A waste heat staged recovery system and a staged recovery method thereof

Abstract

The present application relates to a kind of waste heat fractional recovery system and its fractional recovery method, including base, rotary disc being rotationally arranged in the base, recovery space of conveying medium, output mechanism of outputting high-temperature flue gas, lower recovery mechanism of recovering heavy substance, upper recovery mechanism of adsorbing light substance and last recovery mechanism of relatively flushing the local part of the rotary disc;Wherein, the recovery space is arranged around the inner circle and outer circle of the rotary disc and is interconnected;Lower end in the direction of rotary disc rotation is sequentially distributed the output mechanism, the lower recovery mechanism and the last recovery mechanism;Upper end in the direction of rotary disc rotation is respectively distributed the upper recovery mechanism and the last recovery mechanism.Solve the problem that the scope of conventional waste heat recovery system in prior art scheme is limited, and the flow and temperature of high-temperature flue gas increase, which makes the heat exchange efficiency greatly decrease.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery, and more particularly to a waste heat graded recovery system and a graded recovery method thereof. Background Technology

[0002] In traditional methods for recovering waste heat from high-temperature flue gas, the high-temperature flue gas first enters the settling chamber, where the flue gas velocity is significantly reduced. Large dust particles settle in the settling chamber due to gravity, while small dust particles enter the boiler evaporator for step-by-step heat exchange and cooling. After the flue gas is cooled to 300°C, it enters a multi-stage economizer for further cooling to 180°C, and then enters a bag filter for dust removal before being discharged.

[0003] Traditional waste heat recovery systems have limited scope. Due to adjustments in the production process, the flow rate and temperature of high-temperature flue gas will increase, causing severe damage to the evaporator tube walls and insufficient heat exchange in the economizer, resulting in a significant decrease in heat exchange efficiency.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a waste heat graded recovery system and its graded recovery method, so as to solve the problem that the traditional waste heat recovery system has a limited range of application and the heat exchange efficiency is greatly reduced due to the increase in the flow rate and temperature of high-temperature flue gas.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A waste heat recovery system with graded recovery; The device includes a base, a turntable rotatably disposed within the base, a recovery space for conveying a medium, an output mechanism for outputting high-temperature flue gas, a lower recovery mechanism for recovering heavy materials, an upper recovery mechanism for adsorbing light materials, and a final recovery mechanism for relatively scouring a portion of the turntable. The recovery space is arranged around and interconnected with the inner and outer rings of the turntable. The output mechanism, the lower recovery mechanism, and the final recovery mechanism are sequentially distributed along the lower end of the turntable's rotation direction. The upper recovery mechanism and the final recovery mechanism are distributed along the upper end of the turntable's rotation direction.

[0007] A further technical solution is that the turntable is distributed with recycling areas, and circulation blocks are distributed within the recycling areas; the recycling space includes an inner ring space, an outer ring space, and a connecting space; the connecting space is located between adjacent recycling areas.

[0008] A further technical solution is that the base includes a frame, a surrounding seat disposed on the frame, and a surrounding groove disposed around the turntable; wherein the surrounding groove is disposed within the surrounding seat; the outer ring of the turntable contacts the surrounding groove, and the outer ring space communicates with the surrounding groove.

[0009] A further technical solution is that the output mechanism includes an output cylinder and an output plate for opening and closing the outlet of the output cylinder; wherein the output plate is hinged to the outlet of the output cylinder.

[0010] A further technical solution is that the lower recovery mechanism includes a planar section and a conical section; wherein, a plurality of the conical sections are interconnected; the planar section is respectively connected to the conical section near the output mechanism and near the final recovery mechanism.

[0011] A further technical solution is that the upper recycling mechanism includes a first recycling cylinder, a second recycling cylinder, and an exhaust device; wherein, the first recycling cylinder is connected to the exhaust device, and the second recycling cylinder is connected to the dust removal device; the first recycling cylinder is connected in parallel to the side with the longer distance between the output mechanism and the final recycling mechanism, and the second recycling cylinder is connected to the side with the shorter distance between the output mechanism and the final recycling mechanism.

[0012] A further technical solution is that the final recycling mechanism includes an air blowing rod, an adsorption tank for adsorbing dust, and a recycling tank for recovering dust, all arranged opposite each other; wherein, the blowing end of the air blowing rod faces the flow block; the adsorption tank is arranged relative to the lower air blowing rod, and the recycling tank is arranged relative to the upper air blowing rod; the adsorption tank is connected to the second recycling cylinder.

