CN102650373A - L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption - Google Patents
L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption Download PDFInfo
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Abstract
The invention discloses an L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption. The L-CNG skid-mounted device is characterized in that: a low-temperature heat-insulation storage tank V001 is communicated with a low-temperature high-pressure spherical storage tank V002 and a low-temperature high-pressure spherical storage tank V003 through pipelines; an LNG (Liquid Natural Gas) high-pressure booster V004 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V002; an LNG high-pressure booster V005 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V003; output ends of the low-temperature high-pressure spherical storage tank V002 and the low-temperature high-pressure spherical storage tank V003 are connected with an LNG high-pressure air temperature type gasifying device V006 through pipelines; and the LNG high-pressure air temperature type gasifying device V006 is respectively connected with a CNG (Compressed Natural Gas) low-pressure gas storage bottle group or a gas storage well V007, a CNG middle-pressure gas storage bottle group or a gas storage well V008, and a CNG high-pressure gas storage bottle group or a gas storage well V009. The L-CNG skid-mounted device can convert the liquid natural gas into the compressed natural gas without using a high-voltage pump. The production cost is greatly reduced for an owner of a gas station, so as to save energy sources for a country.
Description
Technical field
The present invention relates to a kind of tooling, specifically is a kind of tooling that does not use high-pressure service pump LNG Liquefied natural gas (LNG) to be converted into compressed natural gas (CNG).
Background technique
Along with extensive use and the develop rapidly of LNG technology in China, the technology of L-CNG gas station and application are also at high speed development, and market demand is also increasing; But traditional L-CNG principle of device is to use the cryogenic high pressure pump that LNG is pressurizeed, and the LNG of high pressure changes into CNG through the vaporizer endothermic gasification.Conversion process mesohigh pump can consume a large amount of electric energy, causes the CNG cost higher, also wastes national energy simultaneously.The cryogenic high pressure pump delivery of separate unit 30kw is 900Nm3/h, sells the 20000Nm3 rock gas every day then needs power consumption 667 degree at least if be equivalent to a small-sized L-CNG gas station.This energy consumption causes traditional L-CNG device to produce the CNG cost and produces the CNG height much than common compressor, has a strong impact on popularization, the application of L-CNG gas station.
Summary of the invention
The objective of the invention is to overcome the existing high shortcoming of traditional L-CNG plant energy consumption, through improvement a kind of no energy consumption L-CNG device is provided, need not to use the cryogenic high pressure pump, significantly reduce energy consumption at this.
The present invention is achieved in that a kind of no energy consumption L-CNG skid-mounted device, it is characterized in that:
Be provided with Cryo Heat Insulation storage tank V001: adopt double-decked insulation, be used for storing in the gas station LNG; Be provided with cryogenic high pressure spherical storage tank V002, cryogenic high pressure spherical storage tank V003: be used for storing LNG temporarily; Be provided with LNG high-voltage booster V004, LNG high-voltage booster V005: be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and can make the spherical tank inner pressure rising of high pressure after the gasification; Be provided with LNG high pressure air-heating type gasifier V006: be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and the gas after the gasification is CNG; Be provided with CNG low pressure air cylinder group or gas storage well V007: be used to store CNG, supply the CNG filling machine to use; Be provided with and press air cylinder group or gas storage well V008 among the CNG: be used to store CNG, supply the CNG filling machine to use; Be provided with CNG high-pressure gas cylinder group or gas storage well V009: be used to store CNG, supply the CNG filling machine to use;
Said Cryo Heat Insulation storage tank V001 is connected logical through pipeline with cryogenic high pressure spherical storage tank V002 with cryogenic high pressure spherical storage tank V003; Said LNG high-voltage booster V004 correspondence is arranged on the cryogenic high pressure spherical storage tank V002; Said LNG high-voltage booster V005 correspondence is arranged on the cryogenic high pressure spherical storage tank V003; Cryogenic high pressure spherical storage tank V002 is connected with LNG high pressure air-heating type gasifier V006 through pipeline with cryogenic high pressure spherical storage tank V003 output terminal, and this LNG high pressure air-heating type gasifier V006 presses air cylinder group or gas storage well V008 and CNG high-pressure gas cylinder group or gas storage well V009 to be connected respectively with among CNG low pressure air cylinder group or gas storage well V007, the CNG.
