Grate cooler for cooling cement clinker

Abstract

The utility model provides a grate cooler for cooling cement clinker, and relates to the technical field of grate coolers, the grate cooler comprises a grate cooler body, the top of the grate cooler body is provided with a feeding box, one side of the feeding box is provided with a feeding port, and the bottom of the feeding box is provided with a discharging port communicated with the interior of the grate cooler body; a crushing assembly used for crushing cement clinker is arranged in the grate cooler body and located below the discharging port, a dust collecting assembly used for collecting dust in the feeding box is arranged on the feeding box, a heat exchange water tank is arranged in the feeding box, and a water inlet and a water outlet which extend out of the feeding box are formed in the heat exchange water tank. Dust carried or generated by cement clinker in the feeding box can be collected in time through the dust collecting assembly, pollution caused by the fact that the dust rushes out of the feeding port can be avoided, and heat dissipated by the cement clinker in the feeding box and heat released when the cement clinker is crushed by the crushing assembly can be used for heating media in the heat exchange water tank. And heat recycling is achieved, and energy waste is avoided.

Description

Technical Field

[0001] This application relates to the field of grate cooler technology, and more specifically, to a grate cooler for cooling cement clinker. Background Technology

[0002] In the clinker calcination system of a cement plant, the grate cooler is a key main equipment responsible for cooling and conveying cement clinker, as well as providing hot air for the rotary kiln and decomposition furnace. It is a crucial link in the heat recovery of the calcination system and helps reduce energy consumption.

[0003] Chinese Patent CN217275638U discloses a high-efficiency grate cooler for cooling cement clinker. By installing scraper plates inside the main body of the grate cooler, the cement clinker on the conveyor belt can be flattened during transport, preventing it from accumulating and thus improving the cooling efficiency. Furthermore, cylinders on both sides of the grate cooler body can extend push plates, preventing cement clinker from flowing out from the sides of the conveyor belt and causing leakage, thus improving its practicality. In addition, a negative pressure generated by a fan on the side wall of the grate cooler body allows the crushing rollers to suck the dust generated during crushing into a collection box through the dust suction port on the inner wall of the suction pipe, thus preventing dust from escaping from the feed inlet and causing pollution, improving its environmental friendliness.

[0004] However, in actual use, the aforementioned grate cooler releases a large amount of heat energy when the crushing roller crushes the cement clinker. The dust raised during the crushing operation carries this heat energy and is sucked into the collection box. The collection box lacks an effective heat recovery mechanism, causing this considerable amount of heat energy to be left idle and lost along with the dust, ultimately failing to be recycled and reused, resulting in serious energy waste. Summary of the Invention

[0005] The purpose of this application is to provide a grate cooler for cooling cement clinker, which can solve the technical problem that when existing grate coolers are used, the crushing rollers release a large amount of heat energy when crushing cement clinker, and the dust generated by crushing carries the heat energy and is sucked into the collection box. Since the collection box has no effective heat recovery mechanism, the heat energy can only be lost and cannot be recovered and reused, resulting in energy waste.

[0006] This application provides a grate cooler for cooling cement clinker, including a grate cooler body. The top of the grate cooler body has a feed box, a feed inlet on one side of the feed box, and a discharge port at the bottom of the feed box that communicates with the interior of the grate cooler body. A crushing assembly for crushing cement clinker is located below the discharge port within the grate cooler body. A grate bed for conveying the cement clinker is also located within the grate cooler body. A discharge outlet is located at the bottom of the grate cooler body. The grate bed has its feeding end located below the crushing assembly and its discharging end located above the discharge hopper. The grate cooler body is equipped with a cold air input assembly for inputting cold air into the grate cooler body. The top of the grate cooler body is equipped with a hot air recovery pipe. The feed box is equipped with a dust collection assembly for collecting dust in the feed box. The feed box is equipped with a hot water exchange tank, which has an inlet and an outlet extending to the outside of the feed box.

[0007] Furthermore, the dust collection assembly includes a dust collection hood, a dust collection pipe, a dust collection fan, and a dust collection box. The dust collection hood is fixed inside the feed box. One end of the dust collection pipe is connected to the dust collection hood, and the other end of the dust collection pipe passes through the heat exchange tank and extends to the outside of the feed box and is connected to the dust collection box. The dust collection fan is mounted on the dust collection pipe and located outside the feed box.

