Trolley type silicon carbon rod high temperature resistance furnace and operation method

Abstract

The invention relates to a trolley-type silicon carbon rod high-temperature resistance furnace and an operating method, comprising a furnace door, a furnace body, a trolley, and a double-acting flip sealing mechanism, wherein the furnace door cooperates with the furnace body, and the furnace body is composed of an inner low-cement refractory castable, a refractory fiber lining, and an outer steel structure furnace body, wherein the low-cement refractory castable is located at the lower part of the furnace body side wall, the lower part of the furnace body rear wall, and the furnace mouth, and the refractory fiber lining is located at the furnace top, the furnace body side wall, and the upper and middle part of the furnace body rear wall, and the bottom of the low-cement refractory castable has a support seat; a trolley is provided in the furnace body, and silicon carbon rods are used for heating, so that the furnace temperature uniformity is better than that of a flame furnace, and the product thermal processing quality is improved; the sealing strip is flipped upward to a horizontal state to realize the sealing between the trolley and the furnace body, and flipped downward to a vertical state to form a chamber furnace, so as to avoid causing the furnace temperature to drop rapidly, thereby delaying the oxidation of the silicon dioxide film and extending the service life of the silicon carbon rod.

Description

Technical Field

[0001] The invention relates to the field of industrial furnaces, and in particular to a trolley-type silicon carbon rod high-temperature resistance furnace and an operating method thereof. Background Art

[0002] The trolley-type industrial furnace is a key equipment for industrial heating. Industrial heating is an important part of my country's manufacturing industry, a large energy consumer, and a serious source of pollution. The harmful gases such as smoke, carbon dioxide, sulfur dioxide, and nitrogen oxides generated by the fuel furnace in the process of converting fuel into thermal energy are the main source of many conflicts between the environment and economic development. Especially for high-temperature fuel furnaces above 1200℃, a large amount of nitrogen oxides will be produced during the production process. Nitrogen oxides can cause acid rain, aggravate the greenhouse effect, destroy the ozone layer, and cause photochemical smog. At the same time, the fuel furnace needs to continuously provide combustion-supporting air to the furnace during the combustion of fuel, which leads to serious oxidation of the workpiece surface and large oxidation and burning loss, especially for heating expensive alloy steel products, which will cause a huge increase in product costs. Therefore, heating technology and equipment must follow the path of sustainable development with good economic benefits, low resource consumption, and less environmental pollution; the lower part of some existing silicon carbon rod high-temperature resistance furnaces is a fixed structure, which is not convenient to put larger heating workpieces inside. If the heating workpiece is large, if a trolley is used, the temperature of the silicon carbon rod is frequently lower than 270℃ due to the inability to seal well, resulting in a short service life of the silicon carbon rod and unsatisfactory effect. Summary of the invention

[0003] The present invention is aimed at fuel furnaces, especially high-temperature flame heating furnaces above 1200°C. In the production process, there are problems such as serious excessive nitrogen oxides, serious oxidation and burning of workpieces, and short service life of silicon carbon rods in silicon carbon rod high-temperature resistance furnaces. A trolley-type silicon carbon rod high-temperature resistance furnace and an operation method are provided to extend the service life of silicon carbon rods. Since the trolley-type silicon carbon rod high-temperature resistance furnace does not require fuel combustion and combustion-supporting air to be introduced into the furnace during the heating of the workpiece, the problems such as serious excessive nitrogen oxides in the fuel furnace and oxidation and burning of the workpiece are effectively solved.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A trolley-type silicon carbon rod high-temperature resistance furnace, comprising a furnace door, a furnace body, a trolley, and a double-acting flip sealing mechanism, wherein the furnace door cooperates with the furnace body, and the furnace body is composed of an inner low-cement refractory castable, a refractory fiber lining, and an outer steel structure furnace body, wherein the low-cement refractory castable is located at the lower part of the furnace body side wall, the lower part of the furnace body rear wall, and the furnace mouth, and the refractory fiber lining is located at the furnace top, the furnace body side wall, and the upper middle part of the furnace body rear wall, and the bottom of the low-cement refractory castable has a support seat; a trolley is provided in the furnace body, and wheels are installed at the lower part of the trolley, and the refractory fiber lining at the upper part of the furnace body and the furnace body The low-cement refractory castable at the bottom is provided with a number of silicon carbon rod mounting holes. The upper insulating porcelain tubes are installed in the silicon carbon rod mounting holes of the refractory fiber lining, and the lower insulating porcelain tubes are installed in the silicon carbon rod mounting holes of the low-cement refractory castable. The silicon carbon rods are installed vertically on the two side walls and the rear wall of the furnace body, and the two ends pass through the upper insulating porcelain tube and the lower insulating porcelain tube to the outside of the furnace body respectively. The silicon carbon rods are connected to electric wires, and the bottom of the silicon carbon rods is connected to a metal support plate. An insulating porcelain pad is installed between the upper part of the metal support plate and the lower end of the silicon carbon rod, and double-acting flip sealing mechanisms are provided on both sides and the rear of the trolley.

