Potassium nitrate drying equipment with turnover structure

Abstract

The utility model relates to potassium nitrate production equipment technical field, concretely is a kind of potassium nitrate drying equipment with material turning structure, the inside symmetry of drying box is provided with two moving plate, the lower end of moving plate is vertically provided with multiple material turning rods, and the both ends of moving plate are through conveying table and are slidably connected with conveying table, two locating plates are symmetrically arranged on the both sides of conveying table, and the both ends of two moving plates are fixed by screw, the outside of one of locating plates is vertically provided with vertical rod, and chute is vertically arranged on vertical rod, and dynamic material turning mechanism is formed by moving plate and material turning rod, and the linkage of motor-disc-cylinder block is used to realize reciprocating turning of material layer, completely break the " material layer barrier " problem of traditional static drying, compared with traditional equipment, heat exchange area is significantly improved, crystal drying efficiency is high, effectively solve the technical problem of insufficient contact of bottom material and hot air.

Description

Technical Field

[0001] This utility model relates to the technical field of potassium nitrate production equipment, specifically a potassium nitrate drying equipment with a material turning structure. Background Technology

[0002] As a key piece of equipment in material drying, the drying bed achieves surface moisture evaporation through contact between hot airflow and the material. In the potassium nitrate crystal production process, the drying process directly affects crystal purity and production efficiency. Freshly crystallized potassium nitrate crystals contain free water and need to be dried in a drying bed to remove the moisture to a specified moisture content.

[0003] Existing drying beds have significant technical defects in the drying of potassium nitrate crystals: traditional static drying structures lack a turning mechanism, which causes the bottom material to be covered by the upper layer when crystals accumulate on the bed surface, forming a "material layer barrier". Specifically, the hot airflow can only contact the upper surface of the material layer, and the contact area between the bottom crystals and the hot air is insufficient, resulting in a significant reduction in heat exchange efficiency; crystal accumulation hinders the migration of internal moisture, significantly extending the conventional drying cycle; local overheating and moisture residue coexist, increasing the crystal agglomeration rate and affecting subsequent screening and packaging processes. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a potassium nitrate drying device with a material turning structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a potassium nitrate drying device with a turning structure, including a conveyor table, a conveyor belt on the conveyor table, two first side plates symmetrically arranged on both sides of the conveyor table, a second side plate fixedly arranged above the first side plates, a drying box arranged above the conveyor table, and the bottom end of the drying box fixedly arranged above the second side plate.

[0008] A hot air blower is fixedly installed at the upper end of the drying box, and multiple air outlets connected to the air outlet of the hot air blower are provided at the lower end of the drying box. Exhaust vents are provided on both sides of the drying box.

[0009] The drying oven has two symmetrically arranged movable plates inside. Multiple tilting rods are vertically arranged at the lower end of the movable plates. The two ends of the movable plates pass through the conveyor table and are slidably connected to the conveyor table. Two positioning plates are symmetrically arranged on both sides of the conveyor table. The positioning plates are fixed to the two ends of the movable plates by screws. A vertical rod is vertically arranged on the outer side of one of the positioning plates. A sliding groove is vertically arranged on the vertical rod. A motor is fixedly arranged at the upper end of the first side plate. A disc is provided at the output end of the motor. A cylindrical block is provided at the edge of the disc, passing through the sliding groove and slidably connected to the sliding groove.

[0010] Furthermore, the present invention includes the following improvements: a three-way exhaust pipe is provided above the drying box, both ends of the three-way exhaust pipe are connected to the exhaust port, and guide boxes are provided at both ends of the three-way exhaust pipe. The guide boxes are fixed to the outer wall of the drying box by screws, and the guide boxes are located outside the exhaust port. A filter plate is fixedly installed inside the guide boxes.

[0011] To facilitate material feeding, the present invention includes an improvement whereby a feeding box located above the conveyor belt is provided at the front end of the conveyor platform.