[0008] Furthermore, the crushing assembly includes a first crushing roller, a second crushing roller, a first crushing motor, and a second crushing motor. The first crushing roller and the second crushing roller are rotatably disposed inside the feed box. The first crushing motor and the second crushing motor are fixed on the outer wall of the feed box. One end of the first crushing roller extends outside the feed box and is connected to the output shaft of the first crushing motor. One end of the second crushing roller extends outside the feed box and is connected to the output shaft of the second crushing motor.

[0009] Furthermore, the grate cooler body is provided with multiple baffles, which divide the grate bed and the inner bottom of the grate cooler body into multiple air chambers. Multiple cold air input components are provided, and each cold air input component corresponds to one of the air chambers, and the cold air input components input cold air into the air chambers.

[0010] Furthermore, the cold air input assembly includes a cold air input pipe and a regulating valve. One end of the cold air input pipe is connected to the air chamber, and the other end of the cold air input pipe is used to connect to the refrigeration fan. The regulating valve is located on the cold air input pipe.

[0011] Furthermore, each of the aforementioned air chambers is equipped with a uniform air distribution net.

[0012] Furthermore, a rotary feed valve is provided at the discharge port of the discharge hopper.

[0013] The beneficial effects of this utility model are:

[0014] This invention equips the feeding box with a dust collection component, which can collect the dust carried or generated by the cement clinker in the feeding box in a timely manner, and can prevent dust from gushing out from the feeding port and causing pollution. A heat exchange tank is set in the feeding box, which can use the heat emitted by the cement clinker in the feeding box and the heat released by the cement clinker being crushed by the crushing component to heat the medium (such as water) in the heat exchange tank, so as to realize the recovery and utilization of heat and avoid energy waste. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0017] Figure 2 These are cross-sectional views of some embodiments of this application;

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Grate cooler body; 2. Feed box; 21. Feed inlet; 22. Discharge outlet; 3. Crushing assembly; 31. First crushing roller; 32. Second crushing roller; 4. Grate bed; 5. Discharge hopper; 6. Cold air input assembly; 61. Cold air input pipe; 62. Regulating valve; 7. Hot air recovery pipe; 8. Dust collection assembly; 81. Dust collection hood; 82. Dust collection pipe; 83. Dust collection fan; 84. Dust collection box; 9. Hot water exchanger tank; 10. Baffle; 11. Air chamber; 12. Air distribution net; 13. Rotary feed valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply 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 tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0027] like Figure 1 and Figure 2As shown, this application provides a grate cooler for cooling cement clinker, including a grate cooler body 1. A feed box 2 is provided at the top of the grate cooler body 1, with a feed inlet 21 on one side of the feed box 2. A discharge port 22, communicating with the interior of the grate cooler body 1, is provided at the bottom of the feed box 2. A crushing component 3 for crushing cement clinker is provided inside the grate cooler body 1, below the discharge port 22, to make the particle size of the cement clinker more suitable for subsequent processing and cooling operations. The grate cooler body 1 is equipped with a crushing component 3 for crushing cement clinker. The conveyor grate bed 4 is assembled from multiple rows of grate plates. For reference, the grate bed 4 in the fourth-generation walking beam grate cooler is model TCFC5500, which is existing technology and will not be described in detail here. The bottom of the grate cooler body 1 has a discharge hopper 5. The feeding end of the grate bed 4 is located below the crushing component 3, and the discharging end of the grate bed 4 is located above the discharge hopper 5. The grate cooler body 1 is equipped with a cold air input component 6 for inputting cold air into the grate cooler body 1. The cold air input component 6 inputs cold air into the grate cooler body 1. The cold air can fully exchange heat with the hot cement clinker, removing heat from the clinker and effectively cooling it. The top of the grate cooler body 1 is equipped with a hot air recovery pipe 7, which can recover the hot air generated after heat exchange with the cement clinker inside the grate cooler. This hot air can be transported to other stages that require heat, such as preheating raw materials, realizing heat reuse and reducing energy waste. The feed box 2 is equipped with a dust collection component 8 for collecting dust inside the feed box 2. The feed box 2 is equipped with a hot water exchange tank 9, which has an inlet and an outlet extending to the outside of the feed box 2. Through the dust collection component 8, dust carried or generated by the cement clinker inside the feed box 2 can be collected in a timely manner, preventing dust from gushing out from the feed inlet 21 and causing pollution. Through the hot water exchange tank 9, the heat emitted by the cement clinker inside the feed box 2 and the heat released by the crushing component 3 can be used to heat the medium (such as water) inside the hot water exchange tank 9, realizing heat recovery and utilization and avoiding energy waste.

