A waste heat recovery system for a rotary kiln used in barite roasting

Abstract

The present invention relates to the technical field of waste heat recovery, and discloses a waste heat recovery system for a rotary kiln used in barite roasting, including: a bottom plate, on which a vertical frame is fixedly installed, and a fixing frame is arranged thereon. An elevating frame is slidably installed on the fixing frame. After the folding plate is folded in the present invention, the raw materials fall into the folding area. At this time, the moving plate pushes the roasted raw materials close to the folding plate. The triangular shape formed by the folding of the folding plate squeezes and guides the roasted raw materials piled on the moving plate into the folding area below the folding plate. At this time, only the folding plate separates the roasted raw materials from the raw materials. The high temperature carried by the roasted raw materials can directly preheat the raw materials at a high temperature. After a period of heat exchange, the raw materials on the folding plate and the roasted raw materials on the moving plate are redistributed to fully release the heat in the piled roasted raw materials to preheat the raw materials at a high temperature, avoiding the problem of large heat loss caused by using an intermediate heat transfer medium to transfer heat.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and particularly relates to a waste heat recovery system for a rotary kiln used in barite roasting. Background Art

[0002] In the industrial processing of barite, the rotary kiln has become one of the core devices in the roasting process due to its unique advantages. It is mainly used to achieve purposes such as desulfurization, purification, and crystal reconstruction of minerals. During the operation of the rotary kiln, there are multiple waste heat resources that can be recycled, and the main waste heat sources include high-temperature flue gas generated by fuel combustion, infrared radiation heat radiated outward from the outer wall of the rotary kiln under high-temperature operating conditions, and high-temperature heat carried by the discharged raw materials.

[0003] In the existing waste heat recovery process, when dealing with the high-temperature heat carried by the discharged roasting raw materials, the common practice is to combine these high-temperature roasting raw materials with a heat exchanger. During this process, the high-temperature heat carried by the raw materials is transferred to water, causing the water to evaporate and form water vapor. Subsequently, this water vapor is used to heat other objects that need to be heated, thereby achieving the recovery and reuse of waste heat. However, this heat transfer method using water vapor as an intermediate medium will cause a large amount of heat to be dissipated during the conversion process. More importantly, the heat carried by the roasting raw materials themselves is very high, and simply using it to heat steam is actually a waste of energy. Based on this, the present invention purposefully provides a waste heat recovery system for a rotary kiln used in barite roasting that can make full use of the high-temperature heat carried by the roasting raw materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a waste heat recovery system for a rotary kiln used in barite roasting to solve the technical problems in the existing technology in view of the deficiencies of the existing technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A waste heat recovery system for a rotary kiln used in barite roasting, comprising:

[0007] A bottom plate, on which a vertical frame is fixedly installed, and a fixing frame is provided thereon. An elevating frame is slidably installed on the fixing frame, and the elevating frame is driven by a first driving source to move up and down;

[0008] The load-carrying frame is placed on the lifting frame, and a moving plate is slidably installed therein. The moving plate is used to carry the calcined raw materials discharged from the rotary kiln. The load-carrying frame is connected to a supporting plate through a second spring, and an eccentric wheel is rotatably installed therein. The eccentric wheel is driven by a linkage assembly to rotate. A first cylinder is fixedly installed in the load-carrying frame. When the first cylinder contracts, the moving plate descends and abuts against the second spring and the eccentric wheel. At this time, the rotation of the eccentric wheel will drive the moving plate to vibrate. When the first cylinder extends, its movable end pushes the moving plate to rise; and

[0009] The preheating frame is arranged on the vertical frame and is located above the load-carrying frame. A folding plate for carrying raw materials is arranged in the preheating frame, and a driving assembly for controlling the folding plate to switch its form is arranged therein. After the driving assembly controls the folding plate to unfold, the raw materials are stacked on the folding plate. After the driving assembly controls the folding plate to fold, the raw materials fall into the folding area above the folding plate. And when the driving assembly controls the folding plate to switch its form, the driving assembly drives the eccentric wheel to rotate through the linkage assembly;

[0010] When the lifting frame rises to the highest horizontal position, the load-carrying frame abuts against the preheating frame. At this time, the driving assembly controls the folding plate to fold, and a temporary channel is formed between the driving assembly and the load-carrying frame. Subsequently, the first cylinder extends, and the moving plate pushes the calcined raw materials into the temporary channel and fills the folding area at the bottom of the folding plate. When the lifting frame descends to the lowest horizontal height, the load-carrying frame is replaced.

