Method for producing building material by utilizing desulfurization and denitrification byproducts

A technology for desulfurization and denitrification and building materials, applied in the direction of separation methods, chemical instruments and methods, applications, etc., can solve the problems of high production cost, high energy consumption, unsuitable for industrial application, etc., and achieve the effect of high-efficiency desulfurization and denitrification

Inactive Publication Date: 2021-11-19
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complex in process, requires multiple steps of filtration, evaporation and concentration, and vacuum distillation, which consumes a lot of energy and has high production costs, and is not suitable for industrial applications.

Method used

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  • Method for producing building material by utilizing desulfurization and denitrification byproducts
  • Method for producing building material by utilizing desulfurization and denitrification byproducts
  • Method for producing building material by utilizing desulfurization and denitrification byproducts

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1～9 and comparative preparation example 1～4

[0100] S1. according to the ratio of raw materials shown in table 2, take the raw materials and transport them to the kneader, dry mix for 10min, to obtain the first mixture; add deionized water three times in the first mixture (the volume ratio of the amount of water added to the raw materials is 0.12:1), wet mixing for 30min to obtain the second mixture.

[0101] S2. Transporting the second mixture to a granulator for granulation to obtain cylindrical granules to be dried (5-10 mm in diameter and 8-15 mm in length).

[0102] S3. Put the particles to be dried in an oven and dry them for 2 hours (the drying temperature is shown in Table 2) to obtain a desulfurization and denitrification absorbent.

[0103] S4. Place the desulfurization and denitration absorbent in an atmosphere containing sulfur oxides and nitrogen oxides to perform desulfurization and denitrification to obtain a used desulfurization and denitration absorbent. At the same time, the performance of the desulfur...

Embodiment 1～4 and comparative example 1～3

[0110] According to the ratio of raw materials shown in Table 4, desulfurization and denitrification by-products were weighed respectively (the used desulfurization and denitration absorbent of Preparation Example 1 was ground to 100-200 mesh), ore powder, fly ash, steel slag, silica fume and Alkali activator (sodium hydroxide), the above raw materials are transported to a horizontal ribbon mixer, and mixed evenly to obtain a gelled material.

[0111] Add water to the cementitious materials of Examples 1-4 and Comparative Examples 1-3 respectively and mix them in proportion, then pour them into a formwork of 40mm×40mm×160mm, and perform performance according to "GB175-2007 General Portland Cement" after molding The test results are shown in Table 5.

[0112] Table 4

[0113]

[0114] table 5

[0115]

[0116] It can be seen from Table 5 that the strength of the cementitious material produced in Examples 1-4 can reach the standard of grade 42.5 of ordinary Portland ceme...

Embodiment 5～6

[0118] First, grind the used desulfurization and denitrification absorbents of Preparation Example 1 and Preparation Example 4 (prepared according to the proportions shown in Preparation Example 1 and Preparation Example 4) to 100-200 mesh, and use them as the Desulfurization and denitrification by-products. Then follow the steps below to produce permeable bricks:

[0119]S1. According to the ratio of raw materials shown in Table 6, weigh desulfurization and denitrification by-products, mineral powder, fly ash, steel slag, silica fume, alkali activator (sodium hydroxide), coarse aggregate, fine aggregate, and transport Put it into the base material screw mixer for dry mixing, after mixing evenly, spray an appropriate amount of water to produce a semi-dry base material;

[0120] According to the ratio of raw materials shown in Table 7, desulfurization and denitrification by-products, mineral powder, fly ash, steel slag, silica fume, alkali activator (sodium hydroxide) and fine...

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Abstract

The invention discloses a method for producing a building material by using desulfurization and denitrification byproducts. The method comprises the following steps of: S1, mixing raw materials including 4-16 parts by weight of iron powder, 1-14 parts by weight of bentonite, 2-20 parts by weight of cement, 20-70 parts by weight of lime powder, 2-14 parts by weight of manganese ore, 4-10 parts by weight of cerium ore, 2-15 parts by weight of cobalt ore and 2-15 parts by weight of a pore forming agent, granulating the mixture, and performing drying to obtain a desulfurization and denitrification absorbent; S2, placing the desulfurization and denitrification absorbent in a flue gas environment for desulfurization and denitrification, so as to obtain desulfurization and denitrification byproducts. and S3, producing the building material by using the desulfurization and denitrification byproducts. The method not only can effectively perform desulfurization and denitrification, but also can realize resource reutilization of the desulfurization and denitrification byproducts.

Description

technical field [0001] The invention relates to a method for producing building materials by utilizing desulfurization and denitrification by-products. Background technique [0002] With the widespread promotion of desulfurization and denitrification technology, the problem of treatment and reuse of by-products of flue gas desulfurization and denitrification has gradually become prominent. At present, the utilization rate of desulfurization and denitrification by-products is generally low, and a large number of desulfurization and denitrification by-products are piled up or discarded, which not only occupies land, wastes resources, but also easily causes secondary pollution. Therefore, it is urgent to develop a method for rationally utilizing desulfurization and denitrification by-products to reduce secondary pollution, protect the environment, and realize resource utilization of waste. [0003] CN108726940A discloses a method for preparing desulfurized ash concrete. Coarse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/10C04B38/02C04B38/10B01D53/81B01D53/48B01D53/56C04B18/02
CPCC04B28/00C04B28/10B01D53/81B01D53/48B01D53/56C04B18/021C04B2111/00017C04B2201/50C04B14/34C04B14/104C04B7/00C04B18/12C04B24/00C04B22/02C04B24/126C04B22/10C04B24/38C04B24/001C04B20/0048C04B24/06C04B24/32C04B24/2641C04B38/02C04B38/10C04B18/08C04B18/142C04B18/146C04B18/0409C04B22/062C04B22/064Y02W30/91
Inventor 王春霞张焜魏闯
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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