[0028] like Figure 1 and Figure 2As shown, the dust collection assembly 8 includes a dust collection hood 81, a dust collection pipe 82, a dust collection fan 83, and a dust collection box 84. The dust collection hood 81 is fixed inside the feed box 2. One end of the dust collection pipe 82 is connected to the dust collection hood 81, and the other end of the dust collection pipe 82 passes through the heat exchange tank 9 and extends to the outside of the feed box 2, where it connects to the dust collection box 84. The dust collection fan 83 is mounted on the dust collection pipe 82 and located outside the feed box 2. The dust collection box 84 has an exhaust port, and a filter sponge is fixedly installed at the exhaust port to filter the dust in the airflow. When the dust collection fan 83 operates, it generates suction, which draws dust through the dust collection pipe. The dust collected by the dust collection hood 81 is continuously transported to the dust collection box 84 through the dust collection pipe 82. The dust collection pipe 82 transports dust-laden hot air (containing heat emitted by cement clinker and heat released by the crushing component 3). The heat is transferred to the hot water exchange tank 9, thereby heating the medium (such as water) inside the hot water exchange tank 9. The inlet of the hot water exchange tank 9 is located below the outlet of the hot water exchange tank 9. Water is continuously input through the inlet through an external pipe. After heat exchange, the water becomes hot water and flows out from the outlet. This hot water can be transported to the hot water demand process section through another external pipe.

[0029] like Figure 2 As shown, the crushing assembly 3 includes a first crushing roller 31, a second crushing roller 32, a first crushing motor (not shown in the figure), and a second crushing motor (not shown in the figure). The first crushing roller 31 and the second crushing roller 32 are rotatably disposed inside the feed box 2. The first crushing motor and the second crushing motor are fixed on the outer wall of the feed box 2. One end of the first crushing roller 31 extends to the outside of the feed box 2 and is connected to the output shaft of the first crushing motor. One end of the second crushing roller 32 extends to the outside of the feed box 2 and is connected to the output shaft of the second crushing motor. The first crushing motor and the second crushing motor independently drive their respective crushing rollers. Through the cooperation of the first crushing roller 31 and the second crushing roller 32, the crushing force is applied to the falling cement clinker, so that the clinker with large blocks and hard texture is crushed, increasing the contact area between the cement clinker and the cold air and improving the cooling effect.

[0030] like Figure 2 As shown, the grate cooler body 1 is equipped with multiple baffles 10, which divide the grate bed 4 and the inner bottom of the grate cooler body 1 into multiple air chambers 11. Multiple cold air input components 6 are provided, and each cold air input component 6 corresponds to one of the air chambers 11. The cold air input components 6 input cold air into the air chambers 11. Because the heat dissipation requirements of cement clinker in different areas of the grate cooler body 1 are different, the existence of multiple air chambers 11 allows the cold air input to be precisely matched with the characteristics of each area. The temperature of clinker near the feed end is extremely high, so the corresponding air chamber 11 increases the cold air input and increases the wind speed, which can quickly remove a large amount of heat. As the clinker moves towards the discharge end and the temperature decreases, the corresponding air chamber 11 flexibly reduces the cold air supply to avoid excessive cooling and energy waste, ensuring uniform and efficient cooling throughout the process, which conforms to the gradual temperature change law of cement clinker.

