CN212757918U - Flue gas dust removal and purification device - Google Patents
Flue gas dust removal and purification device Download PDFInfo
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- CN212757918U CN212757918U CN202020827468.9U CN202020827468U CN212757918U CN 212757918 U CN212757918 U CN 212757918U CN 202020827468 U CN202020827468 U CN 202020827468U CN 212757918 U CN212757918 U CN 212757918U
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Abstract
The utility model relates to the technical field of electrolytic aluminum flue gas purification devices, in particular to a flue gas dust removal purification device, the device comprises a box body and a conveying flue, wherein the box body is divided into an upper box body and a middle box body, a cloth bag dust removing mechanism for gas-solid separation is arranged between the upper box body and the middle box body, the upper box body is provided with an exhaust port, the middle box body is provided with an adding port for adding alumina, the cyclone separator is further included, wherein a gas-solid mixing inlet of the cyclone separator is communicated with the conveying flue, a gas outlet is communicated with the middle box body, the lower end of the middle box body is provided with a material returning pipe communicated with a gas-solid mixing inlet of the cyclone separator, and fluorine-carrying alumina generated by reaction in the middle box body enters the cyclone separator from the return pipe to react with the flue gas again, is separated and is discharged from the solid discharge port. The utility model makes full use of the adsorption performance of different alumina and lightens the load of the cloth bag dust removing mechanism.
Description
Technical Field
The utility model relates to an electrolytic aluminum gas cleaning device technical field especially relates to a gas cleaning and dust removal device.
Background
In the electrolytic aluminum industry, the aluminum electrolysis process takes alumina melt as electrolyte and takes carbon material as electrode for electrolysis, liquid aluminum is separated out on a cathode, and CO is generated on an anode2The anode gas mainly emits atmospheric pollutants such as hydrogen fluoride, fluoride and dust, and the gases and the anode gas are collectively called as electrolysis flue gas. The electrolytic flue gas which is diffused in an electrolytic workshop deteriorates the labor condition and seriously affects the health of production workers, and simultaneously, fluoride in the electrolytic flue gas is also an important raw material for electrolytic production and has great economic value for recycling, so the gases can be discharged into the atmosphere only after being purified, and a flue gas purification system becomes a necessary configuration in the aluminum electrolysis industry.
The domestic electrolysis flue gas purification system basically adopts a low-pressure back-blowing bag-type dust collector or a low-pressure pulse bag-type dust collector, and the basic process flow of the purification technology can be roughly summarized into two types, namely a first type: fresh alumina and fluorine-carrying alumina are added into the reactor at the same time, and the fluorine-carrying alumina after the reaction is carried out gas-solid separation through a cloth bag; and the second method comprises the following steps: adding the recycled fluorine-carrying alumina into the upstream pipeline of the reactor, directly adding fresh alumina into the reactor, reacting, feeding into a filter, and performing gas-solid separation through a filter bag, wherein the filter bag is generally a cloth bag.
However, no matter which traditional electrolytic aluminum flue gas dry purification process flow is adopted, the essential characteristic is that the fresh alumina and the fluorine-carrying alumina enter the bag-type dust remover together after completing the adsorption reaction. However, the process flow of simultaneously entering the dust remover for gas-solid separation after adsorption reaction of fresh alumina and fluorine-carrying alumina is adopted not only increases the operation load of the dust remover and increases the power consumption of the system, but also cannot fully utilize different reaction characteristics of the fresh alumina and the fluorine-carrying alumina, thus leading to low purification efficiency.
Therefore, how to develop a dust removal purification device capable of improving the flue gas purification efficiency is a technical problem to be solved in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flue gas dust removal purification device to solve the problem that purification efficiency is low because of fresh alumina accomplishes the adsorption reaction with carrying fluorine alumina and is caused by flue gas purification device together among the prior art.
