CN110864998A - Method for testing salt content of crude salt - Google Patents
Method for testing salt content of crude salt Download PDFInfo
- Publication number
- CN110864998A CN110864998A CN201911190416.3A CN201911190416A CN110864998A CN 110864998 A CN110864998 A CN 110864998A CN 201911190416 A CN201911190416 A CN 201911190416A CN 110864998 A CN110864998 A CN 110864998A
- Authority
- CN
- China
- Prior art keywords
- salt
- crude salt
- solution
- crude
- cylindrical container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
-
- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
Abstract
The invention discloses a method for testing the salt content of crude salt, which relates to the field of salt preparation and comprises the following steps: firstly, starting a first light, starting a first driving motor and driving an annular table-board to rotate, and continuously acquiring the projection height of the first light projected on a light receiving module at intervals; then, according to the projection height, the refractive index of the first crude salt test solution is solved; then, according to a preset refractive index/concentration curve and the refractive index of the first crude salt test solution, converting the solution concentration evaluation value of the first crude salt solution, and solving the relative salt content of the crude salt relative to the standard refined salt; and finally, outputting whether the salt content of the crude salt is qualified or not and the salt content according to the relative salt content. According to the method, the refractive index of the first crude salt test solution is solved by measuring the projection height of light, the solution concentration evaluation value and the relative salt content of the first crude salt solution are converted, the salt content of the crude salt is output, and the quality of the crude salt is effectively evaluated.
Description
Technical Field
The invention relates to the field of salt production, in particular to a method for testing the salt content of crude salt.
Background
In the prior art, the salinity of crude salt is generally determined by the Morel method, i.e. in K2CrO4For indicators, AgNO3Chloride was titrated against the standard solution. Due to the solubility of AgCl<Ag2CrO4So that the AgCl precipitate first precipitates out of the solution and, when the end point is reached, the excess AgNO3With CrO4 2-A brick-red precipitate is formed.
On one hand, the method is a destructive method, and the test solution can not be made into refined salt again; on the other hand, the brick red precipitation is manually identified, and after the AgCl precipitation is finished, the titration cannot be stopped at the first time to cause the influence on the precision due to the excessive dropping.
Disclosure of Invention
In view of a part of the defects in the prior art, the technical problem to be solved by the present invention is to provide a method for testing the salt content of crude salt, aiming at providing a new method for testing the salt content of crude salt, wherein the crude salt solution used in the method is not polluted and can be made into refined salt again, and the convenience of the salt content test is improved by adopting an optical scheme.
In order to achieve the above object, the present invention provides a method for testing salt content of crude salt, comprising:
turning on a first light in response to the first cylindrical container having received therein a first crude salt test solution; wherein the first cylindrical container is for holding a first crude salt test solution; the bottom of the first cylindrical container is provided with a first reflector; an annular test carrying track is arranged on the periphery of the first cylindrical container, and the annular test carrying track is coaxial with the first cylindrical container; an annular table top is mounted on the annular test carrying track, and a light emitting module and a light receiving module are mounted on the annular table top; the light emitting module is directed to the surface of the first crude salt test solution in the first cylindrical container; the light emitting module is higher than the first cylindrical container, and the light receiving module is higher than the first cylindrical container; the light emitting module and the light receiving module are axially symmetrical to the central axis of the annular test carrying track; the light emitting module is used for emitting the first light, refracting the first crude salt testing solution in the first cylindrical container and reflecting the first light from the bottom of the first cylindrical container, and transmitting the first light to the light receiving module;
starting a first driving motor and driving the annular table-board to rotate, and continuously collecting the projection height H of the first light projected on the light receiving module at intervalsi(ii) a The i is the serial number of the sampling data; the first driving motor is used for driving the annular table top to rotate around a central axis of the annular test carrying track on the annular test carrying track; the light receiving surface of the light receiving module is vertical to the ground plane;
according to the projection heightDegree HiSolving for the refractive index n of the first crude salt test solutionc(ii) a The refractive index ncSatisfies the following conditions:
α is the included angle between the direction of the light emitting module and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module and the light receiving module, h is the height difference h between the light emitting module and the liquid level of the first crude salt test solution, and the projection height
Is the height difference H between the projection point of the first light on the light receiving module and the liquid level of the first crude salt test solutioniD is the solution depth of the first crude salt test solution;
according to a predetermined refractive index/concentration curve and the refractive index n of the first crude salt test solutioncConverting the solution concentration estimated value w of the first crude salt solution and solving the relative salt content η of the crude salt relative to the standard refined salt
M iscyAdding mass of crude salt for the first crude salt test solution, mwAdding mass to the pure water of the first crude salt test solution;
in response to the relative salt content η being in a first range (η)low,ηhigh) If yes, outputting a salt content of the crude salt as ηξ, and responding to the relative salt content being in the first range (η)low,ηhigh) Otherwise, outputting unqualified crude salt, wherein the salt content of the crude salt is ηξ, and the salt content of the refined salt is ξ.
