetic valve and an emergency path electromagnetic valve. The detection deceleration pipe is fixedly installed at the top of the waste gas passage pipe, and the bifurcated pipe is fixedly installed at the movement of the detection deceleration pipe. The general path electromagnetic valve and the emergency path electromagnetic valve are respectively fixedly installed at the two outlets of the bifurcated pipe.
[0007] The emergency filter smoke exhaust pipe comprises a pressurizing bin, a pressurizing pipe, an emergency filter bin, a connecting pipe, an air exhaust pipe, a booster fan and an exhaust pipe, and the pressurizing bin is fixedly installed on the top of a large pressure reduction bin, and the pressurizing pipe is fixedly installed on the outer side of the pressurizing bin; the emergency filter bin is fixedly installed on the top of the pressurizing bin, and the air exhaust pipe is fixedly installed on the top of the emergency filter bin through the connecting pipe, and the exhaust pipe is fixedly installed on the top end of the air exhaust pipe; and the booster fan is fixedly installed on one end of the exhaust pipe.
[0008] The detection deceleration pipe inside the detection bifurcated path adopts a downwardly bent steel pipe, and gas sensors and temperature and humidity sensors are fixedly installed inside the detection deceleration pipe, and the bifurcated pipe extends outward at both ends of the detection deceleration pipe; the two ends of the bifurcated pipe extend upward through a connecting elbow; the ordinary path electromagnetic valve and the emergency path electromagnetic valve always keep one open and one closed, which has the following effects: ①deceleration and regulation of waste gas flow and flow rate: the detection deceleration pipe in the detection bifurcated path is used to slow down the flow rate of waste gas, so that the airflow is more stable, facilitating subsequent accurate monitoring, and by reducing the flow rate of waste gas, it is ensured that the sensors can fully collect the composition and concentration data of the gas, avoiding measurement errors caused by too fast airflow; ②real-time monitoring of waste gas concentration and composition: the detection deceleration pipe is provided with gas sensors and temperature and humidity sensors inside, which are used to monitor the concentration of pollutants such as CO2, NOx, SO2 and VOC in waste gas, as well as temperature and humidity parameters in real time, and these data will be transmitted to the monitoring system to evaluate whether the waste gas exceeds the standard and provide basis for subsequent emission reduction decisions, and by accurately monitoring the composition of waste gas, the specific type and pollution degree of waste gas can be identified to determine whether emergency emission reduction measures need to be started; ③intelligent shunting and path selection of waste gas: after passing through the detection deceleration pipe, the waste gas enters the bifurcated pipe, which guides the waste gas to two different paths, if the waste gas concentration is normal or slightly exceeds the standard, the waste gas will be discharged through the conventional ordinary smoke exhaust pipe, if the waste gas concentration reaches the set threshold or is abnormal, the system will automatically switch to the emergency filter smoke exhaust pipe for treatment through the emergency filter and exhaust device.
[0009] The pressurized bin in the emergency filter and smoke exhaust pipe is made of a metal pipe, and the pressurized bin can input clean air into the bin through the pressurizing pipe, and the emergency filter bin is internally provided with a gas filter cartridge; the air suction pipe is a vertical upward metal pipe, and the exhaust pipe is a pipe perpendicular to the air suction pipe, and the exhaust pipe can generate continuous airflow perpendicular to the air suction pipe through the booster fan; the pressurized bin forms a high pressure state by inputting air through the pressurizing pipe, and the air suction pipe forms a low pressure state through the high-speed airflow generated by the booster fan and the exhaust pipe, the lower part of the emergency filter bin is in a high pressure state, and the upper part is in a low pressure state, which has the following effects: ① emergency exhaust of waste gas: when the waste gas concentration exceeds the standard or abnormal pollutants are detected, the system will automatically switch to the emergency exhaust path, and at this time, the waste gas is treated through the emergency filter and smoke exhaust pipe; this process is to prevent the waste gas from being directly discharged into the atmosphere without treatment, thereby avoiding environmental pollution; ② waste gas pressurization and flow control: the pressurized bin is located at the top of the emergency filter and smoke exhaust pipe, and the main function is to input clean air into the bin through the pressurizing pipe to create a high pressure environment; the high pressure environment helps to push the waste gas through the filter system to ensure smooth flow and timely treatment of the waste gas; the high pressure airflow pushes the flow of waste gas, reduces the possibility of airflow stagnation in the system, and ensures that the waste gas can be effectively discharged and treated through the emergency exhaust path; ③ emergency filter treatment of waste gas: the gas filter cartridge is installed in the emergency filter bin to filter harmful substances in the waste gas and reduce the pollutant concentration in the waste gas; the filter bin removes toxic and harmful components in the waste gas through adsorption, decomposition or sedimentation to ensure that the discharged gas meets environmental protection standards; ④ form airflow pressure difference: the waste gas is guided to the exhaust pipe through the air suction pipe; this process forms a low pressure area, which forms a pressure difference with the high pressure state in the pressurized bin, and pushes the waste gas to flow outward; the exhaust pipe is supported by the booster fan to ensure smooth exhaust of the waste gas, and the exhaust efficiency is increased through the acceleration of the airflow.