[0006] The double-acting flip sealing mechanism includes an electric push rod, a swivel arm, a sealing strip, a shaft, a pin, a bearing and a fixed seat. The fixed seat is connected to the electric push rod through a swivel shaft, and the telescopic rod of the electric push rod is connected to the swivel arm through a pin. The front end of the electric push rod has a through hole, and the through hole is hinged with the through hole on the rear side of the middle part of the swivel arm through a pin. A rotation gap is provided in the middle part of the swivel arm, and the telescopic rod swings in the rotation gap; the telescopic rod at the front end of the electric push rod flips relative to the swivel arm, the upper part of the swivel arm is connected to the shaft through a fixed groove, and the shaft is welded in the fixed groove, bearings are connected on both sides of the shaft, and the front part of the swivel arm is connected to the sealing strip, the sealing strip is composed of a steel plate shell and fiber, the steel plate shell is connected to the fiber, and the sealing strip is welded to the swivel arm, the fixed seat is connected to the lower part of the support seat, and the bearing is connected to the middle of the support seat through a fixed plane.

[0007] An operating method of a trolley-type silicon carbon rod high-temperature resistance furnace includes the following steps: the first step is a sealed closed state. After the trolley enters the furnace body and is in place, the electric push rod pushes the rotating arm to rotate 90° around the axis. Under the action of the rotating arm, the sealing strip is pressed upward to tightly seal the gap between the furnace body and the trolley, thereby achieving the sealing of the furnace body and the trolley.

[0008] The second step is to pull the rotating arm to rotate 90° around the axis in the non-sealed open state through the electric push rod. Under the action of the rotating arm, the sealing strip rotates from the horizontal state to the vertical state, eliminating the gap between the furnace body and the trolley and forming a chamber furnace. The bottom of the furnace is not directly exposed to the air at the room temperature of the workshop, so as to avoid a rapid drop in the furnace temperature, thereby delaying the oxidation of the silicon dioxide film and extending the service life of the silicon carbon rod.

[0009] Beneficial effects:

[0010] 1. The trolley-type silicon carbon rod high-temperature resistance furnace is a kind of furnace that uses electric energy as the medium. The trolley is convenient for placing larger heating workpieces. The silicon carbon rods are heated by electric heating elements. The temperature of the silicon carbon rod body can be as high as 1600℃. There is almost no smoke and nitrogen oxide emissions, and no combustion air is required. Therefore, the oxidation and burning rate of the workpiece is low. It is particularly suitable for heating in high-temperature furnaces above 1200℃. The trolley-type silicon carbon rod high-temperature resistance furnace significantly reduces pollution sources such as smoke, nitrogen oxides, and sulfur dioxide, realizes green production, significantly reduces oxidation and burning of workpieces, saves costs, has high thermal efficiency, saves energy and reduces consumption, has no combustion-supporting blast, and has no noise hazards.

