Hot air combustion furnace

Abstract

The utility model relates to the technical field of metallurgy, in particular to a hot air combustion furnace. The utility model provides a hot air combustion furnace which is characterized in that a combustion inner furnace comprises a fuel input mechanism, a combustion air input mechanism, a combustion flue gas circulation mechanism and an exhaust port, the exhaust port is formed in the top of the combustion inner furnace, and input ports of the fuel input mechanism and the combustion air input mechanism are formed in the bottom of the combustion inner furnace; the combustion flue gas circulation mechanism comprises a circulation pipeline and a circulation fan, the circulation pipeline is provided with a circulation input port and a circulation output port, the circulation input port is formed in the side, close to the exhaust port, of the furnace wall of the combustion inner furnace, and the circulation output port is formed between the input port and the input port of the combustion air input mechanism; the circulating fan is used for providing acting force for smoke in the combustion inner furnace to flow from the circulating input port to the circulating output port. In the production process, when hot air generated by the combustion furnace is used for drying materials, smoke generated by material combustion is reused, and the smoke is discharged after being fully combusted to provide heat energy.

Description

Technical Field

[0001] This disclosure relates to the field of metallurgical technology, and in particular to a hot air combustion furnace. Background Technology

[0002] In the production process, it is common to use a combustion furnace to heat air and then utilize the hot air. However, directly emitting the flue gas generated during combustion without utilizing it pollutes the environment and wastes fuel. Furthermore, when using a combustion furnace to generate hot air, incomplete combustion gases are produced because the fuel is not fully burned. Utility Model Content

[0003] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, this disclosure provides a hot air combustion furnace, including an inner combustion furnace and a hot air outer layer, wherein the hot air outer layer is disposed outside the inner combustion furnace and is used to supply the gas to be heated to the outer wall of the inner combustion furnace, wherein...

[0005] The combustion furnace includes a fuel input mechanism, a combustion air input mechanism, a combustion flue gas circulation mechanism, and an exhaust port. The exhaust port is located at the top of the combustion furnace, and the input ports of the fuel input mechanism and the combustion air input mechanism are located at the bottom of the combustion furnace.

[0006] The combustion flue gas circulation mechanism includes a circulation pipeline and a circulation fan. The circulation pipeline has a circulation inlet and a circulation outlet. The circulation inlet is located on the side of the furnace wall of the combustion furnace near the exhaust port. The circulation outlet is located between the inlet and the inlet of the combustion air input mechanism. The circulation fan is used to provide the force for the flue gas in the combustion furnace to flow from the circulation inlet to the circulation outlet.

[0007] In one feasible implementation, the fuel input mechanism includes a material storage tank and a material conveying pipeline, the material conveying pipeline being connected to the material storage tank and the combustion furnace, and a flow control valve being provided on the material conveying pipeline.

[0008] In one feasible implementation, the flow control valve is configured as an electric butterfly valve.

[0009] In one feasible implementation, the combustion air input mechanism includes a combustion air fan, a combustion air input pipeline, and an air intake device. The combustion air input pipeline is connected to the combustion air fan and the air intake device. The air intake device is located at the center of the bottom of the combustion furnace and is used to release the combustion air input by the combustion air fan through the combustion air input pipeline.

[0010] In one feasible implementation, the air intake device is configured as a cylindrical hollow pipe, the combustion input pipe is connected to the side of the air intake device near the bottom of the combustion furnace, and the side wall of the air intake device has multiple exhaust holes.

[0011] In one possible implementation, the plurality of exhaust ports are arranged in an array along the circumference of the air intake device.

[0012] In one feasible implementation, the circulation pipeline includes an input pipeline and an output pipeline, the circulation fan is disposed between the input pipeline and the output pipeline, and the length of the input pipeline is less than the length of the output pipeline.

[0013] In one feasible implementation, a check valve is provided on the output pipeline.

[0014] In one feasible implementation, the outer layer of hot air has a hot air inlet and a hot air outlet, and a guide baffle is provided between the hot air inlet and the hot air outlet. The guide baffle is used to increase the travel distance of the air entering through the hot air inlet to the hot air outlet.

[0015] In one possible implementation, the diameter of the exhaust port is smaller than the diameter of the circulation input port.

