Method for manufacturing building material by using high-water content sludge in urban sewage treatment plant

A technology of urban sewage and high water content, applied in the field of comprehensive resource utilization to achieve the effect of solving secondary pollution

Inactive Publication Date: 2012-08-01
陈宏胜
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a method for producing wall materials by mixing fresh sludge from urban sewage treatment plants with other raw materials. One is to utilize and digest a large amount of sludge discharged from urban sewage treatment plants, and the other is to The heat generated by the self-combustion of organic matter in the sewage sludge discharged from the sewage treatment plant supplements the heat of the high-temperature roasting and sintering products. The secondary pollution of sludge is currently one of the best ways to realize the harmless, resourceful and industrialization of sludge in urban sewage treatment plants

Method used

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  • Method for manufacturing building material by using high-water content sludge in urban sewage treatment plant
  • Method for manufacturing building material by using high-water content sludge in urban sewage treatment plant
  • Method for manufacturing building material by using high-water content sludge in urban sewage treatment plant

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Embodiment 1

[0022] The sample used in this example is fresh sludge from Fengtai Sewage Treatment Plant. The experimental manufacturer is Tianbao Active Coal Gangue Mixed Raw Material Factory in Fengtai County. Fengtai Sewage Treatment Plant is one of the sewage treatment projects of the National South-to-North Water Diversion Project and was completed in August 2008. Putting into operation, the first phase of the project will treat 25,000 tons of sewage per day, and the actual daily processing will be 22,000 tons, and the annual output of sludge with a moisture content of 80% will be about 3,000 tons.

[0023] The main characteristics and heavy metal content of fresh sludge are shown in Table 1 and Table 2:

[0024] Table 1 Basic characteristics of sludge samples

[0025]

[0026] Table 2 Sludge sample (dry weight) heavy metal content (mg / kg)

[0027] Cu

Zn

Pb

Cd

Cr

Ni

Hg

As

254.1

462.5

121.6

1.9

101.2

49.7 ...

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Abstract

The invention relates to a method for producing a wall material by mixing fresh sludge in an urban sewage treatment plant and other raw materials. A large amount of sludge discharged by the urban sewage treatment plant is utilized and digested, and heat produced by combustion of organic matter in the sludge discharged by the sewage treatment plant be supplemented to a high-temperature roasting sintering product, so the heat value of the sludge is utilized, harmful and cancer-causing toxins are decomposed at high temperature, the problem of secondary pollution caused by sludge in the urban sewage treatment plant is solved completely, and the method is the current optimum way which realizes innocence, recycling and industrialization of sludge in the urban sewage treatment plant.

Description

technical field [0001] The invention relates to a method for comprehensive resource utilization, in particular to a method for making building materials using sludge from urban sewage treatment plants with high water content. Background technique [0002] With the continuous increase of my country's population, the acceleration of economic development and urbanization, the public's requirements for environmental quality are increasing day by day. At the same time, my country's water resources are becoming more and more scarce, and water pollution is becoming more and more serious. The national wastewater discharge amounted to 589.2 billion tons, of which urban domestic wastewater discharge was 35.48 billion tons, accounting for 60.2% of the total wastewater discharge. [0003] In 2011, the daily treatment capacity of my country's urban sewage treatment plants reached 43.8 billion tons. According to this data, 31.364 million tons of sludge containing 80% water will be produced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00
Inventor 陈宏胜黄毅张怀功
Owner 陈宏胜
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