According to a kind of no energy consumption L-CNG skid-mounted device of the present invention, it is characterized in that: be provided with high-pressure check valve D01, high-pressure check valve D02, high-pressure check valve D03 and high-pressure check valve D04, be used to prevent the medium reverse flow; High-pressure check valve D01 is arranged on the corresponding input duct of LNG high pressure air-heating type gasifier V006, and high-pressure check valve D02, high-pressure check valve D03 and high-pressure check valve D04 are separately positioned among CNG low pressure air cylinder group or gas storage well V007, the CNG and press on air cylinder group or gas storage well V008, CNG high-pressure gas cylinder group or the gas storage well V009 gas pipeline;
Being provided with high-pressure pneumatic ball valve GV01, high-pressure pneumatic ball valve GV02, high-pressure pneumatic ball valve GV03, high-pressure pneumatic ball valve GV04, high-pressure pneumatic ball valve GV05, high-pressure pneumatic ball valve GV06 correspondence is arranged on the pipeline that is connected between Cryo Heat Insulation storage tank V001 and cryogenic high pressure spherical storage tank V002 and the cryogenic high pressure spherical storage tank V003; High-pressure pneumatic ball valve GV07, high-pressure pneumatic ball valve GV08 are arranged on the pipeline that is connected between cryogenic high pressure spherical storage tank V002 and cryogenic high pressure spherical storage tank V003 and the LNG high pressure air-heating type gasifier V006; High-pressure pneumatic ball valve GV09 is provided with on the LNG high-voltage booster V004 pipeline corresponding with cryogenic high pressure spherical storage tank V002; High-pressure pneumatic ball valve GV10 is provided with on the LNG high-voltage booster V005 pipeline corresponding with cryogenic high pressure spherical storage tank V003, and high-pressure pneumatic ball valve GV11, high-pressure pneumatic ball valve GV12, high-pressure pneumatic ball valve GV13 are arranged in CNG low pressure air cylinder group or gas storage well V007, CNG and press on air cylinder group or gas storage well V008, CNG high-pressure gas cylinder group or the gas storage well V009 gas pipeline.
A kind of controlling method of not having energy consumption L-CNG skid-mounted device is characterized in that:
(1), high pressure sphere tank V002 feed liquor flow process: open pneumatic ball valve GV01, GV03; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V002 through pneumatic ball valve GV01; Process middle part separatory cognition flashes to gas, and gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV03.Behind high pressure sphere tank V002 filled with fluid, close pneumatic ball valve GV01, GV03;
(2), high pressure sphere tank V002 supercharging flow process: open pneumatic ball valve GV07, GV09; A small amount of cryogenic liquide flows into high-voltage booster V004 through pneumatic ball valve GV09 in the high pressure sphere tank V002; Cryogenic liquide absorbs heat of vaporization in pressurized machine V004 be gas; Gas is got back in the high pressure sphere tank V002, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V002 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V002 and flows into high pressure gasifier V006 through GV07, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier V006 and heats up into high-pressure natural gas CNG;
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11; The CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores; Supply CNG aerating mechanism of qi to give the CNG refueling; When the pressure balance in high pressure sphere tank V002 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV09 simultaneously and stop supercharging
(3), high pressure sphere tank V003 feed liquor flow process: open pneumatic ball valve GV04, GV06; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V003 through pneumatic ball valve GV04; Process middle part separatory cognition flashes to gas; Gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV06, closes pneumatic ball valve GV04, GV06 until high pressure sphere tank V003 filled with fluid;
(4), high pressure sphere tank V003 supercharging flow process: open pneumatic ball valve GV08, GV10.A small amount of cryogenic liquide flows into high-voltage booster V005 through pneumatic ball valve GV08 in the high pressure sphere tank V003; Cryogenic liquide absorbs heat of vaporization in pressurized machine V005 be gas; Gas is got back in the high pressure sphere tank V003, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V003 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V003 and flows into high pressure gasifier V006 through GV08, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier and heats up into high-pressure natural gas CNG;
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11, the CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores, and supplies the CNG filling machine to give the CNG refueling.When the pressure balance in high pressure sphere tank V003 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV10 simultaneously and stop supercharging.
