CN2758674Y - Refrigerating device for recovering liquefied natural gas cold energy for cold storage - Google Patents
Refrigerating device for recovering liquefied natural gas cold energy for cold storage Download PDFInfo
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- CN2758674Y CN2758674Y CN 200420114636 CN200420114636U CN2758674Y CN 2758674 Y CN2758674 Y CN 2758674Y CN 200420114636 CN200420114636 CN 200420114636 CN 200420114636 U CN200420114636 U CN 200420114636U CN 2758674 Y CN2758674 Y CN 2758674Y
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Abstract
回收液化天然气冷能用于冷库的制冷装置，属于节能与制冷工程技术领域。该装置包括储罐、液化天然气泵、制冷剂泵、换热器、加热器、蒸发器和风机。液化天然气储罐通过液化天然气泵与换热器的管程进口连接，换热器管程出口经过气体加热器与用户管网相连，换热器的壳程出口通过制冷剂泵与冷库库房内的蒸发器进口连接，蒸发器出口与换热器的壳程进口相连，轴流风机安装在蒸发器旁，在蒸发器与换热器的壳程内，充有R410A制冷剂。本实用新型充分利用液化天然气冷能，极大简化了冷库制冷流程，节约了冷库大量的初投资和运行费用，具有显著的经济效益和社会效益。
The utility model relates to recovering the cold energy of liquefied natural gas and using it in a refrigeration device of a cold storage, belonging to the technical field of energy saving and refrigeration engineering. The unit includes storage tanks, LNG pumps, refrigerant pumps, heat exchangers, heaters, evaporators and fans. The liquefied natural gas storage tank is connected to the tube-side inlet of the heat exchanger through the liquefied natural gas pump, and the tube-side outlet of the heat exchanger is connected to the user pipe network through the gas heater. The inlet of the evaporator is connected, the outlet of the evaporator is connected to the inlet of the shell side of the heat exchanger, and the axial flow fan is installed next to the evaporator, and the shell side of the evaporator and the heat exchanger is filled with R410A refrigerant. The utility model fully utilizes the cold energy of the liquefied natural gas, greatly simplifies the refrigeration process of the cold storage, saves a large amount of initial investment and operating costs of the cold storage, and has remarkable economic and social benefits.
Description
技术领域technical field
本实用新型涉及一种制冷装置，尤其是一种回收液化天然气冷能用于冷库的制冷装置，属于节能与制冷工程技术领域。The utility model relates to a refrigeration device, in particular to a refrigeration device which recovers the cold energy of liquefied natural gas and uses it in a cold storage, and belongs to the technical field of energy saving and refrigeration engineering.
背景技术Background technique
液化天然气是天然气经过脱酸、脱水处理，通过低温工艺冷冻液化而成的-162℃的液体混合物。每生产一吨液化天然气的动力及公用设施耗电量约为850kWh，而在液化天然气接收站，一般又需将液化天然气通过汽化器汽化后使用，汽化时放出很大的热量，其值大约为830kJ/kg。这一部分冷能通常在天然气汽化器中随海水或空气被舍弃了，造成了能源的浪费。通过特定的工艺技术利用液化天然气冷能，可以达到节省能源、提高经济效益的目的。Liquefied natural gas is a -162°C liquid mixture obtained by freezing and liquefying natural gas through deacidification and dehydration. The power and utility power consumption of producing one ton of liquefied natural gas is about 850kWh, and at the receiving station of liquefied natural gas, it is generally necessary to vaporize the liquefied natural gas through a vaporizer before using it, and a large amount of heat is released during vaporization, and its value is about 830kJ /kg. This part of cold energy is usually discarded with seawater or air in the natural gas vaporizer, resulting in a waste of energy. Utilizing the cold energy of liquefied natural gas through a specific process technology can achieve the purpose of saving energy and improving economic benefits.
