Skid-mounted filtering and separating integrated device

Abstract

The invention relates to the technical field of skid-mounted filtering and separating devices, in particular to a skid-mounted filtering and separating integrated device which comprises a gravity separator, a filtering separator and a produced liquid buffer tank. The device further comprises an electric telescopic rod, the electric telescopic rod is installed at the top end of the filter separator, the output end of the gravity separator is connected with the filter separator, the output end of the filter separator is connected with a produced liquid buffer tank, the telescopic end of the electric telescopic rod is connected with a movable frame, and the movable frame is movably connected into the filter separator. A liquid distribution pipe is arranged between the movable frames, a cleaning nozzle is arranged at the rear end of the liquid distribution pipe, two groups of filter frames are arranged at the rear end in the filter separator, and filter screens are arranged in the filter frames; two-stage separation is achieved, the density difference of a gas phase, a solid phase and a liquid phase is fully utilized, the replacement frequency of a filter element can be reduced, the operation cost is reduced, solid-liquid impurities in feed gas are efficiently removed, and the influence of the feed gas on operation of a compressor is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of skid-mounted filtering and separating devices, and in particular to a skid-mounted filtering and separating integrated device. Background Art

[0002] With the continuous exploitation of conventional natural gas resources and the increasing demand for energy, shale gas, as a huge potential resource, plays an increasingly important role in the global energy structure. It is predicted that my country's unconventional natural gas geological resources are about 132×1012m3, of which shale gas resources are as high as 80.4×1012m3, ranking first in the world, with huge potential for exploitation. Due to the fracturing exploitation method, the raw gas entering the gas gathering station contains a large amount of produced liquid.

[0003] Most of the existing integrated devices directly enter the compressor, which will cause the gas compression channel to become smaller, the flow resistance to increase, and even corrode the equipment and freeze and block the pipeline. Therefore, it is necessary to build a skid-mounted filtration and separation integrated device to separate and filter the raw gas to reduce the impact of free water and impurities on the compressor. Summary of the invention

[0004] The technical solution of the present invention is: a skid-mounted integrated filtering and separation device, including a gravity separator, a filtering separator, and a produced liquid buffer tank; it also includes an electric telescopic rod, which is installed at the top of the filtering separator, the output end of the gravity separator is connected to the filtering separator, the output end of the filtering separator is connected to the produced liquid buffer tank, the telescopic end of the electric telescopic rod is connected to a movable frame, and the movable frame is movably connected to the inside of the filtering separator, liquid distribution pipes are arranged between the movable frames, a cleaning nozzle is arranged at the rear end of the liquid distribution pipe, two groups of filtering frames are arranged at the rear end of the filtering separator, and a filter net is arranged inside the filtering frame.

[0005] Preferably, the electric telescopic rod is started to push the movable frame downward, so that the cleaning nozzle sprays and cleans the filter screen to prevent dust from accumulating on the filter screen, causing the filter screen to be blocked and affecting the filtering effect.

[0006] Preferably, a mounting plate is installed in the middle position inside the filter separator, an air guide tube is symmetrically arranged at the front end center of the mounting plate, an outer tube is arranged at the front end of the air guide tube, and a filter core is arranged inside the outer tube.

[0007] Preferably, a liquid collecting pipe is installed below the filter separator, a liquid level gauge tube is relatively installed on the liquid collecting pipe via a support rod, and an air inlet pipe is arranged at the middle position of the top of the gravity separator.

[0008] Preferably, support frames are installed on both the left and right sides of the bottom end of the gravity separator, and the liquid collecting pipe is arranged at the top of the support frame.

[0009] Preferably, the gravity separator includes an air inlet switch ball valve 1, which is installed at the output end of the gravity separator and the produced liquid buffer tank. The output ends of the gravity separator, filter separator and produced liquid buffer tank are all connected to a vent ball valve 1, and a vent safety valve is installed at the output end of the vent ball valve 1.

[0010] Preferably, the output end of the vent safety valve is connected to vent ball valve 2, the output end of vent ball valve 2 is connected to a throttling stop vent valve, and the input end of the throttling stop vent valve is connected to the filter separator and the produced liquid buffer tank, the output end of the throttling stop vent valve on the gravity separator is connected to vent ball valve 3, and the input end of vent ball valve 3 is connected to the input end of the gravity separator.

