A hot blast stove with high heat exchange efficiency

Abstract

The utility model relates to hot -blast stove technical field discloses a high heat exchange efficiency hot -blast stove, including hot -blast stove shell, the inside of hot -blast stove shell is provided with the cavity, the inside of cavity is filled with the heat preservation layer, the surface fixedly connected with extension board of hot -blast stove shell, the top fixedly connected with the air -blower of extension board. The utility model discloses through gas combustor ignition gas, produces high temperature flame and carries out heating to the inside of hot -blast stove shell, and the air -blower passes through the air introduction into the inside of air -inlet disc through the connecting pipe, and then the air in the inside of air -inlet disc enters the inside of heat exchange pipe, because the surface of heat exchange pipe and the inner wall of hot -blast stove shell contact, absorb the heat of hot -blast stove shell inner wall, and the heat transfer efficiency is high, reduces the heat loss, and the bottom of heat exchange disc and the combustion flame of gas combustor directly contact, improves the temperature of heat exchange disc, and fixed pipe is located in the inside of heat exchange disc, makes air can heat up quickly.

Description

Technical Field

[0001] This utility model relates to the field of hot blast stove technology, and in particular to a hot blast stove with high heat exchange efficiency. Background Technology

[0002] A hot air furnace is a device used to heat air to a high temperature. It produces high-temperature flue gas by burning fuel (such as coal gas, natural gas, or coal), and then exchanges heat between the flue gas and air to heat the air to the required temperature. It is widely used in industrial production and other fields.

[0003] During the heating process, the inner wall of the hot blast stove reaches a high temperature. However, since most of the heat exchange tubes are not in direct contact with the inner wall of the hot blast stove, the heat of the inner wall of the hot blast stove cannot be transferred to the air inside the heat exchange tubes. Some of the heat will dissipate to the outside along the outer wall of the jacket, resulting in heat waste and affecting the heat exchange efficiency. Therefore, we propose a hot blast stove with high heat exchange efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a hot air furnace with high heat exchange efficiency.

[0005] This utility model is achieved using the following technical solution: a hot air furnace with high heat exchange efficiency, comprising a hot air furnace shell, an interior cavity provided inside the hot air furnace shell, the interior of the cavity being filled with a heat insulation layer, an extension plate fixedly connected to the surface of the hot air furnace shell, a blower fixedly connected to the top of the extension plate, a connecting pipe connected to the left end of the blower, a support column fixedly connected to the bottom of the hot air furnace shell, a gas burner fixedly connected to the bottom of the hot air furnace shell, a heat exchange plate provided inside the hot air furnace shell, a fixed pipe provided inside the heat exchange plate, an exhaust pipe connected to one end of the fixed pipe, an air inlet plate connected to the end of the connecting pipe away from the blower, and a heat exchange tube connected to the inner wall of the air inlet plate.

[0006] The above technical solution involves igniting gas through a gas burner to generate a high-temperature flame that heats the interior of the hot air furnace shell. A blower introduces air into the air inlet plate through a connecting pipe, and the air inside the air inlet plate then enters the heat exchange tube. Since the surface of the heat exchange tube is in contact with the inner wall of the hot air furnace shell, it absorbs heat from the inner wall of the hot air furnace shell, resulting in high heat transfer efficiency and improved heat exchange efficiency. The insulation layer is made of rock wool, which has good thermal insulation properties and reduces heat loss.

[0007] As a further improvement to the above solution, the number of support columns is set to three, and the three support columns are arranged in a circle around the outer shell of the hot blast furnace.

[0008] The above technical solution uses three support columns to support the outer shell of the hot blast furnace, ensuring stability during use.

[0009] As a further improvement to the above scheme, the burner head of the gas burner extends into the interior of the hot air furnace shell, and the bottom of the heat exchange plate is fixedly connected to the bottom of the inner wall of the hot air furnace shell.

[0010] Through the above technical solution, the bottom of the heat exchange plate is in direct contact with the combustion flame of the gas burner, which increases the temperature of the heat exchange plate, reduces heat loss, and improves heat exchange efficiency.

[0011] As a further improvement to the above solution, the surface of the exhaust pipe is fixedly connected to the inner wall of the heat exchange plate, and the inner wall of the air inlet plate is fixedly connected to the surface of the exhaust pipe.

[0012] With the above technical solution, when the heat inside the exhaust pipe flows to the air inlet plate, it will heat the air inlet plate, thereby heating the cavity inside the air inlet plate that is subsequently introduced into it.

[0013] As a further improvement to the above solution, the top of the exhaust pipe extends to the outside of the hot blast furnace shell and is fixedly connected to a flange.

[0014] The above technical solution facilitates connection with external pipelines via flanges, improving the ease of installation during use.

