Boiler material returning air system

Abstract

A boiler return air system relates to the technical field of boiler return air system design. The present invention includes a first air cooler, a second air cooler, a cold air inlet damper, a material return fan, a material return system, a primary fan, a primary air pre-air device, a primary hot air, a hot air inlet damper and a furnace; An input end and a second input end; the primary hot air includes a first hot air outlet and a second hot air outlet; the output end of the first cooling fan is connected to the input end of the cold air inlet damper; the output end of the cold air inlet damper is connected to the first return fan. input. In the present invention, the inlet air of the original boiler feed fan is connected to the outlet of the primary air pre-heater of the boiler (the air temperature at the outlet of the primary air pre-air pre-heater is about 150°C, and the wind pressure is about 10KPa). The structure is simple and reasonable, which increases the return air pressure, increases the return air temperature, improves the boiler efficiency, and saves fuel costs.

Description

technical field [0001] The invention relates to the technical field of design of a boiler return air system. Background technique [0002] The return air is the source of power to push the high-temperature materials separated by the circulating ash cyclone separator back to the furnace, and it plays a role in loosening and fluidizing the circulating materials. The inlet air of the raw material return fan usually takes the air source from the cold section of the outlet of the primary fan, which is the cold air in the natural environment (around 20°C at room temperature). The disadvantage is that the return air pressure is low, the return air temperature is low, and the boiler efficiency is not high. Fuel costs are high. Contents of the invention [0003] The object of the present invention is to solve the above problems and provide a boiler return air system that increases the return air pressure, increases the return air temperature, improves boiler efficiency, and saves ...

AI Technical Summary

Problems solved by technology

The inlet air of the raw material return fan usually takes the air source from the cold section of the outlet of the primary fan, which is the cold air in the natural environment (around 20°C at room temperature). The disadvantage is that the return air pressure is low, the return air temperature is low, and the boiler efficiency is not high. high fuel costs

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