CN113640225B - Sulfuric acid concentration monitoring system applied to manganese sulfate production - Google Patents
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 229940099596 manganese sulfate Drugs 0.000 title claims abstract description 13
- 235000007079 manganese sulphate Nutrition 0.000 title claims abstract description 13
- 239000011702 manganese sulphate Substances 0.000 title claims abstract description 13
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000001228 spectrum Methods 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 35
- 239000001257 hydrogen Substances 0.000 claims abstract description 35
- -1 hydrogen ions Chemical class 0.000 claims abstract description 35
- 230000008859 change Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims description 30
- 229910001437 manganese ion Inorganic materials 0.000 claims description 29
- 238000004364 calculation method Methods 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 229910021645 metal ion Inorganic materials 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 8
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 6
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000012086 standard solution Substances 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a sulfuric acid concentration monitoring system applied to manganese sulfate production, which comprises a light source emitter, a light receiving surface, a spectrum processing center and a concentration calculating module, wherein the light source emitter is used for emitting light rays with various wavelengths, the light rays penetrate through liquid to be detected and are captured by the light receiving surface, the spectrum processing center obtains a spectrogram according to the detection condition of the light receiving surface, and the concentration calculating module calculates the sulfuric acid concentration according to the change condition of the spectrogram. The system detects the change of the concentration of the hydrogen ions based on the different absorption degrees of different ions to light rays with different wavelengths, the detection process is non-contact detection, the influence on the production of manganese sulfate is avoided, and meanwhile, the mode of detecting the change of the concentration of the hydrogen ions is used for replacing the mode of directly detecting the concentration of the hydrogen ions, so that the interference of environmental factors on detection can be reduced to the greatest extent.
Description
Technical Field
The invention relates to the technical field of production control, in particular to a sulfuric acid concentration monitoring system applied to manganese sulfate production.
Background
In the current production of manganese sulfate, a manganese sulfate solution is obtained through a replacement reaction of sulfuric acid and manganese ore, in the process, the control of the amount of sulfuric acid has a great influence on the production efficiency of manganese sulfate, and the premise of controlling the addition amount of sulfuric acid is that the concentration of sulfuric acid can be accurately monitored in real time, but the existing sulfuric acid concentration monitoring system applied to industrial production has the problem of inaccuracy.
A number of sulfuric acid concentration monitoring systems have been developed, and through extensive searching and reference, it has been found that existing monitoring systems have the systems disclosed in publication nos. KR101204649B1, KR101204542B1, CN103335976B and KR100461964B1, and sample cells are selected; preparing standard solution samples with different concentrations; measuring the terahertz time-domain spectrum of the standard solution sample, and establishing a terahertz time-domain spectrum database of the standard solution sample, wherein the database comprises a time-domain spectrogram, a frequency-domain spectrogram, a concentration-absorption coefficient relation spectrogram, a concentration-refractive index relation spectrogram and a concentration-extinction coefficient relation spectrogram of the standard solution sample; measuring the terahertz time-domain spectrum of the solution to be measured, and processing the data to obtain the absorption coefficient of the sample to be measured; and analyzing and measuring the concentration of the solution to be measured according to the terahertz time-domain spectrum database of the standard solution sample. However, the system needs to acquire a sample, so that real-time monitoring cannot be realized, and meanwhile, the measuring process is influenced by environmental factors, and the measuring result may have deviation.
