Clinker cooling machine for pure oxygen combustion process of cement kiln

Abstract

The utility model relates to the technical field of cement production equipment, and provides a clinker cooler for a cement kiln oxygen-fuel combustion process, which comprises a first cooling device, a roller crusher, an isolation device, a material level sensor, a second cooling device and a control device, the first cooling device and the second cooling device are communicated through a discharging channel; the first cooling device comprises a first shell, the roller type crusher is arranged in the first shell and located at an inlet of the discharging channel, the isolation device and the material level sensor are arranged in the discharging channel, and the material level sensor is located between the roller type crusher and the isolation device and used for obtaining the material level height in the discharging channel between the roller type crusher and the isolation device; the isolation device and the material level sensor are electrically connected with the control device, the control device is used for adjusting the opening degree of the isolation device based on the material level height, gas isolation between the first cooling device and the second cooling device is achieved through the sealing effect of clinker, and the subsequent trapping cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cement production equipment technology, and in particular to a clinker cooler for a cement kiln with an all-oxygen combustion process. Background Technology

[0002] The grate cooler in the cement industry is a crucial piece of equipment in the cement clinker calcination system. It performs functions such as clinker cooling, heat recovery, clinker conveying, and clinker crushing during the clinker production process. It supplies high-temperature secondary and tertiary air after heat exchange to the rotary kiln and preheater decomposition furnace, and transports excess high-temperature waste gas to a waste heat power generation system for recovery and power generation. Installing a high-temperature roller crusher within the grate cooler breaks down large clinker particles into smaller particles, facilitating better heat exchange, improving the cooling efficiency of the grate cooler, and reducing the temperature of the clinker exiting the grate cooler and the air volume required for cooling the clinker.

[0003] The all-oxygen combustion system requires the grate cooler to not only cool the clinker but also have the characteristics of multi-media precise air supply, independent zone cooling, independent segmented cooling, and good air tightness.

[0004] Chinese patent CN115183593A discloses a multi-media zoned air supply cooling system for a cement kiln with all-oxygen combustion. This system includes a first cooling zone and a second cooling zone, with a roller crusher and a high-temperature baffle wall positioned between them. The high-temperature baffle wall prevents cross-flow of air between the first and second cooling zones. However, this system has the following technical problems:

[0005] First, the roller crusher itself has certain gaps. When crushing unevenly fed materials, air will flow between the first and second cooling zones through the roller crusher. If the second cooling zone introduces air into the first cooling zone, nitrogen will enter the first cooling zone, causing nitrogen to enter the secondary and tertiary air, ultimately resulting in a high nitrogen concentration in the flue gas, which significantly increases the cost of carbon capture. Second, when there are many large pieces of clinker, the ambient temperature of the roller crusher is too high. Even if the rollers in the roller crusher are protected by water cooling, it will still affect their service life. Utility Model Content

[0006] This utility model provides a clinker cooler for the all-oxygen combustion process in cement kilns, which solves the problem that the roller crusher in the existing all-oxygen combustion process of cement kilns has gaps, which easily allow external nitrogen to enter the rotary kiln, leading to increased carbon capture costs.

[0007] This utility model provides a clinker cooler for an all-oxygen combustion process in a cement kiln, comprising: a first cooling device, a roller crusher, an isolation device, a material level sensor, a second cooling device, and a control device; the first cooling device and the second cooling device are connected through a discharge channel; the first cooling device includes a first housing, the roller crusher is disposed within the first housing and located at the inlet of the discharge channel, the isolation device and the material level sensor are disposed within the discharge channel, the material level sensor being located between the roller crusher and the isolation device, used to obtain the material level height within the discharge channel between the roller crusher and the isolation device; the isolation device and the material level sensor are respectively electrically connected to the control device, the control device being used to adjust the opening degree of the isolation device based on the material level height.

[0008] According to the present invention, a clinker cooler for a cement kiln using an all-oxygen combustion process further includes a feeding chute and a pushing assembly; the second cooling device includes a second housing and a conveying component, the conveying component being located at the bottom of the second housing between the inlet and outlet of the second housing; the inlet of the feeding chute is connected to the outlet of the discharge channel, the outlet of the feeding chute is connected to the inlet of the second housing, and the pushing assembly is located at the bottom of the second housing below the feeding chute, for pushing the clinker toward the conveying component.

