A large-space descaling device with aeroacoustic composite field uniform distribution and its descaling method

Abstract

The invention discloses a large-space descaling device and a descaling method with an evenly distributed aeroacoustic composite field. The descaling device includes a device inlet, an aeroacoustic field-distributed space, an acoustic soot blowing device, a descaling space, and a device outlet. Among them, there is an aero-acoustic field arrangement space behind the device entrance, a sonic soot blowing device is installed in the aero-acoustic field arrangement space, a descaling space is set after the aero-acoustic field arrangement space, and a device outlet is set after the aero-acoustic field arrangement space; An aeroacoustic deflector is arranged behind the sonic soot blowing device in the space, and the sounding direction of the sonic soot blowing device faces the aeroacoustic deflector. The descaling method is that after the airflow enters the device, the airflow is firstly averaged to form the airflow after the average flow, and then it is fluidized together with the sound waves emitted by the sonic soot blowing device in the aeroacoustic average field layout space, and then the airflow is averaged by the aeroacoustic deflector. After flow and rectification, it enters the descaling space to descale the equipment set in the descaling space, and at the same time, it can effectively prevent local serious scaling.

Description

technical field [0001] The invention relates to a large-space descaling device and a descaling method with an aeroacoustic composite field uniform distribution and belongs to the field of environmental protection equipment. Background technique [0002] With the increasingly stringent energy conservation and emission reduction standards, the energy conservation and emission reduction work of large thermal power units has been paid more and more attention. The boiler is the core equipment of the thermal power station and one of the key links in the energy conversion of the thermal power station. The thermal efficiency of the boiler directly affects the fuel utilization rate of the thermal power station. During the production and operation of coal-fired boilers, the problem of fouling on the heating surfaces (water walls, superheaters, economizers, preheaters) and flue ducts has long plagued power production, and the thermal efficiency of coal-fired boilers cannot reach impor...

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Problems solved by technology

[0004] There are many unsolvable problems in the steam sootblower: it is easy to cause the sootblower to be stuck in the furnace during operation, resulting in mechanical jamming, high failure rate, short service life, high energy consumption, easy to cause pipe burst accidents, and common air leakage; The moisture content in the flue gas is high, the dew point of the flue gas is high; the operating cost is high, the cost of boiler feed water and water treatment is high, and the workload of repair and maintenance is large; Inner heating surface wear

Due to the limited sound energy of the traditional sonic soot blower, the sound frequency is fixed, which is very different from the natural frequency of the ash particles, and it is not suitable for the characteristics of ash accumulation. Prevents soot build-up during its soot blowing

Mechanical and electromagnetic rapping due to insufficient rapping force and easy damage to the equipment, the descaling effect is not ideal

At present, the air distribution plate generally adopts a single-layer setting, because the optimal opening ratio and the optimal hole shape are difficult to determine, so it is difficult to achieve the ideal air distribution effect

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