Calcining furnace feed port dynamic and static seal following device capable of reducing alkali powder leakage

Abstract

The invention discloses a calcining furnace feeding port dynamic and static seal following device capable of reducing alkali powder leakage. A fixed flange seat is connected to the outer wall of a material injection pipe of a material injection mechanism, and the material injection pipe of the material injection mechanism extends into a feeding pipe of a furnace body; the static ring seat is connected to the inner wall of the fixed flange seat, the static ring seat wraps the static ring support, the static ring support is in sliding fit with the inner side of the static ring seat, and an elastic piece is connected between the static ring support and the static ring seat; the static ring is connected to the static ring support, and the sealing face of the static ring and the sealing face of the rotating ring slide relatively. The movable ring seat is connected to the outer wall of a feeding pipe opening of the furnace body, a movable ring support is connected to the movable ring seat, and the rotating ring is connected to the movable ring support; the first gap, the second gap, the third gap and the fourth gap jointly form a labyrinth structure, and the gaps are at least connected with an elastic baffle ring. The sealing device can effectively reduce alkali powder entering the friction contact surface of the movable ring and the static ring, enhances the sealing effect, prolongs the service life of the movable ring and the static ring of the calcining furnace, and effectively prevents alkali powder leakage and environmental pollution.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a dynamic and static sealing follower device for a calcining furnace feed port for reducing alkali powder leakage. Background Art

[0002] In the process of producing soda ash by the ammonia-soda method, the function of the calciner is to heat the mixture of sodium bicarbonate produced by the carbonization tower and the return alkali after passing through the filter through a heating system (such as steam heating), so that the sodium bicarbonate is gradually decomposed into sodium carbonate, which is soda ash.

[0003] The soda ash calciner is powered by an external electric motor, which meshes with gears mounted on the furnace. However, in practice, wear on the gear rings and gears is unavoidable. Furthermore, the calciner is typically installed at a 2-3% inclination, axial forces generated by the furnace's weight and friction, and deformation of the rollers due to uneven heating can all cause the furnace to vibrate, less than one centimeter, during operation. This unavoidable vibration is unavoidable.

[0004] Therefore, a tolerance of approximately one centimeter is required at the joints between the furnace body and the feed mechanism to ensure that the components do not collide and become damaged due to vibration. This design allows the alkali powder inside the furnace body to enter the vicinity of the dynamic and static rings through the remaining gaps during operation. When these fine alkali powders enter the contact surface of the dynamic and static rings, they increase friction and damage the smoothness of the contact surface, resulting in accelerated wear of the rings, which in turn causes leakage, resulting in product waste and environmental pollution. Summary of the Invention

[0005] The object of the present invention is to provide a dynamic and static sealing follower device for the feeding port of a calcining furnace which reduces the leakage of alkali powder. The first gap, the second gap, the third gap and the fourth gap form a simple maze structure, which can prolong the path and time for the alkali powder in the furnace body to penetrate into the dynamic and static rings, and by arranging an elastic retaining ring in the gap, it can be realized that when the furnace body jumps, it deforms and then returns to its original state, thereby effectively reducing the alkali powder from entering the contact surface of the dynamic and static rings, enhancing the sealing effect, extending the service life of the dynamic and static rings of the calcining furnace, and effectively preventing the leakage of alkali powder and environmental pollution, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A dynamic and static sealing follower device for the feed port of a calcining furnace for reducing alkali powder leakage comprises a fixed flange seat connected to the outer wall of a feed pipe of a feed mechanism, the feed pipe of the feed mechanism extends into the feed pipe of the furnace body, and a first gap is left between the outer circumference of the feed pipe and the inner circumference of the feed pipe, a second gap is left between the fixed flange seat and the outer opening of the feed pipe; a static ring seat is connected to the inner wall of the fixed flange seat, a third gap is left between the static ring seat and the outer circumference of the feed pipe, and a fourth gap is formed between the static ring seat and the dynamic ring seat; a static ring bracket, a static ring seat The static ring bracket is wrapped and slidably fitted on the inner side of the static ring seat, and an elastic part is connected between the static ring bracket and the static ring seat; the static ring is connected to the static ring bracket, and the sealing surface of the static ring and the sealing surface of the rotating ring slide relative to each other; the dynamic ring seat is connected to the outer wall of the furnace body feed pipe port, the dynamic ring bracket is connected to the dynamic ring seat, and the rotating ring is connected to the dynamic ring bracket; the first gap, the second gap, the third gap and the fourth gap together form a maze structure, and at least one elastic retaining ring is connected to the first gap, the second gap and the third gap.

