Waste heat recovery equipment for high temperature furnace

Abstract

The present invention relates to the field of heat exchange equipment, and specifically discloses a waste heat recovery device of a high-temperature furnace, comprising a shell, wherein an air inlet and a water inlet are provided on the shell, a heat recovery cylinder is provided in the shell, and partitions, blades, a push plate and a driving assembly are also provided in the shell, wherein the partitions are arranged at intervals along the axial direction of the heat recovery cylinder, the inner wall of each partition is in contact with the inner wall of the heat recovery cylinder, the outer wall of each partition is in contact with the inner wall of the shell, a flue gas channel is formed between adjacent partitions, a connecting port is provided on the partition, any flue gas channel is provided with a plurality of blades, the blades are fixed to the outer wall of the heat recovery cylinder, the high-temperature flue gas introduced through the air inlet pushes the blades to move the heat recovery cylinder to rotate, a push plate is provided between any two circumferentially adjacent blades, the driving assembly pushes the push plate to move in the flow chamber, and pushes the flue gas through the connecting port, the waste heat recovery device provided by the present invention realizes full contact between the flue gas and the heat recovery cylinder, and improves the waste heat recovery efficiency of the flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange equipment, and in particular to waste heat recovery equipment for a high-temperature furnace. Background Art

[0002] A waste heat recovery device is a device specially designed to recover waste heat from flue gas discharged from a high-temperature furnace, converting it into usable energy or using it to preheat other process flows. Waste heat recovery devices mostly use the gas-water waste heat recovery method, that is, the flue gas exchanges heat with condensed water through a heat exchange tube. The condensed water temperature increases and the flue gas temperature decreases, thereby achieving the purpose of heat recovery. In order to improve the waste heat recovery efficiency of the flue gas, it is necessary to increase the residence time of the flue gas in the device so that the flue gas and condensed water can fully exchange heat.

[0003] The patent document with announcement number CN112229251B discloses a rotary waste heat recovery device, which includes a box cover, a heat recovery cylinder and an insulation box. A high-temperature flue gas inlet pipe is fixed to the side near one end of the insulation box. A rotating shaft is fixed through the axis at both ends of the heat recovery cylinder. A scale scraper mechanism is installed on the rotating shaft inside the heat recovery cylinder. The interior of the propeller bin is connected to a propeller through an optical axis, and a gear for driving the scale scraper mechanism is installed on the other end of the optical axis. A cold water inlet is provided on the left end face of the water inlet chamber, and a hot water outlet is rotatably connected to the other end of the rotating shaft. The waste heat recovery device disclosed in the patent document increases the flue gas stroke by setting a partition, and uses the flue gas to drive the heat recovery cylinder to rotate to increase the residence time of the high-temperature flue gas, which is beneficial for the heat recovery cylinder to fully absorb heat.

[0004] The waste heat recovery and utilization device provided by the above patent document is provided with two groups of partitions on the outer peripheral side of the heat recovery cylinder, and a flue gas channel is formed between the two groups of partitions. Two groups of fan blades are also fixed on the outer surface of the heat recovery cylinder, and the two groups of fan blades are respectively located in the flue gas channel. A flue gas guide hole is provided on the partition. When the waste heat recovery device is working, the flue gas enters the flue gas channel and pushes the heat recovery cylinder to rotate. During the rotation of the heat recovery cylinder, the absorbed heat is transferred to the water body in the heat recovery cylinder through the heat conductive sheet, thereby improving the heating efficiency of the water body. The flue gas flows through the flue gas guide hole and enters the next flue gas channel. The two groups of flue gas channels are arranged on the outside of the heat recovery cylinder along the axial direction of the heat recovery cylinder. The flue gas first enters the flue gas channel at the end and pushes the heat recovery cylinder to rotate in the flue gas channel to achieve circumferential contact with the water body, and then enters the next flue gas channel through the flue gas guide hole to continue circumferential contact with the water body, so that the flue gas can fully exchange heat with the water body in the circumferential and axial directions, thereby improving the heat recovery efficiency of the flue gas.

[0005] In the actual working process, after the high-temperature flue gas circulates circumferentially in the smoke channel at the end, it cannot completely enter the next smoke channel through the smoke guide hole for circulation, resulting in a part of the smoke gas may be repeatedly circulated in the smoke channel at the end, and the smoke channel at the rear side may not be able to fully contact the smoke, causing the water body in the heat recovery cylinder to heat up unevenly, and the smoke channel at the end is first in contact with the high-temperature flue gas, it is easy to reach the heat exchange saturation state, the high-temperature flue gas circulates back and forth in the smoke channel, the heat exchange efficiency is low, the water body at the rear side cannot fully exchange heat with the smoke, affecting the recovery efficiency of the flue gas waste heat. Summary of the invention

[0006] The present invention provides a waste heat recovery device for a high temperature furnace, aiming to solve the problem of low flue gas waste heat recovery efficiency due to the inability to fully exchange heat between the flue gas and the water in the heat recovery cylinder when the waste heat recovery device in the related art is working.

