A high-efficiency and energy-saving waste heat recovery device for industrial ovens

Abstract

This utility model relates to the field of waste heat recovery technology and discloses a high-efficiency and energy-saving industrial oven waste heat recovery device, including an oven body. An air intake mechanism for conveying air is provided above the oven body, and a waste heat recovery mechanism is provided on one side of the oven body. This utility model connects a condenser pipe in the recovery mechanism to the exhaust pipe of the oven body. During the drying process of the electrically heated industrial oven, a large amount of high-temperature air containing moisture is generated. Under the suction of an air pump, dry outside air is drawn into the oven body through a one-way valve. The high-temperature air containing a large amount of moisture generated during the drying process inside the oven body enters the condenser pipe through the exhaust pipe. Clean water outside the condenser pipe cools this high-temperature air containing a large amount of moisture, absorbing the heat from the high-temperature air and achieving preliminary waste heat recovery. During the cooling process, the moisture in the high-temperature air condenses into liquid.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically to a high-efficiency and energy-saving waste heat recovery device for industrial ovens. Background Technology

[0002] Against the backdrop of advocating energy conservation, emission reduction and sustainable development, the industrial sector, as a major energy consumer, faces enormous energy consumption pressure. Industrial furnaces are widely used in many industries such as metallurgy, chemical industry and building materials. During their operation, they generate a large amount of high-temperature waste gas, which contains abundant waste heat resources.

[0003] In the prior art, industrial ovens use electric heating to dry materials. During the drying process, a large amount of high-temperature air containing water vapor is generated. This high-temperature air carrying a large amount of moisture generally suffers from low heat utilization, and a large amount of waste heat is directly emitted into the atmosphere, causing serious energy waste, aggravating environmental thermal pollution, and increasing the production costs of enterprises. Therefore, those skilled in the art provide a high-efficiency and energy-saving industrial oven waste heat recovery device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a highly efficient and energy-saving waste heat recovery device for industrial ovens, thereby solving the problems mentioned above.

[0005] This utility model provides the following technical solution: a high-efficiency and energy-saving industrial oven waste heat recovery device, including an oven body, an air intake mechanism for conveying air is provided above the oven body, and a recovery mechanism for recovering waste heat is provided on one side of the oven body.

[0006] As a preferred embodiment of the above technical solution, the recycling mechanism includes a recycling box fixedly installed on one side of the oven body. The top of the recycling box has an air outlet, and an air outlet pipe is connected to the air outlet. One end of the air outlet pipe located inside the recycling box is connected to a connecting pipe. The end of the connecting pipe opposite to the air outlet is connected to a condenser pipe. The end of the condenser pipe opposite to the connecting pipe is connected to an exhaust pipe on the oven body. The bottom of the connecting pipe is connected to a liquid outlet pipe.

[0007] As a preferred embodiment of the above technical solution, the air intake mechanism includes a support frame fixedly connected to the top of the oven body, a cylinder fixedly connected to the top of the support frame, a piston plate fixedly connected to the output end of the cylinder through the support frame, and a one-way valve fixedly installed on the piston plate.

[0008] As a preferred embodiment of the above technical solution, the recycling bin is connected to a drain pipe.

[0009] As a preferred embodiment of the above technical solution, the top of the recycling bin is provided with a liquid inlet.

[0010] As a preferred embodiment of the above technical solution, an air inlet pipe is fixedly installed on the top of the oven body, and the piston plate is slidably attached to the inner wall of the air inlet pipe.

[0011] As a preferred embodiment of the above technical solution, an air pump is fixedly installed at the end of the air outlet pipe away from the recovery box.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention connects the condenser tube in the recovery mechanism to the exhaust pipe of the furnace body. During the drying process in an electrically heated industrial furnace, a large amount of high-temperature air containing moisture is drawn into the furnace body through a one-way valve by an air pump. The high-temperature air containing moisture generated during the drying process inside the furnace enters the condenser tube through the exhaust pipe. The clean water outside the condenser tube cools this high-temperature air, absorbing the heat and achieving initial heat recovery. During cooling, the moisture in the high-temperature air condenses into liquid and is discharged through the liquid outlet pipe at the bottom of the connecting pipe. Finally, the air, still carrying heat, is connected to a gas collection device through the exhaust pipe for combustion support in the combustion chamber of other combustion drying equipment, further recovering heat. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a high-efficiency and energy-saving industrial oven waste heat recovery device.

