Waste heat boiler system device with gas turbine shutdown complementary combustion function

Abstract

The invention discloses a waste heat boiler system device with a gas turbine shutdown complementary combustion function, and belongs to the technical field of waste heat boilers. The waste heat boilersystem device is characterized in that a gas turbine is connected with a complementary combustion flue by a gas turbine exhaust flue, a fresh-air inlet air duct is arranged on the gas turbine exhaustflue, a fresh-air regulating valve is arranged on the fresh-air inlet air duct, a flow equalizing device is arranged at an inlet of the complementary combustion flue, a flue complementary combustor is mounted on the complementary combustion flue, and an outlet of the complementary combustion flue is connected with an outlet flue by a gas turbine waste heat boiler. The waste heat boiler system device with the gas turbine shutdown complementary combustion function has the advantage that the problem of incapability of operating complementary combustion waste heat boilers once gas turbines are shut down when the complementary combustion gas turbine waste heat boilers are used in the field of gas-fired power plants and natural gas distributed power stations can be effectively solved by the aidof the waste heat boiler system device.

Description

technical field [0001] The invention relates to a waste heat boiler system device with the function of afterburning when the gas turbine is shut down, and belongs to the technical field of waste heat boilers. Background technique [0002] In the application field of gas-fired power stations and natural gas distributed energy stations, more and more gas turbine waste heat boilers with flue supplementary combustion devices are used by customers. , Electricity demand. [0003] Conventional flue afterburning gas turbine waste heat boiler system, such as figure 1 As shown, it is mainly composed of gas turbine a, gas exhaust extension flue b, flue afterburner c, afterburner flue d, gas turbine waste heat boiler e and outlet chimney f. The remaining oxygen in the gas (accounting for about 15% by volume), the fuel (generally natural gas) is connected to the special flue after-burner c for combustion, without providing combustion-supporting air, to increase the temperature of the e...

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Problems solved by technology

Such a backup gas boiler configuration also leads to a substantial increase in the customer's investment and operating costs, especially factors such as the large area occupied by the gas boiler, the large number of auxiliary equipment, the high operating power consumption and the high failure rate will lead to an increase in the heating cost of the user

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