Anti-clogging scraping and raking device for powder at bottom of roasting furnace

Abstract

An anti-clogging scraping and raking device for powder at the bottom of a roasting furnace. The device comprises a scraping and raking shaft (6), an extension / retraction and rotation transmission mechanism (7), and a scraping and raking sleeve (5) fixed to a lower tapered base (1) of a roasting furnace, wherein one end of the scraping and raking sleeve (5) extends into the lower tapered base (1) of the roasting furnace, and the other end of the scraping and raking sleeve (5) is located outside the lower tapered base (1) of the roasting furnace; one end of the scraping and raking shaft (6) is provided with scraping and raking blades (4), and the end of the scraping and raking shaft (6) provided with the scraping and raking blades (4) extends into the scraping and raking sleeve (5); the other end of the scraping and raking shaft (6) located outside the scraping and raking sleeve (5) is connected to the extension / retraction and rotation transmission mechanism (7); the end of the scraping and raking sleeve (5) extending into the lower tapered base (1) of the roasting furnace is provided with a one-way cover plate (2) for sealing the scraping and raking sleeve (5); and the one-way cover plate (2) is hinged to the scraping and raking sleeve (5).

Description

Roasting furnace bottom powder anti-blocking scraper device TECHNICAL FIELD

[0001] The present application relates to the technical field of spray roasting, in particular to a roasting furnace bottom powder anti-blocking scraper device. BACKGROUND

[0002] In the production process of a spray roasting method waste acid regenerator unit, the oxide powder generated in the roasting furnace is generally discharged into the powder gas conveying system through the furnace bottom rotary valve, but in actual production, oxide powder caking may occur due to high viscosity and other reasons, which causes the powder in the roasting furnace bottom to bridge and accumulate, blocks the normal falling of the oxide powder in the upper part, causes system failure, and affects the safe operation of the equipment.

[0003] In general, when the lower part of the powder bin is blocked, an air cannon or other powder loosening device is usually used to break the powder bridge, but when the acid regenerator unit is in normal production, the negative pressure in the roasting furnace needs to be stably controlled, and if there is a sudden and severe pressure fluctuation, it may cause the system to run unstably, and even cause the system to stop suddenly, so the air cannon cannot be used to break the powder bridge.

[0004] Moreover, the roasting furnace bottom is a high-temperature acidic environment, and if metal materials stay in this environment for a long time, they may be severely corroded, so it is necessary to design a mechanical powder anti-blocking scraper device that can neither affect the normal production of the unit nor have a short service life, so as to solve the above problems.

[0005] SUMMARY

[0006] The present application aims to overcome the defects of the prior art and provides a roasting furnace bottom powder anti-blocking scraper device, which at least solves some of the problems in the prior art.

[0007] The present application is implemented as follows:

[0008] The present application provides a roasting furnace bottom powder anti-blocking scraper device, which comprises a scraper shaft, an extension and rotation transmission mechanism, a scraper sleeve fixed to the lower conical bottom of the roasting furnace, one end of the scraper sleeve extends into the lower conical bottom of the roasting furnace, the other end of the scraper sleeve is located outside the lower conical bottom of the roasting furnace, one end of the scraper shaft is provided with a scraper blade, the end of the scraper shaft provided with the scraper blade extends into the scraper sleeve, the other end of the scraper shaft located outside the scraper sleeve is connected with the extension and rotation transmission mechanism, and one end of the scraper sleeve extending into the lower conical bottom of the roasting furnace is provided with a one-way cover plate for closing the scraper sleeve, and the one-way cover plate is hinged to the scraper sleeve.

[0009] Further, the scraper sleeve is inclined, and one end of the scraper sleeve located in the lower conical bottom of the roasting furnace is higher than the other end of the scraper sleeve located outside the lower conical bottom of the roasting furnace.

[0010] Further, the scraper shaft is coaxially arranged with the scraper sleeve.

[0011] Further, the scraper sleeve is arranged on the sidewall outside the bottom cone of the roaster and is provided with a compressed air interface.

[0012] Further, the scraper blades are uniformly spaced along the circumference of the scraper shaft.

[0013] Further, the scraper blades are made of high-temperature-resistant prestressed curved elastic sheets, one end of each of the scraper blades is connected with the scraper shaft, the other end of each of the scraper blades can abut against the inner wall of the scraper sleeve, and the middle part of each of the scraper blades is close to the axial line of the scraper shaft.

