Aluminum electrolysis waste gas purification device

Abstract

The aluminum electrolysis waste gas purification device comprises a purification barrel, a gas inlet pipe is installed on the surface of the purification barrel, a liquid conveying pipe is fixedly installed on the side wall of one side of the purification barrel, the top end of the liquid conveying pipe is fixedly connected with a storage box, and desulfurization liquid is contained in the storage box; a driving motor is mounted on the bottom surface of the purification barrel, a transmission shaft is connected to the surface of the driving motor and connected with a stirring shaft, the stirring shaft is located in the purification barrel, a stirring frame is fixedly connected to the side wall of the stirring shaft, and stirring blades are fixedly connected to the surface of the stirring frame; a liquid outlet is fixedly formed in the bottom surface of the other side of the purification barrel; a first filtering sheet is fixedly mounted on the inner wall of the purifying barrel. The device has the beneficial effects of reasonable structural design, convenience in operation, simple and convenient purification process, low processing and manufacturing cost, good purification effect, higher safety and reliability in purification, high purification effect, safety and environment friendliness.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum electrolysis production equipment, concretely is a kind of aluminum electrolysis waste gas purification device. BACKGROUND

[0002] Aluminum electrolysis is the aluminum obtained by electrolysis, and modern aluminum electrolysis industry production adopts cryolite-alumina molten salt electrolysis method. The molten cryolite is a solvent, alumina is a solute, carbon body is an anode, and aluminum liquid is a cathode. After strong direct current is input, electrochemical reaction is carried out at 950 DEG C to 970 DEG C on the two poles in the electrolytic cell. The cathode product is aluminum liquid, which is extracted from the cell by vacuum ladle and sent to the casting workshop. After purification and clarification in the holding furnace, it is poured into aluminum ingots or directly processed into wire blanks and profiles. The anode product is mainly carbon dioxide and carbon monoxide gas, which contains a certain amount of hydrogen fluoride and sulfide harmful gas and solid dust. In order to protect the environment and human health, the anode gas needs to be purified and treated, and the harmful gas and dust are removed before being discharged into the atmosphere.

[0003] At present, some waste gas purification systems have large floor area, low overall efficiency of system operation and high operation cost. Some integrated aluminum electrolysis waste gas purification devices have small floor area, but the device uses the method of spraying desulfurizing agent to purify waste gas, which cannot fully and quickly purify waste gas.

[0004] Therefore, it is necessary to design a purification device that can solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an aluminum electrolysis waste gas purification device with reasonable structure design, convenient operation, simple purification process, low processing and manufacturing cost, good purification effect, safe and reliable purification, high purification effect and safety and environmental protection.

[0006] The utility model relates to an aluminum electrolysis waste gas purification device, which comprises a purification barrel, an air inlet pipe is installed on the surface of the purification barrel, a liquid infusion pipe is fixedly installed on one side wall of the purification barrel, a storage tank is fixedly connected to the top end of the liquid infusion pipe, and desulfurizing liquid is contained in the storage tank; a driving motor is installed on the bottom surface of the purification barrel, a transmission shaft is connected to the surface of the driving motor, a stirring shaft is connected to the transmission shaft, the stirring shaft is located in the purification barrel, a stirring frame is fixedly connected to the side wall of the stirring shaft, and stirring blades are fixedly connected to the surface of the stirring frame; a liquid outlet is fixedly installed on the other side bottom surface of the purification barrel; and a first filter plate is fixedly installed on the inner wall of the purification barrel.

[0007] The first filter is arranged to purify the aluminum electrolysis waste gas entering through the air inlet pipe, and the dust in the waste gas can be filtered out to achieve the purpose of primary purification; the storage tank is arranged, the desulfurization liquid in the storage tank can be mixed with the aluminum electrolysis waste gas entering through the air inlet pipe, and the harmful gas generated in the electrolysis process can be effectively captured and neutralized to reduce environmental pollution and remove harmful substances in the waste gas, and finally the desulfurization waste water is discharged through the liquid outlet; the desulfurization liquid is stored in the special storage tank, and when used, it can enter the purification barrel through the liquid conveying pipe, so that the continuous supply of desulfurization liquid can be fully guaranteed, the desulfurization liquid cannot react with the filtering assembly in the purification barrel, and the mixed waste gas after purification can be prevented, so that the operation is more scientific and reasonable.

