CN114574869A - Method, device and system for controlling defoaming process of degreasing and cleaning machine - Google Patents
Method, device and system for controlling defoaming process of degreasing and cleaning machine Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000004140 cleaning Methods 0.000 title claims abstract description 56
- 238000005238 degreasing Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 231
- 239000006260 foam Substances 0.000 claims abstract description 71
- 230000001276 controlling effect Effects 0.000 claims description 28
- 238000004886 process control Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 9
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 239000003518 caustics Substances 0.000 claims 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- 230000006870 function Effects 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000003860 storage Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000002518 antifoaming agent Substances 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000007127 saponification reaction Methods 0.000 description 4
- 229920002545 silicone oil Polymers 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005237 degreasing agent Methods 0.000 description 2
- 239000013527 degreasing agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- General Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The disclosure provides a method, a device and a system for controlling a defoaming process of a degreasing cleaning machine, wherein the method comprises the following steps: judging whether the automatic control starting condition is met; when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor; according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box, the pressure in the defoaming box is adjusted to eliminate foam, so that the defoaming rate is improved and the surface cleaning quality of the strip steel is improved by controlling the negative pressure stability of the defoaming box.
Description
Technical Field
The disclosure relates to the technical field of steel plate surface treatment, in particular to a method, a device and a system for controlling a defoaming process of a degreasing cleaning machine.
Background
Degreasing and cleaning are one of essential procedures for surface treatment in the production process of strip steel, and are used for removing residual iron powder, grease and other attachments on the surface of the strip steel so as to improve the surface cleanliness of the strip steel, increase the subsequent annealing quality and the adhesive force of a galvanizing procedure, and avoid the quality defect of iron leakage on the surface of the coated strip steel. The degreasing agent for cleaning is generated by compounding alkali with a surfactant, but the rolling oil, the alkali and the surfactant can generate saponification reaction, and foams are easily generated when the saponification component exceeds a certain concentration.
In the related art, a chemical foam suppressing means, that is, a means of reducing interfacial tension by adding an antifoaming agent containing silicone oil so that foam is broken, is often employed. The defoaming mode is high in cost, and silicone oil in the defoaming agent can destroy the compactness of the steel plate and the coating, so that the serious problem of iron leakage of the coated steel plate is caused, and meanwhile, the production cost and the environmental protection pressure are increased.
Disclosure of Invention
The present disclosure provides a method, an apparatus and a system for controlling a defoaming process of a degreasing cleaning machine, which aim to solve at least one of the technical problems in the related art to a certain extent.
An embodiment of a first aspect of the disclosure provides a method for controlling a defoaming process of a degreasing cleaning machine, which includes: judging whether the automatic control starting condition is met; when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor; and adjusting the pressure in the defoaming box according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box so as to eliminate foam.
An embodiment of a second aspect of the present disclosure provides a defoaming process control device for a degreasing cleaning machine, including: the judging module is used for judging whether the automatic control starting condition is met or not; the determining module is used for determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor when the automatic control starting condition is met; and the adjusting module is used for adjusting the pressure in the defoaming box according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box so as to eliminate foam.
An embodiment of a third aspect of the present disclosure provides a mechanical defoaming system for degreasing and cleaning, including: the device comprises a controller, an alkaline liquid tank, a bubble suction pump connected with the alkaline liquid tank, a rotary defoaming column connected with the bubble suction pump, and a defoaming tank; the top of the lye tank is provided with a foam outlet, the foam outlet is connected with an inlet of the foam suction pump through a foam suction pipe, and the foam suction pipe is provided with a pneumatic regulating valve; the outlet of the foam sucking pump is connected with the inlet of a rotary defoaming column, the outlet of the rotary defoaming column is connected with the defoaming box, and a helical blade is arranged in the rotary defoaming column; the top of the defoaming box is provided with a gas phase outlet which is connected with the lye tank through an exhaust pump; the bottom of the defoaming box is provided with a liquid phase outlet which is connected with the alkaline liquid box through a pneumatic liquid discharge pump; the defoaming box is internally provided with a flap valve driven by a stepping motor; the controller is respectively connected with the alkaline liquid tank, the bubble suction pump, the rotary defoaming column and the defoaming tank, and is used for executing the defoaming process control method for the degreasing cleaning machine disclosed by the embodiment of the disclosure.
An embodiment of a fourth aspect of the present disclosure provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of degreasing and cleaning mechanical defoaming process control of the embodiments of the present disclosure.
In a fifth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, in which computer instructions are stored, where the computer instructions are configured to cause the computer to execute the method for controlling a defoaming process of a degreasing cleaning machine disclosed in an embodiment of the present disclosure.
