High-temperature flue gas utilization device for furnace

Abstract

The present invention relates to the technical field of copper processing. Disclosed is a high-temperature flue gas utilization device for a furnace. The device comprises a preheating tank and a feeding mechanism. A lower end of the preheating tank is communicated with a feeding port of the furnace. The feeding mechanism is arranged above the preheating tank and conveys raw materials into the preheating tank. A plurality of layers of buffer mechanisms are arranged in layers up and down in the preheating tank. The buffer mechanisms each comprises a buffer member and a driving member. The driving members drive the buffer members to move, to enable raw materials on the buffer member of a former layer of buffer mechanisms to fall into the buffer member of a next layer of buffer mechanisms. A gap for a gas to pass through is provided between the buffer mechanisms and inner walls of the preheating tank. According to the above solution, the raw materials can be preheated by using the high-temperature flue gas generated by the furnace, so that the energy utilization rate in the production process is improved. In addition, according to the solution, the raw materials can be fed to the furnace in small quantities and many times by means of the plurality of buffer mechanisms, so that the adding speed and adding amount of the raw materials are conveniently and accurately controlled.

Description

A furnace high-temperature flue gas utilization device Technical Field

[0001] The present invention relates to the technical field of copper processing, in particular to a device for utilizing high-temperature flue gas from a melting furnace. Background Art

[0002] During the traditional copper and copper alloy tube and plate production process of raw material melting, a large amount of high-temperature flue gas is generated in the high-temperature furnace. Existing production equipment generally directs the high-temperature flue gas from the high-temperature furnace and discharges it after environmental protection treatment. The heat in the flue gas is directly wasted, resulting in a certain amount of energy loss.

[0003] Summary of the Invention

[0004] In order to overcome the deficiency in the prior art that the high-temperature flue gas in the high-temperature furnace is directly discharged after environmental protection treatment, and the heat in the high-temperature flue gas is wasted, the present invention provides a high-temperature flue gas utilization device, which can use the high-temperature flue gas generated when the raw materials are melted in the furnace to preheat the raw materials, thereby improving the energy utilization rate in the production process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for utilizing high-temperature flue gas from a furnace comprises a preheating box and a feeding mechanism. The lower end of the preheating box is connected to the feeding port of the furnace. The feeding mechanism is arranged above the preheating box and transports raw materials into the preheating box. A multi-layer cache mechanism arranged in upper and lower layers is provided in the preheating box. The cache mechanism comprises a cache member and a driving member. The driving member drives the cache member to move so that the raw materials on the cache member of the upper cache mechanism fall onto the cache member of the lower cache mechanism. A gap for gas to pass through is provided between the inner walls of the cache mechanism preheating box.

[0007] In the above technical solution, the furnace continuously generates high-temperature flue gas during the production process. The lower end of the preheating box is connected to the feeding port of the furnace, so that the high-temperature flue gas in the furnace enters the preheating box. The high-temperature gas entering the preheating box can pass through the gap from bottom to top through each layer of buffer mechanism, heating the raw materials on each layer of buffer mechanism. The multi-layer buffer mechanism in the preheating box can increase the residence time of the raw materials in the preheating box, so that the raw materials can be fully heated by the high-temperature flue gas, improve the utilization rate of the waste heat of the high-temperature flue gas, and thus improve the energy utilization rate in the production process. In addition, this solution can add raw materials to the furnace in small quantities and multiple times through multiple buffer mechanisms, which is convenient for precise control of the addition speed and amount of raw materials. At the same time, preheating the raw materials in advance can effectively increase the melting speed after being put into the furnace, reduce the energy consumption of the furnace, and save production costs.

[0008] Preferably, the cache member has a cache state and a blanking state, and the driving member drives the cache member to switch between the cache state and the blanking state.

[0009] Preferably, one end of the cache component is hinged to the preheating box, and the other end of the cache component is suspended. When the cache component is in the caching state, the cache component is horizontally arranged, and when the cache component is in the unloading state, the cache component is tilted.

[0010] In the above technical solution, the cache member is a plate-like structure. When the cache member is in a cache state, raw materials can be stacked on top of the cache member. When the cache member is in a unloading state, the raw materials above the cache member can slide along the inclined cache member to the cache member below.

[0011] Preferably, each layer of the cache mechanism includes two cache elements and two driving elements, each driving element drives the corresponding cache element, and the two cache elements are arranged opposite to each other.

[0012] In the above technical solution, the two buffer components are independently set and can be controlled separately, and the raw materials of each layer can be further divided into two times for addition, so that the adding speed and amount of the raw materials can be more accurately controlled.

[0013] Preferably, the driving member is a vibrator, and the cache member is arranged at an angle. Among two adjacent cache members, the lower end of the upper cache member is aligned with the upper end of the lower cache member, so that when the vibrator drives the cache member to vibrate, the raw materials on the upper cache member fall onto the lower cache member; the cache member is connected to the preheating box through an elastic member.

[0014] In the above technical solution, the vibrator drives the cache element to vibrate, so that the raw materials on the cache element can slowly move downward, be flattened on the cache element and fall onto the cache element of the next layer, and finally fall into the furnace. The elastic element can ensure that the cache element has sufficient vibration amplitude.

[0015] Preferably, the inner cavity of the feeding mechanism is connected to the inner cavity of the preheating box, so that the gas in the preheating box can enter the inner cavity of the feeding mechanism and preheat the raw materials of the feeding mechanism once, and the raw materials in the feeding mechanism can enter the preheating box, so that the gas in the preheating box preheats the raw materials for a second time.

