CN114576552A - Energy storage production equipment and energy storage production method for air separation device - Google Patents
Energy storage production equipment and energy storage production method for air separation device Download PDFInfo
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- CN114576552A CN114576552A CN202210084562.3A CN202210084562A CN114576552A CN 114576552 A CN114576552 A CN 114576552A CN 202210084562 A CN202210084562 A CN 202210084562A CN 114576552 A CN114576552 A CN 114576552A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000004146 energy storage Methods 0.000 title claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 209
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 101
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 79
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000001301 oxygen Substances 0.000 claims abstract description 77
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
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- 239000000047 product Substances 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
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- 229910001882 dioxygen Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims 6
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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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
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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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
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/011—Oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/07—Generating electrical power as side effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses an energy storage production device and an energy storage production method for an air separation device, wherein the energy storage production device for the air separation device is used for storing energy and converting energy of the air separation device mainly producing oxygen products and comprises the air separation device, a phase state conversion device, a liquid oxygen storage tank and a liquid nitrogen storage tank, wherein the air separation device is provided with a main oxygen supply pipeline communicated with a user pipe network and a nitrogen pipeline communicated with the phase state conversion device, the phase state conversion device is provided with a nitrogen discharge pipeline, and the phase state conversion device is respectively communicated with the main oxygen supply pipeline and the liquid oxygen storage tank through an oxygen pipeline and a liquid oxygen pipeline and is communicated with the liquid nitrogen storage tank through a liquid nitrogen pipeline; the phase-state conversion device is used for liquefying the introduced oxygen by taking liquid nitrogen in the liquid nitrogen storage tank as a cold source and conveying the liquefied oxygen to the liquid oxygen storage tank for storage, or gasifying the liquid oxygen in the liquid oxygen storage tank by taking nitrogen produced by the air separation device as a heat absorption source and conveying the gasified liquid oxygen to the main oxygen supply pipeline so as to supply oxygen to a user pipe network.
Description
Technical Field
The invention relates to the technical field of low temperature, in particular to energy storage production equipment and an energy storage production method for an air separation device.
Background
With the development of the power structure of China towards green and low-carbon, the proportion of the installed capacity of non-fossil energy power generation such as wind, photoelectricity and the like is continuously improved. Because the supply of new energy such as wind, photoelectricity and the like is limited by natural conditions, active variable load production cannot be realized, and higher requirements are put forward on the consumption capability of a power grid. In order to reduce power grid fluctuation caused by time-space unevenness of generated energy and power consumption and improve the stability of a power grid, time-of-use electricity price policies are vigorously carried out in various places, and electric power price difference in peak-valley periods is continuously expanded. The air separation device is an energy-consumption intensive production device which mainly consumes electric energy and produces industrial gases such as oxygen, nitrogen and the like on a large scale. The air separation device has certain variable load production capacity, and if the peak-to-peak production can be carried out by utilizing the time-of-use electricity price, the low-load production is carried out when the electricity price is high, and the high-load production is carried out when the electricity price is low, so that the production electricity cost can be greatly reduced. However, the air supply load of the air separation plant is restricted by the production requirements of downstream users, so that the production load of the air separation plant cannot be adjusted at will.
Disclosure of Invention
The invention aims to solve the technical problem of providing an air separation unit energy storage production device and an energy storage production method which utilize time-of-use electricity price to adjust the production load of an air separation unit on the premise of ensuring that the air supply load is not changed.
The invention aims to realize energy storage production equipment of an air separation device, which is used for storing energy and converting energy of the air separation device mainly producing oxygen products and comprises the air separation device, a phase state conversion device, a liquid oxygen storage tank and a liquid nitrogen storage tank, wherein the air separation device is provided with a main oxygen supply pipeline communicated with a user pipe network and a nitrogen pipeline communicated with the phase state conversion device; the phase state conversion device is used for liquefying the introduced oxygen by using liquid nitrogen in the liquid nitrogen storage tank as a cold source and conveying the liquefied oxygen to the liquid oxygen storage tank for storage, or gasifying the liquid oxygen in the liquid oxygen storage tank by using nitrogen produced by the air separation device as a heat absorption source and conveying the gasified liquid oxygen to the main oxygen supply pipeline so as to supply oxygen to a user pipe network.
