Raw material conveying device in polycrystalline silicon production
By adopting a parallel filter and delivery pump design in polysilicon production, the problems of energy waste and high maintenance costs of raw material conveying equipment in existing polysilicon production technologies have been solved, achieving efficient and low-cost raw material conveying.
Patent Information
- Application Number
- CN202520011007.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-03
AI Technical Summary
In existing polysilicon production, the raw material conveying equipment requires at least three shielded pumps to operate independently, resulting in energy waste, high equipment maintenance costs, and a shortened service life of the shielded pumps.
The design employs multiple filters and transfer pumps connected in parallel, with flow rate adjusted via control valves to meet the "two-for-one" configuration, reducing the number of transfer pumps and filters, and lowering power consumption and maintenance costs.
This enabled the efficient operation of multiple conveying devices, reduced energy waste, extended the service life of conveying pumps and filters, and lowered equipment maintenance costs.
Smart Images
Figure CN223609910U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to polycrystal silicon equipment technical field especially relates to a raw material conveying device in polycrystal silicon production. BACKGROUND
[0002] In the polycrystal silicon production process, fluid material needs to be transported between various chemical equipment and machines according to process requirements, and when transported from a low position to a high position, a centrifugal pump is a widely used fluid conveying machine, mainly composed of an impeller and a pump shell, driven by an electric motor to rotate at high speed, generating centrifugal force, which makes the liquid at the center of the impeller flow outward, and the kinetic energy and pressure energy obtained when the liquid flows outward make the fluid achieve the purpose of transportation. In the polycrystal silicon production process, the cold hydrogen process is to recover the by-product SiCl4 in the polycrystal silicon production process, and to react with metallurgical grade silicon (MG-Si) and hydrogen (H2) in a gas-solid fluidized bed reactor to produce trichlorosilane (SiHCl3) ; The raw material STC uses a canned pump to realize the transportation of fluid, and the power consumption and daily maintenance cost of the canned pump account for an important part of the production cost.
[0003] In the existing raw material conveying equipment, according to the requirements of the equipment, the canned pump must be set in a "two standby one" mode when in use, and the existing raw material conveying equipment is operated independently, that is, at least three canned pumps are required to meet the use requirements, and multiple canned pumps are operated, which not only wastes electric energy, but also greatly shortens the service life of the canned pump, and at the same time, increases the maintenance cost of the equipment. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model embodiment provides a raw material conveying device in polycrystal silicon production, which mainly aims to provide a raw material conveying device in polycrystal silicon production capable of reducing energy consumption and maintenance cost.
[0005] To achieve the above purpose, the utility model mainly provides the following technical scheme:
[0006] The utility model embodiment provides a raw material conveying device in polycrystal silicon production, which comprises:
[0007] The mixing components are multiple in number, each of which comprises a raw material pipeline, a raw material tank and a first control valve, the raw material pipeline is connected to the upper part of the raw material tank, and the first control valve is connected to the lower part of the raw material tank;
[0008] The conveying component comprises a parallel pipeline, a plurality of return pipelines, a plurality of branch pipelines, a plurality of filters and a plurality of conveying pumps, one end of the plurality of branch pipelines is connected to the first control valve, the other end is connected to the parallel pipeline, the filter and the conveying pump are arranged on the branch pipeline in one-to-one correspondence, one end of the return pipeline is connected to the parallel pipeline, and the other end is connected to the raw material tank.
[0009] The gasification component comprises a conveying pipeline, a gasifier, a reboiler and a heating and cooling component, one end of the conveying pipeline is connected to the parallel pipeline, the other end is connected to the gasifier, the top of the gasifier is connected to the heating and cooling component, and the reboiler is connected to the gasifier.
[0010] Further, the gasification component further comprises a production pipeline, one end of the production pipeline is connected to the heating and cooling component, and the other end is connected to the top of the raw material tank.
[0011] Further, the conveying component further comprises a shunt pipeline and a plurality of second control valves, one end of the shunt pipeline is connected to the first control valve, the other end is provided with a plurality of shunt interfaces, each shunt interface is connected to the branch pipeline in one-to-one correspondence, and the second control valve, the filter and the conveying pump are sequentially arranged on the branch pipeline.
[0012] Further, the conveying component further comprises a return regulating valve, and the return regulating valve is arranged on the return pipeline.
[0013] Further, the gasification component further comprises a first flow meter and a third control valve, and the first flow meter and the third control valve are sequentially arranged on the conveying pipeline.
[0014] Further, the heating and cooling component comprises an electric heater, a reactor, a cooler and a coarse classifier, one end of the electric heater is connected to the gasifier, the other end is connected to the reactor, one end of the cooler is connected to the reactor, the other end is connected to the coarse classifier, and the production pipeline is connected to the bottom of the coarse classifier.
