System for monitoring the production and operation status of FBR granular silicon
By using a vibration signal acquisition module and a DCS controller in the fluidized bed distributor, the real-time vibration signals of the fluidized bed distributor are monitored, and the problem of difficulty in monitoring the fluidization phenomenon in the existing technology is solved, and local blockages are discovered in a timely manner to ensure production efficiency and safety.
Patent Information
- Application Number
- CN202421932892.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The prior art is difficult to monitor the fluidization phenomenon inside the fluidized bed distributor, which makes it difficult to detect local blockages in a timely manner, affecting production efficiency and posing safety hazards.
The vibration signal acquisition module is used to obtain the real-time vibration signal of the fluidized bed distributor, and compare it with the vibration signal threshold under uniform operating conditions through the DCS controller to control the start and stop of the fluidized bed distributor to monitor the fluidization situation.
It can promptly detect local blockages inside the fluidized bed distributor, ensure production efficiency and avoid safety hazards.
Smart Images
Figure CN222733856U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of granular silicon, and in particular to a system for monitoring the production and operation status of FBR granular silicon. Background Art
[0002] The multiphase flow system is used in the production process of granular silicon, which is mainly used for the chemical reaction between solid granular silicon and gas. In the FBR reaction process, the fluidizing gas passes through the solid granular silicon bed, making the granular silicon in a fluidized state, thereby increasing the contact area and mass transfer efficiency between the granular silicon and the fluidizing gas. At present, the operating status of the fluidized bed distributor is mainly determined by parameters such as bed pressure and temperature to determine the quality of the graphite components inside the fluidized bed distributor, and it cannot reflect the state of the fluidization phenomenon inside the fluidized bed distributor, such as whether there is a local blockage inside the fluidized bed distributor.
[0003] Local blockage inside the fluidized bed distributor can cause several problems, such as:
[0004] 1) Decreased production efficiency: The principle of producing granular silicon by fluidized bed method is to use silane to react with hydrogen in the heating zone and deposit on silicon seed crystals to form granular silicon. If local blockage occurs, the flow of air and silane will be affected, resulting in reduced reaction efficiency, which in turn affects production efficiency;
[0005] 2) Safety hazards: Silane used in the fluidized bed method is flammable and explosive. Local blockage may affect the uniform distribution of gas in the reactor and increase safety risks.
[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content
[0007] Purpose of the utility model: The technical problem to be solved by the utility model is to address the deficiencies in the prior art and to provide a system for monitoring the production and operation status of FBR granular silicon. The system can monitor the state of fluidization inside the fluidized bed distributor, facilitate timely detection of local blockage inside the fluidized bed distributor and timely processing, thereby ensuring production efficiency and avoiding safety hazards.
[0008] In order to solve the above technical problems, the utility model discloses a system for monitoring the production and operation status of FBR granular silicon, the system comprising:
[0009] A vibration signal acquisition module is configured to obtain a real-time vibration signal of a fluidized bed distributor;
[0010] The DCS controller is configured to control the start and stop of the fluidized bed distributor (200) according to the real-time vibration signal and the vibration signal threshold under uniform working conditions.
[0011] Specifically, the real-time vibration signal includes the horizontal radial acceleration and axial acceleration of the lower part of the fluidized bed distributor. The vibration signal acquisition module includes a first acceleration transmitter and a second acceleration transmitter. The first acceleration transmitter is installed at the lower part of the outer wall of the fluidized bed distributor and is configured to obtain the horizontal radial acceleration of the lower part of the fluidized bed distributor, and convert the horizontal radial acceleration of the lower part of the fluidized bed distributor into a corresponding electrical signal. The second acceleration transmitter is installed at the bottom wall of the fluidized bed distributor and is configured to obtain the axial acceleration of the lower part of the fluidized bed distributor, and convert the axial acceleration of the lower part of the fluidized bed distributor into a corresponding electrical signal.
[0012] Furthermore, the real-time vibration signal also includes the horizontal radial acceleration of the upper portion of the fluidized bed distributor. The vibration signal acquisition module also includes a third acceleration transmitter, which is installed on the upper portion of the outer wall of the fluidized bed distributor and is configured to obtain the horizontal radial acceleration of the upper portion of the fluidized bed distributor and convert the horizontal radial acceleration of the upper portion of the fluidized bed distributor into a corresponding electrical signal.