[0011] 2. The trolley-type silicon carbon rod high-temperature resistance furnace adopts silicon carbon rod heating. The furnace temperature uniformity is better than that of the flame furnace, which improves the thermal processing quality of the product. The sealing strip is flipped upward to a horizontal state to achieve the seal between the trolley and the furnace body. It is flipped downward to a vertical state to form a chamber furnace to avoid a rapid drop in the furnace temperature, thereby delaying the oxidation of the silicon dioxide film of the silicon carbon rod and extending the service life of the silicon carbon rod.

[0012] 3. The furnace bottom is movable, loading and unloading of workpieces is convenient, and the trolley is convenient for placing larger heated workpieces. It has the advantages of ultra-low smoke and nitrogen oxide emissions, small environmental pollution, low workpiece oxidation and burning rate, no noise hazard, good furnace temperature uniformity, high thermal efficiency and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the trolley-type silicon carbon rod high-temperature resistance furnace described in the present invention.

[0014] Figure 2 It is a structural schematic diagram of the sealing state of the double-acting flip sealing mechanism of the trolley-type silicon carbon rod high-temperature resistance furnace described in the present invention.

[0015] Figure 3 It is a schematic diagram of the chamber-type furnace structure formed in the non-sealed state of the double-acting flip sealing mechanism of the trolley-type silicon carbon rod high-temperature resistance furnace described in the present invention.

[0016] Figure 4 The double-acting flip sealing mechanism of the trolley-type silicon carbon rod high-temperature resistance furnace of the present invention

[0017] In the figure:

[0018] 1-wheel; 2-double-acting flip sealing mechanism; 3-trolley; 4-furnace body; 5-silicon carbon rod; 6-upper insulating porcelain tube; 7-lower insulating porcelain tube; 8-insulating porcelain pad; 9-metal support plate; 10-electric push rod; 11-rotating arm; 12-sealing pressure strip; 13-shaft; 14-pin shaft; 15-bearing; 16-fixed seat; 17-silicon carbon rod mounting hole; 18-support seat; 19-rotating shaft; 20-low cement refractory castable; 21-refractory fiber furnace lining; 22-outer steel structure furnace body; 23-fixed groove; 24-rotation gap. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 4 As shown, the trolley-type silicon carbon rod high-temperature resistance furnace of the present invention comprises a furnace door, a furnace body 4, a trolley 3, and a double-acting flip sealing mechanism 2, wherein the furnace door cooperates with the furnace body 4, and the furnace body 4 is composed of an inner low-cement refractory castable 20, a refractory fiber lining 21, and an outer steel structure furnace body 22, wherein the low-cement refractory castable 41 is located at the lower part of the furnace body side wall, the lower part of the furnace body rear wall, and the furnace mouth, and the refractory fiber lining 21 is located at the furnace top, the furnace body side wall, and the upper and middle part of the furnace body rear wall, and the bottom of the low-cement refractory castable 20 has a support seat 18; a trolley 3 is provided in the furnace body 4, and a wheel 1 or a roller belt is installed at the lower part of the trolley 3, and a traction mechanism is installed on the trolley, which belongs to the prior art, and the traction mechanism can be driven by a motor reducer for self-propelled driving or a cogwheel mechanism. The refractory fiber lining 21 at the top of the furnace body 4 and the low-cement refractory castable 20 at the bottom of the furnace body 4 are both provided with a plurality of silicon carbon rod mounting holes 17. The upper insulating porcelain tube 6 is mounted in the silicon carbon rod mounting hole 17 of the refractory fiber lining 21, and the lower insulating porcelain tube 7 is mounted in the silicon carbon rod mounting hole 17 of the low-cement refractory castable 20. The inner diameters of the upper insulating porcelain tube 6 and the lower insulating porcelain tube 7 are both about 1.5 times the diameter of the cold end of the silicon carbon rod. The silicon carbon rod 5 is vertically mounted on the two side walls and the rear wall of the furnace body, and the two ends pass through the upper insulating porcelain tube 6 and the lower insulating porcelain tube 7 to exit the furnace body. The silicon carbon rod 5 The cold end passes through the outside of the furnace body for about 50 mm in length to connect the wires. The silicon carbon rod is connected to the wires. The bottom of the silicon carbon rod 5 is connected to a metal support plate 9 to bear the weight of the silicon carbon rod 5. An insulating ceramic pad 8 is installed between the upper part of the metal support plate 9 and the lower end of the silicon carbon rod 5. In order to increase the effective heating surface area of ​​the silicon carbon rod 5 and reduce the mass, as well as reduce the energy consumption required for heating the heating element, the top of the silicon carbon rod 5 is a free extension end. The furnace door cooperates with the furnace body 4. The furnace door can be opened and closed in a variety of ways, such as horizontal opening, up and down lifting, etc. The two sides and rear of the trolley 3 are provided with a double-acting flip sealing mechanism 2.

