Vacuumizing device and polycrystalline silicon coral material water quenching crushing system

Abstract

The utility model discloses a vacuumizing device and a polycrystalline silicon coral material water-quenching crushing system, relates to the technical field of polycrystalline silicon production, and mainly aims to remove water residues in a water-quenched polycrystalline silicon coral material and ensure the quality of a polycrystalline silicon packaged finished product. According to the main technical scheme, the vacuumizing device comprises a supporting frame and a lifting mechanism; a closed cavity is installed on the upper portion of the supporting frame, the upper end of the closed cavity is connected to a vacuum pump, an opening is formed in the lower end of the closed cavity, and the supporting frame below the closed cavity is fixedly connected to a bearing platform. The lifting mechanism comprises a driving gear, a rack and a sealing plate, the driving gear is rotationally connected to the bearing platform, the rack is slidably connected to the bearing platform through a guide rail, the driving gear is meshed with the rack, the upper end of the rack is fixedly connected to the sealing plate, the upper surface of the sealing plate is fixedly connected to the limiting groove and used for containing coral charge bars, and the sealing plate is matched with the opening.

Description

TECHNICAL FIELD

[0001] The utility model relates to polycrystal silicon production technical field especially relates to a kind of vacuumizing device and polycrystal silicon coral material water quenching crushing system. BACKGROUND

[0002] Polycrystal silicon is the basic raw material of solar cell and integrated circuit, and the production of polycrystal silicon mainly uses the improved Siemens process production method. The final product of this production method is rod-shaped polycrystal silicon deposited from the reduction furnace. However, according to actual needs, rod-shaped polycrystal silicon is usually broken into block polycrystal silicon. Previously, rod-shaped polycrystal silicon was mostly broken by manual method. With the rapid increase of polycrystal silicon production capacity, not only does it lead to excessive allocation of crushing and packaging personnel and increase of crushing cost, but also it makes it difficult to guarantee the product quality of polycrystal silicon, and often introduces unknown impurities into high-purity polycrystal silicon products, which reduces the product quality of polycrystal silicon.

[0003] At present, the process method of silicon material crushing has developed from the previous manual crushing, jaw crushing and roller crushing to the present water quenching crushing.

[0004] However, there is also a kind of coral material for silicon material, that is, the silicon rod itself has internal looseness and large cracks in the production process, which easily penetrates a large amount of pure water, making it difficult to volatilize the water, resulting in a large amount of water vapor in the product during packaging, affecting the product quality, or the silicon material cannot be packaged due to high temperature. SUMMARY

[0005] Therefore, the utility model provides a kind of vacuumizing device and polycrystal silicon coral material water quenching crushing system, and the main purpose is to remove the water residue in water-quenched polycrystal silicon coral material and ensure the quality of polycrystal silicon packaging products.

[0006] To achieve the above-mentioned purpose, the utility model mainly provides the following technical scheme:

[0007] On the one hand, the utility model provides a kind of polycrystal silicon coral material water quenching crushing method, which includes the following steps:

[0008] Step one, heat the coral material rod to 400-450℃;

[0009] Step two, immerse the heated coral material rod in pure water for rapid cooling, and control the water outlet temperature of the coral material rod to 100-120℃;

[0010] Step three, place the rapidly cooled coral material rod in a sealed chamber, and vacuumize the sealed chamber;

[0011] Step four, mechanically crush, screen and package the vacuumized coral material rod.

[0012] The purposes and technical problems of the utility model can be further realized by the following technical measures.

[0013] Optionally, in the step one, the coral rod needs 30-35 minutes from preheating to completing heating.

[0014] Optionally, in the step two, the coral rod is rapidly cooled in pure water below 20 DEG C, and the cooling time is 10-15 seconds.

[0015] Optionally, in the step three, the vacuum degree of the closed chamber reaches 90-100 Pa by vacuumizing the closed chamber for 18-23 seconds.

[0016] Optionally, in the step four, the surface temperature of the coral rod is controlled to be 60-70 DEG C when the coral rod is crushed.

[0017] Optionally, in the step four, the packaging temperature of the coral rod is controlled to be less than 40 DEG C.

