CN210220423U - Conveying and drying device for waste silicon mud granulation molding silicon particles - Google Patents

Abstract

The utility model discloses a conveying, drying device of useless silicon mud granulation shaping silicon granule belongs to transportation, the dry technical field of solid shaping material. The utility model discloses effectively make up to various transfer apparatus, utilize mechanical equipment such as belt feeder, roller conveyer, line hoist, hydraulic tractor, combine material loading district, drying area, the district of unloading organically, equipment source is extensive, design compactness is reasonable, and the maneuverability is strong in succession, simple structure, convenient to use, safe and reliable, greatly reduced the cost of artifical transport, improved production efficiency.

Description

Conveying and drying device for waste silicon mud granulation molding silicon particles

Technical Field

The utility model relates to a conveying, the dry technical field of solid material, transportation, the drying device of fashioned silicon granule of concretely relates to buddha's warrior attendant wire-electrode cutting waste silicon mud granulation.

Background

Drying techniques for solid materials are widely used in numerous industrial processes. The traditional drying method is the simplest and most convenient and economical material drying method, but requires a wide field, is slow in drying speed, long in time consumption, low in working efficiency, influenced by various factors such as weather and the like, and therefore, is difficult to apply to the industrial field. In the solar photovoltaic industry, a large amount of cut silicon powder is generated during silicon wafer cutting (monocrystalline silicon and polycrystalline silicon), and with the popularization of diamond wire cutting technology, waste silicon sludge mixed with a large amount of water, a large amount of silicon powder and a small amount of impurities is formed during silicon wafer cutting. Because the value of the silicon powder is high (the market price is 8-10 ten thousand yuan/ton), the particles are fine (the average particle size is less than 2.5 micrometers), and the silicon powder is piled up and placed, so that not only can the resource waste be caused, but also the environment is greatly polluted, and the silicon powder is a waste to be subjected to resource treatment. In order to facilitate resource regeneration of cutting silicon powder in the waste silicon sludge, the waste silicon sludge needs to be dried and formed, so that transportation, feeding and the like in the regeneration process are facilitated. In order to improve the added value of the waste silicon sludge regeneration product and reduce the treatment cost of the waste silicon sludge, the improvement of the treatment efficiency is the main target of related enterprises, and the development of advanced, efficient and energy-saving waste silicon sludge drying technology and process has important significance.

At present, domestic solid materials are dried by a plurality of methods, such as microwave drying, flash evaporation drying, airflow drying and the like. The microwave drying method has high energy utilization rate and uniform material drying, but can crush the granulated silicon particles to greatly reduce the balling rate (only about 15 percent), and is not beneficial to subsequent material transportation and resource regeneration. Flash drying is mainly used for powder drying, and the required temperature is high, so that the powder is deteriorated due to high-temperature silicon oxide powder. The air flow type drying (vibration fluidized bed and spray dryer) is to suspend solid particles in a heating medium for drying, so that silicon dust is easy to generate, and the dust concentration is extremely high to cause explosion.

Traditional material transfer mostly adopts the mode of artifical transport, and speed is slow, inefficiency, personnel intensity of labour are great, and the manufacturing cost of enterprise is high. In order to overcome the above problems, it is necessary to adopt a conveying mode mainly using mechanical equipment and secondarily using manpower. Common conveying equipment is provided with rollers, belts, chain conveying equipment, traveling cranes, hydraulic tractors and the like. These conveyer is easy and simple to handle, operates steadily, and the security performance is high, and this provides equipment guarantee for the material carries out convenient, safe, quick transportation. In order to realize the efficient conveying of materials in the processes of granulation, drying and the like, the reasonable design is needed, and various conveying devices are effectively combined to improve the production efficiency.

Disclosure of Invention

An object of the utility model is to overcome the shortcoming among the prior art, provide conveying, the drying device of the silicon granule that waste silicon mud granulation shaping obtained, realize convenient, safe, the high-efficient conveying of material, improve production efficiency.

