A high-temperature waste heat recycling system for a gas tunnel kiln

Abstract

This application relates to the field of waste heat recovery and utilization, and discloses a high-temperature waste heat recovery system for a gas-fired tunnel kiln, including a tunnel kiln, a heat exchanger, a blower, and a burner. The heat exchanger is internally equipped with multiple heat exchange tubes for heat exchange. One side of the heat exchanger is fixedly connected to a flue gas inlet chamber. The flue gas inlet chamber is internally equipped with an interception mechanism for intercepting large particles in the high-temperature flue gas and a filtration mechanism for filtering small particles in the high-temperature flue gas. The heat exchanger recovers and utilizes part of the high-temperature flue gas generated during the tunnel kiln processing. Part of the flue gas is introduced into the heat exchanger to exchange heat with the heat exchange tubes, heating the outside air flowing inside the heat exchange tubes. When this air is introduced into the heat exchanger to cooperate with the combustion of gas, it effectively reduces the energy consumption of gas and improves the combustion efficiency of gas.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and utilization technology, specifically to a high-temperature waste heat reuse system for a gas-fired tunnel kiln. Background Technology

[0002] A gas-fired tunnel kiln is a continuous, long tunnel-structured high-temperature industrial firing equipment. It uses natural gas, liquefied petroleum gas, or coal gas as fuel, which burns stably inside the kiln to generate high temperatures. During operation, the product is placed on a kiln car, which slowly enters from the kiln head, passes through the preheating zone, firing zone, and cooling zone, and exits from the kiln tail. It is mainly used to process products that require long-term high-temperature sintering, such as ceramic bricks and tiles, refractory materials, lithium battery materials, ceramsite, and powder metallurgy blanks. The entire process, including drying, heating, high-temperature sintering, and cooling, is completed continuously and automatically.

[0003] Currently, in the operation of gas-fired tunnel kilns, air is usually used as the combustion medium for gas combustion. However, the initial temperature and humidity of the air are directly affected by the external environment. For example, when the ambient temperature is low in winter, the air temperature is also low. When low-temperature air is introduced into the burner to cooperate with gas combustion, the low-temperature air will interfere with the combustion chamber of the burner, causing the internal temperature of the combustion chamber to drop. As a result, the gas cannot achieve complete combustion. In order to ensure the temperature stability inside the combustion chamber, the gas needs to consume additional heat to heat the low-temperature air during combustion. Therefore, this will directly lead to an increase in gas consumption and combustion time, resulting in a decrease in gas utilization and ultimately an increase in gas energy consumption. In view of this, the present invention provides a high-temperature waste heat recovery system for gas-fired tunnel kilns. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-temperature waste heat recovery system for gas-fired tunnel kilns. This system solves the problem that gas combustion requires additional heat to heat low-temperature air, which directly leads to increased gas consumption and combustion time, resulting in decreased gas utilization and ultimately increased gas energy consumption.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature waste heat recovery system for a gas-fired tunnel kiln, comprising a tunnel kiln, a heat exchanger, a blower, and a burner. The heat exchanger is internally equipped with multiple heat exchange tubes for heat exchange. One side of the heat exchanger is fixedly connected to a flue gas inlet chamber. The flue gas inlet chamber is internally equipped with an interception mechanism for intercepting large particles in the high-temperature flue gas and a filtration mechanism for filtering small particles in the high-temperature flue gas. The filtration mechanism includes a rotatable rotating cylinder, with multiple diverting plates fixedly connected to the outer side of the rotating cylinder. A guide plate for guiding the flue gas is provided on the outer side of the diverting plate, and a filter plate for filtering the flue gas is provided on one side of the guide plate. All the diverting plates are arranged in an arc shape, and the width between two diverting plates near the axis of the rotating cylinder is greater than the width away from the rotating cylinder.

[0006] Preferably, the filtering mechanism further includes a movable push rod, the surface of which is fixedly connected to a sliding column, one end of which slides inside a spiral groove opened on the inner side of the rotating cylinder, and the push rod and the rotating cylinder are slidably connected.

[0007] Preferably, a fixing sleeve is provided on the outer side of the flow divider plate, the fixing sleeve is fixedly connected to the heat exchanger, the filter plate is detachably connected to the fixing sleeve, and a flow guide groove plate is provided on the side of the fixing sleeve near the heat exchanger to assist the flow guide plate in guiding the flue gas, and the side of the flow guide groove plate near the flow guide plate is stepped.

[0008] Preferably, the interior of the smoke inlet chamber is further provided with an interception mechanism for assisting the filtration mechanism in pre-filtering the smoke. The interception mechanism includes a movable lower baffle and an interception plate, and the interception plate is arc-shaped and set at the bend of the smoke inlet chamber. An upper arc plate is slidably engaged above the interception plate, and the inner side of the upper arc plate is arc-shaped.

