Method for improving filtering performance of dry spray booth

Abstract

The invention provides a method for improving the filtering performance of a dry spray booth. The method includes the following steps of: forming paint particle-containing to-be-filtered airflow whichdirectionally flows from a spray booth to a windward opening of a filtering chamber through the pressure difference between the spray booth and the filtering chamber; providing an adsorption structure arranged in the flowing direction of the to-be-filtered airflow, and carrying out first-stage filtration; providing a nozzle capable of spraying powder, and enabling the nozzle to spray powder to perform second-stage filtration; settling the powder sprayed out of the nozzle on a storage structure with a plurality of through holes through gravity, providing a vibrator capable of driving the storage structure to vibrate, and under the action of the vibrator, discharging the powder accumulated on the storage structure through the through holes; and providing a filter for carrying out third-stage isolation filtering to obtain clean air, and exhausting the clean air from an air outlet of the filtering chamber. According to the invention, the filtering performance of the dry spray booth is improved by reducing the phenomena of caking and blocking of powder and paint.

Description

technical field [0001] The invention belongs to the technical field of spray paint mist filtration, and in particular relates to a method for improving the filter performance of a dry spray paint booth by reducing the agglomeration and clogging of lime powder and paint. Background technique [0002] According to the way of paint mist collection, spray booths can be divided into wet spray booths and dry spray booths; wet spray booths can be divided into Venturi type, water cyclone (power tube type), water curtain type, etc. to capture paint with water. Fog spray booths, dry spray booths can be divided into traditional filter cotton dry spray booths, lime powder dry spray booths and new dry carton spray booths. In the current automotive coating industry, 2K varnishes are widely used due to their good performance. However, due to their high viscosity and easy curing, 2K varnishes pose challenges to the dry spray booth technology that uses lime powder to capture paint mist. [...

AI Technical Summary

Problems solved by technology

[0004] 1. The service life of the filter is low - the paint mist solidifies on the surface of the filter and adheres firmly;

[0005] 2. The amount of lime powder is relatively large;

[0006] 3. The 2K varnish mist solidifies and agglomerates in the filter system of the dry spray booth, which makes it difficult to clean and clean, and the maintenance cost remains high;

[0007] 4. Lime powder is agglomerated, and the failure rate of equipment remains high. Long-term shutdown affects production efficiency

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