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Porous water-solid desulfurization block for electrolytic aluminum flue gas desulfurization and preparation method thereof

A technology for electrolysis of aluminum and flue gas, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation. The effect of reduced dosage and ultra-low emission

Active Publication Date: 2022-03-15
河南润兴环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention patent with the publication number CN 106422746A discloses a filler for flue gas desulfurization and denitrification and its preparation method. The filler is composed of magnesium oxide, magnesium chloride, phosphoric acid, glass fiber, adhesive and foaming agent. After treatment, the inside of the filler is a porous structure, and the surface ratio of the filler is increased, but the pores inside the filler are not connected to each other, which is equivalent to filling the filler with air bubbles to expand the volume of the filler and increase the surface ratio. The filler cannot increase the residence time of the flue gas inside the filler, and it is only suitable for high sulfur content in the flue gas (1000-3000mg / m 3 ) for desulfurization and denitrification treatment, for large gas flow, low flue gas temperature, SO 2 Electrolytic flue gas treatment with low levels is not suitable

Method used

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  • Porous water-solid desulfurization block for electrolytic aluminum flue gas desulfurization and preparation method thereof
  • Porous water-solid desulfurization block for electrolytic aluminum flue gas desulfurization and preparation method thereof

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Embodiment 1

[0024] A porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization is prepared from the following raw materials: 50 kg of magnesium hydroxide, 12 kg of perlite, 10 kg of hydrochloric acid, 8 kg of solid water glass and 20 kg of water. The particle size of perlite is 1mm.

[0025] The preparation method of the above-mentioned porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization comprises the following steps:

[0026] A: Weigh the raw materials according to the above quality, put magnesium hydroxide, solid water glass and water into the mixer, stir at 100r / min for 10min; then add hydrochloric acid, stir at 100r / min for 10min; then add perlite, stir at 100r / min for 5min get mixed material;

[0027] B: Add the mixed material in step A into the mold for compaction to prepare a porous solid water desulfurization block, and dry it for later use.

Embodiment 2

[0029] A porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization is prepared from the following raw materials: 40 kg of magnesium hydroxide, 5 kg of slag, 20 kg of hydrochloric acid, 5 kg of cement, 10 kg of solid water glass and 20 kg of water. The particle size of the slag was 6 mm.

[0030] The preparation method of the above-mentioned porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization comprises the following steps:

[0031] A: Weigh the raw materials according to the above quality, put magnesium hydroxide, solid water glass and water into the mixer, stir at 30r / min for 3min; then add hydrochloric acid, stir at 60r / min for 5min; then add perlite, stir at 80r / min for 3min get mixed material;

[0032] B: Add the mixed material in step A into the mold for compaction to prepare a porous solid water desulfurization block, and dry it for later use.

Embodiment 3

[0034] A porous water-solid desulfurization block for electrolytic aluminum flue gas desulfurization is prepared from the following raw materials: 70 kg of magnesium hydroxide, 10 kg of vermiculite, 5 kg of hydrochloric acid, 5 kg of cement and 10 kg of water. The particle size of perlite is 1mm.

[0035] The preparation method of the above-mentioned porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization comprises the following steps:

[0036] A: Weigh the raw materials according to the above quality, put magnesium hydroxide, solid water glass and water into the mixer, stir at 60r / min for 1min; then add hydrochloric acid, stir at 30r / min for 1min; then add perlite, stir at 30r / min for 1min get mixed material;

[0037] B: Add the mixed material in step A into the mold for compaction to prepare a porous solid water desulfurization block, and dry it for later use.

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Abstract

The invention belongs to the technical field of electrolytic aluminum flue gas desulfurization in the electrolytic aluminum industry, and specifically relates to a porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization and a preparation method thereof. The porous solid water desulfurization block is prepared from the following raw materials in mass percentage: magnesium hydroxide 40%~70%, water solid particles 5%~25%, hydrochloric acid 5%~20%, binder 5%~15% and water 10% %~30%. The desulfurization block has interconnected pores inside, which can prolong the SO 2 The residence time in the desulfurization block makes it suitable for electrolytic aluminum with a large amount of flue gas and SO 2 Low concentration; water-fixing particles have a good water-absorbing and water-fixing effect. Under the condition of spraying circulating water, a large amount of water film is formed on the surface of the desulfurization block, so that the generated magnesium salt can be quickly dissolved in water and taken out for desulfurization Tower, after the magnesium ions are replaced, enter the desulfurization chamber and SO 2 Continue the reaction, so that SO in the electrolytic aluminum flue gas can be efficiently removed 2 , to achieve ultra-low emissions.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum flue gas desulfurization in the electrolytic aluminum industry, and in particular relates to a porous solid water desulfurization block for electrolytic aluminum flue gas desulfurization and a preparation method thereof. Background technique [0002] The current prebaked anode aluminum electrolytic cell will produce CO during the electrolysis process 2 , CO, SO 2 Harmful gases such as HF and HF (abbreviated as anode gas), the anode gas escapes through the burner hole in the middle of the electrolytic cell, enters the upper part of the electrolytic cell, and is sucked into the flue gas pipe by the gas collection system, and a large amount of external air is sucked in together The exhaust system of the electrolyzer forms electrolytic flue gas. The gas flow rate of the electrolysis flue gas is large, the temperature of the flue gas is low (about 120°C), and the SO 2 Content as low as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/82B01D53/50
Inventor 崔继涛
Owner 河南润兴环保材料有限公司