[0011] Preferably, an air intake switch ball valve 2 is connected between the gravity separator and the filter separator, and the input end of the air intake switch ball valve 2 is connected to the output end of the gravity separator, and the output end of the air intake switch ball valve 2 is connected to the input end of the filter separator.

[0012] Preferably, pressure displays and remote transmission instruments are installed relatively on the gravity separator, filter separator and produced liquid buffer tank, the pressure display and remote transmission instrument are installed between the temperature display and remote transmission instrument, and the temperature display and remote transmission instrument are installed on the gravity separator, filter separator and produced liquid buffer tank, liquid level displays and remote transmission instruments are connected between the gravity separator, filter separator and sewage pipe, the output end of the vent ball valve three on the filter separator is connected to the orifice flowmeter, and the output end of the vent safety valve on the produced liquid buffer tank is connected to the electromagnetic flowmeter.

[0013] The beneficial effects of the present invention are as follows: the integrated device has two-stage separation and makes full use of the density difference between the gas phase, solid phase and liquid phase, which can reduce the frequency of filter element replacement, reduce operating costs, efficiently remove solid and liquid impurities in the raw gas, and reduce the impact of the raw gas on the operation of the compressor; by setting a produced liquid buffer tank, the condensate gas in the sewage can be flashed out, the pressure of the produced water tank can be reduced, and the safety of equipment and personnel in the station can be ensured; by setting a drain valve, the liquid level difference in the tank can be fully utilized to realize automatic and continuous liquid inlet and outlet of sewage; the device can be skid-mounted and integrated, with small maintenance workload, convenient management, simple operation, low investment, and can be reused, thereby improving the efficiency of shale gas extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of a flow chart of a skid-mounted integrated filtering and separation device of the present invention; Figure 2 Shown is a schematic diagram of the connection of the skid-mounted integrated filtering and separation device system of the present invention; Figure 3The first three-dimensional structure schematic diagram of the skid-mounted integrated filtering and separation device filtering and separating device of the present invention is shown; Figure 4 The first three-dimensional structural schematic diagram of the cross section of the skid-mounted integrated filtering and separation device of the present invention is shown; Figure 5 The second three-dimensional structure schematic diagram of the skid-mounted filter-separation integrated device filter separator of the present invention is shown; Figure 6 The second stereoscopic structural schematic diagram of the cross section of the skid-mounted integrated filtering and separation device of the present invention is shown; Figure 7 Shown is a schematic diagram of the second three-dimensional structure inside the air duct of the filter separator of the skid-mounted integrated filtering and separation device of the present invention.

[0015] Description of reference numerals: 1. Gravity separator; 101. Air intake switch ball valve 1; 102. Vent ball valve 1; 103. Vent safety valve; 104. Vent ball valve 2; 105. Throttle cut-off vent valve; 106. Vent ball valve 3; 107. Air intake switch ball valve 2; 2. Filter separator; 201. Electric telescopic rod; 202. Movable frame; 203. Liquid distribution pipe; 204. Cleaning nozzle; 205. Filter frame; 206. Filter screen; 207. Mounting plate; 208. Air duct; 209. Outer tube; 210. Filter element; 211. Liquid collecting pipe; 212. Liquid level gauge tube; 213. Air inlet pipe; 214. Support frame; 3. Produced liquid buffer tank; 301. Pressure display and remote transmission instrument; 302. Temperature display and remote transmission instrument; 303. Liquid level display and remote transmission instrument; 304. Orifice flowmeter; 305. Electromagnetic flowmeter. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] See also Figure 1 - Figure 7 The present invention provides an embodiment: a skid-mounted integrated filtering and separation device, comprising a gravity separator 1, a filtering separator 2, and a produced liquid buffer tank 3; further comprising an electric telescopic rod 201, the electric telescopic rod 201 being installed at the top of the filtering separator 2, the output end of the gravity separator 1 being connected to the filtering separator 2, the output end of the filtering separator 2 being connected to the produced liquid buffer tank 3, the telescopic end of the electric telescopic rod 201 being connected to a movable frame 202, and the movable frame 202 being movably connected to the inside of the filtering separator 2, a liquid distribution pipe 203 being arranged between the movable frames 202, a cleaning nozzle 204 being arranged at the rear end of the liquid distribution pipe 203, two sets of filtering frames 205 being arranged at the rear end inside the filtering separator 2, and a filter screen 206 being arranged inside the filtering frame 205.