[0018] On the other hand, the utility model also provides a kind of vacuumizing device, and the device includes: support frame and lifting mechanism;

[0019] The upper portion of the support frame is provided with a closed chamber, the upper end of the closed chamber is connected to a vacuum pump, and the lower end of the closed chamber is provided with an opening.

[0020] The lifting mechanism includes a drive gear, a rack and a sealing plate, the drive gear is rotatably connected to the bearing platform, the rack is slidably connected to the bearing platform via a guide rail, the drive gear is engaged with the rack, the upper end of the rack is fixedly connected to the sealing plate, the upper surface of the sealing plate is fixedly connected to a limiting groove body for placing the coral rod, and the sealing plate is fitted to the opening.

[0021] Optionally, two guide rods are further included, the two guide rods are respectively arranged on the two sides of the rack, the upper end of the guide rod is fixedly connected to the sealing plate, and the guide rod is slidably connected to the bearing platform.

[0022] Optionally, the groove wall of the limiting groove body is uniformly provided with a plurality of through holes.

[0023] On the other hand, the utility model also provides a kind of polysilicon coral material water quenching and crushing system, and the system includes: a heating device, a water cooling device, the aforementioned vacuumizing device and a crushing and packaging device arranged in sequence.

[0024] By the above technical solution, the utility model at least has the following advantages:

[0025] The application file with the application number CN116673108A mentions that when the polycrystalline silicon rod is heated, it is heated to 500-800 DEG C and kept for 10-20 min, but the polycrystalline silicon rod temperature is heated too high, there is a risk of sparking, and the subsequent cooling time is too long, and the production capacity is low; and in the present application, the coral material rod heating temperature is 400-450 DEG C, and the subsequent cooling time is relatively short, avoiding low production capacity.

[0026] The coral material rod is relatively loose in internal structure, and has many internal cracks, so that the internal moisture cannot be volatilized under the ordinary water quenching process, resulting in that there is much moisture in the finished product package in the packaging process, which is unacceptable for downstream customers, and the coral material processing process successfully solves the water vapor problem.

[0027] The coral material processing process replaces the original single crusher breaking form of the coral material with the forms of water quenching, vacuumizing and crushing, and the proportion of valueless powder is reduced by 2-4% points from the original basis, greatly reducing the loss in the production process and the production cost.

[0028] The coral material processing process quickly extracts the water vapor in the loose part of the coral material through the form of vacuumizing, and the silicon material temperature quickly decreases, the whole cycle process is controlled within 60-65 s, ensuring that the production capacity of the coral material in the automatic packaging process is not less than 2.5 tons / hour, and ensuring the normal production capacity task. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A step schematic diagram of a polycrystalline silicon coral material water quenching and crushing method is provided for the embodiment of the utility model;

[0030] Figure 2 A structure schematic diagram of a polycrystalline silicon coral material water quenching and crushing system is provided for the embodiment of the utility model;

[0031] Figure 3 A structure schematic diagram of a vacuumizing device is provided for the embodiment of the utility model;

[0032] Figure 4 For Figure 3 An enlarged view of part A.

[0033] The reference signs in the drawings of the specification include: support frame 1, closed chamber 2, opening 3, bearing platform 4, rack 5, sealing plate 6, guide rail 7, limiting groove body 8, coral material rod 9, stepping motor 10, guide rod 11, through hole 12, feeding section 13, heating furnace 14, water cooling device 15, mechanical hand 16, vacuum pipe 17. DETAILED DESCRIPTION

[0034] For further elaboration of the utility model for achieving the predetermined technical means and effects of the utility model purposes, the following combined with the drawings and preferred embodiments, according to the specific implementation of the utility model application, structure, features and its effects, detailed description as follows. In the following description, different "an embodiment" or "embodiments" refers to the same embodiment. In addition, one or more embodiments of the specific features, structure or characteristics can be combined by any suitable form.

[0035] The utility model will be further explained in detail in connection with the drawings and embodiments.

