Heating furnace with waste heat recycling structure

Abstract

The invention relates to the technical field of electric heating furnace structures, in particular to a heating furnace with a waste heat recycling structure, which comprises an electric heating furnace, the electric heating furnace comprises an electric heating furnace box, the inner wall of the electric heating furnace box is connected with an inner frame plate, a heating cavity is arranged between the inner frame plate and the electric heating furnace box, and a resistance heating body is arranged in the heating cavity. An electromechanical box is installed on the front face of the electric heating furnace box, a left sealing door is movably installed on the left side of the electric heating furnace box, a temperature returning furnace box is connected to the right side of the electric heating furnace box, a frame set is installed at the bottom end of the inner wall of the inner frame plate and the bottom end of the inner wall of the temperature returning furnace box, and a partition piece is arranged between the electric heating furnace box and the temperature returning furnace box. By arranging the electric heating furnace box and the temperature returning furnace box, constant-temperature operation in the electric heating furnace box is guaranteed, heat preservation is conducted on hot air through the temperature returning furnace box, after feeding is conducted in the electric heating furnace box, high-temperature air in the temperature returning furnace box can rapidly flow into the electric heating furnace box, rapid heating in the electric heating furnace box is achieved, and heat loss during opening and closing of the left sealing door is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heating furnace structures, and in particular to a heating furnace with a waste heat recycling structure. Background Art

[0002] With the continuous growth of global energy demand and the continuous improvement of environmental protection requirements, improving energy utilization efficiency and reducing environmental pollution have become important issues in industrial production. Electric heating furnaces, as a common heating equipment, are widely used in various industrial fields such as metal processing, chemical industry, food processing, etc.

[0003] Electric heating furnaces use the Joule heat generated by the passage of electricity through a resistance heating element to transfer heat energy to the workpiece or material in the furnace through thermal radiation, thermal convection, and other methods to reach the required process temperature. Although electric heating furnaces have significant advantages over fuel furnaces, such as high temperature control accuracy, clean environment, and easy operation, their energy utilization efficiency has always been a key factor restricting their economic benefits and environmental friendliness. The waste heat recovery structure of traditional gas heating furnaces is difficult to adapt to electric heating furnaces. During the loading and unloading process of electric heating furnaces, the opening of the furnace door and the insertion hole of thermocouples will cause heat radiation dissipation and hot gas leakage losses. In particular, when the furnace door is opened, the rapid loss of heat makes it difficult to quickly recover the temperature in the heating cavity of the electric furnace in a short period of time, affecting the heating efficiency of subsequent materials. Therefore, a heating furnace with a waste heat recycling structure is needed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A heating furnace with a waste heat recycling structure includes an electric heating furnace, the electric heating furnace includes an electric heating furnace box, the inner wall of the electric heating furnace box is connected to an inner frame plate, and a heating cavity is provided between the inner frame plate and the electric heating furnace box, and a resistance heating element is installed in the heating cavity, an organic electrical box is installed on the front of the electric heating furnace box, a left sealed door is movably installed on the left side of the electric heating furnace box, a reheating furnace box is connected to the right side of the electric heating furnace box, a frame group is installed at the bottom end of the inner frame plate and the inner wall of the reheating furnace box, a partition is provided between the electric heating furnace box and the reheating furnace box, and the reheating furnace box A right sealed door is movably installed on the right side, and an interlayer cavity is opened inside the reheating furnace box, and a waste heat recovery component is installed in the interlayer cavity, and the waste heat recovery component includes a high-temperature pipe connected to the heating cavity of the electric heating furnace box, and the end of the high-temperature pipe is connected to a constant temperature conduction pipe, and the constant temperature conduction pipe is installed in the interlayer cavity of the reheating furnace box, and hot temperature outlets are equidistantly arranged on the end surface of the constant temperature conduction pipe. After the partition door rises and moves, the space between the electric heating furnace box and the reheating furnace box is integrated, which can facilitate the rapid return of heat in the reheating furnace box to the electric heating furnace box.

[0007] Preferably, the interlayer cavity wall of the regenerative furnace box is a multi-layer composite structure, and the inner wall of the interlayer cavity of the regenerative furnace box is provided with a refractory layer, a main thermal insulation layer and a backing layer, wherein the refractory layer of the regenerative furnace box is composed of refractory bricks, the main thermal insulation layer of the regenerative furnace box is made of aluminum silicate fiber, and the backing layer of the regenerative furnace box is made of calcium silicate board. The thermal conductivity of the aluminum silicate fiber material is extremely low, and is still much lower than other materials at high temperatures. This material is light in weight, small in heat capacity, easy to construct, and has good thermal shock resistance. The calcium carbonate board material can provide a flat support backing to enhance the overall structural strength.