(5), release flow process of high pressure sphere tank V002: open pneumatic ball valve GV07, GV08; High pressure sphere tank V002 is because through pressurization; Internal pressure is high, is the low temperature LNG liquid that just gets in the high pressure sphere tank V003, and its pressure and temperature is all very low; Pressurized gas in the high pressure sphere tank V002 get into high pressure sphere tank V003 through pneumatic ball valve GV07, GV08; Cryogenic liquide by among the high pressure sphere tank V003 liquefies again, after high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, closes pneumatic ball valve GV07, GV08, and this moment, high pressure sphere tank V002 internal pressure was very low;
(6), high pressure sphere tank V002 secondary release flow process: open pneumatic ball valve GV02, unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV02 in the high pressure sphere tank V002, is liquefied again by cryogenic liquide in the Cryo Heat Insulation storage tank V001.When Cryo Heat Insulation storage tank V001 and high pressure sphere tank V002 pressure balance, close GV02;
(7), release flow process of high pressure sphere tank V003: open pneumatic ball valve GV07, GV08; High pressure sphere tank V003 is because through pressurization; Internal pressure is high, is the low temperature LNG liquid that just gets in the high pressure sphere tank V002, and its pressure and temperature is all very low; Pressurized gas in the high pressure sphere tank V003 get into high pressure sphere tank V002 through pneumatic ball valve GV08, GV07; Cryogenic liquide by among the high pressure sphere tank V002 liquefies again, after high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, closes pneumatic ball valve GV07, GV08, and this moment, high pressure sphere tank V003 internal pressure was very low;
(8), high pressure sphere tank V003 secondary release flow process: open pneumatic ball valve GV05; Unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV05 in the high pressure sphere tank V003; Again liquefied by cryogenic liquide in the Cryo Heat Insulation storage tank V001, when Cryo Heat Insulation storage tank V001 and high pressure sphere tank V003 pressure balance, close GV05
At first LNG Liquefied natural gas (LNG) is a kind of cryogenic liquide, gasification fast after it is heated, and gasification back volume can expand about 600 times.Construct a kind of special tooling; It is characterized in that: the characteristic of utilizing LNG to be heated and to gasify and to expand; Let LNG in high pressure sphere tank through the high-voltage booster supercharging, utilize high pressure gasifier to be gasificated into CNG then, CNG deposits in proper order in the high, medium and low voltage CNG caisson and goes.And unnecessary gas utilizes LNG liquid to liquefy again after the supercharging, to avoid discharging.Whole process need not to use the high-power high voltage pump can LNG Liquefied natural gas (LNG) be converted into compressed natural gas (CNG).This device also can be used for liquid nitrogen, liquid oxygen, liquid argon are converted into high pressure nitrogen, high pressure oxygen, high pressure argon gas.
A kind of no energy consumption L-CNG skid-mounted device of the present invention possesses function of increasing pressure, can the LNG of low pressure be become high pressure LNG through the high-voltage booster supercharging.Possess pressure relief, cause discharging, special gas release liquefaction flow path is again arranged for avoiding after the LNG supercharging a large amount of pressurized gas to return the Cryo Heat Insulation storage tank.Possesses the function that high pressure CNG is charged in proper order high, medium and low voltage CNG caisson.This device also can be used for liquid nitrogen, liquid oxygen, liquid argon are converted into high pressure nitrogen, high pressure oxygen, high pressure argon gas.