[0036] As Figure 1 The utility model discloses a kind of polycrystalline silicon coral material water quenching crushing methods, which includes the following steps:

[0037] Step one, coral material stick 9 is heated to 400-450 ℃;

[0038] Step two, coral material stick 9 after heating is immersed in pure water and quenched, and the water temperature of coral material stick 9 is controlled to 100-120 ℃;

[0039] Step three, coral material stick 9 after quenching is placed in airtight chamber 2, and the airtight chamber 2 is vacuumized;

[0040] Step four, coral material stick 9 after vacuumizing is mechanically crushed, screened and packaged.

[0041] In the specific embodiment, in the step one, coral material stick 9 needs 30-35 min from preheating to complete heating.

[0042] In the specific embodiment, in the step two, it is quenched in pure water below 20 ℃, and the cooling time is 10-15 s.

[0043] In the specific embodiment, in the step three, the airtight chamber 2 is vacuumized for 18-23 s, so that the vacuum degree of the airtight chamber 2 reaches 90-100 Pa.

[0044] In the specific embodiment, in the step four, when coral material stick 9 is crushed, the surface temperature of coral material stick 9 is controlled to 60-70 ℃.

[0045] In the specific embodiment, in the step four, the packaging temperature of coral material is controlled to be less than 40 ℃.

[0046] Specifically, the coral material stick 9 is heated to 400-450 DEG C first, then quenched by pure water to 100-120 DEG C, and then vacuumized in the closed chamber 2, the air pressure in the closed chamber 2 is continuously less than the standard atmospheric pressure, and the water in the cracks of the coral material in the closed chamber 2 is continuously above the boiling point, so that the water in the cracks can be quickly vaporized and extracted, and the time required for the above process is not long, and the product quality and production efficiency of the coral material are considered.

[0047] Moreover, with the heat absorption of water vaporization, the temperature of the coral material stick 9 can be quickly reduced, and when the coral material stick 9 is broken, its temperature is naturally reduced to 60-70 DEG C.

[0048] Specifically, by controlling the heating temperature of the coral material in the water quenching process, the problem of too much water content in the process of water quenching and breaking the coral material is solved by vacuumizing, and the temperature control of the method makes the cooling rate of the coral material meet the production capacity requirement of the finished product.

[0049] As shown in Figure 2 , Figure 3 and Figure 4 , in another aspect, another embodiment of the utility model further provides a vacuumizing device, which comprises a support frame 1 and a lifting mechanism.

[0050] The upper part of the support frame 1 is provided with a closed chamber 2, the upper end of the closed chamber 2 is connected to a vacuum pump, and the lower end of the closed chamber 2 is provided with an opening 3, and the support frame 1 below the closed chamber 2 is fixedly connected to a bearing platform 4.

[0051] The lifting mechanism comprises a drive gear, a rack 5 and a sealing plate 6, the drive gear is rotatably connected to the bearing platform 4, the rack 5 is slidably connected to the bearing platform 4 through a guide rail 7, the drive gear is engaged with the rack 5, the upper end of the rack 5 is fixedly connected to the sealing plate 6, the upper surface of the sealing plate 6 is fixedly connected to a limiting groove body 8 for placing a coral material stick 9, and the sealing plate 6 is fitted with the opening 3.

[0052] In the embodiment, specifically, after the pure water quenching of the coral material stick 9 is completed, the mechanical hand 16 grabs the coral material stick 9 into the limiting groove body 8, then the drive gear is started in the forward direction, the drive gear drives the rack 5 to rise, the rack 5 drives the sealing plate 6 to rise, the sealing plate 6 is butt-jointed with the opening 3, so that the lower end opening 3 of the closed chamber 2 is sealed, at this time, the vacuum pump is started to extract the air in the closed chamber 2, so that the water in the cracks of the coral material stick 9 is quickly vaporized and extracted from the closed chamber 2.

[0053] After the vacuum pump is started for about 20s, the driving gear is started reversely, the rack 5 drives the sealing plate 6 to fall to the bearing platform 4, and the manipulator 16 moves the coral material rod to the subsequent crushing process.

[0054] Specifically, the step motor 10 is fixedly installed on the bearing platform 4, and the output shaft of the step motor 10 is coaxially connected to the driving gear.

[0055] Specifically, the guide rail 7 is fixedly connected to the bearing platform 4, and the rack 5 is slidingly connected to the guide rail 7.

