A co-based 2 Refrigerant natural gas pressure energy utilization device
A natural gas and pressure energy technology, which is applied in the field of natural gas pressure energy utilization devices based on CO2 refrigerant, can solve problems such as freezing blockage and limit the application scope of refrigerants, achieve low cost, reduce the risk of freezing blockage and improve heat transfer efficiency. Effect
Active Publication Date: 2019-11-15
SHENZHEN GAS CORP
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Problems solved by technology
Compared with the refrigerants commonly used in natural gas pressure, such as R404A, hydrocarbons, ethanol, etc., CO2 has the characteristics of good environment, low self-cost, good chemical stability, good safety performance, and large heat transfer latent heat. However, CO2 as a refrigerant It also has its own disadvantages. The most important one is that the high temperature of the triple point limits its application as a refrigerant, and it is prone to freeze blockage in low temperature applications.
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[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0034] Such asfigure 1 As shown, a natural gas pressure energy utilization device based on CO2 refrigerant includes a natural gas expansion power generation system, a CO2 refrigerant cycle refrigeration system and an electrical instrument control system.
[0035] The natural gas expansion power generation system includes an expander 5, a heat exchanger 16, and a heater 9 sequentially connected between the high-pressure pipe network and the medium-low pressure pipe network through pipelines, and the output shaft of the expander 5 is sequentially connected to the transmission 4 and One shaft of the biaxial generator 3 , the power output end of th...
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The present invention proposes a CO based 2 Refrigerant natural gas pressure energy utilization devices, including natural gas expansion power generation systems, CO 2 The refrigerant cycle refrigeration system and electrical instrument control system, based on the existing mature natural gas power generation process, realize power balance through the expander-generator-compressor coupling, and choose CO 2 The safe refrigerant is the heat exchange medium of low-temperature natural gas after pressure regulation. According to the needs of the downstream market, a certain amount of cold water is produced as a cold source for cold water air conditioners, as well as for industrial or food ice, dry ice and other processes with different temperature requirements. Provide cold source. The present invention provides a novel process and device for utilization of pressure energy of natural gas pipeline network with good safety performance, intelligence and high efficiency, which further broadens the cold utilization temperature range of pressure energy of natural gas and realizes effective recovery of pressure energy of natural gas pipeline network .
Description
technical field [0001] The invention relates to a production process and device for CO2 refrigerant applied in the field of low temperature, in particular to a CO2 refrigerant-based natural gas pressure energy utilization device. Background technique [0002] At present, there are two main ways to recycle the pressure energy of the natural gas pipeline network at home and abroad: power generation and refrigeration. The pressure energy is used to generate electricity, and the generated electricity can enter the urban power grid, or be used for the power station's own life, production, or distributed. Hydrogen production. Refrigeration methods mainly include cold water air conditioning, air separation, cold storage, rubber crushing, liquefied carbon dioxide and dry ice preparation, etc. [0003] Chinese invention patent application CN201310347177 discloses a small-scale natural gas pipeline network pressure energy generation process and device, and proposes a gas expander, ge...
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IPC IPC(8): F25B9/00F25B41/00F25B49/02F25B41/40
CPCF25B9/008F25B49/02F25B2309/06F25B41/40
Inventor 安成名杜琳琳温永刚游咏陈仲
Owner SHENZHEN GAS CORP