Thermal power generating unit hearth temperature measuring system based on multiple sensors

Abstract

The utility model relates to a thermal power generating unit hearth temperature measuring system based on multiple sensors, which relates to the technical field of hearth temperature measurement and comprises a sensing module, a data acquisition module, a hearth temperature measuring module and a display module. The sensing module is connected with the input end of the data acquisition module, the output end of the data acquisition module is connected with the input end of the hearth temperature measurement module, and the output end of the hearth temperature measurement module is connected with the input end of the display module; the data acquisition module acquires an electric signal through the sensing module; according to the utility model, the temperature sensors or the flow sensors are arranged at a plurality of places, and the measurement of the temperature in the hearth is realized by using the numerical values of easily measured parameters.

Description

Technical Field

[0001] The utility model relates to a furnace temperature measurement system for a thermal power unit based on multiple sensors, belonging to the technical field of furnace temperature measurement. Background Art

[0002] In thermal power generation, the furnace is a crucial site for fuel combustion. Furnace temperature reflects the distribution of heat load within the furnace, and its effective measurement is crucial for ensuring stable unit operation and equipment safety. The high temperature and complex environment within the furnace require furnace temperature measurement devices to be both accurate and adaptable to harsh operating conditions.

[0003] Traditional furnace temperature measurement relies on in-situ measurement using conventional temperature measuring instruments. Due to the harsh furnace environment and the susceptibility of instrument damage, a redundancy strategy is typically employed: multiple measuring points and multiple instruments are installed at a given location to mitigate the risk of damage from a single instrument. Consequently, when measuring temperatures at multiple locations, a large number of instruments must be installed, which is uneconomical and inevitably restricts the application of furnace temperature as a parameter in thermal power plant technology and research. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model proposes a furnace temperature measurement system for a thermal power unit based on multiple sensors.

[0005] The technical solution is as follows:

[0006] A multi-sensor-based furnace temperature measurement system for a thermal power unit. The boiler of the thermal power unit includes a high-temperature superheater, a high-temperature reheater, an economizer, and a water supply main pipe connected to the input end of the economizer. The system includes a sensor module, a data acquisition module, and a furnace temperature measurement module.

[0007] The sensing module is connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the input end of the furnace temperature measurement module;

[0008] The sensor module includes several temperature sensors and flow sensors, which are arranged inside the boiler of the thermal power unit and are used to collect temperature and water flow;

[0009] The data acquisition module obtains the electrical signal through the sensor module;

[0010] The furnace temperature measurement module converts the electrical signal into the furnace temperature of the thermal power unit.

[0011] As a preferred embodiment of the present invention, the temperature sensors are respectively arranged at the outlet pipe of the high-temperature superheater, the outlet pipe of the high-temperature reheater and the flue gas outlet of the economizer in the tail flue;

[0012] The flow sensor is arranged at the end of the water supply main pipe.

[0013] As a preferred embodiment of the present utility model, the data acquisition module includes an amplifier, a filter and an analog-to-digital converter;

[0014] The input end of the amplifier is connected to the sensing module, the output end of the amplifier is connected to the input end of the filter, and the output end of the filter is connected to the input end of the analog-to-digital converter;

[0015] The analog-to-digital converter converts the electrical signal into a digital signal.

[0016] As a preferred embodiment of the present invention, the furnace temperature measurement module includes a microprocessor and an interface circuit;

[0017] The input end of the microprocessor is connected to the output end of the analog-to-digital converter, and the output end of the microprocessor is connected to the input end of the interface circuit;

[0018] The microprocessor is used to convert the digital signal into the furnace temperature of the thermal power unit.

[0019] As a preferred embodiment of the present invention, it also includes a display module;

[0020] The display module includes a display LCD, a storage module, and a furnace temperature trend configuration module;

[0021] The input end of the storage module is connected to the output end of the interface circuit, the output end of the storage module is connected to the input end of the furnace temperature trend configuration module, and the output end of the furnace temperature trend configuration module is connected to the display LCD;

[0022] The furnace temperature trend configuration module is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit;

[0023] The LCD display is used to display a historical curve or a real-time curve of the furnace temperature of the thermal power unit.

[0024] As a preferred embodiment of the present invention, the furnace temperature trend configuration module includes a central processing unit (CPU) and a graphics processing unit (GPU);

[0025] The output end of the storage module is connected to the input end of the central processing unit (CPU), and the output end of the central processing unit (CPU) is connected to the display (LCD) via the graphics processing unit (GPU);

[0026] The central processing unit CPU is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit.

[0027] As a preferred embodiment of the present invention, the data acquisition module is connected to the furnace temperature measurement module via a twisted pair cable, and the CAN bus protocol is used for data transmission;

[0028] The sensor module is also connected to the data acquisition module via a twisted pair cable.