[0010] Compared with the prior art, the utility model has the advantages of:
[0011] 1. The utility model discloses a detection bifurcation path setting has the following effect, ① exhaust gas flow and the deceleration and regulation and control of flow rate: the detection deceleration pipe in the detection bifurcation path is used for slowing down the flow rate of exhaust gas, makes the airflow more stable, convenient for the accurate monitoring of subsequent, by reducing the flow rate of exhaust gas, ensure that sensor can gather the composition and concentration data of gas fully, avoid the measurement error caused by airflow too fast, ② real -time monitoring of exhaust gas concentration and composition: detection deceleration pipe inside is equipped with gas sensor and temperature and humidity sensor, these sensors are used for real -time monitoring the pollutant concentration in exhaust gas, such as CO2, NOx, SO2, VOC etc. and temperature and humidity parameters, these data will be transmitted to monitoring system, is used to assess whether exhaust gas is overproof, and provides the basis for the subsequent emission reduction decision, through accurate monitoring exhaust gas composition, can identify the specific type and pollution degree of exhaust gas, judge whether need to start the emergency emission reduction measure, ③ exhaust gas's intelligent shunt and path selection: exhaust gas after passing through detection deceleration pipe, will enter bifurcated pipe, this pipe guides exhaust gas to two different paths, if exhaust gas concentration is normal or slightly overproof, exhaust gas will be discharged through the conventional ordinary flue, if exhaust gas concentration reaches the set threshold value or abnormal, the system will automatically switch to emergency filter gas flue, is handled through emergency filtration and exhaust device.
[0012] 2. The utility model discloses the setting of emergency filter gas flue has the following effect, ① emergency exhaust gas:
[0013] When exhaust gas concentration is overproof or detects the abnormality of pollutant, the system will automatically switch to the emergency discharge path, at this time, exhaust gas is handled through the emergency filter gas flue. This process is to prevent exhaust gas from being discharged directly into the atmosphere without treatment, thereby avoiding pollution of the environment; ② exhaust gas pressurization and flow control: the pressurization bin is located at the top of the emergency filter gas flue, and the main function is to input clean air to the inside through the pressurization pipe to create a high-pressure environment. This high-pressure environment helps to push exhaust gas through the filtration system, ensuring smooth flow and timely treatment of exhaust gas. The high-pressure airflow pushes the flow of exhaust gas, reducing the possibility of airflow stagnation in the system, ensuring that exhaust gas can be effectively discharged and processed through the emergency discharge path; ③ exhaust gas emergency filtration treatment: the gas filter cartridge is installed in the emergency filter bin for filtering harmful substances in exhaust gas to reduce the pollutant concentration in exhaust gas. The filter bin removes toxic and harmful components in exhaust gas through adsorption, decomposition, or sedimentation, ensuring that the discharged gas meets environmental standards; ④ forming an airflow pressure difference: through the air extraction pipeline, exhaust gas is guided to the exhaust pipeline. This process forms a low-pressure area, which forms a pressure difference with the high-pressure state in the pressurization bin, pushing exhaust gas to flow outward. The exhaust pipeline is supported by a booster fan, ensuring smooth exhaust of exhaust gas. At the same time, through the acceleration of airflow, the discharge efficiency is increased. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1It is the structure schematic diagram of the utility model.
[0015] Figure 2 It is the structure schematic diagram of the utility model detection bifurcation path.
[0016] Figure 3 It is the structure schematic diagram of the utility model emergency filter gas smoke pipe.
