A whole-process waste heat recovery device and waste heat recovery method for roller furnace

Abstract

The present invention belongs to the technical field of waste heat recovery, and discloses a full-process waste heat recovery device and waste heat recovery method for roller furnaces, including a recovery cylinder, wherein the top and bottom of the recovery cylinder are respectively provided with a feed port and a discharge port, and the internal rotating sleeve of the recovery cylinder is connected with a rotating cylinder. The present invention forms a No. 2 cavity for workpiece waste heat absorption and a No. 1 cavity for flue gas waste heat absorption through a composite waste heat absorption component, and cooperates with the No. 1 cavity and the No. 2 cavity that are alternately distributed around, and automatically completes the continuous waste heat absorption of the hot workpiece during the rotation process, and automatically discharges the material after the absorption is completed, and completes the introduction of the flue gas to achieve waste heat absorption of the hot flue gas. A set of water circulation system is used to complete the whole process waste heat absorption including hot flue gas and formed hot workpieces, optimize the structural composition, reduce equipment investment and physical examination ratio, and complete the composite waste heat absorption and recovery at the same time, store the heat in the heat exchange water flow, and the comprehensive waste heat absorption effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery, and in particular relates to a whole-process waste heat recovery device and a waste heat recovery method for a roller furnace. Background Art

[0002] Roller Hearth Furnace is an industrial heat treatment equipment, usually used for heat treatment of metal, ceramics or other materials in large-scale production. Its main feature is to convey the workpieces to be processed through a series of rollers (or rollers), and these workpieces undergo a preset heating, insulation and cooling process in the high-temperature furnace. For the use of roller furnace, in order to improve the utilization rate of heat, it is usually necessary to absorb the waste heat of the formed hot workpieces and hot flue gas.

[0003] The whole process waste heat recovery device for roller furnace in the prior art usually adopts two sets of equipment during use, which respectively integrate and inhale the flue gas and cool it to absorb heat, and absorb and store the heat with cooling water. At the same time, it is also necessary to transfer and absorb heat from the discharged hot workpiece, on the one hand to dissipate heat and cool it, and on the other hand to absorb and store the heat. However, in dealing with the problem of heat absorption, the two sets of equipment deal with it separately, the space volume is large, and the control operation is frequent, which greatly reduces the use effect and convenience. It is difficult to achieve convenient and effective waste heat recovery for the whole process of the roller furnace, and the use effect is not good.

[0004] In addition, the full-process waste heat recovery device for roller furnaces in the prior art, when absorbing and treating the waste heat of hot flue gas, due to the large amount of impurities and particles in the flue gas, on the one hand, causes dirt to accumulate on the inner wall of the flue gas heat exchange pipeline, increases the wall thickness, and affects the subsequent heat exchange efficiency; on the other hand, the continuously input flue gas flows in and out quickly, the heat exchange time is short, the waste heat loss is serious, and the use effect is poor. Summary of the invention

[0005] The object of the present invention is to provide a whole-process waste heat recovery device and a waste heat recovery method for a roller furnace, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a whole-process waste heat recovery device and waste heat recovery method for a roller furnace, comprising a recovery cylinder, wherein the top and bottom of the recovery cylinder are respectively provided with a feed port and a discharge port, the interior of the recovery cylinder is rotatably sleeved with a rotating cylinder, and the two ends of the rotating cylinder are respectively provided with a liquid inlet and a liquid outlet, a composite waste heat absorption component is fixedly provided on the outer surface of the rotating cylinder, the composite waste heat absorption component rotates intermittently in the recovery cylinder, and ventilation components are provided at both ends of the recovery cylinder,

[0007] The composite waste heat absorption component includes a heat exchange frame fixedly connected to the rotating cylinder, and baffles fixedly connected to both ends of the heat exchange frame. The number of the heat exchange frames is six, and the six heat exchange frames are evenly spaced on the outer surface of the rotating cylinder. Each two adjacent groups of the six heat exchange frames form a fan-shaped chamber and form six chambers. The six chambers are divided into three No. 1 chambers and three No. 2 chambers. The No. 1 chamber and the No. 2 chamber are alternately distributed. Flue gas is introduced into the No. 1 chamber and a workpiece is put into the No. 2 chamber. Liquid is input into the interior of the heat exchange frame, and the ventilation component intermittently inputs flue gas into the No. 1 chamber.

[0008] Preferably, the outer surface of the rotating cylinder is provided with water openings, the water openings correspond one-to-one with the heat exchange frame and are connected with the heat exchange frame, and the water openings are symmetrically distributed on the left and right sides of the bottom of the heat exchange frame.

