Natural gas pressure regulating station and method for supplying gas to supercritical circulating fluidized bed boiler

Abstract

The invention relates to a natural gas pressure regulating station and method for supplying gas to a supercritical circulating fluidized bed boiler, and belongs to the technical field of natural gas application. The natural gas pressure regulating station comprises an inlet main pipe, a filtering and metering unit, a pressure regulating unit, a diffusing unit, an odorizing unit, an outlet main pipe and a sewage discharge pool; the inlet main pipe is connected with the filtering and metering unit; the filtering and metering unit is connected with the pressure regulating unit and the sewage discharge pool; the pressure regulating unit is connected with the outlet main pipe; the inlet main pipe, the filtering and metering unit, the pressure regulating unit and the outlet main pipe are all connected with the diffusing unit; and the odorizing unit is connected with the outlet main pipe. The natural gas pressure regulating station provided by the invention is qualified in test operation, smoothly passes the test of the whole set of starting test operation of the unit and loads at all stages, and is stable and reliable in operation, accurate and stable in pressure regulation of the pressure regulating unit, stable in gas filtration of the filtering and metering unit, small in inlet and outlet pressure difference value and normal in pollution discharge.

Description

technical field [0001] The invention relates to a natural gas pressure regulating station and method for gas supply to supercritical circulating fluidized bed boilers, belonging to the technical field of natural gas applications. Background technique [0002] Circulating fluidized bed (CFB) is internationally recognized as one of the clean coal technologies with the best commercialization. Its fuel is widely used. It can not only burn various conventional coals, but also low-quality coal such as petroleum coke and coal gangue. fuel. Supercritical circulating fluidized bed boiler (CSCFB) combines the advantages of circulating fluidized bed combustion technology and supercritical parameter steam cycle. It is a new generation of circulating fluidized bed combustion technology. The initial investment and operation cost of flue gas purification are low. A high-efficiency clean coal technology suitable for mass promotion has developed rapidly at home and abroad. But the CSCFB bo...

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Problems solved by technology

But the CSCFB boilers put into production at home and abroad are only used for power generation and heat supply, and there is no double back pressure pure steam supply unit. Therefore, for the natural gas supply problem of CSCFB double back pressure steam supply unit, there is no relevant technology put into production or implemented at home and abroad.

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