CN210885868U - Membrane-method separation method methane preparation system based on methane temperature self-lifting - Google Patents

Membrane-method separation method methane preparation system based on methane temperature self-lifting Download PDF

Info

Publication number
CN210885868U
CN210885868U CN201921572438.1U CN201921572438U CN210885868U CN 210885868 U CN210885868 U CN 210885868U CN 201921572438 U CN201921572438 U CN 201921572438U CN 210885868 U CN210885868 U CN 210885868U
Authority
CN
China
Prior art keywords
methane
pipeline
compressed
air
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201921572438.1U
Other languages
Chinese (zh)
Inventor
乔楠
王刚
席瑞鑫
王利平
郝学威
赵屾
郎曼
柏永青
李晓华
曹彦林
武春林
李伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Junli Gas Technology Co ltd
Shanxi Fenxi Heavy Industry Co Ltd
Original Assignee
SHANXI FENXI ELECTROMECHANICAL CO Ltd
Shanxi Fenxi Heavy Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANXI FENXI ELECTROMECHANICAL CO Ltd, Shanxi Fenxi Heavy Industry Co Ltd filed Critical SHANXI FENXI ELECTROMECHANICAL CO Ltd
Priority to CN201921572438.1U priority Critical patent/CN210885868U/en
Application granted granted Critical
Publication of CN210885868U publication Critical patent/CN210885868U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency

Abstract

The utility model discloses a embrane method separation method preparation methane system based on marsh gas temperature is from promoting has solved the problem that has the electric energy to consume and lead to high in production cost greatly when having the embrane method separation method preparation methane for the prior art. The air-air heat exchanger is arranged between the cooling dryer and the module, the marsh gas which is output by the cooling dryer and is removed of moisture and impurities is heated, the heat source gas of the air-air heat exchanger adopts the compressed marsh gas which is compressed by the compressor and has higher temperature, the temperature of the marsh gas is automatically raised, the marsh gas compressed by the compressor is dual-purpose, the working heat of the compressor is fully utilized, the link of the electric heater is omitted, and the effects of saving energy and reducing the production cost are achieved.