[0016] In the above technical solution, the high-temperature gas can provide primary and secondary waste heat to the raw materials in the feeding mechanism and preheating box respectively, which can increase the heat exchange time, achieve better preheating effect, and make full use of the thermal energy of the high-temperature flue gas.

[0017] Preferably, the feeding mechanism includes a roller and an air cylinder, the air cylinder is sleeved on the outside of the roller, a spiral pushing plate is provided on the inner wall of the roller, a feed port is provided at one end of the roller, and a discharge port is provided at the other end of the roller, an air inlet is provided at one end of the air cylinder, and an air outlet is provided at the other end of the air cylinder, the air inlet is connected to the preheating box, the discharge port is arranged above the buffer element, and the air outlet is connected to an external air extraction device.

[0018] In the above technical solution, the raw materials enter the drum from the feed port, and are transported to the side of the discharge port under the action of the spiral push plate. The high-temperature flue gas in the preheating box enters the air cylinder through the air inlet, heating the inner wall of the air cylinder. The air cylinder transfers the heat to the drum and heats the raw materials in the drum. The cooled flue gas is discharged from the air cylinder through the air outlet. After being heated, the raw materials in the drum enter the preheating box through the discharge port for further heating.

[0019] Preferably, the feeding mechanism includes a roller, a spiral push plate is provided on the inner wall of the roller, a feed port and an air outlet are provided at one end of the roller, and a discharge port is provided at the other end of the roller. The discharge port is arranged above the buffer element, and the air outlet is connected to an external air extraction device.

[0020] In the above technical solution, raw materials enter the drum from the feed inlet and are moved toward the discharge outlet by a spiral pusher. The high-temperature flue gas in the preheating box enters the drum through the discharge outlet, heating the raw materials inside the drum. The cooled flue gas is then discharged from the drum through the outlet. After being heated by the high-temperature flue gas, the raw materials in the drum enter the preheating box through the discharge outlet for further heating. In this solution, the high-temperature flue gas directly contacts the raw materials in the drum, resulting in a more effective heat exchange effect.

[0021] Preferably, the feeding mechanism includes a feeding cylinder and an air cylinder, the air cylinder is sleeved on the outside of the feeding cylinder, a feeding shaft is provided in the feeding cylinder, a spiral pushing plate is provided on the side wall of the feeding shaft, a feeding port is provided at one end of the feeding cylinder, and a discharge port is provided at the other end of the feeding cylinder, an air inlet is provided at one end of the air cylinder, and an air outlet is provided at the other end of the air cylinder, the air inlet is connected to the preheating box, the discharge port is arranged above the cache component, and the air outlet is connected to an external air extraction device.

[0022] In the above technical solution, the raw materials enter the feed barrel from the feed port, and the feed shaft drives the spiral pusher to rotate. Under the action of the spiral pusher, the raw materials are moved toward the discharge port. The high-temperature flue gas in the preheating box enters the air cylinder through the air inlet, heating the inner wall of the air cylinder. The air cylinder transfers the heat to the feed barrel and heats the raw materials in the feed barrel. The cooled flue gas is discharged from the air cylinder through the air outlet. After being heated, the raw materials in the feed barrel enter the preheating box through the discharge port for further heating. In this solution, the feed barrel and the air cylinder do not rotate relative to each other, the sealing structure is easier to set up, the sealing effect is better, and the high-temperature flue gas is not easy to leak from the connection between the feed barrel and the air cylinder.

[0023] Preferably, the feeding mechanism includes a smoke hood, a transverse movement assembly and a pushing assembly arranged above the transverse movement assembly. The lower end of the smoke hood is connected to the preheating box. The smoke hood is provided with a smoke exhaust pipe. The transverse movement assembly can move transversely relative to the smoke hood and one end of the transverse movement assembly extends into the smoke hood. The pushing assembly includes a lifting drive and a lifting plate. The lifting drive is installed on the preheating box, and the lifting drive drives the lifting plate to rise and fall.

[0024] In the above technical solution, the transverse moving assembly transports the raw materials outside the smoke hood into the smoke hood, and then the lifting drive in the pushing assembly drives the lifting plate to descend, so that the lifting plate blocks the raw materials on the transverse moving assembly, and then the transverse moving assembly retracts, and the raw materials on the transverse moving assembly are blocked by the lifting plate and fall into the preheating box under the smoke hood.

[0025] Preferably, a rotating shaft is fixed at the hinged position between the cache member and the preheating box, and the rotating shaft extends out of the preheating box and is fixed with a connecting member. The driving member includes a rotating driver and a driving shaft installed on the preheating box, and the rotating driver drives the driving shaft to rotate. A plurality of annular grooves arranged at intervals in the vertical direction are provided on the side wall of the driving shaft, and the annular groove includes a horizontal section and a curved section that are interconnected. The curved sections of the two adjacent annular grooves are staggered. One end of the connecting member extends into the annular groove and slides along the relative annular groove. When one end of the connecting member is located in the horizontal section, the cache member is in a caching state. When one end of the connecting member is located in the curved section, the cache member is in a blanking state. The positions where multiple connecting members are connected to the same driving shaft are on the same vertical line.

