Anti-blocking control device for coal mill of coal-fired power generation unit

Abstract

The utility model discloses an anti-blocking control device for a coal mill of a coal-fired power generation unit. The anti-blocking control device for the coal mill of the coal-fired power generation unit comprises a pulverizing device and a control unit, the pulverizing device is connected with the control unit; the pulverizing device comprises a coal feeder and a coal mill; the coal feeder is connected with the coal mill; the coal mill is connected with the air pipe, the air control door and the air pressure assembly. The control unit comprises a control unit, a calculation unit and a display; the control unit is respectively connected with the calculation unit and the display. According to the utility model, the coal blockage of the coal mill is effectively prevented, so that the unit load response rate is realized for a power generation enterprise, and the unit stability and economy are improved. The technical problems that an existing coal mill optimization method needs large transformation investment, so that the transformation cost is too high, and the design budget is likely to be exceeded are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal-fired generator technology field especially relates to a coal-fired generator set coal mill anti -blocking control device. BACKGROUND

[0002] With wind energy, solar energy, nuclear energy and so on as the representative clean energy in the proportion of energy consumption in China is constantly improving, coal power generation capacity proportion is constantly declining, coal power will gradually change from the main power supply of power supply to the supporting and regulating power supply of power supply, and the safe and stable operation of coal power unit is particularly important. Coal-fired power plants use coal as fuel, and the machine that processes fuel is the coal mill of the pulverizing system. The running condition of the coal mill has a crucial influence on the safety, stability and economy of the unit.

[0003] Therefore, the existing technology usually optimizes the internal structure and working principle of the coal mill, improves the structure and material of the key components such as the grinding disc and the roller, and improves the wear resistance and anti-blocking capacity of the coal mill. However, the above optimization method requires a large modification investment, resulting in a large modification cost and easy to exceed the design budget. UTILITY MODEL CONTENT

[0004] The utility model provides a coal-fired generator set coal mill anti -blocking control device, solves the technical problem that the optimization method of the existing coal mill needs a large modification investment, resulting in a large modification cost and easy to exceed the design budget.

[0005] The coal-fired generator set coal mill anti-blocking control device provided by the utility model, the coal-fired generator set coal mill anti-blocking control device includes a pulverizing device and a control unit;

[0006] The pulverizing device and the control unit are connected;

[0007] The pulverizing device includes a coal feeder and a coal mill;

[0008] The coal feeder is connected with the coal mill;

[0009] The coal mill is connected with a wind pipe, a wind regulating door and a wind pressure assembly respectively;

[0010] The control unit includes a control unit, a calculation unit and a display;

[0011] The control unit is connected with the calculation unit and the display respectively.

[0012] Optionally, the wind pipe includes a hot primary air pipe and a cold primary air pipe;

[0013] The wind regulating door includes a hot primary air regulating door and a cold primary air regulating door;

[0014] The coal mill is connected with the hot primary air pipe, the hot primary air damper, the cold primary air pipe and the cold primary air damper respectively.

[0015] Optionally, the air pressure assembly comprises an inlet air pressure measurer and an outlet air pressure measurer.

[0016] The air inlet end of the coal mill is connected with the inlet air pressure measurer.

[0017] The air outlet end of the coal mill is connected with the outlet air pressure measurer.

[0018] Optionally, the coal pulverizing device further comprises a coal falling pipe.

[0019] The coal feeder is connected with the coal mill through the coal falling pipe.

[0020] Optionally, the control unit further comprises a first communication unit and a second communication unit, a first power supply unit and a second power supply unit.

[0021] The control unit is connected with the calculation unit and the first power supply unit respectively through the first communication unit.

[0022] The control unit is connected with the calculation unit, the second power supply unit and the display respectively through the second communication unit.

[0023] The calculation unit is connected with the display, the first power supply unit and the second power supply unit respectively.

[0024] Optionally, the control unit further comprises a first cable and a second cable.

[0025] The control unit is connected with the first communication unit and the second communication unit respectively through the first cable.

[0026] The first communication unit and the second communication unit are connected with the calculation unit through the second cable.

