Screening device

Abstract

The utility model relates to the field of environmental protection or chemical production, and discloses a screening device which comprises a transmission assembly, a screening assembly, a material collecting device and a blockage clearing system, and the transmission assembly is composed of a power assembly, a rotating shaft, a supporting rod and a fastener; the screening assembly is composed of a feeding port, an outer ring rib, a longitudinal rib, an inner ring rib and a screen. The material collecting device is composed of a fine material collecting hopper, a concentrated material collecting hopper, a coarse material collecting hopper and a sifter barrel. The unblocking system is composed of a back flushing rod and a nozzle. The screen cloth is driven to move circumferentially through rotation of the transmission assembly and the rotating shaft, materials from the feeding port are screened in a directional mode, target products of multiple conditions are obtained at a time, the production efficiency is improved, and the economic benefits are improved. Meanwhile, even if the raw material products are unqualified products, a part of qualified products can be obtained after the raw material products are refined by the device, the material circulation load can be remarkably reduced after the raw material products are refined, meanwhile, the comprehensive power consumption of unit products is reduced, and the comprehensive benefits are increased.

Description

Technical Field

[0001] This application relates to the fields of environmental protection or chemical production, and in particular to a screening device. Background Technology

[0002] The production processes of sodium metabisulfite, sodium sulfite, and sodium hydrosulfite involve raw material preparation, material separation, and material drying. The purity of the target product is significantly correlated with particle size. Taking sodium metabisulfite as an example, under normal conditions, the purity of the target product with a particle size <300 mesh is 0.5-4.2% lower than that of the target product with a particle size >185 mesh. The product standard HG / T2826-2008 specifies that the key parameter for superior grade products is a main product mass fraction ≥96.5%, and the key parameter for qualified grade products is a main product mass fraction ≥95%. The market price of superior grade products is more than 10% higher than that of qualified products. For every 0.5% increase in the purity of the target product of superior grade products, the unit price increases by another 5%-10%. Obtaining higher purity target products can significantly improve profitability. However, the vast majority of existing sodium metabisulfite production systems were built during the period of extremely high demand for sodium metabisulfite from 2006 to 2016. These projects, constructed against the backdrop of severe supply shortages, suffer from prominent problems such as inadequate process design, rudimentary equipment, and limited space. Coupled with the relatively weak technical capabilities of the production enterprises, subsequent upgrades are extremely costly. Utilizing low-cost and easy-to-operate methods to extract high-purity products from mixed products has become a necessity for the vast majority of enterprises.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0004] To address the aforementioned problems, this application provides a screening device. The screening device provided by this application adopts the following technical solution:

[0005] A screening device includes a transmission assembly, a screening assembly, a material receiving device, and a blockage clearing system. The transmission assembly consists of a power assembly, a rotating shaft, a support rod, and fasteners.

[0006] The screening assembly consists of a feed inlet, outer ring ribs, longitudinal ribs, inner ring ribs, and a screen.

[0007] The material receiving device consists of a fine material collection hopper, a concentrated material collection hopper, a coarse material collection hopper, and a screening cylinder.

[0008] The unblocking system consists of a backflush rod and a nozzle;

[0009] The power unit is connected to the rotating shaft, which spans the inside of the screening cylinder. One end of the support rod is connected to the rotating shaft, and the other end is connected to the inner ring rib, outer ring rib, longitudinal rib and screen through fasteners.

[0010] Preferably, the screen is located in the middle of the cylindrical interlayer formed by the inner ring ribs, outer ring ribs, and longitudinal ribs. The inner ring ribs and the outer ring ribs are connected by longitudinal ribs, and the length of the longitudinal rib is the distance between adjacent inner ring ribs or adjacent outer ring ribs.

[0011] Preferably, the length of the longitudinal rib is between 20 and 1000 mm.

[0012] Preferably, the screen is a porous cylindrical plate or a hollow cylinder woven from silk threads.

[0013] Preferably, the mesh size of the screen is non-uniform, with the mesh size of the screen located directly above the fine material collection hopper being between 500-100 mesh, and the mesh size of the screen located directly above the concentrate collection hopper being between 185-5 mesh.

[0014] Preferably, the support rod is composed of 3-8 identical short sections of shaped steel or round steel; further, the support rod has 2-10 sets of identical structures.

[0015] Preferably, a back-blowing rod is arranged directly above the screen, and a nozzle is arranged directly below the back-blowing rod, with the spacing between adjacent nozzles preferably between 20-300mm.

[0016] In summary, this application includes the following beneficial technical effects;

[0017] This application utilizes the rotation of the transmission assembly and shaft to drive the circumferential motion of the screen, enabling directional screening of materials from the feed inlet. This allows for the simultaneous acquisition of multiple target products, improving production efficiency and economic benefits. Furthermore, even if the raw material is substandard, this device can refine it to obtain a portion of the qualified product. Refining significantly reduces the material circulation load and lowers the overall power consumption per unit product.

