CN212107843U - System for segmented air temperature gasification device promotes empty efficiency of LNG cold energy - Google Patents
System for segmented air temperature gasification device promotes empty efficiency of LNG cold energy Download PDFInfo
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- CN212107843U CN212107843U CN202020182330.8U CN202020182330U CN212107843U CN 212107843 U CN212107843 U CN 212107843U CN 202020182330 U CN202020182330 U CN 202020182330U CN 212107843 U CN212107843 U CN 212107843U
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Abstract
The utility model discloses a system for segmentation air temperature gasification equipment promotes empty efficiency of LNG cold energy, including LNG storage system, segmentation air temperature formula vaporizer, cold energy air separation system and high-pressure natural gas outer transport pipe way, LNG storage system output respectively with segmentation air temperature formula vaporizer gasification section, cold energy air separation system's feed liquor union coupling. The utility model discloses an allow the LNG cold energy to be utilized by air separation system with best effect, the low temperature natural gas can not pass through the waste heat heating of air separation plant self, more pass through entering outer defeated pipeline after electric heater unit reheat, the low temperature natural gas after the cold energy utilizes is imported the heating zone of segmentation air temperature formula vaporizer and is utilized the air and get into outer defeated pipeline after heating, the waste heat of cold energy air separation system self then utilizes in addition, so not only can improve the efficiency of cold energy air separation system, can also practice thrift the energy consumption of cold energy air separation system, resources and cost have been practiced thrift, reach energy-conserving synergistic purpose.
Description
Technical Field
The utility model relates to a LNG cold energy air separation system technical field specifically is the system that segmentation air temperature gasification equipment promoted the empty efficiency of LNG cold energy.
Background
With the increasing tension of the energy supply and demand contradiction in China, the LNG import quantity is increased year by year, and the reasonable utilization of the LNG cold energy is more and more important. Due to the difference between production and use time and space, the LNG cold energy air separation system in the prior art is a closed system, self waste heat cannot be output outwards, external low-cost energy cannot be utilized, and meanwhile, the LNG cold energy cannot be optimally utilized in consideration of the requirement that comprehensive energy is as low as possible. Therefore, in order to solve the above problems, it is necessary to provide a system for improving the air separation efficiency of the LNG cold energy by using a segmented air temperature gasification device.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The not enough to prior art, the utility model provides a segmentation air temperature gasification equipment promotes empty efficiency of dividing of LNG cold energy system possesses advantages such as the empty efficiency of improving the space, energy-conservation and energy comprehensive utilization, has solved inefficiency, can't accomplish the problem of abundant energy-conservation and energy comprehensive utilization.
(II) technical scheme
For the purpose of realizing above-mentioned empty efficiency, energy-conservation and the energy comprehensive utilization of the improvement, the utility model provides a following technical scheme: the system for improving the LNG cold energy air separation efficiency by the segmented air temperature gasification device comprises an LNG storage system, a segmented air temperature type gasifier, a cold energy air separation system and a high-pressure natural gas external transmission pipeline, wherein the output end of the LNG storage system is respectively connected with a liquid inlet pipe of the air temperature type gasifier and a liquid inlet pipe of the cold energy air separation system, the output gas pipes of the air temperature type gasifier and the cold energy air separation system are respectively connected with the high-pressure natural gas external transmission pipeline, the segmented air temperature type gasifier consists of an air temperature type gasifier gasification section and a heating section, the output end of the LNG storage system is connected with the air temperature type gasification device to gasify LNG, the output end of the air temperature type gasifier gasification section is connected with the heating section of the air temperature type gasifier to heat gasified low-temperature natural gas, the output end of the LNG storage system is connected with the liquid inlet pipe of the cold energy air separation system, and a normal-temperature output pipe of the cold energy air separation system, the low-temperature cold energy supplied by the liquefied natural gas is used for the air separation device, the temperature of the natural gas after coming out of the cold energy air separation system is increased to some extent, the requirement of the normal-temperature natural gas is met, and the natural gas is directly conveyed into a high-pressure natural gas external conveying pipeline.
Preferably, a low-temperature natural gas output pipe of the cold energy air separation system is connected with an air inlet pipe of the air-temperature gasifier heating section, secondary heating is carried out through the air-temperature gasifier heating section, and the natural gas is conveyed into a high-pressure natural gas external conveying pipeline after the natural gas meets the requirement of the normal temperature.
Preferably, the low-temperature natural gas output pipe of the cold energy air separation system is connected with a heating system, when the heating capacity of the heating section of the air-temperature type gasifier is insufficient, a part of low-temperature gaseous natural gas is heated by the heating section of the air-temperature type gasifier, and a part of low-temperature gaseous natural gas is heated by the waste heat of the cold energy air separation system.
(III) advantageous effects
Compared with the prior art, the utility model provides a system for segmentation air temperature gasification equipment promotes LNG cold energy air separation system efficiency possesses following beneficial effect:
1. this segmentation air temperature gasification equipment promotes empty efficiency's of LNG cold energy system, allow the LNG cold energy to be utilized by air separation plant with the best effect, and need not consider that cold energy utilizes the energy consumption that back low temperature gaseous state natural gas heated to the normal atmospheric temperature and got into outer defeated pipeline needs, low temperature natural gas does not pass through air separation plant self waste heat heating, more pass through entering outer defeated pipeline after electric heater unit reheat, low temperature natural gas after the cold energy utilization is inputed the heating zone of segmentation air temperature formula vaporizer and is utilized the air energy to get into outer defeated pipeline after heating, cold energy air separation system self waste heat then utilizes in addition, so not only can improve cold energy air separation system's efficiency, can also practice thrift cold energy air separation system's energy consumption, resources and cost have been practiced thrift, reach energy-conserving supplementary potentiation's purpose.
