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Organic fine-particle sludge drying method and movable drying system

An organic, mobile technology for dewatering/drying/concentrating sludge treatment

Active Publication Date: 2014-11-19
华东理工常熟研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008]1. The purpose of the present invention is to solve the problem that the drying method in the prior art needs to be combined with other methods and microwave methods to achieve the purpose of drying, the cost is high, and the equipment However, a further drying method and a mobile drying system for dehydrated organic fine-grained sludge using microwaves are proposed to meet the needs of subsequent treatment and disposal, and have dual effects of environmental protection and economic utilization.

Method used

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  • Organic fine-particle sludge drying method and movable drying system

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Embodiment 1

[0036] Organic fine-grained sludge mobile drying system, including sludge dispersion and loading device, sludge leveling device, waste heat utilization device, microwave drying device, microwave leakage prevention device, waste gas collection and purification device, heat exchange device, condensed water collection The outlet of the sludge dispersing and loading device is connected to the sludge leveling device, the outlet of the sludge leveling device is connected to the waste heat utilization device, and the outlet of the waste heat utilization device is connected to the anti-microwave leakage device. The collection and purification device is connected to exhaust gas; the anti-microwave leakage device is installed at the inlet and outlet of the microwave drying device; the microwave drying device is connected to the inlet of the heat exchange device, and the outlet of the heat exchange device is connected to the waste heat utilization device and waste gas collection The purif...

Embodiment 2

[0049] The difference from Example 1 is that domestic sewage sludge with a water content of 65% is selected, and a 2450MHz microwave source is used to work continuously. The sludge is 12.2 cm thick (approximately equal to 3×10 8 / 2450MHz), the microwave power is 1.0 kg water / electric conversion, and can be dried to 40% water content.

Embodiment 3

[0051] The difference from Example 1 is that paper mill sludge with a moisture content of 65% is selected, and a 915MHz microwave source is used to work continuously. The sludge is 32.8 cm thick (approximately equal to 3×10 8 / 915MHz) cake shape, microwave power 1.0 kg water / electricity conversion, can be dried to 45% water content.

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Abstract

The invention discloses an organic fine-particle sludge drying method and a movable drying system. The method and the system are realized with a microwave selective absorption characteristic. Microwave is the main approach of drying, and is not an auxiliary measure. According to the invention, the method is not aimed at a specific type of organic fine-particle sludge. With the method provided by the invention, high-efficiency dehydration is realized, wherein the dehydration efficiency can reach 1.6kg water / kWh. With the method, an existing method for drying with a combination of various approaches and microwave technology is simplified; production cost is reduced; and efficiency is improved. Through the arrangement of a heat exchanger device, heat can be efficiently recycled, and energy recycling rate can be improved. Compared with prior arts, a device designed according to the invention has a smaller volume. The device can be vehicle-mounted and can be moved, such that sludge drying treatment can be carried out at any place. Therefore, with the method and the system, sludge drying is flexible and convenient.

Description

technical field [0001] The invention relates to a method and a mobile system for further drying dehydrated organic fine-grained sludge by using microwaves, and belongs to the technical field of solid waste reduction and resource utilization. Background technique [0002] Organic fine-grained sludge refers to sludge with a water content of more than 90% and an organic matter content of more than 95% in dry sludge. Reducing the moisture content of sludge generally includes two steps: dehydration and drying. The sludge with a water content greater than 90% can be reduced to a water content of 50%-65% by dehydration, and then further reduced to 5%-35% by drying. Dehydration technologies mainly include direct mechanical dehydration, dehydration with conditioner addition, microwave-assisted dehydration, electro-osmosis dehydration, ultrasonic-assisted dehydration and enzyme engineering dehydration, etc. There are many related research and application technologies. [0003] The c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 乔秀臣
Owner 华东理工常熟研究院有限公司
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