CN105674056A - Methane recovering system and recovering method - Google Patents
Methane recovering system and recovering method Download PDFInfo
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- CN105674056A CN105674056A CN201610101846.3A CN201610101846A CN105674056A CN 105674056 A CN105674056 A CN 105674056A CN 201610101846 A CN201610101846 A CN 201610101846A CN 105674056 A CN105674056 A CN 105674056A
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- methane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
Abstract
The invention relates to a methane recovering system and a recovering method. The methane recovering system comprises a heat exchanger for receiving methane gas, wherein the heat exchanger is composed of at least two channels; an inlet of a first channel is used for receiving the methane gas; an outlet of the first channel is connected with an inlet of a compression device; an inlet of a second channel is connected with an outlet of the compression device; an outlet of the second channel is connected with a gas-liquid separation device through a throttling device; an exhaust valve is arranged at a gas outlet of the gas-liquid separation device; the exhaust valve is connected with the inlet of the first channel of the heat exchanger; a liquid drainage valve is arranged at a liquid outlet of the gas-liquid separation device; the liquid drainage valve is connected with a methane storage tank; and in addition, the opening degree of the exhaust valve controls opening and closing of the liquid drainage valve. The methane recovering system and the recovering method save the electricity consumption and pump precooling energy which are generated during pump transportation when enabling the energy to be fully recovered and utilized.
Description
Technical field
The present invention relates to the technical field of gas recovery recycling, refer in particular to the recovery being applied in vaporised gas (BOG) in natural gas liquids (LNG) storage and transportation.
Background technology
Natural gas liquids (LNG) main component is methane, being recognized is the energy the cleanest on the earth, colourless, tasteless, nontoxic and non-corrosiveness, its volume is about 1/625 with amount gaseous natural gas volume, and the weight of natural gas liquids is only about the 45% of same volume water. Natural gas liquids is natural gas via compression, be cooled to its boiling temperature after become liquid, usual LNG storage subzero 161.5 degrees Celsius, in the low temperature of about 0.1MPa storage storage tank, transport with special purpose ship or tank wagon, it may also be useful to time gasifies again. Natural gas liquids is very little to atmospheric pollution after burning, and the heat released is big, so natural gas liquids is a kind of more advanced energy.
At present in LNG ship oceangoing ship, tank car transportation and LNG filling, uninstall process, due to the heat transmission that the huge temperature difference between envrionment temperature and low temperature LNG produces, the precooling of station system and other reason, the LNG of low temperature can constantly by thermogenesis vaporised gas (being called for short BOG). Although the low-temperature (low temperature) vessel storing LNG has thermal insulation layer; but still cannot avoid the impact of outer heat, cause producing BOG, and the increase of BOG makes the pressure increase of system; once pressure exceedes the operating pressure that storage tank allows, it is necessary to start safeguard protection device release BOG thus storage tank is reduced pressure.
Existing methane gas way of recycling comprise gasification methane gas out through with air heat exchange after enter urban pipe network or use compressor these methane gass become the methane gas product that CNG(pressure is greater than 20MPa). Entering urban pipe network scheme needs LNG filling station near urban pipe network, is not suitable for by common LNG filling station; Make CNG product market value lower, and accumulating is complicated, compression power consumption is higher, equipment takes up an area bigger. Also the cold sources such as liquid nitrogen are utilized to be cooled by methane, again low temperature methane liquid reuse is turned into, but the method need to arrange separately cold generation device, investment and operation power consumption are higher, flow process is complicated and takes up an area bigger, the cost of the methane reclaimed is higher, and the rate of recovery is low, causes the waste of the energy to a certain extent.In addition, owing to LNG filling station methane gas release point is more, each discharges the release frequency of point and the tolerance of release every time and pressure and is subject to multiple conditionality, therefore mostly takes Artificial Control method, not only add human cost but also inefficiency, there is potential safety hazard.
