阅读说明：本技术 一种燃煤系统的煤粉输送管中煤粉流量检测装置及检测方法 (Device and method for detecting coal powder flow in coal powder delivery pipe of coal-fired system ) 是由 童红政 袁岑颉 宋振明 金仲文 沙万里 田好雨 高峰 于 2021-08-16 设计创作，主要内容包括：本发明公开了一种燃煤系统的煤粉输送管中煤粉流量检测装置及检测方法,包括：上位机、微波信号发射模块、发射链路信号调节模块、微波开关矩阵、微波成像传感器、接收链路信号调节模块、信号检测模块、数据采集器；其中,上位机、微波信号发射模块、发射链路信号调节模块、微波开关矩阵、接收链路信号调节模块、信号检测模块和数据采集器依次电连接,所述微波开关矩阵与微波成像传感器电连接。本发明的燃煤系统的煤粉输送管中煤粉流量检测装置及检测方法使用方便,通过检测装置及其配套的检测方法,能够在线监测燃煤电厂煤粉输送管中的煤粉流量,及时发现运行中煤粉输送管中煤粉输送的异常情况。(The invention discloses a device and a method for detecting the flow of coal powder in a coal powder delivery pipe of a coal-fired system, wherein the device comprises the following components: the system comprises an upper computer, a microwave signal transmitting module, a transmitting link signal adjusting module, a microwave switch matrix, a microwave imaging sensor, a receiving link signal adjusting module, a signal detecting module and a data acquisition unit; the system comprises an upper computer, a microwave signal transmitting module, a transmitting link signal adjusting module, a microwave switch matrix, a receiving link signal adjusting module, a signal detecting module and a data acquisition unit, wherein the upper computer, the microwave signal transmitting module, the transmitting link signal adjusting module, the microwave switch matrix, the receiving link signal adjusting module, the signal detecting module and the data acquisition unit are electrically connected in sequence, and the microwave switch matrix is electrically connected with a microwave imaging sensor. The device and the method for detecting the flow of the coal powder in the coal powder conveying pipe of the coal-fired system are convenient to use, and can monitor the flow of the coal powder in the coal powder conveying pipe of a coal-fired power plant on line and find out the abnormal condition of the coal powder conveying in the coal powder conveying pipe in time during operation through the detection device and the matched detection method thereof.)

1. A coal powder flow detection device in a coal powder delivery pipe of a coal burning system is characterized by comprising:

the upper computer (1) is used for a main control component;

a microwave signal transmitting module (2) for transmitting a microwave signal of a specified frequency;

a transmission link signal conditioning module (3) for processing the microwave signal transmitted from the microwave signal transmitting module (2);

the microwave switch matrix (4) is used for realizing a component for connecting a microwave signal with a transmitting end and a receiving end of the sensor;

a microwave imaging sensor (5) for transmitting the processed microwave signal and receiving the returned microwave signal;

a receive link signal conditioning module (6) for processing components of the return signal from the microwave imaging sensor;

the signal detection module (7) is used for detecting the dimension or the phase of the microwave signal received by the receiving end and sending a test result to a component of the data acquisition unit;

a data collector (8) for collecting data;

the system comprises an upper computer (1), a microwave signal transmitting module (2), a transmitting link signal adjusting module (3), a microwave switch matrix (4), a receiving link signal adjusting module (6), a signal detecting module (7) and a data collector (8), wherein the upper computer is electrically connected with the microwave signal transmitting module (2), the transmitting link signal adjusting module (3), the microwave switch matrix (4), the receiving link signal adjusting module (6), the signal detecting module (7) and the data collector (8) in sequence, and the microwave switch matrix (4) is electrically connected with a microwave imaging sensor (5);

the upper computer (1) is a PC.

2. The device for detecting the flow rate of the pulverized coal in the pulverized coal conveying pipe of the coal burning system according to claim 1, wherein: the microwave imaging sensor (5) is arranged on the pulverized coal conveying pipe through a flange.

3. The device for detecting the flow rate of the pulverized coal in the pulverized coal conveying pipe of the coal burning system according to claim 1, wherein: the microwave imaging sensor (5) comprises a pipe wall, an insulating layer and a plurality of electrodes arranged in the pipe wall.