[0014] Further, the telescopic rotary transmission mechanism comprises a driving cylinder for driving the scraper shaft to move along the scraper sleeve in the axial direction and a driving motor for driving the scraper shaft to rotate, the scraper shaft is connected with the output shaft of the driving motor, and the driving motor is fixed on the driving cylinder.

[0015] Further, along the radial direction of the scraper sleeve, the sectional area of the one-way cover plate is greater than that of the scraper sleeve.

[0016] Further, the one-way cover plate is hinged to the scraper sleeve through a one-way cover plate shaft arranged on the outer sidewall of the scraper sleeve.

[0017] Further, the surface of the scraper blade is sprayed with a non-magnetic lining material.

[0018] The present application has the following advantages:

[0019] 1. The powder anti-blocking scraper device provided by the present application can mechanically break the powder bridging and ensure the stable operation of the system in the roaster.

[0020] 2. In the case of powder blocking at the bottom of the roaster, the scraper blades are sent out of the scraper sleeve and extend to the powder accumulation area at the bottom of the roaster, thereby breaking the powder bridging; in the normal production process of the roaster, the scraper blades are located in the scraper sleeve, the scraper sleeve protects the scraper blades, avoids the serious corrosion of the scraper blades caused by long-time stay in the high-temperature and acidic environment at the bottom of the roaster, and thus ensures the service life of the scraper blades. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the scope of protection of the present application.

[0022] Fig. 1 is a schematic diagram of the rake blade of the roasting furnace bottom powder anti-blocking rake device not extended according to the embodiment of the present application;

[0023] Fig. 2 is a partial enlarged view of the lower right part of Fig. 1 according to the embodiment of the present application;

[0024] Fig. 3 is a partial enlarged view of the upper left part of Fig. 2 according to the embodiment of the present application;

[0025] Fig. 4 is a schematic diagram of the rake blade of the roasting furnace bottom powder anti-blocking rake device extended according to the embodiment of the present application;

[0026] Fig. 5 is a partial enlarged view of the lower right part of Fig. 4 according to the embodiment of the present application;

[0027] Fig. 6 is a partial enlarged view of the upper left part of Fig. 5 according to the embodiment of the present application.

[0028] In the drawings: roasting furnace lower cone bottom 1, one-way cover plate 2, one-way cover plate shaft 3, rake blade 4, rake sleeve 5, rake shaft 6, telescopic rotary transmission mechanism 7, compressed air interface 8, powder accumulation area 9. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "several" is two or more.

[0031] As shown in Fig. 1-6, the embodiment of the present application provides a rake device for preventing the powder in the roaster bottom from being blocked, which comprises a rake shaft 6, a telescopic rotary transmission mechanism 7, and a rake sleeve 5 fixed to the lower cone bottom 1 of the roaster. One end of the rake sleeve 5 extends into the lower cone bottom 1 of the roaster, and the other end of the rake sleeve 5 is located outside the lower cone bottom 1 of the roaster. One end of the rake shaft 6 is provided with rake blades 4, and the end of the rake shaft 6 provided with the rake blades 4 extends into the rake sleeve 5. The other end of the rake shaft 6 located outside the rake sleeve 5 is connected with the telescopic rotary transmission mechanism 7. One end of the rake sleeve 5 extending into the lower cone bottom 1 of the roaster is provided with a one-way cover plate 2 for closing the rake sleeve 5. The one-way cover plate 2 is hinged to the rake sleeve 5, and the hinge shaft is perpendicular to the rake shaft.

[0032] In the embodiment, the rake sleeve 5 is arranged obliquely, and the end of the rake sleeve 5 located inside the lower cone bottom 1 of the roaster is higher than the end of the rake sleeve 5 located outside the lower cone bottom 1 of the roaster. The rake shaft 6 is coaxially arranged with the rake sleeve 5.

[0033] In the embodiment, the side wall of the rake sleeve 5 located outside the lower cone bottom 1 of the roaster is provided with a compressed air interface 8. Compressed air is supplied into the rake sleeve 5 through the compressed air interface 8, so that the oxide powder cannot enter the rake sleeve 5 when the one-way cover plate 2 is opened. In the embodiment, 0.2-0.4 MPa compressed air is supplied into the rake sleeve 5, so that the micro-positive pressure ensures that the oxide powder cannot enter the rake sleeve 5.