[0056] Specifically, the upper end of the closed chamber 2 is connected to the vacuum pump through the vacuum pipe 17.

[0057] In the specific embodiment, two guide rods 11 are arranged on the two sides of the rack 5, the upper end of the guide rod 11 is fixedly connected to the sealing plate 6, and the guide rod 11 is slidingly connected to the bearing platform 4.

[0058] In the specific embodiment, two guide sleeves are fixedly connected to the bearing platform 4, and each guide rod 11 is slidingly connected to one of the guide sleeves.

[0059] In the process of lifting and lowering the sealing plate 6 by the rack 5, the two guide rods 11 are also lifted and lowered, so that the horizontal rotation of the sealing plate 6 is avoided, and the horizontal stability of the sealing plate 6 is improved.

[0060] In the specific embodiment, the groove wall of the limiting groove body 8 is uniformly provided with a plurality of through holes 12.

[0061] In the specific embodiment, the sealing plate 6 is connected to the opening 3 at the lower end of the closed chamber 2, and when the vacuum pump extracts air in the closed chamber 2, the water vapor in the cracks on the lower surface of the coral material rod 9 can be volatilized through the plurality of through holes 12, so that the part of the water vapor is prevented from being blocked in the cracks of the coral material rod 9, and the integrity of the water vapor removal of the coral material rod 9 is ensured.

[0062] As shown in Figure 2 In another aspect, another embodiment of the utility model also provides a polycrystalline silicon coral material water quenching and crushing system, which comprises a heating device, a water cooling device 15, the aforementioned vacuum extraction device and a crushing and packaging device arranged in sequence.

[0063] In the specific embodiment, the heating device comprises a feeding section 13 and a heating furnace 14 for heating the coral material rod 9, the heating furnace 14 is provided with a gas collecting hood, and the inside of the heating furnace 14 comprises a feeding end, an oxygen removal section, a heating section and a discharging end arranged in sequence.

[0064] The water cooling device 15 comprises a water tank and a spray head, and performs water cooling and spraying on the coral material rod 9;

[0065] The crushing and packaging device comprises a pulse crusher, a screening mechanism and a metering and bagging mechanism;

[0066] The inner surface of the pulse crusher is coated with tungsten carbide alloy, so that metal and impurities are avoided from mixing into the silicon material;

[0067] The metering and bagging mechanism comprises a coarse metering unit, a bag sleeving unit, a shaping metering unit, a heat sealing unit, a secondary bag sleeving and sealing unit, a label sticking and shaping unit, a gold detector and a re-counting and removing unit arranged in sequence.

[0068] Specifically, the coral material rod 9 is heated to 400-450 DEG C, and then quenched, and the water is vaporized by vacuumization, and the temperature is lowered, and the pulse crushing, screening and packaging are performed in sequence, and the water quenching to the feeding time of the crusher is controlled within 60-65s, so that the process connection of the preceding and subsequent processes is met, the continuity of the coral material processing is ensured, and the normal automatic line packaging production capacity task is met.

[0069] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vacuuming device, characterized in that It includes: Support frame, the upper part of the support frame is installed with airtight chamber, the upper end of the airtight chamber is connected to vacuum pump, the lower end of the airtight chamber is provided with opening, the support frame below the airtight chamber is fixedly connected to bearing platform; Lifting mechanism, the lifting mechanism includes drive gear, rack and sealing plate, the drive gear is rotatably connected to the bearing platform, the rack is slidably connected to the bearing platform through guide rail, the drive gear is engaged with the rack, the upper end of the rack is fixedly connected to the sealing plate, the upper surface of the sealing plate is fixedly connected to limiting groove body, for placing coral stick, the sealing plate is fitted to the opening.

2. The vacuum device according to claim 1, wherein, It further includes two guide rods, two guide rods are arranged on the two sides of the rack respectively, the upper end of the guide rod is fixedly connected to the sealing plate, and the guide rod is slidably connected to the bearing platform.

3. The vacuum device according to claim 1, wherein, The groove wall of the limiting groove body is uniformly distributed with a plurality of through holes.

4. A polysilicon coral water quench breaking system, characterized in that, It includes: In sequence, heating device, water cooling device, the vacuum device of claim 1 and crushing packaging device.

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