[0008] The number of the stirring blades is four, two of which are arranged on the side wall of the stirring shaft, and the other two are arranged on the surface of the stirring frame and flush with the edge of the stirring frame.

[0009] The driving motor drives the transmission shaft and the stirring shaft, the stirring shaft drives the stirring frame and the stirring blades on the surface of the stirring frame, and the rotation of the stirring blades accelerates the purification process of the desulfurization liquid and the filtered gas in the purification barrel, so that the mixture of the filtered gas and the desulfurization liquid is more uniform, the purification efficiency is improved, and the purification is more thorough.

[0010] The second filter is fixedly installed on the inner wall of the purification barrel and arranged below the first filter.

[0011] The second filter can filter out fluorides in the waste gas, further improve the purification degree of the waste gas, and make the waste gas purification more comprehensive.

[0012] The isolation plate is installed on the inner wall of the purification barrel and arranged below the second filter, the air suction fan is fixedly installed on the isolation plate, the air suction fan is fixedly connected with the gas conveying pipe, the top end of the gas conveying pipe is fixedly installed on the bottom surface of the isolation plate, the bottom end of the gas conveying pipe extends into the cavity formed by the stirring blades, and the first anti-seepage net is installed at the bottom end of the gas conveying pipe.

[0013] The gas conveying pipe can quickly suck the filtered gas into the gas conveying pipe through the air suction fan, and then the filtered gas enters the stirring assembly through the first anti-seepage net at the other end of the gas conveying pipe, so as to provide a conveying path for the flow of waste gas, make the aggregation of waste gas more concentrated, and improve the efficiency of waste gas purification.

[0014] The bottom surface of the isolation plate is provided with a measuring head.

[0015] The measuring head can monitor the purified waste gas, so that the operator can check whether the purified waste gas meets the purification standard in time, and provides a reference for the purification of waste gas.

[0016] The side wall of the purification barrel is fixedly connected with an exhaust pipe, an exhaust valve is installed on the exhaust pipe, and a second anti-seepage net is installed at the pipe opening of the exhaust pipe.

[0017] The exhaust pipe is arranged, the exhaust valve is opened when the gas detected by the measuring head reaches the emission standard, and the purified gas reaching the emission standard is discharged through the exhaust pipe.

[0018] The storage box is fixedly installed on the side wall of the storage box through the support.

[0019] The infusion valve is arranged on the infusion pipe.

[0020] The utility model discloses beneficial effects:

[0021] 1) the first filter piece is arranged, the aluminum electrolysis waste gas that enters through the air inlet pipe can be purified, the dust in the waste gas can be filtered out, the purpose of primary purification is achieved, the storage box is arranged, the desulfurization liquid in the storage box can be mixed with the aluminum electrolysis waste gas that enters through the air inlet pipe, harmful gases generated in the electrolysis process can be effectively captured and neutralized, environmental pollution is reduced, the function of removing harmful substances in the waste gas is achieved, and the desulfurization waste water formed finally is discharged through the liquid outlet, the desulfurization liquid is stored through the special storage box, can enter the purification barrel through the infusion pipe when using, the continuous supply of the desulfurization liquid can be fully ensured, the desulfurization liquid and the filtering assembly in the purification barrel cannot react, the purified waste gas and the un-purified waste gas can be prevented from mixing, and the operation is more scientific and reasonable.

[0022] 2) the driving motor drives the transmission shaft and the stirring shaft, the stirring shaft drives the stirring frame and the stirring blades located on the surface of the stirring frame, the stirring blades rotate to accelerate the purification process of the desulfurization liquid and the filtered gas in the purification barrel, the mixture of the filtered gas and the desulfurization liquid can be more uniform, the purification efficiency is improved, and the purification is more thorough.

[0023] 3) the second filter piece is arranged, the fluorides in the waste gas can be filtered out, and the purification degree of the waste gas is further improved, so that the waste gas purification is more comprehensive.

[0024] 4) the gas inlet pipe is arranged, the filtered gas is quickly sucked into the gas inlet pipe by the suction fan, then enters the stirring assembly through the first anti-seepage net at the other end of the gas inlet pipe, a conveying path is provided for the flow of the waste gas, the aggregation of the waste gas is more concentrated, and the waste gas purification efficiency is improved.

