Novel device for detecting pH value of liquid in reaction kettle on line

Abstract

The utility model discloses a novel device for on-line detection of liquid pH in a reaction kettle, which comprises a material conveying unit, a detection linkage unit and an auxiliary detection unit, the material conveying unit is used for sampling liquid materials in the reaction kettle and conveying the liquid materials to the detection linkage unit, and the material conveying unit comprises a bottom inserting pipe, a peristaltic pump and a return pipe, one end of the bottom inserting pipe extends into the bottom of the reaction kettle, the other end of the bottom inserting pipe is in fluid connection with the peristaltic pump, and the detection linkage unit is used for performing pH detection on a liquid material sample extracted from the reaction kettle and feeding back a detection result to the central control system in real time. Liquid materials in a reaction kettle are circularly extracted through the material conveying unit to complete a circulating sampling function, then are cooled through the auxiliary detection unit and are conveyed to the detection linkage unit to continuously detect the pH value of a liquid material sample in real time, so that the accuracy and representativeness of detection data are ensured, and the detection data are fed back to the central control system; materials are recycled in the detection process, so that the materials are not wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of pH detection, in particular to a novel device for online detection of pH of liquid in a reaction kettle. Background Art

[0002] In chemical production, it is necessary to measure the pH of reactants. The extent of chemical reactions can be determined based on the pH. The pH value can easily determine the extent of the reaction and the end point. Many products require very precise pH values. Acidity and alkalinity will also affect the appearance of the product. For example, rubidium and cesium salts are generally needle-shaped when acidic, have their own unique shape when neutral, and are flake or cube-shaped when alkaline. Each product has a different endpoint and a different pH value. Therefore, accurate and rapid measurement of pH is particularly critical.

[0003] At present, the pH value is measured in the chemical industry by manual sampling, which is then sent to QC for testing with a pH meter. The test data is then fed back to the production to adjust the process. This manual sampling and testing method has the disadvantages of frequent sampling, sampling deviation, cumbersome operation, increased labor costs, low efficiency, and large human errors, which affect the measurement results. There are also some automated pH testing equipment, but they are expensive, cumbersome to operate, inconvenient to inspect and maintain, and require shutdown to empty the entire production material, which is time-consuming. It cannot be inspected and maintained online with materials in real time. It is not practical, has low cost performance, and is difficult to promote on a large scale in the chemical industry and other fields. Utility Model Content

[0004] The purpose of the utility model is to provide a novel device for online detection of the pH value of liquid in a reactor, so as to solve the technical problems mentioned in the background technology that the existing automated pH detection equipment is expensive, cumbersome to operate, inconvenient to inspect and maintain, cannot be inspected and maintained online with materials in real time, is not practical, has low cost performance, and is difficult to promote on a large scale in the chemical industry and other fields.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel device for online detection of the pH value of liquid in a reactor comprises a material conveying unit, a detection linkage unit and an auxiliary detection unit. The material conveying unit is used to sample the liquid material from the reactor and convey it to the detection linkage unit. The material conveying unit comprises a bottom insertion tube, a peristaltic pump and a reflux tube. One end of the bottom insertion tube extends into the bottom of the reactor and the other end is connected to the peristaltic pump fluid. The detection linkage unit is used to perform pH detection on the liquid material sample extracted from the reactor and feed back the detection result to the central control system in real time. The detection linkage unit comprises a detection A detection tank, a thermometer and a pH meter, the top of the detection tank is connected to the peristaltic pump fluid through a pipeline, the upper part is connected to the reflux pipe through an overflow pipe, and the bottom is connected to the reflux pipe through a pipeline, the bottom end of the reflux pipe extends into the reactor, the thermometer and the pH meter are fixedly arranged in the detection tank and are electrically connected to the central control system, the auxiliary detection unit is used to control the temperature of the liquid material sample to meet the temperature requirement for detecting pH, the auxiliary detection unit includes a cooler, the cooler is fixedly arranged between the bottom tube and the peristaltic pump, and the two ends are respectively connected to the bottom tube and the peristaltic pump.

[0007] Furthermore, a first valve is provided at the upper end of the bottom tube for controlling whether to extract a liquid material sample from the reactor.

[0008] Furthermore, a second valve is provided at the bottom of the detection tank, which is used to control the liquid level height of the detection tank when the performance of the liquid material sample is stable and the pH is to be tested.

