Suspended-state outer-circulation drying system

Abstract

Disclosed is a suspended-state outer-circulation drying system. The system comprises a drying device, a recycling separator and a cyclone separator; a first air locking valve and a first-stage scattering device are arranged on a first feeding pipe at a material feeding end of the drying device; a first material disperser is arranged at a material feeding opening; a second-stage scattering device is arranged at the lower part of the drying device; an air inlet pipe and an ash collecting chamber are arranged under the second scattering device; a material discharging pipe which is equipped with a second air locking valve is arranged at the bottom of the ash collecting chamber; the recycling separator is connected with a top outlet of the drying device, and ash-containing gas which flows out of the drying device enters the recycling separator tangentially; a first air outlet is arranged at the top of the recycling separator; a second feeding pipe which is equipped with a fourth air locking valve is connected with a bottom outlet of the recycling separator; the cyclone separator is connected with the first air outlet, and the ash-containing gas enters the cyclone separator tangentially; a second air outlet is arranged at the top of the cyclone separator; and a third feeding pipe which is equipped with a fifth air locking valve is connected with a bottom outlet of the cyclone separator. In the drying system provided by the invention, an outer-circulation system is used to separate, scatter and continue to dry large particles, so that the drying capacity per unit volume of a dryer is increased, material are dried completely, and heat efficiency of the system is increased.

Description

technical field [0001] The invention belongs to the technical field of industrial sludge treatment, in particular to a suspended external circulation drying system. Background technique [0002] With the rapid development of industrial production, environmental pollution is becoming more and more serious. However, people's awareness of the protection and improvement of the living environment has been continuously strengthened, and the laws and regulations related to environmental protection also have strict regulations on the discharge standards of wastewater. Various production enterprises and factories generally establish corresponding wastewater treatment facilities. The increase of wastewater treatment facilities is bound to increase the output of industrial sludge. Industrial sludge is the sedimentation aggregate produced by industrial wastewater after sewage treatment. Industrial sludge generally contains toxic and harmful components. The newly generated sludge is b...

AI Technical Summary

Problems solved by technology

Common drying equipment is not suitable for high-humidity and high-viscosity materials, and the multi-structure is huge and complex, with large heat loss, low thermal efficiency, low efficiency and high energy consumption, and the final moisture content is uncontrollable

Images