CN205419793U - 48 start -up system to excellent polycrystalline silicon reduction furnace - Google Patents
48 start -up system to excellent polycrystalline silicon reduction furnace Download PDFInfo
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- 230000009467 reduction Effects 0.000 title claims abstract description 75
- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 34
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 136
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- 229920005591 polysilicon Polymers 0.000 claims description 10
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- 238000010586 diagram Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 101150112300 HVG1 gene Proteins 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a 48 start -up system to excellent polycrystalline silicon reduction furnace divide into 6 through the silicon core load with 48 couples of excellent polycrystalline silicon reduction furnace and organizes, and 8 pairs of sticks in the every group, every reducing furnace only need dispose 1 reduction main transformer, and the reduction power only need dispose 6 power cabinets in order to heat the silicon core load of 6 groups. Thereby make the input cost of equipment obtain reducing to singly overlapping 48 couples of excellent polycrystalline silicon electrical equipment area and also reducing, the plant area that needs to construct just also diminishes thereupon. When reducing furnace quantity is more, can dispose two sets of start -up system, ally oneself with the cabinet switch through mother and each other be reserve. The reducing furnace activation time has so further been shortened, and 2 sets each other can, one set of start -up system open the normal boot that another set start -up system ensures all reducing furnaces when breaking down for reserve start -up system to promote the equipment reliability of operation, improved production efficiency.
Description
Technical Field
The utility model relates to a polycrystalline silicon production system, in particular to a starting system of a 48-pair rod polycrystalline silicon reduction furnace.
Background
In the process of growing polysilicon, breakdown is firstly started and then reduction growth is carried out. Because silicon has high resistivity at normal temperature and is not easy to conduct, polysilicon manufacturers in the industry adopt external heating modes such as graphite heating, plasma heating, halogen lamps and the like, but have the defects of troublesome operation, long starting time, low efficiency, low starting success rate, influence on silicon purity, complex reduction equipment and the like.
And high-pressure start-up adopts the high-pressure electric start-up mode of several kilovolts, lets silicon core self generate heat to it is even, quick to make it generate heat about its inside and outside, can effectively solve above-mentioned drawback: the starting time can be shortened, the starting efficiency and the success rate can be improved, and the complexity of restoring the electrical equipment can be reduced. Therefore, the high-voltage starting mode has inherent advantages and is an optimal choice for producing high-quality polysilicon.
In the 48-pair-rod polycrystalline silicon reduction furnace adopted in the prior art, silicon core loads are divided into 9 groups in total, wherein the 9 groups comprise 3 groups of 4 pairs of rods and 6 groups of 6 pairs of rods, each reduction furnace needs to be provided with 2 reduction main transformers, and a reduction power supply needs to be provided with 9 power cabinets to heat the 9 groups of silicon core loads. Therefore, the existing 48-pair rod polycrystalline silicon reduction furnace has the following defects:
1. The investment cost is high;
2. the single set of 48 pairs of rod polycrystalline silicon electrical equipment occupies a large area, and the area of a factory building needing to be built is increased.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the problems that the investment cost of a traditional 48-pair rod polycrystalline silicon reduction furnace is high and the occupied area of a single set of 48-pair rod polycrystalline silicon electrical equipment is large, the 48-pair rod polycrystalline silicon reduction furnace starting system is low in equipment investment cost and small in occupied area.
