A gas source filtering device suitable for a nitrogen gas injection unit in a desert environment

Abstract

The utility model relates to a kind of gas source filter device suitable for nitrogen gas injection unit in desert environment, comprising: sand filter, including the casing for containing liquid;Exhaust component, including the exhaust pipe passing through the casing and fan and sand dust filter screen on exhaust pipe, one end of the exhaust pipe is stretched to the outside of casing, the other end is stretched to the liquid level below in casing;Air supply pipe, one end is stretched to the casing and is located above liquid level, the other end is used to connect with the air compressor of nitrogen gas injection unit.The utility model solves the problem that the air filter of air compressor of nitrogen generator in desert environment is easy to block and affect nitrogen production, provides a kind of gas source filter device suitable for nitrogen gas injection unit in desert environment, can remove sand dust in air completely, so as to obtain sufficient clean gas source.

Description

Technical Field

[0001] This utility model relates to the field of reservoir gas injection and energy replenishment, specifically a gas source filtration device suitable for nitrogen injection units in desert environments. Background Technology

[0002] Injecting nitrogen into fractured-vuggy reservoirs is an effective method for replenishing energy. A nitrogen generator adsorbs oxygen and other pollutants from the air, purifying the nitrogen to over 99.5% before injecting it into the formation. However, because oil and gas fields are located in areas with over 200 days of natural dust storms annually, significant dust storms can severely clog the air compressor's air filter, rapidly reducing air intake and significantly impacting nitrogen purity, preventing it from reaching 99.5%. This forces the unit to shut down and restart injection when the dust subsides. The shutdown and startup of large units require considerable time, affecting the timeliness of nitrogen injection and preventing sufficient injection as planned, thus impacting the overall effectiveness of the gas injection system. Furthermore, frequent startups and shutdowns significantly increase on-site workload and can reduce the unit's operational lifespan. Summary of the Invention

[0003] This invention solves the problem that the air filter of the air compressor of a nitrogen generator in a desert environment is easily clogged, affecting nitrogen production. It provides an air source filtration device suitable for nitrogen injection units in desert environments, which can completely remove sand and dust from the air, thereby obtaining a sufficient amount of clean air.

[0004] This utility model discloses a gas source filtration device suitable for nitrogen injection units in desert environments, comprising:

[0005] A sand filter, including a housing for containing liquid;

[0006] The ventilation assembly includes a ventilation pipe passing through the housing and a fan and a dust filter screen mounted on the ventilation pipe. One end of the ventilation pipe extends outside the housing, and the other end extends below the liquid level inside the housing.

[0007] The air supply pipe extends into the housing and is above the liquid level at one end, and is used to connect to the air compressor of the nitrogen injection unit at the other end.

[0008] Preferably, the housing is provided with a horizontally arranged first liquid control baffle, which is located between the liquid surface and one end of the air supply pipe that extends into the housing. The first liquid control baffle has multiple vertically penetrating vent holes.

[0009] Preferably, the housing is provided with a second liquid control baffle that is horizontally arranged and located between the first liquid control baffle and the end of the air supply pipe that extends into the housing. The second liquid control baffle has a plurality of vertically penetrating vent holes.

[0010] Preferably, the air inlet of the air supply duct is equipped with a liquid separation filter.

[0011] Preferably, the bottom wall of the shell is funnel-shaped, and the lowest end of the bottom wall is provided with a liquid phase outlet.

[0012] Preferably, the side wall of the housing is provided with a filter inlet, which is located between the bottom wall of the housing and the first liquid control baffle. The gas source filtration device also includes a liquid filtration assembly, which includes a filter circulation pipe. One end of the filter circulation pipe is connected to the liquid phase outlet, and the other end is connected to the filter inlet. The filter circulation pipe is provided with a circulation pump and a filter.

[0013] Preferably, the filter circulation pipe is provided with two filters connected in parallel.

[0014] Preferably, the sand filter is further provided with a first level gauge and a second level gauge installed on the housing. The first level gauge is higher than the second level gauge. The circulation pump is turned on according to the signal from the second level gauge and turned off according to the signal from the first level gauge.

[0015] Preferably, the opening of the exhaust pipe at the end outside the housing faces downwards.

[0016] Preferably, the dust filter is located at the opening at the end of the exhaust pipe located outside the housing.

