Automatic dosing system and method of use thereof

Abstract

The present invention relates to the technical field of water dosing, and in particular to an automatic dosing system and a method for using the same. The system comprises: an acquisition module for acquiring the water flow rate and a first pH value of a water supply solution in real time; a judgment module for determining the pH qualification of the current water supply solution based on the water flow rate and the first pH value, and if the pH qualification is less than a preset qualification, calculating the pH qualification difference between the preset qualification and the pH qualification; a dosing module for determining the dosing concentration and the potion-water ratio based on the pH qualification difference, and mixing the potion-water ratio in a mixing box to obtain a potion-water solution; a control module for conveying the potion-water solution to a premixing module for stirring with the water supply solution, obtaining a second pH value of the stirred water supply solution, judging the pH difference between the second pH value and a preset standard pH range, and correcting the potion-water ratio based on the pH difference. The present invention solves the problem of inaccurate water supply pH adjustment caused by differences in ammonia concentration and ammonia-water ratio each time.

Description

Technical Field

[0001] The present invention relates to the technical field of water dosing, and in particular to an automatic dosing system and a use method thereof. Background Art

[0002] The water vapor quality of thermal power plants is an important parameter for operation control. For example, in order to increase the pH value of boiler water in thermal power plants, a certain amount of ammonia needs to be added to reduce the corrosion of boiler equipment in thermal power plants caused by the low pH value of boiler water.

[0003] In the prior art, when the pH value of the feed water is low or high, manual operation is required to prepare the corresponding ammonia solution. When preparing ammonia water, ammonia water and water are mixed according to a certain ratio or empirical value. However, there are differences in the concentration of ammonia and the ratio of ammonia water each time, resulting in inaccurate adjustment of the pH value of the feed water. Therefore, how to improve the accuracy of the ammonia ratio and pH value adjustment is a technical problem that needs to be solved. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an automatic dosing system and its use method, which solves the problem of inaccurate pH adjustment of water supply caused by differences in ammonia concentration and ammonia-water ratio each time.

[0005] In order to achieve the above object, the present invention provides an automatic dosing system, which includes:

[0006] an acquisition module, for acquiring a water flow rate and a first pH value of the water supply solution in real time;

[0007] a judgment module, configured to determine a pH qualification of a current water supply solution according to a water supply flow rate and a first pH value; if the pH qualification is less than a preset qualification, the current water supply solution is delivered to a premixing module and a pH qualification difference between the preset qualification and the pH qualification is calculated;

[0008] The dosing module includes multiple concentration dosing boxes, a dosing pump, and a mixing box. The dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, and mix the medicine solution in the mixing box according to the medicine solution ratio to obtain a medicine solution;

[0009] The control module is used to transport the aqueous solution to the premixing module for stirring with the water solution, obtain a second pH value of the stirred water solution, determine the pH difference between the second pH value and a preset standard pH range, and correct the ratio of the aqueous solution according to the pH difference.

[0010] In some embodiments of the present application, determining the pH qualification of the current water supply solution according to the water supply flow rate and the first pH value includes:

[0011] The calculation formula for the pH qualification of the current water solution is:

[0012] ;

[0013] Wherein, H is the pH qualification, P1 is the first pH value, P0 is the first preset pH value, K0 is the water flow rate, a is the water supply variation coefficient, exp is the exponential function sign, wherein the first preset pH value is the pH value closest to the current first pH value within the preset standard pH range;

[0014] The judgment module sets a preset qualification level H0 based on historical operation data;

[0015] When H<H0, the current water solution is delivered to the premixing module and the pH qualification difference H0-H is calculated;

[0016] When H≥H0, the first pH value and the water flow rate are input into the pH prediction model, which outputs a pH prediction value after a preset period of time, and obtains the pH prediction qualification according to the pH prediction value and the flow rate prediction value.