[0009] Preferably, the interception mechanism further includes a cooperating rod fixedly connected to the interception plate, the upper arc plate has a sliding groove inside, and a pair of limiting blocks are fixedly connected inside the sliding groove, and the limiting blocks are arranged diagonally.

[0010] Preferably, a universal ball is provided between the interceptor plate and the push rod, and a retractable protective shell is provided on the outside of the universal ball, and a partition is provided at the sliding groove position opened inside the upper arc plate.

[0011] Preferably, an inclined top column is fixedly connected above the lower baffle, one end of the top column is located directly below the arc position of the push rod, and a filter groove is provided on the side of the lower baffle near the interceptor plate.

[0012] Preferably, the smoke inlet chamber is equipped with a smoke conveyor for conveying smoke, and a conical cylinder is fixedly connected directly below the bend of the smoke inlet chamber. The conical cylinder is narrow at the top and wide at the bottom.

[0013] Preferably, the inner side of the fixing sleeve is concave, the wedge-shaped surface of the guide plate is opened on the side close to the arc surface of the splitter plate, and the arc surface of the splitter plate is concave in the middle and convex on the upper and lower sides.

[0014] Preferably, the heat exchanger has a chimney inside, and a guide column is fixedly connected inside the chimney. The two ends of the guide column are tapered, and the chimney has through grooves at the tapered parts at both ends of the guide column.

[0015] This invention provides a high-temperature waste heat recovery system for gas-fired tunnel kilns. It has the following beneficial effects: 1. This invention recovers and utilizes part of the high-temperature flue gas generated during the tunnel kiln processing through a heat exchanger. Part of the flue gas is introduced into the interior of the heat exchanger to exchange heat with the heat exchange tubes, heating the outside air flowing inside the heat exchange tubes. When this air is introduced into the interior of the heat exchanger to cooperate with the combustion of gas, it will effectively reduce the energy consumption of gas and improve the combustion efficiency of gas. 2. This invention utilizes the combination of a flow divider, a flow guide, and a flow channel plate. When high-temperature flue gas flows into the flue gas inlet chamber, the flow divider continuously and dynamically adjusts its angle to intercept and divert the flue gas. This increases the number of collisions between particles in the flue gas and the flow divider and flow guide, effectively intercepting particulate matter in the flue gas. This improves the cleanliness of the flue gas entering the heat exchanger and exchanging heat with the heat exchange tubes, preventing the formation of a thick layer of impurities on the surface of the heat exchange tubes, which would affect the heating effect of the air flowing inside the heat exchange tubes. Furthermore, through the setting of the interception plate and the lower baffle, as the interception plate continuously adjusts its position to intercept and filter particles in the flue gas, the lower baffle also actively cooperates in interception, effectively ensuring the interception effect of the interception plate on particles, thereby further improving the particle interception and filtration effect of the subsequent flow divider and flow guide. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the heat exchanger and blower of the present invention; Figure 3 This is a side view schematic diagram illustrating the principle of flue gas and airflow in this invention; Figure 4 This is a schematic diagram of the filtration mechanism of the present invention; Figure 5 This is a schematic diagram of the flow divider and guide plate of the present invention; Figure 6 This is an exploded view of the filtration mechanism of the present invention; Figure 7 This is a schematic diagram of the sliding column and rotating cylinder of the present invention; Figure 8 This is a schematic diagram of the flue gas flow channel between the guide plate and the fixed sleeve of the present invention; Figure 9 This is a schematic diagram of the interception mechanism of the present invention; Figure 10 This is a schematic diagram of the upper arc plate and the limiting block of the present invention; Figure 11This is a schematic diagram illustrating the principle of flue gas flow inside the flue gas inlet chamber according to the present invention.

[0017] The components include: 1. Tunnel kiln; 2. Heat exchanger; 3. Blower; 4. Burner; 5. Heat exchange tube; 6. Filtration mechanism; 601. Push rod; 602. Rotating cylinder; 603. Diverter plate; 604. Guide plate; 605. Filter plate; 606. Guide channel plate; 607. Fixing sleeve; 608. Sliding column; 7. Interception mechanism; 701. Top column; 702. Lower baffle; 703. Upper arc plate; 704. Interception plate; 705. Matching rod; 706. Limiting block; 8. Smoke feeder; 9. Chimney; 10. Guide column; 11. Smoke inlet chamber; 12. Conical cylinder. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 6 As shown, the present invention provides a high-temperature waste heat recovery system for a gas-fired tunnel kiln, including a tunnel kiln 1, a heat exchanger 2, a blower 3 and a burner 4. The heat exchanger 2 is provided with a plurality of heat exchange tubes 5 for heat exchange. One side of the heat exchanger 2 is fixedly connected to a flue gas inlet chamber 11. The flue gas inlet chamber 11 is provided with an interception mechanism 7 for intercepting large particles in the high-temperature flue gas and a filtration mechanism 6 for filtering small particles in the high-temperature flue gas. The filter mechanism 6 includes a rotatable rotating cylinder 602. Multiple diverter plates 603 are fixedly connected to the outer side of the rotating cylinder 602. A guide plate 604 for guiding the flue gas is provided on the outer side of the diverter plate 603. A filter plate 605 for filtering the flue gas is provided on one side of the guide plate 604. The multiple diverter plates 603 are all arc-shaped, and the width between two diverter plates 603 near the axis of the rotating cylinder 602 is greater than the width between them away from the rotating cylinder 602.