In order to realize the purpose, the utility model discloses a technical scheme be:
a48 pairs of silicon cores are arranged in a polycrystalline silicon reduction furnace, 48 pairs of silicon cores are arranged in the reduction furnace, the 48 pairs of silicon cores are divided into 6 groups, and each group comprises 8 pairs of silicon cores, namely, A1 group, A2 group, B1 group, B2 group, C1 group and C2 group; wherein,
8 pairs of silicon cores in the A1 group are sequentially connected in series and then are equally divided into 2 groups, namely a first preferential breakdown group and a first post-breakdown group;
8 pairs of silicon cores in the A2 group are sequentially connected in series and then are equally divided into 2 groups, namely a second preferential breakdown group and a second post breakdown group;
the start-up system includes: the high-voltage starting power supply set, the maintaining power supply, the first switching cabinet and the second switching cabinet;
the first switch cabinet is connected with the silicon cores in the A1 group and the A2 group, the first switch cabinet is also connected with the high-voltage starting power supply group, and the high-voltage starting power supply group sequentially breaks through the silicon cores in the first preferential breakdown group, the second preferential breakdown group, the first post breakdown group and the second post breakdown group through the first switch cabinet;
The silicon cores in the first preferential breakdown group and the second preferential breakdown group are also respectively connected with the maintaining power supply, and the maintaining power supply is used for maintaining and heating the silicon cores broken down in the first preferential breakdown group or the second preferential breakdown group when the current passing through the silicon cores reaches a set value;
in the A1 group and the A2 group, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing reduction power supplies for the silicon cores in the group;
the second switch cabinet is connected with the silicon cores in the B1 group, the B2 group, the C1 group and the C2 group, the second switch cabinet is also connected with the high-voltage starting power supply group, and the high-voltage starting power supply group breaks through the silicon cores in the B1 group, the B2 group, the C1 group and the C2 group in sequence through the switch cabinet; in the group B1, the group B2, the group C1 and the group C2, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing reduction power supplies for the silicon cores in the group;
the power cabinet supplies power through a reduction main transformer.
As the preferred scheme of the utility model, the high-voltage starting power supply group comprises 4 high-voltage starting power supplies; and the 4 high-voltage starting power supplies are respectively connected in parallel with 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group or the second post breakdown group in a one-to-one correspondence manner.
As the preferred scheme of the utility model, equally divide 8 pairs of silicon cores in B1 group, B2 group, C1 group and the C2 group and be 4 times core group, every time core group includes adjacent two pairs of silicon cores, 4 high voltage starting power supply respectively with one time core group parallel connection.
As the preferred scheme of the utility model, first switch cabinet includes:
the 4 first five-pole vacuum contactors are respectively and correspondingly connected with the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group and the second post breakdown group, and 2 adjacent output ends of each first five-pole vacuum contactor are connected with a pair of silicon cores in parallel;
2 dipolar vacuum contactors, 2 dipolar vacuum contactors respectively with first preferential breakdown group and second preferential breakdown group correspond the connection, 2 output terminals of each dipolar vacuum contactor respectively with two silicon cores of head and the tail in a group of silicon cores parallel connection.
As a preferred embodiment of the present invention, the input terminal of each of the first five-pole vacuum contactors is further connected to the 4 high-voltage starting power supplies, and the 4 high-voltage starting power supplies simultaneously load voltages to 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group, or the second post breakdown group;
The input ends of the 2 dipolar vacuum contactors are all connected to the maintaining power supply, and the maintaining power supply simultaneously provides the maintaining power supply for 4 pairs of silicon cores in the first preferential breakdown group or the second preferential breakdown group.
As a preferred aspect of the present invention, the second switch cabinet includes:
4 second five-pole vacuum contactors, the 4 second five-pole vacuum contactors respectively with the silicon core in B1 group, B2 group, C1 group and C2 group correspond and be connected, every 2 output terminals that second five-pole vacuum contactors are adjacent all parallel connection 1 times core group.
As the preferred scheme of the utility model, each second five vacuum contactor's input still is connected to respectively 4 high-pressure starting power supplies, 4 high-pressure starting power supplies do simultaneously 8 load voltages to the silicon core in B1 group, B2 group, C1 group or the C2 group.
As the preferred embodiment of the present invention, the 4 first five-pole vacuum contactors and the 4 second five-pole vacuum contactors are respectively connected to the 4 high-voltage starting power supplies through 5 high-voltage buses, and the 2 two-pole vacuum contactors are respectively connected to the maintaining power supplies through 2 maintaining buses.
As the preferred scheme of the utility model, high pressure starting power all includes with the maintenance power: the input of the controllable device is 380V alternating current, the controllable device is controlled in a mode that the secondary side voltage of the transformer is limited through the secondary side current of the constant transformer, low-voltage alternating current is output to the primary side of the single-phase boosting transformer, the single-phase boosting transformer in the high-voltage starting power supply boosts the low-voltage alternating current and outputs 0-12 KV high-voltage alternating current, the single-phase boosting transformer in the maintaining power supply boosts the low-voltage alternating current and outputs 0-4 KV high-voltage alternating current, and the secondary side of the single-phase boosting transformer serves as the output end of the high-voltage starting power supply and the maintaining power supply.