[0007] The waste heat recovery device of a high-temperature furnace of the present invention comprises a shell, a partition plate arranged in the shell, and a heat recovery cylinder. A plurality of blades are fixed at intervals on the outer side of the heat recovery cylinder in the circumferential direction. An air inlet is arranged on the shell. The high-temperature flue gas introduced into the air inlet pushes the blades to drive the heat recovery cylinder to rotate. There are a plurality of partition plates, each of which is arranged at intervals along the axial direction of the heat recovery cylinder. Each of the partition plates is sleeved on the outer side of the heat recovery cylinder. A flue gas channel is formed between adjacent partition plates. A communication port is arranged on each of the partition plates. Each of the blades is evenly arranged in each flue gas channel in the circumferential direction.

[0008] The waste heat recovery device also includes a push plate and a drive assembly;

[0009] The push plate is arranged between two circumferentially adjacent blades, with the side of the shell where the air inlet is arranged being the front side. The driving assembly drives the push plate to slide back and forth in contact with the blades on both sides thereof, so that the push plate has two states. State one: when the push plate moves to be opposite to the connecting port, it moves toward the rear side to push the high-temperature flue gas from the connecting port into the rear flue gas channel. State two: when the push plate passes over the connecting port, it moves toward the front side.

[0010] The waste heat recovery efficiency of the flue gas is improved. After the flue gas enters the shell from the air inlet, it passes through the flue gas channels in the shell from front to back in sequence. When the flue gas enters the flue gas channel, it pushes the blades and the heat recovery cylinder to rotate, so that the flue gas is fully in contact with the water in the heat recovery cylinder in the circumferential direction along the flue gas channel. When the flue gas moves to be opposite to the connecting port, the driving component drives the push plate to move, and pushes the flue gas from the front smoke channel through the connecting port into the rear smoke channel, so as to promote the full heat exchange between the smoke gas and the water in the heat recovery cylinder in the axial direction, thereby effectively improving the waste heat recovery effect of the high-temperature flue gas.

[0011] Preferably, the driving assembly comprises two connecting rods, one end of the connecting rod is slidably matched with the push plate, the end face of the other end of the connecting rod is in the shape of an arc-shaped tooth surface, and a hinge position is also provided on the connecting rod, and the hinge position of the connecting rod is located on the axis of the connecting rod tooth surface, and the distance between the two connecting rods of the same driving assembly increases from front to back;

[0012] An annular guide groove is provided on the front side of the partition, at least two racks are provided in the guide groove, the connecting port is located between the two racks, the spacing between two adjacent racks is greater than the width of the push plate, the tooth surface of the connecting rod is slidably matched with the guide groove, the hinge position of the connecting rod is hinged to the rear side of the blade, and when the tooth surface of the connecting rod contacts the rack, the connecting rod rotates around its hinge position.

[0013] It is convenient to push the high-temperature flue gas to move axially along the heat recovery cylinder. A relatively independent chamber is formed between two circumferentially adjacent blades in the same flue gas channel. When the high-temperature flue gas pushes the blades and the heat recovery cylinder to rotate, when each chamber in the flue gas channel moves to be opposite to the connecting port, the tooth surface of the connecting rod on one side engages with a rack in the guide groove. The connecting rod rotates around its hinge position and pushes the push plate to move backward, squeezing the high-temperature flue gas in the chamber into the flue gas channel on the rear side. The other connecting rod engages with the other rack after the chamber passes the connecting port, pushing the push plate to move in the opposite direction and reset. By promoting the high-temperature flue gas to move from front to back at the connecting port, the flue gas is more fully contacted with the water body in the heat recovery cylinder in the axial direction, thereby improving the heat recovery efficiency of the flue gas.

[0014] Preferably, two connecting grooves are provided on the end surface of the rear side of the push plate, the end of the connecting rod extends into the connecting groove and is slidably connected to the connecting groove, and the end of the connecting rod rotates relative to the connecting groove.

[0015] Preferably, a slide groove is provided on the blade, the length direction of the slide groove is parallel to the axial direction of the heat recovery cylinder, the push plate is slidably connected to the slide groove, and a gap is formed at the connection between the push plate and the slide groove.

[0016] In order to reduce the resistance of the push plate when it moves in the flow chamber, a gap is left at the connection between the push plate and the slide slot. When the push plate slides relative to the slide slot, part of the airflow escapes from the gap, reducing the resistance of the push plate when it moves. At the same time, it is convenient for the flue gas to pass through the gap between the push plate and the slide slot between the two blades and move from front to back, so that the flue gas can move smoothly along the axial direction of the heat recovery cylinder.

[0017] Preferably, an adjusting mechanism is also provided in the heat recovery cylinder, and the adjusting mechanism includes a movable telescopic plate, a connecting plate, a movable plate and a supporting assembly. There are multiple movable telescopic plates, two adjacent movable telescopic plates are rotatably connected, and form a water storage cavity for storing water with the side wall of the heat recovery cylinder, the connecting plate is rotatably connected to the movable telescopic plate on the side facing the side wall of the heat recovery cylinder, and abuts against the inner wall of the heat recovery cylinder, a movable groove is provided between two adjacent connecting plates, the outer side of the movable plate is rotatably connected to the movable telescopic plate, each of the movable plates extends into each of the movable grooves one by one and is slidably connected with the movable groove, the size of the water storage cavity changes when the movable plate slides relative to the movable groove, and the supporting assembly extends into the movable groove and abuts against the movable plate.

