Alternative fuel combustion furnace

Abstract

The invention discloses an alternative fuel combustion furnace. The device comprises a supporting base, the upper end of the supporting base is in an inverted L shape, an upper shell is arranged on the upper side of the supporting base, a preheating platform and a combustion platform are arranged on the upper side of the supporting base in the upper shell, the combustion platform is arranged on the inclined section of the inverted L shape, and the preheating platform is arranged on the horizontal section, adjacent to the combustion platform, of the inverted L shape. An alternative fuel inlet and a hot air inlet are formed in the upper side of the upper shell, the alternative fuel inlet is used for feeding alternative fuel to the preheating platform, the hot air inlet is used for introducing air for combusting the alternative fuel, and a pushing mechanism is arranged at the end, away from the combustion platform, of the preheating platform; the material pushing mechanism is used for pushing alternative fuel on the preheating platform to the combustion platform, and a material turning mechanism is arranged on the lower side of the combustion platform. According to the device, the use requirements of alternative materials with different water contents and ignition points are met, the material turning effect is achieved in the process that alternative fuel combusts and moves backwards, and interference of coking and caking in the combustion process on subsequent links is avoided.

Description

Technical Field

[0001] This invention relates to the field of alternative fuel combustion furnace technology, and specifically to an alternative fuel combustion furnace. Background Technology

[0002] Since 2020, coal prices have risen significantly, putting cement plants under immense pressure from increased fuel costs. The benchmark for comprehensive coal consumption per unit of clinker in the cement industry is ≤94 kgce / t, while inefficient coal consumption is ≤109 kgce / t. This has led to an increased demand for alternative fuels from cement plants.

[0003] Currently, most domestic alternative fuels are processed and directly fed into the decomposition furnace, resulting in incomplete combustion during actual operation, affecting clinker yield and quality. Furthermore, the requirements for alternative fuels are very high, limiting the types of alternative fuels that can be used. Overseas alternative fuel combustion furnaces have complex structures, high investment costs, and high operating and maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide an alternative fuel combustion furnace to address the shortcomings of existing technologies.

[0005] To achieve the above objectives, the present invention provides an alternative fuel combustion furnace, including a support base. The upper end of the support base is in the shape of a "F". An upper shell is provided on the upper side of the support base. A preheating platform and a combustion platform are provided on the upper side of the support base inside the upper shell. The combustion platform is located on the inclined section of the "F" shape, and the preheating platform is located on the horizontal section of the "F" shape adjacent to the combustion platform. An alternative fuel inlet and a hot air inlet are provided on the upper side of the upper shell. The alternative fuel inlet is used to feed alternative fuel onto the preheating platform, and the hot air inlet is used to introduce air for combustion of the alternative fuel. A pushing mechanism is provided at the end of the preheating platform away from the combustion platform to push the alternative fuel on the preheating platform onto the combustion platform. A turning mechanism is provided on the lower side of the combustion platform.

[0006] Furthermore, the pushing mechanism includes a connecting frame fixed on the upper side of the support base, a first driving member disposed on the connecting frame, and a pushing member connected to the first driving member. The upper housing has an opening at a position corresponding to the pushing member, and the pushing member passes through the opening to extend into the upper side of the preheating platform.

[0007] Furthermore, the connecting frame is provided with multiple support rollers, and the lower side of the pushing component is rotatably connected to the upper side of the support rollers.

[0008] Furthermore, a guide frame is fixed on the connecting frame, a plurality of guide wheels are fixed on the guide frame, and a wheel rail that cooperates with the guide wheels is fixed on the pushing component.

[0009] Further, a sealing cover is fixed inside the opening, and the pushing component is slidably connected inside the sealing cover.