[0026] In the above technical solution, the driving shaft and the preheating box are fixed in the axial direction of the driving shaft, and the driving shaft can only rotate relative to the preheating box. The driving shaft is driven to rotate by the rotating driver. During the rotation of the driving shaft, the annular groove will rotate accordingly. Since one end of the connecting member extends into the annular groove and slides along the relative annular groove, the end of the connecting member extending into the annular groove will switch between the horizontal section and the curved section. When the end of the connecting member extending into the annular groove is located in the horizontal section, the cache member is in a cache state. When one end of the connecting member enters the curved section from the horizontal section, the connecting member will move a certain distance in the vertical direction, thereby driving the cache member to rotate a certain angle around the rotating shaft, so that the cache member switches from the cache state to the blanking state. As the driving shaft continues to rotate, one end of the connecting member will enter the horizontal section from the curved section, and the cache member switches from the blanking state back to the cache state. Because the curved sections of two adjacent annular grooves are staggered, in the adjacent annular grooves, when one end of one connecting member is in the curved section, the other end of the connecting member must be in the horizontal section. This allows the two cache members to be maintained in two different states at the same time, preventing the upper and lower cache members from being in the unloading state at the same time, causing the raw materials to not stop and directly pass through multiple cache mechanisms, ensuring that the raw materials have sufficient preheating time. In the above scheme, multiple cache members can be controlled by a rotating driver and a drive shaft, which can save the cost of the drive components. At the same time, after the equipment is installed, only the drive shaft needs to be continuously rotated to switch the cache members between the cache state and the unloading state according to the preset timing. There is no need to set up complex control programs and control elements, which reduces the control cost and makes the control more reliable. When the connecting piece is full of raw materials and one end of the connecting piece is in a horizontal section, the direction of the force applied to the driving shaft by the connecting piece is the same as the axial direction of the driving shaft. There is no force applied to the driving shaft in the horizontal direction, and the rotation of the driving shaft is hardly affected. Therefore, the rotary drive can adopt a smaller torque specification, and the cost of the rotary drive is lower. When the rotary drive stops rotating, the connecting piece can be locked to keep the cache piece in a cache state or a feeding state, making the state switching of the cache piece more stable. At the same time, there is no need to set up an additional locking mechanism, further reducing the cost of components.

[0027] Preferably, in the plurality of annular grooves, any two curved sections are staggered. The above technical solution can ensure that only one buffer element is in the open state at the same time.

[0028] Preferably, when the drive shaft rotates, the lower connector of any two connectors passes through the curved section before the upper connector; or, when the drive shaft rotates, the upper connector of any two connectors passes through the curved section before the lower connector. In the above technical solution, when the drive shaft rotates, the buffering elements can be switched from the buffering state to the unloading state in a bottom-to-top or top-to-bottom order.

[0029] Preferably, the connector is provided with a contact shaft, the contact shaft being rotatably connected to the connector, one end of the contact shaft extending into the annular groove, and the connector being connected to the annular groove via the contact shaft. The contact shaft can convert sliding friction between the connector and the sidewall of the annular groove into rolling friction.

[0030] Preferably, each layer of the cache mechanism includes two cache components, the two cache components in the same layer of the cache mechanism are arranged opposite to each other, the ends of the two connecting components in the same layer of the cache mechanism are located in the same annular groove, and the above two connecting components are located on opposite sides of the drive shaft, so that the two cache components in the same layer of the cache mechanism are respectively in the unloading state and the caching state, and at most one of all the cache components is in the unloading state at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a structural schematic diagram of the present invention;

[0032] FIG2 is a schematic diagram of a partial structure of the present invention;

[0033] FIG3 is a second schematic diagram of a partial structure of the present invention;

[0034] FIG4 is a second structural diagram of the present invention;

[0035] FIG5 is a schematic structural diagram of Example 5 and Example 7;

[0036] FIG6 is a side view of the high-temperature flue gas utilization device in Example 5;

[0037] FIG7 is a schematic structural diagram of Example 5;

[0038] FIG8 is a schematic structural diagram of Example 8;

[0039] FIG9 is a structural diagram of Example 9;

[0040] FIG10 is a side view of the drive shaft in Example 9;

[0041] FIG11 is a partial enlarged view of point A in FIG9 ;

[0042] FIG12 is a second structural diagram of Example 9;

[0043] FIG13 is a schematic structural diagram of Example 10.

[0044] Figure: preheating box 1, buffer mechanism 1.0, buffer element 1.1, driving element 1.2, through hole 1.3, rotating shaft 1.4, connecting element 1.5, elastic element 1.6, contact shaft 1.7, gap 1.8, gas nozzle 1.9, feeding mechanism 2, roller 2.1, gas cylinder 2.2, spiral push plate 2.3, feeding port 2.4, discharging port 2.5, air inlet 2.6, air outlet 2.7, feeding cylinder 2.8, fume hood 2. 9. Transverse shift assembly 2.10, pusher assembly 2.11, lifting drive 2.11.1, lifting plate 2.11.2, exhaust pipe 2.12, feed shaft 2.13, lifting chain conveyor 3, feed port 3.1, leveling linear drive 4.1, leveling plate 4.2, drive shaft 5, annular groove 5.1, horizontal section 5.1.1, curved section 5.1.2, furnace 6, feed port 6.1, raw material 7, rotary drive 8. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] As shown in Figures 1 to 3, a device for utilizing high-temperature flue gas from a furnace includes a preheating box 1 and a feeding mechanism 2. The lower end of the preheating box 1 is connected to the feeding port 6.1 of the furnace 6. The feeding mechanism 2 is arranged above the preheating box 1 and conveys raw materials 7 into the preheating box 1. A multi-layer cache mechanism 1.0 arranged in upper and lower layers is provided in the preheating box 1. The cache mechanism 1.0 includes a cache member 1.1 and a driving member 1.2. The driving member 1.2 drives the cache member 1.1 to move so that the raw material 7 on the cache member 1.1 of the upper cache mechanism 1.0 falls onto the cache member 1.1 of the lower cache mechanism 1.0. A gap 1.8 for gas to pass through is provided between the cache mechanism 1.0 and the inner wall of the preheating box 1.