In the embodiment, whether the automatic control starting condition is met or not is judged; when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor; according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box, the pressure in the defoaming box is adjusted to eliminate foam, so that the defoaming rate is improved and the surface cleaning quality of the strip steel is improved by controlling the negative pressure stability of the defoaming box.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a method for controlling a defoaming process of a degreasing cleaning machine according to an embodiment of the disclosure;
FIG. 2 is a flow chart illustrating a mechanical defoaming process control for a degreasing cleaning machine according to another embodiment of the disclosure;
FIG. 3 is a flow chart of a method for controlling a defoaming process of a degreasing cleaning machine;
fig. 4 is a schematic structural diagram of a mechanical defoaming system for degreasing and cleaning provided by an embodiment of the disclosure;
fig. 5 is a schematic diagram of a degreasing cleaning mechanical defoaming process control device provided according to an embodiment of the disclosure;
FIG. 6 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
At present, degreasing and cleaning are one of essential procedures for surface treatment in the production process of strip steel, and are used for removing residual iron powder, grease and other attachments on the surface of the strip steel so as to improve the cleanliness of the surface of the strip steel, increase the adhesion of subsequent annealing quality and galvanizing procedures, and avoid the quality defect of iron leakage on the surface of the coated strip steel. The degreasing agent for cleaning is generated by compounding alkali with a surfactant, but the rolling oil, the alkali and the surfactant can generate saponification reaction, and foams are easily generated when the saponification component exceeds a certain concentration.
In the related art, a chemical foam suppressing means, that is, a means of reducing interfacial tension by adding an antifoaming agent containing silicone oil so that foam is broken, is often employed. The defoaming mode is high in cost, and silicone oil in the defoaming agent can destroy the compactness of the steel plate and the coating, so that the serious problem of iron leakage of the coated steel plate is caused, and meanwhile, the production cost and the environmental protection pressure are increased.
In order to solve the problems, the disclosure provides a method, a device and a system for controlling a defoaming process of a degreasing cleaning machine.
Fig. 1 is a schematic flow chart of a method for controlling a defoaming process of a degreasing cleaning machine according to an embodiment of the disclosure.
It should be noted that the executing main body of the degreasing cleaning mechanical defoaming process control method according to the embodiment of the disclosure may be a degreasing cleaning mechanical defoaming process control device, which may be implemented by software and/or hardware, and which may be configured in a controller, where the controller may be an electronic device, and the like.
The electronic device may be a Personal Computer (PC), a cloud device, a mobile device, and the like, and the mobile device may be a hardware device having various operating systems, touch screens, and/or display screens, such as a mobile phone, a tablet Computer, a Personal digital assistant, a wearable device, and an in-vehicle device.
As shown in fig. 1, the mechanical defoaming process control method for degreasing and cleaning may include the following steps:
step 101, determining whether the automatic control starting condition is provided.
In the embodiment of the present disclosure, the automatic control conditions of the mechanical defoaming system for degreasing and cleaning include: (1) the system communication is normal; (2) the system has no sudden stop; (3) switching on a bubble suction pump frequency converter; (4) the cooling fan of the bubble suction pump frequency converter has no fault; (5) opening a pneumatic regulating valve; (6) the exhaust pump is operated; (7) the pneumatic unloading valve is switched on; (8) the normal working control pressure of the electric control pressure reducing valve is more than 0.5 bar; (9) the pressure of a bubble suction pump sealing bag is more than 0.3 bar; (10) the pneumatic liquid discharge pump operates; (11) the level meter of the alkaline liquid tank works normally; (12) the level meter of the defoaming box works normally; (13) the pressure in the defoaming box is normal; (14) the liquid level in the defoaming box is normal.
And 102, when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor.
The bubble suction pump motor adopts variable frequency speed regulation, wherein the bubble suction pump consists of a vane pump and a motor, and the load characteristic of the motor is set as a fan-water pump type load.
In the embodiment of the disclosure, the set rotating speed of the bubble suction pump motor is determined according to the liquid level height, the limit liquid level height and the set liquid level height of the alkaline liquid tank, and the target rotating speed of the bubble suction pump motor is further determined according to the set rotating speed and the load condition of the bubble suction pump motor.
And 103, adjusting the pressure in the defoaming box according to the target rotating speed of the motor of the foam suction pump and the opening degree of a flap valve of the defoaming box to eliminate foam.