In the technical scheme, the light emitting module and the light receiving module are carried, and the carrying positions and the solution liquid level position of the light emitting module and the light receiving module are used for realizing the purpose of improving the quality of the solutionThe method comprises the steps of solving the refractive index of a solution, and evaluating the concentration of the solution according to the concentration of the solution and the refractive index relation so as to evaluate the quality of crude salt, wherein an annular test carrying track is arranged in the technical scheme, a light emitting module and a light receiving module are carried on an annular table top and can surround a first cylindrical container so as to measure the average refractive index of the solution in the first cylindrical container from different directions and reduce the problem that the refractive index is inaccurate to detect due to the fact that the concentration of each region is not used, and in the technical scheme, the method comprises the steps of measuring the average refractive index of the solution in the first cylindrical container from different directions, and measuring the horizontal distance e between the light emitting module and the light receiving module, the height difference H between the light emitting module and the liquid level of the first crude salt test solution and the height difference H between the projection point of first light on the light receiving module and the liquid level of the first crude salt test solution through the included angle α between the directioniAnd the solution depth d of the first crude salt test solution to solve the solution refractive index by adopting a formula
The overall refractive index solving speed is high; in addition, the crude salt solution used in the technical scheme is not polluted and can be made into refined salt again, and the optical scheme is adopted to improve the convenience of salt content test.
In a specific embodiment, the method further comprises:
acquiring the projection heights H at successive intervalsiDuring the process, the water temperature of the first crude salt test solution was controlled at 25 ℃.
In a specific embodiment, the concentration of the first crude salt test solution is less than its saturation concentration at the current temperature.
In a specific embodiment, a gap exists between the first cylindrical container and the annular test staging track.
In the technical scheme, the gap is formed between the first cylindrical container and the annular test carrying track, so that the first cylindrical container is prevented from being in direct contact with the annular test carrying track, and the solution liquid level in the first cylindrical container is prevented from fluctuating to influence the solving precision of the refractive index when the annular table top on the annular test carrying track moves.
In a specific embodiment, the method further comprises: and controlling a first stirring device to stir the first crude salt test solution.
In this technical scheme, through setting up scalable agitating unit, be convenient for carry out the misce bene to first crude salt test solution.
In a specific embodiment, the method further comprises:
controlling the liquid temperature to be 25 ℃, and placing the prepared saturated standard salt solution into the first cylindrical container;
continuously increasing pure water at intervals for dilution, and recording the standard refractive index of the diluted standard salt solution at each concentration;
fitting the refractive index/concentration curve according to the standard refractive index of the standard salt solution at each concentration.
In the technical scheme, a refractive index/concentration curve is obtained by measuring and calculating the standard refractive index under each concentration in advance, so that the solution concentration can be obtained according to the refractive index contrast when crude salt is detected.
In a specific embodiment, the method further comprises: the solution depth d of the first crude salt test solution is collected by means of a level sensor arranged on the wall of the first cylindrical container.
In a specific embodiment, the first reflecting mirror is a single mirror, and a reflecting surface of the single mirror faces to one side of the first crude salt test solution; the single-face mirror is directly plated on the bottom of the first cylindrical container in a film plating mode.
According to the technical scheme, the single-face mirror is directly plated at the bottom of the first cylindrical container, so that the influence of deflection of an optical path caused by the thickness of the reflector is reduced, the accuracy of solving the refractive index of the first crude salt test solution is improved, and the system precision is improved.
In a specific embodiment, the method further comprises: obtaining a mass mcyCrude salt of (2) and mass mwThe first crude salt test solution is prepared.
