Kiln waste heat utilization device and energy-saving type kiln

Abstract

The invention relates to the field of kilns, in particular to a kiln waste heat utilization device and an energy-saving kiln, the waste heat utilization device comprises an outer heat preservation shell, a heat preservation layer, a heat preservation layer and a heat preservation layer, the outer heat preservation shell is in a straight tunnel shape with openings formed in the two ends, and a cavity of the kiln is formed in the outer heat preservation shell; the inner heat preservation shell is in a straight tunnel shape with openings formed in the two ends, the inner heat preservation shell is arranged on the inner side of the outer heat preservation shell, a preheating section of the kiln is located above the inner heat preservation shell, and a combustion section and a cooling section of the kiln are located in the inner heat preservation shell; the top of the inner heat preservation shell communicates with the upper portion of the inner heat preservation shell and the interior of the outer heat preservation shell through a top communicating pipe, and a gap is formed between the outer wall of the inner heat preservation shell and the inner wall of the outer heat preservation shell. The waste heat utilization efficiency can be improved, the equipment cost is reduced, meanwhile, hot air in the outer heat preservation shell also plays a role in heat insulation, and heat loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of kilns, and more particularly to a kiln waste heat utilization device and an energy-saving kiln. Background Technology

[0002] As a core thermal equipment that uses the heat generated by fuel combustion or electrical energy conversion to heat, roast, melt, and heat treat materials, the development of kilns is deeply intertwined with the progress of human civilization and industrial technological innovation. They are widely used in many key industrial fields such as ceramics, building materials, metallurgy, chemicals, and glass, and are the basic equipment for promoting material processing and industrial production.

[0003] Currently, energy-saving technologies for kilns mainly focus on combustion technology and waste heat utilization technology. The principle of waste heat utilization technology is to collect air from the combustion and cooling zones through pipelines and transport it to the waste heat zone. Since kilns can be tens or even hundreds of meters long, the pipelines for transporting hot air are quite long, and heat loss inevitably occurs during the transport of hot air, resulting in low waste heat utilization efficiency. Therefore, this application proposes a waste heat utilization device for kilns and an energy-saving kiln. Summary of the Invention

[0004] The purpose of this invention is to provide a kiln waste heat utilization device and an energy-saving kiln to solve the problem of low waste heat utilization rate in current kilns.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A waste heat utilization device for kilns, the waste heat utilization device comprising:

[0007] The outer insulation shell is a straight tunnel shape with openings at both ends, and the kiln chamber is located inside the outer insulation shell;

[0008] The inner insulation shell is a straight tunnel shape with openings at both ends. The inner insulation shell is located inside the outer insulation shell. The preheating section of the kiln is located above the inner insulation shell. The combustion section and cooling section of the kiln are located inside the inner insulation shell. The top of the inner insulation shell is connected to the top of the inner insulation shell and the interior of the outer insulation shell through a top connecting pipe. There is a gap between the outer wall of the inner insulation shell and the inner wall of the outer insulation shell.

[0009] Furthermore, the waste heat recovery device also includes:

[0010] Two air guide plates, each U-shaped, are disposed inside the inner insulation shell. The openings of the two air guide plates are opposite to each other. A gap is provided between the air guide plates and the inner wall of the inner insulation shell. The top connecting pipe is located between the two air guide plates.

[0011] Furthermore, the waste heat recovery device also includes:

[0012] An air equalization plate is located between the upper roller and the inner insulation shell. The air discharged from the top connecting pipe first blows towards the air equalization plate, and after being equalized at the air equalization plate, it blows towards the upper roller.

[0013] Furthermore, the wind distribution plate includes an upper arc plate and a lower arc plate. Both the upper arc plate and the lower arc plate are elongated strip structures with an arc-shaped cross-section. The arc-shaped openings of the upper arc plate and the lower arc plate are arranged opposite each other, and the upper arc plate and the lower arc plate are staggered. The upper arc plate and the lower arc plate are arranged in an array, and the distance between adjacent upper arc plates is smaller than the width of the lower arc plate.

[0014] Furthermore, including the aforementioned waste heat utilization device for the kiln, the combustion section and cooling section of the kiln are located inside the inner insulation shell, the preheating section of the kiln is located above the inner insulation shell and inside the outer insulation shell, the inlet and outlet positions of the kiln are located at the same end of the outer insulation shell, and the outer insulation shell is closed off away from the outlet position. The kiln also includes:

[0015] The lower roller and the upper roller are arranged in a linear array inside the outer insulation shell. The lower roller passes through the outer insulation shell and the inner insulation shell. The upper roller passes through the outer insulation shell and is located outside the inner insulation shell. A roller drive mechanism for driving the lower roller and the upper roller to rotate is provided outside the outer insulation shell.

