In the field of heat supply, due to the improper operation of water treatment equipment, the softened water that does not meet the softening requirements is directly fed into the system, so that the soluble calcium and magnesium salts in the water are decomposed into calcium carbonate and magnesium hydroxide when heated, and the precipitates are bound on the heating surface of the heat exchanger, Hard scale formed. Due to the poor thermal conductivity of scale, the heat exchange efficiency of heat exchanger is reduced and the system resistance is increased, which affects the heating effect and causes serious energy waste to heating units. In the industrial system, the fluid with particles and fibers enters the heat exchanger. When the flow rate of the heat exchanger is unreasonable or the flow channel width is less than the allowable width, the particles and fibers will slowly deposit at the bottom of the flow channel of the heat exchanger, resulting in poor flow of the heat exchanger and increasing resistance. In serious cases, the heat exchanger will not exchange heat, which seriously affects the process operation of the system.