Gas pressure protection device, ventilation and deodorization system and deep drainage tunnel

Abstract

The present invention discloses a gas pressure protection device, a ventilation and deodorization system, and a deep drainage tunnel. The gas pressure protection device includes a liquid sealing chamber, the liquid sealing chamber includes a liquid sealing area and a gas washing and pressure relief area, the liquid sealing area includes a first gas part and a first liquid part arranged up and down, the gas washing and pressure relief area includes a second gas part and a second liquid part arranged up and down, the first liquid part and the second liquid part are used to accommodate a liquid sealing medium; wherein, the first liquid part is connected to the second liquid part, the first gas part is connected to the air outlet channel of the ventilation and deodorization system, and the second gas part is connected to the outside atmosphere. The gas pressure protection device can ensure that the gas pressure in the air outlet channel is within a safe pressure range, and at the same time plays a water washing role, reducing the odor concentration of the dissipated gas.

Description

Technical Field

[0001] The invention relates to the field of ventilation and deodorization of deep drainage and storage tunnels, and in particular to a gas pressure protection device, a ventilation and deodorization system and a deep drainage tunnel. Background Art

[0002] Large deep drainage storage tunnels have become a successful model and development trend for urban waterlogging control, initial rainwater pollution control, and combined sewage overflow control. With the improvement of living standards, the public has put forward higher requirements for odor control of drainage facilities. For large deep drainage storage tunnels, since the water intake contains a large amount of rainwater, the flow rate is much greater than that of general sewage treatment plants and pumping stations, which can reach 50m 3 / s or more, and there are large fluctuations. During the water inflow process, the gas in the tunnel is squeezed out, and the gas emission changes with the water inflow. At the same time, the regulating tunnel is usually equipped with several water inflow shafts. The tunnel has a certain slope, and there are various water inflow conditions in the upstream and downstream water inflow shafts, which have a large impact on the gas emission in the tunnel. The pressure of the discharged gas in the tunnel fluctuates greatly, which will damage and affect the deodorization system. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the pressure fluctuation of the exhaust gas in the tunnel easily damages the deodorization system, and to provide a gas pressure protection device, a ventilation and deodorization system and a deep drainage tunnel.

[0004] A gas pressure protection device, used in a ventilation and deodorization system of a deep drainage tunnel, the gas pressure protection device comprising a liquid sealing chamber, the liquid sealing chamber comprising a liquid sealing area and a gas washing and pressure relief area, the liquid sealing area comprising a first gas portion and a first liquid portion arranged vertically, the gas washing and pressure relief area comprising a second gas portion and a second liquid portion arranged vertically, the first liquid portion and the second liquid portion being used to accommodate a liquid sealing medium;

[0005] Wherein, the first liquid part is communicated with the second liquid part, the first gas part is communicated with the air outlet channel of the ventilation and deodorization system, and the second gas part is communicated with the external atmosphere.

[0006] In this solution, as the gas pressure in the air outlet channel increases, the liquid sealing medium in the first liquid part and the second liquid part will form a liquid level difference. Once the pressure is too high, that is, the gas pressure in the air outlet channel exceeds the pressure allowed by the ventilation and deodorization system of the deep drainage tunnel, the water seal layer in the liquid seal chamber is squeezed and destroyed, and the gas enters the first gas part, the first liquid part, the second liquid part, and the second gas part in turn, and overflows to the outside atmosphere. Once the pressure in the air outlet channel returns to normal, a liquid seal layer will be formed again, thereby ensuring that the gas pressure in the air outlet channel is within a safe pressure range. In addition, while achieving gas pressure protection, the gas in this solution can contact the liquid sealing medium in the liquid seal chamber during the overflow process, play a water washing role, and reduce the odor concentration of the dissipated gas.

[0007] Preferably, the liquid sealing chamber comprises a first partition plate, and the first partition plate is connected to the inner wall surface of the liquid sealing chamber to separate the liquid sealing chamber into the liquid sealing area and the gas washing pressure relief area which are adjacently arranged.

[0008] Preferably, a hole is provided at the bottom of the first partition plate to enable the first liquid part to communicate with the second liquid part.

[0009] In this solution, by providing a hole channel, the gas in the liquid seal area can enter the gas washing and pressure relief area through the hole channel.