The utility model discloses a flue gas dust removal purification device adopts following technical scheme:
a flue gas dust removal and purification device, which comprises a box body and a conveying flue positioned below the box body, the box body is divided into an upper box body and a middle box body which is used for containing alumina and flue gas to enable the alumina and the flue gas to react, a cloth bag dust removal mechanism for gas-solid separation is arranged between the upper box body and the middle box body, an adding port for adding alumina is arranged on the middle box body, the upper box body is provided with an exhaust port, and also comprises a cyclone separator with a gas-solid mixing inlet, a gas outlet and a solid outlet, wherein a gas-solid mixing inlet of the cyclone separator is communicated with the conveying flue, a gas outlet is communicated with the middle box body, the lower end of the middle box body is provided with a material returning pipe communicated with a gas-solid mixing inlet of the cyclone separator, and fluorine-carrying alumina generated by reaction in the middle box body enters the cyclone separator from the return pipe to react with the flue gas again, is separated and is discharged from the solid discharge port.
The lower end of the middle box body is provided with a hopper for collecting fluorine-carrying alumina generated by reaction, the return pipe is arranged at the lower end of the hopper, a gas outlet of the cyclone separator is connected with the hopper, and the adding port is also arranged on the hopper.
A conical flue gas ascending pipe is arranged between the gas-solid mixing inlet of the cyclone separator and the conveying flue, the small end of the flue gas ascending pipe is connected with the gas-solid mixing inlet of the cyclone separator, the large end of the flue gas ascending pipe is connected with the conveying flue, and the return pipe is communicated with the flue gas ascending pipe, so that fluorine-carrying alumina conveyed by the return pipe is mixed with flue gas before entering the gas-solid mixing inlet.
And a solid discharge port of the cyclone separator is provided with a return chute for conveying the discharged fluorine-carrying alumina.
And an air stripping machine for conveying the alumina powder is arranged at the adding port.
The cloth bag dust removing mechanism comprises a pore plate for separating the upper box body and the middle box body, and a cloth bag for gas-solid separation and a framework for fixing the cloth bag are arranged on the pore plate.
The conveying flue is provided with two flue gas inlets which are respectively arranged at two ends of the conveying flue so as to ensure that the airflow is uniformly distributed.
The utility model has the advantages that: the utility model discloses in fresh aluminium oxide and the flue gas reaction in well box, the load fluorine aluminium oxide that generates continues to react with the flue gas in another environment cyclone promptly, make the flue gas adsorb through twice reaction altogether, abundant utilization the adsorption performance of the aluminium oxide of different constitutions, and load fluorine aluminium oxide can be gone out by effectual separation, no longer mix with fresh aluminium oxide, this is just by a wide margin the operation load that has alleviateed sack dust removal mechanism, the consumption of operation power has been reduced, the purification efficiency of flue gas has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a front view of a flue gas dust-removing and purifying device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a corresponding left side view of FIG. 1;
FIG. 3 is a perspective view (partial) of a specific embodiment of the flue gas dust-removing and purifying device of the present invention;
FIG. 4 is a schematic structural view of a bag-type dust removal mechanism;
in the figure: 1. a conveying flue; 2. a flue gas riser; 3. a cyclone separator; 4. a hopper; 5. a middle box body; 51. a cloth bag; 52. an orifice plate; 6. an upper box body; 7. an intermediate flue outlet; 8. a blowing header pipe; 81. a blowing pipe; 9. returning to the chute; 10. a material returning pipe; 11. a gas stripping machine; 12. a distributing chute.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the flue gas dust removal and purification device of the utility model, as shown in figures 1 to 3, the flue gas dust removal and purification device comprises a box body and a conveying flue 1 positioned below the box body, the box body is divided into an upper box body 6 and a middle box body 5 for containing alumina and flue gas to enable the alumina and the flue gas to react, a cloth bag dust removal mechanism for gas-solid separation is arranged between the upper box body 6 and the middle box body 5, an adding port for adding alumina is arranged on the middle box body 5, an exhaust port is arranged on the upper box body 6, the exhaust port can be arranged on the different side walls or the top wall of the upper box body 6 according to the actual construction requirements, the flue gas dust removal and purification device also comprises a cyclone separator 3 with a gas-solid mixing inlet, a gas exhaust port and a solid exhaust port, wherein the gas-solid mixing inlet of the cyclone separator 3 is communicated with the conveying flue 1, the gas exhaust port is communicated with the middle box body 5, the fluorine-carrying alumina generated by the reaction in the middle box body 5 enters the cyclone separator 3 from the return pipe 10 to react with the flue gas again, and is separated and discharged from the solid discharge port.