[0013] A method for graded recovery of waste heat in a graded recovery system includes the following steps: Start-up steps: The turntable starts rotating along the base, and the recycling area passes through the output mechanism, lower recycling mechanism, upper recycling mechanism and final recycling mechanism in sequence; the medium flows sequentially along the inner ring space, connecting space, outer ring space and surrounding groove; the medium in the inner ring space cools the center of the turntable, and the medium in the connecting space cools the flow block; Primary heat recovery steps: The output plate opens the outlet of the output cylinder, and the high-temperature flue gas enters the flow block. The high-temperature flue gas slows down and prolongs the heat exchange time when it comes into contact with the flow block. Layering steps: The turntable continues to rotate and enters the upper recovery mechanism. The recovery area moves from the planar section to the cone section. The exhaust device is activated to adsorb light substances in the flue gas, which accumulate above the recovery area, while heavy substances in the flue gas fall into the cone section for recovery. Secondary heat recovery steps: The blowing rod blows air into the flow block from the opposite direction, causing the substances attached to the flow block to fall off, and the gas passes through the flow block to cool the substances; the heavy substances fall into the recovery tank, and the light substances are adsorbed by the adsorption tank and enter the second recovery cylinder; the turntable continues to rotate, and the recovery area enters the upper recovery mechanism, where the second recovery cylinder adsorbs the light substances.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) The output mechanism outputs high-temperature flue gas from below into the turntable. The turntable rotates and drives the high-temperature flue gas to move between the upper recovery mechanism and the lower recovery mechanism. The light and heavy substances in the high-temperature flue gas have different masses and gradually form stratification. The upper recovery mechanism forms a certain adsorption force, the light substances are adsorbed upwards, and the heavy substances enter the lower recovery mechanism. The heat of the high-temperature flue gas is transferred to the turntable and the medium in the recovery space for heat exchange, completing the first-stage heat recovery of the high-temperature flue gas. The turntable continues to rotate and drives the flue gas into the final recovery mechanism. The final recovery mechanism sprays gas into the turntable for flushing, stripping the substances in the turntable and performing the second-stage heat recovery of the flue gas. The recovered light substances enter the dust removal device for dust removal. When the flow rate or temperature data of the high-temperature flue gas exceeds the limit, Beyond the basic data range, increase the jet volume of the final recovery mechanism; the more jets from the final recovery mechanism, the more heat can be removed during the secondary heat recovery process; as the high-temperature flue gas temperature continues to increase, increase the flow rate of the medium introduced into the recovery space based on the previous method; by increasing the flow velocity of the medium in the recovery space, the efficiency of heat exchange within the rotary table is improved, thus addressing changes in high-temperature flue gas flow or temperature data during the primary heat recovery process; as the high-temperature flue gas flow rate continues to increase, reduce the rotary table speed and increase the flow rate of the medium introduced into the recovery space based on the previous method; by reducing the rotary table speed, more high-temperature flue gas can be introduced into the rotary table, and by increasing the flow velocity of the medium within the recovery space, the efficiency of heat exchange within the rotary table is improved, thus addressing changes in high-temperature flue gas flow or temperature data during the primary heat recovery process.

[0015] (2) The spring pushes the slot plate to form an elastic force on the edge of the area, so that the edge of the area can continuously stick to the base to isolate the adjacent recycling area; the flue gas in each recycling area moves independently, and the edge of the area blocks the adjacent recycling area to prevent the flue gas in each recycling area from flowing to each other, so that the temperature of the flue gas in each recycling area decreases in a gradient as the heat exchange time increases in the rotation direction.

[0016] (3) The high-temperature flue gas flows in alternating directions in the flow block channel, and the high-temperature flue gas repeatedly comes into contact with the channel to transfer heat; the flow block stores the heat of the high-temperature flue gas, and the heat is discharged after being transferred to the medium in the connecting space; the light substances in the high-temperature flue gas continue to flow upward after impact due to their light weight, and the heavy substances in the high-temperature flue gas fall due to their own weight after impact due to their heavy weight, forming a separation of light and heavy substances; after the medium is introduced into the inner ring space, it absorbs the heat of the inner ring of the turntable and avoids the heat being transferred to the rotating shaft; at the same time, the heat generated by the rotation friction of the rotating shaft will be transferred to the inner ring space and carried out through the medium, thereby maintaining the stable rotation of the turntable.

[0017] (4) The height of the medium flowing in the surrounding groove is lower than the height of the outlet of the outer ring space. The medium in the outer ring space can flow smoothly and quickly into the surrounding groove and be recycled after converging. At the same time, the height of the medium flowing in the surrounding groove is also lower than the sealing position of the outlet of the surrounding groove and the outer ring space. The medium does not contact the sealing position during the flow process, reducing the possibility of medium leakage. The medium in the outer ring space flows into the surrounding groove, the weight of the surrounding groove increases, and pulls the edge of the surrounding groove downward, so that the sealing ring seals the outlet of the cone space.

[0018] (5) The blowing rod blows gas into the flow block to scrape off the substances attached to the flow block; light and heavy substances in the flue gas flow and complete stratification in the flow block, and the substances adsorb subsequent substances, affecting the flow of substances and causing blockage in the flow block. The substances can be peeled off by blowing gas from the top and bottom of the flow block through the blowing rod. Attached Figure Description

[0019] Figure 1 A top view of the waste heat grading and recovery system according to the first embodiment of the present invention is shown.

[0020] Figure 2 The diagram shows a front view of the waste heat grading and recovery system according to the first embodiment of the present invention.

[0021] Figure 3 It shows Figure 2 Enlarged structural diagram at point A in the middle.

[0022] Figure 4 It shows Figure 2 Enlarged structural diagram at point B in the middle.

[0023] Figure 5 It shows Figure 2 A magnified view of the local structure at the edge of the central region.

[0024] Figure 6 It shows Figure 5 Side view of the middle structure.