4. The device for detecting the flow rate of the pulverized coal in the pulverized coal conveying pipe of the coal burning system according to claim 1, wherein: the upper computer (1) is provided with a display screen.

5. The method for detecting the pulverized coal flow rate detecting device in the pulverized coal conveying pipe of the coal burning system according to claims 1 to 4, characterized by comprising the steps of:

step S1: the upper computer (1) controls the microwave signal transmitting module (2) to transmit a microwave signal with specified frequency to the transmitting link signal adjusting module (3);

step S2: after the microwave signals are amplified, attenuated, filtered and the like through the transmitting link signal adjusting module (3), the microwave signals are connected to a signal transmitting end and a signal receiving end in a microwave imaging sensor (5) through a microwave switch matrix (4);

step S3: microwave signals received by a receiving end of the microwave switch matrix (4) are sent to a receiving link signal adjusting module (6);

step S4: through signal detection processing of a receiving link signal adjusting module (6), microwave signals reach a signal detecting module (7) in the form of digital signals;

step S5: the signal detection module (7) transmits the measurement result to the data acquisition unit (8), and the data acquisition unit (8) sends the data to the upper computer (1).

Technical Field

The invention relates to the technical field of pulverized coal flow detection, in particular to a pulverized coal flow detection device and a pulverized coal flow detection method in a pulverized coal conveying pipe of a coal-fired system.

Background

Coal-fired power generation is an important way for obtaining electric energy in China, and a large coal-fired unit generally adopts a direct-fired pulverizing system, namely a coal mill conveys coal powder to a boiler burner for combustion through 4-8 primary air coal powder pipelines. In the whole coal burning process, the conveying quality of the pulverized coal in unit time is one of important indexes influencing the combustion efficiency of the boiler.

If the coal powder amount is distributed evenly in the pipeline transportation and the difference is not large, the combustion condition is even, the water wall pipe of the boiler chamber is heated evenly, and the phenomenon of pipeline burst caused by overheating of part of the pipe wall is not easy to happen; if the concentration distribution of the pulverized coal sprayed by a certain pulverized coal feeding pipeline is uneven and the difference is large, the flame group can deviate, the wall pipe at the deviation position of the flame group can be overheated under serious conditions, pipe explosion can occur, accidents are caused, and serious potential safety hazards exist. And if the pulverized coal is distributed unevenly, the combustion condition is unstable, the emission of NOx is increased, the carbon content of fly ash is high, slag bonding is easy to occur in the boiler, and the safe operation of the boiler is greatly damaged.

At present, the problem that the flow rate of the pulverized coal in a pulverized coal conveying pipe cannot be reflected in a real-time numerical and graphical mode exists.

Based on the situation, the invention provides a device and a method for detecting the flow of coal powder in a coal powder conveying pipe of a coal-fired system, and the device and the method can effectively solve the problems.

Disclosure of Invention

The invention aims to provide a device and a method for detecting the flow of coal powder in a coal powder conveying pipe of a coal burning system. The device and the method for detecting the coal powder flow in the coal powder conveying pipe of the coal-fired system are convenient to use, can monitor the coal powder flow in the coal powder conveying pipe of a coal-fired power plant on line through the detection device and the detection method matched with the detection device, find abnormal conditions of coal powder conveying in the coal powder conveying pipe in operation in time, such as problems of uneven distribution, overhigh or overlow concentration, different air powder uniformity in each coal powder burner and the like, and make the prediction of combustion working conditions possible by using the detected information. Achieving optimal combustion in a boiler requires precise control of the air flow and pulverized coal flow into each burner, and one key factor in such control is the ability to accurately measure the pulverized coal flow into the boiler in real time. The microwave tomography technology can measure the amount of the pulverized coal entering the boiler in real time, master the conveying dynamics of the pulverized coal, and obtain an ideal air-coal ratio by adjusting the air intake, thereby achieving higher combustion rate and being beneficial to the energy conservation and emission reduction of a thermal power plant.

