A clinker cooling structure for a grate cooler

Abstract

The utility model discloses a kind of clinker cooling structures for grate cooler, including grate and multiple cooling air chambers located below grate, the grate is formed by splicing several grate plates;The grate plate includes top plate and bottom plate fixedly connected by side plate from top to bottom, labyrinth air duct is formed between the top plate and bottom plate, multiple upper ventilation holes are opened on the top plate, multiple lower ventilation holes are opened on the bottom plate.The utility model is through the collaborative design of grate plate internal labyrinth air duct and staggered ventilation hole, forced cooling air uniformly penetrates clinker layer, improve the uniformity of clinker cooling, significantly improve heat recovery efficiency and clinker quality.Meanwhile, unique conical ventilation hole and aggregate chute structure effectively prevent fine material leakage, ensure system stable operation.Top plate wear-resistant grid design greatly enhances the wear resistance, prolongs the service life of equipment.The overall structure realizes the beneficial effects of efficient cooling, energy-saving operation and long-term durability.

Description

Technical Field

[0001] This utility model belongs to the field of grate cooler cooling technology, specifically relating to a clinker cooling structure for a grate cooler. Background Technology

[0002] The grate cooler is a key piece of equipment in a cement production line. Its main function is to rapidly cool and transport the high-temperature clinker (approximately 1200-1400℃) discharged from the rotary kiln. Efficient cooling not only helps to recover heat from the clinker and improve the system's thermal efficiency, but also improves the quality of the clinker and provides conditions for subsequent transportation and storage.

[0003] Existing grate coolers typically employ multi-chamber air supply and stepped grate structures. However, some problems still exist in actual operation:

[0004] Uneven cooling: Uneven distribution of clinker on the grate causes a "short circuit" in the cooling air, meaning that a large amount of air passes through areas with thin clinker layers or large gaps, while insufficient airflow occurs in areas with thicker clinker layers, creating a "red river" phenomenon (i.e., localized areas of high-temperature clinker that have not been cooled). This not only reduces heat recovery efficiency but may also damage downstream equipment.

[0005] High grate resistance and easy wear: Traditional grate structures have a simple structure and high ventilation resistance. To achieve a cooling effect, higher air pressure is required, which increases the energy consumption of the fan. At the same time, the high-temperature clinker causes severe erosion and wear on the grate, shortening the equipment life.

[0006] Fine material leakage: Fine powder in clinker can easily leak into the air chamber through the grate gaps, which not only increases the amount of cleaning work, but may also block the air duct and affect the distribution of cooling air.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] The purpose of this utility model is to provide a clinker cooling structure for a grate cooler, which is a clinker cooling structure with reasonable structure, high cooling efficiency and stable operation.

[0009] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0010] A clinker cooling structure for a grate cooler includes a grate bed and multiple cooling air chambers located below the grate bed. The grate bed is composed of several grate plates spliced ​​together. Each grate plate includes a top plate and a bottom plate fixedly connected from top to bottom via side plates. A labyrinthine air duct is formed between the top plate and the bottom plate. Multiple upper ventilation holes are provided on the top plate, and multiple lower ventilation holes are provided on the bottom plate. The multiple upper ventilation holes and multiple lower ventilation holes are staggered in the vertical direction and connected through the labyrinthine air duct. A clinker collection assembly is provided at the grate seam formed at the joint of the grate plates. Each cooling air chamber includes a cooling chamber shell installed at the bottom of the grate plate and an air conveying assembly installed at the bottom of the cooling chamber shell.

[0011] In one or more embodiments of this utility model, the labyrinthine air duct is formed by multiple flow guide baffles fixedly connected to the base plate, and the multiple flow guide baffles separate adjacent staggered upper and lower ventilation holes along the clinker travel direction.

[0012] In one or more embodiments of this utility model, a gap of 3 to 5 mm is provided between the upper end of the flow guide baffle and the bottom of the top plate.

[0013] In one or more embodiments of this utility model, the upper ventilation hole is configured as a tapered hole that is larger at the top and smaller at the bottom.

[0014] In one or more embodiments of the present invention, the upper surface of the top plate is integrally formed with a plurality of crisscrossing wear-resistant ridges, and the plurality of wear-resistant ridges form a wear-resistant grid on the top plate.

[0015] In one or more embodiments of the present invention, the clinker collection assembly includes a collection trough formed at the bottom of the grate splicing side wall, the collection trough being disposed at the bottom of the grate seam.

