CN114719188A - Impurity treatment device and coal bed gas gathering and transportation system for coal bed gas - Google Patents
Impurity treatment device and coal bed gas gathering and transportation system for coal bed gas Download PDFInfo
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- 239000012535 impurity Substances 0.000 title claims abstract description 110
- 239000003245 coal Substances 0.000 title claims abstract description 54
- 238000001914 filtration Methods 0.000 claims abstract description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000004581 coalescence Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 58
- 239000002245 particle Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims 1
- 230000008021 deposition Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- -1 for example Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
- F17D3/145—Arrangements for supervising or controlling working operations for eliminating water in gas pipelines
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The embodiment of the application discloses impurity treatment device and coal bed gas gathering and transportation system of coal bed gas belongs to heterogeneous reposition of redundant personnel technical field. The impurity treatment device comprises a well site separator, a valve group filter, a horizontal filtering separator, a compressor postposition separator, a multiphase separator and a vertical coalescence separator; the well site separator is positioned at the well head of the well site in the coal bed gas gathering and transportation system and used for separating impurities at the well head and accommodating the separated impurities into a container independent of the pipeline; the valve bank filter is positioned in a valve bank in the coalbed methane gathering and transportation system and is used for filtering impurities in the valve bank; the compressor postposition separator is positioned in the gas gathering station and used for separating impurities in the gas gathering station; the multiphase separator is positioned in a processing center of the coal bed gas gathering and transportation system and is used for separating impurities entering a second compressor of the processing center. In the embodiment of the application, impurity treatment equipment is arranged in the coal bed gas gathering and transporting system through classification, so that impurity deposition along the pipeline is reduced, and the impurity treatment efficiency is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of multiphase shunting, in particular to a coal bed gas impurity treatment device and a coal bed gas gathering and transportation system.
Background
The coalbed methane has the characteristics of low gas source pressure and small single well yield, so that the coalbed methane gathering and transportation system adopts a process mode of 'wellhead transportation, valve bank control, gas collection station separation and filtration, gas collection station primary pressurization and treatment center secondary pressurization treatment'. However, due to the influence of factors such as geological conditions and extraction methods, solid impurities such as coal dust and sand, and liquid impurities such as free water are often entrained in the coal bed gas from the wellhead to the surface transportation process. Solid impurities can cause abrasion or blockage of instruments and valves, and influence the metering accuracy and the safe and stable operation of a compressor. Liquid impurities can corrode pipelines and equipment and deposit in low-lying locations of gathering and transporting pipelines, which can reduce gathering and transporting efficiency. Therefore, in order to avoid solid impurities damaging equipment and liquid impurities corroding pipelines and equipment, the impurities of the coal bed gas are generally required to be treated by the impurity treatment equipment.
At present, when a ground gathering and transportation system is designed and operated, corresponding separation and filtration equipment is arranged at different gathering and transportation nodes to remove impurities in coal bed gas. For example, a horizontal gas-liquid separator and a vertical filter can be arranged at the front inlet of the compressor of the gas gathering station, a combined filtering separator is arranged at the inlet of the compressor of the processing center, a filter and dewatering equipment are arranged at the outlet of the compressor of the processing center, and separating equipment is not arranged at the outlets of the compressor of the well site, the valve bank and the gas gathering station.
However, conventional horizontal gas-liquid separators are capable of separating particles having a particle size of greater than 50 μm (microns), whereas the particle size of impurities entrained in the gas stream during actual collection is mostly below 10 μm, and the horizontal gas-liquid separators have limited utility. In addition, the vertical filter plays an important role in fine dust separation, but has the problems of large operation load, high replacement frequency of the filter element, high operation cost and the like. The horizontal mixing filter at the outlet of the compressor is difficult to effectively trap a large amount of free water and lubricating oil mist carried in the gas, so that a downstream triethylene glycol dehydration device fails, the quality of the external gas is unqualified, and the liquid-containing gas affects the metering accuracy of the ultrasonic flowmeter, thereby causing serious economic loss.