[0010] Preferably, the pressure difference between the liquid sealing medium of the first liquid part and the liquid sealing medium of the second liquid part is smaller than the preset safety air pressure of the deodorizing device in the ventilation and deodorizing system.

[0011] In this solution, the above arrangement allows the water seal layer in the liquid seal chamber to be squeezed and destroyed when the air pressure exceeds the allowable air pressure of the deodorizing device, so that the gas overflows to the outside through the hole at the bottom of the first partition.

[0012] Preferably, the gas washing and pressure relief zone has multiple guide plates, one end of the guide plate is connected to a side wall of the gas washing and pressure relief zone, and the other end extends obliquely upward to form a gap with the other side wall of the gas washing and pressure relief zone, and the gaps of two adjacent guide plates are staggered to form an "S"-shaped gas channel in the second liquid portion.

[0013] In this solution, by providing a guide plate extending obliquely upward, the gas is guided to flow along an "S"-shaped gas channel, thereby extending the flow path of the gas in the liquid seal chamber, increasing the residence time of the gas in the liquid seal medium, so that the gas overflow process is fully in contact with the liquid in the liquid seal chamber, thereby enhancing the water washing effect.

[0014] Preferably, the liquid seal chamber further includes a water replenishment area, and the water replenishment area includes a third gas part and a third liquid part arranged up and down, and the third gas part and the third liquid part are respectively connected to the second gas part and the second liquid part.

[0015] In this solution, the water replenishment area is used to replenish the water due to daily evaporation and the water carried away by the overflowing gas. By adding liquid sealing medium to the water replenishment area, liquid replenishment of the liquid sealing area and the gas washing and pressure relief area is achieved.

[0016] Preferably, the liquid seal chamber further comprises a second partition, and the gas scrubbing pressure relief area and the water replenishment area are separated by the second partition.

[0017] Preferably, the gas pressure protection device further comprises a water inlet device, the water replenishment area is provided with a float switch, and the float switch is connected to the water inlet device;

[0018] The float switch is used to control the water inlet device to replenish the liquid sealing medium to the water replenishment area when the liquid level of the second liquid part or the third liquid part is less than a preset threshold value.

[0019] In this solution, the float switch controls the opening and closing of the water inlet device to achieve real-time water replenishment.

[0020] Preferably, the liquid seal chamber further comprises a venting area, the venting area is connected to the water replenishing area, a water pump is arranged in the venting area, and the water pump is used to discharge the liquid sealing medium in the first liquid part, the second liquid part and the third liquid part. In this scheme, the water pump in the venting area can regularly empty the water in the liquid seal chamber, and after the water is emptied, the water inlet device can be used to replenish water to achieve the replacement of the water, thereby ensuring that the water quality of the water is good and the water washing function is normally played when the gas escapes and the pressure is released.

[0021] Preferably, the gas pressure protection device further comprises a drainage device, and the water pump is connected to the drainage device.

[0022] In this solution, the liquid sealing medium is discharged from the liquid sealing chamber through the drainage device.

[0023] Preferably, the gas pressure protection device further comprises a bypass channel, one end of the bypass channel is connected to the first gas portion, and the other end of the bypass channel is connected to the air outlet channel.

[0024] In this solution, the gas pressure protection device is connected to the air outlet channel through a bypass channel.

[0025] Preferably, a bottom end of the bypass channel is higher than a liquid level of the first liquid portion.

[0026] In this solution, the above-mentioned structural arrangement is adopted to prevent the liquid sealing medium from entering the bypass channel, thereby improving the safety of the gas pressure protection device when in use.

[0027] Preferably, the gas pressure protection device further comprises an exhaust port, and two ends of the exhaust port are respectively connected to the second gas portion and the outside atmosphere.

[0028] In this solution, the second gas portion is connected to the exhaust port, so that the gas is discharged to the outside atmosphere through the exhaust port.

[0029] Preferably, the air outlet has a third partition plate, and the third partition plate extends upward from the bottom surface of the air outlet.

[0030] In this solution, the third partition is provided to prevent the liquid in the liquid seal chamber from entering the exhaust port due to the increase in liquid level, thereby ensuring basic gas-liquid separation.

