System for measuring high temperature in triazinone synthesis kettle

Abstract

The utility model discloses a triazinone synthesis kettle internal high temperature measuring system which comprises a liquid pumping pipe installed in a reaction kettle, the liquid pumping pipe extends out of the reaction kettle, a buffer tank is installed at the end, located on the reaction kettle, of the liquid pumping pipe, and a stop valve is installed at the position, located between the buffer tank and the reaction kettle, of the liquid pumping pipe. The buffer tank is provided with a detection disc, the detection disc is provided with a liquid level device, the side wall of the detection disc is provided with a detector and a sampling pipe, an air pressure tank is installed above the detection disc, the top of the air pressure tank is connected with an air pipe, and the air pipe is connected with a high-pressure air pipe and a vacuum air pipe through a tee joint. Compared with the prior art, under the condition that a pump set is not used, a sample can be extracted and sent back, so that the device can be applied to inspection and sampling of high-temperature, high-pressure and high-corrosivity solutions, certain buffering and pressure relief cooling can be conducted on the extracted sample, the measuring and sampling reliability is further improved, and the inspection and sampling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactor solution measurement, in particular to a high-temperature measurement system inside a triazinone synthesis kettle. Background Technique

[0002] Triazinone is an important intermediate of the herbicide metribuzin. Metribuzin belongs to an absorbed selective herbicide and is suitable for controlling annual broad-leaved weeds such as knotweed, Artemisia annua, bidens pilosa, green foxtail, common dayflower, goosegrass, wild oats and some annual gramineous weeds in crop fields such as soybean, potato, tomato and sugarcane. According to the pesticide toxicity classification standard in China, this drug belongs to a low-toxic herbicide, is low-toxic to humans and livestock, and is one of the main raw materials for the production of new pesticides.

[0003] In the triazinone synthesis process, there are mainly steps such as hydrolysis, oxidation, and ring closure. During the reaction process, it is necessary to adjust the dosage of raw materials and the pH value of each link to improve the reaction yield. Since the whole reaction is carried out in the kettle and the temperature is relatively high, the measurement of the internal solution of the reaction kettle cannot be carried out in real time. Therefore, we propose a high-temperature measurement system inside a triazinone synthesis kettle to solve the above problems. Content of the Utility Model

[0004] This application provides a high-temperature measurement system inside a triazinone synthesis kettle, which solves the problems that it is not easy to measure and sample the internal solution in a high-temperature strong acid environment in the triazinone reaction kettle.

[0005] This application provides a high-temperature measurement system inside a triazinone synthesis kettle, including a liquid extraction pipe installed inside the reaction kettle. The liquid extraction pipe extends outside the reaction kettle. A buffer tank is installed at one end of the liquid extraction pipe located inside the reaction kettle. A stop valve is installed at the position of the liquid extraction pipe between the buffer tank and the reaction kettle. A detection disc is installed on the buffer tank. A liquid level device is arranged on the detection disc. A detector and a sampling pipe are arranged on the side wall of the detection disc. An air pressure tank is installed above the detection disc. The top of the air pressure tank is connected with an air pipe. The air pipe is connected with a high-pressure air pipe and a vacuum air pipe through a three-way joint.

[0006] Preferably, the detection disc is cylindrical. The detector and the sampling pipe are both located on the arc-shaped side wall of the detection disc and are connected by a flange. Transparent windows are arranged on both sides of the detection disc.

[0007] Preferably, the liquid level device includes a laser emission device obliquely installed on one side of the transparent window and a laser receiving device installed on the other side of the transparent window.

[0008] Preferably, a cooling interlayer is arranged on the circumferential side wall of the buffer tank, and a temperature sensor is also arranged on the corresponding buffer tank.

[0009] Preferably, an anti-foaming net is arranged inside the buffer tank.

[0010] Preferably, the detection disc, the pressure vessel and the buffer tank are all connected by flanges.

[0011] Preferably, a liquid level gauge is installed at the bottom of the liquid extraction pipe.

[0012] As can be seen from the above technical solutions, the present application provides a high-temperature measurement system inside a triazine ketone synthesis kettle. When the present application is in use, the liquid extraction pipe is installed to extend below the liquid level of the reaction kettle. When it is necessary to measure or extract the reaction solution, after the pressure vessel is evacuated to a vacuum, the stop valve is opened. Under the action of the vacuum, the reaction solution enters the buffer tank through the liquid extraction pipe, and then enters the detection disc. Detection devices such as pH detection and component detection can be installed in the detection disc. When the pressure vessel returns to normal pressure, the sample can also be discharged through the sampling pipe and sent to the laboratory for testing. After the detection is completed, high-pressure gas is injected into the pressure vessel to pump the reaction solution in the detection disc and the buffer tank back into the reaction kettle.

