An all-oxygen rotary kiln sealing device

Abstract

The present invention relates to an all-oxygen rotary kiln sealing device, belonging to the technical field of rotary kilns. The all-oxygen rotary kiln sealing device is arranged on the outer side of the rotary cylinder body and includes a tensioning device, a rotary cover body, a fixed cover body and a static friction ring cover body; inside the sleeve of the fixed cover body, a brush and fish-scale steel sheets are respectively arranged; the rotary cover body is also fixed on the outer side of the rotary cylinder body, and a dynamic friction ring a is fixed on its upper part, and a dynamic friction ring b is fixed on its right side; a static friction ring cover body is also arranged on the outer side of the rotary cover body, and a static friction ring a and a static friction ring b are respectively arranged on its left and right sides; a tensioning device is installed on the outer side of the static friction ring cover body, and one end of the tensioning device abuts against the fixed cover body; a packing seal a and a packing seal b are also arranged on the outer side of the sleeve of the fixed cover body, an interval ring is arranged between the two, and the pressure is adjusted by a packing seal pressure adjusting device. The present invention can effectively ensure the application of the all-oxygen calcination rotary kiln.

Description

Technical Field

[0001] The present invention relates to a sealing device for an all-oxygen rotary kiln, belonging to the technical field of rotary kilns. Background Art

[0002] The all-oxygen calcination technology is one of the important energy-saving technologies in the cement industry at present. It can reduce the fuel ignition point, accelerate the fuel combustion speed, promote complete fuel combustion, increase the flame temperature, reduce the amount of flue gas after combustion, improve the heat utilization rate, and reduce the emission of waste gas nitrogen oxides. In an all-oxygen rotary kiln, high-concentration oxygen and carbon dioxide are introduced into the kiln drum, and air cannot enter to avoid nitrogen participating in chemical reactions, thereby reducing the generation of nitrogen oxides. For the cement calcination to achieve the all-oxygen calcination technology, the sealing form of the rotary kiln is a key technology. Since the temperature at the sealing part is high during the operation of the rotary kiln, and the cylinder body at the sealing part rotates and is accompanied by swinging and axial movement, it is very difficult to ensure that the seal does not leak air. Summary of the Invention

[0003] In order to overcome the technical problems in the background art, the present invention provides a sealing device for an all-oxygen rotary kiln, which adopts a sealing method of filling the gap with carbon dioxide gas to isolate air, can effectively guarantee the application of the all-oxygen calcination rotary kiln, and solve the sealing problem of the all-oxygen rotary kiln.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A sealing device for an all-oxygen rotary kiln is arranged outside the rotary cylinder body. The sealing device includes a tensioning device, a rotary cover body, a fixed cover body, and a static friction ring cover body; inside the sleeve of the fixed cover body, a brush and fish-scale steel sheets are respectively arranged; the rotary cover body is also fixed outside the rotary cylinder body, with a dynamic friction ring a fixed on its upper part and a dynamic friction ring b fixed on its right side; a static friction ring cover body is further arranged outside the rotary cover body, with a static friction ring a and a static friction ring b respectively arranged on its left and right sides; the static friction ring a is in close fit with the dynamic friction ring a, and the static friction ring b is in close fit with the dynamic friction ring b; a tensioning device is installed outside the static friction ring cover body, and one end of the tensioning device abuts against the fixed cover body. The tensioning device has a certain tension and provides a force for the static friction ring cover body to move away from the fixed cover body; packing seals a and b are further arranged outside the sleeve of the fixed cover body, with a spacer ring therebetween, and the pressure is adjusted by a packing seal pressure adjusting device; the outer rings of the packing seals a and b are connected to the bottom right side of the upper static friction ring cover body and slide axially along with the static friction ring cover body.

[0006] Further, the static friction ring cover body is also connected to a slightly positive pressure carbon dioxide gas source, and carbon dioxide enters the static friction ring cover body through the air inlet hole.

[0007] Further, the static friction ring housing is also provided with a vent hole c and a vent hole b, and the spacer ring is provided with a vent hole a; the vent hole c is located at the top of the static friction ring b on the right side of the static friction ring housing, and the vent hole b is located between the packing seal a and the packing seal b at the bottom of the static friction ring housing.