[0025] 5) the measuring head is arranged, the purified waste gas can be monitored, the operator can check whether the purified waste gas reaches the purification standard in time, and a reference is provided for the purification of the waste gas.

[0026] 6) The exhaust pipe is arranged, the exhaust valve is opened when the gas detected by the measuring head reaches the emission standard, and the purified gas reaching the emission standard is discharged through the exhaust pipe.

[0027] 7) The purification device has reasonable structure design, convenient operation, simple purification process, low processing and manufacturing cost, good purification effect, safe and reliable purification, high purification effect, safety and environmental protection, and is worth wide promotion and application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the utility model;

[0029] Figure 2 It is a right view of the utility model;

[0030] Figure 3 It is a top view of the utility model;

[0031] Figure 4 It is Figure 3 It is a sectional view of A-A in the utility model;

[0032] Figure 5 It is a structure schematic view of the isolation plate and other components in the utility model.

[0033] In the drawing: 1, purification barrel; 2, air inlet pipe; 3, desulfurization liquid; 4, liquid discharge port; 5, driving motor; 6, transmission shaft; 7, first filter sheet; 8, second filter sheet; 9, isolation plate; 10, air suction fan; 11, air conveying pipe; 12, first anti-seepage net; 13, stirring shaft; 14, stirring frame; 15, stirring blade; 16, support; 17, storage box; 18, liquid conveying pipe; 19, liquid conveying valve; 20, measuring head; 21, exhaust pipe; 22, second anti-seepage net; 23, exhaust valve. DETAILED DESCRIPTION

[0034] Example 1.

[0035] The following will be combined with the attached Figures 1-5 The utility model is further explained.

[0036] The utility model discloses a purification bucket 1, air inlet pipe 2, desulfurization liquid 3, liquid outlet 4, drive motor 5, transmission shaft 6, first filter piece 7, stirring shaft 13, stirring frame 14, stirring vane 15, support 16, storage box 17, infusion tube 18, infusion valve 19, measuring head 20, exhaust pipe 21, second anti -infiltration net 22, exhaust valve 23, purification bucket 1, the surface of purification bucket 1 is installed with air inlet pipe 2, and one side wall of purification bucket 1 is fixedly installed with infusion tube 18, and the top of infusion tube 18 is fixedly connected with storage box 17, and storage box 17 is filled with desulfurization liquid 3, the bottom surface of purification bucket 1 is installed with drive motor 5, and drive motor 5 surface is connected with transmission shaft 6, and transmission shaft 6 is connected with stirring shaft 13, and stirring shaft 13 is located in purification bucket 1, and the side wall of stirring shaft 13 is fixedly connected with stirring frame 14, and the surface of stirring frame 14 is fixedly connected with stirring vane 15, and the bottom surface of the other side of purification bucket 1 is fixedly installed with liquid outlet 4, and the inner wall of purification bucket 1 is fixedly installed with first filter piece 7.

[0037] The number of stirring vane 15 is four, and two stirring vanes 15 are arranged on the side wall of stirring shaft 13.

[0038] The side wall of purification bucket 1 is fixedly connected with exhaust pipe 21, exhaust valve 23 is installed on exhaust pipe 21, and second anti -infiltration net 22 is installed on the pipe opening of exhaust pipe 21.

[0039] The storage box 17 is fixedly installed on the side wall of storage box 17 through support 16.

[0040] The infusion tube 18 is provided with infusion valve 19.

[0041] The first filter piece 7 is made of sintered plate of 5 layers of staggered superposition of dense preparation of stainless steel wire, and the filter pore size is 2 microns, carries out primary filtration to waste gas, and mainly filters dust.

[0042] Use method: the aluminum electrolysis waste gas enters into the purification bucket 1 through the air inlet pipe 2, the dust in the waste gas can be filtered out through the first filter sheet 7, the purpose of primary purification is achieved, at the same time, the desulfurization liquid 3 stored in the storage box 17 can enter into the purification bucket 1 through the infusion pipe 18 by opening the infusion valve 19, the output shaft of the driving motor 5 is driven to rotate, the driving motor 5 drives the transmission shaft 6 fixedly connected with the output shaft of the driving motor 5 to rotate, thereby driving the stirring shaft 13 fixedly connected with the transmission shaft 6 to rotate, the stirring shaft 13 drives the stirring frame 14 fixedly connected with the stirring shaft 13 to rotate, thereby driving the stirring blade 15 fixedly connected with the stirring frame 14 to rotate, the stirring blade 15 drives the desulfurization liquid 3 and the filtered gas in the purification bucket 1 to accelerate the purification process, the gas meeting the emission standard after purification is discharged through the exhaust pipe 21 by opening the exhaust valve 23, and the desulfurization liquid 3 and the desulfurization wastewater that cannot react any more are discharged through the liquid outlet 4.