[0016] In one or more embodiments of the present invention, the clinker collection assembly further includes a discharge port opened at the bottom of the collection trough and a conveying pipe fixedly connected to the bottom of the discharge port, wherein the lower end of the conveying pipe passes through the bottom wall plate of the cooling chamber shell and is placed on the lower side.

[0017] In one or more embodiments of this utility model, the gas conveying assembly is installed on the upstream side of the cooling chamber shell in the clinker travel direction, so that the gas pressure gradually decreases when the gas conveying assembly flows in the cooling chamber shell along the clinker travel direction.

[0018] In one or more embodiments of the present invention, the air delivery assembly includes a plurality of jet nozzles mounted on the bottom wall panel of the cooling chamber housing at equal intervals and an air delivery pipe mounted on the air inlets of the plurality of jet nozzles.

[0019] In one or more embodiments of this utility model, an air inlet pipe is installed at the lower end of the air supply pipe, and a pressure regulating valve is installed on the air inlet pipe.

[0020] Compared with existing technologies, this invention utilizes a synergistic design of a labyrinthine air duct and staggered ventilation holes within the grate to force cooling air to penetrate the clinker layer evenly, improving the uniformity of clinker cooling and significantly enhancing heat recovery efficiency and clinker quality. Simultaneously, the unique conical ventilation holes and material collection trough structure effectively prevent fine material leakage, ensuring stable system operation. The wear-resistant mesh design of the top plate greatly enhances wear resistance and extends the equipment's service life. The overall structure achieves the beneficial effects of efficient cooling, energy-saving operation, and long-term durability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of a clinker cooling structure for a grate cooler according to an embodiment of the present invention;

[0023] Figure 2 This is a front cross-sectional view of a clinker cooling structure for a grate cooler according to an embodiment of the present invention;

[0024] Figure 3 This is a right-side cross-sectional view of a clinker cooling structure for a grate cooler according to an embodiment of the present invention;

[0025] Figure 4 This utility model Figure 2 A schematic diagram at point A in the middle;

[0026] Figure 5 This utility model Figure 3 A schematic diagram at point B in the middle;

[0027] Figure 6 This is a schematic diagram of the flow of cooling gas according to this utility model.

[0028] Explanation of key figure labels:

[0029] 100-Grate bed, 1-Grate plate, 11-Top plate, 12-Bottom plate, 13-Upper ventilation hole, 14-Lower ventilation hole, 15-Guide baffle, 16-Wear-resistant ridge, 17-Collection trough, 18-Discharge port, 19-Conveying pipe, 2-Cooling air chamber, 21-Cooling chamber shell, 22-Air nozzle, 23-Air conveying pipe, 24-Air inlet pipe, 25-Pressure regulating valve. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] like Figures 1-3 As shown, a clinker cooling structure for a grate cooler according to an embodiment of the present invention includes a grate bed 100 and multiple cooling air chambers 2 located below the grate bed 100. The grate bed 100 is composed of several grate plates 1 spliced ​​together. The grate plate 1 includes a top plate 11 and a bottom plate 12 fixedly connected from top to bottom through side plates. A labyrinth-type air duct is formed between the top plate 11 and the bottom plate 12. Multiple upper ventilation holes 13 are opened on the top plate 11, and multiple lower ventilation holes 14 are opened on the bottom plate 12. The multiple upper ventilation holes 13 and multiple lower ventilation holes 14 are staggered in the vertical direction and connected by the labyrinth-type air duct. A clinker collection component is provided at the grate seam formed at the splicing point of the grate plate 1. The cooling air chamber 2 includes a cooling chamber shell 21 installed at the bottom of the grate plate 1 and an air conveying component installed at the bottom of the cooling chamber shell 21.

[0032] Preferably, the grate 1 is integrally formed by the top plate 11, the bottom plate 12 and the front and rear wall plates, so as to form a cavity in the grate 11, thereby setting a labyrinth-type air duct through the cavity in the grate 11.

[0033] In operation, the clinker cooling structure for the grate cooler supplies cooling gas to the air conveying assembly via a high-pressure fan. The assembly then delivers the cooling gas into the cooling chamber shell 21. The cooling air within the shell enters the grate 1 through multiple lower ventilation holes 14. Inside the grate 1, the cooling gas is guided and pressurized by a labyrinthine air duct, and then evenly ejected from multiple upper ventilation holes 13. This cooling gas penetrates the clinker layer above, achieving cooling. Due to the high and stable resistance provided by the labyrinthine air duct, the air pressure automatically balances, preferentially penetrating areas with thicker material layers and higher temperatures, achieving uniform cooling. The cooled clinker is then conveyed away, while the hot air is recycled. Fine material leaking through the grate openings is effectively isolated and collected by the clinker collection assembly, preventing leakage into the air chamber and avoiding duct blockage.

