Coal gangue-based molecular sieve preparation system

Abstract

The application discloses a coal gangue-based molecular sieve preparation system, which comprises a high mounting plate, a low mounting plate and a kiln cylinder, the high mounting plate is provided with an exhaust port and a feeding port, the low mounting plate is provided with a burner and an outlet, the kiln cylinder is connected with the driving motor shaft of the driving motor through a gear set, the outer side of the feeding port is provided with a baffle for sealing the feeding port and guiding the raw materials, the outer side of the outlet is provided with an end cover, and the high mounting plate and the low mounting plate are provided with a baffle cover for gathering heat, the system can fully heat and calcine the coal gangue by the heat entering the kiln cylinder, thereby improving the yield of the subsequent preparation of the molecular sieve, and the outer side wall of the kiln cylinder can be cooled without setting a cooling fan set, so that energy can be saved and the maintenance of the staff can be facilitated.

Description

Technical Field

[0001] This invention relates to the field of coal gangue processing technology, specifically to a molecular sieve preparation system based on coal gangue. Background Technology

[0002] Coal gangue is a solid waste generated during coal mining and processing. It is a symbiotic gangue mineral produced during coal mining and washing operations, accounting for approximately 10% to 15% of the raw coal output. To date, its accumulated volume exceeds 4.1 billion tons. Coal gangue is a mixture of various minerals, primarily consisting of claystone, aluminous rock, sandstone, and carbonates. The elemental composition of these minerals includes oxides of SiO2, Al2O3, Fe2O3, CaO, MgO, TiO2, K2O, and Na2O. Coal gangue is considered a mineral resource with enormous development potential; therefore, comprehensive research on the application of solid waste resources is considered one of the most important methods for treating and utilizing coal gangue.

[0003] Molecular sieves, also known as zeolites, are porous sodium aluminosilicate salts. They possess a unique crystal structure, with a framework composed of SiO4 tetrahedra and AlO4 tetrahedra linked together by angularly spaced oxygen atoms, forming regular channels or cage-like structures. This gives molecular sieves a very large specific surface area and excellent pore structure, along with strong adsorption capacity, high cation exchange capacity, and good hydrothermal stability. Therefore, molecular sieves have a wide range of applications, including but not limited to adsorbents, catalysts, ion exchangers, and antibacterial materials, among other emerging research fields.

[0004] Molecular sieves share many similarities in material composition with coal gangue. To expand the application of coal gangue, scientists have conducted extensive research on the preparation of molecular sieves from coal gangue and proposed many schemes. Currently, calcination is an important process in the preparation of molecular sieves from coal gangue. Generally, a rotary kiln can be used for calcination. However, in most current rotary kilns, the material is located at the lowest point inside the kiln during calcination, and because the heat rises, the heat utilization of the rotary kiln is not ideal. To solve the above problems, this invention provides a molecular sieve preparation system based on coal gangue. Summary of the Invention

[0005] The purpose of this invention is to provide a molecular sieve preparation system based on coal gangue to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a molecular sieve preparation system based on coal gangue, comprising a high mounting plate, a low mounting plate, and a kiln. The high mounting plate has an exhaust port and a feed port, and the low mounting plate is equipped with a burner and has a discharge port. The kiln is connected to the drive motor shaft of a drive motor via a gear set. The two ends of the kiln are rotatably connected to the high mounting plate and the low mounting plate respectively via sealing rings. A baffle for sealing the feed port and guiding the raw material is provided on the outside of the feed port. An end cap is provided on the outside of the discharge port. A baffle for accumulating heat is provided between the high mounting plate and the low mounting plate. Multiple protrusions are fixedly connected to the inner wall of the kiln, and the multiple protrusions are evenly arranged in a circular shape on the inner wall of the kiln.

[0007] Preferably, the lower end of the baffle is hinged to the high mounting plate via an ear plate fixedly connected to the high mounting plate, and partitions are symmetrically provided on the inner side of the baffle. The high mounting plate has a clearance groove adapted to the partition, a connecting rod is fixedly connected to the partition, a limiting shaft is fixedly connected to the connecting rod, and an arc groove adapted to the limiting shaft is provided on the side wall of the feed port.

