Exhaust emission combustion heat energy recycling device applied to heating furnace

Abstract

A kind of waste gas emission combustion heat energy recycling device applied to heating furnace, for the heat energy generated when waste gas emission combustion of the waste gas emission mechanism of heating furnace is collected and utilized, it includes fume hood, heat exchange coil pipe, cold medium inflow pipeline, hot medium outflow pipeline, medium storage tank and pump body, fume hood is set above waste gas emission mechanism to be set in the flame cover generated by waste gas combustion, heat exchange coil pipe is set fixed on the inner side wall of fume hood, one end of cold medium inflow pipeline and hot medium outflow pipeline is connected with the medium storage tank arranged outside heating furnace, the other end of cold medium inflow pipeline and hot medium outflow pipeline is respectively connected with the medium inflow end and medium outflow end of heat exchange coil pipe, pump body is set on cold medium inflow pipeline, medium in medium storage tank is pumped into heat exchange coil pipe through pump body after absorbing flame heat energy, and then back flow through hot medium outflow pipeline, according to this, the heat energy generated when waste gas emission combustion is recycled.

Description

Technical Field

[0001] This utility model relates to the field of waste gas waste heat utilization technology, and in particular to a device for reusing the combustion heat energy of waste gas emissions from a heating furnace. Background Technology

[0002] Currently, in my country's workpiece heat treatment industry, the exhaust gases from protective atmosphere heating equipment, such as pusher-type furnaces, roller hearth furnaces, and box-type multi-purpose furnaces, are mostly guided outside the equipment for combustion and then directly discharged. There are currently few devices for recovering heat energy during the combustion process of these exhaust gases, resulting in energy waste to some extent. Therefore, how to recover and reuse the heat energy released during the combustion of exhaust gases from these equipment has become one of the urgent technical problems to be solved in this field. Utility Model Content

[0003] The technical problem to be solved by this technical solution is how to recover and reuse the heat energy generated during the exhaust combustion process of protective atmosphere heating equipment in the workpiece heat treatment industry.

[0004] To address the aforementioned technical problems, this technical solution provides a waste gas emission combustion heat energy recovery device for a heating furnace. This device collects and utilizes the heat energy generated during the emission of combustion waste gas from the furnace's waste gas emission mechanism. The waste gas emission mechanism is located outside the heating furnace and communicates with the furnace chamber. The waste gas emission combustion heat energy recovery device includes: a fume hood, a heat exchange coil, a medium storage tank, a cold medium inflow pipeline, a pump body, and a hot medium outflow pipeline. The fume hood is positioned above the waste gas emission mechanism and houses the flame generated during the combustion of waste gas. The heat exchange coil... The pipe is spirally coiled and fixed on the inner wall of the fume hood. The medium storage tank is located outside the heating furnace. One end of the cold medium inflow pipe is connected to the medium inflow end of the heat exchange coil, and the other end is connected to the medium storage tank. The pump body is located on the cold medium inflow pipe. One end of the hot medium outflow pipe is connected to the medium outflow end of the heat exchange coil, and the other end is connected to the medium storage tank. The pump body pumps the medium in the medium storage tank into the heat exchange coil through the cold medium inflow pipe to absorb the radiant heat energy of the flame. The heated medium then flows back to the medium storage tank through the hot medium outflow pipe. Accordingly, a smoke hood is used to house the flame generated during the exhaust of combustion gases by the exhaust gas emission mechanism, thereby reducing the heat loss of the flame's radiant heat energy. The medium circulation heat exchange system, consisting of heat exchange coils, a medium storage tank, a cold medium inflow pipeline, a pump body, and a hot medium outflow pipeline, can circulate the medium in the medium storage tank to the heat exchange coils inside the smoke hood to fully absorb the radiant heat energy of the flame, thereby converting the radiant heat energy of the flame into the medium temperature energy in the medium storage tank for use in other processes.

[0005] As another implementation of this technical solution, the exhaust gas emission mechanism consists of an exhaust gas emission pipe, a manual valve, a check valve, a burner, and an igniter. The exhaust gas emission pipe is vertically arranged, with its lower end passing through and fixed to the side wall of the heating furnace and communicating with the furnace chamber. The manual valve and the check valve are arranged sequentially from bottom to top on the exhaust gas emission pipe. The burner is installed at the upper end of the exhaust gas emission pipe, and the igniter is located beside the burner. Accordingly, the check valve ensures the safety of exhaust gas emission, the manual valve facilitates the control of the timing and amount of exhaust gas emission, and the igniter facilitates timely ignition of the exhaust gas discharged from the burner.

