TWI827478B - Clean system and clean method for a steel strip - Google Patents

Abstract

A clean system and a clean method for a steel strip are provided. The clean system includes: plural water sinks connected serially via pipes, a transporting device, a chloride ion detector for a first one of the water sinks, a chloride ion detector for a last one of the water sinks, a wringer roll device, a water supplying device and a computer device. The clean method uses the water sinks, the transporting device, the chloride ion detectors, the wringer roll device and the water supplying device to clean the steel strip, in which the computer device calculates a supplied water amount in accordance with the concentrates measured by the chloride ion detectors, the thickness of the steel strip, the width of the steel strip, a compensating reference value of wringer roll and a cleaning speed for the steel strip, and performs water supply to the last one of the water sinks in accordance with the supplied water amount.

Description

Steel belt cleaning system and steel belt cleaning method

The present invention relates to a steel strip cleaning system and a steel strip cleaning method, in particular to a cleaning system and a steel strip cleaning method for pickled steel strips.

The pickling process is an important process for producing cold-rolled steel strips. Generally speaking, the pickling process is used to treat the iron oxide scale on the steel strip to make the surface of the steel strip suitable for cold rolling. After the pickling process, the steel strip needs to be cleaned to remove the acid on the steel strip.

The current pickling solution cleaning process usually uses a plurality of cleaning tanks connected in series. For example, when the steel strip is conveyed through these cleaning tanks, the steel strip is flushed (eg, a spray pickling cleaning tank) with water in these cleaning tanks to remove acid from the steel strip. When these cleaning tanks are replenished, the water systems in these cleaning tanks are replenished in a cascade manner. Specifically, water enters the replenishment tank from the last wash tank, then overflows to the second last wash tank, and then overflows to the third last wash tank. In this way, the overflow continues until the first cleaning tank.

However, the current steel belt cleaning mechanism still often suffers from insufficient or excessive water replenishment, so a new steel belt cleaning system and steel belt cleaning method are needed to solve the above problems.

The invention provides a steel belt cleaning system and a steel belt cleaning method, which can accurately calculate the amount of water replenishment to avoid the problem of insufficient or excessive water replenishment.

According to an embodiment of the present invention, the above-mentioned steel belt cleaning system includes: a plurality of cleaning tanks, a conveying device, a first cleaning tank chloride ion concentration detector, a final cleaning tank chloride ion concentration detector, a wringing roller device, Hydration device and computer device. The cleaning tank is filled with cleaning water, and a plurality of water pipes are connected between the cleaning tanks to connect these cleaning tanks in series. The conveying device is arranged on the cleaning tank, wherein the conveying device is used to transport the steel belt through the cleaning tank according to a steel belt cleaning speed, so as to use the cleaning water in the cleaning tank to clean the steel strip. The first cleaning tank chloride ion concentration detector is installed in the first one of the above-mentioned cleaning tanks to measure the chloride ion concentration value of the first one of the above-mentioned cleaning tanks. The last cleaning tank chloride ion concentration detector is installed in the last one of the above-mentioned cleaning tanks to measure the chloride ion concentration value of the last one of the above-mentioned cleaning tanks. The wringing roller device is arranged between the last one and the second last one of the above-mentioned cleaning tanks to perform a wringing step on the steel strip before the steel strip enters the last one of the cleaning tanks. The water replenishing device is used to provide clean water to the last one of the above-mentioned cleaning tanks. The computer device is electrically connected to the water replenishing device, the chloride ion concentration detector of the first cleaning tank and the chloride ion concentration detector of the last cleaning tank, and performs the following steps: obtaining the chloride ion concentration of the first cleaning tank and the chloride ion concentration of the last cleaning tank; Obtain a steel strip thickness value and a steel strip width value; obtain the value of the steel belt cleaning speed; obtain the value of the wringing roller compensation parameter of the wringing roller device; perform the water replenishment amount calculation step to calculate the water replenishment amount according to the first cleaning The chloride ion concentration of the tank, the chloride ion concentration of the final cleaning tank, the steel strip thickness value, the steel strip width value, the value of the wringing roller compensation parameter and the value of the steel strip cleaning speed are used to calculate the water replenishment amount; and a replenishment water is generated according to the water replenishment amount. signal, and output the water replenishing signal to the water replenishing device to control the water replenishing device to provide clean water to the last one of the above-mentioned cleaning tanks.

