Flue gas waste heat recycling device for high-purity magnesia kiln

Abstract

The utility model discloses a high purity magnesite kiln flue gas waste heat recycling device which comprises a placing box, the right side of the placing box is fixedly connected with a waste heat box, the right side of an inner cavity of the waste heat box is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a worm, the surface of the worm is meshed with a worm wheel, and the worm wheel is fixedly connected with a second motor. And an inner cavity of the worm wheel is fixedly connected with a blowing fan, a smoke conveying pipe is arranged on the left side of an inner cavity of the waste heat box, and a heating box is arranged at the bottom of the waste heat box. Through cooperative use of the placing box, the waste heat box, the first motor, the worm, the worm gear, the blowing fan, the flue gas conveying pipe, the heating box, the heating pipe, an extension frame, a second motor, a driving gear, a driven gear, a rotating rod, a stirring rod, a water inlet pipe and a water drainage pipe, heat in high-temperature flue gas can be blown to raw materials in the placing box, and the raw materials are preheated before being processed; in addition, redundant heat and water can form cold and heat exchange, and smoke waste heat is reasonably utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recycling devices, in particular to a high-purity magnesia kiln flue gas waste heat recycling device. Background Art

[0002] High-purity magnesia refers to sintered magnesium oxide with a content of more than 99% and a bulk density greater than 3.4g / cm3. The molecular formula is MgO, the relative molecular mass is 40.30, it is odorless, tasteless, and non-toxic; the bulk density is about 3.4g / cm3; the color is white, slightly yellow or colorless; the melting point is 2800℃. High-purity magnesia is difficult to dissolve in water, insoluble in alcohol, soluble in acid or ammonium salt solution, and slowly absorbs carbon dioxide and water in the air to form basic magnesium carbonate. Because high-purity magnesia has good high-temperature flexural strength, slag resistance and corrosion resistance, it can increase the service life of the steelmaking furnace lining, so it is widely used in steelmaking furnaces. It is a high-quality material for manufacturing refractory bricks and amorphous refractory materials; it can also be used as a filler to make thermocouples and thermal insulation materials; it can also be used as ceramic raw materials and sintering aids, as well as metallurgy, building materials, chemicals, national defense, medical equipment, etc. High-purity magnesia needs to be fired in a high-purity magnesia kiln during production, and high-temperature flue gas will be generated during the firing process. The traditional way is to cool and dedust the high-temperature flue gas and then discharge it directly. This method not only requires more resources, but also the heat energy in the flue gas cannot be effectively utilized. Therefore, a high-purity magnesia kiln flue gas waste heat recycling device is proposed to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a high-purity magnesia kiln flue gas waste heat recycling device, which has the advantage of flue gas waste heat recovery and utilization.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a technical scheme adopted by a high-purity magnesia sand kiln flue gas waste heat recycling device is: it includes a placement box, a waste heat box is fixedly connected to the right side of the placement box, a first motor is fixedly connected to the right side of the inner cavity of the waste heat box, a worm is fixedly connected to the output end of the first motor, a worm is meshed with a worm wheel on the surface of the worm, a blowing fan is fixedly connected to the inner cavity of the worm wheel, a flue gas conveying pipe is arranged on the left side of the inner cavity of the waste heat box, a heating box is arranged at the bottom of the waste heat box, a heating pipe is arranged in the inner cavity of the heating box, an extension frame is fixedly connected to the front side of the heating box, a second motor is fixedly connected to the rear side of the extension frame, a driving gear is fixedly connected to the output end of the second motor, a driven gear is meshed with the surface of the driving gear, a rotating rod is fixedly connected to the inner cavity of the driven gear, a stirring rod is fixedly connected to the surface of the rotating rod, a water inlet pipe is connected to the top of the heating box, and a drain pipe is connected to the bottom of the right side of the heating box.

[0007] As a preferred solution, a connecting groove is provided on the right side of the placement box and the left side of the waste heat box, and a steel partition net is provided in the inner cavity of the connecting groove.

[0008] As a preferred solution, an air intake slot is opened on the right side of the waste heat box, and the smoke conveying pipe and the heating pipe are both U-shaped in design.