[0008] Further, carbon dioxide gas reaches the positions of the packing seal a and the packing seal b through the vent hole c, the vent hole b, and the vent hole a. When there is a tiny gap between the packing seal b and the outer side of the sleeve of the fixed housing, the carbon dioxide gas fills into the rotary kiln; when there is a tiny gap between the packing seal a and the outer side of the sleeve of the fixed housing, the carbon dioxide gas overflows, ensuring that air cannot enter the rotary kiln.

[0009] Further, the outer diameter ends of the brush and the fish scale steel sheet are fixed to the inner side of the sleeve of the fixed housing, and the inner sides of the brush and the fish scale steel sheet are closely attached to the outer diameter of the rotary cylinder body.

[0010] Further, when the rotary cylinder body axially moves, the static friction ring a and the dynamic friction ring a, and the static friction ring b and the dynamic friction ring b are closely attached; when the rotary cylinder body rotates and swings, the static friction ring a and the dynamic friction ring a, and the static friction ring b and the dynamic friction ring b remain attached and relatively slide.

[0011] Further, the all-oxygen rotary kiln sealing device is also provided with a friction ring lubrication system for providing lubricating oil to lubricate the sliding surfaces between the above-mentioned various friction rings.

[0012] Further, two static friction ring housing brackets are fixed to the fixed housing to restrict the static friction ring housing from rotating along the axis but capable of moving axially.

[0013] Further, the bottom of the static friction ring housing is provided with an ash discharge hole cover to clean the dust in the static friction ring housing.

[0014] Further, the seal pressure adjustment device is a bolt and nut pressing structure; the fixed housing is an L-shaped structure; the tensioning device is a cylinder, a hydraulic rod, a spring tensioning or a weight structure; the rotary housing is an L-shaped structure; the static friction ring housing is a door-shaped structure.

[0015] Compared with the prior art, the beneficial effects that the present invention can achieve are:

[0016] The present invention adopts a sealing method of filling gaps with carbon dioxide gas to isolate air, which can effectively ensure the application of the all-oxygen calcination rotary kiln. Among them, the two groups of friction ring end face pressing structures solve the rotation and yaw of the cylinder body. The two groups of packing seals solve the axial movement of the cylinder body. Carbon dioxide is filled between the two groups of friction rings and the two groups of packing seals to isolate the air entering the kiln. The brush and the fish scale steel sheet prevent fly ash from entering the sealing area. The present invention has broad application prospects and economic and technical effects. Brief Description of the Drawings

[0017] Figure 1 is an axonometric view of the all-oxygen rotary kiln sealing device of the present invention;

[0018] Figure 2 is Figure 1 the A-A cross-sectional view of;

[0019] Figure 3 is Figure 1 the side view of. Detailed Description of the Preferred Embodiment

[0020] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that all directional indications in this embodiment, such as up, down, left, right, front, back..., are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Combined Figures 1-3 As shown, a full-oxygen rotary kiln sealing device is disclosed in a specific embodiment of the present invention. It is arranged outside the rotary cylinder body 5 and includes a tensioning device 1, an L-shaped rotary cover body 4, an L-shaped fixed cover body 14, and a door-shaped static friction ring cover body 18.

[0026] As Figure 2 As shown, inside the sleeve of the fixed cover body 14, a brush 8 and a fish-scale steel sheet 6 are respectively arranged. The outer diameter ends of the brush 8 and the fish-scale steel sheet 6 are fixed inside the sleeve of the fixed cover body 14. The inner sides of the brush 8 and the fish-scale steel sheet 6 are closely attached to the outer diameter of the rotary cylinder body 5. Since the brush 8 and the fish-scale steel sheet 6 have elasticity, they can closely adhere to the rotary cylinder body 5 when the rotary cylinder body 5 swings and axially moves, playing a dust-proof role and preventing the fly ash in the kiln from entering the friction ring b and the packing seal b areas.

[0027] The rotary cover body 4 is also fixed outside the rotary cylinder body 5. A dynamic friction ring a3 is fixed on its upper part, and a dynamic friction ring b13 is fixed on its right side. The dynamic friction ring a3 and the dynamic friction ring b13 can rotate, swing, and axially move with the rotary cylinder body 5.