[0020] Please see Figures 1 to 6As shown, in order to improve the utilization rate of gas combustion and avoid the situation of increased gas energy consumption and reduced combustion efficiency when gas is mixed with air for combustion, a heat exchanger 2 and a blower 3 are installed above the tunnel kiln 1. When the tunnel kiln 1 generates high-temperature flue gas during processing, part of the high-temperature flue gas is introduced into the interior of the heat exchanger 2 to contact the heat exchange tube 5 for heat exchange, thereby heating the air flowing inside the heat exchange tube 5. The heated air is then transported to the burner 4 by the blower 3 to be burned together with the gas. The preheated air mixed with the gas for combustion will effectively improve the gas utilization rate and avoid the situation where the gas needs to separate some heat to heat the air during combustion, which would lead to increased gas consumption. Please continue reading. Figures 3 to 6 As shown, when the high-temperature flue gas generated by the combustion of the tunnel kiln 1 enters the interior of the heat exchanger 2 through the flue gas inlet chamber 11 to heat the flowing air, the high-temperature flue gas generated by the tunnel kiln 1 during product processing contains impurities such as dust particles. If these impurities enter the interior of the heat exchanger 2 with the high-temperature flue gas, a thick layer of impurities will form on the surface of the heat exchange tube 5 over time. The formation of the impurity layer will hinder the effective contact between the subsequently introduced high-temperature flue gas and the heat exchange tube 5, causing the heat exchange efficiency of the heat exchange tube 5 to gradually decrease, and ultimately affecting the heating effect of the air flowing inside the heat exchange tube 5. Therefore, to avoid the above situation, a flow divider 603 and a guide plate 604 are installed inside the flue gas inlet chamber 11 connected to the heat exchanger 2. When the high-temperature flue gas flows inside the flue gas inlet chamber 11 and comes into contact with the surface of the flow divider 603, each flow divider 603 is arc-shaped, and the middle position of multiple flow dividers 603, viewed as a whole, presents a conical shape. Figure 5 and Figure 11 As shown; therefore, after the flue gas comes into contact with the multiple diverter plates 603, it will be intercepted and diverted, and guided by the arc-shaped surface of the diverter plate 603 to the multiple guide plates 604 arranged on the outer side. Furthermore, because the guide plates 604 are wedge-shaped near the arc surface of the diverter plate 603, as... Figure 5 As shown, the guide plate 604 will guide the flue gas after the diversion plate 603 back to the position of the filter plate 605. At this time, the particulate matter in the high temperature flue gas will be directly intercepted by the filter plate 605, and the flue gas will continue to flow and then enter the interior of the heat exchanger 2 to heat the air flowing inside the heat exchange tube 5. Please see Figure 5 and Figure 6It needs to be explained that when the high-temperature flue gas comes into contact with the diversion plate 603 and the guide plate 604, the particulate matter in the flue gas will continuously collide with and be exposed to the diversion plate 603 and the guide plate 604. At this time, the diversion plate 603 and the guide plate 604 will intercept the particulate matter in the flue gas, causing it to fall out of the flue gas and be absorbed and collected by the filter plate 605. Moreover, since the guide plate 604 is fixedly set, when the high-temperature flue gas first starts to flow inside the flue gas inlet chamber 11, the particles in the flue gas may fully contact and collide with the diversion plate 603 and the guide plate 604, and be filtered and intercepted, and then collected by the filter plate 605. However, the high-temperature flue gas generated during the processing of products in the tunnel kiln 1 is continuously generated. Therefore, after the flue gas has been flowing for a period of time, the particulate matter in the flue gas will gradually decrease. If the flow channel formed between the diverter plate 603 and the guide plate 604 is not properly adapted, some particles in the flue gas will not come into contact with the diverter plate 603 and the guide plate 604, resulting in a reduction in the particulate matter interception effect in the flue gas. Therefore, when the high-temperature flue gas flows inside the flue gas inlet chamber 11, the rotatable rotating cylinder 602 drives multiple diverter plates 603 to continuously rotate and adjust their angles inside the guide plate 604. This causes the flue gas guided by the arc surface of the diverter plate 603 to flow into the guide plate 604, which continuously changes the contact position between the flue gas and the guide plate 604, thereby disrupting the fixed flow channel of the flue gas. This allows the particulate matter in the flue gas to fully contact and collide with the diverter plate 603 and the guide plate 604, effectively improving the particulate matter filtration effect of the flue gas. Please see Figure 5 and Figure 6 It should be further explained that, because the width between the two flow dividers 603 near the axis of the rotating cylinder 602 is greater than the width away from the rotating cylinder 602—that is, the gap in the middle of the flow dividers 603 is larger, while the gap on the outer side is smaller—when the flue gas comes into contact with the arc-shaped surfaces of the multiple flow dividers 603, some of the high-temperature flue gas will pass directly through. This is because the flue gas contains impurities such as large and small particles. Large particles have greater inertia when flowing with the flue gas, while small particles have less inertia. Therefore, large particles tend to be more concentrated in the center of the flue gas, while small particles... The particles are located on the periphery. When the flue gas comes into contact with the diverter plate 603, large particles will be directly intercepted by the cone-shaped part of the diverter plate 603, while small particles will collide with the arc surface of the diverter plate 603. Even if some small particles slip through the net, they will be intercepted by the guide plate 604 and the filter plate 605, thereby effectively improving the filtration effect of impurities in the flue gas. The large gap in the middle position will also prevent insufficient flow of flue gas, allowing the flue gas to smoothly enter the interior of the heat exchanger 2 and exchange heat with the heat exchange tube 5.

