Gas on-line sampling and pretreatment method and equipment for intermittent circulating gas producing technology
A pretreatment, intermittent technology, applied in the preparation of test samples, sampling devices, etc., can solve the problems of component interference, large restrictions, slow gas extraction, etc., to achieve high performance, reduce use and maintenance costs, and low cost Effect
Active Publication Date: 2014-06-04
SHANGHAI RES INST OF CHEM IND +1
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Problems solved by technology
However, compared with general-purpose instruments, the use of gas online analysis instruments is more restricted by working conditions. The positive / negative pressure environment of the gas sampling point, the moisture and dust in the sample gas, etc. will affect the normal use of the analyzer. , in addition, the online analytical instrument often has an inherent response time of the instrument itself according to the different detection principles. Therefore, in order to overcome the influence of the environment and the instrument itself, it is necessary to design and configure a dedicated sample gas treatment device for different process conditions, which requires high requirements.
[0003] The cyclic catalytic cracking process is a relatively important process in the chemical production process. Its common feature is that the entire production process is alternately carried out by the preparation period and the production period. For this production process, if continuous on-line sampling pretreatment is adopted The device will have the following two shortcomings. First, the sampling time is limited by the production time and the response time of the instrument itself. The gas sampling will be too slow, and the gas supply of the analysis instrument cannot be guaranteed. The second is the composition of the sampled gas. Will be interfered by the sample gas composition of the previous collection cycle
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[0034] The gas on-line sampling pretreatment equipment for the intermittent cycle gas production process, its structure is as follows figure 1 As shown, the equipment is mainly composed of three parts: sampling pretreatment mechanism A, analysis and sampling mechanism B and sampling control mechanism C.
[0035] Among them, the structure of sampling preprocessing mechanism A is as follows: figure 2 As shown, it includes the cyclone separator 1, the sample gas emptying device and the gas storage tank 8, and the sampling pretreatment mechanism is mainly used to realize on-site gas sampling, pretreatment and timing blowdown of the cyclone separator.
[0036] The structure of cyclone separator 1 is as image 3 As shown, the inlet pipe 2 of the cyclone separator is located at the upper part of the cylinder structure and enters the cylinder along the tangential direction. For 90 degree elbow. The dust-laden gas enters tangentially from the intake pipe, and is restrained by the w...
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The invention relates to a gas on-line sampling and pretreatment method and equipment for an intermittent circulating gas producing technology. The evacuating stage is that a gas sample evacuating device is used for evacuating a gas sample storing device; the sampling stage is that the negative pressure environment formed in the gas sample storing device is utilized to sample a on-site positive / negative pressure gas source, and the gas sample filtered through a gas-solid / gas-liquid separating device enters the gas sample storing device; the analyzing stage is that the gas sample extracted by an analyzing and sampling device is filtered through a dedusting filter device and transmitted to an on-line analytical instrument for analysis; and the timing discharging stage is that the liquid-solid mixture accumulated in the gas-solid / gas-liquid separating device is discharged. Furthermore, the invention also discloses a gas on-line sampling and pretreatment device used for the intermittent circulating gas producing technology, which includes a sampling and pretreatment mechanism, an analyzing and sampling mechanism and a sampling and control mechanism. The gas on-line sampling and pretreatment method and equipment solve the difficulty for gas on-line positive / negative pressure sampling in the intermittent circulating gas producing technology, and further, the gas on-line sampling and pretreatment equipment is easy to maintain, and has simple structure, low cost and reasonable configuration.
Description
technical field [0001] The invention belongs to the technical field of detection equipment, and specifically relates to a gas online sampling pretreatment method and equipment applied to an intermittent cycle gas production process, which can be applied to gas components corresponding to the intermittent cycle gas production process in industries such as gas, chemical, and petrochemical industries detection. Background technique [0002] The application of analytical instruments, especially online analytical instruments, in the industrial production process is the development trend in the field of testing equipment in the future. In recent years, the online analysis technology of gas composition is developing rapidly in the world, and the reaction process is controlled by directly measuring the gas composition. It is more efficient and accurate than traditional indirect measurement methods. However, compared with general-purpose instruments, the use of gas online analysis i...
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IPC IPC(8): G01N1/22G01N1/28
Inventor 张剑蔡国光汪慎黄波
Owner SHANGHAI RES INST OF CHEM IND