Cement clinker cooling and conveying structure

Abstract

The utility model discloses a cement clinker cooling and conveying structure. The cement clinker cooling and conveying structure comprises a stepping grate cooler, a loop chain machine and a large zipper machine, the stepping grate cooler is communicated with the large zipper machine through the discharging port, and cement materials are conveyed to the next procedure unit through the large zipper machine. And the loop chain machine is arranged at the bottom end of the stepping grate cooler, is used for collecting leaked materials of the stepping grate cooler, and is communicated with the large chain conveyor through a discharge pipe. According to the cement clinker cooling and conveying structure, leaked materials can be reliably conveyed through the loop chain machine, the problem of material leakage is thoroughly solved, and normal production cannot be affected by material leakage; the service life of inter-row sealing is relatively greatly prolonged, and the operation and maintenance cost is reduced; the operation of the cooling fan of the stepping grate cooler meets the process requirement, pressure maintaining or pressure difference is not needed, the cooling effect is better, and meanwhile power consumption can be better reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cement clinker conveying, and particularly relates to a cement clinker cooling and conveying structure. Background Technique

[0002] In the building materials industry, the fourth-generation walking grate cooler is widely used for cooling high-temperature clinker. The grate bed of the walking grate cooler is divided into multiple columnar units. First, all columnar units move forward together. Second, some columnar units move backward in batches. Finally, all columnar units retreat to the initial position. This movement process is called a cycle of the operation of the walking grate cooler. The grate bed can complete the forward conveying of the clinker after several cycles of the above movement. There are gaps and interlaced movements between the columnar units. Therefore, there is an inter-column seal between the columnar units to prevent the clinker on the grate bed from leaking into the lower air chamber of the grate. In addition, the cooling air enters the grate bed along the gaps of the grate plates to cool the high-temperature clinker. The high-temperature clinker particles are in a suspended state under the action of the cooling air, and their fluidity is very good, similar to a fluid, and it is very easy to leak into the air chamber from the gaps between the inter-column seals. In addition, the cooling air in the lower air chamber of the grate has a certain pressure, and there is also a large pressure difference between the air chambers. This pressure difference will also exacerbate the leakage of the clinker into the air chamber along the longitudinal direction.

[0003] At present, the common treatment methods for the easy leakage of the walking grate cooler are as follows: using a more precise method to cast the inter-column seal to reduce the gap, using a more complex seal structure and form, using more expensive wear-resistant materials to extend the service life, using a larger fan to maintain pressure to reduce leakage, etc. The above treatment methods will bring higher manufacturing costs and later operation and maintenance costs, and will also bring higher cooling power consumption, and even affect the normal process requirements and use of the cooling fan, that is, on the basis of considering the cooling effect, it is also necessary to take into account the role of maintaining pressure and preventing leakage.

[0004] Even if the above or other similar optimization schemes are adopted, the walking grate cooler will still leak to varying degrees in actual use. Especially after using for a period of time, the maze gap of the inter-column seal will become larger and larger, resulting in more and more serious leakage, so that the entire air chamber will be filled in a very short time, and even the situation of burning out the hydraulic oil pipe in the air chamber after the high-temperature clinker leaks will occur, which will then lead to the stop of the production line. It is necessary to replace the vulnerable inter-column seal spare parts and then manually clean the leaked materials, which is time-consuming and laborious and seriously affects production.

[0005] The main problems of the existing walking grate cooler are as follows:

[0006] 1. The walking grate cooler often leaks to varying degrees in actual use, and it needs to be manually cleaned after stopping the kiln, which affects production.

[0007] 2. The service life of the inter-column sealing device is relatively short. Moreover, as the usage time of the inter-column seal increases, the material leakage situation becomes more serious, requiring frequent replacement, resulting in high operation and maintenance costs.

[0008] 3. The structure of the inter-column seal is becoming increasingly complex, and the materials are also getting more expensive, leading to higher manufacturing and maintenance costs.

[0009] 4. To prevent material leakage, there are certain requirements for the air pressure difference between the cooling air chamber and the air chambers. However, this often affects the process requirements of the cooling fan, making it difficult to balance the two functions of cooling and maintaining pressure to prevent material leakage. At the same time, maintaining pressure will also bring higher additional cooling power consumption. Utility Model Content

[0010] The purpose of the present utility model is to disclose a cement clinker cooling and conveying structure in order to overcome the problems of the prior art. Through the structural arrangement of the cement clinker cooling and conveying structure of the present utility model, the material leakage problem of the traditional step grate cooler is solved.

