Dragon kiln tail gas waste heat recovery device

Abstract

The invention relates to the technical field of tail gas treatment, and discloses a dragon kiln tail gas waste heat recovery device which is characterized in that a dragon kiln flue is designed to be Z-shaped, and a Z-shaped heat exchange plate is additionally arranged in the dragon kiln flue, so that after being sucked into a heat exchange cavity of the dragon kiln flue by a guide fan, high-temperature tail gas is influenced by a turning point of the Z-shaped heat exchange plate and is impacted and rotationally decelerated; meanwhile, in the process of guiding a fan to rotate, an eccentric block is driven to synchronously rotate, so that different point positions on the same circumference on the inclined surface of the eccentric block are in contact with a contact ball, and a spring III is matched to drive a straight moving pipe to do straight reciprocating motion, so that the straight moving pipe drives a heat exchange plate I to synchronously move; the heat exchange plate I drives the heat exchange plate II to perform inclined reciprocating motion, and the heat exchange plate II drives the heat exchange plate III to perform inclined reciprocating motion, so that cold medium turbulence in the heat exchange plates is intensified, and in the reciprocating motion process of the heat exchange plates, the contact amount between the heat exchange plates and high-temperature tail gas in unit time is increased.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment, and in particular to a dragon kiln tail gas waste heat recovery device. Background Art

[0002] The dragon kiln is shaped like a dragon or centipede, and is arranged from low to high. During the kiln firing process, the dragon kiln's exhaust duct will continuously discharge high-temperature exhaust gas. For this reason, the manufacturer has installed many exhaust gas treatment devices at the flue outlet to purify the high-temperature smoke generated in the kiln and reduce environmental pollution. However, during the exhaust gas treatment, the high heat in the exhaust gas is continuously dissipated, which will cause a huge waste of energy.

[0003] To this end, it is necessary to add a tail gas waste heat recovery device before the tail gas treatment. Most of the existing waste heat recovery devices add dense heat exchange tubes in the flue, so that the high-temperature tail gas flowing in the flue contacts the dense heat exchange tubes and exchanges heat with the cold medium in the heat exchange tubes, thereby recovering the heat in the high-temperature tail gas. However, the layout of such dense heat exchange tubes will lead to obstruction of the flow of tail gas, which can easily flow back into the dragon kiln, affecting the kiln firing effect in the dragon kiln. After reducing the number of heat exchange tubes, it is impossible to contact the tail gas over a large area, and the heat exchange efficiency will be reduced. Summary of the Invention

[0004] The present application proposes a dragon kiln tail gas waste heat recovery device, which has a Z-shaped flue design that will extend the retention time of the tail gas. The Z-shaped flue design will change the movement direction of the tail gas and make the tail gas collide with each other to increase turbulence. The reciprocating motion of the heat exchange plate increases the contact amount with the tail gas. The reciprocating motion of the heat exchange plate stirs the tail gas to increase turbulence. The reciprocating motion of the heat exchange plate will change the movement direction of the tail gas. The reciprocating motion of valve plate I and valve plate II will change the movement direction of the tail gas. The advantages are used to solve the problems of dense heat exchange tubes in existing tail gas waste heat recovery devices that cause obstruction of tail gas flow and low heat exchange efficiency due to the small number of heat exchange tubes.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: a dragon kiln exhaust gas waste heat recovery device, including a dragon kiln flue, a heat exchange chamber is opened in the dragon kiln flue, for providing heat exchange space for high-temperature exhaust gas, a motor group is arranged in the heat exchange chamber, and a guide fan is arranged at the output end of the motor group for guiding the flow direction of the high-temperature exhaust gas; a heat exchange plate, including a horizontal heat exchange plate I at the bottom, a vertical heat exchange plate II in the middle and a horizontal heat exchange plate III at the top, the heat exchange plate is sleeved in the heat exchange chamber, for large-area contact with the high-temperature exhaust gas in the heat exchange chamber for heat exchange; a reversing device, including symmetrical receiving grooves I and receiving grooves II opened in the dragon kiln flue, a valve plate I is arranged in the receiving groove I, and a valve plate II is arranged in the receiving groove II, for blocking part of the space of the heat exchange chamber and changing the flow direction of the exhaust gas.

