CN105605417A - Low-temperature natural gas recovery treatment device - Google Patents

Low-temperature natural gas recovery treatment device Download PDF

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Publication number
CN105605417A
CN105605417A CN201610010590.5A CN201610010590A CN105605417A CN 105605417 A CN105605417 A CN 105605417A CN 201610010590 A CN201610010590 A CN 201610010590A CN 105605417 A CN105605417 A CN 105605417A
Authority
CN
China
Prior art keywords
natural gas
heat exchanger
attemperater
water
cavity
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.)
Pending
Application number
CN201610010590.5A
Other languages
Chinese (zh)
Inventor
吕忠林
林业
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.)
DONGGUAN XINAO GAS Co Ltd
Original Assignee
DONGGUAN XINAO GAS 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 DONGGUAN XINAO GAS Co Ltd filed Critical DONGGUAN XINAO GAS Co Ltd
Priority to CN201610010590.5A priority Critical patent/CN105605417A/en
Publication of CN105605417A publication Critical patent/CN105605417A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate

Abstract

The invention discloses a low-temperature natural gas recovery treatment device. The low-temperature natural gas recovery treatment device comprises a heat exchanger and a natural gas compressor and further comprises a heat preservation water tank and a high-pressure buffer tank. A metal partition plate is arranged in the heat exchanger in the axial direction. The metal partition plate divides internal space of the heat exchanger into a gas cavity and a water cavity. The gas inlet end of the gas cavity of the heat exchanger is connected with a low-temperature natural gas pipeline, the gas outlet end of the gas cavity is connected with the natural gas compressor, the water inlet end of the water cavity of the heat exchanger is connected with the upper portion of the heat preservation water tank through a pipeline, the water outlet end of the water cavity of the heat exchanger is connected with the lower portion of the heat preservation water tank through a pipeline, and a water inlet pipe is further arranged on the lower portion of the heat preservation water tank. Low-temperature natural gas is recovered, waste heat is recovered to produce hot water, and resources are saved.

