Natural gas pressure regulating station system with fault switching function

Abstract

The invention provides a natural gas pressure regulating station system with a fault switching function. The system comprises an inlet unit, a separation and filtration unit, a pressure regulating unit and a heating unit which are sequentially connected through a pipeline, wherein the pressure regulating unit comprises a pressurizing unit and a pressure regulating unit which are arranged in parallel; the separation and filtration unit comprises a working separation and filtration system and a standby separation and filtration system which are arranged in parallel, and a manual isolation valvefor overhauling, isolating and switching the separation and filtration systems is arranged in the separation and filtration unit; the pressurizing unit comprises a working pressurizing unit system anda standby pressurizing unit system which are arranged in parallel, and a switching valve for switching different pressurizing unit systems is arranged in the pressurizing unit; the pressure regulating unit comprises a working pressure regulating system and a standby pressure regulating system which are arranged in parallel, and a manual isolation valve for switching pressure regulating branches is arranged in the pressure regulating unit; and the heating unit comprises a working heating system and a standby heating system which are arranged in parallel, and a manual switching valve for switching the heating systems is arranged in the heating unit.

Description

technical field [0001] The invention relates to the technical field of gas-steam combined cycle power station design, in particular to a natural gas pressure regulating station system with failover function. Background technique [0002] Natural gas is a flammable gas buried underground. It is colorless and odorless. 85-95% of its main component is methane, which is lighter than air and diffuses rapidly in the air. It is a flammable and explosive gas. During the combustion of natural gas, less pollutants are produced, and there is no waste residue or waste water after combustion. Compared with black energy such as coal, it produces very little nitrogen, carbon monoxide, and respirable suspended particles, and hardly produces sulfur dioxide, and the emission of carbon dioxide is about 40% of that of coal. For gas-steam combined cycle power plants, the natural gas pressure regulating station is one of its core equipment. The conventional natural gas pressure regulating stati...

AI Technical Summary

Problems solved by technology

Between the outlet of the GRMS station and the gas turbine fuel module, there are natural gas pressure regulating stations, gas turbine pre-modules (including flow meters, performance heaters, SSOV valves) and other equipment and connected valves and pipelines. These equipment, valves and pipelines are There is a certain pressure drop. According to the conventional pressure regulating station, the natural gas pressure can only be reduced and stabilized, and cannot be boosted. Obviously, when the inlet pressure of the natural gas pressure regulating station is the lower limit value given by the natural gas company, the gas turbine fuel module inlet The pressure will not meet the requirements of gas turbine suppliers

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