Centralized dust removal system for granular silicon production

Abstract

The utility model provides a centralized dust removal system for particle silicon production, which comprises more than two silicon powder filtering subsystems (7) for receiving silicon powder-containing gas, and each silicon powder filtering subsystem (7) is in fluid connection with a central dust removal device (8) through a silicon powder output pipeline (25); wherein the silicon powder filtering subsystem (7) comprises a silicon powder filter (1) for filtering silicon powder and a silicon powder sending device (2) for sending the silicon powder, the silicon powder filter (1) is in fluid connection with the silicon powder sending device (2), and the silicon powder sending device (2) is in fluid connection with a silicon powder output pipeline (25); the central dust removal device (8) comprises a central silicon powder filter (800) for filtering silicon powder, the central silicon powder filter (800) is provided with a silicon powder total input port (815) for receiving the silicon powder, and the silicon powder total input port (815) is in fluid connection with the silicon powder output pipeline (25).

Description

TECHNICAL FIELD

[0001] The utility model relates to a centralized dust removal system, in particular to a centralized dust removal system for granular silicon production. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] Post-processing is an important link before granular silicon product packaging and selling, and the granular silicon is packaged and sold after screening and dust removal processes. In the granular silicon dust removal production process, the current dust discharging mode is intermittent shutdown, and the silicon powder is discharged into a single silicon powder ton bag station, which is not conducive to continuous production, and the silicon powder is easy to leak during the dust discharging process, which pollutes the environment and harms the health of personnel.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model relates to a centralized dust removal system, in particular to a centralized dust removal system for granular silicon production.

[0006] In order to solve the above technical problems, the utility model discloses a centralized dust removal system for granular silicon production, comprising:

[0007] Two or more silicon powder filtering subsystems for receiving silicon powder containing gas, each silicon powder filtering subsystem is connected with the central dust removal device through a silicon powder output pipeline; wherein,

[0008] The silicon powder filtering subsystem comprises a silicon powder filter for filtering silicon powder and a silicon powder sending device for sending silicon powder, the silicon powder filter is connected with the silicon powder sending device, and the silicon powder sending device is connected with the silicon powder output pipeline;

[0009] The central dust removal device comprises a central silicon powder filter for filtering silicon powder, and a total silicon powder input port for receiving silicon powder is arranged on the central silicon powder filter, and the total silicon powder input port is connected with the silicon powder output pipeline.

[0010] Further, a silicon powder filter first bottom valve and a silicon powder filter second bottom valve are sequentially arranged at the bottom of the silicon powder filter, and are used for outputting the silicon powder filtered by the silicon powder filter;

[0011] A silicon powder input pipeline is arranged on the side of the bottom of the silicon powder filter, and is used for receiving silicon powder containing gas conveyed by an upstream system.

[0012] Further, the silicon powder sending device comprises:

[0013] A hollow silicon powder bin for storing silicon powder, the top of which is fluidly connected with the second bottom valve of the silicon powder filter;

[0014] The bottom of the silicon powder bin is provided with a powder discharging valve, which is fluidly connected with the central dust removal device through the silicon powder output pipeline.

[0015] Further, one side of the top of the silicon powder bin is provided with a nitrogen inlet valve, which is fluidly connected with the nitrogen main pipe inlet, for filling nitrogen into the silicon powder bin; the other side of the top of the silicon powder bin is provided with a remote pressure gauge, for detecting the internal pressure of the silicon powder bin.

[0016] Further, the bottom of the central silicon powder filter is sequentially provided with a central dust removal device first bottom valve and a central dust removal device second bottom valve.

[0017] The silicon powder total input port is arranged at the side of the bottom of the central silicon powder filter.

[0018] Further, the bottom of the central silicon powder filter is provided with a hollow dust collector for storing silicon powder, the top of which is fluidly connected with the central dust removal device second bottom valve, for receiving and storing silicon powder.

[0019] Further, the bottom of the dust collector is provided with a bottom valve, which is detachably connected with a ton bag through a ton bag fastening opening, and the ton bag is used for storing silicon powder.

[0020] Further, a module scale is arranged below the side of the bottom of the dust collector, for measuring the weight of the silicon powder in the dust collector.

[0021] Further, the bottom of the dust collector is further provided with a rapping device, for rapping the sidewall of the dust collector.

[0022] Further, the rapping device is electrically connected with a gas source instrument gas remote control valve.