Description

A kind of cryogenic natural gas recycling and processing device
Technical field
The present invention relates to a kind of cryogenic natural gas recycling and processing device.
Background technology
Along with the development of China's economic, the demand of the energy is day by day increased, domestic liquefied natural gas is applied in flourish. For liquefied natural gas (LNG) receiving station, LNG liquefaction plant, because LNG storage tank, conveyance conduit unavoidably will absorb outside heat, produce a large amount of cryogenic natural gas. If can not effectively recycle cryogenic natural gas, directly discharged atmosphere, not only cause the pollution of environment, also cause the waste of the energy.
At present, in LNG receiving station, traditional cryogenic natural gas recovery process mainly adopts direct weighting output technique and recondensation process. Direct weighting output technique is to adopt cryogenic natural gas compressor, and low-temp low-pressure natural gas is pressurized to normal temperature high voltage state, is delivered directly to the outer gas ductwork in station. Recondensation process is by the natural gas pressurization of low temperature, extracts LNG from LNG storage tank again, and both are direct heat transfer in condensation more by a certain percentage, and cryogenic natural gas is liquefied again, is transported to high-pressure pump pressurized gasification. In these two kinds of techniques, cryogenic natural gas compressor is the key equipment that cryogenic natural gas is recycled, and is related to main equipment---the normal safe operation of LNG storage tank. At present general low temperature oilless reciprocating or the labyrinth compressor of adopting, domestic Compressor Manufacturing factory there is no design, manufactures the mature experience of such compressor, mainly dependence on import, the device fabrication cycle is long, and manufacturing cost is high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cryogenic natural gas recycling and processing device, and manufacturing cost is lower, effectively saving resource.
In order to solve the problems of the technologies described above, the present invention takes following technical scheme:
A kind of cryogenic natural gas recycling and processing device, comprise heat exchanger and natural gas compressor, also comprise attemperater and high-pressure buffering pot, in heat exchanger, along axis direction, metal partion (metp) is set, the inner space of heat exchanger is separated into air cavity and water cavity by this metal partion (metp), the inlet end of the air cavity of heat exchanger is connected with cryogenic natural gas pipeline, outlet side is connected with natural gas compressor, the water inlet end of the water cavity of heat exchanger by pipeline be connected with attemperater top, water side is connected with attemperater bottom by pipeline, attemperater bottom is also provided with water inlet pipe.
On metal partion (metp) in described heat exchanger, be provided with conducting strip towards the surface of air cavity.
Described high-pressure buffering pot is also connected with diffusing tower, and the connecting line between this diffusing tower and high-pressure buffering pot is provided with isolating valve.
In described attemperater, be provided with electric heater.
In described attemperater, be also provided with level switch and temperature sensor, level switch is positioned at the hot water outlet top of attemperater.
Metal partion (metp) in described heat exchanger is that aluminum is made.
Described water inlet pipe is provided with magnetic valve.
The present invention is heated to be normal-temperature natural-gas with again for downstream pipe network by cryogenic natural gas, and the fume afterheat that utilizes natural gas compressor to produce carries out hot water and produces, thermal source using this hot water as heat exchanger simultaneously, and can use for the external world provides hot water.
Brief description of the drawings
Accompanying drawing 1 is pipeline catenation principle schematic diagram of the present invention.
Detailed description of the invention
For the ease of those skilled in the art's understanding, below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the present invention has disclosed a kind of cryogenic natural gas recycling and processing device, comprise heat exchanger 1 and natural gas compressor 6, also comprise attemperater and high-pressure buffering pot 8, heat exchanger 1 is interior arranges metal partion (metp) 2 along axis direction, the inner space of heat exchanger is separated into air cavity 4 and water cavity 5 by this metal partion (metp) 2, the inlet end of the air cavity 4 of heat exchanger 1 is connected with cryogenic natural gas pipeline, outlet side is connected with natural gas compressor 6, the water inlet end of the water cavity 5 of heat exchanger 1 is connected with attemperater top by pipeline, water side is connected with attemperater bottom by pipeline, attemperater bottom is also provided with water inlet pipe 12. metal partion (metp) is preferably made with aluminum, has better thermal conductivity. on metal partion (metp) 2 in heat exchanger 1, be provided with conducting strip 3 towards the surface of air cavity, utilize this conducting strip, can make the heat energy in water cavity be delivered in air cavity more fast and uniformly.
In addition, high-pressure buffering pot 8 is also connected with diffusing tower 7, and the connecting line between this diffusing tower 7 and high-pressure buffering pot 8 is provided with isolating valve. Open isolating valve, the gas in high-pressure buffering pot can be transported in diffusing tower, in diffusing tower, diffuse, guarantee that the pressure in high-pressure buffering pot can be not too high.
In attemperater, be provided with electric heater 11, guarantee that temperature when the water in attemperater can start this electric heater when low and carry out auxiliary heating, make the temperature of water reach predetermined temperature. In attemperater, be also provided with level switch 9 and temperature sensor 10, level switch is positioned at the hot water outlet top of attemperater. By the temperature of the real-time detection water of this temperature sensor, and level switch whether can detect in real time the water yield in attemperater sufficient, if the water yield is few, can opens water inlet pipe and input running water to attemperater. Water inlet pipe is provided with magnetic valve, realizes automation and opens and closes.
In the present invention, cryogenic natural gas enters into the air cavity of heat exchanger, hot water in attemperater flows in the water cavity of heat exchanger, the heat energy of hot water is in metal partion (metp) is delivered to air cavity, cryogenic natural gas to the air cavity of flowing through heats up, then enter into natural gas compressor and boost from the heat exchanger natural gas normal temperature of being raised to out, and then be input in high-pressure buffering pot and store, thereby from high-pressure buffering pot, be sent in the pipe network of downstream. In the time that the pressure in high-pressure buffering pot is excessive, can open isolating valve, part high-pressure natural gas is delivered in diffusing tower and is diffused. By the flue gas of natural gas compressor being reclaimed and for attemperater is heated, making the water temperature in attemperater increase. If the water temperature in attemperater during lower than design temperature, can be carried out auxiliary heating by the electric heater in attemperater, season as colder in winter.
It should be noted that, the above is not the restriction to technical solution of the present invention, is not departing under the prerequisite of creation design of the present invention, and any apparent replacement is all within protection scope of the present invention.

Claims (7)