In some embodiments, the water replenishment amount calculation step is to calculate the water replenishment amount according to the following equation: Q ₄ =(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref where Q ₄ is the above water replenishment amount ; Q _CSP is a speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is a first cleaning tank water replenishment amount calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is a water replenishment amount based on the last cleaning tank chlorine The final cleaning tank water replenishment amount is calculated based on the ion concentration; Q _TH is the thickness-related water replenishment amount calculated based on the steel strip thickness value; Q _WD is the width-related water replenishment amount calculated based on the steel strip width value; R _ref is the value of the compensation parameter of the wringing roller.

In some embodiments, the above-mentioned steel belt cleaning system further includes a water spray device. The water spray device is used to spray water on the steel strip when the steel strip leaves the last one of the above-mentioned cleaning tanks.

In some embodiments, the above-mentioned water spray device sprays water on the steel strip according to a water spray amount, and the above-mentioned water replenishment amount calculation step calculates the water replenishment amount according to the following equation: Q ₄ = Q _C +(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water replenishment amount; Q _C is the water spray amount of the water spray device; Q _CSP is the speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is the water replenishment amount calculated based on the steel strip cleaning speed. The water replenishment amount of the first cleaning tank is calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is the water replenishment amount of the last cleaning tank calculated based on the chloride ion concentration of the last cleaning tank; Q _TH is the water replenishment amount of the last cleaning tank calculated based on the thickness of the steel strip is the thickness-related water replenishment amount; Q _WD is the width-related water replenishment amount calculated based on the steel strip width value; R _ref is the value of the wringing roller compensation parameter.

In some embodiments, the value of the wringing roller compensation parameter is calculated based on the dry friction coefficient of the wringing roller device.

According to an embodiment of the present invention, the above-mentioned steel belt cleaning method is applicable to the above-mentioned steel belt cleaning system, and is executed by the above-mentioned steel belt cleaning system. The steel belt cleaning method includes: providing a plurality of cleaning tanks, wherein these cleaning tanks are filled with cleaning water, and a plurality of water pipes are connected between the cleaning tanks to connect the cleaning tanks in series; using a conveying device to transport a steel belt according to the cleaning speed of the steel belt. Steel strip, so that the steel strip passes through the above-mentioned cleaning tank, and the cleaning water in the cleaning tank is used to clean the steel strip; the first cleaning tank chloride ion concentration detector is used to measure the first one of the above-mentioned cleaning tanks. A cleaning tank chloride ion concentration value; a final cleaning tank chloride ion concentration detector is used to measure the chloride ion concentration value of the first one of the above-mentioned cleaning tanks, the final cleaning tank; a wringing roller device is used to perform the steel strip A wringing step, wherein the wringing roller device is arranged between the last one and the second last one of the above-mentioned cleaning tanks; a step of calculating the amount of water replenishment is performed to calculate the chloride ion concentration in the first cleaning tank and the chloride ion concentration in the last cleaning tank. The concentration, steel strip thickness value, steel strip width value, the value of a compensation parameter of the wringing roller device and the value of the steel belt cleaning speed are used to calculate a water replenishment amount; and a water replenishment signal is generated based on this water replenishment amount, and the water is The signal is output to a water replenishing device to control the water replenishing device to provide clean water to the last one of the above-mentioned cleaning tanks.

