Sludge treatment method and sintered sludge ceramsites produced by same

A technology for sludge treatment and sludge ceramsite, which is applied in the fields of sludge treatment, water/sludge/sewage treatment, ceramic material production, etc. It can solve the problems of polluting groundwater, huge disposal sites, and air pollution by incinerating sludge. To achieve the effect of low cost, reduced pressure, and light wall

Inactive Publication Date: 2010-08-18
BEIJING SIFANGRUGANG CONCRETE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such treatment method has the following disadvantages and difficulties: (1) Since the sludge is in a paste state, the moisture content of the original sludge is as high as more than 95%, and it must be dehydrated and dried many times, requiring expensive dehydration and drying equipment and huge energy (2) Incineration of sludge will seriously pollute the air; (3) Because sludge contains a variety of heavy metals and other toxic and harmful substances, these heavy metals and toxic and harmful substances will seep into groundwater after landfill (4) The dehydrated and dried sludge is incinerated and landfilled as waste. Not only does the sludge not be recycled, but the huge dehydration, drying, incineration, landfill and other costs and expenses are undoubtedly serious waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix the sludge and quicklime powder according to the weight ratio of 2:1, and stir well to make the calcium oxide in the quicklime and the water in the sludge react chemically to form sludge hydrated lime; mix the sludge hydrated lime and loess according to the weight ratio of 2:3 Proportionally mixed and fully stirred to form loess sludge hydrated lime; use a granulator to granulate the loess sludge hydrated lime to form loess sludge hydrated lime particles; sinter the loess sludge hydrated lime particles to form sintered sludge ceramsite.

Embodiment 2

[0020] Mix the sludge and quicklime powder according to the weight ratio of 3:1, and stir well to make the calcium oxide in the quicklime and the water in the sludge react chemically to form sludge hydrated lime; mix the sludge hydrated lime and loess powder according to the ratio of 1:1 Mixing in proportion by weight, then adding an appropriate amount of fly ash, fully stirring to form loess sludge slaked lime; using a granulator to granulate loess sludge slaked lime to form loess sludge slaked lime particles; sintering loess sludge slaked lime particles , that is, the formation of sintered sludge ceramsite.

Embodiment 3

[0022] Mix the sintered sludge ceramsite, cement, and water obtained in Example 1 or Implementation 2, and fully stir to form concrete containing sintered sludge ceramsite. The concrete is used to prefabricate the board, and after the concrete is solidified, it can be used as a thermal insulation board or a sound insulation board. The concrete can also be used to make ceramsite blocks, and the ceramsite blocks are used to build non-load-bearing walls in building structures.

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PUM

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Abstract

The invention discloses a sludge treatment method and sintered sludge ceramsites produced by the same. The sludge treatment method of the invention comprises the following steps: dehydrating quicklime; stirring earth; pelleting; and sintering. The sintered sludge ceramsites produced by the sludge treatment method of the invention have the advantages of light weight, thermal insulation, acoustic insulation and the like, can be used as a heat insulating material and an acoustic insulating material, and can also be used for manufacturing ceramic blocks. The sludge treatment method of the invention has the advantages of low cost, environmental protection, circulation use of sludge, and capability of producing the sintered sludge ceramsites having multiple uses.

Description

technical field [0001] The invention relates to a method for treating and recycling sludge and products produced by the method, in particular, the invention relates to a method for producing sintered ceramsite by utilizing the sludge produced by sewage treatment. Background technique [0002] Sewage treatment is the process of concentrating the impurities in sewage into semi-solid form and then separating them from the fluid. The separated paste concentrate is sludge. Sludge treatment has always been a problem that plagues the sewage treatment industry. Sludge treatment equipment accounts for about 40%-60% of the infrastructure investment of sewage treatment plants, and about 50% of the cost of sewage treatment plants is sludge treatment costs. [0003] The traditional sludge treatment method is to firstly dehydrate and dry the sludge, and then incinerate or landfill it. Such treatment method has the following disadvantages and difficulties: (1) Since the sludge is in a pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/22C04B35/622C02F11/00
CPCY02P40/60
Inventor 梁林华梁彬
Owner BEIJING SIFANGRUGANG CONCRETE PROD
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