CN217173635U

CN217173635U - Well head gas recovery and purification device

Info

Publication number: CN217173635U
Application number: CN202122895937.8U
Authority: CN
Inventors: 郗春满; 陆璐; 郭正军; 卞华君; 熊大平
Original assignee: Suzhou Sujing Protective Atmosphere Co ltd
Current assignee: Suzhou Sujing Protective Atmosphere Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-08-12
Anticipated expiration: 2031-11-24

Abstract

The utility model relates to a well head gas recovery and purification device, which comprises a purification module capable of recovering and purifying well head gas and a separation module capable of separating and purifying well head gas, wherein the recovery and purification device has three states, and when the recovery and purification device is in a first state, the purification module is communicated with a well head gas outlet pipe so as to recover and purify the well head gas; when the well head gas separation module is in the second state, the separation module is communicated with a well head gas outlet pipe so as to separate and purify the well head gas; when the well head gas recovery device is in the third state, the purification module is respectively communicated with the separation module and the gas outlet pipe of the well head gas so as to recover, remove impurities, separate and purify the well head gas. The utility model provides a retrieve purification device simple structure and have a plurality of operating condition, can satisfy the recovery demand of well head gas under the different conditions, be applicable to different work occasions.

Description

Well head gas recovery and purification device

Technical Field

The utility model relates to a retrieve purification device, concretely relates to well head gas retrieves purification device.

Background

The well head gas is known as natural gas, and the components of the well head gas vary from place to place. The content of hydrocarbon methane, ethane, butane, pentane and other substances in the well head gas is maximum, wherein the methane accounts for about 90 percent; and carbon dioxide, carbon monoxide, sulfur compounds, and the like. At present, the treatment of well head gas is generally discharged into the atmosphere, and the well head gas entering the air can harm human health and pollute the environment. In addition, the discharge of well head gas also causes waste of resources. If the well head gas is recycled and purified to reach the usable standard, the environmental protection and the economical efficiency of well head gas resources can be improved.

The existing recovery and purification device occupies a large area, mostly is parts, needs to be installed on site, occupies a large construction area, is easy to be influenced by weather changes during construction, and has a long installation period. The natural gas well mouths are generally distributed on mines and sea surfaces, and the existing recovery and purification device is extremely inconvenient to transport and difficult to construct and is not suitable for recovering well mouth gas. In addition, because the existing recovery and purification device is designed for certain specific places, the device is often single in function, cannot meet the use requirements of different occasions, and is low in equipment utilization rate.

Therefore, it is urgent to provide a wellhead gas recovery device which has a simple structure, is multifunctional and is convenient to install and use.

Disclosure of Invention

The utility model aims to solve the technical problem that a equipment structure is simple and multi-functional well head gas recovery unit is provided.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model discloses a first aspect provides a retrieve purifier, retrieve purifier including can retrieve the purification module of edulcoration to well head gas and can separate the separation module of purification to the well head gas, retrieve purifier and have three states, when being in first state, purification module is linked together with the outlet duct of well head gas in order to retrieve the edulcoration to the well head gas; when the well head gas separation module is in a second state, the separation module is communicated with a gas outlet pipe of the well head gas so as to separate and purify the well head gas; when the well head gas recovery device is in a third state, the purification module is respectively communicated with the separation module and the well head gas outlet pipe so as to recover, remove impurities, separate and purify the well head gas.

The recovery purification device in this application has a plurality of states, can satisfy the recovery demand of well head gas under the different conditions. When the purity of the wellhead gas to be treated reaches more than 95%, the recovery and purification device is preferably in the second state to treat the wellhead gas; when the purity of the wellhead gas to be treated is more than 90% and less than 95%, the recovery and purification device is in the first state or the third state to treat the wellhead gas, and in order to obtain the treated wellhead gas with higher purity, the recovery and purification device is preferably in the third state to treat the wellhead gas.

Preferably, the recovery and purification device further comprises a first mounting seat and a second mounting seat.

Further preferably, the purification module is arranged on the first installation seat, and the length of the first installation seat is 380-400 cm, and the width of the first installation seat is 100-120 cm.

Further preferably, the separation module is arranged on the second mounting seat, the length of the second mounting seat is 450-500 cm, and the width of the second mounting seat is 90-100 cm.

Through installing purification module and separation module respectively on first mount pad and second mount pad, convenient transportation during the in-service use, only need carry out simple debugging and installation and can use, improved the installation effectiveness, be applicable to extreme occasions such as mine, sea.