[0006] As another implementation of this technical solution, the smoke hood is composed of a conical cylinder, a smoke exhaust pipe, a cylindrical cylinder, a fixing rod, and two transverse connecting parts. The conical cylinder is set with its constricted end facing upwards. One end of the smoke exhaust pipe is connected to the constricted end of the conical cylinder, and the other end of the smoke exhaust pipe is connected to the workshop smoke exhaust pipe. The upper end of the cylindrical cylinder is connected to the open end of the conical cylinder. The fixing rod is vertically fixed to the side wall of the heating furnace. The two transverse connecting parts are horizontally fixed to the fixing rod at intervals. The upper transverse connecting part is fixedly connected to the smoke exhaust pipe, and the lower transverse connecting part is fixedly connected to the cylindrical cylinder. The heat exchange coils are coiled and fixed to the inner side walls of the cylindrical cylinder and the conical cylinder in sequence from bottom to top. The flame enters through the central position of the lower end of the cylindrical cylinder and is covered in the heat collection space formed by the conical cylinder and the cylindrical cylinder. Accordingly, the heat collection space, which is similar to an inverted funnel formed by the conical and cylindrical bodies, allows the heat exchange coils fixed inside to fully absorb the radiant heat energy of the flame. The flue gas after the flame combustion is collected through the conical body and transported outside the workshop for further treatment through the exhaust pipe and the workshop exhaust pipe, thereby reducing pollution to the workshop environment.

[0007] In another embodiment of this technical solution, the lower end of the heat exchange coil extends downward to the outer side of the lower end of the cylindrical body to form a medium inflow end, and the upper end of the heat exchange coil approaches the constricted end and penetrates the side wall of the conical cylinder to form a medium outflow end. This prevents damage from flame radiation heat energy at the connection points between the heat exchange coil and the cold medium inflow and hot medium outflow pipelines.

[0008] As another implementation of this technical solution, both the cold medium inflow pipeline and the hot medium outflow pipeline are made of steel pipes with external insulation material. This prevents the medium from losing heat during circulation.

[0009] As another implementation of this technical solution, a temperature sensor is installed on the outlet pipe of the hot medium. This facilitates the detection of the temperature of the return medium.

[0010] As another implementation of this technical solution, a flow meter is installed on the outlet pipeline of the hot medium. This facilitates the detection of problems such as leaks in the medium circulation heat exchange system or pump malfunctions.

[0011] As another implementation of this technical solution, a liquid level gauge is installed inside the medium storage tank. This facilitates the detection of the stored liquid level so that the medium storage tank can be replenished in a timely manner.

[0012] As another implementation of this technical solution, the medium storage tank is a water tank for a cleaning machine.

[0013] As another implementation of this technical solution, the medium is cleaning water or cleaning oil. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the waste gas emission combustion heat energy reuse device of the present invention applied to a heating furnace.

[0015] Figure 2 This is a partial structural schematic diagram of the present invention from another angle.

[0016] Explanation of symbols in the attached diagram: 1 Heating furnace; 11 Furnace chamber; 2 Exhaust gas emission mechanism; 21 Exhaust gas emission pipe; 22 Manual valve; 23 Check valve; 24 Burner; 25 Ignition device; 3 Smoke hood; 31 Conical cylinder; 32 Smoke exhaust pipe; 33 Columnar cylinder; 34 Fixing rod; 35 Horizontal connector; 4 Heat exchange coil; 41 Medium inlet end; 42 Medium outlet end; 5 Medium storage tank; 51 Liquid level gauge; 6 Cold medium inlet pipeline; 61 Pump body; 7 Hot medium outlet pipeline; 71 Temperature gauge; 72 Flow meter. Detailed Implementation

[0017] The detailed description and technical content of this utility model are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this utility model.

[0018] In the context of this specification, any two or more embodiments of this utility model can be arbitrarily combined, and the resulting technical solutions are part of the original disclosure of this specification and also fall within the protection scope of this utility model.

[0019] like Figure 1 and Figure 2The diagram shown is a schematic representation of a specific embodiment of the waste gas emission combustion heat energy recovery device for a heating furnace according to this utility model. This waste gas emission combustion heat energy recovery device (hereinafter referred to as the waste gas emission combustion heat energy recovery device) is used for collecting and utilizing the heat energy generated by the flame during the emission of combustion waste gas from the waste gas emission mechanism 2 of the heating furnace 1, specifically for the protective atmosphere heating equipment. Combined with... Figure 2 As shown, the exhaust gas emission mechanism 2 is a common component on the heating furnace 1. It is typically composed of an exhaust gas emission pipe 21, a manual valve 22, a check valve 23, a burner 24, and an igniter 25. The exhaust gas emission pipe 21 is vertically arranged, and its lower end is fixed to the side wall of the heating furnace 1 and communicates with the furnace chamber 11 of the heating furnace 1. The manual valve 22 and the check valve 23 are arranged sequentially from bottom to top on the exhaust gas emission pipe 21. The burner 24 is installed at the upper end of the exhaust gas emission pipe 21. The igniter 25 is located beside the burner 24. The check valve 23 prevents outside air from entering the furnace chamber 11, thereby ensuring the safety of exhaust gas emission. The manual valve 22 facilitates the control of the timing and amount of exhaust gas emission. The igniter 25 facilitates the timely ignition of the exhaust gas discharged from the burner 24.

