Method for drying sludge by utilizing residual heat of tunnel kiln

A technology of drying sludge and tunnel kiln, which is applied in the direction of dehydration/drying/concentrated sludge treatment, which can solve the problems of difficulty in increasing the amount of sludge and sludge drying, and achieve high automation and low energy consumption , the effect of improving efficiency
CN109052902AActive Publication Date: 2018-12-21XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD
Publication Date
2018-12-21

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Abstract

The invention discloses a method for drying sludge by using residual heat of a tunnel kiln. The method comprises the following steps: sending the sludge to a sludge steam wall breaking system, the filled steam pressure being larger than or equal to 0.4 MPa, and completing the wall breaking after holding pressure for 20 hours; sending to a flocculation tank after breaking the wall, after adding aninorganic flocculant to be mechanically stirred, standing and then completing flocculation; sending to a settling pond to settle, removing an upper liquid to obtain the settled sludge, sending the settled sludge to a closed storage tank to perform anaerobic deodorization to obtain odorless settled sludge; 5, mechanically dehydrating the odorless settled sludge, and finally drying by a tunnel kilnresidual heat drying system to obtain dried sludge. The method disclosed by the invention can utilize the residual heat of the tunnel kiln for drying the sludge, and innovately associate the sludge treatment enterprise with the sintered building material enterprise into a complete sludge elimination industrial chain, and the dried sludge can provide the sintered wall body material production linewith qualified raw materials.
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Description

technical field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for drying sludge by utilizing waste heat of a tunnel kiln. Background technique

[0002] At present, a large amount of sludge is produced in the process of sludge treatment in my country, and the annual output of sludge (water content 80wt%) is expected to be as high as 50 million tons. The sludge problem has become a bottleneck in the field of sludge treatment. Compared with foreign developed countries, the sludge composition in our country is greatly different due to regional differences. In some areas, the content of sediment and heavy metals is relatively high, and the content of organic matter is low, resulting in low gas production rate of sludge anaerobic fermentation, low calorific value of incineration treatment, The environmental risk of land use is high.

[0003] It is of great significance to develop sludge treatment, disposal and reso...

Claims

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