[0011] As a further solution of the present invention: The driving assembly includes a translation plate and a second cylinder. Both translation plates are slidably installed in the preheating frame, and the two translation plates are respectively rotatably connected to both ends of the folding plate. Both second cylinders are fixedly installed on the vertical frame. The movable end of each second cylinder is connected to the translation plate through a connecting assembly. When the second cylinder contracts, it drives the translation plate to stretch the folding plate and drives the folding plate to unfold. When the second cylinder extends, it drives the translation plate to squeeze the folding plate and drives the folding plate to fold. And when the lifting frame rises to the highest horizontal position at this time, the load-carrying frame abuts against the translation plate, thereby forming a temporary channel.

[0012] As a further solution of the present invention: The linkage assembly includes a first gear, a first rack plate, a first spring and an extension block. The first gear is rotatably installed on the load-carrying frame and is coaxially fixedly installed with the shaft of the eccentric wheel. The first rack plate is slidably installed on the load-carrying frame. The tooth block at the bottom thereof meshes with the first gear, and one end thereof is connected to the load-carrying frame through a first spring. The pre-tightening force of the first spring makes the first rack plate away from the first gear. The extension block is fixedly installed on one translation plate and abuts against the end of the first rack plate away from the first spring. When the folding plate switches its form, the translation plate drives the extension block to push the first rack plate to move and compress the first spring.

[0013] As a further solution of the present invention: Two limit blocks are fixedly installed on the loading frame, and the convex block on the first rack plate is located between the two limit blocks.

[0014] As a further solution of the present invention: The preheating frame is rotatably installed on the vertical frame and is driven by a rotating assembly to rotate. An opening and closing plate is arranged on the preheating frame. When the lifting frame descends to the lowest horizontal height, the rotating assembly drives the preheating frame to rotate so that the horizontal height of the opening and closing plate decreases, and at this time the opening and closing plate opens.

[0015] As a further solution of the present invention: The rotating assembly includes a second gear and a second rack plate. The second gear is fixedly installed on the preheating frame, is rotatably installed on the vertical frame, and its axis coincides with the axis of the translation plate. The second rack plate is slidably installed on the vertical frame, meshes with the second gear, and is driven by a second driving source to move.

[0016] As a further solution of the present invention: The connecting assembly includes a round block and a sleeve block. The sleeve block is coaxially and fixedly connected to the movable end of the second cylinder. The round block is rotatably installed in the sleeve block, and the two are coaxially arranged. The round block is coaxially and fixedly connected to the translation plate.

[0017] As a further solution of the present invention: An opening is provided on the bottom plate, and the fixed frame is fixedly installed in the opening. When the lifting frame moves from the lowest horizontal height to the highest horizontal height, it will pass through the opening.

[0018] Advantages of the present invention:

[0019] 1. In the present invention, the folding plate that can be unfolded and folded in the preheating frame is used to carry raw materials, while the moving plate in the loading frame carries the roasted raw materials carrying high-temperature heat. After the folding plate is folded, the raw materials fall into the folding area, expanding the contact area with the folding plate. At this time, the moving plate pushes the roasted raw materials close to the folding plate. At this time, the triangular shape of the folded folding plate can squeeze and guide the roasted raw materials piled on the moving plate into the folding area below the folding plate. At this time, only the folding plate separates the roasted raw materials and the raw materials. The high temperature carried by the roasted raw materials can directly preheat the raw materials at high temperature. And after a period of heat exchange, the raw materials on the folding plate and the roasted raw materials on the moving plate can be redistributed, fully releasing the heat in the piled roasted raw materials to preheat the raw materials at high temperature. In this way, the high-temperature heat carried by the roasted raw materials just discharged from the rotary kiln can be fully utilized, avoiding the problem of large heat loss caused by using an intermediate transmission medium to transfer heat.

