PH value detection device based on reaction kettle

Abstract

The utility model relates to the technical field of pH value detection, in particular to a pH value detection device based on a reaction kettle. The device comprises a diaphragm pump in signal connection with a central control room, and two ends of the diaphragm pump are respectively connected with a reaction kettle and a detection tank; the detection tank is provided with a feed port, a first discharge port and a second discharge port, the feed port and the second discharge port are both connected with the reaction kettle, and the first discharge port is connected with the diaphragm pump; the pH probe is arranged in the detection tank, and the top of the pH probe extends out of the detection tank; the top of the pH probe is connected with the data collection and transmission module; the connecting pipe group comprises a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe, the third connecting pipe and the fourth connecting pipe intersect and are connected with a collecting pipe, and the collecting pipe extends into the reaction kettle. The utility model effectively solves the technical problems in the prior art that the pH detection probe is difficult to maintain and the service life of the pH detection probe is shortened because the pH detection probe extends into the reaction kettle to detect the change of the pH value of the feed liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of pH value detection, in particular to a pH value detection device based on a reaction kettle. Background Art

[0002] When producing benzofuranone, acid is added to adjust the pH value of the feed liquid during the neutralization reaction. After the pH value of the feed liquid is adjusted, the catalyst is separated from the reaction liquid. If the pH value is too low, o-hydroxy phenylacetic acid will precipitate, causing o-hydroxy phenylacetic acid to be separated together with the catalyst when separating the catalyst. If the pH value is too high, the feed liquid will become sticky, prolonging the separation time. Therefore, for the neutralization reaction, the adjustment of the pH value is crucial, and the accuracy of the measured pH value needs to be ensured.

[0003] Currently, usually during the neutralization reaction, the manhole cover of the reaction kettle is manually opened at regular intervals to take samples to test the pH value of the feed liquid. However, this sampling method will cause the acid mist in the reaction kettle to leak, not only resulting in too low pH value of the adjusted feed liquid, but also causing the acid mist to pervade in the workshop environment, forming unorganized leakage. To solve the above problems, those skilled in the art insert a pH detection probe into the reaction kettle to contact the feed liquid to monitor the change of the pH value of the feed liquid in real time.

[0004] However, the method of inserting a pH detection probe into the reaction kettle to contact the feed liquid to monitor the change of the pH value of the feed liquid still has the following problems: 1. The feed liquid in the reaction kettle is in a state of being stirred all the time, which will cause a large impact force of the feed liquid on the pH detection probe, making the pH detection probe extremely easy to be damaged; 2. The pH detection probe needs to be taken out regularly for maintenance, and the process of taking out the pH detection probe is very cumbersome; 3. After the pH detection probe is inserted into the reaction kettle, a connecting wire needs to be connected to transmit data, and the connecting wire is easily corroded in the reaction kettle, resulting in electric leakage, causing potential safety hazards; 4. The material entering the reaction kettle from the hydrolysis kettle is a strong alkaline material, which is extremely easy to corrode the pH detection probe and reduce the service life of the pH probe. Summary of the Utility Model

[0005] The utility model provides a pH value detection device based on a reaction kettle to solve the technical problems in the prior art that inserting a pH detection probe into the reaction kettle to detect the change of the pH value of the feed liquid makes the maintenance of the pH detection probe difficult and reduces its service life.

[0006] To solve the above problems, the pH value detection device based on a reaction kettle provided by the utility model adopts the following technical solutions:

[0007] A pH value detection device based on a reaction kettle includes:

[0008] A diaphragm pump is signal - connected to a central control room and is respectively connected to a reaction kettle and a detection tank at both ends for transporting liquid material;

[0009] A detection tank is provided with a feed inlet, a first discharge outlet and a second discharge outlet. The feed inlet and the second discharge outlet are both connected to the reaction kettle, the first discharge outlet is connected to the diaphragm pump, and the first discharge outlet, the feed inlet and the second discharge outlet are arranged in sequence from top to bottom;

[0010] A pH probe is arranged in the detection tank and its top extends out of the detection tank for detecting the pH value of the liquid material in the detection tank;

[0011] A data collection and transmission module is connected to the top of the pH probe for transmitting the information detected by the pH probe to the central control room;

[0012] A connecting pipe group includes a first connecting pipe connecting the diaphragm pump and the reaction kettle, a second connecting pipe connecting the diaphragm pump and the first discharge outlet, a third connecting pipe connected to the feed inlet, and a fourth connecting pipe connected to the second discharge outlet. The third connecting pipe and the fourth connecting pipe intersect and are connected with a confluence pipe, and the confluence pipe extends into the reaction kettle;

[0013] Valves are arranged on the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe.

