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Method for processing sludge resources

A treatment method and recycling technology, which is applied in the field of sludge recycling, can solve the problems of reducing drying materials and occupying the effective volume of the dryer, and achieves the effects of less heat consumption, fast dehydration speed and low drying temperature

Inactive Publication Date: 2010-03-17
天津紫荆能源技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the back-mixing process in the drying process completes its mission, it also occupies the effective volume of the dryer. When the total number of heat to the dryer remains unchanged, the actual amount of dried materials is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A treatment method for sludge recycling, comprising the following steps:

[0030] (1) mixing the dried stalk after pulverization with the sludge cake with a moisture content of 82%; making the mixture a moisture content of 58%;

[0031] (2) heating and drying until the water content of the mixture is 23%;

[0032] (3) Produce fuel particles through a granulator;

[0033] (4) The fuel particles are used for heat supply in the drying step.

Embodiment 2

[0035] A treatment method for sludge recycling, comprising the following steps:

[0036] (1) mixing the dried shavings after the pulverization with the sludge cake with a moisture content of 85%; making the mixture a moisture content of 59%;

[0037] (2) heating and drying until the water content of the mixture is 25%;

[0038] (3) Produce fuel particles through a granulator;

[0039] (4) The fuel particles are used for heat supply in the drying step.

Embodiment 3

[0041] A treatment method for sludge recycling, comprising the following steps:

[0042] (1) Mix the dried sawdust after pulverization with the sludge cake with water content of 80%; make the mixture with water content less than 54%;

[0043] (2) heating and drying until the water content of the mixture is 20%;

[0044] (3) Produce fuel particles through a granulator;

[0045] (4) The fuel particles are used for heat supply in the drying step.

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Abstract

The invention discloses a method for processing sludge resources. The method comprises the following steps: (1) evenly mixing the crushed dry plant-based wastes generated in the industrial and agricultural production with sludge cake with moisture content of 80wt%-85wt%; the moisture content of the mixture is lower than 55 wt%-60wt%; (2) the mixture is heated and dried until the moisture content thereof is 20 wt%-25wt%; (3) fuel particles are produced through a granulating machine; and (4) the fuel particles are used for heat supply for the drying step. Since the plant-based wastes provided with low moisture content and generated in the industrial and agricultural production are mixed with the sludge cake, the dehydration speed of the mixture in a drying apparatus is higher than that of the single sludge cake, the drying temperature is lower, and the heat consumption is less. The fuel particles obtained by the method can be taken as the energy resources to replace the fossil energy forsewage treatment, and simultaneously, the obtained heated steam also can be taken as resource to sell.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a sludge resource recovery treatment method. Background technique [0002] Sludge is a solid-liquid mixture, and its solid-liquid ratio is relatively fixed without external intervention. The sludge produced in the operation of municipal environmental protection facilities in cities and towns is called municipal sludge. According to its source and properties, it can be divided into water plant sludge, sewage sludge, dredging sludge, trench sludge and pumping station system grid slag. [0003] The most important step in sewage treatment is to separate the water in the sludge, reduce the volume of the sludge, and reduce the volume load of the subsequent treatment sludge. The moisture contained in sludge can be divided into two categories: free water and bound water. Free water is not combined with sludge and is not affected by sludge particles, and can be removed by concentration proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44C10L5/46C02F11/00C02F11/12
CPCY02E50/30Y02E50/10
Inventor 马云生刘汉桥张曙光孙宝明
Owner 天津紫荆能源技术有限责任公司
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