A method and device for drying wet rubber powder using solar energy

Abstract

The invention provides a method for drying wet rubber powder through solar energy. The method comprises the steps of manufacturing of low-humidity rubber powder, solar heating of medium oil, forming of heating hot air through heat exchange, wet rubber powder rotary drying, waste heat recovery and the like. According to the method for drying the wet rubber powder through the solar energy, the temperature of drying hot air can be reduced to range from 150 DEG C to 170 DEG C, and the drying time can be shortened to range from 3 min to 5 min; meanwhile, the situation that sulfur-containing pollution is generated by the rubber powder due to the too high drying temperature is avoided, no pollutant is discharged, and the structure of rubber molecules is prevented from being damaged by high-temperature drying; compared with a traditional hot air flashing furnace drying manner, production energy consumption is greatly reduced; and through the adoption of the method for drying, electric energy consumed by finished products per ton is only 30 kilowatt hours and is far lower than 100 kilowatt hours consumed by finished products per ton in a traditional hot air flashing furnace. The invention further provides a device for drying the wet rubber powder through the solar energy. The device is used for achieving the above method for drying.

Description

technical field [0001] The invention relates to the technical field of rubber powder drying, in particular to a method for drying wet rubber powder by utilizing solar energy. Background technique [0002] In the waste tire recycling industry, tires are mainly crushed and ground into 20 to 200 mesh powder for utilization. The preparation method of rubber powder is divided into dry preparation and wet preparation, as long as the dry preparation is to directly grind the dry tire block, as the publication number is that CN104002396A discloses a kind of preparation method of regenerated rubber powder, its essence is to adopt dry The method is used to prepare rubber powder from waste tires. The rubber is roughly crushed by a pulverizer and ground into 30-32 mesh rubber powder after removing iron filings. Although the dry method is quick and has low energy consumption, it will produce High temperature and odor, and under high temperature conditions will destroy the molecular struc...

AI Technical Summary

Problems solved by technology

However, the rubber powder prepared by the wet method needs to be dried after grinding, especially the traditional wet grinding. Since the rubber particles are simply mixed with water and then directly ground, the relative humidity of the wet rubber powder produced by grinding is generally 15%-20. %, which adds a lot of drying burden to the subsequent drying. According to actual production statistics, the relative humidity of wet rubber powder increases by 1%, and the subsequent drying cost needs to increase by 5%. However, the amount of water in the grinding process of rubber particles cannot be added too little , in actual production, the weight ratio of wet rubber powder to water is generally about 2:1, otherwise it will not achieve the effect of eliminating the high temperature and odor generated during the crushing process and reducing the damage to the molecular structure of rubber

[0004] In addition, hot air flash furnaces are currently used to dry wet rubber powder with natural gas as a heat source. Currently, hot air flash furnaces are used to dry wet rubber powder with natural gas as a heat source. Selection and transportation, not only the high energy consumption in the drying process, but also the huge product cost; 2) Large air volume and high air inlet temperature are required in the furnace body and the transportation pipeline, otherwise the moisture content index of the product will easily exceed the standard; 3) Can The consumption is high, and the drying moisture of wet rubber powder is not easy to control; 4) Since high-temperature hot air must be used in the drying process, too high drying temperature will cause the sulfur-containing pollutants in the rubber powder to be discharged together with the exhaust gas generated during the drying process, polluting environment, and high temperature will destroy the structure of rubber molecules; 5) Long drying time, low efficiency, large equipment footprint, and great noise during work

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