Belt type sludge dryer

Abstract

The invention discloses a belt type sludge dryer comprising a tank body, wherein an air inlet is formed in the bottom of the tank body, an air outlet is formed in the top of the tank body, a plurality of conveying belts which are distributed in parallel from top to bottom are arranged in the tank body, the conveying directions of adjacent conveying belts are opposite, the position of the discharge end of the upper-side conveying belt corresponds to the position of the feed end of the lower-side conveying belt, a discharge opening which corresponds to the discharge end of the lowermost-layer conveying belt is formed in the bottom of the tank body, a feeding channel is formed in the feed end of the uppermost-layer conveying belt, an inclined baffle plate is arranged between the feed end of each conveying belt and the inner wall of the tank body, one side of the baffle plate close to the inner wall of the tank body is higher than the side close to the feed end of each conveying belt, and air flow channels of which the flowing directions are opposite to the conveying directions of the conveying belts are formed in the tank body. The belt type sludge dryer disclosed by the invention can be used for drying sludge by using hot flue gas generated by burning the sludge, and can be used for improving the drying efficiency and also reducing the treatment cost.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a belt sludge dryer. Background technique [0002] At present, after preliminary centrifugal treatment, the water content of the sludge is about 80%. The water content of the sludge is too high to be directly incinerated. It needs to be dehydrated and dried to reduce the water content before it can be incinerated. The process of sludge drying is generally completed by high temperature heating or natural drying. For the method of natural drying, such as the Chinese patent authorization announcement number: CN202529971U, the date of the authorization announcement was November 14, 2012, which discloses a drying bed for natural drying and digested sludge, including a drying chamber, a There is a waterproof geomembrane on the bottom plate of the chemical chamber, and a filter layer is set on the waterproof geomembrane. The thickness of the filter layer is 650~750mm, and the gravel fil...

AI Technical Summary

Problems solved by technology

Using this drying bed to dry the sludge naturally, the sludge drying efficiency is low, and the drying degree of the surface layer and the inside of the sludge is inconsistent, and the drying effect is poor

Of course, at present, sludge is also dried by high-temperature heating, which will inevitably consume a lot of energy, which is not conducive to energy conservation and environmental protection, and at the same time leads to higher sludge treatment costs.

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