In some embodiments, the water replenishment amount calculation step in the above steel strip cleaning method is to calculate the water replenishment amount according to the following equation: Q ₄ =(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref where, Q ₄ is the above-mentioned water replenishment amount; Q _CSP is a speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is a first cleaning tank replenishment amount calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is the water replenishment amount of the final cleaning tank calculated based on the chloride ion concentration of the final cleaning tank; Q _TH is the thickness-related water replenishment amount calculated based on the steel strip thickness value; Q _WD is the water replenishment amount calculated based on the steel strip width value. A width-related water replenishment amount; R _ref is the value of the wringing roller compensation parameter.

In some embodiments, the above-mentioned steel strip cleaning method further includes: when the steel strip leaves the last one of the above-mentioned cleaning tanks, using a water spray device to spray water on the steel strip.

In some embodiments, the above-mentioned water spray device sprays water on the steel strip according to a water spray amount, and the above-mentioned water replenishment amount calculation step calculates the water replenishment amount according to the following equation: Q ₄ = Q _C +(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water replenishment amount; Q _C is the water spray amount of the water spray device; Q _CSP is the speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is the water replenishment amount calculated based on the steel strip cleaning speed. The water replenishment amount of the first cleaning tank is calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is the water replenishment amount of the last cleaning tank calculated based on the chloride ion concentration of the last cleaning tank; Q _TH is the water replenishment amount of the last cleaning tank calculated based on the thickness of the steel strip is the thickness-related water replenishment amount; Q _WD is the width-related water replenishment amount calculated based on the steel strip width value; R _ref is the value of the wringing roller compensation parameter.

In some embodiments, the value of the wringing roller compensation parameter is calculated based on the dry friction coefficient of the wringing roller device.

Examples of the present invention will be described below. It is to be appreciated, however, that the embodiments provide many applicable concepts that can be embodied in a wide variety of specific contexts. The embodiments discussed and disclosed are for illustration only and are not intended to limit the scope of the invention.

Please refer to FIGS. 1 and 2 simultaneously. FIG. 1 is a top view of a steel strip 100 according to an embodiment of the present invention, and FIG. 2 is a schematic structural diagram of a steel strip cleaning system 200 according to an embodiment of the present invention. The steel strip cleaning system 200 is suitable for cleaning the steel strip 100, where the steel strip 100 has been processed by the pickling process and has acid residue. The steel belt cleaning system 200 includes a plurality of cleaning tanks 211 to 214, a conveying device 220, a first cleaning tank chloride ion concentration detector 230, a final cleaning tank chloride ion concentration detector 240, a wringing roller device 250, and a water replenishing device 260 and computer device 270. In this embodiment, the steel strip cleaning system 200 includes four cleaning tanks 211 to 214. The four cleaning tanks 211 to 214 are connected in series with a plurality of water pipes to achieve a gradient control (cascade) water replenishment function. The cleaning tanks 211 to 214 are filled with water for cleaning. In this embodiment, the cleaning water is deionized water, but the embodiment of the present invention is not limited thereto.

As shown in Figure 1, the conveying device 220 is used to convey the steel belt 100 into the steel belt cleaning system 200 to clean the steel belt 100. The conveying device 220 conveys the steel belt 100 according to the cleaning speed set by the program-controlled computer. In other words, the conveying speed of the conveying device 220 is the cleaning speed of the steel strip. In this embodiment, the conveying device 220 is a plurality of conveying rollers, but the embodiment of the present invention is not limited thereto.

When the conveying device 220 transports the steel belt 100 into the steel belt cleaning system 200, the steel belt 100 will first pass through the first of the above-mentioned cleaning tanks, that is, the cleaning tank 211, so that the water in the cleaning tank 211 is used to clean the steel belt 100. Then, it passes through the cleaning tanks 212 and 213 in sequence to use the cleaning tanks 212 and 213 for cleaning. Then, the steel strip 100 is cleaned by using the water in the cleaning tank 211 through the last one of the above-mentioned cleaning tanks, that is, the cleaning tank 214 . In this embodiment, four cleaning tanks 211 to 214 are used to clean the steel strip 100 in four stages. However, the embodiment of the present invention is not limited to the use of four cleaning tanks.