[0018] Preferably, the support assembly includes a fixed block, a movable block and a support member, and sealing plates are respectively provided at both axial ends of the heat recovery cylinder, the fixed block is fixed relative to the front sealing plate, the movable block is movably connected to the rear sealing plate, the movable block is connected to a driving member, and the driving member drives the movable block to move, and the support members have multiple groups, each group of the support members is arranged along the circumference of the heat recovery cylinder, and one group of the support members includes two support rods, the two support rods are respectively hinged to the movable block or the fixed block through one end thereof, the other ends of the two support rods are hinged, and the connecting ends of the two support rods extend into the movable groove and abut against the movable plate.

[0019] Preferably, the movable block is movably connected to the blocking plate, the driving member is a cylinder, and the protruding end of the driving member is fixed relative to the movable block.

[0020] It is convenient to flexibly adjust the amount of water in the heat recovery cylinder according to the flue gas volume and flue gas temperature. The adjusting mechanism arranged in the heat recovery cylinder is used to adjust the space for accommodating water in the heat recovery cylinder. The movable telescopic plates and the connecting plates divide the heat recovery cylinder into a plurality of relatively isolated water storage chambers, and the supporting assembly can flexibly adjust the size of each water storage chamber, so as to flexibly adjust the difference in water volume in each water storage chamber when there is a difference in flue gas volume and flue gas temperature, and keep the water body in each water storage chamber in a state of being in contact with the side wall of the heat recovery cylinder, so that the flue gas and the water body can fully exchange heat under different water volume states, and it is more flexible and convenient to use.

[0021] Preferably, the shell is also provided with a water injection assembly, which includes a water injection port and a water injection channel, the water injection port is installed on the shell, the water injection channel is arranged between the rear side wall of the shell and the rear sealing plate, the rear sealing plate is provided with a water inlet, there are multiple water inlets, and each of the water inlets is connected to each of the water storage chambers in a one-to-one manner.

[0022] Preferably, the water injection port is connected to the shell through a connecting tube, the length of the connecting tube is adapted to the change in the spacing between the water injection port and the shell, the extended end of the driving member is connected to the connecting tube, the driving member pushes the end of the connecting tube connected to the water injection port to move closer to or away from the shell, the blocking plate is rotatably connected to the heat recovery cylinder, and the movable block is circumferentially fixed to the blocking plate at the rear side;

[0023] The water injection assembly also includes an impeller and a connecting rod. The impeller is connected to the movable block through the connecting rod. The impeller extends into the water injection port and moves synchronously with the water injection port.

[0024] To facilitate the smooth entry of cooling water into each water storage chamber, each water storage chamber is connected to a water inlet, and water enters the water injection channel from the water injection port and further enters each water storage chamber from each water inlet. In addition, when the water enters the water injection port, it contacts the impeller and drives the impeller to rotate. The impeller further drives the connecting rod, the movable block and the sealing plate to rotate. When the two sealing plates rotate relative to the heat recovery cylinder, the balance of water entering each water storage chamber can be improved during the water injection process.

[0025] Preferably, the water injection port is connected to a water pipe and a pump body, and the pump body pumps water from the water pipe into the water injection port.

[0026] The beneficial effects of the present invention are:

[0027] (1) The waste heat recovery efficiency of flue gas is improved. After the flue gas enters the shell from the air inlet, it passes through each flue gas channel from front to back in the shell. When the flue gas enters the flue gas channel, it pushes the blades and the heat recovery tube to rotate, so that the flue gas is in uniform contact with the circumference of the heat recovery tube along the flue gas channel. Under the action of the push plate and the driving component, the flue gas enters the next flue gas channel from the connecting port on the partition, so that the flue gas is in full contact with the heat recovery tube in both the circumferential and axial directions, so that the flue gas can fully exchange heat with the water in the heat recovery tube, thereby improving the waste heat recovery efficiency of the flue gas.

[0028] (2) To ensure the heat conduction effect of the heat recovery tube during long-term use, the push plate can scrape off the dust and particles attached to the surface of the heat recovery tube when it moves in the flow chamber, avoiding the long-term use of the heat recovery tube due to the large number of particles attached to the surface, which affects the heat exchange efficiency between the flue gas and the water body.

[0029] (3) It is convenient to flexibly adjust the amount of water in the heat recovery cylinder according to the flue gas volume and flue gas temperature. The regulating mechanism arranged in the heat recovery cylinder is used to adjust the space for accommodating water in the heat recovery cylinder. Each movable telescopic plate and the connecting plate divide the heat recovery cylinder into a plurality of relatively isolated water storage chambers, and the supporting assembly can flexibly adjust the size of each water storage chamber, so as to flexibly adjust the difference in water volume in each water storage chamber when there is a difference in flue gas volume and flue gas temperature, and keep the water body in each water storage chamber in a state of being in contact with the side wall of the heat recovery cylinder, so that the flue gas and the water body can fully exchange heat under different water volume conditions, and the use is more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the connection between the waste heat recovery equipment and the high-temperature furnace in the present invention.