[0017] In some embodiments of the present application, the dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, including:

[0018] The dosing module is used to pre-set a first preset pH pass difference H01, a second preset pH pass difference H02, a third preset pH pass difference H03, and a fourth preset pH pass difference H04, and H01<H02<H03<H04; and also pre-set a first preset dosing concentration N1, a second preset dosing concentration N2, a third preset dosing concentration N3, and a fourth preset dosing concentration N4, and N1<N2<N3<N4;

[0019] The dosing module is also pre-set with a first preset medicine ratio C1, a second preset medicine ratio C2, a third preset medicine ratio C3, and a fourth preset medicine ratio C4, and C1<C2<C3<C4;

[0020] When H0-H<H01, the first preset dosing concentration is selected as the current dosing concentration, and the first preset liquid medicine ratio C1 is selected as the current liquid medicine ratio;

[0021] When H01≤H0-H<H02, the second preset dosing concentration is selected as the current dosing concentration, and the second preset liquid medicine ratio C2 is selected as the current liquid medicine ratio;

[0022] When H02≤H0-H<H03, the third preset dosing concentration is selected as the current dosing concentration, and the third preset liquid medicine ratio C3 is selected as the current liquid medicine ratio;

[0023] When H03≤H0-H<H04, the fourth preset dosing concentration is selected as the current dosing concentration, and the fourth preset liquid medicine ratio C4 is selected as the current liquid medicine ratio.

[0024] In some embodiments of the present application, the control module determines the pH difference between the second pH value and the preset standard pH range, and corrects the potion ratio according to the pH difference, including:

[0025] The control module calculates the pH difference P2-PN between the second pH value P2 and the preset standard pH interval PN, and corrects the current potion ratio according to P2-PN;

[0026] The control module is pre-set with a first preset pH difference value P01, a second preset pH difference value P02, a third preset pH difference value P03, and a fourth preset pH difference value P04, and P01<P02<0<P03<P04; the control module is also pre-set with a first preset first correction coefficient α1, a second preset first correction coefficient α2, a third preset first correction coefficient α3, and a fourth preset first correction coefficient α4, and 0.6<α1<α2<1<α3<α4<1.4;

[0027] When P2-PN<P01, the fourth preset first correction coefficient α4 is selected to correct the first preset liquid medicine ratio C1, and the corrected value is C1*α4;

[0028] When P01≤P2-PN<P02, the third preset first correction coefficient α3 is selected to correct the second preset potion ratio C2, and the corrected value is C2*α3;

[0029] When P02≤P2-PN<0 or 0<P2-PN<P03, the second preset first correction coefficient α2 is selected to correct the third preset potion ratio C3, and the corrected value is C3*α2;

[0030] When P03≤P2-PN<P04, the first preset correction coefficient α1 is selected to correct the fourth preset liquid medicine ratio C4, and the corrected ratio is C4*α1.

[0031] In some embodiments of the present application, the control module is further configured to calculate the outlet flow rate of the dosing pump based on the water flow rate, the dosing pump speed, and the actual dosing concentration;

[0032] The outlet flow rate of the dosing pump is:

[0033] ;

[0034] Among them, Q0 is the outlet flow of the dosing pump, Ni is the dosing concentration (i=1,2,3,4), N0 is the actual dosing concentration, K0 is the water flow rate, x is a constant, and x<1, and v is the speed of the dosing pump.

[0035] In some embodiments of the present application, the control module is further configured to perform a secondary correction on the drug-liquid ratio Cnαi (n=1, 2, 3, 4, i=1, 2, 3, 4) after the primary correction according to the outlet flow rate of the dosing pump and the actual flow rate, and the control module calculates the flow difference Q0-Q between the outlet flow rate Q0 and the actual flow rate Q;

[0036] The control module is pre-set with a first preset flow difference Q01, a second preset flow difference Q02, a third preset flow difference Q03, and a fourth preset flow difference Q04, and Q01<Q02<0<Q03<Q04; the control module is also pre-set with a first preset second correction coefficient β1, a second preset second correction coefficient β2, a third preset second correction coefficient β3, and a fourth preset second correction coefficient β4, and 0.8<β1<β2<1<β3<β4<1.2;

[0037] When Q0-Q<Q01, the first preset second correction coefficient β1 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β1*Cn*αi;

[0038] When Q01≤Q0-Q<Q02, the second preset second correction coefficient β2 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β2*Cn*αi;

[0039] When Q02≤Q0-Q<0 or 0<Q0-Q<Q03, the third preset second correction coefficient β3 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β3*Cn*αi;

[0040] When Q03≤Q0-Q<Q04, the fourth preset second correction coefficient β4 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β4*Cn*αi.

