Method and device for carrying out drying treatment on sludge

Abstract

The invention discloses a method and a device for carrying out drying treatment on sludge, and belongs to the field of solid waste treatment. The device comprises a heat source and a sludge drying treatment machine, wherein the sludge drying treatment machine comprises a roller press, a toothed blade forming machine and a stirring type drying machine in sequence from top to bottom. The method comprises the following steps: transporting sludge which is subjected to simple drying and precipitation treatment to the roller press through a feeding machine, and rolling the sludge into thin sludge cake; cutting the thin sludge cake into strips by the toothed blade forming machine; enabling sludge particles to enter the stirring type drying machine, and heating and overturning for many times, thusreducing the moisture content of the sludge particles to a designated range; transporting the sludge to a designated place through a discharging machine, and completing drying treatment of the sludge. According to the device and the method, disclosed by the invention, by adopting the modes of rolling the sludge into particles and gradually carrying out the drying treatment, the energy utilizationrate and a drying effect are better.

Description

Technical field [0001] The invention belongs to the field of solid waste treatment, and specifically relates to a sludge drying treatment method and device. Background technique [0002] With the development of my country's social economy and urbanization, the production and quantity of urban sewage is constantly increasing. According to relevant forecasts, the volume of urban sewage in my country will continue to increase significantly in the next 20 years. At present, my country's annual output of dry sludge is nearly 3×106t. With the development of domestic sewage treatment industry, the total treated water volume and treatment level of sewage treatment plants continue to expand and improve, and the amount of sludge produced will also increase. A large amount of sludge has not been treated in a timely and reasonable manner and has become a heavy burden on the sewage treatment plant. The sludge also contains a large amount of N, P, K, Ca and organic matter, and N and P are ma...

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Problems solved by technology

[0006] However, in the process of processing sludge to press sludge, because sludge with high water content and viscosity is easy to bond, this device can only treat sludge with low water content and low viscosity, and the scope of application is obvious. On the other hand, because the viscosity of the sludge is not enough to keep it in a strip shape, it is easy to break and accumulate during the turning process, which makes the drying efficiency of the device lower, which is not conducive to saving energy. way, maintain the molding effect of sludge particles, and increase the cost of drying, which is also not conducive to green treatment

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