The invention has the advantages that: the present invention realizes need not to use high-pressure service pump can the LNG Liquefied natural gas of low pressure be converted into compressed natural gas through a kind of no energy consumption L-CNG skid-mounted device.For the owner of gas station reduces production costs significantly, be national energy saving.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 101, Cryo Heat Insulation storage tank V001,102, cryogenic high pressure spherical storage tank V002,103, cryogenic high pressure spherical storage tank V003,104, LNG high-voltage booster V004; 105, LNG high-voltage booster V005,106, LNG high pressure air-heating type gasifier V006,107, CNG low pressure air cylinder group or gas storage well V007,108, press air cylinder group or gas storage well V008 among the CNG; 109, CNG high-pressure gas cylinder group or gas storage well V009,110, high-pressure check valve D01,111, high-pressure check valve D02; 112, high-pressure check valve D03,113, high-pressure check valve D04,114, high-pressure pneumatic ball valve GV01; 115, high-pressure pneumatic ball valve GV02,116, high-pressure pneumatic ball valve GV03,117, high-pressure pneumatic ball valve GV04; 118, high-pressure pneumatic ball valve GV05,119, high-pressure pneumatic ball valve GV06,120, high-pressure pneumatic ball valve GV07; 121, high-pressure pneumatic ball valve GV08,122, high-pressure pneumatic ball valve GV09,123, high-pressure pneumatic ball valve GV10; 124, high-pressure pneumatic ball valve GV11,125, high-pressure pneumatic ball valve GV12,126, high-pressure pneumatic ball valve GV13.
Embodiment
Below in conjunction with accompanying drawing the present invention is made detailed description:
The present invention provides a kind of no energy consumption L-CNG skid-mounted device, and is as shown in Figure 1: be provided with Cryo Heat Insulation storage tank V001101: adopt double-decked insulation, be used for storing in the gas station LNG.Be provided with cryogenic high pressure spherical storage tank V002 102, cryogenic high pressure spherical storage tank V003 103: be used for storing LNG temporarily.Be provided with LNG high-voltage booster V004 104, LNG high-voltage booster V005 105: be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and can make the spherical tank inner pressure rising of high pressure after the gasification.Be provided with LNG high pressure air-heating type gasifier V006 106: be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and the gas after the gasification is CNG.Be provided with CNG low pressure air cylinder group or gas storage well V007 107: be used to store CNG, supply the CNG filling machine to use.Be provided with and press air cylinder group or gas storage well V008 108 among the CNG: be used to store CNG, supply the CNG filling machine to use; Be provided with CNG high-pressure gas cylinder group or gas storage well V009 109: be used to store CNG, supply the CNG filling machine to use.
Said Cryo Heat Insulation storage tank V001 101 is connected logical through pipeline with cryogenic high pressure spherical storage tank V002 102 with cryogenic high pressure spherical storage tank V003 103.Said LNG high-voltage booster V004 104 correspondences are arranged on the cryogenic high pressure spherical storage tank V002 102.Said LNG high-voltage booster V005 105 correspondences are arranged on the cryogenic high pressure spherical storage tank V003 103; Cryogenic high pressure spherical storage tank V002 102 is connected with LNG high pressure air-heating type gasifier V006 106 through pipeline with cryogenic high pressure spherical storage tank V003 103 output terminals, and this LNG high pressure air-heating type gasifier V006 106 presses air cylinder group or gas storage well V008 108 and CNG high-pressure gas cylinder group or gas storage well V009 109 to be connected respectively with among CNG low pressure air cylinder group or gas storage well V007 107, the CNG.Be provided with high-pressure check valve D01 110, high-pressure check valve D02 111, high-pressure check valve D03 112 and high-pressure check valve D04 113, be used to prevent the medium reverse flow; High-pressure check valve D01 110 is arranged on the corresponding input duct of LNG high pressure air-heating type gasifier V006 106, and high-pressure check valve D02 111, high-pressure check valve D03 112 and high-pressure check valve D04 113 are separately positioned among CNG low pressure air cylinder group or gas storage well V007 107, the CNG and press on air cylinder group or gas storage well V008 108, CNG high-pressure gas cylinder group or gas storage well V009 109 gas pipelines.
