Emptying natural gas recovery system with adsorption type tank container

Abstract

The utility model relates to the technical field of new energy, and discloses an emptying natural gas recovery system with an adsorption type tank box, which comprises a three-phase separator, a precision filter, a pressure stabilizing device, a dehydration device, a flow regulating valve, a flow meter, a stop valve, a high-pressure hose, a quick plug, a quick valve seat, a controller and the adsorption type tank box, the three-phase separator, the precision filter, the pressure stabilizing device, the dehydration device, the flow regulating valve, the flow meter, the stop valve, the high-pressure hose, the quick-connection plug, the quick-connection valve seat, the controller and the adsorption type tank box are connected in sequence; compared with the prior art, the recovery device has the advantages that the recovery problem of vented natural gas in different occasions can be effectively solved, energy is saved, and environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a vented natural gas recovery system with an adsorption tank box. Background Art

[0002] Natural gas venting usually occurs during the initial gas testing of natural gas wells and the maintenance of natural gas processing plants. The vented natural gas is usually treated by flaring, which not only wastes a lot of energy, but also greatly pollutes the environment.

[0003] In order to solve the energy waste and environmental pollution problems of venting natural gas, a venting natural gas recovery system with an adsorption tank is proposed. The adsorption tank adopts the principle of physical adsorption. A high specific surface area natural gas special adsorbent is loaded into the storage tank. Its huge internal surface area and rich microporous structure are used to adsorb and store natural gas at room temperature and medium pressure. Its biggest advantage is that it can obtain a storage energy density close to that of CNG (compressed natural gas) under high pressure (20MPa) at low pressure (3.5-6.0MPa), which can be directly used in industrial cutting and welding fuel and civil gas fuel. The recovery system with an adsorption tank can be applied to venting natural gas in different occasions, and can ensure the maximum recovery efficiency of venting natural gas. The adsorption natural gas tank and recovery system have the advantages of high recovery efficiency, strong applicability, high storage and transportation safety factor and wide application range. It can effectively solve the recovery problem of venting natural gas. It not only saves energy, but also reduces environmental pollution, and has certain economic and social significance. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a vented natural gas recovery system with an adsorption tank box.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vented natural gas recovery system with an adsorption tank container, including a three-phase separator, a precision filter, a pressure stabilizing device, a dehydration device, a flow regulating valve, a flow meter, a shut-off valve, a high-pressure hose, a quick-connect plug, a quick-connect valve seat, a controller and an adsorption tank container.

[0006] As a further description of the above technical solution:

[0007] The pressure stabilizing device stabilizes the pressure of the system, and includes a first channel and a second channel, wherein the first channel and the second channel are both connected by a pipeline and are arranged between a precision filter and a dehydration device; the first channel includes a control valve A, a compressor unit and a control valve B, and the control valve A, the compressor unit and the control valve B are connected in sequence; the second channel includes a control valve C, a pressure reducing valve group and a control valve D, and the control valve C, the pressure reducing valve group and the control valve D are connected in sequence; the control valve A and the control valve C are respectively connected to the precision filter, and the control valve B and the control valve D are respectively connected to the dehydration device.

[0008] As a further description of the above technical solution:

[0009] The adsorption tank container absorbs and releases natural gas, including a fixed frame, a tank body, an adsorbent, a filter, a safety valve, a pressure gauge and a stop valve. The tank body is connected to the inside of the fixed frame, and the adsorbent is connected to the inside of the tank body. The adsorbent is an activated carbon with a multi-microporous structure. The specific surface area of ​​the adsorbent is greater than 3000m2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%. The filter is welded on the inner wall of the tank body. The filter is composed of a layer of metal perforated plate, three layers of stainless steel wire mesh and a layer of metal perforated plate, which mainly intercepts adsorbent solid particles, and the safety valve, pressure gauge and stop valve are respectively connected to the outside of the tank body.

[0010] As a further description of the above technical solution:

[0011] The three-phase separator adopts the mechanical separation principle to roughly separate solid particles, water and light oil in natural gas. The internal structure of the three-phase separator is blade type or wire mesh type.

[0012] As a further description of the above technical solution:

[0013] The precision filter uses the interception and condensation separation principle to precisely separate particles, water and light oil in natural gas, and its internal structure is a filter element type.