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

[0014] 1. Through the setting of the pressure vessel, extraction or re-injection is carried out through negative pressure or positive pressure, solving the problem that it is not easy to sample and detect inside a high-temperature reaction kettle. Sampling and detection work can be carried out. Compared with installing sensors inside the kettle, the sensors can be effectively protected, and a working pump does not need to be used during the extraction process, and strong acids can be detected;

[0015] 2. Through the setting of the buffer tank, the reaction solution can be first pumped into the buffer tank for work such as cooling and buffering, and finally the reaction solution is sent to the detection disc for detection, reducing the erosion of the instruments inside the detection disc;

[0016] 3. Through the setting of the detection disc, a variety of sensors can be installed according to the production detection requirements, and the installation is convenient. Detection is carried out through the common area inside the detection disc, and it can also be observed with the naked eye. It is easy to use, the inspection is efficient, and the applicable range is wide.

[0017] In summary, the present application can extract and send back the sample without using a pump set. Therefore, it can be applied to the inspection and sampling of high-temperature, high-pressure, and highly corrosive solutions, and can perform certain buffering and pressure relief cooling on the extracted sample, further improving the reliability of measurement and sampling and the inspection and sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the implementation cases will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic structural diagram of a high-temperature measurement system inside a triazinone synthesis kettle proposed by the present utility model;

[0020] Figure 2 Schematic installation structure diagram of a high-temperature measurement system inside a triazinone synthesis kettle proposed by the present utility model;

[0021] Figure 3 Schematic installation structure diagram of a liquid level device of a high-temperature measurement system inside a triazinone synthesis kettle proposed by the present utility model;

[0022] In the figure: 1 reaction kettle, 2 liquid extraction pipe, 3 liquid level gauge, 4 stop valve, 5 buffer tank, 6 pressure tank, 7 gas pipe, 8 detection disc, 9 detector, 10 liquid level device, 101 laser receiving device, 102 laser emitting device, 11 transparent window, 12 sampling pipe, 13 cooling interlayer, 14 defoaming net, 15 temperature sensor. Specific embodiments

[0023] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0024] See Figures 1-3 , a high-temperature measurement system inside a triazinone synthesis kettle. This application is mainly used for the detection and sampling of the reaction liquid inside the triazinone reaction kettle. The original method was to directly install the sensor into the reaction kettle 1. Since the entire reaction is in a high-temperature and strong acid state, the lifespan of the sensor is short, resulting in high detection costs, and it is not easy to extract samples from the entire reaction kettle. Therefore, this application is designed. Specifically, it includes a liquid extraction pipe 2 installed inside the reaction kettle 1. When the liquid extraction pipe 2 is specifically arranged, it needs to be arranged below the liquid level to avoid empty extraction. Specifically, a liquid level gauge 3, that is, a sensor, can be installed at the bottom of the liquid extraction pipe 2. After touching the liquid level, it can give an alarm to determine the depth of entry into the kettle. It can also be obtained by calculating the height of the reaction kettle 1 and the length of the liquid extraction pipe 2 entering the kettle. The liquid extraction pipe 2 extends outside the reaction kettle 1, and external equipment establishes a connection with the reaction liquid inside the kettle through the liquid extraction pipe 2. Specifically, a buffer tank 5 is installed at one end of the liquid extraction pipe 2 located in the reaction kettle 1. During detection and sampling, the reaction liquid inside the reaction kettle 1 is first pumped into the buffer tank 5 for buffering. A defoaming net 14 is arranged inside the buffer tank 5, which can reduce the generation of foam through the defoaming net and play a certain buffering role. A stop valve 4 is installed at the position of the liquid extraction pipe 2 between the buffer tank 5 and the reaction kettle 1 to control the inflow and return flow of this application. A ball valve can be used during specific installation, which has the characteristic of good sealing performance;

[0025] A detection disk 8 is installed on the buffer tank 5 for installing detection devices. Specifically, the detection disk 8 is cylindrical, and a plurality of flange connection disks are installed on the circumferential arc side wall of the detection disk 8. Both the detector 9 and the sampling pipe 12 are located on the arc side wall of the detection disk 8 and are connected by flanges. The diameter and thickness of the detection disk 8 are set according to the installation quantity of the flange connection disks. When some flange connection disks are not in use, they can be directly blocked by blind plates. In order to avoid liquid in the flange connection disks, the flange connection disks are horizontal or the ends far away from the detection disk 8 are tilted upward. Transparent windows 11 are arranged at the plane positions on both sides of the detection disk 8, through which the liquid level of the reaction liquid reaching the detector 9 and the state of the reaction liquid can be observed. Specifically, glass material can be used. In order to avoid too high liquid level in the detection disk 8, a liquid level device is arranged on the detection disk 8. When the liquid level detection reaches the specified height, the stop valve 4 closes the liquid inlet. The detector 9 and the sampling pipe 12 are arranged on the side wall of the detection disk 8. The detector 9 can be a detection device such as pH detection or component detection, which is used for sampling inspection or directly inspecting through relevant devices;

