Waste heat recovery device for heating furnace

Abstract

The utility model discloses a waste heat recovery device for a heating furnace, which comprises a heat exchange chamber, a heat exchange mother pipe is fixedly connected in the heat exchange chamber, two circulation chambers arranged up and down are formed in the heat exchange mother pipe through a partition plate, and a plurality of heat exchange pipes are uniformly and fixedly connected on the outer side of the heat exchange mother pipe. Inlet and outlet pipes extending to the outer side of the heat exchange chamber are arranged at the two ends of the two circulation chambers; the two ends of the heat exchange chamber are fixedly connected with a gas conveying pipe and an exhaust pipe of an L-shaped structure correspondingly, one side of the gas conveying pipe is fixedly connected with a gas inlet pipe, a mounting plate is slidably connected to the position, located above the gas inlet pipe, in the gas conveying pipe, a filter plate is embedded in the mounting plate, and two connecting rods are symmetrically and fixedly connected to the bottom of the mounting plate; a bottom cover is installed at the bottom of the air conveying pipe, and the bottom of the connecting plate is installed at the bottom of the inner wall of the bottom cover. By means of the structure, efficient recovery and reutilization of waste heat of hot air are achieved, the energy utilization efficiency is improved, and environmental protection, energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, in particular to a waste heat recovery device for heating furnaces. Background Art

[0002] During the production process of the heating furnace, a certain amount of heat energy will be discharged in the form of flue gas. The waste heat contained in the flue gas can be recycled through heat exchange technology to achieve the purpose of energy saving and reducing pollution emissions.

[0003] In the prior art, after searching, it was found that a Chinese patent disclosed "a waste heat recovery device for a heating furnace", and its application number is "202021935616.5". The above patent mainly includes a placement plate, a waste heat recovery device is provided on the left side of the top of the placement plate, the top of the waste heat recovery device is connected to a hot gas outlet, the inner cavity of the waste heat recovery device is provided with a heat exchange pipe, one end of the heat exchange pipe passes through and extends to the left side of the waste heat recovery device, and the other end of the heat exchange pipe passes through and extends to the right side of the waste heat recovery device. A water tank is provided on the right side of the top of the placement plate, and an air suction machine is provided on the left side of the water tank. The input end of the air suction machine is provided with an air suction pipe, the left side of the air suction pipe is connected to the heat exchange pipe, and the output end of the air suction machine is connected to an air outlet pipe. Although the above utility model can filter and discharge hot gas when the waste heat recovery device is in use, it can filter and discharge hot gas. However, the above-mentioned device is inefficient in utilizing the waste heat from the flue gas of the heating furnace. Furthermore, the flue gas from the heating furnace contains a portion of soot, which directly enters the heat exchange tubes for heat exchange. This can easily clog the heat exchange tubes over time, affecting the heat exchange efficiency and hindering maximization of the heat exchange effect. Furthermore, the curved heat exchange tubes make cleaning more difficult, resulting in poor practicality. Therefore, the present invention provides a waste heat recovery device for a heating furnace to address the problems raised in the above-mentioned background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat recovery device for a heating furnace, which realizes the efficient recovery and reuse of the waste heat of the high-temperature hot gas discharged by the heating furnace, improves the energy utilization efficiency, and contributes to environmental protection and energy conservation and emission reduction; and under the action of the filter plate, the incoming hot gas can be filtered to remove large particles of impurities therein and protect subsequent heat exchange equipment.

[0005] To achieve the above-mentioned object, a waste heat recovery device for a heating furnace is provided, comprising a heat exchange chamber, wherein a heat exchange main pipe is fixedly connected to the interior of the heat exchange chamber, and two flow chambers arranged one above the other are formed inside the heat exchange main pipe by a partition plate, and a plurality of heat exchange pipes are evenly fixedly connected to the outside of the heat exchange main pipe, and both ends of the two flow chambers are provided with inlet and outlet pipes extending to the outside of the heat exchange chamber;

[0006] The two ends of the heat exchange chamber are respectively fixedly connected with an L-shaped air supply pipe and an exhaust pipe, one side of the air supply pipe is fixedly connected with an air intake pipe, a mounting plate is slidably connected inside the air supply pipe and above the air intake pipe, a filter plate is embedded in the mounting plate, two connecting rods are symmetrically fixedly connected to the bottom of the mounting plate, the bottom of the two connecting rods are commonly fixedly connected to a connecting plate, a bottom cover is installed at the bottom of the air supply pipe, and the bottom of the connecting plate is installed at the bottom of the inner wall of the bottom cover.

[0007] According to the waste heat recovery device for a heating furnace, the bottom cover is screwed and connected to the bottom of the gas pipe, and the connecting plate is rotatably connected to the bottom cover.

[0008] According to the waste heat recovery device for a heating furnace, a heat insulation layer is provided on the outside of the heat exchange chamber.

[0009] According to the waste heat recovery device for a heating furnace, the transverse positions of the heat exchange tubes are staggered.

[0010] According to the waste heat recovery device for a heating furnace, the bottom of the partition is set to a V-shaped structure, wherein the inlet and outlet pipes located above are set in the middle of the V-shaped structure.