[0013] Specifically, the first acceleration transducer (111), the second acceleration transducer (112) and the third acceleration transducer (113) are all acceleration transducers of model A0760GP.
[0014] Furthermore, it also includes an operation station, which is connected to the DCS controller.
[0015] Specifically, a plurality of the first acceleration transmitters are provided, and the plurality of the first acceleration transmitters are spaced apart along the circumference of the fluidized bed distributor.
[0016] Specifically, a plurality of the third acceleration transmitters are provided, and the plurality of the third acceleration transmitters are arranged at intervals along the circumference of the fluidized bed distributor.
[0017] Specifically, the first acceleration transmitter, the second acceleration transmitter and the third acceleration transmitter are connected to the DCS controller through armored shielded cables respectively.
[0018] Specifically, the fluidized bed distributor comprises a fluidized bed distributor body and a lining component, wherein a hollow chamber is arranged inside the fluidized bed distributor body. The lining component is installed in the hollow chamber of the fluidized bed distributor body. The first acceleration transmitter, the second acceleration transmitter and the third acceleration transmitter are respectively installed in the fluidized bed distributor body.
[0019] Specifically, the fluidized bed distributor comprises a fluidizing gas inlet, which is opened on the bottom wall of the fluidized bed distributor body and is used for supplying fluidizing gas into the hollow chamber.
[0020] Optionally, the lining component is made of graphite material.
[0021] Beneficial effects:
[0022] The utility model obtains the real-time vibration signal of the fluidized bed distributor through the vibration signal acquisition module. The spectrum indications and the response structure of the spectrum obtained by these vibration signal acquisition modules reflect the load of the internal particles on the inner wall of the fluidized bed distributor. By comparing the real-time vibration signal with the vibration signal threshold under uniform working conditions through the DCS controller, the state of the fluidization inside the fluidized bed distributor can be determined, which is convenient for timely discovery of local blockage inside the fluidized bed distributor and timely processing, ensuring production efficiency and avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, and the above and / or other advantages of the present invention will become more clear.
[0024] Figure 1 A schematic diagram of the structure of a system for monitoring the production and operation status of FBR granular silicon provided in one embodiment of the utility model.
[0025] Description of the accompanying drawings:
[0026] 110. Vibration signal acquisition module; 111. First acceleration transmitter; 112. Second acceleration transmitter; 113. Third acceleration transmitter; 120. DCS controller; 130. Operation station; 200. Fluidized bed distributor; 210. Fluidized bed distributor body; 220. Lining member; 230. Fluidizing gas inlet. DETAILED DESCRIPTION
[0027] See now Figure 1 This embodiment provides a system for monitoring the production and operation status of FBR granular silicon, and the system includes a vibration signal acquisition module 110 and a DCS controller 120.
[0028] The vibration signal acquisition module 110 is configured to acquire a real-time vibration signal of the fluidized bed distributor 200 .
[0029] The DCS controller 120 is configured to control the start and stop of the fluidized bed distributor 200 according to the real-time vibration signal and the vibration signal threshold under uniform working conditions.
[0030] DCS refers to distributed control system, which belongs to the conventional technology in this field. Distributed control system is a new generation of instrument control system based on microprocessor, adopting the design principle of decentralized control function, centralized display operation, and taking into account the design principles of decentralized autonomy and comprehensive coordination.
[0031] In some embodiments, see Figure 1 , the real-time vibration signal includes the horizontal radial acceleration and axial acceleration of the lower part of the fluidized bed distributor 200. The vibration signal acquisition module 110 includes a first acceleration transmitter 111 and a second acceleration transmitter 112. The first acceleration transmitter 111 is installed at the lower part of the outer wall of the fluidized bed distributor 200 and is configured to obtain the horizontal radial acceleration of the lower part of the fluidized bed distributor 200, and convert the horizontal radial acceleration of the lower part of the fluidized bed distributor into a corresponding electrical signal. The second acceleration transmitter 112 is installed at the bottom wall of the fluidized bed distributor 200 and is configured to obtain the axial acceleration of the lower part of the fluidized bed distributor 200, and convert the axial acceleration of the lower part of the fluidized bed distributor into a corresponding electrical signal.
