Diversified measurement system for wind-powder mixture

Abstract

The invention discloses a wind-powder mixture diversified measurement system, and particularly relates to the field of wind-powder mixture measurement, the wind-powder mixture diversified measurement system comprises a data acquisition module, an analysis and judgment module, a classification and division module and a summarization and analysis module, and all the modules are connected through signals; the data acquisition module acquires a speed parameter and a concentration parameter of a wind powder mixture, generates a parameter acquisition signal and sends the parameter acquisition signal to the analysis and judgment module; the analysis and judgment module normalizes the speed parameter and the concentration parameter according to the received speed parameter and concentration parameter information to obtain a judgment parameter, evaluates the wind-powder mixture by using the judgment parameter, generates a judgment parameter signal and sends the judgment parameter signal to the classification and division module; the classification and division module sets a judgment parameter signal threshold value and compares the judgment parameter signal with the judgment parameter signal threshold value. The air powder mixture can be accurately measured, the emission concentration can be greatly reduced, and pollution of power plant emission to the environment is relieved.

Description

Technical Field

[0001] The present invention relates to the field of wind-powder mixture measurement, and more particularly to a wind-powder mixture diversified measurement system. Background Art

[0002] At present, thermal power plants generally grind coal blocks into pulverized coal in coal mills and finally send them to boilers for combustion. The air supply used to carry pulverized coal into the boiler in thermal power plants is called primary air. The wind speed and pulverized coal concentration in the primary air duct during operation are important parameters that affect the stability of the combustion conditions in the boiler and the combustion efficiency of the boiler. The inconsistency of the flow rate and pulverized coal concentration in the primary air ducts on the same layer will have a series of adverse effects on the operation of the boiler. These adverse effects are mainly manifested in the deflection of the combustion circle in the furnace, the flame sticking to the wall, the uneven heat load of the furnace cavity, the large temperature deviation, the increase of emissions, the local overheating of the water-cooled wall, the coking phenomenon, the thermal deviation of the superheater and reheater, and the flameout of the boiler and the accident. Accurate measurement and control of air distribution and pulverized coal concentration at all levels can greatly reduce the emission concentration and reduce the pollution of power plant emissions to the environment.

[0003] However, the current measurement accuracy of air-powder mixture is low, which will increase the emission concentration and aggravate the environmental pollution caused by power plant emissions.

[0004] In order to solve the above problems, a technical solution is now provided. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a diversified measurement system for an air-powder mixture to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wind-powder mixture diversified measurement system includes a data acquisition module, an analysis and judgment module, a classification module, and a summary and analysis module, and each module is connected by a signal;

[0008] The data acquisition module collects the speed parameters and concentration parameters of the air-powder mixture respectively, and generates a parameter acquisition signal to be sent to the analysis and judgment module;

[0009] The analysis and judgment module normalizes the speed parameter and the concentration parameter according to the received speed parameter and concentration parameter information to obtain the judgment parameter, uses the judgment parameter to evaluate the air-powder mixture, and generates a judgment parameter signal to send to the classification module;

[0010] The classification module sets a judgment parameter signal threshold, compares the judgment parameter signal with the judgment parameter signal threshold, generates a normal signal or an abnormal signal according to the comparison result, and sends the generated normal signal or abnormal signal to the summary analysis module;

[0011] The summary and analysis module summarizes and analyzes the abnormal signals, sets an abnormal signal threshold, compares the abnormal signals with the abnormal signal threshold, and adjusts the speed parameters and concentration parameters of the wind-powder mixture according to the comparison results.

[0012] In a preferred embodiment, the operation of the data acquisition module specifically includes the following:

[0013] The speed sensor is used to collect the speed parameters of the air-powder mixture, and the concentration sensor is used to collect the concentration parameters of the air-powder mixture, and a parameter collection signal is generated and sent to the analysis and judgment module.

