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Application of high temperature resistant dust removal bag in dust removal equipment

浏览 Author Admin Browse Published 18/12/21

Application of high temperature resistant dust removal bag in dust removal equipment

The smoke exhaust of metallurgical enterprises is generally dusty, and the temperature is often above 1000 degrees, but the filter material in the bag filter can only withstand lower temperatures. For example, the cotton filter material has a temperature resistance of 100 degrees. The temperature resistance of synthetic resin such as Lun is 250 ° C, and the temperature resistance of glass fiber is 270 °. In order to protect the filter material, a gas cooler or wild air must be installed between the metallurgical furnace and the bag filter. If the two methods are used together, the investment is too large. If auxiliary wild air equipment is added, the filtering equipment is generally enlarged 2-4 times, the reason is to ensure good dust removal within a large filtration load. For example, for exhaust gas containing ZnO, such as the filtering air volume of the filter material is 60-40m3 / m '. H, in order to solve this problem, the amount of filter material needs to be increased, resulting in increased costs.

In order to overcome these shortcomings, this equipment has studied the dust removal filter that does not need to be cooled before the high temperature flue gas enters the filter, and based on this.

In order to solve this problem, a non-metallic material that is particularly resistant to high temperatures is proposed as a filter material. The filter is composed of a temperature-resistant filter layer with a temperature resistance of 800 degrees or more. After the satin is burned, the filter material can withstand a temperature of about 1200 degrees. The filter material is preferably graphitized with organic matter. Jing Shi

After inking, it has amazing heat resistance. The temperature can reach 3000 ℃ in a non-oxidizing atmosphere. The heat resistance in an oxidizing atmosphere is also very good. The filter material with poor heat resistance can be composed of mineral wool fibers, It consists of smelted cotton fiber or slag cotton fiber. In this case, the filter material layer is composed of a hard or soft surface layer, felt or floc. The felt can be made in the form of a filter bag.

In the case of placing in a pipe, the filter has a shell-shaped support structure in the dust-containing flue gas pipe in order to maintain the filter material layer.

The filter can be placed in a pipeline, especially used in a heat generating gas duct of a coal gasification device of a gasification device equipped with a carbon support in molten iron, a thermometallurgical melting reactor or other hot gas duct. Hanging materials can usually be recovered and calcined. Otherwise, they will be melted in the exhaust gas or hot-melt reactor. The hot gas generated in the reactor should be purified. The exchange of new materials and dust-containing filter materials can be performed continuously or intermittently get on.

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