Being provided with high-pressure pneumatic ball valve GV01 114, high-pressure pneumatic ball valve GV02 115, high-pressure pneumatic ball valve GV03 116, high-pressure pneumatic ball valve GV04 117, high-pressure pneumatic ball valve GV05 118, high-pressure pneumatic ball valve GV06 119 correspondences is arranged on the pipeline that is connected between Cryo Heat Insulation storage tank V001 101 and cryogenic high pressure spherical storage tank V002 102 and the cryogenic high pressure spherical storage tank V003 103; High-pressure pneumatic ball valve GV07 120, high-pressure pneumatic ball valve GV08 121 are arranged on the pipeline that is connected between cryogenic high pressure spherical storage tank V002 102 and cryogenic high pressure spherical storage tank V003 103 and the LNG high pressure air-heating type gasifier V006 106; High-pressure pneumatic ball valve GV09 122 is provided with on the corresponding pipeline of LNG high-voltage booster V004 104 and cryogenic high pressure spherical storage tank V002 102; High-pressure pneumatic ball valve GV10 123 is provided with on the corresponding pipeline of LNG high-voltage booster V005 105 and cryogenic high pressure spherical storage tank V003 103, and high-pressure pneumatic ball valve GV11 124, high-pressure pneumatic ball valve GV12 125, high-pressure pneumatic ball valve GV13 126 are arranged in CNG low pressure air cylinder group or gas storage well V007 107, CNG and press on air cylinder group or gas storage well V008 108, CNG high-pressure gas cylinder group or gas storage well V009 109 gas pipelines.
No energy consumption L-CNG skid-mounted device according to the invention possesses function of increasing pressure, can the LNG of low pressure be become high pressure LNG through the high-voltage booster supercharging.Possess pressure relief, cause discharging, special gas release liquefaction flow path is again arranged for avoiding after the LNG supercharging a large amount of pressurized gas to return the Cryo Heat Insulation storage tank.Possesses the function that high pressure CNG is charged in proper order high, medium and low voltage CNG caisson.This device also can be used for liquid nitrogen, liquid oxygen, liquid argon are converted into high pressure nitrogen, high pressure oxygen, high pressure argon gas.
A kind of controlling method of not having energy consumption L-CNG skid-mounted device,
(1), high pressure sphere tank V002 feed liquor flow process: open pneumatic ball valve GV01, GV03; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V002 through pneumatic ball valve GV01; Process middle part separatory cognition flashes to gas, and gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV03.Behind high pressure sphere tank V002 filled with fluid, close pneumatic ball valve GV01, GV03.
(2), high pressure sphere tank V002 supercharging flow process: open pneumatic ball valve GV07, GV09; A small amount of cryogenic liquide flows into high-voltage booster V004 through pneumatic ball valve GV09 in the high pressure sphere tank V002; Cryogenic liquide absorbs heat of vaporization in pressurized machine V004 be gas; Gas is got back in the high pressure sphere tank V002, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V002 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V002 and flows into high pressure gasifier V006 through GV07, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier V006 and heats up into high-pressure natural gas CNG.
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11; The CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores; Supply CNG aerating mechanism of qi to give the CNG refueling; When the pressure balance in high pressure sphere tank V002 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV09 simultaneously and stop supercharging.
(3), high pressure sphere tank V003 feed liquor flow process: open pneumatic ball valve GV04, GV06; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V003 through pneumatic ball valve GV04; Process middle part separatory cognition flashes to gas; Gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV06, closes pneumatic ball valve GV04, GV06 until high pressure sphere tank V003 filled with fluid.
(4), high pressure sphere tank V003 supercharging flow process: open pneumatic ball valve GV08, GV10.A small amount of cryogenic liquide flows into high-voltage booster V005 through pneumatic ball valve GV08 in the high pressure sphere tank V003; Cryogenic liquide absorbs heat of vaporization in pressurized machine V005 be gas; Gas is got back in the high pressure sphere tank V003, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V003 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V003 and flows into high pressure gasifier V006 through GV08, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier and heats up into high-pressure natural gas CNG.
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11, the CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores, and supplies the CNG filling machine to give the CNG refueling.When the pressure balance in high pressure sphere tank V003 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV10 simultaneously and stop supercharging.
(5), release flow process of high pressure sphere tank V002: open pneumatic ball valve GV07, GV08, high pressure sphere tank V002 is the low temperature LNG liquid that just gets into because through pressurization, internal pressure is high in the high pressure sphere tank V003, and its pressure and temperature is all very low.Pressurized gas in the high pressure sphere tank V002 get into high pressure sphere tank V003 through pneumatic ball valve GV07, GV08; Cryogenic liquide by among the high pressure sphere tank V003 liquefies again; After high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, close pneumatic ball valve GV07, GV08, this moment, high pressure sphere tank V002 internal pressure was very low.
