CN1258667C - Vapor recovery device for liquefied natural gas - Google Patents
Vapor recovery device for liquefied natural gas Download PDFInfo
- Publication number
- CN1258667C CN1258667C CN 02157974 CN02157974A CN1258667C CN 1258667 C CN1258667 C CN 1258667C CN 02157974 CN02157974 CN 02157974 CN 02157974 A CN02157974 A CN 02157974A CN 1258667 C CN1258667 C CN 1258667C
- Authority
- CN
- China
- Prior art keywords
- cold storage
- natural gas
- liquefied natural
- nitrogen
- box body
- 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 - Fee Related
Links
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 37
- 238000011084 recovery Methods 0.000 title abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 91
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 238000005192 partition Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 24
- 239000011232 storage material Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 150000002829 nitrogen Chemical class 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000005587 bubbling Effects 0.000 abstract 3
- 238000001816 cooling Methods 0.000 abstract 3
- 238000009413 insulation Methods 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000003345 natural gas Substances 0.000 description 7
- 238000010992 reflux Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a cold storage type liquefied natural gas vapor recovery device. The device comprises a box body formed by sealing a heat insulation top cover and a heat insulation shell, wherein a transverse partition plate sealed with the inner wall of the box body is arranged in the box body; a cooling equipment heat exchanger connected with cooling equipment outside the box body is arranged in the box body filled with cooling storage media below the transverse partition plate, a nitrogen bubbling pipe penetrating through the transverse partition plate is further arranged in the box body, the top of the nitrogen bubbling pipe is provided with a section of porous air inlet pipe, and the lower end of the nitrogen bubbling pipe is provided with a porous section of tube array; the device stores residual cold while recovering the vapor of the liquid natural gas, uses conventional low-temperature containers and other equipment, has small investment, simple structure, convenient operation and high economic benefit, and is suitable for small and medium-scale liquefied natural gas supply stations.
Description
Technical field
The present invention relates to a kind of vapor recovery unit of liquefied natural gas, particularly a kind of cold storage liquefied natural gas (LNG) vapor retracting device.
Background technology
At present, the vapor recovery unit of common liquefied natural gas is with the natural gas vapor condensation with refrigeration machine.Because the condensing temperature of natural gas is below-162 ℃, common refrigeration machine operation temperature area is difficult to reach, and the cost of the equipment of deep refrigerating is very high, efficient is low, does not meet the needs in the liquefied natural gas supply station of middle-size and small-size scale.
Summary of the invention
The objective of the invention is to: the cost of vapor recovery unit that overcomes existing liquefied natural gas is too high, does not meet the needs in the liquefied natural gas supply station of middle-size and small-size scale, thereby a kind of cold storage liquefied natural gas (LNG) vapor retracting device is provided.
The object of the present invention is achieved like this: the cold storage liquefied natural gas (LNG) vapor retracting device of the present invention, as shown in Figure 1, this device is characterised in that, comprise the casing that the sealing of adiabatic top cover and insulated case constitutes, be provided with lateral partitions in it with the cabinet wall sealing, place an import and export Guan Jun on the lateral partitions and stretch out casing natural heat exchanger outward, heat exchange gas device top is provided with a liquid nitrogen spraying pipe that has spout that is connected with casing liquid nitrogen storage tank outward; Lateral partitions below be full of place in the casing of cold storage material a connect box outer with cool equipment use the cool equipment heat exchanger, described cold storage material is that freezing point is sub-zero cold storage material; Also be provided with a nitrogen bubble pipe that penetrates lateral partitions in the casing, this nitrogen bubble pipe top is one section porous air inlet pipe, in the pipeline of porous air inlet pipe below a pressure sensitive switch valve is housed, porous air inlet pipe and pressure sensitive switch valve are positioned at the lateral partitions top, and nitrogen bubble pipe lower end is a porous section tubulation; Opening pressure is that the nitrogen discharge valve of malleation is fixed on the casing of dividing plate below; Reflux valve is fixed on the insulated case of nitrogen discharge valve below, and the cold storage material atmospheric valve is fixed on the bottom of insulated case, and described porous section tubulation is positioned at the reflux valve below.
Described heat exchange gas device is vertical row tubular type heat exchanger, plate type heat exchanger or coil exchanger.The outer surface of described heat exchange gas device is coated with capillary structure, and this capillary structure is the parallel capillary curtain that is made into of stainless steel wire screen cloth, copper porous silk screen or capillary.Contain the solid-liquid phase change ball in the described cold storage material, the freezing point of this solid-liquid phase change ball is higher than the freezing point of cold storage material; Described solid-liquid phase change ball is water polo, salt water polo or freon-11 1 ball.
The invention has the advantages that: liquefied natural gas (LNG) vapor retracting device of the present invention is in the withdrawal liquid natural gas vapor, with surplus cold storage, and, this device uses equipment such as conventional low-temperature (low temperature) vessel, invest little, simple in structure, easy to operate, economic benefit is high, can be widely used in the liquefied natural gas supply station of middle-size and small-size scale.
