Efficient and environment-friendly integrated sand making building

Abstract

The utility model provides an efficient and environment-friendly integrated sand making building. The sand making building comprises a sand making device, a high-frequency screen, a wet mixing machine, a fine sand recoverer and a dust collecting system. Wherein the sand making device is composed of a roll crusher and a vertical shaft crusher, materials sequentially enter a hoister, a material guide pipe and a high-frequency screen for classification through a feeding belt, oversize materials return to the sand making device for closed-circuit crushing, undersize materials are sorted into fine sand and finished sand through the winnowing device, and the fine sand is recycled after being treated through the fine sand recoverer. And the finished sand is output after being humidified by the humidifying machine. The dust collection system adopts multi-point negative pressure dust collection, and dust emission is adjusted in real time. According to the utility model, the sand gradation is optimized through the cooperation of the double hosts for crushing, the material returning energy consumption is reduced by combining closed-loop separation, efficient and environment-friendly production is realized by utilizing dynamic winnowing and dust removal, and the technical problems of high loss rate of fine sand, non-uniform gradation and dust overflow in the traditional sand making are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of sand and gravel aggregate processing equipment, and specifically relates to a highly efficient and environmentally friendly integrated sand making tower. Background Technology

[0002] Traditional sand making systems have the following shortcomings: high fine sand loss rate in the circulation path, large energy consumption for return material crushing; fluctuation in the moisture content of finished sand due to environmental humidity; and dust spillage caused by open loading.

[0003] To address the aforementioned shortcomings, this utility model provides a closed-loop sand making tower that integrates dual-host crushing and air classification. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, this utility model provides a highly efficient and environmentally friendly integrated sand making tower.

[0005] The present invention is implemented as follows: A high-efficiency and environmentally friendly integrated sand making tower includes a feeding belt, an elevator, a guide pipe, a high-frequency screen, an air classifier, a wet mixer, a fine sand collector, a sand making device, a return belt, and a dust collection system. The feeding belt is used to transport raw materials to the elevator, the elevator is used to transport raw materials to the guide pipe, the outlet of the guide pipe is connected to the inlet of the high-frequency screen, an air classifier is installed below the screen of the high-frequency screen, and the outlet of the high-frequency screen is connected to the sand making device through a pipeline. The sand making device is formed by a combination of a double-roll crusher and a vertical shaft crusher arranged in parallel. The upper outlet of the air classifier is connected to the fine sand collector through a pipeline, the fine sand collector is connected to the dust collection system, a powder silo is installed below the dust collection system, and the dust collection system is connected to a dust exhaust fan. The lower outlet of the air classifier is connected to the wet mixer, the outlet of the wet mixer is connected to the finished product belt, and the outlet of the sand making device is connected to the elevator through the return belt.

[0006] The working principle of this utility model is as follows: Sand and gravel sequentially pass through a feeding belt, elevator, and guide pipe before entering a high-frequency screen. The sand and gravel screened by the high-frequency screen enters an air classifier. Under the force of the air classifier, fine sand rises and enters a fine sand collector from the upper outlet of the air classifier. Dust-laden gas enters a dust collection system under the action of a dust exhaust fan, and dust falls into a powder silo below the dust collection system. The air, after dust removal and meeting emission standards, is then discharged. Finished sand enters a mixing and humidifying machine from the lower outlet of the air classifier. After being humidified, it is transported to the finished product silo via a finished product belt. Sand and gravel on the high-frequency screen enter a sand making device through the high-frequency screen's outlet. After being crushed by the sand making device, it is transported by a return belt to the elevator and re-enters the high-frequency screen for further screening.

[0007] Preferably, the screen of the high-frequency screen is detachable. With a detachable screen, screens with different apertures can be replaced to obtain sand and gravel of different particle sizes; for example, when fine sand smaller than 3mm is required, a screen with an aperture of 3mm is selected.

[0008] Preferably, the dust collection system is a multi-point negative pressure dust collection system.

[0009] Preferably, the dust collection system is a pulse jet bag filter.