[0017] Compared with the prior art, this utility model has the following advantages: The air source filtration device of this utility model, which is suitable for nitrogen injection units in desert environments, blows the extracted air containing sand and dust into the liquid. The dry sand and dust quickly dissolve in the liquid after encountering water and remain in the liquid, unable to flow with the gas. In this way, the sand and dust are separated from the air, obtaining a clean air source, keeping the air compressor running smoothly, ensuring sufficient air supply, and thus obtaining nitrogen with sufficient purity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the gas source filtration device for a nitrogen injection unit in a desert environment according to an embodiment of the present invention, with the liquid filtration component removed.

[0019] Figure 2 This is a top view of the gas source filtration device of a nitrogen injection unit suitable for desert environments according to an embodiment of the present invention, with the liquid filtration component removed.

[0020] Figure 3 This is a schematic diagram of the gas source filtration device for a nitrogen injection unit suitable for desert environments, according to an embodiment of the present invention.

[0021] Figure Labels

[0022] 1. Sand filter, 11. Housing, 111. Side wall, 1111. Filter inlet, 112. Top wall, 113. Bottom wall, 1131. Liquid phase outlet, 12. First liquid control baffle, 121. Vent hole, 13. Second liquid control baffle, 131. Vent hole, 14. First liquid level gauge, 15. Second liquid level gauge.

[0023] 2. Exhaust assembly, 21. Exhaust duct, 22. Fan, 23. Dust filter;

[0024] 3 air supply ducts, 31 liquid separation filter screen;

[0025] 4 Liquid filtration assembly, 41 Filter circulation pipe, 42 Circulation pump, 43 Filter. Detailed Implementation

[0026] This utility model provides a gas source filtration device suitable for nitrogen injection units in desert environments, connected upstream of the nitrogen injection unit, such as... Figure 1-2 As shown, the system includes a sand filter 1, an exhaust assembly 2, and an air supply duct 3. The sand filter 1 includes a housing 11 for containing liquid. In this embodiment, the housing 11 includes a side wall 111, a top wall 112, and a bottom wall 113. The liquid contained therein can be water. The exhaust assembly 2 includes an exhaust duct 21 passing through the top wall 112 of the housing 11, a fan 22, and a dust filter 23 mounted on the exhaust duct 21. One end of the exhaust duct 21 extends outside the housing 11. In this embodiment, the opening at this end of the exhaust duct 21 faces downwards to minimize the intake of dust. The opening at this end of the exhaust duct 21 is also equipped with the aforementioned dust filter 23 to block most of the dust. The other end of the exhaust duct 21 extends below the liquid surface inside the housing 11, delivering air into the liquid. One end of the air supply pipe 3 extends into the housing 11 and is above the liquid surface to receive filtered air. The other end of the air supply pipe 3 is connected to the air compressor (not shown in the figure) of the nitrogen injection unit to send the filtered air into the air compressor.

[0027] This invention relates to an air source filtration device for nitrogen injection units in desert environments. It blows extracted air containing sand and dust into a liquid. The dry sand and dust quickly dissolve in the liquid upon contact with water and remain there, unable to flow with the gas. This separates the sand and dust from the air, obtaining a clean air source, keeping the air compressor running smoothly, ensuring a sufficient air supply, and thus obtaining nitrogen of sufficient purity.

[0028] like Figure 1As shown, the housing 11 is provided with a horizontally arranged first liquid control baffle 12, located between the liquid surface and the end of the air supply pipe 3 extending into the housing 11. The first liquid control baffle 12 has multiple vertically penetrating vent holes 121. The first liquid control baffle 12 is close to the liquid surface, and the vent holes 121 allow air to pass upwards while blocking the liquid below, preventing the liquid from surging upwards under air pressure. In this embodiment, the housing 11 is provided with a horizontally arranged second liquid control baffle 13 located between the first liquid control baffle 12 and the end of the air supply pipe 3 extending into the housing 11. The second liquid control baffle 13 has multiple vertically penetrating vent holes 131, and can further separate some of the liquid and air passing through the first liquid control baffle 12. In this embodiment, the air inlet of the air supply pipe 3 is provided with a liquid separation filter 31, which can remove small droplets of liquid carried in the air, thereby reducing the humidity of the air.

