CN219586050U - Decarbonization system by natural gas film method - Google Patents
Decarbonization system by natural gas film method Download PDFInfo
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- CN219586050U CN219586050U CN202320550639.1U CN202320550639U CN219586050U CN 219586050 U CN219586050 U CN 219586050U CN 202320550639 U CN202320550639 U CN 202320550639U CN 219586050 U CN219586050 U CN 219586050U
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Abstract
A natural gas film method decarbonization system relates to the technical field of natural gas decarbonization and comprises the following components in sequence: the air inlet unit is used for pouring raw material gas; the pre-membrane purification treatment unit is used for removing impurities, oil and water in the raw material gas and eliminating gas fluctuation; the heating unit is used for heating the gas, ensuring that the temperature of the raw material gas is within an ideal temperature range of the film, and adopting a heater; the membrane group unit is used for separating raw material gas; the membrane post-treatment unit is used for treating trapped gas obtained after separating raw material gas, and the trapped gas is high-purity methane; the utility model uses the pressure of the natural gas as power, does not need external power, removes the carbon dioxide in the natural gas, realizes the purpose of purifying the natural gas, and saves energy.
Description
Technical Field
The utility model relates to the technical field of natural gas decarburization, in particular to a natural gas film decarburization system.
Background
Natural gas or associated gas produced from oil and gas wells typically contains impurities and hazardous components such as water, hydrogen sulfide, carbon dioxide, and the like. Natural gas from oil and gas wells is generally purified and then used for subsequent applications, wherein natural gas decarbonization is an important link in the natural gas treatment process. The pressure ranges of natural gas produced by different wellheads are different, the pressure of the produced gas of part of wellheads can reach more than 2MPa, even after purification treatment such as dehydration, hydrocarbon removal and the like, the natural gas still has higher pressure, and the high-pressure gas is directly discharged to cause waste, thereby being unfavorable for cost saving.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a natural gas membrane decarburization system which can solve the technical problems that high-pressure natural gas is directly emptied to cause waste and is not beneficial to cost saving.
In order to achieve the above object, the present utility model provides the following technical solutions:
a decarbonization system by a natural gas film method, comprising:
the air inlet unit is used for pouring raw material gas;
the pre-membrane purification treatment unit is used for removing impurities, oil and water in the raw material gas and eliminating gas fluctuation;
the heating unit is used for heating the gas, ensuring that the temperature of the raw material gas is within an ideal temperature range of the film, and adopting a heater;
the membrane group unit is used for separating raw material gas;
the membrane post-treatment unit is used for treating trapped gas obtained after separating raw material gas, and the trapped gas is high-purity methane;
further comprises:
the manifold unit comprises a regulating valve, a safety valve, a first one-way valve, a manual ball valve and a connecting pipeline;
the control unit comprises a control cabinet, a pressure sensor, a temperature sensor and various instruments.
Preferably, the air inlet unit comprises a pressure reducing valve arranged on the pipeline, and an ejector is arranged on a bypass of the pressure reducing valve.
Preferably, the membrane pre-purification treatment unit comprises a buffer tank, a primary filter, a water removing device and a secondary filter which are sequentially connected, and the secondary filter is connected with the inlet end of the heater.
Preferably, the membrane group unit comprises a first membrane group and a second membrane group, and the first membrane group is connected with the outlet end of the heater.
Preferably, the membrane aftertreatment unit comprises an electric regulating valve, a flowmeter, a second one-way valve and an electric three-way valve which are sequentially connected, and the electric regulating valve is connected with the second membrane group.
Preferably, a purity analyzer is arranged on a pipeline between the flowmeter and the second one-way valve.
Preferably, the regulating valve is arranged on a pipeline between the raw gas inlet and the pressure reducing valve, the safety valve is arranged on a pipeline between the pressure reducing valve and the buffer tank, the first one-way valve is arranged on a pipeline between the second membrane group and the ejector, and the manual ball valve is arranged at the rear end of the electric three-way valve and used for controlling the circulation of qualified natural gas after decarburization.
Compared with the prior art, the utility model has the beneficial effects that:
1. the pressure of the natural gas is used as power, external power is not needed, carbon dioxide in the natural gas is removed, the purpose of purifying the natural gas is achieved, and energy is saved;
2. no additional auxiliary devices such as a compressor and the like are needed, the equipment is small in size and light in weight, and the hoisting and transporting are flexible;
3. the two-stage membrane group design improves the purity and recovery rate of the natural gas.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a flow chart of a decarbonization system by a natural gas film method.
