Rotary type air pre-heater and secondary air side air-leaking-reducing and plugging-preventing method thereof

Abstract

The invention provides a rotary type air pre-heater and a secondary air side air-leaking-reducing and plugging-preventing method thereof. According to the rotary type air pre-heater, a radially-extending fan-shaped partition plate is arranged in a secondary air inlet in the bottom of a secondary air bin and partitions the secondary air bin into fan-shaped heating partition bins. The secondary airside air-leaking-reducing and plugging-preventing method comprises the step that smoke gas with the temperature higher than 300 DEG C is utilized to heat a heat exchange element which rotates out of the secondary air bin and is about to rotate into a smoke gas bin. Through the technical scheme, according to the temperature of the heat exchange element of the cold end of the rotary type air pre-heater, the heating smoke gas quantity is adjusted, (NH4)HSO4 on the surface of the heat exchange element is dissolved through hot furnace smoke, the temperature of the heat exchange element of the coldend of the air pre-heater, and thus the problem of ash plugging of a rotary type air pre-heater is fundamentally solved. The furnace smoke is led into the secondary air side so that the combustion temperature of a hearth can be decreased, and the certain inhibiting effect on NOX generation caused by boiler combustion is achieved. Through the heating partition bins, the secondary air side and the smoke gas side are thoroughly isolated, and air leaking of the rotary type air pre-heater is reduced.

Description

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AI Technical Summary

Benefits of technology

Technologies described are improvements made for improving the performance of an air pretreater used with a coal fired power plant or other industrial processes where high temperatures occur during startup. These modifications aim to prevent fouling caused by excessive amounts of thermal energy released when starting up after shutdowns while maintain good efficiency. By adding sulfuric acid solution onto specific areas near the entrance of the primary air chamber, which helps remove deposits formed due to burning fuel before entering the main body of the machine, these techniques help improve durability without causing problems such as increased emissions associated therewith.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency and reliability of air conditioners that combines their functions into one system without increasing pressure drop or overloading components such as fans due to high temperatures caused by the exhaust gases from these devices.

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