[0006] Preferably, the cross-sections of the dragon kiln flue and the heat exchange chamber are both Z-shaped, and the heat exchange plates are Z-shaped, so as to prolong the contact time with the high-temperature exhaust gas.

[0007] Preferably, the bottom of the dragon kiln flue is connected with an input pipe, and the top of the dragon kiln flue is connected with an output pipe. The bottom of the heat exchange plate is connected to the input pipe for inputting cold medium into the heat exchange plate, and the top of the heat exchange plate is connected to the output pipe for outputting the hot medium in the heat exchange plate.

[0008] Preferably, the heat exchange portion of the heat exchange plate is composed of staggered pipes, which are used for high-temperature exhaust gas to pass through the heat exchange plate for efficient heat exchange.

[0009] Preferably, a straight tube is provided at the center of one end of the heat exchange plate I away from the heat exchange plate II, and a contact ball is provided at the end of the straight tube away from the heat exchange plate I. The cross-section of the input pipe is L-shaped, and the straight tube passes through the input pipe parallel to the horizontal plane to limit the movement direction of the straight tube. The straight tube is provided with uniformly distributed through holes, and the through holes are located in the inner cavity of the input pipe to input the cold medium in the input pipe into the heat exchange plate I.

[0010] Preferably, a connecting rod is provided at the center of one end of the guide fan away from the motor group, and an eccentric block is provided at one end of the connecting rod away from the guide fan for synchronous rotation with the guide fan.

[0011] Preferably, an inclined surface is provided at one end of the eccentric block away from the connecting rod, and the contact ball passes through the inclined surface of the input tube to the eccentric block to receive the displacement difference provided by the rotating inclined surface. A spring III is provided between the contact ball and the input tube to provide power for resetting the contact ball.

[0012] Preferably, a tee pipe I is provided at the center of one end of the heat exchange plate I close to the heat exchange plate II, and two symmetrical connecting pipes I are provided at the bottom of the heat exchange plate II, and the opposite ends of the two symmetrical connecting pipes I are respectively hinged on the two ports of the tee pipe I, so as to provide the heat exchange plate II with a tilted linear motion. Two symmetrical connecting pipes II are provided on the top of the heat exchange plate II, and a tee pipe II is provided at the center of one end of the heat exchange plate III close to the heat exchange plate II, and the opposite ends of the two symmetrical connecting pipes II are respectively hinged on the two ports of the tee pipe II, so as to provide a moving point hinge point when the heat exchange plate II and the heat exchange plate III are tilted. A ninety-degree elbow is provided at the center of the end of the heat exchange plate III away from the heat exchange plate II, and the elbow is parallel to the horizontal plane. The end of the elbow away from the heat exchange plate III is hinged to the end of the output pipe close to the heat exchange plate III, so as to provide a fixed point hinge point when the heat exchange plate III is tilted.

[0013] Preferably, two symmetrical springs I are provided between the top of the valve plate I and the bottom of the receiving groove I, for providing power for resetting the valve plate I. Two symmetrical pull ropes are provided at the top of the valve plate I, and the other ends of the pull ropes pass through the dragon kiln flue and are connected to the bottom of the heat exchange chamber. The pull ropes are located in the heat exchange chamber and pass between the staggered pipes of the heat exchange plate I, for receiving the power for the linear motion of the heat exchange plate I.

[0014] Preferably, two symmetrical springs II are provided between the bottom end of the valve plate II and the bottom of the receiving groove II, for providing power for lifting the valve plate II, the bottom of the valve plate I is sleeved with a high-temperature resistant magnet I, and the top of the valve plate II is sleeved with a high-temperature resistant magnet II, and the opposite ends of the high-temperature resistant magnet I and the high-temperature resistant magnet II repel each other, for providing power for pressing the valve plate I downward.

