Harmless and resourceful treatment system and process for activated sludge

Abstract

The invention discloses a harmless and resourceful treatment system and process for activated sludge. The process includes the five treatment stages of raw material pretreatment stage, electrolysis pretreatment stage, cracking and centrifugal separation stage, waste heat recovery and tail gas treatment stage and tail gas automatic control stage. The system integrates electrolysis, gasification, jet grinding, ionization and centrifugal separation, and realizes harmlessness through electric energy-chemical energy-heat energy-kinetic energy decomposition and separation. The system has the characteristics of simple equipment and convenient operation; the electrolysis equipment achieves automatic cleaning and unloading, low labor consumption, and high automation degree.

Description

technical field [0001] The invention relates to a sludge treatment process, in particular to an activated sludge harmless and resourceful treatment system and a process thereof. Background technique [0002] The disposal of excess sludge in sewage treatment plants has always been an environmental protection problem that plagues the stable operation of various sewage treatment plants. Normally, after the activated sludge has passed the identification of harmful substances, physical landfill is the first choice. However, with the development of urbanization, many cities use The operation of waste plants for sludge landfills is generally tense, and the requirements for future landfills will become higher and higher, which is not conducive to landfill operations; high-temperature combined incineration requires collaborative units, and the cost of harmless treatment is high, and it is difficult to promote; low-temperature drying The new technology is based on the traditional heat...

AI Technical Summary

Problems solved by technology

There are two problems. One is that industrial sewage and domestic sewage in some cities are not separated, and there is a risk of hazardous waste exceeding the standard; With the improvement of sludge post-treatment standards, the requirements for dehydration rate and other indicators are becoming more and more stringent, and the cost of dehydration is getting higher and higher.

[0005] The second is the harmless treatment method, which is mainly combined incineration treatment, but the treatment cost is high due to unstable and low calorific value and tail gas treatment problems, and is restricted by the receiving unit, so it is not easy to promote; some electrolysis, plasma incineration, Microwave disposal, etc., have problems such as high energy consumption, thermal efficiency bottlenecks, and incomplete processes that are not easy to promote; there is also a part of lime dehydration and drying, which leads to sludge increment, limited raw materials, and high cost; heat treatment methods generally suffer from sensible heat loss serious

[0006] The third method is low-temperature fermentation, drying, and resource utilization. The equipment is bulky, the energy consumption of the process is scattered, the energy consumption is large, and there is a bottleneck in thermal efficiency. The accumulation of inorganic salts requires solidification and isolation; this type of process is common, with a large footprint, large deodorization capacity, low thermal efficiency, and large latent and sensible heat losses

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