[0016] Compared to existing technologies, this disclosure offers at least the following advantages: Incompletely combusted flue gas generated in the combustion furnace of this disclosure is re-entered into the combustion furnace for a second, more complete combustion under the action of the combustion flue gas circulation mechanism. This application solves the problem that during the production process, when the combustion furnace generates hot air to dry materials, the flue gas generated from the combustion of the materials is reused, undergoes complete combustion to provide heat energy, and is then discharged. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a front view structural diagram of the present disclosure.

[0021] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Material storage tank; 2-Blower; 3-Hot air outlet; 4-Combustion fan; 41-Combustion input pipeline; 5-Circulating fan; 51-Circulating pipeline; 6-Combustion furnace; 7-Air inlet device; 8-Exhaust port; 9-Guide baffle; 10-Flow control valve; 11-Heating outer layer; 12-Material conveying pipeline. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0023] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0024] Currently, it is common practice in production processes to heat air using combustion furnaces and then utilize the hot air. However, directly emitting the flue gas generated during combustion without utilizing it pollutes the environment and wastes fuel. When using combustion furnaces to generate hot air, incomplete combustion gases are produced because the fuel is not fully burned.

[0025] Based on this, the present disclosure provides a hot air combustion furnace. The incompletely combusted flue gas generated in the combustion furnace is re-entered into the combustion furnace for a second, more complete combustion under the action of a combustion flue gas circulation mechanism. This application solves the problem that during the production process, when the combustion furnace generates hot air to dry materials, the flue gas generated from the combustion of the materials can be reused, undergoing complete combustion to provide heat energy before being discharged.

[0026] The hot air combustion furnace will be described in detail below through specific embodiments:

[0027] Reference Figure 1As shown, this disclosure provides a hot air combustion furnace, including an inner combustion furnace 6 and a hot air outer layer 11. The hot air outer layer 11 is disposed outside the inner combustion furnace 6 and is used to provide the gas to be heated to the outer wall of the inner combustion furnace 6. The inner combustion furnace 6 includes a fuel input mechanism, a combustion air input mechanism, a combustion flue gas circulation mechanism, and an exhaust port 8. The exhaust port 8 is disposed at the top of the inner combustion furnace 6, and the input ports of the fuel input mechanism and the combustion air input mechanism are disposed at the bottom of the inner combustion furnace 6. The combustion flue gas circulation mechanism includes a circulation pipe 51 and a circulation fan 5. The circulation pipe 51 has a circulation input port and a circulation output port. The circulation input port is disposed on the side of the furnace wall of the inner combustion furnace 6 near the exhaust port 8, and the circulation output port is disposed between the input port and the input port of the combustion air input mechanism. The circulation fan 5 is used to provide the force for the flue gas in the inner combustion furnace 6 to flow from the circulation input port to the circulation output port.

[0028] This disclosure features a double-layer structure. The inner layer is a combustion furnace 6 where flame combustion generates heat, and the outer layer is a hot air outer layer 11 where air is introduced and heated to form hot air. Specifically, the hot air outer layer 11 includes a space for accommodating the air to be heated. Within this space, the air to be heated is heated by passing through the outer wall of the combustion furnace 6 to form hot air. The air to be heated within the hot air outer layer 11 flows from the inlet to the outlet via a blower 2. The combustion furnace 6 includes a fuel input mechanism, a combustion air input mechanism, a combustion flue gas circulation mechanism, and an exhaust port 8. The exhaust port 8 is located at the top of the combustion furnace 6 to facilitate the discharge of flue gas. The inlets of the fuel input mechanism and the combustion air input mechanism are located at the bottom of the combustion furnace 6 to improve the combustion effect within the furnace. In operation, the incompletely combusted flue gas generated in the combustion furnace is recirculated into the furnace by the combustion flue gas circulation mechanism for a second complete combustion. This second complete combustion of the incompletely combusted gas reduces pollution and provides heat energy. Specifically, the combustion flue gas circulation mechanism includes a circulation pipe 51 and a circulation fan 5. The circulation pipe 51 has a circulation inlet and a circulation outlet. The circulation inlet is located on the furnace wall of the combustion furnace 6 near the exhaust port 8 to maximize the combustion of the flue gas before circulation and to better prevent incompletely combusted flue gas from being discharged to the outside through the exhaust port 8. The circulation fan 5 provides the force for the flue gas to flow from the circulation inlet to the circulation outlet in the combustion furnace 6. The suction pressure of the circulation fan 5 should be such that it does not affect the exhaust port 8 when the pressure inside the furnace reaches the pressure discharge threshold. The circulation outlet of this disclosure is located between the inlet and the inlet of the combustion air input mechanism, which also allows the incompletely combusted flue gas to be circulated back to the combustion zone inside the furnace.

