An integrated device for waste gas treatment and waste heat recovery in fused magnesia production.

Abstract

This invention discloses an integrated device for treating waste gas and recovering waste heat from fused magnesia production. The device includes a heat exchange box, the inner cavity of which is fixedly connected to multiple heat exchange plates via connecting blocks. Each pair of adjacent heat exchange plates is connected by a connecting pipe. The top left end of the uppermost heat exchange plate is connected to a combustion chamber via a pipe, and a burner is fixedly connected to the middle of the bottom of the combustion chamber. In this invention, waste gas enters the combustion chamber through an inlet pipe. Turning on the burner accelerates the decomposition of substances in the waste gas. The waste gas then enters the uppermost heat exchange plate through pipes and, with the assistance of connecting pipes, enters the other heat exchange plates. Finally, it is discharged from the lowermost heat exchange plate into a neutralization box through a pipe. During this process, the water in the heat exchange box rapidly cools the waste gas, thereby achieving the purpose of recovering and utilizing the waste heat.

Description

Technical Field

[0001] This invention relates to the field of industrial waste gas treatment and energy conservation and environmental protection technology, specifically to an integrated device for waste gas treatment and waste heat recovery in the production of fused magnesia. Background Technology

[0002] Fused magnesia is an important high-performance refractory raw material. Its production mainly involves smelting magnesite in an electric arc furnace. During the smelting process, a large amount of high-temperature (usually as high as 600-1200℃), high dust concentration industrial waste gas is generated, containing MgO powder, fluorides (impurities from the ore), sulfides, and a small amount of CO. If these waste gases are directly emitted, they will cause serious air pollution and huge waste of heat energy. The existing waste gas treatment methods and their effects are not ideal and cannot meet the increasingly stringent environmental protection requirements. Moreover, most existing technologies lack effective recovery and utilization measures for the waste heat generated in the waste gas treatment, resulting in a huge waste of energy and increased production costs. To address this, we propose an integrated device for waste gas treatment and waste heat recovery in fused magnesia production. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated device for treating waste gas and recovering waste heat from fused magnesia production, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated device for treating waste gas and recovering waste heat from fused magnesia production, comprising a heat exchange box, wherein the inner cavity of the heat exchange box is fixedly connected to heat exchange plates via connecting blocks, and there are multiple heat exchange plates, with each pair of adjacent heat exchange plates connected by a connecting pipe. The top left end of the heat exchange plate at the top is connected to a combustion box via a pipe, and a burner is fixedly connected to the middle of the bottom of the combustion box. The bottom right end of the heat exchange plate at the bottom is connected to a neutralization box via a pipe, and a filter box is connected to the right side of the neutralization box via a pipe.

[0005] Preferably, the bottom right side of the filter box is connected to an air outlet pipe, and the right side of the front of the filter box is movably connected to a movable door via a hinge. A handle is fixedly connected to the front of the movable door, and a retaining seat is fixedly connected to the inner cavity of the filter box. The inner cavity of the retaining seat is sequentially fitted with a glass fiber coalescing filter element and an activated silicon filter layer from top to bottom.

[0006] Preferably, a partition is fixedly connected to the middle of the inner cavity of the neutralization box, and a through hole is opened at the upper end of the inner surface of the partition. Observation windows are provided on the left and right sides of the front of the neutralization box, liquid outlets are opened on the left and right sides of the back of the neutralization box, and liquid injection ports are opened on the left and right sides of the top of the neutralization box. The ends of the liquid injection ports and liquid outlets are threaded with sealing caps.

[0007] Preferably, the heat exchange box has a water inlet at the top and a water outlet at the bottom of the back of the heat exchange box. Both the water outlet and the water inlet are threaded with sealing caps. Support legs are fixedly connected to the bottom of the combustion box, the heat exchange box, the neutralization box and the filter box.

[0008] Preferably, an air intake pipe is connected to the upper left side of the combustion chamber, and a first housing is fixedly connected to the lower left side of the combustion chamber and the air intake pipe. The top of the first housing is connected to the bottom of the air intake pipe through an inclined pipe. A second housing and a third housing are fixedly connected to the left and right ends of the bottom of the combustion chamber cavity, respectively. Fan blades are movably connected to the inner surfaces of the first housing, the second housing, and the third housing. The fan blades on the inner surfaces of the second housing and the third housing are connected by a single-sided toothed synchronous belt drive. The fan blades on the inner surfaces of the second housing and the first housing are connected by a single-sided toothed synchronous belt drive. A first auxiliary rod is movably connected to the outer surface of the fan blades on the inner surface of the first housing, and the first auxiliary rod is fixedly connected to the back of the combustion chamber.