[0031] A ventilation and deodorization system comprises an air outlet passage and a deodorization device which are interconnected. The ventilation and deodorization system also comprises the above-mentioned gas pressure protection device. The first gas portion is connected to the air outlet passage.

[0032] In this solution, the ventilation and deodorization system using the above-mentioned pressure protection device has the advantages of small gas pressure fluctuation and good stability.

[0033] A deep drainage tunnel comprises a tunnel body. The deep drainage tunnel also comprises the above-mentioned ventilation and deodorization system. The air outlet channel is connected to the tunnel body.

[0034] In this solution, the deep drainage tunnel using the above-mentioned ventilation and deodorization system has the advantages of small gas pressure fluctuation and good stability.

[0035] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0036] The positive and progressive effects of the present invention are:

[0037] For the gas pressure protection device, when the gas pressure in the air outlet channel exceeds the pressure allowed by the ventilation and deodorization system of the deep drainage tunnel, the liquid seal layer in the liquid seal chamber is squeezed and destroyed, and the gas enters the first gas part, the first liquid part, the second liquid part, and the second gas part in turn, and overflows to the outside atmosphere. Once the pressure in the air outlet channel returns to normal, a liquid seal layer will be formed again, thereby ensuring that the gas pressure in the air outlet channel is within a safe pressure range; while achieving gas pressure protection, the gas can contact the liquid seal medium in the liquid seal chamber during the overflow process, play a water washing role, and reduce the odor concentration of the dissipated gas; it adapts to the characteristics of large deep drainage tunnels with large air volume and large fluctuations; it can adopt reinforced concrete structure, simple structure, and flexible implementation. Accordingly, for the ventilation and deodorization system and deep drainage tunnel containing the gas pressure protection device, it has the advantages of small gas pressure fluctuation and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the cross-sectional structure of a gas pressure protection device according to a preferred embodiment of the present invention.

[0039] Figure 2 Schematic diagram of a gas pressure protection device according to a preferred embodiment of the present invention.

[0040] Description of Reference Numerals

[0041] Gas pressure protection device 100

[0042] Liquid seal chamber 1

[0043] Bypass channel 2

[0044] Exhaust 3

[0045] Liquid seal area 11

[0046] Gas washing and pressure relief area 12

[0047] Water replenishment area 13

[0048] Emptying area 14

[0049] First partition 15

[0050] First channel 151

[0051] Second partition 16

[0052] Second channel 161

[0053] The third partition 17

[0054] The first gas unit 111

[0055] First liquid part 112

[0056] The second gas unit 121

[0057] Second liquid part 122

[0058] The third gas unit 131

[0059] The third liquid part 132

[0060] Deflector 123

[0061] Float switch 133

[0062] Water pump 141

[0063] Air outlet 200

[0064] Deodorizing device 300 DETAILED DESCRIPTION

[0065] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0066] This embodiment discloses a gas pressure protection device 100, which is used in a ventilation and deodorization system of a deep drainage tunnel. Figure 1-2 As shown, the gas pressure protection device 100 includes a liquid sealing chamber 1, the liquid sealing chamber 1 includes a liquid sealing area 11 and a gas washing and pressure relief area 12, the liquid sealing area 11 includes a first gas part 111 and a first liquid part 112 arranged in upper and lower parts, the gas washing and pressure relief area 12 includes a second gas part 121 and a second liquid part 122 arranged in upper and lower parts, the first liquid part 112 and the second liquid part 122 are used to accommodate the liquid sealing medium; wherein, the first liquid part 112 is connected to the second liquid part 122, the first gas part 111 is connected to the air outlet channel 200 of the ventilation and deodorization system, and the second gas part 121 is connected to the outside atmosphere.

[0067] In this embodiment, as the gas pressure in the air outlet channel 200 increases, the liquid sealing medium in the first liquid part 112 and the second liquid part 122 will form a liquid level difference, and once the pressure is too high, that is, the gas pressure in the air outlet channel 200 exceeds the pressure allowed by the ventilation and deodorization system of the deep drainage tunnel, the liquid sealing layer in the liquid sealing chamber 1 is squeezed and destroyed, and the gas enters the first gas part 111, the first liquid part 112, the second liquid part 122, and the second gas part 121 in sequence, and overflows to the outside atmosphere, and once the pressure in the air outlet channel 200 returns to normal, a liquid sealing layer will be formed again, thereby ensuring that the gas pressure in the air outlet channel 200 is within a safe pressure range. In addition, while realizing gas pressure protection, the gas in this embodiment can contact the liquid sealing medium in the liquid sealing chamber 1 during the overflow process, play a water washing role, and reduce the odor concentration of the dissipated gas.

