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Foamed concrete carbon sequestration method

A technology of foamed concrete and carbon sequestration, applied in the field of foamed concrete, can solve the problems of high energy consumption, high cost of carbon sequestration of foamed concrete bricks, complicated process and process, etc.

Pending Publication Date: 2021-10-08
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CO produced by the US liquefaction industry 2 technology incorporated into concrete slurries, due to liquefied CO 2 The energy consumption is high, and its process and process are complicated, and the cost of carbon fixation of the foamed concrete bricks manufactured is extremely high

Method used

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Examples

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Effect test

Embodiment 1

[0033] A method for sequestering carbon in foamed concrete, comprising the following steps:

[0034] Step S1: Pulverize 23kg of boiler slag from steelworks, 10kg of ash collected by dust collector, 6kg of fly ash, 4kg of desulfurized gypsum and mix with 3kg of cement, add 41kg of mixed raw materials and 100kg of hot water at 40°C into a mixer and stir Obtain hot slurry, in which hot water is obtained by heating steam or flue gas waste heat generated during the power generation process of the thermal power unit or the steelmaking process of the steelmaking plant, which can effectively realize the utilization of heat energy and reduce the cost of energy consumption. Utilize boiler slag, fly ash, dedusting solid waste, desulfurized gypsum, and solid waste to greatly reduce the cost of raw materials for foamed concrete bricks, and realize the recycling and harmless utilization of solid waste;

[0035] Step S2: Into the hot slurry in the mixer, feed the clean flue gas, wherein the ...

Embodiment 2

[0040] A method for sequestering carbon in foamed concrete, comprising the following steps:

[0041] Step S1: Mix 45kg, boiler slag in the thermal power unit, 20kg of ash collected by the dust collector, 11kg of fly ash, 8kg of desulfurized gypsum with 8kg of cement, and add 53kg of mixed raw materials and 100kg of hot water at 80°C to the mixer Stir to obtain hot slurry, in which hot water is obtained by heating steam or flue gas waste heat generated during the power generation process of the thermal power unit or the steelmaking process of the steelmaking plant;

[0042]Step S2: pass into the clean flue gas in the hot slurry in the mixer, wherein the concentration of the clean flue gas in the mixer is 35%, so that the CO in the clean flue gas 2 Reacting with hot slurry, the net flue gas is obtained from at least a part of the flue gas produced in the power plant boiler of the thermal power unit or the blast furnace of the steelmaking plant after desulfurization, denitrificat...

Embodiment 3

[0047] A kind of foam concrete carbon sequestration method, comprises following process:

[0048] Step S1: Mix 15kg of calcium carbide furnace slag, 30kg of boiler slag in a thermal power unit, 26kg of ash collected by a dust collector, and 8kg of desulfurized gypsum with 8kg of cement, and add 50kg of mixed raw materials and 100kg of hot water at 75°C to the mixer Stir to obtain hot slurry, in which hot water is obtained by heating steam or flue gas waste heat generated during the power generation process of the thermal power unit or the steelmaking process of the steelmaking plant;

[0049] Step S2: pass into the clean flue gas in the hot slurry in the mixer, wherein the concentration of the clean flue gas in the mixer is 35%, so that the CO in the clean flue gas 2 Reacting with hot slurry, the net flue gas is obtained from at least a part of the flue gas produced in the power plant boiler of the thermal power unit or the blast furnace of the steelmaking plant after desulfur...

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Abstract

The invention provides a foamed concrete carbon sequestration method which comprises the following steps of: mixing crushed solid wastes with cement, and stirring the mixed raw materials and hot water to obtain hot slurry; introducing treated clean flue gas generated by a boiler into the hot slurry to enable CO2 in the clean flue gas to react with the hot slurry and complete a cement foaming process; injecting the foamed slurry into a shaping mold for foaming and solidification; feeding the foamed brick obtained after solidification into a carbonation curing chamber, and introducing clean flue gas into the carbonation curing chamber to enable CO2 in the clean flue gas to conduct carbonation curing on the foamed brick; and carrying out autoclaved curing and drying on the foamed brick subjected to carbonation curing by utilizing steam generated by the boiler or steam extracted by a steam turbine. Clean flue gas discharged by a boiler is directly introduced into concrete slurry, aeration and bubble reaction are utilized, and then a hardening reaction is performed for a certain time, so that the foamed concrete brick for directly fixing flue gas and CO2 is formed, and capture, storage and utilization of CO2 in the flue gas are realized at low cost.

Description

technical field [0001] The present application relates to the technical field of foamed concrete, in particular to a method for sequestering carbon in foamed concrete. Background technique [0002] Construction industry production is one of the main sources of greenhouse gas emissions, and its carbon emissions account for about 30%-40% of the country's carbon emissions. With the stable development of the economy, there is still room for growth in the carbon emissions of the construction industry, or become The main growth source of carbon emissions in my country. Therefore, reducing carbon emissions from building materials production and building construction operations will become the main focus of responding to climate change. Strengthening the promotion and application of low-carbon and negative-carbon technologies in buildings will become a key factor in mitigating carbon emissions. Pressure and new ways to address climate issues. [0003] With the intensification of envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/10C04B38/02B28B11/24C04B111/40
CPCC04B28/00C04B38/103C04B38/02B28B11/245C04B2111/40C04B2111/00017C04B18/10C04B18/08C04B14/365C04B22/002
Inventor 杨豫森张帅彭烁黄永琪
Owner HUANENG CLEAN ENERGY RES INST
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