CN212107868U - Cold and hot energy comprehensive utilization system of LNG receiving station - Google Patents
Cold and hot energy comprehensive utilization system of LNG receiving station Download PDFInfo
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- CN212107868U CN212107868U CN202020183409.2U CN202020183409U CN212107868U CN 212107868 U CN212107868 U CN 212107868U CN 202020183409 U CN202020183409 U CN 202020183409U CN 212107868 U CN212107868 U CN 212107868U
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Abstract
The utility model relates to a cold and hot energy comprehensive utilization system technical field, and disclose LNG receiving station cold and hot energy comprehensive utilization system, including LNG storage system, suitable outside heat source, cold energy air separation system, internal-combustion engine generating set, natural gas boiler, hot water system, defogging system, empty warm formula vaporizer (including gasification section and heating segment), water bath formula vaporizer/reheater and high-pressure natural gas outer transport pipe way, this LNG receiving station cold and hot energy comprehensive utilization system, come out through empty warm vaporizer, empty warm vaporizer divide into two sections, gasification section and heating segment, when the weather condition is good (the temperature is high) directly with empty warm vaporizer can, when the weather condition is not good (the temperature is low), again the reheater heating. The reheater uses hot water system heat supply, if the natural gas volume of gasification needs to increase, partly realize with the air temperature vaporizer, another can be realized through water bath formula vaporizer or reheater, satisfies the peak period demand of using gas.
Description
Technical Field
The utility model relates to a cold and hot energy comprehensive utilization system technical field specifically is LNG receiving station cold and hot energy comprehensive utilization system.
Background
Liquefied Natural Gas (LNG), the main component of which is methane, is known as the cleanest fossil energy on earth. The liquefied natural gas is colorless, tasteless, nontoxic and noncorrosive, the volume of the liquefied natural gas is about 1/625 of the volume of the same amount of gaseous natural gas, and the mass of the liquefied natural gas is only about 45 percent of the same volume of water.
The manufacturing process comprises purifying natural gas produced in a gas field, liquefying at a series of ultralow temperatures, and transporting by a liquefied natural gas carrier. After the liquefied natural gas is combusted, the pollution to the air is very small, and the heat emitted by the liquefied natural gas is large, so the liquefied natural gas is a cleaner energy source.
The existing liquefied natural gas gasification system needs to consume more energy, cannot fully utilize the cold and heat energy contained in the system, and cannot effectively save energy.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a cold and hot energy comprehensive utilization system of LNG receiving station.
(II) technical scheme
The utility model provides a following technical scheme: the LNG receiving station cold and hot energy comprehensive utilization system comprises an LNG storage system, a suitable external heat source, a cold energy air separation system, an internal combustion engine generator set, a natural gas hot water boiler, a hot water system, a demisting system, an air-temperature type gasifier (comprising a gasification section and a heating section), a water bath type gasifier/reheater and a high-pressure natural gas external transmission pipeline, wherein the LNG is in a natural gas storage state, and the output end of the LNG storage system is respectively connected with the input end of the cold energy air separation system, the input end of the gasification section of the air-temperature type gasifier and the input end of the water bath type gasifier through pipelines; the natural gas normal-temperature output end of the cold energy air separation system is connected with the input end of a high-pressure natural gas external transmission pipeline, and the natural gas low-temperature output end of the cold energy air separation system is connected with the input end of the heating section of the air-temperature gasifier; the air-temperature gasifier comprises a gasification section and a heating section, wherein the gasification section is also provided with a demisting system, the output end of the gasification section of the air-temperature gasifier is connected with the input end of the air-temperature gasification heating section and the input end of the water bath gasifier/reheater, the output end of the air-temperature heating section is connected with the input end of the high-pressure natural gas external transmission pipeline, and the output end of the water bath gasifier/reheater is connected with the input end of the high-pressure natural gas external transmission pipeline. The heat input end of the hot water system is connected with the waste heat utilization system of the cold energy air separation system, the waste heat utilization system of the internal combustion engine generator set and the natural gas hot water boiler, the waste heat generated by the air compressor and the air compressor of the cold energy air separation system is utilized to heat the low-temperature return water of the hot water circulation system, the waste heat utilization of the system is realized, the flue gas of the internal combustion engine and the waste heat of the high-temperature cylinder sleeve water are utilized to heat the low-temperature return water, therefore, the hot water generated by the waste heat of the cold energy air separation system, the hot water generated by the smoke of the natural gas internal combustion engine and the waste heat of the cylinder sleeve water and the hot water supplied by the boiler are concentrated into the hot water system for comprehensive utilization, meanwhile, the air compressor and the air compressor of the cold energy air separation system and the high-temperature cylinder sleeve water of the natural gas internal combustion engine are cooled by using low-temperature return water in the hot water system, and when the hot water generated by waste heat utilization is insufficient, the hot water system is supplemented by using hot water generated by a boiler; when other external heat sources are suitable, the output end of the external heat source is also connected to the heat input end of the hot water system; and the heat output end of the hot water system is connected with the water circulation systems of the water bath type gasifier/reheater and the demisting system. When the gasification section of the sectional air-temperature type gasifier does not work, the hot water circulating system continues to operate, and heat is dissipated through air, so that the effect of cooling the cold energy air separation system and the internal combustion engine is achieved.
