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Method for disposal of solid waste by ceramsite kiln and ceramsite kiln for disposal of solid waste

A technology of solid waste and ceramsite, applied in the field of ceramsite kiln, can solve the problems of hidden pollution and cost, and achieve the effect of near-zero emission reduction, overcoming high cost and widening the usable range.

Inactive Publication Date: 2019-10-22
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for disposing of solid waste using a ceramsite kiln and a ceramsite kiln for disposing of solid waste. The technical problem to be solved is to use fly ash and organic solid waste as raw materials for ceramsite. During the manufacturing process of ceramsite, the fly ash and organic solid waste are absorbed, on the one hand, it solves the hidden danger of pollution caused by fly ash and organic solid waste, and at the same time, it solves the cost problem caused by the limitation of ceramsite raw materials, which has a good ecological environment Benefits, social benefits and economic benefits have both, so it is more suitable for practical use

Method used

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  • Method for disposal of solid waste by ceramsite kiln and ceramsite kiln for disposal of solid waste
  • Method for disposal of solid waste by ceramsite kiln and ceramsite kiln for disposal of solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] 60% of shale, 30% of waste incineration fly ash, and 10% of auxiliary raw materials are pre-crushed and sent to the small silo respectively. A spiral metering device is installed under the silo, and the parameters of SiO are prepared according to the ceramsite raw material. 2 53wt%, Al 2 o 3 20wt%, Fe 2 o 3 5wt%, CaO 3wt%, MgO 1wt%, Na 2 O+K 2 O 2wt%, SO 3 0.5% for batching parameters to measure the amount of material, and then uniformly transported to the ceramsite raw material mixing ball mill device, through the impact, extrusion and grinding of the ball milling medium, the material is fully mixed and the passing rate of the square hole sieve with a fineness of 0.045mm is greater than 95%, then the mixed material falls from the outlet of the ball mill to the conveyor belt, and is sent to the ceramsite granulation device. In the ceramsite billet granulation device, the mixed material is mixed with the water at the outlet of the spray device to form a mixed m...

Embodiment 2

[0082] With embodiment 1, wherein change point is that ceramsite raw material preparation parameter is SiO 2 46wt%, Al 2 o 3 25wt%, Fe 2 o 3 5wt%, CaO 3wt%, MgO 1.5wt%, Na 2 O+K 2O 4wt%, SO 3 2.5%; the catalyst in the SCR device is V loaded with precious metal Pd 2 o 5 -WO 3 / TiO 2 ; The porous material for flue gas injection at the kiln tail is porous γ-Al 2 o 3 ; Deacidification unit contains 15wt% Ca(OH) 2 solution.

[0083] After testing, the performance indicators of ceramsite are as follows:

[0084] The results of ceramsite heavy metal leaching value (unit mg / L) are, Cu 0.009, Ni 0.006, As 0.008, Pb 0.004, Cr 0.002, Ge 0.0007, Hg content is lower than the instrument detection limit; Dioxin content (0.016ngI-TEQ / Nm 3 ), meeting the secondary standard requirements of GB16889-2008 "Pollution Control Standards for Domestic Garbage Landfill Sites" and GB15618-2008 "Soil Environmental Quality Standards" (draft for comments). The physical properties of cer...

Embodiment 3

[0086] With embodiment 1, wherein change point is that ceramsite raw material preparation parameter is SiO 2 62wt%, Al 2 o 3 16wt%, Fe 2 o 3 8wt%, CaO 2wt%, MgO 1.5wt%, Na 2 O+K 2 O 3wt%, SO 3 1.5%; the catalyst in the SCR device is V loaded with bimetallic complexes 2 o 5 -WO 3 / TiO 2 ; The porous material for kiln tail flue gas injection is active boron nitride; the deacidification device contains 20wt% Mg(OH) 2 solution.

[0087] After testing, the performance indicators of ceramsite are as follows: ceramsite heavy metal leaching value (unit mg / L) results are, Cu 0.005, Ni 0.001, As 0.008, Pb 0.001, Cr 0.001, Ge 0.0005, Hg content is lower than the detection limit of the instrument ; Dioxin content (0.012ng I-TEQ / Nm 3 ), meeting the secondary standard requirements of GB16889-2008 "Pollution Control Standards for Domestic Garbage Landfill Sites" and GB15618-2008 "Soil Environmental Quality Standards" (draft for comments). The physical properties of ceramsite a...

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Abstract

The invention provides a method for disposal of solid waste by a ceramsite kiln and a ceramsite kiln for disposal of solid waste. The ceramsite kiln includes a drying kiln and a calcination rotary kiln. The method includes: preparing ceramsite raw materials, which include solid waste; drying and calcining ceramsite, and enabling circulation flow of the generated flue gas along the drying kiln-calcination rotary kiln-drying kiln; cooling and discharging ceramsite; and disposing flue gas and tail gas. Specifically, the solid waste includes at least one of fly ash or organic solid waste; fly ashis selected from the incineration ash of at least one of domestic garbage, industrial waste or medical waste; the organic solid waste is selected from at least one of polluted soil, oily sludge, sludge obtained by chemical plant sewage treatment, medical solid waste or industrial waste residue. The method adopts fly ash and organic solid waste as the ceramsite raw materials, consumes fly ash and organic solid waste in the ceramsite manufacturing process, not only solves the hidden trouble of pollution caused by fly ash and organic solid waste, but also solves the cost problem caused by the limitation of ceramsite raw materials.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste and the field of environmental protection, and in particular relates to a method for disposing of solid waste by using a ceramsite kiln and a ceramsite kiln for disposing of solid waste. Background technique [0002] Land resources and water sources are the material basis for human survival and an important part of maintaining the ecological environment. With the development of industrial, agricultural, commercial and medical industries and the acceleration of urbanization, the amount of fly ash and organic solid waste is increasing year by year. If they are not properly disposed of or utilized, they will undoubtedly cause pollution hazards. Both fly ash and organic solid waste are hazardous waste listed in the National Hazardous Waste List. They cannot be fundamentally solved by traditional disposal methods such as stockpiling and landfilling. In recent years, new disposal met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/138C04B38/00F23G7/06F23G5/20F27B17/00F27D17/00F26B21/00B01D53/86B01D53/56B01D53/76B01D53/72B01D53/78B01D53/40B01D46/02
CPCB01D46/02B01D53/40B01D53/72B01D53/76B01D53/78B01D53/8625C04B33/1324C04B33/1355C04B33/138C04B38/009C04B2235/3201C04B2235/3217C04B2235/3232C04B2235/3272C04B2235/3409C04B2235/3427C04B2235/3826C04B2235/422C04B2235/445C04B2235/656C04B2235/6565C04B2235/6567F23G5/20F23G7/06F26B21/00F27B17/00F27D17/004Y02P10/25Y02P40/60Y02P70/10
Inventor 刘姚君康艳文刘晶汪澜
Owner CHINA BUILDING MATERIALS ACAD
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