[0026] A pressure tank 6 is installed above the detection disk 8. The pressure tank 6 is used to generate negative pressure or positive pressure. Among them, the liquid in the reaction kettle 1 is passed through the buffer tank 5 and the detection disk 8 by negative pressure, and the positive pressure is used to pump the reaction liquid in the buffer tank 5 and the detection disk 8 back into the reaction kettle 1. In this application, the extraction of the reaction liquid is not directly obtained through a pump group. Therefore, the cost of damage caused by the pump group directly contacting the reaction liquid can be effectively reduced, and the operation is stable and the control is convenient. The top of the pressure tank 6 is connected with an air pipe 7. The air pipe 7 is connected with a high-pressure air pipe and a vacuum air pipe through a tee. Among them, the high-pressure air pipe is directly connected to the compressed gas pipeline in the factory. When there is no negative pressure pipeline, the vacuum air pipe can be purchased with a small air compressor pump. By controlling the pressure in the pressure tank 6, the extraction and return of the reaction liquid are realized, which is convenient and efficient. The inspection equipment only contacts the reaction liquid when in use and is not easily damaged.

[0027] In the present utility model, the liquid level device includes a laser emission device 102 obliquely installed on one side of the transparent window 11 and a laser receiving device 101 installed on the other side of the transparent window 11. When the reaction liquid reaches the liquid level device, the laser trajectory of the laser emission device 102 will be changed. When the laser receiving device 101 cannot receive the laser signal, it proves that the liquid level has reached the specified position, and the stop valve 4 closes to stop pumping liquid.

[0028] In the present utility model, when the temperature of the detection solution is too high, a cooling sandwich 13 is arranged on the circumferential side wall of the buffer tank 5. Through cooling water, the reaction liquid in the buffer tank 5 can be cooled down. Correspondingly, a temperature sensor 15 is also arranged on the buffer tank 5, so that after its temperature reaches the set value, it enters the detection disk 8 for detection, improving the detection accuracy and the service life of the equipment.

[0029] In the present utility model, due to the relatively high sealing requirements of the present application, the detection disc 8, the pneumatic tank 6 and the buffer tank 5 are all connected by flanges, which have high sealing performance and are convenient to install.

[0030] As can be seen from the above technical solution, when the present application is in use, the liquid suction pipe 2 is installed to extend below the liquid level of the reaction kettle 1. When it is necessary to measure or extract the reaction liquid, after the pneumatic tank 6 is evacuated to a vacuum, the stop valve 4 is opened. Under the action of the vacuum, the reaction liquid enters the buffer tank 5 through the liquid suction pipe 2 and then enters the detection disc 8. Detection devices such as pH detection and component detection can be installed in the detection disc 8. After the pneumatic tank 6 returns to normal pressure, the sample can also be discharged through the sampling pipe 12 and sent to the laboratory for testing. After the detection is completed, high-pressure gas is injected into the pneumatic tank 6 to pump the reaction liquid in the detection disc 8 and the buffer tank 5 back into the reaction kettle 1.

[0031] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and the practice disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope of the present application is pointed out by the claims.

[0032] It should be understood that the present application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the protection scope of the present application.

Claims

1. A high-temperature measurement system inside a triazinone synthesis kettle, comprising a liquid extraction pipe (2) installed inside a reaction kettle (1), characterized in that: The liquid extraction pipe (2) extends outside the reaction kettle (1). A buffer tank (5) is installed at one end of the liquid extraction pipe (2) located in the reaction kettle (1). A stop valve (4) is installed at the position between the buffer tank (5) and the reaction kettle (1) on the liquid extraction pipe (2). A detection disk (8) is installed on the buffer tank (5). A liquid level device is arranged on the detection disk (8). A detector (9) and a sampling pipe (12) are arranged on the side wall of the detection disk (8). An air pressure tank (6) is installed above the detection disk (8). The top of the air pressure tank (6) is connected with an air pipe (7). The air pipe (7) is connected with a high-pressure air pipe and a vacuum air pipe through a tee.

2. The high-temperature measurement system inside the triazinone synthesis kettle according to claim 1, wherein The detection disk (8) is cylindrical. The detector (9) and the sampling pipe (12) are both located on the arc-shaped side wall of the detection disk (8) and are connected by a flange. Transparent windows (11) are arranged on both sides of the detection disk (8).

3. A high-temperature measurement system inside a triazinone synthesis kettle according to claim 2, characterized in that, The liquid level device includes a laser emission device (102) obliquely installed on one side of the transparent window (11) and a laser receiving device (101) installed on the other side of the transparent window (11).

4. A high-temperature measurement system inside a triazinone synthesis kettle according to claim 1, characterized in that A cooling sandwich layer (13) is arranged on the circumferential side wall of the buffer tank (5). A temperature sensor (15) is also arranged on the corresponding buffer tank (5).

5. A high-temperature measurement system inside a triazinone synthesis kettle according to claim 1, characterized in that, An anti-foaming net (14) is arranged in the buffer tank (5).

6. The high-temperature measurement system inside the triazinone synthesis kettle according to claim 1, characterized in that The detection disk (8), the air pressure tank (6) and the buffer tank (5) are all connected by flanges.

7. A high-temperature measurement system inside a triazinone synthesis kettle according to claim 1, characterized in that A liquid level gauge (3) is installed at the bottom of the liquid extraction pipe (2).

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