[0008] Preferably, the lower sidewall of the feed inlet is a sloping surface with a higher outer side and a lower inner side, and an insulating cloth is connected between the lower sidewall of the feed inlet and the baffle.

[0009] Preferably, the baffle includes an arc plate and two side plates. The arc plate is located above the burner, and the two side plates are fixedly connected to both sides of the arc plate, and the two side plates are inclined plates with the inner side higher than the outer side.

[0010] Preferably, multiple guide plates are fixedly connected to the inner side of the arc plate, and the height of the guide plate near the discharge port is higher than that of the other end, and the lower end of the guide plate is an arc surface.

[0011] Preferably, multiple support rings are fixedly sleeved on the outer wall of the kiln cylinder, and multiple support platforms are provided below the kiln cylinder, with multiple support sleeves rotatably connected to the support platforms, and the support sleeves rotatably connected to the support platforms.

[0012] Preferably, the support ring is hollow and contains heat dissipation liquid, the support platform is also filled with heat dissipation liquid, and multiple fixing rods are fixedly connected to the support platform, with multiple heat dissipation fins fixedly connected to the fixing rods.

[0013] Preferably, a first protective cover is fixedly connected to the outer side of the high mounting plate, and a second protective cover is fixedly connected to the outer side of the low mounting plate. The first protective cover has a through opening, and a baffle is provided on the outside of the through opening. An inclined plate is fixedly connected to the inside of the second protective cover.

[0014] The upper surfaces of the first protective cover, the second protective cover, and the baffle are all provided with air vents, and filter plates are installed on the upper surfaces of the first protective cover, the second protective cover, and the baffle.

[0015] Preferably, an exhaust fan is installed at the upper inner end of the second protective cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the present invention achieves the concentration of heat in the lower half of the kiln cylinder by the cooperation between the arc plate and the side plate, thereby making good use of heat. At the same time, the setting of the guide plate can conduct the heat inside the arc plate downward, thereby allowing the coal gangue to be better burned, so as to improve the yield of subsequent molecular sieve preparation.

[0017] By setting up support rings, support jackets and support platforms, it is possible to not only stably support the kiln cylinder, but also dissipate heat from the outer wall of the kiln cylinder under the action of the internal heat dissipation liquid.

[0018] This invention allows the heat entering the kiln to fully heat and calcine the materials, while simultaneously dissipating heat from the outer wall of the kiln without the need for a cooling fan unit. This saves energy and facilitates maintenance by staff. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the inclined plate portion of the present invention;

[0021] Figure 3 This is the front view of the present invention;

[0022] Figure 4 This is a cross-sectional view of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged view of point A;

[0024] Figure 6 For the present invention Figure 4 Enlarged view of point B;

[0025] Figure 7 This is an exploded view of the filter plate and the first protective cover of the present invention;

[0026] Figure 8 This is an exploded view of the filter plate and the second protective cover of the present invention;

[0027] Figure 9 This is a schematic diagram of the open state of the baffle of the present invention;

[0028] Figure 10This is a schematic diagram of the structure of the boss of the present invention;

[0029] Figure 11 This is a schematic diagram showing the connection between the side plate and the arc plate of the present invention;

[0030] Figure 12 This is a cross-sectional view of the support platform of the present invention;

[0031] Figure 13 This is a schematic diagram showing the connection between the connecting rod and the limiting shaft of the present invention;

[0032] Figure 14 This is a schematic diagram of the structure of the fixing rod and heat sink of the present invention.