[0025] Figure 7 A top view of the partial structure of the first embodiment of the present invention is shown.

[0026] Figure 8 A schematic diagram showing the distribution of some structures after the enclosure is unfolded according to the first embodiment of the present invention is shown.

[0027] In the attached diagram, the following are labeled: 1. Base; 11. Frame; 111. Bearing seat; 112. Shaft; 12. Enclosure; 121. Crossbeam; 122. Gear; 123. Pin; 13. Enclosure groove; 131. Sealing ring; 2. Turntable; 201. Plate; 202. Conical space; 203. Protrusion; 204. Slide rail; 205. Cutout; 206. Rail groove; 207. Spring; 21. Recycling area; 211. Area edge; 212. Slide groove; 213. Groove plate; 2 2. Flow block; 3. Recycling space; 31. Inner ring space; 32. Outer ring space; 33. Connecting space; 331. Guide plate; 4. Output mechanism; 41. Output cylinder; 42. Output plate; 5. Lower recycling mechanism; 51. Planar section; 52. Conical section; 6. Upper recycling mechanism; 61. First recycling cylinder; 611. Filter plate; 62. Second recycling cylinder; 63. Exhaust device; 7. Final recycling mechanism; 71. Air blower; 72. Adsorption tank; 73. Recycling tank. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0029] Figure 1 A top view of the waste heat grading and recovery system according to the first embodiment of the present invention is shown. Figure 7 A top view of the partial structure of the first embodiment of the present invention is shown. Figure 8 A schematic diagram showing the distribution of some structures after the enclosure is unfolded according to the first embodiment of the present invention is shown.

[0030] Combination Figure 1 , Figure 7 and Figure 8 As shown, this invention discloses a waste heat staged recovery system. In the figure, the X direction represents the upper end of the main view of this invention, and the Y direction represents the right end of the main view of this invention.

[0031] The waste heat graded recovery system includes a base 1, a turntable 2 rotatably installed in the base 1, a recovery space for conveying the medium 3, an output mechanism for outputting high-temperature flue gas 4, a lower recovery mechanism for recovering heavy materials 5, an upper recovery mechanism for adsorbing light materials 6, and a final recovery mechanism that partially scours the turntable 2 7.

[0032] The recovery space 3 surrounds and connects the inner and outer rings of the turntable 2. The medium first flows through the recovery space 3 in the inner ring of the turntable 2, where it isolates the turntable 2 from heat transfer at its center. The medium then flows through the turntable 2 and into the recovery space 3 in the outer ring, where it exchanges heat with the high-temperature flue gas. Finally, the medium flows through the outer ring of the turntable 2 and flows out. During the rotation of the turntable 2, high-temperature flue gas enters the turntable 2, where the medium and flue gas undergo primary heat recovery, and light and heavy materials are separated. As the turntable 2 continues to rotate, the final recovery mechanism 7 flushes away localized materials and gases for secondary heat recovery.

[0033] The output mechanism 4, lower recovery mechanism 5, upper recovery mechanism 6, and final recovery mechanism 7 are sequentially distributed along the rotation direction of turntable 2. Output mechanism 4 and lower recovery mechanism 5 are located below turntable 2, upper recovery mechanism 6 is located above turntable 2, and final recovery mechanism 7 is positioned relatively vertically above turntable 2. Turntable 2 can rotate either clockwise or counterclockwise, and the output mechanism 4, lower recovery mechanism 5, upper recovery mechanism 6, and final recovery mechanism 7 are adjusted and distributed along different rotation directions. For example, in this application, turntable 2 rotates counterclockwise.

[0034] Output mechanism 4 outputs high-temperature flue gas from below into rotary table 2. Rotation of rotary table 2 causes the high-temperature flue gas to move between upper recovery mechanism 6 and lower recovery mechanism 5. Due to the difference in mass between light and heavy substances in the high-temperature flue gas, stratification gradually occurs. Upper recovery mechanism 6 exerts a certain adsorption force from above, causing light substances to be adsorbed upwards, while heavy substances descend into lower recovery mechanism 5 due to their own weight. The heat from the high-temperature flue gas is transferred to the medium within rotary table 2 and recovery space 3 for heat exchange, completing the first-stage heat recovery of the high-temperature flue gas. Rotary table 2 continues to rotate, causing the flue gas to enter the final recovery mechanism 7. The final recovery mechanism 7 sprays gas into rotary table 2 to flush it, stripping away the substances within rotary table 2 and performing secondary heat recovery of the flue gas. The final recovery mechanism 7 directly recovers heavy substances, and recovers light substances through upper recovery mechanism 6. The recovered light substances then enter a dust removal device for dust removal.

[0035] The waste heat classification and recovery system is used to recover heat from high-temperature flue gas, which originates from smelting furnaces or preheated scrap steel. Depending on adjustments in the production process, the flow rate and temperature of the high-temperature flue gas vary. The waste heat classification and recovery system is configured with a base rotation speed of the turntable 2, a flow rate of the medium introduced into the recovery space 3, and an air jet volume of the final recovery mechanism 7, corresponding to the base flow rate and temperature of the high-temperature flue gas.

