CN105371103A - Combined type natural gas recovery system and method - Google Patents
Combined type natural gas recovery system and method Download PDFInfo
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- CN105371103A CN105371103A CN201510643183.3A CN201510643183A CN105371103A CN 105371103 A CN105371103 A CN 105371103A CN 201510643183 A CN201510643183 A CN 201510643183A CN 105371103 A CN105371103 A CN 105371103A
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- 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
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- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
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- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
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- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/028—Special adaptations of indicating, measuring, or monitoring equipment having the volume as the parameter
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- 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
- F17C13/04—Arrangement or mounting of valves
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- 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
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- 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
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- 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
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
- F17C2227/0344—Air cooling
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- 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
- F17C2227/039—Localisation of heat exchange separate on the pipes
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- 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
- F17C2227/04—Methods for emptying or filling
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- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/01—Intermediate tanks
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- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/037—Handling leaked fluid
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- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/044—Avoiding pollution or contamination
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention mainly relates to a natural gas recovery system and method with an adsorption method. The system mainly comprises a fan, heat exchangers, a buffer tank, a vacuum pump, a natural gas compressor, an ANG cylinder and the like. The combined type natural gas recovery system which is safe, efficient, economical and high in automation degree is provided for the disadvantages of safety and economical efficiency of compressed natural gas and liquefied natural gas, and the system can be in a vehicle-mounted type and is convenient to move and operate. Natural gas is charged in the buffer tank, and then the natural gas in the buffer tank is compressed at medium pressure to be stored in the absorption type gas cylinder; when outside pressure is lower than the pressure of the gas cylinder, the gas is desorbed to be supplied to the outside and can be used as energy; and the absorption type gas cylinder can be demounted and replaced, and continuous operation of the whole system is not influenced. The factors of residual cold recovery, oxygen content monitor and the like are fully considered.
Description
Technical field
The invention belongs to rock gas recovery technology field, especially comprise a kind of combined type rock gas reclaiming system, also relate to adsorption method rock gas recovery method.
Background technique
The rock gas that the accompanying natural gas gas that oil field produces at oil recovery process or natural gas line residual air and other natural gas leakages or discharge process produce, directly be disposed to sometimes in air, the discharge of these rock gases, not only be degrading environment, health is worked the mischief, but also the wasting of resources and economic loss can be caused.In recent years, along with domestic and international to the attention of environmental problem, have strict standard to the discharge of organic gas, the recycling of organic gas more and more seems important, is the emphasis problem that environmental worker studies to their Environmental capacity always.
The storage of rock gas mainly contains the modes such as LNG Liquefied natural gas (LNG), compressed natural gas (CNG), absorbed natural gas (ANG) and gas hydrates (NGH).Because LNG storage is higher to storage tank requirement, CNG pressure store is comparatively large, NGH forms speed slowly; and under ANG only needs to maintain normal temperature, mesolow condition usually; just be expected to the pressure of CNG1/6 (only needing single stage compression) the natural gas storing amount realizing being equivalent to CNG, therefore ANG stores safer energy-conservation.The factor affecting Adsorption Natural Gas effect mainly comprises: (1) performance of the adsorbent.General Requirements sorbent has larger specific surface area and equilibrium adsorption capacity; There is good adsorptive selectivity; There is certain mechanical strength and wear resistance; Stable performance, lower bed pressure drop, specific heat is large, and heat-transfer coefficient is large, and conductivity is high; Long service life etc.(2) structure of adsorbent equipment.(3) desorption and regeneration technique.
Technical characterstic according to the present invention retrieved domestic and foreign databases, and Chinese patent CN102826033A proposes a kind of mobile natural gas recovery vehicle (comprising Motor Vehicle and storage tank) and mobile natural gas recovering device and using method thereof.Chinese patent CN104357118A relates to a kind of method utilizing the method for pressure-variable adsorption to reclaim methane recovery efficiency in methane raising LNG Liquefied natural gas from LNG Liquefied natural gas purifying column non-condensible gas.Chinese patent CN103822091A proposes a kind of CNG Filling Station rock gas recoverying and utilizing method, can be used for CNG Filling Station, this several method ubiquity overpressure or required high deficiency to appointed condition.The present invention proposes a kind of combined type rock gas reclaiming system and method, rock gas is filled with in knock out drum, be compressed in adsorption type gas cylinder with middle pressure (not higher than 4MPa) by rock gas in knock out drum and store, when ambient pressure is lower than storage pressure, desorbing gas supply is extraneous.