[0034] like Figure 2 and Figure 6As shown, the labyrinthine air duct is formed by multiple flow guide baffles 15 fixedly connected to the base plate 12. The multiple flow guide baffles 15 separate the adjacent staggered upper ventilation holes 13 and lower ventilation holes 14 along the clinker travel direction.

[0035] like Figure 2 and Figure 6 As shown, a gap of 3-5 mm is provided between the upper end of the flow guide baffle 15 and the bottom of the top plate 11, so that under the action of the flow guide baffle 15, the path of the cold gas entering the labyrinth-type air duct is to move vertically upward after being discharged from the bottom plate 12. When the vertically upward flowing cooling gas collides with the top plate 11, it turns horizontally and then diffuses through the gap between the flow guide baffle 15 and the top plate 11. Finally, the cooling gas is sprayed vertically upward through the upper ventilation hole 13 to cool the clinker layer.

[0036] like Figure 2 and Figure 4 As shown, the upper ventilation hole 13 is designed as a tapered hole, wider at the top and narrower at the bottom. The tapered structure of the upper ventilation hole 13 creates a small jet effect, increasing the airflow velocity and allowing it to better penetrate and agitate the gaps between the clinker particles below, thus enhancing the heat exchange efficiency between gas and solid. At the same time, this structure greatly prevents the clinker particles from clogging the upper ventilation hole 13 during the cooling process.

[0037] like Figure 1 As shown, the upper surface of the top plate 11 is integrally formed with multiple crisscrossing wear-resistant ridges 16. The multiple wear-resistant ridges 16 form a wear-resistant grid on the top plate 11. The wear-resistant grid can improve the wear resistance of the top plate 11 when the clinker particles flow on the upper surface of the top plate 11. At the same time, the height of the wear-resistant ridges 16 is relatively small so that the setting of the wear-resistant ridges 16 has little impact on the flowability of the clinker on the top plate 11.

[0038] like Figure 3 and Figure 5 As shown, the clinker collection assembly includes a collection trough 17 located at the bottom of the side wall of the grate 1. The collection trough 17 is located at the bottom of the grate opening, so that fine particles entering the grate opening will flow down and be collected into the collection trough 17.

[0039] like Figure 3 and Figure 5 As shown, the clinker collection assembly also includes a discharge port 18 located at the bottom of the collection trough 17 and a conveying pipe 19 fixedly connected to the bottom of the discharge port 18. The lower end of the conveying pipe 19 passes through the bottom wall plate of the cooling chamber shell 21 and is positioned on the lower side. Fine clinker particles collected in the collection trough 17 are discharged through the discharge port 18 and then conveyed out through the conveying pipe 19, thereby preventing material in the grate from entering the air duct.

[0040] like Figure 2 and Figure 6As shown, the gas conveying assembly is installed on the upstream side of the cooling chamber shell 21 in the clinker traveling direction, so that the gas pressure gradually decreases as the gas conveying assembly flows in the cooling chamber shell 21 along the clinker traveling direction. Because the cooling chamber shell 21 is located on the upstream side, the gas pressure ejected from the upstream side is relatively high. Then, the high-pressure gas in the cooling chamber shell 21 is dispersed upward and downstream, and the gas pressure moving to the right gradually decreases, thereby making the cooling gas pressure discharged from the upstream side relatively high, so as to achieve efficient cooling of the high-temperature clinker on the upstream side, improve the uniformity of cooling gas distribution and cooling effect.

[0041] like Figure 2 and Figure 3 As shown, the gas delivery assembly includes multiple jet nozzles 22 installed at equal intervals on the bottom wall panel of the cooling chamber housing 21, and gas delivery pipes 23 installed on the air inlets of the multiple jet nozzles 22. The cooling gas provided by the gas delivery pipes 23 is delivered into the cooling chamber housing 21 through the multiple jet nozzles 22 in a uniformly distributed manner, so that the cooling gas flows uniformly in the clinker travel direction within the cooling chamber housing 21.

