Sludge drying device and sludge drying method

Abstract

The invention discloses a sludge drying device and a sludge drying method. The sludge drying device comprises a cylindrical casing which is vertically arranged, a blower which is communicated with an air inlet, an impeller for producing an eddy current cyclone, and an ultrasonic generator arranged on the impeller, wherein a drying cavity is formed in the cylindrical casing, and an air outlet and the air inlet which are communicated with the drying cavity are separately formed in the upper end surface and the lower end surface of the cylindrical casing; the impeller is coaxially arranged at the bottom of the drying cavity; the air outlet and the drying cavity are coaxially arranged. According to the sludge drying device and the drying method disclosed by the invention, high-pressure hot air is inputted into the drying cavity by the blower, and forms the eddy current cyclone under the effect of the impeller arranged at the bottom of the drying cavity, so that sludge in the drying cavity helically rises; under the effect of centrifugal force, sludge particulates with different water contents are separated, and the refining of the sludge particulates is accelerated by the collision between the sludge particulates; besides, through ultrasonic waves, zooglea structures are damaged, and the inner parts of the sludge particulates are cavitated, so that the dewatering speed of the sludge particulates and the refining of the sludge particulates are improved, and the drying efficiency is improved.

Description

technical field [0001] The invention relates to sludge drying technology, in particular to a sludge drying device and a drying method. Background technique [0002] There are currently two main methods for the sludge produced in the sewage treatment process and domestic wastewater. One is to use landfill and incineration for treatment, which can effectively obtain heat energy from the sludge, reduce treatment costs and not Cause secondary pollution, and the other is reprocessing, which treats sludge as fertilizer for secondary use. Both of the above two methods need to carry out drying treatment on the sludge. After the drying treatment, the water content of the sludge is reduced, and the overall weight is reduced, thereby reducing the transportation cost of the sludge. [0003] The water in the sludge mainly exists in the following ways: interstitial water, which accounts for about 70% of the total water in the sludge, and the interstitial water is easy to be excluded, and...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a sludge drying device and drying method, and solve the technical problems in the prior art that the treatment of bound water and adhering water is difficult, energy consumption and cost are high, and it is easy to cause harm to the human body

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