CN202692601U - Lithium bromide pre-cooling liquefaction device - Google Patents
Lithium bromide pre-cooling liquefaction device Download PDFInfo
- Publication number
- CN202692601U CN202692601U CN 201220384606 CN201220384606U CN202692601U CN 202692601 U CN202692601 U CN 202692601U CN 201220384606 CN201220384606 CN 201220384606 CN 201220384606 U CN201220384606 U CN 201220384606U CN 202692601 U CN202692601 U CN 202692601U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- lithium bromide
- precool heat
- natural gas
- connects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 102
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003345 natural gas Substances 0.000 claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims description 17
- 210000000056 organ Anatomy 0.000 claims description 15
- 239000002826 coolant Substances 0.000 claims description 14
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 abstract description 5
- 230000002745 absorbent Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 19
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical group CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 6
- 239000003949 liquefied natural gas Substances 0.000 description 6
- 239000001294 propane Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model provides a lithium bromide pre-cooling liquefaction device. With the rapid development of the natural gas liquefaction industry, a higher requirement is proposed for natural gas liquefaction technology, and therefore, selection of a liquefaction flow mode directly influences LNG factory construction and operation economy. A natural gas liquefaction device with pre-cooling via a lithium bromide absorbent comprises a direct combustion type lithium bromide cold water set (1) with the lithium bromide absorbent, a pre-cooling heat exchanger (2), a cold box (3), and a refrigerant compressor (4), the direct combustion type lithium bromide cold water set is connected with the pre-cooling heat exchanger (2), the pre-cooling heat exchanger (2) is connected with the cold box, the cold box is connected with the refrigerant compressor; one end of the direct combustion type lithium bromide cold water set is connected with a refrigerant water inlet pipe, the other end of the direct combustion type lithium bromide cold water set is connected with a refrigerant water outlet pipe, the refrigerant water outlet pipe is connected with the water outlet end of the pre-cooling heat exchanger, and the refrigerant water inlet pipe is connected with the water inlet end of the pre-cooling heat exchanger. The lithium bromide pre-cooling liquefaction device is used as a natural gas liquefaction device.
Description
Technical field:
The utility model relates to a kind of by the lithium bromide precooling liquefying plant.
Background technology:
At present in the natural gas liquefaction flow scheme design, the hybrid refrigeration liquefaction flow path is used many, but the mix refrigerant liquefaction flow path is higher with Cascade phase specific energy consumption, in order to reduce energy consumption, the mix refrigerant liquefaction flow path with precooling occurred again on this basis, and be widely used.
Using more Pre-cooling Mode at present is propane or freon precooling, and wherein propane pre-cooling is more complicated than freon precooling Process flow, equipment is more; Propane or the used compressor reliability of freon precooling flow process are poor, and circulation precooling agent freon has harm to environment.
Natural gas is a kind of important energy source, because of the few clean energy resource that is called as of its environmental pollution.The volume of liquefied natural gas (LNG) only has with 1/625 of amount gas volume, thereby after its liquefaction, can reduce and store and cost of transportation, and can improve the combustion value of unit volume.
Since last century, the application that the natural gas liquefaction flow process of various different types obtains is divided into following three kinds of modes with refrigeration modes: Cascade; The mix refrigerant liquefaction flow path; Liquefaction flow path with decompressor.
Along with developing rapidly of natural gas liquid chemical industry, this has higher requirement to liquefaction Technology of Natural Gas, therefore selects which kind of liquefaction flow path mode, directly has influence on the economy of LNG factory construction and operation thereof.
Factory selects liquefaction flow path to mainly contain following factor: flow scheme design is simple, equipment is few, cost is low; Energy consumption is low, can adapt to the variation of feed gas composition and atmospheric environment; Environmentally friendly; Equipment is chosen easily.Because natural gas is multicomponent mixture, Component comparison is complicated, accomplish the characteristics such as energy consumption is low, environmentally safe, strong adaptability for the liquefaction flow path that makes design, since 20 century 70s, various dissimilar natural gas liquefaction flow process modes have obtained using and improving.
The utility model content:
The purpose of this utility model provides that a kind of energy consumption is low, reliable operation, lithium bromide precooling liquefying plant that environment is safe from harm.
Above-mentioned purpose realizes by following technical scheme:
A kind of lithium bromide precooling liquefying plant, formed by direct combustion type lithium bromide cooling-water machine group, precool heat exchanger device, ice chest and coolant compressor with the lithium bromide absorption agent, described direct combustion type lithium bromide cooling-water machine group connects described precool heat exchanger device, described precool heat exchanger device connects described ice chest, and described ice chest connects described coolant compressor; Described direct combustion type lithium bromide cooling-water machine group one end connects the chilled water water inlet pipe, the described direct combustion type lithium bromide cooling-water machine group other end connects the chilled water outlet pipe, described chilled water outlet pipe connects the water side of described precool heat exchanger device, and described chilled water water inlet pipe connects the water inlet end of described precool heat exchanger device.