When the water in the cleaning tank 211 is used to clean the steel strip 100, the acid liquid on the steel strip 100 will be washed back into the cleaning tank 211, so that the concentration of the acid liquid in the cleaning tank 211 will increase. Similarly, when the water in the cleaning tank 212 is used to clean the steel strip 100, the acid on the steel strip will be washed back into the cleaning tank 212, so that the concentration of the acid in the cleaning tank 212 will increase; when the cleaning tank is used 213 of water is used to clean the steel strip 100, the acid on the steel strip 100 will be washed back into the cleaning tank 213, so that the concentration of the acid in the cleaning tank 213 will increase; when the water in the cleaning tank 214 is used to clean the steel strip When the belt 100 is cleaned, the acid on the steel belt will be washed back into the cleaning tank 214, so that the concentration of the acid in the cleaning tank 214 will increase. Since the steel strip 100 is cleaned sequentially by the cleaning tanks 211, 212, 213 and 214, the acid concentration of the cleaning tank 211 will be greater than that of the cleaning tank 212, and the acid concentration of the cleaning tank 212 will be greater than that of the cleaning tank 213. The acid concentration of the cleaning tank 213 will be greater than the acid concentration of the cleaning tank 214 .

When the acid concentration in the cleaning tank is too high, the cleaning effect of the steel strip cleaning system 200 will be reduced, so the cleaning tanks 211 to 214 need to be replenished. For example, clean water is replenished to the cleaning tank 214, and then the cleaning tank 211~213 is replenished through the above gradient control method.

Considering that traditional pH meters (PH meters) are easily affected by the cleaning tank environment and have measurement inaccuracies, and the factor that has a greater impact on the steel strip manufacturing process is the chloride ion concentration, the embodiment of the present invention uses a chloride ion concentration detection meter. Replace traditional pH meter. The chloride ion concentration detector uses conductivity testing to obtain the chloride ion concentration in the cleaning tank. Since the pickling process uses hydrochloric acid (HCl) for pickling, the chloride ion concentration in the cleaning tank can also represent the acid concentration in the cleaning tank. In this embodiment, a first cleaning tank chloride ion concentration detector 230 and a last cleaning tank chloride ion concentration detector 240 are provided for the first cleaning tank 211 and the last cleaning tank 214 to respectively measure the first cleaning tank 211 and the last cleaning tank 214 . The chloride ion concentration of the first cleaning tank 211 and the last cleaning tank 214 is determined according to the preset chloride ion concentration threshold value whether the acid concentration in the cleaning tank is too high. In the embodiment of the present invention, when the concentration of the first cleaning tank 211 is greater than 1600 ppm and/or the chloride ion concentration of the last cleaning tank 214 is greater than 0 ppm, water replenishment will begin. However, embodiments of the present invention are not limited thereto. Users can adjust the chloride ion concentration threshold according to actual needs.

In some embodiments, in order to prevent the acid water from the first three cleaning tanks 211 to 213 from remaining on the steel belt 100, a wringing roller device 250 is provided between the last cleaning tank 214 and the second last cleaning tank 213. Before the steel strip 100 enters the last cleaning tank 214, the residual acid water on the steel strip 100 is dried. The wringing roller device 250 may include at least one pair of wringing rollers. In this embodiment, the wringing roller device 250 includes two pairs of wringing rollers, but the embodiment of the present invention is not limited thereto. In addition, in some embodiments, in order to prevent the acid water between the water tanks from interacting with each other, wringing rollers may also be provided between the water tanks.

In FIG. 2 , the computer device 270 is used to calculate the water replenishment amount and control the water replenishment device 260 to replenish the cleaning tank 214 . In some embodiments, the computer device 270 may be a programmable computer, which is used to control each component in the steel strip cleaning system 200 to clean the steel strip 100 . In some embodiments, the computer device 270 can be independently programmed to perform the water replenishment amount calculation step and control the water replenishment device 260 to replenish the cleaning tank 214 .