[0016] A burner, which is fixedly connected to the interior of the outer insulation shell, has a nozzle located thereon that passes through the side wall of the inner insulation shell and is disposed in the combustion section area within the inner insulation shell;

[0017] Cooling pipes, wherein the cooling pipes are installed in the cooling section on the outer insulation shell, are used to cool the material located in the cooling section;

[0018] The lifting mechanism includes a lifting bracket and a power mechanism. The power mechanism is located outside the outer insulation shell. The power mechanism drives the lifting bracket to move up and down inside the outer insulation shell, and the lifting bracket feeds the material on the upper roller onto the lower roller.

[0019] Furthermore, the air inlet pipe of the burner is located between the outer insulation shell and the inner insulation shell, and multiple heating fins are provided on the air inlet pipe.

[0020] Furthermore, the lifting mechanism includes:

[0021] A lifting support is provided, on which lifting rollers are rotatably connected. The lifting rollers are arranged in an array, and the distribution of the lifting rollers is the same as that of the lower rollers. A drive wheel is also rotatably connected to the inner wall of the outer insulation shell. The drive wheel is located on the upper and lower sides of the lifting support. When the lifting rollers are at the same level as the lower rollers or the upper rollers, the drive wheel is tangent to the lifting rollers and drives them to rotate. The drive wheel is driven to rotate by a roller drive mechanism installed externally.

[0022] A lifting rod, one end of which is fixedly connected to the lifting bracket, the lifting rod passing through the outer insulation shell above the lifting bracket, and a lifting plate fixedly connected to the end of the lifting rod away from the lifting bracket;

[0023] A power mechanism is fixedly connected to the outer insulation shell. The power mechanism is used to drive the lifting plate to rise and fall, thereby driving the lifting bracket to rise and fall.

[0024] Furthermore, the lifting mechanism includes:

[0025] Telescopic module;

[0026] A lifting support plate is connected to a lifting plate, and a telescopic module is connected to the outer insulation shell. The end of the telescopic module is connected to the lifting support plate, and the telescopic module is used to control the lifting and lowering of the lifting support plate.

[0027] Furthermore, the lifting support plate is fixedly connected to the output end of the power mechanism, the lifting support plate is arranged parallel to the lifting plate, the lifting support plate is provided with a guide shaft, the guide shaft passes through the lifting plate and is slidably connected to the lifting plate, and the lifting mechanism further includes:

[0028] A compression spring is located between the lifting support plate and the lifting plate. The compression spring is in a compressed state, and the lifting support plate supports the lifting plate.

[0029] Furthermore, the energy-saving kiln also includes:

[0030] A heat dissipation mechanism is installed on the lifting support plate, and the heat dissipation mechanism drives airflow through the compression spring.

[0031] In summary, the present invention has the following advantages compared with the prior art:

[0032] This invention discloses a kiln waste heat utilization device. This device consists of an inner insulation shell for the combustion and cooling sections, and an outer insulation shell outside the inner insulation shell. The kiln preheating section is placed inside the outer insulation shell. A gap exists between the inner and outer insulation shells. During kiln operation, the hot air inside the inner insulation shell is directly discharged into the outer insulation shell to preheat the materials, reducing heat loss. This eliminates the need for piping, improves waste heat utilization efficiency, and reduces equipment costs. Furthermore, the hot air inside the outer insulation shell also acts as insulation, further reducing heat loss. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the kiln waste heat utilization device disclosed in Embodiment 1 of the present invention.

[0034] Figure 2 This is an exploded view of the kiln waste heat utilization device disclosed in Embodiment 1 of the present invention.

[0035] Figure 3 for Figure 2 A magnified view of a section at point I.

[0036] Figure 4 This is a front view of the kiln waste heat utilization device disclosed in Embodiment 1 of the present invention.

[0037] Figure 5 for Figure 4 Sectional view of AA.

[0038] Figure 6 This is a schematic diagram of the structure of the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0039] Figure 7 This is an exploded view of the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0040] Figure 8 This is a front view of the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0041] Figure 9 for Figure 8 A cross-sectional view of BB.

[0042] Figure 10 for Figure 8 A sectional view of CC.

[0043] Figure 11 This is a schematic diagram of the lifting mechanism in the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0044] Figure 12 This is an exploded view of the heat dissipation mechanism in the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0045] Figure 13 This is a schematic diagram showing the connection of the internal components of the heat dissipation mechanism in the energy-saving kiln disclosed in Embodiment 2 of the present invention.

