CN220751785U

CN220751785U - Mixture component concentration measurement system

Info

Publication number: CN220751785U
Application number: CN202322315953.4U
Authority: CN
Inventors: 萧曜君
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-04-09
Anticipated expiration: 2033-08-28

Abstract

The utility model relates to the technical field of chemical substance measurement, in particular to a mixture component concentration measurement system, wherein an operation display unit monitors a measured medium sampling unit, an extractant sampling unit, a mixing stirring device and a separation measurement unit, and the measured medium sampling unit, the extractant sampling unit, the mixing stirring device and the separation measurement unit are connected through pipelines and are provided with a constant temperature device. The system utilizes the least equipment, reliably solves the task which can be completed by a large number of instruments and equipment, provides reliable technical guarantee for industrial production, saves instrument and equipment resources and creates better economic benefit.

Description

Mixture component concentration measurement system

Technical Field

The utility model relates to the technical field of chemical substance measurement, in particular to a system for measuring the concentration of a mixture component.

Background

On a chemical production device for producing hydrogen peroxide by an anthraquinone method, the measurement of the concentration of organic phosphoric acid is an artificial titration method, and the basic flow is as follows: sampling, extracting, titrating, back extracting, and then manually calculating the result.

The manual titration method has the advantages of high labor intensity of workers, low efficiency, untimely reaction to production change of chemical devices, possibility of corrosion of equipment, uncontrolled chemical reaction, explosion and the like caused by the change of pH value of partial devices.

For the problems of the manual titration method, the document (publication number is CN 206193015U) filed before the applicant discloses a system for measuring the pH value of an organic matter, which adopts a measuring system for continuously measuring and responding to the pH value change of a medium in real time, and sequentially carries out preliminary mixing on a measured organic solution and deionized water through a front static mixer and full mixing on a mixed solution of the measured organic solution and the deionized water flowing in after the preliminary mixing through a rear mixing mixer, so that a response curve obtained by a measuring result of the pH value change of a chemical device is closer to a theoretical response curve compared with a response curve obtained by the prior art, the pH value change condition can be reduced more truly, and the pure lag time caused by the replacement process is shorter.

However, the above-mentioned organic matter ph value measurement system still has the following technical drawbacks: when the system is used for measurement, the organic solution and the deionized water are premixed through the static mixer, the turbulence net and the turbulence impeller in the static mixer, the first pipeline, the second pipeline, the third pipeline and the like, and then the organic solution and the deionized water are mixed through the mixing stirrer after being premixed, so that the steps of the whole system are complex, the required instruments and equipment are more, and the measurement time is longer.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a system for measuring the concentration of a mixture component. The system utilizes the least equipment, reliably solves the task which can be finished by a large number of instruments and equipment, provides reliable technical guarantee for industrial production, saves instrument and equipment resources and creates better economic benefit; in addition, the injury of volatile organic compounds to personnel bodies in the manual sampling process is avoided, no waste gas is discharged in the whole process, the liquid sample can flow back to the collecting container for recycling, the pollution of manual adoption to the environment is avoided, and the materials are saved.

The technical scheme adopted by the utility model for realizing the technical purpose is as follows: a system for measuring the concentration of a mixture component comprises a measured medium sampling unit, an extractant sampling unit, a mixing and stirring device, a separation measuring unit and an operation display unit;

the operation display unit monitors the measured medium sampling unit, the extractant sampling unit, the mixing stirring device and the separation measuring unit, the measured medium sampling unit, the extractant sampling unit, the mixing stirring device and the separation measuring unit are connected through pipelines, and a constant temperature device is arranged and adopts electric tracing.

The measured medium sampling unit and the extractant sampling unit comprise a group of pressure stabilizing valve, a group of regulating valve and a group of flowmeter, and are respectively used for continuously and quantitatively sampling the measured medium and the extractant to the mixing and stirring device.

