Large horizontal tunnel kiln spiral continuous dry-type anaerobic fermentation equipment

Abstract

The invention discloses large horizontal tunnel kiln spiral continuous dry-type anaerobic fermentation equipment and belongs to the technical field of high temperature dry-type fermentation. The equipment comprises a tunnel kiln inner cavity fixed to an equipment foundation, wherein a heat exchange plate with a steam heating pipe is mounted in an arc-shaped outer cavity, and insulating layers are arranged on the outer portions of the tunnel kiln inner cavity and a tunnel kiln inner cavity supporting wall; a stirring and pushing spindle rotating at a low speed is mounted in the tunnel kiln inner cavity and drives tens of stirring and pushing blades to rotate, the stirring and pushing blades are mounted on the radial surface of the outer circle of the spindle and distributed according to a spiral track in the axis direction, and reaction materials mixed with biogas slurry enter one end of the tunnel kiln inner cavity through a feeding solid pump and a feeding pipe with a spiral material preheating coil and are pushed towards an upper biogas residue and slurry discharge port and a lower biogas residue and slurry discharge port in the axial direction and delivered into a solid-liquid separator through a discharging solid pump. The equipment has the advantages of a dry-type fermentation process, the reaction materials can be fed continuously, a large amount of biogas can be obtained, and the equipment is suitable for treatment of ropy organic materials in municipal refuse.

Description

technical field [0001] The invention belongs to the field of dry anaerobic biogas fermentation technology and technology, and is suitable for the field of biogas production such as organic garbage, breeding excrement, crop straw and sludge in urban domestic garbage. It particularly relates to a large-scale horizontal tunnel kiln type spiral continuous dry anaerobic fermentation equipment. Background technique [0002] Among the current sources of environmental pollution in China, urban waste is one of the huge sources of pollution. China produces about 400 million tons of urban domestic waste every year, and about 10 million tons of kitchen waste, accounting for about one-third of the world's total. With the acceleration of my country's urbanization process and the improvement of people's living standards, urban domestic waste is still increasing at a rate of about 5%-8% per year. The siege of garbage is sounding the alarm for Chinese cities, [0003] Two-thirds of the cou...

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Problems solved by technology

[0013] 5) Due to the low reaction concentration, the total volume of the anaerobic reaction tank needs to be large

[0014] 6) The surface of the reaction liquid is easy to form scum and crusting

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