[0008] Preferably, the constant temperature conduction pipe is designed in a square surround, a valve is installed on the surface of the high temperature pipe, an insulation box is installed on the surface of the high temperature pipe, and the insulation box is fixed on the outer surface of the electric heating furnace box. The square surround design of the constant temperature conduction pipe can directly heat the interlayer cavity of the reheating furnace box during hot gas conduction through the pipe medium, and the closed and open state of the high temperature pipe is controlled by the valve, and the chance of heat overflow can be reduced by the insulation box.

[0009] Preferably, the partition includes positioning columns fixed on both sides of the electric heating furnace box, and positioning rings are movably installed on the surfaces of the positioning columns. A partition door is connected between the two positioning rings, and the bottom end of the partition door is inserted from top to bottom at the joint between the electric heating furnace box and the reheating furnace box. The bottom end of the partition door closes the joint between the electric heating furnace box and the reheating furnace box. The positioning rings can be limited and guided by the positioning columns to ensure the stability of the partition door when it moves up and down, prevent the partition door from shifting during movement, and ensure the partition door's sealing effect on the opening between the electric heating furnace box and the reheating furnace box.

[0010] Preferably, the top of the positioning column is connected to a hanging plate, and a hydraulic cylinder is installed on the top of the hanging plate. The piston rod of the hydraulic cylinder passes through the hanging plate and is connected and fixed to the top of the partition door through a flange. The closing and opening state of the opening between the electric heating furnace box and the return temperature furnace box can be controlled by the extension and retraction of the piston rod of the hydraulic cylinder.

[0011] Preferably, a horizontal plate end is provided at the top of the partition door, and a sealing strip is provided around the bottom end of the horizontal plate end, and the sealing strip is in contact with the surface of the electric heating furnace box and the reheating furnace box. When the baffle end of the positioning column separates the electric heating furnace box and the reheating furnace box, the sealing strip at the bottom of the horizontal plate end of the partition door can be pressed against the surface of the electric heating furnace box and the reheating furnace box, thereby ensuring the sealing effect of the opening at the top end of the electric heating furnace box and the reheating furnace box.

[0012] Preferably, the frame group includes two slide rails, and a slide sleeve is slidably installed on the top of the two slide rails, and a support hole plate is connected to the top of the slide sleeve. By keeping the slide rails in the electric heating furnace box and the reheating furnace box on the same horizontal line, the slide sleeve can be quickly and stably moved to the slide rail surface, and then the material to be heated can be quickly moved into the electric heating furnace box.

[0013] Preferably, two connecting plates are symmetrically connected between the two slide rails, and the connecting plates are fixed to the inner frame plate or the inner wall of the reheating furnace box by bolts. A traction ring is connected to the right side of the support hole plate, and a rectangular ring end is provided inside the traction ring. Through the traction ring design on the side of the support hole plate, the support hole plate can be conveniently pulled by using traction equipment, which is convenient for taking out the heated material or moving the material to be heated into the electric heating furnace box.

[0014] Preferably, the left sealed door includes a door panel movably mounted on the side of the electric heating furnace box, the side of the door panel is connected to an extension plate, and a threaded shaft is embedded in the side of the extension plate through a slot, and the end of the threaded shaft is movably mounted on the surface of the electric heating furnace box, and a locking screw cap is provided on the threaded sleeve on the surface of the threaded shaft, and the locking screw cap is in contact with the surface of the extension plate, and is buckled into the slot of the extension plate by rotating the threaded shaft, so that the locking screw cap rotates and moves on the surface of the threaded shaft, and the locking screw cap is controlled to be in contact with the surface of the extension plate, thereby ensuring the tightness of the docking between the door panel and the electric heating furnace box and preventing the door panel from leaking during closure.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. By setting up an electric heating furnace box and a reheating furnace box, constant temperature operation in the electric heating furnace box is guaranteed. Compared with the traditional structure, this device uses the reheating furnace box to keep the hot air warm. After loading the material into the electric heating furnace box, the high-temperature gas in the reheating furnace box can quickly flow into the electric heating furnace box, realizing rapid temperature rise in the electric heating furnace box, reducing heat loss when opening and closing the left sealed door, and ensuring the heating efficiency of the material.