[0021] Please see Figure 6 and Figure 7As shown, the filter mechanism 6 also includes a movable push rod 601. A sliding column 608 is fixedly connected to the surface of the push rod 601. One end of the sliding column 608 slides inside the spiral groove opened on the inner side of the rotating cylinder 602. The push rod 601 and the rotating cylinder 602 are slidably connected.

[0022] Please see Figure 6 and Figure 7 As shown, when high-temperature flue gas enters the heat exchanger 2 through the flue gas inlet chamber 11, the push rod 601 will drive the sliding column 608 to slide inside the spiral groove opened inside the rotating cylinder 602 during the reciprocating movement, thereby driving the rotating cylinder 602 to rotate. The rotation of the rotating cylinder 602 will drive the diverter plate 603 to rotate, so that the diverter plate 603 adjusts to the position corresponding to the guide plate 604. When the flue gas comes into contact with the diverter plate 603, the arc surface of the diverter plate 603 guides it to the guide plate 604, which will continuously change the contact position between the flue gas and the guide plate 604, so as to avoid the flue gas always flowing in a fixed flow channel, which would prevent the particulate matter carried inside from effectively colliding with the diverter plate 603 and the guide plate 604, thereby reducing the effect of the filter plate 605 in collecting particulate matter. Please see Figure 5 and Figure 6 as well as Figure 11 As shown, since the guide plate 604 is located on the side away from the arc surface of the diverter plate 603, and the filter plate 605 is located directly outside the diverter plate 603, after the diverter plate 603 intercepts and diverts the flue gas, some of the flue gas will be directly guided to the position of the filter plate 605 to contact it. The filter plate 605 can then directly intercept and filter the particles in the flue gas. In order to avoid a large amount of flue gas completely contacting the filter plate 605, which would reduce the filtration effect of the filter plate 605 on particles, some of the flue gas will be guided by the guide plate 604 to continue to contact the filter plate 605. Moreover, since the guide plate 604 and the filter plate 605 are staggered, the flue gas that is re-guided by the guide plate 604 and then contacts the filter plate 605 will also prevent the particles in the flue gas from always contacting a certain point on the filter plate 605. This allows the filter plate 605 to contact the particles over a large area, effectively improving the interception and filtration effect of particles.

[0023] Please see Figures 5 to 8 As shown, a fixing sleeve 607 is provided on the outer side of the flow divider 603. The fixing sleeve 607 is fixedly connected to the heat exchanger 2. The filter plate 605 is detachably connected to the fixing sleeve 607. A flow guide plate 606 is provided on the side of the fixing sleeve 607 near the heat exchanger 2 to assist the flow guide plate 604 in guiding the flue gas. The flow guide plate 606 is stepped on the side of the flow guide plate 604.

