Regenerative burner

Abstract

The utility model discloses a heat accumulating type burner, which comprises a box body, a burner and a gas pipeline, the box body comprises an upper box body unit and a lower box body unit, the bottom end of the upper box body unit is fixedly connected and communicated with the lower box body unit, a heat accumulating part is arranged in the upper box body unit, the lower box body unit is used for being communicated with a furnace body, and the gas pipeline is communicated with the furnace body. A combustible gas pipeline is arranged on the lower box body unit, the burner is arranged on the lower box body unit, the gas pipeline comprises a combustion-supporting air branch pipeline and a smoke exhaust branch pipeline, and one end of the combustion-supporting air branch pipeline and one end of the smoke exhaust branch pipeline are communicated with the top of the upper box body unit and are respectively provided with a combustion-supporting air valve and a smoke valve. The heat storage component is arranged in the box body, when high-temperature flue gas passes through the heat storage component, the heat storage component exchanges heat with the high-temperature flue gas, the temperature of the heat storage component is increased, and the temperature of the high-temperature flue gas is reduced, and when low-temperature combustion-supporting air flows through the heat storage component, the low-temperature combustion-supporting air exchanges heat with the heat storage component, so that the temperature of the combustion-supporting air is increased.

Description

Technical Field

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

[0002] A combustion furnace is a type of heat treatment equipment 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. Existing combustion furnaces have a fire tube inside the furnace, with burners extending into the fire tube. Combustion is drawn into the furnace by a fan, and after heating the workpiece inside the furnace, the generated flue gas is discharged from the flues at both ends of the furnace. Because the flue gas in this type of heat treatment furnace is discharged directly, the flue gas temperature is relatively high, and the high temperature of the flue gas is not fully utilized, resulting in low energy utilization and poor energy-saving effect. Summary of the Invention

[0003] The purpose of this invention is to provide a regenerative burner to overcome the technical defects of poor energy-saving effect in existing heat treatment furnaces.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a regenerative burner, including a housing, a burner, and a gas pipeline. The housing includes an upper housing unit and a lower housing unit. The bottom end of the upper housing unit is fixedly connected to and communicates with the lower housing unit. A heat storage component is installed inside the upper housing unit. The lower housing unit is used to communicate with the furnace body. A combustible gas pipeline is opened on the lower housing unit. The burner is installed on the lower housing unit. The gas pipeline includes a combustion air branch pipeline and a flue gas branch pipeline. One end of both the combustion air branch pipeline and the flue gas branch pipeline is connected to the top of the upper housing unit and is respectively provided with... Equipped with a combustion air valve and a flue gas valve, the combustion air valve is opened while the flue gas valve is closed to allow combustion air to be introduced into the chamber. The combustion air and the combustible gas supplied by the combustible gas pipeline are mixed and burned in the furnace. When the flue gas valve is opened and the combustion air valve is closed, the supply of combustible gas into the chamber is stopped. The flue gas in the furnace is discharged from the exhaust branch pipe through the chamber in sequence. When the flue gas enters the chamber from the furnace and passes through the exhaust branch pipe in the chamber, the heat storage component stores heat. When the combustion air enters the chamber through the combustion air branch pipe, the heat storage component heats up the combustion air.

[0005] This invention incorporates a heat storage component within the casing. When high-temperature flue gas passes through the heat storage component, the component exchanges heat with the flue gas, increasing its temperature and thus lowering the temperature of the flowing high-temperature flue gas. Conversely, when low-temperature combustion air flows through the heat storage component, it exchanges heat with it, raising its temperature. This dual approach lowers the temperature of the exhaust flue gas and raises the temperature of the combustion air. When applied to a heat treatment furnace, this invention improves the furnace's energy efficiency. Furthermore, the reduced exhaust gas temperature prevents damage to the exhaust pipes caused by high-temperature flue gas, reducing maintenance frequency and costs.