[0027] Optionally, the control unit further comprises a third cable and a fourth cable.

[0028] The first communication unit is connected with the first power supply unit through the third cable.

[0029] The second communication unit is connected with the second power supply unit through the third cable.

[0030] The calculation unit is connected with the first power supply unit and the second power supply unit respectively through the fourth cable.

[0031] Optionally, the control unit further comprises a keyboard and a mouse.

[0032] The display is connected with the keyboard and the mouse respectively.

[0033] Optionally, the computing unit comprises a selection weight module, a calculation weighted sum module, a model evaluation module, an adjustment weight module and a model application module.

[0034] The selection weight module is connected with the calculation weighted sum module and the adjustment weight module respectively.

[0035] The calculation weighted sum module, the model evaluation module and the model application module are connected in sequence.

[0036] Optionally, the computing unit further comprises a data input module, a data preparation module and a data output module.

[0037] The data input module is connected with the first communication unit, the second communication unit and the data preparation module respectively.

[0038] The data preparation module is connected with the selection weight module.

[0039] The data output module is connected with the model application module, the control unit and the display respectively.

[0040] From the above technical solutions, the utility model has the following advantages:

[0041] The utility model discloses a coal feeder and coal mill of control unit and pulverizing device are set, through the historical data and real-time data of coal feeder and coal mill of control unit to the analysis, thereby forecasts whether the coal mill exists the risk of coal blockage. The utility model effectively prevents the occurrence of coal mill blockage, and further realizes the unit load response rate of power generation enterprise, improves the unit stability and economy. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced to the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0043] Figure 1 The structure diagram of the coal-fired generating unit coal mill anti-blocking control device provided by the embodiment of the utility model is shown.

[0044] Figure 2 The structure diagram of the pulverizing device provided by the embodiment of the utility model is shown.

[0045] Figure 3A structure block diagram of a computing unit is provided for the fourth embodiment of the utility model.

[0046] In the figure, the reference signs have the following meanings:

[0047] 1, pulverizing device;2, control unit;3, control unit;4, first cable;5, first communication unit;6, second communication unit;7, second cable;8, third cable;9, computing unit;10, fourth cable;11, first power supply unit;12, second power supply unit;13, display;14, keyboard;15, mouse;101, coal feeder;102, coal mill;103, coal drop pipe;104, inlet air pressure measuring device;105, coal mill inlet primary air flow;106, hot primary air damper;107, cold primary air damper;108, hot primary air pipe;109, cold primary air pipe;110, coal feeder coal quantity;111, coal mill current;112, outlet air pressure measuring device;113, coal mill outlet temperature. DETAILED DESCRIPTION

[0048] The utility model embodiment provides a coal-fired generating unit coal mill anti -blocking control device for solving the technical problem that the existing coal mill optimization method needs large transformation investment, leads to the cost of transformation is too big, and easily exceeds the design budget.

[0049] In order to make the utility model purposes, features, advantages more obvious and easy to understand, below combining the drawings in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, the embodiment described below only is a part of the embodiment of the utility model, not all the embodiment.Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor all belong to the range of protection of the utility model.

[0050] Embodiment one

[0051] Please refer to Figures 1 to 2 , Figure 1 The structure schematic view of the coal-fired generating unit coal mill anti-blocking control device is provided for the utility model embodiment.

[0052] The coal-fired generating unit coal mill anti-blocking control device provided by the utility model includes a pulverizing device 1 and a control unit 3;The pulverizing device 1 and the control unit 3 are connected;The pulverizing device 1 includes a coal feeder 101 and a coal mill 102;The coal feeder 101 is connected with the coal mill 102;The coal mill 102 is connected with the air pipe, the air damper and the air pressure assembly respectively;The control unit 3 includes a control unit 2, a computing unit 9 and a display 13;The control unit 2 is connected with the computing unit 9 and the display 13 respectively.

[0053] It needs to be explained that, referring to Figure 1 The coal mill anti-blocking control device of the coal-fired generator set is shown in the figure, which comprises a coal pulverizing device 1 and a control unit 3. Figure 2 The coal pulverizing device 1 comprises a coal feeder 101, a coal mill 102, an air pipe, an air regulating valve and an air pressure assembly.

