A reducing furnace heat exchange pipeline flow detection alarm system

Abstract

This application provides a flow detection and alarm system for heat exchange pipes in a reduction furnace, relating to the field of polysilicon technology. It includes: a non-contact temperature measurement unit for real-time acquisition of temperature data on the surface of the heat exchange pipes; a data processing unit whose input is communicatively connected to the output of the non-contact temperature measurement unit; and an alarm unit whose control is communicatively connected to the output of the data processing unit. The heat exchange pipes are used to cool the electrodes of the reduction furnace. The data processing unit identifies the position and temperature of each heat exchange pipe from the temperature data and compares the temperature of each heat exchange pipe with a preset threshold. When the temperature of a heat exchange pipe exceeds the preset threshold, an anomaly is determined, and an alarm message is generated and sent to the alarm unit to trigger an alarm. The non-contact temperature measurement method, not installed on each heat exchange pipe, is suitable for scenarios where multiple heat exchange pipes are arranged side-by-side in a confined space.

Description

Technical Field

[0001] This utility model relates to the field of polycrystalline silicon technology, and in particular to a flow detection and alarm system for heat exchange pipelines in a reduction furnace. Background Technology

[0002] The polycrystalline silicon reduction furnace is equipped with heat exchange pipes, including an inlet water pipe and a return water pipe. Cooling water enters the reduction furnace through the inlet water pipe to remove heat from the electrodes and other components, and then flows back to the main return water pipe to achieve circulation. The flow rate in the heat exchange pipes needs to be monitored to trigger an alarm in case of insufficient or interrupted flow.

[0003] Currently, flow monitoring of heat exchange pipelines mostly uses contact-type devices such as electromagnetic flow meters and ultrasonic flow meters. However, these contact-type devices have problems such as complex installation, high cost, and difficulty in adapting to densely arranged water pipes. Utility Model Content

[0004] In view of the above situation, this utility model provides a flow detection and alarm system for heat exchange pipelines of reduction furnaces, which aims to solve the technical problems that current flow monitoring of heat exchange pipelines mostly adopts contact devices such as electromagnetic flow meters and ultrasonic flow meters, but these contact devices have problems such as complicated installation, high cost, and difficulty in adapting to densely arranged water pipes.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a flow detection and alarm system for the heat exchange pipeline of a reduction furnace, including:

[0007] A non-contact temperature measurement unit is used to collect temperature data of the surface of heat exchange pipes in real time.

[0008] The data processing unit has its input terminal connected in communication with the output terminal of the non-contact temperature measurement unit;

[0009] An alarm unit, whose control terminal is communicatively connected to the output terminal of the data processing unit, is located near the heat exchange pipe.

[0010] in:

[0011] The heat exchange pipes are used to cool the reduction furnace, and the detection range of the non-contact temperature measuring unit can cover at least one heat exchange pipe.

[0012] The data processing unit identifies the location and temperature of each heat exchange pipe from the temperature data and compares the temperature of each heat exchange pipe with a preset threshold. When the temperature of a heat exchange pipe exceeds the preset threshold, an anomaly is determined, and an alarm message is generated and sent to the alarm unit to trigger the alarm.

[0013] In some embodiments of this utility model, the non-contact temperature measurement unit includes an infrared camera.

[0014] In some embodiments of this invention, the alarm unit includes an audible and visual alarm located near the infrared camera.

[0015] In some embodiments of this utility model, the non-contact temperature measurement unit also includes a network video recorder and a video encoder, with the infrared camera, network video recorder and video encoder working together.

[0016] In some embodiments of this invention, the data processing unit is communicatively connected to the DCS system.

[0017] In some embodiments of this utility model, the infrared camera is communicatively connected to a mobile monitoring user terminal.

[0018] In some embodiments of this invention, the infrared camera is equipped with a dust cover.

[0019] In some embodiments of this invention, a cleaning structure for cleaning the lens of an infrared camera is also included.

[0020] In some embodiments of this invention, the cleaning structure includes an air blowing device.

[0021] In some embodiments of this invention, an ambient temperature sensor is also included, which is used to monitor the ambient temperature around the heat exchange pipe.