The computer device 270 can obtain the chloride ion concentration of the first cleaning tank (obtained from the chloride ion concentration detector 230 of the first cleaning tank), the chloride ion concentration of the last cleaning tank (obtained from the chloride ion concentration detector 240 of the last cleaning tank), the steel The steel strip thickness value and steel strip width value of the belt 100 (provided by the program-controlled computer), the steel belt cleaning speed of the steel belt 100 (provided by the program-controlled computer) and the compensation parameters of the wringing roller device 250 (provided by the program-controlled computer). Then, based on the above-mentioned chloride ion concentration of the first cleaning tank, the chloride ion concentration of the last cleaning tank, the steel strip thickness value, the steel strip width value, the value of the wringing roller compensation parameter and the value of the steel strip cleaning speed (the unit is per minute meters (m/hr) to calculate the water replenishment amount. Then, a water replenishment signal is output to the water replenishment device 260 according to the calculated water replenishment amount to control the water replenishment device to provide clean water to the cleaning tank 214. In some embodiments, The computer device 270 will first determine whether the acid concentration in the cleaning tank is too high, and then output a water replenishment signal to the water replenishment device 260 .

The water replenishing device 260 includes a flow control device 261 and a valve 262. The flow control device 261 is a signal processor that can receive the water replenishment signal provided by the computer device 270 and control the valve 262 accordingly to provide clean water to the cleaning tank 214.

In some embodiments, the computer device 270 calculates the hydration amount according to the following equation: Q ₄ =(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref (1) Where, Q ₄ is the computer The water replenishment amount calculated by the device 270 is in cubic meters per hour (m ³ /hr); Q _CSP is the speed-related water replenishment amount calculated based on the steel belt cleaning speed, and the unit is cubic meters per hour (m ³ /hr). hr); Q _CL1 is the water replenishment volume of the first cleaning tank calculated based on the chloride ion concentration of the first cleaning tank, in cubic meters per hour (m ³ /hr); Q _CL4 is the water replenishment volume of the first cleaning tank calculated based on the chloride ion concentration of the last cleaning tank. The calculated final water replenishment volume of the cleaning tank, in cubic meters per hour (m ³ /hr); Q _TH is the water replenishment volume related to the thickness of the steel strip, in cubic meters per hour (m ³ /hr); Q _WD is the water replenishment amount related to the steel strip width calculated based on the steel strip width value, the unit is cubic meters per hour (m ³ /hr); R _ref is the value of the wringing roller compensation parameter, which is determined by the wringing roller device 250 Determined by opening and/or programmable parameters.

Please refer to Figures 3 to 7 at the same time, which illustrate water replenishment parameters and steel strip cleaning speed, chloride ion concentration in the first cleaning tank, chloride ion concentration in the last cleaning tank, steel strip thickness value and steel strip width value according to the embodiment of the present invention. The relationship curve, in which the water replenishment parameter is the parameter of the water replenishment amount. In the embodiment of the present invention, the above-mentioned water replenishment amounts Q _CSP , Q _CL1 , Q _CL4 , Q _TH , and Q _WD are calculated according to the preset water replenishment curve relationship. For example, as shown in Figure 3, the water replenishment amount Q _CSP 's water replenishment parameter increases with the increase of the steel strip cleaning speed. For another example, as shown in Figure 4, when the chloride ion concentration in the first cleaning tank exceeds the threshold, the water replenishment parameter Q _CL1 increases rapidly with the chloride ion concentration in the first cleaning tank. For another example, as shown in Figure 5, when the chloride ion concentration in the last cleaning tank exceeds the threshold, the water replenishment parameter Q _CL4 increases rapidly with the chloride ion concentration in the last cleaning tank. When the value of the chloride ion concentration in the last cleaning tank When it is close to 1ppm, the rising speed of hydration parameters will decrease. For another example, as shown in Figure 6, when the steel strip thickness exceeds the preset thickness threshold (for example, 1500), the water replenishment parameter Q _TH decreases as the steel strip thickness increases. For another example, as shown in Figure 7, when the steel strip width value exceeds the preset width threshold (for example, 15000), the water replenishment parameter _QWD increases as the steel strip width value increases. It is worth mentioning that during the cleaning process of the steel strip, the width and thickness of the steel strip are fixed, and the cleaning speed of the steel strip is also roughly fixed.

