Recovery device for combustible gas in sewer

Abstract

The utility model discloses a sewer combustible gas recovery device which comprises a gas recovery box and a gas detector, the gas recovery box internally comprises an upper sealing cavity and a lower recovery cavity, the top of the upper sealing cavity is connected with a gas inlet pipeline extending to the outside, and the end of the gas inlet pipeline is connected with a wind collecting cover; a fan frame is connected to the bottom of the air collecting cover, and a plurality of draft fans electrically connected with the gas detector are connected in the fan frame; compared with the prior art, the device has the advantages that combustible gas generated in a sewer is detected through the combustible gas sensor, the exhaust system starts the fan to blow the gas into the gas recovery box, and the combustible gas is temporarily concentrated in activated carbon; the combustible gas adsorbed into the activated carbon can be used as fuel by utilizing the combustibility of the activated carbon, the combustion heat value of the activated carbon is improved, and the device is wide in application range, low in cost, convenient to use and capable of being repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of combustible gas recovery devices, in particular to a sewer combustible gas recovery device. Background Art

[0002] Combustible gas refers to a substance that can be ignited and is in a gaseous state at normal temperature and pressure, such as hydrogen, acetylene, ethylene, ammonia, hydrogen sulfide, etc. Combustible gas has the general properties of gas. A combustible gas with one component is called a single gas, and a mixture of two or more combustible gases is called a mixed combustible gas.

[0003] Safety accidents such as poisoning of sewer construction workers and explosion of sewer manhole covers occur frequently, especially around areas where large amounts of flammable gases are used or produced, so a solution that can solve the corresponding problems is worth proposing. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a sewer combustible gas recovery device in view of the deficiencies raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides a technical solution as follows: a sewer combustible gas recovery device, comprising a gas recovery box and a gas detector, wherein the gas recovery box comprises an upper sealed chamber and a lower recovery chamber, the top of the upper sealed chamber is connected to a gas inlet pipe extending to the outside, the end of the gas inlet pipe is connected to a wind collecting hood, the bottom of the wind collecting hood is connected to a fan rack, and the fan rack is connected to multiple exhaust fans electrically connected to the gas detector;

[0006] The top of the lower recovery chamber is connected to a plurality of first air ducts connected to the upper sealed chamber, the bottom of the first air ducts is connected to a gas absorption box, the bottom of the gas absorption box is connected to a second air duct, and the bottoms of the plurality of second air ducts are commonly connected to an exhaust pipe extending to the outside.

[0007] Furthermore, a filter rack is connected to the bottom of the fan rack to prevent larger foreign objects from entering.

[0008] Furthermore, an upper activated carbon support net and a lower activated carbon support net are respectively connected to the upper and lower parts of the gas absorption box, so as to facilitate the operation of supporting the activated carbon.

[0009] Furthermore, the front side of the gas absorption box is connected with a feeding sealing door located below the upper activated carbon support net, and the front side of the gas absorption box is connected with a discharging sealing door located above the lower activated carbon support net, which facilitates upper feeding and bottom discharging operations.

[0010] Furthermore, the front side of the gas recovery box is connected to a sealed maintenance door that cooperates with the recovery chamber below, making it convenient to perform maintenance and repair operations inside.

[0011] Furthermore, the first air duct is connected to an electric control valve, the exhaust pipe is connected to a combustible gas probe, and the second air duct is connected to a one-way valve, which can facilitate the control of gas flow operation.

[0012] The advantages of the sewer combustible gas recovery device of the present invention over the prior art are: the combustible gas generated in the sewer is detected by a combustible gas sensor, the exhaust system starts the fan to blow the gas into the gas recovery box, and the combustible gas is temporarily concentrated in the activated carbon. The combustible gas adsorbed in the activated carbon can be used as fuel by utilizing the combustibility of the activated carbon, thereby improving the combustion calorific value of the activated carbon. The utility model has a wide range of applications, low cost, easy use, and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a first structural schematic diagram of a sewer combustible gas recovery device of the utility model.

[0014] Figure 2 This is a second structural schematic diagram of a sewer combustible gas recovery device of the utility model.

[0015] Figure 3 This is a third structural schematic diagram of a sewer combustible gas recovery device of the utility model.

[0016] Figure 4 This is a first cross-sectional structural schematic diagram of a sewer combustible gas recovery device of the utility model.

[0017] Figure 5 This is a second cross-sectional structural schematic diagram of a sewer combustible gas recovery device of the utility model.

[0018] As shown in the figure: 1. Gas recovery box; 2. Gas inlet pipe; 3. Wind collecting hood; 4. Fan rack; 5. Exhaust fan; 6. Filter rack; 7. Upper sealed chamber; 8. Lower recovery chamber; 9. First air duct; 10. Gas absorption box; 11. Second air duct; 12. Exhaust pipe; 13. Combustible gas probe; 14. Upper activated carbon support net; 15. Lower activated carbon support net; 16. Feeding sealing door; 17. Discharge sealing door; 18. Sealing maintenance door; 19. Electric control valve; 20. One-way valve. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings.

