TWI765440B - Burner control method - Google Patents

Abstract

The present invention provides a burner control method, which firstly obtains the parameter values corresponding to a plurality of burners, then obtains the fuel consumption corresponding to the parameter values, and calculates a first comparable energy consumption according to the obtained parameter values, resulting in different and perform a curve fitting operation on them to calculate a second comparable energy consumption, calculate a plurality of error values between the first comparable energy consumption and the second comparable energy consumption, and obtain a The second equation is to randomly generate a plurality of parameter values of the second quantity, and respectively calculate the parameter values of the second quantity according to the second equation, and perform an iterative operation to generate a plurality of parameter values of the third quantity. The third quantity parameter values control the operation of the burners.

Description

Burner control method

The present invention relates to a control method of a burner, especially a control method of a burner used in a regenerative combustion furnace.

An industrial furnace is a thermal equipment that uses the heat of fuel combustion or electrical energy conversion to heat materials or workpieces in industrial production. It is usually equipped with multiple burners in the furnace body, and the burners are industrial furnaces that use fuel as a heat source. Inside, the device used to realize the fuel combustion process.

When the conventional combustion furnace is rapidly heated, a large amount of fuel is required to supply the burner to generate a corresponding large amount of heat energy, which leads to a rapid increase in the amount of high-temperature exhaust gas generated by the conventional combustion furnace. Therefore, the conventional combustion furnace needs to quickly discharge the high-temperature exhaust gas. In order to maintain the furnace pressure in the traditional combustion furnace, the conventional burner design will lead to a large amount of heat energy in the traditional combustion furnace. , more fuel supply is required to maintain the temperature of the conventional combustion furnace, which will cause energy consumption, thereby delaying the heating speed of the conventional combustion furnace.

The fuel used by the burner as an energy source has the following characteristics. First, the fuel resource is limited, and the fuel will be exhausted one day.

The second point is that the use of fuel is not repeatable, and the use of fuel is unidirectional and irreversible.

The third point is that the use efficiency of energy is relatively low, and fuel is often lost to a certain extent during the use process. The degree of loss will vary according to the way of use and the control mode.

Fourth, the use of fuels will have a negative impact on the environment, and wastes will often be generated during the use of fuels, which will pollute the environment to varying degrees.

Therefore, in the conventional burner technology, we can only burn the fuel of the burner as much as possible to avoid waste of resources. However, with the advancement of technology, the awareness of environmental protection is rising, how to improve the combustion system of the burner. Efficiency has become a key area of related industry development and research.

In order to improve the combustion efficiency of the combustion furnace, the industry has designed a combustion furnace using regenerative combustion technology, which uses ceramic materials as a heat exchange medium, absorbs the heat energy of the high-temperature exhaust gas after combustion, and combines the air required for preheating combustion. With the advantages of high heat storage capacity of ceramic materials, the combustion air can be preheated to more than 80% of the exhaust gas temperature, thereby expanding the stable area of the flame of the regenerative combustion furnace to improve the flame stability of the regenerative combustion furnace.

The combustion furnace of regenerative combustion technology is equipped with multiple regenerative burners. The regenerative burner is mainly composed of a burner, a regenerative body and a switching valve. A group of regenerative burners must have two burners to switch and burn each other, that is, an alternate combustion method, and the regenerative burner itself has an exhaust channel.

The regenerative burner adopts an alternate combustion method. This alternate combustion method can promote a more uniform heat flow field in the furnace of the regenerative burner, and further improve the average heat flux in the furnace of the regenerative burner to achieve high efficiency. the purpose of heat transfer.

When the regenerative burner is used as an alternate combustion, its operation is as follows: when the first burner burns, the second burner acts as a discharge channel for high-temperature exhaust gas, and stores the heat energy in the high-temperature exhaust gas in the second burner. In the burner, and in the next switching operation, when the second burner starts to operate and burn, the heat energy in the second burner is taken out by the air as a combustion part. At this time, the first burner is the discharge channel of the high-temperature exhaust gas, and the heat energy in the high-temperature exhaust gas is recovered in the first burner.