[0041] In some embodiments of the present application, the first pH value and the water flow rate are input into the pH prediction model, including:

[0042] Acquire multiple sets of historical water supply data, wherein the historical water supply data includes historical water supply flow and corresponding historical pH values;

[0043] Preprocess the historical water supply data, divide the preprocessed historical water supply data into a training set and a test set, train and optimize the least squares model, and obtain the optimized pH prediction model;

[0044] The current water flow rate and the first pH value are used as input, and the flow rate prediction value and the corresponding pH prediction value after N seconds are output.

[0045] In some embodiments of the present application, a method for using the automatic dosing system is also included:

[0046] obtaining a water flow rate and a first pH value of the water solution in real time;

[0047] determining a pH qualification of the current water supply solution according to the water supply flow rate and the first pH value, and if the pH qualification is less than a preset qualification, delivering the current water supply solution to the premixing module and calculating a pH qualification difference between the preset qualification and the pH qualification;

[0048] Determine the dosing concentration and the potion-water ratio according to the pH qualification difference, mix them in a mixing box according to the potion-water ratio to obtain a potion-water solution;

[0049] The medicine solution is transported to the premixing module and stirred with the water solution to obtain a second pH value of the stirred water solution. The pH difference between the second pH value and the preset standard pH range is determined, and the medicine ratio is corrected according to the pH difference.

[0050] In some embodiments of the present application, the method further comprises:

[0051] The outlet flow of the dosing pump is calculated according to the water flow, the speed of the dosing pump and the actual dosing concentration, and the medicine-water ratio after the primary correction is corrected for the secondary time according to the outlet flow of the dosing pump and the actual flow.

[0052] The present invention provides an automatic dosing system and a method for using the same, which have the following beneficial effects compared to the prior art:

[0053] The present invention discloses an automatic dosing system and a method for using the same. The system obtains the pH value and flow rate of feed water, accurately calculates the pH qualification, calculates the pH qualification difference if the pH qualification is less than a preset qualification, determines the dosing concentration and the medicine-water ratio according to the pH qualification difference, stirs the medicine-water solution and the feed water solution to obtain a second pH value of the stirred feed water solution, determines the pH difference between the second pH value and the first preset pH value, makes a primary correction to the medicine-water ratio according to the pH difference, and makes a secondary correction to the medicine-water ratio according to the flow difference between the outlet flow rate of a dosing pump and the actual flow rate, adjusts the pH value of the feed water solution with the prepared medicine-water solution within a standard pH range, solves the problem of inaccurate feed water pH adjustment caused by differences in ammonia concentration and ammonia-water ratio each time, and greatly improves the accuracy of ammonia ratio and pH adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic structural diagram of an automatic dosing system according to an embodiment of the present invention is shown;

[0055] Figure 2 A flow chart showing a method for using an automatic dosing system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0056] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0057] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0061] like Figure 1 As shown, an embodiment of the present invention discloses an automatic dosing system, which includes:

[0062] an acquisition module, for acquiring a water flow rate and a first pH value of the water supply solution in real time;

[0063] a judgment module, configured to determine a pH qualification of a current water supply solution according to a water supply flow rate and a first pH value; if the pH qualification is less than a preset qualification, the current water supply solution is delivered to a premixing module and a pH qualification difference between the preset qualification and the pH qualification is calculated;

[0064] The dosing module includes multiple concentration dosing boxes, a dosing pump, and a mixing box. The dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, and mix the medicine solution in the mixing box according to the medicine solution ratio to obtain a medicine solution;

[0065] The control module is used to transport the aqueous solution to the premixing module for stirring with the water solution, obtain a second pH value of the stirred water solution, determine the pH difference between the second pH value and a preset standard pH range, and correct the ratio of the aqueous solution according to the pH difference.