Summary of the invention
For this reason, technical problem to be solved by this invention is to overcome in prior art to reclaim problem that when diffusing methane, organic efficiency is low thus provides one not only can improve the rate of recovery, and the recovery system of the simple methane of recovery system and recovery method.
For solving the problems of the technologies described above, a kind of methane recovery system of the present invention, described system comprises the heat-exchanger rig receiving methane gas, described heat-exchanger rig comprises at least two passages, wherein the entrance of first channel is for receiving methane gas, the outlet of first channel is connected with the entrance of compression device, the entrance of second passage is connected with the outlet of described compression device, the outlet of second passage is connected with gas-liquid separation device by throttling set, the air outlet of described gas-liquid separation device is provided with vent valve, described vent valve is connected with the first channel entrance of described heat-exchanger rig, the liquid outlet of described gas-liquid separation device is provided with tapping valve, described tapping valve is connected with methane storage tank, and the aperture of described vent valve controls the keying of described tapping valve.
In one embodiment of the invention, the first channel entrance of described heat-exchanger rig is connected with described methane storage tank or pump pond.
In one embodiment of the invention, the second passage outlet of described heat-exchanger rig is connected with described throttling set by trip valve.
In one embodiment of the invention, the outlet of described heat-exchanger rig first channel is connected by the entrance of gasifier with described compression device.
In one embodiment of the invention, described gas-liquid separation device is provided with liquid level detection device, and described liquid level detection device controls described vent valve and the aperture of described tapping valve.
In one embodiment of the invention, when the liquid level of described gas-liquid separation device reaches pre-determined range, turn described vent valve gradually down, when the fluid pressure of described gas-liquid separation device and described methane storage tank enter hydraulic pressure difference rise to setting range time, open described tapping valve gradually and start discharge opeing; When the liquid level of described gas-liquid separation device is less than pre-determined range, tune up described vent valve gradually, when fluid pressure and the methane storage tank of described gas-liquid separation device enters hydraulic pressure difference not when setting range, close little of closing tapping valve completely gradually, stop discharge opeing.
In one embodiment of the invention, the air outlet of described gas-liquid separation device is provided with the first manual modulation valve, and described first manual modulation valve is in parallel with described vent valve; The liquid outlet of described gas-liquid separation device is provided with the 2nd manual modulation valve, and described 2nd manual modulation valve is in parallel with described tapping valve.
Present invention also offers a kind of methane recovery method, comprise the steps: step S1: enter processed compressed after methane gas to be recycled is carried out heat exchange intensification and form high pressure methane gas; Step S2: described high pressure methane gas is carried out heat exchange cooling and forms high pressure low temperature methane gas; Step S3: described high pressure low temperature methane gas is carried out the mixture that step-down process forms step-down low temperature methane gas and methane liquid, described mixture is carried out separation and forms methane gas and methane liquid, wherein said methane gas returns step S1 by vent valve and carries out circular treatment, methane liquid is reclaimed by described tapping valve, and by regulating the aperture of described vent valve to control the keying of described tapping valve when reclaiming methane liquid.
In one embodiment of the invention, in described step S1, the methane gas reclaimed is carried out, and pressure monitoring determines whether enter processed compressed step, if pressure is in setting range, then methane gas after heat exchanging carries out processed compressed, if pressure is not in setting range, then the methane gas after stopping heat exchanging carrying out processed compressed.
In one embodiment of the invention, in described step S3, when reclaiming methane liquid, if the liquid level of methane liquid is in stated limit, and fluid pressure is with entering hydraulic pressure difference also when setting range wait what collect, reclaims methane liquid.
The technique scheme of the present invention has the following advantages compared to existing technology:
Methane recovery system of the present invention and recovery method, utilize the cold energy of BOG for compression device exit gas cooling, effectively make use of cold source, and carry LNG liquid by pressure difference, the enable electricity consumption produced when simultaneously also saving pump delivery and the pre-cold energy of pump obtaining fully recycling, achieves safety and the organic efficiency of technique simultaneously by control device.