[0054] In specific implementation, the required raw coal of the coal feeder coal quantity 110 is obtained by controlling the speed of the coal feeder belt through the control unit 2, and the required raw coal is transferred to the coal feeder 101, and the required raw coal of the coal feeder coal quantity 110 is input into the coal mill 102 through the coal feeder 101 for coal powder grinding. During the coal powder grinding process, the primary air flow of the hot primary air or the cold primary air in the coal mill 102 needs to be controlled through the air regulating valve on the air pipe, and the inlet air pressure or the outlet air pressure of the coal mill 102 needs to be controlled through the air pressure assembly, so as to adjust the optimal coal grinding state of the coal mill 102 and obtain better coal grinding effect.

[0055] In specific implementation, the control unit 3 comprises a control unit 2, a calculation unit 9 and a display 13. When the control unit 3 obtains the historical data and real-time data of the coal mill 102, the historical data and real-time data are input into the calculation unit 9. Whether the current coal feeder coal quantity 110 or the current coal grinding quantity of the coal mill 102 reaches the preset coal blocking risk critical threshold is calculated, so as to judge whether the current coal mill 102 has a coal blocking risk; if so, a coal blocking risk alarm is issued and output to the display 13, and at the same time, the coal feeder coal quantity 110 provided by the coal feeder belt, the air regulating valve adjusting valve instruction and the like are controlled according to the related action superposition instruction action of the coal blocking trend. Real-time data of the coal feeder 101 and the coal mill 102 are obtained in real time, the real-time data are analyzed according to the historical data, the coal blocking risk is predicted, and the coal feeder 101 and the coal mill 102 are controlled according to the prediction result, so as to effectively realize more accurate coal blocking prediction and control.

[0056] Embodiment two

[0057] Please refer to Figure 2 , Figure 2 The structure diagram of the coal pulverizing device provided by the embodiment of the utility model.

[0058] The utility model provides a kind of coal-fired generating unit coal mill anti-blocking control device, air pipe includes hot primary air pipe 108 and cold primary air pipe 109;Air regulating valve includes hot primary air regulating valve 106 and cold primary air regulating valve 107;Coal mill 102 is connected with hot primary air pipe 108, hot primary air regulating valve 106, cold primary air pipe 109 and cold primary air regulating valve 107 respectively.

[0059] Need to be explained, as Figure 2 As shown, control unit 2 controls coal feeder belt speed to obtain the raw coal of required coal feeder coal quantity 110, coal feeder belt is transported to coal feeder 101, and raw coal is transported to coal mill 102 by the coal drop pipe 103 between coal feeder 101 and coal mill 102, and raw coal enters coal mill 102 and carries out coal powder grinding. Hot primary air pipe 108 is installed with hot primary air regulating valve 106, and the primary air flow of hot primary air in the inlet of coal mill 102 is controlled by hot primary air regulating valve 106, and similarly, cold primary air pipe 109 is installed with cold primary air regulating valve 107, and the outlet temperature 113 of coal mill outlet on coal mill 102 on powder pipe is controlled by cold primary air regulating valve 107. Inlet air pressure measurer 104 and outlet air pressure measurer 112 measure the air pressure after the mixing of hot and cold air pipe of coal mill 102 and the outlet air pressure of coal mill. Pulverizing device 1 further includes coal mill current 111, and coal mill current 111 represents the output condition of coal mill 102.

[0060] Example three

[0061] Please refer to Figure 1 , Figure 1 The structure schematic view of a kind of coal-fired generating unit coal mill anti-blocking control device provided in the utility model embodiment.

