Alternative fuel combustion device for cement kiln pre-combustion furnace

Abstract

The invention provides a cement kiln pre-combustion furnace alternative fuel combustion device, and relates to the technical field of combustion devices.The cement kiln pre-combustion furnace alternative fuel combustion device comprises a combustion bin, a combustion chamber is formed in the combustion bin, the right side of the combustion bin is in a step shape, and each horizontal section of the step part of the combustion bin is provided with a movable combustion box; the movable combustion boxes are used for containing alternative fuels, a rectangular supporting back plate is fixedly installed on the side wall of each movable combustion box, the alternative fuels replace fossil fuels, a direct and effective carbon reduction way is achieved, the influence of the alternative fuels on cement production is known through use of the different types of alternative fuels, and when the alternative fuels are selected, the cement production efficiency is improved. Materials such as material size, harmful elements, inflammability and benefits are emphatically considered, the use proportion of the alternative fuel in cement production is increased to meet the development trend of cement production, the influence of the physicochemical properties of the alternative fuel on cement production, the calorific value utilization efficiency of the alternative fuel is improved, and cost reduction and benefit increase are achieved for cement production to the maximum extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of combustion devices, and more specifically, relates to a cement kiln pre-combustion furnace alternative fuel combustion device. Background Art

[0002] The cement production industry is currently facing many problems that need to be solved urgently. These problems limit the sustainable development of the industry and the improvement of production efficiency and benefits.

[0003] From a fuel usage perspective, traditional cement production is highly dependent on fossil fuels, which not only results in high costs but also places severe pressure on the environment through carbon emissions. With the increasing global emphasis on environmental protection and carbon reduction, the cement industry urgently needs to find effective ways to reduce carbon emissions. While replacing fossil fuels with alternative fuels is recognized as a direct and effective way to reduce carbon emissions, the current proportion of alternative fuels used in cement production remains low. This is primarily due to insufficient research and application of alternative fuels, which fail to fully consider key factors such as material size, harmful elements, flammability, and efficiency. This makes it difficult to rationally select appropriate alternative fuels based on the actual needs of cement production, preventing the full potential of alternative fuels from being fully utilized to achieve the goal of reducing costs and increasing efficiency.

[0004] Existing waste combustion equipment has numerous drawbacks when it comes to waste handling and combustion. For one thing, waste loading isn't convenient or efficient. Traditional equipment often lacks flexibility, making adding waste difficult for operators. This not only consumes significant manpower and time, but can also impact production continuity. Furthermore, equipment maintenance is challenging. The waste combustion process can cause some wear and tear on the equipment, and existing equipment is not designed with maintenance in mind. This makes repair and maintenance complex and costly, impacting both uptime and service life.

[0005] Furthermore, existing combustion equipment has limited waste loading capacity and combustion efficiency, making it unable to fully adapt to the diverse types and quantities of waste it burns. Furthermore, its relatively single combustion method fails to fully utilize the characteristics of different waste materials, resulting in low combustion efficiency. This inability to meet the efficient and stable combustion requirements of cement production, in turn impacting cement production quality and output.

[0006] In summary, the existing cement production waste combustion technology has obvious shortcomings in fuel selection, waste addition and equipment maintenance, waste loading and combustion effect. An innovative solution is urgently needed to increase the proportion of alternative fuels in cement production, optimize the waste combustion process, and achieve cost reduction, efficiency improvement and sustainable development of cement production. Summary of the Invention

[0007] In order to solve the above technical problems, the present invention provides a cement kiln pre-combustion furnace alternative fuel combustion device to solve the above problems.

[0008] A cement kiln pre-combustion furnace alternative fuel combustion device includes a combustion bin, a combustion chamber is provided inside the combustion bin, the right side of the combustion bin is stepped, each horizontal section of the stepped portion of the combustion bin is provided with a movable combustion box, the movable combustion box is used to place alternative fuel, each side wall of the movable combustion box is fixedly installed with a rectangular support back plate, each side wall of the rectangular support back plate is fixedly installed with a first drive motor, each output end of the first drive motor is fixedly installed with a first threaded rod, and each first threaded rod is threadedly connected to the combustion bin.