Preferably, the purification module comprises a steam-water separation system capable of performing steam-water separation on the wellhead gas, a filtering system capable of filtering the wellhead gas and a heating system capable of heating the wellhead gas, the purification module has two working states, and when the purification module is in the working state A, the steam-water separation system, the filtering system and the heating system are sequentially communicated to perform steam-water separation, filtering and heating on the wellhead gas; when the purification module is in a working state B, the steam-water separation system is communicated with the heating system to perform steam-water separation and heating on the wellhead gas; when the recovery and purification device is in a first state, the purification module can only be in an A working state; when the recovery and purification device is in the third state, the purification module can be switched between two working states.

The well head gas impurity content of different natural gas well heads is different, and some well head gas impurity content is many, and some well head gas impurity content is few, and this application makes purification module have two kinds of operating condition through the setting to purification module, can filter or not filter well head gas according to the demand, when guaranteeing to satisfy the requirement to the recovery purification of well head gas, has prolonged purification module's life.

Further preferably, the purification module further comprises an air inlet pipe which can be connected with the outlet pipe of the wellhead gas, the air inlet pipe comprises an air inlet pipe body, a first valve which is arranged on the air inlet pipe body and can be opened or closed, and a first pressure valve assembly which can adjust pressure, the air inlet pipe is connected with an inlet of the steam-water separation system, an outlet of the steam-water separation system is communicated with an inlet of the filtering system through a first pipeline, the first pipeline comprises a first pipeline 15 body and a second valve which is arranged on the first pipeline main body and can be opened or closed, an outlet of the filtering system is communicated with an inlet of the heating system through a second pipeline, the second pipeline comprises a second pipeline body and a third valve which is arranged on the second pipeline body and can be opened or closed, the outlet of the steam-water separation system is communicated with the inlet of the heating system through a third pipeline, and the third pipeline comprises a third pipeline body, a fourth valve and a second pressure valve assembly, wherein the fourth valve and the second pressure valve assembly are respectively arranged on the third pipeline body and can be opened or closed.

Further preferably, the filtering system comprises a plurality of filters connected in series, the filtering precision of the filters is 0.01-1 μm, and the filtering precision of the filters is improved or kept unchanged along the transmission direction of the well head gas.

According to some preferred embodiments, the number of filters is three or four.

Further preferably, when the number of the filters is three, the filtration precisions of the three filters are 1 μm, 0.01 μm and 0.01 μm in sequence; when the number of the filters is four, the filtering precisions of the four filters are 1 μm, 0.01 μm and 0.01 μm in sequence.

Preferably, the separation module comprises a membrane separation system, the membrane separation system comprises a membrane separator, the membrane separator comprises a plurality of membrane groups which can be used for separating the wellhead gas, the plurality of membrane groups are connected in series, and each membrane group is provided with an outlet which can be used for discharging.

Further preferably, the membrane separation system further comprises a feeding pipe connected with the inlet of the membrane separator, and the feeding pipe comprises a feeding pipe body, a fifth valve, a pressure valve and a flow meter, wherein the fifth valve, the pressure valve and the flow meter are respectively arranged on the feeding pipe body and can be opened or closed.

Further preferably, membrane separation system still includes a plurality of discharging pipes, the quantity of discharging pipe with the quantity of membrane group equals and every the discharging pipe with the export one-to-one of membrane group is connected, and is a plurality of the discharging pipe is parallelly connected in parallel, every the discharging pipe includes the discharging pipe body and sets up respectively on the discharging pipe body can adjust pressure's pressure valve, can adjust the flowmeter of flow, can open or the sixth valve that closes, can be used for the sample connection of taking a sample.

Preferably, the recovery and purification device further comprises a control module, and the control module is respectively connected with the purification module and the separation module and is used for controlling the operation of the purification module and the separation module.

Further preferably, the control module comprises a first control module arranged on the first mounting seat and a second control module arranged on the second mounting seat, the first control module is connected with the purification module, the second control module is connected with the separation module, and the first control module is connected with the second control module.

The second aspect of the present invention provides a recovery and purification method, which comprises using the recovery and purification device to recover and purify wellhead gas.

Preferably, the recovery purification method comprises any one of the following methods:

firstly, introducing well head gas into a purification module to recover and remove impurities from the well head gas;

secondly, leading the well head gas into a separation module to separate and purify the well head gas;

and thirdly, enabling the wellhead gas to sequentially pass through the purification module and the separation module so as to recover, remove impurities, separate and purify the wellhead gas.