In the embodiment of the disclosure, the process of adjusting the pressure in the defoaming box is the process of making the defoaming box in a negative pressure state, and the defoaming effect is better because the foam is more easily broken in the negative pressure state. Degreasing cleaning machinery defoaming system is an organic system, the air that forms in the pairing rotation defoaming post that the defoaming case can circulate, alkali lye and a small amount of foam carry out the precipitation separation, with gas, liquid and foam discharge, the different load condition of bubble suction pump motor, the pressure that corresponds in the defoaming case also can change in real time, it is possible to be the malleation, with atmospheric pressure or negative pressure, need adjust the aperture of flap valve in the defoaming case through step motor this moment, rotation angle promptly, intervene the pressure in the defoaming case box, reach the negative pressure state, obtain better defoaming effect, the defoaming rate is improved.
It can be understood that after the bubbles are in the box body of the defoaming box, in the cleaning foam layer, suspension layers formed by the impurities and the water which are mutually staggered exist among the bubbles, the water flows downwards under the action of gravity and the internal pressure of the bubbles, and the liquid film becomes thinner gradually and is finally broken. The process of breaking the liquid film water layer is a process of merging bubbles, and small bubbles are changed into large bubbles to break. Negative pressure defoaming is that the foam expands and compresses the water layer between the bubbles to accelerate the speed of water downward flow in the liquid film, make the liquid film become thin gradually, the volume and the dispersion degree grow of foam, the mutual diffusion of bubble is the degree increase of combining. Due to the influence of the negative pressure on the bubbles, the foam is rapidly eliminated without influencing the properties of the base liquid of the foam.
In some embodiments, negative pressure control of a defoaming box body is a multivariable strongly-coupled parameter perturbation non-deterministic system, influence of parameter perturbation in suction and discharge rotation speed and opening of a regulating valve is considered, decoupling control of suction and discharge rotation speed and opening of the regulating valve is achieved, a free matrix and a weighting matrix are selected based on a Coprime decomposition theory, then a proper actual weighting function is selected according to control performance requirements, and a robust multivariable decoupling controller is designed, as shown in a formula (1):
wherein,
is a set value of the speed difference of the suction and exhaust motor, and V is the suction and exhaustThe actual value of the difference in the speed of the motor,
is the set value of the opening of the flap valve, M is the actual value of the opening of the flap valve, TVAs a function of the velocity effect, TMAs a function of the opening of the flap valve, KMσCoupling factor, K, caused by the adjustment of the opening of the flap valveVθJ is the Jacobian coefficient, K, for the coupling effect due to the speed regulation pressure of the suction motorVFor adjusting the coefficient of speed difference, KMIs the opening adjustment coefficient of the flap valve, delta V*Δ M is a suction/discharge motor speed variable (speed variable of a suction bubble pump motor speed and a discharge pump drive motor speed)*And the set point of the opening adjustment quantity of the flap valve is sigma which is the box body pressure of the defoaming box, and theta is the adjusting angle of the flap valve.
In the design of the robust decoupling controller, a weighting function array is selected as a diagonal array to ensure the decoupling requirement of a degreasing cleaning mechanical defoaming system, and as shown in a formula (2) and a formula (3), a sensitivity function W is supplemented when no special requirement exists3The choice of(s) may be the sensitivity function W1Reciprocal of(s):
where M is the cut-off frequency, s is the Laplace factor, A is the high frequency gain, ω is1＝100rad/s，ω3＝150rad/s。
In the embodiment of the disclosure, when the liquid level in the defoaming box is greater than a first liquid level threshold value, two pneumatic liquid discharge pumps connected with the defoaming box are controlled to operate for a preset time; when the liquid level in the defoaming box is smaller than a first liquid level threshold and larger than a second liquid level threshold, controlling one of the two pneumatic liquid discharge pumps to operate for a preset time; and when the liquid level in the defoaming box is less than a second liquid level threshold value, controlling the two pneumatic liquid discharge pumps not to operate.
Wherein, two pneumatic liquid discharge pumps are connected in parallel, one working and one standby. The first liquid level threshold value can be 225mm, the preset time can be 20 seconds, when the liquid level in the defoaming box is larger than 225mm, the two pneumatic liquid discharge pumps are started to operate, and the operation is stopped after 20 seconds; the second liquid level threshold value can be 180mm, the preset time can be 20 seconds, when the liquid level in the defoaming box is smaller than 225mm and larger than 180mm, one of the pneumatic liquid discharge pumps is started, and the operation is stopped after 20 seconds; when the liquid level in the defoaming box is less than 180mm, neither pneumatic liquid discharge pump is operated. Wherein, the pneumatic liquid discharge pump can be a pneumatic diaphragm liquid discharge pump.
