CN110686463A - Natural gas circulating refrigeration liquefaction device - Google Patents
Natural gas circulating refrigeration liquefaction device Download PDFInfo
- Publication number
- CN110686463A CN110686463A CN201910606214.6A CN201910606214A CN110686463A CN 110686463 A CN110686463 A CN 110686463A CN 201910606214 A CN201910606214 A CN 201910606214A CN 110686463 A CN110686463 A CN 110686463A
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- Prior art keywords
- pipe
- module
- natural gas
- fixed
- liquefaction
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000003345 natural gas Substances 0.000 title claims abstract description 36
- 238000005057 refrigeration Methods 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 46
- 239000000523 sample Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 13
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 9
- 239000005977 Ethylene Substances 0.000 claims description 9
- 238000010992 reflux Methods 0.000 abstract description 8
- 230000001681 protective effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 101100408352 Drosophila melanogaster Plc21C gene Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0244—Operation; Control and regulation; Instrumentation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a natural gas circulating refrigeration liquefaction device which comprises a conveying pipe and an electric cabinet, wherein an evaporator, a compressor and a condenser are sequentially arranged on the conveying pipe along the gas flowing direction, the outlet end of the conveying pipe is connected with a flow guide pipe, the front end of the flow guide pipe is connected with a liquefaction bottle, a reflux device is arranged on the liquefaction bottle, and the reflux device is connected with the electric cabinet. According to the natural gas circulating refrigeration liquefaction device disclosed by the invention, the return pipe is additionally arranged, so that the natural gas which is not completely liquefied is recycled and repeatedly liquefied, the efficiency of natural gas circulating refrigeration liquefaction is improved, and the utilization rate of energy is improved.
Description
Technical Field
The invention relates to a circulating refrigeration liquefaction device, in particular to a natural gas circulating refrigeration liquefaction device, and belongs to the field of natural gas equipment application.
Background
The natural gas is processed and cooled into liquid, thereby greatly facilitating transportation and storage and enabling long-distance transportation and trade of the natural gas to be possible.
The existing natural gas circulating refrigeration method mainly comprises three types, namely a cascade refrigeration cycle, a mixed refrigerant refrigeration cycle and an expander refrigeration cycle, however, in the natural gas circulating refrigeration process, part of gas can not be liquefied, so that the energy is wasted.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a natural gas circulation refrigeration liquefaction apparatus.
The invention realizes the aim by the following technical scheme, a natural gas circulating refrigeration liquefaction device comprises a conveying pipe and an electric cabinet, wherein an evaporator, a compressor and a condenser are sequentially arranged on the conveying pipe along the gas circulation direction, the outlet end of the conveying pipe is connected with a flow guide pipe, the front end of the flow guide pipe is connected with a liquefaction bottle, a reflux device is arranged on the liquefaction bottle and connected with the electric cabinet, the reflux device comprises a drainage pipe, an output pipe, a gas storage tank and a reflux pipe, the drainage pipe is communicated with the liquefaction bottle and arranged on the upper surface of the liquefaction bottle, the flow guide pipe is communicated with the drainage pipe, the output pipe is arranged on the drainage pipe and communicated with the drainage pipe, two ends of the gas storage tank are respectively provided with a gas inlet pipe and a gas outlet pipe, the gas inlet pipe is communicated, the gas pressure detection device is characterized in that a one-way valve is installed on the gas inlet pipe, an electronic pressure valve is installed on the gas outlet pipe, a gas pressure detection probe is installed in the gas storage tank, and a data line of the gas pressure detection probe is connected with the electric cabinet.
Preferably, be equipped with display module, control module and switch module in the regulator cubicle, display module with between the control module and the control module with install the division board between the switch module, install the display screen in the display module, install the PLC controller in the control module, install the switch in the switch module, gas pressure test probe with the display screen is established ties, the display screen with the PLC controller is established ties, the PLC controller with the switch is established ties, the switch with the electron pressure valve is established ties.
Preferably, the detection value of the gas pressure detection probe is 25MPa, and the control preset value of the PLC controller is 25 MPa.
Preferably, the draft tube is arranged on the draft tube in a downward inclination mode, and the angle of the downward inclination of the draft tube is 30-45 degrees.