Described lithium bromide precooling liquefying plant, the water inlet end of described precool heat exchanger device connects natural gas air inlet pipe and mix refrigerant inlet pipe, the water side connection natural gas of described precool heat exchanger device goes out precool heat exchanger organ pipe road and mix refrigerant goes out precool heat exchanger organ pipe road, described natural gas goes out precool heat exchanger organ pipe road and goes out precool heat exchanger organ pipe road with described mix refrigerant and be connected simultaneously described ice chest, described ice chest goes out the homonymy connection mix refrigerant cooling box pipeline that precool heat exchanger organ pipe road is connected with described natural gas, described mix refrigerant cooling box pipeline connects described coolant compressor, described ice chest opposite side connects the natural gas outlet pipe, and the described mix refrigerant inlet pipe other end connects described coolant compressor.
Beneficial effect:
1. the direct combustion type lithium bromide cooling-water machine group with the lithium bromide absorption agent that adopts of the utility model, the refrigeration unit take propane or freon as cold-producing medium of commonly using can have been changed into the handpiece Water Chilling Units take lithium bromide as absorbent, so that equipment is reliable and stable, propane or freon Precooling unit need use compressor, the motor-driven equipment of lithium bromide refrigerating only has 2 pumps, the reliability of pump is considerably beyond compressor, and reduced manufacturing cost.
Energy consumption of the present utility model and annual operating cost are low.Propane or the utilization of freon Precooling unit be secondary energy sources, and the utilization of lithium bromide cooling-water machine group is primary energy, energy conversion rate is high.
Economic effect of the present utility model is obvious, liquefied natural gas (LNG)-throughput 1kmol/h, raw natural gas pressure 5.4Mpa, 0.55 yuan/kwh of electricity price, 1.38 yuan/cubic metre of gas prices, main heat exchanger integration temperature difference 7k;
With 30 * 10
4
Sm
3
/ dLNG device is example, year operation 8000 hours, and annual operating cost is as follows:
16,008 without the precooling operating cost, 884 yuan/year; Freon precooling operating cost is 15,053,434 yuan/year; The lithium bromide precooling operating cost is 14,796, and 789 yuan/year, economic benefit is fairly obvious.
. without any pollution, the used precooling agent of freon Precooling unit has pollution to atmosphere to the utility model, does not meet environmental protection to environment; And the used cold-producing medium of direct combustion type lithium bromide refrigerator is water, and absorbent is the lithium bromide environmentally safe.
5. indices of the present utility model contrast is the MR compressor shaft power: 6.94kw during without precooling, 5.98 kw during with the freon precooling, 5.98 kw during with lithium bromide precooling.
Precooling power consumption: 0kw during without precooling, 0.6kw during with the freon precooling, 0 kw during with lithium bromide precooling.
Lithium bromide refrigerator natural gas consumption: 0Nm during without precooling
3
0Nm when/h, the precooling of usefulness freon
3
0.1944 Nm when/h, usefulness lithium bromide precooling
3
/ h.
Power consumption: 6.9977kw during without precooling, 6.58kw during with the freon precooling, 5.98kw during with lithium bromide precooling.
Operating cost: during without precooling 3.8487 yuan/hour, during with the freon precooling 3.619 yuan/hour, during with lithium bromide precooling 3.5573 yuan/hour.
. the utility model is particularly suitable for northern area, and when winter temperature was low, lithium bromide refrigerating water unit can be factory the heat supply of producing and live is provided, and saves plant investment.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.
The specific embodiment:
Embodiment 1:
A kind of lithium bromide precooling liquefying plant, formed by direct combustion type lithium bromide cooling-water machine group 1, precool heat exchanger device 2, ice chest 3 and coolant compressor 4 with the lithium bromide absorption agent, described direct combustion type lithium bromide cooling-water machine group connects described precool heat exchanger device, described precool heat exchanger device connects described ice chest, and described ice chest connects described coolant compressor.