Accompanying drawing explanation
In order to make the content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the schematic diagram of methane recovery system described in the embodiment of the present invention one;
Fig. 2 is the schematic diagram of methane recovery system described in the embodiment of the present invention two;
Fig. 3 is the schematic diagram of methane recovery system described in the embodiment of the present invention three.
Embodiment
Embodiment one:
As shown in Figure 1, present embodiments provide a kind of methane recovery system, described system comprises the heat-exchanger rig 11 receiving methane gas, described heat-exchanger rig 11 comprises at least two passages, wherein the entrance of first channel is for receiving methane gas, the outlet of first channel is connected with the entrance of compression device 12, the entrance of second passage is connected with the outlet of described compression device 12, the outlet of second passage is connected with gas-liquid separation device 14 by throttling set 13, the air outlet of described gas-liquid separation device 14 is provided with vent valve 18, described vent valve 18 is connected with the first channel entrance of described heat-exchanger rig 11, the liquid outlet of described gas-liquid separation device 14 is provided with tapping valve 19, described tapping valve 19 is connected with methane storage tank 15, and the aperture of described vent valve 18 controls the keying of described tapping valve 19.
Above-mentioned is core technology scheme of the present invention, methane recovery system of the present invention comprises heat-exchanger rig 11, compression device 12, throttling set 13 and gas-liquid separation device 14, wherein said heat-exchanger rig 11 comprises at least two passages, wherein the entrance of first channel is for receiving methane gas, the outlet of first channel is connected with the entrance of compression device 12, the low-temp low-pressure methane gas received is heated up through heat exchange to be flowed in described compression device 12, warming high-pressure methane gas is formed by the compression of described compression device 12, the entrance of second passage is connected with the outlet of described compression device 12, warming high-pressure methane gas forms cooling high pressure methane gas through the low-pressure low-temperature methane gas heat exchange that second passage and described first channel are discharged, due to make use of the cold energy of BOG be described compression device 12 exit gas cooling, therefore energy obtains sufficient recycling, the outlet of second passage is connected with gas-liquid separation device 14 by throttling set 13, described cooling high pressure methane gas is lowered the temperature through the throttling action step-down of described throttling set 13, it is changed into the mixture of step-down low temperature methane gas and methane liquid, described mixture is separated into methane gas and methane liquid in described gas-liquid separation device 14, the air outlet of described gas-liquid separation device 14 is provided with vent valve 18, described vent valve 18 is connected with the first channel entrance of described heat-exchanger rig 11, can control in the first channel that described methane gas flows into described heat-exchanger rig 11 by described vent valve 18, be conducive to continuing to recycle, it is to increase the rate of recovery,The liquid outlet of described gas-liquid separation device 14 is provided with tapping valve 19, described tapping valve 19 is connected with described methane storage tank 15, and the aperture of described vent valve 18 controls the keying of described tapping valve 19, such that it is able to avoid reclaiming methane liquid by liquid pump, not only enable obtain sufficient recycling, improve organic efficiency, the electricity consumption produced when also saving pump delivery and the pre-cold energy of pump.
The first channel entrance of described heat-exchanger rig 11 is connected with described methane storage tank 15 or pump pond 16, make all can to flow into from the fresh BOG gas of described methane storage tank 15 and described pump pond 16 in the first channel of described heat-exchanger rig 11, due to make use of the cold energy of BOG be described compression device 12 exit gas cooling, therefore energy obtains sufficient recycling. In addition, the fresh BOG gas of described methane storage tank 15 is provided with pressure monitoring device, and this pressure monitoring device controls the keying of described compression device 12. When the BOG pressure that storage tank comes reaches 0.7MPa-1.2MPa, described compression device 12 opened by interlocking, when the BOG pressure that storage tank comes is reduced to 0.3MPa-0.7MPa, compresses device 12, thus achieved the safety of technique by control device described in interlocking close.
