Dust collecting device

Abstract

The utility model provides a dust collection device which comprises a dust collection cover assembly and a purification assembly, and the dust collection cover assembly comprises a fixed cover, a movable cover and a lifting mechanism; the fixed cover is fixedly arranged on a girder of the crown block and is provided with an exhaust flue; the movable cover is movably arranged on the lower side of the fixed cover; the lifting mechanism is connected with the movable cover to drive the movable cover to move up and down; the purification assembly comprises a dust remover; the dust remover is provided with a smoke inlet flue, and the smoke inlet flue is communicated with the exhaust flue. When anode changing operation is carried out, the lifting mechanism drives the movable cover to move downwards, when the movable cover moves to the lowest position, a chamber and an anode of an electrolytic cell can be completely covered, smoke dust and harmful gas are collected, the collected smoke dust and harmful gas enter the dust remover through the exhaust flue and the smoke inlet flue to be purified, and effective treatment is achieved. The electrolytic aluminum anode replacement device can solve the problems that a large amount of smoke dust and harmful gas are generated during electrolytic aluminum anode replacement, the working environment of an electrolytic aluminum workshop is seriously polluted, and the body health of workshop workers is harmed.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum smelting auxiliary equipment, and in particular to a dust collecting device. Background Art

[0002] At present, the production of electrolytic aluminum usually adopts the cryolite-alumina molten salt electrolysis method. Specifically, molten cryolite and alumina are used as solvent and solute respectively, and carbonite is used as anode and aluminum liquid is used as cathode. Electricity is applied to high-temperature electrolysis, and electrochemical reactions occur on the anode and cathode to obtain aluminum.

[0003] During the production of electrolytic aluminum, it is necessary to operate a multifunctional overhead crane to continuously replace anodes. When replacing anodes, the electrolytic cell is opened, and the chamber and anode of the electrolytic cell will produce a large amount of smoke and harmful gases, which seriously pollutes the working environment of the electrolytic aluminum workshop and endangers the health of the workshop workers. Utility Model Content

[0004] The present application provides a dust collecting device, which can solve the problem that a large amount of smoke and harmful gases are generated when replacing anodes in electrolytic aluminum, which seriously pollutes the working environment of the electrolytic aluminum workshop and endangers the health of the workshop workers.

[0005] The present application provides a dust collecting device, comprising:

[0006] The dust collecting hood assembly comprises a fixed hood, a movable hood and a lifting mechanism; the fixed hood is arranged on the beam of the overhead travelling vehicle and has an exhaust flue; the movable hood is movably arranged on the lower side of the fixed hood; the lifting mechanism is connected to the movable hood to drive the movable hood to move up and down;

[0007] The purification component comprises a dust collector; the dust collector has a smoke inlet duct, and the smoke inlet duct is connected with the exhaust duct.

[0008] The solution provided by the embodiment of the present application is that when the anode pole replacement operation is performed, the lifting mechanism drives the movable cover to move downward. When the movable cover moves to the lowest position, it can completely cover the tank chamber and anode of the electrolytic cell, and start to collect smoke and harmful gases. The collected smoke and harmful gases enter the dust collector through the exhaust flue of the fixed cover and the smoke inlet flue of the dust collector and are purified, thereby achieving effective treatment of smoke and harmful gases. It can be seen that this solution can solve the problem of generating a large amount of smoke and harmful gases when replacing the anode of electrolytic aluminum, seriously polluting the working environment of the electrolytic aluminum workshop, and endangering the health of the workshop staff.

[0009] In some possible implementations, the movable cover includes:

[0010] A telescopic bracket, connected to the lifting mechanism, capable of moving up and down under the drive of the lifting mechanism;

[0011] The flexible outer cover is arranged on the telescopic bracket and can be extended or folded along with the up and down movement of the telescopic bracket.

[0012] In combination with the above implementations, in some possible implementations, the flexible outer cover is made of temperature-resistant and wear-resistant flexible fabric.

[0013] In combination with the above implementations, in some possible implementations, the lifting mechanism is any one of a winch, an oil cylinder, an air cylinder, an electric push rod, a ball screw mechanism, and a rack and pinion mechanism.