[0068] It should be noted that, in the present embodiment, the liquid sealing medium is specifically water, and in other alternative embodiments, the liquid sealing medium may also be other liquids.

[0069] The liquid seal chamber 1 includes a first partition 15, which is connected to the inner wall surface of the liquid seal chamber 1 to separate the liquid seal chamber 1 into a liquid seal area 11 and a gas washing and pressure relief area 12 which are adjacent to each other. Specifically, the first partition 15 is connected to the top wall and the side wall of the liquid seal area 11, and a first channel 151 is formed between the bottom of the first partition 15 and the bottom wall of the liquid seal area 11 to communicate the first liquid part 112 with the second liquid part 122. The first channel 151 is provided so that the gas in the liquid seal area 11 enters the gas washing and pressure relief area 12 through the first channel 151.

[0070] The pressure difference between the liquid sealing medium of the first liquid part 112 and the liquid sealing medium of the second liquid part 122 is less than the preset air pressure of the deodorizing device 300 in the ventilation and deodorizing system. The above arrangement makes it possible for the water seal layer in the liquid sealing chamber to be squeezed and destroyed after the air pressure exceeds the allowable air pressure of the deodorizing device, so that the gas overflows to the outside through the hole at the bottom of the first partition. It should be noted that the preset air pressure of the deodorizing device can be the maximum air pressure that the deodorizing device can withstand under different working conditions.

[0071] The scrubbing pressure relief zone 12 has a plurality of guide plates 123, one end of which is connected to a side wall of the scrubbing pressure relief zone 12, and the other end extends obliquely upward to form a gap with the other side wall of the scrubbing pressure relief zone 12, and the gaps of two adjacent guide plates 123 are arranged in a staggered manner to form an "S"-shaped gas channel in the second liquid portion 122. Among them, by providing the guide plate 123 extending obliquely upward, the gas is guided to flow along the "S"-shaped gas channel, the flow path of the gas in the liquid seal chamber 1 is extended, and the residence time of the gas in the liquid seal medium is increased, so that the gas overflow process is fully in contact with the liquid in the liquid seal chamber 1, and the water washing effect is enhanced.

[0072] In other alternative embodiments, the guide plate 123 may also be in other forms as long as it can achieve gas diversion and extend the gas flow path.

[0073] The liquid sealing chamber 1 further includes a water replenishment area 13, which includes a third gas portion 131 and a third liquid portion 132 arranged above and below, and the third gas portion 131 and the third liquid portion 132 are respectively connected to the second gas portion 121 and the second liquid portion 122. The water replenishment area 13 is used to replenish the water evaporated daily and the water carried away by the overflowing gas, and the liquid sealing area 11 and the gas washing pressure relief area 12 are replenished by replenishing the liquid sealing medium to the water replenishment area 13.

[0074] The liquid sealing chamber 1 also includes a second partition 16, and the gas washing pressure relief zone 12 and the water replenishment zone 13 are separated by the second partition 16. Specifically, the second partition 16 is connected to the side wall of the gas washing pressure relief zone 12, and a second channel 161 is formed between the second partition 16 and the bottom wall of the gas washing pressure relief zone 12. The liquid sealing zone 11, the gas washing pressure relief zone 12 and the water replenishment zone 13 are interconnected through the first channel 151 and the second channel 161. The liquid sealing medium in the water replenishment zone enters the gas washing pressure relief zone 12 through the second channel 161 to achieve liquid replenishment. There is a space between the second partition 16 and the top wall of the gas washing pressure relief zone 12 so that the liquid levels of the gas washing pressure relief zone 12 and the water replenishment zone 13 are the same.