[0029] In some embodiments, the fuel input mechanism includes a material storage tank 1 and a material conveying pipeline 12, the material conveying pipeline 12 being connected to the material storage tank 1 and the combustion furnace 6, and a flow control valve 10 being provided on the material conveying pipeline 12.

[0030] In this embodiment, the fuel input mechanism of this disclosure includes a material storage tank 1 and a material conveying pipeline 12. The material conveying pipeline 12 connects the material storage tank 1 and the combustion furnace 6, and a flow control valve 10 is installed on the material conveying pipeline 12. The material storage tank 1 can be connected to the hot air outer layer 11 and integrated with the equipment. The material storage tank 1 can be configured to be detachable for easy maintenance, repair, and material filling. The flow control valve of this disclosure controls the flow rate at the throttling orifice by changing the size of the liquid resistance at the throttling orifice under a certain pressure difference, thereby adjusting the movement speed of the actuator (hydraulic cylinder or hydraulic motor). It can be configured as a throttle valve, speed regulating valve, overflow throttle valve, and flow divider / combiner valve, etc. Its connection method can be configured as flange type, threaded type, welded type, etc., and the control and adjustment method can be configured as automatic and manual. This disclosure specifically selects an automatic flow control valve.

[0031] In some embodiments, the flow control valve 10 is configured as an electric butterfly valve. In this embodiment, the flow control valve 10 is configured as an electric butterfly valve. Butterfly valves are characterized by simple structure, small size, light weight, low material consumption, small installation dimensions, rapid opening and closing, 90° reciprocating rotation, and low driving torque. They are used to cut off, connect, and regulate the medium in pipelines, and have good fluid control characteristics and sealing performance. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body. Therefore, the pressure drop generated by the valve is very small, resulting in good flow control characteristics, which facilitates the control and regulation of fuel flow to adjust the flame size.

[0032] In some embodiments, the combustion air input mechanism includes a combustion air blower 4, a combustion air input pipe 41, and an air intake device 7. The combustion air input pipe 41 is connected to the combustion air blower 4 and the air intake device 7. The air intake device 7 is located at the center of the bottom of the combustion furnace 6. The air intake device 7 is used to release the combustion air input by the combustion air blower 4 through the combustion air input pipe 41.

[0033] In this embodiment, in order to disperse the combustion air around the furnace chamber of the combustion furnace 6, the air intake device 7 is located at the center of the bottom of the combustion furnace 6 to release the combustion gas input by the combustion blower 4 through the combustion input pipe 41.

[0034] In some embodiments, the air intake device 7 is configured as a cylindrical hollow pipe, the combustion input pipe 41 is connected to the side of the air intake device 7 near the bottom of the combustion furnace 6, and there are multiple exhaust holes on the side wall of the air intake device 7.

[0035] In this embodiment, the air intake device 7 is configured as a cylindrical hollow pipe, and the absence of dead corners on the outer surface of the cylinder allows for better configuration of exhaust ports. The combustion-supporting input pipe 41 is connected to the side of the air intake device 7 near the bottom of the combustion furnace 6, enabling the combustion-supporting gas to flow from the bottom to the top of the air intake device 7 as much as possible, thereby increasing the combustion-supporting gas discharge area. It should be noted that the combustion-supporting input pipe 41 defines the air intake device 7 as two parts; the end near the bottom of the combustion furnace 6 is shorter than the other part, and the bottom part also has exhaust ports, allowing combustion-supporting gas to be discharged from the bottom of the air intake device 7 during combustion gas injection, further improving the combustion-supporting effect. Furthermore, multiple exhaust ports are arranged in an array along the circumference of the air intake device 7.

[0036] In some embodiments, the circulation pipeline 51 includes an input pipeline and an output pipeline, the circulation fan 5 is disposed between the input pipeline and the output pipeline, and the length of the input pipeline is less than the length of the output pipeline.

[0037] In this embodiment, the length of the input pipeline is shorter than the length of the output pipeline, meaning the volume of the output pipeline is larger than that of the input pipeline, allowing for more complete combustion of unburned gases in the output pipeline. Furthermore, a check valve is installed on the output pipeline to prevent flue gas from flowing back into the input pipeline when the furnace pressure is high.