[0014] In combination with the above implementations, in some possible implementations, the purification component further includes:

[0015] The first material box is connected to the dust collector and is used to provide alumina powder to the dust collector.

[0016] In combination with the above implementations, in some possible implementations, the purification component further includes:

[0017] The second material box is connected to the dust collector and is used to collect fluorine-loaded alumina powder obtained by the reaction of alumina powder and hydrogen fluoride in the hot flue gas of the dust collector.

[0018] In combination with the above implementations, in some possible implementations, running wheels are provided at the bottom of the fixed cover; and the dust collecting cover assembly is movably arranged on the beam of the overhead travelling vehicle via the running wheels.

[0019] In combination with the above implementations, in some possible implementations, the dust collector is disposed inside the fixed cover or outside the fixed cover;

[0020] Wherein, when the dust collector is arranged outside the fixed cover, the smoke inlet duct and the exhaust duct are connected by a flexible pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0022] Figure 1 It is a structural schematic diagram of a dust collecting hood assembly in a dust collecting device provided in an embodiment of the present application;

[0023] Figure 2 yes Figure 1 Schematic diagram of the structure of the purification component in the dust collecting device.

[0024] 100—beam;

[0025] 1—Dust hood assembly;

[0026] 11—fixed cover; 111—exhaust flue; 112—travel wheel;

[0027] 12—movable cover; 121—telescopic bracket; 122—flexible outer cover;

[0028] 2—Purification components;

[0029] 21—dust collector; 211—smoke inlet duct; 212—exhaust duct;

[0030] 22 - first material box;

[0031] 23 - Second material box. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] At present, the production of electrolytic aluminum usually adopts the cryolite-alumina molten salt electrolysis method. Specifically, molten cryolite and alumina are used as solvent and solute respectively, and carbonite is used as anode and aluminum liquid is used as cathode. Electricity is applied to high-temperature electrolysis, and electrochemical reactions occur on the anode and cathode to obtain aluminum.

[0034] During the production of electrolytic aluminum, it is necessary to operate a multifunctional overhead crane to continuously replace anodes. When replacing anodes, the electrolytic cell is opened, and the chamber and anode of the electrolytic cell will produce a large amount of smoke and harmful gases, which seriously pollutes the working environment of the electrolytic aluminum workshop and endangers the health of the workshop workers.

[0035] In order to solve the above technical problems, the embodiment of the present application provides a dust collecting device. The dust collecting device provided in the embodiment of the present application is described in detail below with reference to the drawings in the specification.

[0036] Please refer to Figure 1 and Figure 2 The present application proposes a dust collecting device, comprising a dust collecting hood assembly 1 and a purification assembly 2. The dust collecting hood assembly 1 comprises a fixed hood 11, a movable hood 12 and a lifting mechanism; the fixed hood 11 is fixedly arranged on the beam 100 of the overhead crane, and has an exhaust flue 111; the movable hood 12 is movably arranged on the lower side of the fixed hood 11; the lifting mechanism is connected to the movable hood 12 to drive the movable hood 12 to move up and down; the purification assembly 2 comprises a dust collector 21; the dust collector 21 has a smoke inlet duct 211, and the smoke inlet duct 211 is connected to the exhaust flue 111.

[0037] In the solution provided by the embodiment of the present application, when the anode pole replacement operation is performed, the lifting mechanism drives the movable cover 12 to move downward. When the movable cover 12 moves to the lowest position, it can completely cover the tank chamber and anode of the electrolytic cell, and start to collect smoke and harmful gases. The collected smoke and harmful gases enter the dust collector 21 through the exhaust flue 111 of the fixed cover 11 and the smoke inlet flue 211 of the dust collector 21 and are purified, thereby achieving effective treatment of smoke and harmful gases. It can be seen that this solution can solve the problem of generating a large amount of smoke and harmful gases when replacing the anode of electrolytic aluminum, seriously polluting the working environment of the electrolytic aluminum workshop, and endangering the health of the workshop staff.

[0038] The following combination Figure 1 to Figure 2 The specific structure of the dust collecting device is introduced in detail.