[0022] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0023] It adopts non-contact temperature measurement and is not installed on each heat exchange pipe, which can adapt to scenarios where multiple heat exchange pipes are arranged side by side in a narrow space, and can effectively and timely trigger on-site alarms.

[0024] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the on-site installation of the flow detection and alarm system for the heat exchange pipeline of the reduction furnace.

[0027] Figure 2 This is a topology diagram of the flow detection and alarm system for the heat exchange pipeline of the reduction furnace.

[0028] Icons: 1-Heat exchange pipe, 2-Reduction furnace, 3-Non-contact temperature measurement unit, 31-Infrared camera, 32-Dust cover, 4-Data processing unit, 5-Alarm unit, 61-Network video recorder, 62-Video encoder, 7-DCS system, 81-Monitoring screen, 82-Mobile monitoring user terminal, 91-Switch, 92-Fiber optic transceiver. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] The embodiments of this utility model will be described in detail below.

[0032] Example 1

[0033] See Figures 1-2 This embodiment provides a flow detection and alarm system for a reduction furnace heat exchange pipeline, including a non-contact temperature measurement unit 3, a data processing unit 4, and an alarm unit 5.

[0034] The non-contact temperature measuring unit 3 is installed near the heat exchange pipe 1 to collect the temperature data of the surface of the heat exchange pipe 1 in real time. The heat exchange pipe 1 is used to cool the electrodes of the reduction furnace 2 (and can also cool other parts of the reduction furnace). The detection range of the non-contact temperature measuring unit 3 can cover at least one heat exchange pipe 1.

[0035] The input terminal of the data processing unit 4 is communicatively connected to the output terminal of the non-contact temperature measurement unit 3.

[0036] The control terminal of alarm unit 5 is connected to the output terminal of data processing unit 4, and alarm unit 5 is located near the heat exchange pipeline 1.

[0037] The data processing unit 4 identifies the location (or number) and temperature of each heat exchange pipe 1 from the temperature data fed back by the non-contact temperature measurement unit 3, and compares the temperature of each heat exchange pipe 1 with a preset threshold. When the temperature of a heat exchange pipe 1 exceeds the preset threshold, it is determined to be abnormal. At the same time, alarm information such as the location (or number) of the abnormal heat exchange pipe 1, temperature, and abnormal time (timestamp) is generated and sent to the alarm unit 5 to trigger the on-site alarm.

[0038] This embodiment uses a non-contact temperature measurement method to measure the flow rate of heat exchange pipe 1. The principle is as follows: When water flows in heat exchange pipe 1, its temperature exchanges heat with the electrode protective cover connected to heat exchange pipe 1. The outer wall temperature of heat exchange pipe 1 is affected by the water temperature inside the pipe. If the water flow rate changes, such as a decrease or interruption, the rate at which the water in heat exchange pipe 1 carries away heat will also decrease, resulting in an abnormal temperature rise on the outer wall of the water pipe.

[0039] The value of the preset threshold is related to the material, insulation performance and ambient temperature of the heat exchange pipe 1. The preset threshold can be dynamically set within the range of 45~55℃.

[0040] This embodiment uses non-contact temperature measurement, which is not installed on each heat exchange pipe 1. It can adapt to scenarios where multiple heat exchange pipes 1 are arranged side by side in a narrow space, and can effectively and timely trigger on-site alarms.

[0041] Example 2

[0042] See Figures 1-2 The non-contact temperature measurement unit 3 includes an infrared camera 31, which is vertically installed 1-2 meters in front of the parallel heat exchange pipes 1. By adjusting the camera's focal length and field of view, the monitoring range can cover 20-30 heat exchange pipes 1. A single infrared camera 31 can monitor multiple heat exchange pipes 1 simultaneously, reducing deployment costs.

[0043] The alarm unit 5 includes an audible and visual alarm located near the infrared camera 31.

[0044] The non-contact temperature measurement unit 3 also includes a network video recorder 61 (NVR) and a video encoder 62. The network video recorder 61 is used to store and forward digital video acquired by the infrared camera 31, and the video encoder 62 is used to compress or decompress the digital video. The infrared camera 31, the network video recorder 61, and the video encoder 62 work together to complete the functions of video recording, storage, and forwarding.