[0033] In the diagram: 1. High mounting plate, 2. Low mounting plate, 3. Kiln cylinder, 4. Exhaust port, 5. Feed inlet, 6. Burner, 7. Discharge port, 8. Gear set, 9. Drive motor, 10. Support sleeve, 11. Baffle, 12. End cover, 13. Baffle cover, 130. Arc plate, 131. Side plate, 132. Guide plate, 14. Boss, 15. Limiting shaft, 16. Arc groove, 17. Insulation cloth, 18. Support 19. Support ring, 20. Support platform, 21. First protective cover, 22. Second protective cover, 23. Through-hole, 24. Baffle, 25. Air outlet, 26. Filter plate, 27. Inclined plate, 28. Electric push rod, 29. Exhaust fan, 30. Partition plate, 31. Relief groove, 32. Sealing ring, 33. Suction motor, 34. Mounting rod, 35. Ear plate, 36. Connecting rod, 37. Fixing rod, 38. Heat sink. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-14This invention provides a technical solution: a molecular sieve preparation system based on coal gangue, comprising a high mounting plate 1, a low mounting plate 2, and a kiln 3. The high mounting plate 1 and the low mounting plate 2 are respectively mounted on a pre-cast concrete base by anchor bolts. The kiln 3 is located between the high mounting plate 1 and the low mounting plate 2, and the height of the end of the kiln 3 near the high mounting plate 1 is higher than the height of the end of the kiln 3 near the low mounting plate 2. The high mounting plate 1 has an exhaust port 4 and a feed port 5. Pretreated coal gangue is added into the kiln 3 through the feed port 5, while most of the waste gas generated from roasting the coal gangue is discharged through the exhaust port 4. The low mounting plate 2 is equipped with a burner 6 and has a discharge port 7. The end of the burner 6 that sprays heat passes through the low mounting plate 2. The burner 6 is inserted into the kiln cylinder 3 through the through hole, and is connected to the low mounting plate 2 by bolts. The calcined coal gangue is discharged through the discharge port 7, cooled, and then proceeds to the next step of molecular sieve preparation. The kiln cylinder 3 is connected to the drive motor shaft of the drive motor 9 via a gear set 8. The gear set 8 includes a driving gear and a driven gear ring. The driving gear is fixedly connected to the drive motor shaft of the drive motor 9, and the driven gear ring is fixedly sleeved on the outside of the kiln cylinder 3. The driving gear and the driven gear ring are meshed. The rotation of the drive motor shaft of the drive motor 9 will drive the kiln cylinder 3 to rotate. The two ends of the kiln cylinder 3 are rotatably connected to the high mounting plate 1 and the low mounting plate 2 respectively through sealing rings 31. Both the high mounting plate 1 and the low mounting plate 2 are fixedly connected with sealing rings. The sealing ring 31 has an L-shaped cross-section. Fixed rings matching the sealing ring 31 are fixedly connected to both ends of the kiln cylinder 3, allowing them to rotate without detaching. A baffle 11 is provided on the outer side of the feed inlet 5 to seal it and guide the raw materials. The baffle 11 can seal the feed inlet 5 when not in use, slowing down the loss of temperature inside the kiln cylinder 3, thus reducing the preheating time during the next use. During firing, coal gangue can be directly lifted onto the baffle 11, which guides the falling coal gangue into the kiln cylinder 3. An end cap 12 is provided on the outer side of the discharge port 7. The discharge port 7 can be sealed when not in use to slow down the loss of temperature inside the kiln 3. When in use, the end cover 12 can be opened to allow the roasted coal gangue to be discharged smoothly. A baffle 13 for concentrating heat is provided between the high mounting plate 1 and the low mounting plate 2. The baffle 13 can concentrate the heat emitted by the burner 6 at the place where the coal gangue material (granular material or powder) is deposited, that is, the space at the bottom of the kiln 3, so that the heat can be better used for roasting. In addition, multiple protrusions 14 are fixedly connected to the inner wall of the kiln 3, and the multiple protrusions 14 are evenly arranged in a circular shape on the inner wall of the kiln 3. The protrusions 14 can lift some of the coal gangue when the kiln 3 rotates, and the lifted coal gangue falls from a height.This allows the coal gangue to be continuously turned over as the kiln cylinder rotates, thus achieving a better roasting effect.