[0017] In the drawing,
[0018] Waste gas pipe 1, detection bifurcation path 2, detection deceleration pipe 21, bifurcation pipe 22, ordinary path electromagnetic valve 23, emergency path electromagnetic valve 24, connecting elbow 3, small pressure reduction bin 4, ordinary smoke pipe 5, large pressure reduction bin 6, emergency filter gas smoke pipe 7, pressurizing bin 71, pressurizing pipe 72, emergency filter bin 73, connecting pipe 74, air extraction pipe 75, booster fan 76, exhaust pipe 77. Specific implementation
[0019] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor should belong to the protection scope of the utility model.
[0020] As shown in the accompanying Figure 1 To the accompanying Figure 3 As shown.
[0021] The utility model provides a kind of industrial waste gas emergency emission reduction precision monitoring device, including waste gas pipe 1, detection bifurcation path 2, connecting elbow 3, small pressure reduction bin 4, ordinary smoke pipe 5, large pressure reduction bin 6 and emergency filter gas smoke pipe 7, wherein: detection bifurcation path 2 is fixedly installed at the top of waste gas pipe 1, and connecting elbow 3 is fixedly installed at the two side outlets of detection bifurcation path 2, and the small pressure reduction bin 4 is fixedly installed at the top of a group of connecting elbow 3;The ordinary smoke pipe 5 is fixedly installed at the top of small pressure reduction bin 4;The large pressure reduction bin 6 is fixedly installed at the top of another group of connecting elbow 3, and the emergency filter gas smoke pipe 7 is fixedly installed at the top of large pressure reduction bin 6.
[0022] Detection bifurcation path 2 includes detection deceleration pipe 21, bifurcation pipe 22, ordinary path electromagnetic valve 23 and emergency path electromagnetic valve 24, and detection deceleration pipe 21 is fixedly installed at the top of waste gas pipe 1, and the bifurcation pipe 22 is fixedly installed at the movement of detection deceleration pipe 21;The ordinary path electromagnetic valve 23 and emergency path electromagnetic valve 24 are respectively fixedly installed at the two outlets of bifurcation pipe 22.
[0023] The emergency filter and smoke exhaust pipe 7 comprises a pressurized bin 71, a pressurized pipe 72, an emergency filter bin 73, a connecting pipe 74, an air exhaust pipe 75, a booster fan 76 and an exhaust pipe 77, the pressurized bin 71 is fixedly installed on the top of the large pressure relief bin 6, and the pressurized pipe 72 is fixedly installed on the outer side of the pressurized bin 71; the emergency filter bin 73 is fixedly installed on the top of the pressurized bin 71, and the air exhaust pipe 75 is fixedly installed on the top of the emergency filter bin 73 through the connecting pipe 74, and the exhaust pipe 77 is fixedly installed on the top end of the air exhaust pipe 75; the booster fan 76 is fixedly installed on one end of the exhaust pipe 77.
[0024] The detection deceleration pipe 21 inside the detection bifurcated path 2 adopts a downwardly bent steel pipe, and gas sensors and temperature and humidity sensors are fixedly installed inside the detection deceleration pipe 21, and the bifurcated pipe 22 extends outward at both ends of the detection deceleration pipe 21; the two ends of the bifurcated pipe 22 extend upward through the connecting elbow 3; the ordinary path electromagnetic valve 23 and the emergency path electromagnetic valve 24 always keep one open and one closed.
[0025] The pressurized bin 71 inside the emergency filter and smoke exhaust pipe 7 adopts a section of metal pipe, and the pressurized bin 71 can input clean air inward through the pressurized pipe 72, and the emergency filter bin 73 is internally provided with a gas filter element; the air exhaust pipe 75 adopts a vertical upward metal pipe, and the exhaust pipe 77 adopts a pipe perpendicular to the air exhaust pipe 75, the exhaust pipe 77 can generate continuous airflow perpendicular to the air exhaust pipe 75 through the booster fan 76; the pressurized bin 71 forms a high-pressure state by inputting air through the pressurized pipe 72, and the air exhaust pipe 75 forms a low-pressure state by the high-speed airflow generated by the booster fan 76 and the exhaust pipe 77, and the lower part of the emergency filter bin 73 is in a high-pressure state, and the upper part is in a low-pressure state.
