A zone-controlled sonic soot blower and its control method

Abstract

The invention provides an area control sonic sootblower and its control method, comprising an acoustic wave generator, an acoustic wave horn and an acoustic area control system; The sound transmission horn is connected with the sound wave generator; the dust removal room is provided with an ash removal area and a dust avoidance area, and a plurality of electric fields are arranged in the dust removal room, and at least one first sensor is installed in the dust removal area in each electric field; each electric field At least one second sensor is installed in the dust-avoiding area within; the sound wave area control system controls the frequency emitted by 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 sound transmission horn. , intensity and phase. The invention adopts a frequency-adjustable acoustic wave soot blower and an area control method, which can ensure the effective removal of ammonium bisulfate and avoid secondary dust raising.

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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