Sludge deep dehydration method comprising wall breaking-penetrating-press filtrating process

Abstract

The invention relates to a sludge deep dehydration method comprising a wall breaking-penetrating-press filtrating process. The method comprises steps of: 1, a wall breaking step, wherein an organic wall breaking agent is added to sludge with a water content of 90-97%, and the mixture is mixed and stirred for no less than 5min; 2, a penetrating step, wherein a powdery penetrating agent is added tothe wall-broken sludge, and the mixture is mixed and stirred for no less than 10min; 3, a press filtrating step, wherein the wall-broken and penetrated sludge is delivered to a plate-and-frame filterpress by using a pump, and the water content of the sludge obtained after press filtration is 45-50%. The method is advantaged in that: the organic agent triethanolamine is adopted, the dosage of triethanolamine is extremely low, and triethanolamine can be completely burnt in a burning treatment, such that a compatibilization problem is avoided, and the heat value of the sludge is not influenced;a small amount of substances such as fly ash and coal powder is added to the penetrating system, such that penetration channels are formed, and water content in the sludge can flow freely; a common plate-and-frame filter press is adopted in the press filtrating process, the sludge regulated by using the wall breaking agent and the powder is press-filtrated in the plate-and-frame filter press, such that the water content in the sludge is reduced to below 50%.

Description

technical field [0001] The invention relates to a method for deep dehydration of sludge by using special medicament and process, which can realize the reduction of sludge and provide conditions for subsequent disposal, and reduce the odor and transportation generated during the treatment and disposal of sludge. , Excessive moisture content and other issues. The moisture content of the sludge treated by the method is reduced to below 50%, and the treated sludge not only reduces transportation costs, but also can realize safe landfill or incineration disposal. The invention belongs to the technical field of resource utilization for environmental protection. Background technique [0002] With the acceleration of urbanization and increasingly stringent environmental standards, the state and enterprises have increased investment in environmental governance, built a large number of new sewage treatment plants, and the amount of sludge produced has increased year by year. By the ...

AI Technical Summary

Problems solved by technology

The main reason for the difficulty in deep dewatering of sludge is that the biological cells and colloids in the sludge contain a large amount of "interstitial water" (about 70% of the total water content) which cannot be fully squeezed out by the pressure of traditional mechanical dehydration, and the water content of the sludge is at 60% % to 65%, it is viscous slurry, and the water molecules are wrapped by a layer of colloid. This area is called the "viscose phase area" of the sludge, which is the most difficult stage of sludge dewatering. According to the traditional mechanical dehydration method is difficult to further remove