[0028] Outside the rotary cover body 4, a static friction ring cover body 18 is further arranged. A static friction ring a2 and a static friction ring b12 are respectively arranged on its left and right sides, and can axially slide along with the static friction ring cover body 18. The static friction ring a2 and the dynamic friction ring a3, and the static friction ring b12 and the dynamic friction ring b13 are closely attached. When the rotary cylinder body 5 axially moves, the static friction ring a2 and the dynamic friction ring a3, and the static friction ring b12 and the dynamic friction ring b13 are closely attached. When the rotary cylinder body 5 rotates and swings, the static friction ring a2 and the dynamic friction ring a3, and the static friction ring b12 and the dynamic friction ring b13 remain attached and relatively slide. The full-oxygen rotary kiln sealing device is also provided with a friction ring lubrication system 22 to provide lubricating oil to lubricate the sliding surfaces between the above-mentioned various friction rings.

[0029] A tensioning device 1 is installed outside the static friction ring cover body 18. One end of the tensioning device 1 abuts against the fixed cover body 14. The tensioning device 1 has a certain tension, providing a force for the static friction ring cover body 18 to move away from the fixed cover body 14. In this embodiment, a hydraulic rod structure is adopted.

[0030] On the outer side of the sleeve of the fixed cover 14, a packing seal a9 and a packing seal b10 are also provided. An interval ring 7 is provided between the two, and the pressure is adjusted by a packing seal pressure adjusting device 11, so that the packing seal a9 and the packing seal b10 are attached to the outer side of the sleeve of the fixed cover 14 and can slide axially. In this embodiment, the packing seal pressure adjusting device 11 adopts a bolt and nut pressing structure. The outer rings of the packing seal a9 and the packing seal b10 are connected to the right bottom of the static friction ring cover 18 on the upper side and slide axially along with the static friction ring cover 18.

[0031] As Figure 3 shown, the static friction ring cover 18 is also connected with a slightly positive pressure carbon dioxide gas source, and carbon dioxide enters the static friction ring cover 18 through the air inlet hole 20. When a tiny gap appears between the static friction ring a2 and the dynamic friction ring a3, part of the carbon dioxide gas overflows. When a tiny gap appears between the static friction ring b12 and the dynamic friction ring b13, part of the carbon dioxide gas fills into the rotary kiln.

[0032] In the static friction ring cover 18, a vent hole c17 and a vent hole b16 are provided, and a vent hole a15 is provided on the interval ring 7. The vent hole c17 is located at the top of the static friction ring b12 on the right side of the static friction ring cover 18, and the vent hole b16 is located at the position between the packing seal a9 and the packing seal b10 at the bottom of the static friction ring cover 18. The carbon dioxide gas reaches the position of the packing seal a9 and the packing seal b10 through the vent hole c17, the vent hole b16, and the vent hole a15. When a tiny gap appears between the packing seal b10 and the outer side of the sleeve of the fixed cover 14, the carbon dioxide gas fills into the rotary kiln. When a tiny gap appears between the packing seal a9 and the outer side of the sleeve of the fixed cover 14, the carbon dioxide gas overflows, ensuring that air cannot enter the rotary kiln.

[0033] As Figure 1 shown, two static friction ring cover brackets 19 are fixed on the fixed cover 14 to restrict the static friction ring cover 18 from rotating along the axis but can move axially.

