Foam suction process control method of mechanical defoaming system for strip steel cleaning
A mechanical defoaming and process control technology, applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve problems such as increasing production costs and environmental protection pressure, destroying the tightness of steel plates and coatings, and leaking iron from galvanized steel plates , to achieve low operating costs, simple and easy control methods, and reduce the pressure on environmental protection
Inactive Publication Date: 2020-06-05
UNIV OF SCI & TECH LIAONING
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Problems solved by technology
No matter which method is used, it not only requires a high cost, but also the silicone oil in the defoamer will destroy the tightness of the steel plate and the coating, causing serious problems of iron leakage on the galvanized steel plate, and also increasing the production cost and environmental protection pressure
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[0025] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0026] like figure 1 As shown, a method for controlling the foam absorption process of a mechanical defoaming system for strip steel cleaning according to the present invention, the mechanical defoaming system includes an lye tank 1 and a defoaming tank 2; the top of the lye tank 1 is provided with The foam outlet, the foam outlet is connected to the inlet of the foam suction pump 4 through the foam suction pipe 3, and the foam suction pipe is provided with a pneumatic regulating valve 5; Connected to the defoaming box 2, the rotating defoaming column 6 is provided with spiral blades; the top of the defoaming box 2 is provided with a gas phase outlet, and the bottom is provided with a liquid phase outlet;
[0027] The foam-absorbing working process of the mechanical defoaming system is as follows: the foam on the upper part of the liquid level of...
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The invention relates to a foam suction process control method of a mechanical defoaming system for strip steel cleaning. The control method comprises the following steps: after a foam suction systemhas a starting condition, a motor of a foam suction pump starts to operate according to a set rotation speed; if overload occurs, speed reduction adjustment is conducted firstly, if overload still occurs, a pneumatic unloading switch valve is opened and closed after being opened for 30 s; and if the foam suction pump is still overloaded after unloading, the opening degree of a pneumatic control valve is adjusted, and the opening degree is reduced by 20% every 60 s until the rotating speed of the motor is increased to 2800 rmp and the motor is still not overloaded. The defoaming effect is improved by controlling the foam suction process, the control method is simple and easy to implement, the operation cost is low, the defoaming cost can be reduced, no pollution is caused in the defoaming process, most foam can be effectively eliminated, the defoaming rate is larger than or equal to 80%, therefore the surface cleaning quality of strip steel is improved, and the quality defect of iron leakage on the surface of the coated strip steel is avoided.
Description
technical field [0001] The invention relates to the technical field of steel plate surface treatment, in particular to a method for controlling the foam absorption process of a mechanical defoaming system for strip steel cleaning. Background technique [0002] Cleaning is one of the essential processes in the surface treatment of the strip steel production process. It is used to remove residual iron powder, grease and other attachments on the strip steel surface to improve the cleanliness of the strip steel surface and increase the quality of subsequent annealing and galvanizing processes. Excellent adhesion, to avoid quality defects of iron leakage on the surface of the coated strip. [0003] The degreasing agent for cleaning is produced by alkali compound surfactant, and usually adopts the method of spraying brush roll and electrolytic cleaning to produce physical and chemical effects on the surface of strip steel, so as to realize the effect of cleaning the surface of ste...
Claims
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IPC IPC(8): B01D19/00C23G1/19C23G3/02
CPCB01D19/0052B01D19/0073C23G1/19C23G3/025
Inventor 刘洪宇刘俊清
Owner UNIV OF SCI & TECH LIAONING