In the embodiment of the disclosure, whether the automatic control starting condition is met or not is judged; when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor; according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box, the pressure in the defoaming box is adjusted to eliminate foam, so that the defoaming rate is improved and the surface cleaning quality of the strip steel is improved by controlling the negative pressure stability of the defoaming box.
Fig. 2 is a schematic flow chart of a method for controlling a defoaming process of a degreasing cleaning machine according to another embodiment of the disclosure, as shown in fig. 2, the method includes:
in step 201, it is determined whether or not the automatic control start condition is satisfied.
Step 202, determining the set rotating speed of the bubble suction pump motor under the liquid level height of the alkaline liquid tank according to the liquid level height of the alkaline liquid tank, the limit liquid level height and the set liquid level height.
In an embodiment of the disclosure, in an example, the procedure of the degreasing cleaning mechanical defoaming process control device performing step 202 may be, for example, comparing the liquid level height of the alkaline liquid tank with a set liquid level height when the liquid level height of the alkaline liquid tank is greater than or equal to the limit liquid level height; wherein the limit liquid level height is less than the set liquid level height; and when the liquid level height of the alkaline liquid tank is greater than or equal to the set liquid level height, determining the set rotating speed of the bubble suction pump motor to be a first rotating speed under the liquid level height of the alkaline liquid tank.
The limit liquid level height can be 2.0 meters, the set liquid level height can be 2.5 meters, the limit liquid level height can be the lower limit of the liquid level height of the alkaline liquid tank, and the set liquid level height can be the upper limit of the liquid level height of the alkaline liquid tank.
The first rotation speed can be 2600-3000 rpm, and can be set according to needs, for example, the first rotation speed can be 2800 rpm.
In another example, the step 202 may be executed by the degreasing and cleaning mechanical defoaming process control device, for example, when the liquid level height of the lye tank is less than the limit liquid level height, determining the set rotation speed of the defoaming pump motor at the liquid level height of the lye tank as the second rotation speed.
The second rotation speed may be 800-1200 rpm, which may be set according to actual needs, for example, the second rotation speed may be 1000 rpm.
In another example, the degreasing and cleaning mechanical defoaming process control device may perform the step 202 by, for example, determining the set rotation speed of the defoaming pump motor at the liquid level height of the alkaline liquid tank to be the third rotation speed when the liquid level height of the alkaline liquid tank is greater than or equal to the limit liquid level height and the liquid level height of the alkaline liquid tank is less than the set liquid level height.
The third rotation speed can be 1800-2200 rpm, and can be set according to requirements, for example, the third rotation speed can be 2000 rpm.
And step 203, determining the target rotating speed of the bubble suction pump motor according to the load condition of the bubble suction pump motor and the set rotating speed of the bubble suction pump motor under the liquid level height of the alkali liquor tank.
In the embodiment of the present disclosure, the step 203 executed by the defoaming process control device of the degreasing cleaning machine may be, for example, when the foam-absorbing pump motor is in an overload state, decreasing the set rotation speed of the foam-absorbing pump motor under the liquid level height of the alkaline liquid tank to obtain the processed rotation speed of the foam-absorbing pump motor; under the rotation speed after treatment, if the bubble suction pump motor is still in an overload state, the opening degree of a pneumatic regulating valve for connecting the lye tank and the bubble suction pump is regulated until the bubble suction pump motor is in a non-overload state; and taking the processed rotating speed as the target rotating speed of the bubble suction pump motor.
In the embodiment of the present disclosure, the method for determining the load state of the bubble suction pump by the defoaming process control device of the degreasing cleaning machine may be that the working current in the bubble suction pump motor is determined to be greater than the rated current, and the bubble suction pump motor is determined to be in the overload state. Wherein, the processed rotating speed of the bubble suction pump motor can be 2000 rpm.
In the embodiment of the present disclosure, if the bubble suction pump motor is still in an overload state at the post-processing rotation speed, the method of adjusting the opening degree of the pneumatic control valve may be to decrease the opening degree of the pneumatic control valve by 20% every 60 seconds until the bubble suction pump motor is in a non-overload state.
In the embodiment of the present disclosure, when the bubble suction pump motor is in a non-overload state, the opening degree of the pneumatic adjustment valve is maintained, and the rotational speed of the bubble suction pump motor is set to 2800 rpm.
And 204, adjusting the pressure in the defoaming box according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box to eliminate foam.
It should be noted that details of step 201 and step 204 may refer to step 101 and step 103 in the embodiment shown in fig. 1, and detailed description is not repeated here.