[0048] In the above technical solution, the furnace 6 will continuously generate high-temperature flue gas during the production process, and is connected to the feeding port 6.1 of the furnace 6 through the lower end of the preheating box 1, so that the high-temperature flue gas in the furnace 6 enters the preheating box 1. The high-temperature gas entering the preheating box 1 can pass through the various layers of cache mechanisms 1.0 from bottom to top through the gap 1.8, and heat the raw materials 7 on each layer of cache mechanisms 1.0. The multi-layer cache mechanisms 1.0 in the preheating box 1 can increase the residence time of the raw materials 7 in the preheating box 1, so that the raw materials 7 can be fully heated by the high-temperature flue gas, thereby improving the utilization rate of the waste heat of the high-temperature flue gas, thereby improving the energy utilization rate in the production process. In addition, this solution can add raw materials 7 into the furnace 6 in small amounts and multiple times through multiple cache mechanisms 1.0, which is convenient for precise control of the addition speed and addition amount of raw materials 7.

[0049] Preferably, the inner cavity of the feeding mechanism 2 is connected to the inner cavity of the preheating box 1, so that the gas in the preheating box 1 can enter the inner cavity of the feeding mechanism 1 and preheat the raw materials of the feeding mechanism 2 once, and the raw materials in the feeding mechanism 2 can enter the preheating box 1, so that the gas in the preheating box 1 preheats the raw materials for a second time.

[0050] In the above technical solution, the high-temperature gas can provide primary and secondary waste heat to the raw materials in the feeding mechanism 2 and the preheating box 1 respectively, which can increase the heat exchange time, achieve better preheating effect, and make full use of the thermal energy of the high-temperature flue gas.

[0051] Example 2:

[0052] As shown in Figures 1 and 2, based on Example 1, the buffer element 1.1 is a plate-like structure having a buffering state and a blanking state. The driver 1.2 drives the buffer element 1.1 to switch between the buffering state and the blanking state. One end of the buffer element 1.1 is hinged to the preheating box 1, and the other end of the buffer element 1.1 is suspended in the air. When in the buffering state, the buffer element 1.1 is horizontally arranged. When in the blanking state, the buffer element 1.1 is tilted.

[0053] In the above technical solution, the buffer element 1.1 switches between a buffering state and a feeding state to convey the raw materials 7 in the preheating box 1 downward layer by layer until they are placed into the melting furnace 6. When the buffer element 1.1 is in the buffering state, the raw materials 7 can be stacked on top of the buffer element 1.1. When the buffer element 1.1 is in the feeding state, the raw materials 7 on the top of the buffer element 1.1 can slide along the inclined buffer element 1.1 to the buffer element 1.1 below.

[0054] Preferably, the buffer element 1.1 is provided with a plurality of through holes 1.3 through which gas can pass.

[0055] In the above technical solution, the through hole 1.3 allows the high-temperature flue gas entering the preheating box 1 to pass through the through hole 1.3 and enter the buffer element 1.1 to preheat the raw materials 7 on the buffer element 1.1, thereby increasing the preheating effect.

[0056] Preferably, the preheating box 1 is provided with a gas nozzle 1.9, directed toward the raw material 7 on the buffer element. In the above technical solution, when the furnace flue gas temperature is insufficient, natural gas is used to preheat the raw material 7, thereby ensuring the raw material's melting speed within the furnace, reducing process energy consumption, and saving production costs. When natural gas is needed to preheat the raw material 7, it can be injected through the gas nozzle 1.9. The natural gas injected into the preheating box 1 can be ignited by an igniter built into the gas nozzle 1.9, and the heat from the combustion of the natural gas can be used to preheat the raw material 7.

[0057] Example 3:

[0058] As shown in Figure 3, on the basis of Example 1, a rotating shaft 1.4 is fixed at the position where the cache member 1.1 is hinged to the preheating box 1. The rotating shaft 1.4 extends out of the preheating box 1 and is fixed with a connecting member 1.5. The driving member 1.2 is a linear drive. One end of the driving member 1.2 is hinged to the preheating box 1, and the other end of the preheating box 1 is hinged to the connecting member 1.5.

[0059] In the above technical solution, the extension and retraction of the driving member 1.2 can drive the connecting member 1.5 to rotate around the axis of the rotating shaft 1.4, and then drive the cache member 1.1 to rotate around the axis of the rotating shaft 1.4, so that the cache member 1.1 can switch between the caching state and the unloading state.

[0060] Preferably, each layer of the cache mechanism 1.0 includes two cache components 1.1 and two driving components 1.2, each driving component 1.2 drives the corresponding cache component 1.1, and the suspended ends of the two cache components 1.1 are arranged opposite to each other.

[0061] In the above technical solution, the two buffer elements 1.1 are independently provided and can be controlled separately, and each layer of raw material 7 can be further divided into two times for addition, so that the adding speed and amount of the raw material 7 can be more accurately controlled.

[0062] Example 4:

[0063] As shown in Figures 1 to 4, on the basis of Example 3, the feeding mechanism 2 includes a smoke hood 2.9, a transverse movement component 2.10 and a pushing component 2.11 arranged above the transverse movement component 2.10, the lower end of the smoke hood 2.9 is connected to the preheating box 1, and a smoke exhaust pipe 2.12 is provided on the smoke hood 2.9. The transverse movement component 2.10 can move transversely relative to the smoke hood 2.9 and one end of the transverse movement component 2.10 extends into the smoke hood 2.9. The pushing component 2.11 includes a lifting drive 2.11.1 and a lifting plate 2.11.2. The lifting drive 2.11.1 is installed on the preheating box 1, and the lifting drive 2.11.1 drives the lifting plate 2.11.2 to rise and fall.