[0046] Figure label:

[0047] 100. Outer insulation shell; 101. Side insulation wall; 102. Insulation top; 103. Insulation bottom plate; 104. Insulation pipe; 110. Lower roller; 120. Outer fixed shell; 121. Fixed support lug; 130. Rear insulation plate; 140. Roller drive mechanism; 200. Inner insulation shell; 201. Air guide plate; 202. Top connecting pipe; 203. Support bar; 300. Upper roller; 310. Air distribution plate; 311. Upper arc plate; 312. Lower arc plate; 400. Burner; 410. Mixing pipe; 420. Nozzle; 430. Air inlet pipe; 440. Heating fins; 500. Heat conduction pipe; 510. Main pipe; 520. Branch pipe; 600. Lifting mechanism; 610. Lifting bracket; 611. Lifting roller; 612. Roller bracket; 613. Drive wheel; 614. Power rod; 615. Lower connecting pipe; 620. Lifting rod; 630. Lifting plate; 631. Upper connecting pipe; 632. Guide sleeve; 640. Power mechanism; 641. Telescopic module; 642. Lifting support plate; 643. Guide shaft; 644. Compression spring; 700. Heat dissipation mechanism; 710. Heat dissipation shell; 711. End cover; 720. Connecting shaft; 730. Drive gear; 740. Driven shaft; 750. Ratchet module; 760. Snap ring; 770. Fan blade mechanism; 780. Speed ​​increaser. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 1 and Figure 5 As shown, an embodiment of the present invention provides a kiln waste heat utilization device, the waste heat utilization device comprising:

[0051] The outer insulation shell 100 is a straight tunnel shape with openings at both ends, and the kiln chamber is located inside the outer insulation shell 100.

[0052] The inner insulation shell 200 is a straight tunnel shape with openings at both ends. The inner insulation shell 200 is located inside the outer insulation shell 100. The preheating section of the kiln is located above the inner insulation shell 200. The combustion section and cooling section of the kiln are located inside the inner insulation shell 200. The top of the inner insulation shell 200 is connected to the top of the inner insulation shell 200 and the interior of the outer insulation shell 100 through a top connecting pipe 202. There is a gap between the outer wall of the inner insulation shell 200 and the inner wall of the outer insulation shell 100.

[0053] In this embodiment, the outer insulation shell 100 is the outer insulation layer of the kiln, and the inner insulation shell 200 is the inner insulation layer. The lower roller 110 of the kiln is disposed inside the inner insulation shell 200, and the upper roller 300 is disposed above the inner insulation shell 200. The kiln is a double-layer kiln, with an inlet and outlet at its open end and a lifting mechanism 600 at its closed end for driving the upper material into the lower layer. During feeding, the material is conveyed into the kiln by the upper roller 300 and then... The lifting mechanism 600 feeds the combustion section and cooling section located inside the inner insulation shell 200. Since the interior of the inner insulation shell 200 is connected to the preheating section located above it, hot air from the combustion and cooling sections enters the preset chamber through the top connecting pipe 202. The material in the preheating section is first preheated and then fed into the combustion section by the lifting mechanism 600. The material in the combustion section is fed into the cooling section by the lower roller 110. Because the preheating section is located above the combustion and cooling sections, and both... The combustion and cooling sections are directly connected via the top connecting pipe 202, allowing hot air from both the combustion and preheating sections to be supplied to the preheating section, eliminating the need for pipe transmission. No heat loss occurs during the process of hot air entering the preheating section. Furthermore, since both the combustion and cooling sections are located within the inner insulation shell 200, the combustion section is necessarily closer to the closed end, and the cooling section is necessarily closer to the feed inlet (the feed inlet and outlet are located at the same end of the outer insulation shell 100). The material preheating process is a step-by-step preheating, which reduces the cold stimulation on the material and prevents damage caused by sudden temperature rise. Since there is a gap between the outer insulation shell 100 and the inner insulation shell 200, the preheated hot air fills the gap between the outer insulation shell 100 and the inner insulation shell 200, forming a hot air layer with a certain heat insulation effect between the outer insulation shell 100 and the inner insulation shell 200, which improves the heat preservation effect of the kiln and further improves the utilization rate of waste heat.

[0054] This invention discloses a kiln waste heat utilization device. This device consists of an inner insulation shell 200 for the combustion and cooling sections, and an outer insulation shell 100 outside the inner insulation shell 200. The kiln preheating section is placed inside the outer insulation shell 100. A gap exists between the inner insulation shell 200 and the outer insulation shell 100. During kiln operation, the hot air inside the inner insulation shell 200 is directly discharged into the outer insulation shell 100 to preheat the materials, reducing heat loss. This eliminates the need for piping, improves waste heat utilization efficiency, and reduces equipment costs. Furthermore, the hot air inside the outer insulation shell 100 also acts as insulation, further reducing heat loss.

[0055] Specifically, in this embodiment, such as Figure 2 As shown, the outer insulation shell 100 includes a side insulation wall 101, an insulation top 102, and an insulation bottom plate 103. The side insulation wall 101, insulation top 102, and insulation bottom plate 103 are the insulation walls of kilns in the prior art. For example, the side insulation wall 101, insulation top 102, and insulation bottom plate 103 are made of refractory bricks. The side insulation wall 101 is vertically arranged and located on both sides of the inner insulation shell 200. The insulation top 102 is an arc-shaped top, and the insulation bottom plate 103 is a straight bottom plate. The side insulation wall 101, the insulation top 102, and the insulation bottom plate 103 form a tunnel-shaped structure.