[0014] In a preferred embodiment, the analysis and judgment module operation specifically includes the following contents:

[0015] Step a1: mark the velocity parameter as V and the concentration parameter as C;

[0016] Step a2: Normalize the speed parameter and the concentration parameter to obtain the judgment parameter expression:

[0017]

[0018] Wherein, PD is the judgment parameter, a1 and a2 are the proportional coefficients of the speed parameter and the concentration parameter, respectively, and a1>a2>0.

[0019] In a preferred embodiment, the classification module operation specifically includes the following contents:

[0020] Step b1: mark the judgment parameter signal threshold as PD1, and compare the judgment parameter PD with the judgment parameter signal threshold PD1;

[0021] Step b2: if PD<PD1, generate a normal signal;

[0022] Step b3: if PD ≥ PD1, generate an abnormal signal;

[0023] Step b4: Send the generated normal signal or abnormal signal to the summary analysis module.

[0024] In a preferred embodiment, the summary analysis module operation includes the following specific contents:

[0025] Step c1: Mark the abnormal signal as YC, mark the abnormal signal thresholds as YC1 and YC2, and YC1<YC2;

[0026] Step c2: Compare the abnormal signal YC with the abnormal signal thresholds YC1 and YC2.

[0027] In a preferred embodiment, when the abnormal signal YC<abnormal signal threshold YC1<abnormal signal threshold YC2, a first-level warning signal is generated;

[0028] When the abnormal signal threshold YC1≤abnormal signal YC<abnormal signal threshold YC2, a secondary warning signal is generated;

[0029] When the abnormal signal threshold YC2 ≤ the abnormal signal YC, a third-level warning signal is generated.

[0030] In a preferred embodiment, when the first-level warning signal is generated, the speed and concentration of the air-powder mixture are adjusted in a small range until the first-level warning signal stops;

[0031] When the secondary warning signal is generated, the speed and concentration of the air-powder mixture are adjusted over a wide range until the secondary warning signal stops.

[0032] In a preferred embodiment, when a third-level warning signal is generated, shutdown maintenance is performed.

[0033] The technical effects and advantages of the wind-powder mixture diversified measurement system of the present invention are as follows:

[0034] 1. The speed parameters of the air-powder mixture are collected by the speed sensor, and the concentration parameters of the air-powder mixture are collected by the concentration sensor, so as to monitor the speed and concentration changes of the air-powder mixture in real time, normalize the speed parameters and concentration parameters to obtain the judgment parameters, and use the judgment parameters to evaluate the air-powder mixture, so as to facilitate and quickly evaluate the air-powder mixture, and send out corresponding signals in time to ensure the stability and accuracy of the evaluation process;

[0035] 2. By comparing the judgment parameter signal with the judgment parameter signal threshold, a normal signal or an abnormal signal is generated according to the comparison result, and the abnormal signal is compared with the abnormal signal threshold. The speed parameter and concentration parameter of the air-powder mixture are adjusted according to the comparison result. In this way, the air-powder mixture can be accurately measured, the emission concentration can be greatly reduced, and the pollution of the environment caused by power plant emissions can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a schematic structural diagram of a wind-powder mixture diversified measurement system. DETAILED DESCRIPTION

[0037] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Figure 1 The invention provides a wind-powder mixture diversified measurement system, including a data acquisition module, an analysis and judgment module, a classification module, and a summary and analysis module, wherein each module is connected through a signal;

[0040] The data acquisition module collects the speed parameters and concentration parameters of the air-powder mixture respectively, and generates a parameter acquisition signal to be sent to the analysis and judgment module;

[0041] The analysis and judgment module normalizes the speed parameter and the concentration parameter according to the received speed parameter and concentration parameter information to obtain the judgment parameter, uses the judgment parameter to evaluate the air-powder mixture, and generates a judgment parameter signal to send to the classification module;

[0042] The classification module sets a judgment parameter signal threshold, compares the judgment parameter signal with the judgment parameter signal threshold, generates a normal signal or an abnormal signal according to the comparison result, and sends the generated normal signal or abnormal signal to the summary analysis module;

[0043] The summary and analysis module summarizes and analyzes the abnormal signals, sets an abnormal signal threshold, compares the abnormal signals with the abnormal signal threshold, and adjusts the speed parameters and concentration parameters of the wind-powder mixture according to the comparison results.