[0036] When the flow rate or temperature of the high-temperature flue gas exceeds the baseline range, the jet volume of the final recovery mechanism 7 is increased. The more jets emitted by the final recovery mechanism 7, the more heat can be removed during the secondary heat recovery process.

[0037] As the temperature of the high-temperature flue gas continues to increase, the flow rate of the medium introduced into the recovery space 3 is increased based on the previous rate. By increasing the flow rate of the medium in the recovery space 3, the efficiency of heat exchange within the rotary table 2 is improved, thus addressing changes in the flow rate or temperature of the high-temperature flue gas during the primary heat recovery process.

[0038] As the high-temperature flue gas flow rate continues to increase, the rotation speed of rotary table 2 is reduced while the flow rate of the medium introduced into the recovery space 3 is increased. By reducing the rotation speed of rotary table 2, more high-temperature flue gas can be introduced into it. By increasing the flow rate of the medium in the recovery space 3, the efficiency of heat exchange within rotary table 2 is improved, thus addressing changes in the high-temperature flue gas flow rate or temperature during the primary heat recovery process.

[0039] The final recovery mechanism 7 only needs to adjust the gas flow rate to improve waste heat recovery. The recovery space 3 has a larger flow of medium, requiring a greater amount of medium to improve waste heat recovery. While the rotary table 2's deceleration increases the power consumption of the drive, it significantly increases the processing capacity of high-temperature flue gas. By classifying and processing changes in high-temperature flue gas flow rate or temperature data, adjustments can be made to the jet flow rate of the final recovery mechanism 7, the medium flow rate in the recovery space 3, and the rotation speed of the rotary table 2.

[0040] Figure 2 A front view schematic diagram of the waste heat staged recovery system according to the first embodiment of the present invention is shown. (Combined with...) Figure 1 and Figure 2 As shown, the turntable 2 has a recycling area 21, and a flow block 22 is distributed within the recycling area 21. For example, the recycling area 21 is fan-shaped. In this application, there are twelve groups of recycling areas 21; however, other numbers of groups of recycling areas 21 may be used, provided that the requirements of this application are met. Area edges 211 are formed on the edges of the upper surface, the outer ring surface, and the lower surface of the recycling area 21, and these area edges 211 contact the base 1 to separate the recycling areas 21.

[0041] Figure 5 It shows Figure 2 A magnified view of the local structure at the edge of the central region. Figure 6 It shows Figure 5 Side view of the mid-section structure. Combined with... Figure 2 , Figure 5 and Figure 6 As shown, a protrusion 203 is formed between adjacent recycling areas 21 on the turntable 2. Several area edges 211 are slidably arranged on the protrusion 203. The adjacent area edges 211 overlap and fit together to separate the adjacent recycling areas 21.

[0042] A slide rail 204 is inclinedly provided on the protrusion 203, and a groove 212 is formed on the edge 211 of the area, into which the slide rail 204 is embedded. To prevent the edge 211 of the area from detaching from the protrusion 203, cutouts 205 are formed on the upper and lower sides of the slide rail 204. The groove 212 matches the shape of the cutouts 205, so that when the slide rail 204 is embedded in the groove 212, the groove 212 holds the slide rail 204 in place.

[0043] A rail groove 206 is formed on the inclined slide rail 204, and a spring 207 is installed in the rail groove 206. A groove plate 213 is formed in the slide groove 212. When the slide rail 204 is inserted into the slide groove 212, the groove plate 213 is inserted into the rail groove 206, one end of the spring 207 abuts against the rail groove 206, and the other end of the spring 207 abuts against the groove plate 213.

[0044] The area edge 211 is located on the upper and lower sides of the turntable 2. In order to ensure the relative independence of the recycling area 21, the area edge 211 contacts the base 1. When the turntable 2 rotates, it vibrates, increasing the wear of the area edge 211. The spring 207 exerts an elastic force on the area edge 211 by pushing the slot plate 213, so that the area edge 211 can continuously adhere to the base 1 to isolate adjacent recycling areas 21.

[0045] The flue gas in each recovery zone 21 operates independently, and the zone edge 211 blocks adjacent recovery zones 21 to prevent the flue gas in each recovery zone 21 from flowing to each other. This results in the flue gas temperature in each recovery zone 21 decreasing in a gradient as the heat exchange time increases in the rotation direction.

[0046] Combination Figure 1 and Figure 2 As shown, the recycling space 3 includes an inner ring space 31, an outer ring space 32, and a connecting space 33. The connecting space 33 is located between adjacent recycling areas 21. The end of the connecting space 33 near the inner ring space 31 connects to the upper end of the inner ring space 31, and the end of the connecting space 33 near the outer ring space 32 connects to the lower end of the outer ring space 32. A guide plate 331 is installed within the connecting space 33. Multiple sets of guide plates 331 are stacked at intervals, and the guide plates 331 are arranged alternately. The medium flows along the guide plates 331, extending the heat exchange time between the medium and the high-temperature flue gas. In this application, the medium first enters the inner ring space 31 and stores a certain amount, then enters the connecting space 33 and flows along the guide plates 331, and then flows out of the connecting space 33 and merges at the lower end of the outer ring space 32 before being discharged.

