A continuous sampling device suitable for high temperature and high corrosive reaction process

Abstract

This invention discloses a continuous sampling device suitable for high-temperature and highly corrosive reaction processes. It includes an oxidation reactor, a heat exchanger, and a receiving tank connected sequentially by a main pipeline. A sampling branch pipe is connected to the main pipeline between the heat exchanger and the receiving tank. A sampling valve for controlling the start and stop of sampling is installed at the end of the sampling branch pipe. A reflux branch pipe is connected to the outlet of the sampling valve. A funnel is installed at the end of the reflux branch pipe, and the bottom of the funnel is connected to the receiving tank through the reflux pipe. A funnel switch valve for controlling the start and stop of reflux is installed on the reflux pipe. During sampling, the funnel switch valve and the sampling valve are opened. Initially, the material flows back to the receiving tank through the funnel. After stabilization, the sample is taken at the sampling valve. After the sampling is completed, both valves are closed. This invention enables continuous sampling and real-time monitoring of the reaction; reduces material exposure and improves the operating environment; reduces the risk of contamination and increases the material recovery rate; and has a simple structure, is easy to maintain, and is suitable for application in high-temperature and highly corrosive reaction systems.

Description

Technical Field

[0001] This utility model belongs to the field of reaction process sampling technology in chemical, pharmaceutical and other fields, and specifically relates to a continuous sampling device suitable for high temperature and high corrosive reaction processes. Background Technology

[0002] In chemical and pharmaceutical production, many reaction processes (such as tubular oxidation reactions) are characterized by high temperatures and high corrosivity. In order to monitor the reaction process and ensure product quality, it is necessary to sample and analyze the reactants.

[0003] Currently, sampling for this type of reaction process mostly adopts intermittent sampling, which has the following obvious drawbacks: (1) Harsh operating environment: During the sampling process, high temperature, highly corrosive and highly irritating materials will be directly exposed to the operating environment, posing a serious threat to the health of the operators, and workers will find it difficult to endure long-term operation.

[0004] (2) High risk of material contamination: During intermittent sampling, the material has more opportunities to come into contact with the external environment, which can easily introduce impurities, leading to sample contamination, affecting the accuracy of the analysis results, and may also pollute the surrounding environment.

[0005] (3) Difficulty in material recovery: The materials that overflow or remain during the sampling process are difficult to recover effectively, which not only wastes materials, but may also cause secondary damage to equipment and the environment due to the corrosiveness of the materials.

[0006] (4) Unable to monitor in real time: The long interval between intermittent sampling cannot reflect the dynamic changes of the reaction process in real time, which may lead to a delay in the judgment of reaction abnormalities and affect the stability of product quality.

[0007] Therefore, there is an urgent need to design a continuous sampling device that can adapt to high-temperature and highly corrosive environments, improve operating conditions, reduce material contamination, and facilitate recycling. Utility Model Content

[0008] In view of the above-mentioned problems, the purpose of this utility model is to overcome the shortcomings of the existing technology and provide a continuous sampling device suitable for high-temperature and highly corrosive reaction processes, so as to achieve continuous sampling, reduce operational risks, reduce material contamination and improve material recovery rate.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A continuous sampling device suitable for high-temperature and highly corrosive reaction processes includes an oxidation reactor, a heat exchanger, and a receiving tank connected sequentially by a main pipeline. A sampling branch pipe is connected to the main pipeline between the heat exchanger and the receiving tank. A sampling valve for controlling the start and stop of sampling is installed at the end of the sampling branch pipe. A return branch pipe is connected to the outlet of the sampling valve. A funnel is provided at the end of the return branch pipe. The bottom of the funnel is connected to the receiving tank through the return pipe. A funnel switch valve for controlling the start and stop of return is provided on the return pipe.

[0010] Preferably, the end of the return branch pipe extends into the interior of the funnel.

[0011] Preferably, the sampling valve and the funnel switching valve are fluoropolymer-lined valves.

[0012] Preferably, the upper diameter of the funnel is larger than the lower diameter.

[0013] Preferably, the sampling valve and the funnel switch valve are manual valves or automatic control valves.

[0014] Preferably, both the sampling valve and the funnel switch valve are high and low temperature resistant and corrosion resistant valves.

[0015] Preferably, the main pipeline, sampling branch pipe, return branch pipe, funnel, and return pipe are all made of high-temperature and corrosion-resistant materials. The high-temperature and corrosion-resistant materials are 316L stainless steel, titanium alloy, or polytetrafluoroethylene (PTFE) lining material.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) Continuous sampling: Sampling can be carried out at any time as needed, and the reaction process can be monitored in real time to grasp the reaction status in a timely manner, which is conducive to improving the stability of product quality.