The invention is realized by the following technical scheme:

a coal powder flow detection device in a coal powder delivery pipe of a coal burning system comprises:

the upper computer is used for a main control component;

a microwave signal transmitting module for transmitting a microwave signal of a designated frequency;

the transmitting link signal adjusting module is used for processing a microwave signal sent by the microwave signal transmitting module;

the microwave switch matrix is used for realizing a component for connecting a microwave signal with a transmitting end and a receiving end of the sensor;

a microwave imaging sensor for transmitting the processed microwave signal and receiving the returned microwave signal;

a receive link signal conditioning module, a component for processing the return signal from the microwave imaging sensor;

the signal detection module is used for detecting the dimension or the phase of the microwave signal received by the receiving end and sending a test result to a component of the data acquisition unit;

the data acquisition device is used for acquiring data;

the system comprises an upper computer, a microwave signal transmitting module, a transmitting link signal adjusting module, a microwave switch matrix, a receiving link signal adjusting module, a signal detecting module and a data acquisition unit, wherein the upper computer, the microwave signal transmitting module, the transmitting link signal adjusting module, the microwave switch matrix, the receiving link signal adjusting module, the signal detecting module and the data acquisition unit are electrically connected in sequence, and the microwave switch matrix is electrically connected with a microwave imaging sensor.

The invention aims to provide a device and a method for detecting the flow of coal powder in a coal powder conveying pipe of a coal burning system. The device and the method for detecting the coal powder flow in the coal powder conveying pipe of the coal-fired system are convenient to use, can monitor the coal powder flow in the coal powder conveying pipe of a coal-fired power plant on line through the detection device and the detection method matched with the detection device, find abnormal conditions of coal powder conveying in the coal powder conveying pipe in operation in time, such as problems of uneven distribution, overhigh or overlow concentration, different air powder uniformity in each coal powder burner and the like, and make the prediction of combustion working conditions possible by using the detected information. Achieving optimal combustion in a boiler requires precise control of the air flow and pulverized coal flow into each burner, and one key factor in such control is the ability to accurately measure the pulverized coal flow into the boiler in real time. The microwave tomography technology can measure the amount of the pulverized coal entering the boiler in real time, master the conveying dynamics of the pulverized coal, and obtain an ideal air-coal ratio by adjusting the air intake, thereby achieving higher combustion rate and being beneficial to the energy conservation and emission reduction of a thermal power plant.

Preferably, the microwave imaging sensor is arranged on the pulverized coal conveying pipe through a flange.

Preferably, the microwave imaging sensor comprises a pipe wall, an insulating layer and a plurality of electrodes arranged in the pipe wall.

Preferably, the upper computer is provided with a display screen.

Preferably, the upper computer is a PC.

According to another aspect of the present invention, there is provided a method for detecting a pulverized coal flow rate in a pulverized coal conveying pipe of a coal burning system, comprising the steps of:

step S1: the upper computer controls the microwave signal transmitting module to transmit a microwave signal with specified frequency to the transmitting link signal adjusting module;

step S2: after the microwave signals are amplified, attenuated, filtered and the like through the transmitting link signal adjusting module, the microwave signals are connected to a signal transmitting end and a signal receiving end in a microwave imaging sensor through a microwave switch matrix;

step S3: microwave signals received by a receiving end of the microwave switch matrix are sent to a receiving link signal adjusting module;

step S4: after signal detection processing of the receiving link signal adjusting module, the microwave signal reaches the signal detection module in the form of a digital signal;

step S5: the signal detection module transmits the measurement result to the data acquisition unit, and the data acquisition unit transmits the data to the upper computer.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the device and the method for detecting the coal powder flow in the coal powder conveying pipe of the coal-fired system are convenient to use, can monitor the coal powder flow in the coal powder conveying pipe of a coal-fired power plant on line through the detection device and the detection method matched with the detection device, find abnormal conditions of coal powder conveying in the coal powder conveying pipe in operation in time, such as problems of uneven distribution, overhigh or overlow concentration, different air powder uniformity in each coal powder burner and the like, and make the prediction of combustion working conditions possible by using the detected information. Achieving optimal combustion in a boiler requires precise control of the air flow and pulverized coal flow into each burner, and one key factor in such control is the ability to accurately measure the pulverized coal flow into the boiler in real time. The microwave tomography technology can measure the amount of the pulverized coal entering the boiler in real time, master the conveying dynamics of the pulverized coal, and obtain an ideal air-coal ratio by adjusting the air intake, thereby achieving higher combustion rate and being beneficial to the energy conservation and emission reduction of a thermal power plant.