[0012] Furthermore, an improvement of this utility model is that a spreading rod is fixedly installed on the rear side of the feeding box, and the spreading rod is located above the conveyor belt.

[0013] Furthermore, the improvements of this utility model include that the vertical rod and the positioning plate are an integrated structure, and the side of the tipping rod near the feeding box has a pointed structure.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a potassium nitrate drying device with a turning structure, which has the following beneficial effects:

[0016] The dynamic material-turning mechanism, consisting of a moving plate and a turning rod, achieves reciprocating turning of the material layer through the linkage of a motor, a disc, and a cylindrical block, completely breaking the "material layer obstruction" problem of traditional static drying. Compared with traditional equipment, the heat exchange area is significantly increased, the crystal drying efficiency is high, and the technical problem of insufficient contact between the bottom material and hot air is effectively solved. Attached Figure Description

[0017] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a third-view three-dimensional structural diagram of the present invention;

[0020] Figure 4 This utility model Figure 3 A magnified schematic diagram of the local structure at point A;

[0021] Figure 5 This is a schematic diagram of the installation structure of the filter plate in this utility model;

[0022] Figure 6 This is a schematic diagram of the installation structure of the cylindrical block in this utility model;

[0023] Figure 7 This is a cross-sectional view of the material spreading rod in this utility model;

[0024] In the diagram: 1. Conveyor table; 2. First side plate; 3. Second side plate; 4. Drying box; 5. Hot air blower; 6. Three-way exhaust pipe; 7. Guide box; 8. Filter plate; 9. Feeding box; 10. Spreading rod; 11. Moving plate; 12. Tilting rod; 13. Positioning plate; 14. Vertical rod; 15. Motor; 16. Disc; 17. Slide chute; 18. Cylindrical block; 19. Conveyor belt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-7 The present invention provides a potassium nitrate drying device with a turning structure, including a conveyor table 1, a conveyor belt 19 on the conveyor table 1, two first side plates 2 symmetrically arranged on both sides of the conveyor table 1, a second side plate 3 fixedly arranged above the first side plates 2, a drying box 4 arranged above the conveyor table 1, and the bottom end of the drying box 4 fixedly arranged above the second side plate 3.

[0027] A hot air blower 5 is fixedly installed at the upper end of the drying box 4, and multiple air outlets communicating with the air outlet of the hot air blower 5 are provided at the lower end of the drying box 4. Air vents are provided on both sides of the drying box 4.

[0028] The drying oven 4 has two symmetrically arranged movable plates 11 inside. Multiple tilting rods 12 are vertically arranged at the lower end of the movable plates 11. The two ends of the movable plates 11 pass through the conveyor table 1 and are slidably connected to the conveyor table 1. Two positioning plates 13 are symmetrically arranged on both sides of the conveyor table 1. The positioning plates 13 are fixed to the two ends of the two movable plates 11 by screws. A vertical rod 14 is vertically arranged on the outer side of one of the positioning plates 13. A sliding groove 17 is vertically arranged on the vertical rod 14. A motor 15 is fixedly arranged at the upper end of the first side plate 2. A disc 16 is provided at the output end of the motor 15. A cylindrical block 18 is provided at the edge of the disc 16, passing through the sliding groove 17 and slidably connected to the sliding groove 17.

[0029] The vertical rod 14 and the positioning plate 13 are an integrated structure, and the tipping rod 12 has a pointed structure on the side near the feeding box 9.

[0030] Material pretreatment and conveying preparation:

[0031] The front end of the conveyor table 1 is provided with a feeding box 9 located above the conveyor belt 19.

[0032] A spreading rod 10 is fixedly installed on the rear side of the feeding box 9, and the spreading rod 10 is located above the conveyor belt 19.

