Environment-friendly papermaking sludge treatment agent and preparation and application methods thereof

Abstract

The invention discloses an environment-friendly papermaking sludge treatment agent, which consists of a sludge cleaner, a sludge activator, and a sludge reinforcer, and the weight ratio of the sludge cleaner, the sludge activator, and the sludge reinforcer is 3 to 5:1 to 3:1. The sludge cleaner consists of the following materials: lime powder, modified diatomite, acrylamide, polyethylene glycol, concentrate pyrite powder and vinylidene fluoride. The sludge activator consists of the following materials: acetic acid, tetraethyl orthosilicate, urea, potassium sulphate and vitamin C. the sludge reinforcer consists of the following materials: cellulose, epoxy resin, acetic acid and modified starch. The invention also discloses a preparation method and an application method for the agent. The material resources are rich, the production cost is low, the preparation process is simple, equipment investment cost is reduced, and the invention is suitable for mass industrialized production; and the agent prepared by the invention does not affect the productivity of papermaking machines, and turns sludge into a papermaking material, thus greatly reducing the production costs of enterprises, preventing environmental pollution and saving resources.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to an environmental protection treatment agent for papermaking sludge. Background technique [0002] In the process of papermaking, a large number of fine fibers are lost and become sludge. The loss accounts for about 6-6.5% of the paper production. These fine fibers have a large surface area and are organic matter. They will be destroyed by anaerobic bacteria in the water for a long time. Pollution turns into sludge and forms solid waste, which wastes a lot of raw materials. More importantly, solid waste also seriously pollutes the environment. The existing papermaking sludge treatment methods include: first, remove 25-40% of the water in the solid waste through a filter press, and then transport it to landfill and incinerate. This method not only wastes raw materials but also pollutes groundwater and the atmosphere; second , to make solid waste into mud boards, about 30% of the sl...

AI Technical Summary

Problems solved by technology

[0002] In the process of papermaking, a large number of fine fibers are lost and become sludge. The loss accounts for about 6-6.5% of the paper production. These fine fibers have a large surface area and are organic matter. They will be destroyed by anaerobic bacteria in the water for a long time. Pollution turns into sludge and forms solid waste, which wastes a lot of raw materials. More importantly, solid waste also seriously pollutes the environment.

The existing papermaking sludge treatment methods include: first, remove 25-40% of the water in the solid waste through a filter press, and then transport it to landfill and incinerate. This method not only wastes raw materials but also pollutes groundwater and the atmosphere; second , to make solid waste into mud boards, about 30% of the sludge generated by the industry is used, and the added value is also very low. The gross profit margin is about 15%, and the profit is only about 2% after deducting processing costs. Due to the very small market demand for mud boards , the remaining 70% of solid waste is still landfilled and incinerated, which is also a waste of resources and pollutes the atmosphere; third, solid waste is processed into organic fertilizers for farmland. Since there are a large number of professional farmers of poultry and livestock in the countryside , and these fertilizers are higher in quality than organic fertilizers processed from solid waste, and lower in price than such fertilizers, so it is difficult to promote them, and the result is landfill and incineration; Acrylamide is used for retention, so that part of the solid waste remains in the paper, but 50% of the escape rate is in the system water during the addition process, which increases the water concentration of COD, SS, inorganic salts, and conductivity in the production system. High, resulting in decline in production output and quality, vicious cycle of escaped sludge in the water system, increasing the pressure on wastewater treatment, it is difficult for enterprises to meet the standards for treated water, and the remaining sludge is still press-filtered, landfilled and incinerated

These have brought inconvenience to manufacturers