[0020] 2. In the present invention, after the calcined raw materials and the raw materials exchange heat and the preheating of the raw materials is completed, in fact, the high temperature of the calcined raw materials can also be used to heat water, causing the water to boil and generate steam. When the lifting frame descends to the lowest level, after replacing the loading frame, the heat-exchanged calcined raw materials can be subjected to the above operation to exchange heat with water, thereby further utilizing the waste heat.

[0021] 3. In the present invention, when the lifting frame descends to the lowest horizontal height, the rotating assembly drives the preheating frame to rotate, causing the horizontal height of the opening and closing plate to decrease. At this time, the preheating frame is in an inclined state, that is, the raw materials in the preheating frame will gather at the opening and closing plate. At this time, when the opening and closing plate is opened under the action of gravity, the raw materials can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the drawings.

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the structure when the lifting frame rises in the present invention;

[0025] Figure 3 is in the present invention Figure 2 is a schematic diagram of the sectional structure of a partial structure;

[0026] Figure 4 is a schematic diagram of the structure of the preheating frame in the present invention;

[0027] Figure 5 is a schematic diagram of the structure of the loading frame in the present invention;

[0028] Figure 6 is a schematic diagram of the sectional structure of the loading frame in the present invention;

[0029] Figure 7 is a schematic diagram of the structure of the temporary passage in the present invention;

[0030] Figure 8 is a schematic diagram of the structure when the moving plate moves upward in the present invention;

[0031] Figure 9 is in the present invention Figure 8 is a schematic diagram of the overall structure;

[0032] Figure 10 is a schematic diagram of the structure of the vertical frame in the present invention;

[0033] Figure 11 is a schematic diagram of the structure when the folding plate is deeply folded in the present invention;

[0034] Figure 12 is a schematic diagram of the sectional structure of the folding plate in the present invention;

[0035] Figure 13 It is a schematic structural view of the supporting plate in the present invention;

[0036] Figure 14 It is a schematic structural view of the eccentric wheel driving the moving plate to move upward in the present invention;

[0037] Figure 15 It is a schematic structural view of the connecting component in the present invention;

[0038] Figure 16 It is a schematic structural view when the preheating frame discharges materials in the present invention.

[0039] In the figure: 1, bottom plate; 101, opening; 2, vertical frame; 3, preheating frame; 301, opening and closing plate; 4, folding plate; 5, fixing frame; 6, lifting frame; 7, loading frame; 701, first cylinder; 702, limiting block; 8, moving plate; 9, driving component; 901, translation plate; 902, second cylinder; 10, connecting component; 1001, round block; 1002, sleeve block; 11, eccentric wheel; 12, linkage component; 1201, first gear; 1202, first rack plate; 1203, first spring; 1204, extension block; 13, second gear; 14, second rack plate; 15, supporting plate; 16, second spring; 17, temporary passage; 18, rotating component. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] Please refer to Figures 1 - 16 As shown in the figure, the present invention is a rotary kiln waste heat recovery system for barite roasting, including:

[0042] The bottom plate 1 is fixedly installed with a vertical frame 2 thereon, and a fixing frame 5 is arranged thereon. The lifting frame 6 is slidably installed on the fixing frame 5, and the lifting frame 6 is driven by a first driving source to lift;

[0043] The load-bearing frame 7 is placed on the lifting frame 6, and a moving plate 8 is slidably installed therein. The moving plate 8 is used to carry the roasted raw materials discharged from the rotary kiln. The load-bearing frame 7 is connected to a supporting plate 15 through a second spring 16, and an eccentric wheel 11 is rotatably installed therein. The eccentric wheel 11 is driven by a linkage assembly 12 to rotate. A first cylinder 701 is fixedly installed in the load-bearing frame 7. When the first cylinder 701 contracts, the moving plate 8 descends and abuts against the second spring 16 and the eccentric wheel 11. At this time, the rotation of the eccentric wheel 11 will drive the moving plate 8 to vibrate. When the first cylinder 701 extends, its movable end pushes the moving plate 8 to rise; and

