A continuous tower reactor for thermal hydrolysis treatment of sludge

Abstract

The invention belongs to the field of reduction treatment of sludge, and particularly relates to a continuous tower reactor for the pyrohydrolysis treatment of sludge, which can run continuously and is good in stability and high in efficiency. The continuous tower reactor disclosed by the invention comprises a barrel and a stirring shaft, wherein the top of the barrel is provided with a top cover, the bottom of the barrel is provided with a head, the stirring shaft is arranged on an axis of the barrel, the stirring shaft is driven by a stirring motor on the top cover, the stirring shaft, from bottom to top, is sequentially provided with an anchor agitator, a screw agitator and at least a paddle agitator, the anchor agitator is attached to the head, and the outer side of the paddle agitator is provided with a scraper. The lower end of the barrel is connected with a sludge inlet and an obliquely upward steam pipe, and the upper end of the barrel is connected with a sludge outlet pipe, so that sludge is axially conveyed through the screw agitator and flows out from the top of the reactor, and the paddle agitator has no axial force, thereby ensuring the reaction time of a pyrohydrolysis reaction of the sludge, avoiding the incessant on-off of system material pumps and valves caused by an existing device, and realizing the continuous operation of a pyrohydrolysis process.

Description

technical field [0001] The invention belongs to the field of sludge reduction treatment, in particular to a continuous tower reactor for thermal hydrolysis treatment of sludge. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of urbanization level, the amount of sewage treatment is increasing rapidly, and the amount of sludge generated is also increasing rapidly. It is imminent to reduce, harmless and resource-based disposal of sludge . And various sludge disposal methods (such as sanitary landfill, land use, incineration, use as building materials, etc.) all have certain requirements on the moisture content of sludge. [0003] The water in the sludge has four states of interstitial water, capillary water, adsorbed water and bound water. Mechanical dehydration can only remove part of the interstitial water and a small amount of capillary water in the sludge. After dehydration, the moisture content of the sludge i...

AI Technical Summary

Problems solved by technology

[0005] The thermal hydrolysis reaction of sludge takes a long time, about 30 to 60 minutes. Therefore, most of the current thermal hydrolysis processes are intermittent, that is, a certain amount of sludge is added to the reaction tank, and heating is maintained to maintain sufficient reaction time. After a period of time, the sludge is discharged, and new sludge is added to continue the reaction. The material pipeline is cut off within the reaction time of 30 to 60 minutes. During the operation of the whole system, the material pump and pipeline valve are continuously opened and closed. Complicated, poor stability, low efficiency, high cost

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