[0066] In this embodiment, the preset qualification is determined based on the pH qualification corresponding to the water flow rate that is the same as the current water flow rate in the historical operation data. When the pH qualification is less than the preset qualification, it means that the pH value needs to be adjusted. If the pH value is measured directly, the pH value will be affected by many factors, and the directly measured pH value is inaccurate. The judgment is made based on the pH qualification, which improves the accuracy of the pH value. The dosing concentration and the potion-water ratio are determined based on the pH qualification difference. The dosing concentration has four ammonia concentrations: low, relatively low, medium and high. The potion-water ratio is the ratio of ammonia to water. The preset standard pH range is 7-9. The pH difference between the second pH value and the preset standard pH range is the difference between the second pH value and the pH value closest to the two end points of the preset standard pH range. For example, if the second pH difference is 7.5, that is, the pH difference between 7.5 and 7. If the second pH difference is 9.5, that is, the pH difference between 9.5 and 9.

[0067] In some embodiments of the present application, determining the pH qualification of the current water supply solution according to the water supply flow rate and the first pH value includes:

[0068] The calculation formula for the pH qualification of the current water solution is:

[0069] ;

[0070] Wherein, H is the pH qualification, P1 is the first pH value, P0 is the first preset pH value, K0 is the water flow rate, a is the water supply variation coefficient, exp is the exponential function sign, wherein the first preset pH value is the pH value closest to the current first pH value within the preset standard pH range;

[0071] The judgment module sets a preset qualification level H0 based on historical operation data;

[0072] When H<H0, the current water solution is delivered to the premixing module and the pH qualification difference H0-H is calculated;

[0073] When H≥H0, the first pH value and the water flow rate are input into the pH prediction model, which outputs a pH prediction value after a preset period of time, and obtains the pH prediction qualification according to the pH prediction value and the flow rate prediction value.

[0074] In this embodiment, after obtaining the PH prediction qualification according to the PH prediction value and the flow prediction value, if the PH prediction qualification is less than the preset qualification, the PH prediction qualification difference between the preset qualification and the PH prediction qualification is calculated, and the dosing concentration and the medicine-solution ratio are determined in advance according to the PH prediction qualification difference. After the preset period of time, it is determined whether the difference between the first PH value and the PH prediction value is within the PH prediction error range. If so, the dosing concentration and the medicine-solution ratio determined in advance are used for dosing. If not, the dosing concentration and the medicine-solution ratio determined in advance are corrected according to the difference between the first PH value and the PH prediction value.

[0075] In some embodiments of the present application, the dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, including:

[0076] The dosing module is used to pre-set a first preset pH pass difference H01, a second preset pH pass difference H02, a third preset pH pass difference H03, and a fourth preset pH pass difference H04, and H01<H02<H03<H04; and also pre-set a first preset dosing concentration N1, a second preset dosing concentration N2, a third preset dosing concentration N3, and a fourth preset dosing concentration N4, and N1<N2<N3<N4;

[0077] The dosing module is also pre-set with a first preset medicine ratio C1, a second preset medicine ratio C2, a third preset medicine ratio C3, and a fourth preset medicine ratio C4, and C1<C2<C3<C4;

[0078] When H0-H<H01, the first preset dosing concentration is selected as the current dosing concentration, and the first preset liquid medicine ratio C1 is selected as the current liquid medicine ratio;

[0079] When H01≤H0-H<H02, the second preset dosing concentration is selected as the current dosing concentration, and the second preset liquid medicine ratio C2 is selected as the current liquid medicine ratio;

[0080] When H02≤H0-H<H03, the third preset dosing concentration is selected as the current dosing concentration, and the third preset liquid medicine ratio C3 is selected as the current liquid medicine ratio;

[0081] When H03≤H0-H<H04, the fourth preset dosing concentration is selected as the current dosing concentration, and the fourth preset liquid medicine ratio C4 is selected as the current liquid medicine ratio.