[0043] Example 2.

[0044] The utility model discloses a purification bucket 1, air inlet pipe 2, desulfurization liquid 3, liquid outlet 4, driving motor 5, transmission shaft 6, first filter sheet 7, second filter sheet 8, isolation board 9, suction fan 10, gas pipe 11, first anti -infiltration network 12, stirring shaft 13, stirring frame 14, stirring blade 15, support 16, storage box 17, infusion pipe 18, infusion valve 19, measuring head 20, exhaust pipe 21, second anti -infiltration network 22, exhaust valve 23, purification bucket 1, the surface of purification bucket 1 is equipped with air inlet pipe 2, one side wall of purification bucket 1 is equipped with infusion pipe 18 and is fixed, the top of infusion pipe 18 is fixedly connected with storage box 17, and storage box 17 contains desulfurization liquid 3, the bottom surface of purification bucket 1 is equipped with driving motor 5, and driving motor 5 surface is connected with transmission shaft 6, and transmission shaft 6 is connected with stirring shaft 13, and stirring shaft 13 is located in purification bucket 1, and the side wall of stirring shaft 13 is fixedly connected with stirring frame 14, and the surface of stirring frame 14 is fixedly connected with stirring blade 15, the other side bottom surface of purification bucket 1 is fixedly installed with liquid outlet 4, and the inner wall of purification bucket 1 is fixedly installed with first filter sheet 7.

[0045] The number of stirring blades 15 is four, two stirring blades 15 are arranged on the side wall of the stirring shaft 13, and the other two stirring blades 15 are arranged on the surface of the stirring frame 14 and are flush with the edge of the stirring frame 14.

[0046] The side wall of the purification bucket 1 is fixedly connected with the exhaust pipe 21, the exhaust valve 23 is arranged on the exhaust pipe 21, and the second anti-infiltration network 20 is arranged on the pipe opening of the exhaust pipe 21.

[0047] The inner wall of the purification bucket 1 is fixedly installed with the second filter sheet 8, and the second filter sheet 8 is arranged below the first filter sheet 7.

[0048] The inner wall of the purification bucket 1 is provided with a partition plate 9, which is below the second filter sheet 8, and the partition plate 9 is fixedly provided with an air suction fan 10, and the lower end of the air suction fan 10 is fixedly connected with a gas conveying pipe 11, the top end of the gas conveying pipe 11 is fixedly installed on the bottom surface of the partition plate 9, the bottom end of the gas conveying pipe 11 extends into the cavity formed by the stirring blade 15, and the bottom end of the gas conveying pipe 11 is provided with a first anti-seepage net 12.

[0049] The bottom surface of the partition plate 9 is provided with a measuring head 20.

[0050] The storage box 17 is fixedly installed on the side wall of the storage box 17 through the support 16.

[0051] The infusion pipe 18 is provided with an infusion valve 19.

[0052] The first filter sheet 7 is made of a sintered plate with 5 layers of interlaced superposition of dense stainless steel wires, and the filter pore size is 2 microns, which can perform primary filtration on the waste gas and mainly filter dust.

[0053] The second filter sheet 8 is made of a sintered plate with 5 layers of interlaced superposition of dense stainless steel wires, and the filter pore size is 1 micron, which can perform secondary filtration on the fluorine-containing dust in the waste gas.

[0054] The model of the measuring head 20 is AW-C6.

