Ash injector fo gas pulsing weak-explosion wave

Abstract

The invention comprises a combustible gas source, a flow-measuring unit for controlling the ratio of the premix gas, a mixing ignition unit for mixing the premix gas uniformly and lighting the premix gas to produce weak explosive wave high-speed jet, a soot-blowing power unit for speeding-up the spread of the gas flow flame and transmitting the spherical shock wave to the heating surface needing soot-blowing and a soot-blowing control unit for realizing automatically all kinds of soot-blowing operations according to the requirement of the given working process by collecting the field switch quantity signal and the analog quantity signal.

Description

technical field [0001] The invention relates to a boiler soot blowing device, in particular to a gas pulse weak explosion wave soot cleaner used for soot blowing at the heated area of ​​the boiler tail of a coal-fired power plant. Background technique [0002] At present, in the power industry, it is necessary to remove the ash and slagging on the heating surface of the boiler and keep it clean to ensure safe and economical operation of the boiler. According to tests, the thermal conductivity of the ash layer is only 1 / 400 to 1 / 1000 of that of the metal pipe wall. Therefore, if the heating area of ​​the boiler is ash, the heat transfer will deteriorate, the exhaust gas temperature will increase, the heat loss of the exhaust gas will increase, and the boiler will be reduced. Thermal efficiency. The ash accumulation will block the flue, which will increase the flow resistance of the convection flue, increase power consumption, and reduce the output of the boiler. In severe ca...

AI Technical Summary

Problems solved by technology

Although most of the heating surfaces of boilers at home and abroad are equipped with the above-mentioned traditional soot blowing devices, the efficiency is low and most of them are idle.

The common disadvantages of the above-mentioned sootblowing methods are that the sootblowing energy intensity is not enough and the scope of action is limited. For example, the airflow jet or disturbance generated by steam and air sootblowing has a lower energy upper limit, and the sound velocity airjet generated by sonic sootblowing in space is based on The speed of sound is the disturbance wave whose propagation speed is limited by the expansion wave performance, and its intensity cannot be increased, and some soot blowing methods have high energy consumption, poor equipment reliability, complicated maintenance, and damage to the heating surface, etc.

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