[0082] In some embodiments of the present application, the control module determines the pH difference between the second pH value and the preset standard pH range, and corrects the potion ratio according to the pH difference, including:

[0083] The control module calculates the pH difference P2-PN between the second pH value P2 and the preset standard pH interval PN, and corrects the current potion ratio according to P2-PN;

[0084] The control module is pre-set with a first preset pH difference value P01, a second preset pH difference value P02, a third preset pH difference value P03, and a fourth preset pH difference value P04, and P01<P02<0<P03<P04; the control module is also pre-set with a first preset first correction coefficient α1, a second preset first correction coefficient α2, a third preset first correction coefficient α3, and a fourth preset first correction coefficient α4, and 0.6<α1<α2<1<α3<α4<1.4;

[0085] When P2-PN<P01, the fourth preset first correction coefficient α4 is selected to correct the first preset liquid medicine ratio C1, and the corrected value is C1*α4;

[0086] When P01≤P2-PN<P02, the third preset first correction coefficient α3 is selected to correct the second preset potion ratio C2, and the corrected value is C2*α3;

[0087] When P02≤P2-PN<0 or 0<P2-PN<P03, the second preset first correction coefficient α2 is selected to correct the third preset potion ratio C3, and the corrected value is C3*α2;

[0088] When P03≤P2-PN<P04, the first preset correction coefficient α1 is selected to correct the fourth preset liquid medicine ratio C4, and the corrected ratio is C4*α1.

[0089] In this embodiment, when the pH difference is less than 0, the proportion of the liquid medicine, i.e., the proportion of ammonia, should be appropriately increased; when the pH difference is greater than 0, the proportion of the liquid medicine, i.e., the proportion of ammonia, should be appropriately reduced, so that the pH is adjusted to within the standard pH range.

[0090] In some embodiments of the present application, the control module is further configured to calculate the outlet flow rate of the dosing pump based on the water flow rate, the dosing pump speed, and the actual dosing concentration;

[0091] The outlet flow rate of the dosing pump is:

[0092] ;

[0093] Among them, Q0 is the outlet flow of the dosing pump, Ni is the dosing concentration (i=1,2,3,4), N0 is the actual dosing concentration, K0 is the water flow rate, x is a constant, and x<1, and v is the speed of the dosing pump.

[0094] In some embodiments of the present application, the control module is further configured to perform a secondary correction on the drug-liquid ratio Cnαi (n=1, 2, 3, 4, i=1, 2, 3, 4) after the primary correction according to the outlet flow rate of the dosing pump and the actual flow rate, and the control module calculates the flow difference Q0-Q between the outlet flow rate Q0 and the actual flow rate Q;

[0095] The control module is pre-set with a first preset flow difference Q01, a second preset flow difference Q02, a third preset flow difference Q03, and a fourth preset flow difference Q04, and Q01<Q02<0<Q03<Q04; the control module is also pre-set with a first preset second correction coefficient β1, a second preset second correction coefficient β2, a third preset second correction coefficient β3, and a fourth preset second correction coefficient β4, and 0.8<β1<β2<1<β3<β4<1.2;

[0096] When Q0-Q<Q01, the first preset second correction coefficient β1 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β1*Cn*αi;

[0097] When Q01≤Q0-Q<Q02, the second preset second correction coefficient β2 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β2*Cn*αi;

[0098] When Q02≤Q0-Q<0 or 0<Q0-Q<Q03, the third preset second correction coefficient β3 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β3*Cn*αi;

[0099] When Q03≤Q0-Q<Q04, the fourth preset second correction coefficient β4 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β4*Cn*αi.

[0100] In some embodiments of the present application, the first pH value and the water flow rate are input into the pH prediction model, including:

[0101] Acquire multiple sets of historical water supply data, wherein the historical water supply data includes historical water supply flow and corresponding historical pH values;

[0102] Preprocess the historical water supply data, divide the preprocessed historical water supply data into a training set and a test set, train and optimize the least squares model, and obtain the optimized pH prediction model;

[0103] The current water flow rate and the first pH value are used as input, and the flow rate prediction value and the corresponding pH prediction value after N seconds are output.

