Filtering device for gas field water treatment

Abstract

The utility model provides a filtering device for gas field water treatment. The filtering device solves the problem that solid impurities on the surface of a filtering net can be cleaned only by pausing water treatment work of an existing filtering device for gas field water treatment. The filter comprises a cylindrical shell and a first filter screen detachably connected to the interior of the shell, one end of the shell is a water inlet, the other end of the shell is a water outlet, the first filter screen is cylindrical and internally provided with a dirt collecting cavity, an inlet of the dirt collecting cavity right faces the water inlet, and a second filter screen and a driving structure used for driving the second filter screen to act are further arranged in the shell. When the first filter screen is inserted, the first filter screen pushes the second filter screen to enable the second filter screen to be in a non-working state, and when the first filter screen is taken away, the second filter screen is in a working state under the action of the driving structure. When the first filter screen is taken out, the second filter screen is in a working state under the action of the driving structure, and the gas field water is filtered, so that the filter device is always in the working state when the first filter screen is taken out.

Description

Technical Field

[0001] This utility model belongs to the field of gas field water treatment technology and relates to a filtration device for gas field water treatment. Background Technology

[0002] Gas field extraction generates a large amount of gas field water, which is harmful to the environment and cannot be directly discharged. Currently, the common method for treating gas field water is distillation, which utilizes the different boiling points of various substances to vaporize and release them. Before distillation, workers need to filter the gas field water to remove solid impurities; a common filtration method is using a filter screen.

[0003] For example, a Chinese patent discloses a filtration device [authorization announcement number CN215427605U], which includes a housing configured as a cylindrical structure with openings at both ends, and an inlet pipe and an outlet pipe respectively provided on both sides; an upper end cover installed on the top of the housing to close the top opening of the housing; a filter element body installed inside the housing, with the top surface of the filter element body as the inlet end face, the side surface of the filter element body as the outlet end face, and the bottom surface of the filter element body as the sewage discharge end face; and a lower end cover detachably installed on the bottom of the housing to close the bottom opening of the housing; a closed sewage storage space is formed between the lower end cover and the bottom surface of the filter element body.

[0004] Although the filter can filter out these solid impurities, these impurities will accumulate on the surface of the filter and easily clog it over time. This forces staff to stop processing and clean the solid impurities on the surface, hindering the normal operation of the processing. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a filtration device for gas field water treatment that allows for cleaning of the filter screen without interrupting the processing operation.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A filtration device for gas field water treatment includes a cylindrical shell and a first filter screen detachably connected inside the shell. One end of the shell is an inlet and the other end is an outlet. The first filter screen is cylindrical and has a sludge collection chamber inside. The inlet of the sludge collection chamber is directly opposite the inlet. The shell also contains a second filter screen and a drive structure for driving the second filter screen. When the first filter screen is inserted, the first filter screen pushes the second filter screen to put the second filter screen into a non-working state. When the first filter screen is removed, the second filter screen is put into a working state under the action of the drive structure.

[0008] Normally, the first filter screen filters the gas field water entering the shell, while solid impurities remain in the sludge collection chamber. When there are a lot of solid impurities in the sludge collection chamber, the first filter screen needs to be removed and cleaned. When the first filter screen is removed, the second filter screen is in working condition under the action of the drive structure to filter the gas field water entering the shell, ensuring that the filtration device is always in working condition when the first filter screen is removed.

[0009] The filtration system primarily uses a first filter screen for filtration, while the second filter screen serves only as a temporary filter. The amount of solid impurities remaining on the second filter screen is minimal and does not affect the filtration efficiency. During the removal of the first filter screen, it remains fully engaged while the second filter screen is still in operation, ensuring that all gas field water is filtered out.

[0010] In the above-mentioned filtration device for gas field water treatment, the housing is provided with an annular step, the second filter screen is plate-shaped and is rotatably disposed at the annular step via a rotating shaft. When the second filter screen is in working condition, the side of the second filter screen facing the water outlet is attached to the annular step and completely cuts off the inner cavity of the housing. When the second filter screen is not in working condition, it is tightly attached to the outer wall of the first filter screen under the action of the driving structure.

[0011] The shell has a rectangular cross-section, and the second filter screen has the same shape as the shell's cross-section. The rotating shaft extends perpendicular to the length of the shell and is parallel to one of its sides. The second filter screen can swing around the centerline of the rotating shaft. In operation, the second filter screen is fitted with the inner cavity of the shell with a clearance, ensuring that the free end of the second filter screen does not collide with the inner wall of the shell. The distance from the annular step to the outlet is less than the length of the first filter screen, which facilitates lifting the second filter screen when the first filter screen is inserted.