[0026] Compared with the prior art, the industrial waste gas emergency emission reduction precision monitoring device has the following obvious advantages:
[0027] 1. Precise monitoring and automatic emergency response
[0028] Prior art: Many waste gas emission systems mainly rely on manual operation or simplified alarm systems, which cannot monitor the change of waste gas concentration in real time, and the response is slow, and cannot effectively handle the emergency in the first time.
[0029] Advantages of the device: The device integrates the detection bifurcated path 2 and the gas sensor 21, can monitor the concentration and other parameters of the waste gas in real time, automatically judge whether it is over standard, and once the concentration of the waste gas is detected to be abnormal, the device will quickly switch to the emergency path and start the emergency filter and smoke exhaust pipe 7 for emergency treatment, to ensure rapid and accurate response.
[0030] 2. Efficient waste gas pressurization and flow control
[0031] Existing technology: Traditional waste gas treatment systems may not have sufficient pressure control, leading to poor flow of waste gas in the pipeline or delayed emission.
[0032] Advantages of the device: Through the design of the pressurizing bin 71 and the pressurizing pipe 72, the device can form a high-pressure environment in the emergency filter and exhaust pipe 7, promoting the flow of waste gas and avoiding its stagnation, ensuring that the waste gas passes through the filter system quickly and smoothly and is discharged.
[0033] 3. Efficient filtration and pollutant removal
[0034] Existing technology: Many traditional waste gas treatment systems have low filtration efficiency and cannot effectively remove all harmful substances in waste gas, or rely only on simple physical filtration, lacking the ability to deal with complex pollutants.
[0035] Advantages of the device: The device is equipped with an emergency filter bin 73 and high-efficiency gas filter cartridges, which can effectively filter toxic and harmful substances in waste gas and reduce the concentration of pollutants in emissions. Even in the case of abnormal waste gas concentration, the emergency filtration system can still provide efficient waste gas purification, ensuring that emissions meet environmental protection requirements.
[0036] 4. Fully automated treatment system
[0037] Existing technology: In existing technology, waste gas treatment often relies on manual intervention and cannot respond immediately in emergency situations. Many systems cannot detect waste gas in real time and automatically switch processing paths.
[0038] Advantages of the device: The device has fully automated functions. When abnormal waste gas concentration is detected, the device automatically starts the emergency treatment mechanism, switches to the emergency filter and exhaust pipe 7 for waste gas pressurization, filtration, and discharge without human intervention, greatly improving response speed and processing efficiency.
[0039] 5. Emergency response function and waste gas accumulation prevention
[0040] Existing technology: Many systems cannot effectively respond to sudden abnormal waste gas emissions, leading to delayed waste gas discharge or accumulation in the pipeline, posing a pollution risk to the environment.
[0041] Advantages of the device: Through the design of the air suction pipe 75 and the exhaust pipe 77, the device can quickly discharge waste gas through the system and avoid its accumulation in the system. The pressurizing bin 71 and the booster fan 76 ensure that waste gas can continue to flow, thereby avoiding device overload or failure due to waste gas stagnation.
[0042] 6. Reduce equipment damage and improve system stability
[0043] Prior art: In the case of excessive exhaust gas or insufficient treatment capacity, the existing exhaust gas treatment system may be damaged due to excessive pressure or heavy load, affecting the stability of the system.
[0044] Advantages of the device: The reasonable design of the shunt path detection, the bifurcation path 2, the pressurizing bin 71 and the emergency filter gas exhaust pipe 7 can effectively reduce the system burden, prevent equipment overload and ensure long-term stable operation.
[0045] 7. Multi-path emission reduction and flexible response
[0046] Prior art: Traditional equipment usually relies on a single path for exhaust gas emission. Once a problem occurs, it may lead to insufficient treatment capacity or inability to handle different types of exhaust gas.
[0047] Advantages of the device: The device supports two independent exhaust gas discharge paths through the switching of the ordinary path electromagnetic valve 23 and the emergency path electromagnetic valve 24, which can flexibly respond to different exhaust gas treatment needs. The efficient treatment system of the emergency filter gas exhaust pipe 7 ensures that the exhaust gas discharge system can operate efficiently even in emergency situations.
[0048] Summary:
[0049] Compared with the prior art, the device can quickly respond and effectively handle abnormal exhaust gas concentration through precise monitoring, automatic emergency response, efficient exhaust gas pressurization and flow control, full automation operation and emergency filter gas exhaust pipe 7. It not only improves the efficiency and environmental protection of exhaust gas treatment, but also ensures the stability of the system and the long-term reliable operation of the equipment, solving the problems of slow exhaust gas treatment, low filtration efficiency and equipment damage in traditional technology.