[0009] Preferably, the composite waste heat absorption component also includes an air hole, an arc-shaped magnetic plate, an arc-shaped cover and a reinforced heat exchange sleeve, the air hole is opened on the front side of the baffle, the arc-shaped magnetic plate is located in cavity No. 1 and is fixedly connected between two groups of heat exchange frames, the arc-shaped cover is located in cavity No. 1 and is magnetically fixed to the outer side surface of the arc-shaped magnetic plate, and the reinforced heat exchange sleeve is located in cavity No. 1 and is fixedly connected to the heat exchange frame.

[0010] Preferably, the outer surface of the reinforced heat exchange sleeve is an arc surface, and the reinforced heat exchange sleeve is symmetrically distributed in cavity No. 1.

[0011] Preferably, the ventilation assembly includes an annular cavity, a through hole and a cover ring, the annular cavity is opened on the end face of the recovery tube, the through hole is opened in the inner wall of the recovery tube and is connected with the annular cavity, the cover ring is fixedly sleeved in the annular cavity, and the through hole is located on the rotation path of the air hole.

[0012] Preferably, an internal cavity is provided inside the rotating cylinder, and a sealing column fixedly connected to the liquid inlet is provided on the rotating cylinder. A spray port corresponding to cavity No. 1 is provided on the outer surface of the rotating cylinder, and the spray port is communicated with the internal cavity. A reversing assembly is movably installed in the internal cavity, and the reversing assembly controls the opening and closing of the heat exchange frame and the opening and closing of the spray port.

[0013] Preferably, the reversing assembly includes a main sealing ring, an auxiliary sealing ring, a connecting rod and an electric push rod, the main sealing ring is slidably sleeved in the liquid inlet, the auxiliary sealing ring is slidably sleeved in the internal cavity, one end of the connecting rod is fixedly connected to the main sealing ring and the other end is fixedly sleeved with the auxiliary sealing ring, the auxiliary sealing ring corresponds to the spray port one by one, the main sealing ring is movably sleeved on the outer surface of the sealing column, and the electric push rod is fixedly installed inside the liquid inlet and the movable end is fixedly connected to the main sealing ring.

[0014] Preferably, a blanking cover is provided on the top of the recovery cylinder, and the blanking cover is hinged in the feed port. The blanking cover includes a fixed shaft fixed in the feed port, an arc-shaped cover plate rotatably sleeved on the fixed shaft, and a torsion spring fixedly connected between the arc-shaped cover plate and the feed port.

[0015] Preferably, the power unit includes a power motor, a gear 2 fixedly sleeved on the output shaft of the power motor, a gear 1 fixedly sleeved on the outer surface of the rotating cylinder, the gear 1 is meshingly connected with the gear 2, the power unit drives the rotating cylinder to rotate intermittently, and conductive sleeves are fixedly provided at both ends of the recovery cylinder, and the two ends of the rotating cylinder are rotatably sleeved in the conductive sleeves.

[0016] A heat recovery method for a whole-process waste heat recovery device of a roller furnace comprises the following steps:

[0017] Step 1: Direct the high-temperature product generated in the furnace into the unloading frame at the top of the recovery cylinder, and drop it into the recovery cylinder through the elastically hinged unloading cover, and then drop it into the No. 2 cavity surrounded by two sets of heat exchange frames;

[0018] Step 2: Input the external water source into the liquid inlet of the rotating drum. The water flows into each heat exchange frame through a set of water inlets and is discharged through the water inlets and liquid outlets on the other side. The heat of the workpiece in the second chamber is sucked into the flowing water through the heat exchange frame and stored and taken away;

[0019] Step 3: In addition, the high-temperature exhaust flue gas is introduced into a set of ventilation components, and then introduced into the No. 1 cavity surrounded by two adjacent sets of heat exchange frames through the ventilation components. The input high-temperature flue gas transfers heat to the internal flowing water through the heat exchange frame. After heat exchange, the flue gas is discharged through the ventilation component at the other end, completing the synchronous waste heat absorption and recovery of the flue gas and the workpiece;

[0020] Step 4: Start the power unit and drive the rotating drum to rotate, so that the composite waste heat absorption component installed on the outside of the rotating drum rotates, keeps rotating once and 60°, the No. 1 chamber is staggered with the ventilation component, the No. 1 chamber is kept sealed, and the internal flue gas performs static heat exchange. As the power unit drives the rotating drum to move once again, the No. 1 chamber is connected with the ventilation component again to input the next round of flue gas. At the same time, the workpieces in the No. 2 chamber continue to exchange heat during the intermittent rotation time. The power unit drives the rotating drum to rotate once again, and the No. 2 chamber rotates completely from the top to the bottom, and automatically releases the workpieces after waste heat absorption from the bottom. In the intermittent rotation process, the other No. 2 chambers automatically complete the accommodation and heat exchange of the next group of workpieces when they rotate to the top;

