Rotary kiln tail smoke chamber
By designing high-strength alloy material receiving components and receiving troughs in the cement kiln co-processing municipal solid waste production line, the problem of hard blocks in municipal solid waste eroding the flue chamber slope has been solved, extending its service life and ensuring the stable operation and safety of the production line.
Patent Information
- Application Number
- CN202520124839.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In cement kiln co-processing production lines for municipal solid waste, the impact and erosion of the flue gas chamber slope by stones, concrete blocks, and metal blocks mixed in with the municipal solid waste significantly shortens the service life of the castable refractory, which may cause the flue gas chamber shell to burn through and material to leak, affecting the stable operation of the system.
A rotary kiln tail flue chamber is designed, using a receiving component and a receiving trough made of high-strength, high-temperature resistant alloy material to form a protective layer, reducing the impact and wear of materials on the slope. A kiln tail sealing device prevents the leakage of high-temperature gas, and the slope angle is 50-60° to optimize material flow.
It extends the service life of the smoke chamber slope, reduces material wear on the slope, ensures stable and safe operation of the production line, and prevents kiln shutdown for maintenance.
Smart Images
Figure CN223726831U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rotary kiln, in particular to a rotary kiln tail smoke chamber. BACKGROUND
[0002] The kiln tail smoke chamber of a cement plant is a key process equipment connecting the rotary kiln and the decomposing furnace, which is very important in the cement manufacturing process. The slope part of the smoke chamber is usually constructed by using heat insulation materials and specific castable. The durability of the refractory material of the slope part is directly related to the stable operation of the entire firing system. In the production process, once the refractory material of the slope part is damaged, the ventilation area may be changed, which may affect the smooth entry of the material into the rotary kiln and cause interference to the system operation. If the damage is serious, the smoke chamber shell may be burnt due to high temperature, causing material leakage and eventually leading to kiln shutdown for maintenance.
[0003] Under normal circumstances, the service life of the slope part of the rotary kiln smoke chamber constructed by castable is about 3 to 5 years in a standard production line. However, in a production line using a cement kiln to cooperatively treat domestic waste, the service life of the castable of the slope part is significantly shortened due to the impact and erosion of the stone, concrete block and metal block mixed in the domestic waste. Such rapid damage often leads to the burning of the shell due to high temperature, material leakage, and thus the shutdown of the rotary kiln for maintenance. SUMMARY
[0004] The purpose of the embodiments of the present application is to provide a rotary kiln tail smoke chamber, which can solve the technical problem that the service life of the castable of the slope part is significantly shortened due to the impact and erosion of the stone, concrete block and metal block mixed in the domestic waste in a production line using a cement kiln to cooperatively treat domestic waste.
[0005] The embodiments of the present application provide a rotary kiln tail smoke chamber, which comprises a rotary kiln, a smoke chamber and a decomposing furnace. The smoke chamber is connected between the kiln tail of the rotary kiln and the bottom of the decomposing furnace. A neck is arranged between the smoke chamber and the decomposing furnace. A discharge pipe is arranged on the side of the smoke chamber. A slope is arranged at the bottom of the smoke chamber. A material receiving piece is arranged on the slope. A receiving groove for accommodating material is arranged on the material receiving piece.
[0006] The material receiving piece comprises a bottom plate, a plurality of horizontal plates and a plurality of vertical plates. The bottom plate is fixedly arranged on the slope. The horizontal plates and the vertical plates are fixedly arranged on the bottom plate. The horizontal plates and the vertical plates are staggered and combined to form a plurality of receiving grooves.
[0007] A kiln tail sealing device is arranged between the smoke chamber and the rotary kiln.
[0008] The side of the smoke chamber is provided with a material cleaning hole.
[0009] The slope has an inclination angle of 50-60 degrees.
[0010] The bottom plate is welded to the slope through the anchor, and the bottom plate, the horizontal plate and the vertical plate are all welded.