[0064] In the above technical solution, the transverse moving assembly 2.10 transports the raw materials 7 outside the smoke hood 2.9 into the smoke hood 2.9, and then the lifting driver 2.11.1 in the pushing assembly 2.11 drives the lifting plate 2.11.2 to descend, so that the lifting plate 2.11.2 blocks the raw materials 7 on the transverse moving assembly 2.10. Then the transverse moving assembly 2.10 retracts, and the raw materials 7 on the transverse moving assembly 2.10 are blocked by the lifting plate 2.11.2 and fall into the preheating box 1 below the smoke hood 2.9. The transverse moving assembly 2.10 includes a linear drive mechanism and a transverse frame. The raw materials 7 can be placed on the transverse frame. The linear drive mechanism drives the transverse frame to move horizontally, so that the transverse frame can extend into or out of the smoke hood 2.9. The exhaust pipe 2.12 is connected to the external exhaust device, and the high-temperature flue gas that has undergone heat exchange in the smoke hood 2.9 can be sucked away by the external exhaust device.

[0065] Preferably, the furnace high-temperature flue gas utilization device further comprises a lifting chain conveyor 3 for lifting and conveying the raw material 7 to the feeding mechanism 2, and the feeding port 3.1 of the lifting chain conveyor is aligned with the feeding port 2.4 of the feeding mechanism 2.

[0066] Preferably, a flattening linear driver 4.1 and a flattening plate 4.2 are provided above the feed mechanism 2. One end of the flattening plate 4.2 is hingedly connected to the feed mechanism 2. One end of the flattening linear driver 4.1 is hingedly connected to the feed mechanism 2. The other end of the flattening linear driver 4.1 is hingedly connected to the flattening plate 4.2, so that the flattening plate 4.2 swings back and forth under the action of the flattening linear driver 4.1. When the flattening linear driver 4.1 extends or contracts, one end of the flattening linear driver 4.1 is rotationally connected to the feed mechanism 2 and rotates relative to the feed mechanism 2, while the other end of the flattening linear driver 4.1 drives the flattening plate 4.2 to swing back and forth relative to the feed mechanism 2.

[0067] Example 5:

[0068] As shown in Figures 5 and 6 , based on Example 1, the buffer element 1.1 is connected to the preheating box 1 via an elastic member 1.6. The driving member 1.2 is a vibrator, and the buffer elements 1.1 are tilted. Of two adjacent buffer elements 1.1, the lower end of the upper buffer element 1.1 is aligned with the upper end of the lower buffer element 1.1. This allows the vibrator to vibrate the buffer elements 1.1, causing the raw material 7 on the upper buffer element 1.1 to fall onto the lower buffer element 1.1. One end of the buffer element 1.1 extends out of the furnace, and the vibrator is located outside the furnace.

[0069] In the above technical solution, the vibrator drives the buffer element 1.1 to vibrate, causing the raw material on the buffer element 1.1 to slowly move downward. The raw material is spread out on the buffer element 1.1 for sufficient heat exchange, and then, under the action of vibration, falls to the buffer element 1.1 on the next layer, and finally falls into the furnace. One end of the buffer element 1.1 extends out of the furnace 1, and the vibrator is located outside the furnace 1, which protects the vibrator from the high temperature environment inside the furnace and increases its service life.

[0070] Example 6:

[0071] As shown in Figures 5 to 7 , based on Example 5, the feeding mechanism 2 includes a roller 2.1 and an air cylinder 2.2. The air cylinder 2.2 is sleeved on the outside of the roller 2.1. A spiral pusher plate 2.3 is provided on the inner wall of the roller 2.1. A feed port 2.4 is provided at one end of the roller 2.1, and a discharge port 2.5 is provided at the other end of the roller 2.1. An air inlet 2.6 is provided at one end of the air cylinder 2.2, and an air outlet 2.7 is provided at the other end of the air cylinder 2.2. The air inlet 2.6 is connected to the preheating box 1 via a pipe, and high-temperature flue gas in the preheating box 1 can be introduced into the air inlet 2.6 through the pipe, so that the high-temperature flue gas undergoes heat exchange in the air cylinder 2.2. The discharge port 2.5 is located above the buffer element 1.1, and the air outlet 2.7 is connected to an external exhaust device. The high-temperature flue gas after heat exchange is sucked away by the external exhaust device through the air outlet 2.7. The roller 2.1 is driven to rotate by a rotary drive member.

[0072] In the above technical solution, the raw material enters the drum 2.1 from the feed port 2.4 and is transported toward the discharge port 2.5 by the action of the spiral pusher 2.3. The high-temperature flue gas in the preheating box 1 enters the air cylinder 2.2 through the air inlet 2.6, heating the inner wall of the air cylinder 2.2. The air cylinder 2.2 transfers the heat to the drum 2.1 and heats the raw material 7 in the drum 2.1. The cooled flue gas is discharged from the air cylinder 2.2 through the air outlet 2.7. After being heated, the raw material 7 in the drum 2.1 enters the preheating box 1 through the discharge port 2.5 for further heating.

[0073] Example 7:

[0074] As shown in Figure 5, on the basis of Example 5, the feeding mechanism 2 includes a roller 2.1, a spiral pushing plate 2.3 is provided on the inner wall of the roller 2.1, a feed port 2.4 and an air outlet 2.7 are provided at one end of the roller 2.1, and a discharge port 2.5 is provided at the other end of the roller 2.1. The discharge port 2.5 is arranged above the cache member 1.1, and the air outlet 2.7 is connected to an external air extraction device.