[0014] As a further description of the above technical solution:

[0015] The dehydration device removes moisture from the vented natural gas. The dehydration device adopts a double-tower structure. The dehydration device includes a tower A and a tower B. The dehydration device operates in a cyclic mode of tower A adsorption-tower B regeneration-tower B adsorption-tower A regeneration.

[0016] In the implementation scheme of the utility model, the vented natural gas enters the three-phase separator, and the solid particles, water and light oil in the natural gas are roughly separated by the mechanical separation principle. The roughly purified natural gas enters the precision filter, and the particles, water and light oil in the natural gas are precisely separated by the interception and condensation separation principle. The purified natural gas enters the pressure stabilizing device for pressure stabilization. When the pressure of the vented natural gas is lower than the rated adsorption pressure, the compressor unit starts to compress the vented natural gas and increase the system pressure to the rated adsorption pressure; when the pressure of the vented natural gas is higher than the rated adsorption pressure, the system pressure is reduced to the rated adsorption pressure by the pressure reducing valve group. The natural gas after passing through the pressure stabilizing device enters the dehydration device. The double towers of the dehydration device remove the tiny water droplets and free water in the natural gas to less than 1ppm through the cyclic working mode of tower A adsorption-tower B regeneration-tower B adsorption-tower A regeneration. The natural gas after supercharging or decompression and purification enters the flow control valve and flow meter to automatically adjust the rated adsorption flow of the adsorption tank. The natural gas enters the adsorption tank through the cut-off valve, high-pressure hose, quick-connect plug and quick-connect valve seat, and the adsorbent adsorbs the natural gas. The controller collects the inlet and outlet pressure signals of the pressure stabilizing device, the working pressure signal inside the adsorption tank container, and the flow signal of the flow meter through the pressure sensor, and processes the signals, and sends the control signal to the pressure stabilizing device, the flow control valve and the cut-off valve to stabilize the working pressure of the system and the adsorption flow of the adsorption tank container. When the adsorption flow of the adsorption tank container reaches the rated adsorption reserve, the cut-off valve is closed and the pressure stabilizing device stops running.

[0017] The utility model has the following beneficial effects:

[0018] In the utility model, the adsorption tank container uses polymer materials as adsorbents to adsorb the vented natural gas after being stabilized by the pressure stabilization system and dehydrated and purified by the dehydration system, ensuring that the vented natural gas recovery system with the adsorption tank container has the advantages of high recovery efficiency, strong applicability, high storage and transportation safety factor and wide application range, and can effectively solve the problem of vented natural gas recovery. This novel design not only saves energy, but also reduces environmental pollution, and has certain economic and social significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a vented natural gas recovery system with an adsorption tank container.

[0020] Legend:

[0021] 01. Three-phase separator; 02. Precision filter; 03. Voltage stabilizer; 0301. Control valve A; 0302. Compressor unit; 0303. Control valve B; 0304. Control valve C; 0305. Pressure reducing valve group; 0306. Control valve D; 04. Dehydration device; 05. Flow regulating valve; 06. Flow meter; 07. Shut-off valve; 08. High-pressure hose; 09. Quick-connect plug; 10. Quick-connect valve seat; 11. Controller; 12. Adsorption tank container; 1201. Fixed frame; 1202. Tank body; 1203. Adsorbent; 1204. Filter; 1205. Safety valve; 1206. Pressure gauge; 1207. Shut-off valve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 The utility model provides an embodiment: a vented natural gas recovery system with an adsorption tank box, comprising a three-phase separator 01, a precision filter 02, a pressure stabilizing device 03, a dehydration device 04, a flow regulating valve 05, a flow meter 06, a cut-off valve 07, a high-pressure hose 08, a quick-connect plug 09, a quick-connect valve seat 10, a controller 11 and an adsorption tank box 12, wherein the three-phase separator 01, the precision filter 02, the pressure stabilizing device 03, the dehydration device 04, the flow regulating valve 05, the flow meter 06, the cut-off valve 07, the high-pressure hose 08, the quick-connect plug 09, the quick-connect valve seat 10 and the adsorption tank box 12 are connected in sequence, and the precision filter 02, the pressure stabilizing device 03, the dehydration device 04, the flow regulating valve 05, the flow meter 06 and the cut-off valve 07 are all electrically connected to the controller 11, and the quick-connect plug 09 and the quick-connect valve seat 10 are electrically connected.