Described direct combustion type lithium bromide cooling-water machine group one end connects chilled water water inlet pipe 5, the described direct combustion type lithium bromide cooling-water machine group other end connects chilled water outlet pipe 6, described chilled water water inlet pipe connects the water inlet end of described precool heat exchanger device, described chilled water outlet pipe connects the water side of described precool heat exchanger device, the water inlet end of described precool heat exchanger device connects natural gas air inlet pipe 7 and mix refrigerant inlet pipe 8, the water side connection natural gas of described precool heat exchanger device goes out precool heat exchanger organ pipe road 9 and mix refrigerant goes out precool heat exchanger organ pipe road 10, described natural gas goes out precool heat exchanger organ pipe road and goes out precool heat exchanger organ pipe road with described mix refrigerant and be connected simultaneously described ice chest, described ice chest goes out the homonymy connection mix refrigerant cooling box pipeline 11 that precool heat exchanger organ pipe road is connected with described natural gas, described mix refrigerant cooling box pipeline connects described coolant compressor, described ice chest opposite side connects natural gas outlet pipe 12, and the described mix refrigerant inlet pipe other end connects described coolant compressor.
The course of work:
As shown in Figure 1, the lithium bromide cooling-water machine group is direct combustion type, is to rely on direct gas-firing heating as thermal source.The lithium bromide cooling-water machine group is take lithium bromide as absorbent, utilize the principle of vapor absorption to make chilled water (5 ~ 7 ℃), enter the precool heat exchanger device by the chilled water water inlet pipe, to reach the mix refrigerant that comes from coolant compressor from the natural gas that preliminary treatment comes is chilled to about 10 ℃ in advance, return the lithium bromide cooling-water machine group after about 5 ℃ of the chilled water temperature rises, circulate next time.Enter the liquefaction ice chest through natural gas and high pressure mixing cold-producing medium after the precooling.Natural gas becomes LNG is drawn by the natural gas outlet pipe, and mix refrigerant enters coolant compressor behind the ice chest rewarming.
Claims (2)
1. lithium bromide precooling liquefying plant, formed by direct combustion type lithium bromide cooling-water machine group, precool heat exchanger device, ice chest and coolant compressor with the lithium bromide absorption agent, it is characterized in that: described direct combustion type lithium bromide cooling-water machine group connects described precool heat exchanger device, described precool heat exchanger device connects described ice chest, and described ice chest connects described coolant compressor; Described direct combustion type lithium bromide cooling-water machine group one end connects the chilled water water inlet pipe, the described direct combustion type lithium bromide cooling-water machine group other end connects the chilled water outlet pipe, described chilled water outlet pipe connects the water side of described precool heat exchanger device, and described chilled water water inlet pipe connects the water inlet end of described precool heat exchanger device.
2. lithium bromide precooling liquefying plant according to claim 1, it is characterized in that: the water inlet end of described precool heat exchanger device connects natural gas air inlet pipe and mix refrigerant inlet pipe, the water side connection natural gas of described precool heat exchanger device goes out precool heat exchanger organ pipe road and mix refrigerant goes out precool heat exchanger organ pipe road, described natural gas goes out precool heat exchanger organ pipe road and goes out precool heat exchanger organ pipe road with described mix refrigerant and be connected simultaneously described ice chest, described ice chest goes out the homonymy connection mix refrigerant cooling box pipeline that precool heat exchanger organ pipe road is connected with described natural gas, described mix refrigerant cooling box pipeline connects described coolant compressor, described ice chest opposite side connects the natural gas outlet pipe, and the described mix refrigerant inlet pipe other end connects described coolant compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220384606 CN202692601U (en) | 2012-08-05 | 2012-08-05 | Lithium bromide pre-cooling liquefaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220384606 CN202692601U (en) | 2012-08-05 | 2012-08-05 | Lithium bromide pre-cooling liquefaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202692601U true CN202692601U (en) | 2013-01-23 |
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ID=47548209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220384606 Expired - Lifetime CN202692601U (en) | 2012-08-05 | 2012-08-05 | Lithium bromide pre-cooling liquefaction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202692601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11624555B2 (en) | 2017-11-27 | 2023-04-11 | Air Products And Chemicals, Inc. | Method and system for cooling a hydrocarbon stream |
-
2012
- 2012-08-05 CN CN 201220384606 patent/CN202692601U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11624555B2 (en) | 2017-11-27 | 2023-04-11 | Air Products And Chemicals, Inc. | Method and system for cooling a hydrocarbon stream |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 112300, Kaiyuan Tieling Kaiyuan Economic Development Zone, Liaoning Province, North First Street, a Patentee after: LIAONING CIMC HASHENLENG GAS LIQUEFACTION EQUIPMENT Co.,Ltd. Address before: Wanggang village Nangang District 150040 Heilongjiang satellite city of Harbin Province Patentee before: HARBIN CRYOGENIC GAS LIQUEFACTION PLANT CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
|
| CX01 | Expiry of patent term |