[0021] Step 5: After the waste heat absorption is completed, keep chamber No. 1 staggered from the ventilation assembly, start the reversing assembly, so that the water flow entering the rotating cylinder is introduced into the internal cavity and sprayed into chamber No. 1 through the nozzle to complete the internal flushing. As chamber No. 1 rotates to the discharge port below, open the magnetic arc cover to complete the discharge of the cleaning liquid.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention utilizes a recovery drum and a rotating drum in conjunction with a composite waste heat absorption component installed on the rotating drum. The composite waste heat absorption component forms a No. 2 chamber for absorbing waste heat from workpieces and a No. 1 chamber for absorbing waste heat from flue gas. The No. 1 chamber and the No. 2 chamber are alternately distributed around the recovery drum. The continuous waste heat absorption of the hot workpiece is automatically completed during the rotation process, and the material is automatically discharged after the absorption is completed. At the same time, the flue gas is introduced for treatment to realize waste heat absorption of the hot flue gas. A water flow circulation system is used to complete the whole process of waste heat absorption including hot flue gas and formed hot workpieces, optimize the structural composition, reduce equipment investment and physical examination ratio, and at the same time, complete the composite waste heat absorption and recovery, store the heat in the heat exchange water flow, and have a good comprehensive waste heat absorption effect.

[0024] 2. The present invention reuses the rotating drum. During the composite heat absorption treatment process, on the one hand, the effect of intermittent rotation is utilized to ultimately achieve continuous waste heat absorption of hot workpieces and automatic loading and unloading. On the other hand, the gap of chamber No. 1 used for flue gas waste heat absorption is staggered with the flue gas inlet, thereby maintaining temporary storage of flue gas in chamber No. 1, increasing the heat exchange time of flue gas in a fixed space, improving the waste heat absorption effect, and avoiding the inability of fast-flowing and discharging flue gas to completely absorb internal heat. The workpiece continuously absorbs heat during the rotating discharging process, thereby achieving intermittent sealed heat absorption of the flue gas, comprehensively improving the waste heat absorption and recovery effect, and reducing heat loss.

[0025] 3. The present invention reuses the rotatable rotating cylinder and drives the rotation switching position of the composite waste heat absorption component. After switching to the No. 1 chamber for flue gas heat exchange and staggering the ventilation component, the interior of the No. 1 chamber is maintained relatively sealed, and the reversing component is coordinated to introduce the hot water into the No. 1 chamber and flush the No. 1 chamber. By rotating the No. 1 chamber downward and aligning it with the discharge port, the flushing water is quickly released, and the flue gas heat exchange chamber is quickly cleaned to avoid the adhesion of a certain thickness of impurity particles inside and affect the heat exchange effect. The actual cleaning is simple and convenient, the cleaning effect is good, and the long-term waste heat absorption effect is effectively improved, and the heat loss is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 is a side sectional view of the present invention;

[0028] Figure 3 It is a front cross-sectional view of the present invention;

[0029] Figure 4 It is a schematic diagram of the installation of the composite waste heat absorption component and the rotating drum of the present invention;

[0030] Figure 5 is a schematic diagram of a composite waste heat absorption component of the present invention;

[0031] Figure 6 It is a schematic diagram of the connection between the rotating cylinder and the heat exchange frame of the present invention;

[0032] Figure 7 It is a cross-sectional schematic diagram of the rotating drum of the present invention;

[0033] Figure 8 is a schematic diagram of a reversing assembly of the present invention;

[0034] Fig. 9 It is a schematic diagram of the explosion of the blanking cover of the present invention;

[0035] Fig.10 It is a cross-sectional schematic diagram of the recovery cylinder of the present invention;

[0036] Fig.11 It is a schematic diagram of an explosion of the ventilation assembly of the present invention.

[0037] In the figure: 1. recovery cylinder; 2. rotating cylinder; 3. composite waste heat absorption component; 31. heat exchange frame; 32. baffle; 33. air hole; 34. arc-shaped magnetic plate; 35. arc-shaped cover; 36. reinforced heat exchange sleeve; 4. water inlet; 5. blanking cover; 6. power unit; 7. liquid inlet; 8. liquid outlet; 9. conduction sleeve; 10. gear one; 11. internal cavity; 12. spray outlet; 13. sealing column; 14. reversing component; 141. main sealing ring; 142. auxiliary sealing ring; 143. connecting rod; 144. electric push rod; 15. ventilation component; 151. ring cavity; 152. through hole; 153. cover ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figures 1 to 11As shown, the embodiment of the present invention provides a whole-process waste heat recovery device and waste heat recovery method for a roller furnace, comprising a recovery drum 1, wherein the top and bottom of the recovery drum 1 are respectively provided with a feed port and a discharge port, the inner rotation sleeve of the recovery drum 1 is connected with a rotating drum 2, and the two ends of the rotating drum 2 are respectively provided with a liquid inlet 7 and a liquid outlet 8, a composite waste heat absorption component 3 is fixedly provided on the outer surface of the rotating drum 2, and the composite waste heat absorption component 3 rotates intermittently in the recovery drum 1, and ventilation components 15 are provided at both ends of the recovery drum 1.