[0044] The preheating frame 3 is arranged on the vertical frame 2 and is located above the load-bearing frame 7. A folding plate 4 for carrying raw materials is arranged in the preheating frame 3, and a driving assembly 9 for controlling the folding plate 4 to switch its form is arranged therein. After the driving assembly 9 controls the folding plate 4 to unfold, the raw materials are stacked on the folding plate 4. After the driving assembly 9 controls the folding plate 4 to fold, the raw materials fall into the folding area above the folding plate 4. When the driving assembly 9 controls the folding plate 4 to switch its form, the driving assembly 9 drives the eccentric wheel 11 to rotate through the linkage assembly 12;

[0045] When the lifting frame 6 rises to the highest horizontal position, the load-bearing frame 7 abuts against the preheating frame 3. At this time, the driving assembly 9 controls the folding plate 4 to fold, and a temporary channel 17 is formed between the driving assembly 9 and the load-bearing frame 7. Subsequently, the first cylinder 701 extends, and the moving plate 8 pushes the roasted raw materials into the temporary channel 17 and fills the folding area at the bottom of the folding plate 4. When the lifting frame 6 descends to the lowest horizontal height, the load-bearing frame 7 is replaced.

[0046] In one case of this embodiment, the first driving source can be selected from components such as electric cylinders and electric telescopic rods, or other mechanisms capable of realizing linear reciprocating motion can also be selected. This embodiment does not make specific limitations here.

[0047] The working principle of the present invention: After the barite raw materials roasted in the rotary kiln are discharged, they are poured into the load-bearing frame 7, ensuring that the first cylinder 701 is in a contracted state. At this time, the moving plate 8 descends and abuts against the second spring 16 and the eccentric wheel 11, as Figure 5 and Figure 6 shown. Then, the barite raw materials about to enter the rotary kiln for roasting are poured into the preheating frame 3, ensuring that the driving assembly 9 controls the folding plate 4 to be in an unfolded state. At this time, the raw materials will be stacked on the folding plate 4. Then, the load-bearing frame 7 is placed on the lifting frame 6. At this time, the state is as Figure 1 shown;

[0048] As Figure 2 shown, subsequently, the lifting frame 6 is driven by the first driving source to rise to the highest horizontal position. At this time, the positions of the moving plate 8 and the folding plate 4 are as Figure 2As shown, the raw materials are still piled up on the folding plate 4. After roasting, the raw materials are piled up on the moving plate 8. Subsequently, as Figure 7 shown, the driving component 9 is used to control the folding plate 4 to switch to the folded state. At this time, the raw materials will fall into the folding area on the folding plate 4. In this way, within the area defined by the moving plate 8, the contact area between the raw materials and the folding plate 4 can be significantly increased. And at this time, the driving component 9 and the loading frame 7 form a temporary channel 17. Subsequently, as Figure 8 shown, by extending the first cylinder 701, the moving plate 8 rises and pushes the roasted raw materials into the temporary channel 17. The triangular shape of the folded folding plate 4 can squeeze and guide the roasted raw materials piled up on the moving plate 8 into the folding area below the folding plate 4. At this time, the roasted raw materials and the raw materials are only separated by the folding plate 4. The high temperature carried by the roasted raw materials can directly preheat the raw materials at high temperature, effectively utilizing the high-temperature heat carried by the roasted raw materials when they are just discharged from the rotary kiln;

[0049] And after a period of heat exchange between the raw materials near the folding plate 4 and the roasted raw materials, the first cylinder 701 contracts, so that the roasted raw materials return to the loading frame 7 from the temporary channel 17, and the moving plate 8 moves from Figure 13 back to Figure 6 the state shown. At this time, the driving component 9 controls the folding plate 4 to frequently switch its shape, and the folding plate 4 continuously unfolds and folds. This process will redistribute the raw materials on the folding plate 4. In this way, the raw materials that were not originally in the folding area can fall into the folding area. At the same time, the driving component 9 will drive the eccentric wheel 11 to rotate through the linkage component 12. When the eccentric wheel 11 rotates, it will drive the moving plate 8 to continuously rise and fall. Specifically, the moving plate 8 switches between Figure 14 and Figure 6 . And in Figure 14 , the moving plate 8 is at a high position. When the eccentric wheel 11 turns away from the moving plate 8, due to the elasticity of the second spring 16, the supporting plate 15 will support the moving plate 8. At this time, the moving plate 8 will slowly descend. And during the descending process of the moving plate 8, the eccentric wheel 11 has already rotated one circle and hit the moving plate 8, thus generating vibration. The continuous vibration will also redistribute the roasted raw materials on the moving plate 8, so as to fully release the heat in the piled-up roasted raw materials. In this way, the heat in the roasted raw materials can be recovered and utilized more fully;