Since the regenerative burner can preheat the combustion air to a relatively high temperature, the air-fuel ratio of the combustion air is lower than that of the conventional combustion furnace, which can effectively reduce the cost of exhaust gas. The heat loss caused by the regenerative burner is also due to the high temperature of the preheated air of the regenerative burner, so the fuel with low calorific value can be used correspondingly to reduce the unstable phenomenon during combustion.

Regenerative burners have been used in many related industrial production processes. Its advantage is that the heat recovery efficiency is higher than that of conventional combustion furnaces. It is an advantageous recovery and energy-saving technology. Different from the conventional combustion furnace, it can further improve the heating performance in the combustion furnace and the quality of its products.

However, when the regenerative burner controls the temperature, due to the different configuration of the burner of each burner, its volume is also different. If the same burner control mode and method are used, the combustion efficiency of the burner will be reduced, resulting in unnecessary Therefore, the industry is gradually looking for a burner control method that can correspond to different burners in the direction of burner control mode.

In view of the above-mentioned problems of the prior art, the present invention provides a control method of a burner, which obtains a preset quantity parameter value of a corresponding burner, calculates the comparable energy consumption correspondingly, generates a plurality of quantity parameter values, and calculates the corresponding quantity parameter values. Perform curve fitting operation, calculate the comparable energy consumption, and calculate the error value of the two comparable energy consumptions, obtain the best equation, calculate another parameter value with the best equation, and perform the iterative operation to generate another parameter value. , and control the operation of the burner according to the last obtained quantity parameter value, so as to find the best burner control mode.

One object of the present invention is to provide a burner control method, which obtains a preset parameter value of a corresponding burner, calculates a first comparable energy consumption according to the obtained preset parameter value, and then generates a plurality of first quantitative parameter values , and perform a curve fitting operation on it to calculate the second comparable energy consumption, obtain the second equation with the error value between the first comparable energy consumption and the second comparable energy consumption, and use the second equation to calculate the second quantity parameter value, And iterative operation is performed to generate a third quantity parameter value, and finally the operation of the burner is controlled according to the third quantity parameter value, so as to obtain the best burner control mode.

In order to achieve the above-mentioned objects and effects, the present invention provides a burner control method, the steps of which include: obtaining the quantity of a plurality of burners, obtaining a workpiece weight value and a preset quantity corresponding to the burners parameter value; obtain a fuel usage amount corresponding to the preset number of parameter values, and calculate a first comparable energy consumption of the preset number of parameter values according to the workpiece weight value and the fuel usage amount; generate the corresponding burners The plurality of first quantity parameter values are subjected to a curve fitting operation on the plurality of first quantity parameter values according to the workpiece weight value to generate a plurality of first equations, and calculate one of the first equations respectively. Two comparable energy consumptions; calculating a plurality of error values between the first comparable energy consumption and the second comparable energy consumptions of the first equations, and obtaining the smallest error values corresponding to a second equation; Randomly generate a plurality of parameter values of the second quantity corresponding to the burners, and calculate the parameter values of the second quantity according to the weight of the workpiece with the second equation, and perform an iterative operation to generate a plurality of parameter values of the second quantity three quantity parameter values; and controlling the operation of the burners according to the third quantity parameter values, wherein the third quantity parameter values respectively include a third burner switching mode and a third heat storage time , and the third burner switching mode corresponds to the switches of these burners; this method is used to control the heating modes of a plurality of burners of the burner, so as to adapt to the burner configuration of different burners.

In an embodiment of the present invention, in the steps of obtaining a workpiece weight value and obtaining a preset quantity parameter value corresponding to a plurality of burners, the first comparable energy consumption is the ratio of the fuel consumption and the workpiece weight.

In an embodiment of the present invention, the burners are arranged in a furnace body of a combustion furnace.

In an embodiment of the present invention, the preset number parameter value includes a preset burner switching mode and a preset heat storage time, and the preset burner switching mode is corresponding to the switches of the burners.

In an embodiment of the present invention, the first quantity parameter values respectively include a first burner switching mode and a first heat storage time, and the first burner switching mode is corresponding to the switches of the burners .

In an embodiment of the present invention, the second quantity parameter values respectively include a second burner switching mode and a second heat storage time, and the second burner switching mode is corresponding to the switches of the burners .

