CN111594760A

CN111594760A - Integrated integrated device suitable for natural gas collection

Info

Publication number: CN111594760A
Application number: CN202010419819.7A
Authority: CN
Inventors: 张磊; 王登海; 刘银春; 杨光; 高玉龙; 郑欣; 薛岗; 王莉华; 周妮妮; 何蕾; 董艳国; 冯亚军
Original assignee: China National Petroleum Corp; Xian Changqing Technology Engineering Co Ltd
Current assignee: China National Petroleum Corp; Xian Changqing Technology Engineering Co Ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-08-28

Abstract

The invention protects an integrated device suitable for natural gas collection, which comprises a gas collection system, a separation flash system, an external transmission system and a sewage system which are sequentially communicated, wherein the external transmission system is provided with two output pipelines, one of the output pipelines is used for transmitting natural gas to the downstream, and the other output pipeline is used for transmitting the natural gas to a self-gas-using system; the self-gas system is provided with two output pipelines, wherein one pipeline transmits natural gas to the torch and the generator, and the other pipeline transmits natural gas to the emptying system; the emptying system is connected with the gas collection system and the separation flash system; the separation flash system is connected with a sewage system. The processing medium comprises sulfur-containing natural gas and non-sulfur-containing natural gas, the PLC in the integrated device can complete the temperature detection, pressure detection and remote transmission of the natural gas in the pipeline, the display and monitoring of the valve state and the like, and the detection and monitoring of the liquid level in the separation flash tank, the device can realize remote emergency cut-off, remote emptying and safe emptying, the automation degree is high, and the application range is wide.

Description

Integrated integrated device suitable for natural gas collection

Technical Field

The invention belongs to the field of natural gas collection, and particularly relates to an integrated device suitable for natural gas collection, in particular to a low-pressure gas collection station in a gas field.

Background

With the development of economy in China, the national demand for energy sources is greater and greater, natural gas serving as clean energy sources is developed quickly, and the natural gas serving as a ground construction part for natural gas development is large in construction scale and large in number of construction stations.

The ground flow of natural gas development is from a wellhead to a gas collecting station and from the gas collecting station to a treatment plant, the gas quality requirement of the commodity gas is met through the treatment of the treatment plant, and the commodity gas is conveyed to a city for use by consumers. The gas collecting station plays an important role, has the functions of gas collection, separation, metering, pressurization, pipe cleaning and the like, and simultaneously provides gas for workers and life in the gas collecting station and gas for power equipment such as a generator, a compressor and the like.

At present, the ground construction of a gas field conveys required equipment, valves, pipe fittings and the like to a station, and then the construction is organized according to design files, so that the problems of long construction period, high organization coordination difficulty, high investment cost, large occupied area and the like exist.

Disclosure of Invention

An object of an embodiment of the present invention is to provide an integrated device suitable for natural gas collection, so as to overcome the above technical drawbacks.

In order to solve the technical problem, the invention provides an integrated device suitable for natural gas collection, which comprises a gas collection system, a separation flash system and an output system which are sequentially communicated from upstream to downstream along the conveying direction of natural gas, wherein the output system is provided with two output pipelines, one pipeline conveys the natural gas to the downstream, the other pipeline conveys the natural gas to a self-use gas system, the self-use gas system is provided with two output pipelines, one pipeline conveys the natural gas to a torch and a generator, the other pipeline conveys the natural gas to a vent system, an input port of the vent system is connected with the gas collection system through a pipeline, an output port of the vent system is connected to the separation flash system through a pipeline, and the separation flash system is connected with a blowdown system;

the integrated device also comprises a PLC, and the gas collection system, the separation flash system, the output system, the self-gas utilization system and the sewage discharge system are respectively connected with the PLC.

The gas collection system comprises a plurality of gas transmission pipelines, wherein the inlet of each gas transmission pipeline is connected to a well site for gas supply, the outlets of all the gas transmission pipelines are converged at a gas collection manifold provided with a first pressure and temperature detection valve group, the gas collection manifold is communicated with the separation flash system through a pipeline, and the pipeline is provided with a first high-sealing sampling stop valve with a pressure gauge and a control valve thereof;

each gas transmission pipeline is connected with a gas collection electric three-way valve in series, and a third pipe orifice of the gas collection electric three-way valve is connected to the emptying system through a pipeline.

Preferably, the separation flash system comprises a double-drum separation flash tank, a tank body of the double-drum separation flash tank is provided with a remote transmission liquid level transmitter and a pressure on-site display and remote transmission device, and the double-drum separation flash tank consists of a separation cavity and a flash cavity;

gas from the gas collection system is connected into the separation cavity for gas-liquid separation, the separated natural gas is conveyed to an external conveying system through a pipeline, and the separated liquid is conveyed to a sewage disposal system through the pipeline;

the gas coming from the emptying system is connected into a flash evaporation cavity for gas-liquid separation, the separated natural gas is output in two paths, one path of the separated natural gas passes through a water seal cylinder to a torch, the other path of the separated natural gas passes through a safety valve to the torch, an internal thread gate valve for water injection is installed at the inlet end of the water seal cylinder, and the separated liquid passes through a pipeline to a sewage discharge system;

the tank bottom of the separation cavity and the tank bottom of the flash evaporation cavity are respectively connected with a pipeline, and ball valves with word blind plates are connected on the pipelines in series.

Furthermore, the external transportation system comprises an external transportation pipeline, an air inlet pipe orifice of the external transportation pipeline is communicated with the separation cavity of the double-cylinder separation flash tank, an air outlet pipe orifice of the external transportation pipeline is divided into two paths, wherein one path of the external transportation pipeline conveys natural gas to the downstream, and the other path of the external transportation pipeline conveys natural gas to the self-gas-using system;

the first external electric three-way valve, the check valve, the second external electric three-way valve, the first external manual ball valve, the pipe cleaner and the second external manual ball valve are sequentially arranged on the external pipeline from upstream to downstream, a third pipe orifice of the first external electric three-way valve is connected with an inlet of a natural gas supercharging or dehydration device outside the integrated device through a pipeline, and an outlet of the natural gas supercharging or dehydration device is communicated with a third pipe orifice of the second external electric three-way valve through a pipeline;

the external conveying system further comprises a branch pipeline connected with the external conveying pipeline in parallel, one end of the branch pipeline is connected into the external conveying pipeline between the second external conveying electric three-way valve and the first external conveying manual ball valve, the other end of the branch pipeline is connected into the external conveying pipeline on the downstream of the second external conveying manual ball valve, a third external conveying manual ball valve, a pore plate flowmeter and a fourth external conveying manual ball valve are sequentially arranged on the branch pipeline along the conveying direction of natural gas, and a pressure remote transmission device is installed on the external conveying pipeline on the downstream of the fourth external conveying manual ball valve.

Preferably, the self-gas-using system comprises a self-gas-using pipeline, an air inlet pipe orifice of the self-gas-using pipeline is communicated with an air outlet pipe orifice of the external transmission pipeline, the self-gas-using pipeline is divided into two paths after passing through a self-gas-using electric ball valve I, one path of the self-gas-using pipeline is sequentially provided with a high-sealing sampling stop valve II with a pressure gauge and a control valve thereof, a self-gas-using manual ball valve I, a T-shaped filter I, a gas pressure regulator I and a self-gas-using manual ball valve II along the natural gas transmission direction, and the other path of the self-gas-using manual ball valve II is sequentially provided with a self-gas-using manual ball valve III, a T-shaped filter II, a gas pressure regulator II;

two pipelines are respectively converged at an outlet of a self-used pneumatic manual ball valve II and an outlet of a high-sealing sampling stop valve III with a pressure gauge and a control valve thereof, an intelligent precession flowmeter, a pressure and temperature detection valve group II and a gas-liquid separator are sequentially installed on the converged pipelines along the natural gas conveying direction, a high-sealing sampling stop valve IV with a pressure gauge and a control valve thereof and an in-situ liquid level display meter are installed on the gas-liquid separator, a liquid discharge pipeline of the gas-liquid separator is connected in series with a self-used pneumatic manual ball valve V, the top end of the gas-liquid separator is provided with two gas outlet pipelines, one gas outlet pipeline conveys natural gas to a torch through a self-used pneumatic manual ball valve VI and an electromagnetic valve to serve as fuel gas, and the other gas outlet pipeline conveys natural;

and a pipeline between the intelligent precession flowmeter and the self-used pneumatic manual ball valve II or a pipeline between the intelligent precession flowmeter and the high-seal sampling stop valve III with the pressure gauge and the control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected into an emptying system.