[0034] In the embodiment, the rake blades 4 are arranged uniformly and spaced apart along the circumference of the rake shaft 6. In the embodiment, the rake blades 4 are made of high-temperature-resistant prestressed curved elastic sheets. One end of the rake blade 4 is connected with the rake shaft 6, and the other end of the rake blade 4 can abut against the inner wall of the rake sleeve 5. The middle part of each rake blade 4 is close to the axial line of the rake shaft 6, i.e. the other end of the rake blade 4 extends along the radial direction of the rake shaft. In the embodiment, the telescopic rotary transmission mechanism 7 comprises a driving cylinder for driving the rake shaft 6 to move axially along the rake sleeve 5 and a driving motor for driving the rake shaft 6 to rotate. The rake shaft 6 is connected with the output shaft of the driving motor, and the driving motor is fixed to the driving cylinder. The telescopic rotary transmission mechanism 7 can also be replaced by manual control, i.e. the extension and rotation of the rake shaft 6 are controlled manually. In the present application, the telescopic rotary transmission mechanism 7 can be driven by manpower or electricity / gas according to the actual situation.

[0035] When the powder is blocked in the bottom of the roaster, the telescopic rotary transmission mechanism 7 pushes the scraper blade 4 to open the one-way cover plate 2, and the scraper blade 4 extends to the powder accumulation area 9 of the bottom of the roaster, and after the scraper blade 4 extends out of the scraper sleeve 5, the scraper blade 4 is no longer constrained by the inner wall of the scraper sleeve 5 and naturally spreads out, as shown in FIG. 6, each scraper blade 4 spreads out in a hook shape, the telescopic rotary transmission mechanism 7 drives the scraper blade 4 to extend and rotate through the scraper shaft 6, and the powder bridge in the bottom of the roaster is broken; when the bottom of the roaster is unblocked, the telescopic rotary transmission mechanism 7 drives the scraper blade 4 to retract into the scraper sleeve 5, and when the scraper blade 4 retracts, the one-way cover plate 2 is in the retraction path of at least one scraper blade 4, the scraper blade 4 drives the one-way cover plate 2 to close towards the scraper sleeve 5; in other embodiments, a spring can also be provided to allow the one-way cover plate 2 to close automatically, for example, one end of the spring is connected with the one-way cover plate 2, and the other end of the spring is connected with the scraper sleeve 5. The structure of the scraper blade 4 can be various, and is not limited to the structure shown in the figure, as long as it can play a role in breaking the powder bridge. The one-way cover plate 2 provided in the present application can ensure that the oxide powder does not enter the scraper sleeve 5 during normal production of the roaster.

[0036] In the present embodiment, the cross-sectional area of the one-way cover plate 2 is greater than the cross-sectional area of the scraper sleeve 5 along the radial direction of the scraper sleeve 5. The one-way cover plate 2 is hinged to the scraper sleeve 5 through the one-way cover plate shaft 3, and the one-way cover plate shaft 3 is arranged on the outer side wall of the scraper sleeve 5. In the present embodiment, the one-way cover plate 2 can only open outward relative to the scraper sleeve 5, and the one-way cover plate 2 cannot turn into the inside of the scraper sleeve 5.

[0037] In the present embodiment, the surface of the scraper blade 4 is sprayed with a special non-magnetic lining material to avoid magnetic foreign matter adhering to the scraper blade 4 and entering the roaster.

[0038] The powder anti-blocking scraper device provided by the present application can break the blockage by mechanical means when the bottom of the roaster is blocked, and can also be withdrawn when there is no blockage without affecting the normal production of the powder and ensuring the service life of the scraper device.

[0039] In the present application, the scraper blade 4 is connected to the top end of the scraper shaft 6 and arranged in the scraper sleeve 5, and driven to operate by the telescopic rotary transmission mechanism 7, so that the scraper blade 4 can spread out after extending out of the scraper sleeve 5.