[0050] And since the temperature required for preheating the barite raw materials is much higher than the temperature for heating water to the boiling state, when the roasted raw materials and the raw materials exchange heat and complete the preheating of the raw materials, in fact, the high temperature of the roasted raw materials can also be used to heat water to make the water boil and generate steam. When the lifting frame 6 descends to the lowest level, after replacing the loading frame 7, the roasted raw materials after heat exchange can be subjected to the above operations to exchange heat with water, so as to further utilize the waste heat.

[0051] As Figures 1 - 16As shown, as a preferred embodiment of the present invention, the driving assembly 9 includes a translation plate 901 and a second cylinder 902. Both of the translation plates 901 are slidably installed in the preheating frame 3, and the two translation plates 901 are respectively rotatably connected to both ends of the folding plate 4. Both of the second cylinders 902 are fixedly installed on the vertical frame 2, and the movable end of each second cylinder 902 is connected to the translation plate 901 through a connecting assembly 10. When the second cylinder 902 contracts, it drives the translation plate 901 to stretch the folding plate 4 and drive the folding plate 4 to unfold. When the second cylinder 902 extends, it drives the translation plate 901 to squeeze the folding plate 4 and drive the folding plate 4 to fold. And when the lifting frame 6 rises to the highest horizontal position at this time, the loading frame 7 abuts against the translation plate 901, thereby forming a temporary passage 17.

[0052] In actual application of this embodiment, as Figure 12 shown, the two translation plates 901 are respectively rotatably connected to both ends of the folding plate 4. As Figure 4 and Figure 11 the change of the folding plate 4 in, when the translation plate 901 moves in the preheating frame 3, it will drive the folding plate 4 to unfold and fold. And as Figure 3 and Figure 7 shown, when the second cylinder 902 extends, it will drive the translation plate 901 to squeeze the folding plate 4, thereby driving the folding plate 4 to fold. And when the second cylinder 902 contracts, it drives the translation plate 901 to stretch the folding plate 4 and drive the folding plate 4 to unfold. In Figure 7 when the folding plate 4 is in the folded state, that is, the raw material falls into the folded area inside the folding plate 4, it can be seen that the translation plate 901 and the loading frame 7 form a temporary passage 17. At this time, the roasting raw material can be brought close to the folding plate 4 by the rising of the moving plate 8, so as to preheat the raw material.

[0053] As Figures 1 - 15 shown, as a preferred embodiment of the present invention, the linkage assembly 12 includes a first gear 1201, a first rack plate 1202, a first spring 1203 and an extension block 1204. The first gear 1201 is rotatably installed on the loading frame 7, and it is coaxially fixedly installed with the rotating shaft of the eccentric wheel 11. The first rack plate 1202 is slidably installed on the loading frame 7, the tooth block at its bottom meshes with the first gear 1201, and one end of it is connected to the loading frame 7 through the first spring 1203. The pre-tightening force of the first spring 1203 makes the first rack plate 1202 away from the first gear 1201. The extension block 1204 is fixedly installed on one translation plate 901, and it abuts against the end of the first rack plate 1202 away from the first spring 1203. When the folding plate 4 switches its form, the translation plate 901 drives the extension block 1204 to push the first rack plate 1202 to move and compress the first spring 1203.