[0031] Figure 2 It is a schematic diagram of the overall structure of the waste heat recovery equipment in the present invention.

[0032] Figure 3 It is a schematic diagram of the structure inside the shell of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure in which the regulating mechanism is arranged in the heat recovery cylinder in the present invention.

[0034] Figure 5 It is a structural schematic diagram of the support assembly in the present invention.

[0035] Figure 6 It is a schematic structural diagram when the push plate in the present invention moves to be opposite to the communication port.

[0036] Figure 7 It is a structural schematic diagram of the partition in the present invention.

[0037] Figure 8 It is a structural schematic diagram of the connection between the connecting rod and the push plate in the present invention.

[0038] Fig. 9 It is a schematic diagram of the structure of the connection between the drive assembly, the push plate, the heat recovery cylinder and the blades in the present invention.

[0039] Reference numerals:

[0040] 1. Shell; 11. Air inlet; 12. Water injection port; 13. Air outlet; 14. Connecting tube; 15. Impeller; 16. Connecting rod; 2. Heat recovery tube; 21. Partition plate; 211. Connecting port; 212. Guide groove; 213. Rack; 22. Blade; 221. Slide groove; 23. Push plate; 231. Connecting groove; 24. Connecting rod; 25. Blocking plate; 3. Movable telescopic plate; 31. Connecting plate; 32. Movable plate; 33. Movable groove; 4. Fixed block; 41. Movable block; 42. Support rod; 43. Cylinder; 5. High temperature furnace. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0042] like Figure 1 and Figure 2 As shown, a waste heat recovery device for a high-temperature furnace of the present invention comprises a shell 1, an air inlet 11 and a water inlet are provided on the shell 1, a cylindrical heat recovery cylinder 2 is provided in the shell 1, the water inlet is communicated with the inside of the heat recovery cylinder 2 through a water injection assembly, water can be injected into the heat recovery cylinder 2 through the water inlet and the water injection assembly, the flue gas of the high-temperature furnace 5 enters the shell 1 from the air inlet 11, and fully contacts with the outer wall of the heat recovery cylinder 2 in the shell 1, so that the heat recovery cylinder 2 fully absorbs the heat of the flue gas, one end of the shell 1 provided with the air inlet 11 is the air inlet end of the shell 1, and the side facing the air inlet end of the shell 1 is the front side, the water injection port 12 is provided on the rear side of the shell 1, and an air outlet 13 is also provided on the rear side of the shell 1, and the air outlet 13 is connected to an exhaust pipe.

[0043] like Figure 3 and Figure 6 , Figure 8 and Fig. 9 As shown, in order to make the flue gas fully contact with the outer wall of the heat recovery cylinder 2, a partition 21, a blade 22, a push plate 23 and a driving assembly are provided in the shell 1, wherein there are multiple partitions 21, the shape of the partition 21 is consistent with the shape of the inside of the shell 1, and the partition 21 is provided with a circular hole matching the diameter of the heat recovery cylinder 2, the partition 21 is longitudinally arranged in the shell 1, the inner wall of the partition 21 is in contact with the outer wall of the heat recovery cylinder 2, the heat recovery cylinder 2 can be rotated in contact with the partition 21, the outer wall of the partition 21 is fully in contact with the outer wall of the shell 1, each partition 21 is arranged at intervals along the axial direction of the heat recovery cylinder 2, and a smoke channel is formed between two adjacent partitions 21, and a smoke channel is formed between the partition 21 located at the frontmost side and the panel on the front side of the shell 1, and each partition 21 is provided with a connecting port 211, and adjacent smoke channels are connected through the connecting port 211, and the connecting port 211 is located on the upper side of the partition 21.

[0044] A plurality of blades 22 are arranged in any flue gas channel, and the blades 22 in the same flue gas channel are arranged at intervals along the circumferential direction of the outer wall of the heat recovery tube 2, and the blades 22 are fixed to the outer wall of the heat recovery tube 2. A flow cavity is formed between two adjacent blades 22 in the same flue gas channel, and the upper half of the shell 1 forms a semi-cylindrical shape. When the waste heat recovery equipment is working, the flue gas enters the shell 1 from the air inlet 11. The angle of the air inlet 11 can make the flue gas enter the flue gas channel on the front side of the shell 1 along the tangent direction of the heat recovery tube 2. The flue gas contacts the blades 22 to drive the heat recovery tube 2 to rotate. When the flow cavity rotates to the arc-shaped area at the upper end of the shell 1, the side walls of the flow cavity fit with the inner wall of the shell 1, and the inner wall of the shell 1 is used to block the flow cavity, so that a relatively sealed space is formed in the flow cavity. Combining 1 and Figure 4 The upper part of the shell 1 is semi-cylindrical, and the lower part of the shell 1 is a rectangular cavity structure. When the flow cavity rotates to the upper side of the shell 1, the blade 22 contacts the inner wall of the shell, and the flow cavity located in the lower part of the shell 1 is connected to the inside of the shell. The flow cavity described in the present invention cooperates with the inner wall of the shell 1 to form a relatively sealed space, specifically refers to the flow cavity rotated to the upper side of the shell 1. After the flue gas enters the shell 1 from the air inlet 11, the high-temperature flue gas contacts the blade 22 located in the lower part of the shell 1 and drives it to rotate. Since the blade 22 is fixed relative to the heat recovery cylinder 2, the blade 22 further drives the heat recovery cylinder 2 to rotate. In the process of the flue gas passing into the shell 1, the blade 22 rotated to the lower part of the shell 1 is continuously driven to rotate, thereby realizing the operation of continuously driving the blade 22 and the heat recovery cylinder 2 to rotate during the flue gas passing process.

[0045] A push plate 23 is provided in any flow cavity, and the push plate 23 slides against the blade 22 and the outer wall of the heat recovery cylinder 2. A slide groove 221 is provided on the blade 22, and the length direction of the slide groove 221 is parallel to the axial direction of the heat recovery cylinder 2. The push plate 23 is slidably connected to the slide groove 221, and a gap for smoke to pass through is formed at the connection between the push plate 23 and the slide groove 221. Any push plate 23 is connected to a group of driving components. When the flow cavity moves to be opposite to the connecting port 211, the driving component pushes the two push plates 23 on the front and rear sides of the connecting port 211 to move, and the push plate 23 pushes the smoke in the front flow cavity from the connecting port 211 into the rear flow cavity.

[0046] The driving assembly includes two connecting rods 24, one end of the connecting rod 24 is slidably matched with the push plate 23, the end face of the other end of the connecting rod 24 is an arc-shaped tooth surface, and a hinge position is also provided on the connecting rod 24, which can be a circular through hole, and the hinge position is located on the axis of the arc-shaped tooth surface of the connecting rod 24. The hinge position of the connecting rod 24 is hinged to the rear side of the blade 22, and the rear side of the blade 22 can be provided with a hinge shaft, which is inserted into the hinge hole of the connecting rod 24, and the connecting rod 24 can rotate around its hinge position;

[0047] The two connecting rods 24 of the same driving assembly are connected to the same push plate 23. Two connecting grooves 231 are provided on the rear end surface of the push plate 23. The front side of the connecting rod 24 extends into the connecting groove 231 and slides with the connecting groove 231. The front side of the connecting rod 24 can also rotate relative to the connecting groove 231. The spacing between the two connecting rods 24 in the same driving assembly increases from front to back. An annular guide groove 212 is provided on the front end surface of the partition 21. The arc-shaped toothed end surface of the connecting rod 24 extends into the guide groove 212 and slides with the guide groove 212. The tooth surface of the connecting rod 24 is connected to the rack 212. 13, under the meshing action of the rack 213 and the tooth end of the connecting rod 24, the connecting rod 24 rotates around its hinge position, and drives the push plate to slide back and forth in contact with the heat recovery cylinder 2 and the two blades 22. The guide groove 212 is coaxially arranged with the heat recovery cylinder 2. At least two racks 213 are arranged in the guide groove 212. The curvature of the rack 213 is consistent with that of the guide groove 212. The connecting port 211 is located between the two racks 213. The spacing between two adjacent racks 213 is greater than the width of the push plate 23. Only one of the two connecting rods 24 of the same driving assembly is meshed with the rack 213 at the same time.

[0048] After the flue gas enters the shell 1, it contacts the blade 22 and pushes the blade 22 and the heat recovery cylinder 2 to rotate. The partition 21 is fixed relative to the shell 1, with the side facing the rotation direction of the blade 22 and the heat recovery cylinder 2 as the front side. When the blade 22 rotates to be opposite to the rack 213 on the rear side of the connecting port 211, the tooth ends of the two connecting rods 24 hinged to the blade 22 contact the rack 213 and mesh with the rack 213. When the blade 22 continues to move, under the meshing action of the rack 213, the two connecting rods 24 rotate around the hinge with the blade 22, connecting the same The two connecting rods 24 of a blade 22 belong to two groups of driving components, and the inclination directions of the two connecting rods 24 are symmetrically arranged with respect to the blade 22. When the two connecting rods 24 contact the rack 213, their tooth ends rotate in the same direction, and the connecting rod 24 located at the front side drives the push plate 23 connected thereto to move toward the direction close to the rear baffle 21 thereof, and squeezes the space of the flow cavity, so that the smoke in the flow cavity enters the rear flow cavity through the connecting port 211, and the connecting rod 24 located at the rear side drives the push plate 23 connected thereto to move toward the direction away from the rear baffle 21 thereof;

[0049] During the continuous rotation of the blade 22 and the heat recovery drum 2, the blade 22 located at the front side of the blade 22 mentioned above moves to be opposite to the rack 213 at the front side of the connecting port 211, and the tooth ends of the two connecting rods 24 hinged to the blade 22 are meshed with the rack 213. The tooth ends of the two connecting rods 24 rotate in the same direction under the meshing action of the rack 213, and the two push plates 23 connecting the two connecting rods 24 move in the opposite direction, that is, the two connecting rods 24 connected to the same push plate 23 are meshed with the two racks 213 at intervals, and Because the two connecting rods 24 connected to the same push plate 23 have different inclination directions, the two connecting rods 24 drive the push plates 23 connected thereto to move in opposite directions during the same-direction rotation. With the cooperation of the connecting rods 24 and the rack 213, the push plate 23 moves toward the direction of the partition 21 when passing through the connecting port 211 on the rear partition 21, and squeezes the smoke into the flow cavity on the rear side. When it rotates to be misaligned with the connecting port 211, it is reset away from the partition 21 under the meshing action of the other rack 213.