[0014] The beneficial effects of the pH value detection device based on a reaction kettle provided by the present utility model are as follows:

[0015] 1) By setting a diaphragm pump to transport the liquid material in the reaction kettle into the detection tank, using the pH probe arranged inside the detection tank to detect the liquid material in the detection tank, and transmitting the detected information to the central control room through the data collection and transmission module. After the detection is completed, the liquid material is transported back into the reaction kettle through the second discharge outlet, the fourth connecting pipe and the confluence pipe in sequence. During the detection process, the pH probe does not need to extend into the reaction kettle, avoiding the situation of damaging the pH probe when stirring the liquid material in the reaction kettle, and relatively prolonging the service life of the pH probe;

[0016] 2) The pH probe is arranged above the inside of the detection tank and its top extends out of the detection tank. The data collection and transmission module is connected to the top of the pH probe, which can not only ensure that the pH probe can detect the pH value of the liquid material, but also make the connection between the data collection and transmission module and the pH probe exposed outside the detection tank, avoiding the situation of damage to the connection between the two caused by the liquid material in the detection tank, and also facilitating the removal of the pH probe for maintenance.

[0017] In summary, the utility model effectively solves the technical problems in the prior art that when the pH detection probe is inserted into the reaction kettle to detect the change of the pH value of the liquid material, it is difficult to maintain the pH detection probe and the service life is reduced.

[0018] Further, the first discharge port is located on the opposite side of the feed port, and the second discharge port is located on the same side as the feed port.

[0019] Further, a sight glass is provided on the second connecting pipe.

[0020] Further, a soft water inlet is provided above the detection tank so that soft water can be introduced into the detection tank through the soft water inlet to clean the pH probe and the inner wall of the detection tank.

[0021] Beneficial effects: By providing a soft water inlet to introduce soft water into the detection tank, the pH probe and the inner wall of the detection tank can be cleaned in time after the detection, avoiding the long-term corrosion of the pH probe by the liquid material, and effectively extending the service life of the pH probe.

[0022] Further, a soft water valve is provided at the soft water inlet to control the delivery of soft water.

[0023] Further, the pH probe is installed on the detection tank by a quick-pressure screw.

[0024] Beneficial effects: Installing the pH probe on the detection tank by a quick-pressure screw makes the installation and disassembly of the pH probe more convenient, facilitating the regular removal of the pH probe for maintenance.

[0025] Further, the inner diameters of the first connecting pipe and the second connecting pipe are larger than the inner diameters of the third connecting pipe, the fourth connecting pipe, and the confluence pipe.

[0026] Further, the first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe, and the confluence pipe are all PP pipes.

[0027] Further, the diaphragm pump is an electric diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By referring to the drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the utility model will become easily understood. In the drawings, several embodiments of the utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0029] Figure 1 is the application structure schematic diagram of the pH value detection device based on the reaction kettle provided by the utility model;

[0030] Figure 2 is Figure 1 The partial enlarged schematic diagram at position A in

[0031] Description of the reference numerals in the drawings:

[0032] 1. Electric diaphragm pump; 2. Reactor; 3. Detection tank; 4. Feed inlet; 5. First discharge port; 6. Second discharge port; 7. pH probe; 8. Data collection and transmission module; 9. First connecting pipe; 10. Second connecting pipe; 11. Third connecting pipe; 12. Fourth connecting pipe; 13. Manifold; 14. Valve; 15. Sight glass; 16. Soft water inlet; 17. Soft water valve; 18. Soft water pipe. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0034] It should be noted that the main concept of the pH value detection device based on the reactor provided by the present invention is as follows: Connect the reactor and the detection tank through a diaphragm pump to transport the liquid material in the reactor to the detection tank, and set a pH probe in the detection tank to detect the pH value of the liquid material, without extending the pH probe into the reactor, avoiding the situation where the stirring liquid material in the reactor damages the pH probe; By setting the pH probe above the inside of the detection tank and making its top extend out of the detection tank, the data collection and transmission module is connected to the top of the pH probe, and the connection part of the two is located outside the detection tank, which can avoid the situation where the liquid material in the detection tank damages the connection between the two.

[0035] After introducing the basic principle of the present invention, the various non-limiting embodiments of the present invention will be specifically introduced below. The number of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction and does not have any limiting meaning.

[0036] Next, referring to several representative embodiments of the present invention, the principle and spirit of the present invention will be elaborated in detail.

[0037] Embodiment 1 of the pH value detection device based on the reactor provided by the present invention:

[0038] Such as Figure 1 and Figure 2As shown, the pH value detection device based on the reactor includes a diaphragm pump, a detection tank 3, a pH probe 7, a data collection and transmission module 8 and a connecting pipe group, and the diaphragm pump is connected to the central control room signal.