The pressure of the measured medium and the extractant sampled by the process pipeline has certain fluctuation, is unfavorable for quantitative sample injection, can be relatively constant after passing through the pressure stabilizing valve, and can ensure constant sample injection flow because the pressure difference between the front and back of the regulating valve and the flowmeter is constant because the stirrer is basically normal pressure; the regulating valve is used for regulating the feeding flow, so that the flow of the medium sample injection unit to be tested and the flow of the extractant enter the stirrer according to a certain proportion; the flowmeter is used for measuring the volume flow of the medium sample injection unit to be measured and the volume flow of the extractant, and the flow ratio of the medium sample injection unit to be measured and the extractant affects the concentration measurement result, so that the measurement result of the flowmeter is input into the operation control part to compensate the concentration measurement result.

The pressure stabilizing valve, the regulating valve and the flowmeter are combined, so that the measured medium sampling unit and the extractant are added into the stirrer in a certain proportion at a stable flow rate.

Preferably, the mixing and stirring device comprises a container and a pneumatic motor stirrer, wherein the pneumatic motor stirrer is matched with a plurality of groups of straight blade disc turbine paddles, and a longitudinal baffle plate and a transverse baffle plate are arranged inside the container. The longitudinal baffle and the transverse baffle reduce the internal flow in the container, eliminate swirling and improve the mixing effect; compressed air is easy to obtain in factories, the pneumatic motor provides stirring power and meets the explosion-proof requirement, and the pneumatic motor is provided with a speed regulating valve and can regulate the output power of the motor.

Preferably, the separation measuring unit comprises a separator and a balance cylinder, the mixed liquid stirred and mixed by the mixing and stirring device enters the separator through a mixed liquid conveying pipeline, the height of an interface vertical line at the upper half part of the separator is 50% -75%, the mixed liquid is separated into a light phase with density ρ2 and a heavy phase with density ρ1 in the separator, and the light phase (density ρ2) and the heavy phase (density ρ1) dissolved with the measured medium sampling unit are separated.

Preferably, the light phase enters the balance cylinder from the upper part of the separator through a light phase connecting pipe and a light phase inlet, and the light phase inlet is the highest point of the light phase connecting pipe;

the heavy phase enters the balance cylinder through the heavy phase connecting pipe after passing through the measuring pool provided with the concentration meter from the lower part of the separator, and the heavy phase inlet is the highest point of the heavy phase connecting pipe;

the measuring pool is positioned at the low point of the heavy phase connecting pipe so as to ensure that the probe of the concentration meter is completely immersed; the balance cylinder equalizes the light phase and heavy phase inlet pressures.

Preferably, the horizontal center line of the separator is lower than the heavy phase inlet, and the vertical distance is L1, the horizontal center line of the separator 11 is lower than the light phase inlet, and the vertical distance is L2, so that l1ρ1=l2ρ2 is ensured to be the horizontal center line of the separator at the interface of the light phase and the heavy phase, and the allowable fluctuation range of the interface is maximum, so as to ensure the separation effect.

Preferably, the lower part of the balance cylinder is provided with a recovery interface, and the recovery interface is connected with an external recovery device through a recovery pipeline, and the recovery device is arranged as a recovery tank.

Preferably, the upper part of the mixing stirring device is connected with the upper part of the balance cylinder through an exhaust connecting pipeline, an automatic exhaust valve is arranged in the exhaust connecting pipeline, and gas carried by the measured medium sampling unit and the extractant sampling unit is released to the balance cylinder so as to prevent the gas from accumulating in the stirrer and affecting the mixing effect.

Preferably, the operation display unit collects two sample injection flow signals, one temperature measurement signal and one concentration meter signal, processes the collected sample injection flow signals and the temperature measurement signal, compensates the concentration signals by using the flow signals and the temperature signals, displays the measurement results on site, and simultaneously converts the measurement results into 4-20 mA current signals to be output remotely.

Compared with the prior art, the utility model has the beneficial effects that: the system for measuring the concentration of the components of the mixture omits the step of premixing, directly performs extraction reaction in the mixing and stirring device, uses more compact instruments and equipment, simultaneously utilizes the least equipment, reliably solves the task that a large amount of instruments and equipment are needed to be finished, provides reliable technical guarantee for industrial production, saves instrument and equipment resources, creates better economic benefit and has short measuring time.

And the mixing stirring device provides stirring power through the pneumatic motor, meets the explosion-proof requirement, and compressed air is easy to obtain in a factory, the pneumatic motor is provided with a speed regulating valve, the output power of the motor can be regulated, and the longitudinal baffle and the transverse baffle can reduce internal cutting flow in a container, eliminate swirling and improve the mixing effect.

