Regenerative burner trolley furnace

Abstract

The utility model discloses a heat accumulating type burner trolley furnace which comprises a furnace body, a furnace door and a trolley and further comprises two rows of heat accumulating type burners which are arranged on the left side and the right side of the furnace body respectively and conduct combustion heating on the interior of the furnace body alternately, each heat accumulating type burner comprises a box body, and the lower portion of each box body is communicated with the furnace body. A burner and a first gas pipeline are arranged on the side, away from the furnace body, of the lower portion of the box body, a smoke exhaust branch pipe and a combustion-supporting gas branch pipe which are communicated with the box body are arranged at the top of the box body, a smoke exhaust valve and a combustion-supporting gas valve are arranged on the smoke exhaust branch pipe and the combustion-supporting gas branch pipe respectively, and a heat storage component is arranged on the upper portion in the box body. Combustion-supporting gas and fuel gas at one side of the furnace body are combusted in the furnace body after being ignited by the burners, and smoke in the furnace body at the other side of the furnace body is exhausted through the box body and the smoke exhaust branch pipe. According to the utility model, the temperature of discharged flue gas is reduced, and the combustion-supporting gas after temperature rise is more beneficial to the combustion of fuel gas, so that the heat lost along with the discharge of the flue gas is reduced, and the energy-saving effect of the utility model is improved.

Description

Technical Field

[0001] This utility model relates to a regenerative burner trolley furnace, belonging to the technical field of heat treatment equipment. Background Technology

[0002] A bogie hearth furnace is a heat treatment device that alters the physical and chemical properties of materials through processes such as heating, heat preservation, and cooling, thereby improving their performance and service life. The existing bogie hearth furnace structure is disclosed in Chinese utility model patent with authorization announcement number CN210458288U.

[0003] Existing trolley furnaces typically heat-treat workpieces by burning fuel gas inside the furnace body. The flue gas produced by combustion is directly discharged from the furnace body. Because the flue gas is discharged directly, this type of heat treatment furnace has two problems. First, the flue gas temperature is high, which causes greater damage to the exhaust branch pipes and related components in the pipes, increasing the maintenance frequency and cost. Second, the high temperature contained in the flue gas is not fully utilized, resulting in low energy utilization and poor energy-saving effect, causing unnecessary energy waste. Summary of the Invention

[0004] The purpose of this invention is to provide a regenerative burner bogie furnace to solve the technical defects of existing bogie furnaces, such as poor energy-saving effect and high maintenance rate.

[0005] To solve the above problems, the technical solution adopted by this utility model is: a regenerative burner trolley furnace, including a furnace body, a furnace door, and a trolley. The furnace door is located at the front end of the furnace body and can be driven to open or close the furnace body by a furnace door drive device. When the furnace door is open, the trolley carrying the workpiece enters and exits the furnace body; when the furnace door is closed, it encloses the trolley carrying the workpiece to be processed within the furnace body. The furnace also includes two rows of regenerative burners respectively arranged on the left and right sides of the furnace body, which alternately burn and heat the furnace body. Each regenerative burner includes a housing, the lower part of which is connected to the furnace body. The lower part of the housing, away from the furnace body, has a burner and a first gas pipeline. The top of the housing has a connection to the first gas pipeline. The furnace has exhaust branch pipes and combustion-supporting branch pipes, each equipped with an exhaust valve and a combustion-supporting valve. A heat storage component is installed in the upper part of the furnace body. When the exhaust valve of the heat storage burner on one side of the furnace body is closed and the combustion-supporting valve is open, the combustion-supporting gas and fuel gas are ignited by the burner and burn in the furnace body. On the other side of the furnace body, the exhaust valve of the heat storage burner is open and the combustion-supporting valve is closed, and the flue gas in the furnace body is discharged through the furnace body and the exhaust branch pipes. When the heat storage burner discharges flue gas, the heat storage component in the furnace body absorbs the heat of the flue gas and raises its temperature. When the heat storage burner is burning, the combustion-supporting gas absorbs the heat absorbed by the heat storage component from the flue gas and raises its temperature as it passes through the heat storage component.

[0006] This invention features regenerative burners installed on both sides of the furnace body, with regenerative components inside each burner. While the burner on one side burns fuel within the furnace, the burner on the other side discharges flue gas. This discharge heats the regenerative components. When the burner on the other side needs to burn fuel, the regenerative components heat the combustion gas flowing through them. The burners alternately operate, and the regenerative components, through heat absorption and release, reduce the temperature of the exhaust gas, minimizing damage to the exhaust pipes and related components caused by excessively high flue gas temperatures. This lowers the overall maintenance probability and costs of the trolley furnace. Furthermore, the heated combustion gas promotes more complete combustion, reducing heat loss with the exhaust gas and lowering energy consumption, thus improving the energy-saving effect of this invention.

