CN214612789U

CN214612789U - Fresh alumina flow control device of electrolytic aluminum system

Info

Publication number: CN214612789U
Application number: CN202022881562.5U
Authority: CN
Inventors: 马理思; 徐定孟; 胡鑫; 夏志山; 温绍成; 高俊; 肖啸
Original assignee: Qujing Yunnan Aluminium Yuxin Aluminium Co ltd
Current assignee: Qujing Yunnan Aluminium Yuxin Aluminium Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-11-05
Anticipated expiration: 2030-12-04

Abstract

The utility model discloses a fresh alumina flow control device of electrolytic aluminum system, including aluminium oxide feed unit, VIR reactor unit, the dust remover unit, the lifting machine with carry the fluorine storehouse, aluminium oxide feed unit includes the dispenser, the flowmeter, first feeder pipe and second feeder pipe, the dispenser includes the hopper, the feed cylinder, the feed impeller, driving motor, go up intercommunicating pore and intercommunicating pore down, the flowmeter is installed under on the intercommunicating pore, the second feeder pipe is installed on the flowmeter, the lower extreme of first feeder pipe is installed on VIR reactor unit, install the throttle plate in the first feeder pipe, be provided with the round hole of 4 diameters on the throttle plate, install the stopple in the round hole, first feeder pipe and second feeder pipe are fixed through first flange and second flange joint. This device comes control fresh alumina's flow through chooseing for use different apertures to guarantee 24 hours of dust remover equilibrium area material, ensure hydrogen fluoride discharge to reach standard, super dense phase material supplies to send advantage normal, that equipment operation is stable.

Description

Fresh alumina flow control device of electrolytic aluminum system

Technical Field

The utility model relates to the technical field of electrolytic aluminum production equipment, in particular to a fresh aluminum oxide flow control device of an electrolytic aluminum system.

Background

In the aluminum electrolysis production process, a large amount of harmful gases such as fluoride, alumina dust, sulfur dioxide and the like are continuously emitted from the electrolytic bath, the harmful gases not only cause great harm to human health, but also cause damage to the atmosphere, soil, water quality and animals and plants inside and outside a plant area, and the emission of the harmful gases not only causes serious pollution to the environment, but also wastes a large amount of resources. To avoid contamination, these gases need to be purged and then vented to the atmosphere. At present, the dry purification technology is mainly adopted to purify and recover the aluminum electrolysis flue gas so as to achieve the purposes of turning harm into good and protecting the environment, and through the dry recovery technology, alumina particle materials are added into a flue gas pipeline through a VIR reactor to be used as an adsorbent so as to adsorb pollutants such as HF gas and the like in the flue gas. The adsorption principle is that harmful gas is collected to a main pipe outside a factory building through smoke exhaust branch pipes of each electrolytic cell, then fresh alumina is conveyed to a VIR reactor, the alumina is used for adsorbing harmful substances in the smoke, then the harmful gas and the alumina powder are separated in a dust collector unit, the dust collector unit is formed by arranging a plurality of bag-type dust collectors in parallel, the bag-type dust collectors are used for filtering alumina powder mixed with the smoke, clean air is exhausted into the atmosphere through dust collecting bags, one part of the filtered alumina powder is conveyed to a circulating alumina feeding hole of the VIR reactor through a circulating alumina chute, and the other part of the filtered alumina powder is conveyed to a fluorine-carrying alumina storage bin through a return chute and an elevator for electrolysis. In current dust pelletizing system, fresh alumina powder is directly sent into in the VIR reactor by the feeder pipe, do not have flow control device, make alumina and flue gas behind the entering dust remover unit, alumina powder can not be even enter into in each dust remover, some dust remover alumina powder are more can appear, the less or not condition that does not have of some dust remover alumina powder, it is unbalanced to lead to the dust remover area material like this, it is unstable to carry fluorine storehouse stock position, hydrogen fluoride emission data is unstable, powdered fluorine carrying alumina is concentrated, fresh alumina supplies the unusual phenomenon. Therefore, it is objectively needed to develop a fresh alumina flow control device of an electrolytic aluminum system, which has reasonable structure and accurate and controllable feeding amount, can ensure the balanced material carrying of a dust remover and can ensure the stable operation of equipment.