[0036] Specifically, the lower end of the baffle 11 is hinged to the high mounting plate 1 via an ear plate 34 fixedly connected to it. The lower end of the baffle 11 is rotatably connected to the ear plate 34. Symmetrical partitions 29 are provided on the inner side of the baffle 11, and the partitions 29 are fixedly connected to the baffle 11. A U-shaped transport channel is formed between the two partitions 29 and the baffle 11, allowing coal gangue falling onto it to slide down the inclined angle of the baffle 11 into the interior of the kiln cylinder 3. The high mounting plate 1 has openings that connect with the partitions 29. When the gate 11 is closed, the partition 29 can be inserted into the recess 30 to allow the gate 11 to seal the feed inlet 5 effectively. A connecting rod 35 is fixedly connected to the partition 29, and a limiting shaft 15 is fixedly connected to the connecting rod 35. An arc groove 16 that matches the limiting shaft 15 is opened on the side wall of the feed inlet 5. The setting of the limiting shaft 15 and the arc groove 16 can ensure that the gate 11 can be stably tilted after it is opened.

[0037] To allow the coal gangue entering the feed inlet 5 through the baffle 11 to slide more effectively into the kiln cylinder, the following configuration can be adopted: Specifically, the lower side wall of the feed inlet 5 is a slope with a higher outer surface and a lower inner surface. The slope prevents the coal gangue from remaining on the side wall of the feed inlet 5 and allows it to slide more effectively into the kiln cylinder 3. Furthermore, an insulation cloth 17 is connected between the lower side wall of the feed inlet 5 and the baffle 11. The insulation cloth 17 can block the gap between the baffle 11 and the side wall of the feed inlet 5, which can prevent the coal gangue from spilling and also achieve a good insulation effect after the baffle 11 is closed.

[0038] Specifically, the baffle 13 includes an arc plate 130 and two side plates 131. The arc plate 130 is located above the burner 6, and the two side plates 131 are fixedly connected to both sides of the arc plate 130. The arrangement of the side plates 131 and the arc plate 130 allows most of the heat from the burner 6 to be located below the baffle 13, reducing the heat loss to the top of the baffle 13. The area below the baffle 13 is where coal gangue accumulates, thus allowing the heat to be utilized more fully. The two side plates 131 are inclined plates with a higher inner side and a lower outer side. This arrangement can better concentrate the heat and also prevent coal gangue residue from remaining on the side plate 131 near the feed inlet 5.

[0039] To further guide the heat, guide plates 132 are provided. Specifically, multiple guide plates 132 are fixedly connected to the inner side of the arc plate 130, and the height of the guide plate 132 near the discharge port 7 is higher than the height of the other end, and the lower end of the guide plate 132 is an arc surface. Figure 4The guide plate 132 shown can better conduct heat to the lower part of the arc plate 130, so that the heat can be used more fully.

[0040] To facilitate the rotation of the kiln cylinder 3, a support sleeve 10 is provided. Specifically, multiple support rings 18 are fixedly sleeved on the outer wall of the kiln cylinder 3, and multiple support platforms 19 are provided below the kiln cylinder 3. Multiple support sleeves 10 are rotatably connected to the support platforms 19, and the support sleeves 10 are rotatably connected to the support platforms 19. The dimensions of the two ends of the support sleeve 10 are larger than the dimensions in the middle, and the width of the middle recess is adapted to the width of the support rings 18. This not only lifts the support rings 18 but also stably fixes their positions. When the support rings 18 rotate with the kiln cylinder 3, the support sleeves 10 also rotate accordingly, thereby preventing the kiln cylinder 3 from exerting force on the high mounting plate 1 and the low mounting plate 2, allowing the kiln cylinder 3 to rotate more effectively.