Further, the phase-state conversion device comprises a plate-fin heat exchanger, a nitrogen compressor, a liquid oxygen pump and a liquid nitrogen pump, wherein the plate-fin heat exchanger is used for completing liquid-state conversion of oxygen and nitrogen, the nitrogen compressor is used for boosting and conveying surplus nitrogen products of the air separation device, and the liquid oxygen pump is used for boosting and conveying liquid oxygen from a liquid oxygen storage tank; the liquid nitrogen pump is used for pressurizing and conveying liquid nitrogen from a liquid nitrogen storage tank.
An energy storage production method using the air separation device energy storage production equipment comprises the following steps:
1) the production load of the air separation device is increased during valley electricity, oxygen produced by the air separation device is sent into a user pipe network through a main oxygen supply pipeline, surplus oxygen enters a phase state conversion device through an oxygen pipeline to exchange heat with liquid nitrogen, the introduced oxygen is liquefied into liquid oxygen, the liquid oxygen is sent into a liquid oxygen storage tank through a liquid oxygen pipeline to be stored, the liquid nitrogen serving as a cold source is from the liquid nitrogen storage tank, the liquid nitrogen enters the phase state conversion device through a liquid nitrogen pipeline to exchange heat with the oxygen to be gasified into nitrogen, and the nitrogen is sent to a water cooling tower of the air separation device through a nitrogen discharge pipeline to recover cold or be directly discharged.
2) The production load of the air separation device is reduced during off-peak electricity, liquid oxygen produced and stored in the liquid oxygen storage tank during off-peak electricity enters the phase state conversion device through the liquid oxygen pipeline to exchange heat with nitrogen gas so as to be gasified into oxygen gas, the oxygen gas is connected into the main oxygen supply pipeline through the oxygen pipeline and is sent into a user pipeline network so as to supplement a gap of air separation oxygen production amount, wherein the nitrogen gas serving as a heat absorption source is produced by the air separation device, enters the phase state conversion device through the nitrogen pipeline to exchange heat with the liquid oxygen so as to be liquefied into liquid nitrogen, and then is sent into the liquid nitrogen storage tank through the liquid nitrogen pipeline to be stored.
The invention has the beneficial technical effects that: the low-price electric energy which is produced by the surplus oxygen during the valley power period is stored in the form of liquid oxygen through the phase state conversion device, and the electric energy stored in the liquid oxygen is released through the phase state conversion device during the off-valley power period, so that the using amount of the high-price electric energy is reduced. The liquid oxygen energy storage and release process is converted by taking nitrogen and liquid nitrogen as media, and a small amount of liquid nitrogen products are lost in the conversion process. The used air separation device can be an external compression flow path or an internal compression flow path, and the flow form and the scale are not limited. The phase state conversion device can also adopt different flow organization forms according to different oxygen and nitrogen product pressures of the air separation device. The method can make full use of the policy of time-of-use electricity price, reduces the operation cost of the air separation device on the premise of not influencing the air separation oxygen supply load, and has remarkable economic benefit.
Drawings
Fig. 1 is a schematic diagram of the overall composition of the energy storage production equipment of the air separation plant.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inside", "outside", "lateral", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the energy storage production equipment for an air separation plant according to the present invention is used for energy storage and energy conversion of an air separation plant 1 mainly producing oxygen products, and comprises an air separation plant 1, a phase state conversion device 2, a liquid oxygen storage tank 3 and a liquid nitrogen storage tank 4, wherein the air separation plant 1 is provided with a main oxygen supply pipeline 10 communicated with a user pipe network and a nitrogen pipeline 11 communicated with the phase state conversion device 2, the phase state conversion device 2 is provided with a nitrogen gas discharge pipeline 13, and the phase state conversion device 2 is respectively communicated with the main oxygen supply pipeline 10 and the liquid oxygen storage tank 3 through an oxygen pipeline 14 and a liquid oxygen pipeline 15 and is communicated with the liquid nitrogen storage tank 4 through a liquid nitrogen pipeline 16; the phase-state conversion device 2 is used for liquefying the introduced oxygen by using liquid nitrogen in the liquid nitrogen storage tank 4 as a cold source and conveying the liquefied oxygen to the liquid oxygen storage tank 3 for storage, or gasifying the liquid oxygen in the liquid oxygen storage tank 3 by using nitrogen produced by the air separation device 1 as a heat absorption source and circularly conveying the gasified liquid oxygen to the main oxygen supply pipeline 10 so as to supply oxygen to a user pipe network. The whole device can make full use of the policy of time-of-use electricity price, reduces the operation cost of the air separation device on the premise of not influencing the air separation oxygen supply load, and has remarkable economic benefit.