Summary of the invention
The object of this invention is to provide a kind of combined type rock gas reclaiming system and method, for compression, the Security of LNG Liquefied natural gas and the inferior position of Economy, the present invention proposes a kind of safe, efficient, economic combined type rock gas reclaiming system and method, this system can make vehicle carried type, mobile, easy to operate, rock gas is filled with in knock out drum by the present invention, again rock gas in knock out drum is compressed in adsorption type gas cylinder with middle pressure and stores, when ambient pressure is lower than storage pressure, the desorbing gas supply external world can be used as the energy and uses.
Technological scheme of the present invention is as follows:
(1) a kind of combined type rock gas reclaiming system comprises: the accessories such as control valve, pressure transducer, thermometer, flowmeter, heat exchanger A, heat exchanger B, oxygen measurement probe, temperature transducer, knock out drum, vacuum pump, pressure vacuum vent valve, natural gas compressor, filter, ball valve, one-way valve, safety valve, pressure gauge, ANG gas cylinder and pipeline.
The flowmeter of 1. described a kind of combined type rock gas reclaiming system is used for recording volume flowrate and the cumulative volume flow of rock gas.
The heat exchanger of 2. described a kind of combined type rock gas reclaiming system divides heat exchanger A and heat exchanger B.
Further, described heat exchanger A carrys out temperature degree in system for rock gas and configures lower than during ambient temperature, can not configure under other service condition.Heat exchanger A be high-performance heat exchanger and when difference variation is large thermal strain little, >=5MPa ~ 6MPa pressure can be born.Heat exchanger A outer wrapping heat-accumulating material, major storage rock gas carrys out the cold of gas, makes gas and heat exchanger B to give vent to anger heat exchange.
Further, described heat exchanger B is air-cooled heat exchange, and it mainly makes natural gas compressor export gas temperature reduce.
The knock out drum top of 3. described a kind of combined type rock gas reclaiming system is provided with suction port, air outlet, pressure transducer, temperature transducer, oxygen measurement probe etc.
Further, described knock out drum pressure-bearing >=5MPa ~ 6MPa.
Further, described oxygen measurement probe is when in knock out drum, oxygen concentration is too high, the various control valve that automatically switches, opens vacuum pump, by gas discharging in knock out drum, improves security of system.
The vacuum pump of 4. described a kind of combined type rock gas reclaiming system is explosion-proof type vacuum pump, is mainly used in system buffer tank, the vacuumizing and emergent reduction system oxygen concentration of pipeline.
The natural gas compressor of 5. described a kind of combined type rock gas reclaiming system is variable-frequency type natural gas compressor, by knock out drum internal pressure size VFC natural gas compressor.
Further, described natural gas compressor outlet pressure is not higher than 5MPa ~ 6MPa.
The ball valve of 6. described a kind of combined type rock gas reclaiming system and safety valve, be mainly used in pressure release, prevent internal system pressure excessive, initiation potential.
The ANG gas cylinder of 7. described a kind of combined type rock gas reclaiming system is built with rock gas Special adsorbent AdsFOV-IV, and its specific surface area is 1500m
2/ g ~ 2800m
2/ g, gas cylinder pressure-bearing>=5MPa ~ 6MPa.
The features such as further, described rock gas Special adsorbent AdsFOV-IV has bigger serface, abundant microcellular structure, good heat conductivity, perfect heat-dissipating, and the cooling of adsorption and desorption process is rapid, can repeat more than 2000 times by adsorption-desorption.
Further, described ANG gas cylinder is full of rear replaceable ANG gas cylinder, and the ANG gas cylinder after being full of normally can use as the energy.
(2) in a kind of combined type rock gas reclaiming system, each equipment connection mode is as follows:
1. rock gas carrys out gas pipeline and is connected with flowmeter entrance.