[0029] like Figure 1 As shown, the bottom wall 113 of the shell 11 is funnel-shaped, and a liquid phase outlet 1131 is provided at the lowest end of the bottom wall 113. Under the action of gravity, the sand and dust in the liquid will accumulate at the lowest end of the bottom wall 113 and be discharged from the liquid phase outlet 1131 at the lowest end.

[0030] In this embodiment, the side wall 111 of the housing 11 is provided with a filter inlet 1111, which is located between the bottom wall 113 of the housing 11 and the first liquid control baffle 12. The gas source filtration device also includes a liquid filtration assembly 4, such as... Figure 3 As shown, the liquid filtration assembly 4 includes a filter circulation pipe 41. One end of the filter circulation pipe 41 is connected to the liquid phase outlet 1131, and the other end is connected to the filter inlet 1111. The filter circulation pipe 41 is equipped with a circulation pump 42 and a filter 43. The liquid filtration assembly 4 filters the sand and dust from the liquid carrying sand and dust, and then returns the clean water to the housing 11, thus making the water recyclable. In this embodiment, the filter circulation pipe 41 is equipped with two parallel filters 43, one of which is in normal use and the other is a spare filter 43.

[0031] like Figure 1 As shown, the housing 11 is also equipped with a first level gauge 14 and a second level gauge 15. The first level gauge 14 is higher than the second level gauge 15. The circulation pump 42 starts according to the signal from the second level gauge 15 and stops according to the signal from the first level gauge 14. In this way, the circulation pump 42 can be automatically controlled to start at a set low level to send water into the housing 11 and to stop sending water when the set high level is reached.

[0032] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Various modifications or equivalent substitutions made by those skilled in the art within the spirit and scope of this utility model also fall within the scope of protection of this utility model.

Claims

1. A gas source filtration device suitable for nitrogen injection units in desert environments, characterized in that, include: A sand filter, including a housing for containing liquid; The ventilation assembly includes a ventilation duct passing through the housing and a fan and a dust filter screen mounted on the ventilation duct. One end of the ventilation duct extends outside the housing, and the other end extends below the liquid surface inside the housing. The fan and the dust filter screen are located outside the housing. The air supply pipe extends into the housing and is above the liquid level at one end, and is used to connect to the air compressor of the nitrogen injection unit at the other end.

2. The air source filtration device according to claim 1, characterized in that, The housing is provided with a horizontally arranged first liquid control baffle, which is located between the liquid surface and one end of the air supply pipe that extends into the housing. The first liquid control baffle has multiple vertically penetrating vent holes.

3. The air source filtration device according to claim 2, characterized in that, The housing is provided with a second liquid control baffle that is horizontally arranged and located between the first liquid control baffle and the end of the air supply pipe that extends into the housing. The second liquid control baffle has a plurality of vertically penetrating vent holes.

4. The gas source filtration device according to any one of claims 1-3, characterized in that, The air inlet of the air supply duct is equipped with a liquid separation filter.

5. The gas source filtration device according to claim 3, characterized in that, The shell includes a top wall, a bottom wall, and side walls. The bottom wall of the shell is funnel-shaped, and a liquid phase outlet is provided at the lowest end of the bottom wall.

6. The air source filtration device according to claim 5, characterized in that, The side wall of the housing is provided with a filter inlet, which is located between the bottom wall of the housing and the first liquid control baffle. The gas source filtration device also includes a liquid filtration assembly, which includes a filter circulation pipe. One end of the filter circulation pipe is connected to the liquid phase outlet, and the other end is connected to the filter inlet. The filter circulation pipe is provided with a circulation pump and a filter.

7. The air source filtration device according to claim 6, characterized in that, The filter circulation pipe is equipped with two filters connected in parallel.

8. The air source filtration device according to claim 6, characterized in that, The sand filter is also equipped with a first level gauge and a second level gauge installed on the housing. The first level gauge is higher than the second level gauge. The circulation pump is turned on according to the signal from the second level gauge and turned off according to the signal from the first level gauge.

9. The air source filtration device according to claim 1, characterized in that, The opening of the exhaust pipe at the end outside the housing faces downwards.

10. The air source filtration device according to claim 9, characterized in that, The dust filter is located at the opening of the exhaust pipe at the end outside the housing.

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