[0009] Preferably, hollow plates are fixedly connected to the left and right ends of the top of the neutralization box cavity. Multiple equidistant atomizing nozzles are connected to the bottom of the hollow plates. The tops of the second and third shells are connected to the hollow plates at the left and right ends respectively through pipes. A motor is fixedly connected to the lower end of the back of the neutralization box. The output shaft of the motor is connected to the fan blades on the inner surface of the third shell through a single-sided toothed synchronous belt. The output shaft of the motor is movably connected to a second auxiliary rod, and the second auxiliary rod is fixedly connected to the back of the neutralization box.

[0010] Preferably, a battery box is fixedly connected to the left end of the back of the neutralization box, a storage battery is fixedly connected to the bottom of the inner cavity of the battery box, a charging port is provided on the back of the battery box, a sleeve is fixedly connected to the right end of the back of the neutralization box, a stator is fixedly connected to the inner side of the sleeve, a rotor is movably connected to the middle end of the inner surface of the sleeve, and the rear end of the rotor is connected to the output shaft of the motor through a single-sided toothed synchronous belt.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, waste gas enters the combustion chamber through the inlet pipe. Turning on the burner accelerates the decomposition of substances in the waste gas. The waste gas then enters the uppermost heat exchange plate through a pipe, and with the help of a connecting pipe, enters other heat exchange plates. Finally, it is discharged from the lowermost heat exchange plate through a pipe into the neutralization tank. During this process, the water in the heat exchange tank rapidly cools the waste gas, thereby achieving the purpose of recovering and utilizing the waste heat. The deacidifying agent and dealkali-removing agent are pre-added to the neutralization tank through the left and right injection ports, respectively. Then, the motor is turned on, and the fan blades in the third housing are driven to rotate through the single-sided toothed synchronous belt. With the cooperation of the single-sided toothed synchronous belt, the fan blades in the second housing are driven to rotate synchronously. Thus, the deacidifying agent and dealkali-removing agent are respectively transported through the pipeline to the corresponding hollow plate and finally discharged from the atomizing nozzle. This achieves the purpose of deacidifying and dealkali-removing the exhaust gas. Finally, the gas enters the filter box through the pipeline and is physically filtered by two layers of glass fiber coalescing filter element and activated silicon filter layer. The clean air is discharged from the exhaust pipe.

[0012] 2. When the fan blades in the second housing rotate, the fan blades in the first housing will rotate via a single-sided toothed synchronous belt, thereby transporting outside air to the intake pipe through the inclined tube, which can improve the combustion efficiency of the burner. When the motor rotates, it will also drive the rotor to rotate via the single-sided toothed synchronous belt, and with the cooperation of the stator, it can generate electrical energy and store it in the battery, thereby achieving the purpose of self-generation. This facilitates the subsequent use of the electricity stored in the battery, effectively reduces the consumption of mains power, and meets the national energy conservation and emission reduction requirements. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention from a first-view perspective. Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from a second perspective. Figure 3 Cross-section of the present invention Figure 1 ; Figure 4 Cross-section of the present invention Figure 2 ; Figure 5 This is a schematic diagram of the rotor structure of the present invention; Figure 6 This is a schematic diagram of the fan blade structure of the present invention.

[0014] In the diagram: 1. Combustion box; 2. Water inlet; 3. Observation window; 4. Handle; 5. Movable door; 6. Air outlet pipe; 7. Filter box; 8. Neutralization box; 9. Liquid inlet; 10. Heat exchange box; 11. Support leg; 12. Liquid outlet; 13. Motor; 14. Battery box; 15. First housing; 16. Air inlet pipe; 17. First auxiliary rod; 18. Water outlet; 19. Charging socket; 20. Second auxiliary rod; 21. Sleeve; 22. Heat exchange plate; 23. Connecting pipe; 24. Through hole; 25. Atomizing nozzle; 26. Glass fiber coalescing filter element; 27. Activated silicon filter layer; 28. Burner; 29. ​​Second housing; 30. Third housing; 31. Card holder; 32. Partition plate; 33. Hollow plate; 34. Connecting block; 35. Rotor; 36. Stator; 37. Battery; 38. Fan blade. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-6 The following technical solution is provided, specifically disclosed: including a heat exchange box 10, the inner cavity of the heat exchange box 10 is fixedly connected to a heat exchange plate 22 via a connecting block 34, there are multiple heat exchange plates 22, and every two adjacent heat exchange plates 22 are connected by a connecting pipe 23, the top left end of the heat exchange plate 22 is connected to a combustion box 1 via a pipe, and a burner 28 is fixedly connected to the middle end of the bottom of the inner cavity of the combustion box 1, the bottom right end of the heat exchange plate 22 is connected to a neutralization box 8 via a pipe, and a filter box 7 is connected to the right side of the neutralization box 8 via a pipe.