[0038] In some embodiments, the outer hot air layer 11 has a hot air inlet and a hot air outlet 3, and a guide baffle 9 is provided between the hot air inlet and the hot air outlet 3. The guide baffle 9 is used to increase the travel distance of the air entering through the hot air inlet to the hot air outlet 3.

[0039] In this embodiment, a guide baffle 9 is provided between the hot air inlet and the hot air outlet 3. The guide baffle 9 is used to increase the travel distance of the air entering from the hot air inlet to the hot air outlet 3. Specifically, the hot air outer layer 11 can be a pipe spirally distributed on the outer wall of the combustion furnace 6 or a shell sleeved on the outside of the combustion furnace 6, forming a space for accommodating the heated gas. The entire hot air outer layer 11 should have a hot air inlet and a hot air outlet 3. In order to maximize the flow of the gas to be heated, the hot air inlet and the hot air outlet 3 may be directly opposite each other. By providing the guide baffle 9, it is possible to prevent the heated gas from entering directly from the inlet to the outlet without undergoing full-range flow.

[0040] In some embodiments, the diameter of the exhaust port 8 is smaller than the diameter of the recirculation inlet port, so as to ensure that the incompletely burned flue gas can enter the recirculation inlet port first when the combustion furnace 6 has not reached the pressure relief threshold.

[0041] In this disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0042] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A hot air combustion furnace, characterized in that, It includes an inner combustion furnace and a hot air outer layer, wherein the hot air outer layer is disposed outside the inner combustion furnace and is used to supply the gas to be heated to the outer wall of the inner combustion furnace. The combustion furnace includes a fuel input mechanism, a combustion air input mechanism, a combustion flue gas circulation mechanism, and an exhaust port. The exhaust port is located at the top of the combustion furnace, and the input ports of the fuel input mechanism and the combustion air input mechanism are located at the bottom of the combustion furnace. The combustion flue gas circulation mechanism includes a circulation pipeline and a circulation fan. The circulation pipeline has a circulation inlet and a circulation outlet. The circulation inlet is located on the side of the furnace wall of the combustion furnace near the exhaust port. The circulation outlet is located between the inlet and the inlet of the combustion air input mechanism. The circulation fan is used to provide the force for the flue gas in the combustion furnace to flow from the circulation inlet to the circulation outlet.

2. The hot air combustion furnace according to claim 1, characterized in that, The fuel input mechanism includes a material storage tank and a material conveying pipeline. The material conveying pipeline is connected to the material storage tank and the combustion furnace, and a flow control valve is installed on the material conveying pipeline.

3. The hot air combustion furnace according to claim 2, characterized in that, The flow control valve is configured as an electric butterfly valve.

4. The hot air combustion furnace according to claim 1, characterized in that, The combustion air input mechanism includes a combustion air blower, a combustion air input pipeline, and an air intake device. The combustion air input pipeline is connected to the combustion air blower and the air intake device. The air intake device is located at the center of the bottom of the combustion furnace and is used to release the combustion air input by the combustion air blower through the combustion air input pipeline.

5. The hot air combustion furnace according to claim 4, characterized in that, The air intake device is configured as a cylindrical hollow pipe, and the combustion input pipe is connected to the side of the air intake device near the bottom of the combustion furnace. The side wall of the air intake device has multiple exhaust holes.

6. The hot air combustion furnace according to claim 5, characterized in that, The plurality of exhaust ports are arranged in an array along the circumference of the air intake device.

7. The hot air combustion furnace according to claim 1, characterized in that, The circulation pipeline includes an input pipeline and an output pipeline, the circulation fan is disposed between the input pipeline and the output pipeline, and the length of the input pipeline is less than the length of the output pipeline.

8. The hot air combustion furnace according to claim 7, characterized in that, A check valve is installed on the output pipeline.

9. The hot air combustion furnace according to claim 1, characterized in that, The outer layer of the hot air has a hot air inlet and a hot air outlet. A guide baffle is provided between the hot air inlet and the hot air outlet. The guide baffle is used to increase the travel distance of the air entering through the hot air inlet to the hot air outlet.

10. The hot air combustion furnace according to claim 1, characterized in that, The diameter of the exhaust port is smaller than the diameter of the circulation input port.

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