Reference numerals illustrate:
1-regulating valve, 2-reducing valve, 3-ejector, 4-relief valve, 5-buffer tank, 6-primary filter, 7-water trap, 8-first check valve, 9-secondary filter, 10-heater, 11-first membrane group, 12-second membrane group, 13-electric regulating valve, 14-flowmeter, 15-purity analyzer, 16-second check valve, 17-electric three-way valve, 18-manual ball valve.
Detailed Description
The utility model will now be described in detail, by way of example, with reference to the accompanying drawings, wherein it is evident that the embodiments described are only some, but not all, of the embodiments of the utility model.
As shown in fig. 1, a decarbonization system by natural gas film method comprises the following components:
the air inlet unit is used for pouring raw material gas;
the pre-membrane purification treatment unit is used for removing impurities, oil and water in the raw material gas and eliminating gas fluctuation;
a heating unit for heating the gas to ensure that the temperature of the raw material gas is within a desired temperature range of the film, the heating unit employing a heater 10;
the membrane group unit is used for separating raw material gas;
the membrane post-treatment unit is used for treating trapped gas obtained after separating raw material gas, and the trapped gas is high-purity methane;
further comprises:
the manifold unit comprises a regulating valve 1, a safety valve 4, a first one-way valve 8, a manual ball valve 18 and a connecting pipeline;
the control unit comprises a control cabinet, a pressure sensor, a temperature sensor and various instruments.
Further, in the present embodiment, the air intake unit includes a pressure reducing valve 2 provided on a pipe, and an ejector 3 is installed on a bypass of the pressure reducing valve 2.
Further, in this embodiment, the pre-membrane purification treatment unit includes a buffer tank 5, a primary filter 6, a water removal device 7, and a secondary filter 9, which are sequentially connected, and the secondary filter 9 is connected to an inlet end of a heater 10.
Further, in this embodiment, the membrane group unit includes a first membrane group 11 and a second membrane group 12, where the first membrane group 11 is connected to the outlet end of the heater 10.
Further, in the present embodiment, the membrane post-treatment unit includes an electric control valve 13, a flow meter 14, a second one-way valve 16, and an electric three-way valve 17, which are sequentially connected, and the electric control valve 13 is connected to the second membrane group 12.
Further, in this embodiment, a purity analyzer 15 is disposed on the pipeline between the flowmeter 14 and the second check valve 16.
Further, in this embodiment, the regulating valve 1 is installed on a pipeline between the raw gas inlet and the pressure reducing valve 2, the safety valve 4 is installed on a pipeline between the pressure reducing valve 2 and the buffer tank 5, the first one-way valve 8 is installed on a pipeline between the second membrane group 12 and the ejector 3, and the manual ball valve 18 is installed at the rear end of the electric three-way valve 17 for controlling the circulation of qualified natural gas after decarbonization.
The working flow of the utility model is as follows:
the high-pressure raw material gas enters a system pipeline through a regulating valve 1, the pressure of the inlet gas is reduced to the pressure meeting the requirements of a membrane group through a pressure reducing valve 2, and the pressure reducing valve 2 has a pressure regulating and setting function; solid particles and water drops in the raw material gas can be removed through the buffer tank 5, and meanwhile, the fluctuation of the gas can be eliminated, so that the subsequent air intake stability is ensured; the impurities, oil, water and the like in the gas are further removed through the first-stage filter 6, the water is deeply removed through the water removing device 7, and the water, the oil, the impurities and the like are deeply filtered through the second-stage filter 9, so that the raw gas meets the requirement of film feeding; heating the gas by a heater 10 having a temperature setting automatic control function, ensuring that the temperature of the raw material gas is within a desired temperature range of the film; the raw material gas is separated for the first time through the first membrane group 11, the main component of the permeated gas is carbon dioxide, the permeated gas can be exhausted or collected for other use, the trapped gas is continuously separated for the second time through the second membrane group 12, and the trapped gas obtained at the moment is high-purity methane and is subjected to subsequent external conveying manifold; the content of methane in the permeation gas of the membrane group is increased, and in order to improve the recovery rate of methane, the permeation gas of the stage needs to be returned to a main gas inlet pipeline to be mixed with raw gas for being removed again.
