Biomass modification system for sludge dewatering and working method thereof

Abstract

The invention relates to a biomass modification system for sludge dewatering. The system includes a rack, the rack is equipped with a crushing mechanism, a sieving mechanism and a modification mechanism from top to bottom in order, and a blending mechanism located on one side of the rack is disposed below the modification mechanism. A bottom discharge port of the crushing mechanism is connected toa top feed inlet of the sieving mechanism, a coarse material discharge port at the bottom of the sieving mechanism is connected to a top feed inlet of the modification mechanism, a lateral fine material discharge port of the sieving mechanism is connected to a collection bin, and a bottom discharge port of the modification mechanism is connected to a top feed inlet of the blending mechanism. Thesystem and method provided by the invention can achieve uniform mixing of modified biomass and sludge, can reduce the sludge treatment cost, the process is simple, can improve the sludge dewatering performance and the calorific value of the sludge cake, and can reasonably and effectively utilize biomass resources.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a biomass modification system for sludge dewatering and a working method thereof. Background technique [0002] At present, the treatment method often used in sewage treatment plants is to use plate and frame filter press, centrifugal dehydrator or belt filter press to carry out shallow treatment of sludge by physical methods such as extrusion or centrifugation. The sludge treated by the above process Basically unable to meet my country's increasingly stringent sludge treatment and disposal standards. [0003] As an efficient sludge dewatering technology, electroosmosis technology has been applied to sludge dewatering treatment in a small range. However, the traditional electro-osmosis technology also has shortcomings that limit its application. For example, when only electro-osmosis technology is used for dehydration, it is easy to cause anode drying, the sludge dehydra...

AI Technical Summary

Problems solved by technology

However, the traditional electro-osmosis technology also has shortcomings that limit its application. For example, when only electro-osmosis technology is used for dehydration, it is easy to cause anode drying, the sludge dehydration efficiency decreases, and the moisture content of the mud cake after dehydration still cannot meet the requirements; It is usually necessary to add sludge dewatering agents. At present, the most commonly used sludge dewatering agent is cationic polyacrylamide (CPAM). It is obvious that it is difficult to degrade under natural conditions, causing secondary pollution to the environment, and a large amount of organic solvents such as surfactants used in the synthesis of CPAM will also pollute the environment and increase the cost of sludge treatment

[0004] The dehydrated sludge cake has a low calorific value and cannot be directly burned as fuel. Most of the existing technologies are to mix the sludge cake with coal or other combustion aids before burning, and the process is complicated.

[0005] According to the statistics of my country's "Long-Term Development Plan for Renewable Energy", my country is rich in biomass resources, but lacks reasonable and effective ways to use them, which not only causes waste of resources, but also easily pollutes the environment.

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