Praseodymium neodymium oxide rotary kiln dust recovery device

Abstract

The utility model discloses a praseodymium neodymium oxide rotary kiln dust recovery device, and belongs to the technical field of rare earth production. Comprising a dust removal tower, one side of the dust removal tower is communicated with a spraying tower, a keel dust removal bag is arranged in an inner cavity of the dust removal tower, a discharging pipe is arranged at the bottom of the dust removal tower, an electromagnetic valve is arranged on the discharging pipe, the discharging pipe is connected with a collecting box, and the collecting box comprises an upper inserting box and a lower sleeving box; spring rods are symmetrically arranged on the outer walls of the two sides of the lower sleeve box, and one end of a piston rod of each spring rod is fixedly connected with the side wall of the upper plug-in box through a connecting block. The dust removal tower and the spray tower perform double filtration treatment on the praseodymium neodymium oxide dust, so that the recovery efficiency of the praseodymium neodymium oxide dust can be greatly improved. Besides, when the dust removal tower works, the praseodymium and neodymium oxide dust in the dust removal tower can be conveyed into the collecting box through airflow of the dust removal tower, shutdown is not needed, the airflow of the dust removal tower can be effectively poured through the exhaust pipe, and the praseodymium and neodymium oxide dust cannot be blown into air.

Description

Technical Field

[0001] The utility model relates to a praseodymium-neodymium oxide rotary kiln dust recovery device, belonging to the technical field of rare earth production. Background Art

[0002] Praseodymium-neodymium is an element with relatively large output and high application value among rare earth elements. It plays an important role in the rare earth field and often influences the direction of the rare earth market. The main use of praseodymium-neodymium metal is to produce rare earth permanent magnet materials. The characteristics of rare earth permanent magnet materials are high saturation magnetization intensity of various phase anisotropies of magnetic crystals, high residual magnetic induction intensity, high coercive force and high maximum magnetic energy level. It is mainly used in micromotors, energy-saving motors, speakers, medical magnetic resonance imaging devices, etc. Praseodymium-neodymium metal can be prepared by praseodymium-neodymium chloride, praseodymium-neodymium oxide molten salt electrolysis or metal thermal reduction method. The praseodymium-neodymium oxide molten salt electrolysis method is generally used in production. The praseodymium-neodymium oxide for electrolysis requires uniform particle size, high activity and excellent melting performance in electrolyte. In actual production, praseodymium-neodymium oxide is obtained by burning praseodymium-neodymium carbonate or praseodymium-neodymium oxalate. Burning can be divided into dynamic burning and static burning. Static burning adopts muffle furnace, inverted smoke kiln and other methods, which has the advantages of simple equipment and less investment, but also has the disadvantages of high energy consumption, small output, easy contamination of products by utensils, difficult to control product quality, and unsuitable for large-scale production. It has been gradually eliminated by praseodymium-neodymium oxide manufacturers. Dynamic burning is generally divided into two forms: tunnel kiln and rotary kiln. Tunnel kiln can produce continuously and has a large production volume, but it has the disadvantages of high labor intensity of workers, easy contamination of materials by utensils, uneven temperature in the kiln body causing overburning of some materials, etc. Rotary kiln production can be mass-produced and reduce the labor intensity of workers.

[0003] In the existing calcination rotary kiln, a large amount of waste gas containing praseodymium-neodymium oxide dust is generated during production. Direct discharge will cause a waste of resources. At present, most of the dust collectors are used to recycle the praseodymium-neodymium oxide dust, but the dust recovery of the dust collector is not thorough, resulting in a certain amount of waste. In addition, when the dust collector collects the praseodymium-neodymium oxide dust, it is necessary to stop the dust collector for dust collection, otherwise the collected dust will be blown into the air under the action of the dust collector airflow, affecting work efficiency.

