High-temperature aerobic fermentation method and device thereof

Abstract

The invention relates to a high-temperature aerobic fermentation method and a device thereof. According to the invention, materials are arranged at multiple layers in the height direction for layer by layer and step by step fermentation from bottom to up, and each layer adopts a low composting height which follows the principle that the materials have unobvious self-compaction and permeability. The materials on each layer are designed as multiple parallel strip piles, and gaps are arranged among the strip piles for circulation of air, exhaust gas generated from fermentation and the materials among layers. Due to the multiple layers of materials and low composting height of each layer, permeability of the materials is improved, fermentation time is shortened through layered fermentation, and service efficiency of a unit area is enhanced. The device has retainer plates designed as long strips, so that the materials can form strip piles on the plates, thus benefiting gas and moisture diffusion. The design of multilayer and low composting height makes the materials move conveniently with or without a reversal and pushing device, and also reduces energy consumption.

Description

technical field [0001] The invention relates to a composting method and device using a multi-layer support plate type. Background technique [0002] For waste, such as high-temperature aerobic fermentation of garbage and sludge, the commonly used methods and forms are generally strip-type compost heaps or fermentation bins (tanks). [0003] In these two methods, the materials are left still or supplemented by turning and throwing operations, and oxygen is supplied to the system through natural ventilation or forced ventilation during the fermentation process. In the composting process, the turning and throwing operation usually adopts fixed turning and throwing (the material does not produce obvious displacement with the turning and throwing operation) or shift turning and throwing operation. The area or tank is moved several meters in the direction of discharge, and the vacated place is supplemented with new materials, and the transferred materials are transported away as ...

AI Technical Summary

Problems solved by technology

[0005] 1. The processing time is long, the workload is large, and the material transportation volume in the factory is large;

[0006] 2. The stack height and air permeability of the material are always contradictory. In order to improve the processing capacity per unit area, people hope that the material can be stacked higher, but due to the self-compacting of the material, especially for the material with a high moisture content, the stack The high increase also brings the problems of poor air permeability and increased ventilation resistance, especially when dealing with materials with high moisture content, such as sludge composting, the self-compaction of the material is serious, making the pile dense and poor in air permeability, resulting in oxygen supply. Insufficient, severe odor and long residence time (decreased processing capacity), etc.;

[0007] 3. When the moisture content of the material is high and the initial stage of fermentation, the turning and throwing operation will cause the material to be denser under the action of mechanical force. In addition, turning and throwing is also a high energy consumption and causes odor. and discharge process;

[0008] 4. Forklifts, loading trucks, or conveying and distributing equipment are used for material feeding and production. The former will cause excessive vehicle operation in composting plants with large processing capacity, while the latter has complex equipment and high maintenance requirements.

Images