Disclosure of Invention
The embodiment of the application provides a coal bed gas's impurity processing apparatus and coal bed gas gathering system, can be owing to solve among the correlation technique impurity treatment effeciency low, the effect is poor in the coal bed gas, lead to the problem of equipment damage among the coal bed gas technical system. The technical scheme is as follows:
in one aspect, an impurity treatment device for coal bed gas is provided, and comprises a well site separator, a valve group filter, a horizontal filtering separator, a compressor post-separator, a multi-phase separator and a vertical coalescence separator;
the well site separator is positioned at a well head of a well site in a coal bed gas gathering and transporting system, the well site separator is connected with a liquid condensing cylinder in a valve bank in the coal bed gas gathering and transporting system, and the well site separator is used for separating impurities at the well head and accommodating the separated impurities into a container independent of a pipeline;
the valve bank filter is positioned in a valve bank in the coalbed methane gathering and transportation system and is used for filtering impurities in the valve bank;
the valve group filter is connected with the horizontal filtering separator, the horizontal filtering separator is positioned at an inlet of a gas collecting station of the coalbed methane gathering and transportation system, the horizontal filtering separator is connected with an inlet of a first compressor of the gas collecting station, an outlet of the first compressor is connected with a post-compressor separator, the post-compressor separator is positioned in the gas collecting station, and the post-compressor separator is used for separating impurities in the gas collecting station;
the separator with the post-positioned compressor is also connected with the multiphase separator, the multiphase separator is positioned in a processing center of the coalbed methane gathering and transportation system, the multiphase separator is also connected with inlet equipment of a second compressor of the processing center, and the multiphase separator is used for separating impurities entering the second compressor;
the vertical coalescer is connected to the outlet device of the second compressor and is used for filtering impurities in the treatment center.
In some embodiments, the wellsite separator comprises an air intake pipe, a first housing, axial flow blades, a guide cone, a sump tank, and an air exhaust pipe;
the air inlet pipe is connected with the first shell, the axial flow blades are arranged in the first shell and used for generating rotating airflow so as to throw particle impurities to the inner wall surface of the first shell;
the guide cone cylinder is connected with the first shell, the conical part of the guide cone cylinder is connected with the sewage storage tank, and impurities thrown to the inner wall surface of the first shell are guided into the sewage storage tank through the guide cone cylinder under the action of rotating air flow;
the inlet end of the exhaust pipe is arranged inside the first shell, the exhaust pipe faces away from the air inlet direction, and the exhaust pipe is used for exhausting gas obtained after impurity separation out of the well site separator.
In some embodiments, the wellsite separator is flanged at the location of a pipe right angle elbow at the wellhead.
In some embodiments, the valve block filter comprises a cylinder, an air inlet section, an upper end cover, a lifting lug, a filter basket, an air outlet section, and a blowdown valve;
the filter device is characterized in that the cylinder body is provided with the air inlet section, the air outlet section and the blow-down valve, the upper end cover is mounted on the cylinder body and connected with the lifting lug, the lifting lug is connected with the filter basket so as to suspend the filter basket inside the cylinder body, the filter basket is used for filtering impurities entering the cylinder body from the air inlet section, and the blow-down valve is used for discharging the impurities in the cylinder body.
In some embodiments, the inlet section of the valve block filter is connected to a ball valve in the valve block and the outlet section of the valve block filter is connected to a check valve in the valve block.
In some embodiments, the compressor post-separator comprises an inlet chamber, an outlet chamber, and a plurality of supersonic separation tubes;
the inlet cavity is respectively connected with the inlet pipe section of each supersonic separation pipe in the supersonic separation pipes, and the plurality of separation pipe sections of each supersonic separation pipe are respectively connected with the outlet cavity.
In some embodiments, each supersonic separation tube further comprises a nozzle and a supersonic wing;
the spray pipe is arranged at the inlet pipe section, and the supersonic wings are arranged at the flow pipe section of each supersonic separation pipe.
In some embodiments, each separation tubing section of the plurality of separation tubing sections comprises a dry gas channel and an oil fouling channel.
