Discharging cover structure of rotary kiln

Abstract

The utility model relates to a rotary kiln blanking cover structure, which belongs to the technical field of rotary kilns and particularly comprises a rotary kiln and a blanking cover mounted on the rotary kiln, an outward turning part is arranged at the blanking end of the rotary kiln, the blanking cover is sleeved on the outward turning part, and a dynamic sealing mechanism is arranged between the outward turning part and the blanking cover. According to the dynamic sealing rotary kiln, a dynamic sealing structure is adopted, the overall sealing effect is good, the structure is simple, the operation period is long, and the dynamic sealing rotary kiln is widely suitable for chemical rotary kilns for pyrolysis of coal, oil shale, biomass and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotary kiln discharging cover structure belongs to rotary kiln technical field. BACKGROUND

[0002] The most widely used sealing of rotary kiln is fish scale sealing and labyrinth sealing, which are completely suitable for cement kiln, lime kiln and other uses with less sealing requirements. However, for low-rank coal pyrolysis of rotary kiln, on the one hand, pyrolysis products cannot be discharged, otherwise environmental pollution will be caused, on the other hand, air cannot enter, otherwise safety problems such as explosion will be caused, therefore, the above sealing technology cannot meet the sealing requirements of chemical rotary kiln for low-rank coal pyrolysis, and new sealing technology needs to be developed to meet the stringent sealing requirements.

[0003] The utility model patent with publication number CN111141143A discloses a dynamic sealing structure and a rotary kiln, which cannot effectively control and meet the runout of the end part of the rotary kiln, and the structure of the patent is complex, the investment is large, and the practicality is poor. Therefore, it is urgent to develop a simple and practical rotary kiln sealing technology. UTILITY MODEL CONTENT

[0004] To solve the technical problems existing in the prior art, the utility model provides a rotary kiln discharging cover structure, which adopts a dynamic sealing structure, has good overall sealing effect, simple structure, long running period and is widely applicable to chemical rotary kilns for coal, oil shale, biomass pyrolysis and the like.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a rotary kiln discharging cover structure, which comprises a rotary kiln and a discharging cover installed on the rotary kiln, the discharging end of the rotary kiln is provided with an everted part, the discharging cover is sleeved on the everted part, and a dynamic sealing mechanism is arranged between the everted part and the discharging cover.

[0006] The rotary kiln, the discharging cover and the everted part are all provided with heat preservation materials.

[0007] Preferably, a heat dissipation interval is arranged between the everted part and the outer wall of the rotary kiln.

[0008] Preferably, the dynamic sealing mechanism comprises a fixed cylinder sleeved on the outside of the everted part and fixed on the discharging cover, and a first fixed ring and a second fixed ring installed on the inner wall of the fixed cylinder and sleeved on the outside of the everted part, a gap is left between the first fixed ring, the second fixed ring and the everted part, and the first fixed ring and the second fixed ring are filled with flexible sealing material.

[0009] Preferably, the inner side of the first fixed ring is provided with a movable ring through at least two adjusting jackscrews, the adjusting jackscrews are installed on the first fixed ring, and the flexible sealing material is arranged between the movable ring and the second fixed ring.

[0010] Preferably, the flexible sealing material is a graphite packing, a chevron rubber seal ring or a combination of the graphite packing and the chevron rubber seal ring.

[0011] Preferably, the first fixing ring and the second fixing ring are mounted on the outer wall of the everted portion, and gaps are left between the first fixing ring, the second fixing ring and the fixing cylinder.

[0012] Preferably, the everted portion is made of everted kiln skin or a welded everted structure.

[0013] Preferably, the downcomer cover structure is also applicable to a tail gas cover structure.

[0014] Compared with the prior art, the utility model has the following technical effects: the utility model discloses a dynamic sealing structure, through setting up rotary kiln everted kiln skin, forming good heat dissipation surface, and setting up rotary kiln skin and everted kiln skin, heat insulating material of downcomer cover, rotary kiln skin and everted kiln skin, fixing cylinder are coaxial, and almost do not deform, this creates better rigid condition for the realization of flexible sealing, then through setting up first fixing ring, second fixing ring, movable ring and fixing cylinder, and through setting up the position of movable ring of the top wire on first fixing ring, flexible sealing material is always filled in movable ring, second fixing ring, fixing cylinder and everted kiln skin, and better dynamic sealing is realized.Simultaneously, the graphite packing or chevron rubber seal ring with better elasticity is selected, so that dynamic sealing is more easily realized, and can operate for a long period. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] Figure 2 It is a structural schematic view of the utility model. Figure 1 It is a local enlarged view of A in the middle. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer, the utility model is further described in detail in combination with the drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0018] As shown in Figure 1 , Figure 2 A downcomer cover structure of a rotary kiln, which comprises a rotary kiln 1 and a downcomer cover 2 mounted on the rotary kiln 1, and the lower end of the rotary kiln 1 is provided with an everted portion 3, the downcomer cover 2 is sleeved on the everted portion 3, and a dynamic sealing mechanism is arranged between the everted portion 3 and the downcomer cover 2; the rotary kiln 1, the downcomer cover 2 and the everted portion 3 are all provided with heat insulating materials 4.