[0056] The inner insulation shell 200 is a tunnel-shaped structure made of refractory bricks.

[0057] Preferably, the inner insulation shell 200 is fixed to the interior of the outer insulation shell 100 by a support structure (such as a support frame or support base made of high-temperature resistant material, such as a support bar 203, which is disposed at the bottom of the inner insulation shell 200), and both the upper and lower sides of the inner insulation shell 200 are arc-shaped.

[0058] In a preferred embodiment of this invention, the waste heat utilization device further includes two air guide plates 201. Each air guide plate 201 is U-shaped and is disposed inside the inner insulation shell 200. The openings of the two air guide plates 201 are opposite to each other. A gap is provided between the air guide plates 201 and the inner wall of the inner insulation shell 200. The top connecting pipe 202 is located between the two air guide plates 201. Hot air located in the upper part of the inner insulation shell 200 is discharged from the top connecting pipe 202 into the outer side of the inner insulation shell 200. Half of the hot air enters the gap between the air guide plate 201 and the inner insulation shell 200 from between the two top connecting pipes 202, and then exits from the top connecting pipe 202 into the outside of the inner insulation shell 200. The hot air entering between the air guide plate 201 and the inner insulation shell 200 further insulates the heat, reduces the escape of air from the sides of the outer insulation shell 100 and the inner insulation shell 200, and uses the hot air to form a heat insulation layer, thereby further utilizing the waste heat and reducing heat loss. The air guide plate 201 is fixedly connected to the inside of the inner insulation shell 200 by ceramic anchor rods.

[0059] The top connecting pipe 202 is a ceramic pipe, and the top connecting pipe 202 is embedded inside the inner insulation shell 200.

[0060] As a preferred embodiment of this invention, the waste heat utilization device further includes an air distribution plate 310, which is located between the upper roller 300 and the inner insulation shell 200. The air discharged from the top connecting pipe 202 first blows towards the air distribution plate 310, and after being homogenized at the air distribution plate 310, it blows towards the upper roller 300, thereby enabling the hot air blown towards the upper roller 300 to be evenly blown towards the material.

[0061] Preferably, the air distribution plate 310 includes an upper arc plate 311 and a lower arc plate 312. Both the upper arc plate 311 and the lower arc plate 312 are elongated structures with an arc-shaped cross-section. The arc-shaped openings of the upper arc plate 311 and the lower arc plate 312 are arranged opposite each other and are staggered. The upper arc plates 311 and the lower arc plates 312 are arranged in an array. The distance between adjacent upper arc plates 311 is smaller than the width of the lower arc plate 312. Air discharged from the top connecting pipe 202 blows towards the upper arc plate 311, is blocked by the upper arc plate 311, blows towards the lower arc plate 312, and is discharged from the gap between adjacent upper arc plates 311, thereby forming multiple parallel air walls. The formed air walls are perpendicular to the material's forward direction, thus uniformly preheating the material as it moves forward.

[0062] The ends of the upper arc plate 311 and the lower arc plate 312 are embedded in the inner wall of the outer insulation shell 100.

[0063] Example 2

[0064] As another embodiment of the present invention, such as Figures 6 to 10 As shown, this embodiment discloses an energy-saving kiln, which includes the kiln waste heat utilization device described in Embodiment 1. The combustion section and cooling section of the kiln are located inside the inner insulation shell 200, and the preheating section of the kiln is located above the inner insulation shell 200 and inside the outer insulation shell 100. The feeding and discharging positions of the kiln are located at the same end of the outer insulation shell 100, and the outer insulation shell 100 is closed off away from the discharging position. The kiln also includes:

[0065] The lower roller 110 and the upper roller 300 are arranged in a linear array inside the outer insulation shell 100. The lower roller 110 penetrates the outer insulation shell 100 and the inner insulation shell 200. The upper roller 300 penetrates the outer insulation shell 100 and is located outside the inner insulation shell 200. A roller drive mechanism 140 for driving the lower roller 110 and the upper roller 300 to rotate is provided on the outside of the outer insulation shell 100.

[0066] The burner 400 is fixedly connected to the interior of the outer insulation shell 100, and the nozzle 420 located thereon passes through the side wall of the inner insulation shell 200 and is disposed in the combustion section area inside the inner insulation shell 200.

[0067] Cooling pipes (not shown in the figure) are installed in the cooling section on the outer insulation shell 100 and are used to cool the material located in the cooling section;

[0068] A lifting mechanism 600 is provided, which is equipped with a lifting bracket 610 and a power mechanism 640. The power mechanism 640 is located outside the outer insulation shell 100. The power mechanism 640 drives the lifting bracket 610 to move up and down inside the outer insulation shell 100. The lifting bracket 610 feeds the material on the upper roller 300 onto the lower roller 110.