[0024] Please see Figures 5 to 8As shown, by setting multiple sets of filter plates 605 detachably connected to the fixed sleeve 607, after the filter plates 605 have been used for a period of time, they can be removed and cleaned to continue adsorbing particulate matter in the flue gas. When the particulate matter in the flue gas collides and is intercepted by the diversion plate 603 and the guide plate 604, and is adsorbed by the filter plates 605, in order to avoid the situation that some particulate matter cannot be intercepted, a guide trough plate 606 is set to guide the high-temperature flue gas. Since the side of the guide trough plate 606 near the guide plate 604 is set in a stepped shape, the flue gas will also come into contact with and collide with one side of the guide trough plate 606 during the flow, and the particulate matter in the flue gas will continue to be intercepted, thus further improving the flue gas filtration effect. Please see Figure 8 It should be noted that the flow channel between the fixed sleeve 607 and the filter plate 605 is folded. When the flue gas comes into contact with the guide plate 604 and flows in the folded flow channel, it will directly contact the stepped surface of the guide groove plate 606. This allows the guide groove plate 606 to effectively guide the flue gas while allowing the particles in the flue gas to be intercepted and filtered again. This prevents the particles that are not completely intercepted and filtered from entering the interior of the heat exchanger 2 after the flue gas flows directly and adhering to the surface of the heat exchange tube 5, thus affecting the heating effect of the air flowing inside the heat exchange tube 5.

[0025] Please see Figures 9 to 11 As shown, the smoke inlet chamber 11 is also equipped with an interception mechanism 7 for assisting the filter mechanism 6 in pre-filtering the smoke. The interception mechanism 7 includes a movable lower baffle 702 and an interception plate 704. The interception plate 704 is arc-shaped and set at the bend of the smoke inlet chamber 11. An upper arc plate 703 is slidably engaged above the interception plate 704, and the inner side of the upper arc plate 703 is arc-shaped.

[0026] Please see Figures 9 to 11As shown, although the rotatable diverter plate 603 can increase the number of collisions between particulate matter in the flue gas and the diverter plate 603 to a certain extent, thereby improving the interception effect of particulate matter, and the conical middle part can intercept and filter large particles, the flow inertia of large particles is greater than that of small particles. Relying solely on the interception of the middle part of the diverter plate 603 may still cause large particulate impurities to directly follow the flue gas into the interior of the heat exchanger 2, affecting the heat exchange effect of the heat exchange tube 5. Therefore, by setting a movable interceptor plate 704 at the bend of the flue gas inlet chamber 11, When the flue gas flows through the bend in the flue gas inlet chamber 11, it will exert an impact force on the interceptor plate 704, causing the interceptor plate 704 to slide inside the upper arc plate 703. Moreover, because the inner side of the upper arc plate 703 is arc-shaped, when the flue gas comes into contact with the upper arc plate 703 and flows in the arc track, the impact force on the interceptor plate 704 will continuously increase, thereby better driving the interceptor plate 704 to slide below the upper arc plate 703. At this time, the sliding of the interceptor plate 704 will push the push rod 601 to move, thereby driving the diverter plate 603 to adjust its angle. When the flue gas comes into contact with the interceptor plate 704, since the interceptor plate 704 is arc-shaped, the flue gas will directly contact the inner arc surface of the interceptor plate 704. Also, since the interceptor plate 704 is located in the middle of the bend in the flue gas inlet chamber 11, particles with high flow inertia will directly contact the interceptor plate 704 and be intercepted by the inner arc surface of the interceptor plate 704. After the large particles are intercepted to a certain extent by the interceptor plate 704, they continue to flow to the position of the diversion plate 603. The number of particles intercepted by the diversion plate 603 will be reduced, thus improving the diversion plate 603's effect on intercepting large particles. Please see Figure 11 As shown, since the bend in the smoke inlet chamber 11 is equipped with not only an interceptor plate 704 for intercepting large particles, but also an upper arc plate 703 to improve the sliding stability of the interceptor plate 704, after the flue gas flow impacts the interceptor plate 704, backflow may occur below the upper arc plate 703. The particles in this backflowing flue gas will not directly contact the interceptor plate 704, causing the interceptor plate 704 to be unable to effectively intercept and filter them. Therefore, by also setting a movable lower baffle 702 at the bend in the smoke inlet chamber 11, when the interceptor plate 704 slides inside the upper arc plate 703, the position between the lower baffle 702 and the interceptor plate 704 will be adjusted appropriately, so that the flue gas flow channel formed between the two changes. This allows the lower baffle 702 to also intercept and filter the particles in the backflowing flue gas to a certain extent, thereby fully ensuring the effect of the subsequent diversion plate 603 in intercepting and filtering particles.

[0027] Please see Figure 9 and Figure 10As shown, the interception mechanism 7 also includes a mating rod 705 fixedly connected to the interception plate 704. The upper arc plate 703 has a sliding groove inside, and a pair of limiting blocks 706 are fixedly connected inside the sliding groove, and the limiting blocks 706 are arranged diagonally.

