Rotary kiln tail sealing dust removal device

Abstract

The invention relates to the technical field of rotary kiln tail sealing dust removal, and discloses a rotary kiln tail sealing dust removal device which comprises a rotary kiln tail pipe and a dust remover, and a wear-resistant and high-temperature-resistant dust remover inlet is formed in the left side of the dust remover; a kiln body fixing ring fixedly sleeves the outer side of the left end of the rotary kiln tail pipe, a conical sleeve is fixedly welded to the left side of the rotary kiln tail pipe, a dynamic friction ring is arranged on the left side of the conical sleeve, and the right end of the dynamic friction ring is in sealing connection with the conical sleeve through a flange plate. The flexible sealing suite is adopted, the sealing performance is good, the service life is long, maintenance is avoided, the coal-saving and electricity-saving effects are obvious, high-temperature dust flying is avoided, the operation environment of workers is obviously improved, the suite suitable for sealing the kiln head and the kiln tail is designed according to the existing operation environment, the service life of the sealing piece can be greatly prolonged by more than three years, and the sealing effect is good. After transformation is completed, the phenomena of positive pressure air leakage and ash leakage of the kiln head can be effectively controlled, the problem of material returning of the kiln tail is solved, and high-temperature carbonization of the kiln tail and the kiln head material blocking iron is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln tail sealing dust removal, in particular to a rotary kiln tail sealing dust removal device. Background Art

[0002] The rotary kiln is a common industrial equipment. The applicant has used the rotary kiln in the process of producing titanium dioxide from metatitanic acid. The kiln tail seal is currently a fish scale seal device; During the long-term use of the rotary kiln, the sealing ring may age and wear due to the influence of high temperature, high pressure and friction, resulting in reduced sealing effect and leakage; the tightness of the sealing ring is also an important factor affecting the sealing effect of the rotary kiln tail. If it is too tight, the sealing ring will be deformed, and leakage will occur; if it is too loose, a gap will be created between the sealing ring and the corresponding part, which will also cause leakage; the material selection of the sealing ring is also one of the key factors affecting the sealing effect. Improperly selected sealing materials may not be able to withstand the long-term wear test of high temperature, high pressure and friction at the kiln tail, resulting in leakage. At the same time, unreasonable sealing structure design is also one of the factors that may cause leakage at the rotary kiln tail. If the sealing structure design is unreasonable, it may not be able to withstand the working conditions under high temperature and high pressure of the rotary kiln, thus affecting the sealing effect; The introduction of air leakage into the rotary kiln not only increases the heat consumption, but also reduces the wind speed at the smoke chamber mouth, causing small-scale material collapse and reducing the decomposition rate in the kiln, which has a great impact on the production and quality of the rotary kiln, while increasing energy consumption and causing cost increases.

[0003] Therefore, a rotary kiln tail sealing dust removal device is proposed. Summary of the invention

[0004] The object of the present invention is to provide a rotary kiln tail sealed dust removal device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a rotary kiln tail sealed dust removal device, comprising a rotary kiln tail pipe and a dust collector, wherein a wear-resistant and high-temperature resistant dust collector inlet is arranged on the left side of the dust collector; The outer fixed sleeve at the left end of the rotary kiln tail pipe is provided with a kiln body fixed ring, a conical sleeve is fixedly welded on the left side of the rotary kiln tail pipe, a dynamic friction ring is arranged on the left side of the conical sleeve, the right end of the dynamic friction ring is sealed and connected with the conical sleeve through a flange, and the inside of the dynamic friction ring is connected with the inside of the conical sleeve; A sealing cover is sleeved on the outer side of the dynamic friction ring, a connecting arc plate is fixedly arranged on the bottom surface of the sealing cover, and a flange seat is fixedly arranged on the right end of the sealing cover; A three-layer sealing device is arranged between the flange seat and the kiln body fixing ring, and the sealing cover is connected with the inlet of the wear-resistant and high-temperature resistant dust collector through the dust collecting flue.

[0006] Preferably, a built-in sealing device is provided on the inner side of the flange seat, and the built-in sealing device is sleeved on the outer side of the dynamic friction ring. The inner side surface of the left end of the built-in sealing device is in sealing sliding contact with the surface of the dynamic friction ring, and the right end surface of the built-in sealing device is sealed and fixedly connected to the inner wall of the flange seat.