The two processes are respectively as follows:
1) Permeation and ventilation reflux process
The permeate gas of the second membrane group 12 is connected with the suction inlet of the ejector 3 through the first one-way valve 8, the inlet pipeline of the pressure reducing valve 2 leads to the bypass pipeline and is connected with the inlet of the ejector 3, and the outlet of the ejector 3 is connected with the outlet of the pressure reducing valve 2 through the bypass pipeline. When the main pipeline has gas flow, the air permeation and backflow can be driven by the ejector 3 for reuse.
2) Product gas outlet flow
The trapped gas of the second membrane group 12 is connected with an electric regulating valve 13 through a pipeline, the exhaust flow can be regulated through the valve, the air pressure in the membrane group can be controlled, and the gas purity can be regulated within a certain range; instantaneous and cumulative flow data of the gas can be detected via the flow meter 14; the purity of the product gas can be detected by the purity analyzer 15, and if the purity of the product gas does not reach the standard, the unqualified gas is led out by the electric three-way valve 17; if the product gas is qualified, the electric three-way valve 17 is controlled to output the product gas, and the second one-way valve 16 prevents the output gas from flowing back when abnormal conditions exist. The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, shall cover the scope of the present utility model by equivalent substitution or modification according to the technical scheme of the present utility model and the application concept thereof.
Claims (7)
1. The natural gas film method decarbonization system is characterized by comprising the following components in sequence:
the air inlet unit is used for pouring raw material gas;
the pre-membrane purification treatment unit is used for removing impurities, oil and water in the raw material gas and eliminating gas fluctuation;
a heating unit for heating the gas to ensure that the temperature of the raw material gas is within a desired temperature range of the film, the heating unit employing a heater (10);
the membrane group unit is used for separating raw material gas;
the membrane post-treatment unit is used for treating trapped gas obtained after separating raw material gas, and the trapped gas is high-purity methane;
further comprises:
the manifold unit comprises a regulating valve (1), a safety valve (4), a first one-way valve (8), a manual ball valve (18) and a connecting pipeline;
the control unit comprises a control cabinet, a pressure sensor, a temperature sensor and various instruments.
2. A decarbonizing system according to claim 1, characterized in that the air inlet unit comprises a pressure reducing valve (2) arranged on the pipeline, and an ejector (3) is arranged on a bypass of the pressure reducing valve (2).
3. The decarbonization system of claim 2, wherein the pre-membrane purification treatment unit comprises a buffer tank (5), a primary filter (6), a water removal device (7) and a secondary filter (9) which are sequentially connected, wherein the secondary filter (9) is connected with the inlet end of a heater (10).
4. A natural gas film decarbonizing system according to claim 3, wherein the film group unit comprises a first film group (11) and a second film group (12), and the first film group (11) is connected with the outlet end of the heater (10).
5. The decarbonization system of claim 4, wherein the membrane aftertreatment unit comprises an electric control valve (13), a flowmeter (14), a second one-way valve (16) and an electric three-way valve (17) connected in sequence, wherein the electric control valve (13) is connected with the second membrane group (12).
6. A decarbonization system according to claim 5, characterized in that a purity analyzer (15) is provided in the line between the flowmeter (14) and the second one-way valve (16).
7. A decarbonizing system according to claim 6, characterized in that the regulating valve (1) is installed on a pipeline between the feed gas inlet and the pressure reducing valve (2), the safety valve (4) is installed on a pipeline between the pressure reducing valve (2) and the buffer tank (5), the first one-way valve (8) is installed on a pipeline between the second membrane group (12) and the ejector (3), and the manual ball valve (18) is installed at the rear end of the electric three-way valve (17) for controlling the circulation of qualified natural gas after decarbonizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320550639.1U CN219586050U (en) | 2023-03-21 | 2023-03-21 | Decarbonization system by natural gas film method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320550639.1U CN219586050U (en) | 2023-03-21 | 2023-03-21 | Decarbonization system by natural gas film method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219586050U true CN219586050U (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320550639.1U Active CN219586050U (en) | 2023-03-21 | 2023-03-21 | Decarbonization system by natural gas film method |
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| CN (1) | CN219586050U (en) |
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- 2023-03-21 CN CN202320550639.1U patent/CN219586050U/en active Active
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