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Regeneration method of aluminum chloride for denitration

A technology of aluminum chloride and denitrification, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, can solve problems such as high operating costs, low absorption efficiency, and low solubility, and achieve low operating costs, large processing capacity, Simple operation effect

Inactive Publication Date: 2016-05-18
黄立维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for nitrogen oxides containing more nitric oxide, because the solubility of nitric oxide in the solution is very small, the absorption efficiency is low, the medicament is more expensive, and the operating cost is high.

Method used

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  • Regeneration method of aluminum chloride for denitration
  • Regeneration method of aluminum chloride for denitration
  • Regeneration method of aluminum chloride for denitration

Examples

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Embodiment 1

[0022] Embodiment 1: A schematic diagram of a fixed-bed device for the regeneration method of aluminum chloride for denitrification is as follows figure 1 shown. The aluminum chloride regeneration furnace is a tubular type with a size of Φ60mm×600mm. About 100g of the solid product after the denitrification reaction is added to the gas-solid reaction tower. The protective inert gas of the regeneration furnace is nitrogen, and the flow rate is about 1-3L / min. It adopts a tubular type Electric furnace heating, the temperature of the regeneration furnace is about 100°C, 150°C, 180°C, 250°C and 350°C respectively, and the reaction time is about 90min, 45min, 20min, 10min and 5min respectively, and the solid product is decomposed to release nitrogen oxides The material process is basically completed, and when the temperature is higher than 180°C, the aluminum chloride will be gasified, and it needs to be condensed to recover solid aluminum chloride. Then introduce hydrogen chlorid...

Embodiment 2

[0023] Embodiment 2: In the above-mentioned embodiment 1, the heating temperature of the regeneration furnace is 180°C, and the reaction time is about 20 minutes. Introduce about 50mL of hydrochloric acid with a content of about 5%, 15% and 36% respectively to the aluminum chloride regeneration furnace, make the solid product soak in the hydrochloric acid, then import hydrogen chloride gas with a content of about 15% into the aluminum chloride regeneration furnace, and keep The temperature of the regeneration furnace is about 98°C, and the reaction time is about 60 minutes, 40 minutes and 30 minutes respectively, and the basic aluminum chloride and aluminum hydroxide contained in the solid product are converted into aluminum chloride. Other conditions are the same as example 1.

Embodiment 3

[0024] Embodiment 3: a kind of described denitrification uses the regenerative furnace of aluminum chloride as the device schematic diagram of aluminum chloride solid particle gasification furnace as figure 2 shown. The solid aluminum chloride obtained in the regeneration furnace of Example 1 is heated in the regeneration furnace at a heating temperature of about 180°C-210°C. The cooler is a tubular type with a diameter of Φ40mm and a length of 1000mm. Cool naturally, and the gas after cooling The outlet temperature is about 40°C-80°C (determined according to the reaction temperature of the gas-solid reaction tower), the protective gas of the regeneration furnace is nitrogen, the carrier gas is also nitrogen, the diameter of the gas-solid reaction tower is Φ60mm, and the effective contact height of the reaction is About 1000mm, empty tower, tower body material is 316L stainless steel. The concentration of nitrogen oxides (nitric oxide about 90%) in the gas stream is 500ppm, ...

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Abstract

The invention relates to a regeneration method of aluminum chloride for denitration and belongs to the technical field of air pollution control and environmental protection. The treatment process of the method is as follows: aluminum chloride solid particles and nitric oxides in airflow have a chemical reaction in a gas-solid reaction tower to produce a solid product to be introduced into an aluminum chloride regeneration furnace, heating is performed in the shielding atmosphere of inert gases such as nitrogen and the like or after vacuum pumping, absorbed nitric oxides are released, hydrogen chloride gas is further introduced into the aluminum chloride regeneration furnace, basic aluminum chloride and aluminum hydroxide in the solid product are converted into aluminum chloride, so that the aluminum chloride is regenerated, nitric acid can be recovered, and the aluminum chloride regeneration furnace can also be used as a gasification furnace for preparing aluminum chloride solid particles for denitration. The regeneration method has the characteristics of low investment cost and running cost, simplicity in operation, high treatment efficiency and high treatment capacity.

Description

technical field [0001] The invention relates to a method for regenerating aluminum chloride for denitrification, and belongs to the technical field of air pollution control and related environmental protection. Background technique [0002] Nitrogen oxides (NOx) produced by human activities x ) mainly includes NO and NO 2 , of which more than 90% are produced by fuel combustion, followed by industrial processes such as nitric acid production, chemical and pharmaceutical nitration reactions, metal surface and semiconductor processing. NO X It is toxic to humans, and a large amount of nitrogen oxide emissions is also one of the main causes of atmospheric photochemical smog and acid rain. Statistical data in the Bulletin on the State of the Environment in China shows that the contribution of nitrogen oxides in acid rain in my country's cities is increasing, and the nature of acid rain pollution in some places has begun to change from sulfuric acid to nitrate ions (Ministry o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/56B01D53/96
CPCB01D53/565B01D53/96B01D2251/60
Inventor 黄立维
Owner 黄立维
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