[0004] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a praseodymium-neodymium oxide rotary kiln dust recovery device which has good collection and treatment effect of praseodymium-neodymium oxide dust and can collect praseodymium-neodymium oxide dust without stopping the machine, thereby improving work efficiency.

[0006] An optimization scheme, a praseodymium-neodymium oxide rotary kiln dust recovery device, comprising a dust removal tower, one side of the dust removal tower is connected to a spray tower, the inner cavity of the dust removal tower is provided with a keel dust removal bag, the bottom of the dust removal tower is provided with a discharge pipe, the discharge pipe is provided with a solenoid valve, and the discharge pipe is connected to a collection box;

[0007] The collection box comprises an upper plug-in box and a lower sleeve box. The upper plug-in box is inserted and slidably arranged in the upper inner cavity of the lower sleeve box. The outer walls on both sides of the lower sleeve box are symmetrically provided with spring rods. One end of the piston rod of the spring rod is fixedly connected to the side wall of the upper plug-in box through a connecting block.

[0008] Furthermore, support plates are longitudinally arranged around the bottom of the collecting box, universal wheels are arranged at the bottom of the support plates, and a discharge pipe is arranged at the middle position of the bottom of the collecting box, and a valve A is arranged on the discharge pipe.

[0009] Furthermore, a sleeve is provided on the upper portion of the upper plug-in box, and the discharge pipe is inserted into the sleeve.

[0010] Furthermore, an exhaust pipe is provided on the upper part of the collection box, and a filter cover is provided on the upper part of the exhaust pipe.

[0011] Furthermore, an air inlet pipe A is provided in the middle of one side of the dust removal tower, and the air inlet pipe A is connected to the side wall of the keel dust removal bag, and the mouth of the keel dust removal bag is arranged toward the bottom of the dust removal tower.

[0012] Furthermore, an air outlet pipe A is provided on the upper part of the side wall of the dust removal tower, and the air outlet pipe A is connected to an air pump, and the air pump is connected to the spray tower pipeline.

[0013] Furthermore, an air inlet pipe B is provided at the bottom of the side wall of the spray tower, and the air inlet pipe B is connected to the air pump pipeline.

[0014] Furthermore, the bottom pipeline of the spray tower is connected to a water tank, the water tank is connected to a water pump, the water pump is connected to the middle of the side wall of the spray tower through a connecting pipe, a spray plate is provided in the middle of the inner cavity of the spray tower, and the spray plate is connected to the connecting pipe.

[0015] Furthermore, an air outlet pipe B is provided at the upper portion of the spray tower.

[0016] Furthermore, a water supply pipe is provided at the upper part of the water tank, a water outlet pipe is provided at the bottom of the side wall of the water tank, and a valve B is provided on the water outlet pipe.

[0017] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0018] The utility model uses a dust removal tower and a spray tower to perform double filtering treatment on praseodymium-neodymium oxide dust, which can greatly improve the recovery efficiency of praseodymium-neodymium oxide dust. In addition, when the dust removal tower is working, the collection box will use the airflow of the dust removal tower to transport the praseodymium-neodymium oxide dust in the dust removal tower into the collection box without stopping the machine. The exhaust pipe can effectively dump the airflow of the dust removal tower, and will not cause the praseodymium-neodymium oxide dust to be blown into the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a praseodymium-neodymium oxide rotary kiln dust recovery device of the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of a dust removal tower of a praseodymium-neodymium oxide rotary kiln dust recovery device of the utility model;

[0021] Figure 3 It is a schematic cross-sectional structure diagram of a collection box of a praseodymium-neodymium oxide rotary kiln dust recovery device of the utility model;

[0022] Figure 4 It is a cross-sectional structural diagram of a spray tower of a praseodymium-neodymium oxide rotary kiln dust recovery device of the utility model;