[0104] In some embodiments of the present application, Figure 2As shown, it also includes a method for using the automatic dosing system:

[0105] Step S201: obtaining the water flow rate and the first pH value of the water solution in real time;

[0106] Step S202: determining the pH qualification of the current water supply solution based on the water supply flow rate and the first pH value; if the pH qualification is less than a preset qualification, delivering the current water supply solution to the premixing module and calculating the pH qualification difference between the preset qualification and the pH qualification;

[0107] Step S203: Determine the dosing concentration and the potion-solution ratio according to the pH qualification difference, and mix the two solutions in a mixing box according to the potion-solution ratio to obtain a potion-solution solution;

[0108] Step S204: delivering the medicine solution to the premixing module and stirring it with the water solution to obtain a second pH value of the stirred water solution, determining the pH difference between the second pH value and a preset standard pH range, and correcting the medicine solution ratio according to the pH difference.

[0109] In some embodiments of the present application, the method further comprises:

[0110] Step S205: Calculate the outlet flow of the dosing pump according to the water flow, the dosing pump speed and the actual dosing concentration, and perform a secondary correction on the corrected drug-water ratio according to the outlet flow of the dosing pump and the actual flow.

[0111] In summary, the present invention discloses an automatic dosing system and a method for using the same, which includes: an acquisition module for acquiring a water flow rate and a first pH value of a water solution in real time; a judgment module for determining the pH qualification of the current water solution based on the water flow rate and the first pH value, and if the pH qualification is less than a preset qualification, the current water solution is transported to a premixing module and a pH qualification difference between the preset qualification and the pH qualification is calculated; a dosing module, including a plurality of concentration dosing boxes, a dosing pump and a mixing box, the dosing module is used to determine the dosing concentration and the potion ratio based on the pH qualification difference, and mix the potion in the mixing box according to the potion ratio to obtain a potion solution; a control module is used to transport the potion solution to the premixing module for stirring with the water solution to obtain a second pH value of the water solution after stirring, judge the pH difference between the second pH value and the first preset pH value, and correct the potion ratio according to the pH difference.

[0112] The present invention obtains the pH value and water flow of the water supply, accurately calculates the pH qualification degree, calculates the pH qualification degree difference if the pH qualification degree is less than the preset qualification degree, determines the dosing concentration and the medicine-to-water ratio according to the pH qualification degree difference, stirs the medicine solution and the water supply solution to obtain a second pH value of the water supply solution after stirring, judges the pH difference between the second pH value and the first preset pH value, makes a primary correction to the medicine-to-water ratio according to the pH difference, makes a secondary correction to the medicine-to-water ratio according to the flow difference between the outlet flow rate of the dosing pump and the actual flow rate, adjusts the pH value of the water supply solution with the prepared medicine solution within the standard pH range, solves the problem of inaccurate water supply pH adjustment caused by differences in ammonia concentration and ammonia-to-water ratio each time, and greatly improves the accuracy of ammonia ratio and pH value adjustment.