Furthermore, the self-using gas system comprises a self-using gas pipeline, an air inlet pipe orifice of the self-using gas pipeline is communicated with an air outlet pipe orifice of the external transmission pipeline, the self-using gas pipeline is divided into two paths after passing through the self-using gas electric ball valve I, one path of the self-using gas electric ball valve I is sequentially provided with a high-sealing sampling stop valve II with a pressure gauge and a control valve thereof, a self-using gas manual ball valve I, a T-shaped filter I, a gas pressure regulator I and a self-using gas manual ball valve II along the natural gas transmission direction, and the other path of the self-using gas manual ball valve II is sequentially provided with a self-using gas manual ball valve III, a T-shaped filter II, a gas pressure regulator II, a self-using gas manual ball;

two pipelines are respectively converged at the outlet of a self-used gas manual ball valve II and the outlet of a high-sealing sampling stop valve III with a pressure gauge and a control valve thereof, the converged pipelines are connected into a gas-liquid separator, the gas-liquid separator is provided with a high-sealing sampling stop valve IV with a pressure gauge and a control valve thereof and a local liquid level display meter, an intelligent precession flowmeter and a pressure and temperature detection valve group II are sequentially arranged on a gas pipe at the top end of the gas-liquid separator along the conveying direction of natural gas, the gas pipe is divided into two pipelines at the outlet of the pressure and temperature detection valve group II, wherein one pipeline conveys the natural gas to a torch through a self-used gas manual ball valve VI and an electromagnetic valve to serve as fuel gas, and the other pipeline conveys the natural gas;

and a pipeline between the gas-liquid separator and the self-gas manual ball valve II or a pipeline between the gas-liquid separator and the high-sealing sampling stop valve III with the pressure gauge and the control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected into an emptying system.

Preferably, the emptying system consists of an emptying pipeline of the gas collecting system and an emptying pipeline of the self-service gas system;

the gas collection manifold of the gas collection system is provided with two paths of emptying pipelines, wherein one path of emptying pipeline conveys emptying natural gas to a flash chamber of the double-cylinder separation flash tank through a manual ball valve I and a safety valve I, and the other path of emptying pipeline conveys emptying natural gas to the flash chamber of the double-cylinder separation flash tank through an electric ball valve and a throttling stop emptying valve II;

third pipe orifices of all electric three-way valves of the gas collection system are cut to a first emptying valve through throttling to convey emptied natural gas to a flash chamber of the double-barrel separation flash tank;

two paths of emptying pipelines which are connected in parallel are arranged in the self-gas system, wherein one path of emptying pipeline conveys emptying natural gas to a flash chamber of the double-cylinder separation flash tank through a throttling stop emptying valve III, and the other path of emptying pipeline conveys emptying natural gas to the flash chamber of the double-cylinder separation flash tank through a manual ball valve II and a safety valve II;

and the vented natural gas of other devices except the integrated device is connected into a flash chamber of the double-cylinder separation flash tank.

Furthermore, the sewage discharge system is divided into two parts, namely a separation cavity sewage discharge pipe and a flash evaporation cavity sewage discharge pipe;

one end of a separation cavity blow-off pipe is communicated with a separation cavity of the double-barrel separation flash tank, the other end of the separation cavity blow-off pipe is divided into two pipelines, one pipeline is used for emergency liquid drainage, a first blowdown manual ball valve, an electric regulating valve and a first blowdown electric ball valve are sequentially arranged on the emergency liquid drainage pipeline along the medium flowing direction, the other pipeline is used for normal liquid drainage, a second blowdown manual ball valve, a first drain valve and a blowdown stop valve are sequentially arranged on the normal liquid drainage pipeline along the medium flowing direction, the blowdown stop valve is connected with a third blowdown manual ball valve in parallel to serve as a bypass valve, and the two pipelines are finally and respectively communicated with;

one end of a blow-off pipe of the flash cavity is communicated with the flash cavity of the double-cylinder separation flash tank, the other end of the blow-off pipe of the flash cavity is divided into two pipelines which are mutually standby, a blow-off electric ball valve II and a blow-off manual ball valve IV are sequentially arranged on one pipeline along the medium flowing direction, a blow-off electric ball valve III and a blow-off electric ball valve IV are sequentially arranged on the other pipeline along the medium flowing direction, and the two pipelines are finally respectively introduced into a sewage treatment facility.

Preferably, the sewage system is divided into two parts, namely a separation cavity sewage pipe and a flash evaporation cavity sewage pipe;

one end of a separation cavity sewage discharge pipe is communicated with a separation cavity of the double-cylinder separation flash tank, the other end of the separation cavity sewage discharge pipe is divided into two pipelines, one pipeline serves as emergency liquid discharge, a first sewage discharge manual ball valve, an electric regulating valve and a first sewage discharge electric ball valve are sequentially arranged on the emergency liquid discharge pipeline along the medium flowing direction, the first sewage discharge electric ball valve is communicated with a sewage treatment facility through the pipeline, the other pipeline serves as normal liquid discharge, a second sewage discharge manual ball valve, a first drain valve and a first sewage discharge stop valve are sequentially arranged on the normal liquid discharge pipeline along the medium flowing direction, the first sewage discharge stop valve is communicated with a flash cavity of the double-cylinder separation flash tank through the pipeline, the third sewage discharge stop valve is connected with a third sewage discharge manual ball valve in parallel, and sewage pipelines of other devices except the integrated;

one end of a blow-off pipe of the flash cavity is communicated with the flash cavity of the double-barrel separation flash tank, the other end of the blow-off pipe of the flash cavity is divided into two pipelines which are mutually standby, a fourth blow-off manual ball valve, a second drain valve and a sixth blow-off manual ball valve are sequentially arranged on one pipeline along the medium flowing direction, a seventh blow-off manual ball valve connected with the second drain valve in parallel is used as a bypass valve, a third blow-off electric ball valve and a fourth blow-off electric ball valve are sequentially arranged on the other pipeline along the medium flowing direction, and finally the two pipelines are respectively introduced into a sewage.

one end of a separation cavity blow-off pipe is communicated with a separation cavity of the double-barrel separation flash tank, the other end of the separation cavity blow-off pipe is divided into two pipelines, one pipeline is used for emergency liquid drainage, a blow-off manual ball valve eight and a blow-off electric ball valve five are sequentially arranged on the emergency liquid drainage pipeline along the medium flowing direction, the other pipeline is used for normal liquid drainage, a blow-off manual ball valve I, an electric regulating valve and a blow-off electric ball valve I are sequentially arranged on the normal liquid drainage pipeline along the medium flowing direction, and the two pipelines are led into a sewage treatment facility after;

The invention has the following beneficial effects:

the integrated device suitable for natural gas collection can be applied to oil and gas field ground construction engineering, the construction of low-pressure gas collection station yard in the application period, the processing medium comprises sulfur-containing natural gas and non-sulfur-containing natural gas, the PLC in the integrated device can complete the temperature detection, pressure detection and remote transmission of the natural gas in the pipeline, the display and monitoring of valve states and the like, and the detection and monitoring of liquid level in the separation flash tank, and each valve can be remotely and emergently cut off, remotely emptied and safely emptied, the automation degree is high, and the application range is wide.

In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic flow diagram of an integrated apparatus suitable for natural gas collection.

Fig. 2 is a schematic flow diagram of the gas collection system a.

Fig. 3 is a schematic flow diagram of the gas collection system B.

Figure 4 is a schematic flow diagram of a separation flash system.

Fig. 5 is a schematic flow diagram of the delivery system a.

Fig. 6 is a flow diagram of the delivery system B.

FIG. 7 is a schematic flow diagram of the flare system A.