[0023] In the figure, 1-dust removal tower, 2-spray tower, 3-keel dust bag, 4-discharge pipe, 5-collection box, 6-upper plug box, 7-lower sleeve box, 8-spring rod, 9-connecting block, 10-support plate, 11-universal wheel, 12-discharge pipe, 13-valve A, 14-sleeve, 15-exhaust pipe, 16-filter cover, 17-inlet pipe A, 18-outlet pipe A, 19-vacuum pump, 20-inlet pipe B, 21-water tank, 22-water pump, 23-connecting pipe, 24-spray plate, 25-outlet pipe B, 26-water adding pipe, 27-outlet pipe, 28-valve B. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "top surface", "bottom surface" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] Examples, such as Figure 1 , 2 As shown in , 3 and 4, the utility model provides a praseodymium-neodymium oxide rotary kiln dust recovery device, comprising a dust removal tower 1, one side of the dust removal tower 1 is connected to a spray tower 2, the inner cavity of the dust removal tower 1 is provided with a keel dust removal bag 3, the bottom of the dust removal tower 1 is provided with a discharge pipe 4, the discharge pipe 4 is provided with a solenoid valve, and the discharge pipe 4 is connected to a collection box 5;

[0028] The collection box 5 includes an upper plug-in box 6 and a lower sleeve box 7. The upper plug-in box 6 is inserted and slidably arranged in the upper inner cavity of the lower sleeve box 7. The outer walls on both sides of the lower sleeve box 7 are symmetrically provided with spring rods 8. One end of the piston rod of the spring rod 8 is fixedly connected to the side wall of the upper plug-in box 6 through a connecting block 9.

[0029] The bottom of the collecting box 5 is longitudinally provided with support plates 10, the bottom of the support plates 10 is provided with universal wheels 11, and the middle position of the bottom of the collecting box 5 is provided with a discharge pipe 12, and the discharge pipe is provided with a valve A13.

[0030] A sleeve 14 is provided on the upper portion of the upper plug box 6 , and the discharge pipe 4 is inserted into the sleeve 14 .

[0031] An exhaust pipe 15 is disposed on the upper portion of the collecting box 5 , and a filter cover 16 is disposed on the upper portion of the exhaust pipe 15 .

[0032] An air inlet pipe A17 is provided in the middle of one side of the dust removal tower 1 . The air inlet pipe A17 is connected to the side wall of the keel dust removal bag 3 . The mouth of the keel dust removal bag 3 is arranged toward the bottom of the dust removal tower 1 .

[0033] An air outlet pipe A18 is provided on the upper part of the side wall of the dust removal tower 1, and the air outlet pipe A18 is connected to an air pump 19, and the air pump 19 is connected to the spray tower 2 pipeline.

[0034] An air inlet pipe B20 is provided at the bottom of the side wall of the spray tower 2, and the air inlet pipe B20 is connected to the air pump 19 via a pipeline.

[0035] The bottom pipeline of the spray tower 2 is connected to a water tank 21, the water tank 21 is connected to a water pump 22, the water pump 22 is connected to the middle of the side wall of the spray tower 2 through a connecting pipe 23, a spray plate 24 is provided in the middle of the inner cavity of the spray tower 2, and the spray plate 24 is connected to the connecting pipe 23.

[0036] An air outlet pipe B25 is provided at the upper portion of the spray tower 2.

[0037] A water supply pipe 26 is provided at the upper portion of the water tank 21 , a water outlet pipe 27 is provided at the bottom of the side wall of the water tank 21 , and a valve B28 is provided at the water outlet pipe 27 .