[0017] (2) Improved operating environment: The material is guided back to the receiving tank through the funnel and return pipe, which reduces the direct exposure of the material during the sampling process, reduces the harm of irritating materials to the operators, and improves working conditions.

[0018] (3) Reduce material contamination: During the sampling process, the material mainly flows in closed pipes and funnels, with little contact with the external environment, which reduces the risk of sample contamination and ensures the accuracy of the analysis results.

[0019] (4) Improve material recovery rate: The material is returned to the receiving tank through the return pipe in the early stage, which avoids material waste and reduces environmental pollution and equipment corrosion caused by material leakage.

[0020] (5) Simple and practical structure: The device is composed of conventional pipes, valves, funnels and other components. It has a simple structure, is easy to process, manufacture and install and maintain, and has a low cost. It is suitable for promotion and application in high temperature and high corrosive reaction systems. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the device structure of this utility model.

[0022] In the diagram: 1. Oxidation reactor; 2. Main pipeline; 3. Heat exchanger; 4. Sampling branch pipe; 5. Sampling valve; 6. Reflux branch pipe; 7. Funnel; 8. Reflux pipe; 9. Funnel switch valve; 10. Receiving tank. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1 As shown, a continuous sampling port device for a high-temperature and highly corrosive reaction process is connected in sequence to an oxidation reactor 1, a heat exchanger 3, and a receiving tank 10 via a main pipe 2. A sampling branch pipe 4 is connected to the main pipe 2 between the heat exchanger 3 and the receiving tank 10. A sampling valve 5 for controlling the start and stop of sampling is installed at the end of the sampling branch pipe 4. A return branch pipe 6 is connected to the outlet of the sampling valve 5. A funnel 7 is provided at the end of the return branch pipe 6. The bottom of the funnel 7 is connected to the receiving tank 10 through a return pipe 8. A funnel switch valve 9 for controlling the start and stop of return is provided on the return pipe 8.

[0025] In this embodiment, the main pipe 2, sampling branch pipe 4, return branch pipe 6, and return pipe 8 are all made of 316L stainless steel to withstand high temperatures and corrosive media; the sampling valve 5 and the funnel switch valve 9 are both PTFE-lined ball valves, which have good corrosion resistance and sealing performance; the funnel 7 is made of polytetrafluoroethylene, with an upper diameter of 15cm, a lower diameter of 5cm, and a height of 20cm, which facilitates material reception and reduces splashing.

[0026] During sampling, first open the funnel switch valve 9, then open the sampling valve 5. Initially, the material enters the funnel 7 through the return branch pipe 6, and then flows back to the receiving tank 10 through the return pipe 8. After the material flows out steadily, collect the sample at the outlet of the sampling valve 5 using a sampling container. After sampling is complete, close the sampling valve 5 and the funnel switch valve 9 in sequence. This utility model device can achieve continuous sampling, reduce operational risks, reduce material contamination, and improve material recovery rate.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A continuous sampling device suitable for high-temperature and highly corrosive reaction processes, characterized in that, The system includes an oxidation reactor (1), a heat exchanger (3), and a receiving tank (10) connected sequentially through a main pipeline (2). A sampling branch pipe (4) is connected to the main pipeline (2) between the heat exchanger (3) and the receiving tank (10). A sampling valve (5) for controlling the start and stop of sampling is installed at the end of the sampling branch pipe (4). A return branch pipe (6) is connected to the outlet of the sampling valve (5). A funnel (7) is provided at the end of the return branch pipe (6). The bottom of the funnel (7) is connected to the receiving tank (10) through a return pipe (8). A funnel switch valve (9) for controlling the start and stop of return is provided on the return pipe (8).

2. The continuous sampling device suitable for high-temperature and highly corrosive reaction processes according to claim 1, characterized in that, The end of the return branch pipe (6) extends into the interior of the funnel (7).

3. The continuous sampling device suitable for high-temperature and highly corrosive reaction processes according to claim 1, characterized in that, The sampling valve (5) and the funnel switch valve (9) are fluoropolymer-lined valves.

4. The continuous sampling device suitable for high-temperature and highly corrosive reaction processes according to claim 1, characterized in that, The upper diameter of the funnel (7) is larger than the lower diameter.

5. A continuous sampling device suitable for high-temperature and highly corrosive reaction processes according to claim 1, characterized in that, The sampling valve (5) and the funnel switch valve (9) are manual valves or automatic control valves.

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