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On-line sampling method of reactor

A technology of reactor and sampler, applied in the field of sampling

Inactive Publication Date: 2012-04-25
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the problems existing in the existing sampling methods, the object of the present invention is to provide a reactor online sampling method, which has accurate sampling results and low cost; and the materials in the reactor are not affected

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Embodiment Construction

[0015] A kind of reactor online sampling method, figure 1 It is a schematic diagram of the connection between the reactor, the external circulation system and the sampler. In the figure, 1 is a reactor, 2 is a sampler, and 3 is an external circulation pump. In this method, an external circulation system is connected outside the reactor, and the sampler is connected to the external circulation system, so that the sampling result is accurate, and the materials in the reactor are not affected; the specific steps are as follows:

[0016] 1) Connect the external circulation system outside the reactor 1, connect the external circulation pump 3 to the pipeline, set the discharge valve F on the lower end pipeline of the reactor, set the feed valve G and the pipeline nitrogen inlet valve on the upper end pipeline of the reactor B; the sampler 2 is connected to the pipeline of the external circulation system through the sampling valve C and the sample return valve D, and a valve A is p...

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Abstract

The invention discloses an on-line sampling method of a reactor; an external circulation system is connected with the reactor; a sampler is connected with an external circulation pipeline; when sampling is needed to be carried out, the external circulation system is firstly started, material in the reactor enters into the special sampler of the external circulation pipeline, then an upper opening valve of the reactor is closed, nitrogen is filled into the special sampler; the material is pressed back into the external circulation pipeline from a bottom hole and then returns to the reactor, the operation is repeatedly carried out for a plurality of times for cleaning and replacing, and the material is finally pressed out by the nitrogen from an outlet of the sampler for sampling; and a valve used for connecting the special sampler and the external circulation pipeline is closed during sampling, so that the material of the reactor is not influenced, and the nitrogen is saved. The on-line sampling method of the reactor is applicable to carrying out on-line sampling on liquid substance in various reactors, and is simple and convenient.

Description

technical field [0001] The invention relates to a sampling method, in particular to an online sampling method for a reactor. Background technique [0002] During production, it is necessary to sample and analyze the polyether polyol in the reactor. Usually, sampling is usually carried out directly from the bottom of the reactor, and a representative sample can only be obtained after releasing more materials. Many reaction processes require air isolation, so the materials released during sampling are affected by contact with air, resulting in waste. When the reactor is under negative pressure, it is necessary to add nitrogen to the reactor to maintain positive pressure before the material can be released, so that the pressure in the reactor changes greatly, which not only affects the normal operation procedure of the reactor, but also wastes nitrogen. Therefore, the existing sampling methods can no longer meet the requirements. Contents of the invention [0003] In order ...

Claims

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Application Information

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IPC IPC(8): G01N1/10
Inventor 应珏翟洪金郑磊倪小明陈云良陈杰应军于文超徐华丽
Owner JURONG NINGWU CHEM
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