[0075] In the above technical solution, raw material 7 enters drum 2.1 through feed port 2.4. A spiral pusher 2.3 pushes raw material 7 toward discharge port 2.5. High-temperature flue gas from preheating chamber 1 enters drum 2.1 through discharge port 2.5, heating the raw material 7 within drum 2.1. The cooled flue gas is then drawn away by an external exhaust device through discharge port 2.7. After being heated by the high-temperature flue gas, the raw material 7 in drum 2.1 enters preheating chamber 1 through discharge port 2.5 for further heating. In this solution, direct contact between the high-temperature flue gas and the gas within drum 2.1 enhances heat exchange. Drum 2.1 is driven by a rotary drive member.

[0076] Example 8:

[0077] As shown in Figure 8, on the basis of Example 5, the feeding mechanism 2 includes a feeding cylinder 2.8 and an air cylinder 2.2, the air cylinder 2.2 is sleeved on the outside of the feeding cylinder 2.8, a feeding shaft 2.13 is provided in the feeding cylinder 2.8, and a spiral pushing plate 2.3 is provided on the side wall of the feeding shaft 2.13. A feeding port 2.4 is provided at one end of the feeding cylinder 2.8, and a discharge port 2.5 is provided at the other end of the feeding cylinder 2.8. An air inlet 2.6 is provided at one end of the air cylinder 2.2, and an air outlet 2.7 is provided at the other end of the air cylinder 2.2. The air inlet 2.6 is connected to the preheating box 1, the discharge port 2.5 is arranged above the cache component 1.1, and the air outlet 2.7 is connected to the external air extraction device.

[0078] In the above technical solution, raw material 7 enters feed barrel 2.8 from feed inlet 2.4. Feed shaft 2.13 drives spiral pusher plate 2.3 to rotate, which moves raw material 7 toward discharge port 2.5. High-temperature flue gas within preheating box 1 enters cylinder 2.2 through air inlet 2.6, heating the inner wall of cylinder 2.2. Cylinder 2.2 transfers heat to feed barrel 2.8, heating the raw material 7 within feed barrel 2.8. The cooled flue gas exits cylinder 2.2 through air outlet 2.7. After being heated, the raw material 7 within feed barrel 2.8 enters preheating box 1 through discharge port 2.5 for further heating. In this solution, feed barrel 2.8 and cylinder 2.2 do not rotate relative to each other, making the sealing structure easier to set up and achieving a better sealing effect. High-temperature flue gas is less likely to leak from the connection between feed barrel 2.8 and cylinder 2.2. The drum 2.1 is driven to rotate by a rotating drive member.

[0079] Example 9:

[0080] As shown in Figures 2, 9, 10, 11, and 12, based on Example 2, a rotating shaft 1.4 is fixed at the hinged connection between the buffer element 1.1 and the preheating box 1. The rotating shaft 1.4 extends out of the preheating box 1 and is fixed to a connecting member 1.5. The driving member 1.2 includes a rotary actuator 8 and a drive shaft 5 mounted on the preheating box 1. The rotary actuator 8 drives the drive shaft 5 to rotate. The sidewall of the drive shaft 5 is provided with a plurality of annular grooves 5.1 spaced vertically apart. Each annular groove 5.1 includes interconnected horizontal sections 5.1. 1 and a curved section 5.1.2, the curved sections 5.1.2 of two adjacent annular grooves 5.1 are staggered, one end of the connecting member 1.5 extends into the annular groove 5.1 and slides along the relative annular groove 5.1. When one end of the connecting member 1.5 is located in the horizontal section 5.1.1, the cache member 1.1 is in a cache state; when one end of the connecting member 1.5 is located in the curved section 5.1.2, the corresponding cache member 1.1 is in a blanking state, and the positions where multiple connecting members 1.5 are connected to the same drive shaft 5 are on the same vertical line.

[0081] In the above technical solution, the cache components 1.1 in the multi-layer cache mechanism 1.0 share a common driving component 1.2, or in other words, the driving components 1.2 in the multi-layer cache mechanism 1.0 are combined into an integral component, which can simultaneously drive multiple cache components 1.1 to move. The driving shaft 5 and the preheating box 1 are fixed in the axial direction of the driving shaft 5. The driving shaft 5 can only rotate relative to the preheating box 1. The driving shaft 5 is driven to rotate by the rotating driver 8. During the rotation of the driving shaft 5, the annular groove 5.1 will rotate accordingly. Since one end of the connecting component 1.5 extends into the annular groove 5.1 and slides along the relative annular groove 5.1, the end of the connecting component 1.5 extending into the annular groove 5.1 will switch between the horizontal section 5.1.1 and the curved section 5.1.2. When the end of the connecting component 1.5 extending into the annular groove 5.1 is located in the water, the connecting component 1.5 is in the horizontal section 5.1.1 and the curved section 5.1.2. When the drive shaft 5 is in the flat section 5.1.1, the cache member 1.1 is in the cache state. When one end of the connecting member 1.5 enters the curved section 5.1.2 from the horizontal section 5.1.1, the connecting member 1.5 will move a certain distance in the vertical direction, thereby driving the cache member 1.1 to rotate a certain angle around the rotating shaft 1.4, so that the cache member 1.1 switches from the cache state to the blanking state. As the driving shaft 5 continues to rotate, one end of the connecting member 1.5 will enter the horizontal section 5.1.1 from the curved section 5.1.2, and the cache member 1.1 switches from the blanking state to the cache state. Because the curved sections 5.1.2 of two adjacent annular grooves 5.1 are staggered, in two adjacent annular grooves 5.1, when one end of one connecting member 1.5 is in the curved section 5.1.2, the other end of the connecting member 1.5 is necessarily in the horizontal section 5.1.1. This allows the two buffer members 1.1 to be maintained in two different states at the same time, preventing the upper and lower buffer members 1.1 from being in the unloading state at the same time, causing the raw material 7 to not stop and directly pass over multiple buffer mechanisms 1.0, thus ensuring sufficient preheating time for the raw material 7. In the above scheme, multiple buffer members 1.1 can be controlled by a rotating driver 8 and a drive shaft 5, which can save the cost of the driver 1.2. At the same time, after the equipment is installed, only the drive shaft 5 needs to be continuously rotated to switch each buffer member 1.1 between the buffer state and the unloading state according to a preset timing. There is no need to set up complex control programs and control elements, which reduces control costs and makes the control more reliable. When the connecting member 1.5 is filled with raw materials 7 and one end of the connecting member 1.5 is in the horizontal section 5.1.1, the direction of the force exerted by the connecting member 1.5 on the drive shaft 5 is the same as the axial direction of the drive shaft 5. There is no force exerted on the drive shaft 5 in the horizontal direction, and the rotation of the drive shaft 5 is hardly affected. Therefore, the rotary driver 8 can adopt a smaller torque specification, and the rotary driver 8 has a lower cost. When the rotary driver 8 stops rotating, it can lock the connecting member 1.5, so that the cache member 1.1 remains in the cache state or the unloading state, making the state switching of the cache member 1.1 more stable. At the same time, there is no need to set up an additional locking mechanism, further reducing the cost of components.