已有技术中，申请号为00128935.7“液化天然气汽化时冷量的利用方法”的发明专利，采用循环水作为冷媒达到空调降温的目的，但由于水的冰点为0℃，液化天然气与水直接换热时极易造成水分冻结引发流动堵塞，此外大温差换热也会造成很大的不可逆损失；申请号为03114438.1“利用液化天然气冷量的汽车空调器”的发明专利，设计了一个乙二醇溶液做冷媒的冷能回收蓄冷系统，但乙二醇凝固点温度还是较高，仍有冷媒冻结引发流动不畅的危险。In the existing technology, the invention patent with the application number 00128935.7 "Utilization method of cooling capacity during vaporization of liquefied natural gas" uses circulating water as the refrigerant to achieve the purpose of cooling the air conditioner. When it is hot, it is easy to cause water to freeze and cause flow blockage. In addition, large temperature difference heat transfer will also cause large irreversible losses; the invention patent of application number 03114438.1 "Automotive air conditioner using liquefied natural gas cooling capacity" has designed an ethylene glycol The solution is used as the refrigerant for the cold energy recovery and cold storage system, but the freezing point temperature of ethylene glycol is still high, and there is still the risk of refrigerant freezing causing poor flow.
实用新型内容Utility model content
为了克服已有技术的不足和缺陷，本实用新型提供一种回收液化天然气冷能用于冷库的制冷装置，该装置包括储罐、液化天然气泵、制冷剂泵、换热器、加热器、蒸发器和风机。液化天然气储罐通过液化天然气泵与换热器的管程进口连接，换热器管程出口经过气体加热器加热后与用户管网相连；换热器的壳程出口通过制冷剂泵与冷库库房内的蒸发器进口连接，蒸发器出口与换热器的壳程进口相连；轴流风机安装在蒸发器旁；在蒸发器与换热器的壳程内，充有适合超低温冷冻的近共沸混合制冷剂R410A作为循环工质。In order to overcome the deficiencies and defects of the prior art, the utility model provides a refrigeration device for recovering the cold energy of liquefied natural gas for cold storage. The device includes a storage tank, a liquefied natural gas pump, a refrigerant pump, a heat exchanger, a heater, an evaporation and fans. The liquefied natural gas storage tank is connected to the tube-side inlet of the heat exchanger through the liquefied natural gas pump, and the tube-side outlet of the heat exchanger is connected to the user's pipe network after being heated by a gas heater; the shell-side outlet of the heat exchanger is connected to the cold storage warehouse through a refrigerant pump. The inlet of the evaporator is connected, and the outlet of the evaporator is connected with the shell side inlet of the heat exchanger; the axial flow fan is installed next to the evaporator; the shell side of the evaporator and the heat exchanger is filled with a near azeotropic liquid suitable for ultra-low temperature freezing The mixed refrigerant R410A is used as the circulating working medium.
储罐中-162℃的液化天然气通过液化天然气泵输入到换热器，液化天然气在换热器中与来自冷库蒸发器的约-52℃气态近共沸混合制冷剂R410A进行热交换，然后送入加热器加热，恢复到常温后输入用户；吸收液化天然气汽化潜热和部分显热的液态R410A制冷剂进入冷库蒸发器与库房内空气进行热交换；通过制冷剂在换热器和蒸发器之间的循环流动，即可在液化天然气汽化的同时，实现冷库超低温冷冻食品的目的。由于液化天然气基地一般都设在港口附近，一则方便船运，二则通常的汽化都是靠与海水的热交换实现的。而大型的水产冷库基本也设在港口附近，这样方便远洋捕获的鱼类的冷冻加工。回收液化天然气的冷能供给冷库是一种非常好的冷能利用方式。The liquefied natural gas at -162°C in the storage tank is input to the heat exchanger through the liquefied natural gas pump. In the heat exchanger, the liquefied natural gas exchanges heat with the near-azeotropic mixed refrigerant R410A at about Enter the heater to heat, and return to normal temperature and then enter the user; the liquid R410A refrigerant that absorbs the latent heat of vaporization of liquefied natural gas and part of the sensible heat enters the cold storage evaporator to exchange heat with the air in the warehouse; through the refrigerant between the heat exchanger and the evaporator The circulating flow can achieve the purpose of freezing food at ultra-low temperature in the cold storage while the liquefied natural gas is vaporized. Since LNG bases are generally located near ports, one is convenient for shipping, and the other is that the usual vaporization is achieved by heat exchange with seawater. The large-scale aquatic product cold storage is basically located near the port, which is convenient for the freezing and processing of fish caught in the ocean. It is a very good way to utilize cold energy by recovering cold energy from liquefied natural gas and supplying cold storage.