Preferably, the LNG enters a cold energy air separation system, the low-temperature gaseous natural gas after cold energy utilization is heated by a heating section of an air-temperature gasifier, and is supplemented with heat by a reheater if necessary, and the LNG directly enters a high-pressure external transmission pipeline after reaching a specified temperature.
Preferably, the LNG enters a gasification section of the air-temperature gasifier, absorbs heat of air, undergoes phase change, and is changed into low-temperature gaseous natural gas from the LNG, the low-temperature gaseous natural gas enters the high-pressure external transmission pipeline after being heated by a heating section of the air-temperature gasifier, when the ambient temperature is low, the temperature of the heated natural gas is still low, the heated natural gas is reheated by a reheater (actually equivalent to a water-bath gasifier), and enters the high-pressure external transmission pipeline after reaching a specified temperature, when the heating section of the air-temperature gasifier is abnormal or the peak regulation in a short time needs to increase the gas supply amount, all or part of the low-temperature gaseous natural gas after the gasification section of the air-temperature gasifier can be conveyed to the water-bath gasifier/reheater for heating, and then enters the high-pressure external transmission pipeline after reaching the specified temperature.
Preferably, hot water in the hot water system is circularly fed into the demisting device to demist the gasification section of the segmented air-temperature gasifier, and meanwhile, the ambient temperature around the gasification section can be improved, and the gasification capacity is improved.
(III) advantageous effects
Compared with the prior art, the utility model provides a cold and hot energy comprehensive utilization system of LNG receiving station possesses following beneficial effect:
1. this LNG receiving station cold and hot energy comprehensive utilization system, this system utilizes the waste heat that cold energy air separation system's air compressor machine and compressor produced to heat hot water circulating system's low temperature return water, realize system waste heat utilization, utilize the waste heat of the flue gas of internal-combustion engine and high temperature cylinder liner water to heat hot water circulating system's low temperature return water, realize system waste heat utilization, utilize hot water circulating system's low temperature return water to give cold energy air separation system's air compressor machine and compressor, the high temperature cylinder liner water cooling of internal-combustion engine, when the gasification section of segmentation air-temperature formula vaporizer is out of work, this hot water circulating system continues the operation, dispel the heat through the air, thereby reach and give cold energy air-separation system and internal-combustion engine refrigerated effect.
2. This LNG receiving station cold and hot energy comprehensive utilization system comes out through empty temperature vaporizer, and empty temperature vaporizer divide into two sections, gasification section and heating section, when the weather condition is good (the temperature is high) directly with empty temperature vaporizer can, when the weather condition is not good (the temperature is low), again through the reheater heating. The reheater uses hot water system heat supply, if the natural gas volume of gasification needs to increase, partly realize with the air temperature vaporizer, another can be through water bath formula vaporizer or reheater, satisfies the peak period demand of using gas.
Drawings
Fig. 1 is a system diagram of the present invention.