[0007] Preferably, the three-layer sealing device includes a sealing ring cover, the sealing ring cover fixed sleeve is arranged on the outer surface of the kiln body fixed ring, the left end of the sealing ring cover fixed sleeve is provided with a connecting ring seat, and the left end of the connecting ring seat is sealed and fixedly connected to the right end surface of the flange seat.

[0008] Preferably, a circle of compression wire rope is sleeved on the outer side of the sealing ring cover, a connecting ring is slidingly sleeved on the compression wire rope, the connecting ring is fixedly connected to the surface of the sealing ring cover, and a counterweight is fixedly connected to the bottom end of the compression wire rope.

[0009] Preferably, a filter chamber is provided inside the dust collector, and an ash hopper is provided at the bottom end of the dust collector corresponding to below the filter chamber, and the ash hopper is connected to the inside of the filter chamber.

[0010] Preferably, a clean air chamber is arranged above the filter chamber corresponding to the top of the dust collector, and the clean air chamber is connected with the inside of the filter chamber. An outlet flue is arranged on the side of the dust collector and is connected with the inside of the clean air chamber.

[0011] Preferably, a dust cleaning system is fixedly arranged between the clean air chamber and the filter chamber inside the dust collector.

[0012] Preferably, the filter chamber is connected to the inlet of the wear-resistant and high-temperature resistant dust collector, and a metal filter element is vertically fixedly arranged inside the filter chamber at a position corresponding to the inlet of the wear-resistant and high-temperature resistant dust collector.

[0013] Compared with the prior art, the invention has the following beneficial effects: the rotary kiln tail sealing dust removal device, 1) The flexible sealing kit adopted has good sealing performance, long service life, maintenance-free, obvious coal and electricity saving effect, no high-temperature dust flying, and significantly improved the working environment of workers; 2) By designing a set of seals suitable for the kiln head and kiln tail according to the existing operating environment, the service life of the seals can be greatly increased to more than three years. After the transformation is completed, it will effectively control the positive pressure air leakage and ash leakage at the kiln head, solve the problem of material return at the kiln tail, and solve the high-temperature carbonization of the iron blocking material at the kiln tail and kiln head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the rotary kiln tail structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of area A in the middle; Figure 4 This is an internal cross-sectional view of the dust collector structure of the present invention.

[0015] In the figure: 1. rotary kiln tail pipe; 2. sealing cover; 3. built-in sealing device; 4. flange seat; 5. three-layer sealing device; 51. sealing ring cover; 52. connecting ring seat; 6. kiln body fixing ring; 7. dynamic friction ring; 8. pressing wire rope; 9. counterweight; 10. wear-resistant and high-temperature resistant dust collector inlet; 11. dust cleaning system; 12. metal filter element; 13. clean air chamber; 14. outlet flue; 15. filter chamber; 16. ash hopper. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1: See also Figure 1-Figure 4 The present invention provides a technical solution: a rotary kiln tail sealed dust removal device, comprising a rotary kiln tail pipe 1 and a dust collector, and a wear-resistant and high-temperature resistant dust collector inlet 10 is arranged on the left side of the dust collector; The outer fixed sleeve at the left end of the rotary kiln tail pipe 1 is provided with a kiln body fixed ring 6, and a conical sleeve is fixedly welded on the left side of the rotary kiln tail pipe 1. A dynamic friction ring 7 is provided on the left side of the conical sleeve. The right end of the dynamic friction ring 7 is sealed and connected to the conical sleeve through a flange, and the inside of the dynamic friction ring 7 is connected to the inside of the conical sleeve. A sealing cover 2 is sleeved on the outer side of the dynamic friction ring 7, a connecting arc plate is fixedly arranged on the bottom surface of the sealing cover 2, and a flange seat 4 is fixedly arranged on the right end of the sealing cover 2; A three-layer sealing device 5 is arranged between the flange seat 4 and the kiln body fixing ring 6. The sealing cover 2 is connected with the wear-resistant and high-temperature resistant dust collector inlet 10 through the dust collecting flue. A built-in sealing device 3 is arranged on the inner side of the flange seat 4. The built-in sealing device 3 is sleeved on the outer side of the dynamic friction ring 7. The inner side surface of the left end of the built-in sealing device 3 is in sealing and sliding contact with the surface of the dynamic friction ring 7. The right end surface of the built-in sealing device 3 is sealed and fixedly connected with the inner wall of the flange seat 4. The three-layer sealing device 5 includes a sealing ring cover 51, which is fixedly sleeved on the outer surface of the kiln body fixing ring 6, and a connecting ring seat 52 is fixedly sleeved on the left end of the sealing ring cover 51. The left end of the connecting ring seat 52 is sealed and fixedly connected to the right end surface of the flange seat 4, and a circle of clamping wire rope 8 is sleeved on the outer side of the sealing ring cover 51. A connecting ring is slidingly sleeved on the clamping wire rope 8, and the connecting ring is fixedly connected to the surface of the sealing ring cover 51. A counterweight block 9 is fixedly connected to the bottom end of the clamping wire rope 8.