[0010] Further, the material turning mechanism includes a plurality of fixed crossbeams arranged at intervals and movable crossbeams arranged staggeredly with the fixed crossbeams. The fixed crossbeams and the movable crossbeams are arranged along the inclined section of the factory character shape. The two ends of the fixed crossbeams are fixed inside the upper housing. There are intervals between the two ends of the movable crossbeams and the upper housing and between adjacent fixed crossbeams and movable crossbeams. And a supporting wheel track beam is fixedly connected to its lower end. The supporting wheel track beam is movably connected to the supporting base, and a second driving component is connected between it and the supporting base. The combustion platform includes supporting plates respectively fixed on the upper sides of the fixed crossbeams and the movable crossbeams, and the supporting plates on the adjacent fixed crossbeams and movable crossbeams are slidably connected.

[0011] Further, the supporting plates are in a stepped shape, and there are multiple supporting plates on each fixed crossbeam and movable crossbeam, which are arranged in sequence.

[0012] Further, side guard plates are respectively fixed at both ends of the plurality of fixed crossbeams. The side guard plates are arranged at intervals on both sides of the movable crossbeam and the supporting plate on its upper side.

[0013] Further, a plurality of grate holes are opened on the supporting plates. A lower housing is arranged outside the supporting base, and an aggregate cone is fixedly connected to its lower end. A flap valve is arranged at the lower end of the aggregate cone. The lower housing and the aggregate cone cooperate to enclose and seal the supporting base on the lower sides of the preheating platform and the combustion platform. Air holes are arranged on the lower housing, and a blower is connected to the outside of the air holes.

[0014] Further, a supporting wheel bracket is fixed on the supporting base. A plurality of supporting wheels are arranged on the supporting wheel bracket. The lower end of the movable crossbeam is fixedly connected to the supporting wheel track beam. A supporting wheel track is fixedly arranged at the corresponding position of the supporting wheel at the lower end of the supporting wheel track beam, and the supporting wheel track is in rolling connection with the supporting wheel.

[0015] Advantageous effects: By arranging a preheating platform below the alternative fuel inlet, the present invention can perform drying and preheating treatment on the input alternative materials, meet the usage requirements of alternative materials with different water contents and ignition points, and use the pushing mechanism to push the alternative fuel on the preheating platform into the combustion platform. The pushing frequency can be adjusted according to the drying and preheating conditions of the alternative fuel; by arranging the combustion platform on an inclined plane and arranging supporting plates on the fixed crossbeams and the movable crossbeams, the movable crossbeam and the supporting plate on its upper side are controlled to reciprocate through the material turning mechanism, so as to achieve the material turning effect during the combustion and backward movement of the alternative fuel, and avoid the interference of coking and agglomeration during combustion on subsequent processes. Description of the Drawings

[0016] Figure 1It is a schematic structural view of an alternative fuel combustion furnace according to an embodiment of the present invention; Figure 2 is Figure 1 a partial enlarged structural view of area A in Figure 3 It is a schematic view of the pushing mechanism according to an embodiment of the present invention; Figure 4 It is a schematic view of the material turning mechanism according to an embodiment of the present invention. Specific embodiments