[0009] As a preferred solution, a support plate is fixedly connected to the rear side of the inner cavity of the waste heat box, and the blowing fan is movably connected to the support plate via a bearing.

[0010] As a preferred solution, the bottom of the smoke conveying pipe is connected to the heating pipe, and the surface of the drainage pipe is connected to a control valve.

[0011] As a preferred solution, the number of the heating tubes is three, and the stirring rod is arranged at intervals between the three heating tubes.

[0012] As a preferred solution, a liquid level sensor is arranged on the right side of the inner cavity of the heating box, a temperature sensor is arranged on the bottom of the inner cavity of the heating box, and a control box is fixedly connected to the front side of the heating box.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a high-purity magnesia kiln flue gas waste heat recycling device, which has the following beneficial effects.

[0015] 1. Through the coordinated use of the placement box, the waste heat box, the first motor, the worm, the worm gear, the blowing fan, the flue gas conveying pipe, the heating box, the heating pipe, the extension frame, the second motor, the driving gear, the driven gear, the rotating rod, the stirring rod, the water inlet pipe and the drain pipe, the heat in the high-temperature flue gas can be blown to the raw materials in the placement box to preheat the raw materials before processing, and the excess heat can be exchanged with water to reasonably utilize the waste heat of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the waste heat box and the heating box of the utility model;

[0018] Figure 3 It is a top cross-sectional schematic diagram of the heating box of the utility model.

[0019] In the figure: 1. placement box; 2. waste heat box; 3. first motor; 4. worm; 5. worm gear; 6. blowing fan; 7. flue gas conveying pipe; 8. heating box; 9. heating pipe; 10. extension frame; 11. second motor; 12. driving gear; 13. driven gear; 14. rotating rod; 15. stirring rod; 16. water inlet pipe; 17. drainage pipe; 18. steel partition; 19. support plate; 20. liquid level sensor; 21. temperature sensor; 22. control box. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-3 The utility model discloses a device for recycling waste heat of flue gas from a high-purity magnesia sand kiln, comprising a placement box 1, a waste heat box 2 is fixedly connected to the right side of the placement box 1, a first motor 3 is fixedly connected to the right side of the inner cavity of the waste heat box 2, a worm 4 is fixedly connected to the output end of the first motor 3, a worm gear 5 is meshed on the surface of the worm gear 4, a blowing fan 6 is fixedly connected to the inner cavity of the worm gear 5, a flue gas conveying pipe 7 is arranged on the left side of the inner cavity of the waste heat box 2, a heating box 8 is arranged at the bottom of the waste heat box 2, a heating pipe 9 is arranged in the inner cavity of the heating box 8, an extension frame 10 is fixedly connected to the front side of the heating box 8, a second motor 11 is fixedly connected to the rear side of the extension frame 10, a driving gear 12 is fixedly connected to the output end of the second motor 11, a driven gear 13 is meshed on the surface of the driving gear 12, a rotating rod 14 is fixedly connected to the inner cavity of the driven gear 13, a stirring rod 15 is fixedly connected to the surface of the rotating rod 14, a water inlet pipe 16 is connected to the top of the heating box 8, and a drain pipe 17 is connected to the bottom of the right side of the heating box 8.

[0024] A connecting groove is provided on the right side of the placement box 1 and the left side of the waste heat box 2, and a steel partition 18 is provided in the inner cavity of the connecting groove;

[0025] By providing the steel partition 18 , it is possible to prevent the raw materials from falling into the waste heat box 2 .

[0026] An air intake slot is provided on the right side of the waste heat box 2, and the smoke delivery pipe 7 and the heating pipe 9 are both U-shaped;

[0027] A support plate 19 is fixedly connected to the rear side of the inner cavity of the waste heat box 2, and the blowing fan 6 is movably connected to the support plate 19 through a bearing;

[0028] By providing the support plate 19, the blowing fan 6 can be supported, and the blowing fan 6 can be smoothly rotated.