[0018] Embodiment 2 See also Figure 1-Figure 4 , and on the basis of Example 1, it is further obtained that: a filter chamber 15 is arranged inside the dust collector, a dust collecting hopper 16 is arranged below the filter chamber 15 at the bottom of the dust collector corresponding to the dust collecting hopper 16, and the dust collecting hopper 16 is arranged through the inside of the filter chamber 15, a clean air chamber 13 is arranged above the top of the dust collector corresponding to the filter chamber 15, and the clean air chamber 13 is arranged through the inside of the filter chamber 15, an outlet flue 14 is arranged on the side of the dust collector and is connected through the inside of the clean air chamber 13, and a dust cleaning system 11 is fixedly arranged between the clean air chamber 13 and the filter chamber 15 inside the dust collector; The filter chamber 15 is connected to the wear-resistant and high-temperature resistant dust collector inlet 10 , and a metal filter element 12 is vertically fixedly arranged inside the filter chamber 15 at a position corresponding to the wear-resistant and high-temperature resistant dust collector inlet 10 .

[0019] Furthermore, the flexible sealing kit adopted in this embodiment has good sealing performance, long service life, maintenance-free, obvious coal and electricity saving effect, no high-temperature dust flying, and significantly improved working environment for workers. By designing a kit suitable for kiln head and kiln tail sealing according to the existing operating environment, the service life of the seal can be greatly increased to more than three years. After the transformation is completed, it will effectively control the positive pressure air leakage and ash leakage at the kiln head, solve the problem of material return at the kiln tail, and the high-temperature carbonization of the material blocking iron at the kiln tail and kiln head.

[0020] Weld the shrinkage (small round end) to the kiln body on the outer circle of the steel ring, and weld the friction sleeve on the shrinkage (large round end). Natural cold air enters the shrinkage from the friction sleeve to cool the shrinkage and the steel ring; weld the legislative flange on the kiln tail cover, and connect the sealing flange with bolts on the side of the legislative flange. When repairing, remove the bolts and pull open the tail cover for repair. The side of the sealing flange is connected to the connecting sleeve, and the lower end of the connecting sleeve has an ash hopper. Weld the cone flange on the other side of the connecting sleeve; drill a hole in the center of the cone flange. Install the bottom scale, tighten it with nuts, press in the high-temperature composite plate, and then press the protective plate and tighten it with nuts. Put a hook every one meter. The wire rope is wound around one and a half times, the left wire rope is wound around the right side, passed through the pulley and hung with a counterweight, and the right wire rope is wound around the left side, passed through the pulley and hung with a counterweight; when repairing, remove the bolts of the connecting flange and the kiln tail cover flange, and the trolley can be pulled open at any time without moving the entire sealing device. When replacing the chute, just move the other kiln tail chute over and bolt it; When in use, dusty flue gas is discharged from the rotary kiln tail pipe 1. A kiln body fixing ring 6 is welded at the kiln tail to prevent dusty flue gas from overflowing. A built-in sealing device 3 is added. The built-in sealing device 3 is fixed on the sealing cover 2 and placed on the dynamic friction ring 7 to play a primary sealing role. The dynamic friction ring 7 is connected to the kiln tail. A flange seat 4 is welded on the upper part of the sealing cover 2 to fix the three-layer sealing device 5. The three-layer sealing device 5 is placed on the kiln body fixing ring 6 to play a secondary sealing role. The outside of the three-layer sealing device 5 is fixed with a compression wire rope 8, and the lower part of the compression wire rope is connected to a counterweight block 9; After the dusty flue gas at the tail of the kiln is sealed and treated, it needs to be led out to a wear-resistant and high-temperature resistant dust collector for treatment. The flue gas is led out from the tail pipe 1 of the rotary kiln, introduced into the inlet 10 of the wear-resistant and high-temperature resistant dust collector through the dust collecting flue, and the flue gas inlet filter chamber 15, filtered through the metal filter element 12, and the purified flue gas is discharged into the clean air chamber 13 through the inside of the metal filter element 12, and then discharged through the flue outlet flue 14. The dust collected on the surface of the metal filter element 12 is backblown into the dust collecting hopper 16 by the cleaning system 11, and then the dust is discharged centrally.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealed dust removal device for a rotary kiln tail, comprising a rotary kiln tail pipe (1) and a dust collector, wherein a wear-resistant and high-temperature resistant dust collector inlet (10) is arranged on the left side of the dust collector; Features: The outer fixed sleeve at the left end of the rotary kiln tail pipe (1) is provided with a kiln body fixed ring (6); a conical sleeve is fixedly welded to the left side of the rotary kiln tail pipe (1); a dynamic friction ring (7) is provided on the left side of the conical sleeve; the right end of the dynamic friction ring (7) is sealed and connected to the conical sleeve via a flange; the interior of the dynamic friction ring (7) is connected to the interior of the conical sleeve; A sealing cover (2) is sleeved on the outer side of the dynamic friction ring (7), a connecting arc plate is fixedly provided on the bottom surface of the sealing cover (2), and a flange seat (4) is fixedly provided on the right end of the sealing cover (2); A three-layer sealing device (5) is provided between the flange seat (4) and the kiln body fixing ring (6), and the sealing cover (2) is connected to the wear-resistant and high-temperature resistant dust collector inlet (10) through a dust collecting flue.