[0042] like Figure 2 and Figure 3 As shown, an air inlet pipe 24 is installed at the lower end of the air supply pipe 23, and a pressure regulating valve 25 is installed on the air inlet pipe 24. The pressure regulating valve 25 is connected to a high-pressure blower so that the cooling air provided by the high-pressure blower is delivered to the air supply pipe 23 through the pressure regulating valve 25, and the pressure of the cooling gas delivered by the pressure regulating valve 25 can be regulated by the air inlet pipe 24.

[0043] In operation, a high-pressure blower supplies cooling gas to the inlet pipe 24 for cooling the clinker. The inlet pipe 24 delivers the cooling gas to the cooling chamber shell 21. The cooling air inside the cooling chamber shell 21 enters the grate 1 through multiple lower ventilation holes 14. Within the grate 1, the cooling gas is guided and pressurized by a labyrinthine air duct formed by multiple guide baffles 15, and then evenly sprayed out from multiple upper ventilation holes 13. The cooling gas sprayed from the upper ventilation holes 13 can penetrate the clinker layer above, achieving cooling of the clinker layer. Due to the high and stable resistance provided by the labyrinthine air duct, the air pressure automatically balances, preferentially penetrating areas with thicker material layers and higher temperatures, achieving uniform cooling. The cooled clinker is conveyed away, and the hot air is recycled. Fine material leaking through the grate gaps is effectively isolated and collected by the clinker collection component, preventing fine material from leaking into the air chamber and avoiding air duct blockage.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clinker cooling structure for a grate cooler, characterized in that, It includes a grate bed and multiple cooling air chambers located below the grate bed, wherein the grate bed is composed of several grate plates spliced ​​together; The grate includes a top plate and a bottom plate fixedly connected from top to bottom by side plates. A labyrinthine air duct is formed between the top plate and the bottom plate. The top plate has multiple upper ventilation holes, and the bottom plate has multiple lower ventilation holes. The multiple upper ventilation holes and the multiple lower ventilation holes are staggered in the vertical direction and connected by the labyrinthine air duct. A clinker collection component is provided at the grate seam formed at the joint of the grate and the grate plate. The cooling chamber includes a cooling chamber shell installed at the bottom of the grate and an air supply assembly installed at the bottom of the cooling chamber shell.

2. The clinker cooling structure for a grate cooler according to claim 1, characterized in that, The labyrinthine air duct is formed by multiple flow guide baffles fixedly connected to the base plate. The multiple flow guide baffles separate the adjacent staggered upper and lower ventilation holes along the clinker travel direction.

3. A clinker cooling structure for a grate cooler according to claim 2, characterized in that, A gap of 3 to 5 mm is provided between the upper end of the flow guide baffle and the bottom of the top plate.

4. A clinker cooling structure for a grate cooler according to claim 1, characterized in that, The upper ventilation hole is designed as a tapered hole that is larger at the top and smaller at the bottom.

5. A clinker cooling structure for a grate cooler according to claim 1, characterized in that, The upper surface of the top plate is integrally formed with multiple crisscrossing wear-resistant ridges, which together form a wear-resistant grid on the top plate.

6. A clinker cooling structure for a grate cooler according to claim 1, characterized in that, The clinker collection assembly includes a collection trough located at the bottom of the grate splicing sidewall, and the collection trough is located at the bottom of the grate seam.

7. A clinker cooling structure for a grate cooler according to claim 6, characterized in that, The clinker collection assembly also includes a discharge port at the bottom of the collection trough and a conveying pipe fixedly connected to the bottom of the discharge port. The lower end of the conveying pipe passes through the bottom wall panel of the cooling chamber shell and is positioned on the lower side.

8. A clinker cooling structure for a grate cooler according to claim 1, characterized in that, The gas conveying assembly is installed on the upstream side of the cooling chamber shell in the direction of clinker travel, so that the gas pressure gradually decreases when the gas conveying assembly flows in the cooling chamber shell along the direction of clinker travel.

9. A clinker cooling structure for a grate cooler according to claim 8, characterized in that, The air delivery assembly includes multiple air nozzles installed at equal intervals on the bottom wall panel of the cooling chamber housing and air delivery pipes installed on the air inlets of the multiple air nozzles.

10. A clinker cooling structure for a grate cooler according to claim 9, characterized in that, An air inlet pipe is installed at the lower end of the air supply pipe, and a pressure regulating valve is installed on the air inlet pipe.

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