[0015] Further, the heating and cooling component further comprises a second flow meter, and the second flow meter is arranged between the electric heater and the gasifier.
[0016] Further, the total control component is signal-connected to the first flow meter, the second flow meter, the first control valve, the second control valve and the third control valve respectively.
[0017] Compared with the prior art, the utility model has the following technical effects:
[0018] The technical scheme provided by the embodiment of the utility model discloses the effect of mixing component is mixing STC raw materials and byproduct SiCl4, the quantity of mixing component is multiple, every mixing component includes raw material pipeline, raw material jar and first control valve, the upper portion of raw material pipeline is connected to raw material jar, the lower portion of raw material jar is connected to first control valve, the effect of conveying component is adjusting the flow of mixed material into gasification component, conveying component includes parallel pipeline, multiple reflux pipeline, multiple branch pipeline, multiple filter and multiple conveying pump, one end of multiple branch pipeline is connected to first control valve, the other end is connected to parallel pipeline, filter and conveying pump are set up on branch pipeline one by one, one end of reflux pipeline is connected to parallel pipeline, the other end is connected to raw material jar, the effect of gasification component is outputting SiHCl3 and SiCl4, gasification component includes conveying pipeline, gasifier, reboiler and heating cooling component, one end of conveying pipeline is connected to parallel pipeline, the other end is connected to gasifier, the top of gasifier is connected to heating cooling component, reboiler is connected to gasifier, relative to prior art, shielding pump must adopt " two reserve one " setting mode when using, and, the raw material conveying equipment of prior art is all operated separately, that is to say, one raw material conveying equipment needs to be equipped with three shielding pumps at least to meet the use requirement, multiple shielding pumps operate, not only cause the waste of electric energy, also greatly shorten the service life of shielding pump, simultaneously, also improve the maintenance cost of equipment, in the technical scheme, multiple filter and multiple conveying pump are set up on branch pipeline, then multiple branch pipelines are connected in parallel, and the flow of output is adjusted through first control valve, so that multiple conveying devices not only meet " two reserve one " setting mode when using, also greatly reduce the number of conveying pump and filter, thereby reducing the waste of electric energy, increasing the service life of conveying pump and filter, simultaneously, also reduce the maintenance cost of equipment. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The utility model provides a kind of raw material conveying device in polycrystalline silicon production structure schematic diagram provided by the embodiment of the utility model. DETAILED DESCRIPTION
[0020] The utility model will be further explained in detail in combination with drawing and embodiment.
[0021] As Figure 1 The utility model provides a kind of raw material conveying device in polycrystalline silicon production, and the device includes:
[0022] Mixing components, the number of which is multiple, each of which comprises a raw material pipe 11 connected to the upper part of a raw material tank 12, and a first control valve 13 connected to the lower part of the raw material tank 12;
[0023] Delivery components, which comprise a parallel pipe 21, multiple return pipes 22, multiple branch pipes 23, multiple filters 24 and multiple delivery pumps 25, one end of the multiple branch pipes 23 being connected to the first control valve 13, the other end being connected to the parallel pipe 21, the filters 24 and the delivery pumps 25 being arranged one by one on the branch pipes 23, one end of the return pipes 22 being connected to the parallel pipe 21, the other end being connected to the raw material tank 12;
[0024] Gasification components, which comprise a delivery pipe 31, a gasifier, a reboiler 33 and a heating and cooling component, one end of the delivery pipe 31 being connected to the parallel pipe 21, the other end being connected to the gasifier 32, the top of the gasifier 32 being connected to the heating and cooling component, the reboiler 33 being connected to the gasifier 32.
[0025] The utility model discloses a technical scheme provided by the embodiment, the effect of the mixing component is to mix STC raw materials and byproduct SiCl4, the quantity of the mixing component is multiple, and each mixing component includes raw material pipeline 11, raw material tank 12 and first control valve 13, the raw material pipeline 11 is connected to the upper portion of raw material tank 12, and the first control valve 13 is connected to the lower portion of raw material tank 12, the effect of the conveying component is to adjust the flow of mixed material into the gasification component, and the conveying component includes parallel pipeline 21, multiple reflux pipeline 22, multiple branch pipeline 23, multiple filter 24 and multiple conveying pump 25, one end of multiple branch pipeline 23 is connected to the first control valve 13, the other end is connected to the parallel pipeline 21, the filter 24 and the conveying pump 25 are set on the branch pipeline 23 one by one, one end of the reflux pipeline 22 is connected to parallel pipeline 21, and the other end is connected to the raw material tank 12, the effect of the gasification component is to output SiHCl3 and SiCl4, and the gasification component includes conveying pipeline 31, gasifier, reboiler 33 and heating cooling component, one end of the conveying pipeline 31 is connected to parallel pipeline 21, and the other end is connected to the gasifier 32, the top of the gasifier 32 is connected to the heating cooling component, the reboiler 33 is connected to the gasifier 32, compared with the prior art, the shielding pump must adopt the setting mode of "two reserve one" when being used, and the existing raw material conveying equipment is operated separately, that is to say, one raw material conveying equipment needs to be equipped with three shielding pumps at least to meet the use requirement, multiple shielding pumps operate, not only cause the waste of electric energy, but also greatly shorten the service life of the shielding pump, simultaneously, improve the maintenance cost of the equipment, in the technical scheme, multiple filter 24 and multiple conveying pump 25 are set on the branch pipeline 23, then multiple branch pipeline 23 are connected in parallel, and the flow of output is adjusted through the first control valve 13, so that multiple conveying devices not only meet the setting mode of "two reserve one" when being used, but also greatly reduce the number of conveying pump 25 and filter 24, thereby reducing the waste of electric energy, increasing the service life of conveying pump 25 and filter 24, simultaneously, reducing the maintenance cost of the equipment.