[0009] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process is provided, wherein the pushing component is electrically connected to the control device, and the control device controls the operation of the pushing component based on the opening degree of the isolation device.

[0010] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process is provided. The pushing assembly includes a first driving member and a pushing plate, wherein the driving end of the first driving member is connected to the pushing plate.

[0011] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process is provided. The isolation device includes a partition and a second driving component. The second driving component is connected to the partition and is used to adjust the opening of the discharge channel.

[0012] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process further includes a cooling mechanism, which is disposed inside the first housing and located above the roller crusher, for spraying water toward the roller crusher.

[0013] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process further includes a temperature sensor, which is disposed inside the first housing and close to the roller crusher; the cooling mechanism and the temperature sensor are respectively electrically connected to the control device.

[0014] According to the present invention, a clinker cooler for a cement kiln oxy-fuel combustion process is provided. The first cooling device further includes a first fan. A cooling chamber is provided inside the first housing. The first fan is connected to the cooling chamber. The first fan is used to deliver a first cooling medium toward the cooling chamber.

[0015] According to the present invention, a clinker cooler for a cement kiln with an all-oxygen combustion process further includes a purification device. The air inlet of the purification device is connected to the air outlet of the cooling chamber, and the outlet of the purification device is connected to the inlet of the first fan. It is also used to connect with a collection device.

[0016] According to the present invention, a clinker cooler for a cement kiln oxy-fuel combustion process is provided. The second cooling device further includes a second fan, which is connected to the second housing and is used to deliver a second cooling medium into the second housing; and / or, it further includes a waste heat recovery device, wherein the top of the second housing is provided with an exhaust port, which is connected to the waste heat recovery device.

[0017] The clinker cooler for the all-oxygen combustion process in cement kilns provided by this utility model, based on the material level height, adjusts the opening of the isolation device through a control device to ensure that clinker is always present above the isolation device. The clinker itself acts as a seal to achieve gas isolation between the first and second cooling devices, preventing nitrogen from the air in the second cooling device from entering the combustion process. This allows for the generation of high-concentration carbon dioxide in the first cooling device, reducing the operating costs of subsequent capture, utilization, or storage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the clinker cooler for the all-oxygen combustion process in a cement kiln provided by this utility model;

[0020] Figure 2 This is a front view of the clinker cooler for the all-oxygen combustion process in a cement kiln provided by this utility model;

[0021] Figure label:

[0022] 10. First cooling device; 11. First fan; 20. Second cooling device; 21. Second fan; 22. Conveying component; 30. Roller crusher; 40. Isolation device; 50. Discharge channel; 60. Discharge chute; 70. Pushing assembly; 80. Cooling mechanism; 90. Purification device; 100. Collection device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0025] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and 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 the embodiments of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0029] The decomposition of limestone, a raw material used in cement production, releases a large amount of carbon dioxide. Additionally, coal, the primary energy source for cement kilns, also produces significant amounts of carbon dioxide during combustion. There are several ways to reduce carbon emissions in the cement industry: first, by using non-carbonate substitutes for raw materials, which is currently quite challenging; second, by reducing coal consumption and utilizing alternative fuels, but the current substitution effect is relatively small; and third, by carbon capture, with end-of-pipe carbon capture technology showing the most significant carbon reduction effect, but at a high cost. Using an oxy-fuel combustion process for carbon capture can significantly increase the carbon dioxide concentration in exhaust gases and reduce costs.

[0030] One of the main technical challenges of the all-oxygen combustion process is isolating the gas inside the clinker cooler and replacing air with high-purity oxygen for pulverized coal combustion. From an application perspective, the most difficult aspect is preventing nitrogen from entering the rotary kiln system via the clinker cooler, allowing only oxygen and pulverized coal to burn and produce carbon dioxide. Simultaneously, the raw materials decompose to produce carbon dioxide, ultimately yielding high-purity carbon dioxide with fewer impurities, thus facilitating cost reduction during subsequent carbon capture. Based on this, this utility model proposes a clinker cooler for the all-oxygen combustion process in a cement kiln. This cooler receives high-temperature clinker from the rotary kiln and cools it using a mixture of oxygen and carbon dioxide, finally discharging the cooled clinker. Throughout the cooling process, external nitrogen is prevented from entering the combustion process, which is beneficial for obtaining high-purity carbon dioxide, thereby reducing the operating costs of subsequent capture, utilization, or storage.

