Device and method for realizing thermal-hydrolysis fermentation treatment in rotation way

Abstract

The invention provides a device and a method for realizing thermal-hydrolysis fermentation treatment in a rotation way. The device provided by the invention comprises a preheating unit, a rotary thermal-hydrolysis unit and a mixing fermentation unit. The method provided by the invention comprises the following steps that 1, an organic biomass raw material is preheated by flash-off steam in a preheating tank until a temperature of the organic biomass raw material is less than or equal to 105 DEG C, and then is orderly fed into all rotary thermal-hydrolysis reactors; 2, orderly through all the rotary thermal-hydrolysis reactors, the preheated organic biomass raw material is mixed with high pressure steam in a rotation way and is subjected to thermal hydrolysis; 3, organic biomass obtained by the thermal hydrolysis is subjected to flash evaporation in a flash evaporation tank; and 4, a digestive juice and the organic biomass subjected to flash evaporation are mixed and cooled and the cooled mixture is further cooled by a heat exchanger, wherein the organic biomass subjected to flash evaporation is digested by the digestive juice and produces biogas and slag. The device and the methodprovided by the invention have the characteristics of high heat exchange efficiency, short thermal-hydrolysis period and low energy consumption, and can be widely utilized for the field of organic biomass treatment.

Description

technical field [0001] The invention relates to thermal hydrolysis technology, in particular to a device and method for realizing thermal hydrolysis fermentation treatment by means of rotation. Background technique [0002] At present, the dry weight of sludge discharged by my country's sewage treatment plants is about 1.4 million tons per year, and it is increasing at a rate of more than 10% every year; moreover, the sludge contains a large amount of harmful substances such as heavy metals and pathogenic bacteria, which is harmful to the environment; It can be seen that the problem of environmental pollution caused by sludge is becoming more and more prominent, which has caused great safety hazards, environmental hazards and economic burdens to the society. The thermal hydrolysis digestion treatment process is a treatment technology for sludge reduction, resource utilization, stabilization and safety. The thermal hydrolysis reactor is the core and key equipment of the sludg...

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Problems solved by technology

[0003] It can be seen that in the prior art, the thermal hydrolysis fermentation treatment technology has problems such as low heat exchange efficiency per unit time or unit energy consumption, long thermal hydrolysis cycle, and relatively large energy consumption.

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