Soot blowing system and method used for boiler horizontal flue

Abstract

The invention relates to a soot blowing system and method used for a boiler horizontal flue. The soot blowing system and method are mainly used in a coal-fired boiler. The soot deposition phenomenon is serious at the furnace arch of the coal-fired boiler horizontal flue, and no effective solution exists at present. The soot blowing system comprises a compressed air main pipe and a plurality of soot blowing units. Each soot blowing unit comprises a compressed air branch pipe, a manual brake valve, an electromagnetic valve, a pressure gauge, a plurality of air caps and a plurality of anti-abrasion tiles. The soot blowing system is characterized in that the compressed air branch pipes are connected with the compressed air main pipe; the manual brake valves, the electromagnetic valves and the pressure gauges are all installed on the compressed air branch pipes so that each compressed air branch pipe can achieve the function of blowing soot alone; the manual brake valves, the electromagnetic valves and the pressure gauges are all located outside the boiler; the air caps are directly fixed to two adjacent fins of two adjacent water cooling wall pipes in the boiler; the air caps and the compressed air branch pipes are connected; and the anti-abrasion tiles are installed on the water cooling wall pipes in a sleeving mode. According to the soot blowing system and method used for the boiler horizontal flue, adjusting is convenient, and the soot blowing effect is good.

Description

technical field [0001] The invention relates to a soot blowing system and a soot blowing method for a horizontal flue of a boiler, which are mainly used in coal-fired boilers. Background technique [0002] Coal-fired boiler horizontal flue flame corners usually have serious ash deposits. Severe ash deposits not only reduce the heat exchange surface between the flue gas and the heat exchanger, but also reduce the heat exchange effect of the heat exchanger, and also change the smoke flow field. Aiming at the serious ash accumulation at the flame angle of the horizontal flue of the coal-fired boiler, many solutions have emerged at home and abroad. [0003] For example, the Chinese patent whose publication number is CN104180379A discloses a soot blowing method and device for a π-type boiler horizontal flue, which consists of a temperature measurement system, a control module and a soot blowing system. The first temperature detector and the second temperature detector on the du...

AI Technical Summary

Problems solved by technology

As a result, when the soot blowing system uses compressed air as the soot blowing medium, some power plants can effectively solve the problem of coal-fired boiler horizontal smoke due to the insufficient margin of the compressed air source or the limited installation space of the soot blowing system. The problem of dust accumulation at the flame corner of the road

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