Description of drawings
Fig. 1 is the schematic diagram of the cold storage liquefied natural gas (LNG) vapor retracting device of the present invention.
The accompanying drawing sign
1, adiabatic top cover 2, insulated case 3, dividing plate
4, the inlet tube 6 of nitrogen discharge valve 5, heat exchange gas device, nitrogen bubble pipe
7, liquid nitrogen spraying pipe 8, heat exchange gas device 9, capillary structure
10, the outlet 11 of heat exchange gas device, usefulness cool equipment heat exchanger 12, cold storage material
13, phase transformation ball 14, cold storage material atmospheric valve 15, overflow valve
16, pressure sensitive switch valve 17, liquid nitrogen control valve 18, liquid nitrogen tank
The specific embodiment
Make a cold storage liquefied natural gas (LNG) vapor retracting device.As shown in Figure 1, this device comprises: adiabatic top cover 1, insulated case 2, dividing plate 3, heat exchange gas device 5, liquid nitrogen spraying pipe 7, nitrogen bubble pipe 6, usefulness cool equipment heat exchanger 11, cold storage material 12, pressure sensitive switch valve 16; Wherein, dividing plate 3 is fixed on the middle part of insulated case 2, the inlet tube 5 of heat exchange gas device is fixed on the adiabatic top cover 1, the outlet 10 of heat exchange gas device is fixed on the insulated case 2 of dividing plate 3 tops, capillary network 9 multilayers are coated on the surface of heat exchange gas device 8, the bottom lowering is on dividing plate 3, liquid nitrogen spraying pipe 7 is fixed on the adiabatic top cover 1, directly over heat exchange gas device 8, it is fixing that nitrogen bubble pipe 6 passes dividing plate 3, nitrogen discharge valve 4 is fixed on the insulated case 2 of dividing plate below, overflow valve 15 is fixed on the insulated case 2 of nitrogen discharge valve 4 belows, and cold storage material atmospheric valve 14 is fixed on the bottom of insulated case 2, and cold storage material 12 is full of the insulated case 2 of dividing plate 3 belows, be fixed on insulated case 2 inside of dividing plate 3 belows with cool equipment heat exchanger 11, it imports and exports pipe and housing fixed connection.
In the present embodiment, dividing plate 3 tops adopt flange to be connected and fixed between adiabatic top cover 1 and insulated case 2 and the dividing plate 3; Heat exchange gas device 8 adopts one group of vertical row tubular type heat exchanger, and the inlet tube 5 of heat exchange gas device 8 is fixed on the adiabatic top cover 1, links to each other with the natural gas basin, and the outlet 10 of heat exchange gas device 8 is welded on the insulated case 2, the output liquefied natural gas; Liquid nitrogen spraying pipe 7 is welded on the adiabatic top cover 1, be positioned at heat exchange gas device 8 directly over 15 centimeters, 4 spouts evenly are housed on the liquid nitrogen spraying pipe 7; Capillary network 9 adopts 80 order stainless steel wire screen cloths, and its multilayer is coated on the surface of heat exchange gas device 8, and the bottom lowering is on dividing plate 3.
Utilize the device of embodiment 1 to reclaim liquefied natural gas, concrete steps are as follows:
(1) natural gas vapor that liquefied natural gas basin evaporation rate is caused is incorporated in the heat exchange gas device 8 by the inlet tube 5 of heat exchange gas device;
(2) liquid nitrogen control valve 17 is opened, liquid nitrogen spraying pipe 7 is sprayed onto liquid nitrogen on the capillary network 9 of heat exchange gas device 8 appearances, and the liquid nitrogen vaporization heat absorption is condensed into liquified natural gas with natural gas, and liquified natural gas is by outlet 10 outputs of heat exchange gas pipe;
(3) when the spray chamber nitrogen pressure surpasses setting value 0.8MPa, pressure sensitive switch valve 16 is opened, nitrogen bubble pipe 6 feeds nitrogen in the cold storage material 12 of bottom, by caloic exchange nitrogen surplus cold passed to cold storage material 12 after, utilize the solid-liquid phase change latent heat of water polo to carry out cold-storage earlier.
When nitrogen gas pressure reaches the opening pressure 0.12MPa of nitrogen discharge valve 4, be discharged in the air by nitrogen discharge valve 4, the discharging of nitrogen can not cause environmental pollution.
When the liquid level of cold storage material 12 reached overflow valve 15, overflow valve 15 was opened, and discharged excess liquid.
(4) with in the cool equipment heat exchanger 11 freon refrigerant being housed, use when cold at needs, cold energy is being exported with the circulation in the cool equipment heat exchanger 11 by freon.