[0034] In this embodiment, as Figure 3 shown, a dust discharge hole cover 21 is provided at the bottom of the static friction ring cover 18 to clean the dust in the static friction ring cover 18.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An all-oxygen rotary kiln sealing device is arranged outside the rotary cylinder body (5), and is characterized in that: The sealing device includes a tensioning device (1), a rotary cover body (4), a fixed cover body (14), and a static friction ring cover body (18); inside the sleeve of the fixed cover body (14), a brush (8) and fish-scale steel sheets (6) are respectively arranged; the rotary cover body (4) is also fixed on the outside of the rotary cylinder body (5), a dynamic friction ring a (3) is fixed on its upper part, and a dynamic friction ring b (13) is fixed on its right side; a static friction ring cover body (18) is also arranged on the outside of the rotary cover body (4), a static friction ring a (2) and a static friction ring b (12) are respectively arranged on its left and right sides; the static friction ring a (2) is in close contact with the dynamic friction ring a (3), and the static friction ring b (12) is in close contact with the dynamic friction ring b (13); a tensioning device (1) is installed on the outside of the static friction ring cover body (18), one end of the tensioning device (1) abuts against the fixed cover body (14), and the tensioning device (1) has a certain tension, providing a force for the static friction ring cover body (18) to move away from the fixed cover body (14); a packing seal a (9) and a packing seal b (10) are also arranged on the outside of the sleeve of the fixed cover body (14), a spacer ring (7) is arranged between them, and the pressure is adjusted by a packing seal pressure adjusting device (11); the outer rings of the packing seal a (9) and the packing seal b (10) are connected to the bottom right side of the upper static friction ring cover body (18) and slide axially along with the static friction ring cover body (18).

2. The all-oxygen rotary kiln sealing device according to claim 1, characterized in that: The static friction ring cover body (18) is also connected to a slightly positive pressure carbon dioxide gas source, and carbon dioxide enters the static friction ring cover body (18) through the air inlet hole (20).

3. The all-oxygen rotary kiln sealing device according to claim 2, characterized in that: An air permeation hole c (17) and an air permeation hole b (16) are also arranged inside the static friction ring cover body (18), and an air permeation hole a (15) is arranged on the spacer ring (7); the air permeation hole c (17) is located at the top of the static friction ring b (12) on the right side of the static friction ring cover body (18), and the air permeation hole b (16) is located between the packing seal a (9) and the packing seal b (10) at the bottom of the static friction ring cover body (18).

4. The all-oxygen rotary kiln sealing device according to claim 3, characterized in that: Carbon dioxide gas reaches the positions of the packing seal a (9) and the packing seal b (10) through the air permeation hole c (17), the air permeation hole b (16), and the air permeation hole a (15). When there is a tiny gap between the packing seal b (10) and the outside of the sleeve of the fixed cover body (14), the carbon dioxide gas fills into the rotary kiln; when there is a tiny gap between the packing seal a (9) and the outside of the sleeve of the fixed cover body (14), the carbon dioxide gas overflows, ensuring that air cannot enter the rotary kiln.

5. The all-oxygen rotary kiln sealing device according to claim 4, characterized in that: The outer diameter ends of the brush (8) and the fish-scale steel sheets (6) are fixed inside the sleeve of the fixed cover body (14), and the inner sides of the brush (8) and the fish-scale steel sheets (6) are closely attached to the outer diameter of the rotary cylinder body (5).

6. The all-oxygen rotary kiln sealing device according to claim 5, wherein: When the rotary cylinder body (5) axially moves, the static friction ring a (2) is in close contact with the dynamic friction ring a (3), and the static friction ring b (12) is in close contact with the dynamic friction ring b (13); when the rotary cylinder body (5) rotates and swings, the static friction ring a (2) and the dynamic friction ring a (3), and the static friction ring b (12) and the dynamic friction ring b (13) remain in contact and relatively slide.

7. The all-oxygen rotary kiln sealing device according to claim 6, characterized in that: The all-oxygen rotary kiln sealing device is also provided with a friction ring lubrication system (22) for providing lubricating oil to lubricate the sliding surfaces between the above-mentioned friction rings.

8. A full-oxygen rotary kiln sealing device according to claim 7, characterized in that: Two static friction ring housing brackets (19) are fixed on the fixed housing (14) to restrict the rotation of the static friction ring housing (18) along the axis but allow it to move axially.

9. The all-oxygen rotary kiln sealing device according to claim 1, characterized in that: A dust discharge hole cover (21) is provided at the bottom of the static friction ring housing (18) to clean the dust inside the static friction ring housing (18).

10. The all-oxygen rotary kiln sealing device according to claim 1, wherein: The sealing pressure adjustment device (11) is a bolt and nut pressing structure; the fixed housing (14) is an L-shaped structure; the tensioning device (1) is a cylinder, a hydraulic rod, a spring tensioning or a weight structure; the rotary housing (4) is an L-shaped structure; the static friction ring housing (18) is a door-shaped structure.

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