Fuel gas concentration melting furnace capable of recycling waste heat

Abstract

The utility model discloses a gas concentration melting furnace for waste heat recovery, which belongs to the technical field of melting furnaces, one end of a gas concentration melting furnace body is provided with a feeding port, the surface of the gas concentration melting furnace body is provided with a smoke exhaust pipe, a burner and a material taking port, one end of the smoke exhaust pipe is in threaded connection with a waste heat recovery pipe, and the other end of the smoke exhaust pipe is in threaded connection with the burner. According to the fuel gas concentration melting furnace for waste heat recovery, through the arrangement of the waste heat recovery pipe and the heat exchange pipe, an existing fuel gas concentration melting furnace can be additionally installed conveniently, smoke exhaust cannot be affected, the energy consumption is reduced, and the fuel gas concentration melting furnace for waste heat recovery has the advantages that the waste heat recovery pipe and the heat exchange pipe are arranged, so that the fuel gas concentration melting furnace for waste heat recovery is more environment-friendly, energy-saving and environment-friendly. According to the waste heat recovery device, the use convenience is greatly improved, through the arrangement of the recovery pipe and the connecting flanges with different sizes at the two ends of the recovery pipe, the waste heat recovery pipe can be conveniently supported so that waste heat can be recovered, the waste heat recovery device can be conveniently connected with burners with different sizes, and the application range of the waste heat recovery device is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of melting furnace, more specifically, relate to a waste heat recovery's gas centralized melting furnace. BACKGROUND

[0002] In industrial production, often use various stoves, for example, the gas centralized melting furnace that melts metal and processes, but, the commonly used gas centralized melting furnace in waste heat recovery process, its recovery device is small in scope of application, and when recovering the flue gas waste heat, will cause the smoke outlet to be blocked, high temperature flue gas can cause scalding, bring inconvenience to use.

[0003] For example, the announcement number CN204987903U discloses a kind of gas centralized melting furnace with energy-saving waste heat recovery device, it includes gas centralized melting furnace body, it further includes an energy-saving waste heat recovery device, the energy-saving waste heat recovery device is fixed on the exhaust port of this gas centralized melting furnace body.

[0004] From the above-mentioned disclosure scheme, it can be known that the discharge port of energy-saving waste heat recovery device is arranged, when discharging high-temperature flue gas, flue gas is affected by the fan to block smoke, at the same time, it can cause high-temperature scalding of the fan, thereby causing damage to the fan, and different melting furnaces have different burner sizes, when connecting waste heat recovery pipeline, different size pipelines are needed, which reduces its scope of application. UTILITY MODEL CONTENT

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a waste heat recovery gas centralized melting furnace, the waste heat recovery gas centralized melting furnace is provided with waste heat recovery pipe and heat exchange pipe, which not only facilitates the installation of existing gas centralized melting furnace, but also does not affect the smoke exhaust, greatly improves the use convenience, and the recovery pipe and the different size connection flanges at both ends of the recovery pipe are provided, which not only facilitates the support of waste heat recovery pipe, thereby recovering waste heat, but also facilitates the connection with burners of different sizes, and increases the scope of application.

[0006] To solve the above problems, the utility model adopts the following technical scheme.

[0007] The application discloses a waste heat recovery gas centralized melting furnace, which comprises a gas centralized melting furnace body, one end of the gas centralized melting furnace body is provided with a feeding port, the surface of the gas centralized melting furnace body is provided with an exhaust pipe, a burner and a material taking port, one end of the exhaust pipe is connected with a waste heat recovery pipe through screw connection, the inside of the waste heat recovery pipe is provided with a smoke passing hole, the smoke passing hole is provided with a heat exchange pipe, one end of the heat exchange pipe is provided with an air inlet pipe, the other end of the heat exchange pipe is detachably connected with a recovery pipe, one end of the recovery pipe is in communication with one end of the burner, one end of the waste heat recovery pipe is connected with an exhaust nozzle through bolt connection, the surface of the waste heat recovery pipe is detachably connected with a fan, the air outlet end of the fan is provided with a flow guide cover, one end of the flow guide cover is detachably connected with one end of the air inlet pipe, the waste heat recovery gas centralized melting furnace is provided with the waste heat recovery pipe and the heat exchange pipe, which is convenient for adding the existing gas centralized melting furnace, does not affect the exhaust, greatly improves the use convenience, and the recovery pipe and the connecting flanges with different sizes at the two ends of the recovery pipe are arranged, which is convenient for supporting the waste heat recovery pipe, recovering the waste heat, connecting with burners with different sizes and increasing the application range.

[0008] Further, one end of the burner is provided with a connecting plate, one end of the recovery pipe is provided with a second connecting flange, the second connecting flange is fastened with the connecting plate through bolts, and a guide hole is arranged at the center position of the second connecting flange, so that the second connecting flange is convenient for being connected with the burner with the inner diameter larger than the recovery pipe, and the application range is increased.