In an embodiment of the present invention, a plurality of first quantity parameter values corresponding to the burners are randomly generated, and a curve fitting operation is performed on the first quantity parameter values according to the workpiece weight value to generate a plurality of first quantity parameter values. In the step of calculating a second comparable energy consumption of each of the first equations, the curve fitting operation includes the first equations of order n, wherein n is greater than 1.

In an embodiment of the present invention, a plurality of error values of the first comparable energy consumption and the second comparable energy consumption of the first equations are calculated, and one corresponding to the minimum error values is obtained. In the step of the second equation, the error value is calculated as a root mean square error (RSME).

In an embodiment of the present invention, a plurality of second quantity parameter values corresponding to the burners are randomly generated, and the second quantity parameter values are respectively calculated according to the workpiece weight with the second equation, and a In the iterative operation, in the step of generating a plurality of third-quantity parameter values, the iterative operation includes the step of: substituting the second-quantity parameter values into the second equation respectively, and generating a plurality of third comparable energy consumptions ; Obtain the largest number of third comparable energy consumption and the smallest number of third comparable energy consumption, and generate a Comparable energy consumption range; and obtaining a fourth quantity parameter value according to the comparable energy consumption range, and replacing the second quantity parameter values corresponding to the largest third comparable energy consumptions to generate the third quantity parameter values Quantity parameter value.

In an embodiment of the present invention, an iteration number of the iterative operation is 5 to 100 times.

In an embodiment of the present invention, after the step of controlling the operation of the burners according to the parameter values of the third quantity, the step further includes the step of: obtaining one of the parameter values of the third quantity, and feeding back at the preset quantity parameter value.

10: Burner

12: Furnace body

14: Burner

16: Processor

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Figure 1: It is a schematic diagram of the steps of the embodiment of the present invention; Figure 2: It is a schematic diagram of the structure of a combustion furnace according to an embodiment of the present invention; Figure 3: It is a schematic diagram of the iterative operation steps of an embodiment of the present invention ; And Figure 4: It is a schematic flow chart of another step of an embodiment of the present invention.

In order to make your examiners have a further understanding and understanding of the features of the present invention and the effects achieved, the present invention provides a burner in view of the above-mentioned problems of the prior art. The control method, which is to obtain a preset number of parameter values corresponding to a plurality of burners, and calculate the first comparable energy consumption corresponding to the preset number of parameter values, then generate a plurality of first number of parameter values, and perform curve fitting on them. Combine operation, calculate the second comparable energy consumption, compare and calculate the error value of the first and second comparable energy consumption, obtain the first equation corresponding to the curve fitting, use the first equation to calculate the randomly obtained second quantity parameter value, and Iterative operation is performed on it to generate a third parameter value, and the operation of the burners is controlled according to the third parameter value finally obtained, and the burner is controlled with the best parameter value obtained, so as to solve the conventional burner control method , cannot be applied to the problem of different combustion furnaces.

Please refer to FIG. 1 , which is a schematic diagram of a step flow of an embodiment of the present invention. As shown in the figure, in this embodiment, a control method of a burner includes the following steps: Step S01 : obtaining the number of a plurality of burners; Step S02: Obtain the workpiece weight value and the preset quantity parameter value corresponding to the burners; Step S04: Obtain the fuel consumption corresponding to the preset quantity parameter value, and calculate the preset quantity parameter according to the workpiece weight value and the fuel consumption The first comparable energy consumption of the value; Step S06: generate a plurality of first quantity parameter values corresponding to the burners, perform a curve fitting operation on the first quantity parameter values according to the workpiece weight value, and generate a plurality of first quantity parameter values. one equation, and calculate the respective second comparable energy consumption of the first equations; step S08 : calculate a plurality of errors between the first comparable energy consumption and the second comparable energy consumption respectively of the first equations value, and obtain the minimum error values corresponding to a second equation; Step S10: Randomly generate a plurality of second quantity parameter values corresponding to the burners, and calculate the second quantity parameter values according to the workpiece weight using the second equation, and perform an iterative operation to generate a plurality of third-quantity parameter values; and step S12 : controlling the operation of the burners according to the third-quantity parameter values.