[0082] Preferably, any two curved sections 5.1.2 in the plurality of annular grooves 5.1 are staggered. The above technical solution can ensure that only one buffer element 1.1 is in the open state at the same time.

[0083] Preferably, the connector 1.5 is provided with a contact shaft 1.7, which is rotatably connected to the connector 1.5. One end of the contact shaft 1.7 extends into the annular groove 5.1, and the connector 1.5 is connected to the annular groove 5.1 via the contact shaft 1.7. The contact shaft 1.7 can convert sliding friction between the connector 1.5 and the side wall of the annular groove 5.1 into rolling friction.

[0084] It can be understood that in one embodiment, when the drive shaft 5 rotates, among any two connecting parts 1.5, the connecting part 1.5 located at the bottom passes through the bending section 5.1.2 before the connecting part 1.5 located at the top. In the above technical solution, when the drive shaft 5 rotates, each cache part 1.1 can be switched from the caching state to the unloading state in sequence from bottom to top.

[0085] It is understood that in another embodiment, when the drive shaft 5 rotates, of any two connecting members 1.5, the upper connecting member 1.5 passes through the curved section 5.1.2 before the lower connecting member 1.5. In the above technical solution, when the drive shaft 5 rotates, each buffer member 1.1 can be switched from the buffering state to the unloading state in descending order.

[0086] It can be understood that in one embodiment, the connecting member and the buffer member are on the same side of the rotating shaft, and when the connecting member 1.5 flips downward, the buffer member also flips downward, and the curved section bends downward.

[0087] It is understandable that in another embodiment, as shown in FIG10 , the connecting member 1.5 and the buffer member 1.1 are located on opposite sides of the rotating shaft 1.4, and when the connecting member 1.5 flips upward, the buffer member 1.1 also flips downward, and the bending section 5.1.2 bends upward.

[0088] Example 10:

[0089] As shown in Figure 13, based on Example 9, each layer of the cache mechanism 1.0 includes two cache elements 1.1. The two cache elements 1.1 in the same layer of the cache mechanism 1.0 are arranged opposite each other. The ends of the two connecting elements 1.5 in the same layer of the cache mechanism 1.0 are located in the same annular groove 5.1, and the two connecting elements 1.5 are located on opposite sides of the drive shaft 5. This ensures that at most one of the two cache elements 1.1 in the same layer of the cache mechanism 1.0 is in the unloading state. Furthermore, at most one of all the cache elements 1.1 is in the unloading state at any one time.

[0090] In the above technical solution, the two buffer elements 1.1 in the same layer of the buffer mechanism 1.0 can further divide the feeding of each layer of raw material 7 into two batches, allowing for more precise control of the feeding speed and amount of raw material 7. Furthermore, all buffer elements 1.1 are controlled by a single drive shaft 5, enabling each buffer element 1.1 to switch between the buffering state and the feeding state according to a preset sequence. At most one buffer element 1.1 is in the feeding state at any one time, preventing raw material from directly passing over the buffer element 1.1.

[0091] It can be understood that in another embodiment, multiple upper and lower connecting members on the same side are driven by the same drive shaft, and the two drive shafts independently drive the connecting members on both sides, and the two drive shafts are driven to rotate by their respective corresponding rotation drivers.

Claims

1. A furnace high temperature flue gas utilization device, characterized in that: It includes a preheating box and a feeding mechanism, the lower end of the preheating box is connected to the feeding port of the melting furnace, the feeding mechanism is arranged above the preheating box and transports raw materials into the preheating box, a multi-layer cache mechanism arranged in upper and lower layers is arranged in the preheating box, the cache mechanism includes a cache member and a driving member, the driving member drives the cache member to move so that the raw materials on the cache member of the upper cache mechanism fall onto the cache member of the lower cache mechanism, and a gap for gas to pass is provided between the cache mechanism and the inner wall of the preheating box.

2. A furnace high temperature flue gas utilization device according to claim 1, characterized in that: The cache member has a cache state and a material discharge state, and the driving member drives the cache member to switch between the cache state and the material discharge state.