[0017] Exhaust gas enters the combustion chamber 1 through the inlet pipe 16. Turning on the burner 28 accelerates the decomposition of substances in the exhaust gas. The exhaust gas then enters the uppermost heat exchange plate 22 through a pipe, and with the assistance of the connecting pipe 23, enters other heat exchange plates 22. Finally, it is discharged from the lowermost heat exchange plate 22 through a pipe into the neutralization chamber 8. During this process, the water in the heat exchange chamber 10 rapidly cools the exhaust gas, thus achieving the purpose of recovering and utilizing the waste heat. The deacidifying agent and dealkali-removing agent are pre-added to the neutralization chamber 8 through the left and right injection ports 9, respectively. When the motor 13 is turned on, the fan blades 38 in the third housing 30 can be rotated by the single-sided toothed synchronous belt. With the cooperation of the single-sided toothed synchronous belt, the fan blades 38 in the second housing 29 can be rotated synchronously. Thus, the deacidifying agent and the dealkali-removing agent can be transported to the corresponding hollow plates 33 through the pipeline and finally discharged from the atomizing nozzle 25. This achieves the purpose of deacidifying and dealkali-removing the exhaust gas. Finally, the gas enters the filter box 7 through the pipeline and is physically filtered by the glass fiber coalescing filter element 26 and the activated silicon filter layer 27. The clean air is discharged from the exhaust pipe 6.

[0018] The bottom right side of the filter box 7 is connected to an air outlet pipe 6. The right side of the front of the filter box 7 is connected to a movable door 5 via a hinge. The front of the movable door 5 is fixedly connected to a handle 4. The inner cavity of the filter box 7 is fixedly connected to a card holder 31, and the inner cavity of the card holder 31 is sequentially fitted with a glass fiber coalescing filter element 26 and an activated silicon filter layer 27 from top to bottom.

[0019] A partition 32 is fixedly connected to the middle of the inner cavity of the neutralization box 8. A through hole 24 is opened at the upper end of the inner surface of the partition 32. Observation windows 3 are provided on the left and right sides of the front of the neutralization box 8. Liquid outlets 12 are opened on the left and right sides of the back of the neutralization box 8. Liquid injection ports 9 are opened on the left and right sides of the top of the neutralization box 8. The ends of the liquid injection ports 9 and the liquid outlets 12 are threaded with sealing caps.

[0020] The top of the heat exchange box 10 is provided with a water inlet 2, and the bottom of the back of the heat exchange box 10 is provided with a water outlet 18. The ends of the water outlet 18 and the water inlet 2 are both threaded with sealing caps, and the bottom of the combustion box 1, the heat exchange box 10, the neutralization box 8 and the filter box 7 are all fixedly connected with support legs 11.

[0021] An air intake pipe 16 is connected to the upper left side of the combustion chamber 1. A first housing 15 is fixedly connected to the lower end of the air intake pipe 16 on the left side of the combustion chamber 1. The top of the first housing 15 is connected to the bottom of the air intake pipe 16 through an inclined pipe. A second housing 29 and a third housing 30 are fixedly connected to the left and right ends of the bottom of the neutralization chamber 8, respectively. Fan blades 38 are movably connected to the inner surfaces of the first housing 15, the second housing 29, and the third housing 30. The fan blades 38 on the inner surfaces of the second housing 29 and the third housing 30 are connected by a single-sided toothed synchronous belt drive. The fan blades 38 on the inner surfaces of the second housing 29 and the first housing 15 are also connected by a single-sided toothed synchronous belt drive. A first auxiliary rod 17 is movably connected to the outer surface of the fan blades 38 on the inner surface of the first housing 15, and the first auxiliary rod 17 is fixedly connected to the back of the combustion chamber 1.