[0023] Advantages:

[0024] 1. The utility model improves the use efficiency of the dust removal system.

[0025] 2. The utility model reduces the working strength of personnel, guarantees the safety of personnel, and eliminates dust pollution. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or other aspects of the utility model will become more apparent by describing in detail the preferred embodiments thereof with reference to the attached drawings.

[0027] Figure 1 is the system overall structure schematic diagram.

[0028] Figure 2 is the silicon powder filtering subsystem structure schematic diagram.

[0029] Figure 3 is the central dust removal device structure schematic diagram.

[0030] In the figure:

[0031] 1 is a silicon powder filter, 11 is a first bottom valve of the silicon powder filter, 12 is a second bottom valve of the silicon powder filter, and 13 is a silicon powder input pipeline;

[0032] 2 is a silicon powder sending device, 20 is a silicon powder bin, 21 is a nitrogen inlet valve of the silicon powder sending device, 22 is a powder discharge valve of the silicon powder sending device, 23 is a remote pressure gauge of the silicon powder sending device, 24 is a backflushing nitrogen inlet of the silicon powder filter, 25 is a silicon powder output pipeline, and 26 is a nitrogen main pipe inlet of the silicon powder sending device;

[0033] 3 is a ground scale;

[0034] 8 is a central dust removal device, 800 is a central silicon powder filter, 801 is a first bottom valve of the central dust removal device, 802 is a second bottom valve of the central dust removal device, 803 is a dust collector, 804 is a bottom valve of the dust collector, 805 is a module scale, 806 is a rapping device, 807 is a ton bag, 808 is a foundation ground, 809 is a gas source instrument gas remote control valve of the rapping device, 813 is a ton bag fastening port, 814 is a gas source instrument gas, and 815 is a silicon powder total input port. DETAILED DESCRIPTION

[0035] The general idea of the utility model is as follows:

[0036] 1. A central dust removal device + silicon powder filtering subsystem combination is adopted to perform centralized powder discharge mode.

[0037] 2. A nitrogen sending mode is adopted, and nitrogen is used to press the silicon powder from the silicon powder sending device to the central dust collector.

[0038] 3. The repeated ton bag station in each silicon powder filtering subsystem is removed, and the production and construction cost is reduced.

[0039] 4. A sequence control system is used for automatic adjustment, and the valve opening and closing sequence is controlled.

[0040] 5. Each silicon powder filtering subsystem can be independently operated, so that the shutdown powder discharge is eliminated, and the use efficiency of the dust removal system is improved.

[0041] The key technical scheme of the utility model is as follows:

[0042] 1. The bottom of the dust filter of the silicon powder filtering subsystem is removed;

[0043] 2. The bucket type silicon powder sending device 2 is installed at the original silicon powder ton bag station position, and the contact port is connected by flange;

[0044] 3. Two valves 11 and 12 are installed at the bottom of the dust filter 1 of the silicon powder filtering subsystem to ensure sealing;

[0045] 4. A scale 3 is added to the bottom of the silicon powder filtering subsystem.

[0046] The detailed technical scheme is as follows: a centralized dust removal system for granular silicon production, as shown in Figure 1 , comprising: a plurality of silicon powder filtering subsystems 7 respectively connected to a central dust removal device 8.

[0047] The gas containing silicon powder is sent to each silicon powder filtering subsystem 7 through a silicon powder input pipeline 13 to filter the silicon powder, and the silicon powder obtained after filtering of each silicon powder filtering subsystem 7 is sent to the silicon powder input port 815 of the central dust removal device 8 through a silicon powder output pipeline 25.

[0048] As shown in Figure 2 , the silicon powder filtering subsystem 7 comprises: a silicon powder filter 1 for filtering silicon powder, and a first bottom valve 11 and a second bottom valve 12 of the silicon powder filter connected in series are arranged at the bottom of the silicon powder filter 1 to ensure sealing.

[0049] A silicon powder sending device 2 is arranged below the second bottom valve 12 of the silicon powder filter, for sending the silicon powder filtered by the silicon powder filter 1 to the central dust removal device 8.

[0050] The bottom of the silicon powder filtering subsystem 7 is further provided with a scale 3 for measuring the weight of the filtered silicon powder.

[0051] The silicon powder sending device 2 comprises: a silicon powder bin 20 for storing silicon powder, the top of the silicon powder bin 20 being connected with the second bottom valve 12 of the silicon powder filter for receiving silicon powder; and a powder discharge valve 22 arranged at the bottom of the silicon powder bin 20, the powder discharge valve 22 being connected with the central dust removal device 8 through a pipeline for sending silicon powder.

