Sludge storing and preheating system utilizing sludge drying tail gas afterheat

A sludge storage and sludge drying technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve problems such as large energy consumption, reduce operating costs, ensure discharge standards, and increase initial temperature.

Inactive Publication Date: 2007-11-07
ZHEJIANG UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sludge produced from the sewage treatment plant, through mechanical dehydration, generally has a moisture content between 75% and 85%. Through the drying process, if the moisture content of the sludge is reduced to below 40%, the volume can be reduced by two-thirds above, but it takes a lot of energy to complete this step

Method used

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  • Sludge storing and preheating system utilizing sludge drying tail gas afterheat

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Embodiment Construction

[0011] As shown in the attached figure, the sludge storage and preheating system using the waste heat of sludge drying tail gas has a closed sludge storage 1, and one end of the closed sludge storage 1 is provided with a first sludge input port 9 and a second The sludge input port 10, the closed sludge storage 1 is provided with a mud pusher rail 4, and the mud pusher rail 4 is equipped with a first mud pusher 2 and a second mud pusher 3, and the closed sludge The other end of the storage house 1 is provided with a first sludge output port 11 and a second sludge output port 12, the first sludge output port 11 and the second sludge output port 12 are connected with a sludge feeding device 13, and the sludge The feeding device 13 is connected to the sludge feed port 25 of the first sludge drying device 30 through a conveyor belt, and the first sludge drying device 30 and the second sludge drying device 31 pass through the third damper 28 and the second sludge drying device 31 res...

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Abstract

The present invention discloses sludge storing and preheating system utilizing the afterheat of sludge drying tail gas. The system consists of one upper part and one lower part, the upper part has a closed sludge storing household, a sludge shifter, a sludge shifter track, a sludge inlet, a sludge outlet and a gas exhaust unit; and the lower part has walls for supporting the bottom of the closed sludge storing household, a flue, a high pressure water pipe, and a water collecting and guiding set. The system with circulating utilization of energy can lower power consumption for drying sludge, reduce cost and lower the pollution load of sludge drying tail gas.

Description

technical field [0001] The invention relates to a sludge storage and preheating system which utilizes the residual heat of sludge drying tail gas. Background technique [0002] When urban domestic sewage and industrial wastewater are purified, they will produce sludge equivalent to 0.3% to 0.5% of the volume of sewage or 1% to 2% of the quality of sewage. According to relevant data, by 2010 and 2020, the discharge of urban sewage in my country will reach 440×10 8 m 3 / day and 536×10 8 m 3 / day, which means that with the rapid development of the country's economy and the rapid growth of urban population, the amount of urban sewage is constantly increasing. At the same time, people's requirements for environmental quality are also getting higher and higher. The treatment rate will also continue to increase, and the amount of sludge produced by sewage treatment plants will increase day by day. [0003] Sewage treatment plant sludge is an extremely complex heterogeneous bod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 翁焕新苏闽华陈海燕
Owner ZHEJIANG UNIV
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