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CN-122015420-A - Cold energy utilization device

CN122015420ACN 122015420 ACN122015420 ACN 122015420ACN-122015420-A

Abstract

The invention relates to the technical field of energy utilization and discloses a cold energy utilization device. The device comprises an intermediate medium circulation system, an intermediate heat exchanger and a terminal medium circulation system. The intermediate medium circulation system comprises a first storage tank for storing an intermediate medium, and a first inlet of the first storage tank is used for being connected with a hot side outlet of the cold taking heat exchanger. The intermediate heat exchanger is provided with a first runner and a second runner, a first outlet of the first storage tank is connected with an inlet of the first runner, and an outlet of the first runner is used for being connected with a hot side inlet of the cold taking heat exchanger. The terminal medium circulation system comprises a second storage tank and a cold terminal, wherein the second storage tank is used for storing terminal medium, a second inlet of the second storage tank is connected with an outlet of the second flow channel, and a second outlet of the second storage tank is connected with an inlet of the second flow channel through the cold terminal. Solves the problem that the cold energy accompanying the existing liquefied natural gas and liquid hydrogen in the application scene of gas expansion work is not fully utilized in the storage and transportation and use links.

Inventors

  • QIU ZAOYANG
  • GAI XIAOGANG
  • LIN JIANSHENG
  • FAN JIAKUN
  • YANG LIANG
  • LIU ZHIYONG
  • WU CHAOBIN
  • CUI BINRAN
  • XIAO LI
  • LIN SUHUI
  • YANG FAN
  • XU JIAWEI
  • LAI YABIAO
  • LAI YUHUA
  • CHEN JU
  • LIN JIBIAO

Assignees

  • 中海石油气电集团有限责任公司

Dates

Publication Date
20260512
Application Date
20260115

Claims (10)

  1. 1. A cold energy utilization device, comprising: an intermediate medium circulation system (100) comprising a first storage tank (110) for storing an intermediate medium, a first inlet of the first storage tank (110) being adapted to be connected to a hot side outlet of an upstream cold extraction heat exchanger; The intermediate heat exchanger (200) is provided with a first flow channel (210) and a second flow channel (220), wherein a first outlet of the first storage tank (110) is connected with an inlet of the first flow channel (210), and an outlet of the first flow channel (210) is used for being connected with a hot side inlet of the cold taking heat exchanger; The terminal medium circulation system (300) comprises a second storage tank (310) and a cold utilization terminal (320), wherein the second storage tank (310) is used for storing terminal mediums, a second inlet of the second storage tank (310) is connected with an outlet of the second flow channel (220), and a second outlet of the second storage tank (310) is connected with an inlet of the second flow channel (220) through the cold utilization terminal (320).
  2. 2. The cold energy utilization apparatus according to claim 1, wherein the intermediate medium circulation system (100) further comprises: And the inlets of the at least two first circulating pumps (120) are connected with the first outlet of the first storage tank (110), and the outlets of the at least two first circulating pumps (120) are connected with the inlet of the first flow channel (210).
  3. 3. The cold energy utilization apparatus according to claim 2, wherein the intermediate medium circulation system (100) further comprises: And the inlet of the first regulating valve (130) is connected with the outlet of each first circulating pump (120), and the outlet of the first regulating valve (130) is connected with the inlet of the first flow channel (210).
  4. 4. A cold energy utilization device according to claim 3, wherein the intermediate medium circulation system (100) further comprises: A second regulating valve (140) installed between an inlet of the first flow passage (210) and an outlet of the first regulating valve (130); A bypass pipe (160), wherein an inlet of the bypass pipe (160) is connected with an outlet of the first regulating valve (130), an outlet of the bypass pipe (160) is used for being connected with an intermediate medium inlet of a lubricating oil cooling system, and an intermediate medium outlet of the lubricating oil cooling system is used for being connected with a hot side inlet of the cold taking heat exchanger; And a third regulating valve (150) provided in the bypass pipe (160).
  5. 5. The cold energy utilization device according to claim 1, wherein the cold use terminal (320) is connected to a cold water air conditioner.
  6. 6. The cold energy utilization apparatus according to claim 1, wherein the terminal medium circulation system (300) further comprises: And the inlets of the second circulating pumps (330) are connected with the second outlet of the second storage tank (310), and the outlets of the second circulating pumps (330) are connected with the inlet of the cooling terminal (320).
  7. 7. The cold energy utilization device according to claim 1, wherein the temperature of the terminal medium stored in the second tank (310) is 5 ℃ to 7 ℃.
  8. 8. The cold energy utilization device according to claim 1, wherein the temperature of the intermediate medium stored in the first tank (110) is-10 ℃ to-5 ℃.
  9. 9. The cold energy utilization device according to any one of claims 1 to 8, further comprising: The skid base (400), the intermediate medium circulation system (100), the intermediate heat exchanger (200) and the terminal medium circulation system (300) are all installed on the skid base (400).
  10. 10. The cold energy utilization device of claim 9, further comprising: The support assembly (500) comprises a first support (510) and a second support (520), wherein the first storage tank (110) is installed on the skid base (400) through the first support (510), and the second storage tank (310) is installed on the skid base (400) through the second support (520).