[0017] 2. By setting up a waste heat recovery component, the rapid heating operation of the material in the reheating furnace box can be achieved. This device cooperates with the high-temperature pipe and the constant temperature conduction pipe to form a connection between the electric heating furnace box and the reheating furnace box, so that the peak heat in the electric heating furnace box can enter the reheating furnace box for insulation during the heating process of the material. The constant temperature can be used to continuously heat the material, and the waste heat during the heating of the material is used to preheat the surface of the material to be heated, further improving the heating effect of the material to be heated during subsequent heating, and ensuring the heating efficiency of the material.

[0018] 3. By setting up a rack group, the rapid transfer of materials to be heated can be achieved. In this device, the electric heating furnace box and the slide rails in the reheating furnace box are kept on the same horizontal line. The supporting hole plate can be pulled under the traction equipment to quickly drive the slide assembly to slide on the slide rail surface, so that the preheated materials can be quickly moved to the inside of the electric heating furnace box, greatly shortening the time required for loading, reducing the heat loss of the materials to be heated, and reducing the market required for heating to the peak point in the electric heating furnace box, thereby further improving the heating efficiency of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the external structure of a heating furnace with a waste heat recycling structure proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the internal disassembled structure of a heating furnace with a waste heat recycling structure proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of a heating furnace frame assembly with a waste heat recycling structure proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the partial disassembly structure of a heating furnace frame assembly with a waste heat recycling structure proposed by the present invention;

[0024] Figure 5 This is a schematic diagram of the internal cross-section structure of an electric heating furnace in a heating furnace with a waste heat recycling structure proposed by the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of a partition in a heating furnace with a waste heat recycling structure proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the three-dimensional disassembled structure of a waste heat recovery component in a heating furnace with a waste heat recycling structure proposed by the present invention.

[0027] In the figure: 1. Electric heating furnace; 11. Electric heating furnace box; 12. Reheating furnace box; 13. Resistance heating element; 14. Inner frame plate; 15. Left sealed door; 151. Door panel; 152. Extension plate; 153. Threaded shaft; 154. Locking screw cap; 16. Electromechanical box; 17. Right sealed door; 2. Waste heat recovery assembly; 21. High-temperature pipe; 22. Constant temperature conduction pipe; 23. Hot and cold outlet; 24. Valve; 25. Insulation box; 3. Partition piece; 31. Positioning column; 32. Suspension plate; 33. Hydraulic cylinder; 34. Partition door; 35. Positioning ring; 4. Frame group; 41. Slide rail; 42. Connecting plate; 43. Slide kit; 44. Support hole plate; 45. Traction ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Reference Figure 1-7 A heating furnace with a waste heat recycling structure includes an electric heating furnace 1, which includes an electric heating furnace box 11. The inner wall of the electric heating furnace box 11 is connected to an inner frame plate 14, and a heating cavity is provided between the inner frame plate 14 and the electric heating furnace box 11, and a resistance heating element 13 is installed in the heating cavity. An electrical box 16 is installed on the front of the electric heating furnace box 11, and a left sealing door 15 is movably installed on the left side of the electric heating furnace box 11. A reheating furnace box 12 is connected to the right side of the electric heating furnace box 11, and a bracket group is installed on the bottom end of the inner frame plate 14 and the inner wall of the reheating furnace box 12. 4. A partition 3 is provided between the electric heating furnace box 11 and the regeneration furnace box 12. A right sealed door 17 is movably installed on the right side of the regeneration furnace box 12. An interlayer cavity is provided inside the regeneration furnace box 12, and a waste heat recovery component 2 is installed in the interlayer cavity. The waste heat recovery component 2 includes a high-temperature pipe 21 connected to the heating cavity of the electric heating furnace box 11. A constant temperature conduction pipe 22 is connected to the end of the high-temperature pipe 21, and the constant temperature conduction pipe 22 is installed in the interlayer cavity of the regeneration furnace box 12. Hot temperature outlets 23 are equidistantly provided on the end surface of the constant temperature conduction pipe 22.