[0026] The mixing components are used to mix the STC raw materials with the by-product SiCl4, and the number of the mixing components is multiple, each of which comprises a raw material pipeline 11, a raw material tank 12 and a first control valve 13, the raw material pipeline 11 is connected to the upper part of the raw material tank 12, the first control valve 13 is connected to the lower part of the raw material tank 12, the raw material pipeline 11 is used to transport the STC raw materials, one end of the raw material pipeline 11 is connected to the upper part of the raw material tank 12, the lower part of the raw material tank 12 is connected to one end of the first control valve 13, the other end of the first control valve 13 is connected to multiple branch pipelines 23, specifically, the conveying components further comprise a shunt pipeline 26 and multiple second control valves 27, one end of the shunt pipeline 26 is connected to the first control valve 13, the other end of the shunt pipeline 26 is provided with multiple shunt interfaces, each of the shunt interfaces is connected to the branch pipeline 23 one by one, the second control valve 27, the filter 24 and the conveying pump 25 are arranged on the branch pipeline 23 in sequence, the shunt pipeline 26 is used to shunt the mixed materials discharged from the first control valve 13, and then the mixed materials are introduced into the filter 24 through the second control valve 27, so that the mixed materials are filtered in batches; the conveying components are used to adjust the flow of the mixed materials into the gasification components, and the conveying components comprise multiple parallel pipelines 21, multiple backflow pipelines 22, multiple branch pipelines 23, multiple filters 24 and multiple conveying pumps 25, one end of the branch pipeline 23 is connected to the first control valve 13, and the other end of the branch pipeline 23 is connected to the parallel pipeline 21, the filter 24 and the conveying pump 25 are arranged on the branch pipeline 23 one by one, one end of the backflow pipeline 22 is connected to the parallel pipeline 21, and the other end of the backflow pipeline 22 is connected to the raw material tank 12, the filtered mixed materials are introduced into the parallel pipeline 21 through the conveying pump 25, the multiple branch pipelines 23 are connected to the parallel pipeline 21, the mixed gas is introduced into the parallel pipeline 21 from the branch pipeline 23, and then is introduced into the gasification components to be gasified, when the gas pressure in the parallel pipeline 21 is too large, the backflow pipeline 22 is opened, specifically, the conveying components further comprise a backflow adjusting valve 28, the backflow adjusting valve 28 is arranged on the backflow pipeline 22 and is used to control the opening degree of the backflow pipeline 22, and the excess mixed materials are conveyed into the raw material tank 12.The gasification component produces SiHCl3 and SiCl4, and includes a conveying pipe 31, a vaporizer, a reboiler 33 and a heating and cooling component, one end of the conveying pipe 31 is connected to the parallel pipe 21, and the other end is connected to the vaporizer 32, the top of the vaporizer 32 is connected to the heating and cooling component, the reboiler 33 is connected to the vaporizer 32, the mixed gas enters the vaporizer 32 for gasification, the reboiler 33 heats the mixed material in the vaporizer 32, the mixed material is discharged from the top of the vaporizer 32 and enters the heating and cooling component, SiHCl3 is produced at the top of the heating and cooling component, the gasification component also includes a production pipe, one end of the production pipe is connected to the heating and cooling component, and the other end is connected to the top of the raw material tank 12, SiCl4 is produced at the bottom of the heating and cooling component, and the SiCl4 returns to the raw material tank 12 from the production pipe, in the technical solution, a plurality of filters 24 and a plurality of conveying pumps 25 are arranged on the branch pipes 23, then the plurality of branch pipes 23 are connected in parallel, and the first control valve 13 is used to adjust the output flow, so that the plurality of conveying devices not only meet the "two standby one" setting mode when in use, but also greatly reduce the number of conveying pumps 25 and filters 24, thereby reducing the waste of electric energy, increasing the service life of the conveying pumps 25 and the filters 24, and reducing the maintenance cost of the equipment.