[0040] The composite waste heat absorption component 3 includes a heat exchange frame 31 fixedly connected to the rotating cylinder 2, and baffles 32 fixedly connected to both ends of the heat exchange frame 31. The number of heat exchange frames 31 is six, and the six heat exchange frames 31 are evenly distributed on the outer surface of the rotating cylinder 2. Each two adjacent groups of six heat exchange frames 31 form a fan-shaped chamber and form six chambers. The six chambers are divided into three No. 1 chambers and three No. 2 chambers. The No. 1 chamber and the No. 2 chamber are alternately distributed. Flue gas is introduced into the No. 1 chamber and the workpiece is put into the No. 2 chamber. Liquid is input into the interior of the heat exchange frame 31, and the ventilation component 15 intermittently inputs flue gas into the No. 1 chamber.

[0041] The outer surface of the rotating drum 2 is provided with water openings 4 , which correspond one-to-one to and are connected to the heat exchange frame 31 , and are symmetrically distributed on the left and right sides of the bottom of the heat exchange frame 31 .

[0042] One side of the water inlets 4 distributed on both sides is used to input water into the composite waste heat absorption component 3, and the other side is used for output, ensuring that the water is fully filled and flows in the composite waste heat absorption component 3 to improve the heat absorption effect.

[0043] Among them, the composite waste heat absorption component 3 also includes an air hole 33, an arc-shaped magnetic plate 34, an arc-shaped cover 35 and a reinforced heat exchange sleeve 36. The air hole 33 is opened on the front side of the baffle 32. The arc-shaped magnetic plate 34 is located in the No. 1 cavity and is fixedly connected between the two groups of heat exchange frames 31. The arc-shaped cover 35 is located in the No. 1 cavity and is magnetically fixed to the outer side surface of the arc-shaped magnetic plate 34. The reinforced heat exchange sleeve 36 is located in the No. 1 cavity and is fixedly connected to the heat exchange frame 31. The outer surface of the reinforced heat exchange sleeve 36 is a circular arc surface, and the reinforced heat exchange sleeve 36 is symmetrically distributed in the No. 1 cavity.

[0044] The air hole 33 is used to introduce flue gas, and is staggered or connected with the through hole 152 in the ventilation component 15 during the rotation of the baffle 32. When staggered, the sealing of chamber No. 1 is maintained, and when aligned and connected, the introduction and export of flue gas are realized. The arc cover 35 is convenient for quick disassembly in a magnetic manner, and is limited by the inner wall of the recovery cylinder 1 when it is not at the discharge port to avoid detachment. Specifically, it is convenient to remove from the bottom when it is located at the discharge port, ensuring that the size of the discharge port is larger than that of the arc cover 35. The heat exchange sleeve 36 is strengthened to further fill the interior of chamber No. 1, reduce the volume of the internal flue gas space, increase the proportion of water flow that can be exchanged for heat, improve the heat absorption effect, and the arc surface improves the cleaning effect.

[0045] Among them, the ventilation assembly 15 includes an annular cavity 151, a through hole 152 and a cover ring 153. The annular cavity 151 is opened on the end face of the recovery tube 1, the through hole 152 is opened in the inner wall of the recovery tube 1 and is connected with the annular cavity 151, the cover ring 153 is fixedly sleeved in the annular cavity 151, and the through hole 152 is located on the rotation path of the air hole 33.

[0046] The ventilation components 15 are located on both sides for smoke input and output respectively. The annular cavity 151 is used to distribute the smoke to ensure that multiple groups of No. 1 cavities simultaneously enter the smoke. With the large volume and large number of No. 1 cavities, sufficient smoke can be quickly stored to avoid fast entry and exit of smoke and improve the waste heat absorption effect. The two cover rings 153 are used to introduce and export smoke respectively.