[0020] The waste gas emission combustion heat energy recycling device of this utility model includes a fume hood 3, a heat exchange coil 4, a medium storage tank 5, a cold medium inflow pipe 6, a pump body 61, and a hot medium outflow pipe 7. The fume hood 3 is installed above the burner 24 of the waste gas emission mechanism 2 to cover the flame generated during the combustion of waste gas by the burner 24. The heat exchange coil 4 is spirally coiled and fixed to the inner wall of the fume hood 3. The medium storage tank 5 is located outside the heating furnace 1 and can be used for... The cleaning machine has a water tank, but it can also be other media storage components. The media stored in the media storage tank 5 can be cleaning water or cleaning oil. One end of the cold media inflow pipe 6 is connected to the media inflow end 41 of the heat exchange coil 4, and the other end is connected to the media storage tank 5. The pump body 61 is installed on the cold media inflow pipe 6. One end of the hot media outflow pipe 7 is connected to the media outflow end 42 of the heat exchange coil 4, and the other end is connected to the media storage tank 5. The pump body 61 pumps the media in the media storage tank 5 into the heat exchange coil 4 through the cold media inflow pipe 6 to absorb the radiant heat energy of the flame. The heated media then flows back to the media storage tank 5 through the hot media outflow pipe 7 for use in other processes.

[0021] Specifically, combined Figure 2As shown, the smoke hood 3 consists of a conical cylinder 31, a smoke exhaust pipe 32, a cylindrical body 33, a fixing rod 34, and two transverse connecting parts 35. The conical cylinder 31 is positioned with its constricted end facing upwards. One end of the smoke exhaust pipe 32 can be welded to the constricted end of the conical cylinder 31, and the other end of the smoke exhaust pipe 32 is connected to the workshop smoke exhaust pipe (not shown in the figure). The upper end of the cylindrical body 33 can also be welded to the open end of the conical cylinder 31. The fixing rod 34 is vertically fixed to the upper side wall of the heating furnace 1. The two transverse connecting parts 35 are horizontally fixed to the fixing rod 34 at intervals. The upper transverse connecting part 35 is fixedly connected to the smoke exhaust pipe 32, and the lower transverse connecting part 35 is fixed to the smoke exhaust pipe 32. Component 35 is fixedly connected to the cylindrical body 33. The heat exchange coil 4 is sequentially coiled and fixed on the inner sidewalls of the cylindrical body 33 and the conical body 31 from bottom to top. The lower end of the heat exchange coil 4 extends downward to the outer side of the lower end of the cylindrical body 33 to form the medium inflow end 41. The upper end of the heat exchange coil 4 is near the constricted end and passes through the sidewall of the conical body 31 to form the medium outflow end 42. This can prevent the connection between the heat exchange coil 4 and the cold medium inflow pipe 6 and the hot medium outflow pipe 7 from being damaged by the flame radiation heat energy. The flame generated by the combustion of exhaust gas enters through the central position of the lower end of the cylindrical body 33 and is covered in the heat collection space formed by the conical body 31 and the cylindrical body 33. Accordingly, the heat collection space, which is similar to an inverted funnel, formed by the conical cylinder 31 and the cylindrical cylinder 33, allows the heat exchange coil 4, which is fixed inside the space, to fully absorb the radiant heat energy of the flame. The flue gas after the flame is burned will be collected by the conical cylinder 31 and transported outside the workshop for further treatment through the exhaust pipe 32 and the workshop exhaust pipe, thereby reducing the pollution to the workshop environment.

[0022] Furthermore, both the cold medium inflow pipe 6 and the hot medium outflow pipe 7 are made of steel pipes with external insulation material, which prevents heat loss during the circulation process. Additionally, the hot medium outflow pipe 7 can be equipped with a temperature sensor 71 and a flow meter 72 to detect the temperature of the return medium and to check for leaks or pump malfunctions in the medium circulation heat exchange system consisting of the heat exchange coil 4, medium storage tank 5, cold medium inflow pipe 6, pump body 61, and hot medium outflow pipe 7. A level sensor 51 can also be installed in the medium storage tank 5 to monitor the stored medium level and replenish it promptly.