In order to achieve the above purpose, the present invention specifically adopts the following technical scheme:

a conveying and drying device for silicon particles formed by granulating waste silicon sludge is characterized by comprising a belt conveyor, a buffer plate, a material tray, a conveying belt, a loading traveling crane, an unloading traveling crane, a material frame, a ground guide rail, a hydraulic tractor, a drying room and an overturning type blanking device; the belt conveyor is obliquely installed upwards; the buffer plate is obliquely and downwards arranged between the belt conveyor and the conveyor belt; a feeding pit groove is formed between the conveyor belt and the ground guide rail, and the feeding travelling crane is installed above the feeding pit groove; the hydraulic tractor is arranged on a ground guide rail, the ground guide rail penetrates through the drying room and extends to the unloading pit slot, and the unloading travelling crane is arranged above the unloading pit slot; the feeding pit groove and the discharging pit groove are used for placing a material rack; the material rack is used for placing material trays in a layered mode; the inclined covering type blanking device is arranged behind the discharging pit slot.

Preferably, one side of the drying room is provided with a heat exchange device, the other side of the drying room is provided with a fan, and the top of the drying room is provided with a moisture exhaust port.

Preferably, the four corners of the bottom of the material tray are respectively provided with a bearing, and the four corners of the top of the material tray are respectively provided with an inverted U-shaped gripper.

Preferably, four corners of the bottom of the material rack are respectively provided with a track wheel.

Preferably, the inclined covering type blanking device is a hydraulic overturning platform.

The utility model has the advantages that:

(1) the utility model discloses effectively make up to various transfer apparatus, utilize mechanical equipment such as belt feeder, roller conveyer, line hoist, hydraulic tractor, combine material loading district, drying area, the district of unloading organically, equipment source is extensive, design compactness is reasonable, and the maneuverability is strong in succession, simple structure, convenient to use, safe and reliable, greatly reduced the cost of artifical transport, improved production efficiency.

(2) The utility model discloses set up the bearing bottom the material dish, set up equipment such as rail wheel and come supplementary transfer material dish and material frame bottom the material frame, saved manpower consumption and energy resource consumption.

(3) The utility model discloses at material dish top four corners welding type of falling U tongs, not only made things convenient for the empty dish to transport and unload, can also effectively strengthen the whole rigidity intensity of material dish (whole weight is up to 80~100 kg behind the silicon granule is adorned to the material dish).

(4) The utility model discloses utilize the baking house to carry out static drying and drying, the high wet waste gas of simultaneous discharge has improved the balling-up rate of dry back silicon granule, has reduced the production volume of dust in the drying process.

Drawings

FIG. 1 is a diagram of an equipment installation arrangement;

FIG. 2 is a schematic view of the arrangement of racks in a drying room;

FIG. 3 is a flow chart of the present invention;

fig. 4 is a view of a damper plate with a damper spring according to the present invention.

Detailed Description

The present invention is further illustrated by the following specific examples.

Example 1

As shown in fig. 1, a conveying and drying device for silicon particles formed by granulating waste silicon sludge comprises a belt conveyor 1, a buffer plate 2, a material tray 3, a conveyor belt 4, a feeding crane 5, a discharging crane 6, a material rack 7, a ground guide rail 8, a hydraulic tractor 9, a drying room 10 and an overturning type blanking device 11. Wherein the belt conveyor 1 is obliquely installed upwards, and the buffer plate 2 is obliquely installed downwards between the belt conveyor 1 and the conveyor belt 3. A feeding pit groove 12 is arranged between the conveyor belt 3 and the ground guide rail 8, and the feeding traveling crane 5 is arranged above the feeding pit groove 12. The hydraulic tractor 9 is mounted on a ground rail 8, the ground rail 8 extending through the drying room 10 to a dump pit chute 13. The discharging traveling crane 6 is arranged above the discharging pit slot 13, and the overturning type discharging device 11 is arranged behind the discharging pit slot 13 (along the conveying direction of the discharging traveling crane).

The utility model discloses a conveying, drying device of useless silicon mud granulation shaping silicon granule mainly includes collection device, conveyer, heating and drying device.