(6), high pressure sphere tank V002 secondary release flow process: open pneumatic ball valve GV02, unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV02 in the high pressure sphere tank V002, is liquefied again by cryogenic liquide in the Cryo Heat Insulation storage tank V001.When Cryo Heat Insulation storage tank V001 and high pressure sphere tank V002 pressure balance, close GV02.
(7), release flow process of high pressure sphere tank V003: open pneumatic ball valve GV07, GV08; High pressure sphere tank V003 is because through pressurization; Internal pressure is high, is the low temperature LNG liquid that just gets in the high pressure sphere tank V002, and its pressure and temperature is all very low; Pressurized gas in the high pressure sphere tank V003 get into high pressure sphere tank V002 through pneumatic ball valve GV08, GV07; Cryogenic liquide by among the high pressure sphere tank V002 liquefies again, after high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, closes pneumatic ball valve GV07, GV08, and this moment, high pressure sphere tank V003 internal pressure was very low.
(8), high pressure sphere tank V003 secondary release flow process: open pneumatic ball valve GV05; Unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV05 in the high pressure sphere tank V003; Again liquefied by cryogenic liquide in the Cryo Heat Insulation storage tank V001, when Cryo Heat Insulation storage tank V001 and high pressure sphere tank V003 pressure balance, close GV05.
So far flow process constitutes circulation, forms the function that continues LNG constantly is converted into CNG.One of two high pressure sphere tank (cryogenic high pressure spherical storage tank V002, cryogenic high pressure spherical storage tank V003) at supercharging output (high pressure sphere tank V002 carry out the supercharging flow process in high pressure sphere tank V003 carry out the feed liquor flow process), are realized the conversion that continues one of feed liquor each other by turns.This device also can be used for liquid nitrogen, liquid oxygen, liquid argon are converted into high pressure nitrogen, high pressure oxygen, high pressure argon gas, as long as the medium of in Cryo Heat Insulation storage tank V001, adorning is liquid nitrogen, liquid oxygen, liquid argon.
Claims (3)
1. no energy consumption L-CNG skid-mounted device is characterized in that:
Be provided with Cryo Heat Insulation storage tank V001 (101): adopt double-decked insulation, be used for storing in the gas station LNG; Be provided with cryogenic high pressure spherical storage tank V002 (102), cryogenic high pressure spherical storage tank V003 (103): be used for storing LNG temporarily; Be provided with LNG high-voltage booster V004 (104), LNG high-voltage booster V005 (105): be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and can make the spherical tank inner pressure rising of high pressure after the gasification; Be provided with LNG high pressure air-heating type gasifier V006 (106): be used for absorbing heat from air, the LNG that heat transferred is inner lets the LNG gasification of being heated, and the gas after the gasification is CNG; Be provided with CNG low pressure air cylinder group or gas storage well V007 (107): be used to store CNG, supply the CNG filling machine to use; Be provided with and press air cylinder group or gas storage well V008 (108) among the CNG: be used to store CNG, supply the CNG filling machine to use; Be provided with CNG high-pressure gas cylinder group or gas storage well V009 (109): be used to store CNG, supply the CNG filling machine to use;
Said Cryo Heat Insulation storage tank V001 (101) is connected logical through pipeline with cryogenic high pressure spherical storage tank V002 (102) with cryogenic high pressure spherical storage tank V003 (103); Said LNG high-voltage booster V004 (104) correspondence is arranged on the cryogenic high pressure spherical storage tank V002 (102); Said LNG high-voltage booster V005 (105) correspondence is arranged on the cryogenic high pressure spherical storage tank V003 (103); Cryogenic high pressure spherical storage tank V002 (102) is connected with LNG high pressure air-heating type gasifier V006 (106) through pipeline with cryogenic high pressure spherical storage tank V003 (103) output terminal, and this LNG high pressure air-heating type gasifier V006 (106) presses air cylinder group or gas storage well V008 (108) and CNG high-pressure gas cylinder group or gas storage well V009 (109) to be connected respectively with among CNG low pressure air cylinder group or gas storage well V007 (107), the CNG.
