Composite solution for sulphur dioxide absorption in membrane separation

A compound solution and sulfur dioxide technology, applied in the field of flue gas desulfurization, liquid-gas separation, to achieve the effect of easy purchase, small foaming and high desulfurization rate

Inactive Publication Date: 2013-10-09
NANJING UNIV OF INFORMATION SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We absorb SO in the membrane 2 A lot of experimental research work has been done on composite absorbents, and novel and efficient composite absorbents have been proposed, which are currently used in flue gas purification of SO 2 There is no use and report in the field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite solution for sulphur dioxide absorption in membrane separation
  • Composite solution for sulphur dioxide absorption in membrane separation
  • Composite solution for sulphur dioxide absorption in membrane separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A performance evaluation method for the application of composite solutions in membrane contactors for sulfur dioxide membrane absorption.

[0026] Operating conditions: room temperature (19-22°C), mixed gas pressure 0.11MPa, membrane mass transfer area 1.5 m 2 , the gas flow rate is 0.5-2 L / min, and the liquid flow rate is 200-500mL / min.

[0027] Such as figure 1 shown, respectively from N 2 Gas cylinder 1-1 and SO 2 After the gas in the gas cylinder 1-2 is measured by the gas quality control instrument 2, it enters the mixing and stabilizing tank 3 to form SO containing 0.1%-0.6% (volume percentage). 2 Mixed gas, the mixed gas after the air flow is stabilized enters the membrane contactor 4, and the SO in the mixed gas 2 It diffuses to the other side of the membrane through the membrane pores, is absorbed by the composite desulfurizer, that is, the aforementioned composite solution in the present invention, enters the liquid phase, and the absorbed gas phase is rel...

Embodiment 2

[0037] The composite solution used to absorb sulfur dioxide in the mixed gas is an aqueous solution of potassium lactate / sodium lactate and glycinate, the total concentration of potassium lactate / sodium lactate and glycinate in the aqueous solution is 0.1~3.6mol / L, and the concentration of potassium lactate / sodium lactate and glycinate The molar ratio is 1:(0.5~2.2).

[0038] In this embodiment, the glycinate may be sodium glycinate, potassium glycinate or a mixture of sodium glycinate and potassium glycinate.

[0039] The performance evaluation method in Example 1 is used for detection.

[0040] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.

[0041] The performance evaluation results of various desulfurizers under various conditions are shown in Table 1.

[0042] Table 1 Performance evaluation re...

Embodiment 3

[0047] The composite solution used to absorb sulfur dioxide in the mixed gas is an aqueous solution of potassium lactate / sodium lactate and β-alanine salt, the total concentration of potassium lactate / sodium lactate and β-alanine salt in the aqueous solution is 0.1~3.6mol / L, The molar ratio of potassium lactate / sodium lactate to β-alanine salt is 1: (0.5~2.2).

[0048] In this embodiment, the β-alanine salt can be sodium β-alanine, potassium β-alanine or a mixture of sodium β-alanine and potassium β-alanine.

[0049] The performance evaluation method in Example 1 is used for detection.

[0050] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.

[0051] The performance evaluation results of various desulfurizers under various conditions are shown in Table 2.

[0052] Table 2 Performance evaluation resu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the field of liquid-gas separation, in particular relates to the field of smoke desulfuration, and more in particular relates to a composite solution for absorbing sulphur dioxide in mixed gas. The invention aims at providing a sulphur dioxide absorbent capable of being used for absorption for a membrane contactor. The smoke composite-type desulfurizer disclosed by the invention is composed of the aqueous solution of lactic acid salt and amino acid salt, wherein the mixing molar ratio of the lactic acid salt to the amino acid salt is 1: (0.5 to 2.2). The composite-type desulfurizer disclosed by the invention is good in chemical stability, low in foaminess and low in viscosity, and raw materials are abundant in source, easy to buy and low in price. A desulfuration process using the composite-type desulfurizer disclosed by the invention is high in mass transfer coefficient, undisturbed in gas-liquid flow, low in mass transfer resistance, high in desulfuration rate, convenient to operate, high in operation flexibility, free from secondary pollution, and capable of stably running in the membrane contactor.

Description

technical field [0001] The invention relates to the field of liquid-gas separation, in particular to the field of flue gas desulfurization, and more specifically to a composite solution for absorbing sulfur dioxide in membrane separation. [0002] Background technique [0003] SO in the flue gas of coal-fired power plants and metallurgical industries 2 It is one of the main pollutants in the atmosphere and the source of acid rain. With the increasing requirements of environmental protection on the emission of air pollutants, in the flue gas desulfurization purification, how to reasonably select the desulfurization process to achieve SO 2 Emissions in line with the national emission standards is a key issue for the healthy development of flue gas desulfurization in coal-fired power plants and metallurgical industries. Therefore, various high-performance SO 2 The development of absorbents is one of the research topics in this field. In recent years, composite absorbents ha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 陆建刚陆春婷陈悦张慧
Owner NANJING UNIV OF INFORMATION SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap