Automatic cycle sampling pH value detection device

Abstract

The utility model discloses a pH value detection device capable of automatically and circularly sampling, which comprises a reaction kettle, a sampling port and a material returning port are formed on the reaction kettle and are respectively connected with a material pumping pipeline and a material returning pipeline, and a measuring cell is arranged between the material pumping pipeline and the material returning pipeline; the feeding end of the sampling opening extends into the reaction kettle, and a pH meter is arranged in the measuring cell; a first stop valve, a diaphragm pump and an emptying valve are arranged on the material pumping pipeline, and a second stop valve is arranged on the material returning pipeline; a flushing pipeline is connected to the pumping pipeline in front of the diaphragm pump, the other end of the flushing pipeline is connected to a flushing water supply device, and a third stop valve is arranged on the flushing pipeline. The reaction kettle is novel in design and simple in structure, real-time sampling detection of materials in the reaction kettle can be achieved, the reaction monitoring effect is guaranteed, manual monitoring is not needed, the production safety is improved, meanwhile, the reaction kettle cavity does not need to be modified, and the operation safety of the reaction kettle is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a pH detection device with automatic cyclic sampling. Background Technology

[0002] The chemical name for sodium hydrosulfite is sodium dithionite. The production of sodium hydrosulfite requires a synthesis reaction, which takes place in a synthesis reactor. During the reaction, the pH value of the reactants is a critical process parameter that needs to be measured accurately and in real time.

[0003] The reactor is a pressure vessel with a heating jacket. It is difficult to install a pH meter directly on the outer wall of the reactor. Currently, most tests are conducted by manually taking samples from the sampling port, which cannot meet the needs of real-time testing and also poses certain safety hazards. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the difficulty in installing pH meters on reaction vessels and the inability of manual detection to meet real-time detection requirements, by proposing an automatic cyclic sampling pH detection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic circulating sampling pH detection device includes a reaction vessel, which has a sampling port and a return port connected to a sampling pipeline and a return pipeline respectively, and a measuring cell is provided between the sampling pipeline and the return pipeline.

[0007] The inlet of the sampling port extends into the reactor, and a pH meter is installed in the measuring cell;

[0008] The material extraction pipeline is equipped with a first shut-off valve, a diaphragm pump and a vent valve, and the material return pipeline is equipped with a second shut-off valve.

[0009] A flushing pipeline is connected to the diaphragm pump on the material extraction pipeline. The other end of the flushing pipeline is connected to the flushing water supply device. A third shut-off valve is provided on the flushing pipeline.

[0010] Preferably, the return pipeline is equipped with a manual sampling valve.

[0011] Preferably, the diaphragm pump and the measuring tank are installed at the same horizontal level, and the discharge end of the diaphragm pump is connected to the bottom of the measuring tank.

[0012] Preferably, the first shut-off valve, the second shut-off valve, and the third shut-off valve are all pneumatic quick-shut-off valves.

[0013] More preferably, the first shut-off valve, the second shut-off valve and the third shut-off valve are all C-type ball valves.

[0014] Preferably, the one-way ball valve in the diaphragm pump is made of stainless steel.

[0015] Preferably, the first shut-off valve, the second shut-off valve, the pH meter, and the third shut-off valve are all electrically connected to the control box.

[0016] More preferably, the control box is equipped with a communication module, which is connected to a remote control system.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, the material is extracted from the pre-set sampling port on the reactor for pH detection and returned to the reactor through the pre-set return port, thereby realizing the self-circulation sampling and detection of the material in the reactor. No manual operation is required, which ensures the ability of continuous monitoring and also ensures the sealing of the reactor.

[0019] 2. In this utility model, the pipes and equipment in the detection device are cleaned by flushing the pipeline to ensure the cleanliness of the detection system and the accuracy of the detection.

[0020] 3. In this utility model, the measuring cell can be kept at full liquid level, ensuring that the electrode is immersed in the liquid to protect the electrode, ensuring a good electrode life and avoiding frequent equipment maintenance.

