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A kind of micro-nano bubble coupling fe x s System and method for absorbing flue gas

A micro-nano bubble and flue gas technology is applied in the field of wet absorption and denitrification systems, which can solve the problems of high consumption and high cost, and achieve the effects of easy operation, simple device composition and low energy consumption.

Active Publication Date: 2021-05-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the shortcomings of the advanced oxidation coupling wet absorption denitrification into an oxidant, which consumes too much and costs high in the prior art

Method used

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  • A kind of micro-nano bubble coupling fe <sub>x</sub> s System and method for absorbing flue gas
  • A kind of micro-nano bubble coupling fe <sub>x</sub> s System and method for absorbing flue gas
  • A kind of micro-nano bubble coupling fe <sub>x</sub> s System and method for absorbing flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a micro-nano bubble coupled Fe x S systems for absorbing flue gases, including: SO 2 Bottle 1, NO bottle 2, and air bottle 3 are respectively connected to the gas buffer bottle 5 through the gas flow meter 4, the gas buffer bottle 5, and the water tank 7 are respectively connected to the micro-nano bubble generator 6, and the micro-nano bubble generator 6 is connected to the reaction absorption tower 10 bottoms are connected; the reaction absorption tower 10 is provided with Fe-containing x The absorption liquid of S particle; Tail gas absorption tower 11 is connected with reaction absorption tower 10 tops, ion chromatograph 12 is connected with reaction absorption tower 10, flue gas analyzer 8 is connected between gas buffer bottle 5 and micronano bubble generator 6, The mixer 9 is installed in the reaction absorption tower 10 .

[0046] This embodiment also provides a micro-nano bubble coupled Fe x S The method of absorbing smoke, specifica...

Embodiment 2

[0053] This embodiment provides a micro-nano bubble coupled Fe x S system and method for absorbing flue gas, adding 5g of Fe with a particle size of 300-400 mesh x S particles, and adding NaCl, so that the concentration of NaCl in the absorption liquid is 0.5g / L, the pH is 5, and the rest are the same as in Example 1. NO oxidation absorption efficiency reached 95.3%, SO 2 The oxidation absorption efficiency reached 100%.

Embodiment 3

[0055] This embodiment provides a micro-nano bubble coupled Fe x S system and method for absorbing flue gas, adding 5g of Fe with a particle size of 300-400 mesh x S particles, NO concentration is 1674mg / m 3 , all the other are identical with embodiment 1. NO oxidation absorption efficiency reached 99.26%, SO 2 The oxidation absorption efficiency reached 100%.

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Abstract

The invention relates to a micro-nano bubble coupled Fe x S System and method for absorbing flue gas. The system includes: SO 2 The bottle (1), NO bottle (2), and air bottle (3) are connected to the gas buffer bottle (5) respectively, and the gas buffer bottle (5) and the water tank (7) are respectively connected to the micro-nano bubble generator (6). The nano bubble generator (6) is connected with the bottom of the reaction absorption tower (10). The method includes: NO, SO 2 The mixed gas with air is used as the gas source of micro-nano bubbles, and the configuration contains Fe x The solution of S is used as the absorption liquid, and the catalytic oxidation absorption of NO is carried out under normal temperature and pressure conditions. The catalyst used in this method is Fe in slag x S, has excellent performances such as high catalyst comprehensive utilization efficiency, simple device, high denitrification efficiency, and recyclable absorption liquid, and has good application prospects and industrialization potential in the field of environmental protection technology.

Description

technical field [0001] The invention belongs to the field of wet absorption denitrification systems and methods, in particular to a micro-nano bubble coupled Fe x S System and method for absorbing flue gas. Background technique [0002] In sintering flue gas, NO accounts for NO x 95% and hardly soluble in water and alkaline solution, SO 2 Easily soluble in water and relatively easy to remove, so NO can be oxidized to NO with an oxidizing agent 2 , NO 2 High solubility in water, easy to be absorbed, to remove NO x Effect. At present, advanced oxidation coupling wet absorption desulfurization and denitrification has become a research hotspot, that is, oxidizing NO into NO in solution 2 and absorbed in solution. Existing studies mostly use oxidants such as O 3 , ClO 2 And strong discharge produces hydroxyl radicals (OH) to oxidize NO and SO 2 , to obtain a higher removal efficiency. However, the oxidant consumption of these technologies is too large and the cost is h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/60
CPCB01D53/8637B01D2255/20738B01D2258/0283
Inventor 李登新孙红蕊张荣梁袁晓玲王雅萌杨天佑
Owner DONGHUA UNIV