[0031] The following is combined with Figures 1-2 This invention describes a clinker cooler for a cement kiln's all-oxygen combustion process.

[0032] refer to Figure 1The clinker cooler for the all-oxygen combustion process in a cement kiln provided in this embodiment includes a first cooling device 10, a roller crusher 30, an isolation device 40, a material level sensor, a second cooling device 20, and a control device. The first cooling device 10 and the second cooling device 20 are connected through a discharge channel 50.

[0033] The first cooling device 10 includes a first housing, within which a roller crusher 30 is located at the inlet of the discharge channel 50. An isolation device 40 is located within the discharge channel 50. Alternatively, the roller crusher 30 can be located within the discharge channel 50, upstream of the isolation device 40, allowing clinker to fall onto the isolation device 40 after crushing by the roller crusher 30. A level sensor is located within the discharge channel 50, between the roller crusher 30 and the isolation device 40, to obtain the material level height within the discharge channel 50 between the roller crusher 30 and the isolation device 40. The opening of the isolation device 40 is adjusted based on the material level height. Specifically, the isolation device 40 and the level sensor are electrically connected to a control device. The control device obtains the material level height detected by the level sensor and, based on the material level height, adjusts the opening of the isolation device 40 to regulate the speed at which the clinker in the first device enters the second cooling device 20.

[0034] In actual use, initially, the isolation device 40 closes the discharge channel 50. The first shell can receive and cool the high-temperature clinker from the rotary kiln, and then convey the cooled clinker to the inlet of the discharge channel 50, which is then conveyed to the roller crusher 30 for crushing. The crushed clinker enters the discharge channel 50. The material level sensor detects the material level in the discharge channel 50 above the isolation device 40 in real time. When the material level is greater than or equal to the first preset height, the control device controls the opening of the isolation device 40 to increase, and the accumulated clinker falls into the second cooling device 20. When the material level in the discharge channel 50 above the isolation device 40 is within the preset height range, the control device controls the opening of the isolation device 40 to decrease, reducing the falling speed of the clinker and gradually increasing the amount of clinker above the isolation device 40. The maximum value of the preset height range is less than the first preset height, and the minimum value is greater than 0, ensuring that the clinker in the discharge channel 50 above the isolation device 40 is always greater than or equal to a certain height. That is, clinker is always present in the discharge channel 50 above the isolation device 40. The clinker itself acts as a seal to achieve gas isolation between the first cooling device 10 and the second cooling device 20, preventing nitrogen from the air in the second cooling device 20 from entering the combustion process. Adjusting the opening of the isolation device 40 can balance the material entering and exiting the channel 50, avoiding frequent opening and closing of the isolation device 40, improving reliability, and reducing maintenance costs. The clinker cooler for the all-oxygen combustion process in a cement kiln provided in this embodiment, based on the material level, adjusts the opening of the isolation device 40 through a control device to ensure that clinker is always present above the isolation device 40. The clinker itself acts as a seal to achieve gas isolation between the first cooling device 10 and the second cooling device 20, preventing nitrogen from the air in the second cooling device 20 from entering the combustion process. This allows for the generation of high-concentration carbon dioxide in the first cooling device, reducing the operating costs of subsequent capture, utilization, or storage.

[0035] The second cooling device 20 includes a second housing and a conveying component 22. The conveying component 22 is located at the bottom of the second housing, between the inlet and outlet of the second housing, and is used to convey the clinker in the second housing from the inlet to the outlet. The clinker cooler of the cement kiln's all-oxygen combustion process also includes a discharge chute 60 and a pushing assembly 70. The inlet of the discharge chute 60 is connected to the outlet channel 50, and the outlet of the discharge chute 60 is connected to the inlet of the second housing. The discharge chute 60 is used to guide the crushed clinker into the second cooling device 20. In one embodiment, an isolation device 40 is located inside the discharge chute 60, and a material level sensor is located between the roller crusher 30 and the isolation device 40 to detect the material level height between the isolation device 40 and the roller crusher 30. It should be noted that the roller crusher 30 can also be located in the discharge chute 60, above the isolation device 40.

[0036] Furthermore, the pusher assembly 70 is located at the bottom of the second housing, below the discharge chute 60. The pusher assembly 70 is used to push the clinker below the discharge chute 60 toward the conveyor 22, so as to prevent the clinker from accumulating below the discharge chute 60 and to provide space for the next discharge.

