Full-automatic closed sampling system for reaction kettle

Abstract

The invention discloses a full-automatic closed sampling system for a reaction kettle. The full-automatic closed sampling system comprises a material suction assembly, a liquid level monitoring assembly, a circulating sampling assembly, a vacuum adsorption assembly, a nitrogen purging assembly, a PH value measuring assembly and a PLC control assembly. According to the full-automatic closed sampling system for the reaction kettle, the pneumatic control valve and the liquid level control unit are additionally arranged, one-button operation can be achieved through PLC control, meanwhile, vacuum is used for assisting material suction to enable the circulating pump to act, and therefore the liquid in the sampling system and the liquid in the reaction kettle are consistent in characteristic, and liquid needing to be detected is smoothly extracted. The plug-in PH probe can constantly provide the PH value related to the liquid in the reaction kettle, and not only has the advantages of simple structure, simplicity in operation and rationalization in arrangement, but also is more real, safe and reliable in sampling, and can realize large-capacity reaction kettle sampling.

Description

technical field [0001] The invention relates to the technical field of sampling in chemical industry and pharmacy, in particular to a fully automatic reaction kettle airtight sampling system. Background technique [0002] When using an analytical instrument to determine the composition and content of the material to be tested, the material to be tested must be taken out from the process pipeline or container and transported to the instrument. This device is called a sampling system. The sampling system requires that samples be taken out quickly, and the samples are authentic and representative, so as to obtain more accurate test results to guide production. [0003] At present, there is no special equipment to choose from for the use of the sampling system for reactors in China, and there is no professional manufacturer in the domestic market to produce such sampling devices. When most chemical companies need to sample the medium in the reactor, they basically use a simple ...

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Problems solved by technology

When most chemical companies need to sample the medium in the reactor, they basically use a simple manual sampler or a suction tube to directly suck the required sample from the reactor, and the sampling device and method are relatively simple and outdated.

[0004] Therefore, there are still some defects and potential safety hazards in the existing reactor airtight sampling system: (1) the existing sampling system adopts manual operation, combined with a diaphragm pump for internal circulation, and a sampling valve is set in the flow channel pipe to extract the reactor. For liquid samples, it is difficult to ensure that the characteristics of the sampling liquid and the liquid in the reactor are consistent, and there are certain operational control risks; The whole sampling process will be dangerous and will cause injury to the operator. At the same time, the medium in the reactor reacts with the air, resulting in inaccurate sampling medium and the risk of reaction explosion; (3) the current circulating pump sampling can only provide a suction lift of about 3M, It cannot meet the sampling requirements of large-volume reactors; (4) the existing sampling system does not have a pH meter, and cannot quickly read the pH value of the test sample

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