Disclosure of Invention

An object of the utility model is to provide a fresh alumina flow control device of electrolytic aluminum system that rational in infrastructure, the inventory is accurate controllable, can guarantee the balanced area material of dust remover, can guarantee again that equipment operation is stable.

The utility model aims at realizing the method, which comprises an alumina feeding unit, a VIR reactor unit, a dust remover unit, a lifter and a fluorine-carrying bin, wherein the alumina feeding unit comprises a feeder, a flowmeter, a first feeding pipe and a second feeding pipe, the feeder comprises a hopper, a feeding cylinder and a feeding impeller, two ends of the feeding cylinder are sealed by a sealing plate, a rotating shaft is coaxially arranged in the feeding cylinder, the feeding impeller is arranged on the rotating shaft, a driving motor connected with the rotating shaft in a transmission way is arranged at one end outside the feeding cylinder, an upper communicating hole is arranged at the top of the feeding cylinder, a lower communicating hole is arranged at the bottom of the feeding cylinder, the hopper is arranged on the upper communicating hole, the upper end of the flowmeter is arranged on the lower communicating hole, the upper end of the second feeding pipe is obliquely arranged at the lower end of the flowmeter, a second flange is arranged at the lower end of the second feeding pipe, the lower end of the first feeding pipe is obliquely arranged on the VIR reactor unit, the inclination of first feed pipe is the same with the inclination of second feed pipe, and the inside detachable of first feed pipe installs the throttle plate, and the circumference equipartition is provided with the unequal round hole of 4 diameters on the throttle plate, and movable mounting has the stopple in the round hole, and first flange is installed to the upper end of first feed pipe, and is connected fixedly through bolt, gasket and nut between first flange and the second flange.

Further, the flowmeter includes the box, go up communicating pipe and lower communicating pipe, go up the top that communicating pipe set up at the box, go up the upper end fixed mounting of communicating pipe and locate at communicating pipe down, lower communicating pipe sets up the bottom at the box, the lower extreme of communicating pipe and the upper end fixed connection of second feeding pipe down, it is provided with the metering plate to go up the slope in the box of communicating pipe below, the higher one end of metering plate is passed through the stay cord and is connected with the top in the box, the stay cord is passed through to the lower one end of metering plate and installs on the connecting rod, the upper end fixed mounting of connecting rod is at the top in the box, the central point of metering plate lower surface puts the department and is provided with the ejector pad, horizontal installation has the dowel bar on the ejector pad, the joint is installed to the tip of dowel bar, install flow sensor on the joint.

Further, the flow sensor is a beam type force measuring sensor.

Furthermore, a damping seat is arranged between the flow sensor and the bottom in the box body.

Furthermore, the inner wall of the feed cylinder is provided with a wear-resistant layer.

Further, the diameters of the circular holes are 14mm, 16mm, 18mm and 20mm, respectively.

Furthermore, a supporting ring plate is arranged in the first feeding pipe, and the throttle plate is arranged on the supporting ring plate through bolts and nuts.

Compared with the prior art, the device has the advantages that: firstly, the feeder and the flowmeter are arranged at the upper end of the feeding pipe, the feeder can uniformly convey fresh alumina in the hopper into the feeding pipe, the situation that the fresh alumina is blocked or flows unsmoothly in the feeding pipe is avoided, the flowmeter can accurately measure and control the flow of the fresh alumina entering the feeding pipe, and the uniform and stable conveyance of the fresh alumina in the feeding pipe is ensured; secondly, the feeding amount of fresh alumina can be accurately controlled by the throttle plate designed in the feeding pipe, when the throttle plate is used, only the proper diameter of the round hole needs to be reasonably selected according to the material level of the fluorine-carrying bin, the selected round hole is not blocked by a hole plug, and the rest 3 round holes need to be blocked by the hole plugs. The device has reasonable structural design, controls the flow of fresh alumina by selecting different apertures, ensures the 24-hour balanced belt material of the dust remover, ensures the advantages of standard emission of hydrogen fluoride, normal supply of super-concentrated phase materials and stable operation of equipment, and is easy to popularize and use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of an alumina feeding unit according to the present invention;

