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Domestic sludge drying treatment method

A domestic sludge and formula technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of poor effect, high cost, low processing capacity, etc., and achieve the effect of simple operation, sufficient source, and low price

Inactive Publication Date: 2013-03-13
徐渊
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low processing capacity, high cost and poor effect in the existing domestic sludge dehydration and drying treatment, and to provide a kind of scientific additive material matching, easy to take materials, good dehydration and drying effect, comprehensive A low-cost domestic sludge drying method

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Embodiment Construction

[0019] The technical solutions of the present invention will be further specifically described below through examples.

[0020] In this embodiment, a method for drying domestic sludge is to put 40Kg of domestic sludge with a water content of 75% into the stirring tank, add 400Kg of water, add a mesh number of 30 mesh, a water content of 48%, and a calorific value of 1778Cal / 6Kg sawdust powder of g, add 0.2Kg ferrous sulfate, 1.5Kg slaked lime powder and 0.3Kg bleaching powder, stir well. The prepared polyacrylamide is cationic polyacrylamide with an ionization degree of 35 and a molecular weight of 8 million. The polyacrylamide solution is 3 kg and the concentration is 0.26%, that is, the polyacrylamide is 7.8 g.

[0021] After sampling, the solid content of the sludge was measured to be 9.7%, and then the sludge and the prepared polyacrylamide solution were pumped into the filter press with a pneumatic diaphragm pump. The filter plates of the filter press were all made of 80...

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Abstract

The invention relates to the technical field of sludge treatment, particularly relates to a domestic sludge drying treatment method, and solves the problems of low treatment capacity, high cost and poor effect in the existing domestic sludge dewatering and drying treatment. The method is characterized by comprising the following steps: adding an additive in the drying treatment, wherein the formula of the additive comprises the following components in percentage by mass of domestic sludge: 3-5% of slaked lime, 15-25% of sawdust, 0.5-1% of bleaching powder and 0.3-0.7% of ferrous sulfate, and the components are evenly mixed; standing the additive prepared according to the formula for more than half an hour; transferring the additive together with 2-3 ppm of polyacrylamide (by mass of the absolute dry sludge) into a press filter through a pneumatic diaphragm pump; and then, adding the domestic sludge, performing water squeezing treatment, and drying to form sludge cakes. According to the invention, the additive is wide in source and low in price; the method is simple to operate; the water content of the dried sludge is about 50%; and the dewatering effect is remarkable.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for drying domestic sludge. Background technique [0002] The discharge of domestic sewage has exceeded the discharge of industrial sewage, and sludge is the final subsidiary product of sewage treatment. Whether sludge can be properly disposed of is related to the success of the entire sewage treatment system. At present, the main disposal methods of sludge are: sanitary landfill, composting, incineration, but sanitary landfill has secondary pollution, incineration is a better method, not only to maximize the reduction of sludge, but also to reuse resources , used for heating and power generation, sludge incineration ash can be used to make bricks, etc., balance the cost of sludge treatment, and realize the harmlessness, reduction and resource utilization of sludge. [0003] The moisture content of sludge is a key issue restricting sludge disposal and utilizati...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 徐渊
Owner 徐渊
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