[0015] This application has the following beneficial effects:

[0016] The present application provides a dragon kiln exhaust gas waste heat recovery device, which designs the dragon kiln flue into a Z shape and adds a Z-shaped heat exchange plate in the dragon kiln flue. After the high-temperature exhaust gas is guided into the heat exchange chamber of the dragon kiln flue by the fan, it is affected by the turning point of the Z shape, causing collision and swirl deceleration, thereby prolonging the time in the heat exchange chamber and the contact time with the heat exchange plate, thereby improving the heat exchange effect.

[0017] At the same time, during the rotation of the guide fan, the eccentric block will be driven to rotate synchronously, so that different points on the same circumference of the inclined surface of the eccentric block will contact the contact ball, and the spring III will drive the straight tube to perform a straight reciprocating motion, so that the straight tube drives the heat exchange plate I to move synchronously, so that the heat exchange plate I drives the heat exchange plate II to perform an inclined reciprocating motion, and the heat exchange plate II drives the heat exchange plate III to perform an inclined reciprocating motion, so that the highest point and the lowest point of the heat exchange plate are in a constantly changing state, so that the flow potential energy of the cold medium in the heat exchange plate is constantly changing. In the process of constantly changing potential energy, the kinetic energy will also be constantly changing, so that the cold medium in the heat exchange plate is in an accelerated and decelerated flow state, so that the turbulence of the cold medium in the heat exchange plate is aggravated. In the reciprocating motion of the heat exchange plate, the contact amount with the high-temperature exhaust gas per unit time is increased, more direct contact heat exchange of the high-temperature exhaust gas is obtained, and the heat exchange effect is improved.

[0018] At the same time, due to the reciprocating motion of the heat exchange plate, the heat exchange plate stirs the high-temperature exhaust gas in the heat exchange cavity to improve the turbulent state of the flowing high-temperature exhaust gas, and due to the inclined reciprocating motion of the heat exchange plate II and the heat exchange plate III, the space size of different positions of the heat exchange cavity around the heat exchange plate II and the heat exchange plate III will be continuously changed, thereby guiding the high-temperature exhaust gas to flow through the heat exchange plate II and the heat exchange plate III to a larger space under the difference in space size, so that the high-temperature exhaust gas continuously flows between the heat exchange plate II and the heat exchange plate III, further improving the turbulent state and improving the efficiency of heat exchange.

[0019] At the same time, in the process of heat exchange plate I moving away from the motor group, the pull rope will be squeezed, so that the pull rope pulls the valve plate I up. At this time, the repulsive force provided by the high-temperature resistant magnet I in the valve plate I to the high-temperature resistant magnet II in the valve plate II is weakened, so that the spring II pushes the valve plate II to move up. When the heat exchange plate I moves closer to the motor group, the squeezing force on the pull rope gradually disappears, so that the pulling force of the pull rope on the valve plate I gradually disappears, so that the spring I pushes the valve plate I to move downward. At this time, the repulsive force provided by the high-temperature resistant magnet I in the valve plate I to the high-temperature resistant magnet II in the valve plate II is enhanced, pushing the valve plate II downward, so that the valve plate I and the valve plate II close the space above or below the heat exchange plate I in different states, so that the high-temperature exhaust gas can only continuously pass through the heat exchange plate I, so that the linear motion heat exchange plate I can also contact more high-temperature exhaust gas, thereby improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0021] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention;

[0023] Figure 2 Schematic diagram of the internal structure distribution of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the dragon kiln flue of the present invention;

[0025] Figure 4 This is a schematic diagram of the heat exchange plate structure of the present invention;

[0026] Figure 5 This is a structural schematic diagram of the heat exchange plate I of the present invention;

[0027] Figure 6 This is a schematic structural diagram of the heat exchange plate II of the present invention;

[0028] Figure 7 This is a schematic structural diagram of the heat exchange plate III of the present invention;

[0029] Figure 8 Schematic diagram of the exhaust gas flow direction under normal conditions of the present invention;

[0030] Figure 9 This is a schematic diagram of the exhaust gas flow direction when the heat exchange plate of the present invention is in one of the tilted states;

[0031] Figure 10 This is a schematic diagram of the exhaust gas flow direction when the heat exchange plate is in another inclined state according to the present invention.