As the utility model discloses a preferred scheme, include 2 the starting system, 2 the starting system connect through the mother allies oneself with the cabinet, each other is reserve for when one set of starting system breaks down, open another set of starting system and ensure the normal start-up of all reducing furnaces.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. silicon core loads of 48 pairs of rod polycrystalline silicon reduction furnaces are divided into 6 groups, 8 pairs of rods are arranged in each group, only 1 reduction main transformer needs to be configured for each reduction furnace, and only 6 power cabinets need to be configured for a reduction power supply to heat the 6 groups of silicon core loads. Therefore, the investment cost of the equipment is reduced, the occupied area of the single set of 48 pairs of rod polycrystalline silicon electrical equipment is also reduced, and the area of a factory building which needs to be built is also reduced.
2. When the number of the reduction furnaces is large, two sets of starting systems can be configured and are mutually standby through the bus coupler cabinet switch. Therefore, the starting time of the reduction furnace is further shortened, and the 2 sets of mutually standby starting systems can start the other set of starting system to ensure the normal starting of all the reduction furnaces when one set of starting system fails, so that the running reliability of equipment is improved, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a starting system of a 48-pair rod polysilicon reduction furnace according to the present invention.
Fig. 2 is a schematic diagram of a first step of a first start-up method in embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of a second step of the first start mode in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of a second starting method in embodiment 1 of the present invention.
Fig. 5 is a schematic diagram of two sets of starting systems provided in embodiment 2 of the present application, which are mutually standby.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
A starting system of a 48-pair rod polycrystalline silicon reduction furnace is disclosed, referring to FIG. 1, 48 pairs of silicon cores are arranged in the reduction furnace, the 48 pairs of silicon cores correspondingly reduce A, B, C three phases of a main transformer, the 48 pairs of silicon cores are divided into 6 groups, and each group comprises 8 pairs of silicon cores, namely each phase is divided into 2 groups, specifically, an A1 group, an A2 group, a B1 group, a B2 group, a C1 group and a C2 group; wherein,
The 8 pairs of silicon cores in the group A1 are sequentially connected in series and then equally divided into 2 groups, namely 4 pairs of silicon cores of the first preferential breakdown group and 4 pairs of silicon cores of the first post-breakdown group.
And 8 pairs of silicon cores in the group A2 are sequentially connected in series and then are equally divided into 2 groups, namely 4 pairs of silicon cores of the second preferential breakdown group and 4 pairs of silicon cores of the second post breakdown group.
8 pairs of silicon cores in the groups B1, B2, C1 and C2 are divided into 4 double-core groups, and each double-core group comprises two adjacent pairs of silicon cores.
The start-up system includes:
the high-voltage starting power supply group comprises 4 high-voltage starting power supplies, namely HVG 1-HVG 4.
The maintaining power supply WCG and the 4 high-voltage starting power supplies (HVG 1-HVG 4) comprise: the controllable device is input with 380V alternating current, the controllable device is controlled in a mode of limiting the secondary side voltage of the transformer through the secondary side current of the constant transformer, low-voltage alternating current is output to the primary side of the single-phase step-up transformer, the single-phase step-up transformer boosts the low-voltage alternating current and outputs high-voltage alternating current, and the secondary side of the single-phase step-up transformer is used as the output end of the high-voltage starting power supply and the maintaining power supply.
Specifically, the high-voltage starting power supply provides 0-12 KV alternating-current voltage, and the maintaining power supply provides 0-4 KV alternating-current voltage.
Referring to fig. 1, the input voltage of the high-voltage starting power supply and the high-voltage maintaining power supply is AC380V, the input end L1 of the high-voltage starting power supply HVG1 is connected with phase a, and the input end L2 is connected with phase B; the high-voltage starting power supply HVG2 inputs L1 to be connected with the phase B, and L2 is connected with the phase A; the input of a high-voltage starting power supply HVG3 is connected with the phase A through L1, the input of L2 is connected with the phase B, the input of a high-voltage starting power supply HVG4 is connected with the phase B through L1, and the input of L2 is connected with the phase A. Maintaining the input L1 of the power supply WCG connected with the phase A, and L2 connected with the phase B; an output terminal A2 of the high-voltage starting power supply HVG1 is in short circuit with an output terminal A1 of HVG2, an output terminal A2 of HVG2 is in short circuit with an output terminal A1 of HVG3, and an output terminal A2 of HVG3 is in short circuit with an output terminal A1 of HVG 4.
