Combustion data sampling system for variable coal type W flame boiler
By installing sampling pipelines and acoustic temperature measurement devices between the coal mill and the burner, the coal powder components are detected in real time and the combustion temperature is corrected, the problem of fluctuations in fluctuations in the coal-fired boiler when the coal type changes is changed, and accurate monitoring and evaluation of boiler combustion data is achieved.
Patent Information
- Application Number
- CN202421809302.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-07-29
AI Technical Summary
When existing coal-fired thermal power plants use deviated from the design coal type and the coal type changes frequently, it causes fluctuations in the combustion fluctuations in the furnace, making it difficult to achieve accurate flue gas monitoring and temperature measurement.
A sampling pipeline is installed between the coal mill and the burner, connecting the coal quality online detection device and the acoustic temperature measurement device, controlling the sampling process through an embedded ARM processor, detecting the coal powder composition in real time and correcting the acoustic temperature field after combustion, and building a combustion data sampling system.
It improves the accuracy of combustion data, reduces the hysteresis of flue gas component detection and the limitations of single-point measurement, and realizes a comprehensive evaluation of boiler combustion.
Smart Images
Figure CN223205179U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of boiler testing, and more specifically, relates to a combustion data sampling system for a variable coal type W flame boiler. Background Art
[0002] The types of coal used in many coal-fired power plants deviate from the designed types, and the types of coal often change, causing fluctuations in the composition of the flue gas emitted by the furnace combustion.
[0003] Therefore, it is necessary to develop a combustion data sampling system for variable coal W-flame boilers, whose sampling data is used as a reference for boiler flue gas monitoring and temperature measurement. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a combustion data sampling system for a variable coal type W-flame boiler.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a combustion data sampling system for a variable coal type W-flame boiler, comprising a coal mill and a burner, a pulverized coal pipeline connected between the coal mill and the burner, a sampling pipeline installed on the pulverized coal pipeline, the sampling pipeline being used to sample the pulverized coal to be burned in the pulverized coal pipeline, and the output end of the sampling pipeline being connected to an online coal quality detection device;
[0006] An acoustic wave transmitter and receiver is installed in the burner furnace, and the acoustic wave transmitter and receiver is connected to an industrial computer.
[0007] As the preferred technical solution of the present invention, six groups of pulverized coal pipelines are provided, which are respectively configured with six coal mills. The sampling pipelines are connected in parallel in the six groups of pulverized coal pipelines, and the sampling of the pipelines is located after the coal mill and before entering the furnace.
[0008] As the preferred technical solution of the present invention, it also includes a controller, which includes three communication control links, one CAN bus connected to the coal quality online detection device, and the other two connected to the DCS and the acoustic temperature measuring device respectively through RS485 circuits.
[0009] As the preferred technical solution of the present invention, the coal quality online detection device adopts a laser Li bs coal quality online detection device.
[0010] As a preferred technical solution of the present invention, an embedded ARM processor circuit and a delay circuit for control are provided in the controller.
[0011] As a preferred technical solution of the present utility model, the installation plane of the acoustic wave transmitter and receiver is higher than the input port of the pulverized coal pipeline.
[0012] The utility model provides a combustion data sampling system for a variable coal type W-flame boiler, which has the following beneficial effects:
[0013] Traditional control sampling systems incorporate an online coal quality detection module to monitor incoming coal quality. This addresses the significant fluctuations in flue gas composition caused by variable coal quality in coal-fired boilers, particularly W-flame coal-fired boilers. The present combustion data sampling system utilizes real-time incoming coal quality detection data to calibrate the acoustic temperature field detection results after combustion, improving the accuracy of comprehensive boiler combustion evaluations. Furthermore, sampling and analysis prior to pulverized coal combustion avoids the lag associated with flue gas composition detection at the furnace outlet and the localized nature of single-point measurement in existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall framework of the utility model.
[0015] Figure 2 This is a schematic diagram of the arrangement of the acoustic wave measuring points of the utility model.