[0032] Reference numerals:

[0033] 1. Dragon kiln flue; 2. Heat exchange chamber; 3. Motor unit; 4. Guide fan; 5. Connecting rod; 6. Eccentric block; 7. Storage tank I; 71. Storage tank II; 8. Valve plate I; 81. Valve plate II; 9. High-temperature resistant magnet I; 91. High-temperature resistant magnet II; 10. Spring I; 101. Spring II; 11. Pull rope; 12. Input pipe; 13. Heat exchange plate I; 14. Straight pipe; 15. Through hole; 16. Contact ball; 17. Spring III; 18. Tee pipe I; 19. Heat exchange plate II; 20. Connecting pipe I; 21. Connecting pipe II; 22. Heat exchange plate III; 23. Tee pipe II; 24. Elbow pipe; 25. Output pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Example 1

[0036] See also Figures 1 to 3 The exhaust fan 4 of the second stage is fixed on the upper end of the heat exchange chamber 2, and the exhaust fan 4 of the second stage is fixed on the lower end of the heat exchange chamber 2. The exhaust fan 4 of the second stage is fixed on the upper end of the heat exchange chamber 2, and the exhaust fan 4 of the second stage is fixed on the lower end of the heat exchange chamber 2.

[0037] See Figures 1 to 3A heat exchange plate is sleeved in the heat exchange chamber 2, and the heat exchange plate is Z-shaped, so that the heat exchange plate adapts to the Z-shaped structure of the heat exchange chamber 2, and can come into contact with the high-temperature flue gas flowing in the heat exchange chamber 2 to complete direct contact heat exchange. The bottom of the dragon kiln flue 1 is fixedly sleeved with an input pipe 12, and the top of the dragon kiln flue 1 is fixedly sleeved with an output pipe 25. The bottom of the heat exchange plate is connected to the input pipe 12, and the top of the heat exchange plate is connected to the output pipe 25, so that the cold medium can enter the heat exchange plate through the input pipe 12, and after heat exchange in the heat exchange chamber 2 is obtained and heated, it is discharged from the output pipe 25.

[0038] See Figures 2 to 3 The inlet pipe 12 is close to the guide fan 4, and the outlet pipe 25 is close to the smoke exhaust port of the dragon kiln, so that the flow direction of the high-temperature exhaust gas is opposite to the flow direction of the cold medium in the heat exchange plate, thereby increasing the temperature gradient and obtaining a higher heat exchange efficiency at a higher temperature difference.

[0039] Example 2

[0040] See also Figures 2 to 5 On the basis of the first embodiment, the heat exchange portion of the heat exchange plate is composed of staggered pipes, so that the high-temperature flue gas can flow between the staggered pipes, thereby improving the heat exchange effect. The heat exchange plate is composed of a horizontal heat exchange plate I 13 at the bottom, a vertical heat exchange plate II 19 in the middle, and a horizontal heat exchange plate III 22 at the top. The center of the end of the heat exchange plate I 13 away from the heat exchange plate II 19 is fixedly connected to a straight pipe 14. The end of the straight pipe 14 away from the heat exchange plate I 13 is welded with a contact ball 16. The cross section of the input pipe 12 is L-shaped, and the straight pipe 14 passes through the input. The tube 12 is parallel to the horizontal plane, so that the straight tube 14 can be limited by the input tube 12 when performing linear reciprocating motion and can only perform horizontal motion. The straight tube 14 is provided with evenly distributed through holes 15, and the through holes 15 are located in the inner cavity of the input tube 12, so that the cold medium entering the input tube 12 can enter the straight tube 14 through the through holes 15 and then be input into the heat exchange plate I 13. Moreover, when the straight tube 14 performs linear reciprocating motion, the through holes 15 are still in the input tube 12 to transport the cold medium.