[0012] In the aforementioned filtration device for gas field water treatment, the drive structure includes a torsion spring sleeved on a rotating shaft. One end of the torsion spring acts on the second filter screen, and the other end acts on an annular step. The torsion spring can move the second filter screen from a non-working state to a working state. The spring force is moderate, which allows the second filter screen to move from a non-working state to a working state while minimizing resistance to the first filter screen.

[0013] In the aforementioned filtration device for gas field water treatment, the second filter screen, when in operation, has a recessed cavity on the side facing the water inlet. This recessed cavity can be used to store solid impurities filtered out by the second filter screen, preventing the second filter screen from failing to return to its original position.

[0014] In the aforementioned filtration device for gas field water treatment, the side wall of the housing has an opening, and a cover plate is detachably connected to the opening. When not in operation, the second filter screen is located inside the cover plate. The opening facilitates the installation and replacement of the second filter screen, and also allows for the removal of solid impurities from the screen. The cover plate seals the air intake of the opening, preventing leakage of gas field water.

[0015] In the aforementioned filtration device for gas field water treatment, a connecting flange is formed at the end of the first filter screen near the outlet. The connecting flange is detachably connected to the end of the housing located at the outlet. The connecting flange is detachably connected to the housing by bolts or other means, and a threaded hole for engaging with the bolts is provided on the end of the housing located at the outlet.

[0016] In the above-mentioned filtration device for gas field water treatment, the housing is provided with a water inlet connector at one end of the water inlet. The inner end of the water inlet connector extends into the housing and is positioned directly opposite the sludge collection chamber. The diameter of the inner hole of the water inlet connector is less than or equal to the diameter of the sludge collection chamber.

[0017] This can reduce or prevent gas field water from flowing from the outside to the inside of the first filter screen, and prevent solid impurities from being blocked on the outside of the first filter screen, which is beneficial for the collection of solid impurities.

[0018] Compared with existing technologies, the filtration device for water treatment in this gas field has the following advantages:

[0019] When there are many solid impurities in the collection chamber, the first filter screen needs to be removed and cleaned. When the first filter screen is removed, the second filter screen is in working condition under the action of the drive structure to filter the gas field water entering the shell, ensuring that the filter device is always in working condition when the first filter screen is removed. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the first filter screen when it is in operation.

[0021] Figure 2 This is a cross-sectional view of the second filter screen when it is in operation.

[0022] In the diagram, 1 is the housing; 2 is the first filter screen; 3 is the dirt collection chamber; 4 is the second filter screen; 5 is the annular step; 6 is the rotating shaft; 7 is the concave cavity; 8 is the cover plate; 9 is the connecting flange; and 10 is the water inlet connector. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1The gas field water treatment filtration device shown includes a cylindrical and vertically arranged shell 1 and a first filter screen 2 detachably connected inside the shell 1. The upper end of the shell 1 is a water inlet and the lower end is a water outlet. The shell 1 is provided with a water inlet connector 10 at the end of the shell 1 located at the water inlet. The water inlet connector 10 is vertically arranged and its lower end extends into the shell 1.

[0025] like Figure 1 As shown, the first filter screen 2 is cylindrical and has a dirt collection chamber 3 inside. The first filter screen 2 enters the housing 1 from bottom to top through the water outlet. The upper end of the dirt collection chamber 3 is the inlet and is directly opposite the water inlet connector 10. The diameter of the inner hole of the water inlet connector 10 is less than or equal to the diameter of the dirt collection chamber 3.

[0026] like Figure 1 As shown, a second filter screen 4 and a drive structure for driving the second filter screen 4 are also provided inside the housing 1, such as... Figure 1 and Figure 2 As shown, the second filter screen 4, when in operation, has a recess 7 on the side facing the water inlet. When the first filter screen 2 is inserted, the first filter screen 2 pushes the second filter screen 4 to put the second filter screen 4 into a non-operating state. When the first filter screen 2 is removed, the second filter screen 4 is put into an operating state under the action of the driving structure.

[0027] Normally, the first filter screen 2 filters the gas field water entering the shell 1, while solid impurities remain in the collection chamber 3. When there are a lot of solid impurities in the collection chamber 3, the first filter screen 2 needs to be removed and cleaned. When the first filter screen 2 is removed, the second filter screen 4 is in working condition under the action of the driving structure to filter the gas field water entering the shell 1, ensuring that the filtration device is always in working condition when the first filter screen 2 is removed.

[0028] The filtration device primarily uses the first filter screen 2 for filtration, while the second filter screen 4 serves only as a temporary filter. The amount of solid impurities remaining on the second filter screen 4 is small and will not affect the filtration effect. During the removal of the first filter screen 2, the first filter screen 2 is not completely detached from the housing 1 while the second filter screen 4 is fully operational. This ensures that all gas field water is filtered out.