[0039] The structural composition of the detection tank 3 is introduced below. A first discharge port 5 is provided on the left side of the detection tank 3, and a feed port 4 and a second discharge port 6 are provided on the right side in order from top to bottom. The opening height of the first discharge port 5 is higher than the opening height of the feed port 4. The feed port 4 and the second discharge port 6 are both connected to the reactor 2, and the first discharge port 5 is connected to the diaphragm pump. The top of the detection tank 3 is also provided with an installation port for installing a pH probe 7 and a soft water inlet 16 for introducing soft water into the detection tank 3.

[0040] Specifically, the soft water inlet 16 is connected to a soft water pipe 18 , and a soft water valve 17 is also provided at the soft water inlet 16 . The soft water valve 17 is used to control the delivery of soft water, and the soft water is used to clean the pH probe 7 and the inner wall of the detection tank 3 .

[0041] Specifically, the pH probe 7 is installed at the installation port through a quick-press screw, and its top extends out of the detection tank 3. The top of the pH probe 7 is connected to the data collection and transmission module 8 to transmit the detected information to the central control room through the data collection and transmission module 8.

[0042] Next, the connection between the diaphragm pump and the detection tank 3 and the reactor 2 is introduced. The left end of the diaphragm pump is connected to a first connecting pipe 9, the end of which extends into the reactor 2, and the right end is connected to a second connecting pipe 10, the end of which is connected to the first discharge port 5. Valves 14 are provided on the first connecting pipe 9 and the second connecting pipe 10 to control the delivery of the feed liquid.

[0043] Specifically, the diaphragm pump is an electric diaphragm pump 1 .

[0044] Next, the connection between the detection tank 3 and the reactor 2 is introduced. The feed port 4 is connected to the third connecting pipe 11, the second discharge port 6 is connected to the fourth connecting pipe 12, the third connecting pipe 11 and the fourth connecting pipe 12 intersect and are connected to a manifold 13, the manifold 13 extends into the reactor 2, and valves 14 are provided on the third connecting pipe 11 and the fourth connecting pipe 12 to control the delivery of the liquid in the pipeline.

[0045] Specifically, the inner diameters of the first connecting pipe 9 and the second connecting pipe 10 are greater than the inner diameters of the third connecting pipe 11 , the fourth connecting pipe 12 and the converging pipe 13 .

[0046] In addition, a sight glass 15 is provided on the second connecting pipe 10 to facilitate the observation of the flow of the liquid material at any time while ensuring the transportation of the liquid material; the first connecting pipe 9, the second connecting pipe 10, the third connecting pipe 11, the fourth connecting pipe 12 and the confluence pipe 13 are all PP pipes (polypropylene pipes). The nominal diameter of the first connecting pipe 9 and the second connecting pipe 10 is 50 mm, and the nominal diameter of the third connecting pipe 11, the fourth connecting pipe 12 and the confluence pipe 13 is 25 mm; the reaction kettle is also connected with an adjusting pipe to introduce a liquid for adjusting the pH value of the liquid material into the reaction kettle through the adjusting pipe. A regulating valve is installed on the adjusting pipe, and the regulating valve is signal-connected to the central control room.

[0047] The working principle of the pH value detection device based on the reaction kettle provided by the present utility model is as follows:

[0048] First, open the valves on the first connecting pipe 9, the second connecting pipe 10 and the third connecting pipe 11, and remotely control the start of the electric diaphragm pump 1 through the central control room. The liquid material flows from the reaction kettle 2 through the confluence pipe 13, the third connecting pipe 11 and the feed inlet 4 into the detection tank 3 in sequence, and then flows back into the reaction kettle 2 through the first discharge port 5, the second connecting pipe 10, the sight glass 15 on the second connecting pipe 10, the electric diaphragm pump 1 and the first connecting pipe 9 in sequence. After the liquid material circulates for 5 - 10 minutes, close the valves 14 on the first connecting pipe 9 and the second connecting pipe 10;

[0049] Then, the liquid material continues to flow from the reaction kettle 2 through the confluence pipe 13, the third connecting pipe 11 and the feed inlet 4 into the detection tank 3. The pH probe 7 monitors the pH value of the liquid material in the detection tank 3 in real time, and the monitored information is transmitted to the central control room through the data collection and transmission module 8. When the pH value reaches the required value, the central control room closes the regulating valve in a chain reaction and controls the electric diaphragm pump 1 to close. Subsequently, open the valve 14 on the fourth connecting pipe 12, and the liquid material flows back into the reaction kettle 2 through the second discharge port 6, the fourth connecting pipe 12 and the confluence pipe 13 in sequence;