[0041] To reduce the temperature of the outer wall of the kiln cylinder 3 and prevent deformation under prolonged high temperatures, a heat dissipation fluid is installed inside the support ring 18 and the support platform 19. Specifically, the support ring 18 is hollow and contains heat dissipation fluid, which effectively absorbs the temperature of the outer wall of the kiln cylinder 3. The support platform 19 also contains heat dissipation fluid, which soaks the support jackets 10. Multiple support jackets 10 fit tightly against the support ring 18, absorbing heat from the support ring 18 and its internal heat dissipation fluid, thus effectively reducing the temperature of the outer wall of the kiln cylinder 3. Multiple fixing rods 36 are fixedly connected to the support platform 19, and multiple heat dissipation fins 37 are fixedly connected to the fixing rods 36. The fixing rods 36 and heat dissipation fins 37 allow the heat dissipation fluid inside the support platform 19 to better dissipate heat. (For better demonstration...) Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 10 and attached Figure 12 The fixing rod 36 and heat sink 37 are not shown. Please refer to the appendix for details on the specific form of the fixing rod 36 and heat sink 37. Figure 14 .

[0042] Specifically, a first protective cover 20 is fixedly connected to the outer surface of the high mounting plate 1, covering the exhaust pipe 4 and the feed inlet 5. A second protective cover 21 is fixedly connected to the outer surface of the low mounting plate 2, covering the discharge outlet 7. A through-hole 22 is opened on the first protective cover 20, and a baffle 23 is provided on the outside of the through-hole 22. The pre-treated coal gangue material from the previous step can be lifted through the through-hole 22 into the interior of the first protective cover 20 by a conveyor belt and fall into the interior of the baffle 11. The baffle 11 is hinged to the output rod of the electric push rod 27 installed inside the first protective cover 20. The baffle 11 is hinged to the inner wall of the first protective cover 20. The opening and closing of the baffle 11 can be controlled by the corresponding electric push rod 27. The interior of the second protective cover 21 is fixedly connected to the inclined plate 26, which can play a guiding role. The calcined coal gangue falls into the inclined plate 26 through the discharge port 7 and then slides down through the inclined plate 26. The end cover 12 is hinged to the low mounting plate 2 through another ear plate 34. The end cover 12 is also hinged to the output rod of the electric push rod 27 installed inside the second protective cover 21. The electric push rod 27 inside the second protective cover 21 is hinged to the inner side of the second protective cover 21. The opening and closing of the end cover 12 can be controlled by the corresponding electric push rod 27.

[0043] The upper surfaces of the first protective cover 20, the second protective cover 21, and the baffle 23 are all provided with air vents 24, and the upper surfaces of the first protective cover 20, the second protective cover 21, and the baffle 23 are all provided with filter plates 25 (which can be connected to corresponding pipes for collection). Because the temperature of the exhaust gas is higher than that of the outside air, the exhaust gas will start to rise after moving to the outside of the kiln cylinder 3, and can be discharged through the air vents 24 of the first protective cover 20, the second protective cover 21, and the baffle 23. The filter plates 25 will filter the exhaust gas when it is discharged.

[0044] The upper side of the first protective cover 20, the second protective cover 21, and the baffle 23 all have mounting grooves for installing the filter plate 25.

[0045] To facilitate faster cooling of the roasted coal gangue and subsequent processing, an exhaust fan 28 is installed. Specifically, an exhaust fan 28 is installed at the upper part of the interior of the second protective cover 21. The exhaust fan 28 blows air onto the upper part of the second protective cover 21, which increases the airflow velocity on the inclined plate 26, allowing the coal gangue material on it to cool faster. The exhaust fan 28 is driven by a suction motor 32, which is mounted on a mounting rod 33. The motor shaft passes through the mounting rod 33 and is fixedly connected to the exhaust fan 28. The mounting rod 33 is fixedly connected inside the second protective cover 21.

[0046] The drive motor 9, electric push rod 27, and suction motor 32 are all connected to an external power source via cables.

[0047] Working principle: Before use, the burner 6 is started to preheat the inside of the kiln cylinder 3. Then, the baffle 11 and end cover 12 are opened, and the drive motor 9 is started to lift the pretreated coal gangue material to be roasted onto the baffle 11. The coal gangue material will fall into the inside of the kiln cylinder 3 along the baffle 11. After entering the inside of the kiln cylinder 3, the coal gangue material begins to roast. At the same time, under its own gravity and the rotation of the kiln cylinder 3, the coal gangue material is continuously turned over and slides towards the discharge port 7. Finally, the coal gangue material is roasted during its movement inside the kiln cylinder 3 and is discharged through the discharge port 7 for the next step of molecular sieve preparation.