[0029] like Figure 1 and Figure 2 As shown, the housing 1 has an annular step 5 inside. The second filter screen 4 is plate-shaped and is rotatably mounted on the annular step 5 via a rotating shaft 6. When the second filter screen 4 is in working condition, the side facing the water outlet is attached to the annular step 5 and completely cuts off the inner cavity of the housing 1. When the second filter screen 4 is not in working condition, it is tightly attached to the outer wall of the first filter screen 2 under the action of the driving structure.

[0030] The shell 1 has a rectangular cross-section, and the second filter screen 4 has the same shape as the cross-section of the shell 1. The rotating shaft 6 extends along the length direction perpendicular to the shell 1 and is parallel to one of the sides of the shell 1. The second filter screen 4 can swing around the centerline of the rotating shaft 6. When in operation, the second filter screen 4 is in clearance fit with the inner cavity of the shell 1 to ensure that the free end of the second filter screen 4 will not collide with the inner wall of the shell 1. The distance from the annular step 5 to the outlet is less than the length of the first filter screen 2, which helps to lift the second filter screen 4 when the first filter screen 2 is inserted.

[0031] In this embodiment, the driving structure includes a torsion spring sleeved on the rotating shaft 6. One end of the torsion spring acts on the second filter screen 4, and the other end acts on the annular step 5. The torsion spring can move the second filter screen 4 from a non-working state to a working state.

[0032] like Figure 1 and Figure 2 As shown, the side wall of the housing 1 has an opening, and a cover plate 8 is detachably connected to the opening. When not in operation, the second filter screen 4 is located inside the cover plate 8. The opening facilitates the installation and replacement of the second filter screen 4 when not in operation, and also facilitates the removal of solid impurities from the second filter screen 4. The cover plate 8 can seal the air intake of the opening to prevent leakage of water from the gas field.

[0033] like Figure 1 and Figure 2 As shown, a connecting flange 9 is formed at the end of the first filter screen 2 near the water outlet. The connecting flange 9 is detachably connected to the end of the housing 1 located at the water outlet. The connecting flange 9 is detachably connected to the housing 1 by bolts or other means. A threaded hole for engaging with the bolts is provided on the end of the housing 1 located at the water outlet.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A filtration device for gas field water treatment, comprising a cylindrical shell (1) and a first filter screen (2) detachably connected to the shell (1), one end of the shell (1) being an inlet and the other end being an outlet, the first filter screen (2) being cylindrical and having a dirt collection chamber (3) inside, the inlet of the dirt collection chamber (3) being directly opposite the inlet, the shell (1) also having a second filter screen (4) and a drive structure for driving the second filter screen (4) to move, when the first filter screen (2) is inserted, the first filter screen (2) pushes the second filter screen (4) to make the second filter screen (4) in a non-working state, when the first filter screen (2) is removed, the second filter screen (4) is in a working state under the action of the drive structure.

2. The filtration device for gas field water treatment according to claim 1, characterized in that, The housing (1) is provided with an annular step (5). The second filter screen (4) is plate-shaped and is rotatably disposed at the annular step (5) via a rotating shaft (6). When the second filter screen (4) is in working condition, the side facing the water outlet is attached to the annular step (5) and completely cuts off the inner cavity of the housing (1). When the second filter screen (4) is not in working condition, it is tightly attached to the outer wall of the first filter screen (2) under the action of the driving structure.

3. The filtration device for gas field water treatment according to claim 2, characterized in that, The drive structure includes a torsion spring sleeved on the rotating shaft (6). One end of the torsion spring acts on the second filter screen (4), and the other end acts on the annular step (5). The torsion spring can move the second filter screen (4) from a non-working state to a working state.

4. The filtration device for gas field water treatment according to claim 1, characterized in that, The second filter screen (4) in operation has a recess (7) on the side facing the water inlet.

5. The filtration device for gas field water treatment according to claim 1, characterized in that, The side wall of the housing (1) is provided with an opening, and a cover plate (8) is detachably connected to the opening. When the second filter screen (4) is not in operation, it is located inside the cover plate (8).

6. The filtration device for gas field water treatment according to claim 1, characterized in that, The first filter screen (2) has a connecting flange (9) at one end near the water outlet, and the connecting flange (9) is detachably connected to the end of the housing (1) located at the water outlet.

7. The filtration device for gas field water treatment according to claim 1, characterized in that, The housing (1) is provided with a water inlet connector (10) at one end of the water inlet. The inner end of the water inlet connector (10) extends into the housing (1) and is positioned directly opposite the sludge collection chamber (3). The diameter of the inner hole of the water inlet connector (10) is less than or equal to the diameter of the sludge collection chamber (3).

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