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Smart sludge drying method

A sludge drying and sludge technology, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of large land occupation of sludge ponds, air and environmental pollution, air pollution, etc. problem, to achieve good heating effect, improve utilization rate, and abundant solar energy resources

Inactive Publication Date: 2017-09-22
ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

Sludge incineration is a better treatment method, but the three wastes produced during the incineration process still continue to cause secondary pollution. sources of pollution, will cause new pollution to the air and the environment
Settling tanks are used for sludge sedimentation. This method has low investment and high technical feasibility. However, because the sludge tank covers a large area, the cost is high, and it must be open to the open air, the odor in the sludge will seriously pollute the air.

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Embodiment Construction

[0029] like Figure 1 to Figure 5 Shown, be a kind of intelligent sludge drying method of the present invention, comprise the steps:

[0030](a) Pretreatment reaction: Add water and flocculant to the reaction tank, turn on the mechanical agitator, stir to form a mixed solution, pump the sludge into the reaction tank with a sludge pump, and continue stirring to make the sludge and flocculant The solution was mixed well, then allowed to stand for 1 to 2 hours, and then filtered. Under the action of the flocculant, the organic molecules in the sludge undergo a rapid gelation reaction to form flocs, the degree of dispersion is reduced, the water holding capacity of the sludge is reduced, and the separation of sludge and water is promoted, thereby increasing the strength and stabilizing the heavy metals in the sludge. The effect can effectively control the secondary pollution after use, and the organic matter is not easy to lose, thereby increasing the organic matter content of th...

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Abstract

The invention discloses a smart sludge drying method. The method comprises the following steps: (a) performing a pretreatment reaction; (b) mixing dry sludge with wet sludge; (c) preheating a device; (d) dehydrating and drying; (e) treating tail gas. The smart sludge drying method has the advantages of easiness in operation, high drying efficiency, short drying time, good drying effect and capabilities of lowering the drying cost, continuously drying a large amount of sludge and effectively lowering the water content of the sludge.

Description

technical field [0001] The invention belongs to the field of sludge treatment, in particular to an intelligent sludge drying method. Background technique [0002] Sludge is one of the main by-products after sewage treatment, accounting for about 0.3%-0.5% (volume) or 1%-2% (quality) of the sewage treatment volume. With the development of industrial and agricultural production and the continuous construction of sewage treatment plants around , my country's industrial and domestic sewage treatment volume is increasing rapidly, and more sludge is bound to be produced. The composition of sludge is very complex. In addition to a large amount of water, it also contains a large amount of organic matter, refractory organic matter, various trace elements, pathogenic microorganisms, parasite eggs and heavy metals. If it is not treated and discharged randomly, it will cause secondary pollution to the environment, and the difficulty of re-treatment of this pollution is quite large. [...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12C02F11/18F24J2/04F27D17/00
CPCC02F11/121C02F11/122C02F11/14C02F11/18F27D17/004F27D2017/007Y02P10/25Y02W10/37
Inventor 刘学应阙家珍毛琼晶
Owner ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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