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An online near-infrared analysis preprocessing device and method

A pretreatment device and near-infrared technology, applied in the field of ethylene cracking, can solve the problems affecting the light absorption of the sample, impurity adsorption, result deviation, etc., and achieve the effects of reducing environmental pollution, low manufacturing cost, and stable instrument baseline.

Active Publication Date: 2016-12-28
PETROCHINA CO LTD
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Problems solved by technology

The near-infrared spectrum contains the vibration information of C-H, O-H, N-H and other chemical bonds, and water molecules also have a strong absorption band in the near-infrared spectrum region. During the detection process of the near-infrared spectrum, water becomes an impurity that interferes with the analysis of the spectrum region. , water must be removed during sample analysis to improve measurement accuracy; when measuring liquid samples, there will be air bubbles and impurities adsorbed on the wall of the detection cell, which will affect the absorption of light by the sample and cause deviations in results. These factors must be eliminated to improve measurement accuracy

Method used

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  • An online near-infrared analysis preprocessing device and method
  • An online near-infrared analysis preprocessing device and method
  • An online near-infrared analysis preprocessing device and method

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Embodiment 1

[0040] Example 1: Such as figure 1 , figure 2 , image 3 As shown,

[0041] The process of an online near-infrared analysis preprocessing device is as follows figure 1 As shown, the top end of the first-stage sedimentation filter 1 has a first valve 6, a second valve 7 and a third valve 8 connected; the bottom end of the first-stage sedimentation filter 1 has a fourth valve 10 and a fifth valve 11 connected , The other end of the third valve 8 is connected to the first meter 9;

[0042] The valve connection structure of the second-stage sedimentation filter 2 is the same as that of the first-stage sedimentation filter 1, and the valve of the second-stage sedimentation filter 2 is at the other end of the corresponding valve of the first-stage sedimentation filter 1. After connection: the other end of the second valve 7 is connected to the sixth valve 13, the other end of the fifth valve 11 is connected to the seventh valve 12, and the other end of the first valve 6 is connected ...

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Abstract

An on-line near-infrared analysis pretreatment device and method belong to the technical field of ethylene cracking. Including sedimentation filter, filter dehydrator, oil-water heat exchanger and flow detection cell module components; sedimentation filter is connected to the filter and enters the secondary dehydration filter device; the dehydration filter has a shell and a sintered metal filter element; the oil-water heat exchanger has Convoluted coil; the flow detection cell module includes a constant temperature box and a flow cell part. The constant temperature module adopts a building block aluminum block structure, and an electric heating cable is embedded in the middle for heat tracing. The invention has the advantages of stable baseline and low noise; effectively removes air bubbles, impurities and moisture, and has good analysis result reproducibility; good sample recovery effect, reducing environmental pollution; low manufacturing cost, convenient and practical installation.

Description

Technical field [0001] The invention relates to an online near-infrared analysis pretreatment device and method, and belongs to the technical field of ethylene cracking. Background technique [0002] The characteristics of the online near-infrared analysis technology of ethylene cracking raw materials are: fast analysis speed, can provide accurate real-time analysis data within a few minutes; cost-effective, a near-infrared analyzer can measure several indicators at the same time; that is, offline analysis It can also be tested online. The state of the analytical instrument always changes within a certain range. This variation range depends on changes in external conditions (such as temperature), impurities that interfere with the analysis of the spectrum, and the analysis conditions of the instrument, which directly affect the reliability of the prediction results. [0003] Near-infrared analysis technology has strict requirements on temperature. In order to eliminate errors, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 邢龙春陈为民王瑞罗资琴陈世龙王俊梅徐海燕刘沛刘海生李婷张佳亮何之源卢勇李延马琳娜杜春燕
Owner PETROCHINA CO LTD
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