The invention has the beneficial effects that 1) in the invention, a light emitting module and a light receiving module are carried, the refractive index of the solution is solved according to the carrying positions of the light emitting module and the light receiving module and the liquid level position of the solution, the concentration of the solution is evaluated according to the concentration of the solution and the refractive index relation, so as to evaluate the quality of crude salt, 2) in the invention, an annular test carrying track is arranged, the light emitting module and the light receiving module are carried on an annular table top and can surround a first cylindrical container, so that the average refractive index of the solution in the first cylindrical container can be measured from different directions, and the problem of inaccurate refractive index detection caused by the fact that the concentration of each region is not used is reduced, 3) in the invention, the height difference H between the light emitting module and the liquid level of the first crude salt test solution and the liquid level H of the first light on the light receiving module is obtained through the included angle α between the pointing direction of the light emitting module and the liquid level normal of the first crude salt test solution, the horizontal distance e between the light emitting module and the light receiving module, the height difference HiAnd the solution depth d of the first crude salt test solution to solve the solution refractive index by adopting a formula
The overall refractive index solving speed is high; in addition, the crude salt solution used in the invention is not polluted and can be made into refined salt again, and an optical scheme is adopted to improve the convenience of the salt content test.
Drawings
FIG. 1 is a schematic flow chart of a crude salt salinity test method in accordance with one embodiment of the present invention;
FIG. 2 is a system block diagram of a crude salt quality detection system in an embodiment of the present invention;
FIG. 3 is a graph of the relationship between the position of the first cylindrical vessel and the annular table of a crude salt salinity test method in accordance with an embodiment of the present invention;
FIG. 4 is an optical diagram illustrating refractive index resolution in a crude salt salinity test method in accordance with an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in a first embodiment of the present invention, as shown in fig. 1-4, there is provided a crude salt salinity test method, comprising:
turning on a first light in response to the first cylindrical container having received therein a first crude salt test solution; wherein the first cylindrical container is for holding a first crude salt test solution; the bottom of the first cylindrical container is provided with a first reflector; an annular test carrying track is arranged on the periphery of the first cylindrical container, and the annular test carrying track is coaxial with the first cylindrical container; an annular table top is mounted on the annular test carrying track, and a light emitting module and a light receiving module are mounted on the annular table top; the light emitting module is directed to the surface of the first crude salt test solution in the first cylindrical container; the light emitting module is higher than the first cylindrical container, and the light receiving module is higher than the first cylindrical container; the light emitting module and the light receiving module are axially symmetrical to the central axis of the annular test carrying track; the light emitting module is used for emitting the first light, refracting the first crude salt testing solution in the first cylindrical container and reflecting the first light from the bottom of the first cylindrical container, and transmitting the first light to the light receiving module;
starting a first driving motor and driving the annular table-board to rotate, and continuously collecting the projection height H of the first light projected on the light receiving module at intervalsi(ii) a The i is the serial number of the sampling data; the first driving motor is used for driving the annular table top to rotate around a central axis of the annular test carrying track on the annular test carrying track; the light receiving surface of the light receiving module is vertical to the ground plane;
according to the projection height HiSolving for the refractive index n of the first crude salt test solutionc(ii) a The refractive index ncSatisfies the following conditions:
α is the included angle between the direction of the light emitting module and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module and the light receiving module, h is the height difference h between the light emitting module and the liquid level of the first crude salt test solution, and the projection height
Is the height difference H between the projection point of the first light on the light receiving module and the liquid level of the first crude salt test solutioniD is the solution depth of the first crude salt test solution;
according to a predetermined refractive index/concentration curve and the refractive index n of the first crude salt test solutioncConverting the solution concentration estimated value w of the first crude salt solution and solving the relative salt content η of the crude salt relative to the standard refined salt
M iscyAdding mass of crude salt for the first crude salt test solution, mwAdding mass to the pure water of the first crude salt test solution;
in response to the relative salt content η being in a first range (η)low,ηhigh) If yes, outputting a salt content of the crude salt as ηξ, and responding to the relative salt content being in the first range (η)low,ηhigh) Otherwise, outputting unqualified crude salt, wherein the salt content of the crude salt is ηξ, and the salt content of the refined salt is ξ.
The light emitting module and the light receiving module are carried in the embodiment, the solution refractive index is solved according to the carrying positions of the light emitting module and the light receiving module and the liquid level position of the solution, and the solution concentration is evaluated according to the relationship between the solution concentration and the refractive index so as to evaluate the quality of crude salt; in this embodiment, the light emitting module and the light receiving module are mounted on the ring by being provided with the annular test carrying trackThe measuring device comprises a light emitting module, a light receiving module, a light emitting module, a first cylindrical container, a second cylindrical container, a light receiving module and a control module, wherein the light emitting module is arranged on a table surface and can surround the first cylindrical container so as to measure the average refractive index of the solution in the first cylindrical container from different directions and reduce the problem of inaccurate refractive index detection caused by the fact that the concentration of each region is not used, and in the implementation, the included angle α between the direction of the light emitting module and the normal line of the liquid surface of the first crude salt test solution, the horizontal distance e between the light emitting module and the light receiving module, the height difference H between the light emitting module and the liquid surface of the first crude salt test solution andiand the solution depth d of the first crude salt test solution to solve the solution refractive index by adopting a formula
The overall refractive index solving speed is high.
