Catalyst screening method during preparation of sulphuric acid

Abstract

The invention discloses a sulfuric acid catalyst screening method, which comprises: the catalyst is placed in a sealed double-layer linear mechanical vibrating screen to be screened level by level and the dusts generated during screening are filtered by a dust catcher; the screened thin catalyst grains and the catalyst dusts collected by the dust catcher are bagged respectively for later recycling. The application of the method can dramatically enhance the work environment and the dust density of the screening work zone is less than 3mg / m<3>, thus effectively protecting the health of workers. The improvement of environment can reduce the investment cost and the total screening cost can be saved by 5 to 10 percent, thus enhancing the economic benefit. The screening time can be dramatically shortened so as to obtain more time for the starting of sulfuric acid apparatus and guarantee smooth completion of the manufacturing task, thus having positive practical meaning and high popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid production, and in particular relates to a method for screening sulfuric acid catalysts. Background technique [0002] At present, in the screening of sulfuric acid catalysts, the process of screening with simple fixed sieves under the blowing of axial flow fans is generally adopted, such as figure 1 shown. This method has the following disadvantages: the screening efficiency is low, mainly manifested in the poor separation effect between the catalyst and the dust, and the dust is entrained in the catalyst to be used after screening. The labor intensity is high, and the screen surface needs to be vibrated manually during the screening process. The dust content in the operation area is high, the highest local concentration: ~35g / m 3 , 1-5g / m in the working area 5-10m away from the sieve 3 , the chance of human inhalation increases. The flying dust in the work area not only pollutes the s...

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Problems solved by technology

In addition, due to the poor screening effect of the catalyst, the conversion rate, system output and total sulfur utilization rate of the sulfuric acid conversion process are seriously affected, and the frequency of device maintenance is increased, resulting in an increase in production costs

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