[0009] Preferably, two feed pipes are fixedly installed on the right side of the top of the combustion bin, a discharger is fixedly installed on the right side of the top of the combustion bin below the feed pipe, at least two brackets are fixedly installed below the discharger, an air intake fan is fixedly installed on the bottom of the left side of the combustion bin, an exhaust pipe is fixedly installed on the output port of the air intake fan, the exhaust pipe passes through the inner wall of the combustion bin, a front support groove is provided on the inner wall of the combustion bin near the bottom, and the front support groove is used to receive the end of the bottom movable combustion box.

[0010] Preferably, a combustion rack is fixedly installed inside the combustion bin, and a front support rack is fixedly installed at the horizontal end of each stepped portion of the combustion bin, and each of the front support racks is used to receive the end of the mobile combustion box, and at least two air inlet slots are equidistantly provided at the bottom of each mobile combustion box, and at least two heating wires are fixedly installed on the inner wall of each mobile combustion box located above the air inlet slot, and the air inlet slot and the heating wire are in a "well" shape, and a groove is provided on the side wall of each mobile combustion box, and a side rotating door is provided in each groove.

[0011] Preferably, a drive shaft is rotatably installed at the bottom of each groove, and the bottom of the side rotating door is sleeved outside the drive shaft, and a second drive motor is fixedly installed at the end of each drive shaft, and the second drive motor is fixedly connected to the side wall of the movable combustion box, and at least two rear support frames are fixedly installed on the outer side wall of the stepped portion of the combustion chamber, and each of the rear support frames is used to support a rectangular support backplate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the waste materials to be burned are placed in a mobile combustion box, and then the heating wire heats the waste materials to ignite them, and at the same time, the air inlet fan injects air into the combustion chamber to improve the overall combustion efficiency. Since a plurality of mobile combustion boxes are provided on the stepped portion of the combustion chamber, different types of combustion waste materials can be placed in each mobile combustion box, thereby achieving different combustion efficiencies. Cement is burned in the combustion rack, and waste cloth, waste clothes, straw, waste plastic particles, biomass particles, biomass powder and other waste materials on the market are used as raw materials. 40% of alternative fuels are used in cement production, and for every 100,000 tons of clinker produced in the combustion chamber, about 1% of the combustion chamber will be reduced in emissions. 10,000 tons of carbon dioxide. At present, the cement industry has the greatest potential for carbon reduction by saving the use of fossil fuels. Replacing fossil fuels with alternative fuels is a direct and effective way to reduce carbon. By using different types of alternative fuels, we can understand their impact on cement production. When selecting alternative fuels, we should focus on factors such as material size, harmful elements, flammability, and efficiency. Increasing the proportion of alternative fuels in cement production is in line with the development trend of cement production. The impact of the physical and chemical properties of alternative fuels on cement production, as well as improving the utilization efficiency of the calorific value of alternative fuels, can maximize the cost reduction and efficiency improvement of cement production.

[0013] In the present invention, the two first drive motors on the side walls of the rectangular support backplate are started, and the two first drive motors are started to drive the first threaded rods to rotate, and the rotation of the two first threaded rods drives the mobile combustion box to move outward from the combustion chamber, and when the back side of the rectangular support backplate moves to the rear support frame and the bottom of the rectangular support backplate is supported by the bottom of the rear support frame, it stops. At this time, the rear support frame can limit the rectangular support backplate and support the rectangular support backplate at the same time. By designing the mobile combustion box to be movable, waste can be added conveniently, and the subsequent maintenance capability of the mobile combustion box is greatly improved. The rear support frame performs secondary protection, which can improve the stability of the mobile combustion box during movement.

[0014] In the present invention, the second drive motor on the side wall of the mobile combustion box is started, and the second drive motor is started to drive the drive shaft to rotate, and the rotation of the drive shaft drives the side rotating door to rotate outward, and the side rotating door rotates outward in the groove, and then the mobile combustion box is fully unfolded. At this time, the user can conveniently add waste into the mobile combustion box. The side rotating door on the side of the mobile combustion box is designed to be rotatable, so that different types of conveying mechanisms can be used to facilitate the conveying of waste, further improving the convenience of waste conveying.