[0015] Figure 2 This is a schematic diagram of the exploded structure of the air intake mechanism in a high-efficiency and energy-saving industrial oven waste heat recovery device.

[0016] Figure 3 This is a cross-sectional schematic diagram of the recovery mechanism in a high-efficiency and energy-saving industrial oven waste heat recovery device.

[0017] Figure 4 This is a schematic diagram of the longitudinal section of the recovery mechanism in a high-efficiency and energy-saving industrial oven waste heat recovery device.

[0018] In the diagram: 1. Oven body; 101. Inlet pipe; 2. Recovery mechanism; 21. Recovery box; 22. Outlet; 23. Condenser pipe; 24. Outlet pipe; 25. Connecting pipe; 26. Liquid outlet pipe; 3. Inlet mechanism; 31. Support frame; 32. Cylinder; 33. Piston plate; 34. Check valve; 4. Liquid inlet; 5. Drain pipe; 6. Air pump. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figures 1-4 As shown, this utility model provides a technical solution: a high-efficiency and energy-saving industrial oven waste heat recovery device, including an oven body 1, an air inlet mechanism 3 for conveying air is provided above the oven body 1, and a waste heat recovery mechanism 2 is provided on one side of the oven body 1.

[0021] As one implementation method in this embodiment, please refer to Figures 1-4 As shown, the recycling mechanism 2 includes a recycling box 21 fixedly installed on one side of the oven body 1. The top of the recycling box 21 is provided with an air outlet 22. An air outlet pipe 24 is connected to the air outlet 22. One end of the air outlet pipe 24 located inside the recycling box 21 is connected to a connecting pipe 25. The end of the connecting pipe 25 away from the air outlet 22 is connected to a condenser pipe 23. The end of the condenser pipe 23 away from the connecting pipe 25 is connected to an exhaust pipe on the oven body 1. The bottom of the connecting pipe 25 is connected to a liquid outlet pipe 26.

[0022] In practice, the recycling box 21 is made of high-temperature and corrosion-resistant stainless steel and is fixedly installed on one side of the oven body 1 by welding process to ensure that the structure is stable and can adapt to the harsh industrial environment. The end of the condenser pipe 23 away from the connecting pipe 25 is tightly connected to the exhaust pipe on the oven body 1 through a high-temperature resistant sealing tube to ensure that the high-temperature gas containing a large amount of water vapor can be smoothly introduced. The liquid outlet pipe 26 is equipped with a valve to control the liquid discharge speed and discharge volume according to actual needs.

[0023] It should be noted that the oven body 1 is an electrically heated oven. Therefore, the high-temperature air generated by the oven body 1 during the drying process contains only moisture and does not contain the products of complete or incomplete combustion in the combustion heating and drying equipment.

[0024] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the air intake mechanism 3 includes a support frame 31 fixedly connected to the top of the oven body 1. A cylinder 32 is fixedly connected to the top of the support frame 31. A piston plate 33 is fixedly connected to the output end of the cylinder 32 through the support frame 31. A one-way valve 34 is fixedly installed on the piston plate 33.

[0025] In practice, the support frame 31 is fixed to the oven body 1 with bolts to ensure that it will not loosen during long-term operation. A cylinder 32 is fixedly connected to the top of the support frame 31. The output end of the cylinder 32 passes through the support frame 31 and is fixedly connected to a piston plate 33 through a connector. The piston plate 33 has good wear resistance and sealing performance. Its surface is specially treated to reduce friction with the inner wall of the air inlet pipe 101 of the oven body 1 and to fit against the inner wall of the air inlet pipe 101 of the oven body 1 to prevent gas from overflowing. By setting a one-way valve 34, the flow direction can be from top to bottom, which can prevent the gas in the oven body 1 from being discharged through the air inlet pipe 101.

[0026] As one implementation method in this embodiment, please refer to Figure 4 As shown, a drain pipe 5 is connected inside the recycling bin 21.

[0027] In practice, the drain pipe 5 is used to remove excess condensate from the recycling tank 21 and can be used by an external collection device to recycle the condensate.

[0028] As one implementation method in this embodiment, please refer to Figure 1 As shown, the top of the recycling tank 21 has a liquid inlet 4.