[0021] This utility model features a novel design and simple structure, enabling real-time sampling and detection of materials in the reactor, ensuring effective reaction monitoring, eliminating the need for manual monitoring, thus improving production safety. Furthermore, it eliminates the need to modify the reactor cavity, ensuring the safe operation of the reactor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] In the diagram: Reactor 1, Sampling port 11, Return port 12, Extraction pipeline 2, First shut-off valve 21, Diaphragm pump 22, Vent valve 23, Return pipeline 3, Second shut-off valve 31, Manual sampling valve 32, Measuring cell 4, pH meter 41, Flushing pipeline 5, Third shut-off valve 51, Control box 6, Remote control system 7. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1An automatic cyclic sampling pH detection device includes a reaction vessel 1. The reaction vessel 1 has a sampling port 11 and a return port 12, which are respectively connected to a suction pipe 2 and a return pipe 3. A measuring cell 4 is located between the suction pipe 2 and the return pipe 3. The inlet end of the sampling port 11 extends into the reaction vessel 1, and a pH meter 41 is installed in the measuring cell 4. Material in the reaction vessel 1 is fed into the measuring cell 4 through the suction pipe 2 via the inlet end of the sampling port 1. The pH value of the material is measured by the pH meter 41. After measurement, the material is returned to the reaction vessel 1 through the return pipe 3, realizing real-time cyclic measurement of the pH value of the material.

[0026] The material extraction pipeline 2 is equipped with a first shut-off valve 21, a diaphragm pump 22, and a vent valve 23, while the return pipeline 3 is equipped with a second shut-off valve 31. The diaphragm pump 22 is used for material extraction and circulation, and the pipeline is controlled by the first shut-off valve 21 and the second shut-off valve 31. The vent valve facilitates pipeline maintenance and pipeline control in emergency situations.

[0027] A flushing pipe 5 is connected to the material extraction pipe 2 before the diaphragm pump 22. The other end of the flushing pipe 5 is connected to a flushing water supply device. A third shut-off valve 51 is provided on the flushing pipe 5. The flushing pipe 5 is used to flush and clean the pipeline.

[0028] Based on the above technical solution, when the reactor 1 is running, the diaphragm pump 22 draws the material into the feeding pipeline 2 through the sampling port 11 and sends it into the measuring tank 4. The pH value of the material is measured by the pH meter 41. After the measurement is completed, the material returns to the reactor through the return pipeline 3 and the return port 12, realizing automatic circulation sampling and measurement of the material. There is no need to stop the machine or install a pH meter on the side of the reactor, which ensures the good sealing of the reactor.

[0029] When flushing the pipeline is required, first flush the extraction pipeline 2: close the diaphragm pump 22 and the second shut-off valve 31, open the first shut-off valve 21 and the third shut-off valve 31, and flush the extraction pipeline 2 with flushing water. After flushing, flush the return pipeline 3: close the first shut-off valve 21, open the diaphragm pump 22, the second shut-off valve 31 and the third shut-off valve 31, and flush the return pipeline 3, the measuring tank 4, and the electrodes of the pH meter 41 to ensure the cleanliness of the pipeline and the accuracy of pH measurement, and to ensure the unobstructed flow of the automatic circulation device's pipeline.

[0030] After rinsing, the measuring tank 4 needs to be filled with rinsing water to ensure that the electrode of pH meter 41 is immersed in the rinsing water. This protects the electrode, ensures the measurement accuracy of pH meter 41, and extends the service life of the pH electrode. It also ensures the stable operation of the self-circulating measuring device.

[0031] In this technical solution, such as Figure 1As shown, a manual sampling valve 32 is provided on the return pipeline 3. This facilitates sampling and testing via the manual sampling valve 32, eliminating the need for direct sampling from the reactor 1 and simplifying production monitoring.