1. A collecting device: the utility model relates to a collection device comprises a material tray which is used for storing silicon particles after granulation and forming and has the required size of 1 multiplied by 0.1 m (length, width and height). In order to facilitate the transportation and subsequent unloading of the material tray, four bearings (with the outer diameter of 3-5 cm) are arranged at four corners of the bottom of the material tray and used for transferring the material tray, so that the labor consumption and the energy consumption are saved. The four corners of the top of the material tray are welded with inverted U-shaped grippers, so that the empty tray can be conveniently transported and unloaded, and the overall rigidity strength of the material tray is effectively enhanced. In order to avoid the phenomenon of local accumulation of materials in the collection process, silicon particles in the material tray are arranged into a regular double-layer staggered form by utilizing manual auxiliary sorting and stacked, so that the porosity among the silicon particles can be increased, and the drying efficiency is greatly improved. The collecting device also comprises a material rack for bearing a material tray, and the size of the material rack is 1.2 multiplied by 2 m (length, width and height). The material tray is put in the material frame layering, and the number of piles is 8~10 layers, when reducing the heating and drying device area, has increased the heat utilization efficiency. In order to facilitate transportation on the ground guide rail, four corners of the bottom of the material rack are respectively provided with a rail wheel.

2. A conveying device: a. the belt conveyor is used for conveying the granulated silicon particles to the material tray, is obliquely and upwards installed at an included angle of 20 degrees with the ground, and has a length of 1.3-1.5 m; meanwhile, a rubber buffer plate with a damping spring is selected as a discharging connecting piece at the tail end of the belt conveyor. b. The stainless steel roller conveyor for placing the material tray has the size of 6 multiplied by 1.2 multiplied by 1 m (length, width and height). c. And the maximum load capacity of the travelling crane is 5T. d. The rated traction of the ground guide rail and the hydraulic tractor is not less than 15 KN. e. The overturning type blanking device adopts a hydraulic overturning platform, the size of the overturning platform is 1.2 multiplied by 1 m (length, width and height), and the overturning angle is 0-70 degrees.

3. A heating and drying device: the heating and drying device adopts a sealed drying room which can contain 20 material racks at one time, the size of the drying room is 12 multiplied by 3 multiplied by 2.5 m (length, width and height), and the material racks are arranged in parallel in two rows in the drying room, so that the drying space of the drying room is fully utilized and the heat utilization efficiency is increased. The bottom of the drying room is insulated by using an inorganic thermal mortar material with the thickness of a concrete thermal insulation layer being more than or equal to 12 cm, hollow stainless steel plates with the intervals of 10-15 cm are selected as the materials at the periphery and the top of the drying room, and the thermal insulation material filled in the drying room can be rock wool plates, expanded perlite and foamed cement. One side of the drying room is provided with a heat exchange device 10-1 which can use an electric, steam and natural gas hot blast stove as a heat source. The outer side of the heating and drying device is provided with a temperature controller for regulating and controlling the air quantity and the air speed of the fan 10-2 so as to ensure the working temperature required by the drying of the solid materials. In addition, the top of the drying room is provided with 7 pressure relief (moisture removal) ports 10-3 with the diameter of 20 cm, so that the relative humidity inside the drying device can be maintained.

4. Loading and unloading pit slot: set up respectively in material loading district and the district of unloading, mainly used places the material frame, hangs through the line of pit slot top and goes up and down, removes the material frame, makes material loading, unload more convenient. The size of the pit groove is 1.5 multiplied by 1 m (length, width and depth), the periphery of the pit groove is provided with an open-close type metal protection bracket with the height of 1 m, so that accidents such as shaking and even overturning of the material frame in the moving process are prevented.

Utilize the utility model discloses the device realizes that silicon granule conveying, dry flow are as shown in fig. 3, mainly including going into set, putting on shelf, drying, unloading, bagging-off step, specifically as follows:

the method comprises the following steps: go into dish

The silicon particles (the diameter of 3-5 cm) after granulation forming are conveyed to the height of 1.1-1.2 m above the ground in batches through a belt conveyor, and then slide to an empty material tray placed on a conveyor and used for receiving the silicon particles through a buffer plate.

Step two: upper frame

The silicon particles in the material tray are stacked in a double-layer staggered manner with the assistance of manpower (the stacking density is 0.7-0.8 g/cm)³. ) And the stacked material trays are conveyed by a stainless steel roller conveyor. The tail end of the conveyor is provided with a feeding pit groove, the height of a material rack in the feeding pit groove is adjusted through lifting of a feeding crane, and a material tray with the total weight of 80-100 kg on the roller conveyor is transferred into different material layers of the material rack through manual assistance. The material shelf is placed in advance in a groove pit with the size of 1.5 multiplied by 1 m (length, width and depth). And the material rack with full material trays is transferred onto a ground guide rail by a traveling crane, and then is pulled into a drying room linearly at a constant speed by a rail hydraulic tractor for drying.