[0032] In some embodiments, the real-time vibration signal also includes the horizontal radial acceleration of the upper portion of the fluidized bed distributor 200. The vibration signal acquisition module 110 also includes a third acceleration transmitter 113, which is installed on the upper portion of the outer wall of the fluidized bed distributor 200 and is configured to obtain the horizontal radial acceleration of the upper portion of the fluidized bed distributor 200, and convert the horizontal radial acceleration of the upper portion of the fluidized bed distributor into a corresponding electrical signal.
[0033] In the present application, the real-time vibration signals measured by the first acceleration transmitter 111 , the second acceleration transmitter 112 and the third acceleration transmitter 113 respectively reflect the load of the internal granular silicon on the inner wall area where each acceleration transmitter is located in the fluidized bed distributor 200 .
[0034] In some embodiments, see Figure 1 The system further includes an operation station 130 , which is connected to the DCS controller 120 .
[0035] In some embodiments, a plurality of first acceleration transmitters 111 are provided, and the plurality of first acceleration transmitters 111 are spaced apart along the circumference of the fluidized bed distributor 200 .
[0036] In some embodiments, a plurality of third acceleration transmitters 113 are provided, and the plurality of third acceleration transmitters 113 are spaced apart along the circumference of the fluidized bed distributor 200 .
[0037] In some embodiments, see Figure 1 The first acceleration transmitter 111, the second acceleration transmitter 112 and the third acceleration transmitter 113 are respectively connected to the DCS controller 120 through armored shielded cables.
[0038] In some embodiments, see Figure 1 The fluidized bed distributor 200 includes a fluidized bed distributor body 210 and a lining member 220. A hollow chamber is provided inside the fluidized bed distributor body 210. The lining member 220 is installed in the hollow chamber of the fluidized bed distributor body 210. The lining member 220 is used to provide a clean reaction environment without metal pollution for granular silicon production. The first acceleration transmitter 111, the second acceleration transmitter 112 and the third acceleration transmitter 113 are respectively installed in the fluidized bed distributor body 210.
[0039] Optionally, the lining member 220 is made of graphite material.
[0040] In some embodiments, see Figure 1 The fluidized bed distributor 200 includes a fluidizing gas inlet 230 , which is disposed on the bottom wall of the fluidized bed distributor body 210 and is used for supplying fluidizing gas into the hollow chamber. Figure 1 The bold black arrows shown represent the flow direction of the fluidizing gas.
[0041] In this embodiment, the first acceleration transmitter 111, the second acceleration transmitter 112 and the third acceleration transmitter 113 are all commercially available acceleration transmitters of model A0760GP.
[0042] In this embodiment, the vibration signal threshold under uniform working conditions includes a first acceleration threshold and a second acceleration threshold, wherein the first acceleration threshold corresponds to the first acceleration transmitter 111 and the second acceleration transmitter 112, and the second acceleration threshold corresponds to the third acceleration transmitter 113. In this embodiment, the first acceleration threshold is 7.5g, and the second acceleration threshold is 8g.
[0043] The process of using the system for monitoring the FBR granular silicon production operation status provided by the utility model to determine whether the fluidized bed distributor 200 is partially blocked is as follows:
[0044] Under uniform working conditions, the frequency spectra obtained by the first acceleration transmitter 111, the second acceleration transmitter 112 and the third acceleration transmitter have the same response structure and indication, reflecting that the random load of internal particles on the inner wall surface of the graphite component in the fluidized bed distributor 200 has the same statistical characteristic value.
[0045] When the fluidized bed distributor 200 is partially blocked, the spectrum indication obtained by the third acceleration transmitter is significantly weakened compared to the spectrum indication under uniform working conditions, and the spectrum obtained by the first acceleration transmitter 111 and the second acceleration transmitter 112 has a significantly different response structure. Since the fluidizing gas used to fluidize the granular silicon on the blocked side cannot pass through the area normally, the spectrum indications obtained by the first acceleration transmitter 111 and the second acceleration transmitter 112 on the blocked side are smaller than the spectrum indications under uniform working conditions.
[0046] The utility model obtains the real-time vibration signal of the fluidized bed distributor 200 through the vibration signal acquisition module 110. The spectrum indications and the response structure of the spectrum obtained by the vibration signal acquisition module 110 reflect the load of the internal particles on the inner wall of the fluidized bed distributor 200. The DCS controller 120 compares the real-time vibration signal with the vibration signal threshold under uniform working conditions, so as to determine the state of the fluidization condition inside the fluidized bed distributor 200, so as to timely discover the local blockage inside the fluidized bed distributor and shut down the fluidized bed distributor 200 in time, and deal with it in time to ensure production efficiency and avoid safety hazards.
