A cement kiln precalciner alternative fuel burner

Abstract

The utility model provides a kind of cement kiln precombustion furnace alternative fuel combustion device, the edge of the combustion step of cement kiln precombustion furnace is all extended and is equipped with extension tip, extension tip extends and covers the inside portion of the combustion step of lower layer, the inside of combustion step is equipped with air inlet hole located just below extension tip;Cement kiln precombustion furnace is equipped with gas supply system.The edge of combustion step is extended and forms extension tip, these extension tips are covered above the inside area of next layer combustion step.Each combustion step is equipped with air inlet hole, the position of air inlet hole is just below extension tip.Making primary air flow out from air inlet hole, directly into the sheltered area formed by extension tip, fully mixes with falling alternative fuel, provides stable, efficient initial combustion environment for fuel, improves ignition and combustion efficiency, and can effectively avoid fuel to fall on air inlet hole, can avoid air inlet hole blockage.

Description

Technical Field

[0001] This utility model relates to the field of fuel combustion device technology, and in particular to a fuel combustion device for a cement kiln pre-combustion furnace. Background Technology

[0002] Treating alternative fuels in cement kilns is a crucial way to achieve energy conservation and emission reduction, and the performance of the pre-combustion furnace, as a core piece of equipment, is paramount. In traditional stepped pre-combustion furnaces, alternative fuels tend to accumulate on the combustion steps during operation, affecting combustion efficiency and potentially covering or even blocking the air inlets on the step surface, leading to uneven distribution of combustion air and unstable combustion. Simultaneously, under high-temperature conditions, the mechanism performing the pushing action is prone to damage due to heat conduction, resulting in insufficient reliability. These problems restrict the burnout rate of alternative fuels and the ability of the equipment to operate continuously and stably, necessitating a combustion device that can effectively prevent fuel accumulation, ensure unobstructed air intake, and ensure that key components are resistant to high temperatures. Therefore, a combustion device for alternative fuels in a cement kiln pre-combustion furnace is proposed. Utility Model Content

[0003] To address at least one of the aforementioned technical shortcomings, this utility model provides a substitute fuel combustion device for a cement kiln pre-combustion furnace, comprising: a cement kiln pre-combustion furnace and an air supply system. The edges of the combustion steps of the cement kiln pre-combustion furnace are provided with forward-extending tips, which extend forward to cover the inner side of the lower combustion steps. An air inlet is provided on the inner side of the combustion steps, located directly below the extension tips.

[0004] Furthermore, push plates are provided on the inner side of the combustion steps, and at least two push rods are fixedly connected to the back of the push plates, with electric push rods fixedly connected to the ends of the push rods.

[0005] Furthermore, a heat-insulating sleeve made of heat-insulating material is provided between the output end of the electric actuator and the actuator.

[0006] Furthermore, it also includes a controller for automatic control, which is equipped with a timer. After the electric push rod of the lower combustion step has completed its extension and retraction, the electric push rod of this layer begins to extend 0.5 seconds later.

[0007] Furthermore, an air inlet is provided at the top of the inner surface of the combustion step.

[0008] Furthermore, the air intake is connected to the air supply system via a pipe.

[0009] Furthermore, both ends of the heat insulation sleeve are sleeve structures, which are respectively connected to the output end of the electric push rod and the push rod. Beneficial effects

[0010] The cement kiln pre-combustion furnace is equipped with a gas supply system. The edges of the combustion steps extend forward to form extended tips, which cover the inner area of ​​the next combustion step. Each combustion step has an air inlet on its inner side, positioned directly below the extended tips. This allows primary air to flow directly into the shielded area formed by the extended tips, mixing thoroughly with the falling alternative fuel. This provides a stable and efficient initial combustion environment, improving ignition and combustion efficiency, and effectively preventing fuel from falling onto the air inlets, thus avoiding blockage.

[0011] A pusher plate is installed on the inner side of each combustion step. Two or more push rods are fixedly connected to the back of the pusher plate. The ends of the push rods are fixedly connected to electric push rods, which provide the pushing force. Driven by the electric push rods, the pusher plate reciprocates, periodically and orderly pushing the fuel accumulated on the step forward, effectively pushing the fuel to the lower combustion steps, preventing fuel from accumulating and clogging on the combustion steps below the feed inlet, ensuring that the fuel layer is evenly distributed and gradually moves to the lower layers, thus achieving a continuous and stable combustion process.

[0012] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is an isometric view of the entire utility model.

[0014] Figure 2 This is a cross-sectional view of the entire utility model.

[0015] exist Figures 1 to 2 The correspondence between the component names or lines and the attached drawing numbers is as follows: 1. Cement kiln pre-combustion furnace, 2. Combustion step, 21. Extension tip, 22. Air inlet, 3. Push plate, 4. Push rod, 5. Heat insulation sleeve, 6. Electric push rod. Detailed Implementation

[0016] Combined with appendix Figures 1 to 2 A cement kiln pre-combustion furnace alternative fuel combustion device includes: a cement kiln pre-combustion furnace 1 and an air supply system. The edges of the combustion steps 2 of the cement kiln pre-combustion furnace 1 are provided with extension tips 21 extending forward. The extension tips 21 extend forward to cover the inner part of the lower combustion steps 2. The inner side of the combustion steps 2 is provided with an air inlet 22 located directly below the extension tips 21.

[0017] In practical implementation, the cement kiln pre-combustion furnace 1 is equipped with an air supply system. The edges of the combustion steps 2 extend forward to form extended tips 21, which cover the inner area of ​​the next combustion step 2. Each combustion step 2 has an air inlet 22 on its inner side, which is located directly below the extended tips 21. After the primary air flows out of the air inlet 22, it directly enters the shielded area formed by the extended tips 21, and mixes thoroughly with the falling alternative fuel, providing a stable and efficient initial combustion environment for the fuel, improving ignition and combustion efficiency, and effectively preventing fuel from falling onto the air inlet 22, thus avoiding blockage of the air inlet 22.