Referring again to Figure 1 and Figure 2, Figure 2 is a schematic diagram of the structure of a combustion furnace according to an embodiment of the present invention. As shown in the figure, this embodiment is used in a combustion furnace 10, and a furnace body of the combustion furnace 10 is used. 12 is provided with a plurality of burners 14, the furnace body 12 is further provided with a processor 16, which is used to control the operation of the burners 14, in step S01, the processor 16 obtains or the user inputs the burners The number of burners 14 , such as four burners 14 , is used to determine the number of burners of the combustion furnace 10 to prevent incorrect parameter values from being set.

Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S02 , the processor 16 first obtains a workpiece weight value of the workpiece to be processed, and the corresponding burners 14 a preset quantity parameter value, wherein the preset quantity parameter value includes a preset burner switching mode and a preset heat storage time, the preset burner switching mode is corresponding to the switching modes of the burners 14 , The preset heat storage time is the total operation time of the burners 14 . For example, the first and second burners are turned on for 10 seconds, the third and fourth burners are turned off for 10 seconds, and the first and second burners are turned off for 10 seconds. Second, the third and fourth burners are turned on for 10 seconds, so the total operating time of the burners is 20 seconds.

Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S04, the processor 16 obtains a fuel usage amount corresponding to the preset number parameter value, that is, the burners 14. The total amount of fuel used in a processing time course, the processor 16 then calculates a first comparable energy consumption of the preset quantity parameter value according to the workpiece weight value and the fuel consumption, wherein the first comparable energy consumption It is the ratio of the amount of fuel used and the weight of the workpiece; in this case In an embodiment, the fuel usage can be obtained by using the burners 14 to actually operate and burn according to the preset quantity parameter value, or obtained through a preset mathematical model built in the processor 16 .

Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S06, the processor 16 generates a plurality of first quantity parameter values corresponding to the burners 14, and the processor 16 performing a curve fitting operation on the first quantity parameter values according to the workpiece weight value, generating a plurality of first equations, and calculating a second comparable energy consumption of each of the first equations, wherein the A first quantity parameter value includes a first burner switching mode and a first heat storage time, the first burner switching mode corresponds to the switching modes of the burners 14 , and the first heat storage time is the The total operating time of each burner 14; in this embodiment, the curve fitting operation obtains a number of discrete data through methods such as sampling and experiments, and obtains a continuous function according to these data, and the curve fitting includes n the first equations of order, where n is greater than 1, to generate the first equations.

其中，該均方根誤差(RSME)之均方根差的預測值y _i 係對時間i的迴歸應變項(自變數和應變數)，y _i 係以m個不同的預測來做為其均方差的平方根。 Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S08 , the processor 16 calculates the first comparable energy consumption and the second one of the first equations respectively. A plurality of error values of comparable energy consumption are obtained, and the minimum error values are corresponding to a second equation, wherein the error value is calculated by a root mean square error (RSME), and the root mean square error (RSME) is As formula (1);

Among them, the predicted value y _i of the root mean square error (RSME) of the root mean square error is the regression strain term (independent variable and strain number) for time i , and y _i is the average of m different predictions. Square root of variance.

Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S10 , the processor 16 randomly generates a plurality of second ones corresponding to the burners 14 Quantity parameter values, and use the second equation to calculate the second quantity parameter values according to the workpiece weight, and perform an iterative operation to generate a plurality of third quantity parameter values, wherein the second quantity The parameter values include a second burner switching mode and a second heat storage time, the second burner switching mode is corresponding to the switching modes of the burners 14 , and the second heat storage time is the burners 14 the total operating time, and the third parameter values include a third burner switching mode and a third heat storage time, the third burner switching mode is corresponding to the switching modes of the burners 14, and The third heat storage time is the total operation time of the burners 14 ; in this embodiment, an iteration number of the iterative operation is 5 to 100 times.

Referring to FIG. 1 and FIG. 2 again, as shown in the figures, in this embodiment, in step S12, the processor 16 controls the operation of the burners 14 according to the third parameter values, that is, The processor 16 controls the burners 14 according to the third burner switching modes included in the third quantity parameter values for the third heat storage time.