fig. 3 is a schematic structural view of the throttle plate 5 of the present invention;

in the figure: 1-VIR reactor unit, 2-first feeding pipe, 3-first flange, 4-second flange, 5-throttling plate, 501-round hole, 6-second feeding pipe, 7-flowmeter, 701-lower communicating pipe, 702-dowel bar, 703-shock mount, 704-flow sensor, 705-joint, 706-box, 707-pull rope, 708-upper communicating pipe, 709-metering plate, 710-connecting rod, 711-push block, 8-feeder, 801-lower communicating hole, 802-feeding barrel, 803-upper communicating hole, 804-hopper, 805-feeding impeller, 806-rotating shaft, 802-driving motor, 9-dust removal unit, 10-hoister, 11-fluorine carrying bin and 12-supporting ring plate.

Detailed Description

The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the present invention comprises an alumina feeding unit, a VIR reactor unit 1, a dust remover unit 9, a lifter 10 and a fluorine carrying bin 11, wherein the installation and connection structure of the alumina feeding unit, the VIR reactor unit 1, the dust remover unit 9, the lifter 10 and the fluorine carrying bin 11 is a structure used in the prior art, the alumina feeding unit comprises a feeder 8, a flowmeter 7, a first feeding pipe 2 and a second feeding pipe 6, the feeder 8 comprises a hopper 804, a feeding cylinder 802 and a feeding impeller 805, two ends of the feeding cylinder 802 are sealed by a sealing plate, a rotating shaft 806 is coaxially installed in the feeding cylinder 802, the feeding impeller 805 is installed on the rotating shaft 806, a driving motor 807 in transmission connection with the rotating shaft 806 is installed at one end outside the feeding cylinder 802, the driving motor 807 is a prior art, a finished product is directly purchased according to the used power, the top of feed cylinder 802 is provided with intercommunicating pore 803, and the bottom is provided with intercommunicating pore 801 down, hopper 804 is installed on last intercommunicating pore 803, the upper end of flowmeter 7 is installed under on intercommunicating pore 801, the lower extreme at flowmeter 7 is installed to the upper end slope of second feeding pipe 6, second flange 4 is installed to the lower extreme of second feeding pipe 6, the lower extreme slope of first feeding pipe 2 is installed on IR reactor unit 1, the inclination of first feeding pipe 2 is the same with the inclination of second feeding pipe 6, the inside detachable of first feeding pipe 2 is installed and is distinguished and admired 5, the circumference equipartition is provided with the round hole 501 of 4 diameters on the throttle plate 5, movable mounting has the stopple in the round hole 501, first flange 3 is installed to the upper end of first feeding pipe 2, pass through bolt between first flange 3 and the second flange 4, The gasket and the nut are connected and fixed, and a flange connection structure is adopted, so that the throttle plate 5 can be conveniently mounted or dismounted.

