CN219283780U - Liquefied gas energy optimizing system - Google Patents
Liquefied gas energy optimizing system Download PDFInfo
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- CN219283780U CN219283780U CN202320350573.1U CN202320350573U CN219283780U CN 219283780 U CN219283780 U CN 219283780U CN 202320350573 U CN202320350573 U CN 202320350573U CN 219283780 U CN219283780 U CN 219283780U
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Abstract
The utility model discloses a liquefied gas energy optimization system, which comprises: the device comprises a liquid air storage tank, a liquid nitrogen storage tank, a main heat exchanger, an auxiliary heat exchanger, a compressed air precooler and a liquid nitrogen precooler; the liquid phase outlet of the liquid-air storage tank is connected with the refrigerant inlet of the main heat exchanger, and the heating medium outlet of the main heat exchanger is connected with the refrigerant inlet of the compressed air precooler; the liquid phase outlet of the liquid nitrogen storage tank is connected with the refrigerant inlet of the auxiliary heat exchanger, and the heating medium outlet of the auxiliary heat exchanger is connected with the refrigerant inlet of the liquid nitrogen precooler. The liquid air storage tank and the liquid nitrogen storage tank are used for storing residual liquid, the liquid phase gas is heated and gasified by the main heat exchanger and the auxiliary heat exchanger, cold energy is provided for the compressed air precooler and the liquid nitrogen precooler, meanwhile, the hydraulic turbine unit is driven to perform work, the recovery of the residual liquid is realized, the waste of resources is avoided, the recovered residual liquid is used for performing work and cooling, the whole energy consumption of the air separation system is reduced, and the energy optimization is realized.
Description
Technical Field
The utility model relates to the technical field of space division systems, in particular to a liquefied gas energy optimization system.
Background
The air separation system is a system in which air is used as a raw material, the air is converted into a liquid by using a low temperature, and then inert gases such as oxygen, nitrogen, argon and the like are separated in a distillation process. For temporary storage of intermediate products, a plurality of storage tanks are generally arranged in the whole air separation system to store liquid air, liquid nitrogen and the like for other processes to use or to be directly filled.
However, since the liquid gas exists in the storage tank and gas with saturation pressure is generated, when the liquid gas is pumped by the plunger pump, gas-liquid two phases exist, if the gas is carried in the liquid, the liquid pumping amount of the plunger pump can be directly influenced, and the efficiency of other preparation processes is further influenced. In order to solve the technical problems, a person skilled in the art adopts a mode of discharging part of gas which is coexistent with gas and liquid before the plunger pump, and the problem of resource waste exists although the liquid pumping amount of the plunger pump is improved.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a liquefied gas energy optimization system. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The utility model adopts the following technical scheme:
there is provided a liquefied gas energy optimization system comprising: the device comprises a liquid air storage tank, a liquid nitrogen storage tank, a main heat exchanger, an auxiliary heat exchanger, a compressed air precooler and a liquid nitrogen precooler;
the liquid phase outlet of the liquid-air storage tank is connected with the refrigerant inlet of the main heat exchanger, and the heating medium outlet of the main heat exchanger is connected with the refrigerant inlet of the compressed air precooler;
the liquid phase outlet of the liquid nitrogen storage tank is connected with the refrigerant inlet of the auxiliary heat exchanger, and the heat medium outlet of the auxiliary heat exchanger is connected with the refrigerant inlet of the liquid nitrogen precooler.
Further, a heating medium inlet of the main heat exchanger is connected with a cooling medium outlet of the compressed air precooler; and a heating medium inlet of the auxiliary heat exchanger is connected with a cooling medium outlet of the liquid nitrogen precooler.
Further, the liquefied gas energy optimizing system further comprises: a first stage hydraulic turbine; and a working medium inlet of the first section of hydraulic turbine is connected with a refrigerant outlet of the main heat exchanger.
Further, the liquefied gas energy optimizing system further comprises: a two-stage hydraulic turbine; and a working medium inlet of the two-section hydraulic turbine is connected with a refrigerant outlet of the auxiliary heat exchanger.
Further, the liquefied gas energy optimizing system further comprises: a circulating water delivery line and a precooler disposed on the circulating water delivery line; and circulating water discharged from the water cooling tower is pumped into the precooler through the circulating water conveying pipeline by the first-stage hydraulic turbine and the second-stage hydraulic turbine for cooling and then conveyed into the air cooling tower.
Further, the liquefied gas energy optimizing system further comprises: a first plunger pump; the liquid inlet of the first plunger pump is connected with the liquid phase outlet of the liquid nitrogen storage tank, and the liquid outlet of the first plunger pump is connected with the refrigerant inlet of the auxiliary heat exchanger.