In a word, this device uses equipment such as conventional low-temperature (low temperature) vessel, has not only reclaimed the steam of natural gas, can also be easily with the surplus cold storage of nitrogen; And the initial cost of equipment is little, and operation can change flexibly according to the natural gas supply situation, the economic benefit height; This device technique is simple and clear, sound construction, do not have moving component except that control valve, and is therefore simple to operate.
Claims (5)
1, a kind of cold storage liquefied natural gas (LNG) vapor retracting device, it is characterized in that: this device comprises the casing that adiabatic top cover and insulated case sealing constitute, be provided with lateral partitions in it with the cabinet wall sealing, place an import and export Guan Jun on the lateral partitions and stretch out casing heat exchange gas device outward, heat exchange gas device top is provided with a liquid nitrogen spraying pipe that has spout that is connected with casing liquid nitrogen storage tank outward; Lateral partitions below be full of place in the casing of cold storage material a connect box outer with cool equipment use the cool equipment heat exchanger, described cold storage material is that freezing point is sub-zero cold storage material; Also being provided with nitrogen bubble pipe, this nitrogen bubble pipe top that penetrates lateral partitions in the casing is one section porous air inlet pipe, in the pipeline of porous air inlet pipe below a pressure sensitive switch valve is housed, porous air inlet pipe and pressure sensitive switch valve are positioned at the lateral partitions top, and nitrogen bubble pipe lower end is a porous section tubulation; Opening pressure is that the nitrogen discharge valve of malleation is fixed on the casing of dividing plate below; Overflow valve is fixed on the insulated case of nitrogen discharge valve below, and the cold storage material atmospheric valve is fixed on the bottom of insulated case, and described porous section tubulation is positioned at the overflow valve below.
2, according to the described cold storage liquefied natural gas (LNG) vapor retracting device of claim 1, it is characterized in that: described heat exchange gas device is vertical row tubular type heat exchanger, plate type heat exchanger or coil exchanger.
3, according to the described cold storage liquefied natural gas (LNG) vapor retracting device of claim 1, it is characterized in that: the outer surface of described heat exchange gas device is coated with capillary structure, and described capillary structure is the parallel capillary curtain that is made into of stainless steel wire screen cloth, copper porous silk screen or capillary.
4, according to the described cold storage liquefied natural gas (LNG) vapor retracting device of claim 1, it is characterized in that: contain the solid-liquid phase change ball in the described cold storage material, the freezing point of this solid-liquid phase change ball is higher than the freezing point of cold storage material.
5, according to the described cold storage liquefied natural gas (LNG) vapor retracting device of claim 4, it is characterized in that: described solid-liquid phase change ball is water polo, salt water polo or freon-11 1 ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02157974 CN1258667C (en) | 2002-12-20 | 2002-12-20 | Vapor recovery device for liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02157974 CN1258667C (en) | 2002-12-20 | 2002-12-20 | Vapor recovery device for liquefied natural gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510365A CN1510365A (en) | 2004-07-07 |
| CN1258667C true CN1258667C (en) | 2006-06-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02157974 Expired - Fee Related CN1258667C (en) | 2002-12-20 | 2002-12-20 | Vapor recovery device for liquefied natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1258667C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2746143C1 (en) * | 2020-08-20 | 2021-04-07 | Владимир Александрович Шишков | Gas liquidation system |
| RU2753007C1 (en) * | 2020-09-29 | 2021-08-11 | Владимир Александрович Шишков | Gas liquefaction unit |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2807437A2 (en) * | 2009-09-29 | 2014-12-03 | Koninklijke Philips N.V. | System and method for liquefying a fluid and storing the liquefied fluid |
| CN103759497B (en) * | 2014-01-16 | 2016-01-13 | 上海交通大学 | The mounting structure of small-sized prizing liquefied natural gas boil-off gas recovery device of liquefied again |
| CN106764395B (en) * | 2015-11-19 | 2020-09-01 | 张家港中集圣达因低温装备有限公司 | Liquefied natural gas storage tank |
| CN105387683B (en) * | 2015-12-21 | 2018-03-27 | 唐山市同智科技有限公司 | High-efficiency Gas liquefaction recovery method and device |
| CN106196882B (en) * | 2016-08-29 | 2019-05-14 | 中科赛德（北京）科技有限公司 | A kind of cool-storage type gas liquefaction equipment |
| CN110440525B (en) * | 2019-08-07 | 2021-05-14 | 浙江蓝能燃气设备有限公司 | Natural gas liquefaction device and method |
| CN111023867B (en) * | 2019-12-18 | 2021-05-25 | 西南石油大学 | Low temperature liquid nitrogen heat exchanger with adjustable difference in temperature |
-
2002
- 2002-12-20 CN CN 02157974 patent/CN1258667C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2746143C1 (en) * | 2020-08-20 | 2021-04-07 | Владимир Александрович Шишков | Gas liquidation system |
| RU2753007C1 (en) * | 2020-09-29 | 2021-08-11 | Владимир Александрович Шишков | Gas liquefaction unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1510365A (en) | 2004-07-07 |
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