[0062] The utility model provides a kind of coal-fired generating set coal mill anti-blocking control device, control unit 3 further include first communication unit 5 and second communication unit 6, first power unit 11 and second power unit 12;Control unit 2 is connected with calculation unit 9 and first power unit 11 respectively by first communication unit 5;Control unit 2 is connected with calculation unit 9, second power unit 12 and display 13 respectively by second communication unit 6;Calculation unit 9 is connected with display 13, first power unit 11 and second power unit 12 respectively.Control unit 3 further include first cable 4 and second cable 7;Control unit 2 is connected with first communication unit 5 and second communication unit 6 respectively by first cable 4;First communication unit 5 and second communication unit 6 are connected with calculation unit 9 by second cable 7.Control unit 3 further include third cable 8 and fourth cable 10;First communication unit 5 is connected with first power unit 11 by third cable 8;Second communication unit 6 is connected with second power unit 12 by third cable 8;Calculation unit 9 is connected with first power unit 11 and second power unit 12 respectively by fourth cable 10.Control unit 3 further include keyboard 14 and mouse 15;Display 13 is connected with keyboard 14 and mouse 15 respectively.

[0063] Need to be explained, refer to Figure 1 As shown in the drawing, control unit 2 (DCS) can obtain the data signal of pulverizing device 1 and output device controllable instruction;Device controllable instruction output by control unit 2 is input to calculation unit 9 and first power unit 11 respectively by first communication unit 5;Device controllable instruction output by control unit 2 is input to calculation unit 9, second power unit 12 and display 13 respectively by second communication unit 6.

[0064] In specific implementation, the data signal or instruction execution feedback information of each device is sent to control unit 2 by first cable 4, and the data signal or device controllable instruction of control unit 2 is sent to first communication unit 5 or second communication unit 6 by first cable 4.Similarly, data signal, device controllable instruction or instruction execution feedback information is sent to first communication unit 5 or second communication unit 6 or calculation unit 9 by second cable 7.

[0065] First power unit 11 and second power unit 12 provide 24V DC power supply for first communication unit 5 or second communication unit 6 by third cable 8.

[0066] First power unit 11 and second power unit 12 provide 24V DC power supply or 240V AC power supply for calculation unit 9 by fourth cable 10.

[0067] Display 13 is connected with keyboard 14 and mouse 15 respectively.Display 13 can display the related parameters and picture of the device, and the parameters of the device are conveniently set.

[0068] Specifically, referring to Figure 1 As shown in the figure, the first communication unit 5 is a main communication unit, and the second communication unit 6 is a backup communication unit; the first power supply unit 11 is a main power supply unit, and the second power supply unit 12 is a backup power supply unit.

[0069] Embodiment Four

[0070] Please refer to Figure 3 , Figure 3 A structural block diagram of a calculation unit 9 provided in the embodiment four of the utility model.

[0071] The utility model provides a kind of coal mill anti-blocking control device of coal-fired generating set, and calculation unit 9 includes selection weight module M13, calculation weighted sum module M14, model evaluation module M15, adjustment weight module M16 and model application module M17;Selection weight module M13 is connected with calculation weighted sum module M14 and adjustment weight module M16 respectively;Calculation weighted sum module M14, model evaluation module M15 and model application module M17 are sequentially connected.Calculation unit 9 further include data input module M11, data preparation module M12 and data output module M18;Data input module M11 is connected with first communication unit 5, second communication unit 6 and data preparation module M12 respectively;Data preparation module M12 is connected with selection weight module M13;Data output module M18 is connected with model application module M17, control unit 2 and display 13 respectively.

[0072] Need to be explained, referring to Figure 3 As shown in the figure, calculation unit 9 includes data input module M11, data preparation module M12, selection weight module M13, calculation weighted sum module M14, model evaluation module M15, adjustment weight module M16, model application module M17 and data output module M18 respectively.

[0073] In specific implementation, data input module M11: obtains power plant unit operating parameter and information from control unit (DCS), including coal mill inlet primary air flow 105, coal mill inlet and outlet differential pressure, coal mill current 111, coal mill outlet temperature 113, coal mill air-coal ratio, coal feeder coal amount 110, unit load, main steam pressure, main steam temperature historical data, real-time data.

[0074] Data preparation module M12: collects coal mill inlet primary air flow 105, coal mill inlet and outlet differential pressure, coal mill current 111, coal mill outlet temperature 113, coal mill air-coal ratio, coal feeder coal amount 110, unit load, main steam pressure, main steam temperature historical data, real-time data, and collates time series data, to ensure data quality and integrity.