Disclosure of Invention
The invention aims at providing a sulfuric acid concentration monitoring system applied to manganese sulfate production aiming at the defects,
The invention adopts the following technical scheme:
The sulfuric acid concentration monitoring system comprises a light source emitter, a light receiving surface, a spectrum processing center and a concentration calculating module, wherein the light source emitter is used for emitting light rays with various wavelengths, the light rays penetrate through liquid to be detected and are captured by the light receiving surface, the spectrum processing center obtains a spectrogram according to the detection condition of the light receiving surface, and the concentration calculating module calculates the sulfuric acid concentration according to the change condition of the spectrogram;
The spectrum processing center processes a spectrum graph curve I (lambda, 0) in an initial state, and the spectrum graph curve I (lambda, t) is obtained in real time, wherein lambda is the wavelength of light, I is the intensity of light with corresponding wavelength received in unit time, t is real time, a wave band sensitive to hydrogen ion change in the spectrum graph is [ lambda 1,λ2 ], a wave band sensitive to manganese ion change is [ lambda 3,λ4 ], the rest wave bands with the change amplitude smaller than manganese ions and exceeding a threshold value are impurity metal wave bands [ lambda z1,λz2]、[λz3,λz4]、...、[λz(2n-1),λz(2n) ], and n is the type of impurity metal;
The concentration calculation module calculates to obtain the basic light intensity I H1 of the hydrogen ions, the real-time light intensity I H2 of the hydrogen ions, the basic light intensity I M1 of the manganese ions, the real-time light intensity I M2 of the manganese ions and the variation light intensity delta I z of the impurity metals according to the spectrogram, and then calculates to obtain the variation concentration delta H of the hydrogen ions according to the five calculation modes:
Wherein k 1 is the absorption factor of hydrogen ions to [ lambda 1,λ2 ] wave band light, k' 2 is the absorption factor of manganese ions to [ lambda 3,λ4 ] wave band light, and k z is the comprehensive absorption factor of impurity metal ions;
Further, the calculation formula of the basic light intensity I H1 of the hydrogen ion is as follows:
The calculation formula of the real-time light intensity I H2 of the hydrogen ions is as follows:
the calculation formula of the basic light intensity I M1 of the manganese ions is as follows:
The calculation formula of the real-time light intensity I M2 of the manganese ions is as follows:
Further, the threshold value of the impurity metal band is judged to be 6%, and when the existing wavelength lambda satisfies:
I(λ，0)-I(λ，t)>6％*I(λ，0)；
the continuous lambda section corresponds to an impurity metal;
further, the calculation formula of the variation light intensity Δi z of the impurity metal is as follows:
Further, the spectrum processing center generates a spectrum graph curve according to the detection value of an effective area in the light receiving surface, wherein the effective area refers to the area in the light receiving surface, the light passing through the edge of the ore is detected, and the concentration of hydrogen ions of liquid near the ore under the double influences of chemical action and diffusion action can be calculated according to the spectrum graph of the area.
The beneficial effects obtained by the invention are as follows:
The system adopts a non-contact mode to detect sulfuric acid, the detection process does not affect the production of manganese sulfate, concentration change is calculated by analyzing the difference between an initial state spectrogram and a real-time spectrogram, and the system adopts a mode which is slightly influenced by environmental factors and is combined with the initial concentration which can be accurately obtained, the calculated sulfuric acid concentration is more accurate, and the light sensing point adopted by the spectrogram generated by the system is determined after the calculation and brushing, so that the detection is more targeted.
Drawings
The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic diagram of an overall structural framework;
FIG. 2 is a schematic diagram of a spectrogram curve;
FIG. 3 is a schematic diagram of the basal light intensity in the spectrogram;
FIG. 4 is a schematic view of real-time light intensity in a spectrogram;
FIG. 5 is a schematic diagram of the intensity of the variation light in the spectrogram;
FIG. 6 is a schematic diagram showing a partial distribution of the effective area of the photo-sensing spot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following examples thereof; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Other systems, methods, and/or features of the present embodiments will be or become apparent to one with skill in the art upon examination of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or component referred to must have a specific azimuth, construction and operation in which the term is described in the drawings is merely illustrative, and it is not to be construed that the term is limited to the patent, and specific meanings of the term may be understood by those skilled in the art according to specific circumstances.
Embodiment one.
