Catalyst sampling and its safety protection device used in polyethylene production

Abstract

The invention relates to an analytical sampling device for a medium in a chemical production device. A catalyst sampling and its safety protection device used in polyethylene production is equipped with a sampling valve, a protection box, a nitrogen replacement system, and a safety protection system. A manual valve and the sampling valve are positioned inside the protection box. And the manual valve is installed between the sampling valve and a sampling bottle. For the nitrogen replacement system, a nitrogen inlet pipe and a nitrogen outlet pipe are connected into the protection box. A nitrogen pipe of the protection box is provided with a pressure gauge and a flowmeter. A quick connector of the sampling bottle is connected to an exhaust pipe. The protection box is equipped with an electronic door lock, which is in connection with a warning light. And an oxygen content analyzer is mounted inside the protection box. With the device provided in the invention, the catalyst sampling is safe, and the design scheme of nitrogen purging and sample replacement is perfect, thus ensuring safety production. And operators are not in direct contact with the catalyst medium, so that the personal safety of the production operators is guaranteed. A great hidden danger in catalyst sampling of a polyethylene production unit is eliminated.

Description

technical field [0001] The invention relates to an analysis and sampling device for a medium in a chemical production device. Background technique [0002] In the slurry method polyethylene production unit, it is necessary to detect and analyze the activity of the catalyst medium, and determine the amount of catalyst added to the production chemical reactor according to the catalyst activity data of the analysis and sampling, so as to ensure the quality of the produced product and process safety. However, the process of sampling catalysts in production is difficult and dangerous. The catalyst contains triethylaluminum and active titanium components. Among them, triethylaluminum has a low spontaneous ignition point and will burn when it encounters air; it has strong oxidizing properties and will undergo violent oxidation and hydrolysis when it contacts with water. explode. If there is leakage, exposure to the atmosphere will cause danger to the safety of the production devi...

AI Technical Summary

Problems solved by technology

If there is leakage, exposure to the atmosphere will cause danger to the safety of the production device and cause great harm to the operator

Existing catalyst sampling device is simple, adopts conventional airtight method to sample, needs to replace material every time sampling, causes catalyst waste easily, and sampling quality is not guaranteed, although a nitrogen purging line is arranged at the entrance of sampling bottle, improper sampling will result in Will leak, very dangerous

Images