[0044] The operation of the data acquisition module specifically includes the following:

[0045] The speed sensor is used to collect the speed parameters of the air-powder mixture, and the concentration sensor is used to collect the concentration parameters of the air-powder mixture, and a parameter collection signal is generated and sent to the analysis and judgment module.

[0046] The speed sensor of this embodiment adopts a photoelectric speed sensor: including a light-transmitting type and a light-reflecting type sensor, which is mainly composed of a light-emitting diode and a photosensitive transistor. When the signal disk with a hole rotates, the light emitted by the light-emitting diode intermittently shines on the photosensitive transistor, and the photosensitive transistor is extremely sensitive to light; when there is light, the photosensitive diode generates voltage; when the light is blocked, the voltage is 0;

[0047] The concentration sensor of this embodiment works by measuring the concentration of components in the mobile phase, requiring the mobile phase flow rate to remain stable and constant because the peak area is inversely proportional to the mobile phase flow rate, converting the change in substance concentration into a measurable electrical signal for quantitative or qualitative analysis.

[0048] The analysis and judgment module operation specifically includes the following contents:

[0049] Step a1: mark the velocity parameter as V and the concentration parameter as C;

[0050] Step a2: Normalize the speed parameter and the concentration parameter to obtain the judgment parameter expression:

[0051]

[0052] Wherein, PD is the judgment parameter, a1 and a2 are the proportional coefficients of the speed parameter and the concentration parameter, respectively, and a1>a2>0.

[0053] The smaller the value of the judgment parameter PD is, the better the transmission state of the air-powder mixture is. The larger the value of the judgment parameter PD is, the worse the transmission state of the air-powder mixture is.

[0054] The operation of the classification module specifically includes the following:

[0055] Step b1: mark the judgment parameter signal threshold as PD1, and compare the judgment parameter PD with the judgment parameter signal threshold PD1;

[0056] Step b2: if PD<PD1, generate a normal signal;

[0057] Step b3: if PD ≥ PD1, generate an abnormal signal;

[0058] Step b4: Send the generated normal signal or abnormal signal to the summary analysis module.

[0059] When an abnormal signal is generated, it means that the transmission state of the air-powder mixture is poor, which will increase the emission concentration and aggravate the environmental pollution caused by power plant emissions.

[0060] The operation of the summary analysis module includes the following specific contents:

[0061] Step c1: Mark the abnormal signal as YC, mark the abnormal signal thresholds as YC1 and YC2, and YC1<YC2;

[0062] Step c2: Compare the abnormal signal YC with the abnormal signal thresholds YC1 and YC2.

[0063] When the abnormal signal YC is less than the abnormal signal threshold YC1 and less than the abnormal signal threshold YC2, a first-level warning signal is generated;

[0064] When the abnormal signal threshold YC1≤abnormal signal YC<abnormal signal threshold YC2, a secondary warning signal is generated;

[0065] When the abnormal signal threshold YC2 ≤ the abnormal signal YC, a third-level warning signal is generated.

[0066] When the first-level warning signal is generated, the speed and concentration of the air-powder mixture are adjusted in a small range until the first-level warning signal stops;

[0067] When the secondary warning signal is generated, the speed and concentration of the air-powder mixture are adjusted over a wide range until the secondary warning signal stops.

[0068] When a third-level warning signal is generated, the machine will be shut down for maintenance.

[0069] When a level one warning signal is generated, it means that the transmission state of the wind-powder mixture is close to the normal value. At this time, it is only necessary to adjust the speed and concentration of the wind-powder mixture in a small range until the level one warning signal stops. When a level two warning signal is generated, it means that the transmission state of the wind-powder mixture is slightly far from the normal value. At this time, it is necessary to adjust the speed and concentration of the wind-powder mixture in a large range until the level two warning signal stops. If it subsequently becomes a level one warning signal, it is necessary to continue to adjust the speed and concentration of the wind-powder mixture in a small range until the level one warning signal stops. When a level three warning signal is generated, it means that the transmission state of the wind-powder mixture is far from the normal value and shutdown maintenance is required. The wind-powder mixture can be accurately measured, which can greatly reduce the emission concentration and reduce the pollution of the environment by power plant emissions.