[0039] See also Figure 1 The dust hood assembly 1 includes a fixed hood 11, a movable hood 12 and a lifting mechanism. The fixed hood 11 is arranged on the beam 100 of the overhead crane and has an exhaust flue 111. Traveling wheels 112 may be arranged at the bottom of the fixed hood 11; the dust hood assembly 1 is movably arranged on the beam 100 of the overhead crane through the traveling wheels 112. Among them, the traveling wheels 112 may include a driving wheel and a driven wheel, and the driving wheel is driven by a motor to drive the dust hood assembly 1 to move. Specifically, a guide rail may be installed on the beam 100 of the overhead crane, and the traveling wheels 112 may be installed on the guide rail, so that the traveling wheels 112 and the dust hood assembly 1 can move along the guide rail to a suitable work station as needed.

[0040] The movable cover 12 is movably arranged at the lower side of the fixed cover 11; the lifting mechanism is connected to the movable cover 12 and can drive the movable cover 12 to move up and down. Figure 1, the movable cover 12 may include a telescopic bracket 121 and a flexible outer cover 122. The telescopic bracket 121 is connected to the lifting mechanism, and the flexible outer cover 122 is covered on the telescopic bracket 121. The lifting mechanism may be any one of a winch, a cylinder, an air cylinder, an electric push rod, a ball screw mechanism, and a rack and pinion mechanism. Among them, the winch, the ball screw mechanism, and the rack and pinion mechanism may be driven by a motor, and a stepper motor is preferred in order to achieve precise control. The cylinder, the air cylinder, and the electric push rod are driven by using a corresponding hydraulic system, a pneumatic system, and an external power supply of the circuit. Designers may flexibly design the winch, the cylinder, the air cylinder, the electric push rod, the ball screw mechanism, and the rack and pinion mechanism, and the embodiments of the present application will not be described in detail. When performing the anode pole changing operation, by controlling the lifting mechanism, the lifting mechanism can drive the telescopic bracket 121 to move downward, and at the same time, the flexible outer cover 122 covered on the telescopic bracket 121 can extend with the downward movement of the telescopic bracket 121. After the anode exchange operation is completed and the dust collection operation is completed, the lifting mechanism can be controlled to drive the telescopic bracket 121 to move upward. At the same time, the flexible outer cover 122 covering the telescopic bracket 121 can be folded along with the upward movement of the telescopic bracket 121. Considering various factors such as work reliability, durability, and economy, the flexible outer cover 122 can be made of temperature-resistant and wear-resistant flexible fabric.

[0041] See also Figure 2 , the purification assembly 2 includes a dust collector 21; the dust collector 21 has a smoke inlet duct 211, and the smoke inlet duct 211 is connected to the exhaust duct 111. When the anode pole changing operation is performed, the movable cover 12 moves to the lowest position to completely cover the flue chamber of the electrolytic cell and the smoke and harmful gases collected by the anode. The smoke and harmful gases enter the dust collector 21 through the exhaust duct 111 of the fixed cover 11 and the smoke inlet duct 211 of the dust collector 21 for purification. Among them, the dust collector 21 can adopt a cartridge dust collector 21. Cartridge dust removal is based on surface filtration. After the dust-containing gas enters the dust collector 21, the dust particles can be captured and retained on the surface of the filter cartridge through the fiber structure of the filter cartridge, and the filtered clean gas continues to flow through the filter cartridge and is finally discharged from the dust collector 21. When the dust accumulates on the filter cartridge to a certain value, the filter cartridge is impacted with high-pressure gas, so that the dust on the filter cartridge can be removed and the filtration efficiency of the filter cartridge can be restored. In order to effectively treat harmful gases, in some embodiments of the present application, the purification component 2 may further include a first material box 22, which is connected to the dust collector 21 and is used to provide aluminum oxide powder to the dust collector 21. The aluminum oxide powder can be transported to the dust collector 21 by high-pressure air, and the high-pressure air can be supplied by the air compressor of the aluminum electrolysis workshop. The aluminum oxide powder can react with hydrogen fluoride in the flue gas by adsorption, and the flue gas after the reaction is filtered by the filter cartridge in the filter cartridge type dust collector to form a harmless gas for removing fluorine and dust. Figure 2, harmless air can be discharged into the atmosphere through the exhaust duct 212 by means of a fan or other air-inducing device.