[0018] Furthermore, this product can be used in multiple stages. As long as qualified raw materials are provided, high-purity target products can be extracted after multi-stage screening, increasing the efficiency per unit product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the fastener of this utility model;

[0021] Among them, 1. Power assembly; 2. Feed inlet; 3. Outer ring rib; 4. Longitudinal rib; 5. Screen; 6. Backflush rod; 7. Nozzle; 8. Rotating shaft; 9. Support rod; 10. Inner ring rib; 11A. Fine material collection hopper; 11B. Concentrated material collection hopper; 11C. Coarse material collection hopper; 12. Screening device cylinder; 13. Fasteners. Detailed Implementation

[0022] The following is combined with Figure 1-2 This application is described in further detail.

[0023] This application discloses a screening device, referring to... Figure 1 It includes a transmission assembly, a screening assembly, a receiving device, and a blockage clearing system. The transmission assembly consists of a power assembly 1, a rotating shaft 8, a support rod 9, and fasteners 13.

[0024] The screening assembly consists of a feed inlet 2, an outer ring rib 3, a longitudinal rib 4, an inner ring rib 10, and a screen 5;

[0025] The material collection device consists of a fine material collection hopper 11A, a concentrated material collection hopper 11B, a coarse material collection hopper 11C, and a screening cylinder 12.

[0026] The unclogging system consists of a backflush rod 6 and a nozzle 7;

[0027] The power unit 1 is connected to the rotating shaft 8, which spans the inside of the screen cylinder 12. One end of the support rod 9 is connected to the rotating shaft 8, and the other end is connected to the inner ring rib 10, the outer ring rib 3, the longitudinal rib 4 and the screen 5 through the fastener 13.

[0028] Reference Figure 1 The screen 5 is located in the middle of the cylindrical interlayer formed by the inner ring ribs 10, the outer ring ribs 3, and the longitudinal ribs 4. The inner ring ribs 10 and the outer ring ribs 3 are connected by the longitudinal ribs 4. The length of the longitudinal ribs 4 is the distance between adjacent inner ring ribs 10 or adjacent outer ring ribs 3.

[0029] Reference Figure 1 The length of longitudinal reinforcement 4 is between 20-1000mm.

[0030] Reference Figure 1 The screen 5 is a cylindrical perforated plate or a cylinder woven from silk threads.

[0031] Reference Figure 1 The mesh size of screen 5 is not uniform. The mesh size of screen 5 located directly above the fine material collection hopper 11A is between 500-100 mesh, and the mesh size of screen 5 located directly above the fine material collection hopper 11B is between 185-5 mesh.

[0032] The support rod 9 is composed of 3-8 identical short sections of shaped steel or round steel. Furthermore, the support rod 9 has 2-10 sets of identical structures.

[0033] A back-blowing rod 6 is arranged directly above the screen 5, and a nozzle 7 is arranged directly below the back-blowing rod 6. The spacing between adjacent nozzles 7 is preferably between 20-300mm.

[0034] This application uses the rotation of the transmission assembly 1 and the rotating shaft 8 to drive the screen 5 to move in a circular motion, thereby performing directional screening of materials from the feed inlet 2, obtaining multiple target products in one go, improving production efficiency and economic benefits.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screening device, characterized in that, It includes a transmission assembly, a screening assembly, a receiving device, and a blockage clearing system. The transmission assembly consists of a power assembly (1), a rotating shaft (8), a support rod (9), and fasteners (13). The screening assembly consists of a feed inlet (2), an outer ring rib (3), a longitudinal rib (4), an inner ring rib (10), and a screen (5); The material collection device consists of a fine material collection hopper (11A), a concentrated material collection hopper (11B), a coarse material collection hopper (11C), and a screening cylinder (12); The unblocking system consists of a backflush rod (6) and a nozzle (7); The power assembly (1) is connected to the rotating shaft (8), which spans the inside of the screen cylinder (12). One end of the support rod (9) is connected to the rotating shaft (8), and the other end is connected to the inner ring rib (10), outer ring rib (3), longitudinal rib (4) and screen (5) through fasteners (13).

2. A sieve according to claim 1, characterized in that, The screen (5) is located in the middle of the cylindrical interlayer made of inner ring ribs (10), outer ring ribs (3) and longitudinal ribs (4). The inner ring ribs (10) and the outer ring ribs (3) are connected by longitudinal ribs (4). The length of the longitudinal ribs (4) is the distance between adjacent inner ring ribs (10) or adjacent outer ring ribs (3).

3. A sieve according to claim 1, characterized in that, The length of the longitudinal reinforcement (4) is between 20-1000 mm.

4. A sieve according to claim 1, characterized in that, The screen (5) is a cylindrical perforated plate or a cylinder woven from silk threads.

5. A sieve according to claim 1, characterized in that, The mesh size of the screen (5) is not uniform. The mesh size of the screen (5) located directly above the fine material collection hopper (11A) is between 500-100 mesh, and the mesh size of the screen (5) located directly above the fine material collection hopper (11B) is between 185-5 mesh.

6. A sieve according to claim 1, characterized in that, The support rod (9) is composed of 3-8 identical short sections of shaped steel or round steel.

7. A sieve according to claim 1, characterized in that, A back-blowing rod (6) is arranged directly above the screen (5), and a nozzle (7) is arranged directly below the back-blowing rod (6). The distance between adjacent nozzles (7) is between 20-300mm.

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