[0011] The material receiving part is made of high-strength and high-temperature-resistant alloy material.
[0012] The beneficial effects of the utility model are as follows:
[0013] The grate cooler provides hot air for the rotary kiln and the decomposing furnace, the high-temperature air enters the rotary kiln, and the coal powder is sprayed into the rotary kiln for combustion, the kiln tail exhaust gas enters the decomposing furnace cone through the smoke chamber of the rotary kiln tail, and the material entering the smoke chamber from the discharge pipe enters the rotary kiln along the slope, when the material falls on the material receiving part, part of the material will fall into the containing groove, the material staying in the containing groove will fill the containing groove, and the falling material will contact the material in the containing groove; the smoke chamber is provided with the material receiving part and the containing groove, so that part of the material falls into the containing groove, forms a protective layer, produces the effect of material grinding material, reduces the impact and wear of the material on the slope, and prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.
[0015] Fig. 1 It is a schematic view of the overall front structure in some embodiments of the present application;
[0016] Fig. 2 It is a sectional view of the smoke chamber front structure in some embodiments of the present application;
[0017] Fig. 3 It is a schematic view of the material receiving part structure in some embodiments of the present application.
[0018] The reference signs are as follows:
[0019] 1, rotary kiln;
[0020] 2, smoke chamber; 21, discharge pipe; 22, material cleaning hole;
[0021] 3. Decomposition furnace
[0022] 4. Necking
[0023] 5. Slope
[0024] 6. Material receiving member; 61, accommodating groove; 62, bottom plate; 63, transverse plate; 64, longitudinal plate
[0025] 7. Kiln tail sealing device
[0026] 8. Anchor DETAILED DESCRIPTION
[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0029] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0032] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] As shown in Figs. 1 to 3 The present application provides a rotary kiln tail smoke chamber, which comprises a rotary kiln 1, a smoke chamber 2 and a decomposing furnace 3, the smoke chamber 2 is communicated between the tail of the rotary kiln 1 and the bottom of the decomposing furnace 3, a necked opening 4 is arranged between the smoke chamber 2 and the decomposing furnace 3, a side of the smoke chamber 2 is communicated with a discharging pipe 21, and a slope 5 is arranged at the bottom of the smoke chamber 2, a receiving piece 6 is arranged on the slope 5, and a receiving groove 61 for accommodating materials is arranged on the receiving piece 6.
[0034] In use, the grate cooler provides hot air for the rotary kiln 1 and the decomposing furnace 3, high-temperature air enters the rotary kiln 1, and coal powder is injected into the rotary kiln 1 for combustion, the tail gas of the rotary kiln 1 enters the decomposing furnace 3 through the smoke chamber 2 at the tail of the rotary kiln 1, the materials entering the smoke chamber 2 from the discharging pipe 21 enter the rotary kiln 1 along the slope 5, and when the materials fall on the receiving piece 6, part of the materials will fall into the receiving groove 61, the materials staying in the receiving groove 61 will fill the receiving groove 61, and the subsequently falling materials will contact the materials in the receiving groove 61.
[0035] The smoke chamber 2 is provided with the receiving piece 6 and the receiving groove 61, so that part of the materials will fall into the receiving groove 61, forming a protective layer, producing a material grinding material effect, reducing the impact and wear of the materials on the slope 5, and prolonging the service life.
[0036] As shown in Fig. 2 and 3 In the present embodiment, the receiving piece 6 comprises a bottom plate 62, a plurality of transverse plates 63 and a plurality of longitudinal plates 64, the bottom plate 62 is fixedly arranged on the slope 5, the transverse plates 63 and the longitudinal plates 64 are fixedly arranged on the bottom plate 62, and the transverse plates 63 and the longitudinal plates 64 are staggered and combined to form a plurality of receiving grooves 61.
[0037] As shown in Fig. 1 In the present embodiment, a kiln tail sealing device 7 is arranged between the smoke chamber 2 and the rotary kiln 1; the kiln tail sealing device 7 effectively prevents the high-temperature gas and dust in the kiln tail smoke chamber 2 from leaking out, ensuring the safe and stable operation of the production line.