The first channel outlet of described heat-exchanger rig 11 is provided with device for detecting temperature, and described device for detecting temperature automatic interlock controls the keying of described compression device 12. When the first channel temperature out of heat-exchanger rig 11 reaches subzero 10 DEG C--when 35 DEG C, interlocking can open described compression device 12, when first channel temperature out reaches subzero 10 DEG C--when subzero 20 DEG C, interlocking stops described compression device 12, is thus achieved the safety of technique by control device.
The second passage outlet of described heat-exchanger rig 11 is connected with described throttling set 13 by trip valve 17, and described trip valve 17 is associated with the keying of described compression device 12. Described gas-liquid separation device 14 is provided with pressure monitoring device, and described pressure monitoring device controls unlatching or the closedown of described compression device 12. Specifically, described pressure monitoring device controls the keying of described compression device 12 and heat-exchanger rig 11 second passage goes out the closedown of head emergent cut-off valve 17. When the pressure of gas-liquid separation device 14 reaches high limit 1.0 1.6MPa of storage tank, interlocking stops compression device 12 and closes the trip valve 17 in the outlet of heat-exchanger rig 11 second passage, after pressure is reduced to 1.0 1.6MPa, interlocking can be opened compression device 12 and open emergency cutting off valve 17.
Described gas-liquid separation device 14 is provided with liquid level detection device, and described liquid level detection device controls the aperture of described vent valve 18 and described tapping valve 19. Specifically, when the liquid level of described gas-liquid separation device 14 reaches 50%--99%, close little gas-liquid separation device 14 exit gas vent valve 18 gradually, when the fluid pressure of gas-liquid separation device 14 and described methane storage tank 15 enter hydraulic pressure difference rise to 0.05 0.25MPa time, the tapping valve 19 opening described gas-liquid separation device 14 gradually starts discharge opeing; When the liquid level of described gas-liquid separation device 14 reaches 1%--49%, open big described gas-liquid separation device 14 exit gas vent valve 18 gradually, when described gas-liquid separation device 14 fluid pressure and methane storage tank 15 enter hydraulic pressure difference drop to 0.05 0.25MPa time, close little of closing tapping valve 19 completely gradually, stop discharge opeing.
The open liquid level by described gas-liquid separation device 14 and described gas-liquid separation device 14 fluid and methane storage tank 15 of the outlet tapping valve 19 of described gas-liquid separation device 14 enter hydraulic pressure difference co-controlling, when above two conditions meet jointly, just can open tapping valve 19;When above two conditions have any condition to reach valve-off requirement, all automatically close tapping valve 19, thus achieved the safety of technique by control device. Described compression device 12 stop by the BOG atmospheric pressure of described methane storage tank 15, the first channel temperature out of described heat-exchanger rig 11 and the pressure-controlling of described gas-liquid separation device 14, when among three, any one condition exists, described compression device 12 stops all automatically.
Embodiment two:
Embodiment two is the improvement made on the basis of embodiment one, in order to the system of perfect recovery methane gas, the methane gas before entering described compression device 12 is improved in the system of embodiment one, the following detailed description of:
As shown in Figure 2, the outlet of described heat-exchanger rig 11 first channel is connected by the entrance of gasifier 20 with described compression device 12, the temperature of gas can be improved, such that it is able to the exit gas ensureing described heat-exchanger rig 11 first channel meets the requirement of described compression device 12 import by described air gasification agent 20.
Embodiment three:
The present embodiment additionally provides a kind of methane recovery system, in order to the system of perfect recovery methane gas, have employed manual mode in order to prevent automatic valve from going wrong and regulate in the system of embodiment two, the following detailed description of:
As shown in Figure 3, the air outlet of described gas-liquid separation device 13 is provided with the first manual modulation valve 21, and described first manual modulation valve 21 is in parallel with described vent valve 18, manual mode can be adopted to regulate to prevent automatic valve goes wrong; The liquid outlet of described gas-liquid separation device 13 is provided with the 2nd manual modulation valve 22, and described 2nd manual modulation valve 22 is in parallel with described tapping valve 19, manual mode can be adopted to regulate to prevent automatic valve goes wrong.
