Internal material returning guniting granulator

Abstract

The invention relates to an internal material returning guniting granulator comprising a granulator rotary drum; an air inlet and a spray gun are arranged at the head of the rotary drum; the granulator rotary drum comprises a granulation section, a drying section and a screening section; shovelling plates and main material returning spirals are arranged in the granulation section and the drying section; an electric heating net is arranged in the drying section; the electric heating net is fixed to the inner wall of the rotary drum through a support, a classifying cone and a rotary drum screenare arranged in the screening section, the classifying cone is of a screen structure, the large-opening end of the classifying cone communicates with the drying section, the small-opening end of the classifying cone communicates with the rotary drum screen, and an auxiliary material returning spiral capable of returning fine materials screened by the rotary drum screen into a transition section isarranged on the inner wall of the screening section. The granulator is mainly used for resource utilization of activated sludge of a sewage treatment plant, is less in equipment and high in efficiency, has the characteristics of reducing the final sludge disposal amount, improving the soil structure, improving the soil fertility and being high in benefit, and has extremely high application valuein the aspects of sludge reduction, landscaping, agricultural fertilizer filling and the like.

Description

technical field [0001] The invention relates to an internal material-returning spray granulator, in particular to a granulator for the utilization of sludge resources. Background technique [0002] At present, the shotcrete granulation equipment is mainly disc granulator, centrifugal granulator, horizontal cylinder granulator, etc., which can only complete the granulation work with a single function. If the overall process of granulation, drying, internal material return, and crushing is to be carried out, other equipment is required to assist the formation of a process system to complete the process, which requires a large one-time investment, more equipment, larger floor space, and excessive energy consumption. big. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an internal material-returning spray granulator to solve the problems raised in the above-mentioned background art. [0004] In order to achieve the above purpose, the pres...

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Problems solved by technology

[0002] At present, the spray granulation equipment is mainly disc granulator, centrifugal granulator, horizontal cylinder granulator, etc., and the single function can only complete the granulation work.

If the overall process of granulation, drying, internal return, and crushing needs other equipment to form a process system to complete the process, the one-time investment is large, the equipment is large, the floor area is large, and the energy consumption is excessive. Big

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