Please refer to FIG. 3 , which is a schematic diagram of the iterative operation steps according to the embodiment of the present invention. As shown in the figure, in this embodiment, the iterative operation includes the steps: Step S22 : set these second quantity parameters The values are respectively substituted into the second equation, and a plurality of third comparable energy consumptions are generated; Step S24 : Obtain the largest third comparable energy consumptions and the smallest third comparable energy consumptions, and obtain the largest third comparable energy consumption according to the largest third comparable energy consumption. some third comparable energy consumptions and the smallest ones of the third comparable energy consumptions to generate a comparable energy consumption range; and step S26 : obtaining a fourth parameter value according to the comparable energy consumption range, and set the largest of these third The comparable energy consumption corresponding to the second quantity parameter values is replaced to generate the third quantity parameter values.

Referring to FIG. 2 and FIG. 3 again, as shown in the figures, in this embodiment, in step S22, the processor 16 respectively substitutes the parameter values of the second quantity into the second equation to calculate and generate A plurality of third comparable energy consumptions.

Referring to FIG. 2 and FIG. 3 again, as shown in the figures, in this embodiment, in step S24, the processor 16 obtains the second quantities with the best comparable energy consumption and the worst comparable energy consumption The parameter value is to obtain the largest third comparable energy consumption and the smallest third comparable energy consumption, and based on the largest third comparable energy consumption and the smallest third comparable energy consumption energy consumption to generate a comparable energy consumption range, the comparable energy consumption range is a range of quantitative parameter values, for example, the heat storage time of the burners 14 is set to be in the range of 10 seconds to 80 seconds.

Referring to FIG. 2 and FIG. 3 again, as shown in the figures, in this embodiment, in step S26, a fourth parameter value is obtained according to the comparable energy consumption range, and the largest third possible energy The consumption corresponding to the second quantity parameter values is replaced to generate the third quantity parameter values, wherein the fourth quantity parameter value includes a fourth burner switching mode and a fourth heat storage time, the fourth burner The switching mode corresponds to the on/off of the burners, and the fourth heat storage time is the total operation time of the burners 14 .

Please refer to FIG. 4 , which is a schematic diagram of another step flow of the embodiment of the present invention. As shown in the figure, in step S12 of the present embodiment, the operation of the burners is controlled according to the parameter values of the third quantity. After the step, it further includes the step of: Step S14: Obtaining one of the third quantity parameter values, and feeding back the preset quantity parameter value.

In step S14, after obtaining one of the third quantity parameter values, the processor 16 feeds back one of the third quantity parameter values to the preset quantity parameter value, and uses the third combustion The burner switching mode and the third heat storage time are correspondingly updated, and the preset burner switching mode and the preset heat storage time are updated accordingly.

The present embodiment is a burner control method, which firstly obtains the preset parameter values of the burners 14 of the burner 10, and simulates or actually runs combustion in the processor, and according to the burners 14 The fuel consumption of the burner 14, calculate the first comparable energy consumption of the preset quantity parameter value to the combustion furnace, and then generate the first quantity parameter values, and according to the first comparable energy consumption Perform a curve fitting operation on the parameter values of the first quantity, calculate a plurality of second comparable energy consumptions, compare and calculate the error values of the first and second comparable energy consumptions, and obtain the first equation with the smallest error value , and then use the first equation to calculate the randomly obtained second quantity parameter values, and perform an iterative operation on them to generate the best third quantity parameter value, and control these according to the last obtained third quantity parameter value For the operation of the individual burners 14, the present embodiment utilizes the obtained optimal parameter values to control the burners, which are applied to different combustion furnaces, and can continuously improve the combustion efficiency of the individual burners 14, thereby reducing the time spent in the combustion furnace during heating. fuel consumption.

To sum up, the present invention provides a burner control method, the present invention provides a burner control method, which obtains the preset quantity parameter value corresponding to the burner, calculates the comparable energy consumption correspondingly, and then generates a plurality of quantities parameter value, and perform curve fitting operation on it, calculate the comparable energy consumption, and calculate the error value of the two comparable energy consumption, obtain the best equation, calculate another parameter value with the best equation, and perform iterative operation, Generate another quantity parameter value, and control the operation of the burner according to the last obtained quantity parameter value, so as to find the best burner control mode, and solve the problem of using the same burner control mode and method in different burners in the prior art , resulting in different combustion efficiency of the combustion furnace, resulting in the unsteady control of fuel consumption, resulting in more cost problems.