In this embodiment, the lower end of the middle box 5 is provided with a hopper 4 for collecting fluorine-carrying alumina generated by the reaction, the hopper 4 is in a cone shape with a large upper part and a small lower part, the return pipe 10 is arranged at the lower end of the hopper 4, the gas outlet of the cyclone 3 is connected with the hopper 4, and the adding port is also arranged on the hopper 4.
In other embodiments, the lower end of the middle box body is not provided with a hopper, the adding port and the gas outlet are directly arranged at the lower part of the middle box body, and the return pipe is in a conical shape which is arranged at the lower end of the middle box body and is matched with the middle box body and has a large upper part and a small lower part, so that the requirement of collecting fluorine-carrying alumina generated by reaction is met.
In this embodiment, a conical flue gas rising pipe 2 is arranged between the gas-solid mixing inlet of the cyclone separator 3 and the conveying flue 1, the small end of the flue gas rising pipe 2 is connected with the gas-solid mixing inlet of the cyclone separator 3, the large end of the flue gas rising pipe is connected with the conveying flue 1, and the return pipe 10 is communicated with the flue gas rising pipe 2, so that the fluorine-carrying alumina conveyed by the return pipe 10 is mixed with the flue gas before entering the gas-solid mixing inlet.
In other embodiments, the gas-solid mixing inlet of the cyclone separator can be directly extended into a cone shape without arranging a flue gas ascending pipe, and then the cone-shaped gas-solid mixing inlet is directly connected with the conveying flue, and the return pipe is connected to the extended part of the gas-solid mixing inlet.
In this embodiment, a return chute 9 for transporting the discharged alumina fluoride is provided at the solids discharge outlet of the cyclone 3, the return chute 9 being connected to a storage bin for storing the alumina fluoride, the return chute 9 being of an elongated trough configuration and having a slope to facilitate the transport of the alumina fluoride.
In other embodiments, other conveying mechanisms such as a conveyor belt can be used.
In the embodiment, an adding port is provided with an air stripping machine 11 for conveying alumina powder, and a material distribution chute 12 is installed for the air stripping machine 11 in a matching way, wherein the air stripping machine 11 is common conventional equipment; in other embodiments, other forms of powder feed mechanisms may be used.
In this embodiment, the cloth bag dust removing mechanism includes a hole plate 52 for separating the upper box 6 and the middle box 5, and the hole plate 52 is provided with a cloth bag 51 for gas-solid separation and a framework for fixing the cloth bag 51, which extend downwards into the middle box 5.
An injection pipe 81 for injecting the cloth bag 51 is arranged in the upper box body 6, the injection pipe 81 extends out of the upper box body 6 and is communicated with an injection main pipe 8 through an electromagnetic pulse valve, the injection main pipe 8 is connected with a gas bag for supplying high-pressure gas, an exhaust port of the upper box body 6 is communicated with a middle flue outlet 7 through an exhaust valve, and the middle flue outlet 7 is communicated with a chimney through a fan.
In this embodiment, conveying flue 1 is equipped with two flue gas inlets to thereby two flue gas inlets are located the both ends of conveying flue 1 respectively and make air current distribution even, and is concrete, and conveying flue 1 is hollow cuboid structure, and two open ends of hollow cuboid structure are flue gas inlet, and flue gas tedge 2 is connected on conveying flue 1's up end.
In this embodiment, the box bodies are provided with two rows, the box bodies in each row correspond to each other one by one, the box bodies in the two rows share one conveying flue 1 and one exhaust flue, and each two box bodies share one cyclone separator 3.
When the device is used specifically, flue gas generated in an electrolytic aluminum workshop enters the middle box body 5 after passing through the flue gas ascending pipe 2 and the cyclone separator 3 from the conveying flue 1, fresh alumina powder is simultaneously conveyed into the middle box body 5 by the air stripping machine 11, the fresh alumina powder and the flue gas are subjected to primary reaction and adsorption to form fluorine-carrying alumina, the fluorine-carrying alumina falls into the hopper 4, the fluorine-carrying alumina is conveyed into the flue gas ascending pipe 2 by the return pipe 10 to be mixed with unreacted flue gas again for secondary reaction, finally, under the separation of the cyclone separator 3, the fluorine-carrying alumina after the secondary reaction is discharged from the solid discharge port to the return chute 9 and conveyed into the storage bin, does not enter the middle box body 5 again, and is not filtered by the cloth bag dust removing mechanism any more, the load of the cloth bag dust removing mechanism is reduced, and the power consumption of the cyclone separator 3 is relatively less compared with that of the cloth bag dust, the power consumption of the whole device is reduced.