Description

Membrane-method separation method methane preparation system based on methane temperature self-lifting
Technical Field
The invention relates to a preparation system of high-purity methane, in particular to a system and a method for increasing methane temperature in the process of separating and preparing methane by a membrane separation method.
Background
Methane is prepared by purifying methane, and the commonly adopted methods comprise a pressure swing adsorption method, a water washing method, a membrane separation method and the like; the membrane separation method is to analyze and separate methane introduced into a membrane group through the membrane group to obtain high-purity methane, and the method is based on the fact that the speed of different gas molecules in the methane passing through membrane filaments in the membrane group is different, and the common process is that the methane is analyzed and separated through a first-stage membrane group firstly and then enters a second-stage membrane group for analysis and separation again to obtain the methane, wherein in the method, the membrane group has certain requirements on the process pressure and the process temperature of the methane introduced into the membrane group, and the process temperature generally requires 40 ℃ to achieve the optimal analysis and separation effect; however, because the biogas contains a large amount of moisture and impurities, the biogas needs to be pressurized before being introduced into the membrane module, and the moisture and the impurities in the biogas are removed, the conventional process flow is that the biogas is firstly introduced into a compressor for compression, and the compressed biogas enters a freeze-drying machine for removing the moisture and the impurities, but the temperature of the biogas treated by the freeze-drying machine can be reduced to about 10 ℃, which cannot meet the requirement that the process temperature of the biogas needs to reach 40 ℃, an electric heater is generally arranged between the freeze-drying machine and the membrane module, and the temperature of the biogas is raised to the required process temperature by an electric heating method, so that the process method consumes a large amount of electric energy, and the production cost is also raised.
Disclosure of Invention
The invention provides a methane preparation system based on a membrane separation method for methane temperature self-elevation, which solves the technical problem of high production cost caused by large electric energy consumption in the process of preparing methane by using the membrane separation method in the prior art.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: an air-air heat exchanger is arranged between the cold dryer and the membrane group, methane output by the cold dryer and without moisture, oil and various VOC component impurities is heated, compressed methane with higher temperature compressed by a compressor is adopted as heat source gas of the air-air heat exchanger, the temperature of the methane is automatically raised, the methane compressed by the compressor is dual-purpose, the working heat of the compressor is fully utilized, an electric heater link is omitted, energy is saved, and the production cost is reduced.
A methane system is prepared by a membrane separation method based on methane temperature self-elevation, and comprises a methane input pipeline, a compressor, a cold dryer and a membrane group, wherein the methane input pipeline is connected to a gas source input port of the compressor, a compressed methane output pipeline is connected to a compressed gas output port of the compressor, the other end of the compressed methane output pipeline is communicated with an input port of the cold dryer, a low-temperature methane conveying pipeline is connected to an output port of the cold dryer, the other end of the low-temperature methane conveying pipeline is communicated with a heat exchange gas input port of an air-air heat exchanger, a heated methane conveying pipeline is connected to a heat exchange gas output port of the air-air heat exchanger, the other end of the heated methane conveying pipeline is communicated with a gas input port of the separation analysis membrane group, a methane output pipeline is connected to a gas output port of the separation analysis membrane group, and a compressed methane output branch pipeline is connected between the compressed methane output pipeline and a heat source gas, a compressed marsh gas returning pipeline after heat exchange is connected between a marsh gas input pipeline connected to the air source input port of the compressor and a heat source gas output port of the air-air heat exchanger after heat exchange.
The ratio of the gas volume of the compressed methane introduced from the input port of the air dryer to the gas volume introduced from the heat source gas input port of the air-air heat exchanger is 5: 2; an electric heater is connected in parallel on the methane conveying pipeline after the temperature is raised.
The invention utilizes the heat generated by the methane compressor in the compression process to heat the low-temperature methane, so that the heat energy discharged in the methane preparation process is fully utilized, the consumption of electric energy is reduced, the production process equipment is simplified, and the temperature regulation and control operation is simple and easy.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a methane preparation system based on a membrane separation method for automatically increasing methane temperature comprises a methane input pipeline 1, a compressor 2, a cold dryer 4 and a membrane group 8, wherein the methane input pipeline 1 is connected to an air source input port of the compressor 2, a compressed methane output pipeline 3 is connected to a compressed gas output port of the compressor 2, the other end of the compressed methane output pipeline 3 is communicated with an input port of the cold dryer 4, a low-temperature methane conveying pipeline 5 is connected to an output port of the cold dryer 4, the other end of the low-temperature methane conveying pipeline 5 is communicated with a heat exchange gas input port of an air-air heat exchanger 6, a heated methane conveying pipeline 7 is connected to a heat exchange gas output port of the air-air heat exchanger 6, the other end of the heated methane conveying pipeline 7 is communicated with a gas input port of the membrane group 8, and a methane output pipeline 9 is connected to a gas output port of the membrane group 8, a compressed methane output branch pipeline 10 is connected between the compressed methane output pipeline 3 and a heat source gas input port of the air-air heat exchanger 6, and a compressed methane return pipeline 11 after heat exchange is connected between a methane input pipeline 1 connected to a gas source input port of the compressor 2 and a heat source gas output port after heat exchange of the air-air heat exchanger 6.
The ratio of the gas volume of the compressed methane introduced from the input port of the air dryer 4 to the gas volume introduced from the heat source gas input port of the air-air heat exchanger 6 is 5: 2; after the temperature is raised, the methane conveying pipeline 7 is connected with an electric heater 12 in parallel to serve as a standby heater.
When the compressor 2 compresses the biogas, the temperature of the compressed biogas is raised to about 80 ℃ due to mechanical friction and work done on gas compression, the compressed biogas is provided with a compressed biogas output branch pipeline 10, the high-temperature compressed biogas output by the compressor 2 is conveyed in two ways, most of the high-temperature compressed biogas enters the cold dryer 4 through the compressed biogas output pipeline 3 to remove moisture and impurities, the temperature of the processed biogas is lowered to about 10 ℃, a small part of the high-temperature compressed biogas enters the air-air heat exchanger 6 through the compressed biogas output branch pipeline 10 to be used as heat source gas to perform air-air heat exchange with the low-temperature biogas conveyed from the cold dryer 4, the low-temperature biogas is heated to about 40 ℃ to meet the temperature requirement of the membrane group 8 on the input biogas, the heat source gas after heat exchange returns to the input port of the compressor 2 to be compressed again in the compressor 2, and is compressed and then output to the compressed biogas output pipeline 3 again, the methane temperature self-lifting structure saves the consumption of an electric heater and electric energy and realizes the recycling of a methane gas source; the invention can adopt a centralized control method of real-time comparison between the installation of the pipeline temperature sensor and the set temperature target to regulate and control the pipeline electric valve in time, thereby achieving the function of adjusting the air quantity to reach the set target.