[0047] The rotating cylinder 2 is provided with an internal cavity 11, the rotating cylinder 2 is provided with a sealing column 13 fixedly connected to the liquid inlet 7, the outer surface of the rotating cylinder 2 is provided with a spray port 12 corresponding to the first cavity, the spray port 12 is connected to the internal cavity 11, and a reversing assembly 14 is movably installed in the internal cavity 11. The reversing assembly 14 controls the opening and closing of the heat exchange frame 31 and the opening and closing of the spray port 12. The reversing assembly 14 includes a main sealing ring 141, an auxiliary sealing ring 142, a connecting rod 143 and an electric The main sealing ring 141 is slidably sleeved in the liquid inlet 7, the auxiliary sealing ring 142 is slidably sleeved in the internal cavity 11, one end of the connecting rod 143 is fixedly connected to the main sealing ring 141 and the other end is fixedly sleeved with the auxiliary sealing ring 142, the auxiliary sealing ring 142 corresponds to the ejection port 12 one by one, the main sealing ring 141 is movably sleeved on the outer surface of the sealing column 13, and the electric push rod 144 is fixedly installed inside the liquid inlet 7 and the movable end is fixedly connected to the main sealing ring 141.

[0048] In coordination with the internal cavity 11 and the reversing assembly 14, the water inlet 4 is sealed at the same time when the reversing assembly 14 is actuated, thereby blocking the water flow from entering the composite waste heat absorption assembly 3 and introducing the water flow into the internal cavity 11, and completing the directional ejection of the water flow, and flushing the flue gas heat exchange with the No. 1 cavity. A small hole is provided between the liquid inlet 7 and the internal cavity 11, which is used to introduce the water flow when it is opened, and is used for inserting the connecting rod 143.

[0049] Among them, a blanking cover 5 is provided on the top of the recovery cylinder 1, and the blanking cover 5 is hinged in the feed port. The blanking cover 5 includes a fixed shaft fixed in the feed port, an arc-shaped cover plate rotatably sleeved on the fixed shaft, and a torsion spring fixedly connected between the arc-shaped cover plate and the feed port.

[0050] The blanking cover 5 is elastically hinged, automatically opens when the blanking is complete, and automatically returns to its original position and closes.

[0051] Among them, the power unit 6 includes a power motor, a gear 2 fixedly sleeved on the output shaft of the power motor, a gear 10 fixedly sleeved on the outer surface of the rotating cylinder 2, and the gear 10 is meshingly connected with the gear 2. The power unit 6 drives the rotating cylinder 2 to rotate intermittently, and a conductive sleeve 9 is fixedly provided at both ends of the recovery cylinder 1. The two ends of the rotating cylinder 2 are rotatably sleeved in the conductive sleeve 9.

[0052] The power unit 6 cooperates with the gear 10 to realize the intermittent rotation control of the rotating drum 2.

[0053] Embodiment 1: The high-temperature product generated in the furnace is directly introduced into the discharge frame at the top of the recovery drum 1, and falls into the recovery drum 1 through the elastically hinged discharge cover 5, and falls into the No. 2 cavity surrounded by two groups of heat exchange frames 31. The external water source is input into the liquid inlet 7 of the rotating drum 2, and the water flows into each heat exchange frame 31 through a group of water ports 4 and is discharged through the water ports 4 and the liquid outlet 8 on the other side. The heat of the workpiece located in the No. 2 cavity is sucked into the flowing water through the heat exchange frame 31 and stored and taken away. In addition, the high-temperature exhaust flue gas is introduced into a group of ventilation components 15, and is introduced into the No. 1 cavity surrounded by two adjacent groups of heat exchange frames 31 through the ventilation components 15. The input high-temperature flue gas transfers heat to the internal flowing water through the heat exchange frame 31, and the flue gas after heat exchange is discharged through the ventilation component 15 at the other end. Out, complete the synchronous waste heat absorption and recovery of the flue gas and the workpiece, start the power unit 6 and drive the rotating cylinder 2 to rotate, so that the composite waste heat absorption component 3 installed on the outside of the rotating cylinder 2 rotates, keeps rotating once and 60°, chamber No. 1 is staggered with the ventilation component 15, chamber No. 1 remains sealed, and the internal flue gas performs static heat exchange. As the power unit 6 drives the rotating cylinder 2 to move once again, chamber No. 1 is connected with the ventilation component 15 again for the next round of flue gas input. At the same time, the workpiece in chamber No. 2 continues to exchange heat during the intermittent rotation time. The power unit 6 drives the rotating cylinder 2 to rotate again, chamber No. 2 rotates completely from top to bottom, and automatically releases the workpiece after waste heat absorption from the bottom, and during the intermittent rotation process, the other chamber No. 2 automatically completes the accommodation and heat exchange of the next group of workpieces when it rotates to the top.

