Anti-blocking continuous pyrohydrolysis system for sludge

Abstract

The invention discloses an anti-blocking continuous pyrohydrolysis system for sludge. Through coupling of a partial oxidation technology and intermediate medium backheating and the continuous pyrohydrolysis system, the problem that sludge in an anaerobic environment is subjected to high temperature carbonization and agglomeration is effectively solved, it is ensured that only clean fluid flows along the side of a heat exchanger shell to avoid frequent changing of the sludge conveying direction, a grinding pump breaks and grinds fed sludge to avoid aggregation and hardening of sludge particles,and the problem of system blockage is effectively avoided; heat of the system is utilized in a multi-gradient mode, a biogas production technology adopting anaerobic biochemistry is adopted, and liquid after pressing filtering is subjected to resource utilization; partial liquid after pressing filtering flows to the front sections of the technology to conduct viscosity reduction on sludge, usingof fresh softened waste is avoided, the thermal recycling efficiency of the system is improved, and resource consumption of the system is reduced; the economical performance of the system is effectively improved, the running stability of the continuous pyrohydrolysis system for sludge is enhanced, and promotion of large-scale application of the technology is facilitated.

Description

technical field [0001] The invention relates to a sludge continuous thermal hydrolysis device, in particular to an anti-clogging sludge continuous thermal hydrolysis system. Background technique [0002] With the continuous construction of sewage treatment plants, my country's municipal sludge has also maintained a relatively high growth rate, and it is estimated that by 2020, the production volume will reach more than 60 million tons. In 2010, less than 10% of the sludge in my country was disposed of in sanitary landfill, land utilization, incineration or building material utilization, and most of the rest were not treated in a standardized manner. In the past five years, the sludge treatment and disposal rate has not exceeded 20%. Sludge contains toxic and harmful substances such as pathogens, heavy metals and persistent organic matter. Without effective treatment and disposal, it is very easy to cause secondary pollution to groundwater and soil, which brings serious safe...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the clogging problem caused by carbon deposition and coking in the sludge thermal hydrolysis system, and provide an anti-clogging sludge low-cost continuous thermal hydrolysis system, which is a kind of anti-clogging coking and economical improvement The system solution can be widely used in high-efficiency, low-cost and harmless treatment of urban and industrial sludge

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