FIG. 8 is a schematic flow diagram of the flare system B.

Fig. 9 is a schematic flow diagram of the self-service gas system a.

Fig. 10 is a schematic flow diagram of the self-service gas system B.

Fig. 11 is a schematic flow diagram of the sewerage system a.

Fig. 12 is a schematic flow diagram of the soil exhaust system B.

Fig. 13 is a schematic flow diagram of the sewerage system C.

Description of reference numerals:

1. a gas collection system; 2. a separation flash system; 3. an output system, 4, an emptying system; 5. a self-service gas system; 6. a blowdown system; 7, PLC;

101. a gas collection manifold; 102. a high-sealing sampling stop valve I with a pressure gauge and a control valve thereof; 103. a first pressure and temperature detection valve group; 104. a gas-collecting electric three-way valve; 105. a gas-collecting electric ball valve;

201. a double-drum separation flash tank; 202. a remote transmission liquid level transmitter; 203. a pressure on-site display and remote transmission device; 204. a flash safety valve; 205. an internal thread gate valve; 206. a water seal cylinder; 207. a ball valve with an 8-shaped blind plate;

301. an output electric three-way valve I; 302. a check valve; 303. an output electric three-way valve II; 304. outputting a manual ball valve I; 305. a pipe cleaner; 306. outputting a manual ball valve II; 307. outputting a manual ball valve III; 308. an orifice plate flowmeter; 309. outputting a manual ball valve IV; 310. a pressure remote transmission device;

401. a first throttling stop emptying valve; 402. a second throttling cut-off emptying valve; 403. an electric ball valve; 404. a first safety valve; 405. a first manual ball valve; 406. a third throttling stop emptying valve; 407. a second manual ball valve; 408. a second safety valve;

501. a self-gas-using electric ball valve I; 502. a second high-sealing sampling stop valve with a pressure gauge and a control valve thereof; 503. a first pneumatic and manual ball valve is used; 504. T-filter one; 505. a first gas pressure regulator; 506. a second self-pneumatic manual ball valve; 507. a third pneumatic and manual ball valve is used; 508, a T-shaped filter II; 509. a second gas pressure regulator; 510. a self-use pneumatic manual ball valve IV; 511. a third high-sealing sampling stop valve with a pressure gauge and a control valve thereof; 512. an intelligent precession flow meter; 513. a second pressure and temperature detection valve group; 514. a high-sealing sampling stop valve IV with a pressure gauge and a control valve thereof; 515. a sixth self-use pneumatic and manual ball valve; 516. an electromagnetic valve; 517. a seventh self-use pneumatic and manual ball valve; 518. a fifth pneumatic and manual ball valve; a gas-liquid separator; 520. an in-situ liquid level display meter;

601. a first manual sewage draining ball valve; 602. an electric control valve; 603. a first sewage discharge electric ball valve; 604. a second manual sewage draining ball valve; 605. a first drain valve; 606. a blowdown stop valve; 607. a third manual ball valve for sewage disposal; 608. a second pollution discharge electric ball valve; 609. a fourth manual ball valve for sewage disposal; 610. a third pollution discharge electric ball valve; 611. a fourth pollution discharge electric ball valve; 612. a fifth manual sewage draining ball valve; 613. a second drain valve; 614. a manual ball valve sixth for sewage disposal; 615. a sewage discharge manual ball valve seventh; 616. a manual ball valve eighth for sewage disposal; 617. and a fifth sewage discharge electric ball valve.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the integrated device for natural gas collection described in this specification.

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

The first embodiment:

the first embodiment of the invention relates to an integrated device suitable for natural gas collection, which comprises a gas collection system 1, a separation flash system 2 and an external delivery system 3 which are sequentially communicated from upstream to downstream along the delivery direction of natural gas, wherein the external delivery system 3 is provided with two output pipelines, one pipeline delivers natural gas to the downstream, the other pipeline delivers natural gas to a self-use gas system 5, the self-use gas system 5 is provided with two output pipelines, one pipeline delivers natural gas to a torch and a generator, the other pipeline delivers natural gas to a vent system 4, the input port of the vent system 4 is connected with the gas collection system 1 through a pipeline, the output port of the vent system 4 is connected with the separation flash system 2 through a pipeline, and the separation flash system 2 is connected with a blowdown system 6;

the integrated device also comprises a PLC7, and the gas collection system 1, the separation flash system 2, the output system 3, the self-gas system 5 and the sewage system 6 are respectively connected with the PLC 7.

The working process of the integrated device is as follows:

well site incoming gas enters a gas collection system 1 through a pipeline, the well site incoming gas is converged and discharged into a separation flash system 2 after being discharged into the gas collection system 1 to be subjected to gas-liquid separation, separated liquid is discharged into a sewage discharge system 6, separated gas is conveyed to an external conveying system 3, the external conveying system 3 divides treated natural gas into two paths, one path is conveyed to downstream, the other path is conveyed to a self-gas utilization system 5, the natural gas is filtered and subjected to gas-liquid separation through the self-gas utilization system 5, the natural gas is divided into two paths, one path is conveyed to a torch and a generator, the other path is conveyed to a discharge system 4, the discharge system 4 is used for discharging the natural gas on one hand, on the other hand, the discharged natural gas can be collected to the separation flash system 2, liquid is separated through a flash chamber of the separation flash system 2, the separated liquid is discharged into the sewage discharge system 6, and the separated gas is.

All above all systems are all connected PLC electrically, by opening and closing, the detection system temperature and the pressure of each system of PLC control to and control fuel gas automatic pressure regulating, superpressure cut off, long-range urgent cutting off, flow automatic measurement, PLC is commercially available.

The integrated device suitable for natural gas collection can be applied to oil and gas field ground construction engineering, the construction of low-pressure gas collection station in the application period is suitable, the processing medium comprises sulfur-containing natural gas and non-sulfur-containing natural gas, the working pressure is 0.8-5.2 MPa, and the device has multiple functions, high automation degree and wide application range.

Second embodiment:

on the basis of the first embodiment, referring to fig. 2, the gas collection system a includes a plurality of gas transmission pipelines, an inlet of each gas transmission pipeline is connected to a well site for gas, outlets of all the gas transmission pipelines are merged to a gas collection manifold 101 provided with a pressure and temperature detection valve group one 103, the gas collection manifold 101 is connected to the separation flash system 2 through a pipeline, and the pipeline is provided with a high-sealing sampling stop valve one 102 with a pressure gauge and a control valve thereof;

each gas transmission pipeline is connected in series with a gas collection electric three-way valve 104, a third pipe orifice of the gas collection electric three-way valve 104 is connected to the emptying system 4 through a pipeline, and a gas collection manifold 101 is also connected to the emptying system 4 through a pipeline.

The gas-collecting electric three-way valve 104 has the functions of switching and cutting off the flow, which are specifically as follows:

when the well site normally works, gas from the well site flows to a gas collection header 101 through a gas collection electric three-way valve 104;

when natural gas is discharged, the well site gas flows to the discharge system 4 through the gas-collecting electric three-way valve 104;

when the well site gas incoming pipeline has problems, the gas collection electric three-way valve 104 is switched off, and the gas collection manifold 101 conveys the collected well site gas to the separation flash system 2;

when the device has problems or is overhauled, all the gas collection electric three-way valves 104 are closed, and natural gas in the pipeline passes through the emptying pipeline on the gas collection header 101 to the emptying system 4.

In the above process, the first pressure and temperature detection valve group 103 is used for detecting the pipeline pressure and the medium temperature, and the high-sealing sampling stop valve 102 with the pressure meter and the control valve thereof is used for sampling detection and pressure measurement, and the two meters can be purchased in the market.

The third embodiment:

as an alternative to the gas collection system a, referring to fig. 3, the gas collection system B includes a gas transmission pipeline, an inlet of the gas transmission pipeline is connected to the well site for gas supply, an outlet of the gas transmission pipeline is connected to the separation flash system 2, and the gas transmission pipeline is connected to the emptying system 4 through a pipeline;

the gas transmission pipeline is connected in series with a gas collection electric ball valve 105, and a high-sealing sampling stop valve with a pressure gauge and a control valve thereof 102 and a pressure and temperature detection valve group 103 are sequentially arranged at the downstream of the gas collection electric ball valve 105.

