Online automatic cleaning device for thermal power plant air pre-heater

Abstract

The invention belongs to the technical field of industrial cleaning, and discloses an online automatic cleaning device for a thermal power plant air pre-heater. The online automatic cleaning device includes a rail, a tube twisting device, and a high-pressure water trolley; the tube twisting device is arranged on one end of the rail; the high-pressure water trolley is arranged on the rail; the high-pressure water trolley includes a frame, a sprayer steel tube, and wheel assemblies; the sprayer steel tube is fixed on the frame; a plurality of spraying nozzles are arranged on the sprayer steel tube; and the wheel assemblies are arranged under the frame. In cleaning, the tube twisting device and the high-pressure water trolley can convey a high-pressure rubber tube to a position to be cleaned, the high-pressure rubber tube is cleaned by the spraying nozzles arranged on the sprayer steel tube, the cleaning range can cover the whole air pre-heater, and the air pre-heater can be cleaned all round; when the air pre-heater is blocked seriously and the pressure difference is large, the thermal power plant can start the online automatic cleaning device to clean the air pre-heater according to the power generation load, in this time, the air pre-heater may work all the time without stopping, and real-time online cleaning can be achieved; and the online automatic cleaning device is safe and rapid, can save labors, can improve the cleaning efficiency, and can achieve an ideal cleaning effect.

Description

technical field [0001] The invention belongs to the technical field of industrial cleaning, and in particular relates to an online automatic cleaning device for an air preheater in a thermal power plant. Background technique [0002] Air preheater, the full name is air preheater, is a device used to preheat the air entering the furnace for auxiliary combustion with flue gas to meet the specified process requirements. It is an industrial application of convective heat transfer and heat conduction. After the denitrification device is turned on in the thermal power plant, the air preheater is used with the operation, and the blockage changes from the original fly ash to ammonium bisulfate scale, which is attached to the heat storage element of the air preheater, blocking the air flow channel and causing damage to the heat storage element. Corrosion occurs, so it needs to be cleaned or cleaned every once in a while. When the cleaning equipment in the prior art cleans the air pre...

AI Technical Summary

Problems solved by technology

After the denitrification device is turned on in the thermal power plant, the air preheater is used with the operation, and the blockage changes from the original fly ash to ammonium bisulfate scale, which is attached to the heat storage element of the air preheater, blocking the air flow channel and causing damage to the heat storage element. Corrosion occurs, so it needs to be cleaned or cleaned every once in a while. When the cleaning equipment in the prior art cleans the air preheater, it is mainly carried out by air blowing, but because the viscosity of ammonium bisulfate scale is relatively Strong, using this method will result in incomplete cleaning

And because the temperature of the air preheater is close to 200°C when it is working, the staff are not allowed to enter, so every time it is thoroughly cleaned, the furnace needs to be shut down before operation, which will cause great obstacles to the operation of the power plant and cause very large economic losses.

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