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Method for preparing sintering-free cement from municipal solid waste and product

A municipal solid waste, sintering-free technology is applied in the research and development of the harmless disposal and resource utilization of solid hazardous waste, which can solve the problem of the inability to efficiently solve the heavy metal pollution of municipal solid waste incineration fly ash, reduce the quality of cement products, and affect disposal. effect and other problems, to achieve the effect of wide source of raw materials, stabilization, and simple preparation process

Active Publication Date: 2020-06-26
浙江中陶环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In general, the application of cement kiln co-processing technology to dispose of municipal solid waste incineration fly ash cannot effectively solve the problem of heavy metal pollution in municipal solid waste incineration fly ash, and the disposal process also has strict requirements on the amount of municipal solid waste incineration fly ash to avoid Disposal effects and quality of cement products are affected due to excessive fly ash content
At the same time, the co-processing of municipal solid waste incineration fly ash in cement kiln is inseparable from high temperature environment (higher than 1000 ℃), and the energy consumption of disposal is high.

Method used

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  • Method for preparing sintering-free cement from municipal solid waste and product
  • Method for preparing sintering-free cement from municipal solid waste and product
  • Method for preparing sintering-free cement from municipal solid waste and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Influence of the mass ratio of aluminum ash, diatomite, and municipal solid waste incineration fly ash on the leaching value of pollutants and strength properties in the prepared non-sintering cement

[0027] According to the mass ratio of aluminum ash, diatomaceous earth, and municipal solid waste incineration fly ash 2.5:15:100, 3.5:15:100, 4.5:15:100, 5:10:100, 5:12:100, 5:14: 100, 5:15:100, 5:20:100, 5:25:100, 7.5:15:100, 7.5:20:100, 7.5:25:100, 10:15:100, 10:20:100, 10:25:100, 10.5:25:100, 11.5:25:100, 12.5:25:100, 10:26:100, 10:28:100, 10:30:100 weigh aluminum ash and diatomaceous earth respectively , municipal solid waste incineration fly ash, mixed to get 21 groups of modified fly ash. According to the mass ratio of sodium phosphate and modified fly ash of 2.5:100, sodium phosphate and modified fly ash were weighed and mixed to obtain 21 groups of alkali-mixed modified fly ash. According to the liquid-solid ratio of 1:1mL / mg, water and alkali-modifie...

Embodiment 2

[0036] Example 2 Effect of the mass ratio of sodium phosphate and modified fly ash on the leaching value of pollutants and strength properties in the prepared non-sintering cement

[0037] According to the mass ratio of aluminum ash, diatomaceous earth, and municipal solid waste incineration fly ash of 10:25:100, aluminum ash, diatom earth, municipal solid waste incineration fly ash were weighed respectively, and mixed to obtain modified fly ash. Weigh sodium phosphate according to the mass ratio of sodium phosphate and modified fly ash 1:100, 1.5:100, 2:100, 2.5:100, 5:100, 7.5:100, 8:100, 8.5:100, 9:100 and modified fly ash are mixed to obtain nine groups of alkali-mixed modified fly ash. According to the liquid-solid ratio of 1.5:1mL / mg, water and alkali-mixed modified fly ash were weighed respectively, stirred at 75 rpm, and irradiated with low-temperature plasma for 1 hour to obtain nine groups of non-burning cement slurries. The action voltage is 15KV, and the action at...

Embodiment 3

[0043] Example 3 Influence of the applied voltage of low-temperature plasma irradiation on the leaching value and strength properties of pollutants in the prepared non-sintering cement

[0044] According to the mass ratio of aluminum ash, diatomaceous earth, and municipal solid waste incineration fly ash of 10:25:100, aluminum ash, diatom earth, municipal solid waste incineration fly ash were weighed respectively, and mixed to obtain modified fly ash. According to the mass ratio of sodium phosphate and modified fly ash of 7.5:100, sodium phosphate and modified fly ash were weighed and mixed to obtain alkali-doped modified fly ash. According to the liquid-solid ratio of 2:1mL / mg, nine groups of water and nine groups of alkali-doped modified fly ash were weighed, stirred at 120rpm, and irradiated with low-temperature plasma for 1.5 hours, wherein the applied voltages of low-temperature plasma were respectively 2.5KV, 3.5KV, 4.5KV, 5KV, 15KV, 25KV, 25.5KV, 26.5KV, 27.5KV, the wor...

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Abstract

The invention discloses a method for preparing sintering-free cement from municipal solid waste, which comprises the following steps: respectively weighing aluminum ash, diatomite and municipal solidwaste incineration fly ash, and mixing to obtain modified fly ash; respectively weighing sodium phosphate and the modified fly ash, and mixing to obtain alkali-doped modified fly ash; respectively weighing water and the alkali-doped modified fly ash, stirring, Meanwhile, carrying out low-temperature plasma irradiation, so as to obtain water-boiling-free mud slurry; and drying, grinding and sievingthe water-boiling-free mud to obtain the sintering-free cement prepared from the municipal solid waste. The invention also discloses the sintering-free cement prepared by the method. The minimum leaching values of Zn and Pb of the prepared sintering-free cement are far lower than the limit values of inorganic pollutants Zn and Pb in the Holland building material standard, and the content of dioxin is far lower than the limit values in the Household Refuse Landfill Pollution Control Standard (GB16889-2008).

Description

technical field [0001] The invention relates to the field of research and development of harmless disposal of solid hazardous waste and resource utilization, in particular to a method and product for preparing non-sintering cement by utilizing urban domestic waste. Background technique [0002] Municipal solid waste incineration fly ash refers to the polluted dust produced in the process of municipal solid waste incineration and collected through the flue gas treatment system. The fly ash collected by large domestic waste incineration plants is usually a mixed incineration fly ash in which the washing reaction ash and the bag filter fly ash are mixed together. Municipal solid waste incineration fly ash is a hazardous solid waste. The heavy metals and dioxin pollutants contained in it have teratogenic, carcinogenic and mutagenic properties. Improper disposal will easily bring irreversible harm to surrounding residents and the ecological environment. Therefore, municipal soli...

Claims

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Application Information

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IPC IPC(8): C04B12/00
CPCC04B12/00
Inventor 黄涛徐娇娇刘万辉刘龙飞宋东平金俊勋周璐璐张树文
Owner 浙江中陶环保科技集团有限公司
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