The derivation of the equation for solving the refractive index of the first crude salt test solution in this application is described below. As can be taken from fig. 4:
α is the included angle between the direction of the light emitting module and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module and the light receiving module, h is the height difference h between the light emitting module and the liquid level of the first crude salt test solution, and the projection height
Is the height difference H between the projection point of the first light on the light receiving module and the liquid level of the first crude salt test solutioniA is the horizontal distance between the first light ray inlet water point and the light ray emitting module, b is the horizontal distance between the first light ray outlet water point and the light ray receiving module, c is half of the horizontal distance of the first light ray in the water, and β is the horizontal distance of the first light ray in the waterAngle of refraction.
The following formulae (1) to (5) can be given:
the derivation is simplified to obtain:
optionally, in order to unify variables, the water temperature is set to 25 ℃; in this embodiment, the method further includes:
acquiring the projection heights H at successive intervalsiDuring the process, the water temperature of the first crude salt test solution was controlled at 25 ℃.
It is worth mentioning that the concentration of the first crude salt test solution is less than its saturation concentration at the current temperature.
In this embodiment, a gap exists between the first cylindrical container and the annular test mounting rail. Namely, through having the clearance between first cylinder container and annular test carrying rail, avoid first cylinder container and annular test carrying rail direct contact, cause the solution liquid level fluctuation in the first cylinder container and influence the solution precision of refracting index when avoiding annular mesa on the annular test carrying rail to move.
In this embodiment, the method further includes: and controlling a first stirring device to stir the first crude salt test solution. Through setting up scalable agitating unit, be convenient for carry out the misce bene to first crude salt test solution promptly.
In this embodiment, the method further includes:
controlling the liquid temperature to be 25 ℃, and placing the prepared saturated standard salt solution into the first cylindrical container;
continuously increasing pure water at intervals for dilution, and recording the standard refractive index of the diluted standard salt solution at each concentration;
fitting the refractive index/concentration curve according to the standard refractive index of the standard salt solution at each concentration.
This example obtained a refractive index/concentration curve by measuring the standard refractive index at each concentration in advance, so that the solution concentration could be obtained from the refractive index control at the time of crude salt detection.
In this embodiment, the method further includes: the solution depth d of the first crude salt test solution is collected by means of a level sensor arranged on the wall of the first cylindrical container.
It should be noted that, when the light emitting module emits the first light, the first light can be refracted by the first coarse salt test solution in the first cylindrical container and reflected by the bottom of the first cylindrical container, and is transmitted through the light receiving module without being blocked by other components.
It is worth mentioning that in the present application, the refractive index is the relative refractive index, i.e. assuming an air refractive index of 1, the refractive index of the first crude salt test solution is nc. Further, in the present application, solution concentration refers to the percent concentration of the solution, i.e., to the percentage of the weight of solute contained in the solution.
In this embodiment, the first reflecting mirror is a single-sided mirror, and a reflecting surface of the single-sided mirror faces one side of the first crude salt test solution; the single-face mirror is directly plated on the bottom of the first cylindrical container in a film plating mode. In the embodiment, the single-face mirror is directly plated at the bottom of the first cylindrical container, so that the influence of deflection of an optical path caused by the thickness of the reflector is reduced, the accuracy of solving the refractive index of the first crude salt test solution is improved, and the system precision is improved.
In this embodiment, the method further includes: obtaining a mass mcyCrude salt of (2) and mass mwThe first crude salt test solution is prepared.