[0054] Firstly, by utilizing the recovery drum 1 and the rotating drum 2, in conjunction with the composite waste heat absorption component 3 installed on the rotating drum 2, the composite waste heat absorption component 3 forms a No. 2 chamber for absorbing waste heat of the workpiece and a No. 1 chamber for absorbing waste heat of the flue gas, and cooperates with the No. 1 chamber and the No. 2 chamber that are alternately distributed around, and automatically completes the continuous waste heat absorption of the hot workpiece during the rotation process, and automatically discharges the material after the absorption is completed, and completes the introduction and treatment of the flue gas at the same time, realizes waste heat absorption of the hot flue gas, and adopts a set of water circulation system to complete the whole process waste heat absorption including hot flue gas and formed hot workpiece, optimizes the structural composition, reduces equipment investment and physical examination ratio, and completes the composite waste heat absorption recovery at the same time, stores the heat in the water exchange water flow, and has a good comprehensive waste heat absorption effect.

[0055] In addition, by reusing the rotating drum 2, during the composite heat absorption treatment process, on the one hand, the effect of intermittent rotation is utilized to ultimately achieve continuous residual heat absorption of the hot workpiece and automatic loading and unloading. On the other hand, the gap of the No. 1 chamber used for flue gas residual heat absorption is staggered with the flue gas inlet, thereby maintaining the temporary storage of flue gas in the No. 1 chamber, increasing the heat exchange time of the flue gas in a fixed space, improving the residual heat absorption effect, and avoiding the rapid entry and exit of flue gas from being unable to completely absorb the internal heat. Accompanied by the continuous heat absorption of the workpiece during the rotating discharging process, intermittent sealed heat absorption of the flue gas is achieved, which comprehensively improves the effect of residual heat absorption and recovery, and reduces heat loss.

[0056] Embodiment 2: After the waste heat absorption is completed, keep the No. 1 chamber offset from the ventilation component 15, start the reversing component 14, and the electric push rod 144 pushes the main sealing ring 141 to seal the water port 4 at the liquid inlet 7, and makes the main sealing ring 141 move out from the outside of the sealing column 13, and the auxiliary sealing ring 142 is offset from the spray port 12, the spray port 12 is opened, and after the main sealing ring 141 moves, the small hole between the internal chamber 11 and the liquid inlet 7 is opened, so that the water flow entering the rotating cylinder 2 is introduced into the internal chamber 11 through the small hole and sprayed into the No. 1 chamber through the spray port 12, completing the internal flushing of the No. 1 chamber for flue gas heat exchange, and as the No. 1 chamber rotates to the lower discharge port, the magnetic arc cover 35 is opened to complete the discharge of the cleaning liquid.

[0057] Firstly, by utilizing the rotatable rotating drum 2 again and driving the rotation switching position of the composite waste heat absorption component 3, after switching to the No. 1 chamber for flue gas heat exchange and staggering with the ventilation component 15, the interior of the No. 1 chamber is maintained relatively sealed, and the reversing component 14 is coordinated to introduce the hot water into the No. 1 chamber and flush the No. 1 chamber, and by rotating the No. 1 chamber downward to align with the discharge port, the flushing water is quickly released, and the flue gas heat exchange chamber is quickly cleaned to avoid a certain thickness of impurity particles adhering to the inside and affecting the heat exchange effect. The actual cleaning is simple and convenient, the cleaning effect is good, and the long-term waste heat absorption effect is effectively improved, and heat loss is reduced.

[0058] A heat recovery method for a whole-process waste heat recovery device of a roller furnace comprises the following steps:

[0059] Step 1: Directly guide the high-temperature product generated in the furnace into the unloading frame at the top of the recovery cylinder 1, and drop into the recovery cylinder 1 through the elastically hinged unloading cover 5, and then drop into the No. 2 cavity surrounded by the two sets of heat exchange frames 31;

[0060] Step 2: Input the external water source into the liquid inlet 7 of the rotating drum 2, and the water flows into each heat exchange frame 31 through a group of water holes 4 and is discharged through the water holes 4 and the liquid outlet 8 on the other side. The heat of the workpiece in the second chamber is sucked into the flowing water through the heat exchange frame 31 and stored and taken away;

[0061] Step 3: In addition, the high-temperature exhaust flue gas is introduced into a set of ventilation components 15, and then introduced into the No. 1 cavity surrounded by two adjacent sets of heat exchange frames 31 through the ventilation components 15. The input high-temperature flue gas transfers heat to the internal flowing water through the heat exchange frame 31. After heat exchange, the flue gas is discharged through the ventilation component 15 at the other end, completing the synchronous waste heat absorption and recovery of the flue gas and the workpiece;