[0052] A nitrogen inlet valve 21 is arranged at one side of the top of the silicon powder bin 20 and is in fluid connection with a nitrogen main pipe inlet 26 of the silicon powder sending device, for filling nitrogen into the silicon powder bin 20, and a remote pressure gauge 23 is arranged at the other side of the top of the silicon powder bin 20 for detecting the internal pressure of the silicon powder bin 20.

[0053] As shown in Figure 3As shown, the central dust removal device 8 comprises a central silicon powder filter 800 for filtering silicon powder, and the bottom of the central silicon powder filter 800 is provided with a first bottom valve 801 and a second bottom valve 802 connected in series to ensure sealing.

[0054] The side below the central silicon powder filter 800 is provided with a silicon powder input port 815 for receiving the silicon powder sent by the silicon powder filtering subsystem 7.

[0055] The dust collector 803 is connected with the second bottom valve 802 of the central dust removal device for receiving the silicon powder filtered by the central dust removal device.

[0056] The side below the dust collector 803 is provided with a module scale 805 for measuring the weight of the silicon powder filtered by the central dust removal device.

[0057] The bottom of the dust collector 803 is provided with a bottom valve 804 connected with a ton bag 807 through a ton bag fastening port 813 for transmitting the silicon powder in the dust collector 803. The ton bag 807 is placed on the ground 808.

[0058] The bottom of the dust collector 803 is also provided with a vibrator 806 for vibrating the sidewall of the dust collector 803; the vibrator 806 is electrically connected with a gas source instrument gas remote control valve 809.

[0059] During production: open the two valves 11 and 12 at the bottom of the silicon powder filter 1, close the nitrogen inlet valve 21 and the silicon powder outlet valve 22 of the bucket-type silicon powder sending device 2, so as to ensure that the bucket-type silicon powder sending device 2 is always receiving the silicon powder falling from the dust collector filter 1 during the production and operation of the silicon powder filtering subsystem, and when the weight displayed by the ground scale 3 reaches the set value (for example, 300 kg) after the silicon powder filtering subsystem operates for a period of time, the sequence control system is started, the two valves 11 and 12 at the bottom of the dust removal filter 1 are automatically closed by the sequence control system, the silicon powder outlet valve 22 at the bottom of the silicon powder sending device 2 is automatically opened by the sequence control system, the nitrogen pressure charging valve 21 charges the silicon powder sending device 2, and the pressure of the silicon powder sending device 2 is maintained at 30 KPa by the remote pressure gauge 23. After the nitrogen pressure charging valve 21 is automatically opened, the central control interface automatically starts timing, and if the weight of the ground scale 3 does not change at 1 min, an alarm is sent to the central control interface to remind the central control personnel to communicate with the external operator for processing; when the weight displayed by the ground scale 3 is less than the set value (for example, 50 kg), the sequence control system closes the nitrogen pressure charging valve 21, and when the pressure of the remote pressure gauge 23 decreases to 0 KPa, the sequence control system automatically closes the silicon powder outlet valve 22 at the bottom of the silicon powder sending device 2, and the sequence control system opens the bottom valves 11 and 12 of the dust removal filter 1, so that the silicon powder sending structure is again in the state of receiving silicon powder.

[0060] The silicon powder of each silicon powder filtering subsystem 7 is sent to the central dust removal device 8, and the silicon powder is filtered and back-flushed, and the silicon powder on the filter core falls into the silicon powder dust collector 803, when the module scale 805 of the silicon powder dust collector 803 displays a weight of a set value (for example, 300KG), the sequence control system automatically closes the bottom powder discharge valves 801 and 802 of the central dust removal device 8, the sequence control system automatically opens the bottom powder discharge valve 804 of the silicon powder dust collector 803, the sequence control system automatically opens the instrument gas supply valve 809 of the vibrator 806, the vibrator 806 is opened, the silicon powder in the silicon powder dust collector 803 is vibrated by the external vibrator 806, the silicon powder enters the ton bag 807, when the module scale 805 displays a weight < the set value (for example, 5KG), the sequence control system sends a ton bag removal report to the central control system, and the gas supply valve 809 of the vibrator 806 is closed, the powder discharge valve 804 is closed, the powder discharge valves 801 and 802 at the bottom of the central dust removal device 8 are opened, and the silicon powder dust collector is in the silicon powder receiving state again, at this time, the central control personnel informs the external operator to remove and replace a new ton bag.