And a first switch cabinet QHG1 and a second switch cabinet QHG 2.
5 high-voltage buses output by the 4 high-voltage starting power supplies (HVG 1-HVG 4) are connected to the input end of the first switch cabinet QHG 1; 2 maintaining buses are connected to the input end of the first switching cabinet QHG1 at the output of the 1 maintaining power supply WCG;
the 4 high-voltage starting power supplies (HVG 1-HVG 4) output 5 high-voltage buses which are connected to the input end of the second switch cabinet QHG 2.
Specifically, the method comprises the following steps:
the first switching cabinet QHG1 includes:
The system comprises 4 first five-pole vacuum contactors (KM 11, KMM12, KM21 and KM 22), wherein the 4 first five-pole vacuum contactors are respectively and correspondingly connected with a first preferential breakdown group (A15-A18), a first post breakdown group (A11-A14), a second preferential breakdown group (A25-A28) and a second post breakdown group (A21-A24), and 2 adjacent output ends of each first five-pole vacuum contactor are connected with a pair of silicon cores in parallel. The detailed connection relationship is shown in FIG. 1: the output end of a first five-electrode vacuum contactor KM11 of a first switching cabinet QHG1 is connected to a first post-breakdown group of silicon cores A11-A14 in a reduction furnace A1 group, and the output end of a first five-electrode vacuum contactor KM12 of a first switching cabinet QHG1 is connected to a first preferential breakdown group of silicon cores A15-A18 in a reduction furnace A1 group; the output end of a first five-pole vacuum contactor KM21 of the first switch cabinet QHG1 is connected to a group A2 of the reduction furnace for the second time and then breaks down silicon cores A21-A24, and the output end of a first five-pole vacuum contactor KM22 of the first switch cabinet QHG1 is connected to a group A2 of the reduction furnace and then preferentially breaks down silicon cores A25-A28.
Specifically, the input end of each first five-pole vacuum contactor is further connected to 5 high-voltage buses at the output ends of the 4 high-voltage starting power supplies, so that the 4 high-voltage starting power supplies are connected in parallel with 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group or the second post breakdown group in a one-to-one correspondence manner, and are used for simultaneously loading voltage on the 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group or the second post breakdown group, and can sequentially breakdown the silicon cores in the first preferential breakdown group, the second preferential breakdown group, the first post breakdown group and the second post breakdown group.
2 dipolar vacuum contactors (K13, K23), 2 dipolar vacuum contactors respectively with first priority breakdown group and second priority breakdown group correspond the connection, 2 output terminals of each dipolar vacuum contactor respectively with two silicon cores of a set of silicon cores head and the tail in parallel connection, refer to fig. 1, the output terminal of dipolar vacuum contactor KM13 is connected with the first utmost point, the fifth utmost point of first five utmost point vacuum contactor KM12 output terminal, the output terminal of dipolar vacuum contactor KM23 is connected with the first utmost point, the fifth utmost point of first five utmost point vacuum contactor KM22 output terminal.
Specifically, the input ends of the 2 diode vacuum contactors are connected to 2 maintaining buses of the maintaining power supply, so that the silicon cores in the first preferential breakdown group and the second preferential breakdown group are further connected to the maintaining power supply respectively, and the maintaining power supply is used for providing the maintaining power supply for 4 pairs of silicon cores in the first preferential breakdown group or the second preferential breakdown group to maintain and heat the silicon cores when the current passing through the broken silicon cores in the first preferential breakdown group or the second preferential breakdown group reaches a set value, namely the current passing through the broken high-impedance silicon cores reaches the condition of activating the maintaining power supply.
In the A1 group and the A2 group, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing a reduction power supply for the silicon cores in the group and continuing subsequent heating when the output voltage and current of a high-voltage starting power supply and a maintaining power supply reach the voltage and current condition of activation and reduction.
The second switch cabinet comprises:
the silicon chips in the groups B1, B2, C1 and C2 are correspondingly connected with the 4 second five-pole vacuum contactors (KM 31, KM41, KM41 and KM 51), and 2 adjacent output ends of each second five-pole vacuum contactor are connected with 2 pairs of silicon chips in parallel. Referring to fig. 1, the output end of a second five-pole vacuum contactor KM31 of a second switch cabinet QHG2 is connected to groups of silicon cores B11-B18 of a reduction furnace B1; the output end of a second five-electrode vacuum contactor KM41 of a second switch cabinet QHG2 is connected to groups of silicon cores B21-B28 of a reduction furnace B2; the output end of a second five-electrode vacuum contactor KM51 of a second switch cabinet QHG2 is connected to a silicon core C11-C18 of a group C1 of the reduction furnace; the output end of a second five-electrode vacuum contactor KM61 of a second switch cabinet QHG2 is connected to a group of silicon cores C21-C28 of a reduction furnace C2.