[0041] See Figures 2 to 5 , Figures 8 to 10The center of one end of the guide fan 4 away from the motor group 3 is fixedly connected with a connecting rod 5, and the end of the connecting rod 5 away from the guide fan 4 is fixedly connected with an eccentric block 6. The end of the eccentric block 6 away from the connecting rod 5 is provided with an inclined surface, the circumferential cross-section of the eccentric block 6 is a right-angled trapezoid, and the axial cross-section of the eccentric block 6 is a circle. The contact ball 16 passes through the inclined surface of the inlet pipe 12 to the eccentric block 6, and a spring III 17 is fixedly connected between the contact ball 16 and the inlet pipe 12, so that when the guide fan 4 rotates, the eccentric block 6 can be driven to rotate synchronously through the connecting rod 5, so that the position of the end of the eccentric block 6 with the inclined surface, away from the guide fan 4 and the position of the point close to the guide fan 4, at the same point in the circumferential direction, are in a continuous changing process, forming a position difference in the linear direction, so that the contact ball 16 intermittently obtains the position difference of the eccentric block 6 in the linear direction, and cooperates with the elastic force of the spring III 17 to enable the contact ball 16 to obtain a reciprocating motion force in the linear direction, driving the heat exchange plate I 13 to reciprocate through the straight pipe 14.

[0042] See Figure 2 , Figure 4 , Figures 6 to 10 A tee pipe Ⅰ18 is welded to the center of one end of the heat exchange plate Ⅰ13 close to the heat exchange plate Ⅱ19, and two symmetrical connecting pipes Ⅰ20 are fixedly connected to the bottom of the heat exchange plate Ⅱ19. The opposite ends of the two symmetrical connecting pipes Ⅰ20 are respectively hinged on the two ports of the tee pipe Ⅰ18, so that the cold medium in the heat exchange plate Ⅰ13 can enter the heat exchange plate Ⅱ19 through the tee pipe Ⅰ18 and the connecting pipe Ⅰ20. When the heat exchange plate Ⅰ13 moves in the direction away from the input pipe 12, it can drive the hinged heat exchange plate Ⅱ19 to move in the same direction. At this time, the bottom of the heat exchange plate Ⅱ19 can pass through the connecting pipe Ⅰ20. With the tee pipe Ⅰ18 as the hinge point, the bottom of the heat exchange plate Ⅱ19 tilts away from the input pipe 12, and the top of the heat exchange plate Ⅱ19 will tilt toward the direction close to the input pipe 12. Similarly, when the heat exchange plate Ⅰ13 moves in the direction close to the input pipe 12, the tilt direction of the heat exchange plate Ⅱ19 is opposite.

[0043] See Figure 2 , Figure 4 , Figures 6 to 10Two symmetrical connecting pipes II 21 are fixedly connected to the top of the heat exchange plate II 19, and a tee pipe II 23 is welded to the center of one end of the heat exchange plate III 22 close to the heat exchange plate II 19. The opposite ends of the two symmetrical connecting pipes II 21 are hinged to the two ports of the tee pipe II 23, so that the cold medium in the heat exchange plate II 19 can be input into the heat exchange plate III 22 through the connecting pipe II 21 and the tee pipe II 23. When the top of the heat exchange plate II 19 tilts toward the direction close to the input pipe 12, the heat exchange plate III 22 can be pushed upward. At this time, the end of the heat exchange plate III 22 close to the heat exchange plate II 19 will tilt upward with the tee pipe II 23 as the hinge point. Similarly, when the top of the heat exchange plate II 19 tilts toward the direction away from the input pipe 12, the heat exchange plate III 22 can be pulled downward. At this time, the end of the heat exchange plate III 22 close to the heat exchange plate II 19 will tilt downward with the tee pipe II 23 as the hinge point.