Preferably, the evaporator is an ethylene evaporator, the compressor is an ethylene compressor, the condenser is an ethylene condenser, and the natural gas at the outlet end of the flow guide pipe meets the standard of GB18047-2000 compressed natural gas for vehicles.
Preferably, the backflow pipe and the conveying pipe connection end are internally provided with a one-way air outlet module, the one-way air outlet module comprises an embedded module, an outer convex module and a membrane structure, and the membrane structure is fixed between the embedded module and the outer convex module.
Preferably, be equipped with spacing groove and fixed slot No. one on the embedded module lateral wall, be equipped with spacing pipe and No. two fixed slots on the evagination module lateral wall, the membrane structure edge is equipped with two fixed blocks that are symmetrical structure, be equipped with on the membrane structure and be the crisscross incision of "ten", the fixed block both sides are the spiral respectively to be fixed in No. one fixed slot with in No. two fixed slots, spacing pipe spiral is fixed in the spacing inslot.
Preferably, a protective sleeve is arranged on the periphery of the data line, a protective sleeve through hole is formed in the side wall of the electrical cabinet, and the protective sleeve is spirally fixed on the protective sleeve through hole.
The invention has the beneficial effects that: according to the natural gas circulating refrigeration liquefaction device disclosed by the invention, the return pipe is additionally arranged, so that the natural gas which is not completely liquefied is recycled and repeatedly liquefied, the efficiency of natural gas circulating refrigeration liquefaction is improved, and the utilization rate of energy is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of an embedded module structure according to the present invention.
FIG. 3 is a schematic structural diagram of a male module according to the present invention.
FIG. 4 is a schematic structural view of a membrane of the present invention.
In the figure: 1. the device comprises a conveying pipe, 2, an evaporator, 3, a compressor, 4, a condenser, 5, a liquefaction bottle, 6, a flow guide pipe, 7, a drainage pipe, 8, an output pipe, 9, an air storage tank, 10, an air inlet pipe, 11, an air outlet pipe, 12, a return pipe, 13, a one-way valve, 14, an electronic pressure valve, 15, a gas pressure detection probe, 16, an electric cabinet, 17, a display module, 18, a control module, 19, a switch module, 20, a display screen, 21, a PLC (programmable logic controller), 22, a switch, 23, a separation plate, 24, a protective sleeve, 25, a data line, 26, a protective sleeve perforation, 27, a one-way air outlet module, 28, an embedded module, 29, an outer convex module, 30, a limiting groove, 31, a first fixing groove, 32, a limiting pipe, 33, a second fixing groove, 34, a fixing block, 35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, a natural gas circulating refrigeration liquefaction device includes a delivery pipe 1 and an electrical cabinet 16, an evaporator 2, a compressor 3 and a condenser 4 are sequentially disposed on the delivery pipe 1 along a gas flow direction, an outlet end of the delivery pipe 1 is connected with a flow guide pipe 6, a liquefaction bottle 5 is connected to a front end of the flow guide pipe 6, a reflux device is mounted on the liquefaction bottle 5 and connected with the electrical cabinet 16, the reflux device includes a drainage pipe 7, an output pipe 8, a gas storage tank 9 and a reflux pipe 12, the drainage pipe 7 is communicated with the liquefaction bottle 5 and mounted on an upper surface of the liquefaction bottle 5, the drainage pipe 6 is communicated with the drainage pipe 7, the output pipe 8 is mounted on the drainage pipe 7 and communicated with the drainage pipe 7, two ends of the gas storage tank 9 are respectively provided with a gas inlet pipe 10 and, the gas inlet pipe 10 is communicated with the output pipe 8, the gas outlet pipe 11 is communicated with the return pipe 12, the gas inlet pipe 10 is provided with a one-way valve 13, the gas outlet pipe 11 is provided with an electronic pressure valve 14, the gas storage tank 9 is internally provided with a gas pressure detection probe 15, and the gas pressure detection probe 15 is simultaneously connected with the electrical cabinet 16 through a data line 25.
Be equipped with display module 17, control module 18 and switch module 19 in the regulator cubicle 16, display module 17 with between the control module 18 and control module 18 with install division board 23 between the switch module 19, install display screen 20 in the display module 17, install PLC controller 21 in the control module 18, install switch 22 in the switch module 19, gas pressure test probe 15 with display screen 20 is established ties, display screen 20 with PLC controller 21 is established ties, PLC controller 21 with switch 22 is established ties, switch 22 with electron pressure valve 14 is established ties.