In a second embodiment of the present invention, as shown in fig. 1-4, there is provided a crude salt quality detection system, the system comprising:
a first cylindrical container 101; the first cylindrical container 101 is used for containing a first crude salt test solution; the bottom of the first cylindrical container 101 is provided with a first reflector 102;
an annular test carrying rail 103 arranged on the periphery of the first cylindrical container 101; the annular test carrying track 103 is coaxial with the first cylindrical container 101;
an annular table 104 mounted on the annular test mounting rail 103;
a light emitting module 105 mounted on the annular table 104; the light emitting module 105 is directed at the surface of the first crude salt test solution in the first cylindrical container 101; the light emitting module 105 is higher than the first cylindrical container 101;
a light receiving module 106 mounted on the annular table 104; the light receiving module 106 is higher than the first cylindrical container 101;
a first drive motor 107; the first driving motor 107 is configured to drive the annular table top 104 to rotate on the annular test carrying track 103 around a central axis of the annular test carrying track 103;
and a main controller 200;
wherein, the light receiving surface of the light receiving module 106 is perpendicular to the ground plane; the light emitting module 105 and the light receiving module 106 are axisymmetrical to the central axis of the annular test carrying track 103; the light emitting module 105 is configured to emit a first light, which is refracted by the first crude salt test solution in the first cylindrical container 101 and reflected by the bottom of the first cylindrical container 101, and is transmitted through the light receiving module 106;
the main controller 200 includes:
a light source turning-on module 201, configured to turn on the first light in response to the first cylindrical container 101 already containing the first crude salt test solution;
a projection height acquisition module 202, configured to start the first driving motor 107 and drive the annular table 104 to rotate, and acquire the projection height H of the first light projected on the light receiving module 106 at consecutive intervalsi(ii) a The i is the serial number of the sampling data;
a refractive index solving module 203 for solving the refractive index according to the projection heightDegree HiSolving for the refractive index n of the first crude salt test solutionc(ii) a The refractive index ncSatisfies the following conditions:
α is an included angle between the direction of the light emitting module 105 and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module 105 and the light receiving module 106, h is the height difference h between the light emitting module 105 and the liquid level of the first crude salt test solution, and the projection height is
Is the height difference H between the projection point of the first light on the light receiving module 106 and the liquid level of the first crude salt test solutioniD is the solution depth of the first crude salt test solution;
a crude salt evaluation module 204 for evaluating the refractive index n of the first crude salt test solution according to a preset refractive index/concentration curvecConverting the solution concentration estimated value w of the first crude salt solution and solving the relative salt content η of the crude salt relative to the standard refined salt
M iscyAdding mass of crude salt for the first crude salt test solution, mwAdding mass to the pure water of the first crude salt test solution;
a crude salt evaluation module 205 to respond to the relative salt content η being in a first range (η)low,ηhigh) If yes, outputting a salt content of the crude salt as ηξ, and responding to the relative salt content being in the first range (η)low,ηhigh) Otherwise, outputting unqualified crude salt, wherein the salt content of the crude salt is ηξ, and the salt content of the refined salt is ξ.
In the present embodiment, the light emitting module 1 is mounted05 and a light receiving module 106, which are used for solving the refractive index of the solution according to the carrying positions of the light emitting module 105 and the light receiving module 106 and evaluating the concentration of the solution according to the concentration of the solution and the refractive index relation so as to evaluate the quality of crude salt, in the embodiment, an annular test carrying track 103 is arranged, the light emitting module 105 and the light receiving module 106 are carried on an annular table-board 104 and can surround the first cylindrical container 101 so as to measure the average refractive index of the solution in the first cylindrical container 101 from different directions and reduce the problem of inaccurate detection of the refractive index caused by the concentration of each area being not used, in the embodiment, an included angle α between the direction of the light emitting module 105 and the normal line of the first crude salt test solution, a horizontal distance e between the light emitting module 105 and the light receiving module 106, a height difference H between the light emitting module 105 and the liquid level of the first crude salt test solution, and a height difference H between the projection point of the first light on the light receiving module 106 and the liquid level of the first crude salt test solution are measured by theiAnd the solution depth d of the first crude salt test solution to solve the solution refractive index by adopting a formula
The overall refractive index solving speed is high.
The derivation of the equation for solving the refractive index of the first crude salt test solution in this application is described below. As can be taken from fig. 4:
α is an included angle between the direction of the light emitting module 105 and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module 105 and the light receiving module 106, h is the height difference h between the light emitting module 105 and the liquid level of the first crude salt test solution, and the projection height is
For the first light ray on the light receiving module 106To the liquid level of the first crude salt test solutioniA is the horizontal distance between the first light ray entry point and the light ray emitting module 105, b is the horizontal distance between the first light ray exit point and the light ray receiving module 106, c is half of the horizontal distance of the first light ray in water, and β is the refraction angle of the first light ray when entering water.