[0044] See Figure 2 , Figure 4 , Figures 7 to 10 A 90-degree elbow 24 is welded to the center of the end of the heat exchange plate III 22 away from the heat exchange plate II 19. The elbow 24 is parallel to the horizontal plane. The end of the elbow 24 away from the heat exchange plate III 22 is hinged to the end of the output pipe 25 close to the heat exchange plate III 22, so that the medium in the heat exchange plate III 22 can enter and exit the output pipe 25 through the elbow 24. When the end of the heat exchange plate III 22 close to the heat exchange plate II 19 will tilt upward or downward with the tee pipe II 23 as the hinge point, the end of the heat exchange plate III 22 away from the heat exchange plate II 19 will use the position of the hinged output pipe 25 as the fixed point to complete the tilting action of the heat exchange plate III 22.

[0045] See Figures 8 to 10 In the process of the straight tube 14 driving the heat exchange plate I 13 to move back and forth in a straight line, the heat exchange plate II 19 will make an inclined reciprocating motion, and the heat exchange plate II 19 drives the heat exchange plate III 22 to make an inclined reciprocating motion, so that the highest point and the lowest point of the heat exchange plate are in a constantly changing state, so that the flow potential energy of the cold medium in the heat exchange plate is constantly changing. In the process of constantly changing potential energy, the kinetic energy will also be constantly changing, so that the cold medium in the heat exchange plate is in an accelerated and decelerated flow state, so that the turbulence of the cold medium in the heat exchange plate is aggravated. In the reciprocating motion of the heat exchange plate, the contact amount with the high-temperature exhaust gas per unit time is increased, more direct contact heat exchange of the high-temperature exhaust gas is obtained, and the heat exchange effect is improved.

[0046] See Figures 8 to 10At the same time, due to the reciprocating motion of the heat exchange plate, the heat exchange plate stirs the high-temperature exhaust gas in the heat exchange chamber 2 to improve the turbulent state of the flowing high-temperature exhaust gas, and due to the inclined reciprocating motion of the heat exchange plate II 19 and the heat exchange plate III 22, the space size at different positions of the heat exchange chamber 2 around the heat exchange plate II 19 and the heat exchange plate III 22 will be continuously changed, thereby guiding the high-temperature exhaust gas to flow through the heat exchange plate II 19 and the heat exchange plate III 22 to a larger space under the difference in space size, so that the high-temperature exhaust gas continuously flows between the heat exchange plate II 19 and the heat exchange plate III 22, further improving the turbulent state and improving the efficiency of heat exchange.

[0047] Example 3

[0048] See also Figures 2 to 3 , Figures 8 to 10 Symmetrical receiving grooves Ⅰ7 and Ⅱ71 are opened in the dragon kiln flue 1. The receiving grooves Ⅰ7 and Ⅱ71 are close to the input pipe 12. The receiving groove Ⅰ7 is located above the heat exchange plate Ⅰ13, and the receiving groove Ⅱ71 is located below the heat exchange plate Ⅰ13.

[0049] See Figures 2 to 3 , Figures 8 to 10 , a valve plate Ⅰ8 is movably sleeved in the receiving groove Ⅰ7, and two symmetrical springs Ⅰ10 are fixedly connected between the top of the valve plate Ⅰ8 and the bottom of the receiving groove Ⅰ7. Two symmetrical pull ropes 11 are fixedly connected to the top of the valve plate Ⅰ8, and the other end of the pull rope 11 passes through the dragon kiln flue 1 and is fixedly connected to the bottom of the heat exchange chamber 2. The part of the pull rope 11 located in the heat exchange chamber 2 passes between the interlaced pipes of the heat exchange plate Ⅰ13. In the process of the heat exchange plate Ⅰ13 moving away from the motor group 3, the pull rope 11 will be squeezed, so that the pull rope 11 pulls the valve plate Ⅰ8 up. At this time, the spring Ⅰ10 will be compressed. When the heat exchange plate Ⅰ13 moves closer to the motor group 3, the squeezing force on the pull rope 11 gradually disappears, so that the pulling force of the pull rope 11 on the valve plate Ⅰ8 gradually disappears, so that the compressed spring Ⅰ10 pushes the valve plate Ⅰ8 to move downward, and the bottom of the valve plate Ⅰ8 is fixedly sleeved with a high-temperature resistant magnet Ⅰ9.

