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Easily polymerizable compound-treating apparatus using chamfered pot Flamge

A processing device and butt flange technology, which is used in chemical/physical processes, separation/purification of carboxylic acid compounds, chemical/physical/physical-chemical processes, etc., and can solve problems such as inability to measure liquid level and internal pressure state, clogging, etc. , to achieve the effect of preventing the deterioration of production efficiency and reducing the cleaning operation cost

Inactive Publication Date: 2004-10-13
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] use figure 2 When the conventional mating flange 2 shown is made into a structure in which a liquid level gauge, a pressure gauge, etc. are installed on the outer end surface of the mating flange 2, as time goes by, on the part 22 of the through hole 21, the gas slowly Polymers are generated due to stagnation, and as a result, the through-hole 21 is clogged, making it impossible to measure the liquid level, internal pressure, etc.

Method used

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  • Easily polymerizable compound-treating apparatus using chamfered pot Flamge
  • Easily polymerizable compound-treating apparatus using chamfered pot Flamge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] use figure 1 The butt flange with chamfering shown is the butt joint with chamfering angle α=45° and chamfering width t / total thickness of butt flange T=70%. flange.

[0026] In the middle and lower positions of the main body wall of the stainless steel (SUS316) acrylic acid refining tower, the butt joint flange for the connection of the diaphragm pressure gauge is installed, and at the same time, the same butt joint for the connection of the liquid level gauge is installed. Flange, for acrylic refining.

[0027] The composition of the raw material is 99% by weight of acrylic acid, 1% by weight of heavy substances such as acrylic acid dimer, and continuously operated under the conditions of 2.5kPa at the top of the tower, a temperature of 52°C, a pressure of 5kPa at the bottom of the tower, a temperature of 73°C, and a reflux ratio of 1.0. moon. As a result of in-house testing after the operation was stopped, no polymer adhesion was found on any of the mating flanges...

Embodiment 2

[0032] use figure 1 The butt flange with chamfering processing shown is a chamfered butt joint with chamfering angle α=35° and chamfering processing width t / total thickness of butt flange T=50% flange.

[0033] The butt flange is installed from the lower part of the acrylic acid refining tower made of stainless steel (SUS304) to the main body walls of the first and third stages, and is used as a window connection to purify acrylic acid.

[0034] The raw material composition is 95% by weight of acrylic acid, 5% by weight of light polymers such as acetic acid, and is continuously operated for 6 months under the conditions of 10kPa top pressure and 50°C temperature, 18kPa bottom pressure and 83°C temperature.

[0035] During this period, there is no polymer attached to the window, and the state inside the tower can be observed well. As a result of in-house testing, no polymer adhesion was found on any of the mating flanges.

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PUM

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Abstract

A lase-of-polymerization handling device having a pat flange installed on the body wall thereof, wherein the end face of a through-hole provided in the pat flange is chamfered on the body wall inner side, whereby, since the accumulation and polymerization of lase-of-polymerization gas can be prevented from occurring at the handling device inner side end face of the pad flange used for connecting instruments such as pressure gauges and liquid level gauges, erroneous indication of the instruments can be eliminated, and safe operation can be performed for a long period.

Description

technical field [0001] The present invention relates to a structure of a butt flange mounted on a main body wall of a processing device such as a reaction tower for preparing easily polymerizable compounds, a distillation tower, or a storage tank for storing solutions obtained therefrom. In particular, the present invention relates to a treatment device for easily polymerizable compounds that prevents gas generated from easily polymerizable compounds and the like from stagnating in through holes provided in the mating flange, and suppresses generation of polymers in this portion. Description of drawings [0002] figure 1 It is a cross-sectional view of the butt joint flange of the present invention installed on the main body wall of the treatment device such as easily polymerizable compounds, figure 2 It is a cross-sectional view of a conventional mating flange installed on the main body wall of a treatment device for easily polymerizable compounds. Background technique ...

Claims

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Application Information

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IPC IPC(8): B01D3/00B01D3/32B01J19/00
CPCB01J19/0053B01J2219/00065B01J2219/00254B01J19/002B01J2219/00067
Inventor 矢田修平强力正康高桥顺一
Owner MITSUBISHI RAYON CO LTD
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