CN110616096B - Integrated device for gas collection and treatment of natural gas - Google Patents
Integrated device for gas collection and treatment of natural gas Download PDFInfo
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- CN110616096B CN110616096B CN201910841598.XA CN201910841598A CN110616096B CN 110616096 B CN110616096 B CN 110616096B CN 201910841598 A CN201910841598 A CN 201910841598A CN 110616096 B CN110616096 B CN 110616096B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
Abstract
The invention discloses a natural gas collection and treatment integrated device, which comprises 4 modules, and adopts an upper and lower double-layer layout, wherein a condensate stabilizer and an air cooler in a first module, a natural gas inlet unit, a slug flow catcher and an alcohol injection pry A in a second module, a filtering separator, a sewage buffer tank and a sewage-to-water pump pry B in a third module, and a propane condensation evaporation pry and a low-temperature separator in a fourth module are respectively arranged on the upper layer of the integrated device; the three-phase separator and the pressure regulating valve group in the first module, the gas pressure regulating valve and the manifold in the second module, the precooling heat exchanger in the third module and the flow metering unit in the fourth module are respectively arranged at the lower layer of the integrated device, the device highly integrates related control function units for natural gas collection treatment in a double-layer structure, and embeds a small skid-mounted device designed according to functions into the device, so that the process flow is smooth, the structure space is compact, the occupied area is reduced, and the cost is saved.
Description
Technical Field
The invention relates to an integrated unit, in particular to a natural gas collection and treatment integrated device.
Background
In order to adapt to the actual conditions of rapid construction and low-cost development of gas fields, meet the characteristics of new block development, shorten the construction period, reduce the land area and improve the efficiency, a modularized integrated natural gas treatment plant needs to be constructed so as to meet the requirements of partition construction and step development.
The natural gas treatment plant is a framework station of a gas field, the process is complex, a process system of the natural gas treatment plant has the functions of gas collection, separation, deoiling and dehydration, pressurization, metering, fuel gas, alcohol injection, condensate stabilization and the like, and a conventional natural gas treatment plant generally has more than ten process unit device areas according to the requirements of the treatment process: the system comprises a clean pipe area, a gas collecting area, a deoiling and dehydrating area, an alcohol injection area, a gas distribution area, a fuel gas area, a condensate oil stabilizing area, a flash separation area, a gas distribution area, a fuel gas area, a pressurization area, a vent area and a torch area.
The treatment process is that the raw material natural gas comes from a clean pipe area, is separated and metered in a gas collecting area and then is subjected to filtration separation, precooling, propane refrigeration and low-temperature separation in a deoiling and dehydrating area, the major part of the separated purified natural gas is pressurized and de-pressurized and then is metered in a gas distribution area and then is output, and the minor part of the separated purified natural gas is conveyed to a fuel gas area and is metered by pressure regulation to meet the gas demand in a plant; conveying the sewage separated in the deoiling and dehydrating zone to a flash evaporation separation zone for liquid heat exchange, heating, separation, flash evaporation and other processes, and conveying the sewage to a condensate stabilization zone for treatment; the air released in the factory is connected to the venting and torch areas for gas separation and venting; the methanol injection zone injects methanol into the deoiling and dehydrating zone to prevent the pipeline from freezing and blocking.
In the construction process of the traditional natural gas treatment plant, as a plurality of process units are adopted, all devices, valves, pipe fittings and the like are required to be conveyed to a station in site construction, and then 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, and the method is not suitable for rapid construction and low-cost development of a gas field.
Disclosure of Invention
The invention aims to provide a natural gas collection and treatment integrated device which saves cost, reduces occupied area and accelerates construction progress.
The purpose of the invention is realized as follows:
the natural gas collection treatment integrated device comprises 4 modules, wherein each module adopts an upper layer layout and a lower layer layout, the 4 modules are respectively a first module, a second module, a third module and a fourth module, the first module comprises a condensate stabilizer, an air cooler, a three-phase separator and a pressure regulating valve group, the second module comprises a natural gas inlet unit, a slug flow catcher, an alcohol injection pry A, a gas pressure regulating valve and a manifold, the third module comprises a filtering separator, a sewage buffer tank, a precooling heat exchanger and a sewage transfer pump pry B, and the fourth module comprises a low-temperature separator, a propane condensation evaporation pry and a flow regulating valve;
each module adopts an upper and a lower double-layer layout, and specifically comprises the following steps:
a condensate stabilizing tower and an air cooler in the first module, a natural gas inlet unit, a slug flow catcher and an alcohol injection pry A in the second module, a filtering separator, a sewage buffer tank and a sewage transfer pump pry B in the third module, and a propane condensation evaporation pry and a low-temperature separator in the fourth module are respectively arranged on the upper layer of the integrated device; the three-phase separator and the pressure regulating valve bank in the first module, the gas pressure regulating valve and the manifold in the second module, the precooling heat exchanger in the third module and the flow regulating valve in the fourth module are respectively arranged at the lower layer of the integrated device;
the natural gas inlet unit comprises a first natural gas inlet pipeline and a second natural gas inlet pipeline, wherein an inlet of the first natural gas inlet pipeline is connected with a raw gas, an outlet of the first natural gas inlet pipeline is divided into two paths, one path of the first natural gas inlet pipeline is conveyed to a gas using point after passing through a gas pressure regulating valve and a manifold, the other path of the first natural gas inlet pipeline sequentially passes through a slug flow catcher and a filtering separator and then enters a precooling heat exchanger, product gas is separated through a propane condensation evaporation pry and a low-temperature separator, and the product gas is further subjected to heat exchange through the precooling heat exchanger and the propane condensation evaporation pry and then conveyed to a downstream block through a first natural gas outlet; the inlet of the second natural gas inlet pipeline is connected with the raw material gas, and the outlet of the second natural gas inlet pipeline is metered by the first natural gas flowmeter or the second natural gas flowmeter and then is conveyed to the downstream block through the second natural gas outlet pipeline;
the inlet of the alcohol injection pry A is connected with a methanol inlet pipeline, and the outlet of the alcohol injection pry A is respectively communicated with the precooling heat exchanger and the propane condensation evaporation pry;
an inlet of the condensate stabilizing tower is connected with an outlet of the low-temperature separator, at least three paths of outlets of the condensate stabilizing tower are arranged, and a first outlet of the condensate stabilizing tower and an outlet of the three-phase separator are converged by a pressure regulating valve bank and then conveyed to a downstream gas using point; a second outlet of the condensate stabilizing tower is connected with the three-phase separator to form a circulation loop; a third outlet of the condensate stabilizing tower is cooled by an air cooler and then is conveyed to a downstream device for storage through a condensate outlet pipeline;
the sewage inlet pipeline, the header, the slug flow catcher, the filtering separator, the propane condensation evaporation pry and the low-temperature separator are respectively communicated with the sewage buffer tank, and are conveyed to a downstream device through a third sewage outlet pipeline by the sewage transfer water pump pry B after being buffered by the sewage buffer tank.