[0037] In this embodiment of the invention, there can be multiple feeding chutes 60, such as... Figure 2 As shown, the clinker discharged through the outlet of the discharge channel 50 can enter different discharge chutes 60, enabling rapid discharge, preventing accumulation, and ensuring high safety. Each discharge chute 60 is equipped with an isolation device 40, allowing for individual control and high safety. There are also multiple pushing components 70, each corresponding to a discharge chute 60. The number of discharge chutes 60 can be set according to actual needs, such as 3-6, for example, 3, 4, 5, or 6.

[0038] Furthermore, the pushing assembly 70 is electrically connected to the control device, and its operation is controlled based on the opening degree of the isolation device 40. When the opening degree of the isolation device 40 increases, the control device controls the pushing assembly 70 to push the clinker at the bottom of the second housing (below the discharge chute 60) towards the conveyor 22. When the opening degree of the isolation device 40 decreases, the control device controls the pushing assembly 70 to operate for a certain period of time and then close it, extending the life of the pushing assembly 70. The control device can also control the operation of the pushing assembly 70 based on the height of the clinker at the bottom of the second housing (below the discharge chute 60). It should be noted that the pushing speed of the pushing assembly 70 is the same as the conveying speed of the conveyor 22 to prevent clinker accumulation.

[0039] In one embodiment, the pushing assembly 70 includes a first driving member and a pusher plate. The driving end of the first driving member is connected to the pusher plate, and the first driving member drives the pusher plate to move toward the conveyor 22. It is understood that an angle exists between the pusher plate and the bottom surface of the second housing, which helps to gather the clinker and push it toward the conveyor 22. Optionally, the angle between the pusher plate and the bottom surface of the second housing is 60°, 45°, 30°, etc.

[0040] The isolation device 40 in this embodiment includes a partition and a second driving member. The partition is connected to the driving end of the second driving member, and the second driving member drives the first partition to move back and forth between an open position and a closed position. In the closed state, the outer periphery of the partition is in contact with the inner wall of the discharge channel 50. In the open state, there is a gap between the outer periphery of the partition and the inner wall of the discharge channel 50 to allow clinker to pass through. It should be noted that the gap can be adjusted according to actual conditions. In one embodiment, the partition is a telescopic plate, and the second driving member drives the telescopic plate to extend and retract to adjust the opening.

[0041] It should be noted that the isolation device 40 is made of a high-temperature resistant material, and the isolation device 40 has an internal cavity that can be cooled by air or water. Specifically, the partition has a cavity, the cooling mechanism is connected to the cavity, and can supply air or water into the cavity.

[0042] The clinker cooler of the cement kiln's all-oxygen combustion process also includes a cooling mechanism 80, which is located inside the first housing and above the roller crusher 30. The cooling mechanism 80 is used to spray water toward the roller crusher 30 to reduce the temperature of the roller crusher 30.

[0043] During the crushing process of cooled clinker by roller crusher 30, when the kiln condition fluctuates, the clinker feed is large, or there are many large pieces of clinker, the cooling mechanism 80 can be activated to spray water to cool roller crusher 30, ensuring continuous operation of the system, and also extending the service life of roller crusher 30, saving replacement and maintenance costs.

[0044] Furthermore, the clinker cooler of the cement kiln's all-oxygen combustion process also includes a temperature sensor. The temperature sensor is located inside the first housing, near the roller crusher 30. The cooling mechanism 80 and the temperature sensor are electrically connected to the control device. The control device is used to receive the temperature information acquired by the temperature sensor and control the operation of the cooling mechanism 80 based on the temperature information, adjusting the parameters of the cooling mechanism 80 to achieve rapid cooling.

[0045] The first cooling device 10 in this embodiment of the present invention further includes a first fan 11. A cooling chamber is provided inside the first housing. The inlet of the cooling chamber is connected to the outlet of the rotary kiln. The outlet of the cooling chamber is connected to the discharge channel 50. The high-temperature clinker of the rotary kiln enters the cooling chamber through the inlet of the first housing. The second fan 21 is connected to the cooling chamber and is used to transport a first cooling medium into the cooling chamber. The first cooling medium includes oxygen and carbon dioxide. After being cooled in the cooling chamber, the clinker is conveyed to the outlet and enters the second cooling device 20 through the discharge channel 50.