Therefore, the present invention is indeed novel, progressive and available for industrial use, and it should meet the requirements for patent application in my country's patent law.

However, the above is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes and modifications made in accordance with the shape, structure, feature and spirit described in the scope of the patent application of the present invention, All should be included in the scope of the patent application of the present invention.

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Claims (11)

A control method for a burner, the steps comprising: Get the number of burners; Obtain a workpiece weight value and a preset quantity parameter value corresponding to these burners; Obtaining a fuel usage amount corresponding to the preset number parameter value, and calculating a first comparable energy consumption of the preset number parameter value according to the workpiece weight value and the fuel usage amount; generating a plurality of first quantity parameter values corresponding to the burners, performing a curve fitting operation on the first quantity parameter values according to the workpiece weight value, generating a plurality of first equations, and calculating the plurality of first quantities A second comparable energy consumption of a respective one of the equations; calculating a plurality of error values between the first comparable energy consumption and the second comparable energy consumption respectively of the first equations, and obtaining a second equation corresponding to the smallest error values; Randomly generate a plurality of parameter values of the second quantity corresponding to the burners, and calculate the parameter values of the second quantity according to the weight of the workpiece with the second equation, and perform an iterative operation to generate a plurality of parameter values of the second quantity three-quantity parameter value; and controlling the operation of the burners according to the values of the third quantity parameters; Wherein, the third quantity parameter values respectively include a third burner switching mode and a third heat storage time, and the third burner switching mode corresponds to the switches of the burners. The burner control method according to claim 1, wherein in the steps of obtaining a workpiece weight value and obtaining a preset number parameter value corresponding to a plurality of burners, the first comparable energy consumption is the fuel usage amount and the Workpiece weight ratio. The burner control method according to claim 1, wherein the burners are arranged in a furnace body of a combustion furnace. The burner control method as claimed in claim 1, wherein the preset quantity parameter value includes a preset burner switching mode and a preset heat storage time, and the preset burner switching mode is corresponding to the number of burners. switch. The burner control method according to claim 1, wherein the first quantity parameter values respectively comprise a first burner switching mode and a first heat storage time, and the first burner switching mode corresponds to the A burner switch. The control method of a burner according to claim 1, wherein the second quantity parameter values respectively comprise a second burner switching mode and a second heat storage time, and the second burner switching mode corresponds to the A burner switch. The burner control method according to claim 1, wherein a plurality of first quantity parameter values corresponding to the burners are randomly generated, and a curve fitting is performed on the first quantity parameter values according to the workpiece weight value In the step of combining operation, generating a plurality of first equations, and calculating a second comparable energy consumption of each of the first equations, the curve fitting operation includes the first equations of order n, wherein n is greater than 1. The burner control method as claimed in claim 1, wherein a plurality of error values between the first comparable energy consumption and the second comparable energy consumption of the first equations are calculated, and the minimum ones are obtained In the step where the error value corresponds to a second equation, the error value is calculated as a root mean square error (RSME). According to the control method of the burner according to claim 1, a plurality of second quantity parameter values corresponding to the burners are randomly generated, and the second quantity parameters are respectively calculated by the second equation according to the workpiece weight. value, and perform an iterative operation to generate a plurality of third-quantity parameter values, the iterative operation includes the steps: Substitute the parameter values of the second quantities into the second equation respectively, and generate a plurality of third comparable energy consumptions; Obtain the largest third comparable energy consumption and the smallest third comparable energy consumption, and generate a comparable energy consumption according to the largest third comparable energy consumption and the smallest third comparable energy consumption energy consumption range; and Obtaining a fourth quantity parameter value according to the comparable energy consumption range, and replacing the second quantity parameter values corresponding to the maximum third comparable energy consumption values to generate the third quantity parameter values. The control method for a burner as claimed in claim 1, wherein an iteration number of the iterative operation is 5 to 100 times. The control method for a burner according to claim 1, further comprising the steps of: One of the third quantity parameter values is obtained and fed back to the preset quantity parameter value.

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