3. A furnace high temperature flue gas utilization device according to claim 2, characterized in that: One end of the buffer element is hinged to the preheating box, and the other end of the buffer element is suspended. When the buffer element is in a buffering state, the buffer element is horizontally arranged, and when the buffer element is in a feeding state, the buffer element is tiltedly arranged.

4. A furnace high temperature flue gas utilization device according to claim 3, characterized in that: Each layer of the cache mechanism includes two cache components and two driving components. Each driving component drives the corresponding cache component, and the two cache components are arranged opposite to each other.

5. The device for utilizing high-temperature flue gas from a melting furnace according to claim 1, characterized in that: The driving member is a vibrator, and the buffer member is arranged at an angle. Among two adjacent buffer members, the lower end of the upper buffer member is aligned with the high end of the lower buffer member, so that when the vibrator drives the buffer member to vibrate, the raw material on the upper buffer member falls onto the lower buffer member; the buffer member is connected to the preheating box through an elastic member.

6. The device for utilizing high-temperature flue gas from a melting furnace according to claim 1, characterized in that: The inner cavity of the feeding mechanism is connected with the inner cavity of the preheating box, so that the gas in the preheating box can enter the inner cavity of the feeding mechanism and preheat the raw materials of the feeding mechanism, and the raw materials in the feeding mechanism can enter the preheating box, so that the gas in the preheating box preheats the raw materials for a second time.

7. A furnace high temperature flue gas utilization device according to claim 6, characterized in that: The feeding mechanism includes a roller and an air cylinder, the air cylinder is sleeved on the outside of the roller, a spiral pushing plate is provided on the inner wall of the roller, a feed port is provided at one end of the roller, and a discharge port is provided at the other end of the roller, an air inlet is provided at one end of the air cylinder, and an air outlet is provided at the other end of the air cylinder, the air inlet is connected with the preheating box, the discharge port is arranged above the buffer element, and the air outlet is connected with an external air suction device.

8. The device for utilizing high-temperature flue gas from a melting furnace according to claim 6, characterized in that: The feeding mechanism includes a roller, a spiral push plate is provided on the inner wall of the roller, a feed port and an air outlet are provided at one end of the roller, a discharge port is provided at the other end of the roller, the discharge port is arranged above the buffer element, and the air outlet is connected to an external air extraction device.

9. The device for utilizing high-temperature flue gas from a melting furnace according to claim 6, characterized in that: The feeding mechanism includes a feeding cylinder and an air cylinder, the air cylinder is sleeved on the outside of the feeding cylinder, a feeding shaft is provided in the feeding cylinder, a spiral pushing plate is provided on the side wall of the feeding shaft, a feeding port is provided at one end of the feeding cylinder, and a discharge port is provided at the other end of the feeding cylinder, an air inlet is provided at one end of the air cylinder, and an air outlet is provided at the other end of the air cylinder, the air inlet is connected with the preheating box, the discharge port is arranged above the buffer element, and the air outlet is connected with an external air suction device.

10. The device for utilizing high-temperature flue gas from a melting furnace according to claim 1, characterized in that: The feeding mechanism includes a smoke collecting hood, a transverse movement assembly and a pushing assembly arranged above the transverse movement assembly. The lower end of the smoke collecting hood is connected to the preheating box. The smoke collecting hood is provided with a smoke exhaust pipe. The transverse movement assembly can move transversely relative to the smoke collecting hood and one end of the transverse movement assembly extends into the smoke collecting hood. The pushing assembly includes a lifting drive and a lifting plate. The lifting drive is installed on the preheating box, and the lifting drive drives the lifting plate to rise and fall.

11. The device for utilizing high-temperature flue gas from a melting furnace according to claim 3, characterized in that: A rotating shaft is fixed at the position where the cache member is hinged to the preheating box, and the rotating shaft extends out of the preheating box and is fixed with a connecting member. The driving member includes a rotating driver and a driving shaft installed on the preheating box, and the rotating driver drives the driving shaft to rotate. A plurality of annular grooves arranged at intervals in the vertical direction are provided on the side wall of the driving shaft, and the annular groove includes a horizontal section and a curved section that are interconnected, and the curved sections of two upper and lower adjacent annular grooves are staggered. One end of the connecting member extends into the annular groove and is slidably arranged along the relative annular groove. When one end of the connecting member is located in the horizontal section, the cache member is in a caching state, and when one end of the connecting member is located in the curved section, the cache member is in a feeding state, and the positions where multiple connecting members are connected to the same driving shaft are on the same vertical line.

12. A furnace high temperature flue gas utilization device according to claim 11, characterized in that: In the plurality of annular grooves, any two curved sections are staggered.

13. The furnace high temperature flue gas utilization device according to claim 11, characterized in that: When the drive shaft rotates, of any two connecting parts, the lower connecting part passes through the curved section before the upper connecting part; or, when the drive shaft rotates, of any two connecting parts, the upper connecting part passes through the curved section before the lower connecting part.

14. The furnace high temperature flue gas utilization device according to claim 11, characterized in that: The connecting member is provided with a contact shaft, the contact shaft is rotatably connected to the connecting member, one end of the contact shaft extends into the annular groove, and the connecting member is connected to the annular groove via the contact shaft.

15. The furnace high temperature flue gas utilization device according to claim 11, characterized in that: Each layer of the cache mechanism includes two cache components. The two cache components in the same layer of the cache mechanism are arranged opposite to each other. The ends of the two connecting components in the same layer of the cache mechanism are located in the same annular groove, and the above-mentioned two connecting components are located on opposite sides of the driving shaft, so that at most one of the two cache components in the same layer of the cache mechanism is in the unloading state, and at most one of all the cache components is in the unloading state at the same time.

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