[0050] See Figures 2 to 3 , Figures 8 to 10, a valve plate II 81 is movably sleeved in the receiving groove II 71, and two symmetrical springs II 101 are fixedly connected between the bottom end of the valve plate II 81 and the bottom of the receiving groove II 71. A high-temperature resistant magnet II 91 is fixedly sleeved on the top of the valve plate II 81. The high-temperature resistant magnet I9 and the opposite ends of the high-temperature resistant magnet II 91 repel each other. In the process of the valve plate I8 being lifted, the repulsive force provided by the high-temperature resistant magnet I9 in the valve plate I8 to the high-temperature resistant magnet II 91 in the valve plate II 81 is weakened, so that the spring II 101 pushes the valve plate II 81 to be lifted. Spring I10 pushes valve plate I8 to move downward. At this time, the repulsive force provided by the high-temperature resistant magnet I9 in valve plate I8 to the high-temperature resistant magnet II91 in valve plate II81 is enhanced, pushing valve plate II81 downward (spring II101 is compressed at this time), so that valve plate I8 and valve plate II81 close the space above or below the heat exchange plate I13 under different conditions, causing the high-temperature exhaust gas to continuously pass through the heat exchange plate I13 up and down, so that the heat exchange plate I13 moving in a straight line can also contact more high-temperature exhaust gas, thereby improving the heat exchange effect.

Claims

1. A dragon kiln tail gas waste heat recovery device, characterized in that: The invention comprises a dragon kiln flue (1), wherein a heat exchange chamber (2) is provided in the dragon kiln flue (1) for providing a heat exchange space for high-temperature exhaust gas, a motor group (3) is provided in the heat exchange chamber (2), and a guide fan (4) is provided at the output end of the motor group (3) for guiding the flow direction of the high-temperature exhaust gas; Heat exchange plates, including a bottom horizontal heat exchange plate I (13), a middle vertical heat exchange plate II (19), and a top horizontal heat exchange plate III (22), wherein the heat exchange plates are sleeved in the heat exchange chamber (2) and are used for large-area contact with the high-temperature exhaust gas in the heat exchange chamber (2) for heat exchange; The reversing device comprises a receiving groove I (7) and a receiving groove II (71) symmetrically arranged in the dragon kiln flue (1), wherein a valve plate I (8) is arranged in the receiving groove I (7), and a valve plate II (81) is arranged in the receiving groove II (71), for sealing part of the space of the heat exchange chamber (2) and changing the flow direction of the exhaust gas.

2. A dragon kiln tail gas waste heat recovery device according to claim 1, characterized in that: The cross sections of the dragon kiln flue (1) and the heat exchange chamber (2) are both Z-shaped, and the heat exchange plate is Z-shaped, so as to prolong the contact time with the high-temperature exhaust gas.

3. The dragon kiln tail gas waste heat recovery device according to claim 2, characterized in that: The bottom of the dragon kiln flue (1) is sleeved with an input pipe (12), and the top of the dragon kiln flue (1) is sleeved with an output pipe (25). The bottom of the heat exchange plate is connected to the input pipe (12) for inputting cold medium into the heat exchange plate, and the top of the heat exchange plate is connected to the output pipe (25) for outputting hot medium in the heat exchange plate.

4. The dragon kiln tail gas waste heat recovery device according to claim 1, characterized in that: The heat exchange portion of the heat exchange plate is composed of interlaced pipes, which are used for high-temperature exhaust gas to pass through the heat exchange plate for efficient heat exchange.

