Steel lining plastic rotary wet purification equipment

Abstract

The utility model relates to steel lining plastic rotary wet process purification equipment, which comprises a cylinder and a base, the cylinder is horizontally and movably arranged on the base, the cylinder comprises a base layer, a transition layer and a functional layer from outside to inside, the base layer is made of steel, the transition layer is a diamond steel mesh and is fixedly welded on the inner side of the base layer, and the functional layer is arranged on the base layer. A transition layer is arranged in the cylinder body, the functional layer covers the surface of the transition layer, a guide plate is further arranged in the cylinder body, the guide plate comprises a base body layer, the transition layer and the functional layer, the guide plate and the cylinder body are integrally formed, the guide plate is of a sectional type, the guide plate is spirally arranged in the circumferential direction of the cylinder body, and every two adjacent guide plates are designed in a staggered mode. The barrel of the composite structure is long-acting and corrosion-resistant, and the integrated guide plate is integrated in the barrel, so that the material mixing efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a steel-lined plastic rotary wet purification device. Background Technology

[0002] Quartz sand, as a fundamental raw material for high-end industries such as photovoltaic glass and semiconductor packaging, has increasingly stringent purity requirements (SiO2 content ≥ 99.99%). Wet acid leaching purification, due to its high removal rate (>90%) of impurities such as Fe2O3 and Al2O3, has become a core process in industrial production (see "Non-metallic Mineral Processing Technology and Application Handbook"). This process requires a dilute sulfuric acid environment (concentration 5%-20%), where mechanical stirring ensures sufficient contact between the acid and quartz sand particles for reaction, typically lasting 2-4 hours. Currently, static or dynamic reactor systems are commonly used. The static reactor system is an enamel-lined reactor with a PTFE coating, where an anchor stirrer achieves solid-liquid mixing. The current system is suitable, but it suffers from uneven reaction due to dead zones in the mixing (acid concentration difference of up to 35% between the center and the edges). Furthermore, the enamel layer is prone to micro-cracks under frequent thermal shocks, leading to corrosion of the base metal (failure cycle <6 months). The dynamic roller device uses a 304 stainless steel roller for continuous pickling, with lifting baffles inside the roller to enhance mixing. However, the metal material still experiences pitting corrosion under long-term acidic conditions (annual corrosion rate >0.5mm), requiring monthly shutdowns for passivation treatment, severely restricting production efficiency. To address these issues, we need to further improve the system based on customer requirements. Utility Model Content

[0003] Therefore, it is necessary to provide a steel-lined plastic rotary wet purification equipment to address the above problems.

[0004] A steel-lined plastic rotary wet purification device includes a cylinder and a base. The cylinder is horizontally and movably mounted on the base. From the outside to the inside, the cylinder includes a base layer, a transition layer, and a functional layer. The base layer is made of steel. The transition layer is a diamond-shaped steel mesh, fixedly welded to the inside of the base layer. The functional layer covers the surface of the transition layer. A guide plate is also provided inside the cylinder. The guide plate includes the base layer, the transition layer, and the functional layer, and is integrally formed with the cylinder. The guide plate is segmented and spirally arranged along the circumferential direction of the cylinder. Adjacent guide plates are staggered.

[0005] Preferably, the number of guide plates is six sets, which are evenly distributed and staggered on the inner wall of the cylinder.

[0006] Preferably, the height of the guide plate is one-eighth to one-quarter of the inner diameter of the cylinder.

[0007] Preferably, the guide plate has a triangular cross-section, the upper surface of the guide plate is wavy, and openings are provided on the surface of the guide plate.

[0008] Preferably, graphite sealing heads are provided at both ends of the cylinder, and the end face of the graphite sealing head is provided with a sealing lip.

[0009] Preferably, the outer periphery of the cylinder is provided with a support ring and a toothed ring, the toothed ring is disposed between two sets of support rings, the upper end of the base is provided with an annular groove, a roller is disposed in the annular groove, and the support ring and the roller are in movable contact.

[0010] Preferably, the functional layer is made of low-density polyethylene and is sintered onto the surface of the transition layer by molding.