[0011] According to the waste heat recovery device for a heating furnace, the openings of the heat exchange tubes located above the partition are all located above the partition.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the existing technology, this waste heat recovery device for heating furnaces can achieve efficient recovery and reuse of waste heat from high-temperature hot gas discharged from heating furnaces, improve energy utilization efficiency, and contribute to environmental protection and energy conservation and emission reduction;

[0014] 2. Compared with existing technologies, this waste heat recovery device for heating furnaces filters incoming hot air through the filter plate to remove large impurities and protect subsequent heat exchange equipment. Furthermore, the filter plate can be cleaned or replaced without disassembling the entire gas pipeline, greatly improving the maintenance convenience of the equipment.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a first overall structural diagram of a waste heat recovery device for a heating furnace according to the present invention;

[0018] Figure 2 This is a second overall structural diagram of a waste heat recovery device for a heating furnace according to the present invention;

[0019] Figure 3 This is a schematic diagram of the main cross-sectional structure of a waste heat recovery device for a heating furnace according to the present invention;

[0020] Figure 4 This utility model is a waste heat recovery device for a heating furnace Figure 3 A in the middle is an enlarged structural diagram;

[0021] Figure 5 This is a schematic diagram of the partition structure of a waste heat recovery device for a heating furnace in the utility model.

[0022] Legend:

[0023] 1. Heat exchange chamber; 2. Gas transmission pipe; 3. Exhaust pipe; 4. Heat exchange main pipe; 5. Partition; 6. Circulation chamber; 7. Inlet and outlet pipes; 8. Connecting plate; 9. Heat exchange tube; 10. Inlet pipe; 11. Insulation layer; 12. Bottom cover; 13. Mounting plate; 14. Filter plate; 15. Connecting rod. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] Reference Figure 1-5 The embodiment of the utility model is a waste heat recovery device for a heating furnace, which includes a heat exchange chamber 1. An insulation layer 11 is provided on the outside of the heat exchange chamber 1 to reduce heat loss in the heat exchange chamber 1. A heat exchange main pipe 4 is fixedly connected to the inside of the heat exchange chamber 1. Two flow chambers 6 arranged vertically are formed inside the heat exchange main pipe 4 through a partition 5. A plurality of heat exchange tubes 9 are evenly fixedly connected to the outside of the heat exchange main pipe 4. Both ends of the two flow chambers 6 are provided with inlet and outlet pipes 7 extending to the outside of the heat exchange chamber 1. The bottom of the partition 5 is set as a V-shaped structure, wherein the inlet and outlet pipe 7 located above is set in the middle of the V-shaped structure to ensure that hot water can completely leave the flow chamber 6 through the inlet and outlet pipes 7.

[0026] During operation, the upper circulation chamber 6 serves as a cold water circulation channel. A valve can be installed on the outside of the inlet and outlet pipes 7 to control the opening and closing of the inlet and outlet pipes 7. Cold water flows from one inlet and outlet pipe 7 into the circulation chamber 6, ensuring that the other inlet and outlet pipe 7 is disconnected. The cold water then fills the interior of the heat exchange main pipe 4 and the heat exchange tubes 9. As the hot air flows within the heat exchange chamber 1, it fully exchanges heat with the cold water within the heat exchange tubes 9, heating the cold water. The heated hot water is then discharged through the inlet and outlet pipes 7 and can be used for heating and other purposes. The lower circulation chamber 6 serves as an air circulation channel. Air flows from the inlet and outlet pipes 7 into the circulation chamber 6 and the interior of the heat exchange tubes 9, where the hot air fully exchanges heat with the cold air within the heat exchange tubes 9, preheating the air. The preheated air is transported through the inlet and outlet pipes 7 to the heating furnace to assist combustion, improving the furnace's combustion efficiency and reducing fuel consumption. At the same time, depending on actual usage needs, such as during non-cold seasons when heating is not required, the upper circulation chamber 6 can also be used to preheat the air, meeting the needs of different seasons and working conditions. This overall system achieves efficient recovery and reuse of the waste heat from the high-temperature hot gas discharged by the heating furnace, improving energy utilization efficiency and contributing to environmental protection, energy conservation and emission reduction.

[0027] The two ends of the heat exchange chamber 1 are respectively fixedly connected with an L-shaped air supply pipe 2 and an exhaust pipe 3. One side of the air supply pipe 2 is fixedly connected with an air inlet pipe 10. A mounting plate 13 is slidably connected inside the air supply pipe 2 and above the air inlet pipe 10. A filter plate 14 is embedded in the mounting plate 13. Two connecting rods 15 are symmetrically fixedly connected to the bottom of the mounting plate 13. The bottom of the two connecting rods 15 are commonly fixedly connected to a connecting plate 8. A bottom cover 12 is installed at the bottom of the air supply pipe 2. The bottom cover 12 is screwed together with the bottom of the air supply pipe 2. The bottom of the connecting plate 8 is installed at the bottom of the inner wall of the bottom cover 12, and the connecting plate 8 is rotatably connected to the bottom cover 12.

