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Sludge dewatering drying method

A sludge dewatering and sludge technology, applied in the field of environmental engineering, can solve the problems of expensive equipment, low dewatering effect, and large dependence, and achieve the effects of reducing transportation and treatment costs, obvious deodorizing effect, and reducing volume.

Inactive Publication Date: 2013-03-20
慈溪市沿途户外用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfill, incineration, fermenting, etc., all of these methods have disadvantages such as low dehydration effect, expensive equipment and high operating costs.
[0005] In many years of experience in sludge treatment, the cost of natural drying method is the cheapest, but it is highly dependent on the site and climate, and the treatment time is long. For the sludge treatment of some small factories, this is the most suitable s Choice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The present invention dehydrates and dries the sludge after sewage treatment, comprising the following steps:

[0019] (1) add coal ash and quicklime in sludge, stir; The add-on of coal ash is 10% of sludge weight, and the add-on of quicklime is 5% of sludge weight;

[0020] (2) Heating the above materials, controlling the temperature of the sludge at 80° C., and stirring at the same time, the stirring time is 30 minutes;

[0021] (3) add ferric chloride and potassium permanganate in above-mentioned material and carry out tempering, calculate by mass percentage, the add-on of ferric chloride is 0.1% of sludge weight, the add-on of potassium permanganate is sludge weight 1%;

[0022] (4) Heating the above-mentioned materials again, controlling the temperature of the sludge at 50° C., and stirring at the same time, the stirring time is 10 minutes.

[0023] By detecting the amount of dehydration, it is known that the amount of dewatered water accounts for 85.5% of the to...

Embodiment 2

[0025] The content of the present invention is to dehydrate and dry the sludge after sewage treatment, comprising the following steps:

[0026] (1) add coal ash and quicklime in the sludge, stir; the add-on of coal ash is 5-10% of sludge weight, and the add-on of quicklime is 5-10% of sludge weight;

[0027] (2) Pass the above materials into hot air, the pressure is 0.2-0.4MPa, control the temperature of the sludge at 50°C, and stir at the same time, the stirring time is 10 minutes;

[0028] (3) add ferric chloride and potassium permanganate in above-mentioned material and carry out tempering, calculate by mass percentage, the add-on of ferric chloride is 1% of sludge weight, the add-on of potassium permanganate is sludge weight 0.05% of;

[0029] (4) Pass hot air to the above-mentioned materials again, the pressure is 0.2-0.4 MPa, control the temperature of the sludge at 80° C., and stir at the same time, and the stirring time is 20 minutes.

[0030] By detecting the amount...

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PUM

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Abstract

The invention belongs to the environment engineering field, and specifically relates to a method for dewatering drying sludge after sewage treatment. The method comprises the following steps of adding coal ash and quick lime in the sludge; stirring; heating the above materials or introducing heat wind to the above materials; controlling the temperature of the sludge to be 50-80 DEG C; and at the same time, stirring for 10-30 minutes; adding ferric chloride and potassium permanganate to the above materials for hardening and tempering, wherein the additional amount of ferric chloride is 0.1-1% by mass of the weight of the sludge, and the additional amount of potassium permanganate is 0.05-1% by mass of the weight of the sludge; heating the above materials or introducing the heat wind to the above materials; controlling the temperature of the sludge to be 50-80 DEG C; and at the same time, stirring for 10-20 minutes. The method is low in cost and simple in process.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a method for dehydrating and drying sludge after sewage treatment. Background technique [0002] Sewage treatment (wastewater treatment) is the process of purifying sewage to meet the water quality requirements of a certain water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. [0003] At present, due to the pressure of cost, most of the sewage treatment in our country adopts the activated sludge method and various biochemical sewage treatment methods derived from it. These methods all involve sludge containing a large amount of flocculant for sewage treatment. The collection and treatment of sludge has become a huge burde...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 王惠苗
Owner 慈溪市沿途户外用品有限公司
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