Efficient and low-pollution rural waste pyrolysis method and device

Abstract

The invention discloses an efficient and low-pollution rural waste pyrolysis method and device. The rural waste pyrolysis device comprises an outer cylinder, a middle cylinder and an inner cylinder, wherein the outer cylinder, the middle cylinder and the inner cylinder are sequentially arranged in a sleeving mode from outside to inside; the inner cylinder serves as a first flue gas passage, a cavity formed between the inner cylinder and the middle cylinder serves as a waste pyrolysis cavity, and a cavity formed between the middle cylinder and the outer cylinder serves as a second flue gas passage; spiral blades used for pushing the waste are arranged on the outer circumferential wall surface of the inner cylinder; spiral flow guide blades are arranged on the outer circumferential wall surface of the middle cylinder so that flue gas can flow in the second flue gas passage according to the spiral flow guide track of the spiral flow guide blades; the high-temperature flue gas flows through the two flue gas passages to transfer heat to the waste pyrolysis cavity and heats the waste inside the waste pyrolysis cavity; and the waste is pyrolyzed as the waste moves ahead in the waste pyrolysis cavity under the pushing of the spiral blades. According to the pyrolysis process of the device, products which are generated after the waste is subjected to pyrolysis can be combusted and reused, and on one hand, the products can be used for generating the high-temperature flue gas to provide heat to a waste drying device and a waste pyrolysis device, on the other hand, the products can be used for residential life as well as industrial and agricultural production.

Description

technical field [0001] The invention relates to garbage treatment, in particular to a high-efficiency and low-pollution rural garbage pyrolysis method and device thereof. Background technique [0002] Disposal of domestic and production waste of rural residents has always been a difficult problem, and the direct incineration treatment method will even aggravate the smog situation in the north. Municipal solid waste treatment technologies mainly include landfill, composting, and heat treatment technologies. The treatment of rural garbage is still in the backward stage of scattered disposal or incineration. Some garbage is discarded on the roadside and directly exposed to the air, resulting in a messy environment; some garbage is incinerated, billowing black smoke and polluting the atmosphere. [0003] At present, the commonly used waste heat treatment technologies include direct incineration and pyrolysis gasification. Direct incineration is a solid-state heterogeneous comb...

AI Technical Summary

Problems solved by technology

Direct incineration is solid heterogeneous combustion, which has problems such as insufficient combustion and uneven temperature distribution, and the efficiency is low

Images