[0054] In actual application of this embodiment, as Figure 5Taking the shown as an example, since the first rack plate 1202 meshes with the first gear 1201, when the first rack plate 1202 is pressured and moves to compress the first spring 1203, it will drive the first gear 1201 to rotate, thereby causing the eccentric wheel 11 to rotate and drive the moving plate 8 to vibrate. When the pressure on the first rack plate 1202 disappears, the pre-tightening force of the first spring 1203 will cause the first rack plate 1202 to move back to its original position, and this moving process will also drive the eccentric wheel 11 to rotate. And as Figure 2 shown, when the extension block 1204 abuts against the first rack plate 1202, when the second cylinder 902 drives the translation plate 901 to reciprocate, it is the source of the pressure on the first rack plate 1202. And as Figure 3 and Figure 7 shown, at this time the moving plate 8 descends into the eccentric wheel 11, indicating that the calcining raw materials are located within the moving plate 8. At this time, by driving the translation plate 901 to reciprocate through the second cylinder 902, it will drive the folding plate 4 to continuously change its shape, thereby achieving the purpose of jittering the raw materials above the folding plate 4, allowing the raw materials that have not been fully preheated to have the opportunity to fall into the folding area of the folding plate 4. And during this process, the movement of the first rack plate 1202 will also drive the first gear 1201 to rotate reciprocally, thereby driving the eccentric wheel 11 to rotate reciprocally. This process is like Figure 6 and Figure 14 the state of the moving plate 8 in, thus vibrating the calcining raw materials carried on the moving plate 8, making the piled-up calcining raw materials vibrate sufficiently to dissipate the accumulated high-temperature heat therein, and then restoring to Figure 8 the state, allowing the raw materials on the re-arranged folding plate 4 and the calcining raw materials on the moving plate 8 to conduct heat exchange, thereby fully recovering and utilizing the waste heat.

[0055] As Figures 2 - 11 shown, as a preferred embodiment of the present invention, two limiting blocks 702 are fixedly installed on the load-carrying frame 7, and the convex block on the first rack plate 1202 is located between the two limiting blocks 702.

[0056] In actual application of this embodiment, the movement range of the first rack plate 1202 is restricted by the two limiting blocks 702. Taking the example shown in Figure 5 as an example, when the first rack plate 1202 is at a position away from the first gear 1201 under the pre-tightening force of the first spring 1203, when the load-carrying frame 7 rises and abuts against the preheating frame 3, the first rack plate 1202 just abuts against the extension block 1204. At this time, taking the example shown in Figure 2 as an example, thus eliminating the need for manual adjustment and improving the automation of the entire waste heat recovery system.

[0057] As Figures 1 - 16As shown, as a preferred embodiment of the present invention, the preheating frame 3 is rotatably mounted on the vertical frame 2 and is driven to rotate by the rotating assembly 18. An opening and closing plate 301 is provided on the preheating frame 3. When the lifting frame 6 descends to the lowest horizontal height, the rotating assembly 18 drives the preheating frame 3 to rotate, causing the horizontal height of the opening and closing plate 301 to decrease. At this time, the opening and closing plate 301 opens.

[0058] In actual application of this embodiment, since the raw materials on the preheating frame 3 need to be discharged after preheating in order to carry out the next round of raw material preheating and waste heat recovery work, and it is difficult to discharge the materials when the preheating frame 3 is in a horizontal state. Therefore, when the lifting frame 6 descends to the lowest horizontal height, the rotating assembly 18 drives the preheating frame 3 to rotate, causing the horizontal height of the opening and closing plate 301 to decrease. That is, the raw materials in the preheating frame 3 will gather at the opening and closing plate 301. At this time, when the opening and closing plate 301 opens, under the action of gravity, the raw materials can be discharged. This process is as Figure 16 shown.

[0059] As Figures 1 - 16 shown, as a preferred embodiment of the present invention, the rotating assembly 18 includes a second gear 13 and a second rack plate 14. The second gear 13 is fixedly mounted on the preheating frame 3, is rotatably mounted on the vertical frame 2, and its axis coincides with the axis of the translation plate 901. The second rack plate 14 is slidably mounted on the vertical frame 2, meshes with the second gear 13, and is driven to move by a second driving source.

[0060] In one case of this embodiment, the second driving source can be selected from components such as electric cylinders and electric telescopic rods, and other mechanisms capable of realizing linear reciprocating motion can also be selected. This embodiment does not make specific limitations here.

