Intelligent control method and system for comprehensively judging next air matching of coal pulverizing system

Abstract

The invention discloses an intelligent control method and system for comprehensively judging next air matching of a coal pulverizing system. The system comprises a first switching module, a first AND module, a first over-limit module, a second switching module, a second AND module, a second over-limit module, a third switching module, a third AND module, a third over-limit module, a fourth switching module, a fourth AND module, a fourth over-limit module, a fifth switching module, a fifth AND module and a fifth over-limit module. In each working condition operation stage, a prediction model is established by utilizing a machine learning or deep learning algorithm based on the collected data, and the optimal air volume and air speed matching scheme is predicted according to the current production condition, so that the optimal grinding efficiency and the optimal energy consumption ratio are realized.

Description

Technical Field

[0001] The invention belongs to the field of intelligent control of thermal power plants, and in particular relates to an intelligent control method and system for comprehensively judging the next wind matching of a pulverizing system. Background Art

[0002] Intelligent control of the pulverizing system can improve production efficiency, ensure product quality, and save energy consumption. At present, researchers can conduct real-time monitoring and data collection of various parameters in the pulverizing system, such as raw material characteristics (particle size, humidity, etc.), coal mill load, air volume, wind speed, temperature, pressure, etc. However, it is not possible to conduct in-depth analysis of historical data through big data analysis technology to find out the key factors and laws affecting wind matching. It is urgent to develop an intelligent control method and system for the pulverizing system to comprehensively judge the next wind matching, so as to realize the intelligent upgrade of the pulverizing system, improve production efficiency and product quality, and reduce energy consumption and operating costs. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent control method and system for a powder making system to comprehensively judge the next wind matching. In each operating stage, the present invention establishes a prediction model based on the collected data and utilizes machine learning or deep learning algorithms to predict the optimal air volume and wind speed matching scheme according to the current production conditions to achieve the optimal grinding efficiency and energy consumption ratio.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: The milling system comprehensively judges the intelligent control system for the next wind matching, including a first switching module, a first AND module, a first over-limit module, a second switching module, a second AND module, a second over-limit module, a third switching module, a third AND module, a third over-limit module, a fourth switching module, a fourth AND module, a fourth over-limit module, a fifth switching module, a fifth AND module and a fifth over-limit module; The output end of the first over-limit module is connected to the first AND module, and the first AND module is connected to the S end of the first switching module; the output end of the second over-limit module is connected to the second AND module, and the second AND module is connected to the S end of the second switching module; the output end of the third over-limit module is connected to the third AND module, and the third AND module is connected to the S end of the third switching module; the output end of the fourth over-limit module is connected to the fourth AND module, and the fourth AND module is connected to the S end of the fourth switching module; the output end of the fifth over-limit module is connected to the fifth AND module, and the fifth AND module is connected to the S end of the fifth switching module.

[0005] A further improvement of the present invention is that it further comprises a first small selection module, a second small selection module, a third small selection module, a fourth small selection module and a sixth over-limit module; The output end of the first switching module and the output end of the second switching module are both connected to the first small selection module; the output end of the third switching module and the output end of the fourth switching module are both connected to the second small selection module; the output end of the first small selection module and the output end of the second small selection module are both connected to the third small selection module; the output end of the third small selection module and the output end of the fifth switching module are both connected to the fourth small selection module; the fourth small selection module is connected to the sixth over-limit module in turn.

[0006] A further improvement of the present invention is that it also includes a first switching module, a second switching module, a sixth and module, a seventh and module, a joint start standby sealed fan, a joint start B sealed fan and a joint start A sealed fan; The output end of the sixth over-limit module is connected to the joint start standby sealed fan; the output end of the sixth over-limit module, the first switching module, and the A sealed fan regulating valve failure are all connected to the sixth AND module, and the output end of the sixth AND module is connected to the joint start B sealed fan; the sixth over-limit module, the second switching module, and the B sealed fan regulating valve failure are all connected to the seventh AND module, and the output end of the seventh AND module is connected to the joint start A sealed fan.

[0007] A further improvement of the present invention is that the differential pressure between wind and primary air is connected to the PV1 end of the first switching module.

[0008] A further improvement of the present invention is that the A coal mill is operatively connected to the first and module; The actual measured value of the coal feeding rate of coal feeder A is connected to the first over-limit module.

[0009] A further improvement of the present invention is that the differential pressure between the sealing air of the B mill and the primary air is connected to the PV1 end of the second switching module; B coal mill operation connected to the second and module; The measured value of the coal feeding rate of coal feeder B is connected to the second over-limit module.

[0010] A further improvement of the present invention is that the differential pressure between the C mill sealing air and the primary air is connected to the PV1 end of the third switching module; C coal mill operation connected to the third and module; The measured value of the coal feeding rate of the C coal feeder is connected to the third over-limit module.