[0019] The utility model discloses a rotary kiln 1's end part sets up the outer turning part 3, and the outer turning part is made of kiln skin outer turning or makes the welding outer turning structure, and the outer turning part 3 turns to the middle part of rotary kiln, and is provided with dynamic sealing mechanism between the outer turning part 3 and the blanking cover 2, and the dynamic sealing mechanism can seal the blanking cover 2 and rotary kiln 1. Rotary kiln 1, blanking cover 2 and outer turning part 3 all are provided with heat preservation material 4, and this can avoid the rotary kiln body and the turning kiln skin heat deformation, and the sealing surface does not set the heat preservation layer, and the sealing surface is relatively in the outside, and the sealing flexible material blocks the heat transfer to the sealing surface. The outer wall between the outer turning part 3 and rotary kiln 1 is provided with the heat dissipation interval 5. Thus, the outer turning part 3 and rotary kiln 1 form the larger heat dissipation surface, further make the rotary kiln cylinder and the outer turning part keep lower temperature, prevent the outer turning part from producing the deformation.

[0020] Among them, the dynamic sealing mechanism includes the fixed cylinder 6 that is sleeved on the outer turning part 3 and is fixed on the blanking cover 2, and the first fixed ring 7 and the second fixed ring 8 that are installed on the inner wall of the fixed cylinder 6 and are sleeved on the outer turning part 3, the gap is left between the first fixed ring 7, the second fixed ring 8 and the outer turning part 3, and the flexible sealing material 9 is filled between the first fixed ring 7 and the second fixed ring 8. The flexible sealing material 9 is sealed between the blanking cover 2 and the outer turning part 3 by the fixed cylinder 6, the first fixed ring 7 and the second fixed ring 8.

[0021] In order to ensure that the flexible sealing material 9 always keeps the reliable sealing state during long time operation, the inner side of the first fixed ring 7 is provided with the movable ring 10 through at least two adjusting top screws 11, the adjusting top screws 11 are installed on the first fixed ring 10, and the flexible sealing material 9 is arranged between the movable ring 10 and the second fixed ring 8. The movable ring 10 moves to extrude the flexible sealing material 9 by the adjusting top screws 11, so as to ensure that the flexible sealing material 9 always keeps the reliable sealing state with the fixed cylinder 6 and the outer turning part 3. The flexible sealing material 9 can adopt graphite packing, herringbone rubber sealing ring or the combination of graphite packing and herringbone rubber sealing ring.

[0022] In addition, the blanking cover structure is also applicable to the tail gas cover structure. Embodiment two

[0023] In the embodiment, the first fixed ring 7 and the second fixed ring 8 are installed on the outer wall of the outer turning part 3, and the gap is left between the first fixed ring 7, the second fixed ring 8 and the fixed cylinder 6. The rest is the same as in embodiment one. Embodiment three

[0024] In the embodiment, the first fixed ring 7 is installed on the inner wall of the fixed cylinder 6, the second fixed ring 8 is installed on the outer wall of the outer turning part 3, the gap is left between the first fixed ring 7 and the outer turning part 3, and the gap is left between the second fixed ring 8 and the fixed cylinder 6. The rest is the same as in embodiment one. Embodiment four

[0025] In this embodiment, the second fixing ring 8 is installed on the inner wall of the fixing cylinder 6, the first fixing ring 7 is installed on the outer wall of the outward turning part 3, and a gap is left between the second fixing ring 8 and the outward turning part 3, and a gap is left between the first fixing ring 7 and the fixing cylinder 6. The rest is the same as in embodiment one.

[0026] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A structure of a rotary kiln and a downer, comprising a rotary kiln and a downer installed on the rotary kiln, characterized in that: The rotary kiln is provided with an outward turning part at a discharging end, and the discharging cover is sleeved on the outward turning part, and a dynamic sealing mechanism is arranged between the outward turning part and the discharging cover. The rotary kiln, the discharging cover and the outward turning part are all provided with heat insulating materials.

2. A rotary kiln under-distributor structure according to claim 1, characterised in that: A heat dissipation interval is arranged between the outward turning part and the outer wall of the rotary kiln.

3. A rotary kiln under-distributor structure according to claim 1 or 2, characterised in that: The dynamic sealing mechanism comprises a fixed cylinder sleeved on the outside of the outward turning part and fixed on the discharging cover, and a first fixed ring and a second fixed ring installed on the inner wall of the fixed cylinder and sleeved on the outside of the outward turning part, a gap is left between the first fixed ring, the second fixed ring and the outward turning part, and flexible sealing material is filled between the first fixed ring and the second fixed ring.

4. A rotary kiln under-distributor structure according to claim 3, wherein: The inner side of the first fixed ring is provided with a movable ring through at least two adjusting top screws, the adjusting top screws are installed on the first fixed ring, and the flexible sealing material is arranged between the movable ring and the second fixed ring.

5. A rotary kiln distribution hood structure according to claim 4 wherein: The flexible sealing material is graphite packing, herringbone rubber sealing ring or a combination of graphite packing and herringbone rubber sealing ring.

6. A rotary kiln under-distributor structure according to claim 3, wherein: The first fixed ring and the second fixed ring are installed on the outer wall of the outward turning part, and a gap is left between the first fixed ring, the second fixed ring and the fixed cylinder.

7. A rotary kiln distribution hood structure according to claim 1 wherein: The outward turning part is made of kiln skin outward turning or welded outward turning structure.

8. A rotary kiln under-distributor structure according to claim 3, wherein: The first fixed ring is installed on the inner wall of the fixed cylinder, the second fixed ring is installed on the outer wall of the outward turning part, a gap is left between the first fixed ring and the outward turning part, and a gap is left between the second fixed ring and the fixed cylinder.

9. A rotary kiln distribution hood structure according to claim 3 wherein: The second fixed ring is installed on the inner wall of the fixed cylinder, the first fixed ring is installed on the outer wall of the outward turning part, a gap is left between the second fixed ring and the outward turning part, and a gap is left between the first fixed ring and the fixed cylinder.

10. A rotary kiln under-distributor structure according to claim 3, wherein: The discharging cover structure is also applicable to the tail gas cover structure.

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