[0017] The present invention will be further clarified below in conjunction with the accompanying drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0018] As Figures 1 to 4 shown, an embodiment of the present invention provides an alternative fuel combustion furnace, including a support base 1. The upper end of the support base 1 is in a factory shape, including an inclined section and a horizontal section. An upper housing 2 is provided on the upper side of the support base 1. A preheating platform 3 and a combustion platform 4 are provided on the upper side of the support base 1 inside the upper housing 2. Among them, the combustion platform 4 is arranged on the inclined section of the factory shape, and the preheating platform 3 is arranged on the horizontal section of the factory shape adjacent to the combustion platform 4. The preheating platform 3 only occupies a part of the horizontal section, and the length of the preheating platform 3 is generally set to be more than 1500 mm. An alternative fuel inlet 5 and a hot air inlet 6 are provided on the upper side of the upper housing 2. The alternative fuel inlet 5 is used to input alternative fuel onto the preheating platform 3. After the alternative fuel is on the preheating platform 3, it can be dried and preheated to increase the temperature of the alternative fuel and dry the moisture therein. The hot air inlet 6 is used to introduce air for burning the alternative fuel, which can be the excess hot air from the combustion of a rotary kiln, and the temperature can reach above 500 °C, which is sufficient to make the preheated alternative fuel reach the ignition point and will automatically ignite the alternative fuel when contacting with the alternative fuel. A pushing mechanism 7 is provided at one end of the preheating platform 3 far from the combustion platform 4. The pushing mechanism 7 is used to push the alternative fuel on the preheating platform 3 onto the combustion platform 4. A material turning mechanism 8 is provided on the lower side of the combustion platform 4. The material turning mechanism 8 can achieve the turning effect of the alternative fuel in the combustion platform 4 to avoid coking and agglomeration. The rear side of the upper housing 2 is used to connect with the decomposition furnace of the preheater. The alternative fuel only burns partially in the combustion platform 4, generally about 70%, and then is sent into the decomposition furnace to continue burning together with coal, providing heat for the decomposition furnace and reducing the coal consumption.

[0019] The feeding mechanism 7 of this embodiment includes a connecting frame 71 fixed on the upper side of the support base 1, a first driving component 72, and a pushing component 73. The first driving component 72 is preferably a hydraulic cylinder, which is mounted on the connecting frame 71. The pushing component 73 is connected to the hydraulic cylinder. Specifically, hinge seats 74 can be respectively provided at the ends of the connecting frame 71 and the pushing component 73 away from the preheating platform 3. Then, the two ends of the hydraulic cylinder are respectively hinged to the two hinge seats 74 via pins. An opening is provided at the position corresponding to the pushing component 73 in the upper housing 2. The pushing component 73 is inserted into the opening, that is, it extends through the opening to the upper side of the preheating platform 3. When alternative fuel is added through the alternative fuel inlet 5, the height of the alternative fuel accumulation should be greater than the connection position between the alternative fuel inlet 5 and the upper housing 2 to seal the position and prevent air leakage. After a certain accumulation amount is reached, the hydraulic cylinder is extended, allowing the pushing component 3 to push part of the alternative fuel into the combustion platform 4. Then, the pushing component is retracted, causing the alternative fuel to fall onto the preheating platform 3. This process is repeated, and the pushing frequency can be adjusted according to the drying and preheating conditions. In addition, the aforementioned alternative fuel inlets 5 are preferably two spaced apart, corresponding to two hydraulic cylinders and two push components 73.

[0020] To ensure stable movement of the pushing component 73, it is preferable to provide multiple support rollers 75 on the connecting frame 71, with the lower side of the pushing component 73 rotatably connected to the upper side of the support rollers 75. Preferably, the pushing component 73 is box-shaped to facilitate the pushing of a certain thickness of alternative fuel. It is also preferable to fix a guide frame 76 on the connecting frame 71, and to fix a plurality of guide wheels 77 on the guide frame 76. A wheel rail 78 that mates with the guide wheels 77 is fixed on the pushing component 73, thereby defining the direction of movement of the pushing component 73 through the interaction of the guide wheels 77 and the wheel rail 78. To improve the sealing between the pushing component 73 and the opening, a sealing cover 79 is fixed inside the opening, and the pushing component 73 is slidably connected to the inside of the sealing cover 79.