[0033] Workers feed potassium nitrate crystals into the front end of the conveyor belt 19 through the feeding box 9. The spreading bar 10 on the back of the feeding box 9 initially spreads the accumulated crystals, so that the crystals form a uniform material layer on the conveyor belt 19.

[0034] The first side plates 2 on both sides of the conveyor table 1 and the second side plate 3 above it together support the drying box 4, ensuring the overall stability of the equipment structure.

[0035] Hot air circulation system starts:

[0036] Start the hot air blower 5 at the top of the drying box 4. The hot air is diverted through the air inlet duct (through the drying box 4) to the air outlet at the bottom of the drying box 4 and blown evenly onto the potassium nitrate crystals on the surface of the conveyor belt 19.

[0037] The drying oven 4 is provided with a three-way exhaust pipe 6 at the top. Both ends of the three-way exhaust pipe 6 are connected to the exhaust port. Both ends of the three-way exhaust pipe 6 are provided with guide boxes 7. The guide boxes 7 are fixed to the outer wall of the drying oven 4 by screws and are located outside the exhaust port. The guide boxes 7 are fixedly installed inside the guide boxes 7.

[0038] The exhaust vents on both sides of the drying oven 4, together with the guide box 7 and the filter plate 8, filter the hot and humid air and discharge it, forming a closed-loop hot air circulation to improve the heat energy utilization rate.

[0039] Dynamic operation of the material turning mechanism:

[0040] The motor 15 at the upper end of the first side plate 2 drives the disc 16 to rotate. The cylindrical block 18 on the edge of the disc 16 slides back and forth in the groove 17 of the vertical rod 14, causing the vertical rod 14 and the positioning plate 13 to move laterally.

[0041] The positioning plate 13 slides synchronously within the conveyor table 1 via the movable plate 11 fixed by screws, causing the material-turning rod 12 at the lower end of the movable plate 11 to perform reciprocating material-turning actions within the drying chamber 4.

[0042] The tip of the flipping rod 12 is inserted into the crystal material layer, flipping the bottom material to the outer layer to ensure that the hot airflow is in full contact with the crystal.

[0043] Continuous drying and discharge:

[0044] The conveyor belt 19 operates continuously, transporting the flattened and turned potassium nitrate crystals from below the drying box 4 to the rear end. During this process, the hot air blower 5 continuously provides hot air, and the turning rod 12 continuously turns the material layer until the moisture content of the crystals drops to the specified moisture content, and finally the conveyor belt 19 sends them out of the equipment.

[0045] Conveyor Belt 19:

[0046] Type selection: Food-grade polytetrafluoroethylene (PTFE) mesh belt is selected, with a mesh diameter of 2-3mm, a thickness of 0.5mm, a temperature resistance range of -20℃ to 260℃, and has the characteristics of resisting slight corrosion from potassium nitrate crystals and low friction; the transmission method adopts gear meshing to avoid slippage affecting the stability of conveying.

[0047] Drying oven 4:

[0048] Material selection: The enclosure is made of 304 stainless steel plate (2mm thick), with internal welded baffles (15° tilt angle) to ensure uniform hot air diffusion; the outer wall of the enclosure is wrapped with 50mm thick aluminum silicate insulation cotton to reduce heat loss, and the surface is covered with a 0.3mm thick aluminum foil reflective layer.

[0049] Hot air blower 5:

[0050] Parameter selection: Select an electric heating hot air blower 5 (power 3-5kW), with adjustable outlet temperature (50-120℃), equipped with a centrifugal fan (air volume 1000-1500m³ / h). 3 / h), the air outlet is connected to the three-way exhaust pipe 6 with a silicone flexible hose, and has an overheat protection function.

[0051] Moving plate 11 and tilting rod 12:

[0052] Material selection: The moving plate 11 is made of 304 stainless steel plate; the flipping rod 12 is made of No. 45 steel (10mm in diameter), the tip is quenched (hardness HRC50-55), the surface is chrome-plated for rust prevention, and it is fixed to the moving plate 11 by welding, with uniform spacing.