[0024] In order to stabilize the pressure of the system, the pressure stabilizing device 03 provided in this solution includes a first channel and a second channel, and the first channel and the second channel are both connected by a pipeline and arranged between the precision filter 02 and the dehydration device 04;

[0025] The first channel includes a control valve A0301, a compressor unit 0302 and a control valve B0303, and the control valve A0301, the compressor unit 0302 and the control valve B0303 are connected in sequence;

[0026] The second channel includes a control valve C0304, a pressure reducing valve group 0305 and a control valve D0306, and the control valve C0304, the pressure reducing valve group 0305 and the control valve D0306 are connected in sequence;

[0027] The control valve A0301 and the control valve C0304 are connected to the precision filter 02 respectively, and the control valve B0303 and the control valve D0306 are connected to the dehydration device 04 respectively.

[0028] In order to adsorb and discharge natural gas, the adsorption tank box 12 provided in this scheme includes a fixed frame 1201, a tank body 1202, an adsorbent 1203, a filter screen 1204, a safety valve 1205, a pressure gauge 1206 and a stop valve 1207. The tank body 1202 is connected to the inside of the fixed frame 1201, the adsorbent 1203 is connected to the inside of the tank body 1202, the filter screen 1204 is welded to the inner wall of the tank body 1202, and the safety valve 1205, the pressure gauge 1206 and the stop valve 120 are respectively connected to the outside of the tank body 1202.

[0029] The adsorbent (1203) is an activated carbon with a microporous structure. The specific surface area of ​​the adsorbent 1203 is greater than 3000m2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%.

[0030] The filter screen 1204 is composed of a layer of metal perforated plate, three layers of stainless steel wire mesh and a layer of metal perforated plate, and is mainly used to intercept solid particles of the adsorbent 1203 .

[0031] The three-phase separator 01 adopts the mechanical separation principle to roughly separate solid particles, water and light oil in natural gas. The internal structure of the three-phase separator 01 is blade type or wire mesh type.

[0032] The precision filter 02 uses the interception and condensation separation principle to precisely separate particles, water and light oil in natural gas, and its internal structure is a filter element type.

[0033] The dehydration device 04 removes moisture from the vented natural gas. The dehydration device 04 adopts a double-tower structure. The dehydration device 04 includes a tower A and a tower B. The dehydration device 04 operates in a cyclic mode of tower A adsorption-tower B regeneration-tower B adsorption-tower A regeneration.

[0034] The safety valve 1205 has an overpressure release function to ensure the safety of the tank.

[0035] The pressure gauge 1206 displays the working pressure inside the adsorption tank 12 .

[0036] The stop valve 1207 has the functions of inflation, deflation and closing.

[0037] The various components designed in this solution can be purchased on the market.

[0038] Working principle: The vented natural gas enters the three-phase separator 01, and the solid particles, water and light oil in the natural gas are roughly separated by the mechanical separation principle. The roughly purified natural gas enters the precision filter 02, and the particles, water and light oil in the natural gas are precisely separated by the interception and condensation separation principle. The purified natural gas enters the pressure stabilizing device 03 for pressure stabilization. When the pressure of the vented natural gas is lower than the rated adsorption pressure, the compressor unit 0302 starts to compress the vented natural gas and increase the system pressure to the rated adsorption pressure; when the pressure of the vented natural gas is higher than the rated adsorption pressure, the system pressure is reduced to the rated adsorption pressure of the adsorption tank through the pressure reducing valve group 0305. The natural gas after passing through the pressure stabilizing device 03 enters the dehydration device 04. The double towers of the dehydration device 04 remove the tiny water droplets and free water in the natural gas to less than 1ppm through the cyclic working mode of tower A adsorption-tower B regeneration-tower B adsorption-tower A regeneration. The natural gas after pressurization or decompression and purification enters the flow control valve 05 and the flow meter 06 to automatically adjust the rated adsorption flow of the vented natural gas. Natural gas enters the adsorption tank 12 through the cut-off valve 07, high-pressure hose 08, quick-connect plug 09 and quick-connect valve seat 10, and the adsorbent 1203 adsorbs the natural gas. The controller 11 collects the inlet and outlet pressure signals of the pressure stabilizing device 03, the working pressure signal inside the adsorption tank 12 and the flow signal of the flow meter 06 through the external pressure sensor, and performs calculation processing on the signals, and sends the control signal to the control valve A0301, the compressor unit 0302, the control valve B0303, the control valve C0304, the pressure reducing valve group 0305, the control valve D0306, the flow control valve 05 and the cut-off valve 07 to stabilize the working pressure of the system and the adsorption flow of the adsorption tank 12. When the adsorption flow of the adsorption tank 12 reaches the rated adsorption reserve, the cut-off valve 07 is closed and the pressure stabilizing device 03 stops running.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vented natural gas recovery system with an adsorption tank container, comprising a controller (11), characterized in that: It also includes a three-phase separator (01), a precision filter (02), a pressure stabilizing device (03), a dehydrating device (04), a flow regulating valve (05), a flow meter (06), a shut-off valve (07), a high-pressure hose (08), a quick-connect plug (09), a quick-connect valve seat (10) and an adsorption tank box (12). The three-phase separator (01), the precision filter (02), the pressure stabilizing device (03), the dehydrating device (04), the flow regulating valve (05), the flow meter (06), the shut-off valve (07), the high-pressure hose (08), the quick-connect plug (09), the quick-connect valve seat (10) and the adsorption tank box (12) are connected in sequence, and the precision filter (02), the pressure stabilizing device (03), the dehydrating device (04), the flow regulating valve (05), the flow meter (06) and the shut-off valve (07) are all electrically connected to a controller (11).

