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A sludge drying system and method at low temperature

A sludge and low-temperature technology, applied in dehydration/drying/thickened sludge treatment, etc., can solve the problems of high drying operation cost and limited reduction effect

Active Publication Date: 2018-06-12
SUEZ WATER TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect of high drying operation cost due to the limited reduction effect of traditional sludge mechanical dehydration technology, and provide a low-temperature drying sludge reduction system and method. By selecting economical low-temperature drying technology, Reduce the unit cost of the heat source, thereby reducing the operating cost of sludge drying to an economically reasonable level

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  • A sludge drying system and method at low temperature
  • A sludge drying system and method at low temperature

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Embodiment Construction

[0018] Attached below figure 2 To further describe the present invention, it should be understood that the content described here is only for illustrating and explaining the present invention, and is not intended to limit the present invention.

[0019] The sludge after pressure filtration and dehydration presents a loose form, which is automatically unloaded into the sludge storage silo by its own weight for temporary storage, and is transported from the bottom of the silo to the sludge forming machine CP1 through the shaftless screw P4, where it is cut into lengths of 3 to 5 cm The strips or granules are distributed to the drying belt of the belt dryer LBT1. During the process of traveling with the drying belt, the sludge particles are in contact with the hot air flow perpendicular to the drying belt, and gradually lose moisture and get dried. Since the time that the sludge particles are in contact with the airflow can be adjusted, the moisture content of the dried sludge c...

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Abstract

The invention discloses a low-temperature drying system and a method of sludge. The system comprises a belt dryer, a drying fan, a cooling fan, an air heater and a particle cooler. Sludge particles are contacted with a hot air flow perpendicular to a drying belt during traveling with the drying belt and loses moisture gradually to be dried; the dried sludge particles are transferred to a cooling belt subsequently; the dried sludge is contacted with a cold air flow on the cooling belt to be cooled; finally, the dried and cooled sludge particles are sent into a bin for storage; with the adoption of an economical low-temperature belt drying technology, heat loss required by drying is reduced, so that the heat loss cost of the drying is greatly lowered; and the operating expense of the drying is reduced to an economically reasonable level.

Description

technical field [0001] The invention relates to the technical field of sludge reduction, in particular to a novel low-temperature sludge drying system. Background technique [0002] Sludge reduction is the primary goal of sludge treatment and disposal. Existing sludge reduction technologies mainly include mechanical dehydration, drying, incineration, and cracking. The general treatment process is to first rely on mechanical dehydration for preliminary weight reduction, then to fully reduce weight through drying, and finally to completely reduce weight by incineration or cracking as needed. In the whole treatment process, drying is a very important intermediate link, and it is also a link where heat energy consumption occurs intensively. Traditional mechanical dehydration technologies mainly include belt filter press, centrifugal separation and plate-and-frame filter press. If filter press is used for dehydration, one of the main problems is that the filter cake formed on th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12
Inventor 裴瀚迪陆子维
Owner SUEZ WATER TREATMENT CO LTD