[0030] The interlayer cavity wall of the regeneration furnace box 12 is a multi-layer composite structure. The inner wall of the interlayer cavity of the regeneration furnace box 12 is provided with a refractory layer, a main insulation layer and a backing layer. The refractory layer of the regeneration furnace box 12 is composed of refractory bricks, the main insulation layer of the regeneration furnace box 12 is made of aluminum silicate fiber, and the backing layer of the regeneration furnace box 12 is made of calcium silicate board.

[0031] The constant temperature conduction pipe 22 is designed in a square surround, a valve 24 is installed on the surface of the high temperature pipe 21, and an insulation box 25 is installed on the surface of the high temperature pipe 21, and the insulation box 25 is fixed to the outer surface of the electric heating furnace box 11.

[0032] The partition 3 includes positioning columns 31 fixed on both sides of the electric heating furnace box 11, and positioning rings 35 are movably installed on the surface of the positioning columns 31. A partition door 34 is connected between the two positioning rings 35, and the bottom end of the partition door 34 is inserted from top to bottom at the joint between the electric heating furnace box 11 and the reheating furnace box 12. The bottom end of the partition door 34 closes the joint between the electric heating furnace box 11 and the reheating furnace box 12.

[0033] The top of the positioning column 31 is connected to a hanging plate 32 , and a hydraulic cylinder 33 is installed on the top of the hanging plate 32 . The piston rod of the hydraulic cylinder 33 passes through the hanging plate 32 and is fixed to the top of the partition door 34 through a flange.

[0034] A horizontal plate end is provided at the top of the partition door 34 , and a sealing strip is provided around the bottom of the horizontal plate end, and the sealing strip contacts the surface of the electric heating furnace box 11 and the reheating furnace box 12 .

[0035] The frame assembly 4 includes two slide rails 41 , and a slide sleeve 43 is slidably mounted on the top of the two slide rails 41 , and a support orifice plate 44 is connected to the top of the slide sleeve 43 .

[0036] Two connecting plates 42 are symmetrically connected between the two slide rails 41. The connecting plates 42 are fixed to the inner frame plate 14 or the inner wall of the reheating furnace box 12 by bolts. A traction ring 45 is connected to the right side of the support hole plate 44, and a rectangular ring end is provided inside the traction ring 45.

[0037] The left sealed door 15 includes a door panel 151 movably mounted on the side of the electric heating furnace box 11, an extension plate 152 is connected to the side of the door panel 151, and a threaded shaft 153 is embedded in the side of the extension plate 152 through a slot, and the end of the threaded shaft 153 is movably mounted on the surface of the electric heating furnace box 11, and a locking screw cap 154 is threadedly sleeved on the surface of the threaded shaft 153, and the locking screw cap 154 abuts against the surface of the extension plate 152.

[0038] A partition 3 is provided between the electric heating furnace box 11 and the reheating furnace box 12, and the partition door 34 is lifted and displaced, so that the space between the electric heating furnace box 11 and the reheating furnace box 12 is integrated, which can facilitate the rapid return of heat in the reheating furnace box 12 to the electric heating furnace box 11, and quickly replenish the heat caused by unloading of the electric heating furnace box 11. The refractory layer of the reheating furnace box 12 can withstand an internal high temperature of more than 1200 degrees, resist thermal shock, chemical erosion of materials, and provide structural support. The main insulation layer at the top of the reheating furnace box 12 can assume the main insulation function, significantly reducing the conduction of heat to the furnace shell. The thermal conductivity of the aluminum silicate fiber material is extremely low, and is still much lower than other materials at high temperatures. This material is light in weight, small in heat capacity, easy to construct, and has good thermal shock resistance. The calcium carbonate board material can provide a flat support backing, enhance the overall structural strength, provide additional low-temperature zone insulation effect, and prevent the leakage of hot air in the furnace and the entry of cold air.

[0039] The square surrounding design of the constant temperature conduction pipe 22 can directly heat the interlayer cavity of the reheating furnace box 12 along the pipe medium during hot gas conduction. The closed and open states of the high-temperature pipe 21 are controlled by the valve 24, and the probability of heat overflow can be reduced by the heat preservation box 25. At the same time, when the high-temperature pipe 21 and the constant temperature conduction pipe 22 form a circulation pipeline, the hot gas flows from the high-temperature cavity to the normal-temperature cavity through the high-temperature pipe 21 and the constant temperature conduction pipe 22, forming a convection effect, which can quickly store and utilize the waste heat in the electric heating furnace box 11. The positioning ring 35 can be limited and guided by the positioning column 31 to ensure the stability of the partition door 34 when it moves up and down, prevent the partition door 34 from deviating during movement, and ensure the sealing effect of the partition door 34 on the opening between the electric heating furnace box 11 and the reheating furnace box 12. Corresponding sealing members are provided on the sides of the partition door 34, which can ensure the sealing effect of the inner wall of the docking point between the reheating furnace box 12 and the electric heating furnace box 11 when the partition door 34 is inserted.