2. flowmeter outlet is connected with heat exchanger A heat exchange pipeline entrance, and the outlet of heat exchanger A heat exchange pipeline is connected with knock out drum suction port.
3. knock out drum air outlet is connected with natural gas compressor suction port, air-inlet of vacuum pump.
4. natural gas compressor air outlet is connected with heat exchanger B entrance, and heat exchanger B outlet is connected with heat exchanger A suction port.
5. heat exchanger A air outlet is connected with filter inlet, and filter outlet is connected with ANG gas cylinder.
(3) a kind of recovery method of combined type rock gas reclaiming system
1., before system uses for the first time, control valve, unlatching vacuum pump, utilize vacuum pump to vacuumize knock out drum and pipeline, after exhausting vacuum, and control valve.
2. gas (rock gas or LNG Liquefied natural gas are come in scene, gas temperature is not higher than ambient temperature) under system vacuum effect, enter heat exchanger A heat exchange pipeline through control valve, pressure transducer, flowmeter etc., the cold that rock gas carrys out gas in heat exchanger A is stored by heat-accumulating material.
3. knock out drum is entered from heat exchanger A heat exchange pipeline rock gas out through control valve.
4. when gas pressure in knock out drum is higher than setting value (-0.01MPa ~-0.02MPa, concrete pressure set points adjusts when debugging according to the actual requirements again, determines) time, natural gas compressor starts, control valve is opened, lower the temperature in heat exchanger B after rock gas is compressed by natural gas compressor after control valve, flowmeter from knock out drum air outlet, again by heat exchanger A, the cold in absorption heat-exchange device A.
5. from heat exchanger A air outlet, rock gas out, through filter, control valve, one-way valve, is compressed in ANG gas cylinder.
6. when gas pressure in knock out drum is lower than setting value (-0.01MPa ~-0.02MPa adjusts when concrete pressure set points is debugged according to the actual requirements again, determines), close natural gas compressor, control valve, utilize knock out drum to store gas.
7. after an ANG gas cylinder is full of, close natural gas compressor, control valve, change the follow-up continuous operational system of ANG gas cylinder.
8., when in knock out drum, oxygen concentration is too high, the various control valve that automatically switches, unlatching vacuum pump, by gas discharging in knock out drum, improve security of system.
(4) beneficial effect of the present invention
1. the present invention utilizes ANG storing technology, under for LNG storage, CNG storage, NGH store, ANG stores and usually only needs to maintain normal temperature, mesolow condition, the natural gas storing amount realizing being equivalent to CNG is just expected to the pressure of CNG1/6 (only needing single stage compression), ANG stores safer energy-conservation, particularly adopt high-performance adsorbent, greatly improve the gas-storing capacity of ANG gas cylinder.
2. the present invention reclaims rock gas, and the rock gas after reclaiming can continue to use as the energy, plays the effect of protection of the environment and the minimizing wasting of resources and economic loss.
3. the present invention arranges high-performance heat exchanger, takes into full account that Yu Leng reclaims, and improves the gas-storing capacity of ANG gas cylinder further.
4. the present invention arranges heat exchanger, knock out drum, variable-frequency type natural gas compressor, system energy consumption is reduced greatly, and makes Dynamic System more steady.
5. automaticity of the present invention is high, can realize unattended operation, reduces labor intensity of operating staff, and improves system cloud gray model Security.
6. the present invention can make vehicle carried type, has the advantages such as portable, mobile, removable, monitoring, touch screen control.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of combined type rock gas reclaiming system flow chart.
Reference character lists as follows:
1,10,14,16,17,19,27-control valve; 2,11,24-pressure transducer; 3,5,7,9,25-thermometer; 4,20-flowmeter; 6-heat exchanger A; 8-heat exchanger B; 12-oxygen measurement probe; 13-temperature transducer; 15-knock out drum; 18-vacuum pump; 21-pressure vacuum vent valve; 22-natural gas compressor; 23-filter; 26-ball valve; 28-one-way valve; 29-safety valve; 30-pressure gauge; 31-ANG gas cylinder.
Embodiment
Be described further below in conjunction with accompanying drawing 1 pair of embodiments of the invention, but the present invention is not by the restriction of embodiment:
To the recycling of LNG Liquefied natural gas residual air, gas flow is 200m
3/ h, gas temperature, lower than ambient temperature, also 1 is described in detail by reference to the accompanying drawings by technical solution of the present invention.