In the present embodiment, described vent valve 18 is realizing automatic regulation of gas valve or automatic open and close valve, and described tapping valve 19 is automatic liquid adjusting valve or automatic open and close valve.
Embodiment four:
The present embodiment provides a kind of methane recovery method, utilizes any one of methane recovery system recoveries methane gas of embodiment one, embodiment two, embodiment three, and it specifically comprises the steps:
Step S1: enter processed compressed after methane gas to be recycled is carried out heat exchange intensification and form high pressure methane gas; Step S2: described high pressure methane gas is carried out heat exchange cooling and forms high pressure low temperature methane gas; Step S3: described high pressure low temperature methane gas is carried out the mixture that step-down process forms step-down low temperature methane gas and methane liquid, described mixture is carried out separation and forms methane gas and methane liquid, wherein said methane gas returns step S1 by vent valve 18 and carries out circular treatment, methane liquid is reclaimed by described tapping valve 19, and by regulating the aperture of described vent valve 18 to control the keying of described tapping valve 19 when reclaiming methane liquid.
Methane recovery method described in the present embodiment, in described step S1, enters processed compressed and forms high pressure methane gas after methane gas to be recycled is carried out heat exchange intensification; In described step S2, described high pressure methane gas carrying out heat exchange cooling and forms high pressure low temperature methane gas, be that the exit gas after compression is lowered the temperature owing to make use of the cold energy of BOG, therefore energy obtains sufficient recycling; In described step S3, described high pressure low temperature methane gas is carried out the mixture that step-down process forms step-down low temperature methane gas and methane liquid, described mixture is carried out separation and forms methane gas and methane liquid, wherein said methane gas returns step S1 by vent valve 18 and carries out circular treatment, can continue to recycle, therefore be conducive to improving the rate of recovery;Methane liquid is reclaimed by described tapping valve 19, and by regulating the aperture of described vent valve 18 to control the keying of described tapping valve 19 when reclaiming methane liquid, thus avoid reclaiming methane liquid by liquid pump, not only enable obtain sufficient recycling, improve organic efficiency, the electricity consumption produced when also saving pump delivery and the pre-cold energy of pump.
In the present embodiment, in described step S1, the methane gas reclaimed is carried out, and pressure monitoring determines whether enter processed compressed step, if pressure is in setting range, then methane gas after heat exchanging carries out processed compressed, if pressure is not in setting range, then the methane gas after stopping heat exchanging carrying out processed compressed, is achieved the safety of technique by control device. In described step S3, when reclaiming methane liquid, if the liquid level of methane liquid is in stated limit, and fluid pressure with enter hydraulic pressure difference also when pre-determined range wait what collect, reclaim methane liquid, owing to carrying LNG liquid by pressure difference, enable obtain the electricity consumption and the pre-cold energy of pump recycling fully and also save pump delivery.
Heat-exchanger rig 11 of the present invention is interchanger, and described compression device 12 is compressor, and described throttling set 13 is throttling valve, and described gas-liquid separation device 14 is knockout drum.
To sum up, above technical scheme of the present invention has the following advantages:
1. methane recovery system of the present invention, comprise heat-exchanger rig, compression device, throttling set and gas-liquid separation device, wherein said heat-exchanger rig comprises at least two passages, wherein the entrance of first channel is for receiving methane gas, the outlet of first channel is connected with the entrance of compression device, the low-temp low-pressure methane gas received is heated up through heat exchange to be flowed in described compression device, warming high-pressure methane gas is formed by the compression of described compression device, the entrance of second passage is connected with the outlet of described compression device, warming high-pressure methane gas forms cooling high pressure methane gas through the low-pressure low-temperature methane gas heat exchange that second passage and described first channel are discharged, due to make use of the cold energy of BOG be described compression device exit gas cooling, therefore energy obtains sufficient recycling, the outlet of second passage is connected with gas-liquid separation device by throttling set, described cooling high pressure methane gas is lowered the temperature through the throttling action step-down of described throttling set, it is changed into the mixture of step-down low temperature methane gas and methane liquid, described mixture is separated into methane gas and methane liquid in described gas-liquid separation device, the air outlet of described gas-liquid separation device is provided with vent valve, described vent valve is connected with the first channel entrance of described heat-exchanger rig, can control in the first channel that described methane gas flows into described heat-exchanger rig by described vent valve, be conducive to continuing to recycle, improve the rate of recovery, the liquid outlet of described gas-liquid separation device is provided with tapping valve, described tapping valve is connected with described methane storage tank, and the aperture of described vent valve controls the keying of described tapping valve, such that it is able to avoid reclaiming methane liquid by liquid pump, not only enable obtain sufficient recycling, improve organic efficiency, the electricity consumption produced when also saving pump delivery and the pre-cold energy of pump.