[0009] Furthermore, a third valve is provided at the upper end of the reflux pipe for controlling the reflux of the liquid material sample to the reaction kettle.

[0010] Furthermore, the cooler is a circulating water cooler.

[0011] Furthermore, the thermometer and pH meter are both provided with digital display screens.

[0012] Furthermore, the detection groove is a transparent circular groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is provided with a material conveying unit, a detection linkage unit and an auxiliary detection unit. The material conveying unit cyclically extracts the liquid material in the reactor to complete the cyclic sampling function, and then the liquid material sample is conveyed to the detection linkage unit after being cooled by the auxiliary detection unit to continuously detect the pH value of the liquid material sample in real time to ensure the accuracy and representativeness of the detection data, and the detection data is fed back to the central control system for the next step of operation. After the pH detection is completed, the liquid material sample is returned to the reactor. The material is recycled during the detection process without wasting the material.

[0015] 2. The utility model has the advantages of simple and reliable structure, convenient operation, small size and low manufacturing cost. The pH detection process is closed and the upper opening is used to avoid cross contamination and external interference, and does not affect the operation of other processes. It is easy to check and maintain, and has a certain improvement on the 6S of the site.

[0016] 3. The utility model is suitable for the fields of pharmaceutical chemicals, fine chemicals, and new energy. It can measure the changes in the pH value of the solution in the reactor in real time. It can be used to detect the pH value of general clean liquid materials, as well as particle-free suspensions, emulsions, organic materials, etc. The utility model can be combined with the material addition system to form an intelligent linkage integration, or it can be used alone as a dedicated pH detection device. It has strong practicality and is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the principle diagram of the utility model;

[0018] In the figure: 1-reactor, 2-bottom tube, 3-first valve, 4-cooler, 5-peristaltic pump, 6-detection tank, 7-thermometer, 8-pH meter, 9-second valve, 10-third valve, 11-reflux pipe. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See also Figure 1 , an embodiment provided by the utility model:

[0021] A novel device for online detection of the pH value of liquid in a reactor comprises a material conveying unit, a detection linkage unit and an auxiliary detection unit. The material conveying unit is used to sample the liquid material from the reactor 1 and convey it to the detection linkage unit. The material conveying unit comprises a bottom insert tube 2, a peristaltic pump 5 and a reflux tube 11. One end of the bottom insert tube 2 extends into the bottom of the reactor 1, and the other end is fluidically connected to the peristaltic pump 5. The material of the bottom insert tube 2 does not react with the material and can be one of enamel, polytetrafluoroethylene material and alloy material. The detection linkage unit is used to perform pH detection on the liquid material sample extracted from the reactor 1 and feed back the detection result to the central control system in real time. The detection linkage unit comprises Detection tank 6, thermometer 7 and pH meter 8. The top of the detection tank 6 is connected to the peristaltic pump 5 fluid through a pipeline, the upper part is connected to the reflux pipe 11 through an overflow pipe 12, and the bottom is connected to the reflux pipe 11 through a pipeline. The detection tank 6 is a transparent round tank, which is convenient for observing the actual internal situation. The bottom of the reflux pipe 11 extends into the reactor 1. The thermometer 7 and pH meter 8 are fixedly set in the detection tank 6 and are electrically connected to the central control system. The thermometer 7 and pH meter 8 are both equipped with digital display screens for easy viewing by on-site operators. The auxiliary detection unit is used to control the temperature of the liquid material sample to meet the temperature requirements for detecting pH (generally, it is more reasonable to detect pH at around room temperature). The auxiliary detection unit includes a cooler 4, which is a circulating water cooler. The cooler 4 is fixedly set between the bottom tube 2 and the peristaltic pump 5, and the two ends are respectively connected to the bottom tube 2 and the peristaltic pump 5.

[0022] A first valve 3 is provided at the upper end of the bottom-inserted tube 2 to control whether to extract a liquid material sample from the reactor 1. A second valve 9 is provided at the bottom of the detection tank 6 to control the liquid level of the detection tank 6 when the performance of the liquid material sample is stable and the pH is to be tested. A third valve 10 is provided at the upper end of the reflux pipe 11 to control the reflux of the liquid material sample to the reactor 1.