With reference to fig. 1, this embodiment provides a sulfuric acid concentration monitoring system applied to manganese sulfate production, including a light source emitter, a light receiving surface, a spectrum processing center and a concentration calculating module, where the light source emitter is configured to emit light rays containing multiple wavelengths, the light rays penetrate through a liquid to be measured and are captured by the light receiving surface, the spectrum processing center obtains a spectrogram according to a detection condition of the light receiving surface, and the concentration calculating module calculates to obtain a sulfuric acid concentration according to a change condition of the spectrogram;
The spectrum processing center processes a spectrum graph curve I (lambda, 0) in an initial state, and the spectrum graph curve I (lambda, t) is obtained in real time, wherein lambda is the wavelength of light, I is the intensity of light with corresponding wavelength received in unit time, t is real time, a wave band sensitive to hydrogen ion change in the spectrum graph is [ lambda 1,λ2 ], a wave band sensitive to manganese ion change is [ lambda 3,λ4 ], the rest wave bands with the change amplitude smaller than manganese ions and exceeding a threshold value are impurity metal wave bands [ lambda z1,λz2]、[λz3,λz4]、...、[λz(2n-1),λz(2n) ], and n is the type of impurity metal;
The concentration calculation module calculates to obtain the basic light intensity I H1 of the hydrogen ions, the real-time light intensity I H2 of the hydrogen ions, the basic light intensity I M1 of the manganese ions, the real-time light intensity I M2 of the manganese ions and the variation light intensity delta I z of the impurity metals according to the spectrogram, and then calculates to obtain the variation concentration delta H of the hydrogen ions according to the five calculation modes:
Wherein k 1 is the absorption factor of hydrogen ions to [ lambda 1,λ2 ] wave band light, k' 2 is the absorption factor of manganese ions to [ lambda 3,λ4 ] wave band light, and k z is the comprehensive absorption factor of impurity metal ions;
the calculation formula of the basic light intensity I H1 of the hydrogen ions is as follows:
The calculation formula of the real-time light intensity I H2 of the hydrogen ions is as follows:
the calculation formula of the basic light intensity I M1 of the manganese ions is as follows:
The calculation formula of the real-time light intensity I M2 of the manganese ions is as follows:
Judging that the threshold value of the impurity metal band is 6 percent, and when the wavelength lambda is present, the threshold value is as follows:
I(λ，0)-I(λ，t)>6％*I(λ，0)；
the continuous lambda section corresponds to an impurity metal;
The calculation formula of the variation light intensity delta I z of the impurity metal is as follows:
the spectrum processing center generates a spectrogram curve according to the detection value of an effective area in the light receiving surface, wherein the effective area refers to the area in the light receiving surface, the light passing through the edge of the ore is detected, and the concentration of hydrogen ions of liquid near the ore under the double influences of chemical action and diffusion action can be calculated according to the spectrogram of the area.
Embodiment two.
The embodiment includes the whole content of the first embodiment, and the embodiment provides a sulfuric acid concentration monitoring system for manganese sulfate production, which comprises a light source emitter, a light receiving surface, a spectrum processing center and a concentration calculating module, wherein the light source emitter is used for emitting light rays with various wavelengths, the light rays penetrate through liquid to be detected and are captured by the light receiving surface, the spectrum processing center obtains a spectrogram according to the detection condition of the light receiving surface, and the concentration calculating module calculates to obtain the sulfuric acid concentration according to the change condition of the spectrogram;
The light receiving surface, the spectrum processing center and the concentration calculating module are collectively called a detection device, and the detection device and the light source emitter are positioned at two sides of the liquid to be detected;
The liquid to be measured is sulfuric acid, manganese ore is arranged in the liquid to be measured, hydrogen ions in the sulfuric acid react with metal manganese and other impurity metals, the hydrogen ions in the liquid to be measured after the reaction can be reduced, instead of the metal ions, and the concentration of the hydrogen ions in the liquid to be measured reacts with the concentration of sulfuric acid, so that only the concentration of the hydrogen ions is detected;
The system is based on the principle that the absorption amplitude of different metal ions and hydrogen ions to light with different wavelengths is different, and when the light emitted by the emitter is captured by the light receiving surface through the liquid to be detected, the change condition of the hydrogen ions in the liquid can be obtained by analyzing the spectrum with specific wavelength;
Referring to fig. 2, the spectrum graph curve of the light received by the detection device is I (λ), where the independent variable λ is the wavelength of the light, the intensity of the light with the corresponding wavelength received in the unit time is dependent on the variable I, more specifically, the spectrum graph curve detected in the initial state is I (λ, 0), which is called a reference curve, the spectrum graph curve detected in real time is I (λ, t), which is called a real time curve, and t is a real time, the detection device compares the reference curve and the real time curve, wherein the area part with the raised curve is the wavelength of the light corresponding to the hydrogen ion, the wavelength range of the area is denoted as [ λ 1,λ2 ], the area part with the lowered curve is the wavelength of the light corresponding to the manganese ion and other metal ions, the most obvious reduction is the wavelength of the light corresponding to the manganese ion, the wavelength range of the area is denoted as [ λ 3,λ4 ], the wavelength range of the area corresponding to the rest metal ions is denoted as [ λ z1,λz2]、[λz3,λz4]、...、[λz(2n-1),λz(2n) ], and n is the type of impurity metal.