In the embodiment of the disclosure, whether the automatic control starting condition is met or not is judged; determining the set rotating speed of a bubble suction pump motor under the liquid level height of the alkaline liquid tank according to the liquid level height of the alkaline liquid tank, the limit liquid level height and the set liquid level height; determining the target rotating speed of the bubble suction pump motor according to the load condition of the bubble suction pump motor and the set rotating speed of the bubble suction pump motor under the liquid level height of the alkaline liquid tank; according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box, the pressure in the defoaming box is adjusted to eliminate foam, so that the defoaming rate is improved and the surface cleaning quality of the strip steel is improved by controlling the negative pressure stability of the defoaming box.
For example, fig. 3 is a flowchart of a method for controlling a defoaming process of a degreasing cleaning machine, and as a preferred embodiment, it is first determined whether an automatic control start condition is met, and if the automatic control start condition is not met, the method cannot be continuously executed, after the automatic control start condition is met, a bubble suction pump is set in a constant power mode, the bubble suction pump is set as a fan-water pump load, when a liquid level of an alkaline liquid tank (a liquid level height of the alkaline liquid tank) is determined to be less than 2.0 meters, a rotation speed of a motor of the bubble suction pump is set to 1000rpm, when the liquid level of the alkaline liquid tank is determined to be greater than or equal to 2.0 meters, the rotation speed of the motor of the bubble suction pump is set to 2800rpm, and when the liquid level of the alkaline liquid tank is determined to be less than 2.5 meters, the rotation speed of the motor of the bubble suction pump is set to 2000 rpm. And further judging whether the bubble suction pump is overloaded, taking the current set rotating speed of the bubble suction pump motor as 2800rpm as an example, when the bubble suction pump is not overloaded, keeping the opening degree of the pneumatic regulating valve and the rotating speed of 2800rpm, when the bubble suction pump is overloaded, setting the rotating speed of the bubble suction pump as 2000rpm, judging whether the bubble suction pump at the rotating speed is overloaded, if the bubble suction pump at the rotating speed is still overloaded, reducing the opening degree of the pneumatic regulating valve by 20 percent until the bubble suction pump is not overloaded, and continuing to perform negative pressure control on the defoaming box.
In the embodiment of the disclosure, after the automatic control starting condition is met, the bubble suction pump is set to be in a constant power mode and the load of the fan water pump, and the pressure in the defoaming box is controlled to enable the defoaming box to be in a negative pressure state, so that the defoaming rate is improved, and the surface cleaning quality of the strip steel is improved.
Fig. 4 is a schematic structural diagram of a mechanical defoaming system for degreasing and cleaning according to an embodiment of the disclosure. As shown in fig. 4, the mechanical defoaming system for degreasing and cleaning comprises: the device comprises a controller 15, an alkaline liquid tank 1, a foam suction pump 4 connected with the alkaline liquid tank 1, a rotary defoaming column 6 connected with the foam suction pump 4, a defoaming tank 2, a foam suction pipe 3, a pneumatic regulating valve 5, a pneumatic liquid discharge pump 7, an electric control pressure reducing valve 8, a switch valve 9, an exhaust pump 10, a pneumatic unloading valve 11, a foam suction pump sealing bag 12, an exhaust pump sealing bag 13 and a flap valve 14 for driving a stepping motor; the top of the alkaline solution tank 1 is provided with a foam outlet, the foam outlet is connected with an inlet of the foam suction pump 4 through a foam suction pipe 3, and the foam suction pipe is provided with a pneumatic regulating valve 5; wherein, the outlet of the foam sucking pump 4 is connected with the inlet of a rotary defoaming column 6, the outlet of the rotary defoaming column 6 is connected with the defoaming box 2, and a helical blade is arranged in the rotary defoaming column; wherein the top of the defoaming box 2 is provided with a gas phase outlet which is connected with the lye tank 1 through an exhaust pump 10; the bottom of the defoaming box 2 is provided with a liquid phase outlet which is connected with the alkaline liquid box 1 through a pneumatic liquid discharge pump 7; wherein, a flap valve 14 driven by a stepping motor is arranged in the defoaming box; wherein, an electric control pressure reducing valve 8 and a switch valve 9 are arranged in sequence along the gas flowing direction; a switch valve 9 and a pneumatic liquid discharge pump 7 are sequentially arranged along the liquid discharge direction; wherein, the bubble suction pump 4 is externally provided with a bubble suction pump sealing bag 12, and the exhaust pump 6 is externally provided with an exhaust pump sealing bag 13; wherein, the bubble suction pump sealing package 12 is provided with a pneumatic unloading valve 11, and the exhaust pump sealing package 13 is provided with a pneumatic unloading valve 11.
