Excess pressure and waste heat utilization equipment based on screw expander and heat storage device

By using the waste pressure and waste heat utilization equipment of the screw expander and heat storage device in the gas turbine pressure regulating station, the problem of irrational utilization of natural gas waste pressure and waste heat is solved, the effective recovery and power generation of waste pressure and waste heat are achieved, and the energy utilization efficiency is improved.

CN223387419UActive Publication Date: 2025-09-26HUAIHE ENERGY GAS POWER GENERATION (WUHU) CO LTD
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Patent Information

Application Number
CN202423015052.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-09-26
Estimated Expiration
2034-12-04

AI Technical Summary

Technical Problem

The utilization of natural gas excess pressure and waste heat in existing gas-steam combined cycle units is unreasonable, resulting in energy waste and not in line with the principle of "pressure matching and cascade utilization".

Method used

The screw expander and heat storage device are used to generate electricity by utilizing the excess pressure and heat of the natural gas differential pressure. Combined with the excess pressure and heat utilization equipment of the screw expander and heat storage device, the excess energy in the natural gas transportation process is recovered and used to supplement the power consumption of the power plant.

Benefits of technology

The effective utilization of natural gas waste pressure and waste heat is achieved, excess energy is recovered, the power consumption of the power plant is supplemented, and energy utilization efficiency is improved.

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Abstract

The utility model relates to the field of differential pressure power generation of a gas turbine pressure regulating station, and discloses excess pressure and waste heat utilization equipment based on a screw expander and a heat storage device, which comprises an upstream main pipe incoming gas, and a switch unit is arranged at the output end of the upstream main pipe incoming gas. One output end of the switch unit is connected with a screw expander through a first connecting assembly, a first heat exchanger is arranged at the output end of the screw expander, and the other output end of the switch unit is connected to one input end of the first heat exchanger through a second connecting assembly. A circulating water system is arranged at the other input end of the first heat exchanger and used for increasing the enthalpy value and the temperature of natural gas, and a second heat exchanger is arranged at one output end of the first heat exchanger. According to the utility model, the power generation system is used for generating power by utilizing the residual pressure and residual heat of the natural gas differential pressure, so that the residual energy in the natural gas conveying process is recovered, and the auxiliary power of a power plant can be supplemented.
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