The incompletely liquefied natural gas enters the drainage tube 7, opens the one-way valve 13 and then flows into the gas storage tank 9.
The detection value of the gas pressure detection probe 15 is 25MPa, and the control preset value of the PLC 21 is 25 MPa.
When the natural gas in the gas storage tank 9 gathers more and more, the pressure in the gas storage tank 9 reaches 25MPa, at the moment, the gas pressure detection probe 15 displays the pressure value in the gas storage tank 9 on the display screen 20, the PLC 21 controls the switch 22 to open the electronic pressure valve 14, and the natural gas in the gas storage tank 9 flows back into the conveying pipe 1 along the return pipe 12.
The connection of the return pipe 12 to the transport pipe 1 is located at the front end of the evaporator 2, ensuring that the returned natural gas enters the normal liquefaction process.
The draft tube 6 is arranged on the draft tube 7 in a downward inclined mode, and the angle of the downward inclination of the draft tube 6 is 30-45 degrees.
The draft tube 6 is obliquely arranged, so that liquefied natural gas can flow into the liquefaction bottle 5.
The evaporator 2 is an ethylene evaporator, the compressor 3 is an ethylene compressor, the condenser 4 is an ethylene condenser, and the natural gas at the outlet end of the flow guide pipe 6 meets the standard of GB18047-2000 compressed natural gas for vehicles.
The backflow pipe 12 is connected with the conveying pipe 1 through a connecting end, a one-way air outlet module 27 is installed in the connecting end of the backflow pipe 12 and the conveying pipe 1, the one-way air outlet module 27 comprises an embedded module 28, an outer convex module 29 and a membrane structure 35, and the membrane structure 35 is fixed between the embedded module 28 and the outer convex module 29.
Be equipped with spacing groove 30 and fixed slot 31 on the embedded module 28 lateral wall, be equipped with spacing pipe 32 and No. two fixed slots 33 on the evagination module 29 lateral wall, membrane structure 35 edge is equipped with two fixed blocks 34 that are symmetrical structure, be equipped with on the membrane structure 35 and be "ten" crisscross incision 36, fixed block 34 both sides are the spiral respectively to be fixed in fixed slot 31 with in No. two fixed slots 33, spacing pipe 32 spiral is fixed in the spacing groove 30.
When the gas pressure in the return pipe 12 is greater than the pressure in the delivery pipe 1, the notch 36 is broken by the gas, and the natural gas in the return pipe 12 flows back into the delivery pipe 1.
The data line 25 periphery is equipped with lag 24, be equipped with lag perforation 26 on the regulator cubicle 16 lateral wall, lag 24 spiral is fixed on lag perforation 26.
The protective sheath 24 may prevent the data line 25 from breaking.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A natural gas circulation refrigeration liquefaction device which characterized in that: comprises a conveying pipe (1) and an electric cabinet (16), an evaporator (2), a compressor (3) and a condenser (4) are sequentially arranged on the conveying pipe (1) along the gas circulation direction, the outlet end of the conveying pipe (1) is connected with a flow guide pipe (6), the front end of the flow guide pipe (6) is connected with a liquefaction bottle (5), a backflow device is installed on the liquefaction bottle (5), the backflow device is connected with the electric cabinet (16), the backflow device comprises a drainage pipe (7), an output pipe (8), a gas storage tank (9) and a backflow pipe (12), the drainage pipe (7) is communicated with the liquefaction bottle (5) and installed on the upper surface of the liquefaction bottle (5), the flow guide pipe (6) is communicated with the drainage pipe (7), the output pipe (8) is installed on the drainage pipe (7) and communicated with the drainage pipe (7), the gas storage tank (9) both ends are equipped with intake pipe (10) and outlet duct (11) respectively, intake pipe (10) with output tube (8) intercommunication, outlet duct (11) with back flow (12) intercommunication, install check valve (13) on intake pipe (10), install electron pressure valve (14) on outlet duct (11), install gas pressure test probe (15) in gas storage tank (9), gas pressure test probe (15) while data line (25) with regulator cubicle (16) are connected.