[0061] In actual application of this embodiment, since the second rack plate 14 meshes with the second gear 13, when the second driving source drives the second rack plate 14 to move, the second rack plate 14 will drive the second gear 13 to rotate, and the second gear 13 will cause the preheating frame 3 to rotate, thereby realizing the state of the preheating frame 3 for inclined discharging, as Figure 16 shown. When the second driving source drives the second rack plate 14 to retract to its original position, at this time, the preheating frame 3 will also return to its original position, so as to carry new raw materials for the next round of raw material preheating.

[0062] As Figures 1 - 16 shown, as a preferred embodiment of the present invention, the connecting assembly 10 includes a round block 1001 and a sleeve block 1002. The sleeve block 1002 is coaxially and fixedly connected to the movable end of the second cylinder 902. The round block 1001 is rotatably mounted in the sleeve block 1002, and the two are coaxially arranged. The round block 1001 is coaxially and fixedly connected to the translation plate 901.

[0063] In practical application of this embodiment, through the coaxial fixed connection between the circular block 1001 and the translation plate 901, the axis of the translation plate 901 coincides with the axis of the second gear 13, and the preheating frame 3 rotates around the axis of the second gear 13. Therefore, when discharging the preheated raw materials in the preheating frame 3 obliquely, before and after the preheating frame 3 rotates, the axes of the second cylinder 902 and the translation plate 901 remain unchanged, and the translation plate 901 can always be controlled to move through the second cylinder 902. Thus, when discharging the preheating frame 3, the folding plate 4 can be controlled to switch its form, thereby accelerating the process of discharging the raw materials.

[0064] As Figures 1 - 15 shown, as a preferred embodiment of the present invention, an opening 101 is formed on the bottom plate 1, and the fixed frame 5 is fixedly installed in the opening 101. When the lifting frame 6 moves from the lowest horizontal height to the highest horizontal height, it will pass through the opening 101.

[0065] In practical application of this embodiment, since the lifting frame 6 will pass through the opening 101 when it moves from the lowest horizontal height to the highest horizontal height, this means that when the lifting frame 6 is in the highest horizontal position and the barite raw materials are preheated by the calcined raw materials, the loading frame 7 is located above the bottom plate 1, and when the lifting frame 6 is in the lowest horizontal position, the loading frame 7 can be replaced, that is, when replacing the calcined raw materials, the loading frame 7 is located below the bottom plate 1. In this way, the upper and lower regions of the bottom plate 1 are divided into different working areas corresponding to different working contents, making the processing process more reasonable.

[0066] The above has described a detailed description of an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A waste heat recovery system for a rotary kiln used in barite roasting, characterized in that, Comprising: A bottom plate (1) on which a vertical frame (2) is fixedly installed, and a fixing frame (5) is provided thereon. A lifting frame (6) is slidably installed on the fixing frame (5), and the lifting frame (6) is driven by a first driving source to lift and lower. A loading frame (7) is placed on the lifting frame (6), and a moving plate (8) is slidably installed therein. The moving plate (8) is used to carry the calcined raw materials discharged from the rotary kiln. The loading frame (7) is connected to a supporting plate (15) through a second spring (16), and an eccentric wheel (11) is rotatably installed therein. The eccentric wheel (11) is driven by a linkage assembly (12) to rotate. A first cylinder (701) is fixedly installed in the loading frame (7). When the first cylinder (701) contracts, the moving plate (8) descends and abuts against the second spring (16) and the eccentric wheel (11). At this time, the rotation of the eccentric wheel (11) will drive the moving plate (8) to vibrate. When the first cylinder (701) extends, its movable end pushes the moving plate (8) to rise; and A preheating frame (3) is provided on the vertical frame (2) and is located above the loading frame (7). A folding plate (4) for carrying raw materials is provided in the preheating frame (3), and a driving assembly (9) for controlling the folding plate (4) to switch its form is provided therein. After the driving assembly (9) controls the folding plate (4) to unfold, the raw materials are stacked on the folding plate (4). After the driving assembly (9) controls the folding plate (4) to fold, the raw materials fall into the folding area above the folding plate (4). And when the driving assembly (9) controls the folding plate (4) to switch its form, the driving assembly (9) drives the eccentric wheel (11) to rotate through the linkage assembly (12); When the lifting frame (6) rises to the highest horizontal position, the loading frame (7) abuts against the preheating frame (3). At this time, the driving assembly (9) controls the folding plate (4) to fold, and the driving assembly (9) and the loading frame (7) form a temporary passage (17). Subsequently, the first cylinder (701) extends, and the moving plate (8) pushes the calcined raw materials into the temporary passage (17) and fills the folding area at the bottom of the folding plate (4). When the lifting frame (6) descends to the lowest horizontal height, the loading frame (7) is replaced.