In some embodiments, the multiphase separator comprises a separation housing, a cyclone, a baffle, and a coalescing filter element;
the cyclone, the baffle plate and the coalescing filter element are sequentially arranged in the separation shell, the cyclone is positioned at the air inlet of the separation shell, and the coalescing filter element is arranged at the air outlet of the separation shell.
On the other hand, a coal bed gas gathering and transporting system is provided, the coal bed gas gathering and transporting system comprises the coal bed gas impurity processing device on the one hand.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
in this application embodiment, because well site separator is located the well head department of well site, the valves filter is located the valves, horizontal filtering separator and the rearmounted separator of compressor are located the gas gathering station, and heterogeneous separator and vertical coalescence separator are located the center of handling, and promptly, different positions are provided with different impurity treatment device in the coal bed gas gathering system to guarantee that every position can both handle impurity, reduced pipeline impurity deposit along the line, improved impurity treatment efficiency. And because the inlet and outlet of the first compressor, the second compressor and other equipment are provided with impurity treatment equipment, the first compressor, the second compressor and other equipment are protected, and economic loss is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for treating impurities in coal bed methane according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a wellsite separator according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a valve group filter according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating a connection relationship between a valve block filter and a valve block according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a post-compressor separator according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a multiphase separator provided in an embodiment of the present application.
Reference numerals:
1: wellsite separator, 2: valve group filter, 3: horizontal filter separator, 4: compressor post-separator, 5: multiphase separator, 6: vertical coalescer, 7: condensate tank, 8: first compressor, 9: a second compressor;
11: intake pipe, 12: first housing, 13: axial flow blade, 14: guide cone, 15: dirt storage tank, 16: an exhaust pipe;
21: barrel, 22: air intake section, 23: upper end cap, 24: lifting lug, 25: filter basket, 26: gas outlet section, 27: a blowoff valve;
101: ball valve, 102: a check valve;
41: inlet chamber, 42: outlet chamber, 43: a supersonic separation tube;
431: inlet pipe section, 432: separation tube section, 433: nozzle, 434: supersonic wing, 435: a flow tube section;
51: separation case, 52: swirler, 53: baffle, 54: and a coalescing filter element.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Before explaining the impurity processing device for coal bed methane provided in the embodiment of the present application in detail, an application scenario of the embodiment of the present application is explained first.
At present, coal bed gas is generally transported out through a coal bed gas collecting and transporting system, and when the coal bed gas is transported out, the coal bed gas collecting and transporting system adopts a process mode of 'wellhead transportation, valve bank control, gas collecting station separation and filtration, gas collecting station primary pressurization, and processing center secondary pressurization processing'. That is, the single-port or multi-well produced gas collects the produced gas to a control valve group by utilizing the residual pressure of a well mouth, the gas passes through the control valve group and is collected to a gas collecting station through a gas collecting manifold, the gas collecting station enters a processing center after being subjected to primary filtering separation and primary pressurization, and the processing center is subjected to separation, filtration, secondary pressurization, dehydration and metering, so that the coal bed gas is output. However, when impurities are treated by a horizontal gas-liquid separator and a vertical filter in a gas gathering station and a filter in a treatment center, most of the impurities cannot be separated because the horizontal gas-liquid separator cannot separate the impurities with small particle size, and the vertical filter can treat fine dust, but has the problems of short filter element replacement period and high operation cost.
Based on such application scenario, the embodiment of the application provides an impurity processing device of coal bed gas, which can improve the impurity separation efficiency.