[0047] The flow block 22 contacts the connecting space 33. The flow block 22 has a hollow structure, and its interior is inclined to form several channels for the flow of high-temperature flue gas. Several flow blocks 22 are staggered and superimposed in the vertical direction, and the channels of the flow blocks 22 are interconnected in the vertical direction. The channels of adjacent flow blocks 22 are inclined in opposite directions in the vertical direction, so that the high-temperature flue gas flows alternately in the channels of the flow blocks 22, and the high-temperature flue gas can repeatedly contact the channels to transfer heat. The high-temperature flue gas enters the channels of the flow block 22 from below, and the flow block 22 stores the heat of the high-temperature flue gas. The heat is transferred to the medium of the connecting space 33 and then discharged.

[0048] Because of the inclined channel, the high-temperature flue gas repeatedly impacts the inner surface of the channel as it flows from bottom to top. Lighter substances in the high-temperature flue gas continue to flow upward after impact due to their light weight, while heavier substances fall downward due to their own weight after impact, resulting in the separation of light and heavy substances.

[0049] Combination Figure 2 As shown, the base 1 includes a frame 11, a surrounding seat 12 mounted on the frame 11, and a surrounding groove 13 surrounding the turntable 2. A bearing seat 111 is installed at the center of the frame 11, and a rotating shaft 112 is rotatably mounted within the bearing seat 111, with the rotating shaft 112 positioned along the central axis of the turntable 2. A crossbeam 121 is mounted at the upper end of the surrounding seat 12, and the upper end of the rotating shaft 112 is rotatably connected to the crossbeam 121, enabling the rotating shaft 112 to drive the turntable 2 to rotate stably.

[0050] High-temperature flue gas is introduced into the turntable 2, first entering the inner ring space 31. The heat from the high-temperature flue gas in the inner ring space 31 is transferred to the rotating shaft 112. According to the principle of thermal expansion and contraction, the rotating shaft 112, after being heated, experiences increased rotational wear between the rotating shaft 112, the crossbeam 121, and the bearing housing 111. Since the inner ring space 31 surrounds the inner ring of the turntable 2, the medium introduced into the inner ring space 31 absorbs the heat from the inner ring of the turntable 2, preventing heat transfer to the rotating shaft 112. At the same time, the heat generated by the rotational friction of the rotating shaft 112 is transferred to the inner ring space 31 and carried out through the medium, thereby maintaining the stable rotation of the turntable 2.

[0051] Figure 3 It shows Figure 2 A magnified structural diagram at point A. (Combined with...) Figure 2 and Figure 3 As shown, a gear 122 is rotatably mounted on the base 12, and a pin 123 is arranged parallel to the turntable 2. The gear 122 meshes with the pin 123, and the gear 122 drives the turntable 2 to rotate via a motor and pin-tooth transmission. The turntable 2 is large and heavy. Compared to directly driving the shaft 112 to rotate the turntable 2, this application reduces the torsional torque of the shaft 112 by applying torque to the outer ring of the turntable 2. Simultaneously, the smooth surface of the pin 123 prevents dust from entering between the pins 123, avoiding dust jamming and thus maintaining the stable rotation of the turntable 2.

[0052] Figure 4 It shows Figure 2 A magnified structural diagram at point B. (Combined with...) Figure 2 and Figure 4 As shown, the surrounding groove 13 is disposed within the surrounding base 12, and the outer ring of the turntable 2 contacts the surrounding groove 13. The outer ring space 32 communicates with the surrounding groove 13. The opening of the surrounding groove 13 extends upward, so that the height of the medium flowing in the surrounding groove 13 is lower than the height of the outlet of the outer ring space 32. The medium in the outer ring space 32 can flow smoothly and quickly into the surrounding groove 13, and the medium is recovered after converging in the surrounding groove 13. At the same time, the height of the medium flowing in the surrounding groove 13 is also lower than the sealing position of the outlet of the surrounding groove 13 and the outer ring space 32, so that the medium does not contact the sealing position during the flow process, reducing the possibility of medium leakage.

[0053] A disc plate 201 is arranged around the lower end of the turntable 2, with the disc plates 201 spaced vertically and inclined downwards. The disc plates 201 are located on the upper and lower sides of the outlet of the outer ring space 32. The disc plates 201 form a conical space 202. A sealing ring 131 is provided on the edge of the surrounding groove 13. The edge of the surrounding groove 13 is inserted into the conical space 202, so that the sealing ring 131 is placed inside the conical space 202. As the opening of the conical space 202 gradually narrows, the sealing ring 131 blocks the outlet of the conical space 202. The medium in the outer ring space 32 flows into the surrounding groove 13, increasing the weight of the surrounding groove 13 and pulling the edge of the surrounding groove 13 downwards. The surrounding groove 13 pulls the sealing ring 131 outwards. As the opening of the conical space 202 gradually narrows, the sealing ring 131 blocks and seals the outlet of the conical space 202.

[0054] Combination Figure 7 and Figure 8 As shown, the output mechanism 4 includes an output cylinder 41 and an output plate 42 for opening and closing the outlet of the output cylinder 41. Multiple sets of output plates 42 are hinged to the outlet of the output cylinder 41. A sprocket is installed at the hinge position of the output plate 42, and a chain is wound on the sprocket. The output plates 42 are driven by a motor, and adjacent sets of output plates 42 can be opened and closed simultaneously through chain transmission.