Further preferably, in the first method, the wellhead gas is subjected to steam-water separation by a steam-water separation system, then filtered and decontaminated by a filtering system, and then heated by a heating system.

Preferably, in the third method, the wellhead gas is subjected to steam-water separation by a steam-water separation system, then is selectively filtered by a filtering system to remove impurities, and then is subjected to separation and purification by a membrane separation system after passing through a heating system.

Preferably, the purity of the well head gas is more than 90%.

Further preferably, the inlet pressure of the wellhead gas is 8-12 MPa.

Still more preferably, the inlet air flow of the well head gas is 300-500 Nm ³ /h。

Preferably, the heating temperature of the heating system is controlled to be 40-80 ℃.

Preferably, the purity of the recovered and purified well head gas is more than 99%, and the outlet gas flow is 160-240 Nm ³ /h。

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model provides a retrieve purification device simple structure and have a plurality of operating condition, can satisfy the recovery demand of well head gas under the different conditions, be applicable to different work occasions.

Drawings

FIG. 1 is a schematic view of the connection structure of a recovery and purification apparatus in example 1 of the present invention;

FIG. 2 is a front view of a purification module according to embodiment 1 of the present invention;

fig. 3 is a plan view of a purification module in embodiment 1 of the present invention;

fig. 4 is a front view of a separation module in embodiment 1 of the present invention;

fig. 5 is a top view of a separation module in embodiment 1 of the present invention;

FIG. 6 is a schematic view of the connection structure of the recovery and purification apparatus in example 2 of the present invention;

11, a water-steam separation system; 12. a filtration system; 121. a first filter; 122. a second filter; 123. a third filter; 124. a fourth filter; 13. a heating system; 14. an air inlet pipe; 141. a first valve; 142. a first pressure valve; 143. a first pressure reducing valve; 15. a first conduit; 151. a second valve; 16. a second conduit; 161. a third valve; 17. a third pipeline; 171. a fourth valve; 172. a second pressure reducing valve; 21. a membrane separator; 22. a fourth conduit; 221. a fifth valve; 222. a first electrically operated pressure valve; 223. a seventh valve; 224. a first flow meter; 225. a first sampling port; 226. a sixth valve; 23. a first discharge pipe; 231. a second flow meter; 232. an eighth valve; 233. a second electric pressure valve; 234. a tenth valve; 235. a second sampling port; 236. a ninth valve; 24. a second discharge pipe; 241. an eleventh valve; 242. a third flow meter; 243. a third electric pressure valve; 244. a thirteenth valve; 245; a third sampling port; 25. a fifth pipe assembly; 251. a twelfth valve; 261. a fourteenth valve; 271. a fifteenth valve; 281. a sixteenth valve; 31. a first mounting seat; 32. a second mounting seat; 41. a first control module; 42. a second control module; a. a port a; b. b, opening; c. c, opening; d. and d, a port.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "left" and "right" are based on the directions or positional relationships shown in fig. 3, the position of the a-port on the first supporting seat is left, and the other side of the a-port relative position is right. The above-described orientations or positional relationships are merely for convenience in describing embodiments of the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, terms such as "connected" and the like are to be broadly interpreted, and may be, for example, a mechanical connection, an electrical connection, or a communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

The application provides a retrieve purification device, including first mount pad 31, second mount pad 32, purification module and separation module, separation module sets up on first mount pad 31, and purification module sets up on second mount pad 32.

First mount pad 31 is the cuboid structure, and its length is 380~400cm, and the width is 100~120cm, and in this application, the height of first mount pad 31 does not do the restriction, can set for according to actual conditions. Second mount pad 32 is the cuboid structure, and its length is 450~500cm, and the width is 90~100cm, and in this application, the height of second mount pad 32 does not do the restriction yet, can set for according to actual conditions. Preferably, the height of the first mounting seat 31 is equal to the height of the second mounting seat 32.

The purification module comprises a steam-water separation system 11, a filtering system 12 and a heating system 13.

The steam-water separation system 11 comprises a steam-water separator for performing steam-water separation on wellhead gas and removing steam in the wellhead gas. The steam-water separator in the present application is a commercially available product, such as an MS9 steam-water separator. The filtration system 12 includes a plurality of filters connected in series for filtering the well head gas to remove impurities from the well head gas. The filtering precision of the filter is 0.01-1 mu m, and the filtering precision of the filter is improved or kept unchanged along the transmission direction of the well head gas. For example, when the number of filters is 3, the filtration accuracy of the 3 filters is 1 μm, 0.01 μm in this order; when the number of the filters is 4, the filtration accuracies of the 4 filters are 1 μm, 0.01 μm, and 0.01 μm in this order. The heating system 13 comprises a heater for heating the well head gas. The heater in this application is a commercially available product, such as a pipe heater.