[0007] As a further improvement of this utility model, a connecting pipe is provided at the top of the housing, with the bottom end of the connecting pipe connected to the housing, and the exhaust branch pipe and the gas-supporting branch pipe both connected to the top end of the connecting pipe. This utility model, by providing the connecting pipe, facilitates the connection of the exhaust branch pipe and the gas-supporting pipe to the housing.

[0008] As a further improvement of this utility model, it also includes a main exhaust pipe, to which the exhaust branch pipes of all regenerative burners are connected. The main exhaust pipe is used to discharge the flue gas outside the workshop. By setting up a main exhaust pipe, this utility model allows the flue gas to be collected and discharged through the same pipe, which simplifies the layout of pipes in the workshop.

[0009] As a further improvement of this utility model, it also includes a main gas-supporting pipe, to which all the branch pipes are connected. The main gas-supporting pipe is used to supply gas-supporting fuel to the regenerative burners. This utility model sets up a main gas-supporting pipe connected to the branch pipes, using a single main gas-supporting pipe to supply gas to all the regenerative burners, thus reducing the number of pipes in the workshop.

[0010] As a further improvement of this utility model, the heat storage component is composed of multiple layers of heat storage bricks stacked on top of each other. Each heat storage brick has a flue gas passage hole that runs through it from top to bottom, allowing flue gas to pass through. Furthermore, the flue gas passage holes of adjacent layers of heat storage bricks are interconnected. The heat storage component in this utility model has a large height, allowing the flue gas or combustion gas to pass through it for a longer time, thus enabling more efficient utilization of the heat from the high-temperature flue gas.

[0011] As a further improvement of this utility model, the enclosure comprises, from the outside in, a metal shell, an insulation layer, and a low-cement castable, wherein the insulation layer is made of flexible insulation material. This utility model offers excellent thermal insulation, further enhancing its energy-saving effect.

[0012] As a further improvement of this utility model, a furnace body connecting pipe is provided on the furnace body, and the furnace body connecting pipe is detachably connected to the lower part of the box. This utility model provides a furnace body connecting pipe to facilitate the connection between the box and the furnace body.

[0013] As a further improvement of this utility model, it also includes a gas main pipe, to which the first gas pipes of all regenerative burners are connected. The gas main pipe is used to supply gas to the regenerative burners. This utility model provides a gas main pipe, allowing all regenerative burners to be supplied with gas through a single pipe connected to a gas source.

[0014] As a further improvement of this utility model, a second gas pipeline is also included. One end of the second gas pipeline is connected to the main gas pipeline, and the other end is connected to the furnace body, for introducing more gas into the furnace body. This utility model increases the amount of gas in the furnace body by directly introducing gas into the furnace body, thereby reducing the ratio of nitrogen to oxygen in the furnace body and reducing nitrogen oxides produced by combustion in the furnace body, so as to meet the emission standards for flue gas.

[0015] As a further improvement of this utility model, a first ladder is provided on the furnace body for climbing up the furnace body to inspect the pipes at the top of the furnace body. This first ladder is located away from the furnace door. This utility model provides a first ladder, allowing access to the top of the furnace body for inspection and maintenance of the pipes at the top.

[0016] In summary, the beneficial effects of this utility model are as follows: By setting regenerative burners on both sides of the furnace body, when one regenerative burner on one side is used to heat-treat the workpiece inside the furnace, the other regenerative burner discharges the flue gas from the furnace body. The combustion and flue gas discharge of the regenerative burners alternate. Through the heat absorption and heat release of the heat storage components, the temperature of the combustion gas is increased, the temperature of the flue gas is reduced, and the heat loss due to the discharge of flue gas is reduced, thereby improving the energy-saving effect of this utility model. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model.

[0018] Figure 2 This is the left view of this utility model.

[0019] Figure 3 This is a schematic diagram of the regenerative burner in this utility model.

[0020] Figure 4 This is a longitudinal sectional view of the regenerative burner in this utility model (excluding the exhaust branch pipe, the combustion-supporting branch pipe and the connecting pipe).

