A kind of thermal hydrolysis method of sludge

Abstract

The invention discloses a thermal hydrolysis method of sludge, which comprises the following steps: the step of quickly and fully mixing the sludge to be treated with steam, passing the sludge to be treated with a certain pressure into the first inlet of the steam sludge injector, At the same time, steam with a certain pressure and temperature is passed into the second inlet of the sludge injector, and the sludge to be treated and steam are quickly and fully mixed in the sludge injector and then enter the sludge thermal hydrolysis pipeline; The step of thermal hydrolysis in the sludge thermal hydrolysis pipeline is to control the thermal hydrolysis temperature in the sludge thermal hydrolysis pipeline at 110-225°C, control the pressure at 0.5-3Mpa, and the reaction time is 0.1-1 hour. The sludge flows out through the pressure release device at the sludge outlet. The thermal hydrolysis method of sludge of the present invention can rapidly realize sufficient mixing of steam and sludge, has high heat transfer efficiency, and is energy-saving and environment-friendly.

Description

A kind of thermal hydrolysis method of sludge technical field The present invention relates to a kind of thermal hydrolysis method of sludge. Background technique The thermal hydrolysis of sludge refers to: under certain temperature and pressure conditions, the sludge is heated in a closed container, The sludge flocs are disintegrated, the cells are broken, organic matter is released, and macromolecules are hydrolyzed. Settling performance, dehydration performance and biodegradation performance can effectively improve the efficiency and quality of subsequent anaerobic digestion. Existing sludge thermal hydrolysis method mainly contains following two kinds: 1, sludge will be passed into tank body first, then steam will be passed into tank body, use mixer to stir sludge simultaneously, make sludge and The steam is mixed, and the steam heats the sludge and makes the tank have a certain pressure, so that the sludge undergoes a thermal hydrolysis reaction in the tank. ...

AI Technical Summary

Problems solved by technology

In this method, since the inner diameter of the sludge conveying pipeline 3 is much smaller than the diameter of the tank body, an agitator cannot be installed inside the sludge conveying pipeline 3, so that the sludge is heated unevenly in the sludge conveying pipeline 3, and the sludge Sludge is prone to sluggishness in the sludge conveying pipeline 3, and the inner wall is prone to fouling, which further reduces the heat transfer efficiency

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