[0040] A hydraulic pump and a control valve are arranged around the hydraulic cylinder 33. The flow and direction of the hydraulic oil are adjusted by the control valve to accurately control the lifting height and position of the partition door 34. The closing and opening state of the opening between the electric heating furnace box 11 and the reheating furnace box 12 can be controlled by the extension and contraction of the piston rod of the hydraulic cylinder 33. The end surface area of the horizontal plate at the top of the partition door 34 is larger than the cross-sectional area of the baffle end below. When the baffle end of the positioning column 31 separates the electric heating furnace box 11 and the reheating furnace box 12, the sealing strip at the bottom of the horizontal plate end of the partition door 34 can be pressed against the surface of the electric heating furnace box 11 and the reheating furnace box 12, thereby ensuring the sealing effect of the top opening of the electric heating furnace box 11 and the reheating furnace box 12.

[0041] By keeping the slide rails 41 in the electric heating furnace box 11 and the reheating furnace box 12 on the same horizontal line, the slide kit 43 can be quickly and stably moved to the surface of the slide rail 41, and then the material to be heated can be quickly moved into the electric heating furnace box 11. The slide kit 43 can be guided by the slide rail 41 to prevent the support hole plate 44 from shaking during movement. The traction ring 45 design on the side of the support hole plate 44 can facilitate the use of traction equipment to pull the support hole plate 44, making it convenient to take out the heated material or move the material to be heated into the electric heating furnace box 11. The slide rail 41 can be reinforced by the connecting plate 42 to ensure the balance of the two slide rails 41 and avoid the slide kit 43 from shifting during movement, which affects the movement stability of the support hole plate 44.

[0042] The left sealing door 15 has the same structure as the right sealing door 17. When the electric heating furnace box 11 or the reheating furnace box 12 is closed, the left sealing door 15 and the right sealing door 17 can be operated conveniently. When the door panel 151 is closed, the door panel 151 is attached to the left side of the electric heating furnace box 11, and the threaded shaft 153 is rotated and buckled into the slot of the extension plate 152, so that the locking screw cap 154 rotates and moves on the surface of the threaded shaft 153, and the locking screw cap 154 is controlled to abut against the surface of the extension plate 152 to ensure the tightness of the docking between the door panel 151 and the electric heating furnace box 11, and prevent the door panel 151 from deflation during the closure. The surface of the locking screw cap 154 is provided with a protrusion, which can make the protrusion of the locking screw cap 154 embedded in the groove on the surface of the extension plate 152 to prevent the threaded shaft 153 from moving easily. The sealing structure of the door panel 151 is a prior art and a well-known structure in the relevant field, which will not be described in detail here.

