Wet silicon sludge drying device utilizing waste heat of metal silicon

Abstract

The utility model relates to the technical field of wet silicon sludge drying, and provides a metal silicon waste heat utilization wet silicon sludge drying device which comprises a drying machine roller, an outer gear is arranged outside the drying machine roller, and a reduction gearbox is arranged on one side of the outer gear. And the energy consumption in the wet silicon sludge drying process is greatly reduced. Compared with a traditional drying mode, dependence on extra energy is reduced, so that the production cost is effectively reduced, the current development trend of green low-carbon manufacturing is actively responded, and contribution is made to sustainable development; through the unique spiral conveying and roller drying machine combined design, the heating uniformity of the wet silicon sludge in the drying process is remarkably improved. Wet silicon sludge is evenly spread and turned over through circular motion of the roller, drainage of internal moisture is accelerated, the problem of uneven moisture distribution in the prior art is thoroughly solved, and the drying efficiency and the drying quality are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of wet silica mud drying technology, and in particular to a device for drying wet silica mud by utilizing waste heat from metallic silicon. Background Technology

[0002] In the metallurgical and industrial silicon ingot industries, the drying process of wet silica sludge is one of the key steps in production. Before being smelted in the furnace, wet silica sludge typically needs to be dried to remove surface and internal moisture. This process is crucial for improving the quality of the wet silica sludge, ensuring smooth subsequent processing, and optimizing production efficiency.

[0003] Existing drying technologies mainly include natural drying, hot air drying, infrared drying, and electric heating. However, these traditional methods still face several challenges, especially in the drying of large-scale production or special materials, where there are obvious technical bottlenecks.

[0004] Natural air drying is simple and low-cost, but it is unsuitable for large-scale production due to its low efficiency and difficulty in removing moisture from the wet silica mud. Hot air drying can quickly heat the surface and accelerate moisture loss, but the flow and temperature control of hot air are often difficult to control precisely, potentially leading to uneven drying results, especially when the evaporation rates of moisture on the surface and inside the wet silica mud differ, resulting in uneven moisture distribution. Furthermore, hot air systems have low energy efficiency, often requiring significant energy consumption and increasing production costs. Infrared and electric heating drying require high costs for production line modifications and consume substantial amounts of electricity. Utility Model Content

[0005] The purpose of this invention is to provide a device for drying wet silica mud by utilizing the waste heat of metallic silicon. By using this device, the above-mentioned problems can be solved.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a device for drying wet silica mud by utilizing waste heat from metallic silicon, including a dryer drum, an external gear is provided on the outside of the dryer drum, a gearbox is provided on one side of the external gear, a feeder shell is provided at one end of the dryer drum, a track is provided below the dryer drum, a transport trolley is provided on the track, a slider is provided at the bottom of the transport trolley, and the slider is slidably mounted on the track.

[0007] Preferably, a screw conveyor is rotatably installed inside the feeder housing, a conveying motor is installed at the end of the feeder housing, the shaft of the conveying motor extends into the inside of the feeder housing and is fixedly connected to the end of the screw conveyor, and a feed hopper is provided at the top of the feeder housing, which is connected to the inside of the feeder housing.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] 1. This utility model provides a device for drying wet silica sludge by utilizing the waste heat of metallic silicon ingots. It uses the waste heat from high-temperature metallic silicon ingots as the main heat source, significantly reducing energy consumption during the drying process. Compared with traditional drying methods, it reduces reliance on additional energy, thereby effectively lowering production costs. This actively responds to the current trend of green and low-carbon manufacturing, contributing to sustainable development.

[0010] 2. This utility model provides a device for drying wet silica mud using waste heat from metallic silicon. Through a unique combination design of a spiral conveyor and a drum dryer, the uniformity of heating of the wet silica mud during the drying process is significantly improved. The circumferential motion of the drum causes the wet silica mud to spread and tumble evenly, accelerating the removal of internal moisture and completely solving the problem of uneven moisture distribution in traditional technologies, thus greatly improving drying efficiency and drying quality.

[0011] 3. This utility model provides a device for drying wet silica sludge using waste heat from metallic silicon. The feeder and dryer feature a simple structural design, making them easy to manufacture and maintain. Furthermore, the device offers excellent flexibility, allowing for modular modification and expansion based on actual production needs. Whether for small-scale production enterprises or large-scale factories, the device can be adjusted according to their own scale and output requirements to meet the needs of different production sizes. Attached Figure Description

[0012] Figure 1 This is a front view structural diagram of the present utility model;

[0013] Figure 2 This is a schematic diagram of the gear train structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the dryer drum structure of this utility model.

[0015] The following are the annotations in the figure: 1. Dryer drum; 2. External gear; 3. Feeder housing; 31. Screw conveyor; 32. Feeding motor; 33. Feed hopper; 4. Track; 5. Transport trolley; 6. Sliding block; 7. Gearbox. Detailed Implementation

[0016] 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.