[0061] The utility model provides a kind of for the thought and method of centralized dust removal system of granular silicon production, the method and approach of specifically realizing this technical scheme are many, above-mentioned is only preferred implementation mode of the utility model, it should be pointed out, for the ordinary skilled in the art of this technical field, under the premise of not departing from the principle of the utility model, still can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.The components not explicitly in the embodiment can be realized by prior art.

Claims

1. A centralized dust removal system for production of granular silicon, characterized in that, The application relates to a central dust removal device (8) and a silicon powder filtering subsystem (7) for filtering silicon powder from a gas containing the silicon powder. The silicon powder filtering subsystem (7) comprises a silicon powder filter (1) for filtering the silicon powder and a silicon powder sending device (2) for sending the silicon powder, the silicon powder filter (1) is in fluid connection with the silicon powder sending device (2), and the silicon powder sending device (2) is in fluid connection with the silicon powder output pipeline (25). The central dust removal device (8) comprises a central silicon powder filter (800) for filtering the silicon powder, and a silicon powder total input port (815) for receiving the silicon powder is arranged on the central silicon powder filter (800), and the silicon powder total input port (815) is in fluid connection with the silicon powder output pipeline (25). A silicon powder filtering first bottom valve (11) and a silicon powder filtering second bottom valve (12) are arranged in sequence at the bottom of the silicon powder filter (1) and are used for outputting the silicon powder filtered by the silicon powder filter (1).

2. The centralized dust removal system for the production of particulate silicon according to claim 1, characterized in that, A silicon powder input pipeline (13) is arranged at the side of the bottom of the silicon powder filter (1) and is used for receiving the gas containing the silicon powder conveyed by an upstream system. The silicon powder sending device (2) comprises:

3. The centralized dust removal system for the production of particulate silicon according to claim 2, characterized in that, A hollow silicon powder bin (20) for storing the silicon powder, the top of the silicon powder bin (20) is in fluid connection with the silicon powder filtering second bottom valve (12); A powder discharging valve (22) is arranged at the bottom of the silicon powder bin (20) and is in fluid connection with the central dust removal device (8) through the silicon powder output pipeline (25). A nitrogen inlet valve (21) is arranged at one side of the top of the silicon powder bin (20) and is in fluid connection with a nitrogen main pipe inlet (26) and is used for filling nitrogen into the silicon powder bin (20); and a remote pressure gauge (23) is arranged at the other side of the top of the silicon powder bin (20) and is used for detecting the internal air pressure of the silicon powder bin (20).

4. The centralized dust removal system for the production of particulate silicon according to claim 3, characterized in that, The central dust removal device (8) comprises a central silicon powder filter (800) for filtering the silicon powder, and a silicon powder total input port (815) for receiving the silicon powder is arranged on the central silicon powder filter (800), and the silicon powder total input port (815) is in fluid connection with the silicon powder output pipeline (25).

5. The centralized dust removal system for the production of particulate silicon according to claim 4, characterized in that, The silicon powder total input port (815) is arranged at the side of the bottom of the central silicon powder filter (800). The central silicon powder filter (800) is provided with a hollow dust collector (803) for storing the silicon powder at the bottom, and the top of the dust collector (803) is in fluid connection with the central dust removal device second bottom valve (802) and is used for receiving and storing the silicon powder.

6. The centralized dust removal system for the production of particulate silicon according to claim 5, characterized in that, A bottom valve (804) is arranged below the dust collector (803), the bottom valve (804) is detachably connected with a ton bag (807) through a ton bag fastening port (813), and the ton bag (807) is used for storing the silicon powder.

7. The centralized dust removal system for the production of particulate silicon according to claim 6, characterized in that, A module scale (805) is arranged below the side of the bottom of the dust collector (803) and is used for measuring the weight of the silicon powder in the dust collector (803).

8. The centralized dust removal system for the production of particulate silicon according to claim 7, characterized in that, A vibrator (806) is further arranged below the dust collector (803) and is used for vibrating the side wall of the dust collector (803).

9. The centralized dust removal system for the production of particulate silicon according to claim 8, characterized in that, The vibrator (806) is electrically connected with a gas source instrument gas remote control valve (809).

10. The centralized dust removal system for the production of particulate silicon according to claim 9, characterized in that, ​

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