Controllable atmosphere multi-purpose furnace waste heat utilization device

Abstract

The utility model discloses a controllable atmosphere multi -purpose furnace waste heat utilization device, including waste heat recovery tank, water collecting tank sets up in the bottom of waste heat recovery tank, support is a group, is fixed in water collecting tank upper end both sides, heat exchange coil is fixed and is inserted in between a group of support, and both ends respectively stretches out waste heat recovery tank, water inlet pipeline is inserted in the top of waste heat recovery tank, sprays pipeline and installs in water inlet pipeline bottom, water pan is staggered and is installed between heat exchange coil, and the water drop hole is even and is opened in water pan bottom, circulating pump installs in waste heat recovery tank bottom one side, and water inlet end is linked with water collecting tank, and the circulating pipeline is inserted in circulating pump water outlet, and top is linked with sprays pipeline, the utility model has the beneficial effects that, cooling water is even sprayed on heat exchange coil through upper sprays pipeline, and carries out heat exchange with heat exchange coil, and cooperates with a plurality of water pan and sprays down in turn, to increase heat transfer area, improve heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of controlled atmosphere multi-purpose furnace technology, specifically a waste heat utilization device for a controlled atmosphere multi-purpose furnace. Background Technology

[0002] A controlled atmosphere multi-purpose furnace is an industrial device that achieves metal heat treatment by precisely controlling the atmosphere and temperature inside the furnace. Through precise dual control of atmosphere (such as nitrogen-methanol atmosphere) and temperature, controlled atmosphere multi-purpose furnaces are widely used in processes such as metal quenching and carburizing.

[0003] The large amount of heat generated during the operation of a controlled atmosphere multi-purpose furnace is discharged into the flue, resulting in energy waste. An existing patent application (CN202420433089.X) discloses a waste heat recovery device for a controlled atmosphere multi-purpose furnace, which uses a filter drawer to filter exhaust gas and, in conjunction with a oscillating plate, makes the water more active, accelerating heat exchange. However, this direct contact between flue gas and water for heat exchange means that impurities in the flue gas that are not filtered by the drawer can easily pollute the water, affecting subsequent use, and also results in low heat exchange efficiency. Utility Model Content

[0004] To address the above deficiencies, this utility model provides a waste heat recovery device for a controllable atmosphere multi-purpose furnace, thereby solving the problem of waste heat recovery from flue gas in a controllable atmosphere multi-purpose furnace.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A controllable atmosphere multi-purpose furnace waste heat utilization device, including Waste heat recovery box; A water collection tank is located at the bottom of the waste heat recovery box; The support pillars, as a set, are fixed to both sides of the upper end of the water collection tank; The heat exchange coil is fixedly inserted between a set of support columns, with both ends extending out of the waste heat recovery box; The water inlet pipe is inserted into the top of the waste heat recovery box; The sprinkler pipe is installed at the bottom of the water inlet pipe; Several water collection trays are installed alternately between the heat exchange coils; There are several drip holes, evenly spaced at the bottom of the water collection tray; The circulating pump is installed on one side of the bottom of the waste heat recovery tank, and its inlet end is connected to the water collection tank; The circulation pipe is inserted into the outlet of the circulation pump, and its top is connected to the spray pipe.

[0006] Furthermore, the heat exchange coil is equipped with a cleaning mechanism, which includes electric actuators fixed to the front and rear ends of the waste heat recovery box. The telescopic ends of the electric actuators are connected to connecting rods, and the bottom of the connecting rods is movably inserted into the waste heat recovery box via round rods. A set of relative guide rods is installed between a set of support columns, and sliding bushings are movably fitted on each set of relative guide rods. The sliding bushings are connected to the corresponding round rods, and a scraper is connected to the upper end of the sliding bushing. When there is a lot of scale on the heat exchange coil, which affects the heat exchange efficiency, a set of electric actuators work synchronously, driving the sliding bushings to slide on the guide rods through the connecting rods and round rods. A set of scrapers is equipped with cleaning brushes, which can automatically clean the scale on the heat exchange coil.

[0007] Furthermore, the waste heat recovery box has strip-shaped holes at the front and rear ends corresponding to the round rod, which facilitates the left and right movement of the round rod.

[0008] Furthermore, the heat exchange coil is a flat tube, which facilitates the scraper to clean the scale on the heat exchange coil.

[0009] Furthermore, the heat exchange coil has an air inlet at the bottom and an exhaust outlet at the top. The air inlet is connected to the flue gas duct of the controllable atmosphere multi-purpose furnace, and the exhaust outlet is connected to an external flue gas filter.