[0015] In the present invention, when the mobile combustion box moves inside the combustion chamber, the mobile combustion box located at the bottom of the combustion chamber will insert its end into the front support groove, and the other mobile combustion boxes will insert their ends into the front support frame when moving. At this time, the mobile combustion box receives more support in the combustion chamber, and the mobile combustion box can support more waste during combustion, thereby improving the carrying capacity of the waste.

[0016] In the present invention, one side of the combustion chamber is designed to be stepped, so that combustion at different heights can be achieved. The combustion box can be moved at different heights to select different types of combustion waste, thereby making full use of the characteristics of different wastes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the combustion chamber structure of the present invention; Figure 2 It is a structural schematic diagram of the combustion rack of the present invention; Figure 3 It is a schematic structural diagram of the rear support frame of the present invention; Figure 4 This is a schematic diagram of the rectangular support back plate structure of the present invention; Figure 5 It is a structural schematic diagram of the mobile combustion box of the present invention; Figure 6 This invention Figure 3 A in the figure is an enlarged structural diagram.

[0018] In the figure, the correspondence between the component names and the drawing numbers is: 1. Combustion chamber; 11. Discharge machine; 12. Bracket; 13. Feed pipe; 14. Air inlet fan; 15. Combustion frame; 16. Front support frame; 17. Rear support frame; 18. Front support groove; 19. Exhaust duct; 2. Rectangular support back plate; 22. First drive motor; 23. First threaded rod; 24. Movable combustion box; 25. Air inlet groove; 26. Heating wire; 27. Second drive motor; 28. Drive shaft; 29. ​​Side rotating door; 3. Combustion chamber; 31. Groove. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0020] See also Figures 1-6The present invention provides a cement kiln pre-combustion furnace alternative fuel combustion device, including a combustion chamber 1, a combustion chamber 3 is opened inside the combustion chamber 1, the right side of the combustion chamber 1 is stepped, and the air inlet fan 14 is poured into the combustion chamber 1 to improve the overall combustion efficiency. Since the stepped portion of the combustion chamber 1 is provided with a plurality of movable combustion boxes 24, different types of combustion waste can be placed in each movable combustion box 24, thereby achieving different combustion efficiencies. Cement is burned in the combustion rack 15, and waste cloth, waste clothes, straw, and waste plastics on the market are used. Waste such as particles, biomass particles, and biomass powder are used as raw materials, and 40% of alternative fuels are used in cement production. Each horizontal section of the stepped portion of the combustion bin 1 is provided with a mobile combustion box 24, and the mobile combustion box 24 is used to place alternative fuels. The side walls of each mobile combustion box 24 are fixedly installed with a rectangular support backboard 2, and each side wall of the rectangular support backboard 2 is fixedly installed with a first drive motor 22. The output end of each first drive motor 22 is fixedly installed with a first threaded rod 23, and each first threaded rod 23 is threadedly connected to the combustion bin 1.

[0021] Two feeding pipes 13 are fixedly installed on the right side of the top of the combustion bin 1, and a discharging machine 11 is fixedly installed on the right side of the top of the combustion bin 1 below the feeding pipe 13. At least two brackets 12 are fixedly installed below the discharging machine 11, and an air inlet fan 14 is fixedly installed on the bottom of the left side of the combustion bin 1. The two first drive motors 22 are started to drive the first threaded rod 23 to rotate, and the two first threaded rods 23 rotate to drive the mobile combustion box 24 to move out of the combustion bin 1. When the back side of the rectangular support backboard 2 moves to the rear support frame 17 and the bottom of the rectangular support backboard 2 is supported by the bottom of the rear support frame 17, it stops. At this time, the rear support frame 17 can limit the rectangular support backboard 2 and support the rectangular support backboard 2 at the same time. The output port of the air inlet fan 14 is fixedly installed with an exhaust pipe 19, which passes through the inner wall of the combustion bin 1, and a front support groove 18 is provided on the inner wall of the combustion bin 1 near the bottom. The front support groove 18 is used to support the end of the bottom mobile combustion box 24.