[0020] The double-acting flip sealing mechanism 2 is composed of an electric push rod 10 (or cylinder), a swing arm 11, a sealing strip 12, a shaft 13, a pin 14, a bearing 15 and a fixed seat 16; the fixed seat 16 is connected to the electric push rod 10 (or cylinder) through a swing shaft 19, and the telescopic rod of the electric push rod 10 (or cylinder) is connected to the swing arm 11 through a pin 14. The front end of the electric push rod has a through hole, and the through hole is hinged with the through hole on the rear side of the middle part of the swing arm 11 through the pin 14. A rotation gap 24 is provided in the middle part of the swing arm 11, and the telescopic rod swings in the rotation gap; the telescopic rod at the front end of the electric push rod is relatively flipped with the swing arm, and the upper part of the swing arm 11 is connected to the shaft 13 through a fixing groove 23, and the shaft 13 is welded in the fixing groove 23; the two sides of the shaft 13 are connected to the bearings 15, and the front part of the swing arm 11 is connected to the sealing strip 12, and the sealing strip 12 is composed of a steel plate shell and fiber, the steel plate shell is connected to the fiber, and the sealing strip is welded on the swing arm 11. The fixing seat 16 is connected to the lower part of the supporting seat 18, and the bearing 15 is connected to the middle part of the supporting seat 18 through a fixing plane. In order to prevent the temperature of the silicon carbon rod from frequently falling below 270°C and to extend the service life of the silicon carbon rod, a double-acting flip sealing mechanism is adopted.

[0021] The operation method of the trolley type silicon carbon rod high temperature resistance furnace includes the following steps: the first step is to seal the closed state, such as Figure 2 As shown, after the trolley 3 enters the furnace body 4 and is in place, the electric push rod (or cylinder) 10 pushes the rotating arm 11 to rotate 90° around the axis 13. Under the action of the rotating arm 11, the sealing strip 12 presses upward to tightly seal the gap between the furnace body 4 and the trolley 3, thereby achieving the sealing of the furnace body 4 and the trolley 3. In order to prevent the temperature of the silicon carbon rod from frequently falling below 270°C, the service life of the silicon carbon rod can be extended.

[0022] The second step is the non-sealed open state, such as Figure 3 As shown, the electric push rod (or cylinder) 10 pulls the rotating arm 11 to rotate 90° around the axis 13. Under the action of the rotating arm 11, the sealing strip 12 rotates from a horizontal state to a vertical state, thereby eliminating the gap between the furnace body 4 and the trolley 3 and forming a chamber furnace. The bottom of the furnace is not directly exposed to the air at the room temperature of the workshop, so as to avoid a rapid drop in the furnace temperature, thereby delaying the oxidation of the silicon dioxide film, extending the service life of the silicon carbon rod, and reducing energy loss and environmental pollution.

[0023] From the overall performance of the trolley-type silicon carbon rod high-temperature resistance furnace, it can significantly reduce pollution sources such as smoke, nitrogen oxides, and sulfur dioxide, and realize green production; it can significantly reduce oxidation and burning of workpieces and save costs; it has high thermal efficiency, and when fully loaded, the thermal efficiency η≥75%, which saves energy and reduces consumption; there is no combustion-supporting blast and no noise hazard; the temperature uniformity of its effective heating zone can reach the accuracy of ±10°C of Class III furnaces, which is better than traditional flame furnaces; from the perspective of construction cost, it is lower than traditional flame furnaces, the equipment performance is reliable, and it can be widely used in mechanical hot processing industry, representing an innovative direction for the green development of high-temperature heating furnaces above 1200°C.