[0018] Furthermore, push plates 3 are provided on the inner side of the combustion step 2, and at least two push rods 4 are fixedly connected to the back of the push plate 3. An electric push rod 6 is fixedly connected to the end of the push rod 4.

[0019] In practice, a pusher plate 3 is installed on the inner side of each combustion step 2. Two or more push rods 4 are fixedly connected to the back of the pusher plate 3. The ends of the push rods 4 are fixedly connected to an electric push rod 6, which provides the pushing force. Driven by the electric push rod 6, the pusher plate 3 reciprocates, which can periodically and orderly push the fuel accumulated on the step forward, effectively pushing the fuel to the lower combustion step 2, preventing the fuel from accumulating and clogging on the combustion step 2 below the feed inlet, ensuring that the fuel layer is evenly distributed and gradually moves to the lower layer, thus achieving a continuous and stable combustion process.

[0020] Furthermore, a heat insulation sleeve 5 made of heat insulation material is provided between the output end of the electric push rod 6 and the push rod 4.

[0021] In practical implementation, a heat insulation sleeve 5 is installed between the output end of the electric push rod 6 and the push rod 4. The heat insulation sleeve 5 is made of heat insulation material to prevent heat from being conducted from the push rod 4 to the electric push rod 6. This reduces the impact of high-temperature furnace radiant heat on the electric push rod 6, avoids the push rod from jamming or being damaged due to overheating, greatly extends the service life of the actuator, and ensures the reliability of the unblocking action.

[0022] Furthermore, it also includes a controller for automatic control, which is equipped with a timer. After the electric push rod 6 of the lower combustion step 2 has finished extending and retracting, the electric push rod 6 of this layer begins to extend 0.5 seconds later.

[0023] In practical implementation, the device is equipped with a controller, which has a built-in timer. After the electric pusher 6 of the next combustion step 2 completes its push-out action and retracts to its original position, the electric pusher 6 of the next combustion step 2 begins its push-out action after a delay of 0.5 seconds. This timing control method ensures that the pushing actions of each layer are performed sequentially, avoiding fuel flow disturbances or internal interference that may be caused by the simultaneous action of pushers at different levels. This ensures that the material is rhythmically conveyed from top to bottom in the furnace, making the combustion process more stable and controllable.

[0024] Furthermore, an air inlet 22 is provided on the top of the inner surface of the combustion step 2.

[0025] In practical implementation, an air inlet 22 is opened at the top of the inner surface of the combustion step 2. The air inlet 22 allows gas to enter the combustion zone. By opening the air inlet 22 on the inner side of the top of the step, the combustion-supporting gas generates an airflow, allowing the falling fuel to fully contact the airflow, promoting coke combustion. At the same time, the airflow generates a forward airflow driving force, making the fuel fluffy and easier to burn.

[0026] Furthermore, the air inlet 22 is connected to the air supply system via a pipe.

[0027] In practice, the air inlet 22 is connected to the air supply system via a pipe. The air supply system delivers gas to the air inlet 22 through the pipe.

[0028] Furthermore, both ends of the heat insulation sleeve 5 are sleeve structures, which are respectively connected to the output end of the electric push rod 6 and the push rod 4.

[0029] In practical implementation, the two ends of the heat insulation sleeve 5 are designed as sleeve structures. One end is sleeved onto the output end of the electric push rod 6, and the other end is sleeved onto the push rod 4, achieving a firm connection. The sleeve-type connection structure is not only easy to install and disassemble, and convenient for maintenance and replacement, but also provides a large contact area, ensuring connection strength and being able to withstand the impact and vibration generated during the material pushing process, while maintaining good heat insulation effect.

Claims

1. A fuel replacement combustion device for a cement kiln pre-combustion furnace, comprising: The cement kiln pre-combustion furnace (1) and the gas supply system are characterized in that: the edges of the combustion steps (2) of the cement kiln pre-combustion furnace (1) are all provided with extension tips (21) extending forward, the extension tips (21) extending forward to cover the inner part of the lower combustion steps (2), and the inner side of the combustion steps (2) is provided with an air inlet (22) located directly below the extension tips (21).

2. The alternative fuel combustion device for cement kiln pre-combustion furnace according to claim 1, characterized in that: The inner side of the combustion step (2) is provided with push plate (3), and at least two push rods (4) are fixedly connected to the back of the push plate (3). The end of the push rod (4) is fixedly connected with an electric push rod (6).

3. The alternative fuel combustion device for cement kiln pre-combustion furnace according to claim 2, characterized in that: A heat insulation sleeve (5) made of heat insulation material is provided between the output end of the electric push rod (6) and the push rod (4).

4. The alternative fuel combustion device for cement kiln pre-combustion furnace according to claim 3, characterized in that: It also includes a controller for automatic control, which is equipped with a timer. After the electric push rod (6) of the lower combustion step (2) has finished extending and retracting, the electric push rod (6) of this layer begins to extend after 0.5 seconds.

5. The alternative fuel combustion device for cement kiln pre-combustion furnace according to claim 4, characterized in that: An air inlet (22) is provided on the top of the inner surface of the combustion step (2).

6. The alternative fuel combustion device for cement kiln pre-combustion furnace according to claim 5, characterized in that: The air inlet (22) is connected to the air supply system via a pipe.

7. The alternative fuel combustion device for a cement kiln pre-combustion furnace according to claim 6, characterized in that: Both ends of the heat insulation sleeve (5) are sleeve structures, which are respectively connected to the output end of the electric push rod (6) and the push rod (4).

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