[0048] 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. A molecular sieve preparation system based on coal gangue, comprising a high mounting plate (1), a low mounting plate (2), and a kiln (3), wherein the high mounting plate (1) has an exhaust port (4) and a feed port (5), the low mounting plate (2) is equipped with a burner (6) and has a discharge port (7), and the kiln (3) is interconnected with the drive motor shaft of a drive motor (9) via a gear set (8), characterized in that: The two ends of the kiln (3) are rotatably connected to the high mounting plate (1) and the low mounting plate (2) respectively through sealing rings (31). The outside of the feed inlet (5) is provided with a baffle (11) for sealing the feed inlet (5) and guiding the raw material. The outside of the discharge port (7) is provided with an end cap (12). A baffle (13) for accumulating heat is provided between the high mounting plate (1) and the low mounting plate (2). Multiple bosses (14) are fixedly connected to the inner wall of the kiln (3). The multiple bosses (14) are evenly arranged in a circular shape on the inner wall of the kiln (3). The baffle (13) includes an arc plate (130) and two side plates (131). The arc plate (130) is located above the burner (6). The two side plates (131) are fixedly connected to both sides of the arc plate (130). The two side plates (131) are inclined plates with the inner side higher than the outer side.

2. The molecular sieve preparation system based on coal gangue according to claim 1, characterized in that: The lower end of the baffle (11) is hinged to the high mounting plate (1) via an ear plate (34) fixedly connected to the high mounting plate (1). The baffle (11) has symmetrical partitions (29) on its inner side. The high mounting plate (1) has a relief groove (30) adapted to the partition (29). A connecting rod (35) is fixedly connected to the partition (29). A limiting shaft (15) is fixedly connected to the connecting rod (35). An arc groove (16) adapted to the limiting shaft (15) is opened on the side wall of the feed port (5).

3. The molecular sieve preparation system based on coal gangue according to claim 2, characterized in that: The lower side wall of the feed inlet (5) is a slope with the outside higher than the inside, and a heat insulation cloth (17) is connected between the lower side wall of the feed inlet (5) and the baffle (11).

4. The molecular sieve preparation system based on coal gangue according to claim 1, characterized in that: Multiple guide plates (132) are fixedly connected to the inner side of the arc plate (130), and the height of the guide plate (132) near the discharge port (7) is higher than the height of the other end, and the lower end of the guide plate (132) is an arc surface.

5. The molecular sieve preparation system based on coal gangue according to claim 1, characterized in that: Multiple support rings (18) are fixedly sleeved on the outer side wall of the kiln cylinder (3). Multiple support platforms (19) are provided below the kiln cylinder (3), and multiple support sleeves (10) are rotatably connected to the support platforms (19). The support sleeves (10) are rotatably connected to the support platforms (19).

6. The molecular sieve preparation system based on coal gangue according to claim 5, characterized in that: The support ring (18) is hollow and contains heat dissipation liquid. The support platform (19) also contains heat dissipation liquid. Multiple fixing rods (36) are fixedly connected to the support platform (19), and multiple heat dissipation fins (37) are fixedly connected to the fixing rods (36).

7. The molecular sieve preparation system based on coal gangue according to claim 1, characterized in that: A first protective cover (20) is fixedly connected to the outer side of the high mounting plate (1), and a second protective cover (21) is fixedly connected to the outer side of the low mounting plate (2). A through opening (22) is opened on the first protective cover (20), and a baffle (23) is provided on the outside of the through opening (22). An inclined plate (26) is fixedly connected inside the second protective cover (21). The upper surfaces of the first protective cover (20), the second protective cover (21) and the baffle (23) are all provided with air vents (24), and the upper surfaces of the first protective cover (20), the second protective cover (21) and the baffle (23) are all provided with filter plates (25).

8. The molecular sieve preparation system based on coal gangue according to claim 7, characterized in that: An exhaust fan (28) is installed at the upper part of the interior of the second protective cover (21).

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