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

Method for removing acid gas in fume gas using a spray tower

An acid gas, spray tower technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as increased power consumption, system shutdown, scaling, etc., to reduce blockage and improve utilization. , to achieve the effect of reuse

Inactive Publication Date: 2009-08-19
BEIJING BOOTES ELECTRIC POWER SCI & TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorption towers used in the two patents are all packed towers. Although the gas-liquid contact area of ​​the packed tower is large, the power consumption is increased due to the large pressure drop during operation, and due to the nature of the red mud itself, the use of packing The tower will cause fouling, clogging and other problems, and even stop the system in severe cases

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 removing acid gas in fume gas using a spray tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The solid content of the red mud slurry entering the absorption tower is adjusted to 15%. Under the action of the circulating pump, the absorption slurry is sprayed out from the spray device at the upper part of the spray tower in a mist form, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 9.0, and the pH value of the absorption slurry is 6.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the absorption tower was controlled to be 20%, and the residence time of the slurry was 7 hours. absorption tower inlet SO 2 The content is 4387mg / Nm 3 , the export content is 573mg / Nm 3 , the ...

Embodiment 2

[0030] The solid content of the red mud slurry entering the absorption tower is adjusted to 20%. Under the action of the circulating pump, the absorption slurry is sprayed out from the spray device at the upper part of the spray tower in the form of a mist, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 8.0, and the pH value of the absorption slurry is 7.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the control absorption tower was 25%, and the residence time of the slurry was 8 hours. absorption tower inlet SO 2 The content is 4622mg / Nm 3 , the export content is 413mg / Nm 3 , the de...

Embodiment 3

[0032] The solid content of the red mud slurry entering the absorption tower is adjusted to 25%. Under the action of the circulating pump, the absorption slurry is sprayed from the spray device at the upper part of the spray tower in a mist form, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 7.0, and the pH value of the absorption slurry is 8.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the absorption tower was controlled to be 30%, and the residence time of the slurry was 8 hours. absorption tower inlet SO 2 The content is 5120mg / Nm 3 , the export content is 389mg / Nm 3 , the desu...

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 discloses a method for removing acid gas in flue gas by utilization of a spray tower and adoption of red mud serum as an absorbent, which comprises the following steps: 1) allowing the flue gas to enter an absorption area of the spray tower through an air inlet, and purifying the flue gas in the tower by making the flue gas contact vaporific red mud serum sprayed from one or more of spraying layers and oxidized gas introduced from the bottom of the spray tower during the lifting of the flue gas; 2) allowing the flue gas purified in the tower to penetrate through a demister on the upper part of the spray tower so as to remove small vaporific liquid droplets carried by the flue gas and generate pure flue gas, and directly exhausting the pure flue gas to the atmosphere or exhausting the pure flue gas to the atmosphere through a chimney which is arranged outside the tower; and 3) sending the red mud serum purified in the tower from the bottom of a red mud serum tank to an exhaust system for exhausting or stacking, wherein the red mud serum is added or replenished through a red mud serum pipeline during purification treatment.

Description

technical field [0001] The invention relates to a method for removing acid gas (especially sulfur-containing gas) from a spray tower using red mud discharged in the alumina production process as an absorbent. Background technique [0002] Red mud is the residue produced by the leaching of alumina from bauxite by strong alkali. For every ton of alumina produced, about 1-2 tons of red mud will appear. It is estimated that about 60 million tons of red mud are produced by the aluminum industry worldwide each year. At present, most alumina refineries in the world accumulate or dump red mud into the deep sea. The storage of red mud not only occupies a large amount of land and farmland, and consumes a lot of construction and maintenance costs of the yard, but also the residual alkali in the red mud can penetrate into the ground, causing groundwater pollution. Due to the unique physical and chemical properties of red mud, the complex chemical and phase composition has always been...

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): B01D53/80B01D53/48B01D53/40
Inventor 刘鹏程吴树志张明李永旺樊运甫顾利锋武东战
Owner BEIJING BOOTES ELECTRIC POWER SCI & TECH