[0007] A further improvement of the present invention is that the stationary ring seat is in the shape of a circular ring as a whole, and is connected to the inner side of the circular ring-shaped fixed flange seat through a bolt and nut assembly, and the cross-section of the stationary ring seat is U-shaped to form a slide groove that wraps the stationary ring bracket, and the stationary ring bracket slides in the slide groove.

[0008] A further improvement of the present invention is that the elastic member is an array of springs distributed in a ring-shaped array between the stationary ring seat and the stationary ring bracket, with each group of springs consisting of at least two; a groove is provided on the stationary ring bracket, one end of the spring is accommodated in the groove, and the other end is connected to the stationary ring seat.

[0009] A further improvement of the present invention is that the stationary ring and the rotating ring are fixed to the stationary ring bracket and the rotating ring bracket by bolts, and the side opening of the stationary ring serves as an injection port for lubricating oil.

[0010] A further improvement of the present invention is that a metal elastic retaining ring A is connected between the inner opening of the feed pipe and the outer wall of the injection pipe. The cross section of the elastic retaining ring A is arc-shaped, and the elastic retaining ring A blocks the first gap.

[0011] A further improvement of the present invention is that a metal elastic retaining ring B is connected to the outer opening of the feed pipe, the cross section of the elastic retaining ring B is elliptical, and the elastic retaining ring B contacts the fixed flange seat, the static ring seat, and the injection pipe respectively to block the second gap.

[0012] A further improvement of the present invention is that a metal elastic retaining ring C is connected between the stationary ring seat and the outer circumferential surface of the feed pipe, the cross section of the elastic retaining ring C is arc-shaped, and the elastic retaining ring C blocks the third gap.

[0013] A further improvement of the present invention is that the elastic retaining rings are made of a thin sheet of titanium-nickel memory alloy material, and a ceramic layer is sprayed on the surface of the elastic retaining rings.

[0014] Beneficial effects of the present invention: The present invention provides a dynamic and static sealing follower device for a calcining furnace feed port for reducing alkali powder leakage. The first gap, the second gap, the third gap and the fourth gap form a simple maze structure. This structure can extend the path and time for the alkali powder in the furnace body to penetrate into the dynamic and static rings. By arranging an elastic retaining ring in the gap, the device can be deformed when the furnace body jumps and then restore to its original state, thereby effectively reducing the amount of alkali powder entering the contact surface of the dynamic and static rings, enhancing the sealing effect, extending the service life of the dynamic and static rings of the calcining furnace, and effectively preventing alkali powder leakage and environmental pollution.

[0015] The dynamic and static sealing following device for the calcining furnace feed inlet for reducing alkali powder leakage of the present invention changes the form of traditional dynamic and static ring sealing. The previous single exposed spring is used to achieve the function of the static ring closely following the dynamic ring. Instead, a static ring support seat is used to wrap the static ring bracket. This not only reduces the contact between the spring and the air and extends the service life of the spring, but also, through the double-layer spring structure, ensures that the static ring can closely follow the dynamic ring regardless of any vibration of the furnace body.

[0016] The invention discloses a calcining furnace feed inlet dynamic and static sealing follower device for reducing alkali powder leakage. The elastic retaining rings are made of thin titanium-nickel memory alloy material, which is convenient. The surfaces of the elastic retaining rings are sprayed with a ceramic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 It is a partial cross-sectional view of the present invention.

[0020] Figure 4 It is a schematic diagram of the maze structure of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the elastic retaining ring A of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the elastic retaining ring B of the present invention.

[0023] In the figure: 1-fixed flange seat, 2-injection pipe, 3-feeding pipe, 4-furnace body, 5-first gap, 6-second gap, 7-stationary ring seat, 8-third gap, 9-fourth gap, 10-stationary ring bracket, 11-stationary ring, 12-dynamic ring seat, 13-dynamic ring bracket, 14-rotating ring, 15-spring, 16-elastic retaining ring A, 17-elastic retaining ring B, 18-elastic retaining ring C. DETAILED DESCRIPTION

