Unlock instant, AI-driven research and patent intelligence for your innovation.

Adsorption tower used for removing arsenic from flue gases and arsenic removing method thereof

An adsorption tower and flue gas technology, applied in the field of flue gas pollution removal, can solve the problem of limited effect of flue gas removal of arsenic, and achieve the effects of prolonging residence time, long reaction time and improving adsorption effect.

Active Publication Date: 2018-04-10
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to overcome the problem that there is no special adsorption tower for flue gas arsenic removal in the prior art, resulting in limited effect of flue gas arsenic removal, and to provide an adsorption tower for flue gas arsenic removal and a method for removing arsenic , the calcium oxide, metallurgical slag, zeolite and fly ash were mixed uniformly to prepare the adsorbent mixture, and then the adsorbent mixture was added to the cylinder mixer to prepare the adsorbent particles, and the calcium oxide, metallurgical slag The combination of , zeolite and fly ash makes the adsorbent combine chemical adsorption and physical adsorption, greatly improving the adsorption effect of the adsorbent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adsorption tower used for removing arsenic from flue gases and arsenic removing method thereof
  • Adsorption tower used for removing arsenic from flue gases and arsenic removing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An adsorbent for flue gas dearsenization of the present invention includes calcium oxide, metallurgical slag, zeolite and fly ash. The addition of fly ash is M4=γ(M1+αM2-δM3)-β / (1-α)M2, wherein: M1 is the quality of calcium oxide, M2 is the quality of metallurgical slag, and M3 is the quality of zeolite; Take 0.15~0.25, δ takes 1.5-2, where it is worth noting that: α is the mass percentage of CaO and MgO in metallurgical slag; β is the content of Fe in metallurgical slag 2 o 3 and MnO mass percent content. The mass ratio of calcium oxide to zeolite is 4-8, and 5 is used in this embodiment.

[0034]Calcium oxide 60kg of the present embodiment, metallurgical slag 20kg, zeolite 12kg; Calculate the quality of fly ash to be: M4=γ(60+α20-δ12)-β / (1-α)20=8.14kg wherein γ gets 0.2 , δ is taken as 1.5, the fly ash has a larger specific surface area, and the fly ash and zeolite have a better adsorption effect on arsenic, so that the residence time of arsenic and its oxides on t...

Embodiment 2

[0059] The basic content of this embodiment is the same as that of the embodiment, except that it also includes additives, and the additives include blast furnace ash, chrome slag and mullite; each component is composed according to the following parts by mass: blast furnace ash: 60%, chromium Slag: 20%, mullite: 20%. The additive is added in an external manner, and the amount of the additive is 1-2% of the adsorbent, which is 1% in this embodiment, that is, the amount of the additive is 1% of the sum of the mass of calcium oxide, metallurgical slag, zeolite and fly ash. -2%. Under high temperature conditions, the metal elements in the additives promote the electron shift in fly ash and converter slag under high temperature conditions, thereby promoting the arsenic in the flue gas to enter the vacancies and bridges of O in calcium oxide, improving In addition, the metal in the additive promotes the arsenic in the fly ash to enter the vitreous aluminosilicate mineral lattice, ...

Embodiment 3

[0073] The basic content of this embodiment is the same as that of Embodiment 1, and an accelerator is also included, and the accelerator is an organic substance with an aspect ratio greater than 1000. The accelerator in this embodiment is plant fiber or animal hair fiber or plastic fiber, and the accelerator is added in an external manner. The addition amount of calcium oxide, metallurgical slag, zeolite and fly ash quality sum 0.05-0.2%; What present embodiment adopts is the mixture of animal hair fiber and cotton fiber, and the ratio of the quality of hair fiber and cotton fiber is 2 : 1; by adding hair fiber and cotton fiber in the adsorbent, larger mesopores can be distributed in the adsorption after treatment, which greatly improves the adsorption specific surface area of ​​the adsorbent, and can improve the adsorption effect of the adsorbent; in addition, The pores are connected to each other, thereby promoting the transformation from physical adsorption to chemical ads...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an adsorption tower used for removing arsenic from flue gases and an arsenic removing method thereof, and belongs to the technical field of removal of arsenic from the flue gases. An adsorption tower body is provided with a flow stabilizing layer, an activated carbon adsorption layer and an adsorbent material layer in sequence from bottom to top, the adsorbent material layer is arranged at one side far away from an air inlet, and adsorbents of the adsorbent material layer include calcium oxide, metallurgical slag, zeolite and fly ash; microwave heating components are arranged at the upper parts of the outer side of the adsorption tower body, and resistor heating components are arranged at the lower parts of the outer side of the adsorption tower body; and a heatinggap is arranged between each microwave heating component and the corresponding resistor heating component. According to the tower provided by the invention, pre-adsorption is performed through the activated carbon adsorption layer, a part of arsenic and other impurities in the flue gases can be adsorbed, and the adsorbent material layer can fully and specially adsorb the arsenic in the flue gases, promotes the reaction process of the calcium oxide and the arsenic, and improves the adsorption effects of the arsenic by the adsorbents.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollution removal, and specifically relates to an adsorption tower and arsenic removal method for flue gas arsenic removal. Background technique [0002] A large amount of SO in the flue gas 2 , NO x Due to the huge amount of emissions and high concentration of pollutants such as pollutants, people have carried out related research work on them very early and made remarkable achievements. With the increasing pressure of environmental protection, researchers have found that the trace elements enriched in the flue gas will also cause great harm to the human body and the environment after entering the atmosphere, mainly because the trace elements are precipitated and migrated. It is easy to accumulate on the surface of micron and submicron particles, form a sol in the atmosphere and suspend it for a long time, enter the human lungs and cause severe respiratory diseases. [0003] Among them, arsen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/46B01D53/75B01J20/16B01J20/30
CPCB01D53/02B01D53/46B01D53/81B01D2251/404B01D2253/102B01D2258/0283B01J20/02B01J20/041B01J20/165
Inventor 王海军凌海涛常立忠彭世恒施晓芳周俐王建军
Owner ANHUI UNIVERSITY OF TECHNOLOGY