Charging method and device for purifying two stages by electrolyzing flue gas using aluminum
A flue gas purification and feeding device technology, applied in the field of aluminum electrolysis dry purification and feeding, can solve the problems of unsatisfactory use effect, uneven mixing, long mixing time, etc., and achieves easy implementation, improved recycling rate, and good purification effect. Effect
Active Publication Date: 2010-07-21
GUIYANG AL-MG DESIGN & RES INST
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The current feeding method for electrolytic flue gas purification mostly adopts the VRI feeding method. The device used in this feeding method has a complex structure and is difficult to maintain. In the prior art, fresh alumina and fluorinated alumina are added to the electrolytic flue gas. At the same time, fresh alumina and fluorine-containing alumina should be mixed first and then added to the electrolytic flue gas together. Judging from the feeding and mixing of the existing purification system, there is still uneven mixing, long mixing time, and the mixing process There are disadvantages such as large energy waste, therefore, its use effect is not ideal
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0016] Example: Two-stage feeding method for flue gas purification of aluminum electrolysis, separate feeding of fluorine-containing alumina and fresh alumina, and the two kinds of alumina are divided into two stages from the upper and lower parts of the Venturi tube 1 and added to the same section of the Venturi tube 1 Inside, fresh alumina is added to the upper cavity of the Venturi tube 1 connected to the smoke exhaust pipe through the upper feeding pipe 2, and a receiving plate 3 is provided below the discharge port of the feeding pipe 2, so that from the feeding pipe 2 The fresh alumina coming out of the discharge port is accumulated on the receiving plate 3, because the receiving plate 3 has the effect of blocking the airflow in the Venturi tube 1, so that the flue gas can form a recirculation zone on the upper part of its peripheral side and accumulate on the The fresh alumina on the receiving plate 3 overflows from the surroundings of the receiving plate 3 and is swept ...
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
Login to View More Abstract
The present invention discloses method and apparatus for two-stage feeding in aluminum electrolysis flue gas clean-up, wherein the novel aluminum oxide is added to the inner cavity at the upper side of the venturi tube (1) connected to the smoke discharging pipe through the upper feed pipe (2), and the fluorine containing aluminum oxide is added to the inner cavity at the lower side of the venturi tube (1) connected to the smoke discharging pipe through the lower feed pipe (9). The present invention effectively mixes the aluminum oxide and the flue gas thoroughly to keep them in contact homogeneously by the two-stage feeding at the same pipeline section; achieves the goal of improving the cleaning efficiency of the purification system by thoroughly adsorbing fluorides in the flue gas to the aluminum oxide; at the same time, improves the reclaiming and use ratio of primary materials such as fluorides, reduces the quantity of consumption of the primary materials, is easy to carry into execution.
Description
technical field [0001] The invention relates to a method and device for dry purification and feeding of aluminum electrolysis, in particular to a two-stage feeding method and device for flue gas purification of aluminum electrolysis. Background technique [0002] In the dry purification system of aluminum electrolysis flue gas, it is necessary to add fresh alumina and fluorine-containing alumina to the electrolysis flue gas to absorb hydrogen fluoride in the flue gas, so it is necessary to fully mix the alumina and flue gas. The current feeding method for electrolytic flue gas purification mostly adopts the VRI feeding method. The device used in this feeding method has a complex structure and is difficult to maintain. In the prior art, fresh alumina and fluorinated alumina are added to the electrolytic flue gas. At the same time, fresh alumina and fluorine-containing alumina should be mixed first and then added to the electrolytic flue gas together. Judging from the feeding ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/14C25C3/22
Inventor 刘迅汪洋邓翔邓七一杨凯
Owner GUIYANG AL-MG DESIGN & RES INST