2. methane recovery method of the present invention, in described step S1, enters processed compressed and forms high pressure methane gas after methane gas to be recycled is carried out heat exchange intensification; In described step S2, described high pressure methane gas carrying out heat exchange cooling and forms high pressure low temperature methane gas, be that the exit gas after compression is lowered the temperature owing to make use of the cold energy of BOG, therefore energy obtains sufficient recycling;In described step S3, described high pressure low temperature methane gas is carried out the mixture that step-down process forms step-down low temperature methane gas and methane liquid, described mixture is carried out separation and forms methane gas and methane liquid, wherein said methane gas returns step S1 by vent valve and carries out circular treatment, can continue to recycle, therefore be conducive to improving the rate of recovery; Methane liquid is reclaimed by described tapping valve, and by regulating the aperture of described vent valve to control the keying of described tapping valve when reclaiming methane liquid, thus avoid reclaiming methane liquid by liquid pump, not only enable obtain sufficient recycling, improve organic efficiency, the electricity consumption produced when also saving pump delivery and the pre-cold energy of pump.
Obviously, above-described embodiment is only for example is clearly described, not to the restriction of the mode of enforcement. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without the need to also cannot all enforcement modes be given exhaustive. And the apparent change thus extended out or variation are still in the protection domain of the invention.
Claims (10)
1. a methane recovery system, described system comprises the heat-exchanger rig receiving methane gas, described heat-exchanger rig comprises at least two passages, wherein the entrance of first channel is for receiving methane gas, the outlet of first channel is connected with the entrance of compression device, the entrance of second passage is connected with the outlet of described compression device, the outlet of second passage is connected with gas-liquid separation device by throttling set, it is characterized in that: the air outlet of described gas-liquid separation device is provided with vent valve, described vent valve is connected with the first channel entrance of described heat-exchanger rig, the liquid outlet of described gas-liquid separation device is provided with tapping valve, described tapping valve is connected with methane storage tank, and the aperture of described vent valve controls the keying of described tapping valve.
2. methane recovery system according to claim 1, it is characterised in that: the first channel entrance of described heat-exchanger rig is connected with described methane storage tank or pump pond.
3. methane recovery system according to claim 1, it is characterised in that: the second passage outlet of described heat-exchanger rig is connected with described throttling set by trip valve.
4. methane recovery system according to claim 1, it is characterised in that: the outlet of described heat-exchanger rig first channel is connected by the entrance of gasifier with described compression device.
5. methane recovery system according to claim 1, it is characterised in that: described gas-liquid separation device is provided with liquid level detection device, and described liquid level detection device controls described vent valve and the aperture of described tapping valve.
6. methane recovery system according to claim 5, it is characterized in that: when the liquid level of described gas-liquid separation device reaches pre-determined range, turn described vent valve gradually down, when the fluid pressure of described gas-liquid separation device and described methane storage tank enter hydraulic pressure difference rise to setting range time, open described tapping valve gradually and start discharge opeing; When the liquid level of described gas-liquid separation device is less than pre-determined range, tune up described vent valve gradually, when fluid pressure and the methane storage tank of described gas-liquid separation device enters hydraulic pressure difference not when setting range, close little of closing tapping valve completely gradually, stop discharge opeing.