[0069] Specifically, in this embodiment, the lower roller 110, the upper roller 300, and the roller drive mechanism 140 are all structures of kilns in the prior art. An outer fixed shell 120 is provided on the outside of the outer insulation shell 100. The outer fixed shell 120 is a steel shell. The connection method between the lower roller 110 and the outer fixed shell 120 is the prior art. The end of the lower roller 110 away from the feed is closed by the rear insulation plate 130. The rear insulation plate 130 is made of refractory bricks. The rear insulation plate 130 and the lower roller 110 are fixedly connected.

[0070] The roller drive mechanism 140 drives the lower roller 110 and the upper roller 300 to rotate. The roller drive mechanism 140 is fixedly connected to the outside of the outer fixed shell 120. If the roller drive mechanism 140 is a sprocket structure, the ends of the lower roller 110 and the upper roller 300 are also provided with sprockets. The roller drive mechanism 140 drives the lower roller 110 and the upper roller 300 to rotate synchronously through the sprocket structure, thereby controlling the material to enter from the feed port and be conveyed along the preheating section to the lifting mechanism 600. Then, the lifting mechanism 600 sends the material into the combustion section, and the lower roller 110 sends it into the cooling section, and then it is sent out from the discharge port.

[0071] In this embodiment, the burner 400 is a prior art technology, such as... Figure 3 As shown, the burner 400 includes a mixing pipe 410, a nozzle 420, an air inlet pipe 430, and heating fins 440. The mixing pipe 410 is fixedly connected to the outer fixed shell 120. Both the mixing pipe 410 and the air inlet pipe 430 are located between the outer insulation shell 100 and the inner insulation shell 200. Multiple heating fins 440 are provided, and the multiple heating fins 440 are arranged in parallel on the air inlet pipe 430. The heating fins 440 are used to increase the air inlet pipe. The contact area between the 430 and the hot air is increased to heat the air. Both the mixing pipe 410 and the air inlet pipe 430 have interfaces on the outside of the outer insulation shell 100. The gas is connected to the mixing pipe 410 and the air is connected to the air inlet pipe 430. The air and gas are mixed in the mixing pipe 410. The mixed gas and air are sprayed into the inside of the inner insulation shell 200 from the nozzle 420. The nozzle 420 is also provided with an ignition structure for igniting the mixed gas.

[0072] The heating fin 440 is made of metal disc material and is fixedly connected to the air intake pipe 430 by welding.

[0073] It should be noted that although the feed inlet and the discharge outlet are located at the same end of the outer insulation shell 100, they are not located in the same position. The feed inlet is located above and the discharge outlet is located below, or the length of the preheating section is less than the sum of the lengths of the combustion section and the cooling section, thereby causing the discharge outlet and the feed inlet to be staggered.

[0074] The cooling pipes are installed on the outer fixed housing 120 and are used to supply cooling medium to the cooling section.

[0075] In a preferred embodiment of this invention, the energy-saving kiln further includes a heat-conducting pipe 500, which includes a main pipe 510 and branch pipes 520. The branch pipes 520 are bends and are connected to the insulation top 102. Multiple branch pipes 520 are provided. The main pipe 510 is connected to the branch pipes 520. The branch pipes 520 are used to collect the waste gas inside the outer insulation shell 100 and pass it into the main pipe 510. The main pipe 510 passes the waste gas into the waste gas treatment device. The heat-conducting pipe 500 is a prior art technology.

[0076] As a preferred embodiment of this example, Figures 7 to 11 As shown, the lifting mechanism 600 includes:

[0077] A lifting bracket 610 is provided, on which lifting rollers 611 are rotatably connected. The lifting rollers 611 are arranged in an array, and the distribution of the lifting rollers 611 is the same as that of the lower rollers 110. A drive wheel 613 is also rotatably connected to the inner wall of the outer insulation shell 100. The drive wheel 613 is located on the upper and lower sides of the lifting bracket 610. When the lifting rollers 611 are at the same level as the lower rollers 110 or the upper rollers 300, the drive wheel 613 is tangent to the lifting rollers 611 and drives them to rotate when rotating. The drive wheel 613 is driven to rotate by a roller drive mechanism 140 installed externally.

[0078] A lifting rod 620 is provided, one end of which is fixedly connected to the lifting bracket 610. The lifting rod 620 passes through the outer insulation shell 100 above the lifting bracket 610. A lifting plate 630 is fixedly connected to the end of the lifting rod 620 away from the lifting bracket 610.

[0079] A power mechanism 640 is fixedly connected to the outer fixed shell 120. The power mechanism 640 is used to drive the lifting plate 630 to rise and fall, thereby driving the lifting bracket 610 to rise and fall.