Drawings

Fig. 1 is a schematic structural diagram of the detection device of the present invention.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Technical features (components/elements of the invention) of the upper computer, the microwave signal transmitting module, the transmitting link signal adjusting module, the microwave switch matrix, the microwave imaging sensor, the receiving link signal adjusting module, the signal detecting module, the data acquisition unit and the like are all obtained from conventional commercial approaches or manufactured by conventional methods if no special description is provided, and the specific structure, the working principle, the control mode and the spatial arrangement mode which may be involved adopt conventional selection in the field, which should not be regarded as innovation points of the invention, and for technical personnel in the field, the invention can be understood without further detailed development.

Example 1:

as shown in fig. 1, the present invention provides a coal powder flow rate detecting device in a coal powder delivery pipe of a coal burning system, comprising:

the upper computer 1 is used for main control components; the main functions of the upper computer 1 include providing a user interface, a control system, data transmission and processing, running data recording, and the like.

A microwave signal transmitting module 2 for transmitting a microwave signal of a designated frequency; the microwave signal transmitting module 2 mainly provides microwave signals required by detection, can be single fixed frequency or multiple variable frequencies, and can control indexes such as frequency, power and the like of transmitted signals through programs of the upper computer 1.

A transmission link signal adjusting module 3, a component for processing the microwave signal transmitted from the microwave signal transmitting module 2; the transmission link signal conditioning module 3 is mainly used for processing the microwave signal of the transmission part, and the main functions include: amplification, attenuation, filtering, characteristic impedance matching, etc.

The microwave switch matrix 4 is a component for realizing connection between a microwave signal and a transmitting end and a receiving end of the sensor; the microwave switch matrix 4 is mainly used for realizing the connection between the transmitting end and the receiving end of the microwave signal to the sensor electrode. All measurement data required by microwave imaging image reconstruction are obtained by controlling the microwave switch matrix 4 to transform a signal path.

A microwave imaging sensor 5 for transmitting the processed microwave signal and receiving the returned microwave signal; the microwave imaging sensor can realize the connection of the electrode and the transmitting end or the receiving end of the microwave signal by controlling the control of the microwave switch matrix 4. The metal pipe wall of the outer layer is used as mechanical protection and mechanical support of the sensor, the electrodes are isolated from the metal pipe wall by insulating layers, and the electrodes can be respectively connected to signal connection ports outside the metal pipe wall.

A receive link signal conditioning module 6, a means for processing the return signal from the microwave imaging sensor; the receive chain signal conditioning module 6 is mainly used to process the return signal from the microwave imaging sensor 5, and the signal is passed through the detection module, effectively converting the AC signal to a DC signal.

The signal detection module 7 is used for detecting the dimension or the phase of the microwave signal received by the receiving end and sending a test result to a component of the data acquisition unit 8;

a data collector 8 for data collection components; the data acquisition unit 8 performs high-speed data acquisition of digital quantity and analog quantity on the microwave signal receiving and detecting part, sends acquired data to the upper computer 1, and simultaneously receives a control signal of the upper computer 1 to selectively acquire required data.

The microwave imaging system comprises an upper computer 1, a microwave signal transmitting module 2, a transmitting link signal adjusting module 3, a microwave switch matrix 4, a receiving link signal adjusting module 6, a signal detecting module 7 and a data acquisition unit 8, wherein the upper computer, the microwave signal transmitting module 2, the transmitting link signal adjusting module 3, the microwave switch matrix 4, the receiving link signal adjusting module 6, the signal detecting module 7 and the data acquisition unit 8 are electrically connected in sequence, and the microwave switch matrix 4 is electrically connected with a microwave imaging sensor 5.

According to another aspect of the present invention, there is provided a method for detecting a pulverized coal flow rate in a pulverized coal conveying pipe of a coal burning system, comprising the steps of:

step S1: the upper computer 1 controls the microwave signal transmitting module 2 to send a microwave signal with specified frequency to the transmitting link signal adjusting module 3;

step S2: after the microwave signals are amplified, attenuated, filtered and the like by the transmitting link signal adjusting module 3, the microwave signals are connected to a signal transmitting end and a signal receiving end in a microwave imaging sensor 5 through a microwave switch matrix 4;

through the control of the microwave switch matrix 4, the transmitting end can be connected to any one electrode of the microwave imaging sensor 5, while the receiving end is connected to another any electrode of the microwave imaging sensor 5. In the microwave imaging sensor 5, the path of the microwave signal through the measured substance starts from the electrode connected to the transmitting terminal and ends at the electrode connected to the receiving terminal.

