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Device for installing thermocouple on reactor in propenoic acid production

A technology of thermocouples and reactors, which is applied in the direction of using electric devices, measuring devices, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve the problems of difficulty in vertical installation of multi-point thermometers, and achieve reliable temperature detection. The effect of high propylene conversion rate and reduced operation risk

Active Publication Date: 2015-04-29
中石油吉林化工工程有限公司
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Problems solved by technology

[0012] In the X ten thousand / year acrylic acid plant, it is necessary to solve the difficulty of vertical installation of the multi-point thermometer in the acrylic acid oxidation reactor

Method used

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  • Device for installing thermocouple on reactor in propenoic acid production
  • Device for installing thermocouple on reactor in propenoic acid production
  • Device for installing thermocouple on reactor in propenoic acid production

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0023] Problems with the temperature measuring device of the acrylic acid oxidation reactor: one is the vertical installation of the multi-point thermometer, and each temperature measuring point is effectively fixed at the detection position through the fins, which prevents the bridge between the thermometer and the reactor tube; the other is the movable card The sleeve solves the sealing between the thermometer and the casing, and can flexibly adjust the fixed position, making the on-site installation flexible and convenient; third, the existence of the fins 6 adjusts the resistance drop after the catalyst is installed, and reduces the difficulty of catalyst installation.

[0024] A short flange pipe 10 is arranged on the head cover of the reactor, and a flange 9 is provided on the short flange pipe 10. A straight connector 8 is arranged...

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Abstract

The invention relates to a parameter measuring device in petrochemical production process. A device for installing a thermocouple on a reactor in propenoic acid production is characterized in that a short flange tube is arranged on a sealing cover of the reactor; a flange is equipped on the short flange tube; a straight connecting head is arranged on a flange cover; a movable clamping sleeve is arranged on the straight connecting head; the thermocouple is arranged inside the movable clamping sleeve; a fin is arranged on the thermocouple; and a spring is arranged at the lower end of the thermocouple. The device has the advantages of simple structure and easiness in manufacturing, solves the problem that a multi-point thermometer of a propenoic acid oxidation reactor is vertically installed, greatly reduces the difficulty in installing a catalyst, reduces the installation cost and ensures that the installation position of the thermometer is accurate; the temperature detection of the propenoic acid oxidation reactor is reliable and accurate; products in propenoic acid production are good in quality, the conversion rate of the propylene is high, the production in the oxidation process of the propylene is safe, the catalyst is prevented from cocking phenomenon in propylene production, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention relates to a device for measuring parameters in the production process of petrochemical industry, more specifically, relates to a device for installing thermocouples. Background technique [0002] Acrylic acid is produced by two-step oxidation of propylene. The core of the production technology lies in the propylene oxidation system. The first oxidation reactor and the second oxidation reactor are the key equipment. The first and second oxidation reactors are fixed-bed tubular reactors. The catalyst is passed through by propylene, and there is a heat conduction carrier between the shells, and the heat conduction carrier is hot molten salt. [0003] Its chemical reaction formula is as follows: [0004] CH 2 =CH-CH 3 +O 2 →CH 2 =CH-CHO+H 2 O+336.2kJ / mol [0005] CH 2 =CH-CHO+1 / 2O 2 →CH 2 =CHCOOH+240.2kJ / mol [0006] It can be seen from the above formula that both reactions are exothermic. [0007] In the reaction section of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/06C07C51/235C07C57/04G01K7/02
Inventor 李秀春王秋红巩传志刘利李欣平孙旭王巍魏立林李志远孙伟李伟孙恺张小广王涛王宝杰丁旭
Owner 中石油吉林化工工程有限公司
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