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On-line pretreatment device of chromatographic gas sample and application method thereof

A pretreatment device and chromatographic technology, which is used in measurement devices, instruments, scientific instruments, etc., to ensure long-term effective operation, accurate analysis data, and easy installation.

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the online analysis process of the existing ethylene cracking furnace, the present invention provides a sample gas online pretreatment device and using method to process the online analysis sample obtained by the vortex cooler at the product outlet of the cracking furnace

Method used

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  • On-line pretreatment device of chromatographic gas sample and application method thereof
  • On-line pretreatment device of chromatographic gas sample and application method thereof

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Embodiment 1

[0031] (1) Pretreatment device for online chromatographic analysis of ethylene cracking furnace sample gas:

[0032]Water and heavy hydrocarbons are entrained in the sample gas of the ethylene cracking furnace; the pretreatment device includes: a box body 11, a buffer settling tank 2, a visible drain tank 4 that can observe the liquid level, a drain valve 5, and a gas filter 6. The pressure regulating valve 8 is located behind the pressure regulating valve 8 and the cleaning switching valve 9 is used to heat the steam heating pipeline 10 of the box body 11, the box body insulation layer, and the connecting pipeline; the connecting pipeline of the pretreatment device is made of stainless steel, Its inner surface is treated with super-hydrophobic paint to form an ultra-micro-nano structure with low surface tension, and the wall surface is distributed with small protrusions of about 10 microns composed of an ultra-micro structure of about 100 nanometers; the cleaning switching val...

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Abstract

The invention provides an on-line pretreatment device of a chromatographic gas sample, and the device is mainly used for on-line pretreatment of gas samples of an ethylene cracking furnace. The pretreatment device is a box structure, and is mounted between an outlet of an online analysis sampler of the ethylene cracking furnace and an on-line chromatogram. The on-line pretreatment device is mainly composed of a buffer sedimentation tank, a visual liquid-discharge tank, a gas filter, a pressure regulating valve, a cleaning transfer valve, a steam system and insulating parts. Inner surfaces of the connecting pipelines use ultramicro nanostructures with a low surface tension. The chromatographic gas sample can be treated to remove water, solid impurities and heavy hydrocarbon droplets, and outputted to the on-line chromatogram with a stable flow.

Description

technical field [0001] The invention relates to a sample processing device for gas chromatographic analysis, more specifically, to a preprocessing device for on-line analysis of cracking furnace gas samples and its application method. Background technique [0002] The petrochemical industry is the pillar industry of the national economy, and the ethylene plant is the leading device in the petrochemical industry. There are many methods for ethylene production, but the tube furnace cracking technology is the most mature. Most of the ethylene in the world is cracked by the tube furnace. legally produced. As an important device in the petrochemical production process, the main control goal of the ethylene cracking furnace is to control the cracking depth, production capacity and product selectivity. Effective cracking operations depend on accurate on-line analysis of the cracked gas at the outlet of the quencher. Due to the high temperature, high water content and complex compo...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/08
Inventor 周丛巴海鹏王国清张兆斌陈硕薛丽敏南秀琴司宇辰杜志国
Owner CHINA PETROLEUM & CHEM CORP
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