Fig. 1 is a coal bed gas impurity processing device provided by an embodiment of the present application, and referring to fig. 1, the impurity processing device is characterized by comprising a wellsite separator 1, a valve group filter 2, a horizontal filtering separator 3, a compressor post-separator 4, a multiphase separator 5 and a vertical coalescing separator 6; the well site separator 1 is positioned at a well head of a well site in the coal bed gas gathering and transporting system, the well site separator 1 is connected with a condensate cylinder 7 in a valve bank in the coal bed gas gathering and transporting system, and the well site separator 1 is used for separating impurities at the well head and accommodating the separated impurities into a container independent of a pipeline; the valve bank filter 2 is positioned in a valve bank in the coalbed methane gathering and transportation system, and the valve bank filter 2 is used for filtering impurities in the valve bank; the valve group filter 2 is connected with a horizontal filtering separator 3, the horizontal filtering separator 3 is positioned at an inlet of a gas collecting station of the coal bed gas gathering and transportation system, the horizontal filtering separator 3 is connected with an inlet of a first compressor 8 of the gas collecting station, an outlet of the first compressor 8 is connected with a compressor post-separator 4, the compressor post-separator 4 is positioned in the gas collecting station, and the compressor post-separator 4 is used for separating impurities in the gas collecting station; the compressor post-separator 4 is also connected with a multiphase separator 5, the multiphase separator 5 is positioned in a processing center of the coal bed gas gathering and transportation system, the multiphase separator 5 is also connected with inlet equipment of a second compressor 9 of the processing center, and the multiphase separator 5 is used for separating impurities entering the second compressor 9; the vertical coalescer 6 is connected to the outlet device of the second compressor 9, the vertical coalescer 6 being used for filtering impurities in the process centre.
In this application embodiment, because well site separator 1 is located the well head department of well site, valves filter 2 is located the valves, horizontal filtering separator 3 and compressor postposition separator 4 are located the gas gathering station, heterogeneous separator 5 and vertical coalescence separator 6 are located the center of handling, promptly, different positions are provided with different impurity treatment equipment in the coal bed gas gathering system to guarantee that every position can both be handled impurity, reduced pipeline impurity deposit along the line, improved impurity treatment efficiency. And because the inlet and outlet of the first compressor, the second compressor and other equipment are provided with impurity treatment equipment, the first compressor, the second compressor and other equipment are protected, and economic loss is avoided.
As an example, the wellsite separator 1 can be flanged in place of a right angle bend of pipe at the wellhead. The valve block filter 2 can also be attached at the right angle bend of the pipe of the valve block.
In some embodiments, because the wellsite separator 1 can be flanged to the location of the pipe right angle elbow at the inlet, the wellsite separator 1 can be directly disassembled when cleaning and maintenance are required, and a length of flanged elbow can be installed in place of the pipe right angle elbow after disassembly. Because this section flanged effect that can play temporary substitution to the influence to the defeated outward of coal bed gas has been reduced.
It is worth mentioning that the well site separator 1 and the valve group filter 2 can be installed and connected by utilizing the existing pipeline section, so that the pipeline does not need to be laid again, and the construction and reconstruction cost is reduced.
In some embodiments, due to micron-sized particulate impurities in the incoming gas of the coal bed gas to the upstream of the first compressor 8, the particles form oil stains after being mixed with the cylinder lubricating oil of the first compressor 8, a part of larger particles are deposited and adhered to the inner wall of the cylinder body and the gas valve, and abrade the valve plate, so that the compression efficiency is reduced; another portion of the smaller particles is entrained with the gas stream to the compressor downstream piping. Meanwhile, due to the process of drainage and gas production of the coal bed gas, saturated water vapor is mixed in the coal bed gas, and a large amount of free water is separated out after compression, so that gas-liquid (containing lubricating oil mist and free water simultaneously) solid-liquid multiphase flow is formed in the pipeline behind the first compressor 8. In the oil stain (gas-liquid-solid multiphase flow) in the pipeline behind the first compressor 8, one part is deposited on the inner wall of the pipeline under the conditions of certain pressure, temperature and gas velocity, so that the gathering and transportation efficiency is reduced, and the other part is transported to downstream users, so that the pollution to process equipment is caused. Therefore, in order to avoid damaging the first compressor and improve the gathering efficiency, the horizontal filtering separator 3 may be disposed in the gas gathering station to filter particles having a particle size of 5 microns or more and reduce the concentration of particles having a particle size of 1 to 5 microns as much as possible.
And because the gas of the coal bed gas after the first compressor 8 is in a saturated moisture state, the gas has the characteristics of relatively high gas temperature and high impurity concentration, in order to filter impurities in a targeted manner, the compressor post-separator 4 can be installed in the gas collecting station, and the liquid drops can be accelerated and cooled to a diffusion and deceleration process along with the gas flow through the compressor post-separator 4, so that the condensation, separation and sedimentation of the liquid are realized.