(1) a kind of combined type rock gas reclaiming system comprises: control valve (1, 10, 14, 16, 17, 19, 27), pressure transducer (2, 11, 24), thermometer (3, 5, 7, 9, 25), flowmeter (4, 20), heat exchanger A (6), heat exchanger B (8), oxygen measurement probe (12), temperature transducer (13), knock out drum (15), vacuum pump (18), pressure vacuum vent valve (21), natural gas compressor (22), filter (23), ball valve (26), one-way valve (28), safety valve (29), pressure gauge (30), the accessories such as ANG gas cylinder (31) and pipeline.
The flowmeter (4,20) of 1. described a kind of combined type rock gas reclaiming system is used for recording volume flowrate and the cumulative volume flow of rock gas.
The heat exchanger of 2. described a kind of combined type rock gas reclaiming system divides heat exchanger A (6) and heat exchanger B (8).
Further, described heat exchanger A (6) carrys out temperature degree in system for rock gas and configures lower than during ambient temperature, can not configure under other service condition.Heat exchanger A (6) thermal strain for high-performance heat exchanger and when difference variation is large is little, can bear >=5MPa pressure.Heat exchanger A (6) outer wrapping heat-accumulating material, major storage rock gas carrys out the cold of gas, makes gas and heat exchanger B (8) to give vent to anger heat exchange.
Further, described heat exchanger B (8) is air-cooled heat exchange, and it mainly makes natural gas compressor (22) export gas temperature reduce.
Knock out drum (15) top of 3. described a kind of combined type rock gas reclaiming system is provided with suction port, air outlet, pressure transducer (11), temperature transducer (13), oxygen measurement probe (12) etc.
Further, described knock out drum (15) pressure-bearing >=5MPa.
Further, described oxygen measurement probe (12) is when in knock out drum (15), oxygen concentration is too high, automatically switch various control valve, open vacuum pump (18), by gas discharging in knock out drum (15), improve security of system.
The vacuum pump (18) of 4. described a kind of combined type rock gas reclaiming system is explosion-proof type vacuum pump, is mainly used in system buffer tank (15), the vacuumizing and emergent reduction system oxygen concentration of pipeline.
The natural gas compressor (22) of 5. described a kind of combined type rock gas reclaiming system is variable-frequency type natural gas compressor, by knock out drum (15) internal pressure size VFC natural gas compressor (22).
Further, described natural gas compressor (22) outlet pressure is not higher than 5MPa.
The ball valve (26) of 6. described a kind of combined type rock gas reclaiming system and safety valve (29), be mainly used in pressure release, prevent internal system pressure excessive, initiation potential.
The ANG gas cylinder (31) of 7. described a kind of combined type rock gas reclaiming system is built with rock gas Special adsorbent AdsFOV-IV, and its specific surface area is 1500m
2/ g ~ 2800m
2/ g, gas cylinder (31) pressure-bearing>=5MPa.
The features such as further, described rock gas Special adsorbent AdsFOV-IV has bigger serface, abundant microcellular structure, good heat conductivity, perfect heat-dissipating, and the cooling of adsorption and desorption process is rapid, can repeat more than 2000 times by adsorption-desorption.
Further, described ANG gas cylinder is full of rear replaceable ANG gas cylinder, and the ANG gas cylinder after being full of normally can use as the energy.
(2) in a kind of combined type rock gas reclaiming system, each equipment connection mode is as follows:
1. rock gas carrys out gas pipeline and is connected with flowmeter (4) entrance.
2. flowmeter (4) outlet is connected with heat exchanger A (6) heat exchange pipeline entrance, and the outlet of heat exchanger A (6) heat exchange pipeline is connected with knock out drum (15) suction port.
3. knock out drum (15) air outlet is connected with natural gas compressor (22) suction port, vacuum pump (18) suction port.
4. natural gas compressor (22) air outlet is connected with heat exchanger B (8) entrance, and heat exchanger B (8) outlet is connected with heat exchanger A (6) suction port.