[0011] The purpose of the present utility model is achieved through the following technical solutions:

[0012] A cement clinker cooling and conveying structure, the cement clinker cooling and conveying structure includes: a step grate cooler, a chain conveyor, and a large zipper conveyor;

[0013] The step grate cooler is connected to the large zipper conveyor through a feeding port, and the cement material is conveyed to the next process unit through the large zipper conveyor;

[0014] The chain conveyor is arranged at the bottom end of the step grate cooler, used to collect the material leakage of the step grate cooler, and is connected to the large zipper conveyor through a discharge pipe.

[0015] According to a preferred embodiment, a lock air discharge valve is provided between the chain conveyor and the discharge pipe.

[0016] According to a preferred embodiment, the material leakage inside the air chamber of the step grate cooler enters the chain conveyor through a hopper and / or an aggregate port.

[0017] According to a preferred embodiment, a lock air flap valve is provided between the hopper and the chain conveyor.

[0018] According to a preferred embodiment, a lock air structure is provided between the aggregate port and the chain conveyor.

[0019] According to a preferred embodiment, when the step grate cooler is connected to the chain conveyor through the aggregate port, two chain conveyors are provided at the bottom end of the step grate cooler, and the two chain conveyors are connected in series through a chute.

[0020] The main solution of the present utility model and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed by the present utility model. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present utility model, and all of them are the technical solutions to be protected by the present utility model, which will not be enumerated here.

[0021] Advantages of the present utility model:

[0022] The cement clinker cooling and conveying structure of the present utility model can reliably convey the leaking material through the chain wheel mechanism, completely solve the problem of leaking material, and will not affect the normal production due to the leaking material; relatively greatly improve the service life of the inter-column seal and reduce the operation and maintenance cost; the operation of the cooling fan of the step grate cooler returns to the process requirements, without the need for pressure maintenance or pressure difference, the cooling effect will be better, and at the same time, the power consumption can be further reduced. Description of the drawings

[0023] Figure 1 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0024] Figure 2 is Figure 1 the schematic cross-sectional structure diagram of A-A in

[0025] Figure 3 is Figure 1 the schematic cross-sectional structure diagram of B-B in

[0026] Figure 4 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0027] Figure 5 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0028] Figure 6 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0029] Figure 7 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0030] Figure 8 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0031] Figure 9 is a schematic structural diagram of an implementation of the cement clinker cooling and conveying structure of the present utility model;

[0032] Among them, 1 - central walking grate cooler, 2 - tail walking grate cooler, 3 - loop chain conveyor, 4 - hopper, 5 - aggregate outlet, 6 - large zipper conveyor, 7 - chute pipe, 8 - discharge pipe, 9 - feeding port, 10 - air lock discharge valve, 11 - air lock flap valve. Detailed implementation manners

[0033] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] It should be noted that: Similar reference numerals and letters indicate 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 subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In addition, the present utility model points out that in the present utility model, if the specifically involved structure, connection relationship, positional relationship, power source relationship, etc. are not specifically written, then the structure, connection relationship, positional relationship, power source relationship, etc. involved in the present utility model can be known to those skilled in the art on the basis of the prior art without creative labor.

[0039] Attached Figure 1 is a schematic structural view of the cement clinker cooling and conveying structure of the present utility model. If the chain conveyor of the present utility model is not designed, the clinker in the center-mounted step grate cooler 1 enters the large zipper conveyor 6 through the feeding port 9 and is conveyed to the next process, while the leakage in the air chamber of the step grate cooler needs to be collected manually at regular intervals and then manually transferred to the large zipper conveyor 6.

[0040] If the structure of the present utility model is adopted, the clinker on the air chamber of the center-mounted step grate cooler 1 will still enter the large zipper conveyor 6 through the feeding port 9 and be conveyed to the next process, but the leakage in the air chamber of the step grate cooler can enter the chain conveyor 3 through the ash hopper 4 or the aggregate port 5, and then be automatically conveyed into the discharge pipe 8 through the chain conveyor 3, and then enter the large zipper conveyor 6. The chain conveyor 3 is small in volume and high in conveying efficiency, which is convenient for layout.

[0041] A lock air flap valve 11 is designed between the ash hopper 4 and the chain conveyor 3, and there is also a lock air device in the aggregate port 5. The gap between the rings inside the chain conveyor 3 and the pipeline is extremely small, and it also has a good lock air effect. Therefore, there is no need to worry about the air leakage phenomenon caused by the pressure difference between the air chambers. There is a lock air discharge valve 10 between the chain conveyor 3 and the discharge pipe 8. When the chain conveyor 3 is running, the lock air discharge valve 10 is automatically opened, and when the chain conveyor 3 stops running, the lock air discharge valve 10 is automatically closed to avoid the leakage of materials or gases between the internal system of the grate cooler and the atmospheric environment.