The following formulae (1) to (5) can be given:
the derivation is simplified to obtain:
optionally, in order to unify variables, the water temperature is set to 25 ℃; in this embodiment, the system further comprises a water temperature control module for controlling the water temperature of the first crude salt test solution to be 25 ℃.
It is worth mentioning that the concentration of the first crude salt test solution is less than its saturation concentration at the current temperature.
In this embodiment, there is a gap between the first cylindrical container 101 and the annular test carrying track 103.
That is, by having a gap between the first cylindrical container 101 and the annular test carrying rail 103, the first cylindrical container 101 is prevented from directly contacting the annular test carrying rail 103, and the solution level in the first cylindrical container 101 is prevented from fluctuating to affect the solving accuracy of the refractive index when the annular table 104 on the annular test carrying rail 103 moves.
In this embodiment, the system further includes: a retractable stirring device 108 disposed above the first cylindrical container 101; when the retractable stirring device 108 is extended, the stirring part of the stirring device extends to be below the liquid level of the first crude salt test solution in the first cylindrical container 101; the first stirring device is used for stirring the first crude salt test solution. By providing the retractable stirring device 108, the first crude salt test solution is conveniently and uniformly mixed.
In this embodiment, the system further comprises a refractive index/concentration curve presetting module 300; the refractive index/concentration curve presetting module 300 includes:
the standard solution preparation unit 301 is used for controlling the solution temperature to be 25 ℃, and placing the prepared saturated standard salt solution into the first cylindrical container 101;
a data recording unit 302 for successively adding pure water dilution at intervals and recording the standard refractive index of the diluted standard salt solution at each concentration;
a curve fitting unit 303, configured to fit the refractive index/concentration curve according to the standard refractive index of the standard salt solution at each concentration. The refractive index/concentration curve was obtained by measuring the standard refractive index at each concentration in advance, so that the solution concentration could be obtained from the refractive index control at the time of crude salt detection.
In this embodiment, the system further includes: a liquid level sensor 109 disposed on the wall of the first cylindrical vessel 101; the level sensor 109 is used to collect the solution depth d of the first crude salt test solution.
It should be noted that when the light emitting module 105 emits the first light, the first light can be refracted by the first crude salt test solution in the first cylindrical container 101 and reflected by the bottom of the first cylindrical container 101, and is transmitted through the light receiving module 106 without being blocked by other components.
It is worth mentioning that in the present application, the refractive index is the relative refractive index, i.e. assuming an air refractive index of 1, the refractive index of the first crude salt test solution is nc. Further, in the present application, solution concentration refers to the percent concentration of the solution, i.e., to the percentage of the weight of solute contained in the solution.
Preferably, the first reflecting mirror 102 is a single-sided mirror, and a reflecting surface of the single-sided mirror faces one side of the first crude salt test solution; the single-sided mirror is directly plated on the bottom of the first cylindrical container 101 in a film plating manner. By directly plating the single-sided mirror at the bottom of the first cylindrical container 101, the influence of deflection of an optical path caused by the thickness of the reflecting mirror is reduced, the accuracy of solving the refractive index of the first crude salt test solution is improved, and the system precision is improved.
In this embodiment, the system further includes:
a weighing module 110 for weighing a mass mcyCrude salt of (2) and mass mwAnd preparing the first crude salt test solution.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A method for testing the salt content of crude salt is characterized by comprising the following steps:
turning on a first light in response to the first cylindrical container having received therein a first crude salt test solution; wherein the first cylindrical container is for holding a first crude salt test solution; the bottom of the first cylindrical container is provided with a first reflector; an annular test carrying track is arranged on the periphery of the first cylindrical container, and the annular test carrying track is coaxial with the first cylindrical container; an annular table top is mounted on the annular test carrying track, and a light emitting module and a light receiving module are mounted on the annular table top; the light emitting module is directed to the surface of the first crude salt test solution in the first cylindrical container; the light emitting module is higher than the first cylindrical container, and the light receiving module is higher than the first cylindrical container; the light emitting module and the light receiving module are axially symmetrical to the central axis of the annular test carrying track; the light emitting module is used for emitting the first light, refracting the first crude salt testing solution in the first cylindrical container and reflecting the first light from the bottom of the first cylindrical container, and transmitting the first light to the light receiving module;
starting a first driving motor and driving the annular table-board to rotate, and continuously collecting the projection height H of the first light projected on the light receiving module at intervalsi(ii) a The i is the serial number of the sampling data; the first driving motor is used for driving the annular table top to rotate around a central axis of the annular test carrying track on the annular test carrying track; the light receiving surface of the light receiving module is vertical to the ground plane;
according to the projection height HiSolving for the refractive index n of the first crude salt test solutionc(ii) a The refractive index ncSatisfies the following conditions:
α is the included angle between the direction of the light emitting module and the normal line of the liquid level of the first crude salt test solution, e is the horizontal distance between the light emitting module and the light receiving module, h is the height difference h between the light emitting module and the liquid level of the first crude salt test solution, and the projection height
Is the height difference H between the projection point of the first light on the light receiving module and the liquid level of the first crude salt test solutioniD is the solution depth of the first crude salt test solution;
according to a predetermined refractive index/concentration curve and the refractive index n of the first crude salt test solutioncConverting the solution concentration estimated value w of the first crude salt solution and solving the relative salt content η of the crude salt relative to the standard refined salt
M iscyFor the first crude salt test solutionMass of crude salt added, said mwAdding mass to the pure water of the first crude salt test solution;
in response to the relative salt content η being in a first range (η)low,ηhigh) If yes, outputting a salt content of the crude salt as ηξ, and responding to the relative salt content being in the first range (η)low,ηhigh) Otherwise, outputting unqualified crude salt, wherein the salt content of the crude salt is ηξ, and the salt content of the refined salt is ξ.
