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Catalyst and preparation method, flue gas CO removal-whitening system and method

A catalyst and flue gas technology, used in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Problems such as poor white effect

Active Publication Date: 2021-07-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Before the flue gas is discharged, it usually goes through a series of purification procedures, such as desulfurization, denitrification, etc., but there is still a considerable amount of CO at the end of the flue gas. If the CO is directly discharged into the atmosphere without treatment, it will not only pollute the environment, It's also a waste of energy
At the same time, the current flue gas discharge temperature is high, which not only causes a lot of waste of heat energy, but also contains a large amount of water vapor in the flue gas, which will form white feathers when it is directly discharged at low altitude, which not only seriously affects the nearby residential residents, but also causes another cause of smog (forms aerosol)
At present, flue gas whitening is a relatively novel treatment process for large-scale concentrated industrial flue gas treatment, but the existing flue gas treatment has a low treatment efficiency for flue gas whitening, and flue gas dewatering and whitening The effect is often not good, and most of the prior art is to improve one of the above-mentioned problems, lacking a related whole system

Method used

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  • Catalyst and preparation method, flue gas CO removal-whitening system and method
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  • Catalyst and preparation method, flue gas CO removal-whitening system and method

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preparation example Construction

[0034] In order to solve the problem that there is still a considerable amount of CO at the end of the flue gas in the prior art, and the flue gas also contains a large amount of water vapor, and the problem of white feathers will be formed when the flue gas is directly discharged at low altitude, the first aspect of the present invention provides a catalyst preparation method, including Follow the steps below:

[0035] 1) Dissolve aluminum isopropoxide powder in deionized water, heat in a water bath to 85° C., stir mechanically for 1 h, adjust the pH value of the solution with acid, and prepare aluminum sol after stirring in a water bath.

[0036] 2) Dissolve a certain amount of organic salts of copper, manganese, iron, cerium, titanium, and zirconium in ethanol, add cationic polyacrylamide, adjust the pH value, stir in a mechanical stirrer at room temperature, and place the mixture in a hydrothermal The hydrothermal synthesis reaction is carried out in the reactor.

[0037]...

Embodiment 1

[0076] Catalyst preparation method:

[0077] 1) Dissolve 10kg of aluminum isopropoxide in 10kg of deionized water, heat in a water bath to 85°C, and stir mechanically for 1 hour. The pH value of the solution was adjusted to 3.5 with 1mol / L acetic acid, and the aluminum sol was obtained after stirring for 12 hours.

[0078] 2) Dissolve 804.67g of copper citrate, 1.3kg of manganese L-aspartate, 12.7kg of ferrous glycinate, 9.4kg of cerium isopropoxide, 593.78g of titanium propoxide, and 894.9g of zirconium ethoxide in 25kg of ethanol and add 300g of cationic polyacrylamide, use 1mol / L oxalic acid to adjust the pH=4.2, stir in a mechanical stirrer at room temperature for 5h, put the mixture in a hydrothermal reaction kettle for 12h at 220°C for hydrothermal synthesis reaction.

[0079] 3) Mix the slurry obtained after the hydrothermal synthesis reaction with the aluminum sol prepared in 1) and apply it on light-weight, low thermal conductivity, low heat capacity glass fiber pap...

Embodiment 2

[0081] Catalyst preparation method:

[0082] 1) Dissolve 12kg of aluminum isopropoxide in 12kg of deionized water, heat in a water bath to 85°C, and stir mechanically for 1 hour. The pH value of the solution was adjusted to 3.9 with 1 mol / L acetic acid, and the aluminum sol was prepared after stirring for 12 hours in a water bath.

[0083] 2) Dissolve 1.4kg copper citrate, 2.4kg manganese L-aspartate, 17.5kg ferrous glycinate, 12.9kg cerium isopropoxide, 1.4g propoxy titanium, 1.2g ethoxy zirconium in 25kg Add 420g of cationic polyacrylamide to ethanol, use 1mol / L oxalic acid to adjust the pH to 4.2, stir in a mechanical stirrer at room temperature for 5h, and place the mixture in a hydrothermal reactor at 220°C for 12h. synthesis reaction.

[0084] 3) Mix the slurry obtained after the hydrothermal synthesis reaction with the aluminum sol prepared in 1) and apply it on the glass fiber paper with light weight, low thermal conductivity and low heat capacity, and then press it ...

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Abstract

The invention provides a catalyst and its preparation method, and a flue gas CO removal-whitening system and method. The system includes a mist eliminator, a dehumidification wheel, a gas intelligent detection module, a diversion module, a heating module, a catalytic oxidation module, A flue gas return module; the demister is arranged at the flue gas inlet, and on the flue of the dust collector, a dehumidification wheel, a diversion module, a flue gas heating module, a catalytic oxidation module, and a flue gas return module are arranged in sequence. The system is located after wet desulfurization, dry denitrification or semi-dry desulfurization and before the chimney. The flue gas treatment process is not changed, the degree of renovation is small, the applicability of space is strong, and the energy consumption is low during operation, and it can be used independently. The efficient removal of CO and the whitening of flue gas are completed, and the operating cost is low. The system is installed with CO, CO 2 The concentration sensor can intelligently evaluate whether the catalytic oxidation module is working normally, and at the same time evaluate the flue gas temperature in the system to ensure the whitening effect.

Description

technical field [0001] The invention relates to the field of flue gas CO removal, in particular to a catalyst and a preparation method, and a flue gas CO removal-whitening system and method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Since the industrial revolution, metallurgy, steelmaking, and other industries have developed rapidly, satisfying the growth of the world economy and increasing environmental pollution. Heavy industrial enterprises will produce a large amount of pollutants while consuming a large amount of fossil energy, such as the ore used in metallurgy Most of the raw materials contain sulfur, and a large amount of SO will be produced during the smelt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/62B01D53/86
CPCB01D53/864B01J23/8892Y02A50/20Y02C20/40
Inventor 程星星康博凯李向东王志强王鹏马春元王鲁元张兴宇
Owner SHANDONG UNIV
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