[0046] The clinker cooler of the cement kiln's all-oxygen combustion process also includes a purification device 90. The cooling chamber is also equipped with an air outlet, which is used to connect with the air inlet of the purification device 90. The outlet of the purification device 90 is connected with the inlet of the first blower 11. The gas (including carbon dioxide) in the first cooling device 10 enters the purification device 90 for treatment. The purified carbon dioxide enters the cooling chamber through the outlet of the purification device 90 and the inlet of the first blower 11 for recycling, providing the first cooling medium (carbon dioxide) for the first cooling device 10.

[0047] It should be noted that when the carbon dioxide concentration in the purification device 90 is too high, the outlet of the purification device 90 is also used to connect with the collection device 100, with part of the carbon dioxide entering the collection device 100 and part entering the cooling chamber.

[0048] The second cooling device 20 in this embodiment of the present invention further includes a second fan 21, which is connected to the second housing and is used to deliver a second cooling medium, such as air, into the second housing to further cool the clinker inside the second housing.

[0049] The clinker cooler of the cement kiln's all-oxygen combustion process also includes a collection device. The collection device is connected to the discharge port of the second shell through a discharge channel. A crusher is installed in the discharge channel to further crush the clinker in the second shell before discharging it.

[0050] The clinker cooler in the all-oxygen combustion process of a cement kiln also includes a waste heat recovery device. The second shell is equipped with an exhaust port, and the waste heat recovery device is connected to the exhaust port. The waste heat recovery device can collect heat for reuse. In one embodiment, an exhaust port is also provided at the top of the discharge channel. The waste heat recovery device includes a waste heat power generation mechanism, a heat exchanger, a drying and grinding system, a bag filter, etc.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A clinker cooler for a cement kiln using an all-oxygen combustion process, characterized in that, include: The device comprises a first cooling device, a roller crusher, an isolation device, a material level sensor, a second cooling device, and a control device; the first cooling device and the second cooling device are connected through a discharge channel. The first cooling device includes a first housing, the roller crusher is disposed inside the first housing and located at the inlet of the discharge channel, the isolation device and the material level sensor are disposed inside the discharge channel, the material level sensor is located between the roller crusher and the isolation device, and is used to obtain the material level height in the discharge channel between the roller crusher and the isolation device; The isolation device and the material level sensor are electrically connected to the control device, which is used to adjust the opening degree of the isolation device based on the material level height.

2. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 1, characterized in that, It also includes a feeding chute and a pushing assembly; the second cooling device includes a second housing and a conveying component, the conveying component being disposed at the bottom of the second housing, located between the inlet and outlet of the second housing; The inlet of the feeding chute is connected to the outlet of the discharge channel, and the outlet of the feeding chute is connected to the inlet of the second housing. The pushing assembly is located at the bottom of the second housing, below the feeding chute, and is used to push the clinker toward the conveyor.

3. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 2, characterized in that, The feeding assembly is electrically connected to the control device, and the control device controls the operation of the feeding assembly based on the opening degree of the isolation device.

4. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 2, characterized in that, The feeding assembly includes a first driving member and a pusher plate, wherein the driving end of the first driving member is connected to the pusher plate.

5. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 1, characterized in that, The isolation device includes a partition and a second driving component, the second driving component being connected to the partition and used to adjust the opening of the discharge channel.

6. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 1, characterized in that, It also includes a cooling mechanism, which is located inside the first housing and above the roller crusher, for spraying water toward the roller crusher.

7. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 6, characterized in that, It also includes a temperature sensor, which is located inside the first housing and close to the roller crusher; the cooling mechanism and the temperature sensor are respectively electrically connected to the control device.

8. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 1, characterized in that, The first cooling device further includes a first fan, and a cooling cavity is provided inside the first housing. The first fan is connected to the cooling cavity and is used to deliver a first cooling medium toward the cooling cavity.

9. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 8, characterized in that, It also includes a purification device, the air inlet of which is connected to the air outlet of the cooling chamber, the outlet of which is connected to the inlet of the first fan, and is also used to connect to a collection device.

10. The clinker cooler for the all-oxygen combustion process in a cement kiln according to claim 2, characterized in that, The second cooling device further includes a second fan, which is connected to the second housing and is used to deliver a second cooling medium into the second housing; And / or, it also includes a waste heat recovery device, wherein the top of the second housing is provided with an exhaust port, the exhaust port being connected to the waste heat recovery device.

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