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The gas turbine fuel gas pressure regulating system is a skid-mounted system that supplies gas to the gas turbine, integrating functions such as filtration, heating, pressure regulation, metering, venting, vent discharge, leak alarm, and automatic switching into one.
The fuel gas pressure regulating system for gas turbines generally consists of several subsystems, including the filtration and heating system, metering system, pressure regulating system, venting system, and gas leak alarm system. The metering system is equipped with a flow computer, which calculates the standard condition gas flow through temperature and pressure compensation. The pressure regulating system has the configuration characteristics of a 'pressure control system' and uses the setup of 'safety emergency shut-off valve, monitoring regulator, and operating regulator.' The venting system is generally designed for centralized venting. The gas leak alarm system can be interlocked with the main valve and venting system. In the event of a leak hazard on site, the station control system will command the main valve to close and open the venting system for emergency venting.
This system has high requirements for pressure regulating valves. It requires rapid opening and closing, fast response, and high pressure regulation accuracy. It should also have a large flow capacity. Among pressure regulating valves with these characteristics, axial flow pressure regulating valves are more commonly used. Features include continuous and stable air supply, a wide range of gas pressure adjustment, high explosion-proof requirements, and good safety performance.
◆Optimized design scheme, uses axial flow pressure regulating valve, featuring stable pressure at high flow, excellent shut-off performance, and low noise.
◆ The pressure regulation accuracy can reach up to AC1, with a wide adjustment range;
◆The system safety shutdown responds quickly and has low pressure loss;
◆The system can also be configured with functions such as remote shutdown, pressure regulating valves and valve position remote transmission, controller electric heater, flow and pressure limiting, and remote control.