[0011] A further improvement of the present invention is that the differential pressure between the sealing air of the D mill and the primary air is connected to the PV1 end of the fourth switching module; D coal mill operation connected to the fourth and module; The actual measured value of the coal feeding rate of the D coal feeder is connected to the fourth over-limit module.

[0012] A further improvement of the present invention is that the differential pressure between the E-mill sealing air and the primary air is connected to the PV1 end of the fifth switching module; E coal mill operation are connected to the fifth and modules; The actual measured value of the coal feeding rate of E coal feeder is connected to the fifth over-limit module.

[0013] An intelligent control method for comprehensively judging the next wind matching of a milling system, based on the intelligent control system for comprehensively judging the next wind matching of a milling system, comprises: When the operation of coal mill A is 1 and the measured value of coal feeding rate of coal feeder A is greater than 12t / h, the output of the first switching module is the differential pressure between the sealing air and primary air of mill A; When the B coal mill is running at 1 and the measured value of the coal feeding rate of the B coal feeder satisfies the requirement of being greater than 12t / h, the output of the second switching module is the differential pressure between the sealing air and the primary air of the B mill; When the C coal mill is running at 1 and the measured value of the coal feeding rate of the C coal feeder satisfies the requirement of being greater than 12t / h, the output of the third switching module is the differential pressure between the C mill sealing air and the primary air; When the operation of D coal mill is 1 and the measured value of the coal feeding rate of D coal feeder meets the requirement of being greater than 12t / h, the output of the fourth and module is the differential pressure between the sealing air and primary air of D mill; When the E coal mill is running at 1 and the measured value of the coal feeding rate of the E coal feeder satisfies the requirement of being greater than 12t / h, the output of the fifth switching module is the differential pressure between the E mill sealing air and the primary air; The differential pressure between the sealing air and primary air of mill A, the differential pressure between the sealing air and primary air of mill B, the differential pressure between the sealing air and primary air of mill C, the differential pressure between the sealing air and primary air of mill D, and the differential pressure between the sealing air and primary air of mill E are selected with the fourth selection module; When the output value of the fourth selected small module is less than 2.5kPa, the joint start standby sealing fan is 1; The output value of the fourth selected small module is less than 2.5kPa, the first switching module is 1, and the A sealed fan valve failure is 1. When the above three conditions are met, the B sealed fan is linked to 1; The output value of the fourth selected small module is less than 2.5kPa, the second switching module is 1, and the B sealed fan valve adjustment failure is 1. When the above three conditions are met, the A sealed fan is started at 1.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: The present invention provides an intelligent control method for a pulverizing system for comprehensively judging the next wind matching. The method takes the coal mill load, air volume, wind speed, temperature, pressure, etc. as the basis for judgment, conducts in-depth analysis of historical data, finds out the key factors and rules that affect wind matching, predicts the best air volume and wind speed matching scheme according to the current production conditions, and realizes intelligent control of the pulverizing system for comprehensively judging the next wind matching.

[0015] The invention provides an intelligent control system for a milling system to comprehensively judge the next wind matching, and integrates the prediction model into the control system of the milling system to realize real-time data collection, analysis and adjustment. When production conditions change, the intelligent control system can automatically adjust the air volume and wind speed to ensure that the milling process is always kept in the best state.

[0016] In summary, the intelligent air volume control method and system under various working conditions of a powder making system described in the present invention comprehensively consider various operating factors of the powder making system and adopt corresponding air volume control methods, integrate the intelligent control system with the existing powder making equipment, and conduct sufficient testing to ensure the compatibility and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The schematic diagram of the intelligent control system for comprehensively judging the next wind matching for the milling system.

[0019] Figure 2 This is a rendering of an embodiment of the present invention.

[0020] In the attached figure: 001, differential pressure between the sealing air and primary air of mill A, 002, coal mill A operation, 003, measured value of coal feeding rate of coal feeder A, 004, differential pressure between the sealing air and primary air of mill B, 005, coal mill B operation, 006, measured value of coal feeding rate of coal feeder B, 007, differential pressure between the sealing air and primary air of mill C, 008, coal mill C operation, 009, measured value of coal feeding rate of coal feeder C, 010, differential pressure between the sealing air and primary air of mill D, 011, coal mill D operation, 012, measured value of coal feeding rate of coal feeder D, 013, differential pressure between the sealing air and primary air of mill E, 014, coal mill E operation, 015, measured value of coal feeding rate of coal feeder E, 016, first switching module, 017, first and module, 018, first over-limit module, 019, second switching module, 020, second and module, 021 , the second over-limit module, 022, the third switching module, 023, the third and module, 024, the third over-limit module, 025, the fourth switching module, 026, the fourth and module, 027, the fourth over-limit module, 028, the fifth switching module, 029, the fifth and module, 030, the fifth over-limit module, 031, the first small selection module, 032, the second small selection module, 033, the third small selection module, 034, the fourth small selection module, 035, the sixth over-limit module, 036, the first switching module, 037, A sealed fan regulating valve failure, 038, the second switching module, 039, B sealed fan regulating valve failure, 040, the sixth and module, 041, the seventh and module, 042, joint start of the standby sealed fan, 043, joint start of B sealed fan, 044, joint start of A sealed fan. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0024] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] It should also be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0028] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] The purpose of the present invention is to provide an intelligent control method and system for a powder making system to comprehensively judge the next wind matching. In each operating stage, the present invention establishes a prediction model based on the collected data and utilizes machine learning or deep learning algorithms to predict the optimal air volume and wind speed matching scheme according to the current production conditions to achieve the optimal grinding efficiency and energy consumption ratio.