Specifically, the input end of each second five-pole vacuum contactor is further connected to 5 high-voltage buses of the 4 high-voltage starting power supplies respectively, so that the 4 high-voltage starting power supplies are connected in parallel with one double-core group respectively, the 4 high-voltage starting power supplies simultaneously load voltages on 8 silicon cores in the B1 group, the B2 group, the C1 group or the C2 group, and the 4 high-voltage starting power supplies can sequentially break down the silicon cores in the B1 group, the B2 group, the C1 group and the C2 group.
In the groups B1, B2, C1 and C2, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing reduction power supplies for the silicon cores in the groups when the output voltage and current of the high-voltage starting power supply reach the voltage and current condition of activating the reduction power supplies.
The 4 first five-pole vacuum contactors and the 4 second five-pole vacuum contactors are respectively connected to the 4 high-voltage starting power supplies through 5 high-voltage buses, and the 2 two-pole vacuum contactors are respectively connected to the maintaining power supplies through 2 maintaining buses.
All the power cabinets are powered by a reduction main transformer.
For clarity of explanation of the technical solution of the present invention, the following describes the starting process of the starting system of the present invention in detail with reference to fig. 2-4.
A48 to excellent polycrystalline silicon reduction start-up system list cover start-up system's start-up process divide into two kinds of modes, the silicon core of A1 group and A2 group starts to adopt mode one, the silicon core of B1 group, B2 group, C1 group, C2 group starts to adopt mode two. Because silicon has very high resistivity at normal temperature and is not easy to conduct, the starting process of the reducing furnace is as follows: firstly, starting the silicon cores of the A1 group and the A2 group in the first mode, increasing the temperature in the reduction furnace after the silicon cores of the A1 group and the A2 group are started, and then starting the silicon cores of the B1 group, the B2 group, the C1 group and the C2 group in the second mode.
The starting method is as follows: firstly, when 4 high-voltage starting power supplies (HVG 1-HVG 4) and 1 maintaining power supply WCG are used for starting 8 pairs of silicon cores of A1 and A2 groups, the starting is completed in three steps, and the starting of the A1 groups of silicon cores is taken as an example for explanation.
Firstly, referring to fig. 2, a first five-pole vacuum contactor KM12 is attracted, 4 high-voltage starting power supplies (HVG 1-HVG 4) are respectively connected with 4 pairs of silicon cores A15, A16, A17 and A18 in a silicon core loop A1 in parallel in a one-to-one correspondence mode, and each high-voltage starting power supply breaks down 1 pair of silicon cores.
Secondly, referring to fig. 3, after 4 pairs of silicon cores A15, A16, A17 and A18 are broken down, when the output voltage and current of 4 high-voltage starting power supplies (HVG 1-HVG 4) reach the voltage and current condition of activating a maintaining power supply, a first five-pole vacuum contactor KM12 is disconnected, the 4 high-voltage starting power supplies (HVG 1-HVG 4) stop working, then a two-pole vacuum contactor KM13 is pulled in, and the 4 pairs of silicon cores are maintained to continuously heat by a maintaining power supply WCG; and then the first five-electrode vacuum contactor KM11 is attracted, the 4 high-voltage starting power supplies (HVG 1-HVG 4) are correspondingly connected with the 4 pairs of silicon cores A11, A12, A13 and A14 in parallel one by one, and each high-voltage starting power supply breaks down 1 pair of silicon cores.
Thirdly, referring to fig. 4, when the output voltage and current of the 4 high-voltage starting power supplies (HVG 1-HVG 4) and the maintaining power supply WCG in the second step both reach the voltage and current condition of activating the reduction power supply, the first five-pole vacuum contactor KM11 and the two-pole vacuum contactor KM13 are both disconnected, at this time, the contactor KM10 is connected in parallel for attracting, 8 pairs of silicon cores from a11 to a18 are connected with a power cabinet, and the power cabinet provides the reduction power supply to continue to heat the 8 pairs of silicon cores subsequently.