Claims

1. A trolley-type silicon carbon rod high temperature resistance furnace, characterized in that: The invention comprises a furnace door, a furnace body, a trolley and a double-acting flip sealing mechanism. The furnace door cooperates with the furnace body. The furnace body is composed of an inner low-cement refractory castable, a refractory fiber lining and an outer steel structure furnace body. The low-cement refractory castable is located at the lower part of the furnace body side wall, the lower part of the furnace body rear wall and the furnace mouth. The refractory fiber lining is located at the furnace top, the furnace body side wall and the upper middle part of the furnace body rear wall. The bottom of the low-cement refractory castable has a support seat. A trolley is provided in the furnace body. Wheels are installed at the lower part of the trolley. The refractory fiber lining at the upper part of the furnace body and the low-cement refractory castable at the lower part of the furnace body are both provided with a plurality of The upper insulating porcelain tube is installed in the silicon carbon rod installation hole of the refractory fiber furnace lining, and the lower insulating porcelain tube is installed in the silicon carbon rod installation hole of the low cement refractory castable. The silicon carbon rod is installed vertically on the two side walls and the rear wall of the furnace body, and the two ends pass through the upper insulating porcelain tube and the lower insulating porcelain tube to the outside of the furnace body respectively. The length of the cold end of the silicon carbon rod passing through the outside of the furnace body is 50mm, the silicon carbon rod is connected to the wire, and the bottom of the silicon carbon rod is connected to the metal support plate. An insulating porcelain pad is installed between the upper part of the metal support plate and the lower end of the silicon carbon rod, and double-acting flip sealing mechanisms are provided on both sides and the rear of the trolley.

2. The trolley-type silicon carbon rod high temperature resistance furnace according to claim 1 is characterized in that: The double-acting flip sealing mechanism includes an electric push rod, a swivel arm, a sealing strip, a shaft, a pin, a bearing and a fixed seat. The fixed seat is connected to the electric push rod through a swivel shaft, and the telescopic rod of the electric push rod is connected to the swivel arm through a pin. The front end of the electric push rod has a through hole, and the through hole is hinged with the through hole on the rear side of the middle part of the swivel arm through a pin. A rotation gap is provided in the middle part of the swivel arm, and the telescopic rod swings in the rotation gap; the telescopic rod at the front end of the electric push rod flips relative to the swivel arm, the upper part of the swivel arm is connected to the shaft through a fixed groove, and the shaft is welded in the fixed groove, bearings are connected on both sides of the shaft, and the front part of the swivel arm is connected to the sealing strip, the sealing strip is composed of a steel plate shell and fiber, the steel plate shell is connected to the fiber, and the sealing strip is welded to the swivel arm, the fixed seat is connected to the lower part of the support seat, and the bearing is connected to the middle of the support seat through a fixed plane.

3. The operating method of the trolley-type silicon carbon rod high temperature resistance furnace according to claim 2 is characterized in that: The following steps are involved: The first step is the sealed closed state. After the trolley enters the furnace body and is in place, the electric push rod pushes the rotating arm to rotate 90° around the axis. Under the action of the rotating arm, the sealing strip is pressed upward to tightly seal the gap between the furnace body and the trolley, thus achieving the sealing of the furnace body and the trolley. The second step is to pull the rotating arm to rotate 90° around the axis in the non-sealed open state through the electric push rod. Under the action of the rotating arm, the sealing strip rotates from the horizontal state to the vertical state, eliminating the gap between the furnace body and the trolley and forming a chamber furnace. The bottom of the furnace is not directly exposed to the air at the room temperature of the workshop, so as to avoid a rapid drop in the furnace temperature, thereby delaying the oxidation of the silicon dioxide film and extending the service life of the silicon carbon rod.

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