The steam-water separation system 11, the filtering system 12 and the heating system 13 are communicated through pipelines. The pipeline comprises an air inlet pipe 14 connected with an air inlet of the steam-water separation system 11, a first pipeline 15 used for communicating the steam-water separation system 11 with the filtering system 12, a second pipeline 16 used for communicating the filtering system 12 with the heating system 13, and a third pipeline 17 used for communicating the steam-water separation system 11 with the heating system 13. The intake pipe 14 includes an intake pipe body, and a first valve 141 and a first pressure valve assembly that are provided on the intake pipe body, respectively. The first pipe 15 includes a first pipe body, and a second valve 151 provided on the first pipe body. The second pipe 16 includes a second pipe body, and a third valve 161 provided on the second pipe body. The third pipe 17 includes a third pipe body, and a fourth valve 171 and a second pressure valve assembly respectively provided on the third pipe body. The first valve 141, the second valve 151, the third valve 161, and the fourth valve 171 each have a function of being opened or closed, for example: the first valve 141, the second valve 151, the third valve 161, and the fourth valve 171 may be ball valves. The first pressure valve assembly, which in some embodiments is a pressure valve and a pressure relief valve connected in series, and the second pressure valve assembly, which is two pressure relief valves connected in series, each have the function of being able to regulate the pressure in the conduit. When the second pressure valve assembly is two pressure reducing valves connected in series, the fourth valve 171 is disposed between the two pressure reducing valves.

The separation module comprises a membrane separation system 21.

The membrane separation system 21 comprises a membrane separator including a plurality of membrane groups for separating the wellhead gas to remove gases such as carbon dioxide and sulfide from the wellhead gas. A plurality of membrane groups are connected in series, and each membrane group is provided with an outlet capable of being used for discharging.

In some embodiments, membrane separation system 21 still includes a plurality of discharging pipes, the quantity of discharging pipe equals and every discharging pipe is connected with the export one-to-one of membrane group with the quantity of membrane group, a plurality of discharging pipes are parallelly connected in parallel, the discharging pipe includes the discharging pipe body, can set up the pressure valve subassembly that can adjust pressure, can adjust the flowmeter of flow, can open or the sixth valve 226 that closes and can be used for the sample connection of sample on the discharging pipe body according to actual demand. The pressure valve component can be a ball valve and an electric pressure valve which are connected in series, a pressure controller is arranged on the ball valve, the pressure controller is connected with the electric pressure valve through an electric signal, and a flow meter and a sampling port can be arranged between the ball valve and the electric pressure valve. Of course, the flow meter and the sampling port can also be arranged at the front end of the ball valve or the rear end of the electric pressure valve according to actual requirements. The membrane separation system 21 further comprises a fourth pipe 22 connected with the inlet of the membrane separator, and the fourth pipe 22 comprises a fourth pipe body, on which an openable or closable valve, a pressure valve assembly capable of adjusting pressure, and a flow meter capable of adjusting flow rate can be arranged according to actual requirements. The pressure valve component can be an electric pressure valve and a ball valve which are connected in series, a pressure controller is arranged on the ball valve, and the pressure controller is connected with the electric pressure valve through an electric signal. The valve may be a ball valve. In some embodiments, a sampling port may also be provided on the fourth conduit 22.

The recycling and purifying device further comprises a control module, the control module comprises a first control module 41 and a second control module 42 which can be communicated through electric signals, the first control module 41 is arranged on the first mounting seat 31 and is connected with the purifying module, and the first control module is used for controlling the transmission flow and pressure of gas in the purifying module and the heating temperature of the heating system 13. A second control module 42 is disposed on the second mounting base 32 and is connected to the separation module for controlling the transfer flow rate and pressure of the gas in the separation module and the operation of the membrane separation system 21.

The present invention will be further described with reference to the following examples. However, the present invention is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not mentioned are conventional conditions in the industry. The technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1 to 5, a recycling and purifying apparatus includes a first mounting base 31, a second mounting base 32, a purifying module, a separating module, a first control module 41 and a second control module 42, wherein the purifying module and the first control module 41 are respectively disposed on the first mounting base 31, and the separating module and the second control module are respectively disposed on the second mounting base 32.