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 system for comprehensively utilizing cold and heat energy of an LNG receiving station includes an LNG storage system, a suitable external heat source, a cold and air separation system, an internal combustion engine generator set, a Natural Gas hot water boiler, a hot water system, a defogging system, an air-heated vaporizer (including a vaporizing section and a heating section), a water bath vaporizer/reheater, and a high-pressure Natural Gas external transmission pipeline, where the LNG is in a storage state of Natural Gas, Liquefied Natural Gas (LNG) is a main component of methane, which is generally recognized as the cleanest fossil energy on earth, an output end of the LNG storage system is connected with an input end of the cold and air separation system through a pipeline, a normal-temperature Natural Gas output end of the cold and air separation system is connected with an input end of the high-pressure Natural Gas external transmission pipeline, the LNG enters the cold and air separation system, and low-temperature gaseous Natural Gas after cold energy utilization is heated by waste heat of the, the low-temperature natural gas output end of the cold energy air separation system is connected with the input end of the heating section of the air-temperature type gasifier and then enters the high-pressure external conveying pipeline after being heated to normal temperature, when the environmental temperature is low and can not meet the temperature requirement of the external conveying pipeline, the low-temperature natural gas enters the external conveying pipeline after being reheated by a water bath type gasification/reheater, the output end of the LNG storage system is also connected with the input end of the gasification section of the air-temperature type gasifier, hot water in a hot water system is circularly sent to a demisting device to demist the gasification section of the segmented air-temperature type gasifier, meanwhile, the environmental temperature around the gasification section can be improved, the gasification capacity is increased, the output end of the gasification section of the air-temperature type gasifier is connected with the input end of the heating section of the air-temperature type gasifier, and the gasification section of the air-temperature type gasifier can also be connected with the input end of the water bath type, the output end of the heating section of the air-temperature type gasifier is connected with the input end of a high-pressure natural gas external transmission pipeline, the output end of the water bath type gasifier/reheater is connected with the input end of the high-pressure natural gas external transmission pipeline, Liquefied Natural Gas (LNG) enters the gasification section of the air-temperature type gasifier, phase change occurs after absorbing air heat, the LNG is changed into low-temperature gaseous natural gas, the low-temperature gaseous natural gas enters the high-pressure external transmission pipeline after being heated by the heating section of the air-temperature type gasifier, when the environmental temperature is lower, the temperature of the heated natural gas is still lower, the natural gas is reheated by the reheater (actually equivalent to a water bath type gasifier), the low-temperature gaseous natural gas enters the high-pressure external transmission pipeline after reaching the specified temperature, when the heating section of the air-temperature type gasifier is abnormal, or the peak regulation in a short time needs to increase the gas supply amount, all or part of the low-temperature gaseous natural gas after the gasification section, the high-temperature water-cooled air separation system enters a high-pressure external transmission pipeline after reaching a specified temperature, when a proper external heat source is available, the output end of the external heat source is connected with the input end of a hot water system, the waste heat output end of the internal combustion engine generator set is connected with the input end of the hot water system, the output end of the natural gas hot water boiler is connected with the input end of the hot water system, hot water generated by waste heat of the cold energy air separation system, flue gas of a natural gas internal combustion engine and waste heat of high-temperature cylinder sleeve water, and hot water supplied by a boiler are concentrated into the hot water system for comprehensive utilization, meanwhile, low-temperature return water in the hot water system is used for cooling an air compressor and an air compressor of the cold energy air separation system and high-temperature cylinder sleeve water of the natural gas internal combustion engine, when the hot water generated by, the output end of the water bath type gasifier/reheater is connected with the input end of the hot water system, the waste heat generated by the air compressor and the air compressor of the cold energy air separation system is utilized to heat the low-temperature return water of the hot water circulation system, the utilization of the system waste heat is realized, the waste heat of the air compressor and the air compressor of the cold energy air separation system and the waste heat of the high-temperature cylinder sleeve water of the internal combustion engine are heated, the utilization of the system waste heat is realized, the low-temperature return water of the hot water circulation system is utilized to cool the air compressor and the air compressor of the cold energy air separation system and the high-temperature cylinder sleeve water of the internal combustion engine, and when the gasification section of the segmented air-temperature type.
When the air-temperature gasifier is used, the air-temperature gasifier is divided into two sections, namely a gasification section and a heating section, and the air-temperature gasifier is directly used when the weather condition is good (the temperature is high), and the air-temperature gasifier is used for heating when the weather condition is not good (the temperature is low). The reheater uses hot water system heat supply, if the natural gas volume of gasification needs to increase, partly realize with the air temperature vaporizer, another can be through water bath formula vaporizer or reheater, satisfies the peak period demand of using gas.
