Sludge splitting and gasifying method

Abstract

The invention discloses a sludge splitting and gasifying method. The sludge is treated through a sludge splitting and gasifying device. The device comprises a shell, a sludge feed inlet formed in the top part of the shell, and a drying chamber, a pyrolysis chamber, an oxidizing chamber and an ash residue chamber downwards and sequentially arranged from the sludge feed inlet in the shell, wherein a pyrolysis gas eduction tube is arranged on the upper part of the drying chamber; a furnace bar is arranged between the oxidizing chamber and the ash residue chamber, and is made of refractory matters; a plurality of oblique cylinder shaped holes are formed in the furnace bar; a slag discharge hole and a gasifying medium introduction pipe are arranged on the side wall of the ash residue chamber; the shell is in an upright barrel shape; an inlet valve is arranged on the sludge feed inlet; the sludge feed inlet is in a funnel shape; the sludge feed inlet and the inlet valve are closely identical to form seal. The sludge splitting and gasifying method provided by the invention is used for treating the sludge, has the characteristics that the gasifying efficiency is high, the pollutant generation is avoided on the source, and can realize reduction, stabilization, harmlessness and resource recovery of the sludge without additionally adding energy.

Description

technical field [0001] The invention relates to a sludge treatment method in environmental protection technology, in particular to a sludge cracking and gasification method. Background technique [0002] With the rapid development of urban sewage treatment in my country, the number of sewage treatment plants is increasing, and the amount of sludge generated is also increasing. According to statistics, at present, the annual sludge production of urban sewage treatment plants in my country has reached 30 million tons (water content 80%), and will reach about 50 million tons by the end of the "Twelfth Five-Year Plan". [0003] Sludge incineration treatment and disposal is an important means to achieve sludge reduction, stabilization and harmlessness. However, the direct incineration of sludge has the problems of low combustion efficiency and single energy utilization mode; in addition, the flue gas of sludge incineration contains PM2.5, NO x , SO 2 And dioxin and other pollu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for sludge treatment to solve the problems of low sludge resource utilization and difficult secondary pollution control of flue gas existing in the existing sludge incineration technology, and to achieve sludge reduction globalization, stabilization, harmlessness and resource utilization

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