Technology for manufacturing brick by using dried sludge

A technology for making bricks and sludge from sludge, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. Excellent workability and high strength

Active Publication Date: 2012-01-11
南京鑫翔环保产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the sludge with high water content is directly blended, or the dried sludge is mixed according to the mass percentage of 10-15%, and then mixed to make bricks, but the effect is poor, and it cannot be stirred evenly, which also limits The amount of sludge added, after the test, it was found that the bricks made will agglomerate (that is, due to uneven mixing and different material properties, plaques will be formed on the surface or inside of the brick after sintering), which affects the strength and is easy to crisp. Sludge does not reach the stated 10-15% mass percentage

Method used

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  • Technology for manufacturing brick by using dried sludge
  • Technology for manufacturing brick by using dried sludge
  • Technology for manufacturing brick by using dried sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Ingredients: According to the ratio of dried urban sludge: coal gangue = 30:70, the raw materials are mixed, and the particle size of the crushed material is required to be ≤5cm, the particle size of the hammered material is required to be ≤1cm, and the particle size of the sieve ≥6 mesh). Then enter the brick making process according to the ordinary brick making process.

[0026] Forming: control extrusion pressure ≥ 3.5MPa, vacuum degree ≥ 98%.

[0027] Sintering: sintering for 3 hours under the condition of controlling the maximum temperature of 1080 degrees to obtain microporous bricks (blocks), such as figure 2 shown.

[0028] After leaving the kiln, it is sorted and stored in the cargo yard. The appearance size is qualified, the brick strength is ≥ MU10 and the block is ≥ MU3.5, and it is qualified for freezing and fusion. The quality produced meets the relevant national standards (GB5101-2003, GB13544-2000, GB13545-2003 standards).

Embodiment 2

[0030] The specific process steps are the same as in Example 1, except that the ratio of raw materials is as follows: dried municipal sludge: shale: internal fuel = 35:60:5.

[0031] The sintering is controlled under the condition that the maximum temperature is 1050 degrees, and sintering is performed for 2.5 hours.

Embodiment 3

[0033] Concrete process step is identical with embodiment 1, and difference is that raw material ratio is as follows: sludge after drying: the urban sludge slag after incineration: coal gangue=20: 30: 50

[0034] Under the condition of sintering control with a maximum temperature of 1100 degrees, sintering for 1.5 hours to obtain a microporous porous block, such as image 3 shown.

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Abstract

The invention discloses a technology for manufacturing brick by using dried sludge. The process comprises the following steps: stirring mixed materials; pulverizing raw materials by jaw breaking and hammer breaking; evenly stirring; screening the pulverized mixed material by a vibrating screen; carrying out upward mixing and rolling lamination on the mixed material screened by the vibrating screen; putting into a brut cellar; conveying the aged raw material into a shaper by a conveyer belt to shape the blank; conveying into a drying kiln for drying by a cutting, stacking and transporting car;then, sintering in a calcining kiln; and obtaining common sintered bricks, porous bricks or hollow bricks after the sintering is finished. According to the technology, sludge instead of clay is addedinto various raw materials. On the aspect of producing sintered bricks with high doping volume by utilizing municipal sludge, the maximum municipal sludge doping amount can reach 50%. The technology has obvious breakthrough on the aspects of sludge decrement and reclamation, and sludge is consumed to realize the purpose of changing waste material into things of value.

Description

technical field [0001] The invention belongs to the harmless treatment and resource utilization technology of urban sludge, in particular to a brick-making process using dried sludge. Background technique [0002] Municipal sludge refers to the solid waste generated during the treatment of urban domestic sewage and industrial wastewater, and is a regular product of urban sewage treatment plants. This sludge has a high water content, is perishable, has a strong odor, and contains toxic substances such as dioxins, bacteria, parasite eggs, and heavy metals. Therefore, it is necessary to carry out harmless treatment and reuse of sludge, and how to make full use of the dried sludge is also an environmental protection problem that needs to be solved urgently. Usually, the sludge is used for the following purposes after being dried by drying equipment: it is directly mixed with raw coal for combustion and utilization, so that the coal consumption of the boiler is reduced and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/30
CPCY02W30/91
Inventor 王军仲黎明胡文成
Owner 南京鑫翔环保产业有限公司
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