[0045] This embodiment also includes a DCS system 7 (distributed control system), which is communicatively connected to the data processing unit 4. The data processing unit 4 pushes alarm information to the monitoring screen of the DCS system 7 via the OPC protocol, and the data communication server also supports standard industrial protocols such as Modbus / TCP.

[0046] This embodiment also includes a monitoring screen 81 and a mobile monitoring user terminal 82; the monitoring screen 81 is communicatively connected to the video encoder 62 and is mounted on the monitoring video wall in the control room. The mobile monitoring user terminal 82 is like a monitoring computer used by a field engineer, and it is communicatively connected to the infrared camera 31. The setup of the monitoring screen 81 and the mobile monitoring user terminal 82 provides richer monitoring methods.

[0047] The communication connections between the above-mentioned electronic devices are achieved through network cables, switches 91, optical fibers, optical fiber transceivers 92, etc.

[0048] Example 3

[0049] This embodiment is an improvement on embodiment 1 or 2.

[0050] See Figures 1-2 This embodiment also includes an ambient temperature sensor (not shown in the figure), which monitors the ambient temperature around the heat exchange pipe 1. This ambient temperature is compared with the temperature data collected by the non-contact temperature measurement unit 3. Even in cases of unstable ambient temperature, the ambient temperature sensor monitors the ambient temperature in real time and performs differential compensation on the temperature data to avoid misjudgments. Specifically, the differential compensation mechanism involves the ambient temperature sensor collecting ambient temperature data in real time, comparing this data with the temperature data on the surface of the heat exchange pipe 1, calculating the temperature difference, and then adjusting the temperature measurement value on the surface of the heat exchange pipe 1 accordingly. For example, when the ambient temperature rises, the temperature measurement value on the surface of the heat exchange pipe 1 may also rise. In this case, differential compensation can eliminate the influence of changes in ambient temperature, more accurately determine whether the flow rate inside the heat exchange pipe 1 is abnormal, and thus reduce misjudgments caused by environmental interference.

[0051] Example 4

[0052] This embodiment is an improvement on embodiment 2 or 3.

[0053] See Figures 1-2 In this embodiment, the infrared camera 31 is also equipped with a dust cover 32, a shockproof structure (not shown in the figure), and a cleaning structure (not shown in the figure) to ensure the long-term measurement accuracy of the infrared camera 31.

[0054] A dust cover 32 is installed over the infrared camera 31. A shockproof structure can be installed on the bracket of the infrared camera 31. A cleaning structure, such as an air blower, cleans the lens of the infrared camera 31 by blowing air.

[0055] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flow detection and alarm system for heat exchange pipes in a reduction furnace, characterized in that, include: A non-contact temperature measurement unit is used to collect temperature data of the surface of heat exchange pipes in real time. The data processing unit has its input terminal communicatively connected to the output terminal of the non-contact temperature measurement unit; An alarm unit, the control terminal of which is communicatively connected to the output terminal of the data processing unit, is located near the heat exchange pipe; in: The heat exchange pipe is used to cool the reduction furnace, and the detection range of the non-contact temperature measuring unit can cover at least one heat exchange pipe. The data processing unit identifies the location and temperature of each heat exchange pipe from the temperature data, and compares the temperature of each heat exchange pipe with a preset threshold. When the temperature of a heat exchange pipe exceeds the preset threshold, an abnormality is determined, and an alarm message is generated and sent to the alarm unit to trigger an alarm.

2. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 1, characterized in that, The non-contact temperature measurement unit includes an infrared camera.

3. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, The alarm unit includes an audible and visual alarm located near the infrared camera.

4. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, The non-contact temperature measurement unit also includes a network video recorder and a video encoder, and the infrared camera, the network video recorder and the video encoder work together.

5. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, The data processing unit is communicatively connected to the DCS system.

6. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, The infrared camera is connected to a mobile monitoring user terminal.

7. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, The infrared camera is equipped with a dust cover.

8. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 2, characterized in that, It also includes a cleaning structure for cleaning the lens of the infrared camera.

9. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to claim 8, characterized in that, The cleaning structure includes an air blowing device.

10. The flow detection and alarm system for the heat exchange pipeline of the reduction furnace according to any one of claims 1 to 9, characterized in that, It also includes an ambient temperature sensor, which is used to monitor the ambient temperature around the heat exchange pipes.

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