During normal operation, gas from a well site flows to the separation flash system 2 through the gas-collecting electric ball valve 105;

when the device itself has problems or is being serviced, the gas collection motorized ball valve 105 is closed and the natural gas in the pipeline is passed through the flare line to the flare system 4.

Fourth embodiment:

on the basis of the second embodiment, referring to fig. 4, the separation flash system 2 comprises a double-cylinder separation flash tank 201, a remote liquid level transmitter 202 and a pressure on-site display and remote transmission device 203 are installed on a tank body of the double-cylinder separation flash tank 201, and the double-cylinder separation flash tank 201 consists of a separation cavity and a flash cavity;

gas coming from the gas collection system 1 is connected into a separation cavity for gas-liquid separation, the separated natural gas is conveyed to an external conveying system 3 through a pipeline, and the separated liquid is conveyed to a sewage system 6 through a pipeline;

the incoming gas of the emptying system 4 is connected into a flash evaporation cavity for gas-liquid separation, the separated natural gas is output in two paths, one path of the natural gas passes through a water seal cylinder 206 to a torch, the other path of the natural gas passes through a safety valve 204 to the torch, an internal thread gate valve 205 for water injection is installed at the inlet end of the water seal cylinder 206, and the separated liquid passes through a pipeline to a sewage discharge system 6;

the tank bottom of the separation cavity and the tank bottom of the flash evaporation cavity are respectively connected with a pipeline, and a ball valve 207 with an 8-shaped blind plate is connected on the pipeline in series.

The double-drum separation flash tank 201 adopts a horizontal separator and is divided into a left cavity and a right cavity, the left cavity is a separation cavity, the right cavity is a heating cavity, the lower part is a liquid accumulation cavity, a baffle is arranged in the inlet of the separation cavity, a corrugated plate is arranged in the middle of the separation cavity, the particle size of solid particles in natural gas which can be removed by the separation cavity is less than or equal to 20 microns, the separation efficiency is more than 99.9 percent, and the double-drum separation flash tank 201 is provided with two liquid level systems for liquid level.

Specifically, the separation flash system 2 operates as follows:

gas from the gas collection system 1 is subjected to gas-liquid separation in the separation cavity, the separated liquid is sent to a sewage system 6, and the separated natural gas is sent to an external transportation system 3;

the incoming gas of the emptying system 4 is connected into a flash chamber of the double-barrel separation flash tank 201, liquid in the emptying gas is separated in the flash chamber, the separated liquid is sent to a blowdown system 6, and the separated emptying gas is sent to an emptying torch;

the flash evaporation safety valve 204 is a safety valve, when the pressure of the flash evaporation cavity exceeds the set value of the safety valve, the flash evaporation safety valve 204 is automatically opened, and the gas in the flash evaporation cavity is discharged to a discharge torch through the flash evaporation safety valve 204;

water is injected into the water seal cylinder 206 through the internal thread gate valve 205, so that the tempering of the emptying torch is prevented;

when the device is overhauled and washed, all the inlet and outlet valves are closed, the ball valve 207 with the 8-shaped blind plate is opened, and the washing water in the container is discharged.

Fifth embodiment:

on the basis of the fourth embodiment, there are two types of the external delivery systems 3, namely an external delivery system a and an external delivery system B, and the external delivery system a will be described in detail below:

referring to fig. 5, the external transportation system a includes an external transportation pipeline, an inlet pipe orifice of the external transportation pipeline is communicated with the separation cavity of the dual-drum separation flash tank 201, an outlet pipe orifice of the external transportation pipeline is divided into two paths, one path of the two paths of the external transportation pipeline conveys natural gas to downstream, and the other path of the two paths of the external transportation pipeline conveys natural gas to the self-gas consumption system 5;

the first external electric three-way valve 301, the check valve 302, the second external electric three-way valve 303, the first external manual ball valve 304, the pipe cleaner 305 and the second external manual ball valve 306 are sequentially arranged on the external pipeline from upstream to downstream, a third pipe orifice of the first external electric three-way valve 301 is connected with an inlet of a natural gas pressurizing or dehydrating device outside the integrated device through a pipeline, and an outlet of the natural gas pressurizing or dehydrating device is communicated with a third pipe orifice of the second external electric three-way valve 303 through a pipeline;

the external transportation system 3 further comprises a branch pipeline connected in parallel with the external transportation pipeline, one end of the branch pipeline is connected into the external transportation pipeline between the second external transportation electric three-way valve 303 and the first external transportation manual ball valve 304, the other end of the branch pipeline is connected into the external transportation pipeline at the downstream of the second external transportation manual ball valve 306, the branch pipeline is sequentially provided with a third external transportation manual ball valve 307, an orifice plate flowmeter 308 and a fourth external transportation manual ball valve 309 along the transportation direction of natural gas, and the external transportation pipeline at the downstream of the fourth external transportation manual ball valve 309 is provided with a pressure remote transmission device 310.

The first output electric three-way valve 301 and the second output electric three-way valve 303 both have the function of switching processes, and the functions are as follows:

when the pressure of the incoming gas of the separation flash system 2 is low or dehydration is needed, the natural gas is pressurized or dehydrated through an external electric three-way valve 301 to a natural gas treatment device (the prior art does not explain in detail) outside the device, and the treated natural gas is connected to the device through an external electric three-way valve 303;

when pressurization or dehydration is not needed, the gas coming from the separation flash system 2 passes through a first output electric three-way valve 301 to a check valve 302, and passes through a second output electric three-way valve 303 to a first output manual ball valve 304 or a third output manual ball valve 307;

when pipe cleaning is needed, closing the third output manual ball valve 307 and the fourth output manual ball valve 309, and enabling incoming gas to pass through the first output manual ball valve 304, the pipe cleaner 305 and the second output manual ball valve 306 to the downstream;

when the cleaning is not needed, the first output manual ball valve 304 and the second output manual ball valve 306 are closed, incoming gas passes through the third output manual ball valve 307, the orifice plate flow meter 308 and the fourth output manual ball valve 309 to the downstream, and a branch pipe is led out from a downstream pipeline and serves as a gas source of the self-gas system 5.

Sixth embodiment:

as an alternative to the export system a, referring to fig. 6, the export system B includes an export pipeline, an inlet pipe orifice of the export pipeline is communicated with the separation cavity of the dual-drum separation flash tank 201, an outlet pipe orifice of the export pipeline is divided into two paths, one path of the export pipeline delivers natural gas to the downstream, and the other path delivers natural gas to the self-gas-using system 5;

an external electric three-way valve 301, a check valve 302, an external electric three-way valve 303 and an external manual ball valve 304 are sequentially arranged on an external pipeline from upstream to downstream, a third pipe orifice of the external electric three-way valve 301 is connected with an inlet of a natural gas supercharging or dehydrating device outside the integrated device through a pipeline, and an outlet of the natural gas supercharging or dehydrating device is communicated with a third pipe orifice of the external electric three-way valve 303 through a pipeline;

the external transportation system 3 further comprises a branch pipeline connected with the external transportation pipeline in parallel, one end of the branch pipeline is connected to an inlet of the first external transportation manual ball valve 304, the other end of the branch pipeline is connected to an outlet of the first external transportation manual ball valve 304, the branch pipeline is sequentially provided with a third external transportation manual ball valve 307, an orifice plate flowmeter 308 and a fourth external transportation manual ball valve 309 along the transportation direction of natural gas, and a pressure remote transmission device 310 is installed on the external transportation pipeline at the downstream of the fourth external transportation manual ball valve 309.

when the external output is measured normally, the first external output manual ball valve 304 is closed, and the incoming gas flows downstream through a third external output manual ball valve 307, an orifice plate flowmeter 308 and a fourth external output manual ball valve 309;

when the flow meter is overhauled, the third output manual ball valve 307 and the fourth output manual ball valve 309 are closed, incoming gas passes through the first output manual ball valve 304 to the downstream, and a branch pipe is led out from a downstream pipeline and serves as a gas source of the self-gas system 5.