2. The natural gas recycle refrigeration liquefaction plant of claim 1, characterized by: be equipped with display module (17), control module (18) and switch module (19) in regulator cubicle (16), display module (17) with between control module (18) and control module (18) with install division board (23) between switch module (19), install display screen (20) in display module (17), install PLC controller (21) in control module (18), install switch (22) in switch module (19), gas pressure test probe (15) with display screen (20) are established ties, display screen (20) with PLC controller (21) are established ties, PLC controller (21) with switch (22) are established ties, switch (22) with electron pressure valve (14) are established ties.
3. The natural gas circulation refrigeration liquefaction plant of claim 1 or claim 2, characterized in that: the detection value of the gas pressure detection probe (15) is 25MPa, and the control preset value of the PLC (21) is 25 MPa.
4. The natural gas recycle refrigeration liquefaction plant of claim 1, characterized by: the draft tube (6) is arranged on the draft tube (7) in a downward inclined mode, and the angle of the downward inclination of the draft tube (6) is 30-45 degrees.
5. The natural gas recycle refrigeration liquefaction plant of claim 1, characterized by: the evaporator (2) is an ethylene evaporator, the compressor (3) is an ethylene compressor, the condenser (4) is an ethylene condenser, and the outlet end natural gas of the guide pipe (6) meets the standard of GB18047-2000 compressed natural gas for vehicles.
6. The natural gas recycle refrigeration liquefaction plant of claim 1, characterized by: the backflow pipe (12) and a one-way air outlet module (27) is installed in the connecting end of the conveying pipe (1), the one-way air outlet module (27) comprises an embedded module (28), a convex module (29) and a membrane structure (35), and the membrane structure (35) is fixed between the embedded module (28) and the convex module (29).
7. The natural gas recycle refrigeration liquefaction plant of claim 6, characterized by: be equipped with spacing groove (30) and fixed slot (31) No. one on embedded module (28) lateral wall, be equipped with spacing pipe (32) and No. two fixed slots (33) on evagination module (29) lateral wall, membrane structure (35) edge is equipped with two fixed block (34) that are symmetrical structure, be equipped with on membrane structure (35) and be "ten" word crossing incision (36), fixed block (34) both sides are the spiral respectively to be fixed No. one fixed slot (31) with in No. two fixed slots (33), spacing pipe (32) spiral is fixed in spacing groove (30).
8. The natural gas recycle refrigeration liquefaction plant of claim 1, characterized by: the data line (25) periphery is equipped with lag (24), be equipped with lag perforation (26) on the regulator cubicle (16) lateral wall, lag (24) spiral is fixed on the lag perforation (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606214.6A CN110686463A (en) | 2019-07-05 | 2019-07-05 | Natural gas circulating refrigeration liquefaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606214.6A CN110686463A (en) | 2019-07-05 | 2019-07-05 | Natural gas circulating refrigeration liquefaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110686463A true CN110686463A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910606214.6A Pending CN110686463A (en) | 2019-07-05 | 2019-07-05 | Natural gas circulating refrigeration liquefaction device |
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| Country | Link |
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| CN (1) | CN110686463A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2718840A1 (en) * | 2008-04-11 | 2009-10-15 | Fluor Technologies Corporation | Methods and configuration of boil-off gas handling in lng regasification terminals |
| CN102221126A (en) * | 2011-06-14 | 2011-10-19 | 杨年盛 | Small household intelligent natural gas filling station |
| 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 |
| CN206637944U (en) * | 2017-03-10 | 2017-11-14 | 蚌埠市荣强压缩机制造有限公司 | A kind of recovery reliquefaction installation for BOG |
| CN109084526A (en) * | 2018-07-23 | 2018-12-25 | 中国科学院理化技术研究所 | VOCs liquefaction recovery system |
-
2019
- 2019-07-05 CN CN201910606214.6A patent/CN110686463A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2718840A1 (en) * | 2008-04-11 | 2009-10-15 | Fluor Technologies Corporation | Methods and configuration of boil-off gas handling in lng regasification terminals |
| CN102221126A (en) * | 2011-06-14 | 2011-10-19 | 杨年盛 | Small household intelligent natural gas filling station |
| 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 |
| CN206637944U (en) * | 2017-03-10 | 2017-11-14 | 蚌埠市荣强压缩机制造有限公司 | A kind of recovery reliquefaction installation for BOG |
| CN109084526A (en) * | 2018-07-23 | 2018-12-25 | 中国科学院理化技术研究所 | VOCs liquefaction recovery system |
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