Please return to Figure 2. A wringing roller and a water spray device 280 are provided at the outlet of the steel belt cleaning system 200. The wringing roller at the exit is used to prevent the steel strip 100 output by the steel strip cleaning system 200 from containing excessive moisture, which will affect the back-end process. However, the wringing roller may wring the steel strip 100 too dry and cause dry friction, causing defects in the steel strip 100 . In order to prevent dry friction, the steel strip cleaning system 200 is provided with a water spray device 280 to spray water on the steel strip 100 to prevent the steel strip 100 from being too dry. The water spray volume of the water spray device 280 is also calculated and provided by the computer device 270 . In this way, the above formula (1) can be rewritten as the following formula: Q ₄ =Q _C +(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref (2) Among them, Q _C is the water spray device 280 The amount of water spray provided.

Please refer to FIG. 8 , which is a schematic flow chart of a steel strip cleaning method 800 according to an embodiment of the present invention. The steel belt cleaning method 800 is suitable for the steel belt cleaning system 200 mentioned above. In the steel strip cleaning method 800, step 810 is first performed to provide the above-mentioned cleaning tanks 211~214. Then, step 820 is performed to use the conveying device 220 to transport the steel belt 100 according to the preset steel belt cleaning speed, so that the steel belt 100 passes through the cleaning tanks 211 to 214, and is cleaned using the cleaning water in the cleaning tanks 211 to 214. Steel strip 100. During the cleaning process, the wringing roller device 250 can be used to wring the steel strip 100 . Then, step 830 is performed to measure the chloride ion concentration value of one of the first cleaning tanks 211 by using the first cleaning tank chloride ion concentration detector 230, and using the last cleaning tank chloride ion concentration detector. 240, to measure the chloride ion concentration value of one of the last cleaning tanks 214. Then, step 840 is performed to determine the chloride ion concentration of the first cleaning tank, the chloride ion concentration of the last cleaning tank, the steel strip thickness value, the steel strip width value, the value of the compensation parameter of the wringing roller device, and the value of the steel strip cleaning speed. Calculate the amount of hydration. Next, step 850 is performed to generate a water replenishment signal according to the calculated water replenishment amount, and output the water replenishment signal to the water replenishment device 260 to control the water replenishment device 260 to provide clean water to the last cleaning tank 214 .

From the above description, it can be seen that the steel strip cleaning system 200 and the steel strip cleaning method 800 of the embodiment of the present invention adopt the chloride ion concentration of the first cleaning tank, the chloride ion concentration of the last cleaning tank, the steel strip thickness value, the steel strip width value, and the wringing roller. The compensation parameter value of the device and the steel belt cleaning speed are used to calculate the replenishing water volume of the cleaning tank. Therefore, the steel belt cleaning system 200 and the steel belt cleaning method 800 of the embodiment of the present invention can replenish the water of the cleaning tank more accurately than the previous technology, avoiding the problem of replenishing water in the cleaning tank. Problems with insufficient or excessive hydration.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

100:Steel strip 200: Steel belt cleaning system 211~214: Cleaning tank 220:Conveying device 230: Chloride ion concentration detector in the first cleaning tank 240: Chloride ion concentration detector for final cleaning tank 250: Wringing roller device 260:Hydration device 261:Flow control device 262:Valve 270:Computer device 280:Water spray device 800: Steel belt cleaning method 810~850: steps