The seventh embodiment:

the self-gas-using system 5 has two schemes, namely a self-gas-using system a and a self-gas-using system B, and the self-gas-using system a is described in detail below:

the self-gas-using system A comprises a self-gas-using pipeline, referring to FIG. 9, a gas inlet pipe orifice of a self-gas-using pipeline is communicated with a gas outlet pipe orifice of an external transmission pipeline, the self-gas-using pipeline is divided into two paths after passing through a self-gas-using electric ball valve I501, one path of the self-gas-using pipeline is sequentially provided with a high-sealing sampling stop valve II 502 with a pressure gauge and a control valve thereof, a self-gas-using manual ball valve I503, a T-shaped filter I504, a gas pressure regulator I505 and a self-gas-using manual ball valve II 506 along the natural gas transmission direction, and the other path of the self-gas-using manual ball valve II 507, a T-shaped filter II 508, a gas pressure regulator II 509, a self-gas-using manual ball valve;

two pipelines are respectively converged at the outlet of a self-used gas manual ball valve II 506 and the outlet of a high-seal sampling stop valve III 511 with a pressure gauge and a control valve thereof, an intelligent precession flowmeter 512, a pressure temperature detection valve group II 513 and a gas-liquid separator 519 are sequentially installed on the converged pipeline along the natural gas conveying direction, the gas-liquid separator 519 is provided with a self-used gas manual ball valve IV 514 with a pressure gauge and a control valve thereof and an on-site liquid level display meter 520, a liquid discharge pipeline of the gas-liquid separator 519 is connected in series with a self-used gas manual ball valve V518, and the top end of the gas-liquid separator 519 is provided with two pipelines, wherein one pipeline conveys natural gas to a torch through a self-used gas manual ball valve VI 515 and an electromagnetic valve 516 to be used as fuel gas, and the other pipeline conveys natural gas;

and a pipeline between the intelligent precession flowmeter 512 and the self-used pneumatic manual ball valve II 506, or a pipeline between the intelligent precession flowmeter 512 and the high-sealing sampling stop valve III 511 with the pressure gauge and the control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected to the emptying system 4.

The working principle of the gas system a in the present embodiment is as follows:

the gas source of the self-gas-using system is from an external delivery system 3, the incoming gas is divided into two paths after passing through a self-gas-using electric ball valve 501, (a self-gas-using manual ball valve 503+ a T-shaped filter 504+ a gas pressure regulator 505+ a self-gas-using manual ball valve 506) and (a self-gas-using manual ball valve three 507+ a T-shaped filter two 508+ a gas pressure regulator two 509+ a self-gas-using manual ball valve four 510), the two paths are mutually standby, a vent pipeline is arranged on the pipeline after the two paths are converged, the vent pipeline is subjected to pressure regulation and then is connected to an intelligent precession flowmeter 512, a pressure and temperature detection valve set two 513 is arranged behind the intelligent precession flowmeter 512, temperature and pressure data are transmitted to a PLC7, the natural gas is transmitted to a gas-liquid separator 519, liquid in the gas is separated, and then divided into two paths;

the gas-liquid separator 519 is provided with a sewage line, and when liquid drainage is needed, the self-pneumatic manual ball valve five 518 is opened.

Eighth embodiment:

as an alternative scheme of the self-gas-using system a, the self-gas-using system B comprises a self-gas-using pipeline, referring to fig. 10, an inlet pipe orifice of the self-gas-using pipeline is communicated with an outlet pipe orifice of an external transmission pipeline, the self-gas-using pipeline is divided into two paths after passing through a first self-gas-using electric ball valve 501, one path of the two paths is sequentially provided with a second self-gas-using manual ball valve 507, a second self-gas-using manual ball valve 502, a first self-gas-using manual ball valve 503, a first T-shaped filter 504, a first gas pressure regulator 505 and a second self-gas-using manual ball valve 506 along the natural gas transmission direction, and the other path is sequentially provided with a third self-gas-using manual ball valve 507, a second T-shaped filter 508, a second gas pressure regulator 509, a fourth self;

the two pipelines are respectively converged at the outlet of a self-gas manual ball valve II 506 and the outlet of a high-sealing sampling stop valve III 511 with a pressure gauge and a control valve thereof, the converged pipelines are connected to a gas-liquid separator 519, the gas-liquid separator 519 is provided with a high-sealing sampling stop valve IV 514 with a pressure gauge and a control valve thereof and an on-site liquid level display meter 520, an intelligent vortex flowmeter 512 and a pressure and temperature detection valve group II 513 are sequentially arranged on a gas transmission pipeline at the top end of the gas-liquid separator 519 along the natural gas transmission direction, the gas transmission pipeline is divided into two pipelines at the outlet of the pressure and temperature detection valve group II 513, one pipeline transmits natural gas to a torch as fuel gas through a self-gas manual ball valve VI 515 and an electromagnetic valve 516, and the other pipeline transmits the natural gas to a generator as fuel;

and a pipeline between the gas-liquid separator 519 and the self-gas manual ball valve II 506, or a pipeline between the gas-liquid separator 519 and the high-sealing sampling stop valve III 511 with a pressure gauge and a control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected to an emptying system 4.

The working principle of the gas system B in the present embodiment is as follows:

the gas source of the self-gas system comes from an external delivery system 3, the incoming gas is divided into two paths after passing through a self-gas electric ball valve 501, (a self-gas manual ball valve 503+ a T-shaped filter 504+ a gas pressure regulator 505+ a self-gas manual ball valve 506) and (a self-gas manual ball valve 507+ a T-shaped filter 508+ a gas pressure regulator 509+ a self-gas manual ball valve 510), the two paths are mutually standby, a vent pipeline is arranged on the pipeline after the two paths are converged, the vent pipeline is subjected to pressure regulation and then enters a gas-liquid separator 519, liquid in the gas is separated and measured by an intelligent precession flowmeter 512, a pressure and temperature detection valve group 513 is arranged behind the intelligent precession flowmeter 512, temperature and pressure data are uploaded to a PLC7, and then divided into two paths, or the gas is used as fuel gas to a torch, or is used as fuel gas to a generator;

Ninth embodiment:

the venting system 4 has two schemes, namely a venting system a and a venting system B, and the venting system a will be described in detail below:

referring to fig. 7, the venting system a is composed of a venting line of the gas collecting system 1 and a venting line of the self-service gas system 5;

the gas collection manifold 101 of the gas collection system 1 is provided with two emptying pipelines, wherein one emptying pipeline conveys emptying natural gas into a flash chamber of the double-cylinder separation flash tank 201 through an electric ball valve 403 and a throttling stop emptying valve II 402, and the other emptying pipeline conveys emptying natural gas into the flash chamber of the double-cylinder separation flash tank 201 through a manual ball valve 405 and a safety valve I404;

third pipe orifices of all electric three-way valves 104 of the gas collection system 1 are cut to an emptying valve I401 through throttling to convey emptying natural gas to a flash chamber of the double-barrel separation flash tank 201;

two parallel emptying pipelines of the self-gas system 5, wherein one emptying pipeline conveys emptying natural gas to a flash chamber of the double-cylinder separation flash tank 201 through a throttling stop emptying valve III 406, and the other emptying pipeline conveys emptying natural gas to the flash chamber of the double-cylinder separation flash tank 201 through a manual ball valve II 407 and a safety valve II 408;

the vented natural gas of other devices except the integrated device is connected into the flash chamber of the double-cylinder separation flash tank 201.

The operation principle of the emptying system a of the embodiment is as follows:

when the gas collection electric three-way valve 104 of the gas collection system is emptied, the emptying gas of the gas collection system is connected to an emptying pipeline to the flash chamber of the double-cylinder separation flash tank 201 through a throttling stop to an emptying valve I401, and meanwhile, the emptying gas outside the receiving device is sent to the double-cylinder separation flash tank 201;

when the gas collection manifold 101 of the gas collection system 1 is emptied, remotely opening the electric ball valve 403, and emptying gas is connected to an emptying pipeline through the electric ball valve 403 and the throttling stop emptying valve II 402;

when the pressure of the device is ultrahigh, a third throttling stop emptying valve 406 is a normally open valve, a first safety valve 404 automatically jumps, and emptying gas is connected to an emptying system;

when the self-gas system 5 is emptied, a third throttling stop emptying valve 406 is manually opened, emptying gas is connected into the emptying system, when the pressure of a pressure regulating valve of the self-gas system 5 is ultrahigh, a first safety valve 404 automatically jumps, emptying gas is connected into the emptying system, and a second manual ball valve 407 is a normally open valve.