Furthermore, the collecting pipe is connected with a gas utilization point through a first fuel gas outlet pipeline, a second fuel gas outlet pipeline and a third fuel gas outlet pipeline which are arranged in parallel.
Furthermore, the pressure regulating valve group comprises a first pressure regulating valve and a second pressure regulating valve, and the first pressure regulating valve is arranged between the outlet of the condensate stabilizing tower and the inlet of the third gas outlet pipeline; the second pressure regulating valve is arranged between the outlet of the three-phase separator and the inlet of the third fuel gas outlet pipeline.
Further, sewage at the bottoms of the slug flow catcher, the filtering separator, the precooling heat exchanger and the low-temperature separator is discharged to a sewage system through second sewage outlet pipelines respectively; and sewage at the bottoms of the condensate stabilizing tower and the three-phase separator is discharged to a sewage system through a first sewage outlet pipeline respectively.
Further, the outlets of the slug flow catcher, the filtering separator, the precooling heat exchanger, the low-temperature separator, the condensate stabilizing tower and the three-phase separator are all provided with safe emptying; specifically, emptying of the slug flow catcher is connected to a high-pressure emptying header pipe in the plant through a first natural gas emptying pipeline; and the emptying of the filtering separator, the emptying of the precooling heat exchanger, the emptying of the low-temperature separator, the emptying of the condensate stabilizer and the emptying of the three-phase separator are respectively connected to a high-pressure emptying header pipe in the plant through a fourth natural gas emptying pipeline.
Further, the flow metering unit comprises a first natural gas flowmeter and a second natural gas flowmeter which are arranged in parallel, the outlets of the first natural gas flowmeter and the second natural gas flowmeter are respectively provided with a safe emptying pipe, and specifically, the emptying pipe of the first natural gas flowmeter and the emptying pipe of the second natural gas flowmeter are connected into the high-pressure emptying header pipe in the plant through a fifth natural gas emptying pipeline after being converged.
Furthermore, safe emptying is arranged between the fuel gas pressure regulating valve and the header, and between the outlet of the sewage buffer tank and the outlet of the propane condensation evaporation pry;
specifically, safe emptying between the fuel gas pressure regulating valve and the header is connected to an in-plant low-pressure emptying system through a second natural gas emptying pipeline; and the emptying of the propane condensation evaporation pry and the emptying of the sewage buffer tank are merged and then are connected into a low-pressure emptying main pipe in the plant through a third natural gas emptying pipeline.
Further, the alcohol injection pry A comprises a first alcohol injection pump, a second alcohol injection pump and a third alcohol injection pump which are arranged in parallel, and outlets of the first alcohol injection pump, the second alcohol injection pump and the third alcohol injection pump are respectively provided with a first methanol emptying pipeline, a second methanol emptying pipeline and a third methanol emptying pipeline; and the emptying pipelines are respectively connected to the inlet header pipes of the corresponding alcohol injection pumps.
Further, the bottom of the three-phase separator is also connected with an alcohol-containing sewage outlet pipeline.
Further, the sewage-to-water pump pry B comprises a first water-to-water pump and a second water-to-water pump which are arranged in parallel.
Furthermore, the device is an upper layer frame structure and a lower layer frame structure which are welded by cross beams and stand columns, the lower layer frame structure comprises a plurality of stand columns which are anchored on the ground, the upper layer frame structure is paved into a platform by a steel grating, and the platform is connected with the lower layer stand columns into a whole by the cross beams and two operation walkways.
The distance between the upper layer and the lower layer is 3-5 m.
The invention has the following beneficial effects:
the integrated device for gas collection and treatment of natural gas is divided into 4 modules, and is arranged in a double-group double-layer manner, so that a gas collection area, a gas distribution area, a fuel gas area, a buffer tank area and a deoiling and dehydrating device area in a conventional treatment plant can be replaced, and 8 functions of raw gas collection, natural gas deoiling and dehydrating, methanol injection, produced liquid buffering, condensate flash evaporation, condensate stabilization, gas pressure regulation and gas distribution, product gas metering and the like in the conventional natural gas treatment plant are integrated. The device has the characteristics of smooth process flow and compact structure space, can meet the requirements of inspection and maintenance, reduces the occupied area of a treatment plant by about 51.2 percent compared with the occupied area of a conventional treatment plant, and shortens the construction period by 16.7 percent.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the implementation principle of the present invention.