The first mounting seat 31 is a rectangular parallelepiped structure, and has a length of 380cm and a width of 100 cm. The second mounting seat 32 is a rectangular parallelepiped structure, and has a length of 450cm and a width of 90 cm.

The purification module comprises a steam-water separation system 11, a filtering system 12 and a heating system 13. The steam-water separation system 11 includes a steam-water separator. The filtration system 12 includes a first filter 121, a second filter 122, a third filter 123, and a fourth filter 144, and the first filter 121, the second filter 122, the third filter 123, and the fourth filter 144 are connected in series. The first filter 121 and the second filter 122 have a filtering accuracy of 1 μm, and the third filter 123 and the fourth filter 144 have a filtering accuracy of 0.01 μm. The heating system 13 comprises a heater, and the steam-water separator, the filter and the heater are communicated with each other through a pipeline. The pipeline comprises an air inlet pipe 14 connected with an air inlet of the steam-water separator, a first pipeline 15 used for communicating the steam-water separator and the filter, a second pipeline 16 used for communicating the filter and the heater, and a third pipeline 17 used for communicating the steam-water separator and the heater. Along the air inlet direction of the well head air, the air inlet pipe 14 is sequentially provided with a first valve 141 and a first pressure valve assembly, the first pipeline 15 is provided with a second valve 151, the second pipeline 16 is provided with a third valve 161, and the third pipeline 17 is provided with a fourth valve 171 and a second valve 151 assembly. The first valve 141, the second valve 151, the third valve 161 and the fourth valve 171 are all ball valves, the first pressure valve assembly is a first pressure valve 142 and a first pressure reducing valve 143 which are connected in series, and a first pressure gauge is arranged on the first pressure reducing valve 143. The second pressure valve assembly is two second pressure reducing valves 172 connected in series, a second pressure gauge is provided on the second pressure reducing valves 172, and a fourth valve 171 is provided between the two second pressure reducing valves 172. The first control module 41 is connected with the heater and is used for controlling the heating temperature of the heater. The steam-water separator is arranged in the middle of the first mounting seat 31, the filter and the heater are respectively arranged on the left side and the right side of the first mounting seat 31, and the first control module 41 is arranged on the right side of the heater.

The separation module comprises a membrane separation system 21. The membrane separation system 21 comprises a membrane separator, a fourth conduit 22, a first outlet conduit 23 and a second outlet conduit 24. The membrane separator comprises a first membrane group and a second membrane group, and the first membrane group and the second membrane group are connected in series. The inlet of the first membrane module is connected to a fourth pipeline 22, and the fourth pipeline 22 is sequentially provided with a fifth valve 221, a third pressure valve module, a first flow meter 224, a first sampling port 225 and a sixth valve 226. The third pressure valve component is a first electric pressure valve 222 and a seventh valve 223 which are connected in series, the seventh valve 223 is provided with a first pressure controller, and the first pressure controller is connected with the first electric pressure valve 222 and is used for controlling the opening degree of the first electric pressure valve 222. A third pressure reducing valve is connected to the first sampling port 225. The fifth valve 221, the sixth valve 226, and the seventh valve 223 are ball valves.

The outlet of the first membrane group is connected to the first discharging pipe 23, and the first discharging pipe 23 is sequentially provided with an eighth valve 232, a second flowmeter 231, a fourth pressure valve assembly, a second sampling port 235 and a ninth valve 236. The fourth pressure valve component is a second electric pressure valve 233 and a tenth valve 234 which are connected in series, the tenth valve 234 is provided with a second pressure controller, and the second sampling port 235 is provided with a fourth pressure reducing valve. The eighth valve 232, the ninth valve 236 and the tenth valve 234 are ball valves, and a third pressure gauge is disposed on the eighth valve 232.

The outlet of the second membrane group is connected with a second discharge pipe 24, the second discharge pipe 24 is sequentially provided with an eleventh valve 241, a third sampling port 245, a third flow meter 242, a third electric pressure valve 243 and a thirteenth valve 244, the eleventh valve 241 is connected with a third pressure controller, and the third pressure controller is connected with the third electric pressure valve 243. The first discharge pipe 23 is connected in parallel to the second discharge pipe 24, and the first discharge pipe 23 and the second discharge pipe 24 are connected to a fifth pipeline 25, respectively. A twelfth valve 251 is arranged on the fifth pipeline 25, and a fourth pressure gauge is arranged on the twelfth valve 251. The second control module 42 is arranged on the right side of the membrane separation system 21, and the second control module 42 is respectively connected with the membrane separator, the first pressure controller, the second pressure controller and the third pressure controller, and is used for controlling the operation of the membrane separator and the opening degree of each electric pressure valve.