Similarly, the silicon chip of the group A2 can be broken down by adopting a similar method, and when the output voltage and current of the 4 high-voltage starting power supplies (HVG 1-HVG 4) reach the voltage and current condition of activating the maintaining power supply, the first five-pole vacuum contactor KM22 is disconnected, the two-pole vacuum contactor KM23 is pulled in, and the maintaining power supply WCG is used for maintaining the 4 pairs of silicon chips to continuously heat; then the first five-electrode vacuum contactor KM21 is used for attracting, and the rest 4 pairs of silicon cores of A2 are broken down; when the output voltage and current of 4 high-voltage starting power supplies (HVG 1-HVG 4) and a maintaining power supply WCG reach the voltage and current condition of activating a reduction power supply, the first five-pole vacuum contactor KM21 and the dipolar vacuum contactor KM23 are both disconnected, at the moment, the contactors are connected for pull-in, the 8 pairs of silicon cores from A21 to A28 are connected with a power cabinet, and the power cabinet provides the reduction power supply to continuously heat the 8 pairs of silicon cores subsequently.
And a second starting mode: after the silicon cores of the A1 group and the A2 group are started in the above way, the temperature in the reduction furnace is increased, the silicon cores of the B1 group, the B2 group, the C1 group and the C2 group are punctured in a way that each high-voltage starting power supply corresponds to 2 silicon rods, and the power supply is maintained not to work at the moment. Taking starting B1 groups of silicon cores as an example, referring to FIG. 5, the second five-electrode vacuum contactor KM31 is attracted, 4 high-voltage starting power supplies (HVG 1-HVG) 4 run, 4 core-doubling groups in the B1 group are respectively connected in parallel with the 4 high-voltage starting power supplies in a one-to-one correspondence mode, and each high-voltage starting power supply breaks down 2 pairs of adjacent silicon cores connected in series. When the silicon cores of the group B1 are broken down and the output voltage and current of the high-voltage starting power supply (HVG 1-HVG 4) reach the voltage and current condition of activation and reduction, the second five-pole vacuum contactor KM31 is disconnected, at the moment, the contactor KM30 is connected for pull-in, the 8 pairs of silicon cores from B11 to B18 are connected with a power cabinet, and the power cabinet provides the reduction power supply to continuously heat the 8 pairs of silicon cores in a subsequent process.
Similarly, the silicon cores in the group B2, the group C1 and the group C2 can be broken down in sequence by adopting a similar method, and when the output voltage and current of the high-voltage starting power supply (HVG 1-HVG 4) reach the voltage and current condition of activating and reducing, the corresponding second five-pole vacuum contactor is disconnected, so that the corresponding parallel contactor is pulled in, 8 pairs of silicon cores in the group B2, the group C1 and the group C2 are respectively connected with a power cabinet, and the reducing power supply is provided by the power cabinet to continuously heat the 8 pairs of silicon cores.
In summary, in this embodiment, the silicon core loads of 48 pairs of rod polysilicon reduction furnaces are divided into 6 groups, each group has 8 pairs of rods, each reduction furnace only needs to be configured with 1 reduction main transformer, and the reduction power supply only needs to be configured with 6 power cabinets to heat the 6 groups of silicon core loads. Therefore, the investment cost of the equipment is reduced, the occupied area of the single set of 48 pairs of rod polycrystalline silicon electrical equipment is also reduced, and the area of a factory building which needs to be built is also reduced.
Example 2
As shown in fig. 5, when the number of the reduction furnaces is large, in order to further shorten the time of the starting process, two sets of starting systems (i.e., "starting system a" and "starting system B") may be provided, and each of the starting system a and the starting system B is composed of 4 high-voltage starting power supplies and 1 maintaining power supply. And each starting system controls the starting of a plurality of reducing furnaces through a plurality of switch cabinets.
The two sets of starting systems are connected through a bus connection cabinet, and two high-voltage isolating switches (including a 3-pole switch and a 4-pole switch, the switch type is a high-voltage disconnecting link) are arranged in the bus connection cabinet and are mutually standby. When the starting system A and the starting system B are both normal, disconnecting a disconnecting link of the buscouple cabinet, starting the 1-N # reduction furnace by the starting system A, starting the N + 1-2N # reduction furnace by the starting system B, and simultaneously operating the two starting systems without mutual influence; if the 'starting system A' has a fault, disconnecting links of the bus coupler cabinets can be closed, and all the reducing furnaces are started by the 'starting system B' for 1-2N #; similarly, if the 'starting system B' has a fault, the disconnecting link of the busbar cabinet can be closed, and all the reduction furnaces 1-2N # are started by the 'starting system A'.