Description of reference numerals:
1. a methanol inlet line; 2. a first natural gas vent line; 3. a first natural gas intake line; 4. a second natural gas vent line; 5. a first gas outlet line; 6. a second gas outlet line; 7. a third gas outlet line; 8. a sewage inlet pipeline; 9. a second natural gas intake line; 10. collecting pipes; 11. a gas pressure regulating valve; 12. a slug flow catcher; 13. a first alcohol injection pump; 14. a second alcohol injection pump; 15. a third alcohol injection pump; 16. a filtration separator; 17. a sewage buffer tank; 18. a precooling heat exchanger; 19. a cryogenic separator; 20. a first natural gas flowmeter; 21. a second natural gas flowmeter; 22. condensing, evaporating and prying propane; 23. a third natural gas emptying pipeline; 24. a first water pump is rotated; 25. a second water transfer pump, 26 and a condensate stabilizing tower; 27. a first pressure regulating valve; 28. a second pressure regulating valve; 29. a three-phase separator; 30. an air cooler; 31. a flow regulator; 32. a fourth natural gas vent line; 33. an alcohol-containing wastewater outlet line; 34. a first sewage outlet line; 35. a first natural gas outlet line; 36. a second sewage outlet line; 37. a condensate outlet line; 38. a third effluent outlet line; 39. a fifth natural gas vent line; 40. a second natural gas outlet line; 41. a first methanol vent line; 42. a second methanol vent line; 43. a third methanol vent line;
a-alcohol injection pry and B-water transfer pry.
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 natural gas collecting and processing device described in this specification.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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.
First embodiment
The first embodiment of the invention relates to, as shown in fig. 1, a natural gas collection and treatment integrated device, which comprises 4 modules, wherein each module adopts an upper and lower double-layer layout, the 4 modules are respectively a first module, a second module, a third module and a fourth module, the first module comprises a condensate stabilizer 26, an air cooler 30, a three-phase separator 29 and a pressure regulating valve group, the second module comprises a natural gas inlet unit, a slug flow catcher 12, an alcohol injection skid A, a gas pressure regulating valve 11 and a manifold 10, the third module comprises a filtration separator 16, a sewage buffer tank 17, a precooling heat exchanger 18 and a sewage-to-water pump skid B, and the fourth module comprises a low-temperature separator 19, a propane condensation evaporation skid 22 and a flow regulating valve 31;
each module adopts an upper and a lower double-layer layout, and specifically comprises the following steps:
a condensate stabilizing tower 26 and an air cooler 30 in the first module, a natural gas inlet unit, a slug flow catcher 12 and an alcohol injection pry A in the second module, a filtering separator 16, a sewage buffer tank 17 and a sewage-to-water pump pry B in the third module, and a propane condensation evaporation pry 22 and a low-temperature separator 19 in the fourth module are respectively arranged on the upper layer of the integrated device; the three-phase separator 29 and the pressure regulating valve bank in the first module, the gas pressure regulating valve 11 and the manifold 10 in the second module, the precooling heat exchanger 18 in the third module and the flow regulating valve 31 in the fourth module are respectively arranged at the lower layer of the integrated device;
the natural gas inlet unit comprises a first natural gas inlet pipeline 3 and a second natural gas inlet pipeline 9, an inlet of the first natural gas inlet pipeline 3 is connected with a raw gas, an outlet of the first natural gas inlet pipeline 3 is divided into two paths, one path of the first natural gas inlet pipeline is conveyed to a gas using point after passing through a gas pressure regulating valve 11 and a collecting pipe 10, the other path of the first natural gas inlet pipeline sequentially passes through a slug flow catcher 12 and a filtering separator 16 and then enters a precooling heat exchanger 18, product gas is separated through a propane condensation evaporation pry 22 and a low-temperature separator 19, and the product gas is further subjected to heat exchange through the precooling heat exchanger 18 and the propane condensation evaporation pry 22 and then conveyed to a downstream block through a first natural gas outlet pipeline 35; the inlet of the second natural gas inlet pipeline 9 is connected with raw gas, and the outlet of the second natural gas inlet pipeline 9 is metered by a first natural gas flow meter 20 or a second natural gas flow meter 21 and then is conveyed to a downstream block through a second natural gas outlet pipeline 40;
the inlet of the alcohol injection pry A is connected with a methanol inlet pipeline 1, and the outlet of the alcohol injection pry A is respectively communicated with the precooling heat exchanger 18 and the propane condensation evaporation pry 22;
an inlet of the condensate stabilizing tower 26 is connected with an outlet of the low-temperature separator 19, at least three paths of outlets are formed in the condensate stabilizing tower 26, and a first outlet of the condensate stabilizing tower 26 and an outlet of the three-phase separator 29 are converged by a pressure regulating valve bank and then conveyed to a downstream gas utilization point; a second outlet of the condensate stabilizer tower 26 is connected with a three-phase separator 29 to form a circulation loop; a third outlet of the condensate stabilizer 26 is cooled by the air cooler 30 and then is conveyed to a downstream device for storage through a condensate outlet pipeline 37;
the sewage inlet pipeline 8, the header 10, the slug flow catcher 12, the filtering separator 16, the propane condensation evaporation pry 22 and the low-temperature separator 19 are respectively communicated with the sewage buffer tank 17, and are conveyed to a downstream device through a third sewage outlet pipeline 38 by the sewage-to-water pump pry B after being buffered by the sewage buffer tank 17.
All relevant control and function units of the natural gas collection treatment are highly integrated in a double-layer structure frame, a methanol pump unit is independently formed into a sledge (namely an alcohol injection sledge A), a water transfer pump unit is independently formed into a sledge (namely a sewage-to-water pump sledge B), a propane condensation and evaporation device is independently formed into a sledge (namely a propane condensation and evaporation sledge 22), a fuel gas unit is integrally prefabricated and embedded in the natural gas collection treatment integrated device to form a whole set of device, so that the occupied area is reduced, the cost is saved, the construction period is shortened, and the working efficiency is improved.
Second embodiment
In addition to the above embodiment, the header 10 is connected to the gas consumption point via the first gas outlet line 5, the second gas outlet line 6, and the third gas outlet line 7, which are provided in parallel.
Further, the pressure regulating valve group comprises a first pressure regulating valve 27 and a second pressure regulating valve 28, wherein the first pressure regulating valve 27 is arranged between the outlet of the condensate stabilizer 26 and the inlet of the third gas outlet pipeline 7; the second pressure regulating valve 28 is arranged between the outlet of the three-phase separator 29 and the inlet of the third fuel gas outlet pipeline 7.