[0010] Furthermore, an electromagnetic control valve is installed on the water inlet pipe, and a one-way valve is installed at the left end of the spray pipe. The electromagnetic control valve is used to control the opening and closing of the water inlet pipe, and the one-way valve prevents water in the spray pipe from flowing back into the circulation pipe.

[0011] Furthermore, the bottom of the water collection tank has a drain outlet, through which the heated hot water in the water collection tank can be discharged.

[0012] This utility model provides a waste heat utilization device for a controllable atmosphere multi-purpose furnace, which has the following beneficial effects: the flue gas generated during the operation of the controllable atmosphere multi-purpose furnace flows into the heat exchange coil, and the cooling water is atomized into fine droplets through the upper spray pipe and sprayed evenly on the heat exchange coil to exchange heat with the heat exchange coil. With the help of several water collection pans spraying downwards in sequence, the heat transfer area is increased and the heat exchange efficiency is improved. At the same time, the flue gas temperature is reduced to prevent water pollution. The circulating pump realizes the circulating heat exchange of the cooling water. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a controllable atmosphere multi-purpose furnace waste heat utilization device according to the present invention; Figure 2 This is a cross-sectional view of the spray pipe described in this utility model; Figure 3 This is a top view of the water collection tray described in this utility model; Figure 4This is an external view of the waste heat recovery box described in this utility model; Figure 5 This is a schematic diagram of the scraper described in this utility model; Figure 6 This is a cross-sectional view of the heat exchange coil described in this utility model; In the diagram: 1. Waste heat recovery box; 2. Water collection tank; 3. Support column; 4. Heat exchange coil; 5. Water inlet pipe; 6. Spray pipe; 7. Water collection pan; 8. Drip hole; 9. Circulation pump; 10. Circulation pipe; 11. Electric actuator; 12. Connecting rod; 13. Round rod; 14. Guide rod; 15. Sliding bushing; 16. Scraper; 17. Strip hole; 18. Air inlet; 19. Exhaust outlet; 20. Electromagnetic control valve; 21. Check valve; 22. Drain outlet. Detailed Implementation

[0014] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0015] Please see Figures 1 to 6 As shown in the figure, this application provides a controllable atmosphere multi-purpose furnace waste heat utilization device, including a waste heat recovery box 1; a water collection tank 2, which is set at the bottom of the waste heat recovery box 1; a set of support columns 3, which are fixed on both sides of the upper end of the water collection tank 2; heat exchange coils 4, which are fixedly inserted between the set of support columns 3, and whose two ends extend out of the waste heat recovery box 1 respectively; a water inlet pipe 5, which is inserted at the top of the waste heat recovery box 1; a spray pipe 6, which is installed at the bottom of the water inlet pipe 5; several water collection trays 7, which are staggered between the heat exchange coils 4; several drip holes 8, which are evenly distributed at the bottom of the water collection trays 7; a circulation pump 9, which is installed on one side of the bottom of the waste heat recovery box 1, and whose water inlet end is connected to the water collection tank 2; and a circulation pipe 10, which is inserted at the water outlet end of the circulation pump 9, and whose top end is connected to the spray pipe 6.

[0016] In this embodiment, the flue gas generated during the operation of the controlled atmosphere multi-purpose furnace flows into the heat exchange coil 4. Cooling water flows into the spray pipe 6 through the upper water inlet pipe 5, atomizes into fine droplets, and is evenly sprayed onto the heat exchange coil 4 for heat exchange. Several water collection trays 7 are staggered and installed between the heat exchange coils 4. Figure 1As shown, the cooling water after the initial heat exchange flows onto the water collection pan 7 and is sprayed downwards through the drip holes 8 on the water collection pan 7, thereby achieving multiple heat exchange processes. The spray heat exchange increases the heat transfer area and improves the heat exchange efficiency. At the same time, it reduces the flue gas temperature. The water after heat exchange flows into the water collection tank 2. The circulation pump 9 can pump the water in the water collection tank 2 back into the spray pipe 6 through the circulation pipe 10 to achieve circulating heat exchange and increase the temperature of the water after heat exchange.

[0017] In some embodiments, the heat exchange coil 4 is provided with a cleaning mechanism, which includes an electric actuator 11 fixed to the front end and rear end of the waste heat recovery box 1 respectively. The telescopic end of the electric actuator 11 is connected to a connecting rod 12. The bottom of the connecting rod 12 is movably inserted into the waste heat recovery box 1 through a round rod 13. A set of relative guide rods 14 are installed between a set of support columns 3. A sliding bushing 15 is movably fitted on a set of relative guide rods 14 respectively. The sliding bushing 15 is connected to the corresponding round rod 13, and a scraper 16 is connected to the upper end of the sliding bushing 15.