[0038] The working principle of this utility model:

[0039] The waste gas with praseodymium-neodymium oxide dust enters the keel dust removal bag 3 through the air inlet pipe A17, the keel dust removal bag 3 filters the waste gas, and the praseodymium-neodymium oxide dust remains in the keel dust removal bag 3. The filtered waste gas is discharged from the keel dust removal bag 3 through the side wall of the keel dust removal bag 3, the vacuum pump 19 is started, and the filtered waste gas is transported to the spray tower 2 through the air outlet pipe A18, the water pump 22 draws clean water in the water tank 21, and the waste gas is subjected to secondary filtration and dust removal through the spray plate 24. The waste gas after the secondary filtration and dust removal is discharged through the air outlet pipe B25, and the clean water that absorbs the praseodymium-neodymium oxide dust enters the water tank 21 through the bottom of the spray tower 2, and is recycled by the water pump 22. At the end of the work, the solenoid valve of the discharge pipe 4 and the valve B28 of the water outlet pipe 27 are opened, and the dust in the dust removal tower 1 enters the collecting box 5, and the clean water in the water tank 21 is collected and processed by the staff. The staff presses the upper plug box 6 to separate the discharge pipe 4 from the sleeve 14 , and then uses the universal wheel 11 to separate the collection box 5 from the dust removal tower 1 , and then the staff recovers and processes the dust in the collection box 5 .

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0041] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A praseodymium-neodymium oxide rotary kiln dust recovery device, characterized in that: It comprises a dust removal tower (1), one side of the dust removal tower (1) is connected to a spray tower (2), the inner cavity of the dust removal tower (1) is provided with a keel dust removal bag (3), the bottom of the dust removal tower (1) is provided with a discharge pipe (4), the discharge pipe (4) is provided with a solenoid valve, and the discharge pipe (4) is connected to a collection box (5); The collecting box (5) comprises an upper insert box (6) and a lower sleeve box (7); the upper insert box (6) is inserted and slidably arranged in the upper inner cavity of the lower sleeve box (7); spring rods (8) are symmetrically arranged on the outer walls of both sides of the lower sleeve box (7); one end of the piston rod of the spring rod (8) is fixedly connected to the side wall of the upper insert box (6) through a connecting block (9).

2. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 1, characterized in that: Support plates (10) are longitudinally arranged around the bottom of the collecting box (5), and universal wheels (11) are arranged at the bottom of the supporting plates (10). A discharge pipe (12) is arranged at the middle of the bottom of the collecting box (5), and a valve A (13) is arranged on the discharge pipe.

3. A praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 2, characterized in that: The upper portion of the upper plug box (6) is provided with a sleeve (14), and the discharge pipe (4) and the sleeve (14) are inserted into each other.

4. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 2, characterized in that: An exhaust pipe (15) is provided on the upper part of the collection box (5), and a filter cover (16) is provided on the upper part of the exhaust pipe (15).

5. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 1, characterized in that: An air inlet pipe A (17) is provided in the middle of one side of the dust removal tower (1), and the air inlet pipe A (17) is connected to the side wall of the keel dust removal bag (3), and the mouth of the keel dust removal bag (3) is arranged toward the bottom of the dust removal tower (1).

6. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 1, characterized in that: An air outlet pipe A (18) is provided on the upper part of the side wall of the dust removal tower (1), and the air outlet pipe A (18) is connected to an air pump (19), and the air pump (19) is connected to the spray tower (2) through a pipeline.

7. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 6, characterized in that: An air inlet pipe B (20) is provided at the bottom of the side wall of the spray tower (2), and the air inlet pipe B (20) is connected to the air pump (19) through a pipeline.

8. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 1, characterized in that: The bottom pipeline of the spray tower (2) is connected to a water tank (21), the water tank (21) is connected to a water pump (22), the water pump (22) is connected to the middle of the side wall of the spray tower (2) through a connecting pipe (23), and a spray plate (24) is provided in the middle of the inner cavity of the spray tower (2), and the spray plate (24) is connected to the connecting pipe (23).

9. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 1, characterized in that: An air outlet pipe B (25) is provided at the upper portion of the spray tower (2).

10. The praseodymium-neodymium oxide rotary kiln dust recovery device according to claim 8, characterized in that: A water supply pipe (26) is provided at the upper portion of the water tank (21), a water outlet pipe (27) is provided at the bottom of the side wall of the water tank (21), and a valve B (28) is provided on the water outlet pipe (27).

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