[0043] Working principle: According to the attached Figure 2 , Attachment Figure 3 With attached Figure 5As shown, during use, by starting the hydraulic cylinder 33, the hydraulic oil enters the rodless chamber of the hydraulic cylinder 33 through the control valve, pushing the piston rod to extend, and the piston rod of the hydraulic cylinder 33 pushes the partition door 34 downward. The partition door 34 can be inserted between the electric heating furnace box 11 and the reheating furnace box 12 during movement, thereby separating the electric heating furnace box 11 from the reheating furnace box 12. First, the left sealing door 15 and the right sealing door 17 on both sides are opened. The left sealing door 15 and the right sealing door 17 have the same structure. During the opening process, the door panel 151 can be pulled, and then the electric heating furnace box 11 is opened. At the same time, materials are loaded from both sides so that the materials are placed on the surface of the supporting orifice plate 44. When the left sealing door 15 and the right sealing door 17 are closed, the operating steps are the same. According to the left sealing door 15, the left sealing door 15 is raised. For example, by pushing the door panel 151, the door panel 151 is moved and buckled on the side of the electric heating furnace box 11, and at the same time, the threaded shaft 153 is rotated, so that the threaded shaft 153 is rotated and inserted into the groove of the extension plate 152. At this time, the locking screw cap 154 is rotated on the surface of the threaded shaft 153, so that the locking screw cap 154 moves and contacts the buckle on the surface of the extension plate 152 to complete the locking. The equipment is started by the electromechanical box 16 control, and the Joule heat generated by the power supply of the resistance heating element 13 is used to transfer the heat energy to the workpiece or material in the furnace through thermal radiation, thermal convection, etc., so that it reaches the required process temperature. In the design here, the material of the resistance heating element 13 can be resistance wire, silicon carbon rod, silicon molybdenum rod, etc. When the temperature inside the electric heating furnace box 11 rises to the process temperature, according to the attached Figure 5 As shown, by opening the valve 24, the high-temperature pipe 21 is connected to the constant-temperature conduction pipe 22, forming a through channel between the electric heating furnace box 11 and the regeneration furnace box 12, with a huge temperature difference. According to the second law of thermodynamics, the hot gas in the cavity of the high-temperature electric heating furnace box 11 will naturally flow to the normal-temperature cavity of the regeneration furnace box 12 to achieve temperature equilibrium. Since the flow between the high-temperature pipe 21 and the constant-temperature conduction pipe 22 is slow, it will not affect the heating effect of the material in the electric heating furnace box 11. Under the pressure difference, the gas in the high-temperature cavity of the electric heating furnace box 11 has a relatively high pressure due to its high temperature. This pressure difference will cause the gas to flow from the high-pressure area to the low-pressure area, and the high-temperature gas enters the interlayer cavity of the regeneration furnace box 12. The high temperature is conducted through the inner wall of the regeneration furnace box 12, causing the inner cavity of the regeneration furnace box 12 to heat up. The high-temperature gas in the interlayer cavity of the regeneration furnace box 12 can achieve a better thermal insulation effect and preheat the material in the regeneration furnace box 12.

[0044] Secondly, according to the attached Figure 2 As shown, when the material inside the electric heating furnace box 11 is heated, the door panel 151 can be opened, and the supporting hole plate 44 can be pulled by the traction device, so that the supporting hole plate 44 drives the slide sleeve 43 to move on the surface of the slide rail 41, thereby dragging the material on the surface of the supporting hole plate 44 to the external support plate platform, and taking out the heated material. At the same time, according to the attached Figure 6As shown, the hydraulic oil is recovered from the rodless chamber of the hydraulic cylinder 33 through the control valve, so that the piston rod is retracted, and the piston rod of the hydraulic cylinder 33 can drive the partition door 34 to move up, so that the partition door 34 is opened, so that the electric heating furnace box 11 and the reheating furnace box 12 are connected, and the supporting hole plate 44 in the reheating furnace box 12 is pulled by the traction equipment, so that the supporting hole plate 44 drives the slide kit 43 to move on the surface of the slide rail 41 in the reheating furnace box 12, and controls the supporting hole plate 44 to slide into the inside of the electric heating furnace box 11, so that after preheating, The material is moved to the electric heating furnace box 11, thereby shortening the material heating time. At this time, the door panel 151 can be re-closed. Since the temperature of the reheating furnace box 12 is high, the temperature of the reheating furnace box 12 and the electric heating furnace box 11 are quickly neutralized. Compared with the rapid loss of temperature in the electric heating furnace box 11 in traditional equipment, in this application, after the material is placed back in the electric heating furnace box 11, the initial temperature can be kept constant at a certain level to ensure the constant temperature effect in the electric heating furnace box 11. At the same time, according to the attached Figure 6 As shown, the piston rod of the hydraulic cylinder 33 pushes the partition door 34 to move, so that the partition door 34 moves to re-seal the electric heating furnace box 11 and the reheating furnace box 12. When heating inside the electric heating furnace box 11, the right sealed door 17 can be opened. The opening method is the same as the working principle of the left sealed door 15 mentioned above, so that new materials are placed on the surface of the support hole plate 44 in the electric heating furnace box 11. After completion, the right sealed door 17 is closed.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating furnace with a waste heat recycling structure, comprising an electric heating furnace (1), the electric heating furnace (1) comprising an electric heating furnace box (11), an inner frame plate (14) being connected to the inner wall of the electric heating furnace box (11), a heating cavity being provided between the inner frame plate (14) and the electric heating furnace box (11), and a resistance heating element (13) being installed in the heating cavity, an electric box (16) being installed on the front of the electric heating furnace box (11), and a left sealing door (15) being movably installed on the left side of the electric heating furnace box (11), characterized in that: The right side of the electric heating furnace box (11) is connected to a reheating furnace box (12), the inner frame plate (14) and the bottom end of the inner wall of the reheating furnace box (12) are installed with a frame group (4), a partition (3) is set between the electric heating furnace box (11) and the reheating furnace box (12), a right sealing door (17) is movably installed on the right side of the reheating furnace box (12), an interlayer cavity is opened inside the reheating furnace box (12), and a waste heat recovery component (2) is installed in the interlayer cavity, the waste heat recovery component (2) includes a high-temperature pipe (21) connected to the heating cavity of the electric heating furnace box (11), the end of the high-temperature pipe (21) is connected to a constant temperature conduction pipe (22), and the constant temperature conduction pipe (22) is installed in the interlayer cavity of the reheating furnace box (12), and the end surface of the constant temperature conduction pipe (22) is equidistantly provided with hot and cold outlets (23).