5. heat exchanger A (6) air outlet is connected with filter (23) entrance, and filter (23) outlet is connected with ANG gas cylinder (31).
(3) a kind of recovery method of combined type rock gas reclaiming system
1. before system uses for the first time, closed control valve (1,17,27), close ball valve (26), open control valve (10,14,16,19), open anti-explosion vacuum pump (18), anti-explosion vacuum pump (18) is utilized to vacuumize knock out drum (15) and pipeline, after exhausting vacuum, closed control valve (14,16).
2. scene is carried out gas (LNG Liquefied natural gas residual air, gas flow is 200m
3/ h, gas temperature is lower than ambient temperature) under system vacuum effect, enter heat exchanger A (6) heat exchange pipeline through control valve (1), pressure transducer (2), flowmeter (4) etc., the cold that rock gas carrys out gas in heat exchanger A (6) is stored by heat-accumulating material.
3. knock out drum (15) is entered from heat exchanger A (6) heat exchange pipeline rock gas out through control valve (10).
4. when gas pressure in knock out drum (15) is higher than setting value (-0.01MPa ~-0.02MPa), natural gas compressor (22) starts, control valve (14,17,27) is opened, rock gas is lowered the temperature in heat exchanger B (8) by after natural gas compressor (22) compression after control valve (14), control valve (17), flowmeter (20) from knock out drum (15) air outlet, again by heat exchanger A (6), the cold in absorption heat-exchange device A (6).
5. from heat exchanger A (6) air outlet rock gas out through filter (23), control valve (27), one-way valve (28), be compressed in ANG gas cylinder (31).
6. when gas pressure in knock out drum (15) is lower than setting value (-0.01MPa ~-0.02MPa), close natural gas compressor (22), closed control valve (14), utilizes knock out drum (15) to store gas.
7. after an ANG gas cylinder (31) is full of, close natural gas compressor (22), closed control valve (14,27), change ANG gas cylinder (31) follow-up continuous operational system.
8. when in knock out drum (15), oxygen concentration reaches 0.5% ~ 1%, automatically switch various valve, i.e. closed control valve (1,17,27), close ball valve (26), open control valve (10,14,16,19), open anti-explosion vacuum pump (18), by gas discharging in knock out drum (15), oxygen concentration in emergent reduction system, improves security of system.
Claims (10)
1. a combined type rock gas reclaiming system, it is characterized in that: this system is by control valve (1, 10, 14, 16, 17, 19, 27), pressure transducer (2, 11, 24), thermometer (3, 5, 7, 9, 25), flowmeter (4, 20), heat exchanger A (6), heat exchanger B (8), oxygen measurement probe (12), temperature transducer (13), knock out drum (15), vacuum pump (18), pressure vacuum vent valve (21), natural gas compressor (22), filter (23), ball valve (26), one-way valve (28), safety valve (29), pressure gauge (30), the compositions such as ANG gas cylinder (31) and pipeline.
2. each equipment connection of a kind of combined type rock gas reclaiming system as claimed in claim 1, it is characterized in that: rock gas carrys out gas pipeline and is connected with flowmeter (4) entrance, flowmeter (4) outlet is connected with heat exchanger A (6) heat exchange pipeline entrance, the outlet of heat exchanger A (6) heat exchange pipeline is connected with knock out drum (15) suction port, knock out drum (15) air outlet and natural gas compressor (22) suction port, vacuum pump (18) suction port connects, natural gas compressor (22) air outlet is connected with heat exchanger B (8) entrance, heat exchanger B (8) outlet is connected with heat exchanger A (6) suction port, heat exchanger A (6) air outlet is connected with filter (23) entrance, filter (23) outlet is connected with ANG gas cylinder (31).
3. ANG gas cylinder (31) as claimed in claim 1, is characterized in that: ANG gas cylinder (31) is built with rock gas Special adsorbent AdsFOV-IV, and its specific surface area is 1500m
2/ g ~ 2800m
2/ g, gas cylinder (31) pressure-bearing>=5MPa ~ 6MPa; The features such as rock gas Special adsorbent AdsFOV-IV has bigger serface, abundant microcellular structure, good heat conductivity, perfect heat-dissipating, and the cooling of adsorption and desorption process is rapid, can repeat more than 2000 times by adsorption-desorption; ANG gas cylinder is full of rear replaceable ANG gas cylinder, and the ANG gas cylinder after being full of normally can use as the energy.