Further, the sewage at the bottoms of the slug flow catcher 12, the filtering separator 16, the precooling heat exchanger 18 and the low-temperature separator 19 is discharged to a sewage system through a second sewage outlet pipeline 36; the sewage at the bottoms of the condensate stabilization tower 26 and the three-phase separator 29 are discharged to a sewage system through a first sewage outlet line 34, respectively.
It should be noted that the slug flow catcher 12 and the filter separator 16 are both provided with two sewage disposal paths, one is maintenance sewage disposal and is flushing sewage discharged during shutdown maintenance, the other is normal production sewage disposal and is discharged to a buffer tank, a water transfer pump is used for conveying the sewage to a sewage oil removal tank, oil-water separation is carried out after sedimentation, sewage oil is conveyed to a sewage oil tank, water is conveyed to a downstream produced water treatment device, and the water is used for well site reinjection after treatment. The low-temperature separator 19 is provided with two paths of sewage discharge, one path is the same as the above and is used for sewage discharge maintenance, the other path is conveyed to a condensate oil stabilizing device in the device for treatment, and the treated sewage is conveyed to a buffer tank and is conveyed to a sewage oil removal tank in the same way as the above.
Further, the outlets of the slug flow catcher 12, the filtering separator 16, the precooling heat exchanger 18, the low-temperature separator 19, the condensate stabilizer 26 and the three-phase separator 29 are all provided with safe emptying; specifically, the emptying of the slug flow catcher 12 is connected to an in-plant high-pressure emptying header pipe through a first natural gas emptying pipeline 2; the emptying of the filtering separator 16, the emptying of the precooling heat exchanger 18, the emptying of the low-temperature separator 19, the emptying of the condensate stabilizer 26 and the emptying of the three-phase separator 29 are respectively connected to a high-pressure emptying header pipe in the plant through a fourth natural gas emptying pipeline 32.
Further, the flow metering unit comprises a first natural gas flowmeter 20 and a second natural gas flowmeter 21 which are arranged in parallel, the outlets of the first natural gas flowmeter 20 and the second natural gas flowmeter 21 are respectively provided with a safe emptying pipe, and specifically, the emptying pipe of the first natural gas flowmeter 20 is merged with the emptying pipe of the second natural gas flowmeter 21 and then is connected to a high-pressure emptying header pipe in the plant through a fifth natural gas emptying pipeline 39.
Further, safe emptying is arranged between the gas pressure regulating valve 11 and the header 10, at the outlet of the sewage buffer tank 17 and at the outlet of the propane condensation evaporation pry 22;
specifically, the safe emptying between the fuel gas pressure regulating valve 11 and the manifold 10 is connected to an in-plant low-pressure emptying system through a second natural gas emptying pipeline 4; the emptying of the propane condensation evaporation pry 22 is merged with the emptying of the sewage buffer tank 17 and then is connected to a low-pressure emptying header pipe in the plant through a third natural gas emptying pipeline 23.
Further, the alcohol injection skid A comprises a first alcohol injection pump 13, a second alcohol injection pump 14 and a third alcohol injection pump 15 which are arranged in parallel, and outlets of the first alcohol injection pump 13, the second alcohol injection pump 14 and the third alcohol injection pump 15 are respectively provided with a first methanol emptying pipeline 41, a second methanol emptying pipeline 42 and a third methanol emptying pipeline 43; and the emptying pipelines are respectively connected to the inlet header pipes of the corresponding alcohol injection pumps.
Further, the bottom of the three-phase separator 29 is also connected to an alcohol-containing wastewater outlet line 33.
Further, the sewage-to-water pump pry B comprises a first water-to-water pump 24 and a second water-to-water pump 25 which are arranged in parallel. The sewage water transfer pump sledge is used as a sledge block formed by combining a water transfer pump and an inlet and outlet valve group and is used for conveying sewage in the buffer tank to the sewage oil removal tank through the water transfer pump.
The integrated device for gas collection and treatment of natural gas comprises a natural gas inlet unit, a slug flow catcher, a filtering separator, a low-temperature separator, a precooling heat exchanger, a propane condensation evaporation sledge, a condensate stabilizer, a three-phase separator, an alcohol injection sledge, an air cooler, a gas pressure regulating valve (group), a sewage buffer tank, a manifold, a metering and pressure regulating valve group, a vent outlet, a sewage discharge, a sewage inlet, a natural gas filter, a natural gas pressure regulating valve group, a natural gas flowmeter, a natural gas throttling, a natural gas outlet, an alcohol-containing sewage outlet, a condensate outlet and related control functional units which are highly integrated in a double-layer steel frame structure; the process flow principle, the appearance layout, the structural characteristics and the combination form are shown in the specification, and the device cancels a valve at the inlet interface area of a deoiling and dewatering unit, an ESD (electro static discharge) shut-off valve, an ESD emptying flow, a constant pressure emptying flow and the like of a conventional natural gas treatment plant, moves to the front end of a raw material gas collection flow and combines the same functions with a gas collection area. In addition, the incoming liquid flow of the produced water buffer tank of the device cancels the incoming liquid of a condensate oil stabilizing device, and the condensate oil is stably discharged and directly connected to a methanol sewage tank; eliminating the fuel gas washing tank from the pressurizing area; the manifold drainage of a gas distribution area is cancelled; the manual liquid discharge and pipeline low-point liquid discharge processes of a raw material gas filtering separator are additionally arranged.
Further, the product gas before pressurization is adopted as the fuel gas, the pressure regulating and gas distributing is changed from 2-level pressure regulating to 1-level pressure regulating, a 2-path pressure regulating process is adopted, the 1-path pressure regulating is adjusted to 0.8MPa, the product gas is supplied to the condensate oil stabilizing tower 26 and the three-phase separator 29 to be used as pressure balance gas, and the other 1-path pressure regulating is adjusted to 0.4MPa to be used as a main gas supply line and supplied to the first gas outlet 5, the second gas outlet 6 and the third gas outlet 7; the gas used by a natural gas compressor with the pressure level of 0.80MPa is eliminated.