[0062] Step 4: Start the power unit 6 and drive the rotating cylinder 2 to rotate, so that the composite waste heat absorption component 3 installed on the outside of the rotating cylinder 2 rotates, keeps rotating once and 60°, the No. 1 chamber is staggered with the ventilation component 15, the No. 1 chamber is kept sealed, and the internal flue gas performs static heat exchange. As the power unit 6 drives the rotating cylinder 2 to move once again, the No. 1 chamber is connected with the ventilation component 15 again to input the next round of flue gas. At the same time, the workpieces in the No. 2 chamber continue to exchange heat during the intermittent rotation time. The power unit 6 drives the rotating cylinder 2 to rotate once again, and the No. 2 chamber rotates completely from the top to the bottom, and automatically releases the workpieces after waste heat absorption from the bottom. In the intermittent rotation process, the other No. 2 chambers automatically complete the accommodation and heat exchange of the next group of workpieces when they rotate to the top;

[0063] Step 5: After the waste heat absorption is completed, keep the No. 1 chamber and the ventilation component 15 staggered, start the reversing component 14, so that the water flow entering the rotating cylinder 2 is introduced into the internal chamber 11 and sprayed into the No. 1 chamber through the spray port 12 to complete the internal flushing. As the No. 1 chamber rotates to the lower discharge port, open the magnetic arc cover 35 to complete the discharge of the cleaning liquid.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A whole-process waste heat recovery device for a roller furnace, comprising a recovery drum (1), characterized in that: The top and bottom of the recovery cylinder (1) are respectively provided with a feed inlet and a discharge port; the interior of the recovery cylinder (1) is rotatably sleeved with a rotating cylinder (2); both ends of the rotating cylinder (2) are respectively provided with a liquid inlet (7) and a liquid outlet (8); a composite waste heat absorption component (3) is fixedly provided on the outer surface of the rotating cylinder (2); the composite waste heat absorption component (3) rotates intermittently in the recovery cylinder (1); and both ends of the recovery cylinder (1) are provided with ventilation components (15); The composite waste heat absorption component (3) comprises a heat exchange frame (31) fixedly connected to the rotating cylinder (2), and baffles (32) fixedly connected to both ends of the heat exchange frame (31). The number of the heat exchange frames (31) is six, and the six heat exchange frames (31) are evenly spaced and distributed on the outer surface of the rotating cylinder (2). Each two adjacent groups of the six heat exchange frames (31) form a fan-shaped chamber and form six chambers. The six chambers are divided into three No. 1 chambers and three No. 2 chambers. The No. 1 chambers and the No. 2 chambers are alternately distributed. The No. 1 chamber is used to introduce flue gas and the No. 2 chamber is used to put in workpieces. Liquid is input into the interior of the heat exchange frame (31), and the ventilation component (15) intermittently inputs flue gas into the No. 1 chamber. The outer surface of the rotating cylinder (2) is provided with water openings (4), the water openings (4) correspond one-to-one with the heat exchange frames (31) and are connected to the heat exchange frames (31), the water openings (4) are symmetrically distributed on the left and right sides of the bottom of the heat exchange frames (31), an external water source is input into the liquid inlet (7) of the rotating cylinder (2), water flows through a group of water openings (4) to fill into each heat exchange frame (31) and is discharged through the water openings (4) on the other side and the liquid outlet (8).

2. The whole process waste heat recovery device for roller furnace according to claim 1 is characterized in that: The composite waste heat absorption component (3) further comprises an air hole (33), an arc-shaped magnetic plate (34), an arc-shaped cover (35) and a reinforced heat exchange sleeve (36); the air hole (33) is provided on the front side of the baffle (32); the arc-shaped magnetic plate (34) is located in the first cavity and is fixedly connected between the two groups of heat exchange frames (31); the arc-shaped cover (35) is located in the first cavity and is magnetically fixed to the outer side surface of the arc-shaped magnetic plate (34); and the reinforced heat exchange sleeve (36) is located in the first cavity and is fixedly connected to the heat exchange frame (31).

3. The whole process waste heat recovery device for roller furnace according to claim 2 is characterized in that: The outer surface of the enhanced heat exchange sleeve (36) is an arc surface, and the enhanced heat exchange sleeve (36) is symmetrically distributed in the first cavity.

4. The whole process waste heat recovery device for roller furnace according to claim 3 is characterized in that: The ventilation assembly (15) comprises an annular cavity (151), a through hole (152) and a cover ring (153); the annular cavity (151) is provided on the end surface of the recovery cylinder (1); the through hole (152) is provided in the inner wall of the recovery cylinder (1) and is connected to the annular cavity (151); the cover ring (153) is fixedly sleeved in the annular cavity (151); and the through hole (152) is located on the rotation path of the air hole (33).

5. The whole process waste heat recovery device for roller furnace according to claim 4 is characterized in that: The rotating cylinder (2) has an internal cavity (11) formed therein, the rotating cylinder (2) is provided with a sealing column (13) fixedly connected to the liquid inlet (7), the outer surface of the rotating cylinder (2) is provided with a spray port (12) corresponding to the first cavity, the spray port (12) is communicated with the internal cavity (11), a reversing assembly (14) is movably installed in the internal cavity (11), and the reversing assembly (14) controls the opening and closing of the heat exchange frame (31) and the opening and closing of the spray port (12).