[0021] The stock turning mechanism 8 includes a plurality of fixed crossbeams 81 and a plurality of movable crossbeams 82. The plurality of fixed crossbeams 81 and the plurality of movable crossbeams 82 are both arranged at intervals, and the fixed crossbeams 81 and the movable crossbeams 82 are arranged in a staggered manner. The fixed crossbeams 81 and the movable crossbeams 82 are arranged along the inclined section of the factory character shape, that is, there is a certain height difference between adjacent fixed crossbeams 81 and movable crossbeams 82 in the vertical direction. Both ends of the above-mentioned fixed crossbeams 81 are fixed to the inner side of the upper housing 2. There are intervals between both ends of the movable crossbeams 82 and the upper housing 2, and between adjacent fixed crossbeams 81 and movable crossbeams 82, meeting the space required for the movement of the movable crossbeams 82 within a certain range. A supporting wheel track beam 83 is fixedly connected to the lower end of the movable crossbeam 82. The supporting wheel track beam 83 is movably connected to the support base 1. A second driving member 84 is connected between the supporting wheel track beam 83 and the support base 1. The second driving member 84 is also preferably a hydraulic cylinder. The combustion platform 4 includes a support plate 85 respectively fixed to the upper sides of the fixed crossbeams 81 and the movable crossbeams 82. The support plates 85 on the upper sides of adjacent fixed crossbeams 81 and movable crossbeams 82 are slidably connected. When controlling the telescopic movement of the second driving member 84, the plurality of movable crossbeams 82 will reciprocally move together with the supporting wheel track beam 83. Furthermore, the support plate 85 on the movable crossbeam 82 will relatively move with respect to the support plate on the fixed crossbeam 81, thereby pushing the substitute material forward and downward and achieving the effect of turning the substitute material.

[0022] To ensure the turning effect of the substitute material, it is preferred to set the above-mentioned support plate 85 in a stepped shape. Since the widths of the fixed crossbeams 81 and the movable crossbeams 82 are relatively large, for the convenience of manufacturing and maintenance, it is preferred to set a plurality of support plates 85 on each of the fixed crossbeams 81 and the movable crossbeams 82. The plurality of support plates 85 are arranged in sequence to form a whole. To prevent the substitute material from falling and accumulating on both sides of the support plate 85, causing wear inside the upper housing 2, it is preferred to fixedly install a side guard plate 86 at both ends of the plurality of fixed crossbeams 81 respectively. The inner side of the side guard plate 86 is closely attached to the support plate 85 on the fixed crossbeam 81, and there are gaps between the side guard plate 86 and both ends of the movable crossbeam 82 and its upper support plate 85, which will not affect the reciprocal movement of the movable crossbeam 82 and its upper support plate 85. There is a certain interval between the outer side of the side guard plate 86 and the upper housing 2.

[0023] Preferably, multiple grate holes are provided on the support plate 85, and a lower housing 9 is provided on the outside of the support base 1. A material collecting cone 10 is fixed at the lower end of the support base 1, and a flap valve is provided at the lower end of the material collecting cone 10. The lower housing 9 and the material collecting cone 10 cooperate to surround and seal the support base 1 on the lower side of the preheating platform 3 and the combustion platform 4. An air hole 11 is provided on the lower housing 9, and a fan is connected to the outside of the air hole 11. Preferably, there are two air holes 11, which are respectively arranged opposite to each other on both sides of the lower housing 9. The flap valve is generally kept in the closed state. The air introduced by the fan will move upward through the grate holes and the gap between the upper support plate 85 and the side guard plate 86 of the movable crossbeam 82, which greatly reduces the possibility of the substitute material leaking to the lower side of the combustion platform 4. A small amount of substitute material that leaks to the lower side of the combustion platform 4 falls into the material collecting cone 10 for collection. When a certain weight is collected, the flap valve is opened, and the leaked substitute material is discharged.

[0024] To facilitate the movable connection of the roller track beam 83 to the support base 1, a roller bracket 87 can be fixed on the support base 1. Multiple rollers 88 are provided on the roller bracket 87, and the rollers 88 can rotate freely on the roller bracket. A roller track 89 is fixed at the lower end of the roller track beam 83 at a position corresponding to the rollers 88. The roller track 89 is located on the upper side of the rollers 88 and is tactilely connected to the rollers 88.

[0025] In addition, an insulating lining can be built on the inner side of the upper shell 2 to protect the upper shell 2 and reduce heat loss. Heat-resistant linings are installed on the outside of the fixed crossbeam 81, the movable crossbeam 82, and the side guard plate 86 for protection.