The utility model discloses in fresh aluminium oxide and in 5 box and flue gas reactions of well box, the load fluorine aluminium oxide that generates continues to react with the flue gas in another environment is flue gas tedge 2 and cyclone 3, make the flue gas adsorb through twice reaction altogether, abundant utilization the adsorption efficiency of the aluminium oxide of different constitutions, and load fluorine aluminium oxide can be gone out by effectual separation, no longer mix with fresh aluminium oxide, this is just by a wide margin the operation load of having alleviateed sack dust removal mechanism, the consumption of operation power has been reduced, the purification efficiency of flue gas has been improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a flue gas dust removal purifier which characterized in that: comprises a box body and a conveying flue positioned below the box body, the box body is divided into an upper box body and a middle box body used for containing alumina and flue gas so as to enable the alumina and the flue gas to react, a cloth bag dust removal mechanism for gas-solid separation is arranged between the upper box body and the middle box body, an exhaust port is arranged on the upper box body, the middle box body is provided with an adding port for adding alumina, and also comprises a cyclone separator with a gas-solid mixing inlet, a gas outlet and a solid outlet, wherein a gas-solid mixing inlet of the cyclone separator is communicated with the conveying flue, a gas outlet is communicated with the middle box body, the lower end of the middle box body is provided with a material returning pipe communicated with a gas-solid mixing inlet of the cyclone separator, and fluorine-carrying alumina generated by reaction in the middle box body enters the cyclone separator from the return pipe to react with the flue gas again, is separated and is discharged from the solid discharge port.
2. The flue gas dedusting and purifying device according to claim 1, characterized in that: the lower end of the middle box body is provided with a hopper for collecting fluorine-carrying alumina generated by reaction, the return pipe is arranged at the lower end of the hopper, a gas outlet of the cyclone separator is connected with the hopper, and the adding port is also arranged on the hopper.
3. The flue gas dedusting and purifying device according to claim 2, characterized in that: a conical flue gas ascending pipe is arranged between the gas-solid mixing inlet of the cyclone separator and the conveying flue, the small end of the flue gas ascending pipe is connected with the gas-solid mixing inlet of the cyclone separator, the large end of the flue gas ascending pipe is connected with the conveying flue, and the return pipe is communicated with the flue gas ascending pipe, so that fluorine-carrying alumina conveyed by the return pipe is mixed with flue gas before entering the gas-solid mixing inlet.
4. A flue gas dust removal purification device according to claim 1, 2 or 3, wherein: and a solid discharge port of the cyclone separator is provided with a return chute for conveying the discharged fluorine-carrying alumina.
5. The flue gas dedusting and purifying device according to claim 4, characterized in that: and an air stripping machine for conveying the alumina powder is arranged at the adding port.
6. The flue gas dedusting and purifying device according to claim 1, characterized in that: the cloth bag dust removing mechanism comprises a pore plate for separating the upper box body and the middle box body, and a cloth bag for gas-solid separation and a framework for fixing the cloth bag are arranged on the pore plate.
7. The flue gas dedusting and purifying device according to claim 1 or 6, characterized in that: the conveying flue is provided with two flue gas inlets which are respectively arranged at two ends of the conveying flue so as to ensure that the airflow is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020827468.9U CN212757918U (en) | 2020-05-18 | 2020-05-18 | Flue gas dust removal and purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020827468.9U CN212757918U (en) | 2020-05-18 | 2020-05-18 | Flue gas dust removal and purification device |
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| Publication Number | Publication Date |
|---|---|
| CN212757918U true CN212757918U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020827468.9U Active CN212757918U (en) | 2020-05-18 | 2020-05-18 | Flue gas dust removal and purification device |
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|---|---|
| CN (1) | CN212757918U (en) |
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- 2020-05-18 CN CN202020827468.9U patent/CN212757918U/en active Active
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