Device and method for heating and drying household garbage through steam with gas circulation

Abstract

The invention provides a device for heating and drying household garbage through steam with gas circulation. The device comprises a steam heating pipe type rotary cylinder dryer which is cylindrical, the left end of the steam heating pipe type rotary cylinder dryer is a feeding end, the right end of the steam heating pipe type rotary cylinder dryer is a discharging end, a feeding device is installed at the feeding end of the steam heating pipe type rotary cylinder dryer, the steam heating pipe type rotary cylinder dryer is obliquely mounted, a certain included angle is formed between the steam heating pipe type rotary cylinder dryer and the horizontal plane, the side of the feeding end is high, and the discharging end is low; a garbage feeding hole is formed in the feeding device; and a circulating gas inlet is further formed in the steam heating pipe type rotary cylinder dryer, a hammering device is arranged outside a cylinder body of the steam heating pipe type rotary cylinder dryer, heating pipes are arranged in the cylinder body, a garbage discharging outlet is formed in the lower portion of the discharging end of the steam heating pipe type rotary cylinder dryer, a circulating gas outlet is formed in the upper portion of the discharging end, and a steam distribution joint, a steam inlet and a steam outlet are formed in the center of the right end of the cylinder body of the steam heating pipe type rotary cylinder dryer.

Description

technical field [0001] The invention belongs to the field of domestic waste treatment, and in particular relates to a device and method for heating and drying domestic waste by steam with gas circulation. Background technique [0002] In recent years, technologies such as domestic waste incineration or pyrolysis have developed rapidly. These technologies are faced with the problems of high moisture content and low calorific value in waste, and difficult treatment of landfill leachate when dealing with domestic waste. It is necessary to dry and dehydrate the garbage. The commonly used domestic waste dehydration treatment methods in engineering are: [0003] The first is to use aging or extrusion dehydration, but after dehydration by this method, the moisture content in the garbage is still high, and the dehydration efficiency is low. [0004] One is to use a drum dryer to dry. The garbage is mixed with hot air in the drum, the water in the garbage is heated and evaporated, ...

AI Technical Summary

Problems solved by technology

However, a large amount of steam needs to be discharged during the drying process. This method will lose more energy, and the operation process is intermittent, which is not conducive to continuous large-scale production.

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