[0022] Hollow plates 33 are fixedly connected to the top left and right ends of the inner cavity of the neutralization box 8. Multiple atomizing nozzles 25 are connected to the bottom of the hollow plates 33. The tops of the second housing 29 and the third housing 30 are connected to the hollow plates 33 on the left and right ends respectively through pipes. A motor 13 is fixedly connected to the lower end of the back of the neutralization box 8. The output shaft of the motor 13 is connected to the fan blades 38 on the inner surface of the third housing 30 through a single-sided toothed synchronous belt. The output shaft of the motor 13 is movably connected to the second auxiliary rod 20, and the second auxiliary rod 20 is fixedly connected to the back of the neutralization box 8.

[0023] When the fan blade 38 inside the second housing 29 rotates, it will drive the fan blade 38 inside the first housing 15 to rotate through the single-sided toothed synchronous belt, thereby delivering outside air to the intake pipe 16 through the inclined pipe, which can improve the combustion efficiency of the burner 28.

[0024] A battery box 14 is fixedly connected to the left end of the back of the neutralizing box 8. A storage battery 37 is fixedly connected to the bottom of the inner cavity of the battery box 14. A charging socket 19 is provided on the back of the battery box 14. A sleeve 21 is fixedly connected to the right end of the back of the neutralizing box 8. A stator 36 is fixedly connected to the inner side of the sleeve 21. A rotor 35 is movably connected to the middle end of the inner surface of the sleeve 21. The rear end of the rotor 35 is connected to the output shaft of the motor 13 through a single-sided toothed synchronous belt.

[0025] When the motor 13 rotates, it will also drive the rotor 35 to rotate through the single-sided toothed synchronous belt, and with the cooperation of the stator 36, it can generate electrical energy and store the electrical energy in the battery 37, thereby achieving the purpose of self-generation. This facilitates people's subsequent use of the electricity stored in the battery 37, effectively reducing the consumption of mains power and meeting the national energy conservation and emission reduction requirements.

[0026] The working principle of this application is as follows: Waste gas enters the combustion chamber 1 through the inlet pipe 16. The burner 28 is turned on, accelerating the decomposition of substances in the waste gas. Then, the waste gas enters the uppermost heat exchange plate 22 through a pipe, and with the cooperation of the connecting pipe 23, enters other heat exchange plates 22. Finally, it is discharged from the lowermost heat exchange plate 22 through a pipe into the neutralization chamber 8. During this process, the water in the heat exchange chamber 10 rapidly cools the waste gas, thereby achieving the purpose of recovering and utilizing the waste heat. The deacidifying agent and dealkali-removing agent are pre-added to the neutralization chamber 8 through the left and right injection ports 9, respectively. Then, the motor 13 is turned on, which drives the fan blades 38 in the third housing 30 to rotate via a single-sided toothed synchronous belt. With the cooperation of the single-sided toothed synchronous belt, the fan blades 38 in the second housing 29 can also rotate synchronously, thus allowing the deacidifying agent and dealkali-removing agent to be transported to the corresponding hollow plates 3 through pipes. The gas is discharged from the atomizing nozzle 25, thus achieving the purpose of deacidification and dealkali removal of the exhaust gas. Finally, the gas enters the filter box 7 through the pipeline and is physically filtered by two layers of glass fiber coalescing filter element 26 and activated silicon filter layer 27. The clean air is discharged from the exhaust pipe 6. When the fan blade 38 in the second housing 29 rotates, it drives the fan blade 38 in the first housing 15 to rotate through the single-sided toothed synchronous belt, thus transporting the outside air to the intake pipe 16 through the inclined pipe, which can improve the combustion efficiency of the burner 28. When the motor 13 rotates, it also drives the rotor 35 to rotate through the single-sided toothed synchronous belt, and with the cooperation of the stator 36, it can generate electrical energy and store the electrical energy in the battery 37, thus achieving the purpose of self-generation. This facilitates the subsequent use of the electricity stored in the battery 37, effectively reducing the consumption of mains power and meeting the national energy conservation and emission reduction requirements.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated device for treating waste gas and recovering waste heat from fused magnesia production, comprising a heat exchange box (10), characterized in that: The inner cavity of the heat exchange box (10) is fixedly connected to a heat exchange plate (22) via a connecting block (34). There are multiple heat exchange plates (22). Each pair of adjacent heat exchange plates (22) are connected by a connecting pipe (23). The top left end of the heat exchange plate (22) is connected to a combustion box (1) via a pipe. The middle end of the bottom of the combustion box (1) is fixedly connected to a burner (28). The bottom right end of the heat exchange plate (22) is connected to a neutralization box (8) via a pipe. The right side of the neutralization box (8) is connected to a filter box (7) via a pipe.