The low-temperature natural gas that utilizes liquefied natural gas's low temperature cold energy air separation system to use, the low-temperature natural gas that comes out from cold energy air separation system can partly heat up to the temperature requirement that satisfies the defeated outward according to the empty mode of dividing of conventional cold energy, directly flows to high-pressure natural gas outward transmission pipeline, and another part flows to high-pressure natural gas outward transmission pipeline after passing through the heating of air temperature vaporizer heating section again.
A hot water system: the method is characterized by comprising three parts, wherein one part is waste heat of a cold energy air separation system, the other part is waste heat of an internal combustion engine generator set, and the other part is boiler hot water.
The hot water system can be supplied to a reheater, a water bath type gasifier and an air temperature type gasifier for demisting. The low-temperature return water of the hot water system can be supplied to a cold energy air separation system for use, an air compressor and an air compressor of the cold energy air separation system need to be cooled by the low-temperature return water, and can also be supplied to an internal combustion engine generator set for use, and the high-temperature cylinder sleeve water of the internal combustion engine generator set needs to be cooled.
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 (6)
- The LNG receiving station cold and hot energy comprehensive utilization system comprises an LNG storage system, an external heat source, a cold energy air separation system, an internal combustion engine generator set, a natural gas hot water boiler, a hot water system, a demisting system, an air-temperature type gasifier, a water bath type gasifier/reheater and a high-pressure natural gas external transmission pipeline, and is characterized in that: the output end of the LNG storage system is respectively connected with the input end of the cold energy air separation system, the input end of the air temperature type gasifier gasification section and the input end of the water bath type gasifier through pipelines; the natural gas normal-temperature output end of the cold energy air separation system is connected with the input end of a high-pressure natural gas external transmission pipeline, and the natural gas low-temperature output end of the cold energy air separation system is connected with the input end of the heating section of the air-temperature gasifier;the air-temperature type gasifier comprises a gasification section and a heating section, wherein the gasification section is also provided with a demisting system, the output end of the gasification section of the air-temperature type gasifier is connected with the input end of the air-temperature type gasification heating section and the input end of a water bath type gasifier/reheater, the output end of the heating section of the air-temperature type gasifier is connected with the input end of a high-pressure natural gas external transmission pipeline, the output end of the water bath type gasifier/reheater is connected with the input end of the high-pressure natural gas external transmission pipeline, the heat input end of the hot water system is connected with a waste heat utilization system of a cold energy air separation system, a waste heat utilization system of an internal combustion engine generator set and a natural gas hot water boiler, and when other external heat sources exist, the output end of the external heat; and the heat output end of the hot water system is connected with the water circulation systems of the water bath type gasifier/reheater and the demisting system.
- 2. The cold and hot energy comprehensive utilization system of the LNG receiving station as claimed in claim 1, wherein: the LNG is a storage state of natural gas.
- 3. The cold and hot energy comprehensive utilization system of the LNG receiving station as claimed in claim 1, wherein: and the waste heat output end of the cold energy air separation system is connected with the input end of the hot water system.
- 4. The cold and hot energy comprehensive utilization system of the LNG receiving station as claimed in claim 1, wherein: and the low-temperature natural gas output end of the cold energy air separation system is connected with the input end of the heating section of the air-temperature gasifier.
- 5. The cold and hot energy comprehensive utilization system of the LNG receiving station as claimed in claim 1, wherein: and the waste heat output end of the internal combustion engine generator set is connected with the input end of the hot water system.
- 6. The cold and hot energy comprehensive utilization system of the LNG receiving station as claimed in claim 1, wherein: and the output end of the natural gas hot water boiler is connected with the input end of the hot water system.
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| CN202020183409.2U CN212107868U (en) | 2020-02-19 | 2020-02-19 | Cold and hot energy comprehensive utilization system of LNG receiving station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217812A (en) * | 2021-06-24 | 2021-08-06 | 港华投资有限公司 | Technology and system for restraining cold fog and saving energy for LNG (liquefied Natural gas) gasification station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217812A (en) * | 2021-06-24 | 2021-08-06 | 港华投资有限公司 | Technology and system for restraining cold fog and saving energy for LNG (liquefied Natural gas) gasification station |
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