Referring to fig. 3, 4 and 5, the concentration calculation module calculates the base light intensity I H1 of the hydrogen ion portion in the control curve:
The concentration calculation module calculates the basic light intensity I M1 of the manganese ion part in the control curve:
The concentration calculation module calculates the real-time light intensity I H2 of the hydrogen ions in the real-time curve:
the concentration calculation module calculates the real-time light intensity I M2 of the manganese ions in the real-time curve:
The concentration calculation module calculates the variation light intensity delta I z of the impurity metal:
the above variables satisfy the following equation:
IH2-IH1＝k1·ΔH-k2·ΔM-k3·ΔZ; ①
IM1-IM2＝k′2·ΔM+k′3·ΔZ-k′1·ΔH; ②
ΔIz＝kz·ΔZ; ③
Wherein Δh is the concentration variation of hydrogen ions in the solution, Δm is the concentration variation of manganese ions in the solution, Δz is the concentration variation of impurity metal ions in the solution, k 1、k2、k3 is the absorption factor of hydrogen ions, manganese ions and impurity metal ions to [ lambda 1,λ2 ] band light, k 1 is far greater than the absorption factor of k 2 and k 3,k′1、k′2、k′3 is the absorption factor of hydrogen ions, manganese ions and impurity metal ions to [ lambda 3,λ4 ] band light, and k ' 2 is far greater than the comprehensive absorption factor of k ' 1 and k ' 3,kz is impurity metal ions;
because the impurity metal ions have a smaller number than the manganese ions, the relationship between the hydrogen ions, the manganese ions and the impurity metal ions is:
ΔH＝2*ΔM+ΔZ； ④
Adding ① to ② gives:
IH2-IH1+IM1-IM2＝(k1-k′1)·ΔH+(k′2-k2)·ΔM+(k′3-k3)·ΔZ; ⑤
Converting ④ into Then substituting ⑤ formula to obtain:
Substituting ③ into ⑥ to obtain:
Also because k 1 is much larger than k 2 and k 3,k′2 is much larger than k '1 and k' 3,⑦, rewritable:
The light receiving surface is provided with uniformly distributed light sensing points, as part of light rays can directly irradiate on ores and cannot be captured by the light receiving surface when the light emitted by the light source emitter passes through the liquid to be detected, the light intensity received by the light receiving surface is not uniform, an effective area is obtained by analyzing the distribution of detection values of the light sensing points, and a comparison curve and a real-time curve are obtained according to statistics of the light sensing points in the effective area;
the effective area refers to an area in the light receiving surface, wherein the area detects light passing through the edge of the ore, and the concentration of hydrogen ions of liquid near the ore under the double influences of chemical action and diffusion action can be calculated according to a spectrogram of the area;
The light intensity detected by the light sensing points located at coordinates (x, y) on the light receiving surface is I (x, y), and the detecting means calculates a gradation C (x, y) of each light sensing point:
Searching a light sensing point at the position of the maximum gradient, and continuously searching the light sensing point with the maximum gradient in the adjacent area by taking the light sensing point as a datum point, so as to finally obtain a closed curve formed by the searched light sensing points, wherein the closed curve is regarded as projection of the edge of the ore on the light receiving surface;
Calculating average light intensity of light sensing points inside closed curve And average light intensity/>, of light sensing points outside the closed curve
Wherein n in is the number of photo-sensing points in the closed curve, n out is the number of photo-sensing points outside the closed curve, I in (x, y) represents the light intensity detected by the photo-sensing points in the closed curve, and I out (x, y) represents the light intensity detected by the photo-sensing points outside the closed curve;
Calculating average light intensity of light sensing points on closed curve
Wherein n line is the number of photo-sensing points on the closed curve, and I line (x, y) represents the light intensity detected by the photo-sensing points on the closed curve;
calculating the change proportion P of the three average light intensities:
Referring to fig. 6, a set of photo-sensing points located outside the closed curve and having a coordinate distance not exceeding Q is an effective area, and the value of Q is:
wherein U is a basic value and can be directly set in the system;
For example, the coordinate distance between the point (x 1,y1) and the point (x 2,y2) is |x 1-x2|+|y1+y2 |.
