Energy-saving and emission-reducing device used in processes of boiler lifting and stopping and temporary banking fire in thermal power plant

Abstract

The invention discloses an energy-saving and emission-reducing device used in the processes of boiler lifting and stopping and temporary banking fire in a thermal power plant. The energy-saving and emission-reducing device comprises a main steam supply channel, a plurality of steam turbine steam inlet mother tubes connected to the main steam supply channel in parallel, and a plurality of boiler steam mother tubes. Boiler grid-connection isolation valves are arranged on the portions, entering the main steam supply channel, of the boiler steam mother tubes. The energy-saving and emission-reducing device is characterized in that the main steam supply channel is further connected with a pressure and temperature reduction station; an auxiliary tube connected with the boiler steam mother tubes is arranged beside the main steam supply channel, and one end of the auxiliary tube is connected into the positions, above the grid-connection isolation valves, of the boiler steam mother tubes; and the other end of the auxiliary pipe is connected into the pressure and temperature reduction station. According to the energy-saving and emission-reducing device used in the processes of boiler liftingand stopping and temporary banking fire in the thermal power plant, the energy loss in ignition can be effectively reduced to the minimum, exhausting of gas into air in the boiler lifting and stoppingprocesses is avoided, and noise is reduced; and in the boiler lifting stage, heat can be supplied, and after boiler stopping, heat supplying can be conducted through boiler waste heat for a period oftime; and economic benefits are greatly increased, and grid-connection safety is improved.

Description

technical field [0001] The invention relates to the energy-saving technology of a thermal power plant, in particular to an energy-saving and emission-reducing device for a thermal power plant boiler in the process of raising and shutting down a boiler and temporarily suppressing fire. Background technique [0002] Generally, boilers in thermal power plants have a relatively fixed operating cycle, and each boiler has several or even more than ten shutdowns in a year, especially in power plants supplied by fluidized bed garbage furnaces. Every time the furnace is raised, because the steam pressure and temperature do not meet the grid connection requirements, the unqualified steam must be exhausted from the empty steam exhaust valve and steam trap to the air, which not only consumes electricity, oil, coal and make-up water, etc. Raw materials, but also generate greater noise, affecting the environment, such as image 3 As shown, similarly, the boiler after the shutdown also has...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of waste of heat energy in the process of heating up, shutting down the boiler, and temporarily pressing the fire of the thermal power plant boiler, and to provide a thermal power plant boiler that can reduce fuel consumption during ignition, eliminate exhaust noise, and utilize residual heat energy. Energy Saving and Emission Reduction Devices During Boiler Shutdown

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