The reference numeral 7 on each connecting line in the figure indicates that there are 7 connecting lines, i.e. 5 high voltage busbars and 2 maintenance busbars.
In summary, 2 sets of mutually standby starting systems are arranged, so that when one set of starting system fails, the other set of starting system is started to ensure the normal starting of all the reduction furnaces.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A starting system of a 48-pair rod polycrystalline silicon reduction furnace is characterized in that 48 pairs of silicon cores are arranged in the reduction furnace, the 48 pairs of silicon cores are divided into 6 groups, and each group comprises 8 pairs of silicon cores, namely, A1 group, A2 group, B1 group, B2 group, C1 group and C2 group; wherein,
8 pairs of silicon cores in the A1 group are sequentially connected in series and then are equally divided into 2 groups, namely a first preferential breakdown group and a first post-breakdown group;
8 pairs of silicon cores in the A2 group are sequentially connected in series and then are equally divided into 2 groups, namely a second preferential breakdown group and a second post breakdown group;
the start-up system includes: the high-voltage starting power supply set, the maintaining power supply, the first switching cabinet and the second switching cabinet;
the first switch cabinet is connected with the silicon cores in the A1 group and the A2 group, the first switch cabinet is also connected with the high-voltage starting power supply group, and the high-voltage starting power supply group sequentially breaks through the silicon cores in the first preferential breakdown group, the second preferential breakdown group, the first post breakdown group and the second post breakdown group through the first switch cabinet;
the silicon cores in the first preferential breakdown group and the second preferential breakdown group are also respectively connected with the maintaining power supply, and the maintaining power supply is used for maintaining and heating the silicon cores broken down in the first preferential breakdown group or the second preferential breakdown group when the current passing through the silicon cores reaches a set value;
In the A1 group and the A2 group, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing reduction power supplies for the silicon cores in the group;
the second switch cabinet is connected with the silicon cores in the B1 group, the B2 group, the C1 group and the C2 group, the second switch cabinet is also connected with the high-voltage starting power supply group, and the high-voltage starting power supply group breaks through the silicon cores in the B1 group, the B2 group, the C1 group and the C2 group in sequence through the switch cabinet; in the group B1, the group B2, the group C1 and the group C2, each group of silicon cores is respectively connected with a power cabinet, and the power cabinets are used for providing reduction power supplies for the silicon cores in the group;
the power cabinet supplies power through a reduction main transformer.
2. The starting system of the 48-pair rod polycrystalline silicon reduction furnace according to claim 1, wherein the high voltage starting power supply set comprises 4 high voltage starting power supplies; and the 4 high-voltage starting power supplies are respectively connected in parallel with 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group or the second post breakdown group in a one-to-one correspondence manner.
3. The starting system for the 48-pair rod polycrystalline silicon reduction furnace according to claim 2, wherein 8 pairs of silicon cores in the groups B1, B2, C1 and C2 are divided into 4 times of core groups, each time of core group comprises two adjacent pairs of silicon cores, and the 4 high-voltage starting power supplies are respectively connected with one time of core group in parallel.
4. The system for starting up a 48 pair rod polysilicon reduction furnace according to claim 3, wherein the first switching cabinet comprises:
the 4 first five-pole vacuum contactors are respectively and correspondingly connected with the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group and the second post breakdown group, and 2 adjacent output ends of each first five-pole vacuum contactor are connected with a pair of silicon cores in parallel;
2 dipolar vacuum contactors, 2 dipolar vacuum contactors respectively with first preferential breakdown group and second preferential breakdown group correspond the connection, 2 output terminals of each dipolar vacuum contactor respectively with two silicon cores of head and the tail in a group of silicon cores parallel connection.
