Carbon-based sludge composite regulating and dehydrating agent based on sludge incineration

Abstract

The present invention discloses a carbon-based sludge composite regulating and dehydrating agent based on sludge incineration. The carbon-based sludge composite regulating and dehydrating agent comprises a carbon-based framework construct and a small amount of an assistant agent, wherein the addition amount of the carbon-based framework construct is 1-5% of the weight of the sludge, the addition amount of the assistant agent is 0.03-1.0% of the weight of the sludge, and the carbon-based framework construct is a material selected from wood chips, biological straws, brown coal and coal gangue, or a mixture comprising any materials selected from wood chips, biological straws, brown coal and coal gangue. According to the present invention, with the used carbon-based framework construct and the assistant agent, the electrostatic repulsion effect and the hydration effect between the sludge particles can be reduced; the porous granular structure of the carbon-based sludge composite regulating and dehydrating agent can absorb the partial sludge to form the penetrative and solid lattice structure, such that the permeability of the filter cake during the mechanical dehydration process is ensured, and the dehydration speed during the filtering stage and the compressing stage is improved; with the formed homogeneous framework, the water content of the compressed mud cake is uniform, and the compressed mud cake has good homogeneity; the carbon-based sludge composite regulating and dehydrating agent of the present invention has characteristics of less addition amount, good sludge filtering performance, high dehydration efficiency, high solid content of the mud cake, and the like; the components of the carbon-based sludge composite regulating and dehydrating agent comprise the carbon-based material, such that the heat value of the mud cake is improved so as to easily perform the follow-up cake incineration treatment.

Description

technical field [0001] The invention relates to sludge treatment technology, in particular to a carbon-based sludge composite conditioning and dehydrating agent based on sludge incineration, which is applied in deep dewatering by a carbon-based skeleton construct-based sludge conditioning and dehydrating agent. Background technique [0002] Sludge is an inevitable product of urban domestic sewage treatment, and its production volume is increasing. The treatment and disposal of sludge has become a bottleneck problem that needs to be solved urgently. Dehydration is a process that must be experienced in any treatment and disposal method. Chemical conditioning methods are usually used, and dehydration flocculants are added to cause chemical reactions on the surface of sludge colloidal particles, neutralize the charge carried by sludge colloidal particles, and promote sludge particles Agglomerates into larger particle flocs, and at the same time separates water from sludge partic...

AI Technical Summary

Problems solved by technology

When the amount of lime powder added is small, the treatment effect is poor or the cost is high; when the amount of lime powder added is high, although the dehydration effect is improved, the sludge after conditioning is in a state of high alkali, and a large amount of Organic matter must be lost, which is not conducive to resource utilization

CN 101182095 discloses a high-efficiency composite filter aid for sludge dewatering, its raw material components are as many as nine kinds, and the preparation process is complicated

In the dehydrating agent disclosed in CN 101100345A, the highest dosage of surfactant reaches 5% of the pretreated water-containing sludge, and a large amount of surfactant will inevitably remain in the water, causing secondary pollution