[0006] As a further improvement of this utility model, the upper housing unit comprises an upper metal shell and an upper low-cement castable. The upper low-cement castable is located inside the upper metal shell and has through holes running through its top and bottom. The heat storage component is disposed within the through holes. In this utility model, the upper low-cement castable serves to maintain heat and provide a certain degree of thermal insulation. The upper metal shell facilitates the molding of the upper low-cement castable and the connection of the entire housing.

[0007] As a further improvement of this utility model, the upper housing unit also includes an upper insulation layer, which is disposed between the upper low-cement castable and the upper metal shell. The inclusion of the upper insulation layer further enhances the thermal insulation and heat insulation effects of this utility model.

[0008] As a further improvement of this utility model, the heat storage component is made of heat storage bricks, and several gas channels running through the bricks are provided for the combustion air and flue gas to pass through. The heat storage bricks can quickly absorb the heat from the high-temperature flue gas and can quickly transfer the heat to the low-temperature combustion air.

[0009] As a further improvement of this utility model, a pipe connector is provided on the top of the upper housing unit. The gas pipeline also includes a connecting pipe. The bottom ends of the combustion air branch pipe and the smoke exhaust branch pipe are all connected to the top end of the connecting pipe, and the bottom end of the connecting pipe is connected to the pipe connector. This utility model facilitates the connection between the gas pipeline and the upper housing unit by providing the pipe connector and the connecting pipe.

[0010] As a further improvement of this utility model, the bottom ends of the combustion air branch pipe and the smoke exhaust branch pipe are bent upwards into a U-shape from a single pipe, and the bottom of the bent part is connected to the connecting pipe. In this utility model, the U-shaped structure allows for smoother flow of combustion air and high-temperature flue gas during use.

[0011] As a further improvement of this utility model, the lower housing unit includes a lower metal shell and a lower low-cement castable, with the lower low-cement castable disposed inside the lower metal shell. The lower housing unit of this utility model has better thermal insulation performance.

[0012] As a further improvement of this utility model, the lower housing unit also includes a lower insulation layer, which is disposed between the lower metal shell and the lower cement castable. The lower insulation layer further enhances the thermal insulation performance of the lower housing unit.

[0013] As a further improvement of this utility model, a furnace body connector is provided on the side of the lower housing unit away from the burner. The furnace body connector extends into the furnace body and is used to connect the furnace body and the lower housing unit. This utility model includes a furnace body connector to facilitate the connection between the utility model and the furnace body.

[0014] As a further improvement of this utility model, an asbestos gasket is provided at the connection between the upper housing unit and the lower housing unit. The asbestos gasket at the connection improves the sealing performance of this utility model.

[0015] In summary, the beneficial effects of this utility model are: by discharging the high-temperature flue gas from the furnace body and introducing combustion gases to increase the temperature of the combustion gases and decrease the temperature of the flue gas, the heat treatment furnace achieves better energy-saving performance and reduces the temperature of the emitted flue gas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is the front view of the present invention (excluding the gas pipeline).

[0018] Figure 3 This is a left view of the present invention (excluding the gas pipe).

[0019] Figure 4 This is a right view of the present invention (excluding the gas pipeline).

[0020] Figure 5 yes Figure 4 AA sectional view.

[0021] The components are as follows: 1. Box body; 2. Upper box body unit; 3. Lower box body unit; 4. Heat storage component; 5. Burner; 6. Gas pipeline; 7. Combustion air branch pipeline; 8. Smoke exhaust branch pipeline; 9. Combustion air valve; 10. Flue gas valve; 11. Upper metal shell; 12. Upper low-grade cement castable; 13. Upper insulation layer; 14. Pipe connector; 15. Connecting pipeline; 16. Lower metal shell; 17. Lower low-grade cement castable; 18. Lower insulation layer; 19. Furnace body connector; 20. Asbestos gasket; 21. Top plate; 22. Combustible gas pipeline. Detailed Implementation