[0026] The above description is merely a preferred embodiment of the present invention. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An alternative fuel combustion furnace, characterized in that, The device includes a support base, the upper end of which is in the shape of a "F". An upper housing is located on the upper side of the support base. A preheating platform and a combustion platform are located on the upper side of the support base within the upper housing. The combustion platform is positioned on the inclined section of the "F" shape, and the preheating platform is positioned on the horizontal section of the "F" shape adjacent to the combustion platform. An alternative fuel inlet and a hot air inlet are located on the upper side of the upper housing. The alternative fuel inlet is used to feed alternative fuel onto the preheating platform, and the hot air inlet is used to introduce air for combustion of the alternative fuel. A pushing mechanism is located at the end of the preheating platform away from the combustion platform, used to push the alternative fuel from the preheating platform onto the combustion platform. A tipping mechanism is located on the lower side of the combustion platform.

2. The alternative fuel combustion furnace according to claim 1, characterized in that, The pushing mechanism includes a connecting frame fixed on the upper side of the support base, a first driving component disposed on the connecting frame, and a pushing component connected to the first driving component. The upper housing has an opening at a position corresponding to the pushing component, and the pushing component passes through the opening to extend into the upper side of the preheating platform.

3. The alternative fuel combustion furnace according to claim 2, characterized in that, The connecting frame is provided with multiple support rollers, and the lower side of the pushing component is rotatably connected to the upper side of the support rollers.

4. The alternative fuel combustion furnace according to claim 3, characterized in that, A guide frame is also fixed on the connecting frame, and a number of guide wheels are fixed on the guide frame. A wheel rail that cooperates with the guide wheels is fixed on the pushing component.

5. The alternative fuel combustion furnace according to claim 2, characterized in that, A sealing cover is fixed to the inside of the opening, and the pushing component is slidably connected to the inside of the sealing cover.

6. The alternative fuel combustion furnace according to claim 1, characterized in that, The material turning mechanism includes multiple fixed crossbeams spaced apart and movable crossbeams intersecting the fixed crossbeams. The fixed crossbeams and movable crossbeams are arranged along the inclined section of the "F" shape. The two ends of the fixed crossbeams are fixed to the inner side of the upper shell. The two ends of the movable crossbeams are spaced apart from the upper shell and from adjacent fixed crossbeams and movable crossbeams. The lower end of the movable crossbeams is fixedly connected to a roller track beam. The roller track beam is movably connected to a support base, and a second driving component is connected between the roller track beam and the support base. The combustion platform includes support plates on the upper sides of the fixed crossbeams and movable crossbeams respectively. The support plates on the upper sides of adjacent fixed crossbeams and movable crossbeams are slidably connected.

7. The alternative fuel combustion furnace according to claim 6, characterized in that, The support plate is stepped, and there are multiple support plates on each fixed beam and movable beam, arranged in sequence.

8. The alternative fuel combustion furnace according to claim 7, characterized in that, Each end of a plurality of fixed crossbeams is fixed with a side guard plate, and the side guard plates are spaced apart on both sides of the movable crossbeams and the support plates above them.

9. The alternative fuel combustion furnace according to claim 6, characterized in that, The support plate has multiple grate holes. The outer side of the support base has a lower shell, and a material collecting cone is fixed at its lower end. The lower end of the material collecting cone is equipped with a flap valve. The lower shell and the material collecting cone cooperate to surround and seal the support base on the lower side of the preheating platform and the combustion platform. The lower shell has air holes, and a fan is connected to the outer side of the air holes.

10. A substitute fuel combustion furnace according to claim 6, characterized in that, A roller support bracket is fixed on the support base, and multiple rollers are provided on the roller support bracket. The lower end of the movable crossbeam is fixedly connected to the roller track beam, and a roller track is fixed at the lower end of the roller track beam at the corresponding position of the roller. The roller track is tactilely connected to the roller.

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