[0010] Preferably, the high-frequency screen has three layers of mesh, with the mesh size gradually decreasing from the top to the bottom. For ease of explanation, the mesh sizes from the top to the bottom are 10mm, 5mm, and 3mm, respectively. Furthermore, the outlet of the lower screen is connected to both the sand-making device and the mixing machine via pipes, and the outlet of the lower screen is equipped with a deflector plate. This device can obtain finished sand with a particle size less than 3mm through the lower 3mm mesh. When 3-5mm sand and gravel are needed as grading material, simply deflect the deflector plate into the pipe of the sand-making device, and the 3-5mm sand and gravel can enter the mixing machine, thus mixing the fine sand (below 3mm) with the 3-5mm grading material. If only finished sand below 3mm is needed, deflect the deflector plate into the pipe connected to the mixing machine; in this case, the 3-5mm and larger sand and gravel enter the sand-making device for secondary processing through the pipe.

[0011] The present invention has the following beneficial effects: (1) The present invention combines a high-frequency screen with a secondary sand making device. Through secondary or multiple processing by the sand making device, the finished sand of a set particle size can be collected. Through the combined action of the air classifier, the high-frequency screen and the dust collection system, the finished sand, fine sand and dust can be collected separately. (2) By utilizing the synergistic effect of the roller crusher and the vertical shaft crusher, the problem of uneven sand particle size distribution caused by the single crushing method in the traditional sand making process is solved. The sand particles generated by the dual main crushers complement each other, so that the finished sand forms an ideal olive-shaped gradation structure, which greatly reduces the proportion of coarse sand and ultrafine sand, and significantly increases the proportion of medium and fine sand, thereby improving the quality and production stability of the finished sand. (3) The present invention can screen sand and gravel of different particle sizes by setting three layers of screens and setting a feeding plate at the outlet of the high-frequency screen. (4) By combining high and low sand making devices, the overall installed power can be significantly reduced and energy consumption can be saved. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a highly efficient and environmentally friendly integrated sand making tower according to this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of a high-efficiency and environmentally friendly integrated sand making tower with a material feeding plate controlling the flow of sand and gravel to the mixing machine.

[0014] Figure 3 This is a schematic diagram of the structure of a high-efficiency and environmentally friendly integrated sand making tower with a material feeding plate controlling the flow of sand and gravel.

[0015] The components include: 1. Feed belt; 2. Elevator; 3. Guide pipe; 4. High-frequency screen; 5. Air classifier; 6. Mixer; 7. Finished product belt; 8. Sand making device; 9. Fine sand collector; 10. Powder silo; 11. Dust exhaust fan; 12. Material feeding plate; 13. Dust collection system; and 14. Return belt. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-3 The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0017] like Figure 1 As shown, a high-efficiency and environmentally friendly integrated sand making tower includes a feed belt 1, an elevator 2, a guide pipe 3, a high-frequency screen 4, an air classifier 5, a wet mixer 6, a fine sand collector 9, a sand making device 8, a return belt 14, and a dust collection system 13. The feed belt 1 is used to transport raw materials to the elevator 2, the elevator 2 is used to transport raw materials to the guide pipe 3, the outlet of the guide pipe 3 is connected to the inlet of the high-frequency screen 4, the air classifier 5 is installed below the screen of the high-frequency screen 4, and the outlet of the high-frequency screen 4 is connected to the sand making unit 8 via a pipeline. The sand making device 8 is formed by a parallel arrangement of a double-roll crusher and a vertical shaft crusher; the upper outlet of the air classifier 5 is connected to the fine sand collector 9 through a pipeline, the fine sand collector 9 is connected to the dust collection system 13, a powder silo 10 is set below the dust collection system 13, and the dust collection system 13 is connected to the dust exhaust fan 11; the lower outlet of the air classifier 5 is connected to the mixing machine 6, and the outlet of the mixing machine 6 is connected to the finished product belt 7; the discharge port of the sand making device 8 is connected to the elevator 2 through the return belt 14.