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

[0023] like Figures 1 to 5 The regenerative burner shown is used in a heat treatment furnace, specifically in a combustion furnace. It includes a housing 1, a burner 5, and a gas pipeline 6. The housing 1 comprises an upper housing unit 2 and a lower housing unit 3. The outer contours of the horizontal cross-sections of both the upper housing unit 2 and the lower housing unit 3 are rectangular. The bottom end of the upper housing unit 2 is fixedly connected to and communicates with the lower housing unit 3. Figure 5As shown, the upper housing unit 2 is equipped with a heat storage component 4. When high-temperature gas passes through, the heat storage component 4 absorbs the temperature of the high-temperature gas and increases its temperature. After the temperature increases, when low-temperature gas passes through, it can exchange heat with the low-temperature gas and increase its temperature. The lower housing unit 3 is used to communicate with the furnace body in the use state. A combustible gas pipe 22 is opened on the lower housing unit 3 for introducing combustible gases such as natural gas into the lower housing unit 3. The burner 5 is set on the lower housing unit 3 for igniting the combustible gas.

[0024] like Figure 1 As shown, the gas pipeline 6 includes a combustion air branch pipeline 7 and a smoke exhaust branch pipeline 8. One end of both the combustion air branch pipeline 7 and the smoke exhaust branch pipeline 8 can be connected to the top of the upper housing unit 2. In operation, only one of the combustion air branch pipeline 7 and the smoke exhaust branch pipeline 8 is connected to the upper housing unit 2. Specifically, a combustion air valve 9 is installed on the combustion air branch pipeline 7, and a flue gas valve 10 is installed on the smoke exhaust branch pipeline 8. The combustion air valve 9 and the flue gas valve 10 are not opened simultaneously; only one is open at a time. When heating, the combustion air valve 9 is opened while the flue gas valve 10 is closed. The combustion air branch pipeline 7 is then connected to the upper housing unit 2, allowing combustion air (oxygen or air) to be introduced into the housing 1 via the upper housing unit 2. Meanwhile, the smoke exhaust branch pipeline 8 is connected to the upper housing unit 2 due to the flue gas... When valve 10 is closed, smoke cannot be discharged from the furnace body. In this state, the combustion air and the combustible gas supplied by the combustible gas pipeline 22 are mixed in the lower shell unit 3, ignited by the burner 5 and injected into the furnace body for combustion, providing heat to the furnace body. When venting smoke, the flue gas valve 10 is opened and the combustion air valve 9 is closed, and the supply of combustible gas to the housing 1 is stopped. At this time, the flue gas branch pipe 8 can discharge the flue gas in the furnace body through the housing 1 in sequence due to the opening of the flue gas valve 10. The combustion air branch pipe 7 stops heating because it lacks the conditions required for combustion due to the closure of the combustion air valve 9 and the cessation of the supply of combustible gas. In this utility model, there are two types of combustion air valve 9 and flue gas valve 10, one is a manual butterfly valve and the other is an electric butterfly valve.

[0025] In use, this utility model has at least one regenerative burner on each side of the furnace body. When the regenerative burner on one side of the furnace body supplies combustion air and combustible gas into the furnace body, the regenerative burner on the other side of the furnace body exhausts smoke into the furnace body. After a period of time (e.g., 10 seconds), the combustion and smoke exhaust of the regenerative burners on both sides of the furnace body alternate, so that combustion and smoke exhaust in the furnace body continue.

[0026] The flue gas discharged from the furnace is at a high temperature. The high-temperature flue gas enters the lower chamber unit 3 from the furnace and flows through the upper chamber unit 2 to the exhaust branch pipe 8. The heat storage component 4 absorbs the heat of the flue gas and stores the heat, causing its temperature to rise. When the combustion air enters the chamber 1 through the combustion air branch pipe 7, the combustion air exchanges heat with the heat storage component 4, causing the combustion air to heat up. In this invention, the high-temperature flue gas first exchanges heat with the heat storage component 4, and then the heat storage component 4 exchanges heat with the combustion air. On the one hand, it reduces the temperature of the discharged flue gas, and on the other hand, it increases the temperature of the combustion air, thereby improving the utilization rate of thermal energy and achieving the purpose of saving energy.

