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Improved method for increasing cold box inlet carbon dioxide analysis speed

A carbon dioxide and cold box technology, which is applied in the direction of analyzing materials, analyzing gas mixtures, measuring devices, etc., can solve the problems of affecting the adjustment load, freezing blockage of cold boxes, etc., and achieves the advantages of facilitating load adjustment, improving analysis speed, and shortening sampling and analysis time Effect

Inactive Publication Date: 2021-03-16
HEILONGJIANG JIANLONG CHEM
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AI Technical Summary

Problems solved by technology

When the decarburization device fluctuates, the laboratory needs to take carbon dioxide from the inlet of the cold box for analysis. It takes 20-30 minutes to obtain the test data after sampling. The long time not only affects the adjustment of the load by the central control operator, but also easily causes the cold box to freeze.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0007] An improved method for increasing the carbon dioxide analysis speed at the entrance of the cold box, the improved method is: adding a sampling valve and a sampling line at the entrance of the cold box, connecting the original 400# sampling line and the sampling line at the entrance of the cold box in parallel to the online analysis of carbon dioxide. After the solenoid valve is installed on the parallel pipeline, the solenoid valve can be switched at any time. Finally, a switch is installed on the central control DCS. The switch is used to control the solenoid valve. After the solenoid valve is activated, the carbon dioxide at the inlet of the cold box can be monitored online.

[0008] The sampling pipeline at the inlet of the cold box is added and connected in parallel to the existing carbon dioxide online analysis, which can be manually switched on site to monitor the carbon dioxide at the inlet of the cold box. Adding remote control, the central control DCS can switch...

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Abstract

The invention belongs to the technical field of steel production, and particularly relates to an improved method for increasing the cold box inlet carbon dioxide analysis speed. The method comprises the following steps: adding a sampling valve and a sampling pipeline at the inlet of a cold box, connecting the original sampling pipeline and the sampling pipeline at the inlet of the cold box in parallel to carbon dioxide online analysis, adding an electromagnetic valve on the parallel pipeline, switching the electromagnetic valve at any time, finally, additionally arranging a selector switch, used for controlling the electromagnetic valve, on a central control DCS, and enabling the electromagnetic valve to act to achieve online monitoring of carbon dioxide at the inlet of the cold box. The carbon dioxide sampling analysis time at the inlet of the cold box is shortened, the central control DCS can monitor data at any time, and load adjustment during production fluctuation is facilitated.

Description

Technical field: [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to an improved method for improving the carbon dioxide analysis speed of a cold box inlet. Background technique: [0002] The carbon dioxide index in the LNG production process requires that the inlet of the cold box is ≤ 50ppm, and the designed online analysis point is at the outlet of the 400# decarbonization device. During the production process, the carbon dioxide value is usually higher than 50ppm after the decarbonization device fluctuates, and the raw material gas enters the 600# dehydration device after exiting 400# and then enters the cold box. When the decarburization device fluctuates, the laboratory needs to take carbon dioxide from the inlet of the cold box for analysis. It takes 20-30 minutes to obtain the test data after sampling. The long time not only affects the adjustment of the load by the central control operator, but also easily c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N33/00
CPCG01N1/22G01N33/0004
Inventor 吴佳吉王晨
Owner HEILONGJIANG JIANLONG CHEM
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