Natural gas pipe network pressure energy power generation and refrigeration house method and device

Abstract

The invention discloses a natural gas pipe network pressure energy power generation and refrigeration house method and device. The device comprises an expansion power generation system and a coolant refrigeration system, wherein the expansion power generation system and the coolant refrigeration system realize power generation and refrigeration integration; the expansion power generation system is that high-pressure natural gas generates power through an expander, then exchanges heat with a coolant, and enters an urban gas pipe network; after exchanging heat with low temperature natural gas, the coolant in the coolant system passes through a distributor; and one stream is directly supplied to a high temperature refrigeration house, and the other stream is supplied to a low temperature refrigeration house after being throttled, so as to realize refrigeration house freshness retaining at different temperature levels. According to the device disclosed by the invention, the expander, a power generator and a compressor operate continuously, so that pressure energy of the pipe network is recycled for generating power and driving the compressor to rotate, externally required energy during independent use of the compressor is reduced, and cooling of two refrigeration houses at different temperature levels is realized; and the device has extremely high economical and social benefits.

Description

technical field [0001] The invention relates to a natural gas pipeline network pressure energy generation and cold storage method and device, in particular to an integrated device for pipeline network natural gas pressure energy expansion power generation and refrigerant refrigeration. Background technique [0002] Long-distance natural gas pipelines generally use high-pressure transmission. During the transmission process, it needs to be raised to high-pressure transmission through a compressor station, and needs to be depressurized at the user side. Natural gas produces a huge capacity in the process of depressurization, and the effective use of this part of energy has attracted widespread attention. [0003] The recovery of natural gas pressure energy is usually converted into mechanical energy and cold energy through an expander. Mechanical energy is often used for power generation or shaft connection, and cold energy is often used in common cold industries such as ice ...

AI Technical Summary

Problems solved by technology

The pressure energy recycling device and the cold energy recycling device of this process are skid-mounted separately, which has structural advantages such as easy installation, easy disassembly, and easy maintenance, ensuring the stable operation of the original equipment and new devices, but the utilization of cold energy is limited to a temperature

Chinese patent CN205025513U discloses a comprehensive utilization system for natural gas pipeline network pressure energy recovery. This patent realizes natural gas expansion power generation and cold energy recovery. limitation

The above-mentioned processes all describe the pressure energy recovery of natural gas pipeline network for power generation and the recovery of cold energy for ice making, but there is no relevant discussion on the application of refrigeration cold storage, especially multi-temperature cold storage

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