[0113] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0114] Although the present invention has been described above with reference to exemplary embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various features of the disclosed embodiments may be combined with one another in any manner, provided no structural conflicts exist. These combinations are not fully described in this specification solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0115] Those skilled in the art will understand that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will still be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic dosing system, applied to a water supply system, characterized in that: include: an acquisition module, for acquiring a water flow rate and a first pH value of the water supply solution in real time; a judgment module, configured to determine a pH qualification of a current water supply solution according to a water supply flow rate and a first pH value; if the pH qualification is less than a preset qualification, the current water supply solution is delivered to a premixing module and a pH qualification difference between the preset qualification and the pH qualification is calculated; The dosing module includes multiple concentration dosing boxes, a dosing pump, and a mixing box. The dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, and mix the medicine solution in the mixing box according to the medicine solution ratio to obtain a medicine solution; a control module configured to deliver the medicinal solution to the premixing module for mixing with the feed water solution, obtain a second pH value of the stirred feed water solution, determine a pH difference between the second pH value and a preset standard pH range, and correct the medicinal solution ratio according to the pH difference; Determining the pH qualification of the current water supply solution according to the water supply flow rate and the first pH value includes: The calculation formula for the pH qualification of the current water solution is: ； Wherein, H is the pH qualification, P1 is the first pH value, P0 is the first preset pH value, K0 is the water flow rate, a is the water supply variation coefficient, exp is the exponential function sign, wherein the first preset pH value is the pH value closest to the current first pH value within the preset standard pH range; The judgment module sets a preset qualification level H0 based on historical operation data; When H<H0, the current water solution is delivered to the premixing module and the pH qualification difference H0-H is calculated; When H≥H0, the first pH value and the water flow rate are input into the pH prediction model, which outputs a pH prediction value after a preset period of time, and obtains the pH prediction qualification according to the pH prediction value and the flow rate prediction value.

2. The automatic dosing system according to claim 1, characterized in that: The dosing module is used to determine the dosing concentration and the ratio of the medicine solution according to the pH qualification difference, including: The dosing module is used to pre-set a first preset pH pass difference H01, a second preset pH pass difference H02, a third preset pH pass difference H03, and a fourth preset pH pass difference H04, and H01<H02<H03<H04; and also pre-set a first preset dosing concentration N1, a second preset dosing concentration N2, a third preset dosing concentration N3, and a fourth preset dosing concentration N4, and N1<N2<N3<N4; The dosing module is also pre-set with a first preset medicine ratio C1, a second preset medicine ratio C2, a third preset medicine ratio C3, and a fourth preset medicine ratio C4, and C1<C2<C3<C4; When H0-H<H01, the first preset dosing concentration is selected as the current dosing concentration, and the first preset liquid medicine ratio C1 is selected as the current liquid medicine ratio; When H01≤H0-H<H02, the second preset dosing concentration is selected as the current dosing concentration, and the second preset liquid medicine ratio C2 is selected as the current liquid medicine ratio; When H02≤H0-H<H03, the third preset dosing concentration is selected as the current dosing concentration, and the third preset liquid medicine ratio C3 is selected as the current liquid medicine ratio; When H03≤H0-H<H04, the fourth preset dosing concentration is selected as the current dosing concentration, and the fourth preset liquid medicine ratio C4 is selected as the current liquid medicine ratio.

3. The automatic dosing system according to claim 2, characterized in that: The control module determines the pH difference between the second pH value and the preset standard pH range, and corrects the potion ratio according to the pH difference, including: The control module calculates the pH difference P2-PN between the second pH value P2 and the preset standard pH interval PN, and corrects the current potion ratio according to P2-PN; The control module is pre-set with a first preset pH difference value P01, a second preset pH difference value P02, a third preset pH difference value P03, and a fourth preset pH difference value P04, and P01<P02<0<P03<P04; the control module is also pre-set with a first preset first correction coefficient α1, a second preset first correction coefficient α2, a third preset first correction coefficient α3, and a fourth preset first correction coefficient α4, and 0.6<α1<α2<1<α3<α4<1.4; When P2-PN<P01, the fourth preset first correction coefficient α4 is selected to correct the first preset liquid medicine ratio C1, and the corrected value is C1*α4; When P01≤P2-PN<P02, the third preset first correction coefficient α3 is selected to correct the second preset potion ratio C2, and the corrected value is C2*α3; When P02≤P2-PN<0 or 0<P2-PN<P03, the second preset first correction coefficient α2 is selected to correct the third preset potion ratio C3, and the corrected value is C3*α2; When P03≤P2-PN<P04, the first preset correction coefficient α1 is selected to correct the fourth preset liquid medicine ratio C4, and the corrected ratio is C4*α1.

