Sludge drying method and system

A sludge drying and sludge technology, applied in dehydration/drying/concentrated sludge treatment, energy wastewater treatment, etc., can solve the problems of thermal drying construction cost, high operating cost, low air drying cost, and low air drying efficiency , to achieve the effect of resource utilization, best drying effect and fast drying speed

Active Publication Date: 2014-05-28
联智同达(苏州)环境科技有限公司
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Problems solved by technology

The construction cost and operation cost of thermal drying are too high, the construction cost of solar energy is high, and the applicable area is narrow
The cost of mechanical filtration and air dryin

Method used

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  • Sludge drying method and system
  • Sludge drying method and system
  • Sludge drying method and system

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[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0032] Combine figure 1 , figure 2 As shown, the sludge drying method disclosed in the present invention adopts a three-stage drying method of mechanical pressure drying, stacked air drying and turning and throwing air drying to dry the wet sludge, that is, the dry sludge powder is first combined with the wet sludge. After the sludge is uniformly mixed, it is preliminarily dried by mechanical filter press, then the sludge cake is crushed and stacked and air-dried, and finally the semi-dried sludge powder is put into a drying tank for turning and air drying. Combined with the sludge drying system disclosed in the first preferred embodiment of the present invention, the sludge drying process specifically includes:

[0033] First, the dry sludge powder and wet sludge are sent to the mixing m...

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Abstract

The invention discloses a sludge drying method and system. The sludge drying method comprises the following steps: pre-drying wet sewage sludge with the moisture content of above 80% by adopting a mechanical filter pressing method so as to reduce the moisture content of the sludge to about 65%; crushing the pre-dried sludge into sludge powder, dispersing and flatly paving the sludge powder on baffle plates with fine meshes, piling up multiple layers of baffle plates, leaving voids among the sludge powder, and air-drying the sludge powder by using normal temperature air so as to reduce the moisture content of the sludge to about 45%; and feeding the piled and air-dried sludge powder into a drying groove, turning and throwing by using a turning and throwing device, and meanwhile air-drying the sludge powder by using the normal temperature air so as to reduce the moisture content of the sludge to below 30%. Dry air absorbing moisture in the sludge is discharged, subjected to purification treatment and emitted after meeting the environmental protection requirements, and the dried sludge is discharged from the drying groove and is further treated. According to the sludge drying method, external heat sources are not needed, and the rapid drying of sludge is realized at relatively low operating cost.

Description

technical field [0001] The invention relates to a sludge drying method and system, in particular to a sludge drying method and system integrating mechanical pressure filtration and air drying. Background technique [0002] With the expansion of sewage treatment scale and the improvement of standards, the amount of sludge generated continues to increase. In addition to the sludge accumulated in the past, China's sludge treatment and disposal has become a major issue in the field of sewage treatment. [0003] The moisture content of the sludge generated from the sewage treatment plant is very high, generally >80%. The sludge must be dried first to facilitate further disposal. At present, the main technical routes of sludge drying include thermal drying, mechanical drying, air drying, and solar drying. The construction cost and operation cost of thermal drying are too high, and the construction cost of solar energy is high, and the applicable area is narrow. The cost of me...

Claims

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Application Information

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IPC IPC(8): C02F11/12
CPCY02W10/37
Inventor 王兢
Owner 联智同达(苏州)环境科技有限公司
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