Wherein, the controller 15 (not shown in fig. 4) determines whether the automatic control starting condition of the defoaming system of the degreasing cleaning machine is met or not, and determines the target rotating speed of the foam suction pump motor according to the liquid level of the alkaline liquid tank and the load condition of the foam suction pump motor when the automatic control starting condition is met; and further adjusting the pressure in the defoaming box according to the target rotating speed and the opening degree of a flap valve of the defoaming box to enable the defoaming box to be in a negative pressure state so as to eliminate foam and improve the defoaming rate.
The working process of the mechanical defoaming system for degreasing and cleaning comprises the following steps: the foam at the upper part of the liquid level of the alkaline liquid tank 1 is sucked by a foam sucking pump 4, the suction force is adjusted by the opening of a pneumatic adjusting valve 5, the foam is accelerated by the foam sucking pump 4 and then discharged from an outlet, the foam enters a rotary defoaming column 6, and most of the foam is broken under the action of rotary defoaming and negative pressure of a defoaming tank to form air, alkaline liquid and a small amount of foam; after the precipitation and separation of the defoaming box 2, the liquid is discharged back to the alkaline liquid box 1 through the pneumatic liquid discharge pump 7, the air and the residual foam are discharged back to the alkaline liquid box 1 through the exhaust pump 10, and the steps are repeated in such a circulating way to complete the defoaming process.
In the disclosed embodiment, the exhaust pump 10 is set to operate in a constant power mode; the exhaust pump 10 starts to operate according to the set rotating speed of 2000rpm, and when the pressure in the defoaming box 2 is less than-2 bar, the rotating speed of a driving motor in the exhaust pump 10 is set to 1800 rpm; when the pressure in the defoaming box 2 is more than-2 bar and less than 0bar, the rotating speed of a driving motor in the exhaust pump 10 is set to 2000 rpm; when the pressure in the defoaming box 2 is greater than 0bar, the rotating speed of a driving motor in the exhaust pump 10 is set to 2500rpm, and if the fluctuation of the negative pressure value is greater than +/-0.5 bar, the flap valve 14 is opened for adjustment, so that the stability of the negative pressure of the defoaming box is ensured. The exhaust pump 10 is composed of a vane pump and a driving motor thereof, and the load characteristic of the driving motor is a fan-water pump type load.
Fig. 5 is a schematic diagram of a defoaming process control device of a degreasing cleaning machine according to an embodiment of the disclosure. As shown in fig. 5, the defoaming process control device 500 for the degreasing cleaning machine includes: a determination module 510, a determination module 520, and an adjustment module 530; the judging module 510 is configured to judge whether an automatic control starting condition is met; the determining module 520 is configured to determine a target rotational speed of the bubble suction pump motor according to a liquid level of the alkaline liquid tank and a load condition of the bubble suction pump motor when the automatic control starting condition is met; the adjusting module 530 is configured to adjust the pressure in the defoaming box according to the target rotation speed of the foam suction pump motor and the opening of a flap valve of the defoaming box, so as to eliminate foam.
As a possible implementation manner of the embodiment of the present disclosure, the determining module 520 includes: a first determination unit and a second determination unit; the first determining unit is used for determining the set rotating speed of the bubble suction pump motor under the liquid level height of the alkali liquid tank according to the liquid level height of the alkali liquid tank, the limit liquid level height and the set liquid level height; and the second determining unit is used for determining the target rotating speed of the bubble suction pump motor according to the load condition of the bubble suction pump motor and the set rotating speed of the bubble suction pump motor under the liquid level height of the alkaline liquid tank.
As a possible implementation manner of the embodiment of the present disclosure, the first determining unit is specifically configured to, when the liquid level height of the lye tank is greater than or equal to the limit liquid level height, compare the liquid level height of the lye tank with the set liquid level height; wherein the limit level height is less than the set level height; and when the liquid level height of the alkaline liquid tank is greater than or equal to the set liquid level height, determining that the set rotating speed of the bubble suction pump motor is a first rotating speed under the liquid level height of the alkaline liquid tank.
As a possible implementation manner of the embodiment of the present disclosure, the first determining unit is further specifically configured to determine that the set rotation speed of the bubble suction pump motor is a second rotation speed at the liquid level height of the lye tank when the liquid level height of the lye tank is less than the limit liquid level height.
As a possible implementation manner of the embodiment of the present disclosure, the first determining unit is specifically further configured to determine that the set rotation speed of the bubble suction pump motor is a third rotation speed at the liquid level height of the lye tank when the liquid level height of the lye tank is greater than or equal to the limit liquid level height and the liquid level height of the lye tank is less than the set liquid level height.