[0028] Please see Figure 9 and Figure 10 As shown, when the rapidly flowing high-temperature flue gas is guided by the arc-shaped flow channel inside the upper arc plate 703 to the interceptor plate 704, driving the interceptor plate 704 to slide below the upper arc plate 703, the sliding of the interceptor plate 704 will cause the mating rod 705 to slide inside the groove opened inside the upper arc plate 703. In order to make the movement of the interceptor plate 704 continuously drive the push rod 601 to slide back and forth inside the rotating cylinder 602, driving the diverter plate 603 to dynamically adjust the angle. Therefore, when the mating rod 705 inside the interceptor plate 704 slides to the limit position inside the groove, it will contact the limit block 706 set diagonally inside the groove. Since the flue gas flow is continuous... Therefore, after the interceptor plate 704 moves to its limit position, its internal mating rod 705 will contact the limiting block 706 and be limited by the limiting block 706. Then, it will slide from the bottom of the slide groove to the top of the slide groove. Since there is a return spring on the top of the slide groove, after the two ends of the mating rod 705 move to the top of the slide groove, they will drive the push rod 601 to move in the opposite direction inside the rotating cylinder 602 under the action of the return spring. This causes the interceptor plate 704 to adjust back and forth between approaching and moving away from the diverter plate 603. This causes the interceptor plate 704 to continuously push the push rod 601 to move, thereby improving the interception effect of the diverter plate 603 on large particles of debris. Furthermore, since the interceptor plate 704 is initially located in the middle of the bend in the smoke inlet chamber 11, as the interceptor plate 704 continues to move, it will gradually move away from the middle of the smoke inlet chamber 11. Therefore, the pushing effect of the flue gas on the interceptor plate 704 is also continuously weakening. Thus, the impact force exerted on the interceptor plate 704 by the flue gas flowing in the arc-shaped flow channel inside the upper arc plate 703 will enable the reset spring to effectively drive the interceptor plate 704 to reset, thus preventing the push rod 601 from being unable to effectively drive the diverter plate 603 to adjust its angle due to the continuous pushing of the interceptor plate 704 by the rapidly flowing flue gas.

[0029] Please continue reading. Figure 9 and Figure 10 As shown, a universal ball is provided between the interceptor plate 704 and the push rod 601, and a retractable protective shell is provided on the outside of the universal ball. A partition is provided at the sliding groove position inside the upper arc plate 703.

[0030] Please continue reading. Figure 9 and Figure 10As shown, since the push rod 601 and the rotating cylinder 602 are slidably connected, and the push rod 601 moves in a linear reciprocating motion during movement, in order to ensure that the intercepting plate 704 stably drives the push rod 601, a universal ball is provided on the outer arc surface of the intercepting plate 704 and is movably connected to one end of the push rod 601. In order to avoid the impact of particulate matter on the universal ball, a retractable protective shell is provided on the outside of the universal ball. Even after the intercepting plate 704 moves and changes position below the upper arc plate 703, one end of the push rod 601 can still be stably pushed by the intercepting plate 704 under the action of the universal ball and the retractable protective shell, so that the push rod 601 always slides inside the rotating cylinder 602 in a linear reciprocating motion, thereby driving the diverting plate 603 to rotate stably for angle adjustment. Furthermore, to prevent particulate matter from affecting the sliding of the mating rod 705 within the inner groove of the upper arc plate 703, which could cause the mating rod 705 to become stuck when it contacts the limiting block 706 after sliding to the limit position of the groove, thus preventing the intercepting plate 704 from stably resetting under the action of the reset spring, a partition is installed at the groove position inside the upper arc plate 703. The partition also guides the sliding of the mating rod 705 to a certain extent, allowing the mating rod 705 to pass the limit position of the groove in a more stable state after sliding contact with the limiting block 706, moving from the bottom of the groove to the top of the groove to reset, effectively improving the overall stability of the intercepting plate 704 during movement.

[0031] Please continue reading. Figure 9 and Figure 10 As shown, an inclined top column 701 is fixedly connected above the lower baffle 702. One end of the top column 701 is located directly below the arc-shaped position of the push rod 601. A filter groove is provided on the side of the lower baffle 702 near the interceptor plate 704.