2. The waste heat recovery system for a rotary kiln used in barite roasting according to claim 1, wherein, The driving assembly (9) includes a translation plate (901) and a second cylinder (902). The two translation plates (901) are both slidably installed in the preheating frame (3), and the two translation plates (901) are respectively rotatably connected to both ends of the folding plate (4). The two second cylinders (902) are both fixedly installed on the vertical frame (2). The movable end of each second cylinder (902) is connected to the translation plate (901) through a connecting assembly (10). When the second cylinder (902) contracts, it drives the translation plate (901) to stretch the folding plate (4) and drive the folding plate (4) to unfold. When the second cylinder (902) extends, it drives the translation plate (901) to squeeze the folding plate (4) and drive the folding plate (4) to fold. And when the lifting frame (6) rises to the highest horizontal position, the loading frame (7) abuts against the translation plate (901), thereby forming a temporary passage (17).

3. A rotary kiln waste heat recovery system for barite roasting according to claim 2, characterized in that, The linkage component (12) includes a first gear (1201), a first rack plate (1202), a first spring (1203) and an extension block (1204). The first gear (1201) is rotatably installed on the loading frame (7), and is coaxially and fixedly installed with the rotating shaft of the eccentric wheel (11). The first rack plate (1202) is slidably installed on the loading frame (7), the tooth block at its bottom meshes with the first gear (1201), and one end of it is connected to the loading frame (7) through the first spring (1203). The pre-tightening force of the first spring (1203) causes the first rack plate (1202) to move away from the first gear (1201). The extension block (1204) is fixedly installed on a translation plate (901), and abuts against the end of the first rack plate (1202) away from the first spring (1203). When the folding plate (4) switches its form, the translation plate (901) drives the extension block (1204) to push the first rack plate (1202) to move and compress the first spring (1203).

4. A rotary kiln waste heat recovery system for barite roasting according to claim 3, characterized in that, Two limit blocks (702) are fixedly installed on the loading frame (7), and the convex block on the first rack plate (1202) is located between the two limit blocks (702).

5. A rotary kiln waste heat recovery system for barite roasting according to claim 2, characterized in that, The preheating frame (3) is rotatably installed on the vertical frame (2), and is driven by a rotating component (18) to rotate. An opening and closing plate (301) is arranged on the preheating frame (3). When the lifting frame (6) descends to the lowest horizontal height, the rotating component (18) drives the preheating frame (3) to rotate so that the horizontal height of the opening and closing plate (301) decreases, and at this time the opening and closing plate (301) opens.

6. A rotary kiln waste heat recovery system for barite roasting according to claim 5, characterized in that, The rotating component (18) includes a second gear (13) and a second rack plate (14). The second gear (13) is fixedly installed on the preheating frame (3), is rotatably installed on the vertical frame (2), and its axis coincides with the axis of the translation plate (901). The second rack plate (14) is slidably installed on the vertical frame (2), meshes with the second gear (13), and is driven by a second driving source to move.

7. A waste heat recovery system for a rotary kiln used in barite roasting according to claim 6, characterized in that, The connecting component (10) includes a round block (1001) and a sleeve block (1002). The sleeve block (1002) is coaxially and fixedly connected to the movable end of the second cylinder (902). The round block (1001) is rotatably installed in the sleeve block (1002), and the two are coaxially arranged. The round block (1001) is coaxially and fixedly connected to the translation plate (901).

8. A waste heat recovery system for a rotary kiln used in barite roasting according to claim 1, characterized in that, An opening (101) is formed on the bottom plate (1), and the fixing frame (5) is fixedly installed in the opening (101). When the lifting frame (6) moves from the lowest horizontal height to the highest horizontal height, it will pass through the opening (101).

Images