[0080] In this embodiment, the lifting bracket 610 further includes a roller bracket 612, which is located at both ends of the lifting roller 611. The roller bracket 612 is elongated and has multiple circular holes for connecting the lifting roller 611. The lifting roller 611 is rotatably connected to the circular holes. A retaining ring structure is provided on the lifting roller 611 to prevent it from moving along its axis. The retaining ring structure is integrated with the lifting roller 611. The structure is integrated, with the drive wheel 613 being a disc structure. The power rod 614 and the drive wheel 613 are integrated, and the power rod 614 and the drive wheel 613 are concentrically arranged. The power rod 614 passes through the side wall of the outer insulation shell 100 and is rotatably connected to the outer insulation shell 100. The power rod 614 is connected to the roller drive mechanism 140 fixedly connected to the outer fixed shell 120, so that the lifting roller 611 and the lower roller 110 or the upper roller 300 rotate synchronously. In this embodiment, the lifting roller 611 is driven to rotate by the drive wheel 613 and the power rod 614. The power rod 614 is driven to rotate by a separate roller drive mechanism 140, thereby controlling the rotational speed of the lifting roller 611. The drive wheel 613 is located on the outer insulation shells 100 on both sides, and the drive wheel 613 is arranged in two rows. When the lifting roller 611 rises to a position coplanar with the upper roller 300, the lifting roller 611 and the upper drive wheel 613... When the lifting roller 611 descends to a position coplanar with the lower roller 110, the lifting roller 611 contacts the lower drive wheel 613. The drive wheel 613 is provided with a lower connecting pipe 615. The lifting plate 630 is a flat plate structure and is provided with an upper connecting pipe 631. The lifting rod 620 is fixedly connected to the lower connecting pipe 615 and the upper connecting pipe 631 by bolts, thereby connecting the lifting bracket 610 and the lifting plate 630.

[0081] Preferably, in this embodiment, an insulation pipe 104 is provided on the insulation top 102 located above the lifting bracket 610, and the lifting rod 620 is slidably connected inside the insulation pipe 104, and the insulation pipe 104 plays a role in heat insulation.

[0082] In a preferred embodiment of this invention, the lifting mechanism 600 includes a telescopic module 641 and a lifting support plate 642. The lifting support plate 642 is fixedly connected to the lifting plate 630, and the telescopic module 641 is fixedly connected to the outer fixed shell 120. The end of the telescopic module 641 is fixedly connected to the lifting support plate 642. The telescopic module 641 is used to control the lifting of the lifting support plate 642, thereby controlling the lifting of the lifting plate 630.

[0083] Preferably, in this embodiment, the telescopic module 641 is a hydraulic telescopic mechanism. The inlet circuit of the telescopic module 641 is equipped with a first flow valve and a first shut-off valve, and the outlet circuit of the telescopic module 641 is equipped with a second flow valve, a flow control valve, and a second shut-off valve. The outlet return flow of the telescopic module 641 is directly connected to an oil tank storing hydraulic oil. The first flow valve, the first shut-off valve, the second flow valve, the flow control valve, and the first shut-off valve are all controlled by the kiln's control structure (such as a computer in the control center, an industrial control computer, etc.). When the lifting plate 630 is raised, the second shut-off valve closes, and the hydraulic pump connected to the telescopic module 641 fills the telescopic module 641 with hydraulic oil. The output end of the telescopic module 641 extends, and the telescopic module 641 controls the lifting plate 630 to rise. The first flow valve synchronously detects the flow rate of the hydraulic oil filling the telescopic module 641. When the telescopic module 641 is filled with a preset volume of hydraulic oil, the hydraulic pump stops working and the first shut-off valve closes. When the lifting plate 630 descends, the second shut-off valve opens, and the output end of the telescopic module 641 retracts under the gravity of the lifting plate 630, the lifting rod 620, the lifting bracket 610, and the material. At the same time, the second flow control valve adjusts the flow rate of the liquid outlet circuit to control the descent speed of the lifting bracket 610. The second flow valve synchronously detects the liquid outlet flow rate of the telescopic module 641. After the preset volume of hydraulic oil is discharged from the telescopic module 641, the second shut-off valve closes, and the output shaft of the telescopic module 641 descends a preset height, that is, the lifting bracket 610 descends a preset height.

[0084] Preferably, multiple telescopic modules 641 are provided. The two ends of each telescopic module 641 are respectively hinged to the lifting support plate 642 and the outer fixing shell 120. The outer fixing shell 120 is provided with a fixing support 121, and the lifting support plate 642 is provided with a support structure connected thereto. The ends of the telescopic modules 641 are connected to the lifting support plate 642 and the outer fixing shell 120 through a pin structure. The telescopic modules 641 are inclined. In this embodiment, two telescopic modules 641 are provided, and the two telescopic modules 641 are mirror images of each other.

[0085] Example 3

[0086] As another embodiment of the present invention, this embodiment differs from embodiment 1 in that the lifting mechanism 600 further includes a compression spring 644. The lifting support plate 642 and the compression spring 644 are used to control the contact force between the lifting roller 611 and the drive wheel 613, so as to prevent the pressure of the lifting roller 611 and the drive wheel 613 from being too high or too low.