It should be noted that the outlet device of the second compressor 9 can be a high-pressure separator, and the inlet device of the second compressor 9 can be a low-pressure separator.
Referring to fig. 2, the wellsite separator 1 includes an inlet pipe 11, a first housing 12, axial blades 13, a guide cone 14, a sump tank 15, and an outlet pipe 16.
As an example, the intake pipe 11 is connected to a first casing 12, an axial flow blade 13 is provided inside the first casing 12, and the axial flow blade 13 is used for generating a rotating airflow to throw particulate impurities to an inner wall surface of the first casing 12; the guide cone cylinder 14 is connected with the first shell 12, the conical part of the guide cone cylinder 14 is connected with the sewage storage tank 15, and impurities thrown to the inner wall surface of the first shell 12 are guided into the sewage storage tank 15 through the guide cone cylinder 14 under the action of rotating air flow; an inlet end of an exhaust pipe 16 is arranged inside the first housing 12, the exhaust pipe 16 facing away from the gas inlet direction, the exhaust pipe 16 being used for discharging the gas after separation of impurities out of the wellsite separator 1.
After the impurity-containing gas in a laminar flow state enters the first shell 12 of the well field separator 1 from the gas inlet pipe 11, the impurity-containing gas can be rectified into a rotating gas flow at the axial flow blades 13, particulate impurities with large particle diameters are thrown to the inner wall surface of the first shell 12, and the impurity concentration in the central region of the first shell 12 is remarkably reduced; the rotating airflow continues to rotate forward under the action of the guide cone and turns back, so that clean airflow (gas after impurity separation) flows out of the wellsite separator 1 from the inlet end of the exhaust pipe 16; the impurities thrown to the inner wall surface of the first housing 12 are moved out of the guide cone 14 along the wall surface and discharged into the dirt storage tank 15 under the action of the rotating airflow.
In some embodiments, the axial flow blades 13, the guide cone 14, the exhaust pipe 16 and other critical components can be made of corrosion-resistant materials, for example, stainless steel materials can be used.
It is worth to be noted that, as the key components such as the axial flow blades 13, the guide cone cylinder 14 and the exhaust pipe 16 can be made of corrosion-resistant materials, the possibility of corrosion of the surfaces of the key components such as the axial flow blades 13, the guide cone cylinder 14 and the exhaust pipe 16 is reduced, the resistance loss is reduced, and the cleaning is convenient.
Referring to fig. 3, the valve block filter 2 can include a cylinder 21, an air inlet section 22, an upper end cap 23, a lifting lug 24, a filter basket 25, an air outlet section 26, and a blow-off valve 27.
As an example, the cylinder 21 is provided with an air inlet section 22, an air outlet section 26 and a blow-off valve 27, the cylinder 21 is provided with an upper end cover 23, the upper end cover 23 is connected with a lifting lug 24, the lifting lug 24 is connected with a filter basket 25 to suspend the filter basket 25 inside the cylinder 21, the filter basket 25 is used for filtering impurities entering the cylinder 21 from the air inlet section 22, and the blow-off valve 27 is used for discharging the impurities inside the cylinder 21.
It should be noted that, since the lifting lug 24 is connected to the filter basket 25, after the upper end cap 23 is opened, the filter basket 25 can be taken out of the cylinder 21 through the lifting lug 24, thereby facilitating disassembly and cleaning.
Referring to fig. 4, the inlet section 21 of the valve block filter 2 is connected to a ball valve 101 in the valve block, and the outlet section 26 of the valve block filter 2 is connected to a check valve 102 in the valve block.
In some embodiments, two gas lines can be provided in the valve block, each comprising a right angle elbow, and therefore the equipment in each gas line comprises a ball valve 101, a block filter 2 and a check valve 102, see fig. 4.
In some embodiments, when the valve group filters 2 are cleaned, normal operation of one of the valve group filters can be ensured by using a primary mode and a standby mode.
It is worth mentioning that the pressure drop increase of the valve group filter 2 is slowed down, since the two gas lines can use the valve group filter 2 at the same time.