[0055] The output cylinder 41 outputs high-temperature flue gas upwards. The high-temperature flue gas enters the inclined channel inside the flow block 22. The high-temperature flue gas comes into contact with the flow block 22 multiple times. The flow velocity of light substances in the high-temperature flue gas is higher than that of heavy substances, which causes the light and heavy substances in the high-temperature flue gas to be initially separated.

[0056] Combination Figure 7 and Figure 8 As shown, the lower recovery mechanism 5 includes a planar section 51 and a conical section 52. Several conical sections 52 are interconnected, and the planar sections 51 are connected to the conical sections 52 near the output mechanism 4 and near the final recovery mechanism 7. A collection cylinder is installed at the lower end of the conical section 52 via a valve, allowing heavy materials in the high-temperature flue gas to fall into the conical section 52 for collection due to their own weight.

[0057] By connecting the area edge 211 to the plane segment 51, the recovery area 21 cannot be connected to the output mechanism 4 and the lower recovery mechanism 5 at the same time, nor can the recovery area 21 be connected to the lower recovery mechanism 5 and the final recovery mechanism 7 at the same time. This prevents high-temperature flue gas from flowing between the output mechanism 4, the lower recovery mechanism 5 and the final recovery mechanism 7, and ensures that the output mechanism 4, the lower recovery mechanism 5 and the final recovery mechanism 7 work independently.

[0058] Combination Figure 7 and Figure 8 As shown, the upper recovery mechanism 6 includes a first recovery cylinder 61, a second recovery cylinder 62, and an exhaust device 63. The first recovery cylinders 61 are spaced apart and connected side-by-side on the side with the longer distance between the output mechanism 4 and the final recovery mechanism 7. The upper end of the first recovery cylinder 61 is connected to the exhaust device 63, which creates a negative pressure that causes light substances in the high-temperature flue gas to rise and stratify with the heavier substances in the high-temperature flue gas. A filter plate 611 is also installed at the upper end of the first recovery cylinder 61. The negative pressure generated by the exhaust device 63 adsorbs light substances, which must pass through the filter plate 611 before being discharged through the exhaust device 63.

[0059] Because the first collection cylinders 61 are arranged side-by-side at intervals, the negative pressure generated by the exhaust device 63 acts on the high-temperature flue gas, resulting in a clear separation between light and heavy materials. After the exhaust device 63 acts on the high-temperature flue gas, the light materials and some heavy materials rise. As the turntable 2 rotates, the exhaust device 63 no longer acts on the high-temperature flue gas, and the light materials float and gradually descend, while some heavy materials fall due to their own weight. After repeating this process multiple times, the separation between light and heavy materials becomes clear. At the same time, the exhaust device 63 does not continuously adsorb light materials, thereby controlling the suspension height of the light materials and ensuring that they pass through the second collection cylinder 62 into the dust removal device, reducing the amount of light materials passing through the filter plate 611.

[0060] The second recovery cylinder 62 is connected to the side with the shorter distance between the output mechanism 4 and the final recovery mechanism 7, and is connected to a dust removal device. For example, the dust removal device is a bag filter. After the flue gas undergoes secondary cooling through the final recovery mechanism 7, the light substances in the flue gas enter the dust removal device, completing the recovery of the light substances from the flue gas.

[0061] Combination Figure 7 and Figure 8As shown, the final recovery mechanism 7 includes an air blowing rod 71, an adsorption tank 72 for adsorbing dust, and a recovery tank 73 for recovering dust, all arranged opposite each other. The air blowing rod 71 has its blowing end facing the flow block 22, and blows gas into the flow block 22 to scrape off the substances adhering to it. Light and heavy substances in the flue gas flow and stratify within the flow block 22. Substances adhere to the inner wall of the flow block 22, adsorbing subsequent substances, affecting their flow and causing blockages. The gas blown out from the top and bottom of the flow block 22 by the air blowing rod 71 can peel off and remove these substances.

[0062] Along the rotation direction of the turntable 2, there are three sets of air-blowing rods 71. The air-blowing rods 71 ​​continuously blow gas. The first set of air-blowing rods 71 ​​is located at the upper end of the turntable 2, with its air outlet vertically facing the upper end of the turntable 2. The air-blowing pressure of the second set of air-blowing rods 71 ​​is less than that of the first and third sets. The second set of air-blowing rods 71 ​​is located at the lower end of the turntable 2, with its air outlet inclined towards the direction the turntable 2 moves in. The third set of air-blowing rods 71 ​​is located at the lower end of the turntable 2, with its air outlet inclined towards the direction the turntable 2 moves out. The recovery tank 73 is located below, relative to the first set of air-blowing rods 71. The adsorption tank 72 is located above, relative to the third set of air-blowing rods 71, and is connected to the second recovery cylinder 62.