2. This segmentation air temperature gasification equipment promotes empty efficiency's of LNG cold energy system that divides, when empty temperature formula vaporizer heating section heating capacity is not enough, partly low temperature gaseous state natural gas passes through the heating of empty temperature formula vaporizer heating section, and partly low temperature gaseous state natural gas still utilizes cold energy air separation system self's waste heat to satisfy with gas peak period demand, improve the efficiency of work.
Drawings
FIG. 1 is a schematic diagram of a system for improving the air separation efficiency of LNG cold energy by using a segmented air-temperature gasification device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a system for improving the cold energy air separation efficiency of LNG by a segmented air temperature vaporizer, comprising an LNG storage system, a segmented air temperature vaporizer (including a vaporizing section and a heating section), a cold energy air separation system and a high pressure natural gas external pipeline, wherein the output end of the LNG storage system is connected to the air temperature vaporizer and the liquid inlet pipe of the cold energy air separation system, the output gas pipes of the air temperature vaporizer and the cold energy air separation system are connected to the high pressure natural gas external pipeline, the segmented air temperature vaporizer is composed of a vaporizing section and a heating section, the output end of the LNG storage system is connected to the air temperature vaporizer to vaporize LNG, the vaporizing section of the air temperature vaporizer is connected to the heating section of the air temperature vaporizer to heat the vaporized low temperature gaseous natural gas, the natural gas is transported to the high pressure natural gas external pipeline after reaching the normal temperature requirement of the natural gas, the output of LNG storage system is connected with cold energy air separation system's feed liquor union coupling, cold energy air separation system's normal atmospheric temperature natural gas output tube and high-pressure natural gas defeated outward pipeline are connected, the intake-tube connection of low temperature gaseous state natural gas and air temperature formula vaporizer heating section, the low temperature that utilizes liquefied natural gas supplies cold energy air separation system to use, the low temperature natural gas after coming out from cold energy air separation system heats through air temperature formula vaporizer heating section, carry in the high-pressure natural gas defeated outward pipeline after reaching the natural gas normal atmospheric temperature requirement, if air temperature formula vaporizer heating section heating capacity is not enough, partly low temperature gaseous state natural gas heats through air temperature formula vaporizer heating section, partly low temperature gaseous state natural gas still utilizes cold energy air separation system self waste heat to heat, with the demand of satisfying the gas consumption peak period, the efficiency of work is improved.
The working steps are as follows:
the first step is as follows: LNG in the LNG storage system enters a cold energy air separation system, and low-temperature gaseous natural gas after cold energy utilization is output to the input end of the heating section of the segmented air-temperature gasifier.
The second step is that: the low-temperature natural gas from the cold energy air separation system is heated by the heating section of the air-temperature gasifier, and is conveyed into the high-pressure natural gas external conveying pipeline after the natural gas meets the normal temperature requirement.
The third step: if air temperature formula vaporizer heating section heating capacity is not enough, partly low temperature gaseous state natural gas heats through air temperature formula vaporizer heating section, and partly low temperature gaseous state natural gas still utilizes cold energy air separation system self's waste heat to satisfy the demand of using gas peak period, improve the efficiency of work.
The fourth step: the output end of the LNG storage system is connected with the air-temperature type gasification device to gasify LNG, the gasification section of the air-temperature type gasifier is connected with the heating section of the air-temperature type gasifier to heat gasified low-temperature gaseous natural gas, and the gasified low-temperature gaseous natural gas is conveyed into a high-pressure natural gas outward conveying pipeline after reaching the requirement of natural gas normal temperature.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. System of segmentation air temperature gasification equipment promotes empty efficiency of LNG cold energy, including LNG storage system, segmentation air temperature formula vaporizer, cold energy air separation system and high-pressure natural gas defeated pipeline outward, its characterized in that: the output of LNG storage system respectively with empty warm formula vaporizer, cold energy air separation system's feed liquor union coupling, the segmentation empty warm formula vaporizer comprises empty warm formula vaporizer gasification section and empty warm formula vaporizer heating segment, the output of LNG storage system connects empty warm formula vaporizer gasification section input, the input of empty warm formula vaporizer heating segment is connected to the output of empty warm formula vaporizer gasification segment, the output of segmentation empty warm formula vaporizer heating segment is connected to on the high-pressure natural gas outer transport pipe way, the output of LNG storage system and cold energy air separation system's feed liquor union coupling, cold energy air separation system's normal atmospheric temperature natural gas output and high-pressure natural gas outer transport pipe way are connected.
2. The system for improving the air separation efficiency of the cold energy of LNG by the segmented air-temperature gasification device according to claim 1, is characterized in that: and the low-temperature natural gas output end of the cold energy air separation system is connected with the input end of the air temperature type gasifier heating section.
3. The system for improving the air separation efficiency of the cold energy of LNG by the segmented air-temperature gasification device according to claim 1, is characterized in that: and the low-temperature natural gas output end of the cold energy air separation system is connected with a heating system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020182330.8U CN212107843U (en) | 2020-02-19 | 2020-02-19 | System for segmented air temperature gasification device promotes empty efficiency of LNG cold energy |
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| CN202020182330.8U CN212107843U (en) | 2020-02-19 | 2020-02-19 | System for segmented air temperature gasification device promotes empty efficiency of LNG cold energy |
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| CN212107843U true CN212107843U (en) | 2020-12-08 |
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