The fourth conduit 22 of the separation module is connected to the outlet of the heater to communicate the separation module with the purification module.

The workflow of this embodiment is as follows:

the recovery and purification device in this embodiment has three operating states.

When the well head gas enters the gas inlet pipe 14, the steam-water separator, the first pipeline 15, the filter, the second pipeline 16 and the heater from the opening a in sequence to perform steam-water separation, filtration and heating, and the treated well head gas is discharged from the opening b.

When in the second working state, the fifth valve 221, the first electric pressure valve 222, the seventh valve 223, the sixth valve 226, the eighth valve 232, the second electric pressure valve 233, the tenth valve 234, the eleventh valve 241, the third electric pressure valve 243, the thirteenth valve 244, and the twelfth valve 251 are opened, and the wellhead gas enters the fourth pipe 22, the membrane separator, the first discharge pipe 23 or the second discharge pipe 24, and the fifth pipe 25 from the port c in sequence and can be discharged from the port d.

When in the third operating state, the fourth duct 22 is connected to the outlet of the heater, this operating state comprising the following two sub-operating states.

The sub-working state is (1):

when in the sub-operation state (i), the first valve 141, the first pressure valve 142, the first pressure reducing valve 143, the second valve 151, the third valve 161, the fifth valve 221, the first electric pressure valve 222, the seventh valve 223, the sixth valve 226, the eighth valve 232, the second electric pressure valve 233, the tenth valve 234, the eleventh valve 241, the third electric pressure valve 243, the thirteenth valve 244, and the twelfth valve 251 are opened, and the fourth valve 171 is closed.

Well head gas enters an air inlet pipe 14, a steam-water separator, a first pipeline 15, a filter, a second pipeline 16, a heater, a fourth pipeline 22, a membrane separator, a first discharge pipe 23 or a second discharge pipe 24 and a fifth pipeline 25 from an inlet a in sequence, and can be discharged from an outlet d.

This state is suitable for treating a gas having a treatment concentration of 90% or more, an intake pressure of 8 to 12MPa, and an intake flow of 300 to 500 Nm ³ The well head gas is treated by the heater at the heating temperature of 40-80 ℃. The gas flow in the first tapping pipe 23 is 52.3-77.2Nm ³ The gas flow in the second discharge pipe 24 is 107.7 to 162.8Nm ³ The flow rate of the treated well head gas discharged from the d port is 160-240 Nm ³ The concentration is 99 to 99.99 percent.

The sub-working state is two:

when the sub operation state is (c), the first valve 141, the first pressure valve 142, the first pressure reducing valve 143, the fourth valve 171, the fifth valve 221, the first electric pressure valve 222, the seventh valve 223, the sixth valve 226, the eighth valve 232, the second electric pressure valve 233, the tenth valve 234, the eleventh valve 241, the third electric pressure valve 243, the thirteenth valve 244, and the twelfth valve 251 are opened, and the second valve 151 and the third valve 161 are closed.

Well head gas enters an air inlet pipe 14, a steam-water separator, a first pipeline 15, a third pipeline 17, a second pipeline 16, a heater, a fourth pipeline 22, a membrane separator, a first discharge pipe 23 or a second discharge pipe 24 and a fifth pipeline 25 from an inlet a in sequence, and can be discharged from an outlet d.

Example 2

As shown in fig. 6, the present embodiment is different from embodiment 1 in that: the intake pipe 14 of the present embodiment is not provided with the first pressure valve assembly. The filtration system 12 of the present embodiment is a heater in which three filters are connected in series, and the filtration accuracy of the three filters is 1 μm, 0.01 μm, and 0.01 μm in this order. The membrane filter of this embodiment includes first membrane group, second membrane group and third membrane group, and the exit linkage fourteenth valve 261 of first membrane group, the exit linkage fifteenth valve 271 of second membrane group, the exit linkage sixteenth valve 281 of third membrane group.