[0075] The gas pressure protection device 100 further includes a water inlet device, and the water replenishment area 13 is provided with a float switch 133, and the float switch 133 is connected to the water inlet device; the float switch 133 is used to control the water inlet device to replenish the liquid sealing medium to the water replenishment area 13 when the liquid level of the third liquid part 132 is less than a preset threshold. The float switch 133 controls the opening and closing of the water inlet device to achieve real-time water replenishment. Specifically, the water inlet device can be an external water supply pipe.

[0076] During specific use, since the liquid levels in the gas washing pressure relief area 12 and the water replenishment area 13 are the same, the float switch 133 can be set on the liquid surface of the third liquid part 132, and the liquid level of the third liquid part 132 is detected. When the liquid level is detected to be lower than a preset threshold, the float switch 133 opens, and the water supply pipe replenishes water to the water replenishment area 13 until it is detected that the liquid level is not lower than the threshold. The float switch 133 is closed, and the water supply pipe stops taking in water.

[0077] The liquid seal chamber 1 also includes a venting area 14, which is arranged at the side of the water replenishing area 13, and the venting area is connected to the water replenishing area 13. A water pump 141 is arranged in the venting area, and the water pump 141 is connected to a drainage device (for example, a water outlet pipe), and the liquid sealing medium is discharged from the liquid seal chamber 1 through the drainage device. The water pump 141 can regularly drain the water in the liquid seal chamber 1. After the water is drained, the water can be replenished by using a water inlet device (for example, an external water supply pipe) to achieve the replacement of the water, thereby ensuring that the water quality of the water is good and the water washing function is normally played when the gas escapes and the pressure is released.

[0078] The gas pressure protection device 100 also includes a bypass channel 2, one end of which is connected to the first gas portion 111, and the other end of which is connected to the air outlet channel 200. The gas pressure protection device 100 is connected to the air outlet channel 200 through the bypass channel 2. The bottom end of the bypass channel 2 is higher than the liquid level of the first liquid portion 112, or the bottom end of the bypass channel 2 is flush with the liquid level in the first liquid portion 112. The above-mentioned structural arrangement prevents the liquid sealing medium from entering the bypass channel 2, thereby improving the safety of the gas pressure protection device 100 when in use.

[0079] It should be noted that, in other alternative embodiments, a fourth partition plate may also be provided in the bypass channel 2 , and the fourth partition plate extends upward from the bottom surface of the bypass channel 2 to prevent the liquid sealing medium from entering the bypass channel 2 .

[0080] The gas pressure protection device 100 also includes an exhaust port 3, and the two ends of the exhaust port 3 are respectively connected to the second gas portion 121 and the outside atmosphere. The second gas portion 121 is connected to the exhaust port 3 to achieve instant exhaust. The exhaust port 3 has a third partition 17, and the third partition 17 extends upward from the bottom surface of the exhaust port 3. The third partition 17 is provided to prevent the liquid in the liquid seal chamber 1 from entering the exhaust port 3 due to the increase in the liquid level, thereby ensuring basic gas-liquid separation.

[0081] This embodiment also discloses a ventilation and deodorization system, including an air outlet channel 200 and a deodorization device 300 that are interconnected. The ventilation and deodorization system also includes the above-mentioned gas pressure protection device 100 , and the first gas portion 111 is connected to the air outlet channel 200 .

[0082] In this embodiment, the ventilation and deodorization system using the gas pressure protection device 100 has the advantages of small gas pressure fluctuation and good stability.

[0083] This embodiment also discloses a deep drainage tunnel, including a tunnel body. The deep drainage tunnel also includes the above-mentioned ventilation and deodorization system, and the air outlet channel 200 is connected to the tunnel body.

[0084] In this embodiment, the deep drainage tunnel using the above-mentioned ventilation and deodorization system has the advantages of small gas pressure fluctuation and good stability.

