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Method for manufacturing lightweight concrete product through flue gas desulfurization and denitrification based on red mud

A lightweight concrete, desulfurization and denitrification technology, applied in separation methods, air quality improvement, chemical instruments and methods, etc., can solve problems such as environmental pollution, complex components, ecological damage, etc., and achieve the effect of ensuring high-efficiency operation

Inactive Publication Date: 2018-03-06
ZHONGJING ECO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Industrial wastewater has the characteristics of many types of pollutants, complex components, high concentration of chemical oxygen demand, poor biodegradability, and high toxicity.
If it is not effectively comprehensively controlled, it will cause serious environmental pollution and ecological damage.

Method used

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  • Method for manufacturing lightweight concrete product through flue gas desulfurization and denitrification based on red mud
  • Method for manufacturing lightweight concrete product through flue gas desulfurization and denitrification based on red mud
  • Method for manufacturing lightweight concrete product through flue gas desulfurization and denitrification based on red mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] According to the formula in Table 1, mix the components uniformly to obtain the desulfurization and denitrification agent, then add alkaline waste water to make the desulfurization and denitrification agent slurry, and send it to the desulfurization tower. The flue gas (oxygen content is 18vol%) enters the desulfurization tower from the flue gas inlet of the desulfurization tower, and undergoes ozone oxidation (ozone comes from an ozone generator, and the ozone concentration of the ozone generator is 10wt%) and desulfurization and denitration agent slurry three-layer absorption spray After leaching, sulfur dioxide and nitrogen oxides are fully absorbed by the desulfurization and denitrification agent slurry. After the desulfurization and denitrification agent slurry absorbs sulfur dioxide and nitrogen oxides, it is introduced into the slurry circulation tank in the lower part of the desulfurization tower by gravity. The slurry in the upper part of the slurry circulation...

Embodiment 2

[0073] Using the desulfurization and denitrification agent formula in Table 6, the working conditions of flue gas desulfurization and denitrification are shown in Table 7 and Table 8 below. All the other conditions are the same as in Example 1. See Table 9 for the recipe. See Table 10 for performance test results.

[0074] Table 6 Formula of desulfurization and denitrification agent

[0075]

[0076] Table 7 Desulfurization and denitrification working condition parameters

[0077] serial number

project

quantity

unit

1

Flue gas volume at the inlet of desulfurization tower (working condition)

1035070

m 3 / h

2

Standard smoke volume

701064

N m 3 / h

3

Desulfurization tower inlet temperature

140

℃

4

SO2 inlet concentration

985

mg / Nm 3

5

NOx inlet concentration

415

mg / Nm 3

6

Inlet soot

100

mg / Nm 3

7

Flue gas moisture content

5.3

wt...

Embodiment 3

[0085] Table 12 and Table 13 show the formula of desulfurization and denitrification agent used in Table 11, and the working conditions of flue gas desulfurization and denitrification. All the other conditions are the same as in Example 1. See Table 14 for the recipe. See Table 15 for performance test results.

[0086] Table 11 Formula of desulfurization and denitrification agent

[0087]

[0088] Table 12 Desulfurization and denitrification working condition parameters

[0089] serial number

project

quantity

unit

1

Flue gas volume at the inlet of desulfurization tower (working condition)

1094076

m 3 / h

2

Standard smoke volume

741561

N m 3 / h

3

Desulfurization tower inlet temperature

149

℃

4

SO2 inlet concentration

968

mg / Nm 3

5

NOx inlet concentration

401

mg / Nm 3

6

Inlet soot

110

mg / Nm 3

7

Flue gas moisture content

5.8

wt% ...

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Abstract

The invention discloses a method for manufacturing a lightweight concrete product through flue gas desulfurization and denitrification based on red mud. The method comprises the following steps: (1) contacting desulfurization and denitrification agent slurry, ozone and flue gas, and removing sulfur dioxide and nitric oxides in the flue gas by a wet process so as to form desulfurization and denitrification slurry with the pH value of 6.5-7.5, wherein the desulfurization and denitrification slurry is slurry formed by adding water into the desulfurization and denitrification agent, and the desulfurization and denitrification agent comprises 60-100 weight parts of red mud, 5-30 parts of magnesium oxide and 5-20 parts of sodium hydroxide; (2) mixing the desulfurization and denitrification slurry, magnesium oxide, lightweight aggregate, mineral admixture and additives to form mixed materials; and (3) pouring, molding and curing the mixed materials, thereby obtaining the lightweight concreteproduct. According to the method disclosed by the invention, the industrial wastes can be effectively utilized on the basis of flue gas desulfurization and denitrification.

Description

technical field [0001] The invention relates to a method for manufacturing lightweight concrete products, in particular to a method for directly using red mud desulfurization and denitrification slurry to manufacture lightweight concrete products. Background technique [0002] With the introduction of the policy of restricting the use of clay bricks and encouraging the use of new wall materials, new wall materials have developed rapidly. Due to the light weight, heat preservation, earthquake resistance, fire prevention, sound absorption, sound insulation and other properties of lightweight concrete products, and convenient construction, it has been widely used in my country in recent years and has attracted great attention. [0003] The Chinese patent application with the application number 201410686889.3 discloses a production method of ready-mixed lightweight aggregate concrete insulation material, which is to mix spherical lightweight aggregate, fine aggregate, cement, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/30C04B18/06B01D53/60B01D53/80C04B111/40
CPCB01D53/60B01D53/80B01D2251/304B01D2251/402B01D2251/404B01D2251/602B01D2251/604B01D2258/0283C04B18/062C04B28/30C04B2111/40C04B2201/20C04B2201/50C04B14/304C04B18/142C04B18/08C04B18/027C04B2103/302Y02A50/20Y02W30/91
Inventor 童裳慧
Owner ZHONGJING ECO IND CO LTD