[0063] The first and second sets of air blowing rods 71 ​​blow out gas, which flows downward through the flow block 22, blowing off the material above the flow block 22. The gas carries heat and material within the flow block 22 through the air outlet of the second set of air blowing rods 71. The second set of air blowing rods 71 ​​blows up the lighter material and blocks the heat, while the heavier material falls into the recovery tank 73, completing the recovery of the heavy material and cooling of the flow block 22. The turntable 2 continues to rotate, causing the flow block 22 to cool down and move closer to the third set of air blowing rods 71. The third set of air blowing rods 71 ​​blows out gas, which flows upward through the flow block 22, blowing up the material below the flow block 22. The lighter material continues to float upward into the adsorption tank 72 and then into the second recovery cylinder 62 for dust removal and recovery, while the heavier material falls into the recovery tank 73.

[0064] The substances adhering to the turntable 2 are cleaned, and the turntable 2 enters the upper recovery mechanism 6 in a cleaned state. The second recovery cylinder 62 adsorbs light substances and residual light substances, while the cone section 52 recovers residual heavy substances. After the turntable 2 is cleaned, it re-enters the output mechanism 4, allowing the high-temperature flue gas to directly contact the flow block 22 to complete heat exchange.

[0065] Second embodiment: The graded recovery method of the waste heat graded recovery system includes the following steps: Start-up steps: The motor drives the turntable 2 to rotate along the base 1 via pin gear transmission. The recovery area 21 passes through the output mechanism 4, the lower recovery mechanism 5, the upper recovery mechanism 6 and the final recovery mechanism 7 in sequence, and high-temperature flue gas is introduced to perform primary heat recovery, light and heavy material stratification, material stripping and secondary heat recovery.

[0066] Set the base rotation speed of turntable 2, the flow rate of the medium introduced into the recovery space 3, and the jet volume of the final recovery mechanism 7, corresponding to the flow rate and temperature of the high-temperature flue gas base.

[0067] The medium enters the inner ring space 31 for storage in a fixed quantity. The medium then enters the connecting space 33 and flows back and forth along the guide plate 331 before entering the outer ring space 32. Finally, the medium enters the surrounding trough 13 and is discharged after merging.

[0068] The medium is stored in the inner ring space 31 before entering the connecting space 33. The medium in the inner ring space 31 blocks the heat transfer between the turntable 2 and the rotating shaft 112, and cools the rotating shaft 112 at the same time.

[0069] Primary heat recovery steps: The output plate 42 opens the outlet of the output cylinder 41. Due to the inclined channel formed inside the flow block 22, the high-temperature flue gas enters the flow block 22. The high-temperature flue gas slows down and prolongs the heat exchange time upon contact with the flow block 22, and the light and heavy substances in the high-temperature flue gas are initially separated. The medium in the connecting space 33 and the high-temperature flue gas in the flow block 22 exchange heat to complete the primary heat recovery.

[0070] Layering steps: Turntable 2 continues to rotate, entering the upper recovery mechanism 6. Recovery area 21 moves from the planar section 51 to the conical section 52. Recovery area 21 alternately approaches and moves away from exhaust device 63. When flue gas approaches exhaust device 63, exhaust device 63 activates to adsorb light substances and some heavy substances in the flue gas. When flue gas leaves exhaust device 63, the adsorption force of exhaust device 63 can no longer act on the flue gas, and light substances continue to float while some heavy substances fall. After repeated alternations of approaching and moving away from exhaust device 63, light substances accumulate above recovery area 21, while heavy substances fall into conical section 52 for recovery.

[0071] Secondary heat recovery steps: The second set of air blowing rods 71 ​​blows air from above onto the flow block 22. The material attached to the upper end of the flow block 22 falls off and passes through the air blowing port of the first set of air blowing rods 71. Lighter materials float to the top, while heavier materials fall into the recovery tank 73. The third set of air blowing rods 71 ​​blows air from below onto the flow block 22. The material attached to the lower end of the flow block 22 falls off. Lighter materials float to the top and are adsorbed into the second recovery cylinder 62 through the adsorption tank 72, while heavier materials fall into the recovery tank 73.

[0072] Within the connecting space 33, the medium and the flow block 22 exchange heat for secondary heat recovery. During the blowing process by the air blower 71, the gas acts on the material, and the gas cools the material as it passes through the flow block 22. The adsorption tank 72 adsorbs the light material and it enters the second recovery cylinder 62. The turntable 2 continues to rotate, and the recovery area 21 enters the upper recovery mechanism 6. The medium and the flow block 22 within the connecting space 33 continue to exchange heat, and the second recovery cylinder 62 adsorbs the remaining light material. The gas and light material passing through the second recovery cylinder 62 have a lower temperature, which allows for baghouse dust collection.

[0073] If the high-temperature flue gas flow rate or temperature increases based on the basic data, the response should be to increase the jet volume of the final recovery mechanism 7 to remove more heat during the secondary heat recovery process.

[0074] If the temperature of the high-temperature flue gas continues to increase, the flow rate of the medium introduced into the recovery space 3 will be increased in addition to increasing the jet volume of the final recovery mechanism 7, so as to improve the efficiency of heat exchange in the rotary table 2, complete the removal of more heat in the first-stage heat recovery process, and reduce the load of single-stage heat recovery.