Step three: drying

Referring to fig. 2, the material racks are arranged in parallel in two rows in the sealed drying room for static drying, and 20 material racks can be accommodated at one time. The temperature of the high-temperature hot air flow of the drying room is 80-130 ℃, the drying time is 12-18 h, and the intermittent dehumidification treatment is carried out every 3-6 minutes.

The static drying is carried out by utilizing a breeze internal circulation mode, and the drying device has the characteristics of stable materials, uniform drying and good drying effect. The drying principle of static drying is that fresh air is conveyed from an air inlet at one side of the device by a fan, then airflow is subjected to heat exchange from a high-temperature heat source at the top of the device to the other side to form hot air, after the temperature of the airflow reaches the temperature required by material drying, hot airflow flows through each material tray to contact with the material in the material trays under the action of a guide plate arranged at the inner side of a drying room, and moisture in the material is removed in a heat exchange and convection heat exchange mode. The waste moisture generated in the drying process is discharged from a moisture discharging port at the top of the drying device, and the relative humidity in the drying room is maintained by continuously supplementing fresh air and intermittently discharging high-humidity waste air. The biggest characteristic of the whole hot air circulation process is that the variable frequency fan is utilized to adjust the air quantity and the air speed, and the raised dust is controlled to the greatest extent while the drying effect is ensured.

Step four: discharging and bagging

After the drying is completed, the material frames are pulled out from the drying room one by one through the hydraulic tractor for unloading, the material frames are transferred into an unloading pit slot by utilizing an unloading crane, the height of the material frames is adjusted in a lifting mode, each layer of material disc is sequentially transferred onto the overturning type unloading device through manual assistance, and dried silicon particles are poured into a ton bag.

The waste silicon mud is a viscous material which is produced by carrying out plate-frame filter pressing on a solid waste containing high-purity silicon powder and is generated by cutting a silicon wafer (monocrystalline silicon and polycrystalline silicon) by a diamond wire in the photovoltaic industry, and the water content of the viscous material is 40-45%.

Above-mentioned embodiment in the equipment such as baking house, material frame, material dish, belt feeder, conveyer, pot hole groove and the overall dimension parameter of device can carry out the adaptability adjustment according to concrete production application, it is right not as the utility model discloses technical scheme's restriction.

Claims (5)

1. A conveying and drying device for silicon particles formed by granulating waste silicon sludge is characterized by comprising a belt conveyor, a buffer plate, a material tray, a conveying belt, a loading traveling crane, an unloading traveling crane, a material frame, a ground guide rail, a hydraulic tractor, a drying room and an overturning type blanking device; the belt conveyor is obliquely installed upwards; the buffer plate is obliquely and downwards arranged between the belt conveyor and the conveyor belt; a feeding pit groove is formed between the conveyor belt and the ground guide rail, and the feeding travelling crane is installed above the feeding pit groove; the hydraulic tractor is arranged on a ground guide rail, the ground guide rail penetrates through the drying room and extends to the unloading pit slot, and the unloading travelling crane is arranged above the unloading pit slot; the feeding pit groove and the discharging pit groove are used for placing a material rack; the material rack is used for placing material trays in a layered mode; the inclined covering type blanking device is arranged behind the discharging pit slot.

2. The conveying and drying apparatus as claimed in claim 1, wherein the drying room is provided with a heat exchanger on one side, a blower on the other side, and a moisture exhaust port on the top.

3. The conveying and drying apparatus as claimed in claim 1, wherein the material tray is provided with bearings at four corners of the bottom thereof, and inverted U-shaped grippers at four corners of the top thereof.

4. The conveying and drying apparatus as claimed in claim 1, wherein the four corners of the bottom of the material shelf are respectively provided with a track wheel.

5. The conveying and drying apparatus of claim 1 wherein said inclined feed means is a hydraulic inversion table.

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