2. a kind of no energy consumption L-CNG skid-mounted device according to claim 1; It is characterized in that: be provided with high-pressure check valve D01 (110), high-pressure check valve D02 (111), high-pressure check valve D03 (112) and high-pressure check valve D04 (113), be used to prevent the medium reverse flow; High-pressure check valve D01 (110) is arranged on the corresponding input duct of LNG high pressure air-heating type gasifier V006 (106), and high-pressure check valve D02 (111), high-pressure check valve D03 (112) and high-pressure check valve D04 (113) are separately positioned among CNG low pressure air cylinder group or gas storage well V007 (107), the CNG on pressure air cylinder group or gas storage well V008 (108), CNG high-pressure gas cylinder group or gas storage well V009 (109) gas pipeline;
Being provided with high-pressure pneumatic ball valve GV01 (114), high-pressure pneumatic ball valve GV02 (115), high-pressure pneumatic ball valve GV03 (116), high-pressure pneumatic ball valve GV04 (117), high-pressure pneumatic ball valve GV05 (118), high-pressure pneumatic ball valve GV06 (119) correspondence is arranged on the pipeline that is connected between Cryo Heat Insulation storage tank V001 (101) and cryogenic high pressure spherical storage tank V002 (102) and the cryogenic high pressure spherical storage tank V003 (103); High-pressure pneumatic ball valve GV07 (120), high-pressure pneumatic ball valve GV08 (121) are arranged on the pipeline that is connected between cryogenic high pressure spherical storage tank V002 (102) and cryogenic high pressure spherical storage tank V003 (103) and the LNG high pressure air-heating type gasifier V006 (106); High-pressure pneumatic ball valve GV09 (122) is provided with on LNG high-voltage booster V004 (104) pipeline corresponding with cryogenic high pressure spherical storage tank V002 (102); High-pressure pneumatic ball valve GV10 (123) is provided with on LNG high-voltage booster V005 (105) pipeline corresponding with cryogenic high pressure spherical storage tank V003 (103), and high-pressure pneumatic ball valve GV11 (124), high-pressure pneumatic ball valve GV12 (125), high-pressure pneumatic ball valve GV13 (126) are arranged in CNG low pressure air cylinder group or gas storage well V007 (107), CNG and press on air cylinder group or gas storage well V008 (108), CNG high-pressure gas cylinder group or gas storage well V009 (109) gas pipeline.
3. controlling method of not having energy consumption L-CNG skid-mounted device is characterized in that:
(1), high pressure sphere tank V002 feed liquor flow process: open pneumatic ball valve GV01, GV03; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V002 through pneumatic ball valve GV01; Process middle part separatory cognition flashes to gas, and gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV03;
Behind high pressure sphere tank V002 filled with fluid, close pneumatic ball valve GV01, GV03;
(2), high pressure sphere tank V002 supercharging flow process: open pneumatic ball valve GV07, GV09; A small amount of cryogenic liquide flows into high-voltage booster V004 through pneumatic ball valve GV09 in the high pressure sphere tank V002; Cryogenic liquide absorbs heat of vaporization in pressurized machine V004 be gas; Gas is got back in the high pressure sphere tank V002, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V002 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V002 and flows into high pressure gasifier V006 through GV07, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier V006 and heats up into high-pressure natural gas CNG;
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11; The CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores; Supply CNG aerating mechanism of qi to give the CNG refueling; When the pressure balance in high pressure sphere tank V002 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV09 simultaneously and stop supercharging
(3), high pressure sphere tank V003 feed liquor flow process: open pneumatic ball valve GV04, GV06; LNG among the Cryo Heat Insulation storage tank V001 flows into high pressure sphere tank V003 through pneumatic ball valve GV04; Process middle part separatory cognition flashes to gas; Gas flows back to Cryo Heat Insulation storage tank V001 through pneumatic ball valve GV06, closes pneumatic ball valve GV04, GV06 until high pressure sphere tank V003 filled with fluid;