2. The method for testing the salt content of the crude salt according to claim 1, further comprising:
acquiring the projection heights H at successive intervalsiDuring the process, the water temperature of the first crude salt test solution was controlled at 25 ℃.
3. The crude salt salinity test method of claim 1, wherein the concentration of said first crude salt test solution is less than its saturation concentration at the current temperature.
4. The method of claim 1, wherein a gap exists between the first cylindrical container and the annular test carrying track.
5. The method for testing the salt content of the crude salt according to claim 1, further comprising: and controlling a first stirring device to stir the first crude salt test solution.
6. The method for testing the salt content of the crude salt according to claim 1, further comprising:
controlling the liquid temperature to be 25 ℃, and placing the prepared saturated standard salt solution into the first cylindrical container;
continuously increasing pure water at intervals for dilution, and recording the standard refractive index of the diluted standard salt solution at each concentration;
fitting the refractive index/concentration curve according to the standard refractive index of the standard salt solution at each concentration.
7. The method for testing the salt content of the crude salt according to claim 1, further comprising: the solution depth d of the first crude salt test solution is collected by means of a level sensor arranged on the wall of the first cylindrical container.
8. The method for testing the salt content of the crude salt according to claim 1, wherein the first reflecting mirror is a single mirror, and the reflecting surface of the single mirror faces to one side of the first crude salt test solution; the single-face mirror is directly plated on the bottom of the first cylindrical container in a film plating mode.
9. The method for testing the salt content of the crude salt according to claim 1, further comprising: obtaining a mass mcyCrude salt of (2) and mass mwThe first crude salt test solution is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190416.3A CN110864998A (en) | 2019-11-28 | 2019-11-28 | Method for testing salt content of crude salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190416.3A CN110864998A (en) | 2019-11-28 | 2019-11-28 | Method for testing salt content of crude salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110864998A true CN110864998A (en) | 2020-03-06 |
Family
ID=69657397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911190416.3A Pending CN110864998A (en) | 2019-11-28 | 2019-11-28 | Method for testing salt content of crude salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110864998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033930A (en) * | 2020-08-22 | 2020-12-04 | 蛤老大（福建）食品有限公司 | Concentrated clam dew and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06288914A (en) * | 1991-11-11 | 1994-10-18 | F M T:Kk | Salt content detecting sensor and salt content detecting method |
| EP0827192A2 (en) * | 1996-09-02 | 1998-03-04 | Murata Manufacturing Co., Ltd. | Method of measuring carrier concentration of semiconductor, process of manufacturing semiconductor device and semiconductor wafer |
| US7998513B1 (en) * | 2007-07-10 | 2011-08-16 | Primordial Diagnostics, Inc. | Ascorbate monitoring and control system |
| CN102798612A (en) * | 2012-08-08 | 2012-11-28 | 李朝晖 | Device and method for measuring refractive index by using orthogonal frequency division multiplexing (OFDM) signal |
| CN104198436A (en) * | 2014-09-17 | 2014-12-10 | 安徽理工大学 | Detection system and detection method for concentration of light-transparent liquid |
| CN204556500U (en) * | 2015-05-04 | 2015-08-12 | 西京学院 | A kind of based on sharp light-struck device for measuring refractive index of transparent liquid |
| CN106959274A (en) * | 2017-05-12 | 2017-07-18 | 燕山大学 | A kind of solution concentration monitoring method and device based on Brewster's law |
| CN108479490A (en) * | 2018-03-16 | 2018-09-04 | 溢通环保科技（莆田）有限公司 | A kind of urea for vehicle solution production control method |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