2. The integrated device for treating waste gas and recovering waste heat from fused magnesia production according to claim 1, characterized in that: The bottom right side of the filter box (7) is connected to an air outlet pipe (6). The right side of the front of the filter box (7) is connected to a movable door (5) via a hinge. The front of the movable door (5) is fixedly connected to a handle (4). The inner cavity of the filter box (7) is fixedly connected to a card holder (31), and the inner cavity of the card holder (31) is sequentially fitted with a glass fiber coalescing filter element (26) and an activated silicon filter layer (27) from top to bottom.

3. The integrated device for waste gas treatment and waste heat recovery in fused magnesia production according to claim 1, characterized in that: A partition (32) is fixedly connected to the middle of the inner cavity of the neutralization box (8). A through hole (24) is opened at the upper end of the inner surface of the partition (32). Observation windows (3) are provided on the left and right sides of the front of the neutralization box (8). Liquid outlets (12) are opened on the left and right sides of the back of the neutralization box (8). Liquid injection ports (9) are opened on the left and right sides of the top of the neutralization box (8). The ends of the liquid injection ports (9) and the liquid outlets (12) are threaded with sealing caps.

4. The integrated device for treating waste gas and recovering waste heat from fused magnesia production according to claim 1, characterized in that: The heat exchange box (10) has a water inlet (2) at the top and a water outlet (18) at the bottom of the back of the heat exchange box (10). Both the water outlet (18) and the water inlet (2) are threaded with sealing caps. The combustion box (1), the heat exchange box (10), the neutralization box (8) and the filter box (7) are all fixedly connected with support legs (11) around the bottom.

5. The integrated device for treating waste gas and recovering waste heat from fused magnesia production according to claim 1, characterized in that: The upper left end of the combustion chamber (1) is connected to the air intake pipe (16). The left side of the combustion chamber (1) and the lower end of the air intake pipe (16) are fixedly connected to the first housing (15). The top of the first housing (15) is connected to the bottom of the air intake pipe (16) through an inclined pipe. The left and right ends of the bottom of the neutralization chamber (8) are fixedly connected to the second housing (29) and the third housing (30) respectively. The inner surfaces of the first housing (15), the second housing (29) and the third housing (30) are all movably connected to fan blades (38). The fan blades (38) on the inner surfaces of the second housing (29) and the third housing (30) are connected by a single-sided toothed synchronous belt drive. The fan blades (38) on the inner surfaces of the second housing (29) and the first housing (15) are connected by a single-sided toothed synchronous belt drive. The outer surface of the fan blades (38) on the inner surface of the first housing (15) is movably connected to the first auxiliary rod (17), and the first auxiliary rod (17) is fixedly connected to the back of the combustion chamber (1).

6. The integrated device for treating waste gas and recovering waste heat from fused magnesia production according to claim 1, characterized in that: Hollow plates (33) are fixedly connected to the top left and right ends of the inner cavity of the neutralization box (8). Multiple atomizing nozzles (25) are connected to the bottom of the hollow plates (33). The tops of the second shell (29) and the third shell (30) are connected to the hollow plates (33) at the left and right ends respectively through pipes. A motor (13) is fixedly connected to the lower end of the back of the neutralization box (8). The output shaft of the motor (13) is connected to the fan blades (38) on the inner surface of the third shell (30) through a single-sided toothed synchronous belt. The output shaft of the motor (13) is movably connected to the second auxiliary rod (20), and the second auxiliary rod (20) is fixedly connected to the back of the neutralization box (8).

7. The integrated device for waste gas treatment and waste heat recovery in fused magnesia production according to claim 1, characterized in that: A battery box (14) is fixedly connected to the left end of the back of the neutralization box (8). A storage battery (37) is fixedly connected to the bottom of the inner cavity of the battery box (14). A charging socket (19) is opened on the back of the battery box (14). A sleeve (21) is fixedly connected to the right end of the back of the neutralization box (8). A stator (36) is fixedly connected to the inner side of the sleeve (21). A rotor (35) is movably connected to the middle end of the inner surface of the sleeve (21). The rear end of the rotor (35) is connected to the output shaft of the motor (13) through a single-sided toothed synchronous belt.

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