[0029] The utility model has the following beneficial effects:

[0030] This utility model measures furnace temperature by placing temperature sensors or flow sensors in multiple locations, utilizing the numerical values ​​of readily measurable parameters. An amplifier amplifies the weak signals received from the sensors, enhancing the signal's strength. A filter then filters out interference and noise, improving signal purity. Finally, an analog-to-digital converter converts the signals into digital signals, completing data collection. A display module also provides operators with a visual display of historical or real-time graphs of the thermal power unit's furnace temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the system structure diagram of the utility model. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be understood that the step numbers used herein are only for convenience of description and are not intended to limit the order in which the steps are executed.

[0034] It should be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. The terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their collections.

[0035] The term "and / or" refers to and includes any and all possible combinations of one or more of the associated listed items.

[0036] Example 1:

[0037] See also Figure 1 The utility model provides a furnace temperature measurement system for a thermal power unit based on multiple sensors. The boiler of the thermal power unit includes a high-temperature superheater, a high-temperature reheater, an economizer, and a water supply main pipe connected to the input end of the economizer. The system includes a sensor module, a data acquisition module, and a furnace temperature measurement module.

[0038] The sensing module is connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the input end of the furnace temperature measurement module;

[0039] The sensing module includes several temperature sensors (including thermocouples and infrared thermometers) and flow sensors (including flow transmitters), which are installed inside the boiler of the thermal power unit to collect temperature and water flow and output corresponding electrical signals according to the temperature and water flow;

[0040] The data acquisition module obtains the electrical signal through the sensor module;

[0041] The furnace temperature measurement module converts the electrical signal into the furnace temperature of the thermal power unit.

[0042] As a preferred embodiment of the present invention, the temperature sensors are respectively arranged at the outlet pipe of the high-temperature superheater, the outlet pipe of the high-temperature reheater and the flue gas outlet of the economizer in the tail flue;

[0043] The flow sensor is arranged at the end of the water supply main pipeline. By arranging temperature sensors or flow sensors at multiple locations, the temperature in the furnace is measured using the values ​​of easily measurable parameters.

[0044] As a preferred embodiment of the present utility model, the data acquisition module includes an amplifier, a filter and an analog-to-digital converter;

[0045] The input end of the amplifier is connected to the sensing module, the output end of the amplifier is connected to the input end of the filter, and the output end of the filter is connected to the input end of the analog-to-digital converter;

[0046] The analog-to-digital converter converts the electrical signal into a digital signal.

[0047] The weak electrical signal received from the sensor is amplified by an amplifier to enhance the strength of the electrical signal. The interference and noise in the electrical signal are filtered out by a filter to improve the purity of the signal. Finally, the electrical signal is converted into a digital signal through an analog-to-digital converter to complete data collection, providing an accurate data source for the furnace temperature measurement module.

[0048] As a preferred embodiment of the present invention, the furnace temperature measurement module includes a microprocessor and an interface circuit;

[0049] The input end of the microprocessor is connected to the output end of the analog-to-digital converter, and the output end of the microprocessor is connected to the input end of the interface circuit;

[0050] The microprocessor is used to convert the digital signal into the furnace temperature of the thermal power unit. The microprocessor has a built-in preset conversion algorithm, and the furnace temperature of the thermal power unit is obtained through the algorithm and each digital signal;

[0051] The above-mentioned preset algorithm can be implemented by the method disclosed in the patent document with publication number CN207112772U; it can also be implemented by the method disclosed in the published academic paper: Ren Yanyan. Research on nonlinear system identification algorithm based on intelligent computing and its application [D]. North China Electric Power University, 2014.

[0052] As a preferred embodiment of the present invention, it further includes a display module;

[0053] The display module includes a display LCD, a storage module (including a solid state drive, a mechanical hard drive, a dynamic random access memory, etc.), and a furnace temperature trend configuration module;

[0054] The input end of the storage module is connected to the output end of the interface circuit, the output end of the storage module is connected to the input end of the furnace temperature trend configuration module, and the output end of the furnace temperature trend configuration module is connected to the display LCD;

[0055] The interface circuit includes a data transmission line (including twisted pair, coaxial cable, optical fiber, etc.), a connector (including plugs, pins, etc.), a level converter, a control logic circuit and a protection circuit. Connectors are provided at both ends of the data transmission line, and a level converter, a control logic circuit and a protection circuit are provided in the middle in sequence. The interface circuit is used to connect the microprocessor and the storage module, and realize functions such as controlling the transmission direction and speed of data, protecting the storage module from damage such as overvoltage and overcurrent, and level adaptation.

[0056] The furnace temperature trend configuration module is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit;

[0057] The display LCD is used to display a historical curve graph or a real-time curve of the furnace temperature of the thermal power unit.

[0058] As a preferred embodiment of the present invention, the furnace temperature trend configuration module includes a central processing unit (CPU) and a graphics processing unit (GPU);

[0059] The output end of the storage module is connected to the input end of the central processing unit (CPU), and the output end of the central processing unit (CPU) is connected to the display (LCD) via the graphics processing unit (GPU);

[0060] The central processing unit CPU (provided with a program or software that can generate a corresponding curve graph based on the furnace temperature data. In this embodiment, this function can be achieved by conventionally using existing programs or software and is not limited here) is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit.

