Aluminum electrolysis flue gas purification system

Abstract

The utility model relates to the technical field of flue gas purification systems, in particular to an aluminum electrolysis flue gas purification system which comprises an aluminum oxide chute and a plurality of dust removers, the dust removers are fixedly connected with vertically arranged flue gas inlet branch pipes, and the flue gas inlet branch pipes are fixedly connected with VRI reactors; the aluminum oxide chute is fixedly connected with a plurality of gas stripping machines from front to back, and outlets of the gas stripping machines are connected with a VRI reactor through gas stripping pipes; the gas stripping machine comprises a gas stripping chamber, and the feeding end of the gas stripping pipe is located in the gas stripping chamber; a gas ejector pipe is also arranged in the gas stripping chamber and is positioned below the gas stripping pipe; the distances between the gas ejector pipes and the gas stripping pipes in the plurality of gas stripping machines from front to back are gradually increased; the distances between gas ejector pipes and gas stripping pipes in a plurality of gas stripping machines from front to back are gradually increased; the material supply flows of the plurality of gas stripping machines are basically the same; therefore, the flow of aluminum oxide obtained by the plurality of dust removers is more uniform, and the flue gas purification effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification systems, in particular to an aluminum electrolysis flue gas purification system. Background Art

[0002] Aluminum electrolysis produces a large amount of harmful substances during production, especially fluoride (HF), which is harmful to the health of workers, as well as the surrounding agriculture, forestry, animal husbandry, fishery and nearby residents. The aluminum electrolysis flue gas purification system uses alumina, the raw material of aluminum electrolysis production, as an adsorbent to absorb fluoride (mainly HF gas) in the electrolytic flue gas to achieve the purpose of purifying the flue gas.

[0003] The existing aluminum electrolysis flue gas purification system uses a chute to supply alumina to multiple dust collectors. The feed pipes are connected to the chute in sequence from front to back. The feed pipe located on the front side obtains more alumina material and has a larger flow rate, while the feed pipe located on the rear side obtains less alumina material and has a smaller flow rate. The flow rate of alumina obtained by multiple dust collectors is uneven, resulting in poor flue gas purification effect. Utility Model Content

[0004] The main purpose of the utility model is to provide an aluminum electrolysis fume purification system to solve the problem of uneven flow of aluminum oxide obtained by multiple dust collectors in the aluminum electrolysis fume purification system in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an aluminum electrolysis flue gas purification system, including an alumina chute and multiple dust collectors, wherein the dust collectors are fixedly connected to a vertically arranged flue gas branch pipe, and the flue gas branch pipe is fixedly connected to a VRI reactor; the alumina chute is fixedly connected to multiple air strippers from front to back, and the outlet of the air strippers is connected to the VRI reactor through an air stripping pipe; the air strippers include an air stripping chamber, and the feed end of the air stripping pipe is located in the air stripping chamber; an air jet pipe is also provided in the air stripping chamber, and the air jet pipe is located below the air stripping pipe; the spacing between the air jet pipes and the air stripping pipes in the multiple air strippers gradually increases from front to back.

[0006] Furthermore, the air jet pipe includes an air jet pipe body and a nozzle. The nozzle is threadedly connected to the outer side of the end of the air jet pipe body. A threaded hole is provided inside the nozzle head for tightening with the air jet pipe body and adjusting the tightening distance.

[0007] Furthermore, the flue gas branch pipe is fixedly connected to the flue gas main pipe; and a flue gas regulating valve is provided on the flue gas branch pipe at a position below the VRI reactor.

[0008] Furthermore, a feed pipe is provided on the side of the stripping chamber, and a fluidized bed is provided inside the chamber, and the fluidized bed is located below the top of the air injection pipe.

[0009] The utility model gradually increases the distance between the air injection pipes and the air stripping pipes in the plurality of air strippers from front to back, so that the feed flow rates of the plurality of air strippers are basically the same, thereby making the flow rates of the aluminum oxide obtained by the plurality of dust collectors more uniform and achieving better flue gas purification effect.

[0010] The utility model is provided with a nozzle and an air-jet pipe body, and the screwing distance between the nozzle and the air-jet pipe can be adjusted, thereby adjusting the distance between the nozzle and the air-lift pipe, thereby adjusting the feed flow of the air-lift machine.