2. The heating furnace with waste heat recycling structure according to claim 1, characterized in that: The interlayer cavity wall of the regenerative furnace box (12) is a multi-layer composite structure, and the inner wall of the interlayer cavity of the regenerative furnace box (12) is provided with a refractory layer, a main thermal insulation layer and a backing layer, wherein the refractory layer of the regenerative furnace box (12) is composed of refractory bricks, the main thermal insulation layer of the regenerative furnace box (12) is made of aluminum silicate fiber, and the backing layer of the regenerative furnace box (12) is made of calcium silicate board.

3. The heating furnace with waste heat recycling structure according to claim 1, characterized in that: The constant temperature conduction pipe (22) is designed to be square and surround, a valve (24) is installed on the surface of the high temperature pipe (21), and an insulation box (25) is installed on the surface of the high temperature pipe (21), and the insulation box (25) is fixed on the outer surface of the electric heating furnace box (11).

4. The heating furnace with waste heat recycling structure according to claim 1, characterized in that: The partition member (3) includes positioning columns (31) fixed on both sides of the electric heating furnace box (11), and positioning rings (35) are movably installed on the surfaces of the positioning columns (31). A partition door (34) is connected between the two positioning rings (35), and the bottom end of the partition door (34) is inserted from top to bottom at the joint between the electric heating furnace box (11) and the reheating furnace box (12). The bottom end of the partition door (34) closes the joint between the electric heating furnace box (11) and the reheating furnace box (12).

5. The heating furnace with waste heat recycling structure according to claim 4, characterized in that: The top of the positioning column (31) is connected to a hanging plate (32), and a hydraulic cylinder (33) is installed on the top of the hanging plate (32). The piston rod of the hydraulic cylinder (33) passes through the hanging plate (32) and is connected and fixed to the top of the partition door (34) through a flange.

6. The heating furnace with waste heat recycling structure according to claim 5, characterized in that: The top of the partition door (34) is provided with a horizontal plate end, and the bottom of the horizontal plate end is surrounded by a sealing strip, and the sealing strip is in contact with the surface of the electric heating furnace box (11) and the reheating furnace box (12).

7. The heating furnace with a waste heat recycling structure according to claim 1, characterized in that: The frame group (4) comprises two slide rails (41), the top ends of the two slide rails (41) are slidably mounted with slide sleeves (43), and the top ends of the slide sleeves (43) are connected to support orifice plates (44).

8. The heating furnace with waste heat recycling structure according to claim 7, characterized in that: Two connecting plates (42) are symmetrically connected between the two slide rails (41), and the connecting plates (42) are fixed to the inner frame plate (14) or the inner wall of the reheating furnace box (12) by bolts. A traction ring (45) is connected to the right side of the support hole plate (44), and a rectangular ring end is provided inside the traction ring (45).

9. The heating furnace with a waste heat recycling structure according to claim 1, characterized in that: The left sealed door (15) comprises a door panel (151) movably mounted on the side of the electric heating furnace box (11); the side of the door panel (151) is connected to an extension plate (152); a threaded shaft (153) is embedded in the side of the extension plate (152) through a slot; and the end of the threaded shaft (153) is movably mounted on the surface of the electric heating furnace box (11); a locking screw cap (154) is threadedly sleeved on the surface of the threaded shaft (153), and the locking screw cap (154) contacts the surface of the extension plate (152).

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