Further, the liquefied gas energy optimizing system further comprises: a second plunger pump; the liquid inlet of the second plunger pump is connected with the liquid nitrogen storage tank, and the liquid inlet of the second plunger pump is connected with the liquid nitrogen storage tank through a pressure release pipeline, and a control valve is arranged on the pressure release pipeline.
The utility model has the beneficial effects that: the liquid air storage tank and the liquid nitrogen storage tank are used for storing residual liquid, the liquid phase gas is heated and gasified by the main heat exchanger and the auxiliary heat exchanger, cold energy is provided for the compressed air precooler and the liquid nitrogen precooler, meanwhile, the hydraulic turbine unit is driven to perform work, the recovery of the residual liquid is realized, the waste of resources is avoided, the recovered residual liquid is used for performing work and cooling, the whole energy consumption of the air separation system is reduced, and the energy optimization is realized.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a liquefied gas energy optimization system of the present utility model.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, in some illustrative embodiments, the present utility model provides a liquefied gas energy optimization system comprising: the liquid air storage tank 1, the liquid nitrogen storage tank 2, the main heat exchanger 3, the auxiliary heat exchanger 4, the compressed air precooler 5, the liquid nitrogen precooler 6, the first-stage hydraulic turbine 7, the second-stage hydraulic turbine 8, the circulating water conveying pipeline 9, the precooler 10, the first plunger pump 11 and the second plunger pump 12.
The gas part of the gas-liquid coexistence is respectively stored by a liquid air storage tank 1 and a liquid nitrogen storage tank 2, wherein the gas-liquid coexistence air is stored in the liquid air storage tank 1, and the gas-liquid coexistence nitrogen is stored in the liquid nitrogen storage tank 2. The liquid inlet of the second plunger pump 12 is connected with the liquid nitrogen storage tank 2 through a pressure release pipeline 13, a control valve 14 is arranged on the pressure release pipeline 13, the pressure release pipeline 12 is used for adjusting the pressure of the storage tank, and when the internal pressure of the liquid nitrogen storage tank 2 is overlarge, the control valve 14 is opened for pressure release, so that safety is ensured. And the second plunger pump 12 can also be used as a pressurizing pump used when filling nitrogen, so that fluid generated by pressure release is directly treated by the second plunger pump 12, no additional equipment is needed, and the cost is reduced.
The liquid inlet of the first plunger pump 11 is connected with the liquid phase outlet of the liquid nitrogen storage tank 2, and the liquid outlet of the first plunger pump 11 is connected with the refrigerant inlet of the auxiliary heat exchanger 4. The heat medium outlet of the auxiliary heat exchanger 4 is connected with the refrigerant inlet of the liquid nitrogen precooler 6, and the heat medium inlet of the auxiliary heat exchanger 4 is connected with the refrigerant outlet of the liquid nitrogen precooler 6. The liquid phase gas in the liquid nitrogen storage tank 2 is pumped into the auxiliary heat exchanger 4 by the first plunger pump 11 to exchange heat with a medium with higher heat from the liquid nitrogen precooler 6, so that the temperature of the heat exchange medium in the liquid nitrogen precooler 6 is reduced, and the liquid nitrogen passing through the liquid nitrogen precooler 6 is cooled.
The liquid phase outlet of the liquid-air storage tank 1 is connected with the refrigerant inlet of the main heat exchanger 3, the heating medium outlet of the main heat exchanger 3 is connected with the refrigerant inlet of the compressed air precooler 5, and the heating medium inlet of the main heat exchanger 3 is connected with the refrigerant outlet of the compressed air precooler 5. The liquid phase gas in the liquid-air storage tank 1 is pumped into the main heat exchanger 3 to exchange heat with a medium with higher heat from the compressed air precooler 5, so that the temperature of the heat exchange medium in the compressed air precooler 5 is reduced, and the compressed air passing through the compressed air precooler 5 is cooled.
The working medium inlet of the first section of hydraulic turbine 7 is connected with the refrigerant outlet of the main heat exchanger 3. The working medium inlet of the two-section hydraulic turbine 8 is connected with the refrigerant outlet of the auxiliary heat exchanger 4. The precooler 10 is provided on a circulating water delivery pipe 9, and the circulating water delivery pipe 9 is used for delivering circulating water in a water cooling tower 15 to an air cooling tower 16. In actual operation, the circulating water discharged from the water cooling tower 15 is pumped into the precooler 10 through the circulating water conveying pipeline 9 by the first-stage hydraulic turbine 7 and the second-stage hydraulic turbine 8 for cooling and then conveyed into the air cooling tower 16.