[0085] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A gas pressure protection device, used in a ventilation and deodorization system of a deep drainage tunnel, the ventilation and deodorization system comprising an air outlet channel and a deodorization device interconnected with each other, characterized in that: The gas pressure protection device comprises a liquid sealing chamber, the liquid sealing chamber comprises a liquid sealing area and a gas washing and pressure relief area, the liquid sealing area comprises a first gas portion and a first liquid portion arranged vertically, the gas washing and pressure relief area comprises a second gas portion and a second liquid portion arranged vertically, the first liquid portion and the second liquid portion are used to accommodate a liquid sealing medium; wherein the first liquid portion is in communication with the second liquid portion, the first gas portion is in communication with the air outlet channel of the ventilation and deodorization system, and the second gas portion is in communication with the outside atmosphere, The gas pressure protection device is connected to the air outlet channel through a bypass channel, one end of the bypass channel is connected to the first gas portion, and the other end of the bypass channel is connected to the air outlet channel. The liquid sealing medium forms a liquid sealing layer, and the liquid sealing medium in the first liquid part and the second liquid part can form a liquid level difference; the pressure difference between the liquid sealing medium in the first liquid part and the liquid sealing medium in the second liquid part is less than the preset air pressure of the deodorizing device in the ventilation and deodorizing system; wherein the preset air pressure of the deodorizing device is the maximum air pressure that the deodorizing device can withstand under different working conditions; When the gas pressure in the air outlet channel exceeds the pressure allowed by the ventilation and deodorization system of the deep drainage tunnel, the liquid sealing layer in the liquid sealing chamber is squeezed and destroyed, and the gas enters the first gas part, the first liquid part, the second liquid part, and the second gas part in sequence, and overflows into the outside atmosphere.

2. The gas pressure protection device according to claim 1, characterized in that: The liquid seal chamber comprises a first partition plate, which is connected to the inner wall surface of the liquid seal chamber to separate the liquid seal chamber into the liquid seal area and the gas washing pressure relief area which are adjacently arranged.

3. The gas pressure protection device according to claim 2, characterized in that: A hole is provided at the bottom of the first partition plate to connect the first liquid part with the second liquid part.

4. The gas pressure protection device according to claim 1, characterized in that: The gas washing and pressure relief zone has a plurality of guide plates, one end of the guide plate is connected to a side wall of the gas washing and pressure relief zone, and the other end extends obliquely upward to form a gap with the other side wall of the gas washing and pressure relief zone. The gaps of two adjacent guide plates are staggered to form an "S"-shaped gas channel in the second liquid portion.

5. The gas pressure protection device according to claim 1, characterized in that: The liquid seal chamber further includes a water replenishment area, and the water replenishment area includes a third gas part and a third liquid part arranged up and down, and the third gas part and the third liquid part are respectively connected to the second gas part and the second liquid part.

6. The gas pressure protection device according to claim 5, characterized in that: The liquid seal chamber further comprises a second partition plate, and the gas washing pressure relief area and the water replenishment area are separated by the second partition plate.

7. The gas pressure protection device according to claim 5, characterized in that: The gas pressure protection device further comprises a water inlet device, the water replenishment area is provided with a float switch, and the float switch is connected to the water inlet device; The float switch is used to control the water inlet device to replenish the liquid sealing medium to the water replenishment area when the liquid level of the second liquid part or the third liquid part is less than a preset threshold value.

8. The gas pressure protection device according to claim 5, characterized in that: The liquid sealing chamber further comprises a venting area, the venting area is communicated with the water replenishing area, a water pump is arranged in the venting area, and the water pump is used to discharge the liquid sealing medium in the first liquid part, the second liquid part and the third liquid part.

9. The gas pressure protection device according to claim 8, characterized in that: The gas pressure protection device also includes a drainage device, and the water pump is connected to the drainage device.

10. The gas pressure protection device according to claim 1, characterized in that: A bottom end of the bypass channel is higher than a liquid level of the first liquid portion.

11. The gas pressure protection device according to claim 1, characterized in that: The gas pressure protection device further comprises an exhaust port, and two ends of the exhaust port are respectively connected to the second gas portion and the outside atmosphere.

12. The gas pressure protection device according to claim 11, characterized in that: The air outlet has a third partition plate, and the third partition plate extends upward from the bottom surface of the air outlet.

13. A ventilation and deodorization system, comprising an air outlet channel and a deodorization device connected to each other, characterized in that: The ventilation and deodorization system further comprises a gas pressure protection device as described in any one of claims 1 to 12, and the first gas portion is connected to the air outlet channel.

14. A deep drainage tunnel, comprising a tunnel body, characterized in that: The deep drainage tunnel further comprises a ventilation and deodorization system as claimed in claim 13, and the air outlet channel is connected to the tunnel body.

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