Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-efficiency purification process of activated carbon for sintering flue gas

A purification process and sintering flue gas technology, which is applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of difficult temperature, high dust concentration, high content of alkali metals and heavy metals, etc., to reduce toxicity and improve purification efficiency , the effect of prolonging the service life

Active Publication Date: 2020-08-18
CENT SOUTH UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the problems in the prior art of sintering flue gas desulfurization and denitrification using activated carbon, there are problems such as difficult temperature control, high dust concentration in the flue gas, and high content of alkali metals and heavy metals. The sintering flue gas is pretreated in stages, and the pretreated flue gas is combined and then purified by activated carbon. This process uses the characteristics of flue gas temperature and dust emission in different sintering stages to cool down the flue gas in the heating section with high temperature and high dust concentration. And dust removal pretreatment, on the one hand, the excess heat of the flue gas is recovered and utilized, and the temperature of the flue gas is adjusted to make the flue gas temperature meet the temperature range of activated carbon purification; on the other hand, the ultrafine particles in the flue gas are greatly reduced, reducing The harmful effect of ultra-fine particles on the purification of activated carbon, rather than the high water content and low concentration of ultra-fine particles in the heating section, directly through electrostatic precipitator can meet the purification requirements of activated carbon, thereby improving the purification efficiency of activated carbon process

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
  • A high-efficiency purification process of activated carbon for sintering flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The flue gas generated during the sintering process is divided into the flue gas in the heating section and the flue gas in the non-heating section. 2.5 ) content 165mg / Nm 3 , the flue gas temperature in the non-heating section is 110°C, the water vapor content is 16.8%, and the ultrafine particulate matter (PM 2.5 ) content 43mg / Nm 3 . Cooling the flue gas in the heating section and pretreatment with bag dust removal: take out the flue gas in this section, firstly use a counter-flow water cooling tower to cool it, cool the flue gas temperature in this section to 240°C, and heat the water to 150°C Steam; pass the cooled flue gas through the bag filter to reduce the dust concentration in the flue gas to 18mg / Nm 3 . The flue gas in the non-heating section is subjected to electrostatic precipitator treatment, and then the two parts of the flue gas are combined into the activated carbon adsorption tower. After the combination, the flue gas temperature is 145°C, and the ...

Embodiment 2

[0031] The flue gas generated during the sintering process is divided into the flue gas in the heating section and the flue gas in the non-heating section. 2.5 ) content 190mg / Nm 3 , the flue gas temperature in the non-heating section is 120°C, the water vapor content is 20.3%, and the ultrafine particulate matter (PM 2.5 ) content 66mg / Nm 3 . Cooling the flue gas in the heating section and pretreatment with bag dust removal: take out the flue gas in this section, firstly use a counter-flow water cooling tower to cool it, cool the flue gas temperature in this section to 180°C, and heat the water to 170°C Steam; pass the cooled flue gas through the bag filter to reduce the dust concentration in the flue gas to 15mg / Nm 3 . The flue gas in the non-heating section is subjected to electrostatic precipitator treatment, and then the two parts of flue gas are combined into the activated carbon adsorption tower. After the combination, the flue gas temperature is 135°C, and the dust...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses an activated-carbon efficient purification process for sintering flue gas. The process comprises the steps that flue gas produced in the whole sintering process is divided intotemperature rise section flue gas and non-temperature rise section flue gas, cooling and cloth bag dust collection pretreatment are separately conducted on the temperature rise section flue gas, andelectric precipitation pretreatment is separately conducted on the non-temperature rise section flue gas; the pretreated temperature rise section flue gas and the non-temperature rise section flue gasconverge and enter an activated-carbon adsorption tower for desulfurization and denitrification treatment. The process meets the best temperature requirement for activated-carbon purification by regulating and controlling the temperature of the flue gas, meanwhile the superfine particulate matter content in the flue gas entering the activated-carbon adsorption tower is decreased, accordingly thetoxic and side effect of activated carbon is reduced, and thus the purification process of the activated-carbon efficient purification process is improved.

Description

technical field [0001] The invention relates to a process for purifying sintering flue gas, in particular to a process for pretreating sintering flue gas in sections, and then combining them to realize high-efficiency purification of activated carbon, which belongs to the technical field of comprehensive treatment of flue gas pollutants in iron and steel metallurgy. Background technique [0002] The sintering process is the main source of flue gas pollutants in the iron and steel industry. The sintering waste gas accounts for 40% of the total waste gas in the iron and steel industry. 10 , persistent organic compounds, heavy metals and other pollutants rank first in the iron and steel industry. In 2018, the Ministry of Environmental Protection issued the "Work Plan for Ultra-Low Emission Transformation of Iron and Steel Enterprises (Draft for Comment)". The ultra-low emission standard requires that the concentration of particulate matter in sintering flue gas be lower than 10...

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 Patents(China)
IPC IPC(8): B01D53/02B01D50/00
CPCB01D50/00B01D53/02B01D2253/102B01D2257/302B01D2257/40B01D2258/025B01D2258/0283
Inventor 甘敏范晓慧季志云陈许玲汪国靖袁礼顺姚佳文吕薇唐庆余姜涛
Owner CENT SOUTH UNIV