When the well head gas is in the first working state, the first valve 141, the second valve 151 and the third valve 161 are opened, the fourth valve 171 is closed, the well head gas sequentially enters the gas inlet pipe 14, the steam-water separator, the first pipeline 15, the filter, the second pipeline 16 and the heater from the opening a to be subjected to steam-water separation, filtration and heating, and the treated well head gas is discharged from the outlet of the heater.

When in the second working state, the working state comprises the following three sub-working states.

The sub-working state is (1):

when in the sub-operating state (r), the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the fourteenth valve 261 are opened, and the wellhead gas sequentially enters the fourth pipeline 22 and the membrane separator and can be discharged from the outlet of the first membrane group.

A sub-working state (II):

when in the sub-operating state (c), the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the fifteenth valve 271 are opened, and the wellhead gas sequentially enters the fourth pipeline 22 and the membrane separator and can be discharged from the outlet of the second membrane group.

Working state of the child

When in the sub-operating state (c), the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the sixteenth valve 281 are opened, and the wellhead gas sequentially enters the fourth pipeline 22 and the membrane separator and can be discharged from the outlet of the third membrane group.

When in the third operating condition, the fourth conduit 22 is connected to the outlet of the heater, which includes the following six sub-operating conditions.

The sub-working state is (1):

in the sub-operation state (i), the first valve 141, the second valve 151, the third valve 161, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223, and the fourteenth valve 261 are opened, and the fourth valve 171 is closed.

Well head gas enters the gas inlet pipe 14, the steam-water separator, the first pipeline 15, the filter, the second pipeline 16, the heater, the fourth pipeline 22 and the membrane separator from the inlet a in sequence, and can be discharged from the outlet of the first membrane group.

A sub-working state (II):

when the sub-working state is reached, the first valve 141, the second valve 151, the third valve 161, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the fifteenth valve 271 are opened, the fourth valve 171 is closed, and the well head gas sequentially enters the air inlet pipe 14, the steam-water separator, the first pipeline 15, the filter, the second pipeline 16, the heater, the fourth pipeline 22 and the membrane separator from the inlet a, and can be discharged from the outlet of the second membrane group.

The sub working state (c):

when the sub-working state is created, the first valve 141, the second valve 151, the third valve 161, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223, and the sixteenth valve 281 are opened, the fourth valve 171 is closed, and the wellhead gas sequentially enters the intake pipe 14, the steam-water separator, the first pipe 15, the filter, the second pipe 16, the heater, the fourth pipe 22, and the membrane separator from the inlet a, and can be discharged from the outlet of the third membrane group.

The sub working state (IV):

when in the sub-operating state (iv), the first valve 141, the fourth valve 171, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223, and the fourteenth valve 261 are opened, the second valve 151 and the third valve 161 are closed, and the wellhead gas sequentially enters the intake pipe 14, the steam-water separator, the first pipe 15, the third pipe 17, the second pipe 16, the heater, the fourth pipe 22, and the membrane separator from the inlet a, and can be discharged from the outlet of the first membrane group.

A sub-working state fifth:

when the sub-working state is the fifth working state, the first valve 141, the fourth valve 171, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the fifteenth valve 271 are opened, the second valve 151 and the third valve 161 are closed, and the well head gas sequentially enters the gas inlet pipe 14, the steam-water separator, the first pipeline 15, the third pipeline 17, the second pipeline 16, the heater, the fourth pipeline 22 and the membrane separator from the inlet a, and can be discharged from the outlet of the second membrane group.

The sub-working state:

when in the sub-working state, the first valve 141, the fourth valve 171, the fifth valve 221, the first electric pressure valve 222, the sixth valve 226, the seventh valve 223 and the sixteenth valve 281 are opened, the second valve 151 and the third valve 161 are closed, and the wellhead gas sequentially enters the intake pipe 14, the steam-water separator, the first pipeline 15, the third pipeline 17, the second pipeline 16, the heater, the fourth pipeline 22 and the membrane separator from the inlet a, and can be discharged from the outlet of the third membrane group.

