Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for treating low-temperature flue gas

A technology of low-temperature flue gas and treatment method, which is applied in the directions of gas treatment, separation method, chemical instrument and method, etc., can solve the problem of incapable of simultaneous desulfurization and denitration treatment of low-temperature flue gas.

Active Publication Date: 2020-02-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for low-temperature flue gas in order to overcome the problem that the prior art cannot directly perform simultaneous desulfurization and denitrification treatment on low-temperature flue gas

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
  • Method for treating low-temperature flue gas
  • Method for treating low-temperature flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051](1) Conduct gas-liquid contact reaction between low-temperature flue gas (temperature 35°C) and liquid complexing agent, control the volume ratio of liquid complexing agent and low-temperature flue gas to 1:1, the reaction temperature is 35°C, and the reaction time is 10s, to obtain the exhausted liquid complexing agent and the flue gas from which nitrogen oxides and hydrogen sulfide have been removed;

[0052] (2) Carry out tempering treatment with the invalidated liquid complexing agent obtained in step (1), control the concentration of the obtained tempering liquid complexing agent to be 0.7% by weight, and the pH value is 6.5;

[0053] (3) Regenerate the tempered liquid complexing agent obtained in step (2) under stirring, control the reaction temperature to 70°C, the reaction time is 60min, and the stirring speed is 500rpm to obtain the regenerated liquid complexing agent, and circulate for use In step (1).

Embodiment 2

[0055] (1) Conduct gas-liquid contact reaction between low-temperature flue gas (temperature 45°C) and liquid complexing agent, control the volume ratio of liquid complexing agent and low-temperature flue gas to 3:1, the reaction temperature is 45°C, and the reaction time is 7s, to obtain the exhausted liquid complexing agent and the flue gas from which nitrogen oxides and hydrogen sulfide have been removed;

[0056] (2) Carry out tempering treatment to the invalidated liquid complexing agent obtained in step (1), control the concentration of the obtained tempering liquid complexing agent to be 0.8% by weight, and the pH value is 7;

[0057] (3) Perform the regeneration reaction of the conditioning liquid complexing agent obtained in step (2) under stirring, control the reaction temperature to be 80°C, the reaction time is 45min, and the stirring speed is 350rpm to obtain the regeneration liquid complexing agent, and circulate for use In step (1).

Embodiment 3

[0059] (1) Conduct gas-liquid contact reaction between low-temperature flue gas (temperature 50°C) and liquid complexing agent, control the volume ratio of liquid complexing agent and low-temperature flue gas to 5:1, the reaction temperature is 50°C, and the reaction time is 5s, to obtain the exhausted liquid complexing agent and the flue gas from which nitrogen oxides and hydrogen sulfide have been removed;

[0060] (2) Carry out tempering treatment to the invalidated liquid complexing agent obtained in step (1), control the concentration of the obtained tempering liquid complexing agent to be 0.9% by weight, and the pH value is 7.5;

[0061] (3) The conditioning liquid complexing agent obtained in step (2) is subjected to a regeneration reaction under stirring, the reaction temperature is controlled at 90° C., the reaction time is 30 min, and the stirring speed is 150 rpm.

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 environmental protection, and discloses a method for treating low-temperature flue gas. The method comprises the following steps: (1) carrying out gas-liquid contact reaction on the low-temperature flue gas and a liquid complexing agent to obtain a failed liquid complexing agent and flue gas from which nitrogen oxides and hydrogen sulfide are removed; (2) quenching and tempering the failed liquid complexing agent obtained in the step (1) to obtain a quenched and tempered liquid complexing agent; and (3) regenerating the quenched and tempered liquid complexing agent obtained in the step (2) to obtain a regenerated liquid complexing agent. The method can simultaneously remove nitrogen oxides and hydrogen sulfide in the low-temperature flue gas, and overcomes a problem that the low-temperature flue gas needs to be heated and then treated in a traditional method, and can directly perform gas-liquid contact reaction with the low-temperature flue gas. According to the method, the liquid complexing agent can be regenerated, so that recycling of the liquid complexing agent is realized. The method has characteristics of environmental protection, resource saving and good recyclability.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for processing low-temperature flue gas. Background technique [0002] During the production, transportation and loading and unloading of steel and coking fields, a large amount of flue gas will be generated, and the flue gas contains nitrogen oxides (NO x ) and hydrogen sulfide (H 2 S), direct discharge will cause great harm to human beings and the environment. [0003] At present, the methods for treating nitrogen oxides and hydrogen sulfide in flue gas are mainly for the treatment of flue gas with higher temperature, and there has been no mature and feasible method for the treatment of low-temperature flue gas. Contents of the invention [0004] The object of the present invention is to provide a treatment method for low-temperature flue gas in order to overcome the problem in the prior art that simultaneous desulfurization and denitrification cannot be dir...

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): B01D53/52B01D53/56B01D53/78B01D53/96
CPCB01D53/78B01D53/52B01D53/56B01D53/96B01D2258/0283
Inventor 王建山刘鹏举邱正秋张小龙
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com