[0050] After the flue gas enters the rear flow chamber from the connecting port 211, the flow chamber continues to rotate until it is misaligned with the connecting port 211, and after the flow chamber and the connecting port 211 are misaligned, the push plate 23 moves back and forth in the flow chamber to reset, and the flue gas passes through the gap between the push plate 23 and the blade 22, and moves from the front side of the push plate 23 to the rear side of the push plate 23. Under the action of the push plate 23, the flue gas in the front flue gas channel is pushed into the rear flue gas channel in turn, so that the flue gas flows along the circumferential direction of the heat recovery cylinder 2 while also moving along the axial direction of the heat recovery cylinder 2, so as to ensure sufficient heat exchange between the flue gas and the water body in the heat recovery cylinder 2, thereby improving the heat recovery efficiency of the flue gas, and the increase in the temperature of the water body in the heat recovery cylinder 2 is relatively balanced.

[0051] Because the flue gas also contains a certain amount of dust or particulate matter, during the long-term operation of the waste heat recovery equipment, the dust or particulate matter contained in the flue gas adheres to the outer wall of the heat recovery cylinder 2, which will affect the heat conduction effect of the heat recovery cylinder 2, and then affect the heat exchange efficiency. When the push plate 23 moves in contact with the side wall of the heat recovery cylinder 2, it can scrape off the particulate matter attached to the surface of the heat recovery cylinder 2 to ensure the heat exchange efficiency of the waste heat recovery equipment.

[0052] like Figure 4 and Figure 5As shown, the heat recovery cylinder 2 is further provided with an adjustment mechanism, which includes a movable telescopic plate 3, a connecting plate 31, a movable plate 32, a movable groove 33 and a supporting assembly. There are multiple movable telescopic plates 3, and the length direction of each movable telescopic plate 3 is parallel to the axial direction of the heat recovery cylinder 2. The axial ends of the heat recovery cylinder 2 are rotatably connected with a blocking plate 25, and the length ends of each movable telescopic plate 3 are abutted against the two blocking plates 25. The width of the movable telescopic plate 3 is adjustable. Specifically, the movable telescopic plate 3 can be composed of two plate bodies overlapped in the width direction, one of which is provided with a groove, and the other plate body extends into the groove. The two plates slide in the middle and fit the groove body. When the two plates slide relative to each other, the overlapping width changes, thereby changing the overall width of the movable telescopic plate 3. One length side of the movable telescopic plate 3 is used as a fixed side, and the other length side is used as a movable side. The length sides of two adjacent movable telescopic plates 3 are rotatably connected, and the fixed sides of adjacent movable telescopic plates 3 are not connected to the movable sides. The width direction of the connecting plate 31 is opposite to the radial direction of the heat recovery cylinder 2, and the side facing the inner wall of the heat recovery cylinder 2 is the outer side. The outer side of the connecting plate 31 is rotatably connected to the fixed side of the movable telescopic plate 3, and the outer side of the connecting plate 31 is connected to the inner wall of the heat recovery cylinder 2. The inner walls are abutted, and two adjacent connecting plates 31 and the two movable telescopic plates 3 between the two connecting plates 31 form a relatively independent water storage chamber. The width direction of the movable plate 32 is opposite to the radial direction of the heat recovery cylinder 2. The outer side of the movable plate 32 is rotatably connected to the movable edge of the movable telescopic plate 3. A movable groove 33 is provided between the two adjacent connecting plates 31. The number of the movable grooves 33 is the same as that of the movable plates 32. Each movable plate 32 is slidably connected to each movable groove 33 one by one. The two side walls of each movable groove 33 are fixed to the adjacent connecting plates 31 through an arc plate. The movable plate 32 extends from the outer side of the movable groove 33 and The movable groove 33 slides in contact with the supporting assembly, which extends into the movable groove 33 from the inner side of the movable groove 33 and abuts against the movable plate 32 in the movable groove 33 to change the depth of the movable plate 32 extending into the movable groove 33, thereby adjusting the space size of each water storage chamber to achieve the regulation of the water amount in the heat recovery cylinder 2, and the water body in the heat recovery cylinder 2 is not affected by the water amount and keeps in contact with the side wall of the heat recovery cylinder 2, so that in actual work, different amounts of water can be injected into the heat recovery cylinder 2 according to the amount of flue gas and the difference in flue gas temperature, so that the water body can be heated to the preset temperature after recovering the waste heat.