[0009] Further, the other end of the recovery pipe is provided with a first connecting flange, the heat exchange pipe is in a spiral shape, and the air outlet end of the heat exchange pipe is provided with a connecting seat. The connecting seat and the first connecting flange are fastened through bolts, the heat exchange pipe is made of heat-conducting metal, the air flow time in the waste heat recovery pipe can be increased, and the heat exchange effect is improved.

[0010] Further, the two ends of the waste heat recovery pipe are provided with axially symmetric connecting holes, one end of the two connecting holes is in communication with the smoke passing hole, and the outer side of the connecting hole is provided with annular equidistant bolt holes, so that the waste heat recovery pipe is convenient for being connected with the existing exhaust pipe.

[0011] Further, one end of the flow guide cover is provided with a plug hole, the inner wall of the plug hole is provided with a sealing element, the inner wall of the sealing element is in contact with the surface of the air inlet pipe and is extruded, the sealing element is a high-temperature-resistant rubber element, the air inlet pipe and the fan are convenient for being quickly assembled and disassembled.

[0012] Further, the surface of the material taking port is provided with a cover plate, and the surface of the cover plate is provided with a handle.

[0013] Further, the surface of the waste heat recovery pipe is provided with two pipe holes, facilitating the heat exchange pipe to extend out of the waste heat recovery pipe at both ends.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) The waste heat recovery pipe and the heat exchange pipe are arranged, which facilitates the existing gas centralized melting furnace to be additionally provided, does not affect the smoke exhaust, and greatly improves the use convenience.

[0016] (2) The recovery pipe and the connecting flanges with different sizes at both ends of the recovery pipe are arranged, which facilitates the waste heat recovery pipe to be supported, recovers the waste heat, facilitates the connection with burners with different sizes, and increases the application range. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the overall structure of the utility model;

[0018] Figure 2 It is a front view of the waste heat recovery pipe structure of the utility model;

[0019] Figure 3 It is Figure 2 a sectional view of the waste heat recovery pipe and the air inlet pipe installation structure;

[0020] Figure 4 It is Figure 3 a perspective view of the waste heat recovery pipe structure;

[0021] Figure 5 It is Figure 1 a perspective view of the recovery pipe structure.

[0022] REFERENCE NUMERALS IN DRAWINGS:

[0023] 1, gas centralized melting furnace body, 11, feeding port, 12, smoke exhaust pipe, 13, burner, 14, material taking port, 15, cover plate, 2, waste heat recovery pipe, 21, smoke hole, 22, connecting hole, 23, pipe hole, 3, heat exchange pipe, 31, air inlet pipe, 32, recovery pipe, 33, guide hole, 34, first connecting flange, 35, second connecting flange, 4, smoke outlet, 5, fan, 51, flow guide cover. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Embodiment 1

[0026] Please refer to Figures 1-5 A waste heat recovery gas melting furnace, comprising a gas melting furnace body 1, which belongs to the prior art and is used for metal melting, the structure and working principle thereof are well known to those skilled in the art and will not be described in detail here. One end of the gas melting furnace body 1 is provided with a feeding port 11. The surface of the gas melting furnace body 1 is provided with a smoke exhaust pipe 12, a burner 13 and a material taking port 14. The surface of the material taking port 14 is provided with a cover plate 15. The surface of the cover plate 15 is provided with a handle. One end of the smoke exhaust pipe 12 is threadedly connected with a waste heat recovery pipe 2. The surface of the waste heat recovery pipe 2 is provided with two pipe holes 23, facilitating the extension of both ends of a heat exchange pipe 3 out of the waste heat recovery pipe 2. The inside of the waste heat recovery pipe 2 is provided with a smoke passing hole 21. The heat exchange pipe 3 is arranged in the smoke passing hole 21. One end of the heat exchange pipe 3 is provided with an air inlet pipe 31. The other end of the heat exchange pipe 3 is detachably connected with a recovery pipe 32. One end of the recovery pipe 32 is in communication with one end of the burner 13. One end of the waste heat recovery pipe 2 is connected with an air outlet nozzle 4 through a bolt. The air outlet nozzle 4 is provided with a connecting flange at one end, which can be connected with a pipeline, facilitating the purification and filtration treatment of the flue gas after waste heat recovery. The surface of the waste heat recovery pipe 2 is detachably connected with a fan 5. The fan 5 belongs to the prior art and can draw external air into the air inlet pipe 31. The air outlet end of the fan 5 is provided with a flow guide cover 51. One end of the flow guide cover 51 is detachably connected with one end of the air inlet pipe 31.