[0053] Positioning plate 13 and vertical rod 14:

[0054] Material selection: The positioning plate 13 is made of Q235 steel plate with galvanized surface treatment and is fixed to the moving plate 11 by M8 stainless steel screws; the vertical rod 14 is integrally cast with the positioning plate 13 (material HT200 gray cast iron), and the inner wall of the slide groove 17 is milled with a precision of Ra1.6μm to ensure smooth sliding of the cylindrical block 18.

[0055] Motor 15 selection: Select a three-phase asynchronous motor (power 0.75-1.5kW, speed 1450r / min), equipped with a gearbox, output torque ≥50N·m; the disc 16 is made of 45 steel with heat treatment, the cylindrical block 18 is made of wear-resistant cast iron, and is welded and fixed to the disc 16. The part inserted into the slide groove 17 is rounded.

[0056] Feeding box 9:

[0057] Material selection: 304 stainless steel plate is used for welding, and the inner side is polished (Ra0.8μm) to avoid crystal residue accumulation.

[0058] Material spreading rod 10:

[0059] Material selection: The rod body is made of 304 stainless steel.

[0060] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the present 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 present invention.

Claims

1. A potassium nitrate drying device with a turning structure, comprising a conveyor table (1) and a conveyor belt (19) on the conveyor table (1), characterized in that: Two first side plates (2) are symmetrically arranged on both sides of the conveyor table (1), and a second side plate (3) is fixedly arranged above the first side plate (2). A drying box (4) is provided above the conveyor table (1), and the bottom end of the drying box (4) is fixed to the upper end of the second side plate (3). A hot air blower (5) is fixedly installed at the upper end of the drying box (4), and multiple air outlets connected to the air outlet of the hot air blower (5) are provided at the lower end of the drying box (4). Air vents are provided on both sides of the drying box (4). The drying box (4) is symmetrically arranged with two movable plates (11) inside. Multiple turning rods (12) are vertically arranged at the lower end of the movable plates (11). The two ends of the movable plates (11) pass through the conveyor table (1) and are slidably connected to the conveyor table (1). Two positioning plates (13) are symmetrically arranged on both sides of the conveyor table (1). The positioning plates (13) are fixed to the two ends of the two movable plates (11) by screws. A vertical rod (14) is vertically arranged on the outer side of one of the positioning plates (13). A sliding groove (17) is vertically arranged on the vertical rod (14). A motor (15) is fixedly arranged at the upper end of the first side plate (2). A disc (16) is provided at the output end of the motor (15). A cylindrical block (18) is provided at the edge of the disc (16) and is slidably connected to the sliding groove (17).

2. The potassium nitrate drying equipment with a turning structure according to claim 1, characterized in that: The drying box (4) is provided with a three-way exhaust pipe (6) above it, and the two ends of the three-way exhaust pipe (6) are connected to the exhaust port.

3. A potassium nitrate drying device with a turning structure according to claim 2, characterized in that: The three-way exhaust pipe (6) is provided with guide boxes (7) at both ends. The guide boxes (7) are fixed to the outer wall of the drying box (4) by screws, and the guide boxes (7) are located outside the exhaust port. The filter plate (8) is fixedly installed inside the guide boxes (7).

4. A potassium nitrate drying device with a turning structure according to claim 3, characterized in that: The front end of the conveyor (1) is provided with a feeding box (9) located above the conveyor belt (19).

5. A potassium nitrate drying device with a turning structure according to claim 4, characterized in that: A spreading rod (10) is fixedly installed on the rear side of the feeding box (9), and the spreading rod (10) is located above the conveyor belt (19).

6. A potassium nitrate drying device with a turning structure according to claim 5, characterized in that: The vertical rod (14) and the positioning plate (13) are an integrated structure, and the tipping rod (12) has a pointed structure on the side near the feeding box (9).

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