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Sampling assembly for detecting pH value of polymerization kettle

A technology for polymerization kettles and components, which is applied to sampling devices and other directions, can solve the problems of inconvenient disassembly and calibration, production impact, electrode short circuit, etc., and achieve the effects of easy disassembly, convenient disassembly, and small maintenance.

Active Publication Date: 2014-02-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the sensor is installed and fixed through the flange and bolts on the tank top, it is extremely inconvenient to disassemble and check
[0011] (2) The polymer often appears thick and hard on the inner wall of the detection chamber of the termination tank and the sleeve of the sensor, which firmly fixes the sensor in the detection chamber, causing the detection sensor to fail because it cannot be pulled out for calibration The control system cannot be put into automatic operation normally, and the production is affected
Therefore, it often occurs that the polymer penetrates into the sensor bore through the thread of the glass electrode, causing a short circuit of the electrode and damaging the sensor.
The medium pressure detected by the sensor should be within 2Kg, while the line pressure cannot be controlled

Method used

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  • Sampling assembly for detecting pH value of polymerization kettle
  • Sampling assembly for detecting pH value of polymerization kettle

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Embodiment Construction

[0038]The pH value detection and sampling assembly of the polymerization kettle according to the present invention is composed of an inlet shut-off valve 1, a pressure sampler 2, a pressure transmitter 3, a flow support 5, a pH transmitter 6, an outlet shut-off valve 7 and a return line 8 The sampling port is arranged at the filter 12 outlets, the inlet shut-off valve 1 is connected with the sampling port, one end of the pressure sampler 2 is connected with the inlet shut-off valve, and the other end is connected with the flow bracket inlet 5-2; the outlet 5-4 of the flow bracket is connected with the The outlet stop valve 7 is connected; one end of the flow support 5 is an open flange 5-1, and the other end is a shrinking sensor installation port 5-3, and the pH transmitter 6 is fixed on the flow support through the installation and fixing end cover of the sensor installation port. 5 above; the outlet of the outlet stop valve 7 is equipped with a return pipeline with a pipe di...

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Abstract

The invention relates to a sampling assembly for detecting a pH value of a polymerization kettle. A sampling opening is disposed at an outlet of a filter; an inlet shutoff valve is connected with the sampling opening; one end of a pressure sampling device is connected with the inlet shutoff valve; the other end of the pressure sampling device is connected with an inlet of a circulation bracket; an outlet of the circulation bracket is connected with an outlet shutoff valve; one end of the circulation bracket is provided with an open flange; the other end of the circulation bracket is provided with a sensor installation opening; a pH transmitter is fixed on the circulation bracket through an installation fixing end cover of the sensor installation opening; an outlet of the outlet shutoff valve is connected with a termination tank through a reflux pipleline; one end of the pressure sampling device is provided with an installation flange; the other end of the pressure sampling device is sealed; a pressure transmitter is mounted on the pressure sampling device; the pH transmitter is connected with a pH controller; the pH controller is connected with a control valve and a flow transmitter; one end of the control valve is connected with the flow transmitter; and the other end of the control valve is communicated with the polymerization kettle. The assembly is small in maintenance amount, convenient for maintenance, low in failure rate and convenient for disassembly. A probability that a detection chamber of the sensor is blocked by polymer is greatly reduced.

Description

technical field [0001] The invention relates to a detection and sampling component for detecting the pH value of a polymerization kettle prone to stuttering. Background technique [0002] The present invention is based on the detection technology of Japan's Yokogawa pH8EFP online pH analyzer, combined with polymer characteristics, the background technology is described as follows: [0003] 1. Description of production process: [0004] In the production of acrylic fiber, the four materials of oxidizing agent, reducing agent, mixed monomer and BME are sent into the polymerization reactor, and a chemical reaction occurs at a temperature of 62°C. Can. Dilute the polymer with a concentration of 20% to 15% in the termination tank with water. In order to prevent the residual monomer of the polymer from continuing to react in the delivery pipeline and the termination tank to generate a polymer with a molecular weight of not about 52000, it is necessary to drain the polymer in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10
Inventor 邱祥陈磊周冬明王海涛朱福军刘发吴耀文张永利孙秀敏聂国强叶晓军王建华徐丹唐立春丛秀华
Owner PETROCHINA CO LTD
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