Tenth embodiment:

referring to fig. 8, the vent system B is composed of a vent line of the gas collecting system 1 and a vent line of the self-service gas system 5;

the gas collection manifold 101 of the gas collection system 1 is provided with two emptying pipelines, wherein one emptying pipeline conveys emptying natural gas to a flash chamber of the double-cylinder separation flash tank 201 through an electric ball valve 403 and a throttling stop emptying valve II 402, and the other emptying pipeline conveys emptying natural gas to the flash chamber of the double-cylinder separation flash tank 201 through a manual ball valve I405 and a safety valve I404;

When the gas collection system B is emptied, remotely opening the electric ball valve 403, and accessing the emptied gas into an emptying pipeline through the electric ball valve 403 and the second throttling stop emptying valve 402;

when the pressure of the device is ultrahigh, the manual ball valve I405 is a normally open valve, the safety valve I404 automatically jumps, and the emptying gas is connected to an emptying system;

when the self-gas system 5 is emptied, the second manual ball valve 407 is manually opened, the emptied gas is connected to the emptying system, when the pressure of the pressure regulating valve of the self-gas system 5 is ultrahigh, the second safety valve 408 automatically jumps, the emptied gas is connected to the emptying system, and the second manual ball valve 407 is a normally open valve.

Eleventh embodiment:

the sewage system 6 has three schemes, namely a sewage system a, a sewage system B and a sewage system C, which will be described in detail below:

referring to fig. 11, the sewage system a is divided into two parts, namely a separation cavity sewage pipe and a flash evaporation cavity sewage pipe;

one end of a separation cavity sewage discharge pipe is communicated with a separation cavity of the double-barrel separation flash tank 201, the other end of the separation cavity sewage discharge pipe is divided into two pipelines, one pipeline is used for emergency liquid discharge, a first sewage discharge manual ball valve 601, an electric regulating valve 602 and a first sewage discharge electric ball valve 603 are sequentially arranged on the emergency liquid discharge pipeline along the medium flowing direction, the other pipeline is used for normal liquid discharge, a second sewage discharge manual ball valve 604, a first drain valve 605 and a first sewage discharge stop valve 606 are sequentially arranged on the normal liquid discharge pipeline along the medium flowing direction, the first sewage discharge stop valve 606 is connected with a third sewage discharge manual ball valve 607 in parallel and is used as a bypass valve, and the;

normally, a normal liquid drainage pipeline is used, when the liquid volume is large, the emergency liquid drainage pipeline is opened, and two pipelines drain liquid simultaneously.

One end of a flash cavity blow-off pipe is communicated with a flash cavity of the double-barrel separation flash tank 201, the other end of the flash cavity blow-off pipe is divided into two pipelines which are mutually standby, wherein one pipeline is sequentially provided with a blow-off electric ball valve II 608 and a blow-off manual ball valve IV 609 along the medium flowing direction, the other pipeline is sequentially provided with a blow-off electric ball valve III 610 and a blow-off electric ball valve IV 611 along the medium flowing direction, and the two pipelines are finally respectively introduced into a sewage treatment facility;

the liquid discharge of the flash evaporation cavity is divided into two paths, the two paths are mutually standby, and when the liquid volume is large, the two paths discharge liquid simultaneously.

The twelfth embodiment:

referring to fig. 12, the sewage system B is divided into two parts, namely a separation cavity sewage pipe and a flash evaporation cavity sewage pipe;

one end of the separating cavity sewage discharge pipe is communicated with the separating cavity of the double-cylinder separating flash tank 201, the other end is divided into two pipelines, one pipeline is taken as emergency liquid drainage, a first sewage drainage manual ball valve 601, an electric regulating valve 602 and a first sewage drainage electric ball valve 603 are sequentially arranged on the emergency liquid drainage pipeline along the medium flowing direction, the first sewage drainage electric ball valve 603 is communicated with a sewage treatment facility through a pipeline, the other pipeline is taken as normal liquid drainage, a second sewage drainage manual ball valve 604, a first drain valve 605 and a second sewage drainage stop valve 606 are sequentially arranged on the normal liquid drainage pipeline along the medium flowing direction, the second sewage drainage stop valve 606 is communicated into a flash chamber of the double-barrel separation flash tank 201 through a pipeline, the third sewage drainage stop valve 606 is connected with a third sewage drainage manual ball valve 607 in parallel to serve as a bypass valve, and sewage pipelines of other devices except the integrated device are communicated into the flash chamber of the double-barrel separation flash;

when the liquid volume is bigger, emergent drainage pipeline opens, connects to the outer sewage treatment facility of device.

One end of a flash cavity drain pipe is communicated with a flash cavity of the double-barrel separation flash tank 201, the other end of the flash cavity drain pipe is divided into two pipelines which are mutually standby, wherein one pipeline is sequentially provided with a fourth blowdown manual ball valve 609, a second drain valve 613 and a sixth blowdown manual ball valve 614 along the medium flowing direction, the sixth blowdown manual ball valve 614 is connected with a seventh blowdown manual ball valve 615 in parallel to serve as a bypass valve, the other pipeline is sequentially provided with a third blowdown electric ball valve 610 and a fourth blowdown electric ball valve 611 along the medium flowing direction, and the two pipelines are finally respectively communicated with a sewage treatment facility;

The thirteenth embodiment:

referring to fig. 13, the sewage system C is divided into two parts, namely a separation cavity sewage pipe and a flash evaporation cavity sewage pipe;

one end of a separation cavity sewage discharge pipe is communicated with a separation cavity of the double-barrel separation flash tank 201, the other end of the separation cavity sewage discharge pipe is divided into two pipelines, one pipeline is used for emergency liquid discharge, a sewage discharge manual ball valve eight 616 and a sewage discharge electric ball valve five 617 are sequentially arranged on the emergency liquid discharge pipeline along the medium flowing direction, the other pipeline is used for normal liquid discharge, a sewage discharge manual ball valve I601, an electric regulating valve 602 and a sewage discharge electric ball valve I603 are sequentially arranged on the normal liquid discharge pipeline along the medium flowing direction, and the two pipelines are merged and then introduced into a sewage treatment facility;

the two paths are mutually standby, and when the liquid volume is large, the two paths drain liquid simultaneously.

The drain valve in the sewage system 6 is provided with a quick-opening blind plate and is provided with an overhaul sand outlet, the processing medium is natural gas and field produced water, and the applicable pressure is medium-low pressure.

It should be noted that the integrated device for gas collection of natural gas, which is protected by the present invention, may have various configurations, for example:

(1) gas collection system A, separation and flash evaporation system, output system A, emptying system A, gas utilization system A, blowdown system A and intelligent control system.

(2) Gas collection system A, separation and flash evaporation system, output system A, emptying system A, gas utilization system A, blowdown system B and intelligent control system.

(3) Gas collection system A, separation and flash evaporation system, output system A, emptying system A, gas utilization system A, blowdown system C and intelligent control system.

(4) Gas collection system A, separation and flash evaporation system, output system B, emptying system A, gas utilization system A, blowdown system A and intelligent control system.

(5) Gas collection system A, separation and flash evaporation system, output system B, emptying system A, gas utilization system A, blowdown system B and intelligent control system.

(6) Gas collection system A, separation and flash evaporation system, output system B, emptying system A, gas utilization system A, blowdown system C and intelligent control system.

(7) Gas collection system B, separation and flash evaporation system, output system A, emptying system B, gas utilization system A, blowdown system A and intelligent control system.

(8) Gas collection system B, separation and flash evaporation system, output system A, emptying system B, gas utilization system A, blowdown system B and intelligent control system.

(9) Gas collection system B, separation and flash evaporation system, output system A, emptying system B, gas utilization system B, blowdown system A and intelligent control system.