[0017] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0018] Combination Figures 1 to 3 As shown, the present invention discloses a device for drying wet silica mud by utilizing waste heat from metal silicon, comprising a dryer drum 1, an external gear 2 on the outside of the dryer drum 1, a reduction gearbox 7 on one side of the external gear 2, a feeder housing 3 at one end of the dryer drum 1, a track 4 below the dryer drum 1, a transport trolley 5 on the track 4, and a slider 6 at the bottom of the transport trolley 5, which slides on the track 4.

[0019] Preferably, a spiral conveyor rod 31 is rotatably arranged inside the feeder housing 3, and a conveyor motor 32 is installed at the end of the feeder housing 3. The shaft of the conveyor motor 32 extends into the interior of the feeder housing 3 and is fixedly connected to the end of the spiral conveyor rod 31. A feed hopper 33 is provided at the top of the feeder housing 3 and is connected to the interior of the feeder housing 3.

[0020] Working principle:

[0021] In the production workshop, a transport trolley 5 lifts freshly cast silicon ingots, which have just transitioned from a liquid to a solid phase, onto the trolley 5. The trolley 5, driven by an internal motor, chain, or hydraulic system, transports the still-hot silicon ingots along the track 4 to a high-temperature chamber below the dryer drum 1, where they become a heat source. Depending on the type of silicon, the heat source temperature ranges from 200℃ to 1800℃.

[0022] Wet silica mud is fed into the feed hopper 33 by manual or equipment methods. Wet silica mud can be regarded as the granular form of damp sand. Silica mud is formed in the manufacturing process of solar cells. It is formed when silicon powder generated during diamond wire cutting is deposited into the cutting slurry along with other liquids. After being processed by a filter press, it is formed. Its water content is generally in the range of 25% to 60%.

[0023] The wet silica mud enters the feeder housing 3 through the feed hopper 33 under the action of gravity and the container design. The feeder housing 3 is an inclined screw conveyor with a U-shaped groove. Under the action of the screw conveyor, the wet silica mud enters the dryer drum 1. The feeding motor 32 is started to drive the screw conveyor rod 31 to rotate, so that the wet silica mud can be transported to the dryer drum 1.

[0024] The interior of the dryer drum 1 is a drum with spiral grooves and vanes, such as... Figure 3 As shown.

[0025] Driven by external gear 2, the dryer drum 1 rotates around its axis, evenly spreading and turning the internal granular wet silica mud material, ensuring uniform heating inside and out, and rapidly evaporating the moisture. Its wheel system structure is as follows: Figure 2 As shown.

[0026] The electric motor M provides the power source and is connected to the gear set through a coupling to the reducer. Depending on the actual selection requirements, the reduction gearbox 7 can be 2-stage or 3-stage, and the final speed range transmitted to the external gear 2 should be 1-10 rpm.

[0027] To enable workers to determine the heating temperature, three support bearings should be placed along the axial direction of the dryer drum 1. Simple temperature sensors or corresponding temperature feedback instruments should be installed on these supports as temperature detection devices. This information will be used for actual production judgment.

[0028] By utilizing the high temperature of metallic silicon ingots as a heat source, an efficient method for heat recovery and utilization is introduced into the traditional drying process, reducing energy consumption. At the same time, the combined design of spiral conveying and drum drying achieves uniform and rapid drying of wet silica mud.

[0029] The provided industrial process is applicable to metallurgy, waste heat recovery from silicon ingots, and other industries requiring the drying of wet silica sludge or similar granular materials, particularly in the manufacture of high-purity silicon from photovoltaic regenerated silicon, demonstrating broad application potential. It not only saves energy and reduces emissions, improving production efficiency and product quality, but also significantly reduces reliance on traditional energy sources, providing technological support for achieving sustainable development.

[0030] This technology combines heat recovery with high-efficiency drying, providing a novel solution for drying wet silica sludge. Its high efficiency, energy saving, low carbon footprint, and environmental friendliness will bring significant economic and social benefits to the optimization of related industrial processes.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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.

[0032] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for drying wet silica mud by utilizing waste heat from metallic silicon, comprising a dryer drum (1), characterized in that: An external gear (2) is provided on the outside of the dryer drum (1), a gearbox (7) is provided on one side of the external gear (2), a feeder housing (3) is provided at one end of the dryer drum (1), a track (4) is provided below the dryer drum (1), a transport trolley (5) is provided on the track (4), a slider (6) is provided at the bottom of the transport trolley (5), and the slider (6) is slidably set on the track (4).

2. The device for drying wet silica mud by utilizing waste heat from metallic silicon according to claim 1, characterized in that: The feeder housing (3) is equipped with a rotating screw conveyor (31) inside. A conveyor motor (32) is installed at the end of the feeder housing (3). The shaft of the conveyor motor (32) extends into the interior of the feeder housing (3) and is fixedly connected to the end of the screw conveyor (31). A feed hopper (33) is provided at the top of the feeder housing (3). The feed hopper (33) is connected to the interior of the feeder housing (3).

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