Combined-type absorbent used for selectively absorbing SO2 and application of combined-type absorbent

A kind of SO2, composite technology, applied in the direction of gas treatment, membrane technology, dispersed particle separation, etc., can solve the problems of difficult management and maintenance, high operating costs, secondary pollution, etc., to achieve simple preparation process, high absorption efficiency, high absorption rate fast effect

Inactive Publication Date: 2016-06-01
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the removal efficiency of wet desulfurization technology is as high as 90% or more and the utilization rate of desulfurizer is high, the equipment cost is equivalent to 10% of the total construction cost of the power plant, and the operation cost is expensive, management and maintenance are difficult, and secondary pollution occurs
Traditional non-resourced SO 2 The removal technology consumes absorbent and produces a large amount of waste water, making it inconsistent with the concept of green chemical industry

Method used

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  • Combined-type absorbent used for selectively absorbing SO2 and application of combined-type absorbent
  • Combined-type absorbent used for selectively absorbing SO2 and application of combined-type absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 10.3 g of diethylenetriamine, add 11.0 g of 1,1,3,3-tetramethylurea, 5 g of water, and 3.7 g of concentrated sulfuric acid with a purity of 98% in sequence to prepare an absorbent. pure SO 2 gas and SO 2 The mixed gas with content of 8000ppm was subjected to absorption experiment at 30°C.

[0029] The absorbent for pure SO 2 The absorption capacity of gas is 30g, and the unit absorption capacity is 0.77g / g(SO 2 / absorbent). The desulfurization rate of the absorbent mixed gas reaches 99.1%.

Embodiment 2

[0043] Weigh 10.3 g of diethylenetriamine, add 11 g of N-methylpyrrolidone, 5 g of water, and 3.7 g of concentrated sulfuric acid with a purity of 98% in sequence to prepare an absorbent. pure SO 2 gas and SO 2 The mixed gas with content of 8000ppm was subjected to absorption experiment at 30°C.

[0044] The unit absorption is 0.76g / g(SO 2 / absorbent). The desulfurization rate of the absorbent mixed gas reaches 98.2%.

Embodiment 3

[0046] Weigh 9.8 g of tetraethylethylenediamine, add 11 g of N,N-dimethylacetamide, 5 g of water, and 4.2 g of concentrated sulfuric acid with a purity of 98% in sequence to prepare an absorbent. pure SO 2 gas and SO 2 The mixed gas with content of 8000ppm was subjected to absorption experiment at 30°C.

[0047] The unit absorption is 0.69g / g(SO 2 / absorbent). The desulfurization rate of the absorbent mixed gas reaches 97.2%.

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Abstract

A combined-type absorbent used for selectively absorbingSO2 comprises three ingredients: water, polyamino compound strong acid salt, and at least one of amide compounds and urea compounds, wherein the polyamino compound strong acid salt is obtained via reaction between a polyamino compound and organic strong acid/inorganic strong acid. As the alkalinities of different amido groups are different, the invention provides the combined-type absorbent according to a PH buffer solution principle, the preparation technology is simple, and the cost is low; the absorption selectivity of SO2 is high, the absorption efficiency is high, and SO2 can be recycled.

Description

technical field [0001] The invention belongs to the field of functional ionic liquids, in particular to a method for selectively absorbing SO 2 Composite absorbents and their applications. Background technique [0002] SO 2 It is one of the main air pollutants and the main cause of acid rain and photochemical smog. From 2011 to 2015, my country's total sulfur dioxide emissions were around 20 million tons, ranking first in the world. With the improvement of environmental protection awareness and the increasingly stringent requirements for air pollutant emissions, higher requirements are put forward for flue gas desulfurization technology. [0003] There are many kinds of flue gas desulfurization technologies. Countries around the world began to study desulfurization technologies in the 1950s, and up to now there are more than 200 desulfurization technologies. According to the dry and wet forms of desulfurization products, flue gas desulfurization can be divided into wet, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1481B01D2252/103B01D2252/20415B01D2252/2053B01D2252/30B01D2252/50B01D2257/302B01D2258/0283
Inventor 张吕鸿杨华伟姜斌张艳玲
Owner TIANJIN UNIV
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