When the VIR reactor unit 1 is fed, fresh alumina is added into the hopper 804, the driving motor 807 is controlled to work, the driving motor 807 drives the rotating shaft 806 to rotate, the rotating shaft 806 drives the feeding impeller 805 to rotate, the feeding impeller 805 can circularly convey the fresh alumina in the upper communicating hole 803 to the lower communicating hole 801 in the rotating process, then the fresh alumina enters the second feeding pipe 6 through the flowmeter 7, the feeder 8 can uniformly convey the fresh alumina in the hopper 804 into the feeding pipe, the situation that the fresh alumina causes blockage or unsmooth flow in the feeding pipe is avoided, the flowmeter 7 can accurately measure and control the flow of the fresh alumina entering the feeding pipe, the uniform and stable conveyance of the fresh alumina in the feeding pipe is ensured, after the fresh alumina passes through the first feeding pipe 2, the hole plug of one of the circular holes 501 is opened, and the fresh alumina enters the VIR reactor through one of the circular holes 501, the design of the throttle screen 5 in the first feeding pipe 2 enables an accurate control of the fresh alumina dosage, and when the throttle screen 5 is in use, only the diameter of the circular hole 501 is reasonably selected according to the material level of the fluorine-carrying bin, the selected circular hole 501 is not blocked by a hole plug, the other 3 circular holes 501 need to be blocked by hole plugs, so that the fresh alumina entering the first feeding pipe 2 can be uniformly distributed into each dust remover under the action of the throttle plate 5, so that enough alumina is arranged in each dust remover to adsorb the fluorine-containing waste gas, thereby achieving the effect of uniformly feeding a plurality of dust removers at the same time, according to practical use experience, the diameters of the circular holes 501 are respectively 14mm, 16mm, 18mm and 20mm, different pore diameters are selected according to the material carrying effect of each dust remover and the material level condition of the fluorine-carrying bin, and the selection method comprises the following steps: if the material level of the fluorine-carrying bin is below 3.3m, the diameter of the circular hole 501 is 20 mm; the material level of the fluorine-carrying bin is between 3.3m and 3.5m, and the diameter of the circular hole 501 is 18 mm; the material level of the fluorine-carrying bin is between 3.5m and 3.7m, and the diameter of the selected round hole 501 is 16 mm; the material level of the fluorine-carrying bin is more than 3.7m, and the diameter of the selected round hole 501 is 14 mm.

Further, the flowmeter 7 is a punching plate flowmeter, the flowmeter 7 comprises a box 706, an upper communicating pipe 708 and a lower communicating pipe 701, the upper communicating pipe 708 is arranged at the top of the box 706, the upper end of the upper communicating pipe 708 is fixedly arranged at the position of the lower communicating pipe 801, the lower communicating pipe 701 is arranged at the bottom of the box 706, the lower end of the lower communicating pipe 701 is fixedly connected with the upper end of the second feeding pipe 6, a measuring plate 709 is obliquely arranged in the box 706 below the upper communicating pipe 708, the higher end of the measuring plate 709 is connected with the top in the box 706 through a pull rope 707, the lower end of the measuring plate 709 is arranged on a connecting rod 710 through a pull rope 707, the upper end of the connecting rod 710 is fixedly arranged at the top in the box 706, a push block 711 is arranged at the center of the lower surface of the measuring plate 709, a force transmission rod 702 is horizontally arranged on the push block 711, and a joint 705 is arranged at the end of the force transmission rod 702, the joint 705 is provided with the flow sensor 704, the flow sensor 704 is the prior art, the metering plate 709 is installed in an oblique angle, the oblique angle is 30-60 degrees, the oblique angle is the included angle between the metering plate 709 and the vertical central line of the box body 706, the fresh alumina falls on the metering plate 709 through the communicating pipe 708, the acting force generated by the materials on the metering plate 709 in the horizontal direction after turning can be measured by the flow sensor 704 to obtain a corresponding sensing signal, and therefore the measurement of the throughput of the fresh alumina is realized. Preferably, the flow sensor 704 is a beam load cell, which is accurate, simple and reliable in operation for a long time compared to other flow meters.

Further, a shock absorption seat 703 is installed between the flow sensor 704 and the bottom of the tank 706, and the shock absorption seat 703 can reduce the acting force of the fresh alumina falling onto the metering plate 709 on the flow sensor 704.

Further, be provided with the wearing layer on the inner wall of feed cylinder 802, feed impeller 805 contacts with the inner wall of feed cylinder 802 at rotatory in-process, can cause the condition of feed cylinder 802 wearing and tearing, and the wearing layer of setting can avoid the phenomenon of feed cylinder 802 wearing and tearing, the wearing layer can be for alloy steel material preparation or ceramic preparation.