[0050] The technical solutions described in the utility model or inspired by the technical solutions of the utility model by those skilled in the art can design similar technical solutions to achieve the above technical effects, which fall within the protection scope of the utility model.
Claims
1. Industrial waste gas emergency emission reduction precise monitoring device, characterized in that: The utility model provides waste gas passes through the pipe (1), detects the bifurcated path (2), connects the elbow pipe (3), small -size pressure reducing storehouse (4), common exhaust pipe (5), large -size pressure reducing storehouse (6) and emergency filter gas exhaust pipe (7), wherein: the bifurcated path (2) fixed mounting is at the top of waste gas passes through the pipe (1), and the elbow pipe (3) fixed mounting is at the both sides export of bifurcated path (2), and this small -size pressure reducing storehouse (4) fixed mounting is at the top of a group of elbow pipe (3), the common exhaust pipe (5) fixed mounting is at the top of small -size pressure reducing storehouse (4), the large -size pressure reducing storehouse (6) fixed mounting is at the top of another group of elbow pipe (3), and emergency filter gas exhaust pipe (7) fixed mounting is at the top of large -size pressure reducing storehouse (6).
2. The industrial waste gas emergency emission reduction precision monitoring device according to claim 1, characterized in that: The bifurcated path (2) includes a detection deceleration pipe (21), a bifurcated pipe (22), a common path electromagnetic valve (23), and an emergency path electromagnetic valve (24), and the detection deceleration pipe (21) is fixedly installed at the top of the waste gas passing pipe (1), the bifurcated pipe (22) is fixedly installed at the movement of the detection deceleration pipe (21); the common path electromagnetic valve (23) and the emergency path electromagnetic valve (24) are respectively fixedly installed at the two outlets of the bifurcated pipe (22).
3. The industrial waste gas emergency emission reduction precision monitoring device according to claim 1, characterized in that: The emergency filter gas exhaust pipe (7) includes a pressurizing chamber (71), a pressurizing pipe (72), an emergency filter chamber (73), a connecting pipe (74), an air suction pipe (75), a booster fan (76), and an exhaust pipe (77), and the pressurizing chamber (71) is fixedly installed at the top of the large-size pressure reducing storehouse (6), the pressurizing pipe (72) is fixedly installed outside the pressurizing chamber (71); the emergency filter chamber (73) is fixedly installed at the top of the pressurizing chamber (71), and the air suction pipe (75) is fixedly installed at the top of the emergency filter chamber (73) through the connecting pipe (74), the exhaust pipe (77) is fixedly installed at the top end of the air suction pipe (75); the booster fan (76) is fixedly installed at one end of the exhaust pipe (77).
4. The industrial waste gas emergency emission reduction precision monitoring device according to claim 2, characterized in that: The detection deceleration pipe (21) inside the bifurcated path (2) is a downwardly bent steel pipe, and the detection deceleration pipe (21) is fixedly installed with a gas sensor and a temperature and humidity sensor inside, the bifurcated pipe (22) extends outward at both ends of the detection deceleration pipe (21); the bifurcated pipe (22) extends upward through the elbow pipe (3) at both ends; the common path electromagnetic valve (23) and the emergency path electromagnetic valve (24) always maintain an open and closed state.
5. The industrial waste gas emergency emission reduction precision monitoring device according to claim 3, characterized in that: The pressurized cabin (71) inside the emergency filter and smoke exhaust pipe (7) adopts a metal pipe, and the pressurized cabin (71) can input clean air inwards through the pressurized pipe (72), and the inside of the emergency filter cabin (73) is provided with a gas filter core; the air exhaust pipe (75) adopts a metal pipe vertically upwards, and the exhaust pipe (77) adopts a pipe vertically to the air exhaust pipe (75), and the exhaust pipe (77) can generate continuous airflow vertically to the air exhaust pipe (75) through the booster fan (76); the pressurized cabin (71) forms a high pressure state by inputting air through the pressurized pipe (72), and the air exhaust pipe (75) forms a low pressure state by the high speed airflow generated by the booster fan (76) and the exhaust pipe (77), and the lower part of the emergency filter cabin (73) is in a high pressure state, and the upper part is in a low pressure state.