The phase state conversion device 2 stores low-price electric energy which is produced by surplus oxygen during the valley electricity period in the form of liquid oxygen by utilizing the variable load capacity of the sub-device, releases the electric energy stored by the liquid oxygen during the off-valley electricity period, and supplements an oxygen supply gap generated by the air separation device due to load reduction, thereby reducing the using amount of high-price electric energy; the liquid oxygen energy storage and release process of the phase state conversion device 2 is converted by taking nitrogen and liquid nitrogen as media. More specifically, the phase-state conversion device 2 comprises a plate-fin heat exchanger, a nitrogen compressor, a liquid oxygen pump and a liquid nitrogen pump, wherein the plate-fin heat exchanger is used for completing the phase-state conversion of oxygen and nitrogen, the nitrogen compressor is used for pressurizing and conveying surplus nitrogen products of an air separation device, and the liquid oxygen pump is used for pressurizing and conveying liquid oxygen from a liquid oxygen storage tank; the liquid nitrogen pump is used for pressurizing and conveying liquid nitrogen from a liquid nitrogen storage tank.
Referring to fig. 1, the oxygen line 14 is divided into two parts, one part is used for delivering the oxygen in the main oxygen supply line to the phase change device, and the other part is used for delivering the oxygen gasified by the phase change device to the main oxygen supply line to supplement the oxygen during off-peak electricity. The number of the liquid oxygen pipelines 15 is also two, one is used for conveying the oxygen liquefied by the phase-state conversion device to the liquid oxygen storage tank 3 for storage, and the other is used for conveying the liquid oxygen in the liquid oxygen storage tank 3 to the phase-state conversion device 2. In addition, the number of the liquid nitrogen pipeline 16 is also two, one is used for conveying the liquefied nitrogen gas to the liquid nitrogen storage tank 4, and the other is used for conveying the liquid nitrogen in the liquid nitrogen storage tank 4 to the phase state conversion device 2 to be used as a cold source.
The energy storage production method is based on a time-of-use electricity price system of an electric power market and the current production situation that the air separation unit supplies air load to maintain stable, aims at balancing the power demand of a power grid, excavating the operation potential of the air separation unit and promoting the function diversification of the air separation unit, and develops a brand new air separation process flow with energy storage and material recovery functions. The method comprises the following steps:
1) the production load of the air separation device 1 is increased during valley electricity, oxygen produced by the air separation device is sent into a user pipe network through a main oxygen supply pipeline 10, surplus oxygen enters a phase state conversion device 2 through an oxygen pipeline 14 to exchange heat with liquid nitrogen, the introduced oxygen is liquefied into liquid oxygen, then the liquid oxygen is sent into a liquid oxygen storage tank 3 through a liquid oxygen pipeline 15 to be stored, the liquid oxygen is used as a medium to store valley electricity electric energy, the liquid nitrogen serving as a cold source is from the liquid nitrogen storage tank 4, the liquid nitrogen enters the phase state conversion device 2 through a liquid nitrogen pipeline 16 to exchange heat with the oxygen to be gasified into nitrogen, and the nitrogen is sent to a water cooling tower of the air separation device through a nitrogen discharge pipeline 13 to recover cold or be directly discharged.
2) The production load of the air separation plant 1 is reduced during off-peak electricity, liquid oxygen produced during off-peak electricity and stored in the liquid oxygen storage tank 3 enters the phase state conversion device 2 through the liquid oxygen pipeline 15 to exchange heat with nitrogen so as to be gasified into oxygen, the oxygen is connected into the main oxygen supply pipeline 10 through the oxygen pipeline 14 and is sent to a user pipe network to supplement the gap of the oxygen production amount of air separation, namely, the electric energy consumption of the air separation plant 1 during off-peak electricity is reduced by releasing off-peak electricity stored in the liquid oxygen. The nitrogen gas as the heat absorption source is produced by the air separation device 1, enters the phase state conversion device 2 through the nitrogen pipeline 11, exchanges heat with liquid oxygen to be liquefied into liquid nitrogen, and then is sent to the liquid nitrogen storage tank 4 through the liquid nitrogen pipeline 16 to be stored.