[0016] Figure 3 This is the circuit diagram of the controller of this utility model. DETAILED DESCRIPTION
[0017] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0018] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the systems or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0019] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0020] See also Figures 1 to 3 The utility model provides a technical solution: a combustion data sampling system for a variable coal type W flame boiler, including a coal quality online detection module: including a sampling pipeline installed in a pulverized coal pipeline, the sampling pipeline is used to sample the pulverized coal in the pulverized coal pipeline and transport it to a coal quality detection and analysis unit, and the coal quality detection and analysis unit is used to detect the coal quality components of the sample;
[0021] Reference Figure 2 As shown in , in this embodiment, there are six groups of pulverized coal pipelines, and the sampling pipelines are connected in parallel in the six groups of pulverized coal pipelines, and the sampling of the pipelines is located after the pulverizer and before entering the furnace. It also includes a controller, see Figure 3 The controller is connected to the coal quality online detection device via a CAN bus, and is connected to the DCS and the acoustic temperature measurement device via two RS485 circuits. In other words, the controller contains three communication control links: one CAN bus is connected to the coal quality online detection device, and the other two are connected to the DCS and the acoustic temperature measurement device via RS485 circuits.
[0022] The controller is equipped with an embedded ARM processor circuit, a delay circuit, and a human-machine interface. The processor circuit performs overall control, including control of the sampling process. For example, when sampling using negative pressure, the processor circuit controls the opening and closing of the fan, while the delay circuit controls the sampling and detection steps.
[0023] The laser Libs online coal quality detection device is used to detect the composition of the fuel pulverized coal after the pulverizer and before entering the furnace, detect the content of elements such as N, H, C, S and water, and output and record the detection results.
[0024] In addition, an acoustic wave transmitter and receiver is installed in the burner furnace, and the acoustic wave transmitter and receiver is connected to the acoustic wave temperature measuring device. Figure 2 As shown in the figure, the installation plane of the acoustic wave transmitter and receiver is higher than the inlet of the pulverized coal pipeline. The acoustic wave data is used for acoustic temperature measurement.
[0025] In summary, this embodiment adds a pre-combustion pulverized coal sampling device and an acoustic wave device to the boiler system to provide data support for boiler flue gas composition and temperature detection.
[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A combustion data sampling system for a variable coal type W-flame boiler, characterized by: It includes a coal mill and a burner, a pulverized coal pipeline is connected between the coal mill and the burner, a sampling pipeline is installed on the pulverized coal pipeline, the sampling pipeline is used to sample the pulverized coal to be burned in the pulverized coal pipeline, and the output end of the sampling pipeline is connected to the coal quality online detection device; An acoustic wave transmitter and receiver is installed in the burner furnace, and the acoustic wave transmitter and receiver is connected to an industrial computer.
2. The combustion data sampling system for a variable coal type W-flame boiler according to claim 1, characterized in that: There are six groups of pulverized coal pipelines, each equipped with six coal mills. The sampling pipelines are connected in parallel in the six groups of pulverized coal pipelines, and the sampling of the pipelines is located after the coal mill and before entering the furnace.
3. The combustion data sampling system for a variable coal type W-flame boiler according to claim 1, characterized in that: It also includes a controller, which contains three communication control links. One CAN bus is connected to the coal quality online detection device, and the other two are connected to the DCS and the acoustic temperature measurement device through RS485 circuits.
4. The combustion data sampling system for a variable coal type W-flame boiler according to claim 1, characterized in that: The controller is equipped with an embedded ARM processor circuit for control, a delay circuit and a human-machine interface.
5. The combustion data sampling system for a variable coal type W-flame boiler according to claim 1, characterized in that: The coal quality online detection device adopts the laser Libs coal quality online detection device.
6. The combustion data sampling system for a variable coal type W-flame boiler according to claim 1, characterized in that: The installation plane of the acoustic wave transmitter and receiver is higher than the input port of the pulverized coal pipeline.