The components such as the cylinder 21 and the filter basket 25 can be made of corrosion-resistant materials, for example, stainless steel materials.
It is worth to say that, since corrosion-resistant materials such as stainless steel can be adopted, the corrosion of the components such as the cylinder 21 and the filter basket 25 is improved, the deposition of impurities on the components such as the cylinder 21 and the filter basket 25 is reduced, and the reuse of the components such as the cylinder 21 and the filter basket 25 is facilitated.
Referring to FIG. 5, compressor after-separator 4 includes an inlet chamber 41, an outlet chamber 42, and a plurality of supersonic separation tubes 43.
As an example, inlet chamber 41 is coupled to inlet spool piece 431 of each supersonic separation tube 43 of plurality of supersonic separation tubes 43, respectively, and plurality of separation spool pieces 432 of each supersonic separation tube 43 is coupled to outlet chamber 42, respectively.
In some embodiments, one more supersonic separation tube 43 is disposed in parallel in the post-compressor separator 4, and the number of the separation tubes can be adjusted according to the variation of the gas transportation amount to ensure the impurity separation effect.
In some embodiments, referring to fig. 5, each supersonic separation tube 43 further comprises a lance 433 and a supersonic wing 434.
As an example, lance 433 is mounted at inlet duct section 431 and supersonic wings 434 are mounted at flow duct section 435 of each supersonic separation duct 43.
Referring to fig. 5, each separation tube segment of the plurality of separation tube segments 432 includes a dry gas channel and an oil contamination channel.
In order to avoid recontamination of the gas phase by the liquid-solid phase, each separation pipe section can comprise a dry gas channel from which the gas can be transported and an oil-contaminated channel from which the oil can be transported after the supersonic separator 4 has separated the oil from the gas after the first compressor 8.
Referring to fig. 6, multiphase separator 5 can include a separation housing 51, a cyclone 52, a baffle 53, and a coalescing filter element 54.
In some embodiments, cyclone 52, baffle 53, and coalescing filter element 54 are sequentially disposed within the interior of separation housing 51, with cyclone 52 at the inlet of separation housing 51 and coalescing filter element 54 at the outlet of separation housing 51.
Because the air supply that the processing center came to the station is complicated, the particulate matter impurity concentration change is great, in order to improve the gas quality of the gas that gets into second compressor 9 to prolong second compressor 9's life, should adopt the preseparation mode of whirl and baffling board, after getting rid of the particle impurity that the particle diameter is 2 ~ 5 microns and above, realize the fine filtration to micron order dust and liquid drop through the coalescence filter core.
In this application embodiment, because well site separator is located the well head department of well site, the valves filter is located the valves, horizontal filtering separator and the rearmounted separator of compressor are located the gas gathering station, and heterogeneous separator and vertical coalescence separator are located the center of handling, and promptly, different positions are provided with different impurity treatment device in the coal bed gas gathering system to guarantee that every position can both handle impurity, reduced pipeline impurity deposit along the line, improved impurity treatment efficiency. And because the inlet and outlet of the first compressor, the second compressor and other equipment are provided with impurity treatment equipment, the first compressor, the second compressor and other equipment are protected, and economic loss is avoided.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present application, and the present application embodiment is not described in detail again.
The embodiment of the application provides a coalbed methane gathering and transporting system, which comprises the coalbed methane impurity processing device shown in the figures 1-6.