The low-temperature separator of the conventional natural gas treatment plant is changed from a vertical type to a horizontal type, so that the utilization efficiency of a skid-mounted installation space of the equipment is improved; an evaporative condenser of a conventional natural gas treatment plant is changed into a shell-and-tube heat exchanger; the low-temperature condensate flash separator and the condensate stable buffer tank are combined, the equipment arrangement space and equipment investment are saved, the integral skid-mounting of the propane refrigeration system is realized, the full-liquid evaporator, the propane compressor and the propane steam condenser are integrated in the space of 6m multiplied by 3m multiplied by 3.5m, the mounting space is reduced to 50% of the original mounting space, the pipeline length and the connection points of the propane circulation system are reduced, and the leakage points of propane are reduced.
Third embodiment
The embodiment provides a natural gas collection and treatment integrated device, which comprises 4 modules, and adopts an upper-layer layout and a lower-layer layout, wherein a condensate stabilizer 26 and an air cooler 30 in a first module, a first natural gas inlet pipeline 3, a second natural gas inlet pipeline 9, a slug flow catcher 12 and an alcohol injection skid A in a second module, a filtering separator 16, a sewage buffer tank 17, a water transfer pump 24, a water transfer pump 25 in a third module, a propane condensation evaporation skid 22 and a low-temperature separator 19 in a fourth module are respectively arranged on the upper layer of the integrated device; a three-phase separator 29, a first pressure regulating valve 27 and a second pressure regulating valve 28 in the first module, a gas pressure regulating valve 11 and a header 10 in the second module, a precooling heat exchanger 18 in the third module, and a natural gas flowmeter 20 and a natural gas flowmeter 21 in the fourth module are respectively arranged at the lower layer of the integrated device;
further, a gas phase inlet of the first natural gas inlet pipeline 3 is connected with feed gas, a gas phase outlet of the first natural gas inlet pipeline 3 is connected with a gas phase inlet of the slug flow catcher 12, a gas phase outlet of the slug flow catcher 12 is connected with a gas phase inlet of the filtering separator 16, a gas phase outlet I of the filtering separator 16 is merged with a liquid phase outlet I of the alcohol injection sledge A, and then is connected to a gas phase outlet of the precooling heat exchanger 18, and after heat exchange, is merged with a liquid phase outlet II of the alcohol injection sledge A through a gas phase outlet II of the precooling heat exchanger 18, and then is connected to a gas phase inlet I of the propane condensation evaporation sledge 22; a gas phase outlet I of the propane condensation and evaporation sledge 22 is connected to a gas phase inlet of the low-temperature separator 19, a gas phase outlet I of the low-temperature separator 19 after low-temperature separation is connected to a gas phase inlet II of the precooling heat exchanger 18, a gas phase outlet II of the precooling heat exchanger 18 is connected to a gas phase inlet II of the propane condensation and evaporation sledge 22 after heat exchange, and the gas phase outlet II of the propane condensation and evaporation sledge 22 after heat exchange is conveyed to a pressurization area outside the device through a first natural gas outlet pipeline 35;
a gas phase outlet II of the first natural gas inlet pipeline 3 is connected to a header pipe 10 after being subjected to pressure regulation by a gas pressure regulating valve 11, and then is respectively connected to each gas utilization point through a first gas outlet pipeline 5 and a second gas outlet pipeline 6; the manifold 10 is also provided with a gas outlet, and the gas outlet is converged with a first pressure regulating valve group 27 and a second pressure regulating valve group 28 and then connected to a gas using point through a third gas outlet pipeline 7;
the second natural gas inlet pipeline 9 receives incoming gas from a pressurization area outside the device to a manifold, and the incoming gas is metered by a first natural gas flowmeter 20 and a second natural gas flowmeter 21(1 is used as 1) and then is connected to a clean area outside the device through a second natural gas outlet pipeline 40.
Further, a liquid phase outlet of the slug flow catcher 12 is merged with a liquid phase outlet I of the low-temperature separator 19 and then connected to a liquid phase inlet I of the sewage buffer tank 17; a liquid phase outlet of the filtering separator 16 is connected with a liquid phase outlet of the propane condensation evaporation sledge 22, a liquid phase outlet of the collecting pipe 10 and a liquid phase incoming pipeline (namely a sewage inlet pipeline 8) of a pressurization area outside the device after being converged into a liquid phase inlet II of the sewage buffer tank 17; after buffering, the liquid phase outlet pipeline of the sewage buffer tank 17 is connected to a liquid phase inlet of a first water transfer pump 24 or a second water transfer pump 25, and the liquid phase outlet of the first water transfer pump 24 or the second water transfer pump 25 is connected to a third sewage outlet pipeline 38;
further, a sewage discharge outlet of the slug flow catcher 12, a sewage discharge outlet of the filtering separator 16, a sewage discharge outlet of the precooling heat exchanger and a sewage discharge outlet of the low-temperature separator are merged through a first overhaul sewage discharge pipeline (namely, a second sewage discharge outlet pipeline 36) and then are connected to an external sewage system; and a blowdown outlet of the condensate stabilizing tower 26 and a blowdown outlet of the three-phase separator 29 are merged and then discharged to a sewage system through a second overhaul blowdown pipeline (namely a first sewage outlet pipeline 34).
Further, a liquid phase outlet II of the low-temperature separator 19 is connected to a liquid phase inlet I of the condensate stabilizer 26, a liquid phase outlet I of the condensate stabilizer 26 is connected to a liquid phase inlet of the three-phase separator 29, a liquid phase outlet of the three-phase separator 29 is connected to a liquid phase inlet II of the condensate stabilizer 26, a liquid phase outlet II of the condensate stabilizer 26 is connected to a liquid phase inlet of the air cooler 30, and a liquid phase outlet of the air cooler 30 is conveyed to a downstream device for storage through a condensate outlet pipeline 37 after the flow is regulated by a flow regulator 31; and a gas phase outlet I of the condensate stabilizer 26 and a gas phase outlet I of the three-phase separator 29 are respectively merged after passing through a first pressure regulating valve 27 and a second pressure regulating valve 28, and are conveyed to a downstream gas utilization point through a third gas outlet pipeline 7.