[0032] Please continue reading. Figure 9 and Figure 10 As shown, when the flue gas pushes the interceptor plate 704 to slide below the upper arc plate 703, the interceptor plate 704 drives the push rod 601 to perform linear reciprocating motion through the universal ball. Since the middle position of the push rod 601 is arc-shaped, the push rod 601 will push the lower baffle 702 at one end of the top column 701 to slide at the corner position of the smoke inlet chamber 11 through the arc surface during the movement. When the interceptor plate 704 moves closer to the diverter plate 603, the lower baffle 702 will also move towards the diverter plate 603 at the corner position of the smoke inlet chamber 11, so that the flue gas flow channel between the interceptor plate 704 and the lower baffle 702 is as close to the same width as possible. At this time, during the flow of the flue gas, the large particulate matter in it will always be intercepted by the interceptor plate 704 and the lower baffle 702, thereby reducing the large particulate matter in the flue gas that comes into contact with the diverter plate 603 and improving the interception and filtration effect of different particulate matter. Furthermore, when the interceptor plate 704 and the lower baffle 702 move away from the diverter plate 603, the lower baffle 702 will extend a certain distance when it slides at the bend of the smoke inlet chamber 11. In addition, by opening a filter groove on the side of the lower baffle 702 close to the interceptor plate 704, the effect of intercepting and filtering particulate matter in the flue gas will be further improved.

[0033] Please see Figure 4 and Figure 11 As shown, a smoke feeder 8 for conveying flue gas is installed inside the smoke inlet chamber 11. A conical cylinder 12 is fixedly connected directly below the bend of the smoke inlet chamber 11. The conical cylinder 12 is designed to be narrower at the top and wider at the bottom.

[0034] Please see Figure 4 and Figure 11 As shown, since the interceptor plate 704 needs to drive the push rod 601 to perform linear reciprocating motion via the universal ball, and also needs to drive the lower baffle 702 via the push rod 601 to cooperate with the interceptor plate 704 to intercept and filter large particulate impurities in the flue gas, in order to further improve the stable movement of the interceptor plate 704 below the upper arc plate 703 and improve the interception effect of the interceptor plate 704 on particulate matter, a conical cylinder 12 is set directly below the bend of the smoke inlet chamber 11. When the flue gas is driven by the smoke feeder 8 and flows rapidly inside the smoke inlet chamber 11, the flue gas will first pass through the conical cylinder 12. Therefore, the shape of the conical cylinder 12, which is narrow at the top and wide at the bottom, will cause the rapidly flowing flue gas to impact the interceptor plate 704 with acceleration, so that the force used by the interceptor plate 704 to drive the push rod 601 and the top column 701 remains stable. Furthermore, after the conical cylinder 12 guides the flue gas, the flue gas, which is flowing at an accelerated speed, comes into contact with the filter grooves opened on the sides of the interceptor plate 704 and the lower baffle 702, which will cause large particles in the flue gas to be separated more quickly. Because the flow inertia of large particles is greater, the filtration effect will be better, and the number of collisions of large particles will also increase, thereby effectively improving the interception and filtration effect of large particles.

[0035] Please see Figure 5 and Figure 6 As shown, the inner side of the fixed sleeve 607 is concave, the wedge-shaped surface of the guide plate 604 is opened on the side close to the arc surface of the splitter plate 603, and the arc surface of the splitter plate 603 is concave in the middle and convex on the upper and lower sides.

[0036] Please see Figure 5 and Figure 6As shown, when the flue gas flows inside the flow channel between the filter plate 605 and the guide plate 606, to prevent the flue gas that has already flowed past the position of the diverter plate 603 from forming a fixed memory in this flow channel, that is, this channel is a fixed channel, it may cause some particles that are not completely intercepted by the guide plate 604 and the diverter plate 603 to enter the interior of the heat exchanger 2 even if the flue gas comes into contact with the stepped position of the guide plate 606 near the guide plate 604. Therefore, the interior of the fixed sleeve 607 is designed with a concave shape. When the flue gas passes through the flow channel between the fixed sleeve 607 and the guide plate 606, before hitting the stepped surface of the guide plate 606, the flue gas will come into contact with the arc surface of the concave position on the inner side of the fixed sleeve 607. And because the inner side of the concave groove is arc-shaped, such as Figure 8 As shown, the particulate matter in the flue gas will be more effectively intercepted and filtered. Furthermore, the arc surface of the diverter 603 is concave in the middle and convex on the upper and lower sides. After the flue gas is intercepted and diverted by it, the flue gas will not flow in a straight line to the position of the guide plate 604, but will flow in a more arc-shaped trajectory. When the flue gas flows to the position of the guide plate 604, and with the rotation adjustment of the diverter 603, the fixed flow channel formed between the diverter 603 and the guide plate 604 will be better disrupted, increasing the number of collisions between the particulate matter in the flue gas and both, thereby improving the effect of intercepting and filtering particulate matter.

[0037] Please see Figures 1 to 4 As shown, a chimney 9 is provided inside the heat exchanger 2, and a guide column 10 is fixedly connected inside the chimney 9. The two ends of the guide column 10 are tapered, and through slots are provided in the tapered parts of the chimney 9 at both ends of the guide column 10.