In the embodiment of the application, because including the impurity treatment device that can improve impurity treatment efficiency and impurity treatment effect in the defeated system of coal bed gas collection to the efficiency of the defeated system of coal bed gas collection when transporting coal bed gas has been guaranteed.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only a preferred embodiment of the present application, and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The impurity treatment device of the coal bed gas is characterized by comprising a well site separator, a valve group filter, a horizontal filtering separator, a compressor post-separator, a multiphase separator and a vertical coalescence separator;
the well site separator is positioned at a well head of a well site in the coal bed gas gathering and transportation system, the well site separator is connected with a condensate cylinder in a valve bank in the coal bed gas gathering and transportation system, and the well site separator is used for separating impurities at the well head and accommodating the separated impurities into a container independent of a pipeline;
the valve bank filter is positioned in a valve bank in the coalbed methane gathering and transportation system and is used for filtering impurities in the valve bank;
the valve group filter is connected with the horizontal filtering separator, the horizontal filtering separator is positioned at an inlet of a gas collecting station of the coalbed methane gathering and transportation system, the horizontal filtering separator is connected with an inlet of a first compressor of the gas collecting station, an outlet of the first compressor is connected with a post-compressor separator, the post-compressor separator is positioned in the gas collecting station, and the post-compressor separator is used for separating impurities in the gas collecting station;
the separator with the post-positioned compressor is also connected with the multiphase separator, the multiphase separator is positioned in a processing center of the coalbed methane gathering and transportation system, the multiphase separator is also connected with inlet equipment of a second compressor of the processing center, and the multiphase separator is used for separating impurities entering the second compressor;
the vertical coalescer is connected to the outlet device of the second compressor and is used for filtering impurities in the treatment center.
2. The impurity treatment apparatus of claim 1, wherein the wellsite separator comprises an inlet pipe, a first housing, axial flow blades, a guide cone, a sump tank, and an exhaust pipe;
the air inlet pipe is connected with the first shell, the axial flow blades are arranged in the first shell and used for generating rotating airflow so as to throw particle impurities to the inner wall surface of the first shell;
the guide cone cylinder is connected with the first shell, the conical part of the guide cone cylinder is connected with the sewage storage tank, and impurities thrown to the inner wall surface of the first shell are guided into the sewage storage tank through the guide cone cylinder under the action of rotating air flow;
the inlet end of the exhaust pipe is arranged inside the first shell, the exhaust pipe faces away from the air inlet direction, and the exhaust pipe is used for exhausting gas obtained after impurity separation out of the well site separator.
3. The impurity treatment apparatus of claim 1, wherein the wellsite separator is flanged at the wellhead at the location of a pipe right angle bend.
4. The impurity treatment device of claim 1, wherein the valve block filter comprises a cylinder, an air inlet section, an upper end cap, a lifting lug, a filter basket, an air outlet section and a blowdown valve;
the cylinder body is provided with the air inlet section, the air outlet section and the blow-down valve, the upper end cover is mounted on the cylinder body and connected with the lifting lug, the lifting lug is connected with the filter basket so as to suspend the filter basket inside the cylinder body, the filter basket is used for filtering impurities entering the cylinder body from the air inlet section, and the blow-down valve is used for discharging the impurities in the cylinder body.
5. The impurity treatment apparatus of claim 1 or 4, wherein the inlet section of the valve block filter is connected to a ball valve in the valve block, and the outlet section of the valve block filter is connected to a check valve in the valve block.
6. The impurity processing apparatus of claim 1, wherein said compressor post-separator comprises an inlet chamber, an outlet chamber, and a plurality of supersonic separation tubes;
the inlet cavity is respectively connected with the inlet pipe section of each supersonic separation pipe in the supersonic separation pipes, and the plurality of separation pipe sections of each supersonic separation pipe are respectively connected with the outlet cavity.
7. The impurity treatment apparatus of claim 6, wherein each supersonic separation tube further comprises a nozzle and a supersonic wing;
the spray pipe is arranged at the inlet pipe section, and the supersonic wings are arranged at the flow pipe section of each supersonic separation pipe.
8. The contaminant treatment apparatus of claim 6, wherein each separation tube segment of the plurality of separation tube segments comprises a dry gas channel and an oil fouling channel.
9. The impurity treatment apparatus of claim 1, wherein the multiphase separator comprises a separation housing, a cyclone, a baffle, and a coalescing filter element;
the cyclone, the baffle plate and the coalescence filter element are sequentially arranged in the separation shell, the cyclone is positioned at the air inlet of the separation shell, and the coalescence filter element is arranged at the air outlet of the separation shell.
10. A coal bed gas gathering and transportation system, characterized in that the coal bed gas gathering and transportation system comprises the coal bed gas impurity treatment device of any one of the above claims 1 to 9.
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| CN114719188B (en) | 2023-09-26 |
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