While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems and devices discussed above are examples. Various configurations may omit, replace, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in a different order than described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. Furthermore, as the technology evolves, elements therein may be updated, i.e., many of the elements are examples, and do not limit the scope of the disclosure or the claims.
Specific details are given in the description to provide a thorough understanding of exemplary configurations involving implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring configurations. This description provides only an example configuration and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configuration will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is intended that it be regarded as illustrative rather than limiting. Various changes and modifications to the present invention may be made by one skilled in the art after reading the teachings herein, and such equivalent changes and modifications are intended to fall within the scope of the invention as defined in the appended claims.
Claims (2)
1. The sulfuric acid concentration monitoring system is characterized by comprising a light source emitter, a light receiving surface, a spectrum processing center and a concentration calculating module, wherein the light source emitter is used for emitting light rays with various wavelengths, the light rays penetrate through liquid to be detected and are captured by the light receiving surface, the spectrum processing center obtains a spectrogram according to the detection condition of the light receiving surface, and the concentration calculating module calculates the sulfuric acid concentration according to the change condition of the spectrogram;
The spectrum processing center processes a spectrum graph curve I (lambda, 0) in an initial state, and the spectrum graph curve I (lambda, t) is obtained in real time, wherein lambda is the wavelength of light, I is the intensity of light with corresponding wavelength received in unit time, t is real time, a wave band sensitive to hydrogen ion change in the spectrum graph is [ lambda 1,λ2 ], a wave band sensitive to manganese ion change is [ lambda 3,λ4 ], the rest wave bands with the change amplitude smaller than manganese ions and exceeding a threshold value are impurity metal wave bands [ lambda z1,λz2]、[λz3,λz4]、...、[λz(2n-1),λz(2n) ], and n is the type of impurity metal;
The concentration calculation module calculates to obtain the basic light intensity I H1 of the hydrogen ions, the real-time light intensity I H2 of the hydrogen ions, the basic light intensity I M1 of the manganese ions, the real-time light intensity I M2 of the manganese ions and the change light intensity delta I z of the impurity metals according to the spectrogram, and then calculates to obtain the change concentration delta H of the hydrogen ions:
Wherein k 1 is the absorption factor of hydrogen ions to [ lambda 1,λ2 ] wave band light, k' 2 is the absorption factor of manganese ions to [ lambda 3,λ4 ] wave band light, and k z is the comprehensive absorption factor of impurity metal ions;
the calculation formula of the basic light intensity I H1 of the hydrogen ions is as follows:
The calculation formula of the real-time light intensity I H2 of the hydrogen ions is as follows:
the calculation formula of the basic light intensity I M1 of the manganese ions is as follows:
The calculation formula of the real-time light intensity I M2 of the manganese ions is as follows:
Judging that the threshold value of the impurity metal band is 6 percent, and when the wavelength lambda is present, the threshold value is as follows:
I(λ，0)-I(λ，t)>6％*I(λ，0)；
The interval formed by the continuous lambda corresponds to one impurity metal;
The calculation formula of the variation light intensity delta I z of the impurity metal is as follows:
2. a sulfuric acid concentration monitoring system applied to manganese sulfate production according to claim 1, wherein the spectrum processing center generates a spectrogram curve according to a detection value of an effective area in the light receiving surface, the effective area refers to an area in the light receiving surface, the light passing through the edge of the ore is detected, and the concentration of hydrogen ions of liquid near the ore under the double effects of chemical action and diffusion action can be calculated according to the spectrogram of the area.
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