(10) Gas collection system B, separation and flash evaporation system, output system A, emptying system B, gas utilization system B, blowdown system B and intelligent control system.

(11) Gas collection system B, separation and flash evaporation system, output system B, emptying system B, gas utilization system A, blowdown system A and intelligent control system.

(12) Gas collection system B, separation and flash evaporation system, output system B, emptying system B, gas utilization system A, blowdown system B and intelligent control system.

(13) Gas collection system B, separation and flash evaporation system, output system B, emptying system B, gas utilization system B, blowdown system A and intelligent control system.

(14) Gas collection system B, separation and flash evaporation system, output system B, emptying system B, gas utilization system B, blowdown system B and intelligent control system.

The system is not limited to the above, and the systems can be combined to form an integrated device by themselves according to needs, and valves in the systems can be connected with a PLC, but can be set manually or automatically.

The valves in all of the above embodiments are commercially available.

The PLC is connected with each control point of the device through an instrument cable to complete the detection and remote transmission of the temperature and pressure of the natural gas in the pipeline of the device, the display and monitoring of the state of a valve and the like, and the PLC can realize the remote emergency cut-off, remote emptying and safe emptying of the inlet of the device; detecting and remotely transmitting the inlet and outlet temperature and pressure of the device; the separator automatically discharges liquid and remotely discharges liquid in emergency; remotely monitoring the running state of the three-way valve and switching the process; the fuel gas automatic pressure regulation, overpressure cut-off, long-range urgent cut-off, the automatic measurement of the flowrate; the flow of the exported natural gas is automatically measured; the device is remotely located; and reserving a mobile phone APP remote monitoring operation data interface.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. Integrated device suitable for natural gas collection, its characterized in that: the natural gas separation and recovery system comprises a gas collection system (1), a separation flash system (2) and an output system (3) which are sequentially communicated from upstream to downstream along the conveying direction of natural gas, wherein the output system (3) is provided with two output pipelines, one pipeline conveys the natural gas to the downstream, the other pipeline conveys the natural gas to a self-use gas system (5), the self-use gas system (5) is provided with two output pipelines, one pipeline conveys the natural gas to a torch and a generator, the other pipeline conveys the natural gas to a vent system (4), an input port of the vent system (4) is connected with the gas collection system (1) through a pipeline, an output port of the vent system (4) is connected to the separation flash system (2) through a pipeline, and the separation flash system (2) is connected with a sewage discharge system (6);

the integrated device also comprises a PLC (7), and the gas collection system (1), the separation flash evaporation system (2), the output system (3), the self-gas utilization system (5) and the sewage discharge system (6) are respectively connected with the PLC (7).

2. The integrated, integrated apparatus suitable for gas collection according to claim 1, wherein: the gas collection system (1) comprises a plurality of gas transmission pipelines, wherein the inlet of each gas transmission pipeline is connected to a well site for gas, the outlets of all the gas transmission pipelines are converged to a gas collection manifold (101) provided with a pressure and temperature detection valve group I (103), the gas collection manifold (101) is communicated with the separation flash system (2) through a pipeline, and the pipeline is provided with a high-sealing sampling stop valve I (102) with a pressure gauge and a control valve thereof;

each gas transmission pipeline is connected with a gas collection electric three-way valve (104) in series, and a third pipe orifice of the gas collection electric three-way valve (104) is connected to the emptying system (4) through a pipeline.

3. The integrated, integrated apparatus for gas collection as recited in claim 2, wherein: the separation flash system (2) comprises a double-drum separation flash tank (201), a remote transmission liquid level transmitter (202) and a pressure on-site display and remote transmission device (203) are installed on a tank body of the separation flash tank, and the double-drum separation flash tank (201) consists of a separation cavity and a flash cavity;

gas coming from the gas collection system (1) is connected into the separation cavity for gas-liquid separation, the separated natural gas is conveyed to the external transportation system (3) through a pipeline, and the separated liquid is conveyed to the sewage discharge system (6) through the pipeline;

the incoming gas of the emptying system (4) is connected into a flash evaporation cavity for gas-liquid separation, the separated natural gas is output in two paths, one path of the natural gas passes through a water seal cylinder (206) to a torch, the other path of the natural gas passes through a safety valve (204) to the torch, an internal thread gate valve (205) for water injection is installed at the inlet end of the water seal cylinder (206), and the separated liquid passes through a pipeline to a sewage discharge system (6);

the tank bottom of the separation cavity and the tank bottom of the flash evaporation cavity are respectively connected with a pipeline, and a ball valve (207) with an 8-shaped blind plate is connected on the pipeline in series.

4. The integrated, integrated apparatus for gas collection as recited in claim 3, wherein: the external transportation system (3) comprises an external transportation pipeline, an air inlet pipe orifice of the external transportation pipeline is communicated with a separation cavity of the double-cylinder separation flash tank (201), an air outlet pipe orifice of the external transportation pipeline is divided into two paths, wherein one path of the external transportation pipeline conveys natural gas to the downstream, and the other path of the external transportation pipeline conveys the natural gas to the self-gas-using system (5);

the first external electric three-way valve (301), the check valve (302), the second external electric three-way valve (303), the first external manual ball valve (304), the pipe cleaner (305) and the second external manual ball valve (306) are sequentially arranged on an external pipeline from upstream to downstream, a third pipe orifice of the first external electric three-way valve (301) is connected with an inlet of a natural gas pressurization or dehydration device outside the integrated device through a pipeline, and an outlet of the natural gas pressurization or dehydration device is communicated with a third pipe orifice of the second external electric three-way valve (303) through a pipeline;

the external conveying system (3) further comprises a branch pipeline connected with the external conveying pipeline in parallel, one end of the branch pipeline is connected into the external conveying pipeline between the external conveying electric three-way valve II (303) and the external conveying manual ball valve I (304), the other end of the branch pipeline is connected into the external conveying pipeline on the downstream of the external conveying manual ball valve II (306), along the conveying direction of natural gas, the branch pipeline is sequentially provided with an external conveying manual ball valve III (307), a pore plate flowmeter (308) and an external conveying manual ball valve IV (309), and the external conveying pipeline on the downstream of the external conveying manual ball valve IV (309) is provided with a pressure remote transmission device (310).

5. The integrated, integrated apparatus for gas collection as recited in claim 4, wherein: the self-gas system (5) comprises a self-gas pipeline, an air inlet pipe orifice of the self-gas pipeline is communicated with an air outlet pipe orifice of an external transmission pipeline, the self-gas pipeline is divided into two paths after passing through a first self-gas electric ball valve (501), one path is sequentially provided with a second self-gas manual ball valve (507), a second control valve high-sealing sampling stop valve (502), a first self-gas manual ball valve (503), a first T-shaped filter (504), a first gas pressure regulator (505) and a second self-gas manual ball valve (506) along the natural gas transmission direction, and the other path is sequentially provided with a third self-gas manual ball valve (507), a second T-shaped filter (508), a second gas pressure regulator (509), a fourth self-gas manual ball valve (510) and a third self-gas sampling stop valve (511) with a pressure gauge and a control valve high-;

two pipelines are respectively converged at the outlet of a self-used pneumatic manual ball valve II (506) and the outlet of a high-sealing sampling stop valve III (511) with a pressure gauge and a control valve thereof, an intelligent precession flow meter (512), a pressure and temperature detection valve group II (513) and a gas-liquid separator (519) are sequentially installed on the converged pipeline along the natural gas conveying direction, a high-sealing sampling stop valve IV (514) with a pressure gauge and a control valve thereof and an on-site liquid level display meter (520) are installed on the gas-liquid separator (519), the liquid drainage pipeline of the gas-liquid separator (519) is connected in series with a self-gas manual ball valve five (518), the top end of the gas-liquid separator (519) is provided with two gas outlet pipelines, one gas transmission pipeline transmits natural gas to a torch through a self-gas manual ball valve six (515) and an electromagnetic valve (516) to be used as fuel gas, and the other gas transmission pipeline transmits natural gas to a generator through a self-gas manual ball valve seven (517) to be used as fuel gas;

and a pipeline between the intelligent precession flowmeter (512) and the self-used pneumatic manual ball valve II (506), or a pipeline between the intelligent precession flowmeter (512) and the high-sealing sampling stop valve III (511) with the pressure gauge and the control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected into an emptying system (4).