[0075] If the high-temperature flue gas flow rate continues to increase, the rotation speed of the turntable 2 is reduced and the flow rate of the medium introduced into the recovery space 3 is increased, based on increasing the jet volume of the final recovery mechanism 7. This allows more high-temperature flue gas to be introduced into the turntable 2. The heat exchange efficiency within the turntable 2 is improved by increasing the flow rate of the medium in the recovery space 3. This is how the changes in the high-temperature flue gas flow rate or temperature data are addressed during the primary heat recovery process.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A waste heat staged recovery system, characterized in that, The device includes a base (1), a turntable (2) rotatably disposed within the base (1), a recovery space (3) for conveying the medium, an output mechanism (4) for outputting high-temperature flue gas, a lower recovery mechanism (5) for recovering heavy materials, an upper recovery mechanism (6) for adsorbing light materials, and a final recovery mechanism (7) for relatively scouring a portion of the turntable (2); wherein the recovery space (3) is arranged around the inner and outer rings of the turntable (2) and is interconnected; the output mechanism (4), the lower recovery mechanism (5), and the final recovery mechanism (7) are sequentially distributed at the lower end along the rotation direction of the turntable (2); the upper recovery mechanism (6) and the final recovery mechanism (7) are respectively distributed at the upper end along the rotation direction of the turntable (2).

2. The waste heat staged recovery system as described in claim 1, characterized in that, The turntable (2) is distributed with recycling areas (21), and circulation blocks (22) are distributed within the recycling areas (21); the recycling space (3) includes an inner ring space (31), an outer ring space (32) and a connecting space (33); the connecting space (33) is located between adjacent recycling areas (21).

3. The waste heat staged recovery system as described in claim 2, characterized in that, The base (1) includes a frame (11), a surrounding seat (12) disposed on the frame (11), and a surrounding groove (13) disposed around the turntable (2); wherein the surrounding groove (13) is disposed inside the surrounding seat (12); the outer ring of the turntable (2) contacts the surrounding groove (13), and the outer ring space (32) communicates with the surrounding groove (13).

4. The waste heat staged recovery system as described in claim 2, characterized in that, The output mechanism (4) includes an output cylinder (41) and an output plate (42) for opening and closing the outlet of the output cylinder (41); wherein the output plate (42) is hinged to the outlet of the output cylinder (41).

5. The waste heat staged recovery system as described in claim 2, characterized in that, The lower recovery mechanism (5) includes a planar section (51) and a conical section (52); wherein, a plurality of the conical sections (52) are interconnected; the planar section (51) is respectively connected to the conical section (52) near the output mechanism (4) and near the final recovery mechanism (7).

6. The waste heat staged recovery system as described in claim 2, characterized in that, The upper recycling mechanism (6) includes a first recycling cylinder (61), a second recycling cylinder (62), and an exhaust device (63); wherein the first recycling cylinder (61) is connected to the exhaust device (63), and the second recycling cylinder (62) is connected to the dust removal device; the first recycling cylinder (61) is connected in parallel to the side with the longer distance between the output mechanism (4) and the final recycling mechanism (7), and the second recycling cylinder (62) is connected to the side with the shorter distance between the output mechanism (4) and the final recycling mechanism (7).

7. The waste heat staged recovery system as described in claim 6, characterized in that, The final recovery mechanism (7) includes an air blowing rod (71) arranged opposite to each other, an adsorption tank (72) for adsorbing dust, and a recovery tank (73) for recovering dust; wherein, the air blowing end of the air blowing rod (71) faces the flow block (22); the adsorption tank (72) is arranged relative to the lower air blowing rod (71), and the recovery tank (73) is arranged relative to the upper air blowing rod (71); the adsorption tank (72) is connected to the second recovery cylinder (62).

8. A method for graded recovery of waste heat in a graded waste heat recovery system, characterized in that, Includes the following steps: Start-up steps: The turntable (2) starts to rotate along the base (1), and the recycling area (21) passes through the output mechanism (4), the lower recycling mechanism (5), the upper recycling mechanism (6) and the final recycling mechanism (7) in sequence; the medium flows along the inner ring space (31), the connecting space (33), the outer ring space (32) and the surrounding groove (13) in sequence; the medium in the inner ring space (31) cools the center of the turntable (2), and the medium in the connecting space (33) cools the flow block (22); First-stage heat recovery steps: The output plate (42) opens the outlet of the output cylinder (41), and the high-temperature flue gas enters the flow block (22). The high-temperature flue gas slows down and prolongs the heat exchange time when it comes into contact with the flow block (22). Layering steps: The turntable (2) continues to rotate and enters the upper recycling mechanism (6). The recycling area (21) moves from the planar section (51) to the cone section (52). The exhaust device (63) is activated to adsorb light substances in the flue gas and accumulate them above the recycling area (21). The heavy substances in the flue gas fall to the cone section (52) for recycling. Secondary heat recovery steps: The blowing rod (71) blows air into the flow block (22) from the opposite direction. The substances attached to the flow block (22) fall off, and the gas passes through the flow block (22) to cool the substances. The heavy substances fall into the recovery tank (73), and the light substances are adsorbed by the adsorption tank (72) and enter the second recovery cylinder (62). The turntable (2) continues to rotate, and the recovery area (21) enters the upper recovery mechanism (6), and the second recovery cylinder (62) adsorbs the light substances.

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