[0023] In summary, the exhaust gas combustion heat energy recycling device of this utility model can house the flame generated during the exhaust gas emission process of the exhaust gas emission mechanism 2 through the smoke hood 3, thereby reducing the heat dissipation of the flame radiation heat energy. The medium circulation heat exchange system, which consists of heat exchange coil 4, medium storage tank 5, cold medium inflow pipe 6, pump body 61 and hot medium outflow pipe 7, can circulate the medium in the medium storage tank 5 to the heat exchange coil 4 inside the smoke hood 3 to fully absorb the flame radiation heat energy. Thus, the flame radiation heat energy can be converted into the medium temperature energy in the medium storage tank 5 for use in other processes.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the patent scope of the present utility model. Other equivalent changes made using the patent concept of the present utility model should all fall within the patent protection scope of the present utility model.

Claims

1. A device for recovering combustion heat energy from exhaust gas in a heating furnace, used to collect and utilize the heat energy generated during the exhaust gas discharge process of the heating furnace, wherein the exhaust gas discharge mechanism is located outside the heating furnace and communicates with the furnace chamber, characterized in that, The waste gas emission combustion heat energy recovery device includes: a fume hood, a heat exchange coil, a medium storage tank, a cold medium inflow pipeline, a pump body, and a hot medium outflow pipeline. The fume hood is installed above the waste gas emission mechanism and covers the flame generated during the combustion of waste gas. The heat exchange coil is spirally coiled and fixed to the inner wall of the fume hood. The medium storage tank is located outside the heating furnace. One end of the cold medium inflow pipeline is connected to the medium inflow end of the heat exchange coil. The other end of the cold medium inflow pipe is connected to the medium storage tank. The pump body is installed on the cold medium inflow pipe. One end of the hot medium outflow pipe is connected to the medium outflow end of the heat exchange coil. The other end of the hot medium outflow pipe is connected to the medium storage tank. The pump body pumps the medium in the medium storage tank into the heat exchange coil through the cold medium inflow pipe to absorb the heat energy of the flame. The heated medium then flows back to the medium storage tank through the hot medium outflow pipe.

2. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, The exhaust gas emission mechanism consists of an exhaust gas emission pipe, a manual valve, a check valve, a burner, and an igniter. The exhaust gas emission pipe is vertically arranged and its lower end is fixed to the side wall of the heating furnace and communicates with the furnace chamber. The manual valve and the check valve are arranged sequentially from bottom to top on the exhaust gas emission pipe. The burner is installed at the upper end of the exhaust gas emission pipe, and the igniter is located beside the burner.

3. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, The smoke hood is composed of a conical cylinder, a smoke exhaust pipe, a cylindrical cylinder, a fixing rod, and two transverse connecting parts. The conical cylinder is positioned with its constricted end facing upwards. One end of the smoke exhaust pipe is connected to the constricted end, and the other end of the smoke exhaust pipe is connected to the workshop smoke exhaust pipe. The upper end of the cylindrical cylinder is connected to the open end of the conical cylinder. The fixing rod is vertically mounted on the side wall of the heating furnace. The two transverse connecting parts are horizontally and spaced apart and fixedly mounted on the fixing rod. The upper transverse connecting part is fixedly connected to the smoke exhaust pipe, and the lower transverse connecting part is fixedly connected to the cylindrical cylinder. The heat exchange coils are sequentially coiled and fixed to the inner side walls of the cylindrical cylinder and the conical cylinder from bottom to top. The flame enters through the central position of the lower end of the cylindrical cylinder and is covered within the heat collection space formed by the conical cylinder and the cylindrical cylinder.

4. The waste gas emission combustion heat energy recovery device according to claim 3, characterized in that, The lower end of the heat exchange coil extends downward to the outer side of the lower end of the cylindrical body to form the medium inflow end, and the upper end of the heat exchange coil is adjacent to the constricted end and extends through the side wall of the conical body to form the medium outflow end.

5. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, Both the cold medium inflow pipeline and the hot medium outflow pipeline are made of steel pipes with the outer side covered with heat insulation material.

6. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, A temperature sensor is installed on the outlet pipe of the heat medium.

7. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, A flow meter is installed on the outlet pipe of the heat medium.

8. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, A liquid level gauge is installed inside the medium storage tank.

9. The waste gas emission combustion heat energy recovery device according to claim 1, characterized in that, The medium storage tank is a water tank for a cleaning machine.

10. The waste gas emission combustion heat energy recovery device according to claim 9, characterized in that, The medium is cleaning water or cleaning oil.

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