Description

Cold energy utilization device Technical Field The invention relates to the technical field of energy utilization, in particular to a cold energy utilization device. Background Liquefied Natural Gas (LNG) is used as a high-quality clean energy source with high heat value and low emission, the industrial scale of the LNG is continuously and rapidly expanded in recent years, and the LNG is widely used in the fields of power generation, industry, urban fuel gas and the like. However, prior to use of LNG terminals, a boosting and gasification process is typically required, which releases a significant amount of high grade cold energy. If the part of cold energy can be effectively recycled, the whole energy utilization efficiency is improved by more than 50%, and the energy-saving and economic benefits are obvious. However, in reality, most of LNG cold energy is still directly discharged or dissipated through air cooling, water cooling and other modes at present, which not only causes serious waste of energy resources, but also increases environmental load. In addition, in land based pipeline systems, natural gas is often depressurized near the customer site to meet supply pressure requirements, which can lead to a dramatic drop in natural gas temperature and even formation of cryogenic media as low as-50 ℃. It is generally required to heat the pipe network by consuming extra electric energy or fuel so as to safely input the pipe network, which further causes secondary energy waste. Meanwhile, the low-temperature medium is easy to cause the problems of ice blockage, material embrittlement and the like of the pipeline valve, and brings obvious hidden trouble to operation safety. Similar situations occur in the field of liquid hydrogen. Although liquid hydrogen is not applied on a large scale at present, the liquid hydrogen is used as an important carrier of future traffic energy and chemical raw materials, and has wide development prospect. In practical use, liquid hydrogen is often gasified into hydrogen gas before being put into use, for example, in natural gas hydrogen-doped power generation, hydrogen fuel cell systems, and the like. The phase change process also releases a large amount of cold energy, and at present, in most occasions, the cold energy is hardly recycled by the system, so that not only is energy loss caused, but also local low-temperature influence on the surrounding environment is possible, and potential ecological and safety risks exist. The cold energy accompanied by the storage, transportation and use links of the liquefied natural gas and the liquid hydrogen is not only an underdeveloped resource, but also an efficiency short plate and potential safety hazard in the current energy system. Therefore, how to efficiently, safely and economically recycle the part of cold energy has become a subject to be overcome in the energy industry. The research and the application of the related cold energy utilization technology are promoted, the comprehensive utilization efficiency of energy sources is improved, the carbon emission is reduced, and important support is provided for the green low-carbon transformation of an energy source system. Disclosure of Invention The invention provides a cold energy utilization device which is used for solving the problems of low energy utilization rate and potential safety hazard caused by insufficient utilization of cold energy accompanied by the storage and transportation and use links of liquefied natural gas and liquid hydrogen and the application scene of gas expansion work in the prior art. The invention provides a cold energy utilization device, comprising: The intermediate medium circulation system comprises a first storage tank for storing an intermediate medium, wherein a first inlet of the first storage tank is used for being connected with a hot side outlet of an upstream refrigeration heat exchanger; the first outlet of the first storage tank is connected with the inlet of the first runner, and the outlet of the first runner is used for being connected with the hot side inlet of the cold taking heat exchanger; the terminal medium circulation system comprises a second storage tank and a cooling terminal, wherein the second storage tank is used for storing terminal mediums, a second inlet of the second storage tank is connected with an outlet of the second flow channel, and a second outlet of the second storage tank is connected with an inlet of the second flow channel through the cooling terminal. According to the cold energy utilization device provided by the invention, the intermediate medium circulation system further comprises: And the inlets of the at least two first circulating pumps are connected with the first outlet of the first storage tank, and the outlets of the at least two first circulating pumps are connected with the inlet of the first runner. According to the cold energy utilization device provided by the invention, the intermediate me