Sludge drying system and method

A sludge drying and dryer technology, which is applied in dewatering/drying/concentrating sludge treatment and other directions, can solve the problems of low temperature corrosion of conveying pipelines and equipment, high operation and maintenance costs, and high equipment failure rate, and achieve extended operating life. , The effect of reducing operation and maintenance costs and operating safety

Active Publication Date: 2014-12-03
凤阳县经济发展投资有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technical route is that the dried gas medium after cooling is in a state of water vapor saturation, the subsequent transportation pipelines and equipment are prone to low-temperature corrosion, the equipment failure rate is high, and the operation and maintenance costs are high

Method used

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  • Sludge drying system and method

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with embodiment.

[0029] see figure 1 , a sludge drying system, including a boiler 17, the exhaust outlet of the boiler 17 is connected to the chimney 15 through a pipeline, and the other is connected to the first air inlet of the No. 1 mixer 10 with a three-way structure, and the No. 1 mixer The exhaust port of 10 is connected to the air inlet of the fluidized bed dryer 2 through the fluidized air duct 9, and the fluidized air duct 9 is provided with a fluidizing fan 4, and the exhaust port of the fluidized bed dryer 2 is connected to three The inlet of the No. 2 mixer 11 of the open structure, the first outlet of the No. 2 mixer 11 is connected to the inlet of the condenser 6, and the gas outlet of the condenser 6 is connected to the second inlet of the No. 1 mixer 10. mouth, the condenser 6 is provided with a demister, a spray head and a sump in sequence from top to bottom. The cooling water is s...

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Abstract

The invention relates to a sludge drying system and method. A flue gas discharged from a boiler is used as fluidized gas of a drying device of a fluidized bed to dry wet sludge, discharged exhaust gas with high concentration of oxygen is introduced into the boiler for carrying out incineration treatment, the hot flue gas discharged from the boiler is used for supplementing the fluidized gas such that the temperature of the fluidized gas is higher than the dew point temperature and the concentration of oxygen in the fluidized gas keeps away from an explosion limit. According to the technical scheme disclosed by the invention, the sludge drying system comprises a boiler, wherein one path of a flue gas exhaust outlet of the boiler is connected with a chimney, the other path of the flue gas exhaust outlet of the boiler is connected with a first gas inlet of a 1# mixer with a three-way structure, a gas exhaust outlet of the 1# mixer is connected with a gas inlet of the drying device of the fluidized bed, a gas exhaust outlet of the drying device of the fluidized bed is connected with a gas inlet of a 2# mixer with a three-way structure, a first gas exhaust outlet of the 2# mixer is connected with a gas inlet of a condenser, a gas outlet of the condenser is connected with a second gas inlet of the 1# mixer, and a second gas exhaust outlet of the 2# mixer is connected to a gas inlet of the boiler; boiler tube bundles are arranged inside a boiler hearth and the boiler tube bundles are communicated with heating tubes of the drying device of the fluidized bed.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge drying system and method. Background technique [0002] With the rapid increase in the amount of sewage treatment, the sludge production has also increased sharply. The moisture content of the dehydrated wet sludge is as high as 75%, containing toxic and harmful substances such as heavy metals, pathogens and persistent organic substances. The wet sludge has a large volume and is easy to deteriorate. , Difficult to handle, if not handled properly, it is easy to cause secondary pollution. [0003] After the sludge is dried, the volume can be reduced by more than 80%. The stability and solidification performance of the dried sludge is greatly improved, it is not easy to deteriorate, it is convenient for transportation and storage, and it is conducive to further resource utilization. The drying treatment of wet sludge has been applied more and more. [0004] Wet sludge cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 李志伟钱瑞林何秀锦
Owner 凤阳县经济发展投资有限公司
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