[0020] Combined with attachment Figure 1-5, a sewer combustible gas recovery device includes a gas recovery box 1 and a gas detector 21. The gas recovery box 1 includes an upper sealed chamber 7 and a lower recovery chamber 8. The top of the upper sealed chamber 7 is connected to a gas inlet pipe 2 extending to the outside, and the end of the gas inlet pipe 2 is connected to a wind collecting hood 3. The bottom of the wind collecting hood 3 is connected to a fan rack 4. The fan rack 4 is connected to a plurality of exhaust fans 5 electrically connected to the gas detector 21. The bottom of the fan rack 4 is connected to a filter rack 6. That is, during actual installation, the gas recovery box 1 is generally set outside the sewer, and then the fan rack 4 is aimed at the inside of the sewer. At the same time, the gas detector 21 is set in the sewer. The combustible gas concentration is detected by the gas detector 21. If the concentration is high, the exhaust fan 5 is started to draw the combustible gas into the gas recovery box 1 for adsorption recovery operation.

[0021] The top of the lower recovery chamber 8 is connected to a plurality of first air ducts 9 that are connected to the upper sealed chamber 7. The bottom of the first air duct 9 is connected to a gas absorption box 10. The bottom of the gas absorption box 10 is connected to a second air duct 11. The bottoms of the plurality of second air ducts 11 are commonly connected to an exhaust pipe 12 extending to the outside. The first air duct 9 is connected to an electric control valve 19. The exhaust pipe 12 is connected to a combustible gas probe 13. The second air duct 11 is connected to a one-way valve 20. Generally, it refers to opening the electric control valve 19 of a gas absorption box 10, and sensing the combustible gas concentration of the exhaust gas through the combustible gas probe 13. If the combustible gas concentration of the exhaust gas is low, close the electric control valve 19 of the gas absorption box 10, and start another electric control valve to continue recovery. The provision of a one-way valve 20 can prevent the gas from affecting other gas absorption boxes 10.

[0022] The gas absorption box 10 is respectively connected with an upper activated carbon support net 14 and a lower activated carbon support net 15 at the upper and lower parts. The front side of the gas absorption box 10 is connected with a feeding sealing door 16 located below the upper activated carbon support net 14. The front side of the gas absorption box 10 is connected with a discharge sealing door 17 located above the lower activated carbon support net 15. The front side of the gas recovery box 1 is connected with a sealing maintenance door 18 that cooperates with the recovery chamber 8 below. When it is necessary to change the material, open the sealing maintenance door 18 and the discharge sealing door 17 to discharge the activated carbon that adsorbs the combustible gas. This activated carbon is used as fuel together with the combustible gas, which increases the combustion calorific value of the activated carbon, reduces the waste of combustible gas, and improves the safety of the sewer. Then close the discharge sealing door 17, open the feeding sealing door 16 and put in new activated carbon.

[0023] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A sewer combustible gas recovery device, comprising a gas recovery box (1) and a gas detector (21), characterized in that: The gas recovery box (1) includes an upper sealed chamber (7) and a lower recovery chamber (8), the top of the upper sealed chamber (7) is connected to a gas inlet pipe (2) extending to the outside, the end of the gas inlet pipe (2) is connected to a wind collecting cover (3), the bottom of the wind collecting cover (3) is connected to a fan rack (4), and the fan rack (4) is connected to a plurality of exhaust fans (5) electrically connected to the gas detector (21); The top of the lower recovery chamber (8) is connected to a plurality of first air guide pipes (9) that are in communication with the upper sealed chamber (7); the bottom of the first air guide pipes (9) is connected to a gas absorption box (10); the bottom of the gas absorption box (10) is connected to a second air guide pipe (11); the bottoms of the plurality of second air guide pipes (11) are commonly connected to an exhaust pipe (12) extending to the outside.

2. A sewer combustible gas recovery device according to claim 1, characterized in that: The bottom of the fan frame (4) is connected with a filter frame (6).

3. The sewer combustible gas recovery device according to claim 1, characterized in that: An upper activated carbon support net (14) and a lower activated carbon support net (15) are respectively connected to each other in the gas absorption box (10).

4. A sewer combustible gas recovery device according to claim 3, characterized in that: The front side of the gas absorption box (10) is connected to a feeding sealing door (16) located below the upper activated carbon support net (14), and the front side of the gas absorption box (10) is connected to a discharging sealing door (17) located above the lower activated carbon support net (15).

5. The sewer combustible gas recovery device according to claim 1, characterized in that: The front side of the gas recovery box (1) is connected to a sealed maintenance door (18) that matches the recovery chamber (8) below.

6. The sewer combustible gas recovery device according to claim 1, characterized in that: The first air guide pipe (9) is connected to an electric control valve (19), the exhaust pipe (12) is connected to a combustible gas probe (13), and the second air guide pipe (11) is connected to a one-way valve (20).

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