As a possible implementation manner of the embodiment of the present disclosure, the second determining unit is specifically configured to, when the bubble suction pump motor is in an overload state, perform reduction processing on a set rotation speed of the bubble suction pump motor at a liquid level height of the alkaline solution tank, to obtain a processed rotation speed of the bubble suction pump motor; under the processed rotating speed, if the bubble suction pump motor is still in an overload state, adjusting the opening degree of a pneumatic adjusting valve for connecting the lye tank and the bubble suction pump until the bubble suction pump motor is in a non-overload state; and taking the processed rotating speed as the target rotating speed of the bubble suction pump motor.
As a possible implementation manner of the embodiment of the present disclosure, the apparatus further includes: the system comprises a first control module, a second control module and a third control module; the first control module is used for controlling two pneumatic liquid discharge pumps connected with the defoaming box to operate for a preset time when the liquid level in the defoaming box is greater than a first liquid level threshold value; the second control module is used for controlling one of the two pneumatic liquid discharge pumps to operate for the preset time when the liquid level in the defoaming box is smaller than the first liquid level threshold and larger than a second liquid level threshold; and the third control module is used for controlling the two pneumatic liquid discharge pumps not to operate when the liquid level in the defoaming box is less than the second liquid level threshold value.
It should be noted that the above explanation of the embodiment of the mechanical defoaming process control method for degreasing and cleaning is also applicable to the mechanical defoaming process control device for degreasing and cleaning in this embodiment, and is not repeated herein.
In the embodiment of the disclosure, whether the automatic control starting condition is met is judged; when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor; according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box, the pressure in the defoaming box is adjusted to eliminate foam, so that the defoaming rate is improved and the surface cleaning quality of the strip steel is improved by controlling the negative pressure stability of the defoaming box.
The present disclosure also provides a computer device, a readable storage medium, and a computer program product according to embodiments of the present disclosure.
In order to implement the foregoing embodiments, the present disclosure further provides a computer program product, which when executed by an instruction processor in the computer program product, executes the method for controlling the defoaming process of the degreasing cleaning machine according to the foregoing embodiments of the present disclosure.
FIG. 6 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure. The computer device 12 shown in fig. 6 is only one example and should not bring any limitations to the functionality or scope of use of the embodiments of the present disclosure.
As shown in FIG. 6, computer device 12 is in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
Although not shown in FIG. 6, a disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a Compact disk Read Only Memory (CD-ROM), a Digital versatile disk Read Only Memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the disclosure.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally perform the functions and/or methodologies of the embodiments described in this disclosure.
The processing unit 16 executes various functional applications, such as implementing the degreasing cleaning mechanical defoaming process control method mentioned in the foregoing embodiments, by executing a program stored in the system memory 28.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried out in the method of implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing module, or each unit may exist separately and physically. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. A method for controlling a defoaming process of a degreasing cleaning machine is characterized by comprising the following steps:
judging whether the automatic control starting condition is met;
when the automatic control starting condition is met, determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor;
and adjusting the pressure in the defoaming box according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box so as to eliminate foam.
2. The method of claim 1, wherein determining the target rotation speed of the bubble suction pump motor according to the liquid level of the lye tank and the load condition of the bubble suction pump motor comprises:
determining the set rotating speed of the bubble suction pump motor under the liquid level height of the alkaline liquid tank according to the liquid level height of the alkaline liquid tank, the limit liquid level height and the set liquid level height;
and determining the target rotating speed of the bubble suction pump motor according to the load condition of the bubble suction pump motor and the set rotating speed of the bubble suction pump motor under the liquid level height of the alkaline liquid tank.
3. The method of claim 2, wherein determining the set rotational speed of the blister pump motor at the level height of the caustic tank based on the level height of the caustic tank, a limit level height, and a set level height comprises:
when the liquid level height of the alkaline liquid tank is greater than or equal to the limit liquid level height, comparing the liquid level height of the alkaline liquid tank with the set liquid level height; wherein the limit level height is less than the set level height;
and when the liquid level height of the alkaline liquid tank is greater than or equal to the set liquid level height, determining that the set rotating speed of the bubble suction pump motor is a first rotating speed under the liquid level height of the alkaline liquid tank.
4. The method of claim 2, wherein determining the set rotational speed of the bubble suction pump motor at the liquid level height of the lye tank as a function of the liquid level height of the lye tank, the threshold liquid level height and the set liquid level height comprises:
and when the liquid level height of the alkaline liquid tank is smaller than the limit liquid level height, determining that the set rotating speed of the bubble suction pump motor is a second rotating speed under the liquid level height of the alkaline liquid tank.
