Hollow paddle type sludge drying technique

Abstract

The invention discloses a hollow paddle type sludge drying technique, which comprises the following flows: (1) drying wet sludge, namely conveying the wet sludge to a paddle dryer for drying through a sludge pump, discharging the dried sludge from a bottom of the paddle dryer, and after temporarily storing the dried sludge in a dry sludge surge bunker, conveying the dried sludge into an incinerator for incineration; (2) drying carrier gas, namely making wet gas generated by drying contacted with a large amount of injected washing cooling water and cooling quickly, condensing steam in the wet carrier gas and meanwhile removing dust particles, removing a large amount of steam and the carrier gas in the dust particles, allowing part of steam and carrier gas to enter the incinerator, and allowing the rest part of steam and carrier gas to enter the paddle dryer for recycling; and (3) washing, namely after washing most of the dust particles and the steam in the wet carrier gas, ensuring that washing water flows from the bottom of a washing tower and enters a sedimentation basin, settling the dust particles to enter a cooling tower, and allowing the cooled washing water to enter the washing tower again for recycling.

Description

technical field [0001] The invention relates to a sludge drying technology, in particular to a hollow paddle type sludge drying technology. Background technique [0002] With the development of society and the progress of mankind, people's awareness of the protection and improvement of living environment has been continuously strengthened, and the country's implementation of environmental protection policies has been continuously strengthened, so that the sewage treatment rate has continued to increase nationwide, and various cities have built sewage treatment plants. There are hundreds of large, medium and small sewage treatment plants, and they are still increasing rapidly. Every sewage treatment plant is faced with the problem of how to dispose of a large amount of surplus sludge generated every day. At present, there is no proper final disposal method in our country. Therefore, in recent years, the dewatered sludge of sewage treatment plants has been randomly piled up w...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a hollow paddle type sludge drying technology, which introduces part (or all) of the carrier gas and non-condensable gas into the incinerator for incineration, and recycles the remaining part, which solves the problem of drying gas and carrier gas. Such as harmful gases brought by gas emissions, precipitation and cooling treatment are carried out on the washing water, so that the washing water can be recycled, which solves the problem of thermal pollution in the washing wastewater discharge, and reduces the washing cost at the same time

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