[0023] When it is necessary to perform pH detection on the liquid material in the reactor 1, first open the cooler 4, open the first valve 3, the second valve 9 and the third valve 10 in sequence, start the peristaltic pump 5, and the liquid material in the reactor 1 flows back to the reactor 1 through the bottom tube 2, the cooler 4, the peristaltic pump 5, the detection tank 6 and the reflux pipe 11. The thermometer 7 detects the temperature of the liquid material in real time and runs for 1-3 minutes to ensure the uniformity and stability of the liquid material sample. When the temperature reaches the detection requirement and the liquid material sample is representative, close or slightly open the third valve 10 to maintain a certain liquid level in the detection tank 6 to ensure The pH detection and temperature detection can work normally, and the pH meter 8 transmits the detected pH data to the central control system in real time. The operator uses the material adding system or the material adding device to add materials to the reactor 1 to adjust the pH value required by the liquid material until the pH value meets the process requirements. After continuously detecting the pH for a period of time and the data is stable, open the third valve 10 and close the peristaltic pump 5. After the liquid material has refluxed, close the first valve 3, the second valve 9 and the third valve 10 in turn, turn off the cooler 4, clean up, organize and record the data ledger, and then end the liquid material pH detection.

[0024] The utility model has the advantages of simple and reliable structure, convenient operation, small size and low manufacturing cost. The pH detection process is closed and the upper opening is used to avoid cross contamination and external interference, and does not affect the operation of other processes. It is easy to check and maintain, and also improves the 6S on site to a certain extent.

[0025] The utility model is suitable for the fields of pharmaceutical chemical industry, fine chemical industry and new energy, and can measure the change of pH value of solution in the reactor in real time. It can be used for detecting pH value of general clean liquid materials, as well as particle-free suspensions, emulsions, organic materials, etc. The utility model can be integrated with the material adding system to form intelligent linkage, or it can be used alone for detecting pH value. It has strong practicality and is easy to promote and apply.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel device for online detection of liquid pH in a reactor, characterized in that: The invention comprises a material conveying unit, a detection linkage unit and an auxiliary detection unit. The material conveying unit is used to sample liquid material from a reaction kettle (1) and convey the sample to the detection linkage unit. The material conveying unit comprises a bottom insertion tube (2), a peristaltic pump (5) and a reflux tube (11). One end of the bottom insertion tube (2) extends into the bottom of the reaction kettle (1) and the other end is fluidically connected to the peristaltic pump (5). The detection linkage unit is used to perform pH detection on the liquid material sample extracted from the reaction kettle (1) and to feed back the detection result to a central control system in real time. The detection linkage unit comprises a detection tank (6), a thermometer (7) and a pH meter (8). The top of the detection tank (6) is provided with a temperature meter (7) and a pH meter (8). The upper part is fluidically connected to the peristaltic pump (5) through a pipeline, the upper part is connected to the reflux pipe (11) through an overflow pipe (12), and the bottom part is connected to the reflux pipe (11) through a pipeline. The bottom end of the reflux pipe (11) extends into the reaction kettle (1). The thermometer (7) and the pH meter (8) are fixedly arranged in the detection tank (6) and are electrically connected to the central control system. The auxiliary detection unit is used to control the temperature of the liquid material sample to meet the temperature requirement for detecting pH. The auxiliary detection unit includes a cooler (4). The cooler (4) is fixedly arranged between the bottom tube (2) and the peristaltic pump (5), and its two ends are respectively connected to the bottom tube (2) and the peristaltic pump (5).

2. According to claim 1, a novel device for online detection of liquid pH in a reactor is characterized in that: A first valve (3) is provided at the upper end of the bottom-inserted tube (2) for controlling whether to extract a liquid material sample from the reaction kettle (1).

3. The novel device for online detection of liquid pH in a reactor according to claim 1, characterized in that: A second valve (9) is provided at the bottom of the detection tank (6) and is used to control the liquid level of the detection tank (6) when the performance of the liquid material sample is stable and the pH value is to be tested.

4. The novel device for online detection of liquid pH in a reactor according to claim 1, characterized in that: A third valve (10) is provided at the upper end of the reflux pipe (11) for controlling the reflux of the liquid material sample to the reaction kettle (1).

5. The novel device for online detection of liquid pH in a reactor according to claim 1, characterized in that: The cooler (4) is a circulating water cooler.

6. The novel device for online detection of liquid pH in a reactor according to claim 1, characterized in that: The thermometer (7) and pH meter (8) are both provided with digital display screens.

7. The novel device for online detection of liquid pH in a reactor according to claim 1, characterized in that: The detection groove (6) is a transparent circular groove.

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