[0027] like Figure 5 As shown, the upper housing unit 2 comprises an upper metal shell 11, an upper insulation layer 13, and an upper low-cement castable 12. The upper low-cement castable 12 is located inside the upper metal shell 11, and the upper insulation layer 13 is disposed between the upper low-cement castable 12 and the upper metal shell 11. The upper insulation layer 13 is made of insulation cotton, which has the flexibility to easily deform under pressure and reduce or even disappear the deformation when the pressure is removed. When the upper low-cement castable 12 expands and deforms due to heat, it compresses the insulation layer 13, causing the insulation layer 13 to deform, thereby reducing damage to the upper metal shell 11. When the temperature of the upper low-cement castable 12 decreases and it shrinks and deforms, the insulation layer 13 returns to its original position or reduces its deformation. The upper low-cement castable 12 has a through hole running through it from top to bottom. The cross-sectional shape of the through hole is rectangular, and the heat storage component 4 is fixedly disposed in the through hole.

[0028] like Figure 5 As shown, the heat storage component 4 in this invention is composed of several heat storage bricks. Several gas channels (not shown in the figure) are provided on the heat storage bricks, running through them from top to bottom. The gas channels on adjacent layers of heat storage bricks are interconnected. In use, these gas channels allow combustion air and flue gas to pass through. During heating, when the combustible gas is burning inside the furnace, the combustion air flows downward through the gas channels of the heat storage bricks into the lower housing unit 3. During exhaust, the flue gas is discharged from the furnace and flows upward through the gas channels of the heat storage bricks, exiting through the exhaust branch pipe 8. By setting up heat storage bricks, the contact surface between the gas and the heat storage component 4 is increased to fully absorb the heat from the high-temperature gas. Also, by increasing the contact surface with the low-temperature combustion air, the heat from the heat storage bricks is utilized more quickly and fully. The heat storage bricks in this invention are arranged in at least six layers from top to bottom, with the density of gas channels on the bottom layer of heat storage bricks being greater than that on the other layers.

[0029] like Figures 1 to 5As shown, a pipe connector 14 is provided on the top of the upper housing unit 2. A top plate 21 is welded and fixed to the top of the upper metal shell 11. A circular hole is provided on the top plate 21. The bottom end of the pipe connector 14 is connected to the flange of the top plate 21. The upper part of the pipe connector 14 in this utility model is cylindrical, and the bottom is rectangular. The lower part of the pipe connector 14 gradually changes from circular to rectangular from top to bottom. The gas pipeline 6 is also provided with a connecting pipe 15. The bottom ends of the combustion air branch pipe 7 and the smoke exhaust branch pipe 8 are connected to the top end of the connecting pipe 15 to form a tee. The bottom end of the connecting pipe 15 is connected to the flange of the pipe connector 14. The bottom ends of the combustion air branch pipe 7 and the smoke exhaust branch pipe 8 in this utility model are made by bending both ends of a pipe upward into a U-shape, and the bottom of its bent part is connected to the connecting pipe 15, making the gas pipeline 6 as a whole Y-shaped.

[0030] like Figure 5 As shown, the lower housing unit 3 of this utility model includes a lower metal shell 16, a lower insulation layer 18, and a lower low-cement castable 17. The lower low-cement castable 17 is disposed inside the lower metal shell 16, and the lower insulation layer 18 is disposed between the lower metal shell 16 and the lower low-cement castable 17. The lower insulation layer 18 is also made of insulation cotton, which provides space for the deformation of the lower low-cement castable 17 while providing heat insulation, thus preventing damage to the lower metal shell 16 due to the deformation of the lower low-cement castable 17.

