Low-pressure fuel gas recovery device

Abstract

The utility model provides a low-pressure fuel gas recovery device which comprises a compressor and a recovery storage tank, a double-filter-pipe assembly is installed at the gas inlet end of the compressor, a three-way gas outlet pipe is connected to the gas outlet end of the compressor through a flange, and gas outlet valves are connected to the two gas outlet ends of the three-way gas outlet pipe through flanges. And two connectors at the front end of the three-way air inlet pipe are respectively connected with a filter pipe through flanges. Due to the arrangement of the three-way gas inlet pipe, the filter pipe, the access hole, the end cover and the gas inlet valve, fuel gas can be recycled when the filter device is replaced or cleaned, and the recycling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel gas recovery, and in particular relates to a low-pressure fuel gas recovery device. Background Art

[0002] At present, in the process of fuel gas transportation, normal inspection and maintenance of equipment and facilities and renovation and expansion projects all require the fuel gas to be vented, and the vented fuel gas is recovered through a recovery device to avoid waste of fuel gas. The existing fuel gas recovery device includes a body and a recovery valve, and the recovery valve is fixedly installed inside the body. The recovery valve includes a valve body, and the interior of the valve body is provided with an air intake chamber, a first air intake cavity and a second air intake cavity. The air intake chamber is located below the first air intake cavity, and the first air intake cavity is connected to the air intake chamber. This type of fuel gas recovery device usually needs to stop the recovery of fuel gas when replacing the filter plate, which affects the recovery efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a low-pressure fuel gas recovery device, which can recover the fuel gas when replacing or cleaning the filter device, thereby improving the recovery efficiency.

[0004] The utility model is realized by the following technical solutions:

[0005] A low-pressure fuel gas recovery device includes a compressor and a recovery storage tank, characterized in that a double filter tube assembly is installed at the air inlet end of the compressor, the air outlet end of the compressor is flange-connected with a three-way air outlet pipe, both air outlet ends of the three-way air outlet pipe are flange-connected with air outlet valves, the double filter tube assembly includes a three-way air inlet pipe, filter tubes are flange-connected at two interfaces at the front end of the three-way air inlet pipe, an inspection port is integrated at the lower part of one end of the filter tube, a metal filter screen is fixedly installed inside the other end of the filter tube, and an end cover is flange-connected at the lower part of the inspection port.

[0006] Preferably, the rear end of the three-way air inlet pipe is connected to the air inlet pipeline of the compressor.

[0007] Preferably, two recovery storage tanks are provided, and the inlet of each recovery storage tank is flange-connected with a tank valve.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. In the utility model, the arrangement of the three-way air inlet pipe, the filter pipe, the inspection port, the end cover and the air inlet valve is conducive to the recovery of fuel gas when replacing or cleaning the filter device, thereby improving the recovery efficiency.

[0010] 2. In the utility model, the recovery and storage tank and the arrangement of the tank mouth valve are conducive to the recovery and storage of fuel gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a structural schematic diagram of a double filter tube assembly of the utility model.

[0013] In the figure:

[0014] 1. Compressor; 2. Double filter tube assembly; 3. Three-way air outlet pipe; 4. Air outlet valve; 5. Recovery storage tank; 6. Tank mouth valve; 21. Three-way air inlet pipe; 22. Filter tube; 23. Inspection port; 24. End cover; 25. Air inlet valve 25. DETAILED DESCRIPTION

[0015] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1 As shown, a low-pressure fuel gas recovery device includes a compressor 1 and a recovery storage tank 5, a double filter tube assembly 2 is installed at the air inlet end of the compressor 1, a three-way air outlet pipe 3 is flange-connected to the air outlet end of the compressor 1, both air outlet ends of the three-way air outlet pipe 3 are flange-connected to air outlet valves 4, two recovery storage tanks 5 are provided, and a tank mouth valve 6 is flange-connected at the inlet of each recovery storage tank 5, and the two tank mouth valves 6 are respectively connected to the two air outlet valves 4 by pipeline.

[0016] In this embodiment, combined with the Figure 2 As shown, the double filter tube assembly 2 includes a three-way air inlet pipe 21, and filter tubes 22 are respectively arranged at the two front end interfaces of the three-way air inlet pipe 21, and an air inlet valve 25 is flange-connected between the filter tube 22 and the front end interface of the three-way air inlet pipe 21, and an inspection port 23 is integrally arranged at the lower part of one end of the filter tube 22, and a metal filter screen is fixedly installed inside the other end of the filter tube 22, and the lower flange of the inspection port 23 is connected to the end cover 24, and the end of the filter tube 22 provided with the inspection port 23 is flange-connected to the air inlet valve 25.

[0017] In this embodiment, specifically, the rear end of the three-way air intake pipe 21 is connected to the air intake pipeline of the compressor 1 .

[0018] How it works

[0019] In the utility model, when the fuel gas is recovered, the compressor 1 will transport the fuel gas through the double filter tube assembly 2 to the three-way air outlet pipe 3, one of the air outlet valves 4 and the corresponding tank mouth valve 6 will be opened, and the other air outlet valve 4 and the corresponding tank mouth valve 6 will be closed, so that the fuel gas will be recovered into a recovery storage tank 5. After the recovery storage tank 5 is full, the tank mouth valve 6 will be closed to facilitate the replacement of the recovery storage tank 5, and then the air outlet valve 4 and the corresponding tank mouth valve 6 that were previously in a closed state will be opened, so that the fuel gas will be recovered into another recovery storage tank 5, one group of air intake valves 25 will be opened, and the other group of air intake valves 25 will be closed, so that impurities in the fuel gas are filtered by a filter tube 22, and when the filter tube 22 needs to be inspected and cleaned, the group of air intake valves 25 will be closed, so that it is convenient for the user to open the end cover 24 and use external tools to clean the impurities in the filter tube 22.

[0020] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A low-pressure fuel gas recovery device, comprising a compressor (1) and a recovery storage tank (5), characterized in that: A double filter tube assembly (2) is installed at the air inlet end of the compressor (1); a three-way air outlet pipe (3) is flange-connected at the air outlet end of the compressor (1); both air outlet ends of the three-way air outlet pipe (3) are flange-connected to air outlet valves (4); the double filter tube assembly (2) comprises a three-way air inlet pipe (21); filter tubes (22) are flange-connected at two interfaces at the front end of the three-way air inlet pipe (21); an inspection port (23) is integrally provided at the lower part of one end of the filter tube (22); a metal filter screen is fixedly installed inside the other end of the filter tube (22); and an end cover (24) is flange-connected at the lower part of the inspection port (23).

2. The low-pressure fuel gas recovery device according to claim 1, characterized in that: The rear end of the three-way air inlet pipe (21) is connected to the air inlet pipeline of the compressor (1).

3. The low-pressure fuel gas recovery device according to claim 1, characterized in that: The recovery storage tank (5) is provided with two, and the inlet of each recovery storage tank (5) is flange-connected with a tank mouth valve (6).

4. The low-pressure fuel gas recovery device according to claim 3, characterized in that: The two tank port valves (6) are respectively connected to the pipelines of the two gas outlet valves (4).

5. The low-pressure fuel gas recovery device according to claim 1, characterized in that: An air intake valve (25) is flange-connected between the filter tube (22) and the front end interface of the three-way air intake pipe (21).

6. The low-pressure fuel gas recovery device according to claim 1, characterized in that: The filter tube (22) is provided with an inspection port (23), one end of which is flange-connected to an air inlet valve (25).

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