6. The integrated, integrated apparatus for gas collection as recited in claim 4, wherein: the self-gas system (5) comprises a self-gas pipeline, an air inlet pipe orifice of the self-gas pipeline is communicated with an air outlet pipe orifice of an external transmission pipeline, the self-gas pipeline is divided into two paths after passing through a first self-gas electric ball valve (501), one path is sequentially provided with a second self-gas manual ball valve (507), a second control valve high-sealing sampling stop valve (502), a first self-gas manual ball valve (503), a first T-shaped filter (504), a first gas pressure regulator (505) and a second self-gas manual ball valve (506) along the natural gas transmission direction, and the other path is sequentially provided with a third self-gas manual ball valve (507), a second T-shaped filter (508), a second gas pressure regulator (509), a fourth self-gas manual ball valve (510) and a third self-gas sampling stop valve (511) with a pressure gauge and a control valve high-;

two pipelines are respectively converged at an outlet of a self-gas manual ball valve II (506) and an outlet of a high-seal sampling stop valve III (511) with a pressure gauge and a control valve thereof, the converged pipelines are connected into a gas-liquid separator (519), a high-seal sampling stop valve IV (514) with a pressure gauge and a control valve thereof and an on-site liquid level display meter (520) are installed on the gas-liquid separator (519), an intelligent precession flowmeter (512) and a pressure and temperature detection valve group II (513) are sequentially installed on a gas pipeline at the top end of the gas-liquid separator (519) along the conveying direction of natural gas, the gas pipeline is divided into two pipelines at the outlet of the pressure and temperature detection valve group II (513), wherein one pipeline conveys natural gas to a torch through a self-gas manual ball valve VI (515) and an electromagnetic valve (516) to serve as fuel gas, and the other pipeline conveys natural gas to a generator through a;

and a pipeline between the gas-liquid separator (519) and the self-used gas manual ball valve II (506), or a pipeline between the gas-liquid separator (519) and the high-seal sampling stop valve III (511) with the pressure gauge and the control valve thereof is communicated with two emptying pipelines connected in parallel, and the emptying pipelines are connected into an emptying system (4).

7. Integrated device suitable for gas collection of natural gas according to claim 5 or 6, characterized in that: the emptying system (4) consists of an emptying pipeline of the gas collection system (1) and an emptying pipeline of the self-use gas system (5);

a gas collection header (101) of the gas collection system (1) is provided with two paths of emptying pipelines, wherein one path of emptying pipeline is used for conveying emptying natural gas to a flash chamber of the double-cylinder separation flash tank (201) through a manual ball valve I (405) and a safety valve I (404), and the other path of emptying pipeline is used for conveying emptying natural gas to the flash chamber of the double-cylinder separation flash tank (201) through an electric ball valve (403) and a throttling stop emptying valve II (402);

third pipe orifices of all electric three-way valves (104) of the gas collection system (1) are cut to a first emptying valve (401) through throttling to convey emptying natural gas to a flash chamber of the double-barrel separation flash tank (201);

two paths of emptying pipelines which are connected in parallel are arranged in the self-gas system (5), wherein one path of emptying pipeline conveys emptying natural gas to a flash chamber of the double-cylinder separation flash tank (201) through a throttling stop emptying valve III (406), and the other path of emptying pipeline conveys emptying natural gas to the flash chamber of the double-cylinder separation flash tank (201) through a manual ball valve II (407) and a safety valve II (408);

the vented natural gas of other devices except the integrated device is connected into a flash chamber of the double-cylinder separation flash tank (201).

8. The integrated, integrated apparatus for gas collection as recited in claim 3, wherein: the sewage discharge system (6) is divided into two parts, namely a separation cavity sewage discharge pipe and a flash evaporation cavity sewage discharge pipe;

one end of a separation cavity blow-off pipe is communicated with a separation cavity of a double-barrel separation flash tank (201), the other end of the separation cavity blow-off pipe is divided into two pipelines, one pipeline is used for emergency liquid drainage, a first blow-off manual ball valve (601), an electric regulating valve (602) and a first blow-off electric ball valve (603) are sequentially arranged on the emergency liquid drainage pipeline along the medium flowing direction, the other pipeline is used for normal liquid drainage, a second blow-off manual ball valve (604), a first drain valve (605) and a blow-off stop valve (606) are sequentially arranged on the normal liquid drainage pipeline along the medium flowing direction, a third blow-off manual ball valve (607) is connected in parallel with the blow-off stop valve (606) and used as;

one end of the flash cavity blow-off pipe is communicated with a flash cavity of the double-cylinder separation flash tank (201), the other end of the flash cavity blow-off pipe is divided into two pipelines which are mutually standby, one pipeline is sequentially provided with a second blow-off electric ball valve (608) and a fourth blow-off manual ball valve (609) along the medium flowing direction, the other pipeline is sequentially provided with a third blow-off electric ball valve (610) and a fourth blow-off electric ball valve (611) along the medium flowing direction, and the two pipelines are finally respectively introduced into a sewage treatment facility.

9. The integrated, integrated apparatus for gas collection as recited in claim 3, wherein: the sewage discharge system (6) is divided into two parts, namely a separation cavity sewage discharge pipe and a flash evaporation cavity sewage discharge pipe;

one end of the separating cavity sewage discharge pipe is communicated with the separating cavity of the double-cylinder separating flash tank (201), the other end is divided into two pipelines, wherein one pipeline is used for emergency liquid drainage, a first sewage drainage manual ball valve (601), an electric regulating valve (602) and a first sewage drainage electric ball valve (603) are sequentially arranged on the emergency liquid drainage pipeline along the medium flowing direction, the first blowdown electric ball valve (603) is communicated to a sewage treatment facility through a pipeline, the other pipeline is used for normal liquid drainage, a second blowdown manual ball valve (604), a first drain valve (605) and a blowdown stop valve (606) are sequentially arranged on the normal liquid drainage pipeline along the medium flowing direction, the blowdown stop valve (606) is communicated into a flash chamber of the double-barrel separation flash tank (201) through a pipeline, the blowdown stop valve (606) is connected with a blowdown manual ball valve III (607) in parallel, and sewage pipelines of other devices except the integrated device are communicated into a flash chamber of the double-barrel type separation flash tank (201) through a blowdown manual ball valve V (612);

one end of a blow-off pipe of the flash cavity is communicated with the flash cavity of the double-barrel separation flash tank (201), the other end of the blow-off pipe of the flash cavity is divided into two pipelines which are mutually standby, one pipeline is sequentially provided with a fourth blowdown manual ball valve (609), a second drain valve (613) and a sixth blowdown manual ball valve (614) along the medium flowing direction, the second drain valve (613) is connected with a seventh blowdown manual ball valve (615) in parallel and serves as a bypass valve, the other pipeline is sequentially provided with a third blowdown electric ball valve (610) and a fourth blowdown electric ball valve (611) along the medium flowing direction, and the two pipelines are finally respectively communicated with a sewage treatment facility.

10. The integrated, integrated apparatus for gas collection as recited in claim 3, wherein: the sewage discharge system (6) is divided into two parts, namely a separation cavity sewage discharge pipe and a flash evaporation cavity sewage discharge pipe;

one end of a separation cavity sewage discharge pipe is communicated with a separation cavity of the double-barrel separation flash tank (201), the other end of the separation cavity sewage discharge pipe is divided into two pipelines, one pipeline is used for emergency liquid discharge, a sewage discharge manual ball valve eight (616) and a sewage discharge electric ball valve five (617) are sequentially arranged on the emergency liquid discharge pipeline along the medium flowing direction, the other pipeline is used for normal liquid discharge, a sewage discharge manual ball valve I (601), an electric regulating valve (602) and a sewage discharge electric ball valve I (603) are sequentially arranged on the normal liquid discharge pipeline along the medium flowing direction, and the two pipelines are merged and then introduced into a sewage treatment facility;