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: Figures 1 to 6 As shown, a dynamic and static sealing follower device for the inlet of a calcining furnace for reducing the leakage of alkali powder comprises a fixed flange seat 1, which is connected to the outer wall of the injection pipe 2 of the injection mechanism, the injection pipe 2 of the injection mechanism extends into the inlet pipe 3 of the furnace body 4, and a first gap 5 of one centimeter is left between the outer circumference of the injection pipe 2 and the inner circumference of the inlet pipe 3, a second gap 6 of one centimeter is left between the fixed flange seat 1 and the outer opening of the inlet pipe 3; a static ring seat 7 is connected to the inner wall of the fixed flange seat 1, a third gap 8 of one centimeter is left between the static ring seat 7 and the outer circumference of the inlet pipe 3, and a third gap 8 of one centimeter is formed between the static ring seat 7 and the dynamic ring seat 12. Fourth gap 9; static ring bracket 10, static ring seat 7 wraps static ring bracket 10, static ring bracket 10 slides on the inner side of static ring seat 7, and an elastic member is connected between static ring bracket 10 and static ring seat 7; static ring 11, connected to static ring bracket 10, the sealing surface of static ring 11 and the sealing surface of rotating ring 14 slide relative to each other; dynamic ring seat 12, connected to the outer wall of feed pipe 3 of furnace body 4, dynamic ring bracket 13 is connected to dynamic ring seat 12, and rotating ring 14 is connected to dynamic ring bracket 13; first gap 5, second gap 6, third gap 8 and fourth gap 9 together form a maze structure, see specifically Figure 4 In the red shaded areas, the first gap 5 , the second gap 6 , and the third gap 8 are connected with at least one elastic retaining ring.

[0026] The injection tube 2 of the injection mechanism of the present invention extends into the feed tube 3 of the furnace body 4. The reserved gaps between the injection tube 2, the feed tube 3, the static ring seat 7, the dynamic ring seat 12, and the fixed flange seat 1 form a simple maze structure. This structure can prolong the path and time for alkali powder in the furnace body 4 to penetrate the dynamic and static rings. In addition, the provision of an elastic retaining ring can achieve deformation when the furnace body 4 jumps and then return to its original state, thereby effectively reducing the possibility of alkali powder leakage.

[0027] The static ring seat 7 is annular as a whole, and is connected to the inner side of the annular fixed flange seat 1 through a bolt and nut assembly. The cross-section of the static ring seat 7 is U-shaped to form a slide groove that wraps the static ring bracket 10, and the static ring bracket 10 slides in the slide groove.

[0028] The elastic member is an array of springs 15 distributed in a ring-shaped array between the stationary ring seat 7 and the stationary ring bracket 10, with each group of springs 15 having at least two. The stationary ring bracket 10 is provided with an embedding groove, one end of the spring 15 is accommodated in the embedding groove, and the other end is connected to the stationary ring seat 7.

[0029] The present invention changes the form of traditional dynamic and static ring sealing. The previous single exposed spring 15 is used to achieve the function of the static ring 11 closely following the rotating ring 14. Instead, the static ring bracket 10 is wrapped with a static ring support seat. This not only reduces the contact between the spring 15 and the air, preventing them from contacting with the air and thus oxidizing, thereby extending the service life of the spring 15, but also, through the double-layer spring 15 structure, it is achieved that no matter in which direction the furnace body 4 jumps, the static ring 11 can closely follow the rotating ring 14, thereby ensuring its sealing.

[0030] The stationary ring 11 and the rotating ring 14 are fixed to the stationary ring bracket 10 and the rotating ring bracket 13 by bolts. The side opening of the stationary ring 11 serves as an injection port for lubricating oil.

[0031] A metal elastic retaining ring A16 connects the inner opening of the feed tube 3 to the outer wall of the injection tube 2. Its cross-section is a hook-shaped combination of a three-eighths arc and a rectangle. One end of the retaining ring A16 is welded to the inner wall of the furnace body 4, and the other end is welded to the outer wall of the injection tube 2. The retaining ring A16 seals the first gap 5. The radius of the circle surrounding the retaining ring A16 is slightly smaller than the size of the reserved gap, meaning less than one centimeter. This ensures that it does not interfere with the normal operation of the furnace body 4 and prevents alkali powder from entering the labyrinth structure if the furnace body 4 vibrates.

[0032] The elastic retaining rings are made of thin titanium-nickel memory alloy material, and the surface of the elastic retaining rings is sprayed with a ceramic layer.

[0033] Example 2: This example is a further improvement of Example 1. Specifically: A metal elastic retaining ring B17 is connected to the outer opening of the feed pipe 3. Its cross-section is elliptical and it contacts the fixed flange seat 1, the stationary ring seat 7, and the injection pipe 2 to seal the second gap 6. One side of the elastic retaining ring B17 is open, facilitating its welding to the outer opening of the feed pipe 3. Installation must be completed before the furnace body 4 and the injection pipe 2 are connected.

[0034] Apart from this, this embodiment is exactly the same as Embodiment 1 and will not be described in detail here.