5. The method of claim 2, wherein determining the set rotational speed of the blister pump motor at the level height of the caustic tank based on the level height of the caustic tank, a limit level height, and a set level height comprises:
and when the liquid level height of the alkaline liquid tank is greater than or equal to the limit liquid level height and the liquid level height of the alkaline liquid tank is less than the set liquid level height, determining that the set rotating speed of the bubble suction pump motor is the third rotating speed under the liquid level height of the alkaline liquid tank.
6. The method of claim 2, wherein the determining the target rotation speed of the bubble suction pump motor according to the load condition of the bubble suction pump motor and the set rotation speed of the bubble suction pump motor at the liquid level height of the lye tank comprises:
when the bubble suction pump motor is in an overload state, the set rotating speed of the bubble suction pump motor under the liquid level height of the alkali liquor tank is reduced to obtain the processed rotating speed of the bubble suction pump motor;
at the processed rotating speed, if the bubble suction pump motor is still in an overload state, adjusting the opening of a pneumatic adjusting valve connecting the lye tank and the bubble suction pump until the bubble suction pump motor is in a non-overload state;
and taking the processed rotating speed as the target rotating speed of the bubble suction pump motor.
7. The method of claim 1, further comprising:
when the liquid level in the defoaming box is greater than a first liquid level threshold value, controlling two pneumatic liquid discharge pumps connected with the defoaming box to operate for a preset time;
when the liquid level in the defoaming box is smaller than the first liquid level threshold and larger than a second liquid level threshold, controlling one of the two pneumatic liquid discharge pumps to operate for the preset time;
and when the liquid level in the defoaming box is smaller than the second liquid level threshold value, controlling the two pneumatic liquid discharge pumps not to operate.
8. A mechanical defoaming system for degreasing and cleaning, comprising: the device comprises a controller, an alkaline liquid tank, a bubble suction pump connected with the alkaline liquid tank, a rotary defoaming column connected with the bubble suction pump, and a defoaming tank;
the top of the lye tank is provided with a foam outlet, the foam outlet is connected with an inlet of the foam suction pump through a foam suction pipe, and the foam suction pipe is provided with a pneumatic regulating valve;
the outlet of the foam sucking pump is connected with the inlet of a rotary defoaming column, the outlet of the rotary defoaming column is connected with the defoaming box, and a helical blade is arranged in the rotary defoaming column;
the top of the defoaming box is provided with a gas phase outlet which is connected with the lye tank through an exhaust pump; the bottom of the defoaming box is provided with a liquid phase outlet which is connected with the alkaline liquid box through a pneumatic liquid discharge pump;
the defoaming box is internally provided with a flap valve driven by a stepping motor;
wherein the controller is respectively connected with the lye tank, the foam-absorbing pump, the rotary foam-removing column and the foam-removing tank and is used for executing the degreasing cleaning mechanical foam-removing process control method as defined in any one of claims 1 to 7.
9. The utility model provides a degreasing and cleaning machinery defoaming process control device which characterized in that includes:
the judging module is used for judging whether the automatic control starting condition is met or not;
the determining module is used for determining the target rotating speed of the bubble suction pump motor according to the liquid level height of the alkaline liquid tank and the load condition of the bubble suction pump motor when the automatic control starting condition is met;
and the adjusting module is used for adjusting the pressure in the defoaming box according to the target rotating speed of the foam suction pump motor and the opening degree of a flap valve of the defoaming box so as to eliminate foam.
10. The apparatus of claim 9, further comprising: the system comprises a first control module, a second control module and a third control module;
the first control module is used for controlling two pneumatic liquid discharge pumps connected with the defoaming box to operate for a preset time when the liquid level in the defoaming box is greater than a first liquid level threshold value;
the second control module is used for controlling one of the two pneumatic liquid discharge pumps to operate for the preset time when the liquid level in the defoaming box is smaller than the first liquid level threshold and larger than a second liquid level threshold;
and the third control module is used for controlling the two pneumatic liquid discharge pumps not to operate when the liquid level in the defoaming box is less than the second liquid level threshold value.
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| CN202210179792.8A CN114574869B (en) | 2022-02-25 | 2022-02-25 | Defoaming process control method, device and system for degreasing cleaning machine |
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| CN202210179792.8A CN114574869B (en) | 2022-02-25 | 2022-02-25 | Defoaming process control method, device and system for degreasing cleaning machine |
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| KR100725324B1 (en) * | 2005-12-23 | 2007-06-07 | 주식회사 포스코 | Apparatus for foam removal in alkaline cleaning process of metal strip and its method |
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