[0042] Attached Figures 2-3 is a cross-sectional schematic view of the cement clinker cooling and conveying structure of the present utility model. In the A-A view, the ash hopper 4 is used to collect the leakage inside the air chamber. This design is convenient for collecting the leakage and can reduce the number of chain conveyors, but a certain layout height is required. In the B-B view, the aggregate port 5 is used to collect the leakage. The collection range of this aggregate port is limited, and the number of chain conveyors needs to be appropriately increased, but the layout height can be reduced. The above two aggregate devices can be flexibly selected according to the process requirements.

[0043] Attached Figures 4-7 is various layout diagrams of the cement clinker cooling and conveying structure of the present utility model. Figure 1 And Figure 4 The difference is that in the area where the chain conveyor 3 is arranged on a section of the grate bed, the front grate bed area of the step grate cooler often has no leakage or less leakage due to the existence of high-pressure air flow. Therefore, the chain conveyor can be selectively arranged in this area. Figure 5and Figure 6 There is no ash hopper 4, and the design layout of the aggregate inlet 5 is adopted entirely. Moreover, a chute pipe 7 is added to connect two chain conveyors 3 in series to convey materials.

[0044] Appendix Figures 8-9 is the layout drawing of the cement clinker cooling and conveying structure of the present utility model. For the tail-mounted step grate cooler 2, the height space at its bottom is generally not very abundant. Therefore, the form of the aggregate inlet 5 is often adopted to cooperate with the chain conveyor 3 for layout. The cooperation layout forms between the chain conveyor and the step grate cooler include but are not limited to the above several types.

[0045] In the cement clinker cooling and conveying structure of the present utility model, a new chain conveyor 3 is added in the step grate cooler to automatically convey the leakage material, and there is no need for manual kiln shutdown treatment.

[0046] The chain conveyor 3 of the cement clinker cooling and conveying structure of the present utility model can be provided with an ash hopper, which requires a certain height, and the number of chain conveyors in this working condition is relatively small. The chain conveyor can also be directly arranged in the original air chamber without the need for height, and the number of chain conveyors in this working condition is relatively large. For the working condition of multiple-stage grate beds, they can be arranged in series or in parallel. In short, under various working conditions, the chain conveyor has corresponding design and layout schemes.

[0047] The inter-column seal in the upper air chamber of the step grate cooler leaks more seriously with the aggravation of wear during use, and the seal needs to be replaced in time. However, in the cement clinker cooling and conveying structure of the present utility model, the chain conveyor can convey the leakage material in time, and there is no need to frequently replace the inter-column seal, which can save a large amount of operation and maintenance costs.

[0048] The chain conveyor of the cement clinker cooling and conveying structure of the present utility model can convey the leakage material automatically or manually, without using the pressure of the air chamber to cooperate with the inter-column seal to maintain high pressure to prevent leakage, nor worrying about problems such as leakage due to a large pressure difference between the front and rear air chambers. It enables the cooling fan to return to the essential work of process cooling, can better cool the clinker, and has lower cooling power consumption.

[0049] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cement clinker cooling and conveying structure, characterized in that: The cement clinker cooling and conveying structure comprises: a walking grate cooler, a ring chain machine (3) and a large zipper machine (6); The walking grate cooler is connected to the large zipper machine (6) via the discharge port (9), and the cement material is transported to the next process unit via the large zipper machine (6); The ring chain machine (3) is arranged at the bottom end of the walking grate cooler, is used to complete the collection of leaked materials from the walking grate cooler, and is connected to the large zipper machine (6) via a discharge pipe (8).

2. The cement clinker cooling and conveying structure according to claim 1, characterized in that: An air-locking discharge valve (10) is provided between the chain conveyor (3) and the discharge pipe (8).

3. The cement clinker cooling and conveying structure according to claim 1, characterized in that: The leaked material in the air chamber of the walking grate cooler enters the endless chain conveyor (3) through the ash hopper (4) and / or the material collection port (5).

4. The cement clinker cooling and conveying structure according to claim 3, characterized in that: An air-locking flap valve (11) is provided between the ash hopper (4) and the chain conveyor (3).

5. The cement clinker cooling and conveying structure according to claim 3, characterized in that: An air locking structure is provided between the material collecting port (5) and the chain conveyor (3).

6. The cement clinker cooling and conveying structure according to claim 3, characterized in that: When the walking grate cooler is connected to the chain conveyor (3) through the material collection port (5), Two chain conveyors (3) are arranged at the bottom end of the walking grate cooler, and the two chain conveyors (3) are connected in series via a slide pipe (7).

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