Further, a gas phase outlet of the slug flow catcher 12 is connected to a high-pressure emptying header pipe through a first natural gas emptying pipeline 2; a second gas phase outlet of the filter separator 16, a third gas phase outlet of the pre-cooling heat exchanger 18, a second gas phase outlet of the low-temperature separator 19, a second gas phase outlet of the condensate stabilizer 26 and a second gas phase outlet of the three-phase separator 29 are connected to the high-pressure blowdown header pipe through a fourth natural gas blowdown pipeline 32.
The gas phase outlet of the gas pressure regulating valve 11 is connected to a low-pressure emptying system in the plant through a second natural gas emptying pipeline 4; the gas phase outlet of the sewage buffer tank 17 is merged with the gas phase outlet of the propane condensation evaporation pry 22 and then is connected to the low-pressure emptying header pipe in the plant through a third natural gas emptying pipeline 23.
It is worth mentioning that the device of the invention is divided into double-layer arrangement according to the function and the flow; the distance between the upper layer and the lower layer is 3-4m, the upper layer and the lower layer are connected through two operating walkways, the net height of the bottom of the lower layer is 4.7m, and the forklift can pass through and is used for mounting and dismounting various devices, valves and pipe fittings; and dividing the double-layer arrangement according to functions and processes; combining the human factor analysis conclusion, the device is arranged at an inclined ladder 2 and a straight ladder 1, and a passing walkway is reserved at the edge of the platform.
The device adopts H shaped steel to build through crossbeam and stand, the lower floor sets up in stand and 4 modules to be fixed in subaerially in the basis of each device self of lower floor, the upper platform adopts steel grating to lay, a pipeline gallows is fixed in the crossbeam, and set up in 4 modules on the basis of each device of upper strata is fixed in the crossbeam, make full use of frame crossbeam and stand set up a pipeline gallows and cable testing bridge support, be convenient for each device accessory to change, not only the factory prefabrication rate has been improved, the size restriction problem that long-distance hauling faces has been solved again, the time limit for a project has effectively been shortened.
Specifically, 4 modules of the natural gas collection and treatment integrated device are arranged according to 2 modules and 2 modules, and a 3m maintenance operation space is arranged between the third module device and the fourth module device, so that daily machine maintenance access maintenance and operation are met. Specifically, a first layer of the first module is stable condensate, and a second layer of the first module is used for condensate flash separation; the first layer of the second module is used for gas collection and alcohol injection of raw material gas, and the second layer is used for gas pressure regulation and gas distribution; the first layer and the second layer of the third module and the first layer of the fourth module are natural gas deoiling and dehydrating; the first layer of the third module is sewage buffering; the second layer of the fourth module is product gas metering, which is detailed in table 1 and fig. 1.
Furthermore, the methanol pump unit is independently sledded, the water transfer pump unit is independently sledded, the propane condensation evaporation device is independently sledded, the function of the device is completely consistent with the flow, the outline dimension is completely designed according to the installation requirement in the device, and the device is completely fit with the device while the use function is met. The fuel gas unit is integrally prefabricated, and the pipe clamping supports are arranged among the pipelines, so that the stability is improved, and the transportation and the hoisting are facilitated. The unit is located in a two-layer device, and is integrally hoisted to the two layers during installation, and then the two layers of beams are fixedly connected.
The device has the characteristics of smooth process flow and compact structure space, and can meet the requirements of inspection and maintenance.
Table 1 integrated device region partition statistical table
The installation space of the device area is 23m multiplied by 26m (0.90 mu in total), and the occupied area is reduced by about 85.6 percent compared with the conventional unit device area. And can replace a gas collection area, a gas distribution area, a fuel gas area, a buffer tank area and a deoiling and dehydrating device area in a conventional treatment plant, and integrates 8 functions of raw gas collection, natural gas deoiling and dehydration, methanol injection, produced liquid buffering, condensate flash evaporation, condensate stabilization, gas pressure regulation and distribution, product gas metering and the like in the conventional natural gas treatment plant. The floor area of the treatment plant using the device is reduced by about 51.2 percent compared with the floor area of the conventional treatment plant, and the construction period is shortened by 16.7 percent.
Fourth embodiment
The working process of the integrated natural gas collection and treatment device protected by the embodiment comprises the following steps:
1. the main process flow is as follows:
(1) the raw gas is connected to a natural gas slug flow catcher 12 from a first natural gas inlet pipeline 3, after slug flow is caught, the raw gas is connected to a filtering separator 16 for filtering separation, the separated raw gas enters a precooling heat exchanger 18 for precooling heat exchange with product gas, the raw gas enters a propane condensation evaporation pry 22 for continuous cooling after precooling, then enters a low-temperature separator 19 for separating out product gas, then the product gas and the raw gas exchange heat through the precooling heat exchanger 18 and then enter the propane condensation evaporation pry 22 for further heat exchange, and the product gas after heat exchange is conveyed to a downstream block through a first natural gas outlet pipeline 35.
(2) The second natural gas inlet pipeline 9 receives the incoming gas from the upstream block, measures the incoming gas by the first natural gas flow meter 20 or the second natural gas flow meter 21, and then transmits the incoming gas to the downstream block through the second natural gas outlet pipeline 40.
(3) Part of gas of the first natural gas inlet pipeline 3 is used as start-up fuel gas, passes through a fuel gas pressure regulating valve 11 and a header 10 and then is respectively conveyed to a gas using point through a first fuel gas outlet pipeline 5, a second fuel gas outlet pipeline 6 and a third fuel gas outlet pipeline 7;
(4) the gas at the outlet of the propane condensation evaporation pry 22 is used as a fuel gas source during operation, and is respectively conveyed to a first fuel gas outlet pipeline 5, a second fuel gas outlet pipeline 6 and a third fuel gas outlet pipeline 7 to be conveyed to a gas using point after passing through a fuel gas pressure regulating valve 11 and a header 10;
(5) a small amount of gas separated from the top of the condensate stabilizer 26 and non-condensable gas separated from the three-phase separator 29 are respectively merged after passing through the first pressure stabilizing unit 27 and the second pressure stabilizing unit 28, and are conveyed to a downstream gas utilization point through the third gas outlet pipeline 7.