[0015] As a further improvement to the above scheme, the end of the heat exchange tube away from the air inlet plate extends into the interior of the heat exchange plate and communicates with the fixed pipe, and the surface of the heat exchange tube contacts the inner wall of the hot air furnace shell.

[0016] With the above technical solution, the fixed tube is located inside the heat exchange plate, which makes the temperature of the fixed tube higher, thereby improving the heat exchange efficiency.

[0017] As a further improvement to the above scheme, the fixed tube is U-shaped, and the number of both the fixed tube and the heat exchange tube is five.

[0018] The above technical solution increases the heat exchange area by using five fixed tubes and heat exchange tubes, thereby improving the heat exchange efficiency.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention utilizes a heat exchange plate, a fixed pipe, an exhaust pipe, an air inlet plate, and a heat exchange tube. A gas burner ignites the gas, generating a high-temperature flame that heats the interior of the hot air furnace shell. A blower introduces air into the air inlet plate via a connecting pipe. The air inside the air inlet plate then enters the heat exchange tube. Because the surface of the heat exchange tube is in contact with the inner wall of the hot air furnace shell, it absorbs heat from the inner wall, resulting in high heat transfer efficiency and reduced heat loss. The bottom of the heat exchange plate is in direct contact with the combustion flame of the gas burner, increasing the temperature of the heat exchange plate. Furthermore, the fixed pipe is located inside the heat exchange plate, allowing the air to heat up rapidly.

[0021] This utility model, by setting up a heat exchange plate, a fixed pipe and an air inlet plate, and by using a U-shaped fixed pipe, extends the time that the air flows inside the fixed pipe, increases the heat exchange area and further improves the heat exchange efficiency. When the hot air inside the exhaust pipe passes the position of the air inlet plate, it will heat the air inlet plate, so that the newly introduced air will be preheated in advance, thereby improving the subsequent heat exchange efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the present invention.

[0024] Figure 3 This is a schematic diagram of the heat exchanger plate connection structure of this utility model;

[0025] Figure 4 This utility model Figure 2 Enlarged structural diagram of section A in the middle;

[0026] Figure 5 This is a schematic diagram of the exhaust pipe connection structure of this utility model.

[0027] Explanation of key symbols:

[0028] 1. Hot air furnace shell; 2. Insulation layer; 3. Extension plate; 4. Blower; 5. Connecting pipe; 6. Support column; 7. Gas burner; 8. Heat exchange plate; 9. Fixed pipe; 10. Exhaust pipe; 11. Air inlet plate; 12. Heat exchange tube; 13. Flange. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] Example:

[0031] Please combine Figure 1-5This embodiment of a high-efficiency hot air furnace includes a hot air furnace shell 1, an interior cavity filled with an insulation layer 2, an extension plate 3 fixedly connected to the surface of the hot air furnace shell 1, a blower 4 fixedly connected to the top of the extension plate 3, a connecting pipe 5 connected to the left end of the blower 4, a support column 6 fixedly connected to the bottom of the hot air furnace shell 1, a gas burner 7 fixedly connected to the bottom of the hot air furnace shell 1, a heat exchange plate 8 inside the hot air furnace shell 1, a fixing pipe 9 inside the heat exchange plate 8, an exhaust pipe 10 connected to one end of the fixing pipe 9, and a connecting pipe 5 connected to the exhaust pipe 10. An air inlet plate 11 is connected to one end of the blower 4. A heat exchange tube 12 is connected to the inner wall of the air inlet plate 11 and is connected to an external pipeline through a flange 13. When the blower 4 and the gas burner 7 are started, the gas burner 7 ignites the gas and generates a high-temperature flame to heat the inside of the hot air furnace shell 1. The blower 4 introduces air into the inside of the air inlet plate 11 through the connecting pipe 5. The air inside the air inlet plate 11 then enters the inside of the heat exchange tube 12. Since the surface of the heat exchange tube 12 is in contact with the inner wall of the hot air furnace shell 1, it absorbs the heat from the inner wall of the hot air furnace shell 1, resulting in high heat transfer efficiency and reduced heat loss.

[0032] There are three support columns 6, which are arranged in a circle around the outer shell 1 of the hot blast furnace.

[0033] The burner head of the gas burner 7 extends into the interior of the hot air furnace shell 1. The bottom of the heat exchange plate 8 is fixedly connected to the bottom of the inner wall of the hot air furnace shell 1. The bottom of the heat exchange plate 8 is in direct contact with the combustion flame of the gas burner 7, which increases the temperature of the heat exchange plate 8. The fixed pipe 9 is located inside the heat exchange plate 8, which allows the air to heat up quickly.

[0034] The surface of the exhaust pipe 10 is fixedly connected to the inner wall of the heat exchange plate 8, and the inner wall of the air inlet plate 11 is fixedly connected to the surface of the exhaust pipe 10.