[0029] The bottom of the smoke delivery pipe 7 is connected to the heating pipe 9, and the surface of the drain pipe 17 is connected to a control valve;

[0030] There are three heating tubes 9, and the stirring rods 15 are arranged at intervals between the three heating tubes 9;

[0031] A liquid level sensor 20 is provided on the right side of the inner cavity of the heating box 8, a temperature sensor 21 is provided on the bottom of the inner cavity of the heating box 8, and a control box 22 is fixedly connected to the front side of the heating box 8;

[0032] By providing a liquid level sensor 20 and a temperature sensor 21, the liquid level and the temperature of the water in the heating box 8 can be detected, and by providing a control box 22, the operation of the control elements can be facilitated.

[0033] The working principle of the utility model is as follows: an external fan conveys the high-temperature flue gas generated by the high-purity magnesia kiln to the flue gas conveying pipe 7, a first motor 3 drives the blowing fan 6 to rotate through the worm 4 and the worm gear 5, the blowing fan 6 blows the hot air around the flue gas conveying pipe 7 to the placement box 1 through the connecting groove, and preheats the raw materials in the placement box 1, the flue gas after the first cooling is continuously conveyed to the heating tube 9, the heating tube 9 forms a cold and heat exchange with the water in the heating box 8, and heats the water, during the heating process, the second motor 11 drives the driven gear 13 to rotate through the driving gear 12, the driven gear 13 drives the rotating rod 14 to rotate, the rotating rod 14 drives the stirring rod 15 to rotate, the stirring rod 15 drives the water to flow quickly, so that the water is evenly heated, the flue gas after the second cooling is conveyed to the external flue gas treatment equipment for flue gas treatment, and the heated water can be discharged to the outside for other purposes.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A device for recycling waste heat from flue gas of a high-purity magnesia kiln, comprising a storage box (1), characterized in that: The right side of the placement box (1) is fixedly connected to a waste heat box (2), the right side of the inner cavity of the waste heat box (2) is fixedly connected to a first motor (3), the output end of the first motor (3) is fixedly connected to a worm (4), the surface of the worm (4) is meshed with a worm wheel (5), the inner cavity of the worm wheel (5) is fixedly connected to a blowing fan (6), a smoke conveying pipe (7) is arranged on the left side of the inner cavity of the waste heat box (2), a heating box (8) is arranged at the bottom of the waste heat box (2), the inner cavity of the heating box (8) is provided with a heating pipe (9), and the heating box (8) The front side of the heating box (8) is fixedly connected to an extension frame (10), the rear side of the extension frame (10) is fixedly connected to a second motor (11), the output end of the second motor (11) is fixedly connected to a driving gear (12), the surface of the driving gear (12) is meshed with a driven gear (13), the inner cavity of the driven gear (13) is fixedly connected to a rotating rod (14), the surface of the rotating rod (14) is fixedly connected to a stirring rod (15), the top of the heating box (8) is connected to a water inlet pipe (16), and the bottom of the right side of the heating box (8) is connected to a drain pipe (17).

2. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: A communicating groove is provided on the right side of the placement box (1) and the left side of the waste heat box (2), and a steel partition net (18) is provided in the inner cavity of the communicating groove.

3. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: An air intake slot is provided on the right side of the waste heat box (2), and the smoke conveying pipe (7) and the heating pipe (9) are both of U-shaped design.

4. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: A support plate (19) is fixedly connected to the rear side of the inner cavity of the waste heat box (2), and the blowing fan (6) is movably connected to the support plate (19) via a bearing.

5. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: The bottom of the smoke conveying pipe (7) is in communication with the heating pipe (9), and the surface of the drainage pipe (17) is in communication with a control valve.

6. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: The number of the heating tubes (9) is three, and the stirring rod (15) is arranged at intervals between the three heating tubes (9).

7. A high-purity magnesia kiln flue gas waste heat recycling device according to claim 1, characterized in that: A liquid level sensor (20) is arranged on the right side of the inner cavity of the heating box (8), a temperature sensor (21) is arranged at the bottom of the inner cavity of the heating box (8), and a control box (22) is fixedly connected to the front side of the heating box (8).

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