Step S3: microwave signals received by the receiving end of the microwave switch matrix 4 are sent to a receiving link signal adjusting module 6;

step S4: after signal detection processing of the receiving link signal adjusting module 6, the microwave signal reaches the signal detecting module 7 in the form of a digital signal;

step S5: the signal detection module 7 transmits the measurement result to the data acquisition unit 8, and the data acquisition unit 8 transmits the data to the upper computer 1.

The upper computer 1 calculates the distribution condition of the relative dielectric constant in the measured area by using a microwave imaging image reconstruction algorithm according to all data of a measuring period of microwave imaging. Due to the fact that the dielectric constant of air in the coal powder conveying pipe is different from that of coal powder, the system can achieve the function of detecting the mass flow of the coal powder in the coal powder conveying pipe in real time by combining the known coal powder flow speed data in the coal powder conveying pipe.

The microwave imaging sensor 5 is connected to the middle section of the coal powder conveying pipe in a flange connection mode, the detection system calculates the real-time flow of the coal powder conveying pipe through the difference value of the area test results between the transmitting end and the receiving end when the coal powder conveying system of the coal mill normally operates and stops operating, and real-time distribution image imaging of coal powder between the transmitting end and the receiving end is achieved.

Example 2:

as shown in fig. 1, the present invention provides a coal powder flow rate detecting device in a coal powder delivery pipe of a coal burning system, comprising:

the upper computer 1 is used for main control components; the main functions of the upper computer 1 include providing a user interface, a control system, data transmission and processing, running data recording, and the like.

A microwave signal transmitting module 2 for transmitting a microwave signal of a designated frequency; the microwave signal transmitting module 2 mainly provides microwave signals required by detection, can be single fixed frequency or multiple variable frequencies, and can control indexes such as frequency, power and the like of transmitted signals through programs of the upper computer 1.

A transmission link signal adjusting module 3, a component for processing the microwave signal transmitted from the microwave signal transmitting module 2; the transmission link signal conditioning module 3 is mainly used for processing the microwave signal of the transmission part, and the main functions include: amplification, attenuation, filtering, characteristic impedance matching, etc.

The microwave switch matrix 4 is a component for realizing connection between a microwave signal and a transmitting end and a receiving end of the sensor; the microwave switch matrix 4 is mainly used for realizing the connection between the transmitting end and the receiving end of the microwave signal to the sensor electrode. All measurement data required by microwave imaging image reconstruction are obtained by controlling the microwave switch matrix 4 to transform a signal path.

A microwave imaging sensor 5 for transmitting the processed microwave signal and receiving the returned microwave signal; the microwave imaging sensor can realize the connection of the electrode and the transmitting end or the receiving end of the microwave signal by controlling the control of the microwave switch matrix 4. The metal pipe wall of the outer layer is used as mechanical protection and mechanical support of the sensor, the electrodes are isolated from the metal pipe wall by insulating layers, and the electrodes can be respectively connected to signal connection ports outside the metal pipe wall.

A receive link signal conditioning module 6, a means for processing the return signal from the microwave imaging sensor; the receive chain signal conditioning module 6 is mainly used to process the return signal from the microwave imaging sensor 5, and the signal is passed through the detection module, effectively converting the AC signal to a DC signal.

The signal detection module 7 is used for detecting the dimension or the phase of the microwave signal received by the receiving end and sending a test result to a component of the data acquisition unit 8;

a data collector 8 for data collection components; the data acquisition unit 8 performs high-speed data acquisition of digital quantity and analog quantity on the microwave signal receiving and detecting part, sends acquired data to the upper computer 1, and simultaneously receives a control signal of the upper computer 1 to selectively acquire required data.