[0021] The components are as follows: 1. Furnace body; 2. Furnace door; 3. Trolley; 4. Furnace door drive device; 5. Regenerative burner; 6. Housing; 7. Burner; 8. First gas pipeline; 9. Exhaust branch pipe; 10. Auxiliary gas branch pipe; 11. Exhaust valve; 12. Auxiliary gas valve; 13. Regenerative component; 14. Connecting pipe; 15. Exhaust main pipe; 16. Auxiliary gas main pipe; 17. Metal shell; 18. Insulation layer; 19. Low-cement castable; 20. Furnace body connecting pipe; 21. Gas main pipe; 22. Second gas pipeline; 23. First ladder; 24. Second ladder; 25. Chimney; 26. Fan. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 The regenerative burner trolley furnace shown includes a furnace body 1, a furnace door 2, and a trolley 3. The furnace body 1 has an opening at its front end, and the furnace door 2 is located at the opening at the front end of the furnace body 1. The furnace body 1 can be opened or closed by a furnace door drive device 4. In this invention, the furnace door drive device 4 is a winch. The output shaft of the winch is connected to a chain or wire rope, which is connected to the top of the furnace door 2. The winch drives the chain or wire rope to wind up and pull the furnace door 2 upward to open the furnace door. Conversely, the winch drives the chain or wire rope to unwind, and the furnace door 2 moves downward under the action of gravity to close the furnace door 2. In this invention, sliding grooves are provided on both sides of the opening of the furnace body 1, and the two ends of the furnace door 2 are located in the sliding grooves. Inside, the movement of the furnace door 2 is limited and guided. When the furnace door 2 opens, the trolley 3 carrying the workpiece enters and exits the furnace body 1. When the furnace door 2 closes, it encloses the trolley 3 carrying the workpiece to be processed inside the furnace body 1. In this utility model, a guide rail is provided at the bottom inside the furnace body 1, and rollers that cooperate with the guide rail are provided at the bottom of the trolley 3. A roller drive motor is provided on the trolley 3 to drive the rollers to rotate, thereby driving the trolley 3 to enter and exit the furnace body 1. In this utility model, the connection between the furnace body 1, the furnace door 2, and the furnace door drive device 4 and the furnace door 2 is the prior art, as disclosed in Chinese Utility Model Patent No. CN222544411U. The trolley 3 is also the prior art, and will not be described in detail in this utility model.

[0024] like Figure 1 and Figure 2 As shown, this utility model is equipped with two rows of regenerative burners 5 located on the left and right sides of the furnace body 1, which alternately heat the furnace body 1 during use. Figure 3As shown, the regenerative burner 5 includes a housing 6. The lower part of the housing 6, near the furnace body 1, is connected to the furnace body 1. A burner 7 and a first gas pipeline 8 are located on the lower part of the housing 6 away from the furnace body 1. The first gas pipeline 8 is used to introduce gas into the housing 6. In this invention, natural gas is introduced into the housing 6 through the first gas pipeline 8. The burner 7 is used to ignite the natural gas. A flue gas branch pipe 9 and a gas-supporting branch pipe 10, connected to the top of the housing 6, are provided. A flue gas valve 11 is installed on the flue gas branch pipe 9. Opening and closing the exhaust valve 11 allows the exhaust branch pipe 9 to be connected to or disconnected from the housing 6. An auxiliary gas valve 12 is installed on the auxiliary gas branch pipe 10. Opening and closing the auxiliary gas valve 12 allows the auxiliary gas branch pipe 10 to be connected to or disconnected from the housing 6. In use, the exhaust valve 11 and auxiliary gas valve 12 of the same regenerative burner 5 are in the following states: when the exhaust valve 11 is open, the auxiliary gas valve 12 is closed, and when the auxiliary gas valve 12 is open, the exhaust valve 11 is closed.

[0025] like Figure 4 As shown, a heat storage component 13 is installed in the upper part of the housing 6. When the exhaust valve 11 of the regenerative burner 5 on the left side of the furnace body 1 is closed and the combustion-supporting gas valve 12 is open, the combustion-supporting gas and the combustion gas are ignited by the burner 7 and enter the furnace body 1 for combustion, heat treating the workpieces on the trolley 3 inside the furnace body 1. At this time, the exhaust valve 11 of the regenerative burner 5 on the right side of the furnace body 1 is open and the combustion-supporting gas valve 12 is closed. The flue gas in the furnace body 1 is discharged through the housing 6 and the exhaust branch pipe 9. When the regenerative burner 5 discharges flue gas, the heat storage component 13 in the housing 6 absorbs the heat of the flue gas and raises its temperature. When the regenerative burner 5 on the left side is burning, the combustion-supporting gas absorbs the heat of the heat storage component 13 as it passes through the heat storage component 13 and its temperature rises. Temperature; After the regenerative burners 5 on the left and right sides of the furnace body 1 have been in operation for a set time (e.g., 10 seconds), they switch working states. At this time, the exhaust valve 11 of the regenerative burner 5 on the left side of the furnace body 1 is opened while the combustion valve 12 is closed to exhaust the flue gas inside the furnace body 1. The heat storage component 13 absorbs the heat of the flue gas and heats up. Meanwhile, the exhaust valve 11 of the regenerative burner 5 on the right side of the furnace body 1 is closed while the combustion valve 12 is opened, and the gas is burned to heat treat the workpiece on the trolley 3 inside the furnace body 1. At the same time, the heat storage component 13 heats the combustion gas. After the set time is reached, the regenerative burners 5 on the left and right sides of the furnace body 1 switch working states again. This cycle continues until the heat treatment of the workpiece is completed.