2. Emptying process:
1) the slug flow catcher 12, the filtering separator 16, the precooling heat exchanger 18, the low-temperature separator 19, the condensate stabilizer 26, the three-phase separator 29 and the natural gas flowmeter are all provided with safe emptying;
wherein, the slug flow catcher 12 is connected to a high-pressure emptying header pipe in the plant through a first natural gas emptying pipeline 2; the filter separator 16, the precooling heat exchanger 18, the low-temperature separator 19, the condensate stabilizing tower 26 and the three-phase separator 29 are respectively connected to a high-pressure emptying header pipe in the plant through a fourth natural gas emptying pipeline 32; and the first natural gas flowmeter 20 and the second natural gas flowmeter 21 are respectively connected to the high-pressure emptying header pipe in the plant through a fifth natural gas emptying pipeline 39.
2) The gas pressure regulating valve 11, the sewage buffer tank 17 and the propane condensation evaporation pry are all provided with safe emptying;
wherein the gas pressure regulating valve 11 is connected to a low-pressure emptying system in the plant through a second natural gas emptying pipeline 4; the emptying of the propane condensation evaporation pry 22 is merged with the emptying of the sewage buffer tank 17 and then is connected to a low-pressure emptying header pipe in the plant through a third natural gas emptying pipeline 23.
3) A first methanol blow-down valve 41, a second methanol blow-down valve 42 and a third methanol blow-down valve 43 are respectively arranged behind the first alcohol injection pump 13, the second alcohol injection pump 14 and the third alcohol injection pump 15; and the emptying valves are respectively connected to the inlet header pipes of the corresponding alcohol injection pumps.
3. And (3) sewage discharge flow:
1) production and pollution discharge: the sewage inlet pipeline 8, the header pipe 10, the slug flow catcher 12, the filtering separator 16, the propane condensation evaporation pry 22 and the low-temperature separator 19 are respectively connected to the sewage buffer tank 17, and are conveyed to a downstream device through a first water transfer pump 24 or a second water transfer pump 25 after being buffered;
wherein, the slug flow catcher 12 is provided with liquid level interlocking alarm and shutoff functions for the production and sewage discharge, and realizes the adjustment of the sewage discharge flow through the liquid level interlocking, thereby stabilizing the liquid level interval in the slug flow catcher 12.
2) Overhauling and discharging pollution: the slug flow catcher 12, the filtering separator 16, the precooling heat exchanger 18 and the low-temperature separator 19 are respectively discharged to the sewage system through a second sewage outlet pipeline 36; the condensate stabilization tower 26 and the three-phase separator 29 are respectively discharged to a sewage system through a first sewage outlet line 34.
3) Condensate-containing sewage: the condensate oil-containing sewage separated by the low-temperature separator 19 enters a condensate oil stabilizing tower 26 for heat exchange, then enters a three-phase separator 29, is separated into stable condensate oil, enters the condensate oil stabilizing tower 26 for stabilization, is cooled by an air cooler 30, and then is conveyed to a downstream device for storage through a condensate oil outlet pipeline 37;
wherein, the low temperature separator 19 production blowdown is equipped with liquid level interlocking warning, shutoff function to realize the blowdown flow through the liquid level interlocking and mediate, and then stabilize the interior liquid level interval of low temperature separator 19.
3) Alcohol-containing sewage: the alcohol-containing sewage separated by the three-phase separator 29 is conveyed to a downstream tank area through an alcohol-containing sewage outlet pipeline 33;
wherein the three-phase separator 29 is provided with an oil-water level meter, the liquid level is interlocked to alarm and shut off, and the sewage discharge flow is adjusted through the liquid level interlocking, so that the liquid level interval in the three-phase separator 29 is stabilized.
Claims (10)
1. The integrated device for gas collection and treatment of natural gas is characterized in that: the integrated device comprises 4 modules, wherein each module adopts an upper double-layer layout and a lower double-layer layout, the 4 modules are respectively a first module, a second module, a third module and a fourth module, the first module comprises a condensate stabilizer (26), an air cooler (30), a three-phase separator (29) and a pressure regulating valve group, the second module comprises a natural gas inlet unit, a slug flow catcher (12), an alcohol injection skid (A), a gas pressure regulating valve (11) and a header pipe (10), the third module comprises a filtering separator (16), a sewage buffer tank (17), a precooling heat exchanger (18) and a sewage transfer pump skid (B), and the fourth module comprises a low-temperature separator (19), a propane condensation evaporation skid (22) and a flow regulating valve (31);
each module adopts an upper and a lower double-layer layout, and specifically comprises the following steps:
a condensate stabilizing tower (26) and an air cooler (30) in a first module, a natural gas inlet unit, a slug flow catcher (12) and an alcohol injection pry (A) in a second module, a filtering separator (16) and a sewage buffer tank (17) in a third module, a sewage-to-water pump pry (B) in a fourth module, a propane condensation evaporation pry (22) and a low-temperature separator (19) in a fourth module are respectively arranged on the upper layer of the integrated device; a three-phase separator (29) and a pressure regulating valve group in the first module, a fuel gas pressure regulating valve (11) and a header pipe (10) in the second module, a precooling heat exchanger (18) in the third module and a flow regulating valve (31) in the fourth module are respectively arranged at the lower layer of the integrated device;
the natural gas inlet unit comprises a first natural gas inlet pipeline (3) and a second natural gas inlet pipeline (9), an inlet of the first natural gas inlet pipeline (3) is connected with a raw gas, an outlet of the first natural gas inlet pipeline (3) is divided into two paths, one path of the natural gas inlet pipeline passes through a gas pressure regulating valve (11) and a header pipe (10) and then is conveyed to a gas using point, the other path of the natural gas inlet pipeline passes through a slug flow catcher (12) and a filtering separator (16) in sequence and then enters a precooling heat exchanger (18), a product gas is separated through a propane condensation evaporation pry (22) and a low-temperature separator (19), and the product gas further exchanges heat through the precooling heat exchanger (18) and the propane condensation evaporation pry (22) and then is conveyed to a downstream block through a first natural gas outlet; the inlet of the second natural gas inlet pipeline (9) is connected with raw gas, and the outlet of the second natural gas inlet pipeline (9) is metered by the flow metering unit and then conveyed to a downstream block through a second natural gas outlet pipeline (40);