According to the system for measuring the concentration of the mixture components, a measured medium and an extracting agent are added into a stirrer in a stable flow, pressure and a certain proportion through the combination of a pressure stabilizing valve, a regulating valve and a flowmeter, so that the stability and measurement accuracy of the system are high; simultaneously, the gas carried by the measured medium sampling unit 1 and the extractant sampling unit is released to the balance cylinder through the automatic exhaust valve and the exhaust connecting pipeline, so that the gas is prevented from accumulating in the stirrer, and the mixing effect is prevented from being influenced.

Drawings

FIG. 1 is a flow chart of a system for measuring the concentration of a mixture component.

Fig. 2 is a schematic diagram of the connection relationship between the units and devices.

Fig. 3 is a front sectional view of the mixing device.

Fig. 4 is a left side cross-sectional view of the mixing device.

Fig. 5 is a front view of the longitudinal baffle and the transverse baffle.

Fig. 6 is a top view structural view of the longitudinal baffle and the transverse baffle.

Fig. 7 is a top view of a straight blade disk turbine blade of an air motor blender.

Fig. 8 is a front view of a straight blade disk turbine blade of an air motor mixer.

Wherein:

1-a measured medium sample injection unit; 2-an extractant sample injection unit; 3-a mixing and stirring device; 301-a container; 302-a pneumatic motor mixer; 4-a separation measurement unit; 5-an operation display unit; 6-a constant temperature device; 7-a recovery device; 8-a pressure stabilizing valve; 9-a regulating valve; 10-a flow meter; 11-separator; 12-a balance cylinder; 13-a light phase connection; 1301-light phase inlet; 14-heavy phase connection; 1401-heavy phase inlet; 15-concentration meter; 16-an automatic exhaust valve; 17-a mixed liquor conveying pipeline; 18-an exhaust connection; 19-recovery line.

Description of the embodiments

The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

In the description of the present utility model, it will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships in which the inventive product is conventionally placed in use, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

As shown in fig. 1-8, a system for measuring the concentration of a mixture component comprises a (quantitative sample addition) medium sample injection unit 1, a (quantitative sample addition) extractant sample injection unit 2, a mixing and stirring device 3, a separation measurement unit 4, an operation display unit 5 and a constant temperature device 6.

The operation display unit 5 monitors the (quantitative sample adding) medium sample injection unit 1, the (quantitative sample adding) extractant sample injection unit 2, the mixing stirring device 3 and the separation measuring unit 4, the (quantitative sample adding) medium sample injection unit 1, the (quantitative sample adding) extractant sample injection unit 2, the mixing stirring device 3 and the separation measuring unit 4 are connected through pipelines, a constant temperature device 6 is arranged, and the constant temperature device 6 adopts electric tracing; the medium temperature can influence the solubility of the measured medium sampling unit in the extractant, especially weak acids such as carbonic acid, phosphoric acid and the like, and the ionization degree is different at different temperatures, and can influence the measurement result, so that the temperature of the sample is kept between 45 and 55 ℃ to ensure the measurement result to be stable and accurate.

It should be noted that the piping includes, but is not limited to, a mixed liquor conveying piping 17, an exhaust gas connecting piping 18, a recovery piping 19, and the like, and the solid line connection lines in fig. 1 represent piping, the multiple broken line connections represent electric heating wires, and the broken line at the center of the separator 11 represents a center line.

The (quantitative sample addition) medium sample injection unit 1 and the (quantitative sample addition) extractant sample injection unit 2 comprise a pressure stabilizing valve 8, a regulating valve 9 and a flowmeter 10 which are respectively used for continuously and quantitatively injecting the measured medium and the extractant into the part of the mixing and stirring device 3.

