Sampling system of under-pressure reaction kettle

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a sampling system of an under-pressure reaction kettle, which comprises a reaction kettle and a sampling system connected with the reaction kettle, the sampling system comprises a sampling box positioned above the reaction kettle, a sampling lower insertion pipe and a replacement pipe which are communicated with the lower side of the sampling box and are arranged at intervals, a sampling outlet pipe and a blow-down pipe which are communicated with the upper side of the sampling box and are arranged at intervals, a feeding valve arranged on the sampling lower insertion pipe, and a replacement valve arranged on the replacement pipe; the sampling valve is arranged on the sampling outlet pipe; the emptying valve is arranged on the emptying pipe; according to the device, reaction liquid in the reaction kettle can be taken out at any time under the condition that the reaction kettle is under pressure, so that the stability of a reaction system of the reaction kettle is improved, the influence of pressure relief sampling on the quality of a final product and the loss of reaction materials are prevented, the sampling process is safe and reliable, and the accuracy of a sampling result can be ensured by a replacement process in the sampling process.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a sampling system for a pressurized reactor. Background Art

[0002] The high-pressure reactor (magnetic high-pressure reactor) is a typical innovation in the application of magnetic transmission devices to reaction equipment. It fundamentally solves the shaft seal leakage problem that was previously insurmountable with packing seals and mechanical seals. It is leak-free and pollution-free, making it the most ideal device for chemical reactions under high temperature and high pressure in China. It is particularly advantageous for chemical reactions involving flammable, explosive, and toxic media. In chemical and pharmaceutical equipment, reactors are key equipment, especially high- and medium-pressure reactors. The pressurized reaction time can reach more than ten hours. How to remove the reaction liquid and analyze the reaction results without stopping the reactor or reducing the pressure at a certain stage, so as to accurately determine the reaction status, has always been a difficult problem to solve in this field.

[0003] In the synthesis process of oxime ester-S5, ensuring that the reaction is carried out under constant pressure conditions is crucial given the reaction system's strict requirements for the pressure environment. However, timely and accurate sampling and testing of the reaction mixture is also indispensable to monitor the reaction progress, evaluate product quality, and optimize process conditions. Faced with this challenge, direct pressure relief sampling not only leads to unnecessary loss of reaction materials, but may also have an adverse effect on the stability of the reaction system and the quality of the final product. Utility Model Content

[0004] The purpose of the utility model is to provide a sampling system for a pressurized reactor, which is used to solve the problem that when sampling a pressurized reactor, sampling after pressure relief will cause loss of reaction materials and affect the stability of the reaction system and the quality of the final product.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sampling system for a pressurized reactor, comprising a reactor and a sampling system connected to the reactor, the sampling system comprising a sampling box located above the reactor, a sampling lower cannula and a displacement tube connected to the lower side of the sampling box and arranged at intervals, a sampling outlet tube and a vent tube connected to the upper side of the sampling box and arranged at intervals, a feed valve provided on the sampling lower cannula, a displacement valve provided on the displacement tube, a sampling valve provided on the sampling outlet tube, and a vent valve provided on the vent tube, one end of the sampling lower cannula passes through and extends into the interior of the reactor, and one end of the displacement tube is connected to the upper side of the reactor; the sampling system also comprises an electric control console, which is electrically connected to the sampling valve, vent valve, feed valve, and displacement valve.

[0006] Furthermore, the sampling box is provided with a material level meter, and the electric control console is electrically connected to the material level meter.

[0007] Furthermore, the sampling box is provided with a pressure gauge, and the electric control console is electrically connected to the pressure gauge.

[0008] Furthermore, the sampling valve and the feed valve are interlocked, and the vent valve and the replacement valve are interlocked.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The utility model has the following beneficial effects:

[0011] When the reactor reacts for a certain period of time and sampling is required, the DCS operator closes the sampling valve, opens the vent valve, and opens the feed valve through the electronic control console. The reaction liquid in the reactor enters the sampling box through the sampling lower cannula under pressure. When a certain amount of reaction liquid enters the sampling box, the feed valve and the vent valve are closed, and the replacement valve is opened. The reaction liquid in the sampling box enters the reactor through the replacement tube. The feed valve is then opened for replacement to ensure that the materials in the sampling box are all materials of this batch and the accuracy of the sampling is ensured. When the replacement is qualified, the feed valve and the replacement valve are closed, the vent valve is opened, the sampling valve is opened, and sampling is carried out through the sampling outlet tube. The device can take out the reaction liquid in the reactor at any time when the reactor is under pressure, thereby improving the stability of the reactor reaction system and preventing pressure relief sampling from affecting the quality of the final product and causing loss of reaction materials. The sampling process is safe and reliable, and the replacement process during the sampling process can ensure the accuracy of the sampling results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of the sampling system of the pressurized reactor of the present invention;

[0013] Figure 2 This is a system control block diagram of the sampling system of the pressurized reactor of the present invention.