[0050] Finally, open the soft water valve 17, and the soft water is pumped into the detection tank 3 from the soft water pipe 18 through the soft water inlet 16 to clean the pH probe 7 and the inner wall of the detection tank 3. Then, it flows into the reaction kettle 2 through the second discharge port 6, the fourth connecting pipe 12 and the confluence pipe 13. After cleaning for 5 minutes, the pH probe 7 can be cleaned. After the flushing is completed, the central control room controls the electric diaphragm pump 1 to close, and the pH probe 7 is in a standby state;

[0051] If it is necessary to maintain and service the pH probe 7, open the quick-pressure screw, and the pH probe 7 can be taken out. After the maintenance and service are completed, insert the pH probe 7 into the installation port and tighten the quick-pressure screw to fixedly connect the pH probe 7 with the detection tank 3.

[0052] Example 2 of the pH value detection device based on a reactor provided by the present utility model:

[0053] The main difference between this example and Example 1 lies in:

[0054] In Example 1, the diaphragm pump is an electric diaphragm pump.

[0055] In this example, the diaphragm pump is a pneumatic diaphragm pump.

[0056] Example 3 of the pH value detection device based on a reactor provided by the present utility model:

[0057] The main difference between this example and Example 1 lies in:

[0058] In Example 1, the first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe, and the manifold pipe are all PP pipes.

[0059] In this example, the first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe, and the manifold pipe are PpH pipes (homopolypropylene pipes) or PVDF pipes (polyvinylidene fluoride pipes), etc.

[0060] According to the above description in this specification, those skilled in the art can also understand the following terms used, such as terms indicating orientation or positional relationship, such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer", etc. These terms are based on the orientation or positional relationship shown in the drawings of this specification. They are only for the purpose of facilitating the description of the solution of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms indicating orientation or positional relationship cannot be understood or interpreted as a limitation to the solution of the present utility model.

[0061] In addition, in the description of this specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically and clearly defined.

Claims

1. A pH value detection device based on a reaction kettle, characterized in that, Comprising: A diaphragm pump, which is signal-connected to a central control room and is respectively connected to a reaction kettle and a detection tank at both ends for transporting the feed liquid; The detection tank is provided with a feed inlet, a first discharge outlet and a second discharge outlet. The feed inlet and the second discharge outlet are both connected to the reaction kettle, the first discharge outlet is connected to the diaphragm pump, and the first discharge outlet, the feed inlet and the second discharge outlet are arranged in sequence from top to bottom; A pH probe is arranged in the detection tank, and its top extends out of the detection tank for detecting the pH value of the feed liquid in the detection tank; A data collection and transmission module is connected to the top of the pH probe for transmitting the information detected by the pH probe to the central control room; A connecting pipe group includes a first connecting pipe connecting the diaphragm pump and the reaction kettle, a second connecting pipe connecting the diaphragm pump and the first discharge outlet, a third connecting pipe connected to the feed inlet, and a fourth connecting pipe connected to the second discharge outlet. The third connecting pipe and the fourth connecting pipe intersect and are connected with a confluence pipe, and the confluence pipe extends into the reaction kettle; Valves are arranged on the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe.

2. The pH value detection device based on a reaction kettle according to claim 1, characterized in that, The first discharge outlet is located on the opposite side of the feed inlet, and the second discharge outlet is located on the same side of the feed inlet.

3. The pH value detection device based on the reaction kettle according to claim 1 or 2, characterized in that, A sight glass is arranged on the second connecting pipe.

4. The pH value detection device based on a reaction kettle according to claim 1 or 2, characterized in that, A soft water inlet is provided above the detection tank so as to introduce soft water into the detection tank through the soft water inlet to clean the pH probe and the inner wall of the detection tank.

5. The pH value detection device based on a reaction kettle according to claim 4, wherein, A soft water valve is arranged at the soft water inlet for controlling the transportation of soft water.

6. The pH value detection device based on the reaction kettle according to claim 1 or 2, characterized in that, The pH probe is installed on the detection tank through a quick-pressure screw.

7. The pH value detection device based on the reaction kettle according to claim 1 or 2, characterized in that, The inner diameters of the first connecting pipe and the second connecting pipe are larger than those of the third connecting pipe, the fourth connecting pipe and the confluence pipe.

8. The pH value detection device based on the reaction kettle according to claim 1 or 2, characterized in that, The first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe and the confluence pipe are all PP pipes.

9. The pH value detection device based on the reaction kettle according to claim 1 or 2, characterized in that, The diaphragm pump is an electric diaphragm pump.

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