Claims (2)

1. A membrane separation method methane preparation system based on methane temperature self-elevation comprises a methane input pipeline (1), a compressor (2), a cold dryer (4) and a membrane group (8), and is characterized in that the methane input pipeline (1) is connected to an air source input port of the compressor (2), a compressed methane output pipeline (3) is connected to a compressed gas output port of the compressor (2), the other end of the compressed methane output pipeline (3) is communicated with an input port of the cold dryer (4), a low-temperature methane conveying pipeline (5) is connected to an output port of the cold dryer (4), the other end of the low-temperature methane conveying pipeline (5) is communicated with a heat exchange gas input port of an air heat exchanger (6), a methane conveying pipeline (7) after temperature rise is connected to a heat exchange gas output port of the air heat exchanger (6), and the other end of the methane conveying pipeline (7) after temperature rise is communicated with a gas input port of the membrane group (8), a methane output pipeline (9) is connected to a gas output port of the membrane group (8), a compressed methane output branch pipeline (10) is connected between the compressed methane output pipeline (3) and a heat source gas input port of the air-air heat exchanger (6), and a compressed methane return pipeline (11) after heat exchange is connected between a methane input pipeline (1) connected to a gas source input port of the compressor (2) and a heat source gas output port after heat exchange of the air-air heat exchanger (6).
2. The system for preparing methane based on the membrane-method separation method for the self-elevation of the biogas temperature as claimed in claim 1, wherein the ratio of the gas amount of the compressed biogas introduced at the input port of the freeze dryer (4) to the gas amount introduced at the heat source gas input port of the air-air heat exchanger (6) is 5: 2; an electric heater (12) is connected in parallel on the methane conveying pipeline (7) after the temperature is raised.
CN201921572438.1U 2019-09-20 2019-09-20 Membrane-method separation method methane preparation system based on methane temperature self-lifting Active CN210885868U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921572438.1U CN210885868U (en) 2019-09-20 2019-09-20 Membrane-method separation method methane preparation system based on methane temperature self-lifting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921572438.1U CN210885868U (en) 2019-09-20 2019-09-20 Membrane-method separation method methane preparation system based on methane temperature self-lifting

Publications (1)

Publication Number Publication Date
CN210885868U true CN210885868U (en) 2020-06-30

Family

ID=71312391

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921572438.1U Active CN210885868U (en) 2019-09-20 2019-09-20 Membrane-method separation method methane preparation system based on methane temperature self-lifting

Country Status (1)

Country Link
CN (1) CN210885868U (en)

Similar Documents

Publication Publication Date Title
CN201815225U (en) Air membrane separation device adopting hollow fiber membrane drying technique
CN204299833U (en) Classification supercharge system
CN104121170A (en) Stage pressurization air supply system
CN104405653A (en) Air compressor unit integration device capable of recovering waste heat and implementing method
CN209875424U (en) Air compressor machine takes off wet output increasing device based on booster compressor waste heat recovery
CN210885868U (en) Membrane-method separation method methane preparation system based on methane temperature self-lifting
CN201279431Y (en) Natural gas afterheat regeneration dehumidifier
CN205115042U (en) Ionic membrane system oxygen system
WO2020010773A1 (en) Helium recovery system for cooling pipe made of optical fiber and control method
CN203866052U (en) Online purification and circulation equipment for waste helium during air-conditioner leakage detection
CN110563542A (en) Membrane-method separation method methane preparation system based on methane temperature self-lifting
CN2761249Y (en) Low pressure orificing regeneration type pressure natural gas drier
CN202500746U (en) Cold and heat multiple-supplying system based on inflator waste heat utilization
CN204311038U (en) A kind of energy-saving natual gas dehydrate unit
CN205115416U (en) Marsh gas washing purification natural gas system
CN202983482U (en) Dehumidification device for pressurizing solution depth
CN201276549Y (en) Advanced dewatering equipment for natural gas
CN103053991A (en) Energy-saving cooling method and energy-saving cooling device of compressed air for aerobic microbial fermentation system
CN203120911U (en) Device for energy saving and temperature reducing of compressed air of aerobic microorganism fermenting system in production of monosodium glutamate
CN205269362U (en) Energy -saving compressed air dewatering heat sink
CN103881781A (en) Marsh gas membrane separation methane purifying technology
CN205109340U (en) Dewatering system of coal bed gas
CN204051398U (en) Molecular sieve dehydration system
CN205187871U (en) Heat structure is crossed to dual pressure dilute nitric acid device's ammonia
CN201276550Y (en) Dewatering equipment for natural gas

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20220705

Address after: 030000 third floor, no.280 malinying West Road, Taiyuan Tanghuai Park, Shanxi comprehensive reform demonstration zone, Taiyuan City, Shanxi Province

Patentee after: Shanxi Junli Gas Technology Co.,Ltd.

Patentee after: Shanxi Fenxi Heavy Industry Co., Ltd

Address before: 030027 No. 131 Heping North Road, Shanxi, Taiyuan

Patentee before: SHANXI FENXI HEAVY INDUSTRY Co.,Ltd.

Patentee before: Shanxi Fenxi mechanical and Electrical Co., Ltd.

TR01 Transfer of patent right