5. The dragon kiln tail gas waste heat recovery device according to claim 3, characterized in that: A straight tube (14) is provided at the center of one end of the heat exchange plate I (13) away from the heat exchange plate II (19), and a contact ball (16) is provided at the end of the straight tube (14) away from the heat exchange plate I (13). The cross section of the input pipe (12) is L-shaped. The straight tube (14) passes through the input pipe (12) parallel to the horizontal plane and is used to limit the movement direction of the straight tube (14). The straight tube (14) is provided with uniformly distributed through holes (15). The through holes (15) are located in the inner cavity of the input pipe (12) and are used to input the cold medium in the input pipe (12) into the heat exchange plate I (13).

6. The dragon kiln tail gas waste heat recovery device according to claim 5, characterized in that: A connecting rod (5) is provided at the center of one end of the guide fan (4) away from the motor group (3), and an eccentric block (6) is provided at one end of the connecting rod (5) away from the guide fan (4) for synchronous rotation with the guide fan (4).

7. The dragon kiln tail gas waste heat recovery device according to claim 6, characterized in that: An inclined surface is provided at one end of the eccentric block (6) away from the connecting rod (5); the contact ball (16) penetrates the inclined surface of the input pipe (12) to the eccentric block (6) and is used to receive the displacement difference provided by the rotating inclined surface; a spring III (17) is provided between the contact ball (16) and the input pipe (12) to provide power for resetting the contact ball (16).

8. The dragon kiln tail gas waste heat recovery device according to claim 5, characterized in that: The heat exchange plate I (13) is provided with a three-way pipe I (18) at the center of one end close to the heat exchange plate II (19), and two symmetrical connecting pipes I (20) are provided at the bottom of the heat exchange plate II (19). The opposite ends of the two symmetrical connecting pipes I (20) are respectively hinged on the two ports of the three-way pipe I (18) to provide the heat exchange plate II (19) with an inclined linear motion. The top of the heat exchange plate II (19) is provided with two symmetrical connecting pipes II (21), and the heat exchange plate III (22) is provided with a three-way pipe II (21) at the center of one end close to the heat exchange plate II (19). 3), the opposite ends of the two symmetrical connecting pipes II (21) are respectively hinged on the two ports of the three-way pipe II (23), and are used to provide a dynamic hinge point when the heat exchange plate II (19) and the heat exchange plate III (22) are tilted. A ninety-degree elbow (24) is provided at the center of one end of the heat exchange plate III (22) away from the heat exchange plate II (19). The elbow (24) is parallel to the horizontal plane. The end of the elbow (24) away from the heat exchange plate III (22) is hinged to the end of the output pipe (25) close to the heat exchange plate III (22), and is used to provide a fixed hinge point when the heat exchange plate III (22) is tilted.

9. The dragon kiln tail gas waste heat recovery device according to claim 1, characterized in that: Two symmetrical springs I (10) are provided between the top of the valve plate I (8) and the bottom of the receiving groove I (7) for providing power for resetting the valve plate I (8). Two symmetrical pull ropes (11) are provided at the top of the valve plate I (8). The other ends of the pull ropes (11) pass through the dragon kiln flue (1) and are connected to the bottom of the heat exchange chamber (2). The pull ropes (11) are located in the heat exchange chamber (2) and pass between the interlaced pipes of the heat exchange plate I (13) for receiving the power for the linear motion of the heat exchange plate I (13).

10. The dragon kiln tail gas waste heat recovery device according to claim 9, characterized in that: Two symmetrical springs II (101) are provided between the bottom end of the valve plate II (81) and the bottom of the receiving groove II (71) for providing power for lifting the valve plate II (81). The bottom of the valve plate I (8) is sleeved with a high-temperature resistant magnet I (9), and the top of the valve plate II (81) is sleeved with a high-temperature resistant magnet II (91). The opposite ends of the high-temperature resistant magnet I (9) and the high-temperature resistant magnet II (91) repel each other, so as to provide power for pressing the valve plate I (8) downward.

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