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Method for preparing foam ceramic by using industrial and mining, building and sludge residue as raw materials

A technology of foam ceramics and sludge, which is applied in the production of ceramic products, ceramic materials, clay products, etc., can solve the hidden dangers of secondary pollution, waste of urban resources, resource depletion and other problems, achieve high compressive strength, improve efficiency, reduce The effect of urban energy consumption

Pending Publication Date: 2018-04-10
FUJIAN FUYONGDE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Less than 1% of the land area has to carry more than 54% of the population load and output about 84% of GDP. This kind of extensive urbanization will affect the healthy development of cities, resulting in the waste and exhaustion of urban resources.
The existing incineration equipment disposes 270,000 tons per day, and the annual disposal fee is as high as 2.4 billion yuan. The use of incineration to generate electricity only solves some urban construction solid waste, and does not solve the problem of construction solid waste and sewage sludge at low cost and efficiently. , while sludge incineration power generation needs to dehydrate and squeeze the sludge to a water content of 67.7%, then the combustion will be in thermal equilibrium, so the cost of drying and burning remains high; and solid hazardous waste will contain secondary wastes such as heavy metals and dioxins. Pollution hazards, so further treatment is required to solve these pollution sources, so there is no fundamental solution to the problem. Only high-temperature melting and incineration technology can permanently solidify heavy metals, pyrolysis dioxins and other organic pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing foamed ceramics from industrial and mining, construction, and sludge waste residues. The method includes the following steps:

[0026] a. Preparation of protein foaming agent: transport the sludge with a moisture content of 80% to the long-tube tunnel hydrothermal wall breaking machine, and add 2% potassium ferrate, and pass the sludge under the temperature control condition of 70°C. The long-tube tunnel hydrothermal wall breaking machine is left to stand for 30 minutes to pyrolyze and break the wall. After pyrolysis and breaking the wall, the protein wrapped in the cell wall of the organic matter in the sludge is collected, and then the polypeptide protein liquid foaming agent with high surface activity is obtained through solid-liquid separation. , the remaining sludge filter cake is collected for use;

[0027] b. Preparation of foam slurry: put industrial and mining, construction, and sludge waste into a horizontal ball...

Embodiment 2

[0032] This embodiment provides a method for preparing foamed ceramics from industrial and mining, construction, and sludge waste residues. The method includes the following steps:

[0033] a. Preparation of protein foaming agent: transport the sludge with a moisture content of 90% to the long-tube tunnel hydrothermal wall breaking machine, and add 6% potassium ferrate, and pass the sludge under the temperature control condition of 75°C The long-tube tunnel hydrothermal wall breaking machine was left standing for 45 minutes to pyrolyze and break the wall. After pyrolysis and breaking the wall, the protein wrapped in the cell wall of the organic matter in the sludge was collected, and then the polypeptide protein liquid foaming agent with high surface activity was obtained through solid-liquid separation. , the remaining sludge filter cake is collected for use;

[0034] b. Preparation of foam slurry: put industrial and mining, construction, and sludge waste into a horizontal ba...

Embodiment 3

[0039] This embodiment provides a method for preparing foamed ceramics from industrial and mining, construction, and sludge waste residues. The method includes the following steps:

[0040] a. Preparation of protein foaming agent: transport the sludge with a moisture content of 95% to the long-tube tunnel hydrothermal wall breaking machine, and add 10% of potassium ferrate, and pass the sludge under the temperature control condition of 80°C. The long-tube tunnel hydrothermal wall breaking machine was left standing for 60 minutes to pyrolyze and break the wall. After pyrolysis and breaking the wall, the protein wrapped in the cell wall of the organic matter in the sludge was collected, and then the polypeptide protein liquid foaming agent with high surface activity was obtained through solid-liquid separation. , the remaining sludge filter cake is collected for use;

[0041] b. Preparation of foam slurry: put industrial and mining, construction, and sludge waste into a horizont...

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Abstract

The invention particularly relates to a method for preparing a foam ceramic by using industrial and mining, building and sludge residue as raw materials, and belongs to the technical field of environmental-protection foam ceramics, wherein protein foaming agent preparing, foam slurry preparing, molding and curing, high-temperature sintering, and detecting and packaging are performed to prepare thefoam ceramic. According to the present invention, the molded and cured foam slurry is conveyed to the tunnel kiln using liquefied petroleum gas as the fuel, and then enters the high temperature section through the sintering device, such that the two composite heating modes are innovatively connected in series so as to save the energy consumption or the fuel cost by 15-30%, and the technical problem that heavy metals, dioxins, and other organic pollutants cannot be completely removed during the combustion of industrial and mining, building and sludge residue is fundamentally solved; and the foam ceramic prepared through the method is the novel building material, and can have excellent performances of hydrophobicity, fire resistance, sound resistance, heat insulation, high compressive strength, acid resistance, alkali resistance, no aging, less deformation and the like according to the opened and closed gaps of the foam.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly foam ceramics, and in particular relates to a method for preparing foam ceramics by using industrial and mining, construction and sludge waste residues as raw materials. Background technique [0002] At present, my country is undergoing a process of rapid urbanization. Domestic urban construction produces more than 2.4 billion tons of solid waste every year, 200,000 to 300,000 tons of sewage sludge is generated every day, and the waste biomass of urban green plants is on the order of one million tons or more. Optimizing the utilization of urban waste is the direction of sustainable development in my country in the future. Less than 1% of the land area has to carry more than 54% of the population load and output about 84% of GDP. This kind of extensive urbanization will affect the healthy development of cities, resulting in the waste and exhaustion of urban resources. The existing inci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B33/132C04B33/32
CPCC04B33/1321C04B33/1324C04B33/32C04B38/10C04B2235/3463C04B2235/656C04B2235/6562C04B2235/6567C04B2235/661C04B2235/667Y02P40/60
Inventor 俞晨辉
Owner FUJIAN FUYONGDE ENVIRONMENTAL TECH CO LTD
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