[0014] In the figure: 1. Sampling lower intubation tube; 2. Feed valve; 3. Material level meter; 4. Sampling valve; 5. Vent valve; 6. Pressure gauge; 7. Replacement valve; 8. Reactor; 9. Sampling box; 10. Sampling outlet pipe; 11. Vent pipe; 12. Replacement pipe. DETAILED DESCRIPTION

[0015] See also Figure 1-2, a sampling system for a pressurized reactor, comprising a reactor 8, a sampling system connected to the reactor 8, the sampling system comprising a sampling box 9 located above the reactor 8, a sampling lower intubation tube 1 and a displacement tube 12 communicated with the lower side of the sampling box 9 and arranged at intervals, a sampling outlet tube 10 and a venting tube 11 communicated with the upper side of the sampling box 9 and arranged at intervals, a feed valve 2 provided on the sampling lower intubation tube 1, a displacement valve 7 provided on the displacement tube 12, a sampling valve 4 provided on the sampling outlet tube 10, and a venting valve 5 provided on the venting tube 11, one end of the sampling lower intubation tube 1 passes through and extends into the interior of the reactor 8, and one end of the displacement tube 12 is communicated with the upper side of the reactor 8; the sampling system further comprises an electronic control console, which is electrically connected to the sampling valve 4, the venting valve 5, the feeding valve 2, and the displacement valve 7; when the reactor 8 reacts for a certain period of time and needs to be sampled, the DCS operator closes the sampling valve 4 and opens the venting valve through the electronic control console Empty valve 5, open feed valve 2, the reaction liquid in reactor 8 enters sampling box 9 through sampling lower intubation 1 under pressure, when a certain reaction liquid enters sampling box 9, close feed valve 2, close vent valve 5, open replacement valve 7, the reaction liquid in sampling box 9 enters reactor 8 through replacement tube 12, then open feed valve 2 for replacement, ensure that the material in sampling box 9 is all material of this batch, ensure the accuracy of sampling, when replacement is qualified, close feed valve 2 and replacement valve 7, open vent valve 5, open sampling valve 4 and take samples through sampling outlet pipe 10; the device can take out the reaction liquid in reactor 8 at any time when reactor 8 is under pressure, improves the stability of reaction system of reactor 8, prevents pressure relief sampling from affecting the quality of final product and causing loss of reaction materials, the sampling process is safe and reliable, and the replacement process in the sampling process can ensure the accuracy of sampling results.

[0016] A level meter 3 is provided on the sampling box 9, and the electronic control console is electrically connected to the level meter 3; when the reaction liquid in the reactor 8 enters the sampling box 9, when the level meter 3 detects that there is material in the sampling box 9, the electronic control console controls the feed valve 2 to close.

[0017] The sampling box 9 is provided with a pressure gauge 6, and the electronic control console is electrically connected to the pressure gauge 6; after opening the vent valve 5, when the pressure of the pressure gauge 6 is less than the set value, the electronic control console sampling valve 4 is opened for sampling.

[0018] The sampling valve 4 and the feed valve 2 are interlocked, and the vent valve 5 and the replacement valve 7 are interlocked; the sampling valve 4 and the feed valve 2 are interlocked, and the vent valve 5 and the replacement valve 7 are interlocked. When one of the valves is opened, the other valve cannot be opened, thereby improving the safety of the device.

[0019] Working principle: When the reactor 8 reacts for a certain period of time and needs to be sampled, the DCS operator closes the sampling valve 4, opens the vent valve 5, and opens the feed valve 2 through the electronic control console. The reaction liquid in the reactor 8 enters the sampling box 9 through the sampling lower cannula 1 under pressure. After the reaction liquid in the reactor 8 enters the sampling box 9, when the material level meter 3 detects that there is material in the sampling box 9, the electronic control console controls the feed valve 2 to close, the vent valve 5 to close, and the displacement valve 7 to open. The reaction liquid in the sampling box 9 enters the reactor 8 through the displacement tube 12, and then the feed valve 2 is opened for displacement. , ensure that the materials in the sampling box 9 are all materials of this batch, ensure the accuracy of sampling, when the replacement is qualified, close the feed valve 2 and the replacement valve 7, open the vent valve 5, and when the pressure of the pressure gauge 6 is less than the set value, the sampling valve 4 of the electronic control console is opened for sampling; the device can take out the reaction liquid in the reactor 8 at any time when the reactor 8 is under pressure, improve the stability of the reaction system of the reactor 8, prevent the pressure relief sampling from affecting the quality of the final product and causing loss of reaction materials, the sampling process is safe and reliable, and the replacement process in the sampling process can ensure the accuracy of the sampling results.

[0020] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sampling system for a pressurized reactor, comprising a reactor (8) and a sampling system connected to the reactor (8), characterized in that: The sampling system comprises a sampling box (9) located above the reactor (8), a sampling lower intubation tube (1) and a displacement tube (12) communicated with the lower side of the sampling box (9) and arranged at intervals, a sampling outlet tube (10) and a venting tube (11) communicated with the upper side of the sampling box (9) and arranged at intervals, a feed valve (2) provided on the sampling lower intubation tube (1), a displacement valve (7) provided on the displacement tube (12), a sampling valve (4) provided on the sampling outlet tube (10), and a venting valve (5) provided on the venting tube (11), one end of the sampling lower intubation tube (1) passes through and extends into the interior of the reactor (8), and one end of the displacement tube (12) communicates with the upper side of the reactor (8); the sampling system further comprises an electric control console, which is electrically connected to the sampling valve (4), the venting valve (5), the feeding valve (2), and the displacement valve (7).

2. The sampling system for a pressurized reactor according to claim 1, characterized in that: A material level meter (3) is provided on the sampling box (9), and the electric control console is electrically connected to the material level meter (3).

3. The sampling system for a pressurized reactor according to claim 1, wherein: The sampling box (9) is provided with a pressure gauge (6), and the electric control console is electrically connected to the pressure gauge (6).

4. The sampling system for a pressurized reactor according to claim 1, wherein: The sampling valve (4) and the feed valve (2) are interlocked, and the vent valve (5) and the replacement valve (7) are interlocked.

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