[0011] The advantages of this utility model are: the composite structure of the cylinder provides long-term corrosion resistance, and the integrated guide plate inside the cylinder effectively improves the material mixing efficiency. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of a steel-lined plastic rotary wet purification device according to one embodiment;

[0013] Figure 2 A top view schematic diagram of a steel-lined plastic rotary wet purification equipment;

[0014] Figure 3 for Figure 2 Schematic diagram of the sectional view along the AA direction. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] like Figures 1-3As shown, a steel-lined plastic rotary wet purification device includes a cylinder 1 and a base 2. The cylinder 1 is horizontally and movably mounted on the base 2. From the outside to the inside, the cylinder 1 includes a base layer 11, a transition layer 12, and a functional layer 13. The base layer 11 is made of steel. The transition layer 12 is a diamond-shaped steel mesh, which is fixedly welded to the inside of the base layer 11. The functional layer 13 covers the surface of the transition layer 12. A guide plate 3 is also provided inside the cylinder 1. The guide plate 3 includes the base layer 11, the transition layer 12, and the functional layer 13, and is integrally formed with the cylinder 1. The guide plate 3 is segmented and spirally arranged along the circumferential direction of the cylinder 1. Adjacent guide plates 3 are staggered. Specifically, the cylinder 1 is movably mounted on the base 2, allowing it to rotate on the base 2 under external force, thereby rotating the material inside the cylinder 1. The entire process is as follows: coarse quartz sand and 5%-20% dilute sulfuric acid are continuously fed → cylinder 1 rotates (5-20 r / min), the rotation of cylinder 1 drives the guide plate 3 to strengthen the mixture → 40-60℃ temperature-controlled reaction → purified quartz sand is discharged. Our designed cylinder 1 is a composite structure, including a base layer 11, a transition layer 12, and a functional layer 13. The base layer is a Q235B steel cylinder with a thickness δ = 12-20 mm, and its inner surface is sandblasted to enhance bonding. The transition layer 12 is a 50 mm * 100 mm diamond-shaped steel mesh, fixed by welding at base points and interlocking to form an elastic buffer interface, serving as the elastic support and connection layer for the functional layer 13. The functional layer 13 is made of plastic to prevent crevice corrosion. Several integrally formed guide plates 3 are installed inside the cylinder 1. The guide plates 3 are segmented and spiral-shaped. Understandably, when the cylinder 1 rotates, the fluid-like solid-liquid materials inside the cylinder 1 begin to mix due to the centrifugal force generated by the rotation of the cylinder 1 and their own gravity. To improve mixing efficiency, the segmented guide plates 3, with their intermittent design, generate intermittent impacts during the material tumbling process, disrupting the laminar flow state of the materials. The guide plates 3 are multi-segmented, each with a different inclination angle. Turbulence is enhanced through the superposition of multiple levels of disturbances. The spiral guide plates, with a spiral angle of 25°-45°, are used. Too small an angle results in insufficient tangential momentum, while too large an angle increases flow resistance. The inclination angle and curved surface guide the fluid rotation, forming a spiral vortex. Furthermore, the spiral guide plates can extend the flow path of the materials, exacerbating the instability of the material flow and enhancing the intensity of turbulence. This design features strong overall corrosion resistance. The baffle plate design ensures high material mixing efficiency during cylinder rotation. The baffle plate is integrated with the cylinder to prevent the lining material from peeling off during rotation, thus extending the service life of the equipment.Meanwhile, we also installed temperature sensors and heating components inside the cylinder 1. Through thermal stress compensation design, we controlled the working temperature inside the cylinder 1 to be lower than the embrittlement, aging, and oxidation transformation temperature of the functional layer 13 and the steel mesh reinforcement adhesion technology of the transition layer. This greatly improved the peel strength of the lining interface, which is higher than the centrifugal stress generated by the operation of the rotary kiln, eliminating the shedding force and ensuring the structural integrity of the lining layer under long-term dynamic working conditions.

[0019] Specifically, there are six sets of guide plates 3, which are evenly distributed and staggered on the inner wall of the cylinder 1.