(4), high pressure sphere tank V003 supercharging flow process: open pneumatic ball valve GV08, GV10;
A small amount of cryogenic liquide flows into high-voltage booster V005 through pneumatic ball valve GV08 in the high pressure sphere tank V003; Cryogenic liquide absorbs heat of vaporization in pressurized machine V005 be gas; Gas is got back in the high pressure sphere tank V003, because boil-off gas is bigger than primary liquid volume, causes high pressure sphere tank V003 internal air pressure to raise rapidly; Air pressure promotes the interior liquid of high pressure sphere tank V003 and flows into high pressure gasifier V006 through GV08, high-pressure check valve D01, and cryogenic liquide gasifies in high pressure gasifier and heats up into high-pressure natural gas CNG;
Be docile and obedient preface and open pneumatic ball valve GV13, GV12, GV11, the CNG order charges among high, medium and low voltage CNG caisson V009, V008, the V007 through these three pneumatic ball valves and stores, and supplies the CNG filling machine to give the CNG refueling;
When the pressure balance in high pressure sphere tank V003 and the low pressure CNG caisson V007, close high-pressure pneumatic ball valve GV13, GV12, GV11, close GV10 simultaneously and stop supercharging;
(5), release flow process of high pressure sphere tank V002: open pneumatic ball valve GV07, GV08; High pressure sphere tank V002 is because through pressurization; Internal pressure is high, is the low temperature LNG liquid that just gets in the high pressure sphere tank V003, and its pressure and temperature is all very low; Pressurized gas in the high pressure sphere tank V002 get into high pressure sphere tank V003 through pneumatic ball valve GV07, GV08; Cryogenic liquide by among the high pressure sphere tank V003 liquefies again, after high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, closes pneumatic ball valve GV07, GV08, and this moment, high pressure sphere tank V002 internal pressure was very low;
(6), high pressure sphere tank V002 secondary release flow process: open pneumatic ball valve GV02, unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV02 in the high pressure sphere tank V002, is liquefied again by cryogenic liquide in the Cryo Heat Insulation storage tank V001;
When Cryo Heat Insulation storage tank V001 and high pressure sphere tank V002 pressure balance, close GV02;
(7), release flow process of high pressure sphere tank V003: open pneumatic ball valve GV07, GV08; High pressure sphere tank V003 is because through pressurization; Internal pressure is high, is the low temperature LNG liquid that just gets in the high pressure sphere tank V002, and its pressure and temperature is all very low; Pressurized gas in the high pressure sphere tank V003 get into high pressure sphere tank V002 through pneumatic ball valve GV08, GV07; Cryogenic liquide by among the high pressure sphere tank V002 liquefies again, after high pressure sphere tank V002, high pressure sphere tank V003 pressure balance, closes pneumatic ball valve GV07, GV08, and this moment, high pressure sphere tank V003 internal pressure was very low;
(8), high pressure sphere tank V003 secondary release flow process: open pneumatic ball valve GV05; Unnecessary gas flows back to Cryo Heat Insulation storage tank V001 through GV05 in the high pressure sphere tank V003; Again liquefied by cryogenic liquide in the Cryo Heat Insulation storage tank V001, when Cryo Heat Insulation storage tank V001 and high pressure sphere tank V003 pressure balance, close GV05.
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| CN111336403A (en) * | 2020-03-30 | 2020-06-26 | 日照海达尔加气设备有限公司 | Filling method of micro-power-consumption low-temperature liquid filling system |
| CN112050073A (en) * | 2020-07-29 | 2020-12-08 | 邯郸钢铁集团有限责任公司 | Liquid storage tank pressurizing and depressurizing method |
| CN114087537A (en) * | 2020-08-24 | 2022-02-25 | 安瑞科(廊坊)能源装备集成有限公司 | Temperature control device for LNG (liquefied Natural gas) filling and LNG filling method |
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| CN114087537A (en) * | 2020-08-24 | 2022-02-25 | 安瑞科(廊坊)能源装备集成有限公司 | Temperature control device for LNG (liquefied Natural gas) filling and LNG filling method |
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| CN102650373B (en) | 2013-06-12 |
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