5. The starting system of the 48-pair rod polycrystalline silicon reduction furnace according to claim 4, wherein the input end of each first five-pole vacuum contactor is further connected to the 4 high-voltage starting power supplies respectively, and the 4 high-voltage starting power supplies simultaneously load voltage on 4 pairs of silicon cores in the first preferential breakdown group, the first post breakdown group, the second preferential breakdown group or the second post breakdown group;
The input ends of the 2 dipolar vacuum contactors are all connected to the maintaining power supply, and the maintaining power supply simultaneously provides the maintaining power supply for 4 pairs of silicon cores in the first preferential breakdown group or the second preferential breakdown group.
6. The system for starting up a 48 pair rod polysilicon reduction furnace according to claim 5, wherein the second switch cabinet includes:
4 second five-pole vacuum contactors, the 4 second five-pole vacuum contactors respectively with the silicon core in B1 group, B2 group, C1 group and C2 group correspond and be connected, every 2 output terminals that second five-pole vacuum contactors are adjacent all parallel connection 1 times core group.
7. The starting system of the 48-pair rod polysilicon reducing furnace according to claim 6, wherein the input terminal of each second five-pole vacuum contactor is further connected to the 4 high-voltage starting power supplies respectively, and the 4 high-voltage starting power supplies simultaneously apply voltage to 8 silicon cores in the groups B1, B2, C1 or C2.
8. The starting system of a 48 pair rod polysilicon reducing furnace according to claim 7, wherein the 4 first five-pole vacuum contactors and the 4 second five-pole vacuum contactors are respectively connected to the 4 high voltage starting power supplies through 5 high voltage bus bars, and the 2 two-pole vacuum contactors are respectively connected to the sustaining power supplies through 2 sustaining bus bars.
9. The starting system of a 48 pair rod polysilicon reduction furnace according to any one of claims 1 to 8, wherein the high voltage starting power supply and the sustaining power supply each comprise: the input of the controllable device is 380V alternating current, the controllable device is controlled in a mode that the secondary side voltage of the transformer is limited through the secondary side current of the constant transformer, low-voltage alternating current is output to the primary side of the single-phase boosting transformer, the single-phase boosting transformer in the high-voltage starting power supply boosts the low-voltage alternating current and outputs 0-12 KV high-voltage alternating current, the single-phase boosting transformer in the maintaining power supply boosts the low-voltage alternating current and outputs 0-4 KV high-voltage alternating current, and the secondary side of the single-phase boosting transformer serves as the output end of the high-voltage starting power supply and the maintaining power supply.
10. The starting system for the 48-pair rod polycrystalline silicon reduction furnace according to claim 9, which comprises 2 sets of starting systems, wherein the 2 sets of starting systems are connected through a bus connection cabinet and are mutually standby, and when one set of starting system fails, the other set of starting system is started to ensure the normal starting of all the reduction furnaces.
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| CN201521064698.XU CN205419793U (en) | 2015-12-17 | 2015-12-17 | 48 start -up system to excellent polycrystalline silicon reduction furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111026A (en) * | 2017-12-22 | 2018-06-01 | 南京因泰莱电器股份有限公司 | It is a kind of to possess from the polysilicon power-supply controller of electric implementation method for opening function |
| CN110482554A (en) * | 2018-05-15 | 2019-11-22 | 新特能源股份有限公司 | Reduction furnace high voltage startup system and method |
| CN110683547A (en) * | 2019-11-18 | 2020-01-14 | 新疆东方希望新能源有限公司 | Novel 72-pair rod reduction furnace high-voltage breakdown system and method thereof |
-
2015
- 2015-12-17 CN CN201521064698.XU patent/CN205419793U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111026A (en) * | 2017-12-22 | 2018-06-01 | 南京因泰莱电器股份有限公司 | It is a kind of to possess from the polysilicon power-supply controller of electric implementation method for opening function |
| CN108111026B (en) * | 2017-12-22 | 2020-09-18 | 南京因泰莱电器股份有限公司 | Implementation method of polycrystalline silicon power supply controller with self-starting function |
| CN110482554A (en) * | 2018-05-15 | 2019-11-22 | 新特能源股份有限公司 | Reduction furnace high voltage startup system and method |
| CN110683547A (en) * | 2019-11-18 | 2020-01-14 | 新疆东方希望新能源有限公司 | Novel 72-pair rod reduction furnace high-voltage breakdown system and method thereof |
| CN110683547B (en) * | 2019-11-18 | 2023-12-26 | 新疆东方希望新能源有限公司 | 72-pair rod reduction furnace high-voltage breakdown system and method thereof |
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