[0026] like Figure 4 As shown, the heat storage component 13 in this invention is composed of multiple layers of heat storage bricks. Each heat storage brick has through-holes (not shown in the figure) that allow flue gas to pass through. The through-holes of adjacent layers of heat storage bricks are interconnected, allowing high-temperature flue gas and lower-temperature combustion-supporting gas to pass through at different times. The density of the through-holes on the bottommost layer of heat storage bricks is greater than that on the other layers. Figure 4The linear density of their cross-sections is different.

[0027] like Figure 3 As shown, the present invention has a connecting pipe 14 on the top of the housing 6. The bottom end of the connecting pipe 14 is connected to and communicates with the flange of the housing 6. The exhaust branch pipe 9 and the gas-supporting branch pipe 10 are both connected to the top end of the connecting pipe 14. The bottom end of the exhaust branch pipe 9 and the gas-supporting branch pipe 10 in the present invention is formed by bending the two ends of a pipe upward to form a U-shaped structure. The bottom of the bend is connected to the top end of the connecting pipe 14 to form a three-way structure.

[0028] like Figure 2 As shown, this utility model is equipped with a main exhaust pipe 15 and a main combustion gas supply pipe 16. All exhaust branch pipes 9 of the regenerative burners 5 are connected to the main exhaust pipe 15. The flue gas in the exhaust branch pipes 9 is collected in the main exhaust pipe 15. The main exhaust pipe 15 is used to discharge the flue gas outside the workshop. This utility model is equipped with a chimney 25 outside the workshop, and a fan 26 is installed on the main exhaust pipe 15 to draw the flue gas to the chimney 25 and discharge it outside the workshop. All combustion gas supply branch pipes 10 are connected to the main combustion gas supply pipe 16. The main combustion gas supply pipe 16 distributes the combustion gas to each combustion gas supply branch pipe 10 to provide combustion gas to the regenerative burners 5.

[0029] like Figure 4 As shown, the housing 6 of this utility model includes, from the outside to the inside, a metal shell 17, an insulation layer 18, and a low-cement castable 19. The insulation layer 18 is made of flexible insulation material. The insulation layer 18 in this utility model is made of insulation cotton. Its flexible and easily deformable characteristics allow the low-cement castable 19 to compress the insulation layer 18 when it expands and deforms under heat, thereby avoiding damage to the metal shell 17.

[0030] like Figure 3 As shown, in this utility model, the furnace body 1 is provided with a furnace body connecting pipe 20 that communicates with it. The furnace body connecting pipe 20 extends into the furnace body 1 from the left and right sides respectively and is welded and fixed to the furnace body 1. The furnace body connecting pipe 20 is detachably connected to the lower part of the box 6 by a flange. In this utility model, each furnace body connecting pipe 20 is connected to the box 6 of a regenerative burner 5.

[0031] like Figure 2 As shown, this utility model is equipped with a main gas pipe 21 and a second gas pipe 22. The first gas pipe 8 of all regenerative burners 5 is connected to the main gas pipe 21. The main gas pipe 21 is used to supply gas to the regenerative burners 5. One end of the second gas pipe 22 is connected to the main gas pipe 21, and the other end of the second gas pipe 22 is connected to the furnace body 1 and welded to the furnace body 1. It is used to introduce more natural gas into the furnace body 1, reduce the generation of nitrogen oxides during combustion, and make the emission of flue gas meet the emission standards.

[0032] like Figure 2 As shown, the present invention provides a first ladder 23 on the furnace body 1 for climbing the furnace body 1 to inspect the pipes at the top of the furnace body 1. The first ladder 23 is set away from the furnace door 2. If the present invention sets the first ladder 23 on the side away from the furnace door 2, the present invention provides a second ladder 24 on the top of the side of the furnace body 1 close to the furnace door 2, which can be used to inspect the chain or wire rope connected to the furnace door 2.