[0075] The selection weight module M13: according to the data characteristics of the coal-fired unit and the coal mill and the predicted demand, a suitable weight mode is selected, and the weighted moving average time sequence analysis method is adopted in this module.

[0076] In this embodiment, the data of 20 time points in the sliding window period are adopted, and the selection (0.112060547, 0.098876953, 0.09375, 0.087158203, 0.076904297, 0.067236328, 0.059326172, 0.05625, 0.052294922, 0.046142578, 0.037353516, 0.032958984, 0.03125, 0.029052734, 0.025634766, 0.022412109, 0.019775391, 0.01875, 0.017431641, 0.015380859) is adopted as the weight value, and the latest 20 time points are respectively assigned to 11.2060547%, 9.8876953%, 9.375%, 8.7158203%, 7.6904297%, 6.7236328%, 5.9326172%, 5.625%, 5.2294922%, 4.6142578%, 3.7353516%, 3.2958984%, 3.125%, 2.9052734%, 2.5634766%, 2.2412109%, 1.9775391%, 1.875%, 1.7431641%, 1.5380859%.

[0077] The calculation weighted sum module M14: according to the selected weight, the historical data is weighted and summed to obtain the prediction of the future value. Specifically, the prediction expression is:

[0078] (1)

[0079] In the formula, pred(t) represents the prediction value of the time point t; obs(t-i) represents the observation value of the time point t-i; and w(t-i) represents the weight corresponding to the time point. The prediction value of the time t is calculated through the formula (1), wherein the prediction value includes the primary air flow of the coal mill inlet , the inlet and outlet differential pressure of the coal mill , the current of the coal mill

[0080] , the outlet temperature of the coal mill , and the air-coal ratio of the coal mill .

[0081] ​​​The model evaluation module M15: uses the coal plugging trend evaluation index to evaluate the prediction accuracy of the model.

[0082] According to the mill inlet primary air flow , mill inlet and outlet differential pressure , mill current , mill outlet temperature And the mill air-coal ratio , the mill inlet primary air flow rate , the mill inlet and outlet differential pressure rate , the mill current rate , the mill outlet temperature rate And the mill air-coal ratio rate .

[0083] Specifically, the expression of the mill coal plugging trend value is:

[0084] (2)

[0085] In the formula, Indicates the mill coal plugging trend value at time point t; Indicates the mill inlet primary air flow rate coal plugging trend value weight; Indicates the mill inlet and outlet differential pressure rate coal plugging trend value weight; Indicates the mill current rate coal plugging trend value weight; Indicates the mill outlet temperature rate coal plugging trend value weight; Indicates the mill air-coal ratio rate coal plugging trend value weight.

[0086] Wherein, According to the mill coal plugging characteristics, the weight is set.

[0087] When the mill coal plugging trend value Is greater than the mill coal plugging risk critical threshold , it is judged that the mill exists coal plugging risk, alarm and according to the mill coal plugging trend value Forming related action superposition instruction action coal feeder coal amount 110, hot primary air valve instruction, hot primary air flow set value.

[0088] Adjust the weight module M16: if the model effect is not good, you can try to adjust the weight to improve the model performance.

[0089] By comparing the historical coal plugging conditions of the mill 102 under different loads, the mill coal plugging trend model parameter weight is adjusted to improve the accuracy of the mill coal plugging trend.

[0090] The model application module M17 applies the optimized model to actual prediction, monitors the prediction effect of the model, and adjusts according to the unit performance and the coal mill 102 performance.

[0091] The data output module M18 outputs the prediction value and the control value to the control unit 2 (DCS). The related action superposition instruction actions of the coal feeder coal amount 110, the hot primary air adjusting valve superposition instruction, and the hot primary air flow setting value superposition instruction are output to the control unit 2 (DCS), and the control unit 2 controls the related equipment to perform corresponding actions according to the instructions.