[0027] One end of the burner 13 is provided with a connecting plate. One end of the recovery pipe 32 is provided with a second connecting flange 35. The second connecting flange 35 is fastened with the connecting plate through a bolt. A guide hole 33 is arranged at the center position of the second connecting flange 35. The second connecting flange 35 is convenient for being connected with the burner 13 whose inner diameter is larger than that of the recovery pipe 32, increasing the application range. The other end of the recovery pipe 32 is provided with a first connecting flange 34. The heat exchange pipe 3 is in a spiral shape. The air outlet end of the heat exchange pipe 3 is provided with a connecting seat. The connecting seat and the first connecting flange 34 are fastened through a bolt. The heat exchange pipe 3 is made of a heat-conducting metal, which can increase the flow time of air in the waste heat recovery pipe 3, thereby improving the heat exchange effect.

[0028] Both ends of the waste heat recovery pipe 2 are provided with axially symmetrical connecting holes 22, and one end of each of the two connecting holes 22 is in communication with the smoke passing hole 21. The outer side of the connecting hole 22 is provided with annular equidistantly distributed bolt holes, facilitating the connection of the waste heat recovery pipe 2 with the existing smoke exhaust pipe 12. One end of the flow guide cover 51 is provided with a insertion hole. The inner wall of the insertion hole is provided with a sealing element. The inner wall of the sealing element is in contact with the surface of the air inlet pipe 31 and is extruded. The sealing element is a high-temperature-resistant rubber element, facilitating the quick assembly and disassembly of the air inlet pipe 31 and the fan 5.

[0029] The waste heat recovery gas centralized melting furnace in use, high temperature flue gas through the exhaust pipe 12 into the waste heat recovery pipe 2, while the fan 5 work will external air into the air inlet pipe 31 and then through the air inlet pipe 31 into the heat pipe 3, the high temperature flue gas and heat pipe 3 contact heat exchange, thereby heating the internal air, heated air under the action of blowing force into the recovery pipe 32, then through the burner 13 recovery gas centralized melting furnace body 1 into the recycling, and through the heat exchange after the flue gas into the right into the smoke nozzle 4, then through the conveying pipeline into the flue gas purification device purification filtration and emission to the outside air, by setting the waste heat recovery pipe 2 and heat pipe 3, not only convenient for the existing gas centralized melting furnace for add, moreover will not affect the exhaust, greatly improve the use convenience, and by setting the recovery pipe 32 and recovery pipe 32 two end size different connecting flange, not only convenient for the waste heat recovery pipe 2 support, so as to carry out the waste heat recovery, and convenient for the connection with different size of the burner 13, increase its scope of application.

[0030] The above, only for the preferred specific embodiments of the present application; but the scope of the present application is not limited to this. Any skilled in the art of the technical personnel in the present application disclosed in the technical range, according to the technical scheme of the present application and its improvement concept to replace or change, should be covered in the scope of the present application.

Claims

1. A gas-fired centralized melting furnace for waste heat recovery, comprising a gas-fired centralized melting furnace body (1), one end of the gas-fired centralized melting furnace body (1) being provided with a feeding port (11), a surface of the gas-fired centralized melting furnace body (1) being provided with a smoke exhaust pipe (12), a burner (13) and a material taking port (14), and characterized in that: One end of the exhaust pipe (12) is connected to the waste heat recovery pipe (2) through a thread, a smoke hole (21) is provided inside the waste heat recovery pipe (2), a heat exchange pipe (3) is provided in the smoke hole (21), one end of the heat exchange pipe (3) is provided with an air intake pipe (31), the other end of the heat exchange pipe (3) is detachably connected to a recovery pipe (32), one end of the recovery pipe (32) is communicated with one end of the burner (13), one end of the waste heat recovery pipe (2) is connected to a smoke outlet (4) through a bolt, a fan (5) is detachably connected to the surface of the waste heat recovery pipe (2), an air outlet end of the fan (5) is provided with a flow deflector (51), and one end of the flow deflector (51) is detachably connected to one end of the air intake pipe (31).

2. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: A connecting plate is provided at one end of the burner (13), and a second connecting flange (35) is provided at one end of the recovery pipe (32). The second connecting flange (35) is fastened to the connecting plate by bolts, and a guide hole (33) is provided at the center of the second connecting flange (35).

3. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: The other end of the recovery pipe (32) is provided with a first connecting flange (34), the shape of the heat exchange pipe (3) is spiral, and the air outlet end of the heat exchange pipe (3) is provided with a connecting seat, and the connecting seat and the first connecting flange (34) are fastened by bolts.

4. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: Axially symmetrical connecting holes (22) are provided at both ends of the waste heat recovery pipe (2), and one end of each of the two connecting holes (22) is connected to the smoke vent (21). An annular bolt hole equidistantly distributed is provided on the outside of the connecting hole (22).

5. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: One end of the air guide cover (51) is provided with an insertion hole, the inner wall of the insertion hole is provided with a sealing member, and the inner wall of the sealing member contacts and presses against the surface of the air intake pipe (31).

6. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: A cover plate (15) is provided on the surface of the material taking port (14), and a handle is provided on the surface of the cover plate (15).

7. The gas-fired centralized melting furnace with waste heat recovery according to claim 1, characterized in that: Two tube holes (23) are provided on the surface of the waste heat recovery tube (2).

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