[0020] Specifically, the height of the guide plate 3 is one-sixth to one-quarter of the inner diameter of the cylinder 1, the helix angle of the guide plate 3 is 35°±5°, and the axial distance between adjacent guide plates 3 is 1 / 7 to 1 / 5 of the cylinder diameter of the cylinder 1.

[0021] like Figure 3 As shown, the cross-section of the guide plate 3 is triangular, and the upper surface of the guide plate 3 is wavy. An opening 31 is provided on the surface of the guide plate 3. Specifically, the triangular cross-section guide plate 3 provides structural stability. The wavy upper end of the guide plate 3 allows it to rotate with the cylinder 1 when the cylinder 1 is in contact with the material, periodically undulating to change the flow path of the material within the cylinder 1 and altering local velocity differences, thus promoting turbulence. The opening 31 on the surface of the guide plate 3 allows some material to pass through the opening 31 and cross-flow with the mainstream material flow, further increasing turbulence intensity and ensuring thorough mixing of the material within the cylinder 1.

[0022] like Figures 1-2 As shown, graphite sealing heads 14 are provided at both ends of the cylinder 1, and sealing lips 15 are provided on the end faces of the graphite sealing heads 14. Specifically, the graphite sealing heads 14 serve as the first seal, with a pressure adaptability range of 0-0.4MPa, and the sealing lips 15 serve as the second seal. The PTFE lip seal (temperature resistant from -50℃ to 200℃) can also serve as a double-seal gap compensation structure, which can control the leakage rate to below <0.05mL / min·m.

[0023] like Figures 1-3 As shown, the outer circumference of the cylinder 1 is provided with a support ring 4 and a toothed ring 5. The toothed ring 5 is positioned between two sets of support rings 4. The upper end of the base 2 is provided with an annular groove 21, and a roller 22 is disposed within the annular groove 21. The support ring 4 and the roller 22 are in movable contact. Specifically, the support ring 4 abuts against the roller 21. When the output end of the rotary motor (not shown in the figure) meshes with the toothed ring 5, it can drive the support ring 4 to rotate within the annular groove 21. Since the support ring 4 and the roller 22 are in movable contact, the rolling friction resistance between them is low, thereby effectively reducing the energy consumption of the rotary motor.

[0024] Specifically, the functional layer is made of low-density polyethylene and is molded and sintered onto the surface of the transition layer 12. The low-density polyethylene (PE) lining layer (18-30 mm thick) is formed using a molding and sintering process and has a density ≥0.945 g / cm³. 3 Shore hardness D60-65.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A plastic-lined steel rotary wet purification apparatus, characterized by: The application relates to a cylinder and a base, the cylinder is movably arranged on the base horizontally, the cylinder comprises a base layer, a transition layer and a functional layer from outside to inside, the base layer is made of steel, the transition layer is a rhombic steel net fixedly welded on the inner side of the base layer, the functional layer covers the surface of the transition layer, a flow guide plate is arranged in the cylinder, the flow guide plate comprises a base layer, a transition layer and a functional layer and is integrally formed with the cylinder, the flow guide plate is segmented, the flow guide plate is spirally arranged along the circumferential direction of the cylinder, and adjacent two flow guide plates are designed to be staggered.

2. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: The number of the flow guide plates is six groups, and the flow guide plates are uniformly and staggeredly arranged on the inner wall of the cylinder.

3. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: The height of the flow guide plate is 1 / 8 to 1 / 4 of the inner diameter of the cylinder.

4. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: The cross section of the flow guide plate is triangular, the upper end surface of the flow guide plate is wavy, and the plate surface of the flow guide plate is provided with an opening.

5. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: Graphite sealing heads are arranged at the two ends of the cylinder, and the end surface of the graphite sealing head is provided with a sealing lip.

6. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: Support rings and tooth rings are arranged on the outer periphery of the cylinder, the tooth ring is arranged between two groups of support rings, a ring groove is arranged on the upper end of the base, rollers are arranged in the ring groove, and the support rings and the rollers movably abut.

7. A plastic lined steel rotary wet cleaning apparatus as claimed in claim 1 wherein: The functional layer is made of low-density polyethylene and is sintered on the surface of the transition layer through mould pressing.

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