The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A well head gas recovery and purification device is characterized in that: the wellhead gas recovery and purification device comprises a purification module capable of recovering and purifying wellhead gas and a separation module capable of separating and purifying the wellhead gas, the purification module comprises a steam-water separation system (11) capable of performing steam-water separation on the wellhead gas, a filtering system (12) capable of filtering the wellhead gas and a heating system (13) capable of heating the wellhead gas, the steam-water separation system (11), the filtering system (12) and the heating system (13) are communicated through pipelines, the steam-water separation system (11) comprises a steam-water separator, the filtering system (12) comprises a plurality of filters connected in series, and the heating system (13) comprises a heater; the separation module comprises a membrane separation system (21), the membrane separation system (21) comprising a membrane separator,

the wellhead gas recovery and purification device has three states, and when the wellhead gas recovery and purification device is in the first state, the purification module is communicated with a wellhead gas outlet pipe so as to recover and remove impurities from the wellhead gas;

when the well head gas separation module is in a second state, the separation module is communicated with a gas outlet pipe of the well head gas so as to separate and purify the well head gas;

When the well head gas recovery device is in a third state, the purification module is respectively communicated with the separation module and the well head gas outlet pipe so as to recover, remove impurities, separate and purify the well head gas.

2. The wellhead gas recovery and purification device according to claim 1, characterized in that: the wellhead gas recovery and purification device further comprises a first mounting seat (31) and a second mounting seat (32), the purification module is arranged on the first mounting seat (31), the length of the first mounting seat (31) is 380-400 cm, and the width of the first mounting seat (31) is 100-120 cm; the separation module is arranged on the second installation seat (32), the length of the second installation seat (32) is 450-500 cm, and the width of the second installation seat is 90-100 cm.

3. The wellhead gas recovery and purification device according to claim 1, characterized in that: the purification module has two working states, and when the purification module is in the working state A, the steam-water separation system (11), the filtering system (12) and the heating system (13) are communicated in sequence to perform steam-water separation, filtering and heating on the wellhead gas; when the purification module is in the working state B, the steam-water separation system (11) is communicated with the heating system (13) to separate steam from water and heat the wellhead gas.

4. The wellhead gas recovery and purification device according to claim 3, characterized in that: the purification module further comprises an air inlet pipe (14) which can be connected with an air outlet pipe of the wellhead gas, the air inlet pipe (14) comprises an air inlet pipe body, a first valve (141) which is arranged on the air inlet pipe body and can be opened or closed, and a first pressure valve assembly which can be used for adjusting pressure, the air inlet pipe (14) is connected with an inlet of the steam-water separation system (11),

the outlet of the steam-water separation system (11) is communicated with the inlet of the filtering system (12) through a first pipeline (15), the first pipeline (15) comprises a first pipeline body and a second valve (151) which is arranged on the first pipeline body and can be opened or closed,

the outlet of the filtering system (12) is communicated with the inlet of the heating system (13) through a second pipeline (16), the second pipeline (16) comprises a second pipeline body and a third valve (161) which is arranged on the second pipeline body and can be opened or closed,

the outlet of the steam-water separation system (11) is communicated with the inlet of the heating system (13) through a third pipeline (17), and the third pipeline (17) comprises a third pipeline body, a fourth valve (171) and a second pressure valve assembly, wherein the fourth valve (171) and the second pressure valve assembly are arranged on the third pipeline body and can be opened or closed respectively.

5. The wellhead gas recovery and purification device according to claim 3, characterized in that: the filtering precision of the filter is 0.01-1 mu m, and the filtering precision of the filter is improved or kept unchanged along the transmission direction of the well head gas.

6. The wellhead gas recovery and purification device according to claim 1, characterized in that: the membrane separator comprises a plurality of membrane groups which can be used for separating the wellhead gas, the membrane groups are connected in series, and each membrane group is provided with an outlet which can be used for discharging.

7. The wellhead gas recovery and purification device according to claim 6, characterized in that: the separation module further comprises a fourth pipeline (22) connected with an inlet of the membrane separation system (21), wherein the fourth pipeline (22) comprises a fourth pipeline body, a fifth valve (221) which is arranged on the fourth pipeline body and can be opened or closed, a pressure valve capable of adjusting pressure and a flow meter capable of adjusting flow.

8. The wellhead gas recovery and purification device according to claim 6, characterized in that: the membrane separation system (21) still includes a plurality of discharging pipes, the quantity of discharging pipe with the quantity of membrane group equals and every the discharging pipe with the export one-to-one of membrane group is connected, and is a plurality of the discharging pipe is parallelly connected in parallel, every the discharging pipe includes the discharging pipe body and sets up respectively on the discharging pipe body and can adjust pressure's pressure valve, can adjust the flowmeter of flow, can open or the sixth valve (226) that close, the sample connection that can take a sample.

9. The wellhead gas recovery and purification device according to claim 1, characterized in that: the wellhead gas recovery and purification device further comprises a control module, wherein the control module is connected with the purification module and the separation module and used for controlling the operation of the purification module and the separation module.