Further, in order to facilitate the disassembly, assembly and replacement of the throttle plate 5, a supporting ring plate 12 is installed in the first feeding pipe 2, and the throttle plate 5 is installed on the supporting ring plate 12 through bolts and nuts.

Claims

1. The utility model provides an electrolytic aluminum system's fresh alumina flow control device, includes alumina feed unit, VIR reactor unit (1), dust remover unit (9), lifting machine (10) and carries fluorine storehouse (11), its characterized in that: the alumina feeding unit comprises a feeder (8), a flowmeter (7), a first feeding pipe (2) and a second feeding pipe (6), wherein the feeder (8) comprises a hopper (804), a feeding barrel (802) and a feeding impeller (805), two ends of the feeding barrel (802) are sealed through sealing plates, a rotating shaft (806) is coaxially installed in the feeding barrel (802), the feeding impeller (805) is installed on the rotating shaft (806), a driving motor (807) in transmission connection with the rotating shaft (806) is installed at one end outside the feeding barrel (802), an upper communicating hole (803) is formed in the top of the feeding barrel (802), a lower communicating hole (801) is formed in the bottom of the feeding barrel, the hopper (804) is installed on the upper communicating hole (803), the upper end of the flowmeter (7) is installed on the lower communicating hole (801), the upper end of the second feeding pipe (6) is obliquely installed at the lower end of the flowmeter (7), second flange (4) are installed to the lower extreme of second feeder pipe (6), the lower extreme slope of first feeder pipe (2) is installed on VIR reactor unit (1), the inclination of first feeder pipe (2) is the same with the inclination of second feeder pipe (6), throttle plate (5) are installed to the inside detachable of first feeder pipe (2), the circumference equipartition is provided with 4 unequally diameter round holes (501) on throttle plate (5), movable mounting has the stopple in round hole (501), first flange (3) are installed to the upper end of first feeder pipe (2), connect fixedly through bolt, gasket and nut between first flange (3) and second flange (4).

2. The fresh alumina flow control device of an electrolytic aluminum system according to claim 1, wherein: the flowmeter (7) comprises a box body (706), an upper communicating pipe (708) and a lower communicating pipe (701), the upper communicating pipe (708) is arranged at the top of the box body (706), the upper end of the upper communicating pipe (708) is fixedly arranged at the position of the lower communicating pipe (801), the lower communicating pipe (701) is arranged at the bottom of the box body (706), the lower end of the lower communicating pipe (701) is fixedly connected with the upper end of a second feeding pipe (6), a metering plate (709) is obliquely arranged in the box body (706) below the upper communicating pipe (708), the higher end of the metering plate (709) is connected with the top of the box body (706) through a pull rope (707), the lower end of the metering plate (709) is arranged on a connecting rod (710) through a pull rope (707), the upper end of the connecting rod (710) is fixedly arranged at the top of the box body (706), and a push block (711) is arranged at the central position of the lower surface of the metering plate (709), a dowel bar (702) is horizontally arranged on the push block (711), a joint (705) is arranged at the end part of the dowel bar (702), and a flow sensor (704) is arranged on the joint (705).

3. The fresh alumina flow control device of an electrolytic aluminum system according to claim 2, wherein: the flow sensor (704) is a beam load cell.

4. The fresh alumina flow control device of an electrolytic aluminum system according to claim 2, wherein: and a shock absorption seat (703) is arranged between the flow sensor (704) and the bottom in the box body (706).

5. The fresh alumina flow control device of an electrolytic aluminum system according to claim 1, wherein: and a wear-resistant layer is arranged on the inner wall of the feed barrel (802).

6. The fresh alumina flow control device of an electrolytic aluminum system according to claim 1, wherein: the diameters of the round holes (501) are 14mm, 16mm, 18mm and 20mm respectively.

7. The fresh alumina flow control device of an electrolytic aluminum system according to claim 1, wherein: a supporting ring plate (12) is installed in the first feeding pipe (2), and the throttle plate (5) is installed on the supporting ring plate (12) through bolts and nuts.