[0035] Example 3: This example is a further improvement of Example 1. Specifically: A metal elastic retaining ring C18 is connected between the stationary ring seat 7 and the outer surface of the feed tube 3. Its cross-section is an arc-shaped circle, sealing the third gap 8. Its cross-section is a hook-shaped combination of a three-eighths arc and a rectangle. One end of the retaining ring C18 is welded to the stationary ring seat 7, and the other end is welded to the outer wall of the feed tube 3. The radius of the circle surrounding the retaining ring A16 is slightly smaller than the size of the reserved gap, meaning less than one centimeter. This ensures that the normal operation of the furnace body 4 is not interfered with and prevents alkali powder from entering the labyrinth structure if the furnace body 4 vibrates.

[0036] Apart from this, this embodiment is exactly the same as Embodiment 1 and will not be described in detail here.

[0037] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A dynamic and static sealing follower device for a calcining furnace feed port to reduce alkali powder leakage, characterized in that: include: A fixed flange seat (1) is connected to the outer wall of the injection pipe (2) of the injection mechanism, the injection pipe (2) of the injection mechanism extends into the feed pipe (3) of the furnace body (4), and a first gap (5) is left between the outer circular surface of the injection pipe (2) and the inner circular surface of the feed pipe (3), and a second gap (6) is left between the fixed flange seat (1) and the outer opening of the feed pipe (3); The stationary ring seat (7) is connected to the inner wall of the fixed flange seat (1), a third gap (8) is left between the stationary ring seat (7) and the outer circumferential surface of the feed pipe (3), and a fourth gap (9) is formed between the stationary ring seat (7) and the dynamic ring seat (12); A stationary ring bracket (10), the stationary ring seat (7) wraps the stationary ring bracket (10), the stationary ring bracket (10) is slidably fitted on the inner side of the stationary ring seat (7), and an elastic member is connected between the stationary ring bracket (10) and the stationary ring seat (7); A stationary ring (11) is connected to the stationary ring bracket (10), and a sealing surface of the stationary ring (11) slides relative to a sealing surface of the rotating ring (14); A dynamic ring seat (12) is connected to the outer wall of the inlet pipe (3) of the furnace body (4), a dynamic ring bracket (13) is connected to the dynamic ring seat (12), and a rotating ring (14) is connected to the dynamic ring bracket (13); The first gap (5), the second gap (6), the third gap (8) and the fourth gap (9) together form a labyrinth structure, and at least one elastic retaining ring is connected to the first gap (5), the second gap (6) and the third gap (8).

2. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed inlet according to claim 1, characterized in that: The static ring seat (7) is annular in shape as a whole, and is connected to the inner side of the annular fixed flange seat (1) through a bolt and nut assembly. The cross section of the static ring seat (7) is U-shaped to form a slide groove that wraps around the static ring bracket (10), and the static ring bracket (10) is slidably fitted in the slide groove.

3. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed inlet according to claim 1 or 2, characterized in that: The elastic member is an array of springs (15) distributed in an annular array between the stationary ring seat (7) and the stationary ring bracket (10), and each group of springs (15) has at least two springs; the stationary ring bracket (10) is provided with an embedding groove, one end of the spring (15) is accommodated in the embedding groove, and the other end is connected to the stationary ring seat (7).

4. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed inlet according to claim 1, characterized in that: The stationary ring (11) and the rotating ring (14) are fixed to the stationary ring bracket (10) and the rotating ring bracket (13) by bolts, and the side opening of the stationary ring (11) serves as an injection port for lubricating oil.

5. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed inlet according to claim 1, characterized in that: A metal elastic retaining ring A (16) is connected between the inner opening of the feed pipe (3) and the outer wall of the injection pipe (2). The cross section of the elastic retaining ring A (16) is arc-shaped, and the elastic retaining ring A (16) blocks the first gap (5).

6. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed port according to claim 1 or 5, characterized in that: The outer opening of the feed pipe (3) is connected to a metal elastic retaining ring B (17), the cross section of the elastic retaining ring B (17) is elliptical, and the elastic retaining ring B (17) is in contact with the fixed flange seat (1), the stationary ring seat (7), and the injection pipe (2) to seal the second gap (6).

7. The dynamic and static sealing follower device for reducing alkali powder leakage at the feed inlet of a calcining furnace according to claim 1 or 5, characterized in that: A metal elastic retaining ring C (18) is connected between the stationary ring seat (7) and the outer cylindrical surface of the feed pipe (3). The cross section of the elastic retaining ring C (18) is arc-shaped, and the elastic retaining ring C (18) blocks the third gap (8).

8. The dynamic and static sealing follower device for reducing alkali powder leakage at the calcining furnace feed port according to claim 1, characterized in that: The elastic retaining rings are all made of thin titanium-nickel memory alloy material, and the surface of the elastic retaining rings is sprayed with a ceramic layer.

Images