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Sewage sludge advanced treatment method

A technology for advanced treatment and sewage sludge, applied in sludge treatment, dehydration/drying/concentrated sludge treatment, water/sludge/sewage treatment, etc. Mud handling capacity etc.

Inactive Publication Date: 2014-10-15
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention aims at the problems in the above-mentioned prior art that increasing the flocculant will increase the sludge treatment capacity, low freezing efficiency, and low recovery rate of waste heat from incineration, and provides a treatment process that does not increase the sludge treatment capacity. Sewage sludge advanced treatment method with high efficiency and high energy utilization

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023]As shown in the figure, a sewage sludge advanced treatment method of the present invention is realized based on a sludge treatment device, which includes a filter press device 1, a crushing device 2, a drying device 3, an incineration device 16 and a waste heat boiler 17, The filter press device 1 carries out the pressure filtration treatment on the sludge, and then the crushing device 2 carries out the crushing treatment. After the sludge is crushed, it enters the drying device 3 for drying treatment, and the dried sludge particles are sent to the incineration device 16 for incineration (from the drying device. The feeding port enters the incineration device through the conveying mechanism 23), and the high-temperature flue gas produced by incineration enters the waste heat boiler 17;

[0024] The sewage sludge treatment device also incl...

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Abstract

The invention discloses a sewage sludge advanced treatment method which is based on a sewage sludge advanced treatment device. The sewage sludge advanced treatment device comprises a sludge freezing container, a freeze drying energy circulating system and a waste heat recovery device. The freeze drying energy circulating system comprises a compressor, an evaporator, a condenser and a first heat exchanger arranged in the sludge freezing container. The air outlet end of the compressor is connected with the condenser, the condenser is connected with the evaporator through a throttling element, and the evaporator is connected with the air inlet end of the compressor through the first heat exchanger. The waste heat recovery device comprises a waste heat boiler and a heat conduction oil pipe arranged in the waste heat boiler, the heat conduction oil pipe is connected with a second heat exchanger, oil conduction oil enters the second heat exchanger to transfer heat to air, and the air heated is respectively conveyed to a drying device and the sludge freezing container to be used for sludge drying and unfreezing. According to the sewage sludge advanced treatment method, the sludge treatment amount is not increased in the treatment process, and recycling of working medium energy improves sludge freezing efficiency and heat utilization rate.

Description

technical field [0001] The invention relates to the field of sewage sludge treatment, in particular to a method for advanced treatment of sewage sludge. Background technique [0002] A large amount of sludge is produced in the process of sewage treatment, which accounts for about 0.3%-0.5% of the treated water. The investment and operation cost of sludge treatment are very huge, and the cost of sludge treatment generally accounts for 20% of the operating cost of sewage treatment plants. %-50%, bringing a heavy burden to sewage treatment. Sludge treatment methods mainly include conditioning, dehydration, drying, and then disposal measures such as incineration, landfill, and resource utilization. Sludge dewatering is a very important part of sludge treatment and plays an important role in the subsequent treatment and disposal of sludge. The key to sludge dewatering is to improve the dewatering performance of sludge. The current traditional treatment method is to condition by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/20C02F11/12
Inventor 饶宾期欧阳华兵
Owner CHINA JILIANG UNIV
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