4. heat exchanger as claimed in claim 1, is characterized in that: heat exchanger divides heat exchanger A (6) and heat exchanger B (8); Heat exchanger A (6) carrys out temperature degree in system for rock gas and configures lower than during ambient temperature, can not configure under other service condition; Heat exchanger A (6) thermal strain for high-performance heat exchanger and when difference variation is large is little, can bear >=5MPa ~ 6MPa pressure; Heat exchanger A (6) outer wrapping heat-accumulating material, major storage rock gas carrys out the cold of gas, makes gas and heat exchanger B (8) to give vent to anger heat exchange; Heat exchanger B (8) is air-cooled heat exchange, and it mainly makes natural gas compressor (22) export gas temperature reduce.
5. knock out drum (15) as claimed in claim 1, is characterized in that: knock out drum (15) top is provided with suction port, air outlet, pressure transducer (11), temperature transducer (13), oxygen measurement probe (12) etc.; Knock out drum (15) pressure-bearing >=5MPa ~ 6MPa.
6. oxygen measurement probe (12) as claimed in claim 1, it is characterized in that: oxygen measurement probe (12) is when in knock out drum (15), oxygen concentration is too high, automatically switch various control valve, open vacuum pump (18), by gas discharging in knock out drum (15), improve security of system.
7. vacuum pump (18) as claimed in claim 1, it is characterized in that: vacuum pump (18) is explosion-proof type vacuum pump, to knock out drum (15), the vacuumizing and emergent reduction system oxygen concentration of pipeline before the system that is mainly used in uses for the first time.
8. natural gas compressor (22) as claimed in claim 1, it is characterized in that: natural gas compressor (22) is variable-frequency type natural gas compressor, by knock out drum (15) internal pressure size VFC natural gas compressor (22), natural gas compressor (22) outlet pressure is not higher than 5MPa ~ 6MPa.
9. ball valve (26) as claimed in claim 1 and safety valve (29), is characterized in that: ball valve (26) and safety valve (29) are mainly used in pressure release, prevent internal system pressure excessive, initiation potential.
10. the recovery method of a combined type rock gas reclaiming system, it is characterized in that: before system uses for the first time, closed control valve (1,27), close ball valve (26), open control valve (10,14,16,17,19), open anti-explosion vacuum pump (18), utilize anti-explosion vacuum pump (18) to vacuumize knock out drum (15) and pipeline, after exhausting vacuum, closed control valve (14,16); Gas (rock gas or LNG Liquefied natural gas are come in scene, gas temperature is not higher than ambient temperature) under system vacuum effect, enter heat exchanger A (6) heat exchange pipeline through control valve (1), pressure transducer (2), flowmeter (4) etc., the cold that rock gas carrys out gas in heat exchanger A (6) is stored by heat-accumulating material; Knock out drum (15) is entered through control valve (10) from heat exchanger A (6) heat exchange pipeline rock gas out; When gas pressure in knock out drum (15) is higher than setting value (-0.01MPa ~-0.02MPa), natural gas compressor (22) starts, control valve (14,27) is opened, rock gas is lowered the temperature in heat exchanger B (8) by after natural gas compressor (22) compression after control valve (14), control valve (17), flowmeter (20) from knock out drum (15) air outlet, again by heat exchanger A (6), the cold in absorption heat-exchange device A (6); From heat exchanger A (6) air outlet rock gas out through filter (23), control valve (27), one-way valve (28), be compressed in ANG gas cylinder (31); When gas pressure in knock out drum (15) is lower than setting value (-0.01MPa ~-0.02MPa), close natural gas compressor (22), closed control valve (14), utilizes knock out drum (15) to store gas; After an ANG gas cylinder (31) is full of, close natural gas compressor (22), closed control valve (14,27), change ANG gas cylinder (31) follow-up continuous operational system; When in knock out drum, oxygen concentration is too high, closed control valve (1,27), closes ball valve (26), opens control valve (10,14,16,17,19), open anti-explosion vacuum pump (18), oxygen concentration in emergent reduction system.
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