[0031] like Figure 2 As shown, the cold air input assembly 6 includes a cold air input pipe 61 and a regulating valve 62. One end of the cold air input pipe 61 is connected to the air chamber 11, and the other end of the cold air input pipe 61 is used to connect to the refrigeration fan. The regulating valve 62 is located on the cold air input pipe 61. The operator can control the amount of cold air entering the air chamber 11 through the regulating valve 62. When the clinker particle size is too large and the heat dissipation is slow, the cold air supply is increased; conversely, if the particle size is small and the heat dissipation is too fast, the cold air is appropriately reduced to maintain stable and efficient cooling operation.

[0032] like Figure 2 As shown, each air chamber 11 is equipped with a uniform air distribution net 12. The cooling of cement clinker requires cold air to penetrate the grate bed 4 and the material layer evenly to achieve efficient heat exchange. Without the uniform air distribution net 12, the cold air is prone to form concentrated airflow areas and dead corners in the air chamber 11, resulting in insufficient cooling of some clinker. The fine structure of the uniform air distribution net 12 can disperse and guide the cold air, so that the cold air blows evenly and vertically towards the grate bed 4, and then passes through the gaps between the grate plates of the grate bed 4 to cool the cement clinker on the grate bed 4.

[0033] like Figure 2 As shown, a rotary feeder valve 13 is provided at the discharge port of the discharge hopper 5. The rotary feeder valve 13 is in a good sealing state during normal operation, which can reduce air leakage at the discharge port and allow cement clinker to be discharged evenly from the discharge port of the discharge hopper 5. The rotary feeder valve 13 is existing technology and will not be described in detail here. Operators can select a suitable model of rotary feeder valve 13 according to actual needs. In this embodiment, the rotary feeder valve 13 is of type YJD-12.

[0034] 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 grate cooler for cooling cement clinker, characterized in that: The system includes a grate cooler body, a feed box at the top of the grate cooler body with a feed inlet on one side, a discharge port at the bottom of the feed box communicating with the interior of the grate cooler body, a crushing component for crushing cement clinker located below the discharge port inside the grate cooler body, a grate bed for conveying cement clinker inside the grate cooler body, a discharge hopper at the bottom of the grate cooler body, the feeding end of the grate bed located below the crushing component, the discharging end of the grate bed located above the discharge hopper, a cold air input component for inputting cold air into the grate cooler body, a hot air recovery pipe at the top of the grate cooler body, a dust collection component for collecting dust inside the feed box, a hot water exchange tank inside the feed box, and a water inlet and outlet extending outside the feed box.

2. The grate cooler for cooling cement clinker according to claim 1, characterized in that: The dust collection assembly includes a dust collection hood, a dust collection pipe, a dust collection fan, and a dust collection box. The dust collection hood is fixed inside the feed box. One end of the dust collection pipe is connected to the dust collection hood, and the other end of the dust collection pipe passes through the heat exchange tank and extends to the outside of the feed box and is connected to the dust collection box. The dust collection fan is mounted on the dust collection pipe and is located outside the feed box.

3. A grate cooler for cooling cement clinker according to claim 1, characterized in that: The crushing assembly includes a first crushing roller, a second crushing roller, a first crushing motor, and a second crushing motor. The first crushing roller and the second crushing roller are rotatably disposed inside the feed box. The first crushing motor and the second crushing motor are fixed on the outer wall of the feed box. One end of the first crushing roller extends outside the feed box and is connected to the output shaft of the first crushing motor. One end of the second crushing roller extends outside the feed box and is connected to the output shaft of the second crushing motor.

4. A grate cooler for cooling cement clinker according to claim 1, characterized in that: The grate cooler body is provided with multiple baffles, which divide the grate bed and the inner bottom of the grate cooler body into multiple air chambers. Multiple cold air input components are provided, and each cold air input component corresponds to one of the air chambers, and the cold air input components input cold air into the air chambers.

5. A grate cooler for cooling cement clinker according to claim 4, characterized in that: The cold air input assembly includes a cold air input pipe and a regulating valve. One end of the cold air input pipe is connected to the air chamber, and the other end of the cold air input pipe is used to connect to the refrigeration fan. The regulating valve is located on the cold air input pipe.

6. A grate cooler for cooling cement clinker according to claim 5, characterized in that: Each of the aforementioned air chambers is equipped with a uniform air distribution net.

7. A grate cooler for cooling cement clinker according to claim 1, characterized in that: A rotary feed valve is provided at the discharge port of the discharge hopper.

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