[0047] The utility model provides a system idea and method for monitoring the production and operation status of FBR granular silicon. There are many methods and ways to implement the technical solution. The above is only the preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the utility model. All components not specified in this embodiment can be implemented by existing technologies.
Claims
1. A system for monitoring the production and operation status of FBR granular silicon, characterized in that: include: A vibration signal acquisition module (110), configured to acquire a real-time vibration signal of the fluidized bed distributor (200); A DCS controller (120) is configured to control the start and stop of the fluidized bed distributor (200) according to the real-time vibration signal and a vibration signal threshold under uniform working conditions; The real-time vibration signal comprises the horizontal radial acceleration and the axial acceleration of the lower part of the fluidized bed distributor (200); the vibration signal acquisition module (110) comprises a first acceleration transmitter (111) and a second acceleration transmitter (112); the first acceleration transmitter (111) is installed at the lower part of the outer wall of the fluidized bed distributor (200) and is configured to obtain the horizontal radial acceleration of the lower part of the fluidized bed distributor (200), and convert the horizontal radial acceleration of the lower part of the fluidized bed distributor (200) into a corresponding electrical signal; the second acceleration transmitter (112) is installed at the bottom wall of the fluidized bed distributor (200) and is configured to obtain the axial acceleration of the lower part of the fluidized bed distributor (200), and convert the axial acceleration of the lower part of the fluidized bed distributor (200) into a corresponding electrical signal.
2. The system for monitoring the production and operation status of FBR granular silicon according to claim 1, characterized in that: The real-time vibration signal also includes the horizontal radial acceleration of the upper portion of the fluidized bed distributor (200); the vibration signal acquisition module (110) also includes a third acceleration transmitter (113), the third acceleration transmitter (113) being installed on the upper portion of the outer wall of the fluidized bed distributor (200) and being configured to obtain the horizontal radial acceleration of the upper portion of the fluidized bed distributor (200), and converting the horizontal radial acceleration of the upper portion of the fluidized bed distributor (200) into a corresponding electrical signal.
3. The system for monitoring the production and operation status of FBR granular silicon according to claim 2, characterized in that: The first acceleration transmitter (111), the second acceleration transmitter (112) and the third acceleration transmitter (113) are all acceleration transmitters of model A0760GP.
4. The system for monitoring the production and operation status of FBR granular silicon according to claim 3, characterized in that: It also includes an operation station (130), wherein the operation station (130) is connected to the DCS controller (120).
5. The system for monitoring the production and operation status of FBR granular silicon according to claim 4, characterized in that: A plurality of the first acceleration transmitters (111) are provided, and the plurality of the first acceleration transmitters (111) are arranged at intervals along the circumference of the fluidized bed distributor (200); a plurality of the third acceleration transmitters (113) are provided, and the plurality of the third acceleration transmitters (113) are arranged at intervals along the circumference of the fluidized bed distributor (200).
6. The system for monitoring the production and operation status of FBR granular silicon according to claim 2 or 3, characterized in that: The first acceleration transmitter (111), the second acceleration transmitter (112) and the third acceleration transmitter (113) are respectively connected to the DCS controller (120) via armored shielded cables.
7. The system for monitoring the production and operation status of FBR granular silicon according to claim 2 or 3, characterized in that: The fluidized bed distributor (200) comprises: A fluidized bed distributor body (210), wherein a hollow chamber is arranged inside the fluidized bed distributor body (210); and a lining component (220), wherein the lining component (220) is installed in the hollow chamber of the fluidized bed distributor body (210); The first acceleration transmitter (111), the second acceleration transmitter (112) and the third acceleration transmitter (113) are respectively installed on the fluidized bed distributor body (210).
8. The system for monitoring the production and operation status of FBR granular silicon according to claim 7, characterized in that: The fluidized bed distributor (200) comprises a fluidizing gas inlet (230), and the fluidizing gas inlet (230) is opened on the bottom wall of the fluidized bed distributor body (210) and is used for fluidizing gas to enter the hollow chamber.
9. The system for monitoring the production and operation status of FBR granular silicon according to claim 7, characterized in that: The lining component (220) is made of graphite material.