After the medium sampled by the process pipeline passes through the pressure stabilizing valve 8, the outlet pressure can be stabilized at a certain value, and the pressure difference between the inlet pressure of the regulating valve 9 and the outlet pressure of the flowmeter 10 is constant because the mixing and stirring device 3 is basically normal pressure, so that the sampling flow is ensured to be constant; the regulating valve 9 is used for regulating the medium flow, so that the flow of the measured medium sampling unit 1 and the flow of the extractant sampling unit 2 enter the mixing and stirring device 3 according to a certain proportion; the flowmeter 10 is used for measuring the sample injection volume flow of the measured medium and the volume flow of the extractant, and the flow ratio of the sample injection volume flow and the volume flow of the extractant affects the concentration measurement result, so the measurement result of the flowmeter 10 is input into the operation control part for compensating the measurement result.

The pressure stabilizing valve 8, the regulating valve 9 and the flowmeter 10 are combined, so that the measured medium and the extractant are added into the stirrer in a certain proportion with stable flow.

Further, the mixing and stirring device 3 comprises a container 301 and a pneumatic motor stirrer 302, wherein the pneumatic motor stirrer 302 is matched with a plurality of groups of straight-blade disc turbine paddles, and a longitudinal baffle plate and a transverse baffle plate are arranged inside the container 301. The longitudinal baffle and the transverse baffle reduce the internal flow in the container, eliminate swirling and improve the mixing effect; the pneumatic motor 302 provides stirring power, compressed air is easy to obtain in factories and meets the explosion-proof requirement, and the pneumatic motor 302 is provided with a speed regulating valve, so that the output power of the motor can be regulated.

Further, the separation measuring unit 4 comprises a separator 11 and a balance cylinder 12, the mixed solution stirred by the mixing stirring device 3 enters the separator 11 through a mixed solution conveying pipeline 17, the interface is between 50% and 75% of the vertical line height at the upper half part of the separator, and the light phase (density ρ2) and the heavy phase (density ρ1) dissolved in the measured medium sampling unit 1 are separated;

the light phase enters the balance cylinder 12 from the upper part of the separator 11 through the light phase connecting pipe 13 and the light phase inlet 1301, and the light phase inlet 1301 is the highest point of the light phase connecting pipe 13;

the heavy phase enters the balance cylinder 12 through the heavy phase connecting pipe 14 after passing through the measuring tank provided with the concentration meter 15 from the lower part of the separator 11, and the heavy phase inlet 1401 is the highest point of the heavy phase connecting pipe 14;

the measuring cell is located at the low point of the heavy phase connection pipe 14 to ensure that the probe of the concentration meter 15 is fully immersed; the balance cylinder 12 equalizes the light and heavy phase inlet pressures.

Further, the mixed liquid is separated into a light phase with density ρ2 and a heavy phase with density ρ1 in the separator 11, the horizontal center line of the separator 11 is lower than the heavy phase inlet 1401, the vertical distance is L1, the horizontal center line of the separator 11 is lower than the light phase inlet 1301, the vertical distance is L2, and l1ρ1=l2ρ2 is performed to ensure that the interface between the light phase and the heavy phase of the separator is the horizontal center line thereof, and the allowable fluctuation range of the interface is the largest, so as to ensure the separation effect.

Further, a recovery port is provided at the lower part of the balance cylinder 12, and an external recovery device 7 is connected through a recovery pipe 19, and the recovery device 7 is provided as a recovery tank.

Further, the upper part of the mixing and stirring device 3 is connected with the upper part of the balance cylinder 12 through an exhaust connecting pipeline 18, an automatic exhaust valve 16 is arranged in the exhaust connecting pipeline 18, and gas carried by the measured medium sampling unit 1 and the extractant sampling unit 2 is released to the balance cylinder 12 so as to prevent the gas from accumulating in the stirrer and affecting the mixing effect.

Furthermore, the operation display unit 5 collects two sample flow signals, a temperature measurement signal and a concentration meter signal, processes the collected sample flow signals and the temperature signal to perform compensation operation on the concentration signal, displays the measurement result on site, and simultaneously converts the measurement result into a 4-20 mA current signal to be output remotely.

The working principle of the mixture component concentration measuring system and the specific flow are as follows: the pressure stabilizing valve 8 stabilizes the pressure of the measured medium sampling unit 1 and the extractant 2 conveyed by the process device pipeline at a fixed value, and the whole flow is basically normal pressure, so that the pressure difference before and after the regulating valve 9 can be kept constant, the opening of the regulating valve 9 is regulated, the measured medium sampling unit 1 and the extractant 2 can keep stable flow, and the extraction proportion and the accuracy of the measurement result are ensured.