[0055] The use method is as follows: the aluminum electrolysis waste gas enters into the purification bucket 1 through the air inlet pipe 2, and the dust in the waste gas can be filtered out through the first filter sheet 7, so as to achieve the purpose of primary purification, and the fluorides in the waste gas can be filtered out through the second filter sheet 8, so as to further improve the purification degree of the waste gas and make the waste gas purification more comprehensive, the filtered gas is quickly sucked into the gas conveying pipe 11 by the air suction fan 10, and then enters into the stirring assembly through the first anti-seepage net 12 at the other end of the gas conveying pipe 11, at the same time, the infusion valve 19 is opened, the desulfurization liquid 3 stored in the storage box 17 can enter into the purification bucket 1 through the infusion pipe 18, the driving motor 5 is started, the output shaft of the driving motor 5 rotates, the output shaft of the driving motor 5 drives the transmission shaft 6 fixedly connected with the output shaft of the driving motor 5 to rotate, so as to drive the stirring shaft 13 fixedly connected with the transmission shaft 6 to rotate, the stirring shaft 13 drives the stirring frame 14 fixedly connected with the stirring shaft 13 to rotate, so as to drive the stirring blade 15 fixedly connected with the stirring frame 14 to rotate, and the stirring blade 15 drives the desulfurization liquid 3 and the filtered gas in the purification bucket 1 to accelerate the purification process, when the gas detected by the measuring head 20 reaches the emission standard, the exhaust valve 23 is opened, the gas after purification and reaching the emission standard is discharged through the exhaust pipe 21, and the desulfurization liquid 3 and the desulfurization wastewater which cannot react any more are discharged through the liquid outlet 4.

Claims

1. An aluminum electrolysis off-gas purification device, comprising a purification bucket (1), a gas inlet pipe (2) is mounted on the surface of the purification bucket (1), characterized in that: The side wall of the purification bucket (1) is fixedly installed with a liquid delivery pipe (18), the top end of the liquid delivery pipe (18) is fixedly connected with a storage box (17), and the storage box (17) is filled with desulfurization liquid (3); the bottom surface of the purification bucket (1) is installed with a driving motor (5), the surface of the driving motor (5) is connected with a transmission shaft (6), the transmission shaft (6) is connected with a stirring shaft (13), the stirring shaft (13) is located in the purification bucket (1), the side wall of the stirring shaft (13) is fixedly connected with a stirring frame (14), and the surface of the stirring frame (14) is fixedly connected with stirring blades (15); the other side bottom surface of the purification bucket (1) is fixedly installed with a liquid discharge port (4); and the inner wall of the purification bucket (1) is fixedly installed with a first filter piece (7).

2. An aluminum electrolysis offgas scrubbing device as claimed in claim 1, characterized in that: The number of the stirring blades (15) is four, two stirring blades (15) are arranged on the side wall of the stirring shaft (13); and two stirring blades (15) are arranged on the surface of the stirring frame (14) and are flush with the edge of the stirring frame (14).

3. An aluminium electrolysis offgas cleaning device according to claim 2, characterized in that: The inner wall of the purification bucket (1) is fixedly installed with a second filter piece (8), and the second filter piece (8) is arranged below the first filter piece (7).

4. An aluminium electrolysis offgas cleaning device according to claim 3, characterized in that: The inner wall of the purification bucket (1) is installed with a partition plate (9), the partition plate (9) is arranged below the second filter piece (8), the partition plate (9) is fixedly installed with a suction fan (10), the lower end of the suction fan (10) is fixedly connected with a gas delivery pipe (11), the top end of the gas delivery pipe (11) is fixedly installed on the bottom surface of the partition plate (9), the bottom end of the gas delivery pipe (11) extends into a cavity formed by the stirring blades (15), and the bottom end of the gas delivery pipe (11) is installed with a first anti-seepage net (12).

5. An aluminium electrolysis offgas cleaning device according to claim 4, characterized in that: The bottom surface of the partition plate (9) is installed with a measuring head (20).

6. An aluminium electrolysis offgas cleaning device according to claim 5, characterized in that: The side wall of the purification bucket (1) is fixedly connected with an exhaust pipe (21), the exhaust pipe (21) is installed with an exhaust valve (23), and the pipe opening of the exhaust pipe (21) is installed with a second anti-seepage net (22).

7. An aluminium electrolysis offgas cleaning device according to claim 6, characterized in that: The storage box (17) is fixedly installed on the side wall of the storage box (17) through a support (16).

8. An aluminium electrolysis offgas cleaning device according to claim 7, characterized in that: The liquid delivery pipe (18) is provided with a liquid valve (19).

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