7. methane recovery system according to claim 1, it is characterised in that: the air outlet of described gas-liquid separation device is provided with the first manual modulation valve, and described first manual modulation valve is in parallel with described vent valve;The liquid outlet of described gas-liquid separation device is provided with the 2nd manual modulation valve, and described 2nd manual modulation valve is in parallel with described tapping valve.
8. a methane recovery method, it is characterised in that, comprise the steps:
Step S1: enter processed compressed after methane gas to be recycled is carried out heat exchange intensification and form high pressure methane gas;
Step S2: described high pressure methane gas is carried out heat exchange cooling and forms high pressure low temperature methane gas;
Step S3: described high pressure low temperature methane gas is carried out the mixture that step-down process forms step-down low temperature methane gas and methane liquid, described mixture is carried out separation and forms methane gas and methane liquid, wherein said methane gas returns step S1 by vent valve and carries out circular treatment, methane liquid is reclaimed by described tapping valve, and by regulating the aperture of described vent valve to control the keying of described tapping valve when reclaiming methane liquid.
9. methane recovery method according to claim 8, it is characterized in that: in described step S1, the methane gas reclaimed is carried out, and pressure monitoring determines whether enter processed compressed step, if pressure is in setting range, then methane gas after heat exchanging carries out processed compressed, if pressure is not in setting range, then the methane gas after stopping heat exchanging carrying out processed compressed.
10. methane recovery method according to claim 8, it is characterised in that: in described step S3, when reclaiming methane liquid, if the liquid level of methane liquid is in stated limit, and fluid pressure is with entering hydraulic pressure difference also when setting range wait what collect, reclaims methane liquid.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543368A (en) * | 2017-07-21 | 2018-01-05 | 中国科学院理化技术研究所 | A kind of remaining BOG gases recycling system |
| CN110220339A (en) * | 2019-05-14 | 2019-09-10 | 绍兴西爱西尔数控科技有限公司 | A kind of refrigerant recovery system with function of measuring |
| CN110776967A (en) * | 2019-11-13 | 2020-02-11 | 宁波镇海合冰能源技术有限公司 | Liquid natural gas separation and recovery device |
| CN114591131A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气股份有限公司 | Device and method for recovering methane |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2852078A1 (en) * | 1978-12-01 | 1980-06-12 | Linde Ag | METHOD AND DEVICE FOR COOLING NATURAL GAS |
| CN102155615A (en) * | 2011-01-24 | 2011-08-17 | 成都深冷科技有限公司 | LNG (liquefied natural gas) pump-free air-entrapping method with BOG (boil off gas) recycling function and LNG pump-free air-entrapping device |
| CN104696700A (en) * | 2015-03-11 | 2015-06-10 | 新奥气化采煤有限公司 | Methane gas recycling system and methane gas recycling method |
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
| CN104792114A (en) * | 2015-04-10 | 2015-07-22 | 四川金科深冷设备工程有限公司 | BOG re-liquefaction process and re-liquefaction recovery system thereof |
| CN104819379A (en) * | 2015-04-21 | 2015-08-05 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery control method |
| CN105042327A (en) * | 2015-07-02 | 2015-11-11 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling method |
-
2016
- 2016-02-24 CN CN201610101846.3A patent/CN105674056A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2852078A1 (en) * | 1978-12-01 | 1980-06-12 | Linde Ag | METHOD AND DEVICE FOR COOLING NATURAL GAS |
| CN102155615A (en) * | 2011-01-24 | 2011-08-17 | 成都深冷科技有限公司 | LNG (liquefied natural gas) pump-free air-entrapping method with BOG (boil off gas) recycling function and LNG pump-free air-entrapping device |
| CN104696700A (en) * | 2015-03-11 | 2015-06-10 | 新奥气化采煤有限公司 | Methane gas recycling system and methane gas recycling method |
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
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Application publication date: 20160615 |