The operation display unit 5 receives the measurement signal, performs compensation calculation on the concentration measurement result according to the proportion of the extractant 2 and the measured medium sampling unit 1 and the temperature of the measured medium sampling unit 1 after extraction and separation, and outputs a 4-20 mA current signal for remote display while displaying the calculation result on site.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures, equivalent flows or equivalent functional transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims

1. The utility model provides a mixture component concentration measurement system, includes measured medium sampling unit (1) and extractant sampling unit (2), mixing stirring device (3), separation measurement unit (4) and operation display element (5), its characterized in that: the operation display unit (5) monitors the measured medium sampling unit (1), the extractant sampling unit (2), the mixing stirring device (3) and the separation measuring unit (4), and the measured medium sampling unit (1), the extractant sampling unit (2), the mixing stirring device (3) and the separation measuring unit (4) are connected through pipelines and are provided with the constant temperature device (6).

2. A system for measuring the concentration of a mixture component as set forth in claim 1, wherein: the medium sample injection unit (1) and the extractant sample injection unit (2) to be tested comprise a group of pressure stabilizing valves (8), regulating valves (9) and flow meters (10), and are respectively used for continuously and quantitatively injecting the medium to be tested and the extractant into the part of the mixing and stirring device (3).

3. A system for measuring the concentration of a mixture component as set forth in claim 1, wherein: the mixing stirring device (3) comprises a container (301) and a pneumatic motor stirrer (302), wherein the pneumatic motor stirrer (302) is matched with a plurality of groups of straight-blade disc turbine paddles, and a longitudinal baffle and a transverse baffle are arranged inside the container (301).

4. A system for measuring the concentration of a mixture component as set forth in claim 1, wherein: the separation measuring unit (4) comprises a separator (11) and a balance cylinder (12), wherein mixed liquid after being stirred and mixed by the mixing stirring device (3) enters the separator (11) through a mixed liquid conveying pipeline (17), the mixed liquid is separated into a light phase with the density of rho 2 and a heavy phase with the density of rho 1 in the separator (11), and the light phase and the heavy phase dissolved with the measured medium sampling unit (1) are separated.

5. A system for measuring the concentration of a mixture constituent as claimed in claim 4, wherein: the light phase enters the balance cylinder (12) from the upper part of the separator (11) through a light phase pipe (13) and a light phase inlet (1301), and the light phase inlet (1301) is the highest point of the light phase pipe (13);

the heavy phase enters the balance cylinder (12) through the heavy phase connecting pipe (14) after passing through a measuring pool provided with a concentration meter (15) from the lower part of the separator (11), and the heavy phase inlet (1401) is at the highest point of the heavy phase connecting pipe (14);

the measuring cell is located at the low point of the heavy phase connection pipe (14).

6. A system for measuring the concentration of a mixture constituent as claimed in claim 4, wherein: the separator (11) has a horizontal centerline lower than the heavy phase inlet (1401) and a vertical distance L1, and the separator (11) has a horizontal centerline lower than the light phase inlet (1301) and a vertical distance L2, such that l1ρ1=l2ρ2.

7. A system for measuring the concentration of a mixture constituent as claimed in claim 4, wherein: the lower part of the balance cylinder (12) is provided with a recovery interface, and the balance cylinder is connected with an external recovery device (7) through a recovery pipeline (19).

8. A system for measuring the concentration of a mixture constituent as claimed in claim 4, wherein: the upper part of the mixing and stirring device (3) is connected with the upper part of the balance cylinder (12) through an exhaust connecting pipeline (18), and an automatic exhaust valve (16) is arranged in the exhaust connecting pipeline (18).

9. A system for measuring the concentration of a mixture component as set forth in claim 1, wherein: the operation display unit (5) collects two sample injection flow signals, one temperature measurement signal and one concentration meter signal, processes the collected sample injection flow signals and one temperature measurement signal, compensates the concentration signals by using the flow signals and the temperature signals, displays the measurement results in situ, and simultaneously converts the measurement results into 4-20 mA current signals to be output remotely.