[0092] It should be noted that the data input module M11 obtains the power plant unit operation parameters and information from the control unit 2 (DCS). The data preparation module M12 collects and organizes time series data to ensure data quality and integrity. The weight selection module M13 selects appropriate weight methods according to the coal-fired unit and the coal mill data characteristics and prediction requirements. This module uses a weighted moving average time series analysis method. The weighted sum calculation module M14 weights the historical data according to the selected weights to obtain the prediction of the future value. The model evaluation module M15 uses evaluation indexes to evaluate the prediction accuracy of the model. The weight adjustment module M16 can try to adjust the weight to improve the model performance if the model effect is not good.

[0093] The model application module M17 applies the optimized model to actual prediction, monitors the prediction effect of the model, and adjusts according to the need. The data output module M18 outputs the prediction value and the control value to the control unit 2 (DCS).

[0094] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0096] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0097] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0098] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical scheme of the present application essentially or the part that contributes to the prior art or the whole or part of the technical scheme can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0099] The above-described embodiments are only used to illustrate the technical scheme of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the corresponding technical scheme deviate from the spirit and scope of the technical scheme of each embodiment of the present application.

Claims

1. A coal mill anti-jamming control device for a coal-fired power generating unit, characterized in that, The coal-fired generator set coal mill anti-blocking control device comprises a milling device and a control unit; The milling device and the control unit are connected; The milling device comprises a coal feeder and a coal mill; The coal feeder is connected with the coal mill; The coal mill is connected with a wind pipe, a wind adjusting door and a wind pressure component respectively; The control unit comprises a control unit, a calculation unit and a display; The control unit is connected with the calculation unit and the display respectively.

2. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 1, characterized in that, The wind pipe comprises a hot primary air pipe and a cold primary air pipe; The wind adjusting door comprises a hot primary air adjusting door and a cold primary air adjusting door; The coal mill is connected with the hot primary air pipe, the hot primary air adjusting door, the cold primary air pipe and the cold primary air adjusting door respectively.

3. The coal mill anti-jamming control device for coal-fired power generating units according to claim 1, characterized in that, The wind pressure component comprises an inlet wind pressure measurer and an outlet wind pressure measurer; The inlet of the coal mill is connected with the inlet wind pressure measurer; The outlet of the coal mill is connected with the outlet wind pressure measurer.

4. The coal mill anti-jamming control device for coal-fired power generating units according to claim 1, characterized in that, The milling device further comprises a coal falling pipe; The coal feeder is connected with the coal mill through the coal falling pipe.

5. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 1, characterized by, The control unit further comprises a first communication unit and a second communication unit, a first power unit and a second power unit; The control unit is connected with the calculation unit and the first power unit through the first communication unit respectively; The control unit is connected with the calculation unit, the second power unit and the display through the second communication unit respectively; The calculation unit is connected with the display, the first power unit and the second power unit respectively.

6. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 5, characterized in that, The control unit further comprises a first cable and a second cable; The control unit is connected with the first communication unit and the second communication unit through the first cable respectively; The first communication unit and the second communication unit are connected with the calculation unit through the second cable.

7. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 5, characterized in that, The control unit further comprises a third cable and a fourth cable; The first communication unit is connected with the first power unit through the third cable; The second communication unit is connected with the second power unit through the third cable; The calculation unit is connected with the first power unit and the second power unit through the fourth cable respectively.

8. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 1, characterized by, The control unit further comprises a keyboard and a mouse; The display is connected with the keyboard and the mouse respectively.

9. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 5, characterized in that, The calculation unit comprises a weight selection module, a weighted sum calculation module, a model evaluation module, a weight adjustment module and a model application module; The weight selection module is connected with the weighted sum calculation module and the weight adjustment module respectively; The weighted sum calculation module, the model evaluation module and the model application module are connected in sequence.

10. The coal mill anti-jamming control device for a coal-fired power generating unit according to claim 9, characterized by, The calculation unit further comprises a data input module, a data preparation module and a data output module; The data input module is connected with the first communication unit, the second communication unit and the data preparation module respectively; The data preparation module is connected with the weight selection module; The data output module is connected with the model application module, the control unit and the display respectively.

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