[0053] The support assembly includes a fixed block 4, a movable block 41 and a support member. The fixed block 4 is fixed to the front side blocking plate 25, and the movable block 41 is movably connected to the rear side blocking plate 25. The movable block 41 can move relative to the blocking plate 25 along the axial direction of the heat recovery cylinder 2. The movable block 41 is connected to a driving member, and the driving member drives the movable block 41 to move, wherein the driving member can be a cylinder 43. There are multiple groups of support members, and the number of support members is consistent with the number of movable plates 32. One group of support members includes two support rods 42, and the two support rods 42 are respectively hinged to the fixed block 4 or the movable block 41 through one end of their length, and the length of the two support rods 42 The other end is hinged, and the connecting ends of the two support rods 42 extend into the movable groove 33 from the inner side of the movable groove 33 and abut against the movable plate 32 in the movable groove 33. When the driving member drives the movable block 41 to move, the distance between the fixed block 4 and the movable block 41 can be changed, and the position of the support rod 42 extending into the movable groove 33 can be changed. During the water injection process, water enters each water storage chamber and squeezes the movable telescopic plate 3 to extend. When the movable telescopic plate 3 extends, it pushes the movable plate 32 connected thereto to slide in the movable groove 33. After the movable plate 32 moves to abut against the support rod 42, the support rod 42 blocks the movement of the movable plate 32.

[0054] like Figure 3 As shown, a water injection assembly is also provided on the shell 1, and the water injection assembly includes a water injection port 12, a water injection channel and an impeller 15. The water injection port 12 is connected to a water pipe and a pump body, and the pump body pumps water from the water pipe into the water injection port 12. The water injection port 12 is installed on the shell 1, and the water injection channel is located between the rear side wall of the shell 1 and the rear side blocking plate 25. The rear side blocking plate 25 is provided with a water inlet, and there are multiple water inlets, each water inlet is opposite to each water storage cavity one by one, and is connected to the inside of the water storage cavity. The water injection port 12 is connected to the shell 1 through a connecting tube 14, one end of the connecting tube 14 is fixed to the water injection port 12, and the other end of the connecting tube 14 is fixed to the shell 1, and the barrel length of the connecting tube 14 is adapted to the water injection port 12 and the housing 1 change. Specifically, the connecting tube 14 can be composed of two movable sleeve cylinders. The fixed end of the driving member can be connected to the outer wall of the housing 1, and the extended end of the driving member can be connected to the connecting tube 14. The extending direction of the driving member is parallel to the axial direction of the connecting tube 14. When the extended end of the driving member is extended or retracted, the length of the connecting tube 14 is driven to change. The impeller 15 and the water injection port 12 are relatively fixed in the axial direction of the water injection port 12. When the length of the connecting tube 14 changes, the distance between the water injection port 12 and the housing 1 is driven to change, and then the movable block 41 is driven to move through the impeller 15 and the connecting rod 16 to adjust the depth of the support rod 42 extending into the movable groove 33.

[0055] The impeller 15 is connected to the movable block 41 through the connecting rod 16. The impeller 15 extends into the water injection port 12. When water enters the water injection port 12 and contacts the impeller 15, the impeller 15 is pushed to rotate. When the impeller 15 rotates, the connecting rod 16 is driven to rotate synchronously. The connecting rod 16 further drives the sealing plate 25 to rotate through the movable block 41. The two sealing plates 25 are relatively fixed in the circumferential direction by the supporting assembly. When the sealing plate 25 rotates, each water storage chamber rotates relative to the heat recovery cylinder 2, which can improve the balance of water entering each water storage chamber during the water injection process.

[0056] The waste heat recovery equipment provided by the present invention can make the flue gas fully contact with the outer wall of the heat recovery cylinder and fully exchange heat with the water body in the heat recovery cylinder, thereby improving the recovery efficiency of the waste heat in the flue gas. In addition, by adjusting the amount of water in the heat recovery cylinder, the appropriate volume of water can be better adapted according to the flue gas volume and flue gas temperature, thereby improving the flexibility of the use of the waste heat recovery equipment.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waste heat recovery device for a high-temperature furnace, comprising a shell (1), a partition (21) arranged in the shell (1), and a heat recovery cylinder (2), wherein a plurality of blades (22) are fixed at intervals in the circumferential direction on the outer side of the heat recovery cylinder (2), and an air inlet (11) is provided on the shell (1), and high-temperature flue gas introduced through the air inlet (11) pushes the blades (22) to drive the heat recovery cylinder (2) to rotate, characterized in that: There are a plurality of partitions (21), each of the partitions (21) is fixed in the shell (1) at intervals along the axial direction of the heat recovery cylinder (2), each of the partitions (21) is sleeved on the outside of the heat recovery cylinder (2), a flue gas channel is formed between adjacent partitions (21), each of the partitions (21) is provided with a communication port (211), and each of the blades (22) is evenly arranged in the circumferential direction in each flue gas channel; The waste heat recovery device also includes a push plate (23) and a drive assembly; The push plate (23) is arranged between two circumferentially adjacent blades (22), with the side of the housing (1) where the air inlet (11) is arranged being the front side. The driving assembly drives the push plate (23) to slide forward and backward in contact with the blades (22) on both sides thereof, so that the push plate (23) has two states: state one: when the push plate (23) moves to be opposite to the connecting port (211), it moves toward the rear side to push the high-temperature flue gas from the connecting port (211) into the rear flue gas channel; state two: when the push plate (23) passes over the connecting port (211), it moves toward the front side.