[0040] The scraper blade 4 can be pushed out of the scraper sleeve 5 by the telescopic rotary transmission mechanism 7 through the scraper shaft 6 and driven to rotate under the action of the telescopic rotary transmission mechanism 7. After the scraping is completed, the pushed-out scraper blade 4 can be retracted into the scraper sleeve 5 by the telescopic rotary transmission mechanism 7 through the scraper shaft 6. The one-way cover plate 2 is opened when the scraper blade 4 is pushed out of the scraper sleeve 5, and the one-way cover plate 2 is closed when the scraper blade 4 is retracted into the scraper sleeve 5. The scraper blade 4 is made of pre-stressed high-temperature-resistant (400-600 DEG C) material.

[0041] The mechanical powder anti-blocking scraper device provided by the application can also be applied to the acid liquid spray roasting process in the new energy battery ternary precursor, hydrometallurgy, non-ferrous and other industries.

[0042] The powder anti-blocking scraper device provided by the application can destroy the powder bridging by a mechanical method, while ensuring the stable operation of the system in the roasting furnace.

[0043] In the case of roasting furnace bottom powder blockage, the scraper blade 4 is sent out of the scraper sleeve 5, the scraper blade 4 extends to the powder accumulation area 9 of the roasting furnace lower cone bottom 1, and the powder bridging is destroyed; and in the normal production process of the roasting furnace, the scraper blade 4 is located in the scraper sleeve 5, the scraper sleeve 5 protects the scraper blade 4, avoids the long-term stay of the scraper blade 4 in the high-temperature acid environment at the bottom of the roasting furnace, and avoids the occurrence of serious corrosion, so as to ensure the service life of the scraper blade 4.

[0044] In the application, the scraper sleeve 5 is provided with a one-way cover plate 2 or compressed air is supplied to the scraper sleeve 5, so that the oxide powder can be prevented from entering the scraper sleeve 5.

[0045] The contents not described in detail in the specification belong to the prior art known by those skilled in the art.

[0046] The above only describes the preferred embodiments of the application and is not used to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A device for preventing clogging of a sintering furnace bottom powder material by a rake, characterized by: The scraper shaft, the telescopic rotary transmission mechanism, the scraper sleeve fixed on the lower cone bottom of the roasting furnace, one end of the scraper sleeve extends into the lower cone bottom of the roasting furnace, the other end of the scraper sleeve is located outside the lower cone bottom of the roasting furnace, one end of the scraper shaft is provided with a scraper blade, the end of the scraper shaft provided with the scraper blade extends into the scraper sleeve, the other end of the scraper shaft located outside the scraper sleeve is connected with the telescopic rotary transmission mechanism, the end of the scraper sleeve extending into the lower cone bottom of the roasting furnace is provided with a one-way cover plate for closing the scraper sleeve, and the one-way cover plate is hinged with the scraper sleeve.

2. The coking furnace bottom powder anti-blocking scraper device according to claim 1, characterized in that: The scraper sleeve is arranged obliquely, and the end of the scraper sleeve located in the lower cone bottom of the roasting furnace is higher than the end of the scraper sleeve located outside the lower cone bottom of the roasting furnace.

3. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The scraper shaft is coaxially arranged with the scraper sleeve.

4. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The scraper sleeve is provided with a compressed air interface on the side wall outside the lower cone bottom of the roasting furnace.

5. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The scraper blade has a plurality of scraper blades, and each scraper blade is uniformly and spacedly arranged along the circumference of the scraper shaft.

6. The coking oven bottom powder anti-blocking scraper device according to claim 5, characterized in that: The scraper blade adopts a high-temperature-resistant prestressed curved elastic sheet, one end of the scraper blade is connected with the scraper shaft, the other end of the scraper blade can abut against the inner wall of the scraper sleeve, and the middle part of each scraper blade is close to the axial line of the scraper shaft.

7. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The telescopic rotary transmission mechanism includes a driving cylinder for driving the scraper shaft to move axially along the scraper sleeve and a driving motor for driving the scraper shaft to rotate, the scraper shaft is connected with the output shaft of the driving motor, and the driving motor is fixed on the driving cylinder.

8. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: In the radial direction of the scraper sleeve, the cross-sectional area of the one-way cover plate is greater than that of the scraper sleeve.

9. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The one-way cover plate is hinged with the scraper sleeve through a one-way cover plate shaft arranged on the outer side wall of the scraper sleeve.

10. The coking oven bottom powder anti-blocking scraper device according to claim 1, characterized in that: The surface of the scraper blade is sprayed with a non-magnetic lining material.

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