[0070] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0071] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0072] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0073] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0074] In the several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0077] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0079] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind-powder mixture diversified measurement system, characterized in that: It includes data collection module, analysis and judgment module, classification module, summary and analysis module, and each module is connected through signals; The data acquisition module collects the speed parameters and concentration parameters of the air-powder mixture respectively, and generates a parameter acquisition signal to be sent to the analysis and judgment module; The analysis and judgment module normalizes the speed parameter and the concentration parameter according to the received speed parameter and concentration parameter information to obtain the judgment parameter, uses the judgment parameter to evaluate the air-powder mixture, and generates a judgment parameter signal to send to the classification module; The classification module sets a judgment parameter signal threshold, compares the judgment parameter signal with the judgment parameter signal threshold, generates a normal signal or an abnormal signal according to the comparison result, and sends the generated normal signal or abnormal signal to the summary analysis module; The summary and analysis module summarizes and analyzes the abnormal signals, sets an abnormal signal threshold, compares the abnormal signals with the abnormal signal threshold, and adjusts the speed parameters and concentration parameters of the wind-powder mixture according to the comparison results.

2. A wind-powder mixture diversified measurement system according to claim 1, characterized in that: The operation of the data acquisition module specifically includes the following: The speed sensor is used to collect the speed parameters of the air-powder mixture, and the concentration sensor is used to collect the concentration parameters of the air-powder mixture, and a parameter collection signal is generated and sent to the analysis and judgment module.

3. A wind-powder mixture diversified measurement system according to claim 1, characterized in that: The analysis and judgment module operation specifically includes the following contents: Step a1: mark the velocity parameter as V and the concentration parameter as C; Step a2: Normalize the speed parameter and the concentration parameter to obtain the judgment parameter expression: Wherein, PD is the judgment parameter, a1 and a2 are the proportional coefficients of the speed parameter and the concentration parameter, respectively, and a1>a2>0.

4. A wind-powder mixture diversified measurement system according to claim 3, characterized in that: The operation of the classification module specifically includes the following: Step b1: mark the judgment parameter signal threshold as PD1, and compare the judgment parameter PD with the judgment parameter signal threshold PD1; Step b2: if PD<PD1, generate a normal signal; Step b3: if PD ≥ PD1, generate an abnormal signal; Step b4: Send the generated normal signal or abnormal signal to the summary analysis module.

5. A wind-powder mixture diversified measurement system according to claim 4, characterized in that: The operation of the summary analysis module includes the following specific contents: Step c1: Mark the abnormal signal as YC, mark the abnormal signal thresholds as YC1 and YC2, and YC1<YC2; Step c2: Compare the abnormal signal YC with the abnormal signal thresholds YC1 and YC2.

6. A wind-powder mixture diversified measurement system according to claim 5, characterized in that: When the abnormal signal YC is less than the abnormal signal threshold YC1 and less than the abnormal signal threshold YC2, a first-level warning signal is generated; When the abnormal signal threshold YC1≤abnormal signal YC<abnormal signal threshold YC2, a secondary warning signal is generated; When the abnormal signal threshold YC2 ≤ the abnormal signal YC, a third-level warning signal is generated.

7. A wind-powder mixture diversified measurement system according to claim 6, characterized in that: When the first-level warning signal is generated, the speed and concentration of the air-powder mixture are adjusted in a small range until the first-level warning signal stops; When the secondary warning signal is generated, the speed and concentration of the air-powder mixture are adjusted over a wide range until the secondary warning signal stops.

8. The wind-powder mixture diversified measurement system according to claim 6, characterized in that: When a third-level warning signal is generated, the machine will be shut down for maintenance.

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