[0022] A combustion frame 15 is fixedly installed inside the combustion chamber 1, and a front support frame 16 is fixedly installed at the horizontal end of each stepped portion of the combustion chamber 1. Each front support frame 16 is used to receive the end of the mobile combustion box 24. At least two air inlet slots 25 are equidistantly provided at the bottom of each mobile combustion box 24. The mobile combustion box 24 located at the bottom of the combustion chamber 1 will insert its end into the front support slot 18, and the other mobile combustion boxes 24 will insert their ends into the front support frame 16 when moving. At this time, the mobile combustion box 24 is more supported in the combustion chamber 1, and the mobile combustion box 24 can support more waste during combustion. The inner wall of each mobile combustion box 24 located above the air inlet slot 25 is fixedly installed with at least two heating wires 26, and the air inlet slot 25 and the heating wire 26 are in a "well" shape. The side walls of each mobile combustion box 24 are provided with grooves 31, and each groove 31 is provided with a side rotating door 29.

[0023] The bottom of each groove 31 is rotatably installed with a drive shaft 28. The second drive motor 27 is started to drive the drive shaft 28 to rotate. The rotation of the drive shaft 28 drives the side rotating door 29 to rotate outward. The side rotating door 29 rotates outward in the groove 31, and then the mobile combustion box 24 is fully unfolded. At this time, the user can easily add waste to the mobile combustion box 24. The side rotating door 29 on the side of the mobile combustion box 24 is designed to be rotatable, so that different types of conveying mechanisms can be convenient for conveying waste, and the bottom of the side rotating door 29 is sleeved on the outside of the drive shaft 28. The end of each drive shaft 28 is fixedly installed with a second drive motor 27, and the second drive motor 27 is fixedly connected to the side wall of the mobile combustion box 24. The outer wall of the stepped portion of the combustion chamber 1 is fixedly installed with at least two rear support frames 17, and each rear support frame 17 is used to support the rectangular support backboard 2.

[0024] Working principle: In the first step, the feed pipe 13 is used for feeding and discharging materials, and the discharger 11 is used for conveying the main materials. The waste materials to be burned are placed in the mobile combustion box 24, and then the heating wire 26 heats the waste materials to ignite them. At the same time, the air inlet fan 14 injects air into the combustion chamber 1 to improve the overall combustion efficiency. Since the stepped portion of the combustion chamber 1 is provided with a plurality of mobile combustion boxes 24, different types of combustion waste materials can be placed in each mobile combustion box 24, so that different combustion efficiencies can be achieved. Cement is burned in the combustion rack 15, and waste cloth, waste clothes, straw, waste plastic particles, biomass particles, biomass powder and other waste materials on the market are used as raw materials. 40% of alternative fuels are used in cement production. For every 100,000 tons of clinker produced in the combustion chamber, about 10% less emissions will be emitted from the combustion chamber. 10,000 tons of carbon dioxide. At present, the cement industry has the greatest potential for carbon reduction by saving the use of fossil fuels. Replacing fossil fuels with alternative fuels is a direct and effective way to reduce carbon. By using different types of alternative fuels, we can understand their impact on cement production. When selecting alternative fuels, we should focus on factors such as material size, harmful elements, flammability, and efficiency. Increasing the proportion of alternative fuels in cement production is in line with the development trend of cement production. The impact of the physical and chemical properties of alternative fuels on cement production, as well as improving the utilization efficiency of the calorific value of alternative fuels, can maximize the cost reduction and efficiency improvement of cement production.

[0025] In the second step, when it is necessary to put waste into the mobile combustion box 24, the two first drive motors 22 of the side walls of the rectangular support backboard 2 are started, and the two first drive motors 22 are started to drive the first threaded rods 23 to rotate. The two first threaded rods 23 rotate to drive the mobile combustion box 24 to move outward from the combustion chamber 1, and when the back side of the rectangular support backboard 2 moves to the rear support frame 17 and the bottom of the rectangular support backboard 2 is undertaken by the bottom of the rear support frame 17, it stops. At this time, the rear support frame 17 can limit the rectangular support backboard 2 and support the rectangular support backboard 2 at the same time. By designing the mobile combustion box 24 to be movable, it is convenient to add waste, and at the same time greatly improves the subsequent maintenance capability of the mobile combustion box 24, and the rear support frame 17 performs secondary protection, which can improve the stability of the mobile combustion box 24 when moving; After the mobile combustion box 24 moves out, the second drive motor 27 on the side wall of the mobile combustion box 24 is started, and the second drive motor 27 starts to drive the drive shaft 28 to rotate. The rotation of the drive shaft 28 drives the side rotating door 29 to rotate outward, and the side rotating door 29 rotates outward in the groove 31. Then the mobile combustion box 24 is fully unfolded. At this time, the user can conveniently add waste into the mobile combustion box 24. The side rotating door 29 on the side of the mobile combustion box 24 is designed to be rotatable, so that different types of conveying mechanisms can be conveniently used to convey the waste, further improving the convenience of waste transportation.