The residual liquid discharged from the liquid air storage tank 1 is subjected to heat exchange in the main heat exchanger 3 to raise the temperature, the gas subjected to temperature raising and gasification pushes the first-stage hydraulic turbine 7 to rotate, and the residual liquid recovered from the liquid nitrogen storage tank 2 is used for pushing the second-stage hydraulic turbine 8 to rotate during gasification. In the process, the volume of the liquid phase gas is suddenly increased to be changed into the gas phase gas, the liquid-gas ratio is about 1:680, and the pipe diameter of the gas phase pipeline is not increased, so that the pressure is suddenly increased under the condition that the volume is unchanged in the process of changing the liquid phase gas into the gas phase gas, and the high-pressure gas after heat exchange in the main heat exchanger 3 and the auxiliary heat exchanger 4 pushes the main heat exchanger 3 and the auxiliary heat exchanger to rotate when passing through the first-stage hydraulic turbine 7 and the second-stage hydraulic turbine 8, and circulating water in the water cooling tower 15 is pumped into the air cooling tower 16.
The utility model designs the main heat exchanger 3, the auxiliary heat exchanger 4, the first section of the hydraulic turbine 7 and the second section of the hydraulic turbine 8, so that the high-pressure gas for heat exchange and gasification pushes the hydraulic turbine to work, part or all of circulating water of the water cooling tower 15 is conveyed into the air cooling tower 16, and the work of a water pump motor can be reduced or stopped, so that the effect of reducing electric energy is achieved. The utility model realizes liquid transportation between the water cooling tower 15 and the air cooling tower 16 by utilizing the residual liquid gasification process and simultaneously provides cold energy for the compressed air precooler 5 and the liquid nitrogen precooler 6, so the structural design of the utility model can greatly reduce energy consumption, and the process has the advantages of no harmful components and environmental protection.
The gas phase gas discharged from the liquid nitrogen storage tank 2 enters the water cooling tower 15, water washing is carried out in the water cooling tower 15, and the gas phase gas is directly discharged into the atmosphere after the water washing. The gas phase gas discharged from the liquid nitrogen storage tank 2 is washed by the recirculated circulating water, no new equipment is needed to treat residual gas, and the method has the advantages of environmental protection and safety.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (7)
1. A liquefied gas energy optimization system, comprising: the device comprises a liquid air storage tank, a liquid nitrogen storage tank, a main heat exchanger, an auxiliary heat exchanger, a compressed air precooler and a liquid nitrogen precooler;
the liquid phase outlet of the liquid-air storage tank is connected with the refrigerant inlet of the main heat exchanger, and the heating medium outlet of the main heat exchanger is connected with the refrigerant inlet of the compressed air precooler;
the liquid phase outlet of the liquid nitrogen storage tank is connected with the refrigerant inlet of the auxiliary heat exchanger, and the heat medium outlet of the auxiliary heat exchanger is connected with the refrigerant inlet of the liquid nitrogen precooler.
2. The liquefied gas energy optimizing system as recited in claim 1, wherein a heating medium inlet of the main heat exchanger is connected with a cooling medium outlet of the compressed air precooler; and a heating medium inlet of the auxiliary heat exchanger is connected with a cooling medium outlet of the liquid nitrogen precooler.
3. The liquefied gas energy optimization system of claim 2, further comprising: a first stage hydraulic turbine; and a working medium inlet of the first section of hydraulic turbine is connected with a refrigerant outlet of the main heat exchanger.
4. A liquefied gas energy optimization system as claimed in claim 3, further comprising: a two-stage hydraulic turbine; and a working medium inlet of the two-section hydraulic turbine is connected with a refrigerant outlet of the auxiliary heat exchanger.
5. The liquefied gas energy optimization system of claim 4, further comprising: a circulating water delivery line and a precooler disposed on the circulating water delivery line; and circulating water discharged from the water cooling tower is pumped into the precooler through the circulating water conveying pipeline by the first-stage hydraulic turbine and the second-stage hydraulic turbine for cooling and then conveyed into the air cooling tower.
6. The liquefied gas energy optimization system of claim 5, further comprising: a first plunger pump; the liquid inlet of the first plunger pump is connected with the liquid phase outlet of the liquid nitrogen storage tank, and the liquid outlet of the first plunger pump is connected with the refrigerant inlet of the auxiliary heat exchanger.
7. The liquefied gas energy optimization system of claim 6, further comprising: a second plunger pump; the liquid inlet of the second plunger pump is connected with the liquid nitrogen storage tank, and the liquid inlet of the second plunger pump is connected with the liquid nitrogen storage tank through a pressure release pipeline, and a control valve is arranged on the pressure release pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350573.1U CN219283780U (en) | 2023-02-28 | 2023-02-28 | Liquefied gas energy optimizing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350573.1U CN219283780U (en) | 2023-02-28 | 2023-02-28 | Liquefied gas energy optimizing system |
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| Publication Number | Publication Date |
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| CN219283780U true CN219283780U (en) | 2023-06-30 |
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| CN202320350573.1U Active CN219283780U (en) | 2023-02-28 | 2023-02-28 | Liquefied gas energy optimizing system |
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- 2023-02-28 CN CN202320350573.1U patent/CN219283780U/en active Active
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