Method for strengthening oxidation of ammonium sulfite

A technology for strengthening ammonium sulfite and ammonium sulfite, which is applied in chemical instruments and methods, separation methods, perfluorocarbon/hydrofluorocarbon capture, etc. Slowness, constraints and other problems, to achieve the effect of good oxidation effect, low equipment investment cost and reliable operation

Pending Publication Date: 2021-08-03
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxidation rate of ammonium sulfite is slow and the high concentration of ammonium sulfite is difficult to completely oxidize, which greatly restricts the further development of ammonia desulfurization

Method used

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  • Method for strengthening oxidation of ammonium sulfite
  • Method for strengthening oxidation of ammonium sulfite

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Use a supergravity machine (developed by Beijing University of Chemical Technology by itself), use wire mesh packing, adjust the speed of the supergravity machine to 1200 rpm, and flow air and ammonium sulfite solution from the gas inlet respectively according to the gas-liquid flow volume ratio of 2:1 and the liquid inlet into the supergravity machine, the temperature of the ammonium sulfite solution is 60°C, the air temperature and pressure are 25°C and 0.1MPa respectively, the concentration of the ammonium sulfite solution is 0.2mol / L, and the pH of the ammonium sulfite solution is 8.14. Under batch operation, after 500ml of ammonium sulfite solution was circulated and oxidized in the supergravity machine for 10 minutes, the oxidation rate of ammonium sulfite was 63.38%.

Embodiment 2

[0035] Using a supergravity machine (self-developed by Beijing University of Chemical Technology), using wire mesh filler, adjusting the speed of the supergravity machine to 1400 rpm, according to the gas-liquid flow volume ratio of 2:1, pure oxygen and ammonium sulfite solution were separated from the gas The inlet and the liquid inlet are sent into the supergravity machine, the temperature of the ammonium sulfite solution is 50°C, the temperature and pressure of pure oxygen are 25°C and 0.1MPa respectively, the concentration of the ammonium sulfite solution is 0.2mol / L, and the pH of the ammonium sulfite solution is The value is 8.14. Under batch operation, after 500ml of ammonium sulfite solution was circulated and oxidized in the supergravity machine for 1min, the oxidation rate of ammonium sulfite was 74.11%.

Embodiment 3

[0037] Using a supergravity machine (developed by Beijing University of Chemical Technology), using wire mesh filler, adjusting the speed of the supergravity machine to 1200 rpm, and mixing air and ammonium sulfite solution with positive twelve according to the gas-liquid flow volume ratio of 2:1 The alkane mixed liquid is sent into the supergravity machine from the gas inlet and the liquid inlet respectively, the volume fraction of n-dodecane is 8%, the temperature of the ammonium sulfite solution is 60°C, the air temperature and pressure are 25°C and 0.1MPa respectively, and the The concentration of the ammonium sulfate solution is 0.2mol / L, and the pH value of the ammonium sulfite solution is 8.14. Under batch operation, after 500ml of ammonium sulfite solution was circulated and oxidized in the supergravity machine for 10 minutes, the oxidation rate of ammonium sulfite was 74.3%.

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Abstract

The invention provides a method for strengthening oxidation of ammonium sulfite, which comprises the following steps that gas containing oxidizing components enters a supergravity machine from a gas inlet, and an ammonium sulfite solution enters the supergravity machine from a liquid inlet; in the supergravity machine, the ammonium sulfite solution is in contact with a gas phase containing oxidizing components, oxidizing substances in the gas phase enter the ammonium sulfite solution and react with ammonium sulfite, after the reaction, the liquid phase leaves the supergravity machine from the liquid outlet, and the gas phase leaves the supergravity machine from the gas outlet. According to the method, the characteristic that the supergravity machine strengthens gas-liquid mass transfer is utilized, the absorption effect of the ammonium sulfite solution on oxidizing components in a gas phase is remarkably improved, the oxidation efficiency of ammonium sulfite is improved, and the method has the advantages of being simple in equipment structure, small in size, low in energy consumption and the like and is a new technology for strengthening ammonium sulfite oxidation.

Description

technical field [0001] The invention relates to a method for strengthening the oxidation of ammonium sulfite, in particular to a method for strengthening the oxidation of ammonium sulfite by using a supergravity machine. Background technique [0002] At present, coal plays a major role in my country's energy structure. However, coal contains a certain amount of sulfur. In order to prevent the release of SO in the process of utilizing coal resources, 2 To pollute the environment, it is necessary to use desulfurization technology to capture sulfur. At present, the world's main countermeasures for sulfur emissions in coal combustion can be roughly divided into three types: front-end control technology (desulfurization before combustion), mid-end desulfurization technology (desulfurization during combustion) and terminal treatment technology (desulfurization after combustion), Among them, the most widely used is the end-to-end SO in the flue gas 2 Remove. According to the dif...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/86B01D53/34B01F9/00
CPCB01D53/78B01D53/502B01D53/8609B01D53/346B01D2251/206B01D2251/60B01D2258/0283B01F29/15Y02C20/30
Inventor 邵磊方夕宏韩榕
Owner BEIJING UNIV OF CHEM TECH
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