The low-price electric energy which is produced by the surplus oxygen during the valley power period is stored in the form of liquid oxygen through the phase state conversion device, and the electric energy stored in the liquid oxygen is released through the phase state conversion device during the off-valley power period, so that the using amount of the high-price electric energy is reduced. The liquid oxygen energy storage and release process is converted by taking nitrogen and liquid nitrogen as media, and a small amount of liquid nitrogen products are lost in the conversion process. The used air separation device can be an external compression flow path or an internal compression flow path, and the flow form and the scale are not limited. The phase state conversion device can also adopt different flow organization forms according to different oxygen and nitrogen product pressures of the air separation device. The method can make full use of the policy of time-of-use electricity price, reduces the operation cost of the air separation device on the premise of not influencing the air separation oxygen supply load, and has remarkable economic benefit.
The specific embodiments described herein are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. The utility model provides an air separation plant energy storage production facility for to the air separation plant who gives first place to with production oxygen product carry out energy storage and energy conversion, its characterized in that: the system comprises an air separation device, a phase state conversion device, a liquid oxygen storage tank and a liquid nitrogen storage tank, wherein the air separation device is provided with a main oxygen supply pipeline communicated with a user pipe network and a nitrogen pipeline communicated with the phase state conversion device; the phase state conversion device is used for liquefying the introduced oxygen by using liquid nitrogen in the liquid nitrogen storage tank as a cold source and conveying the liquefied oxygen to the liquid oxygen storage tank for storage, or gasifying the liquid oxygen in the liquid oxygen storage tank by using nitrogen produced by the air separation device as a heat absorption source and conveying the gasified liquid oxygen to the main oxygen supply pipeline so as to supply oxygen to a user pipe network.
2. The air separation plant energy storage production facility of claim 1, characterized by: the phase state conversion device comprises a plate-fin heat exchanger, a nitrogen compressor, a liquid oxygen pump and a liquid nitrogen pump, wherein the plate-fin heat exchanger is used for completing liquid phase state conversion of oxygen and nitrogen, the nitrogen compressor is used for boosting and conveying surplus nitrogen products of the air separation device, and the liquid oxygen pump is used for boosting and conveying liquid oxygen from a liquid oxygen storage tank; the liquid nitrogen pump is used for pressurizing and conveying liquid nitrogen from a liquid nitrogen storage tank.
3. An energy storage production method using the air separation unit energy storage production equipment 1 or 2 is characterized in that: the method comprises the following steps:
1) the method comprises the following steps of increasing the production load of an air separation device during valley electricity, sending oxygen produced by the air separation device into a user pipe network through a main oxygen supply pipeline, enabling surplus oxygen to enter a phase-state conversion device through an oxygen pipeline to exchange heat with liquid nitrogen, enabling the introduced oxygen to be liquefied into liquid oxygen, sending the liquid oxygen into a liquid oxygen storage tank through a liquid oxygen pipeline to be stored, wherein liquid nitrogen serving as a cold source comes from the liquid nitrogen storage tank, enters the phase-state conversion device through a liquid nitrogen pipeline to exchange heat with the oxygen to be gasified into nitrogen, and sending the nitrogen to a water cooling tower of the air separation device through a nitrogen discharge pipeline to recover cold or directly discharge the nitrogen;
2) the production load of the air separation device is reduced during off-peak electricity, liquid oxygen produced and stored in the liquid oxygen storage tank during off-peak electricity enters the phase state conversion device through the liquid oxygen pipeline to exchange heat with nitrogen gas so as to be gasified into oxygen gas, the oxygen gas is connected into the main oxygen supply pipeline through the oxygen pipeline and is sent into a user pipeline network so as to supplement a gap of air separation oxygen production amount, wherein the nitrogen gas serving as a heat absorption source is produced by the air separation device, enters the phase state conversion device through the nitrogen pipeline to exchange heat with the liquid oxygen so as to be liquefied into liquid nitrogen, and then is sent into the liquid nitrogen storage tank through the liquid nitrogen pipeline to be stored.
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| CN202210084562.3A CN114576552A (en) | 2022-01-25 | 2022-01-25 | Energy storage production equipment and energy storage production method for air separation device |
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| CN202210084562.3A CN114576552A (en) | 2022-01-25 | 2022-01-25 | Energy storage production equipment and energy storage production method for air separation device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2849428Y (en) * | 2005-09-09 | 2006-12-20 | 攀枝花新钢钒股份有限公司 | Oxygen storage device capable of real-time controlling oxygen supply quantity |
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