[0011] The utility model is capable of adjusting the flow of the flue gas in the flue gas branch pipe by arranging the flue gas regulating valve, thereby making the flue gas processing capacity of multiple dust collectors more uniform, and further improving the flue gas purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0013] Figure 1 Schematic diagram of the structure of the aluminum electrolysis fume purification system in the embodiment;

[0014] Figure 2 Schematic diagram of the structure of the gas stripper in the embodiment;

[0015] In the figure: 1. Alumina chute; 2. Dust collector; 3. Flue gas inlet pipe; 4. Gas stripper; 401. Gas stripping chamber; 402. Feed pipe; 403. Fluidized bed; 5. VRI reactor; 6. Gas stripping pipe; 7. Jet pipe; 701. Jet pipe body; 702. Nozzle; 8. Flue gas main pipe; 9. Flue gas regulating valve. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] like Figures 1 to 2As shown, according to an embodiment of the present invention, a flue gas purification system for aluminum electrolysis is provided, comprising an alumina chute 1, a plurality of dust collectors 2, the dust collectors 2 being fixedly connected to a vertically arranged flue gas branch pipe 3, to which a VRI reactor 5 is fixedly connected; the alumina chute 1 is fixedly connected to a plurality of gas strippers 4 from front to back, the outlet of the gas strippers 4 being connected to the VRI reactor 5 via a gas stripping pipe 6; the gas strippers 4 include a gas stripping chamber 401, the feed end of the gas stripping pipe 6 being located in the gas stripping chamber 401; an air jet 7 is further provided in the gas stripping chamber 401, and the air jet 7 is located below the gas stripping pipe 6; the spacing between the air jet 7 and the gas stripping pipe 6 in the plurality of gas strippers 4 gradually increases from front to back.

[0018] By gradually increasing the distance between the air injection pipe 7 and the air stripping pipe 6 in the plurality of air strippers 4 from front to back, the feed flow rates of the plurality of air strippers 4 are made substantially the same, thereby making the flow rates of the alumina obtained by the plurality of dust collectors 2 more uniform, and achieving a better flue gas purification effect.

[0019] The nozzle 702 includes a nozzle body 701 and a nozzle 702. The nozzle 702 is threadedly connected to the outer side of the end of the nozzle body 701. A threaded hole is provided inside the nozzle 702 for tightening with the nozzle body 701 and adjusting the tightening distance.

[0020] By providing the nozzle 702 and the air injection pipe body 701 , the screwing distance between the two can be adjusted, and then the distance between the nozzle 702 and the air stripping pipe 6 can be adjusted, so that the feed flow rate of the air stripper 4 can be adjusted.

[0021] The flue gas branch pipe 3 is fixedly connected to the flue gas main pipe 8 ; a flue gas regulating valve 9 is provided on the flue gas branch pipe 3 below the VRI reactor 5 .

[0022] By providing the flue gas regulating valve 9, the flow rate of the flue gas in the flue gas branch pipe 3 can be adjusted, thereby making the flue gas processing capacity of the multiple dust collectors 2 more uniform, and further improving the flue gas purification effect.

[0023] A feed pipe 402 is provided on the side of the gas stripping chamber 401, and a fluidized bed 403 is provided inside. The fluidized bed 403 is located below the top of the injection pipe 7; an air chamber is provided below the fluidized bed 403, and the air chamber is connected to the air chamber air inlet pipe.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An aluminum electrolysis flue gas purification system, comprising an alumina chute (1), a plurality of dust collectors (2), wherein the dust collectors (2) are fixedly connected to a vertically arranged flue gas branch pipe (3), and a VRI reactor (5) is fixedly connected to the flue gas branch pipe (3); characterized in that: The alumina chute (1) is fixedly connected to a plurality of gas strippers (4) from the front to the back, and the outlet of the gas strippers (4) is connected to the VRI reactor (5) via a gas stripping pipe (6); the gas strippers (4) include a gas stripping chamber (401), and the feed end of the gas stripping pipe (6) is located in the gas stripping chamber (401); an air jet pipe (7) is further provided in the gas stripping chamber (401), and the air jet pipe (7) is located below the gas stripping pipe (6); the spacing between the air jet pipe (7) and the gas stripping pipe (6) in the plurality of gas strippers (4) increases gradually from the front to the back.

2. The aluminum electrolysis fume purification system according to claim 1, characterized in that: The jet pipe (7) comprises a jet pipe body (701) and a nozzle (702), wherein the nozzle (702) is threadedly connected to the outer side of the end of the jet pipe body (701), and a threaded hole is provided inside the nozzle (702) for tightening with the jet pipe body (701) and adjusting the tightening distance.

3. The aluminum electrolysis fume purification system according to claim 1, characterized in that: The flue gas inlet branch pipe (3) is fixedly connected to the flue gas inlet main pipe (8); a flue gas regulating valve (9) is provided on the flue gas inlet branch pipe (3) at a position below the VRI reactor (5).

4. The aluminum electrolysis fume purification system according to claim 1, characterized in that: A feed pipe (402) is provided on the side of the stripping chamber (401), and a fluidized bed (403) is provided inside the chamber. The fluidized bed (403) is located below the top of the air injection pipe (7).

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