the inlet of the alcohol injection pry (A) is connected with a methanol inlet pipeline (1), and the outlet of the alcohol injection pry (A) is respectively communicated with the precooling heat exchanger (18) and the propane condensation evaporation pry (22);
an inlet of the condensate stabilizing tower (26) is connected with an outlet of the low-temperature separator (19), at least three paths of outlets of the condensate stabilizing tower (26) are arranged, and a first outlet of the condensate stabilizing tower (26) and an outlet of the three-phase separator (29) are converged by a pressure regulating valve bank and then conveyed to a downstream gas utilization point; a second outlet of the condensate stabilizing tower (26) is connected with a three-phase separator (29) to form a circulation loop; a third outlet of the condensate stabilizing tower (26) is cooled by an air cooler (30), and then is conveyed to a downstream device for storage through a condensate outlet pipeline (37) through a flow regulating valve (31);
the sewage treatment system is characterized in that the sewage inlet pipeline (8), the header (10), the slug flow catcher (12), the filtering separator (16), the propane condensation evaporation pry (22) and the low-temperature separator (19) are respectively communicated with the sewage buffer tank (17), and are conveyed to a downstream device through a third sewage outlet pipeline (38) by a sewage transfer pump pry (B) after being buffered by the sewage buffer tank (17).
2. The integrated natural gas collection and treatment device according to claim 1, wherein: the collecting pipe (10) is connected with a gas using point through a first fuel gas outlet pipeline (5), a second fuel gas outlet pipeline (6) and a third fuel gas outlet pipeline (7) which are arranged in parallel.
3. The integrated natural gas collection and treatment device according to claim 2, wherein: the pressure regulating valve group comprises a first pressure regulating valve (27) and a second pressure regulating valve (28), and the first pressure regulating valve (27) is arranged between the outlet of the condensate stabilizing tower (26) and the inlet of the third gas outlet pipeline (7); the second pressure regulating valve (28) is arranged between the outlet of the three-phase separator (29) and the inlet of the third fuel gas outlet pipeline (7).
4. The integrated natural gas collection and treatment device according to claim 1, wherein: the sewage at the bottoms of the slug flow catcher (12), the filtering separator (16), the precooling heat exchanger (18) and the low-temperature separator (19) is discharged to a sewage system through a second sewage outlet pipeline (36) respectively; and the sewage at the bottoms of the condensate stabilizing tower (26) and the three-phase separator (29) is discharged to a sewage system through a first sewage outlet pipeline (34) respectively.
5. The integrated natural gas collection and treatment device according to claim 1, wherein: the outlets of the slug flow catcher (12), the filtering separator (16), the precooling heat exchanger (18), the low-temperature separator (19), the condensate stabilizing tower (26) and the three-phase separator (29) are all provided with safe emptying;
the emptying of the slug flow catcher (12) is connected to a high-pressure emptying header pipe in the plant through a first natural gas emptying pipeline (2); and the emptying of the filtering separator (16), the emptying of the precooling heat exchanger (18), the emptying of the low-temperature separator (19), the emptying of the condensate stabilizer (26) and the emptying of the three-phase separator (29) are respectively connected to a high-pressure emptying header pipe in the plant through a fourth natural gas emptying pipeline (32).
6. The integrated natural gas collection and treatment device according to claim 1, wherein: the flow metering unit comprises a first natural gas flowmeter (20) and a second natural gas flowmeter (21) which are arranged in parallel, the outlets of the first natural gas flowmeter (20) and the second natural gas flowmeter (21) are respectively provided with safe emptying, and the emptying of the first natural gas flowmeter (20) and the emptying of the second natural gas flowmeter (21) are merged and then connected into a high-pressure emptying header pipe in the plant through a fifth natural gas emptying pipeline (39).
7. The integrated natural gas collection and treatment device according to claim 1, wherein: safe emptying is arranged between the gas pressure regulating valve (11) and the header (10), at the outlet of the sewage buffer tank (17) and at the outlet of the propane condensation evaporation pry (22);
and the safe emptying between the gas pressure regulating valve (11) and the header (10) is connected to a low-pressure emptying system in the plant through a second natural gas emptying pipeline (4); the emptying of the propane condensation evaporation pry (22) is merged with the emptying of the sewage buffer tank (17) and then is connected to a low-pressure emptying header pipe in the plant through a third natural gas emptying pipeline (23).
8. The integrated natural gas collection and treatment device according to claim 1, wherein: the alcohol injection pry (A) comprises a first alcohol injection pump (13), a second alcohol injection pump (14) and a third alcohol injection pump (15) which are arranged in parallel, and outlets of the first alcohol injection pump (13), the second alcohol injection pump (14) and the third alcohol injection pump (15) are respectively provided with a first methanol emptying pipeline (41), a second methanol emptying pipeline (42) and a third methanol emptying pipeline (43); and the emptying pipelines are respectively connected to the inlet header pipes of the corresponding alcohol injection pumps.
9. The integrated natural gas collection and treatment device according to claim 1, wherein: the device is an upper layer frame structure and a lower layer frame structure which are welded by a cross beam and stand columns, the lower layer frame structure comprises a plurality of stand columns which are anchored on the ground, the upper layer frame structure is paved into a platform by a steel grating, and the platform is connected with the stand columns of the lower layer frame structure into a whole by the cross beam and two operation walkways.
10. The integrated natural gas collection and treatment device according to claim 9, wherein: the distance between the upper layer and the lower layer is 3-5 m.
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