[0018] The working process of this device is as follows: Sand and gravel are sequentially fed through the feed belt 1, elevator 2, and guide pipe 3 into the high-frequency screen 4. The sand and gravel screened by the high-frequency screen 4 enters the air classifier 5. Under the action of the air force in the air classifier 5, fine sand rises and enters the fine sand collector 9 from the upper outlet of the air classifier 5 for recovery. Dust-laden gas enters the dust collection system 13 under the action of the dust exhaust fan 11. The dust collected by the dust collection system 13 falls into the powder silo 10. The air after dust removal meets the standards and is then discharged. The finished sand enters the mixing and humidifying machine 6 from the lower outlet of the air classifier 5. After being mixed and humidified, it is transported to the finished product silo via the finished product belt 7. The sand and gravel on the screen of the high-frequency screen 4 enters the sand making device 8 through the discharge port of the high-frequency screen 4. After being crushed by the sand making device 8, it is transported to the elevator 2 by the return belt 14 and re-enters the high-frequency screen 4 for further screening.

[0019] Based on the above embodiments, the high-frequency screen 4 further includes a detachable screen. This detachable screen allows for the replacement of screens with different aperture sizes. When fine sand smaller than 3mm is required, a 3mm aperture screen is selected; when fine sand smaller than 5mm is required, a 5mm aperture screen is selected.

[0020] Based on the above implementation method, the dust collection system 13 is further described as a multi-point negative pressure dust collection system.

[0021] Based on the above embodiments, the dust collection system 13 is further described as a gas box pulse bag dust collector.

[0022] Based on the above embodiments, further, the high-frequency screen 4 has three layers of screen mesh, with the mesh size gradually decreasing from the top to the bottom. In this embodiment, the mesh sizes from the top to the bottom are 10mm, 5mm, and 3mm, respectively. Even further, as... Figure 2 and Figure 3 As shown, the discharge port of the lower screen is connected to the sand making device 8 and the mixing machine 6 through pipes, and the discharge port of the lower screen is equipped with a material-pulling plate 12.

[0023] like Figure 2 As shown, this device can obtain finished sand with a particle size of less than 3mm through a sieve with a lower aperture of 3mm. When 3-5mm sand and gravel are needed as grading material, simply push the feeding plate 12 towards the pipeline of the sand making device 8, and the 3-5mm sand and gravel can enter the mixing machine 6, thereby mixing the finished sand with 3-5mm grading material.

[0024] like Figure 3 As shown, if only fine sand of less than 3mm is needed, the material feeding plate 12 can be fed into the pipeline connected to the mixing machine 6. At this time, sand and gravel of 3-5mm and larger than 5mm will enter the sand making device 8 for secondary processing through the pipeline.

Claims

1. A highly efficient and environmentally friendly integrated sand making tower, characterized in that, The system includes a feed belt, an elevator, a guide pipe, a high-frequency screen, an air classifier, a wet mixer, a fine sand collector, a sand making device, a return belt, and a dust collection system. The feed belt transports raw materials to the elevator, which in turn transports them to the guide pipe. The outlet of the guide pipe is connected to the feed inlet of the high-frequency screen. An air classifier is located below the screen of the high-frequency screen, and the outlet of the high-frequency screen is connected to the sand making device via a pipeline. The sand making device is formed by a combination of a double-roll crusher and a vertical shaft impact crusher arranged in parallel. The upper outlet of the air classifier is connected to the fine sand collector via a pipeline, and the fine sand collector is connected to the dust collection system. A powder silo is located below the dust collection system, which is connected to a dust exhaust fan. The lower outlet of the air classifier is connected to the wet mixer, and the outlet of the wet mixer is connected to the finished product belt. The outlet of the sand making device is connected to the elevator via a return belt.

2. The high-efficiency and environmentally friendly integrated sand making tower according to claim 1, characterized in that, The screen of the high-frequency screen is detachable.

3. The high-efficiency and environmentally friendly integrated sand making tower according to claim 1, characterized in that, The dust collection system is a multi-point negative pressure dust collection system.

4. The high-efficiency and environmentally friendly integrated sand making tower according to claim 1, characterized in that, The dust collection system is a pulse jet bag filter.

5. The high-efficiency and environmentally friendly integrated sand making tower according to claim 1, characterized in that, The high-frequency screen has three layers of mesh, with the mesh size gradually decreasing from the top to the bottom.

6. The high-efficiency and environmentally friendly integrated sand making tower according to claim 5, characterized in that, The discharge port on one side of the bottommost screen is connected to the sand making device and the mixing machine through pipes, and the discharge port of the bottom screen is equipped with a material-pulling plate.

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