2. A vented natural gas recovery system with an adsorption tank container according to claim 1, characterized in that: The pressure stabilizing device (03) stabilizes the pressure of the system, and the pressure stabilizing device (03) comprises a first channel and a second channel, wherein the first channel and the second channel are both connected by a pipeline and arranged between the precision filter (02) and the dehydration device (04).

3. A vented natural gas recovery system with an adsorption tank container according to claim 2, characterized in that: The first channel includes a control valve A (0301), a compressor group (0302) and a control valve B (0303), and the control valve A (0301), the compressor group (0302) and the control valve B (0303) are connected in sequence. The second channel includes a control valve C (0304), a pressure reducing valve group (0305) and a control valve D (0306), and the control valve C (0304), the pressure reducing valve group (0305) and the control valve D (0306) are connected in sequence. The control valve A (0301) and the control valve C (0304) are respectively connected to the precision filter (02), and the control valve B (0303) and the control valve D (0306) are respectively connected to the dehydration device (04).

4. The vented natural gas recovery system with an adsorption tank container according to claim 1, characterized in that: The adsorption tank container (12) adsorbs and releases natural gas, and the adsorption tank container (12) comprises a fixed frame (1201), a tank body (1202), an adsorbent (1203), a filter (1204), a safety valve (1205), a pressure gauge (1206) and a stop valve (1207). The tank body (1202) is connected to the inside of the fixed frame (1201), the adsorbent (1203) is connected to the inside of the tank body (1202), the filter (1204) is welded to the inner wall of the tank body (1202), and the safety valve (1205), the pressure gauge (1206) and the stop valve (1207) are respectively connected to the outside of the tank body (1202).

5. A vented natural gas recovery system with an adsorption tank container according to claim 4, characterized in that: The adsorbent (1203) is an activated carbon with a microporous structure. The specific surface area of ​​the adsorbent (1203) is greater than 3000m2 / g, the micropore diameter is 1-2 nanometers, and the pore volume ratio is greater than 85%.

6. The vented natural gas recovery system with an adsorption tank container according to claim 4, characterized in that: The filter screen (1204) is composed of a layer of metal perforated plate, three layers of stainless steel wire mesh and a layer of metal perforated plate, and is mainly used to intercept solid particles of the adsorbent (1203).

7. The vented natural gas recovery system with an adsorption tank container according to claim 1, characterized in that: The three-phase separator (01) uses the mechanical separation principle to roughly separate solid particles, water and light oil in natural gas. The internal structure of the three-phase separator (01) is a blade type or a wire mesh type.

8. The vented natural gas recovery system with an adsorption tank container according to claim 1, characterized in that: The precision filter (02) uses the interception and condensation separation principle to precisely separate particles, water and light oil in natural gas, and its internal structure is a filter element type.

9. The vented natural gas recovery system with an adsorption tank container according to claim 1, characterized in that: The dehydration device (04) removes moisture from the vented natural gas. The dehydration device (04) adopts a double-tower structure. The dehydration device (04) includes a tower A and a tower B. The upper ends of the towers A and B are connected by a pipeline. The lower ends of the towers A and B are connected by a pipeline. The upper end clearance pipelines of the towers A and B are connected to a flow regulating valve (05). The lower ends of the towers A and B are connected to a pressure stabilizing device (03) through a pipeline.

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