[0087] In this embodiment, the lifting support plate 642 is fixedly connected to the output end of the power mechanism 640. The lifting support plate 642 is arranged parallel to the lifting plate 630. A guide shaft 643 is provided on the lifting support plate 642. The guide shaft 643 passes through the lifting plate 630 and is slidably connected to the lifting plate 630. The guide shaft 643 is arranged perpendicular to the lifting plate 630. A guide sleeve 632 is provided on the lifting plate 630 and is sleeved on the guide shaft 643. The compression spring 644 is located between the lifting support plate 642 and the lifting plate 630. In the compressed state, the lifting support plate 642 supports the lifting plate 630. The compression force of the compression spring 644 can be controlled by controlling the distance between the lifting support plate 642 and the lifting plate 630. Since the drive wheel 613 is in a preset position and the drive wheel 613 and the lifting roller 611 are rigidly connected, the contact force between the lifting roller 611 and the drive wheel 613 can be controlled by controlling the height of the lifting support plate 642 and controlling the compression force of the compression spring 644. The end of the guide shaft 643 away from the lifting support plate 642 is connected to a nut structure, which serves as a limit.

[0088] In a preferred embodiment of this invention, to improve the lifespan of the compression spring 644, the energy-saving kiln further includes:

[0089] A heat dissipation mechanism 700 is used to dissipate heat from the compression spring 644. The heat dissipation mechanism 700 is installed on the lifting support plate 642 and drives airflow through the compression spring 644.

[0090] Preferred, such as Figure 12 and Figure 13 As shown, the heat dissipation mechanism 700 includes:

[0091] A heat dissipation shell 710 is fixedly connected to the lifting support plate 642. The heat dissipation shell 710 is a gourd-shaped shell with two intersecting circles.

[0092] A connecting shaft 720 is rotatably connected to the interior of the heat dissipation housing 710. Two connecting shafts 720 are provided, and the two connecting shafts 720 are respectively fixedly connected to the ends of the telescopic module 641. The axis of the connecting shaft 720 passes through the output end of the telescopic module 641 at the rotation center of the lifting support plate 642. A drive gear 730 is fixedly connected to the end of the connecting shaft 720.

[0093] A driven shaft 740 is rotatably connected to the interior of the heat dissipation housing 710. The driven shaft 740 is located between the two driving gears 730. A ratchet module 750 is fixed on the driven shaft 740. The ratchet module 750 has a tooth structure on its exterior that meshes with the driving gears 730. When the lifting support plate 642 is raised or lowered, the driving gears 730 drive the driven shaft 740 to rotate in the same direction through the ratchet module 750. A fan blade mechanism 770 is fixedly connected to the end of the driven shaft 740.

[0094] Specifically, in this embodiment, the heat dissipation housing 710 is fixedly connected to the lifting support plate 642 by screws. The connecting shaft 720 is the hinge shaft between the telescopic module 641 and the lifting support plate 642, and the connecting shaft 720 is fixed to the telescopic module 641 by an interference fit. The connecting shaft 720 is rotatably connected to the lifting support plate 642. The driving gear 730 is a spur gear, and the driving gear 730 is fixedly connected to the connecting shaft 720 by a key shaft. The inner ring of the ratchet module 750 is fixedly connected to the driven shaft 740, and the outer ring of the ratchet module 750 is connected to the driven shaft 740. When the lifting support plate 642 rises, the connecting shaft 720 on the left side drives the driven shaft 740 to rotate, while the connecting shaft 720 on the right side cannot drive the driven shaft 740 to rotate under the action of the ratchet module 750. When the lifting support plate 642 falls, the connecting shaft 720 on the right side drives the driven shaft 740 to rotate, while the connecting shaft 720 on the left side cannot drive the driven shaft 740 to rotate under the action of the ratchet module 750. This ensures that the fan blade mechanism 770 can generate airflow regardless of whether the lifting support plate 642 rises or falls.

[0095] An end cap 711 is fixed to the opening of the heat dissipation housing 710.

[0096] A retaining ring 760 is provided on the driven shaft 740, which is used to fix the ratchet module 750.

[0097] Preferably, a speed increaser 780 is also fixed inside the heat dissipation housing 710, the driven shaft 740 is fixedly connected to the input end of the speed increaser 780, and the fan blade mechanism 770 is fixedly connected to the output end of the speed increaser 780. The speed increaser 780 is a planetary gear speed increase mechanism used to drive the fan blade mechanism 770 to rotate rapidly.

[0098] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0099] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0100] 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 device for utilizing waste heat from a kiln, characterized in that, The waste heat recovery device includes: The outer insulation shell is a straight tunnel shape with openings at both ends, and the kiln chamber is located inside the outer insulation shell; The inner insulation shell is a straight tunnel shape with openings at both ends. The inner insulation shell is located inside the outer insulation shell. The preheating section of the kiln is located above the inner insulation shell. The combustion section and cooling section of the kiln are located inside the inner insulation shell. The top of the inner insulation shell is connected to the top of the inner insulation shell and the interior of the outer insulation shell through a top connecting pipe. There is a gap between the outer wall of the inner insulation shell and the inner wall of the outer insulation shell.