4. The automatic dosing system according to claim 3, characterized in that: The control module is further configured to calculate the outlet flow of the dosing pump according to the water flow rate, the speed of the dosing pump and the actual dosing concentration; The outlet flow rate of the dosing pump is: Among them, Q0 is the outlet flow of the dosing pump, Ni is the dosing concentration (i=1,2,3,4), N0 is the actual dosing concentration, K0 is the water flow rate, x is a constant, and x<1, and v is the speed of the dosing pump.

5. The automatic dosing system according to claim 4, characterized in that: The control module is further configured to perform a secondary correction on the drug-liquid ratio Cnαi (n=1, 2, 3, 4, i=1, 2, 3, 4) after the primary correction according to the outlet flow rate of the dosing pump and the actual flow rate. The control module calculates the flow difference Q0-Q between the outlet flow rate Q0 and the actual flow rate Q; The control module is pre-set with a first preset flow difference Q01, a second preset flow difference Q02, a third preset flow difference Q03, and a fourth preset flow difference Q04, and Q01<Q02<0<Q03<Q04; the control module is also pre-set with a first preset second correction coefficient β1, a second preset second correction coefficient β2, a third preset second correction coefficient β3, and a fourth preset second correction coefficient β4, and 0.8<β1<β2<1<β3<β4<1.2; When Q0-Q<Q01, the first preset second correction coefficient β1 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β1*Cn*αi; When Q01≤Q0-Q<Q02, the second preset second correction coefficient β2 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β2*Cn*αi; When Q02≤Q0-Q<0 or 0<Q0-Q<Q03, the third preset second correction coefficient β3 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β3*Cn*αi; When Q03≤Q0-Q<Q04, the fourth preset second correction coefficient β4 is selected to perform a secondary correction on the potion ratio Cn*αi, and the secondary correction is β4*Cn*αi.

6. The automatic dosing system according to claim 1, characterized in that: According to the first pH value and the water flow rate, the pH prediction model is input, including: Acquire multiple sets of historical water supply data, wherein the historical water supply data includes historical water supply flow and corresponding historical pH values; Preprocess the historical water supply data, divide the preprocessed historical water supply data into a training set and a test set, train and optimize the least squares model, and obtain the optimized pH prediction model; The current water flow rate and the first pH value are used as input, and the flow rate prediction value and the corresponding pH prediction value after N seconds are output.

7. A method for using the automatic dosing system according to any one of claims 1 to 6, characterized in that: include: obtaining a water flow rate and a first pH value of the water solution in real time; determining a pH qualification of the current water supply solution according to the water supply flow rate and the first pH value, and if the pH qualification is less than a preset qualification, delivering the current water supply solution to the premixing module and calculating a pH qualification difference between the preset qualification and the pH qualification; Determine the dosing concentration and the potion-water ratio according to the pH qualification difference, mix them in a mixing box according to the potion-water ratio to obtain a potion-water solution; The solution is transported to the premixing module and stirred with the feed water solution to obtain a second pH value of the stirred feed water solution, the pH difference between the second pH value and a preset standard pH range is determined, and the solution ratio is corrected according to the pH difference; Determining the pH qualification of the current water supply solution according to the water supply flow rate and the first pH value includes: The calculation formula for the pH qualification of the current water solution is: ； Wherein, H is the pH qualification, P1 is the first pH value, P0 is the first preset pH value, K0 is the water flow rate, a is the water supply variation coefficient, exp is the exponential function sign, wherein the first preset pH value is the pH value closest to the current first pH value within the preset standard pH range; The judgment module sets a preset qualification level H0 based on historical operation data; When H<H0, the current water solution is delivered to the premixing module and the pH qualification difference H0-H is calculated; When H≥H0, the first pH value and the water flow rate are input into the pH prediction model, which outputs a pH prediction value after a preset period of time, and obtains the pH prediction qualification according to the pH prediction value and the flow rate prediction value.

8. The method for using the automatic dosing system according to claim 7, characterized in that: Also includes: The outlet flow of the dosing pump is calculated according to the water flow rate, the speed of the dosing pump and the actual dosing concentration, and the corrected medicine-water ratio is corrected twice according to the outlet flow rate of the dosing pump and the actual flow rate.

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