[0035] The top of the exhaust pipe 10 extends to the outside of the hot air furnace shell 1 and is fixedly connected to a flange 13, which facilitates connection to external pipes.

[0036] The end of the heat exchange tube 12 away from the air inlet plate 11 extends into the interior of the heat exchange plate 8 and is connected to the fixed pipe 9. The surface of the heat exchange tube 12 is in contact with the inner wall of the hot air furnace shell 1. When the hot air inside the exhaust pipe 10 passes through the position of the air inlet plate 11, it will heat the air inlet plate 11, so that the newly introduced air will be preheated in advance, thereby improving the subsequent heat exchange efficiency.

[0037] The fixed tube 9 is U-shaped, and there are five fixed tubes 9 and five heat exchange tubes 12. Because the fixed tube 9 is U-shaped, the time for air to flow inside the fixed tube 9 is extended, the heat exchange area is increased, and the heat exchange efficiency is further improved.

[0038] The implementation principle of a high-efficiency hot air furnace in this embodiment is as follows: During use, it is connected to an external pipeline via flange 13. The blower 4 and gas burner 7 are started. The gas burner 7 ignites the gas, generating a high-temperature flame to heat the interior of the hot air furnace shell 1. The blower 4 introduces air into the air inlet plate 11 via connecting pipe 5. The air inside the air inlet plate 11 then enters the heat exchange tube 12. Because the surface of the heat exchange tube 12 is in contact with the inner wall of the hot air furnace shell 1, it absorbs heat from the inner wall, resulting in high heat transfer efficiency and reduced heat loss. The air then enters the fixed pipe 9. Inside the heat exchange plate 8, the U-shaped fixed pipe 9 extends the air flow time inside the fixed pipe 9, increases the heat exchange area, and further improves the heat exchange efficiency. The bottom of the heat exchange plate 8 is in direct contact with the combustion flame of the gas burner 7, which increases the temperature of the heat exchange plate 8. The fixed pipe 9 is located inside the heat exchange plate 8, which allows the air to heat up quickly. Then, the hot air is discharged into the external pipeline through the exhaust pipe 10 and delivered to the area that needs to be heated. When the hot air inside the exhaust pipe 10 passes the position of the air inlet plate 11, it will heat the air inlet plate 11, so that the newly introduced air will be preheated, thereby improving the subsequent heat exchange efficiency.

[0039] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A hot air furnace with high heat exchange efficiency, characterized in that, The device includes a hot air furnace shell (1), the hot air furnace shell (1) has an internal cavity, the internal cavity is filled with a heat insulation layer (2), an extension plate (3) is fixedly connected to the surface of the hot air furnace shell (1), a blower (4) is fixedly connected to the top of the extension plate (3), a connecting pipe (5) is connected to the left end of the blower (4), a support column (6) is fixedly connected to the bottom of the hot air furnace shell (1), a gas burner (7) is fixedly connected to the bottom of the hot air furnace shell (1), a heat exchange plate (8) is provided inside the hot air furnace shell (1), a fixed pipe (9) is provided inside the heat exchange plate (8), an exhaust pipe (10) is connected to one end of the fixed pipe (9), an air inlet plate (11) is connected to the end of the connecting pipe (5) away from the blower (4), and a heat exchange pipe (12) is connected to the inner wall of the air inlet plate (11).

2. A hot blast stove with high heat exchange efficiency as described in claim 1, characterized in that: The number of the support columns (6) is three, and the three support columns (6) are arranged in a circle around the hot blast furnace shell (1).

3. A hot blast stove with high heat exchange efficiency as described in claim 1, characterized in that: The burner head of the gas burner (7) extends into the interior of the hot air furnace shell (1), and the bottom of the heat exchange plate (8) is fixedly connected to the bottom of the inner wall of the hot air furnace shell (1).

4. A hot blast stove with high heat exchange efficiency as described in claim 1, characterized in that: The surface of the exhaust pipe (10) is fixedly connected to the inner wall of the heat exchange plate (8), and the inner wall of the air inlet plate (11) is fixedly connected to the surface of the exhaust pipe (10).

5. A hot blast stove with high heat exchange efficiency as described in claim 4, characterized in that: The top of the exhaust pipe (10) extends to the outside of the hot air furnace shell (1) and is fixedly connected to a flange (13).

6. A hot blast stove with high heat exchange efficiency as described in claim 1, characterized in that: The end of the heat exchange tube (12) away from the air inlet plate (11) extends into the interior of the heat exchange plate (8) and communicates with the fixed pipe (9). The surface of the heat exchange tube (12) is in contact with the inner wall of the hot air furnace shell (1).

7. A hot blast stove with high heat exchange efficiency as described in claim 6, characterized in that: The fixed tube (9) is U-shaped, and there are five of each of the fixed tube (9) and the heat exchange tube (12).

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