[0018] and in conjunction with the appendix Figure 4 —Appendix Figure 6 As shown, the electric actuator 11 uses an electric push rod. When there is a lot of scale on the heat exchange coil 4, which affects the heat exchange efficiency, a group of electric actuators 11 work synchronously. Through the connecting rod 12 and the round rod 13, the sliding bushing 15 is driven to slide on the guide rod 14. The scraper 16 is equipped with a cleaning brush, which can automatically clean the scale on the heat exchange coil 4.

[0019] In some embodiments, the front and rear ends of the waste heat recovery box 1 are respectively provided with strip holes 17 corresponding to the round rod 13, so as to facilitate the left and right movement of the round rod 13.

[0020] In some embodiments, the heat exchange coil 4 is a flat tube, which facilitates the scraper 16 in cleaning the scale on the heat exchange coil 4.

[0021] In some embodiments, the heat exchange coil 4 has an air inlet 18 at the bottom and an exhaust port 19 at the top. The air inlet 18 is connected to the flue gas duct of the controllable atmosphere multi-purpose furnace, and the exhaust port 19 is connected to an external flue gas filter.

[0022] In some embodiments, an electromagnetic control valve 20 is installed on the water inlet pipe 5, and a one-way valve 21 is installed at the left end of the spray pipe 6. The electromagnetic control valve 20 is used to control the opening and closing of the water inlet pipe 5, and the one-way valve 21 prevents the water in the spray pipe 6 from flowing back into the circulation pipe 10.

[0023] In some embodiments, a drain outlet 22 is provided at the bottom of the water collection tank 2, through which the heated hot water in the water collection tank 2 can be discharged.

[0024] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A controllable atmosphere multi-purpose furnace waste heat utilization device, characterized in that: include Waste heat recovery box (1); A water collection tank (2) is installed at the bottom of the waste heat recovery box (1); The support pillars (3) are a set and are fixed on both sides of the upper end of the water collection tank (2); The heat exchange coil (4) is fixedly inserted between a set of support columns (3), and both ends extend out of the waste heat recovery box (1). The water inlet pipe (5) is inserted into the top of the waste heat recovery box (1); Sprinkler pipe (6) is installed at the bottom of water inlet pipe (5); There are several water collection trays (7), which are staggered between the heat exchange coils (4); There are several drip holes (8), which are evenly distributed at the bottom of the water collection tray (7); The circulating pump (9) is installed on one side of the bottom of the waste heat recovery box (1), and its inlet end is connected to the water collection tank (2); The circulation pipe (10) is inserted into the outlet of the circulation pump (9) and its top is connected to the spray pipe (6).

2. The controllable atmosphere multi-purpose furnace waste heat utilization device according to claim 1, characterized in that, The heat exchange coil (4) is provided with a cleaning mechanism, which includes an electric actuator (11) fixed at the front end and the rear end of the waste heat recovery box (1). The telescopic end of the electric actuator (11) is connected to a connecting rod (12). The bottom of the connecting rod (12) is movably inserted into the waste heat recovery box (1) through a round rod (13). A set of relative guide rods (14) is installed between a set of support columns (3). A sliding bushing (15) is movably fitted on a set of relative guide rods (14). The sliding bushing (15) is connected to the corresponding round rod (13), and a scraper (16) is connected to the upper end of the sliding bushing (15).

3. The controllable atmosphere multi-purpose furnace waste heat utilization device according to claim 2, characterized in that, The waste heat recovery box (1) has strip holes (17) at the front and rear ends corresponding to the round rod (13).

4. The controlled atmosphere multi-purpose furnace waste heat utilization device according to claim 2, characterized in that, The heat exchange coil (4) is a flat tube.

5. The controllable atmosphere multi-purpose furnace waste heat utilization device according to claim 1, characterized in that, The heat exchange coil (4) has an air inlet (18) at the bottom and an exhaust outlet (19) at the top.

6. The controlled atmosphere multi-purpose furnace waste heat utilization device according to claim 1, characterized in that, An electromagnetic control valve (20) is installed on the water inlet pipe (5), and a one-way valve (21) is installed on the left end of the spray pipe (6).

7. The controlled atmosphere multi-purpose furnace waste heat utilization device according to claim 1, characterized in that, The bottom of the water collection tank (2) has a drain outlet (22).

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