2. The kiln waste heat utilization device according to claim 1, characterized in that, The waste heat recovery device also includes: Two air guide plates, each U-shaped, are disposed inside the inner insulation shell. The openings of the two air guide plates are opposite to each other. A gap is provided between the air guide plates and the inner wall of the inner insulation shell. The top connecting pipe is located between the two air guide plates.

3. The kiln waste heat utilization device according to claim 1, characterized in that, The waste heat recovery device also includes: An air equalization plate is located between the upper roller and the inner insulation shell. The air discharged from the top connecting pipe first blows towards the air equalization plate, and after being equalized at the air equalization plate, it blows towards the upper roller.

4. The kiln waste heat utilization device according to claim 3, characterized in that, The wind distribution plate includes an upper arc plate and a lower arc plate. Both the upper arc plate and the lower arc plate are long strip structures with an arc-shaped cross section. The arc-shaped openings of the upper arc plate and the lower arc plate are arranged opposite each other and are staggered. The upper arc plates and the lower arc plates are arranged in an array, and the distance between adjacent upper arc plates is smaller than the width of the lower arc plate.

5. An energy-saving kiln, characterized in that, The kiln waste heat utilization device includes any one of claims 1-4, wherein the combustion section and cooling section of the kiln are disposed inside the inner insulation shell, the preheating section of the kiln is disposed above the inner insulation shell and inside the outer insulation shell, the feeding and discharging positions of the kiln are located at the same end of the outer insulation shell, and the outer insulation shell is closed off away from the discharging position. The kiln further includes: The lower roller and the upper roller are arranged in a linear array inside the outer insulation shell. The lower roller passes through the outer insulation shell and the inner insulation shell. The upper roller passes through the outer insulation shell and is located outside the inner insulation shell. A roller drive mechanism for driving the lower roller and the upper roller to rotate is provided outside the outer insulation shell. A burner, which is fixedly connected to the interior of the outer insulation shell, has a nozzle located thereon that passes through the side wall of the inner insulation shell and is disposed in the combustion section area within the inner insulation shell; Cooling pipes, wherein the cooling pipes are installed in the cooling section on the outer insulation shell, are used to cool the material located in the cooling section; The lifting mechanism includes a lifting bracket and a power mechanism. The power mechanism is located outside the outer insulation shell. The power mechanism drives the lifting bracket to move up and down inside the outer insulation shell, and the lifting bracket feeds the material on the upper roller onto the lower roller.

6. The energy-saving kiln according to claim 5, characterized in that, The burner's air inlet pipe is located between the outer insulation shell and the inner insulation shell, and the air inlet pipe is provided with multiple heating fins.

7. The energy-saving kiln according to claim 5, characterized in that, The lifting mechanism includes: A lifting support is provided, on which lifting rollers are rotatably connected. The lifting rollers are arranged in an array, and the distribution of the lifting rollers is the same as that of the lower rollers. A drive wheel is also rotatably connected to the inner wall of the outer insulation shell. The drive wheel is located on the upper and lower sides of the lifting support. When the lifting rollers are at the same level as the lower rollers or the upper rollers, the drive wheel is tangent to the lifting rollers and drives them to rotate. The drive wheel is driven to rotate by a roller drive mechanism installed externally. A lifting rod, one end of which is fixedly connected to the lifting bracket, the lifting rod passing through the outer insulation shell above the lifting bracket, and a lifting plate fixedly connected to the end of the lifting rod away from the lifting bracket; A power mechanism is fixedly connected to the outer insulation shell. The power mechanism is used to drive the lifting plate to rise and fall, thereby driving the lifting bracket to rise and fall.

8. The energy-saving kiln according to claim 7, characterized in that, The lifting mechanism includes: Telescopic module; A lifting support plate is connected to a lifting plate, and a telescopic module is connected to the outer insulation shell. The end of the telescopic module is connected to the lifting support plate, and the telescopic module is used to control the lifting and lowering of the lifting support plate.

9. The energy-saving kiln according to claim 8, characterized in that, The lifting support plate is fixedly connected to the output end of the power mechanism. The lifting support plate is arranged parallel to the lifting plate. A guide shaft is provided on the lifting support plate. The guide shaft passes through the lifting plate and is slidably connected to the lifting plate. The lifting mechanism further includes: A compression spring is located between the lifting support plate and the lifting plate. The compression spring is in a compressed state, and the lifting support plate supports the lifting plate.

10. The energy-saving kiln according to claim 9, characterized in that, The energy-saving kiln also includes: A heat dissipation mechanism is installed on the lifting support plate, and the heat dissipation mechanism drives airflow through the compression spring.

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