[0032] In this technical solution, such as Figure 1 As shown, the diaphragm pump 22 and the measuring cell 4 are installed at the same horizontal level, and the discharge end of the diaphragm pump 22 is connected to the bottom of the measuring cell 4. Positioning the material outlet of the measuring cell 4 at the top or upper side wall facilitates maintaining a full liquid level in the measuring cell 4 to protect the electrodes of the pH meter 41. Simultaneously, it ensures a certain pressure at the discharge end of the diaphragm pump 22 to prevent vaporization caused by high material temperature, thus ensuring stable material extraction.

[0033] In this technical solution, such as Figure 1 As shown, the first shut-off valve 21, the second shut-off valve 31, and the third shut-off valve 51 are all pneumatic quick-closing valves. The shut-off valves employ a pneumatic spring self-resetting actuator, automatically closing the shut-off valve in case of air supply failure, ensuring the safety and reliability of each actuator action. The first shut-off valve 21, the second shut-off valve 31, and the third shut-off valve 51 are all C-type ball valves. C-type ball valves have no dead cavity and are full-bore, effectively preventing material accumulation and adhesion in the valve cavity. Material flow through the valve experiences low resistance. Furthermore, the C-type ball valve ball can achieve self-cleaning during opening and closing using the valve seat scraper structure, avoiding frequent maintenance.

[0034] In this technical solution, such as Figure 1 As shown, the one-way ball valve in the diaphragm pump 22 is made of stainless steel. The stainless steel valve body is relatively heavy, which ensures a good sealing effect and guarantees stable material suction.

[0035] In this technical solution, such as Figure 1 As shown, the first shut-off valve 21, the second shut-off valve 31, the pH meter 41, and the third shut-off valve 51 are all electrically connected to the control box 6. The control box 6 contains a communication module connected to a remote control system. The control box 6 enables switching control of the individual devices, allowing the remote control system to monitor the operating status of the detection device and facilitate pH value recording.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic cyclic sampling pH detection device, characterized in that, It includes a reaction vessel (1), which has a sampling port (11) and a return port (12) and is respectively connected to a sampling pipeline (2) and a return pipeline (3). A measuring pool (4) is provided between the sampling pipeline (2) and the return pipeline (3). The feed end of the sampling port (11) extends into the reactor (1), and the measuring cell (4) is equipped with a pH meter (41); The material extraction pipeline (2) is equipped with a first shut-off valve (21), a diaphragm pump (22) and a vent valve (23), and the return pipeline (3) is equipped with a second shut-off valve (31); The material extraction pipeline (2) is connected to a flushing pipeline (5) in front of the diaphragm pump (22). The other end of the flushing pipeline (5) is connected to the flushing water supply device. A third shut-off valve (51) is provided on the flushing pipeline (5).

2. The automatic cyclic sampling pH detection device according to claim 1, characterized in that, The return pipeline (3) is equipped with a manual sampling valve (32).

3. The automatic cyclic sampling pH detection device according to claim 1, characterized in that, The diaphragm pump (22) and the measuring tank (4) are installed at the same horizontal level, and the discharge end of the diaphragm pump (22) is connected to the bottom of the measuring tank (4).

4. The automatic cyclic sampling pH detection device according to claim 1, characterized in that, The first shut-off valve (21), the second shut-off valve (31) and the third shut-off valve (51) are all pneumatic quick shut-off valves.

5. The automatic cyclic sampling pH detection device according to claim 4, characterized in that, The first shut-off valve (21), the second shut-off valve (31) and the third shut-off valve (51) are all C-type ball valves.

6. The automatic cyclic sampling pH detection device according to claim 1, characterized in that, The one-way ball valve in the diaphragm pump (22) is made of stainless steel.

7. The automatic cyclic sampling pH detection device according to claim 1, characterized in that, The first shut-off valve (21), the second shut-off valve (31), the pH meter (41) and the third shut-off valve (51) are all electrically connected to the control box (6).

8. The automatic cyclic sampling pH detection device according to claim 7, characterized in that, The control box (6) is equipped with a communication module, which is connected to the remote control system.

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