Dry ice cleaning method and dry ice cleaning machine for furnace tube

Abstract

The invention belongs to the field of petrochemical equipment cleaning, and particularly relates to a dry ice cleaning method and a dry ice cleaning machine for a furnace tube. The dry ice cleaning machine for the furnace tube comprises a main box body, wherein a hopper, a vibrator, a stirring roller, a flow sensor, a feeding box, an airlock feeder, a high-speed air pipeline, a T-shaped groove, a high-speed air nozzle, a hose and a spray gun are arranged in the main box body; and a convergent flow distribution nozzle is installed on a spray gun head and provided with a nozzle connector, a nozzle neck, a first nozzle diffusion part and a second nozzle diffusion part. The corresponding dry ice cleaning method comprises the steps that dry ice is put into the hopper, compressed air is sequentially treated through the air compressor and a drying machine and then conveyed to the high-speed air pipeline, the convergence flow distribution nozzle is aligned to the scaling position of an economizer, and the dry ice cleaning machine is operated to start cleaning. The problem that after a waste heat boiler is used for a long time, scale deposition of the economizer seriously affects the heat recovery efficiency and even affects unit operation safety is solved, and the problem that a traditional cleaning method is poor in effect is solved.

Description

technical field [0001] The invention belongs to the field of petrochemical equipment cleaning, and in particular relates to a dry ice cleaning method and a dry ice cleaning machine for furnace tubes. Background technique [0002] Petrochemical equipment often uses various furnace tubes such as waste heat boilers, economizers, and convection chambers. The waste heat boiler is a boiler that recovers waste gas, waste material or waste heat generated in chemical production and the heat generated by the combustion of combustible substances, and uses the recovered heat to produce hot water or steam for use in other sections. Fuel, gas, and coal are burned to produce high-temperature flue gas to release heat. The high-temperature flue gas first enters the furnace, then enters the waste heat recovery device of the front smoke box, then enters the pyrotechnic tube, and finally enters the waste heat recovery device in the flue of the rear smoke box. The flue gas becomes low-temperatu...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a dry ice cleaning method and a dry ice cleaning machine for furnace tubes, which solves the problem that after a waste heat boiler has been used for a long time, the fouling of the economizer seriously affects the heat recovery efficiency and even affects the operation safety of the unit , to solve the problem of slow washing speed with high-pressure water, incomplete cleaning, and water easily entering the rotary air preheater during washing, which may affect the safety of the electrical equipment of the unit

Solved the method of cleaning the economizer with chemical reagents, but it is easy to cause corrosion to the equipment, and the problem that the reagents and waste materials will also affect the environment if they are not properly disposed of

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