2. A rotary kiln tail sealing dust removal device according to claim 1, characterized in that: A built-in sealing device (3) is provided on the inner side of the flange seat (4), and the built-in sealing device (3) is sleeved on the outer side of the dynamic friction ring (7). The inner side surface of the left end of the built-in sealing device (3) is in sealing and sliding contact with the surface of the dynamic friction ring (7), and the right end surface of the built-in sealing device (3) is sealed and fixedly connected to the inner wall of the flange seat (4).

3. A rotary kiln tail sealing dust removal device according to claim 2, characterized in that: The three-layer sealing device (5) comprises a sealing ring cover (51), wherein the sealing ring cover (51) is fixedly sleeved on the outer surface of the kiln body fixing ring (6), and a connecting ring seat (52) is fixedly sleeved on the left end of the sealing ring cover (51), and the left end of the connecting ring seat (52) is sealingly fixedly connected to the right end surface of the flange seat (4).

4. A rotary kiln tail sealing dust removal device according to claim 3, characterized in that: A circle of compression steel wire rope (8) is sleeved on the outer side of the sealing ring cover (51), a connecting ring is slidably sleeved on the compression steel wire rope (8), and the connecting ring is fixedly connected to the surface of the sealing ring cover (51), and a counterweight block (9) is fixedly connected to the bottom end of the compression steel wire rope (8).

5. The rotary kiln tail sealing dust removal device according to claim 1, characterized in that: A filter chamber (15) is provided inside the dust collector, and an ash collecting hopper (16) is provided below the filter chamber (15) at the bottom end of the dust collector, corresponding to the filter chamber (15), and the ash collecting hopper (16) is connected to the inside of the filter chamber (15).

6. A rotary kiln tail sealing dust removal device according to claim 5, characterized in that: A clean air chamber (13) is arranged above the filter chamber (15) at the top of the dust collector, and the clean air chamber (13) is connected to the inside of the filter chamber (15). An outlet flue (14) is arranged on the side of the dust collector and is connected to the inside of the clean air chamber (13).

7. A rotary kiln tail sealing dust removal device according to claim 6, characterized in that: A dust cleaning system (11) is fixedly arranged between the clean air chamber (13) and the filter chamber (15) inside the dust collector.

8. A rotary kiln tail sealing dust removal device according to claim 7, characterized in that: The filter chamber (15) is arranged in communication with the wear-resistant and high-temperature resistant dust collector inlet (10), and a metal filter element (12) is vertically fixedly arranged inside the filter chamber (15) at a position corresponding to the wear-resistant and high-temperature resistant dust collector inlet (10).

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