[0018] See also Figure 3 - Figure 7 In this embodiment, a mounting plate 207 is installed in the middle position inside the filter separator 2, and an air guide pipe 208 is symmetrically arranged at the center of the front end of the mounting plate 207. An outer tube 209 is arranged at the front end of the air guide pipe 208, and a filter element 210 is arranged inside the outer tube 209; a liquid collecting pipe 211 is installed below the filter separator 2, and a liquid level meter pipe 212 is relatively installed on the liquid collecting pipe 211 through a support rod, and an air inlet pipe 213 is arranged in the middle position of the top of the gravity separator 1; the gravity separator Support frames 214 are installed on both sides of the bottom of the device 1, and the liquid collecting pipe 211 is set at the top of the support frame 214. The separated gas passes through the air inlet switch ball valve 107 and enters the filter element 210 in the air guide pipe 208 for filtration and separation. After the production liquid is filtered, it is filtered again through the filter mesh 206 to further remove dust below 5μm and droplets below 10μm. The filtered raw gas does not contain the production liquid and is measured by the orifice flowmeter 304 before entering the compressor area for pressurized transmission.

[0019] See also Figure 2 In this embodiment, the gravity separator 1 includes an air inlet switch ball valve 101, which is installed at the output end of the gravity separator 1 and the produced liquid buffer tank 3. The output ends of the gravity separator 1, the filter separator 2 and the produced liquid buffer tank 3 are all connected with a vent ball valve 102, and the output end of the vent ball valve 102 is installed with a vent safety valve 103; the output end of the vent safety valve 103 is connected with a vent ball valve 2 104, and the output end of the vent ball valve 2 104 is connected with a throttling stop vent valve 105, and the input end of the throttling stop vent valve 105 is connected to the filter separator 2 and the produced liquid buffer tank 3, the output end of the throttling stop vent valve 105 on the gravity separator 1 is connected with a vent ball valve 3 106, and the input end of the vent ball valve 3 106 is connected to the input end of the gravity separator 1; between the gravity separator 1 and the filter separator 2 An air intake switch ball valve 107 is connected, and the input end of the air intake switch ball valve 107 is connected to the output end of the gravity separator 1, and the output end of the air intake switch ball valve 107 is connected to the input end of the filter separator 2; the gravity separator 1, the filter separator 2 and the produced liquid buffer tank 3 are relatively installed with pressure display and remote transmission instruments 301, the pressure display and remote transmission instrument 301 is installed between the temperature display and remote transmission instrument 302, and the temperature display and remote transmission instrument 302 is installed on the gravity separator 1, the filter separator 2 and the produced liquid buffer tank 3, the gravity separator 1, the filter separator 2 and the sewage pipe are connected with liquid level display and remote transmission instruments 303, the output end of the vent ball valve 106 on the filter separator 2 is connected to the orifice flowmeter 304, and the output end of the vent safety valve 103 on the produced liquid buffer tank 3 is connected to the electromagnetic flowmeter 305.

[0020] During operation, the raw gas containing produced liquid first passes through the air inlet switch ball valve 101 to enter the separation chamber of the gravity separator 1, and a wire mesh mist replenisher is arranged inside for gravity separation. Due to the different densities of the gas phase, solid phase and liquid phase, the solid phase with high density above 5μm and the liquid phase above 10μm gather at the lower part of the tank under the action of gravity, and the separated gas passes through the air inlet switch ball valve 107 to enter the filter element 210 in the air guide pipe 208 for filtration and separation. After the produced liquid is filtered, it is filtered again through the filter screen 206 to further remove dust below 5μm and droplets below 10μm. The raw gas without produced liquid is measured by the orifice flowmeter 304 and then enters the compressor area for pressurized transmission. After the filtration is completed, the electric telescopic rod 201 is started to push the movable frame 202 downward, so that the cleaning nozzle 204 sprays and cleans the filter screen 206 to avoid dust accumulation on the filter screen 206, causing the filter screen 206 to be blocked and affecting the filtration effect. The sewage outlet of the gravity separator 1 and the filter separator 2 is connected to the inlet of the produced liquid buffer tank 3, and the liquid after flash evaporation enters the produced water tank for external transportation. All the venting pipelines on the device are connected to the venting main pipe and sent to the venting flare.