[0038] Please see Figures 1 to 4 As shown, after the flue gas has been filtered and intercepted, it enters the heat exchanger 2 and flows through the inside of the chimney 9 to the heat exchanger 2. The guide column 10 located inside the chimney 9 guides the flue gas through its conical surface, causing the high-temperature flue gas to rise and then be drawn down and discharged from the exhaust port. Therefore, not only does the clean, high-temperature flue gas fully contact the multiple heat exchange tubes 5 inside the heat exchanger 2, but the flue gas also enters the heat exchanger 2 in a more dispersed state after passing through the conical surface of the guide column 10, thus ensuring a more uniform heat exchange effect of the heat exchange tubes 5. This results in a more uniform air temperature that enters the burner 4 to be burned with the gas, effectively improving the utilization rate of gas combustion and reducing the energy consumption of gas combustion.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature waste heat recycling system for a gas tunnel kiln, comprising a tunnel kiln (1), a heat exchanger (2), a blower (3) and a burner (4), characterized in that, The heat exchanger (2) is provided with multiple heat exchange tubes (5) for heat exchange. One side of the heat exchanger (2) is fixedly connected to the flue gas inlet chamber (11). The flue gas inlet chamber (11) is provided with an interception mechanism (7) for intercepting large particles in the high-temperature flue gas, and a filtration mechanism (6) for filtering small particles in the high-temperature flue gas. The filtration mechanism (6) includes a rotatable rotating cylinder (602), and a plurality of diverter plates (603) are fixedly connected to the outer side of the rotating cylinder (602). A guide plate (604) for guiding the flue gas is provided on the outer side of the diverter plate (603), and a filter plate (605) for filtering the flue gas is provided on one side of the guide plate (604). The plurality of diverter plates (603) are all arc-shaped, and the width between two diverter plates (603) near the axis of the rotating cylinder (602) is greater than the width between them away from the rotating cylinder (602).

2. The system according to claim 1, wherein, The filter mechanism (6) also includes a movable push rod (601), on the surface of which a sliding column (608) is fixedly connected. One end of the sliding column (608) slides inside a spiral groove opened on the inner side of the rotating cylinder (602). The push rod (601) and the rotating cylinder (602) are slidably connected.

3. The system according to claim 1, wherein, A fixing sleeve (607) is provided on the outer side of the flow divider (603). The fixing sleeve (607) is fixedly connected to the heat exchanger (2). The filter plate (605) is detachably connected to the fixing sleeve (607). A flow guide plate (606) is provided on the side of the fixing sleeve (607) near the heat exchanger (2) to assist the flow guide plate (604) in guiding the flue gas. The flow guide plate (606) is stepped on the side of the flow guide plate (604).

4. The high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 1, characterized in that, The smoke inlet chamber (11) is also provided with an interception mechanism (7) for assisting the filter mechanism (6) in pre-filtering the flue gas. The interception mechanism (7) includes a movable lower baffle (702) and an interception plate (704). The interception plate (704) is arranged in an arc shape at the bend of the smoke inlet chamber (11). An upper arc plate (703) is slidably engaged above the interception plate (704), and the inner side of the upper arc plate (703) is arranged in an arc shape.

5. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 4, characterized in that, The interception mechanism (7) also includes a cooperating rod (705) fixedly connected to the interception plate (704). The upper arc plate (703) has a sliding groove inside, and a pair of limiting blocks (706) are fixedly connected inside the sliding groove, and the limiting blocks (706) are arranged diagonally.

6. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 5, characterized in that, A universal ball is provided between the interceptor plate (704) and the push rod (601), and a retractable protective shell is provided on the outside of the universal ball. A partition is provided at the sliding groove position inside the upper arc plate (703).

7. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 5, characterized in that, An inclined top column (701) is fixedly connected above the lower baffle (702). One end of the top column (701) is located directly below the arc-shaped position of the push rod (601). A filter groove is provided on the side of the lower baffle (702) near the interceptor plate (704).

8. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 1, characterized in that, The smoke inlet chamber (11) is equipped with a smoke conveyor (8) for conveying smoke. A conical cylinder (12) is fixedly connected directly below the bend of the smoke inlet chamber (11). The conical cylinder (12) is narrow at the top and wide at the bottom.

9. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 3, characterized in that, The inner side of the fixed sleeve (607) is concave, and the wedge-shaped surface of the guide plate (604) is opened on the side close to the arc surface of the diverter plate (603). The arc surface of the diverter plate (603) is concave in the middle and convex on the upper and lower sides.

10. A high-temperature waste heat recovery system for a gas-fired tunnel kiln according to claim 1, characterized in that, The heat exchanger (2) is provided with a chimney (9) inside, and a guide column (10) is fixedly connected inside the chimney (9). The two ends of the guide column (10) are tapered, and the chimney (9) has through slots at the tapered parts at both ends of the guide column (10).

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