2. The waste heat recovery device for a high temperature furnace according to claim 1, characterized in that: The driving assembly comprises two connecting rods (24), one end of the connecting rod (24) is slidably matched with the push plate (23), the end surface of the other end of the connecting rod (24) is in the shape of an arc-shaped tooth surface, and a hinge position is also provided on the connecting rod (24), and the hinge position of the connecting rod (24) is located on the axis of the tooth surface of the connecting rod (24), and the distance between the two connecting rods (24) in the same driving assembly increases from front to back; An annular guide groove (212) is provided on the front side of the partition (21), at least two racks (213) are provided in the guide groove (212), the communication port (211) is located between the two racks (213), the spacing between two adjacent racks (213) is greater than the width of the push plate (23), the tooth surface of the connecting rod (24) is slidably matched with the guide groove (212), the hinge position of the connecting rod (24) is hinged to the rear side of the blade (22), and when the tooth surface of the connecting rod (24) contacts the rack (213), the connecting rod (24) rotates around its hinge position.

3. The waste heat recovery device for a high temperature furnace according to claim 2, characterized in that: Two connecting grooves (231) are provided on the rear end surface of the push plate (23), the end of the connecting rod (24) extends into the connecting groove (231) and is slidably connected to the connecting groove (231), and the end of the connecting rod (24) rotates relative to the connecting groove (231).

4. The waste heat recovery device for a high temperature furnace according to claim 2, characterized in that: The blade (22) is provided with a slide groove (221), the length direction of the slide groove (221) is parallel to the axial direction of the heat recovery cylinder (2), the push plate (23) is slidably connected to the slide groove (221), and a gap is formed at the connection between the push plate (23) and the slide groove (221).

5. The waste heat recovery device for a high temperature furnace according to claim 1, characterized in that: The heat recovery cylinder (2) is also provided with an adjustment mechanism, the adjustment mechanism comprising a movable telescopic plate (3), a connecting plate (31), a movable plate (32) and a support assembly. There are a plurality of movable telescopic plates (3), two adjacent movable telescopic plates (3) are rotatably connected and form a water storage cavity for storing water with the side wall of the heat recovery cylinder (2). The connecting plate (31) is rotatably connected to the movable telescopic plate (3) on one side facing the side wall of the heat recovery cylinder (2) and abuts against the inner wall of the heat recovery cylinder (2). A movable groove (33) is provided between two adjacent connecting plates (31). The outer side of the movable plate (32) is rotatably connected to the movable telescopic plate (3). Each movable plate (32) extends into each movable groove (33) and is slidably connected to the movable groove (33). When the movable plate (32) slides relative to the movable groove (33), the size of the water storage cavity changes. The support assembly extends into the movable groove (33) and abuts against the movable plate (32).

6. The waste heat recovery device for a high temperature furnace according to claim 5, characterized in that: The support assembly comprises a fixed block (4), a movable block (41) and a support member. The heat recovery cylinder (2) is provided with sealing plates (25) at both axial ends. The fixed block (4) is fixed relative to the front sealing plate (25). The movable block (41) is movably connected to the rear sealing plate (25). The movable block (41) is connected to a driving member, and the driving member drives the movable block (41) to move. There are multiple groups of support members, and each group of support members is arranged along the circumference of the heat recovery cylinder (2). One group of support members comprises two support rods (42). The two support rods (42) are respectively hinged to the movable block (41) or the fixed block (4) through one end thereof. The other ends of the two support rods (42) are hinged. The connecting ends of the two support rods (42) extend into the movable groove (33) and abut against the movable plate (32).

7. The waste heat recovery device for a high temperature furnace according to claim 6, characterized in that: The movable block (41) is movably connected to the blocking plate (25); the driving member is a cylinder (43); and the protruding end of the driving member is fixed relative to the movable block (41).

8. The waste heat recovery device for a high temperature furnace according to claim 7, characterized in that: The shell (1) is also provided with a water injection assembly, the water injection assembly comprising a water injection port (12) and a water injection channel, the water injection port (12) being mounted on the shell (1), the water injection channel being arranged between the rear side wall of the shell (1) and the rear side blocking plate (25), the rear side blocking plate (25) being provided with a water inlet, the water inlets being multiple, and each of the water inlets being in one-to-one communication with each of the water storage chambers.

9. The waste heat recovery device for a high temperature furnace according to claim 8, characterized in that: The water injection port (12) is connected to the shell (1) via a connecting tube (14); the length of the connecting tube (14) is adapted to the change in the spacing between the water injection port (12) and the shell (1); the protruding end of the driving member is connected to the connecting tube (14); the driving member pushes the end of the connecting tube (14) connected to the water injection port (12) to move closer to or farther from the shell (1); the blocking plate (25) is rotatably connected to the heat recovery cylinder (2); and the movable block (41) is circumferentially fixed to the blocking plate (25) at the rear side; The water injection assembly further comprises an impeller (15) and a connecting rod (16); the impeller (15) is connected to the movable block (41) via the connecting rod (16); the impeller (15) extends into the water injection port (12); and the impeller (15) moves synchronously with the water injection port (12).

10. The waste heat recovery device for a high temperature furnace according to claim 8, characterized in that: The water injection port (12) is connected to a water pipe and a pump body, and the pump body pumps water from the water pipe into the water injection port (12).

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