本实用新型制冷装置充分利用了液化天然气冷能，节省了能源、提高了经济效益，而且极大简化了冷库制冷流程，节约了冷库大量的初投资和运行费用。此外，采用R410A作为制冷剂，其传热性能佳；不破坏大气臭氧层，对环境友好，具有显著的经济效益和社会效益。The refrigeration device of the utility model fully utilizes the cold energy of liquefied natural gas, saves energy, improves economic benefits, and greatly simplifies the refrigeration process of the cold storage, saving a large amount of initial investment and operating costs of the cold storage. In addition, the use of R410A as a refrigerant has good heat transfer performance; it does not destroy the ozone layer of the atmosphere, is environmentally friendly, and has significant economic and social benefits.
附图说明Description of drawings
图1为本实用新型制冷装置的结构原理图。Fig. 1 is a structural principle diagram of the refrigeration device of the present invention.
具体实施方式Detailed ways
下面结合附图对本实用新型的具体实施作进一步描述。The specific implementation of the utility model will be further described below in conjunction with the accompanying drawings.
如图1所示，本实用新型制冷装置包括：液化天然气储罐1，液化天然气泵2，换热器3，气体加热器4，制冷剂泵5，蒸发器6，轴流风机7。其中换热器3采用卧式壳管式，蒸发器6采用翅片式。As shown in FIG. 1 , the refrigeration device of the present invention includes: a liquefied natural gas storage tank 1 , a liquefied natural gas pump 2 , a heat exchanger 3 , a gas heater 4 , a refrigerant pump 5 , an evaporator 6 , and an axial flow fan 7 . The heat exchanger 3 adopts a horizontal shell-and-tube type, and the evaporator 6 adopts a finned type.
液化天然气储罐1通过液化天然气泵2与换热器3的管程进口连接，换热器3的管程出口经过气体加热器4与用户管网相连；换热器3的壳程出口通过制冷剂泵5与冷库库房内的蒸发器6进口连接，蒸发器6出口与换热器3的壳程进口相连；轴流风机7安装在蒸发器6旁；在蒸发器6与换热器3的壳程内，充有R410A制冷剂。The liquefied natural gas storage tank 1 is connected to the tube-side inlet of the heat exchanger 3 through the liquefied natural gas pump 2, and the tube-side outlet of the heat exchanger 3 is connected to the user pipe network through the gas heater 4; the shell-side outlet of the heat exchanger 3 is The agent pump 5 is connected to the inlet of the evaporator 6 in the cold storage room, and the outlet of the evaporator 6 is connected to the shell side inlet of the heat exchanger 3; the axial flow fan 7 is installed beside the evaporator 6; The shell side is filled with R410A refrigerant.
液化天然气储罐1中-162℃的液化天然气经液化天然气泵2进入换热器3的管程，与来自库房蒸发器6进入换热器3壳程的R410A制冷剂蒸汽逆流进行热交换，吸收热量后的液化天然气汽化成天然气，经气体加热器4加热恢复到常温后输入用户；同时，放出热量的R410A制冷剂蒸汽冷凝成液态制冷剂，经制冷剂泵5送入库房的蒸发器6内，制冷剂在蒸发器6中蒸发，通过轴流风机7与库房内循环流动的空气进行热交换，吸收库房内空气的热量，使冷库库房的温度降为-45℃左右，达到超低温制冷的目的。The liquefied natural gas at -162°C in the liquefied natural gas storage tank 1 enters the tube side of the heat exchanger 3 through the liquefied natural gas pump 2, and exchanges heat with the R410A refrigerant steam that enters the shell side of the heat exchanger 3 from the evaporator 6 of the storehouse in countercurrent, absorbing The liquefied natural gas after heat is vaporized into natural gas, which is heated by the gas heater 4 and then returned to normal temperature, and then input to the user; at the same time, the R410A refrigerant vapor released by the heat is condensed into liquid refrigerant, which is sent to the evaporator 6 of the warehouse through the refrigerant pump 5 , the refrigerant evaporates in the evaporator 6, exchanges heat with the circulating air in the warehouse through the axial flow fan 7, absorbs the heat of the air in the warehouse, and reduces the temperature of the cold storage warehouse to about -45°C, achieving the purpose of ultra-low temperature refrigeration .