[0031] like Figure 2 and Figure 5 As shown, this utility model has a furnace body connector 19 on the side of the lower housing unit 3 away from the burner 5. The furnace body connector 19 extends into the furnace body and is welded and fixed to the furnace body, used to connect the furnace body and the lower housing unit 3. In this utility model, the furnace body connector 19 is connected to the flange of the lower housing unit 3. Asbestos gaskets 20 are provided at the connection between the upper housing unit 2 and the lower housing unit 3, and at the connection between the furnace body connector 19 and the lower housing unit 3.

[0032] 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. Regenerative burner, characterized in that: Comprising a box body, the box body comprising an upper box unit and a lower box unit, a bottom end of the upper box unit being fixedly connected with the lower box unit and being communicated, a heat storage component being arranged in the upper box unit, the lower box unit being used for being communicated with a furnace body, a combustible gas pipeline being arranged on the lower box unit; a burner, the burner being arranged on the lower box unit; a gas pipeline, the gas pipeline comprising a combustion air branch pipeline and a flue gas branch pipeline, one end of the combustion air branch pipeline and the flue gas branch pipeline being communicated with a top of the upper box unit and being respectively provided with a combustion air valve and a flue gas valve, the combustion air valve being opened and the flue gas valve being closed at the same time, so as to introduce combustion air into the box body, the combustion air and combustible gas provided by the combustible gas pipeline being mixed and sprayed in the lower box unit, and being combusted in the furnace body, the flue gas in the furnace body being discharged from the flue gas branch pipeline through the box body in sequence when the flue gas valve is opened and the combustion air valve is closed at the same time, and the introduction of combustible gas into the box body being stopped; the flue gas from the furnace body enters the box body and is guided to the flue gas branch pipeline in the box body, and the heat storage component stores heat, and the heat storage component heats the combustion air when the combustion air enters the box body through the combustion air branch pipeline.

2. Regenerative burner according to claim 1, characterized in that: The upper box unit comprises an upper metal shell and an upper low cement castable, the upper low cement castable is arranged in the upper metal shell, and the upper low cement castable has a through hole extending therethrough.

3. The regenerative burner of claim 2, wherein: The upper box unit further comprises an upper insulation layer, the upper insulation layer being arranged between the upper low cement castable and the upper metal shell.

4. Regenerative burner according to claim 2 or 3, characterized in that: The heat storage component is stacked by heat storage bricks, and a plurality of gas passages extending through the heat storage bricks are arranged on the heat storage bricks for the combustion air and the flue gas to pass through.

5. The regenerative burner of claim 1, wherein: A pipeline connecting piece is arranged at an upper portion of the upper box unit, the gas pipeline further comprises a connecting pipeline, bottom ends of the combustion air branch pipeline and the flue gas branch pipeline are communicated with a top end of the connecting pipeline, and a bottom end of the connecting pipeline is connected with the pipeline connecting piece.

6. A regenerative burner as claimed in claim 5, characterised in that: The bottom ends of the combustion air branch pipeline and the flue gas branch pipeline are bent upward into a U shape by one pipeline, and a bottom of a bending position thereof is communicated with the connecting pipeline.

7. The regenerative burner of claim 1, wherein: The lower box unit comprises a lower metal shell and a lower low cement castable, the lower low cement castable being arranged in the lower metal shell.

8. The regenerative burner of claim 7, wherein: The lower box unit further comprises a lower insulation layer, the lower insulation layer being arranged between the lower metal shell and the lower low cement castable.

9. The regenerative burner of claim 1, wherein: A furnace body connecting piece is arranged on a side of the lower box unit away from the burner, the furnace body connecting piece extending into the furnace body and being used for connecting the furnace body and the lower box unit.

10. The regenerative burner of claim 1, wherein: A asbestos pad is arranged at a connection position of the upper box unit and the lower box unit.

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