[0027] Further, the gasification component further includes a first flow meter 36 and a third control valve 37, the first flow meter 36 and the third control valve 37 are arranged on the conveying pipe 31 in sequence. In the embodiment, the gasification component is further limited, the first flow meter 36 and the third control valve 37 are arranged on the conveying pipe 31, the first flow meter 36 is used to monitor the gas flow entering the conveying pipe 31 in real time, and the third control valve 37 adjusts the opening degree according to the pressure in the vaporizer 32 and the heating and cooling component, so that the flow entering the vaporizer 32 meets the production demand.
[0028] Further, the heating and cooling component comprises an electric heater 341, a reactor 342, a cooler 343 and a rough separator 344, one end of the electric heater 341 is connected to the vaporizer 32, the other end is connected to the reactor 342, one end of the cooler 343 is connected to the reactor 342, the other end is connected to the rough separator 344, and the production pipeline is connected to the bottom of the rough separator 344. In the embodiment, the heating and cooling component is further limited, the second flow meter 38 is arranged between the electric heater 341 and the vaporizer 32, for detecting the flow entering the electric heater 341 in real time, the electric heater 341 heats the material to meet the temperature required for the reaction, and then enters the reactor 342 for a synthesis reaction, the tail gas generated by the reaction is cooled by the cooler 343 and then enters the rough separator 344 for separation, the light component SiHCl3 is discharged from the top of the rough separator 344, and the heavy component SiCl4 is returned to the raw material tank 12 from the production pipeline.
[0029] Further, the total control component is added, and the total control component is signal connected to the first flow meter 36, the second flow meter 38, the first control valve 13, the second control valve 27 and the third control valve 37 respectively. In the embodiment, the total control component is added, the total control component adopts an existing flow control system, can automatically adjust the opening size of different control valves according to the pressure in different devices and the flow of the pipeline, so that the technical effect of controlling the flow is achieved.
[0030] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of 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 raw material conveying device in a polysilicon production, characterized by, The device comprises: a plurality of mixing components, each of which comprises a raw material pipe, a raw material tank and a first control valve, the raw material pipe being connected to the upper part of the raw material tank, and the first control valve being connected to the lower part of the raw material tank; a conveying component, which comprises a parallel pipe, a plurality of return pipes, a plurality of branch pipes, a plurality of filters and a plurality of conveying pumps, one end of each of the branch pipes being connected to the first control valve, the other end being connected to the parallel pipe, the filters and the conveying pumps being arranged on the branch pipes one by one, one end of each of the return pipes being connected to the parallel pipe, the other end being connected to the raw material tank; a gasification component, which comprises a conveying pipe, a gasifier, a reboiler and a heating and cooling component, one end of the conveying pipe being connected to the parallel pipe, the other end being connected to the gasifier, the top of the gasifier being connected to the heating and cooling component, and the reboiler being connected to the gasifier.
2. The raw material conveying device for polysilicon production according to claim 1, wherein the gasification component further comprises a production pipe, one end of the production pipe being connected to the heating and cooling component, the other end being connected to the top of the raw material tank.
3. The raw material conveying device for polysilicon production according to claim 2, wherein the conveying component further comprises a shunt pipe and a plurality of second control valves, one end of the shunt pipe being connected to the first control valve, the other end being provided with a plurality of shunt interfaces, each of the shunt interfaces being connected to the branch pipes one by one, and the second control valves, the filters and the conveying pumps being arranged on the branch pipes in sequence.
4. The raw material conveying device for polysilicon production according to claim 3, wherein the conveying component further comprises a return flow regulating valve, the return flow regulating valve being arranged on the return pipe.
5. The raw material conveying device for polysilicon production according to claim 4, wherein the gasification component further comprises a first flow meter and a third control valve, the first flow meter and the third control valve being arranged on the conveying pipe in sequence.
6. The raw material conveying device for polysilicon production according to claim 5, wherein the heating and cooling component comprises an electric heater, a reactor, a cooler and a coarse classifier, one end of the electric heater being connected to the gasifier, the other end being connected to the reactor, one end of the cooler being connected to the reactor, the other end being connected to the coarse classifier, and the production pipe being connected to the bottom of the coarse classifier.
7. The raw material conveying device for polysilicon production according to claim 6, wherein the heating and cooling component further comprises a second flow meter, the second flow meter being arranged between the electric heater and the gasifier. The device further comprises: a general control component, which is signal connected to the first flow meter, the second flow meter, the first control valve, the second control valve and the third control valve respectively. 8. The raw material conveying apparatus for polysilicon production according to claim 7, wherein