Area control sound wave soot blower and control method

Abstract

The invention provides an area control sound wave soot blower and a control method. The area control sound wave soot blower comprises sound wave generators, sound wave sound transmission horns and a sound wave area control system. The plurality of sound transmission horns are uniformly distributed and mounted at an inlet of a dust removal chamber, and each sound transmission horn is connected with the sound wave generator; an ash removal area and a dust raising prevention area are arranged in the dust removal chamber, a plurality of electric fields are arranged in the dust removal chamber, and at least one first sensor is mounted in the ash removal area in each electric field; at least one second sensor is mounted in the dust raising prevention area in each electric field; the sound wave area control system controls the frequency, intensity and phase of each sound wave generator according to the detection value of the first sensor, the detection value of the second sensor and the position of the sound wave transmission horn. By the adoption of the frequency-adjustable sound wave soot blower and the area control method, ammonium hydrogen sulfate is effectively removed, and reentrainment of dust is avoided.

Description

technical field [0001] The invention relates to the field of environmental protection dust removal or the field of dust removal in a dust removal chamber, in particular to an area-controlled sonic soot blower and a control method. Background technique [0002] In the entire ultra-low emission transformation process of thermal power generation, the efficient and clean operation of electrostatic precipitator equipment plays a vital role, and its dust removal efficiency directly affects the effect of downstream flue gas desulfurization, ultrafine particle treatment and other process equipment, but currently During operation, the electrostatic precipitator has serious dust and fouling, which cannot be solved by the existing rapping method, which leads to an increase in the burden on downstream equipment, poor effect, and excessive emission of particulate matter. The main reasons are as follows: [0003] (1) In order to ensure the denitrification efficiency of the upstream denitr...

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Problems solved by technology

[0002] In the entire ultra-low emission transformation process of thermal power generation, the efficient and clean operation of electrostatic precipitator equipment plays a vital role, and its dust removal efficiency directly affects the effect of downstream flue gas desulfurization, ultrafine particle treatment and other process equipment, but currently During operation, the electrostatic precipitator has serious dust and fouling, which cannot be solved by the existing rapping method, which leads to an increase in the burden on downstream equipment, poor effect, and excessive emission of particulate matter. The main reasons are as follows:

[0003] (1) In order to ensure the denitrification efficiency of the upstream denitrification equipment of the electrostatic precipitator, excessive ammonia is sprayed during operation, causing ammonia to escape, resulting in the anode plate / cathode line of the electrostatic precipitator attached to the ammonium bisulfate scaling, the dust removal efficiency is reduced and the energy consumption is increased

[0004] (2) The electrostatic precipitator now adopts the method of mechanical vibration to remove dust, but this method can only solve the ordinary dust, and it is powerless to the scaling of ammonium bisulfate, so it is difficult to ensure the clean and efficient operation of the equipment

[0005] (3) The existing mechanical rapping method for ash removal is easy to cause fatigue damage to equipment, and generate secondary dust, and cause smoke particles to escape, reducing dust collection efficiency

[0006] Aiming at the problem of electrostatic precipitator, some enterprises have tried to adopt acoustic wave soot blowing technology and achieved certain results. However, due to the characteristics of electrostatic precipitator equipment, especially the control of secondary dust, no matter whether it is resonance type, flute or other acoustic wave soot blower can't be solved well

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