Municipal sludge coupling granulation system and use method thereof

Abstract

The invention relates to the technical field of sludge treatment, in particular to a municipal sludge coupling granulation system and a use method thereof. The system comprises a screening assembly, a transfer assembly, a drying assembly and a granulation assembly which are sequentially arranged, and the screening assembly comprises a vibrating screen, a cover plate arranged at an opening in the top end of the vibrating screen, a screen plate arranged in the vibrating screen and damping assemblies arranged on supporting legs at the bottom of the vibrating screen; a feeding port is formed in the plate face, close to the input end of the vibrating screen, of the cover plate, the output end of the vibrating screen is provided with an upper discharging pipe located at the upper end of the screen plate and a lower discharging pipe located at the lower end of the screen plate, and the damping coefficient of the damping assembly is adjustable. The drying assembly includes electro-osmosis drying components and low-temperature drying components arranged in sequence, and the granulation assembly comprises a stirring bin, a preheating bin, a roasting bin, a cooling bin and a cyclone separator which are arranged in sequence; and the problems of poor environmental protection property, poor granulation effect, high maintenance cost and the like in the prior art can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a municipal sludge coupling granulation system and a use method thereof. Background technique [0002] Sewage plant sludge has a moisture content as high as 70% to 80% after mechanical dehydration. It is usually necessary to granulate and dry the sludge before incineration. The traditional sludge treatment method is first drying and then hard granulation, that is, first use drying equipment to reduce the water content of the sludge, and then proceed to the next step of granulation. At present, the more common drying equipment is the rotary cylinder hot air dryer. The drying process is that the wet sludge is directly added from the higher end, and the heat carrier enters the cylinder from the lower end. With the rotation of the cylinder, the sludge is subjected to gravity. The action travels to the lower end, and absorbs the heat of the heat carrier and gradually becomes...

AI Technical Summary

Problems solved by technology

[0005] First, the environmental protection is not good, because the sludge is usually rich in various harmful substances. If the sludge is not effectively disinfected before granulation, the finished sludge granules produced will release these substances to the outside world during actual use. Harmful substances, thereby polluting the environment and even endangering human health

[0006] Second, the granulation effect is not good, because the device in the above reference document has a low drying efficiency when drying the sludge and the water content in the dried sludge is still high

[0007] Third, the maintenance cost is high, because the wet sludge will adhere to the inner wall surface of the device, or even dry out on the inner wall surface of the device, so the user needs to clean the inner wall surface of the device regularly

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