-
2019
- 2019-11-28 CN CN201911190416.3A patent/CN110864998A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06288914A (en) * | 1991-11-11 | 1994-10-18 | F M T:Kk | Salt content detecting sensor and salt content detecting method |
| EP0827192A2 (en) * | 1996-09-02 | 1998-03-04 | Murata Manufacturing Co., Ltd. | Method of measuring carrier concentration of semiconductor, process of manufacturing semiconductor device and semiconductor wafer |
| US7998513B1 (en) * | 2007-07-10 | 2011-08-16 | Primordial Diagnostics, Inc. | Ascorbate monitoring and control system |
| CN102798612A (en) * | 2012-08-08 | 2012-11-28 | 李朝晖 | Device and method for measuring refractive index by using orthogonal frequency division multiplexing (OFDM) signal |
| CN104198436A (en) * | 2014-09-17 | 2014-12-10 | 安徽理工大学 | Detection system and detection method for concentration of light-transparent liquid |
| CN204556500U (en) * | 2015-05-04 | 2015-08-12 | 西京学院 | A kind of based on sharp light-struck device for measuring refractive index of transparent liquid |
| CN106959274A (en) * | 2017-05-12 | 2017-07-18 | 燕山大学 | A kind of solution concentration monitoring method and device based on Brewster's law |
| CN108479490A (en) * | 2018-03-16 | 2018-09-04 | 溢通环保科技（莆田）有限公司 | A kind of urea for vehicle solution production control method |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033930A (en) * | 2020-08-22 | 2020-12-04 | 蛤老大（福建）食品有限公司 | Concentrated clam dew and preparation method thereof |
| CN112033930B (en) * | 2020-08-22 | 2024-03-26 | 蛤老大（福建）食品有限公司 | Concentrated clams juice and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2013142440A (en) | METHOD AND DEVICE FOR DETECTING DEFECTS IN DISTRIBUTION OF MATERIAL OF A TRANSPARENT CONTAINER | |
| CN105758345B (en) | A kind of x-ray fluorescence imaging device of on-line measurement strip coating thickness | |
| NO152335B (en) | HOLE Centrifuge for FIBERATION OF THERMOPLASTIC MATERIAL | |
| CN110208199A (en) | One kind can be used for the device and method of ultraviolet in on-line determination water-visible absorption spectra | |
| CN110864998A (en) | Method for testing salt content of crude salt | |
| RU2599410C1 (en) | Method for measuring height of transparent liquid level and device for its implementation | |
| US20200158555A1 (en) | Liquid level detection system and liquid level detection method | |
| CN110864999A (en) | Coarse salt quality detection system | |
| CN111323360B (en) | Image acquisition equipment and detection device for particles in liquid | |
| WO2019154187A1 (en) | Novel level gauge with i angle detection function | |
| CN210720179U (en) | Rechecking camera focusing and ranging device and glass rechecking equipment | |
| CN108458993A (en) | Sediment measuring apparatus for reflection index and measurement method | |
| US3306157A (en) | Turbidimeter for sensing the turbidity of a continuously flowing sample | |
| CN209639685U (en) | A kind of gas storage holder piston operating status measuring device | |
| CN109655406A (en) | Spectral water quality detection device and detection method | |
| CN215678251U (en) | Acid-base neutralization automatic titration system based on color identification | |
| CN209690151U (en) | A kind of spectral water quality detection device | |
| CN105136693B (en) | A kind of measurement method of water-quality constituents absorption coefficient and scattering coefficient | |
| RU207785U1 (en) | Device for diagnosing the corrosion state of the inner surface of reinforced concrete supports of the contact network | |
| JPS6385336A (en) | Turbidity meter | |
| CN112540066A (en) | In-situ molecular fluorescence analysis device for reaction kinetic mechanism research | |
| US2966091A (en) | Industrial refractometers | |
| RU2403569C2 (en) | Device for measuring aggregation state and deformation state of erythrocytes and method of using said device | |
| KR101782052B1 (en) | An apparatus for monitoring the flame and a method for controlling the flame | |
| CN105021570A (en) | Liquid concentration detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200306 |