[0038] As shown in Fig. 1As shown, in this embodiment, a cleaning hole 22 is provided on the side of the smoke chamber 2; the cleaning hole 22 facilitates the cleaning of the inner wall of the smoke chamber 2, avoids blockage, improves the ventilation volume in the kiln, and reduces ventilation resistance.
[0039] In this embodiment, the inclination angle of the ramp 5 is 50-60° to optimize material flow and airflow distribution.
[0040] like Fig. 2 As shown, in this embodiment, an anchor 8 is provided between the base plate 62 and the slope 5. The base plate 62 is welded and fixed to the slope 5 by the anchor 8. The base plate 62 is fixed to the horizontal plate 63, the base plate 62 is fixed to the vertical plate 64, and the horizontal plate 63 is fixed to the vertical plate 64 by welding, which enhances the stability and durability of the slope 5 structure.
[0041] In this embodiment, the receiving component 6 is made of a high-strength, high-temperature-resistant alloy material, such as a nickel-based alloy or a cobalt-based alloy, to improve its high-temperature resistance and erosion resistance.
[0042] Working principle: When the rotary kiln tail flue chamber provided in this application is in use, the grate cooler provides hot air to the rotary kiln 1 and the decomposition furnace 3. The high-temperature air enters the rotary kiln 1, and at the same time, pulverized coal is injected into the rotary kiln 1 for combustion. The exhaust gas from the kiln tail enters the cone of the decomposition furnace 3 through the flue chamber 2 at the kiln tail of the rotary kiln 1. The material entering the flue chamber 2 from the feed pipe 21 enters the rotary kiln 1 along the slope 5. When the material falls onto the receiving part 6, some of the material will fall into the receiving trough 61. The material remaining in the receiving trough 61 will fill the receiving trough 61. Subsequently, the falling material will come into contact with the material in the receiving trough 61.
[0043] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A rotary kiln off-take hood, characterised in that: The application relates to a rotary kiln (1), a flue chamber (2) and a decomposing furnace (3), wherein the flue chamber (2) is arranged in communication between the kiln tail of the rotary kiln (1) and the bottom of the decomposing furnace (3), a necking (4) is arranged between the flue chamber (2) and the decomposing furnace (3), a discharging pipe (21) is arranged in communication at the side of the flue chamber (2), a slope (5) is arranged at the bottom of the flue chamber (2), a receiving member (6) is arranged on the slope (5), and a receiving groove (61) for accommodating materials is arranged on the receiving member (6).
2. A kiln tail gas box according to claim 1, characterised in that: The receiving member (6) comprises a bottom plate (62), a plurality of horizontal plates (63) and a plurality of vertical plates (64), the bottom plate (62) is fixedly arranged on the slope (5), the horizontal plates (63) and the vertical plates (64) are fixedly arranged on the bottom plate (62), and the horizontal plates (63) and the vertical plates (64) are staggered and combined to form a plurality of the receiving grooves (61).
3. A kiln tail hood according to claim 1, characterised in that: A kiln tail sealing device (7) is arranged between the flue chamber (2) and the rotary kiln (1).
4. A kiln tail hood according to claim 1, characterised in that: A material cleaning hole (22) is arranged at the side of the flue chamber (2).
5. A kiln tail hood according to claim 1 wherein: The inclination angle of the slope (5) is 50-60 degrees.
6. A kiln tail hood according to claim 2, characterised in that: An anchor (8) is arranged between the bottom plate (62) and the slope (5), the bottom plate (62) is welded and fixed on the slope (5) through the anchor (8), and the bottom plate (62), the horizontal plates (63) and the vertical plates (64) are all welded and fixed.
7. The kiln tail gas box according to claim 1, wherein: The receiving member (6) is made of high-strength and high-temperature-resistant alloy material.