[0028] Hot air from the heating furnace is transported into the heat exchange chamber 1 through the air inlet pipe 10 and the air delivery pipe 2. After completing heat exchange with the heat exchange main pipe 4, it is discharged through the exhaust pipe 3. As the hot air flows from the air inlet pipe 10 into the air delivery pipe 2, it is filtered by the filter plate 14 to remove large particles and protect the subsequent heat exchange equipment. The mounting plate 13 and filter plate 14 can be easily removed by rotating the bottom cover 12. The filter plate 14 can be cleaned or replaced without disassembling the entire air delivery pipe 2, greatly improving the maintenance convenience of the equipment.

[0029] The heat exchange tubes 9 are staggered in their transverse positions to reduce the flow resistance of hot air in the heat exchange chamber 1, allowing the hot air to better contact the outside of the heat exchange tubes 9. The openings of the heat exchange tubes 9 above the partition 5 are all located above the partition 5 to ensure that the heat exchange tubes 9 above the partition 5 are all arranged at an angle, which facilitates the automatic outflow of hot water inside the heat exchange tubes 9.

[0030] Working Principle: During operation, the upper circulation chamber 6 serves as a cold water circulation channel. Valves can be installed on the outside of the inlet and outlet pipes 7 to control the opening and closing of the inlet and outlet pipes 7. Cold water flows into the circulation chamber 6 from one inlet and outlet pipe 7, ensuring that the other inlet and outlet pipe 7 is disconnected. Cold water then fills the heat exchange main pipe 4 and the heat exchange tubes 9. As the hot air flows within the heat exchange chamber 1, it fully exchanges heat with the cold water within the heat exchange tubes 9, heating the cold water. The heated hot water is then discharged through the inlet and outlet pipes 7 and can be used for heating and other purposes. The lower circulation chamber 6 serves as an air circulation channel. Air flows from the inlet and outlet pipes 7 into the circulation chamber 6 and the heat exchange tubes 9, where the hot air fully exchanges heat with the cold air within the heat exchange tubes 9, preheating the air. The preheated air is transported through the inlet and outlet pipes 7 to the heating furnace to assist combustion, improving the furnace's combustion efficiency and reducing fuel consumption. At the same time, according to actual usage needs, such as when heating is not required during non-cold seasons, the upper circulation chamber 6 can also be used to preheat the air, meeting the usage needs in different seasons and working conditions. The overall system achieves efficient recovery and reuse of the high-temperature hot gas waste heat emitted by the heating furnace, improves energy utilization efficiency, and contributes to environmental protection and energy conservation and emission reduction;

[0031] As hot air flows from the intake pipe 10 into the air delivery pipe 2, the filter plate 14 filters the incoming hot air to remove large impurities and protect the subsequent heat exchange equipment. The mounting plate 13 and filter plate 14 can be easily removed by rotating the bottom cover 12. The filter plate 14 can be cleaned or replaced without disassembling the entire air delivery pipe 2, greatly improving the maintenance convenience of the equipment.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A waste heat recovery device for a heating furnace, characterized in that: The heat exchange chamber (1) comprises a heat exchange main pipe (4) fixedly connected to the interior of the heat exchange main pipe (1), two upper and lower flow chambers (6) are formed in the interior of the heat exchange main pipe (4) through a partition (5), a plurality of heat exchange pipes (9) are evenly fixedly connected to the outside of the heat exchange main pipe (4), and both ends of the two flow chambers (6) are provided with inlet and outlet pipes (7) extending to the outside of the heat exchange chamber (1); The two ends of the heat exchange chamber (1) are respectively fixedly connected with an L-shaped air supply pipe (2) and an exhaust pipe (3), one side of the air supply pipe (2) is fixedly connected with an air inlet pipe (10), a mounting plate (13) is slidably connected inside the air supply pipe (2) and above the air inlet pipe (10), a filter plate (14) is embedded inside the mounting plate (13), two connecting rods (15) are symmetrically fixedly connected to the bottom of the mounting plate (13), the bottoms of the two connecting rods (15) are fixedly connected to a connecting plate (8), a bottom cover (12) is installed at the bottom of the air supply pipe (2), and the bottom of the connecting plate (8) is installed at the bottom of the inner wall of the bottom cover (12).

2. A waste heat recovery device for a heating furnace according to claim 1, characterized in that: The bottom cover (12) is screwed and connected to the bottom of the gas pipe (2), and the connecting plate (8) is rotatably connected to the bottom cover (12).

3. The waste heat recovery device for a heating furnace according to claim 2, characterized in that: A heat-insulating layer (11) is provided on the outside of the heat exchange chamber (1).

4. The waste heat recovery device for a heating furnace according to claim 3, characterized in that: The heat exchange tubes (9) are arranged in a staggered manner in transverse positions.

5. The waste heat recovery device for a heating furnace according to claim 4, characterized in that: The bottom of the partition (5) is configured as a V-shaped structure, wherein the inlet and outlet pipes (7) located above are located in the middle of the V-shaped structure.

6. The waste heat recovery device for a heating furnace according to claim 5, characterized in that: The openings of the heat exchange tubes (9) located above the partition (5) are all located above the partition (5).

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