[0026] In the third step, when the mobile combustion box 24 moves inside the combustion chamber 1, the mobile combustion box 24 located at the bottom of the combustion chamber 1 will insert its end into the front support groove 18, and the other mobile combustion boxes 24 will insert their ends into the front support frame 16 when moving. At this time, the mobile combustion box 24 is more supported in the combustion chamber 1, and the mobile combustion box 24 can support more waste during combustion, thereby improving the carrying capacity of the waste; One side of the combustion chamber 1 is designed to be stepped, so that combustion at different heights can be achieved. The combustion box 24 can be moved at different heights to select different types of combustion waste, so that the characteristics of different wastes can be fully utilized.

[0027] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A cement kiln pre-combustion furnace alternative fuel combustion device, comprising a combustion chamber (1), characterized in that: A combustion chamber (3) is provided inside the combustion bin (1), and the right side of the combustion bin (1) is stepped. Each horizontal section of the stepped portion of the combustion bin (1) is provided with a movable combustion box (24), and the movable combustion box (24) is used to place alternative fuel. A rectangular support back plate (2) is fixedly mounted on the side wall of each movable combustion box (24), and a first drive motor (22) is fixedly mounted on the side wall of each rectangular support back plate (2). A first threaded rod (23) is fixedly mounted on the output end of each first drive motor (22), and each first threaded rod (23) is threadedly connected to the combustion bin (1).

2. A cement kiln pre-combustion furnace alternative fuel combustion device as claimed in claim 1, characterized in that: Two feeding pipes (13) are fixedly installed on the right side of the top of the combustion bin (1), a discharger (11) is fixedly installed on the right side of the top of the combustion bin (1) below the feeding pipes (13), and at least two brackets (12) are fixedly installed below the discharger (11).

3. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: An air inlet fan (14) is fixedly mounted on the bottom of the left side of the combustion chamber (1), and an exhaust pipe (19) is fixedly mounted on the output port of the air inlet fan (14), and the exhaust pipe (19) passes through the inner wall of the combustion chamber (1).

4. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: A front support groove (18) is provided on the inner wall of the combustion chamber (1) close to the bottom, and the front support groove (18) is used to receive the end of the movable combustion box (24) at the bottom.

5. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: A combustion frame (15) is fixedly installed inside the combustion chamber (1), and a front support frame (16) is fixedly installed at the horizontal end of each stepped portion of the combustion chamber (1), and each front support frame (16) is used to receive the end of a movable combustion box (24).

6. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: At least two air inlet slots (25) are equidistantly provided at the bottom of each of the mobile combustion boxes (24), and at least two heating wires (26) are fixedly mounted on the inner wall of each of the mobile combustion boxes (24) above the air inlet slots (25), and the air inlet slots (25) and the heating wires (26) are arranged in a "well" shape.

7. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: A groove (31) is provided on the side wall of each movable combustion box (24), and a side rotating door (29) is provided in each groove (31).

8. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 7, characterized in that: A driving shaft (28) is rotatably mounted on the bottom of each groove (31), and the bottom of the side rotating door (29) is sleeved outside the driving shaft (28).

9. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 8, characterized in that: A second drive motor (27) is fixedly mounted on the end of each drive shaft (28), and the second drive motor (27) is fixedly connected to the side wall of the movable combustion box (24).

10. The cement kiln pre-combustion furnace alternative fuel combustion device according to claim 1, characterized in that: At least two rear support frames (17) are fixedly mounted on the outer side wall of the stepped portion of the combustion chamber (1), and each rear support frame (17) is used to receive a rectangular support back plate (2).

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