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

Flue gas mercury removing method

A technology for flue gas and mercury removal agent, applied in the field of mercury removal from flue gas, can solve problems such as the adverse effect of hydrogen sulfide on the conversion process of sulfuric acid system, and achieve the effect of avoiding negative effects and excessive concentration

Active Publication Date: 2018-11-27
CHINA ENFI ENGINEERING CORPORATION
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] The main purpose of the present invention is to provide a method for removing mercury from flue gas, so as to solve the problem in the prior art that using sodium sulfide as a mercury removing agent is easy to generate excessive hydrogen sulfide and cause adverse effects on the conversion process of sulfuric acid system

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
  • Flue gas mercury removing method
  • Flue gas mercury removing method
  • Flue gas mercury removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The mercury removal method that the present embodiment provides comprises the following steps:

[0072] Elemental mercury in flue gas 80mg / Nm 3 , the moisture in the flue gas is close to saturation, and the composite mercury removal agent uses Na 2 S and Na 2 S 2 o 3 And configure it with water to form a mixed solution. The mass concentration of the composite mercury removal agent in the solution is 4%. A high-pressure injector is installed in the mercury removal reactor to feed the flue gas into the reactor with a flow rate of 1.5m / s. The composite mercury removal agent is sprayed through a high-pressure injector and contacts with the flue gas downstream, the injection pressure is 0.2MPa, and the reaction temperature of flue gas mercury removal is 23°C.

Embodiment 2

[0074] The difference between the mercury removal method provided by this embodiment and embodiment 1 is:

[0075] The mass concentration of the composite mercury removal agent in the mixed solution containing the composite mercury removal agent is 5%.

Embodiment 3

[0077] The difference between the mercury removal method provided by this embodiment and embodiment 1 is:

[0078] The mass concentration of the composite mercury removal agent in the mixed solution containing the composite mercury removal agent is 25%.

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 provides a flue gas mercury removing method. The flue gas mercury removing method comprises the following steps of performing mercury removal, during which mercury remover reacts with sulfur dioxide inside the flue gas into produce elemental sulfur which is applied to processing mercury contained in the flue gas. The mercury remover reacts with the sulfur dioxide inside the flue gasto produce the high-dispersion and high-activity elemental sulfur, which can effectively react with the sulfur dioxide inside the flue gas into mercury sulfide and accordingly remove the mercury out of a system, and also, unreacted superfluous elemental sulfur can be discharged out of the system along with the mercury sulfide. Therefore, the flue gas mercury removing method can achieve mercury removal of the flue gas, and with the superfluous elemental sulfur, can avoid excessive concentration of hydrogen sulfide and further avoid adverse effects of excessive hydrogen sulfide on a subsequent sulfuric acid system.

Description

technical field [0001] The invention relates to the technical field of flue gas mercury removal, in particular to a flue gas mercury removal method. Background technique [0002] At present, flue gas mercury removal technologies mainly include chlorination method, activated carbon method, sodium sulfide method, selenium filtration method, sulfuric acid washing method, potassium iodide method, ozone method, SCR method, etc., which are used under different flue gas conditions. Among them, the chlorination method, iodine complexation-electrolysis method, sulfuric acid washing method and sodium sulfide method are used for non-ferrous smelting flue gas. The main application characteristics of the main flue gas mercury removal methods are as follows: [0003] ① Chlorination method: also known as Boliden-Norzink mercury removal method, which was first promoted to China by Boliden Company. This method is used to remove gaseous zero-valent mercury in smelting flue gas, and can prod...

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
IPC IPC(8): B01D53/79B01D53/64B01D53/50
CPCB01D53/502B01D53/507B01D53/64B01D53/79B01D2251/304B01D2251/404B01D2251/60B01D2251/608B01D2257/602B01D2258/0283
Inventor 王姣赵凯杜士帽马小乐
Owner CHINA ENFI ENGINEERING CORPORATION
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