[0061] As a preferred embodiment of the present invention, the data acquisition module is connected to the furnace temperature measurement module via a twisted pair cable, and the CAN bus protocol is used for data transmission;

[0062] The sensor module is also connected to the data acquisition module via a twisted pair cable.

[0063] Twisted-pair cables are cheap and suitable for short-distance data transmission. If necessary, a repeater can be used to extend the transmission distance of the twisted-pair cables, which can meet the needs of furnace temperature measurement of thermal power units in this utility model. The CAN bus has an efficient communication protocol, strong anti-interference ability, and supports a higher data transmission rate, ensuring the reliability of this utility model.

[0064] Example 2:

[0065] Temperature sensors are installed at the outlet pipe of the high-temperature superheater, the outlet pipe of the high-temperature reheater and the flue gas at the economizer outlet, respectively, to collect temperature information at these locations in real time and convert this information into electrical signals; flow sensors are installed at the water supply main pipe to monitor the water supply flow and also convert the flow information into electrical signals.

[0066] The data acquisition module connects to the sensor module via a twisted-pair cable and receives electrical signals from the sensor module. The amplifier first amplifies the received electrical signal to ensure signal strength and stability. The filter then filters the amplified signal to remove noise and interference, improving signal accuracy. Finally, an analog-to-digital converter converts the filtered analog signal into a digital signal.

[0067] The output end of the analog-to-digital converter is connected to the microprocessor input end of the furnace temperature measurement module to transmit the digital signal to the microprocessor. The microprocessor converts the digital signal into the corresponding furnace temperature of the thermal power unit according to the preset algorithm based on the received digital signal.

[0068] The output end of the microprocessor is connected to the storage module through an interface circuit, and the obtained furnace temperature data of the thermal power unit is stored. The central processing unit CPU (with a built-in preset program) is used to draw a historical curve chart or a real-time curve chart of the furnace temperature of the thermal power unit (the historical furnace temperature data of the thermal power unit or the real-time furnace temperature data of the thermal power unit is retrieved from the storage module according to the operator's choice). Finally, the curve chart is rendered on the display LCD through the graphics processing unit GPU and displayed to the operator.

[0069] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b, c can be single or multiple. The above is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-sensor based furnace temperature measurement system for thermal power units, characterized in that: Including sensor module, data acquisition module and furnace temperature measurement module; The sensing module is connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the input end of the furnace temperature measurement module; The sensor module includes several temperature sensors and flow sensors, which are arranged inside the boiler of the thermal power unit and are used to collect temperature and water flow; The data acquisition module obtains the electrical signal through the sensor module; The furnace temperature measurement module converts the electrical signal into the furnace temperature of the thermal power unit.

2. The multi-sensor based furnace temperature measurement system for thermal power units according to claim 1, characterized in that: Temperature sensors are installed at the outlet pipe of the high-temperature superheater, the outlet pipe of the high-temperature reheater and the flue gas outlet of the economizer in the tail flue; The flow sensor is installed at the end of the water supply main pipe.

3. The multi-sensor based furnace temperature measurement system for thermal power generation units according to claim 1, characterized in that: The data acquisition module includes an amplifier, a filter and an analog-to-digital converter; The input end of the amplifier is connected to the sensing module, the output end of the amplifier is connected to the input end of the filter, and the output end of the filter is connected to the input end of the analog-to-digital converter; The analog-to-digital converter converts the electrical signal into a digital signal.

4. The multi-sensor based furnace temperature measurement system for thermal power generation units according to claim 3, characterized in that: The furnace temperature measurement module includes a microprocessor and an interface circuit; The input end of the microprocessor is connected to the output end of the analog-to-digital converter, and the output end of the microprocessor is connected to the input end of the interface circuit; The microprocessor is used to convert the digital signal into the furnace temperature of the thermal power unit.

5. The multi-sensor based furnace temperature measurement system for thermal power generation units according to claim 4, characterized in that: Also includes a display module; The display module includes a display LCD, a storage module, and a furnace temperature trend configuration module; The input end of the storage module is connected to the output end of the interface circuit, the output end of the storage module is connected to the input end of the furnace temperature trend configuration module, and the output end of the furnace temperature trend configuration module is connected to the display LCD; The furnace temperature trend configuration module is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit; The LCD display is used to display a historical curve or a real-time curve of the furnace temperature of the thermal power unit.

6. The multi-sensor based furnace temperature measurement system for thermal power generation units according to claim 5, characterized in that: The furnace temperature trend configuration module includes a central processing unit (CPU) and a graphics processing unit (GPU); The output end of the storage module is connected to the input end of the central processing unit (CPU), and the output end of the central processing unit (CPU) is connected to the display (LCD) via the graphics processing unit (GPU); The central processing unit CPU is used to generate a historical curve graph or a real-time curve graph of the furnace temperature of the thermal power unit.

7. The multi-sensor based furnace temperature measurement system for thermal power generation units according to claim 1, characterized in that: The data acquisition module is connected to the furnace temperature measurement module via a twisted pair cable and uses the CAN bus protocol for data transmission; The sensor module is also connected to the data acquisition module via a twisted pair cable.

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