Device and method for integrated treatment of kitchen waste energy and fertilizer

Abstract

The invention provides a device for integrated treatment of kitchen waste energy and a fertilizer, wherein an outlet of a heat conduction oil pipeline of a steam spinning damp heat pretreatment tank is connected with a three-phase heat preservation device, a steam outlet is connected with a heat accumulator, and a three-phase heat exchange heat preservation unit is used for providing a heat preservation heat source for an anaerobic fermentation tank and an aerobic fertilizer preparation device. A bottom discharge port of the steam spinning damp heat pretreatment tank is connected with a stack screw dewatering machine by virtue of a discharging pump. When the stack screw dewatering machine separates solids and liquid of a material, a liquid material outlet is connected with the anaerobic fermentation tank by virtue of a delivery pump, the generated biological gas is collected into a biomass gas purification system by virtue of a gas outlet at the top of the tank body, and the bottom discharge port is connected with an aerobic fertilizer preparation system by virtue of a slurry pump. The residual biogas residues are pumped out from the bottom and conveyed into an aerobic fermentation device by the slurry pump, and then are mixed with a solid-phase material for aerobic fertilizer preparation. The invention also discloses a method for treating kitchen wastes by using the device. By using the device and the method, high-value utilization of the kitchen wastes is realized, the biogas yield is significantly improved, and the secondary pollution of biogas residues and the like is avoided.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to a combined device for integrated treatment of kitchen waste energy and fertilizer. [0002] The invention also relates to a method for integrated treatment of kitchen waste energy and fertilizer by using the device. Background technique [0003] In recent years, with the improvement of living standards and the rapid development of the tertiary industry, the amount of kitchen waste in my country has increased year by year. The average content of kitchen waste in the domestic waste of the seven major cities in the country has reached about 50%, which is domestic waste. important parts of. In some areas, kitchen waste is simply piled up, breeding mosquitoes and flies, producing stench, causing environmental pollution, and posing a great risk to human health. The reduction and resource utilization of kitchen waste has become an urgent problem to be solved. Since the ...

AI Technical Summary

Problems solved by technology

[0004] Due to the high oil and high organic matter content of kitchen waste, which inhibits microbial activity, the traditional anaerobic fermentation and aerobic fertilizer production processes are prone to acidification and collapse, making it difficult to operate stably and have low resource utilization efficiency.

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