6. The whole process waste heat recovery device for roller furnace according to claim 5 is characterized in that: The reversing assembly (14) comprises a main sealing ring (141), an auxiliary sealing ring (142), a connecting rod (143) and an electric push rod (144); the main sealing ring (141) is slidably sleeved in the liquid inlet (7); the auxiliary sealing ring (142) is slidably sleeved in the internal cavity (11); one end of the connecting rod (143) is fixedly connected to the main sealing ring (141) and the other end is fixedly sleeved with the auxiliary sealing ring (142); the auxiliary sealing ring (142) corresponds to the ejection port (12) one by one; the main sealing ring (141) is movably sleeved on the outer surface of the sealing column (13); the electric push rod (144) is fixedly installed inside the liquid inlet (7) and the movable end is fixedly connected to the main sealing ring (141).

7. The whole process waste heat recovery device for roller furnace according to claim 6 is characterized in that: A blanking cover (5) is provided on the top of the recovery cylinder (1), and the blanking cover (5) is hinged in the feed port. The blanking cover (5) comprises a fixed shaft fixed in the feed port, an arc-shaped cover plate rotatably sleeved on the fixed shaft, and a torsion spring fixedly connected between the arc-shaped cover plate and the feed port.

8. The whole process waste heat recovery device for roller furnace according to claim 7 is characterized in that: The invention comprises a power unit (6), the power unit (6) comprises a power motor, a gear 2 fixedly sleeved on the output shaft of the power motor, a gear 1 (10) fixedly sleeved on the outer surface of the rotating cylinder (2), the gear 1 (10) being meshingly connected with the gear 2, the power unit (6) drives the rotating cylinder (2) to rotate intermittently, and conductive sleeves (9) are fixedly provided at both ends of the recovery cylinder (1), and the two ends of the rotating cylinder (2) are rotatably sleeved in the conductive sleeves (9).

9. The heat recovery method for the whole process waste heat recovery device of a roller furnace according to claim 8, characterized in that: The steps include: The first step is to introduce the high-temperature product generated in the furnace directly into the discharge frame at the top of the recovery cylinder (1), and drop it into the recovery cylinder (1) through the elastically hinged discharge cover (5), and then drop it into the No. 2 cavity surrounded by the two sets of heat exchange frames (31); Step 2: Input an external water source into the liquid inlet (7) of the rotating drum (2), and the water flows into each heat exchange frame (31) through a group of water inlets (4) and is discharged through the water inlets (4) on the other side and the liquid outlet (8), and the heat of the workpiece in the second chamber is sucked into the flowing water through the heat exchange frame (31) and stored and taken away; Step 3: In addition, the high-temperature exhaust flue gas is introduced into a set of ventilation components (15), and then introduced into the No. 1 cavity surrounded by two adjacent sets of heat exchange frames (31) through the ventilation components (15). The input high-temperature flue gas transfers heat to the internal flowing water flow through the heat exchange frame (31). After the heat exchange, the flue gas is discharged through the ventilation component (15) at the other end, thereby completing the synchronous waste heat absorption and recovery of the flue gas and the workpiece; Step 4: Start the power unit (6) and drive the rotating cylinder (2) to rotate, so that the composite waste heat absorption component (3) installed on the outside of the rotating cylinder (2) rotates, keeps rotating once and at 60 degrees, the No. 1 chamber is staggered with the ventilation component (15), the No. 1 chamber is kept sealed, and the internal flue gas performs static heat exchange. As the power unit (6) drives the rotating cylinder (2) to move once again, the No. 1 chamber is connected with the ventilation component (15) again to input the next round of flue gas. At the same time, the workpieces in the No. 2 chamber continue to exchange heat during the intermittent rotation time. The power unit (6) drives the rotating cylinder (2) to rotate once again, and the No. 2 chamber rotates completely from the top to the bottom, and automatically releases the workpieces after waste heat absorption from the bottom. In the intermittent rotation process, the other No. 2 chambers automatically complete the accommodation and heat exchange of the next group of workpieces when they rotate to the top. Step 5: After the waste heat absorption is completed, the No. 1 chamber is kept staggered with the ventilation component (15), and the reversing component (14) is started, so that the water flow entering the rotating cylinder (2) is introduced into the internal chamber (11) and sprayed into the No. 1 chamber through the spray port (12) to complete the internal flushing. As the No. 1 chamber rotates to the lower discharge port, the magnetic arc cover (35) is opened to complete the discharge of the cleaning liquid.

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