[0042] Considering that the alumina powder will produce fluorine-carrying alumina powder after the adsorption reaction with hydrogen fluoride in the flue gas, if the fluorine-carrying alumina powder in the dust collector 21 is not cleaned in time, it will affect the normal operation of the dust collector 21. Therefore, in some embodiments of the present application, the purification component 2 may also include a second material box 23, which is connected to the dust collector 21 and is used to collect the fluorine-carrying alumina powder obtained after the reaction of the alumina powder with hydrogen fluoride in the hot flue gas of the dust collector 21. Among them, a special pipeline can be set at the bottom of the dust collector 21 to hold the fluorine-carrying alumina powder, and the fluorine-carrying alumina powder is also transported to the second material box 23 by high-pressure air. The fluorine-carrying alumina powder collected by the second material box 23 can be reused, effectively saving production costs.

[0043] It should be noted that the dust collector 21 can be arranged inside the fixed cover 11 or outside the fixed cover 11. When the dust collector 21 is arranged inside the fixed cover 11, the dust collector 21 can move with the dust collecting cover assembly 1, so the smoke inlet duct 211 of the dust collector 21 and the exhaust duct 111 of the fixed cover 11 can be directly connected by a hard pipe. When the dust collector 21 is arranged outside the fixed cover 11, in order to avoid damaging the connecting pipe between the dust collector 21 and the fixed cover 11 when moving the dust collecting cover assembly 1, the smoke inlet duct 211 of the dust collector 21 and the exhaust duct 111 of the fixed cover 11 are at least partially connected by a flexible pipe. In other words, the smoke inlet duct 211 of the dust collector 21 at least partially adopts a flexible pipe, or the exhaust duct 111 of the fixed cover 11 at least partially adopts a flexible pipe, and further, the smoke inlet duct 211 of the dust collector 21 and the exhaust duct 111 of the fixed cover 11 are at least partially connected by a flexible pipe. Among them, flexible pipes can be made of metal bellows, armored rubber pipes, etc., and designers can choose according to actual needs.

[0044] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A dust collecting device, characterized in that: include: A dust collecting hood assembly (1) comprises a fixed hood (11), a movable hood (12) and a lifting mechanism; the fixed hood (11) is arranged on a beam (100) of an overhead crane and has an exhaust flue (111); the movable hood (12) is movably arranged on the lower side of the fixed hood (11); the lifting mechanism is connected to the movable hood (12) to drive the movable hood (12) to move up and down; The purification component (2) comprises a dust collector (21); the dust collector (21) has a smoke inlet duct (211), and the smoke inlet duct (211) is connected to the exhaust duct (111).

2. The dust collecting device according to claim 1, characterized in that: The movable cover (12) comprises: A telescopic bracket (121) is connected to the lifting mechanism and can move up and down under the drive of the lifting mechanism; The flexible outer cover (122) is arranged on the telescopic support (121) and can be extended or folded along with the up and down movement of the telescopic support (121).

3. The dust collecting device according to claim 2, characterized in that: The flexible outer cover (122) is made of temperature-resistant and wear-resistant flexible fabric.

4. The dust collecting device according to claim 1, characterized in that: The lifting mechanism is any one of a winch, an oil cylinder, an air cylinder, an electric push rod, a ball screw mechanism, and a gear rack mechanism.

5. The dust collecting device according to claim 1, characterized in that: The purification component (2) also includes: The first material box (22) is communicated with the dust collector (21) and is used to provide alumina powder to the dust collector (21).

6. The dust collecting device according to claim 5, characterized in that: The purification component (2) also includes: The second material box (23) is connected to the dust collector (21) and is used to collect fluorine-loaded alumina powder obtained by the reaction of alumina powder with hydrogen fluoride in the hot flue gas of the dust collector (21).

7. The dust collecting device according to any one of claims 1 to 6, characterized in that: The bottom of the fixed cover (11) is provided with running wheels (112); the dust collecting cover assembly (1) is movably arranged on the beam (100) of the overhead crane via the running wheels (112).

8. The dust collecting device according to claim 7, characterized in that: The dust collector (21) is arranged inside the fixed cover (11) or outside the fixed cover (11); Wherein, when the dust collector (21) is arranged outside the fixed cover (11), the smoke inlet duct (211) and the exhaust duct (111) are connected by a flexible pipe.

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