[0033] Unless otherwise specified in the above description, all parts are existing technology or can be implemented using existing technology. Furthermore, the specific embodiments described in this utility model are merely preferred embodiments of the invention and are not intended to limit the scope of this utility model. That is, all equivalent changes and modifications made within the scope of this utility model patent should be considered within the technical scope of this utility model.

Claims

1. A regenerative burner carriage furnace comprising a furnace body, a furnace door and a carriage, the furnace door being provided at a front end of the furnace body and being openable and closable to the furnace body by a furnace door driving device, the furnace door being opened for the carriage carrying workpieces to enter and exit the furnace body, and the furnace door being closed for the carriage carrying workpieces to be processed to be enclosed in the furnace body, characterized in that: The heat accumulating burner comprises a box body, the lower part of the box body is communicated with the furnace body, the lower part of the box body is provided with a burner and a first gas pipeline on the side away from the furnace body, the top of the box body is provided with a smoke exhaust branch pipe and a combustion-supporting gas branch pipe communicated therewith, a smoke exhaust valve and a combustion-supporting gas valve are arranged on the smoke exhaust branch pipe and the combustion-supporting gas branch pipe respectively, a heat accumulating component is arranged in the upper part of the box body, when the smoke exhaust valve of the heat accumulating burner on one side of the furnace body is closed and the combustion-supporting gas valve is opened, the combustion-supporting gas and the gas are ignited by the burner and then combusted in the furnace body, when the smoke exhaust valve of the heat accumulating burner on the other side of the furnace body is opened and the combustion-supporting gas valve is closed, the smoke in the furnace body is exhausted through the box body and the smoke exhaust branch pipe, when the heat accumulating burner exhausts the smoke, the heat accumulating component in the box body absorbs the heat of the smoke and increases the temperature, when the heat accumulating burner combusts, the combustion-supporting gas absorbs the heat absorbed by the heat accumulating component from the smoke and increases the temperature when passing through the heat accumulating component. ​ 2. The regenerative burner car furnace of claim 1, wherein: The top of the box body is provided with a connecting pipe, the bottom end of the connecting pipe is communicated with the box body, and the smoke exhaust branch pipe and the combustion-supporting gas branch pipe are both communicated with the top end of the connecting pipe.

3. The regenerative burner car furnace of claim 1, wherein: The heat accumulating burner further comprises a smoke exhaust main pipe, the smoke exhaust branch pipes of all the heat accumulating burners are communicated with the smoke exhaust main pipe, and the smoke exhaust main pipe is used for exhausting the smoke out of the workshop.

4. The regenerative burner car furnace of claim 1, wherein: The heat accumulating burner further comprises a combustion-supporting gas main pipe, all the combustion-supporting gas branch pipes are communicated with the combustion-supporting gas main pipe, and the combustion-supporting gas main pipe is used for providing the combustion-supporting gas to the heat accumulating burners.

5. The regenerative burner car furnace of claim 1, wherein: The heat accumulating component is stacked by a plurality of layers of heat accumulating bricks, the heat accumulating bricks are provided with smoke passing holes penetrating the heat accumulating bricks and communicated with the smoke passing holes of the adjacent two layers of heat accumulating bricks.

6. The regenerative burner car bottom furnace of claim 1 wherein: The box body comprises a metal shell, an insulation layer and a low cement castable in sequence from outside to inside, and the insulation layer is made of a flexible insulation material.

7. The regenerative burner car bottom furnace of claim 1 wherein: The furnace body is provided with a furnace body connecting pipe communicated therewith, and the furnace body connecting pipe is detachably connected with the lower part of the box body.

8. The regenerative burner car bottom furnace of claim 1 wherein: The heat accumulating burner further comprises a gas main pipe, the first gas pipelines of all the heat accumulating burners are communicated with the gas main pipe, and the gas main pipe is used for providing the gas to the heat accumulating burners.

9. The regenerative burner car bottom furnace of claim 8, wherein: The heat accumulating burner further comprises a second gas pipeline, one end of the second gas pipeline is communicated with the gas main pipe, the other end of the second gas pipeline is communicated with the furnace body, and the second gas pipeline is used for introducing more gas into the furnace body.

10. The regenerative burner car bottom furnace of claim 1 wherein: The furnace body is provided with a first ladder for climbing the furnace body to overhaul the pipelines on the top of the furnace body, and the first ladder is arranged at a position avoiding the furnace door.

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