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114636 CN2758674Y (en) | 2004-12-23 | 2004-12-23 | Refrigerating device for recovering liquefied natural gas cold energy for cold storage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114636 CN2758674Y (en) | 2004-12-23 | 2004-12-23 | Refrigerating device for recovering liquefied natural gas cold energy for cold storage |
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| CN2758674Y true CN2758674Y (en) | 2006-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420114636 Expired - Fee Related CN2758674Y (en) | 2004-12-23 | 2004-12-23 | Refrigerating device for recovering liquefied natural gas cold energy for cold storage |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424450C (en) * | 2006-11-21 | 2008-10-08 | 华南理工大学 | Method and device for utilizing liquefied natural gas cooling capacity using refrigerant as medium |
| CN102563777A (en) * | 2010-12-31 | 2012-07-11 | 中国石油天然气集团公司 | System for collecting cold energy of liquefied natural gas in drilling team |
| CN106839486A (en) * | 2017-03-07 | 2017-06-13 | 宁波市弘祥能源有限公司 | LNG cold energy cooling cycle systems |
| CN107345728A (en) * | 2017-06-16 | 2017-11-14 | 上海工程技术大学 | A kind of cold energy of liquefied natural gas peculiar to vessel is used for the System and method for of freezer refrigerating |
| CN110530092A (en) * | 2019-09-12 | 2019-12-03 | 天津商业大学 | Recycle the low-temperature cold store of the free-air refrigeration of cold energy of liquefied natural gas |
| KR20200041030A (en) * | 2018-10-11 | 2020-04-21 | 삼성중공업 주식회사 | Liquefied gas re-gasification system |
| CN116045199A (en) * | 2022-11-22 | 2023-05-02 | 中国天辰工程有限公司 | A new intermediate gasifier for LNG receiving station |
-
2004
- 2004-12-23 CN CN 200420114636 patent/CN2758674Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424450C (en) * | 2006-11-21 | 2008-10-08 | 华南理工大学 | Method and device for utilizing liquefied natural gas cooling capacity using refrigerant as medium |
| CN102563777A (en) * | 2010-12-31 | 2012-07-11 | 中国石油天然气集团公司 | System for collecting cold energy of liquefied natural gas in drilling team |
| CN106839486A (en) * | 2017-03-07 | 2017-06-13 | 宁波市弘祥能源有限公司 | LNG cold energy cooling cycle systems |
| CN107345728A (en) * | 2017-06-16 | 2017-11-14 | 上海工程技术大学 | A kind of cold energy of liquefied natural gas peculiar to vessel is used for the System and method for of freezer refrigerating |
| KR20200041030A (en) * | 2018-10-11 | 2020-04-21 | 삼성중공업 주식회사 | Liquefied gas re-gasification system |
| KR102562144B1 (en) * | 2018-10-11 | 2023-08-02 | 삼성중공업(주) | Liquefied gas re-gasification system |
| CN110530092A (en) * | 2019-09-12 | 2019-12-03 | 天津商业大学 | Recycle the low-temperature cold store of the free-air refrigeration of cold energy of liquefied natural gas |
| CN116045199A (en) * | 2022-11-22 | 2023-05-02 | 中国天辰工程有限公司 | A new intermediate gasifier for LNG receiving station |
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