1. a cryogenic natural gas recycling and processing device, comprise heat exchanger and natural gas compressor, it is characterized in that, also comprise attemperater and high-pressure buffering pot, in heat exchanger, along axis direction, metal partion (metp) is set, the inner space of heat exchanger is separated into air cavity and water cavity by this metal partion (metp), the inlet end of the air cavity of heat exchanger is connected with cryogenic natural gas pipeline, outlet side is connected with natural gas compressor, the water inlet end of the water cavity of heat exchanger is connected with attemperater top by pipeline, water side is connected with attemperater bottom by pipeline, attemperater bottom is also provided with water inlet pipe.
2. cryogenic natural gas recycling and processing device according to claim 1, is characterized in that, on the metal partion (metp) in described heat exchanger, is provided with conducting strip towards the surface of air cavity.
3. cryogenic natural gas recycling and processing device according to claim 2, is characterized in that, described high-pressure buffering pot is also connected with diffusing tower, and the connecting line between this diffusing tower and high-pressure buffering pot is provided with isolating valve.
4. cryogenic natural gas recycling and processing device according to claim 3, is characterized in that, in described attemperater, is provided with electric heater.
5. cryogenic natural gas recycling and processing device according to claim 4, is characterized in that, is also provided with level switch and temperature sensor in described attemperater, and level switch is positioned at the hot water outlet top of attemperater.
6. cryogenic natural gas recycling and processing device according to claim 5, is characterized in that, the metal partion (metp) in described heat exchanger is that aluminum is made.
7. cryogenic natural gas recycling and processing device according to claim 6, is characterized in that, described water inlet pipe is provided with magnetic valve.
CN201610010590.5A 2016-01-08 2016-01-08 Low-temperature natural gas recovery treatment device Pending CN105605417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610010590.5A CN105605417A (en) 2016-01-08 2016-01-08 Low-temperature natural gas recovery treatment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610010590.5A CN105605417A (en) 2016-01-08 2016-01-08 Low-temperature natural gas recovery treatment device

Publications (1)

Publication Number Publication Date
CN105605417A true CN105605417A (en) 2016-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439480A (en) * 2016-09-23 2017-02-22 上海昆仑新奥清洁能源股份有限公司 Moving dedicated system adopting natural gas reliquefaction recycling process
CN109563966A (en) * 2016-07-21 2019-04-02 能源集团 Module and system for being depressurized to cryogenic tank

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007113442A (en) * 2005-10-19 2007-05-10 Chugoku Electric Power Co Inc:The Waste heat recovery system using boil-off gas
JP2008241168A (en) * 2007-03-28 2008-10-09 Daikin Ind Ltd Heat pump type hot water supply device
CN201621461U (en) * 2010-03-19 2010-11-03 常州亿晶光电科技有限公司 Energy-saving liquid gas vaporizer
CN202927488U (en) * 2012-12-13 2013-05-08 新地能源工程技术有限公司 Low-temperature natural gas recycling and disposal device
CN203731088U (en) * 2013-12-26 2014-07-23 新地能源工程技术有限公司 LNG receiving station process system for recovering BOG based on normal temperature compressor
CN204164655U (en) * 2014-09-16 2015-02-18 廊坊新奥燃气有限公司 A kind of LNG Liquefied natural gas (LNG) storage tank Zero discharging system
CN104390133A (en) * 2014-11-17 2015-03-04 蚌埠市金鹏燃气设备制造有限公司 Device for recovering evaporated natural gas
CN204345268U (en) * 2014-11-17 2015-05-20 武汉三江航天远方科技有限公司 LNG transfer station BOG recycling system
CN105221929A (en) * 2015-11-05 2016-01-06 天津市振津石油天然气工程有限公司 A kind of miniature movable type skid BOG reclaims CNG device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007113442A (en) * 2005-10-19 2007-05-10 Chugoku Electric Power Co Inc:The Waste heat recovery system using boil-off gas
JP2008241168A (en) * 2007-03-28 2008-10-09 Daikin Ind Ltd Heat pump type hot water supply device
CN201621461U (en) * 2010-03-19 2010-11-03 常州亿晶光电科技有限公司 Energy-saving liquid gas vaporizer
CN202927488U (en) * 2012-12-13 2013-05-08 新地能源工程技术有限公司 Low-temperature natural gas recycling and disposal device
CN203731088U (en) * 2013-12-26 2014-07-23 新地能源工程技术有限公司 LNG receiving station process system for recovering BOG based on normal temperature compressor
CN204164655U (en) * 2014-09-16 2015-02-18 廊坊新奥燃气有限公司 A kind of LNG Liquefied natural gas (LNG) storage tank Zero discharging system
CN104390133A (en) * 2014-11-17 2015-03-04 蚌埠市金鹏燃气设备制造有限公司 Device for recovering evaporated natural gas
CN204345268U (en) * 2014-11-17 2015-05-20 武汉三江航天远方科技有限公司 LNG transfer station BOG recycling system
CN105221929A (en) * 2015-11-05 2016-01-06 天津市振津石油天然气工程有限公司 A kind of miniature movable type skid BOG reclaims CNG device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109563966A (en) * 2016-07-21 2019-04-02 能源集团 Module and system for being depressurized to cryogenic tank
CN106439480A (en) * 2016-09-23 2017-02-22 上海昆仑新奥清洁能源股份有限公司 Moving dedicated system adopting natural gas reliquefaction recycling process

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Application publication date: 20160525

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