The microwave imaging system comprises an upper computer 1, a microwave signal transmitting module 2, a transmitting link signal adjusting module 3, a microwave switch matrix 4, a receiving link signal adjusting module 6, a signal detecting module 7 and a data acquisition unit 8, wherein the upper computer, the microwave signal transmitting module 2, the transmitting link signal adjusting module 3, the microwave switch matrix 4, the receiving link signal adjusting module 6, the signal detecting module 7 and the data acquisition unit 8 are electrically connected in sequence, and the microwave switch matrix 4 is electrically connected with a microwave imaging sensor 5.

Further, in another embodiment, the microwave imaging sensor 5 is arranged on the pulverized coal conveying pipe through a flange.

Further, in another embodiment, the microwave imaging sensor 5 comprises a pipe wall, an insulating layer, and a plurality of electrodes disposed within the pipe wall.

The microwave imaging sensor 5 mainly comprises a plurality of induction electrodes which are uniformly distributed on the inner wall of the microwave imaging sensor 5, and non-invasive detection is adopted, so that the flatness of the inner surfaces of the sensor tube and the raw coal powder tube can be kept, the flow of coal powder is not influenced, and the abrasion of the coal powder to the sensor equipment is also avoided.

Further, in another embodiment, the upper computer 1 is provided with a display screen.

Further, in another embodiment, the upper computer 1 is a PC.

According to another aspect of the present invention, there is provided a method for detecting a pulverized coal flow rate in a pulverized coal conveying pipe of a coal burning system, comprising the steps of:

step S1: the upper computer 1 controls the microwave signal transmitting module 2 to send a microwave signal with specified frequency to the transmitting link signal adjusting module 3;

step S2: after the microwave signals are amplified, attenuated, filtered and the like by the transmitting link signal adjusting module 3, the microwave signals are connected to a signal transmitting end and a signal receiving end in a microwave imaging sensor 5 through a microwave switch matrix 4;

through the control of the microwave switch matrix 4, the transmitting end can be connected to any one electrode of the microwave imaging sensor 5, while the receiving end is connected to another any electrode of the microwave imaging sensor 5. In the microwave imaging sensor 5, the path of the microwave signal through the measured substance starts from the electrode connected to the transmitting terminal and ends at the electrode connected to the receiving terminal.

Step S3: microwave signals received by the receiving end of the microwave switch matrix 4 are sent to a receiving link signal adjusting module 6;

step S4: after signal detection processing of the receiving link signal adjusting module 6, the microwave signal reaches the signal detecting module 7 in the form of a digital signal;

step S5: the signal detection module 7 transmits the measurement result to the data acquisition unit 8, and the data acquisition unit 8 transmits the data to the upper computer 1.

The upper computer 1 calculates the distribution condition of the relative dielectric constant in the measured area by using a microwave imaging image reconstruction algorithm according to all data of a measuring period of microwave imaging. Due to the fact that the dielectric constant of air in the coal powder conveying pipe is different from that of coal powder, the system can achieve the function of detecting the mass flow of the coal powder in the coal powder conveying pipe in real time by combining the known coal powder flow speed data in the coal powder conveying pipe.

The microwave imaging sensor 5 is connected to the middle section of the coal powder conveying pipe in a flange connection mode, the detection system calculates the real-time flow of the coal powder conveying pipe through the difference value of the area test results between the transmitting end and the receiving end when the coal powder conveying system of the coal mill normally operates and stops operating, and real-time distribution image imaging of coal powder between the transmitting end and the receiving end is achieved.

According to the measurement data of one period of the fault scanning imaging of the microwave imaging sensor 5 in the detection range, target information is mined and extracted from the scattering echo signals by utilizing a microwave imaging image reconstruction algorithm, the target characteristics are reconstructed, the distribution condition of the relative dielectric constant between the transmitting end and the receiving end of the tested pulverized coal conveying pipe can be obtained due to the difference between the dielectric constant of air and pulverized coal, the relationship between the sensor sensing data and the image and the real-time flow of the pulverized coal is established in a non-contact mode, and the requirement of industrial real-time online detection is met. According to the distribution condition of the coal powder in the measuring area, the coal powder mass flow detection function of the coal powder conveying pipe in the coal-fired system can be realized by combining the known coal powder flow velocity data in the coal powder conveying pipe.

According to the description and the drawings of the invention, the device and the method for detecting the flow rate of the coal powder in the coal powder conveying pipe of the coal burning system can be easily manufactured or used by the skilled person, and can generate the positive effects recorded in the invention.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.