[0029] In practice, by opening a liquid inlet 4 at the top of the recovery box 21, clean water can be filled into the recovery box 21 to recover the heat of the gas discharged from the furnace body 1, and to improve the liquefaction of the gas by the condenser tube 23. The liquid inlet 4 is equipped with a sealing cover, which can effectively prevent dust and impurities from entering the recovery box 21 when not in use, thus affecting the waste heat recovery effect.

[0030] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, an air inlet pipe 101 is fixedly installed on the top of the oven body 1, and a piston plate 33 slides against the inner wall of the air inlet pipe 101.

[0031] In practice, the air inlet pipe 101 can be used to pick up and put in materials to be dried.

[0032] As one implementation method in this embodiment, please refer to Figure 1 As shown, an air pump 6 is fixedly installed at the end of the air outlet pipe 24 away from the recovery box 21.

[0033] Working Principle: During the drying process in the electrically heated industrial oven, a large amount of high-temperature air containing moisture is generated. Under the suction of the air pump 6, dry outside air is drawn into the oven body 1 through the one-way valve 34. The high-temperature air containing a large amount of moisture generated during the drying process inside the oven body 1 enters the condenser tube 23 through the exhaust pipe. The clean water outside the condenser tube 23 cools this high-temperature air containing a large amount of moisture, absorbing the heat from the air. As the high-temperature air flows within the condenser tube 23, the heat is absorbed by the clean water outside the condenser tube 23, achieving waste heat recovery. Water can be replenished and replaced through the liquid inlet 4 at the top of the recycling tank 21. After absorbing heat, the temperature rises and can be used for bathing, etc. The water vapor and other condensable components in the high-temperature air form liquid after cooling, which is collected in the connecting pipe 25 and flows into the liquid outlet pipe 26. Finally, the air that still carries the temperature is connected to the gas collection device through the gas outlet pipe 24 for combustion assistance in the combustion chamber of other combustion drying equipment, further recovering heat. When the oven body 1 finishes running, the cylinder 32 can be activated to push the piston plate 33 to separate from the air inlet pipe 101 of the oven body 1 for picking up and putting away the material to be dried.

[0034] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A high-efficiency and energy-saving industrial oven waste heat recovery device, comprising an oven body (1), characterized in that: An air intake mechanism (3) for conveying air is provided above the oven body (1), and a heat recovery mechanism (2) for recovering waste heat is provided on one side of the oven body (1). The recycling mechanism (2) includes a recycling box (21) fixedly installed on one side of the oven body (1). The top of the recycling box (21) is provided with an air outlet (22). An air outlet pipe (24) is connected inside the air outlet (22). One end of the air outlet pipe (24) located inside the recycling box (21) is connected to a connecting pipe (25). The end of the connecting pipe (25) away from the air outlet (22) is connected to a condenser pipe (23). The end of the condenser pipe (23) away from the connecting pipe (25) is connected to an exhaust pipe on the oven body (1). The bottom of the connecting pipe (25) is connected to a liquid outlet pipe (26).

2. The high-efficiency and energy-saving industrial oven waste heat recovery device according to claim 1, characterized in that: The air intake mechanism (3) includes a support frame (31) fixedly connected to the top of the oven body (1). A cylinder (32) is fixedly connected to the top of the support frame (31). The output end of the cylinder (32) passes through the support frame (31) and is fixedly connected to a piston plate (33). A one-way valve (34) is fixedly installed on the piston plate (33).

3. The high-efficiency and energy-saving industrial oven waste heat recovery device according to claim 1, characterized in that: The recycling bin (21) is connected to a drain pipe (5).

4. The high-efficiency and energy-saving industrial oven waste heat recovery device according to claim 1, characterized in that: The top of the recycling bin (21) is provided with a liquid inlet (4).

5. The high-efficiency and energy-saving industrial oven waste heat recovery device according to claim 2, characterized in that: An air inlet pipe (101) is fixedly installed on the top of the oven body (1), and the piston plate (33) slides against the inner wall of the air inlet pipe (101).

6. The high-efficiency and energy-saving industrial oven waste heat recovery device according to claim 2, characterized in that: An air pump (6) is fixedly installed at the end of the air outlet pipe (24) away from the recovery box (21).

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