[Fig. 1] is a top view of a steel strip according to an embodiment of the present invention. [Fig. 2] is a schematic structural diagram of a steel belt cleaning system according to an embodiment of the present invention. [Figure 3] to [Figure 7] illustrate the water replenishment parameters and steel strip cleaning speed, chloride ion concentration in the first cleaning tank, chloride ion concentration in the last cleaning tank, steel strip thickness value and steel strip width value according to the embodiment of the present invention. relationship curve. [Fig. 8] is a schematic flowchart illustrating a steel strip cleaning method according to an embodiment of the present invention.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

200: Steel belt cleaning system

211~214: Cleaning tank

230: Chloride ion concentration detector in the first cleaning tank

240: Chloride ion concentration detector for final cleaning tank

250: Wringing roller device

260:Hydration device

261:Flow control device

262:Valve

270:Computer device

280:Water spray device

Claims (10)

A steel strip cleaning system used to clean a pickled steel strip, wherein the steel strip cleaning system includes: A plurality of cleaning tanks, wherein the cleaning tanks are filled with cleaning water, and a plurality of water pipes are connected between the cleaning tanks to connect the cleaning tanks in series; A conveying device is arranged on the cleaning tanks, wherein the conveying device is used to transport the steel belt through the cleaning tanks according to a steel belt cleaning speed, so as to use the cleaning water in the cleaning tanks to clean the steel belt; A first cleaning tank chloride ion concentration detector is provided in the first one of the cleaning tanks to measure the chloride ion concentration value of the first cleaning tank in the first cleaning tank; A final cleaning tank chloride ion concentration detector is installed in the last one of the cleaning tanks to measure the chloride ion concentration value of the last cleaning tank of the cleaning tanks; A wringing roller device is disposed between the last one of the cleaning tanks and a second last one, so as to twist the steel strip before the steel strip enters the last one of the cleaning tanks. dry steps; a water supply device for providing clean water to the last of the cleaning tanks; and A computer device electrically connected to the water replenishing device, the first cleaning tank chloride ion concentration detector and the final cleaning tank chloride ion concentration detector, and performs: Obtain the chloride ion concentration of the first cleaning tank and the chloride ion concentration of the last cleaning tank; Obtain a steel strip thickness value and a steel strip width value of the steel strip; Obtain the value of the steel strip cleaning speed; Obtain the value of one of the wringing roller compensation parameters of the wringing roller device; A water replenishment amount calculation step is performed based on the chloride ion concentration of the first cleaning tank, the chloride ion concentration of the last cleaning tank, the steel strip thickness value, the steel strip width value, the value of the wringing roller compensation parameter and the steel strip The value of the cleaning speed is used to calculate the amount of water replenishment; and A water replenishment signal is generated according to the water replenishment amount, and the water replenishment signal is output to the water replenishment device to control the water replenishment device to provide clean water to the last one of the cleaning tanks. The steel belt cleaning system as described in claim 1, wherein the water replenishment amount calculation step is to calculate the water replenishment amount according to the following equation: Q ₄ =(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water replenishment amount; Q _CSP is a speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is a first cleaning tank replenishment amount calculated based on the chloride ion concentration of the first cleaning tank. Water amount; Q _CL4 is the water replenishment amount of the final cleaning tank calculated based on the chloride ion concentration of the final cleaning tank; Q _TH is the thickness-related water replenishment amount calculated based on the thickness of the steel strip; Q _WD is the water replenishment amount based on the thickness of the steel strip A width-related water replenishment amount calculated from the width value; R _ref is the value of the compensation parameter of the wringing roller. The steel belt cleaning system as described in claim 1 further includes: A water spray device is used to spray water on the steel strip when the steel strip leaves the last one of the cleaning tanks. The steel strip cleaning system as described in claim 3, wherein the water spray device sprays water on the steel strip according to a water spray amount, and the water replenishment amount calculation step calculates the water replenishment amount according to the following equation: Q ₄ = Q _C + (Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water supply volume; Q _C is the water spray volume of the water spray device; Q _CSP is calculated based on the steel strip cleaning speed A speed-related water replenishment amount is obtained; Q _CL1 is a first cleaning tank replenishment amount calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is a final cleaning calculated based on the chloride ion concentration of the last cleaning tank Tank water replenishment amount; Q _TH is a thickness-related water replenishment amount calculated based on the steel strip thickness value; Q _WD is a width-related water replenishment amount calculated based on the steel strip width value; R _ref is the compensation of the wringing roller The value of the parameter. The steel belt cleaning system of claim 1, wherein the value of the wringing roller compensation parameter is calculated based on the dry friction coefficient of the wringing roller device. A steel belt cleaning method is suitable for a steel belt cleaning system and is executed by the steel belt cleaning system, wherein the steel belt cleaning method includes: Provide a plurality of cleaning tanks, wherein the cleaning tanks are filled with cleaning water, and a plurality of water pipes are connected between the cleaning tanks to connect the cleaning tanks in series; A conveyor device is used to transport a steel strip according to a steel strip cleaning speed, so that the steel strip passes through the cleaning tanks, and the cleaning water in the cleaning tanks is used to clean the steel strip; Using a first cleaning tank chloride ion concentration detector to measure the chloride ion concentration value of the first one of the cleaning tanks; Use a final cleaning tank chloride ion concentration detector to measure the chloride ion concentration value of the first one of the cleaning tanks, the final cleaning tank; A wringing roller device is used to perform a wringing step on the steel strip, wherein the wringing roller device is disposed between the last one and a second last one of the cleaning tanks; A water replenishment amount calculation step is performed based on the chloride ion concentration of the first cleaning tank, the chloride ion concentration of the last cleaning tank, a steel strip thickness value of the steel strip, a steel strip width value of the steel strip, and the wringing roller The value of a compensation parameter of the device and the value of the steel strip cleaning speed are used to calculate a water replenishment amount; and A water replenishment signal is generated according to the water replenishment amount, and the water replenishment signal is output to a water replenishment device to control the water replenishment device to provide clean water to the last one of the cleaning tanks. The steel strip cleaning method described in claim 6, wherein the water replenishment amount calculation step is to calculate the water replenishment amount according to the following equation: Q ₄ =(Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water replenishment amount; Q _CSP is a speed-related water replenishment amount calculated based on the steel strip cleaning speed; Q _CL1 is a first cleaning tank replenishment amount calculated based on the chloride ion concentration of the first cleaning tank. Water amount; Q _CL4 is the water replenishment amount of the final cleaning tank calculated based on the chloride ion concentration of the final cleaning tank; Q _TH is the thickness-related water replenishment amount calculated based on the thickness of the steel strip; Q _WD is the water replenishment amount based on the thickness of the steel strip A width-related water replenishment amount calculated from the width value; R _ref is the value of the compensation parameter of the wringing roller. The steel belt cleaning method described in claim 6 further includes: When the steel strip leaves the last one of the cleaning tanks, a water spray device is used to spray water on the steel strip. The steel strip cleaning method described in claim 8, wherein the water spray device sprays water on the steel strip according to a water spray amount, and the water replenishment amount calculation step is to calculate the water replenishment amount according to the following equation: Q ₄ = Q _C + ( Q _CSP +Q _CL1 +Q _CL4 +Q _TH +Q _WD )*R _ref Among them, Q ₄ is the water supply volume; Q _C is the water spray volume of the water spray device; Q _CSP is calculated based on the steel strip cleaning speed A speed-related water replenishment amount; Q _CL1 is a first cleaning tank water replenishment amount calculated based on the chloride ion concentration of the first cleaning tank; Q _CL4 is a final cleaning tank calculated based on the chloride ion concentration of the last cleaning tank Water replenishment amount; Q _TH is a thickness-related water replenishment amount calculated based on the steel strip thickness value; Q _WD is a width-related water replenishment amount calculated based on the steel strip width value; R _ref is the compensation parameter of the wringing roller value. The steel belt cleaning method of claim 6, wherein the value of the wringing roller compensation parameter is calculated based on the dry friction coefficient of the wringing roller device.

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