[0021] Through the above steps, the integrated device has two-stage separation, making full use of the density difference between the gas phase, solid phase and liquid phase, which can reduce the frequency of filter element replacement, reduce operating costs, efficiently remove solid and liquid impurities in the raw gas, and reduce the impact of the raw gas on the operation of the compressor; so as to solve the problems of smaller gas compression channels, increased flow resistance, and even corrosion of equipment and freezing and blockage of pipelines.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A skid-mounted integrated filtering and separation device, comprising a gravity separator (1), a filtering separator (2), and a produced liquid buffer tank (3); characterized in that: It also comprises an electric telescopic rod (201), the electric telescopic rod (201) being mounted on the top end of the filter separator (2), the output end of the gravity separator (1) being connected to the filter separator (2), the output end of the filter separator (2) being connected to a produced liquid buffer tank (3), the telescopic end of the electric telescopic rod (201) being connected to a movable frame (202), and the movable frame (202) being movably connected to the inside of the filter separator (2), a liquid distribution pipe (203) being arranged between the movable frames (202), a cleaning nozzle (204) being arranged at the rear end of the liquid distribution pipe (203), two groups of filter frames (205) being arranged at the rear end inside the filter separator (2), and a filter screen (206) being arranged inside the filter frame (205).

2. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: A mounting plate (207) is installed at a middle position inside the filter separator (2), an air guide tube (208) is symmetrically arranged at the center of the front end of the mounting plate (207), an outer tube (209) is arranged at the front end of the air guide tube (208), and a filter core (210) is arranged inside the outer tube (209).

3. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: A liquid collecting pipe (211) is installed below the filter separator (2), a liquid level gauge pipe (212) is installed on the liquid collecting pipe (211) via a support rod, and an air inlet pipe (213) is arranged at the middle position of the top end of the gravity separator (1).

4. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: Support frames (214) are installed on both left and right sides of the bottom end of the gravity separator (1), and the liquid collecting pipe (211) is arranged on the top end of the support frame (214).

5. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: The gravity separator (1) comprises an air inlet switch ball valve (101), which is installed at the output ends of the gravity separator (1) and the produced liquid buffer tank (3). The output ends of the gravity separator (1), the filter separator (2) and the produced liquid buffer tank (3) are all connected to a vent ball valve (102), and the output end of the vent ball valve (102) is installed with a vent safety valve (103).

6. The skid-mounted integrated filtering and separation device according to claim 5, characterized in that: The output end of the vent safety valve (103) is connected to a vent ball valve 2 (104), the output end of the vent ball valve 2 (104) is connected to a throttling stop vent valve (105), and the input end of the throttling stop vent valve (105) is connected to the filter separator (2) and the produced liquid buffer tank (3), the output end of the throttling stop vent valve (105) on the gravity separator (1) is connected to a vent ball valve 3 (106), and the input end of the vent ball valve 3 (106) is connected to the input end of the gravity separator (1).

7. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: An air intake switch ball valve 2 (107) is connected between the gravity separator (1) and the filter separator (2), and the input end of the air intake switch ball valve 2 (107) is connected to the output end of the gravity separator (1), and the output end of the air intake switch ball valve 2 (107) is connected to the input end of the filter separator (2).

8. The skid-mounted filtration and separation integrated device according to claim 1, characterized in that: Pressure display and remote transmission instruments (301) are installed on the gravity separator (1), the filter separator (2) and the produced liquid buffer tank (3) in a relative manner. The pressure display and remote transmission instrument (301) is installed between the temperature display and remote transmission instrument (302), and the temperature display and remote transmission instrument (302) is installed on the gravity separator (1), the filter separator (2) and the produced liquid buffer tank (3). Liquid level display and remote transmission instruments (303) are connected between the gravity separator (1), the filter separator (2) and the sewage pipe. The output end of the vent ball valve (106) on the filter separator (2) is connected to an orifice flowmeter (304), and the output end of the vent safety valve (103) on the produced liquid buffer tank (3) is connected to an electromagnetic flowmeter (305).

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