Sludge treatment method and device

A kind of sludge treatment and sludge technology, which is applied in the field of sludge treatment to realize high efficiency and energy saving of sludge resource disposal, and can solve the problems of high purchase cost of equipment pipeline filter system, reduction of equipment investment and operation cost, large floor area, etc. problems, to achieve the effect of meeting the requirements of moisture content, reducing investment costs, and reducing shipping costs

Active Publication Date: 2015-01-21
南京扬子江生态环境产业研究院有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a sludge treatment method and device that realizes efficient and energy-saving sludge resource disposal, overcomes the shortcomings of the traditional process such as large sludge volume, high purchase cost of equipment and pipeline filter press system, and large floor area, and reduces the cost of equipment. Investment and operating costs

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  • Sludge treatment method and device
  • Sludge treatment method and device

Examples

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Effect test

Embodiment 1

[0033] An alcohol wastewater flow rate of 1000m 3 / d, the water content of the sludge in the sludge thickening tank is 98%, the pH is 7.5, and it is dehydrated by normal pressure filtration to a water content below 80%.

[0034] The sludge in the thickening tank with a water content of 98% is pretreated by coagulation and then enters the pre-dehydration device for concentration. The rotational speed of the pre-dehydration device is 0.3m / s. After dehydration, the water content of the sludge is 90.1%, and the volume becomes 1 of the original volume. / 5. After thickening, the sludge enters the sludge tank. After conditioning, the dehydration performance of the sludge is significantly improved, and the moisture content of the filter cake is reduced to 40% after dehydration. Due to the high organic content and high calorific value of alcoholic sludge, the calorific value of dry sludge is 14.7968MJ / kg, and the calorific value required for gasification with 40% low moisture content i...

Embodiment 2

[0036] A municipal sewage treatment plant has a flow rate of 100,000m 3 / d, the water content of the sludge in the sludge thickening tank is 97.8%, the pH is 7.0, and the water content is below 80% through normal pressure filtration and dehydration.

[0037] The sludge in the thickening tank with a water content of 97.5% is pretreated by coagulation and then enters the pre-dehydration device for concentration. The rotational speed of the pre-dehydration device is 0.35m / s. After dehydration, the water content of the sludge is 90.7%, and the volume becomes 23.56% of the original volume. %, after concentration, the sludge enters the sludge adjustment tank, and after conditioning, the moisture content of the filter cake drops to 43.2% after the sludge is dehydrated. The calorific value of dry-based sludge is 9.7968MJ / kg, and the calorific value required for gasification with a low moisture content of 43.2% is 1620kJ / kg, which cannot meet the energy balance of gasification. By mixi...

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Abstract

The invention discloses a sludge treatment method. The sludge treatment method comprises the steps of pre-dehydration treatment, sludge conditioning and dehydration with a dehydrator, wherein in the step of pre-dehydration treatment, deep thickening and dehydration are carried out on sludge in a sludge thickener through filtration with a microporous mesh sieve by utilizing a rotary sludge thickening and pre-dehydrating device and the moisture content of dehydrated sludge after thickening is controlled at 90-92%; in the step of sludge conditioning, the dehydrated sludge after thickening is conditioned by adding an additive; and the conditioned nontoxic sludge containing organic matters is used as the agricultural soil base fertilizer and the conditioned sludge containing metal elements or toxic sludge is subjected to deep dehydration and drying by the dehydrator and then is incinerated by adding auxiliary fuel. The sludge treatment method has the beneficial effects that the defects of large sludge volumes, high equipment pipeline filter-press system purchase costs, large floor areas and the like in traditional processes are overcome; meanwhile, the equipment investment and the operating cost are reduced; and the disposal requirements such as sludge incineration, fertilizer preparation and the like are met by conditioning with the additive and sludge recycling is achieved.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a sludge treatment method that realizes sludge resource disposal with high efficiency and energy saving, and belongs to the category of sludge treatment in the field of environmental protection. By improving the sludge treatment method and modular design, the application of the sludge treatment method of the present invention is popularized, the cost of traditional sludge treatment is reduced, and the sludge resource disposal is realized. Background technique [0002] At present, the sewage treatment method is mainly based on the activated sludge method, resulting in a large amount of sludge, every 10,000 m 3 After the sewage is treated, the amount of sludge produced (based on a moisture content of 80%) is generally about 5-10t. The traditional treatment methods are mainly concentration, anaerobic digestion, landfill, incineration, etc. for agricultural use. The moisture content of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/14C10L5/46
CPCY02E50/30Y02E50/10
Inventor 常邦华彭福全周谷平宦国平孙颖李靖梅
Owner 南京扬子江生态环境产业研究院有限公司
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