[0032] Example 1 like Figure 1 As shown, the pulverizing system provided by the present invention comprehensively judges the intelligent control system for matching the next primary air, including: A mill sealed air and primary air differential pressure 001, A coal mill operation 002, A coal feeder coal feeding rate measured value 003, B mill sealed air and primary air differential pressure 004, B coal mill operation 005, B coal feeder coal feeding rate measured value 006, C mill sealed air and primary air differential pressure 007, C coal mill operation 008, C coal feeder coal feeding rate measured value 009, D mill sealed air and primary air differential pressure 010, D coal mill operation 011, D coal feeder coal feeding rate measured value 012, E mill sealed air and primary air differential pressure 013, E coal mill operation 014, E coal feeder coal feeding rate measured value 015, first switching module 016, first and module 017, first over-limit module 018, second switching module 019, Change module 019, second AND module 020, second over-limit module 021, third switching module 022, third AND module 023, third over-limit module 024, fourth switching module 025, fourth AND module 026, fourth over-limit module 027, fifth switching module 028, fifth AND module 029, fifth over-limit module 030, first small selection module 031, second small selection module 032, third small selection module 033, fourth small selection module 034, sixth over-limit module 035, first switching module 036, A sealed fan regulating valve failure 037, second switching module 038, B sealed fan regulating valve failure 039, sixth AND module 040, seventh AND module 041, jointly start the standby sealed fan 042, jointly start the B sealed fan 043 and jointly start the A sealed fan 044.

[0033] Among them, the measured value 003 of the coal feeding rate of the A coal feeder is connected to the first over-limit module 018, the output end of the first over-limit module 018 and the A coal mill operation 002 are both connected to the first AND module 017, the A mill sealing wind and primary air differential pressure 001 and the first AND module 017 are respectively connected to the PV1 end and S end of the first switching module 016; the measured value 006 of the coal feeding rate of the B coal feeder is connected to the second over-limit module 021, the output end of the second over-limit module 021 and the B coal mill operation 005 are both connected to the second AND module 020, the B mill sealing wind and primary air differential pressure 004 and the second AND module 020 are respectively connected to the PV1 end and S end of the second switching module 019; the measured value 009 of the coal feeding rate of the C coal feeder is connected to the third over-limit module 024, the output end of the third over-limit module 024 and the C coal mill operation 008 are both connected The third AND module 023, the C mill sealed wind and primary air differential pressure 007 and the third AND module 023 are respectively connected to the PV1 end and the S end of the third switching module 022; the D coal feeder coal feeding rate measured value 012 is connected to the fourth over-limit module 027, the output end of the fourth over-limit module 027 and the D coal mill operation 011 are both connected to the fourth AND module 026, the D mill sealed wind and primary air differential pressure 010 and the fourth AND module 026 are respectively connected to the PV1 end and the S end of the fourth switching module 025; the E coal feeder coal feeding rate measured value 015 is connected to the fifth over-limit module 030, the output end of the fifth over-limit module 030 and the E coal mill operation 014 are both connected to the fifth AND module 029, the E mill sealed wind and primary air differential pressure 013 and the fifth AND module 029 are respectively connected to the PV1 end and the S end of the fifth switching module 028.

[0034] The output end of the first switching module 016 and the output end of the second switching module 019 are both connected to the first small selection module 031; the output end of the third switching module 022 and the output end of the fourth switching module 025 are both connected to the second small selection module 032; the output end of the first small selection module 031 and the output end of the second small selection module 032 are both connected to the third small selection module 033; the output end of the third small selection module 033 and the output end of the fifth switching module 028 are both connected to the fourth small selection module 034; the fourth small selection module 034 is sequentially connected to the sixth over-limit module 035.

[0035] The output end of the sixth over-limit module 035 is connected to the joint start standby sealed fan 042; the output end of the sixth over-limit module 035, the first switching module 036, and the A sealed fan regulating valve failure 037 are all connected to the sixth AND module 040, and the output end of the sixth AND module 040 is connected to the joint start B sealed fan 043; the sixth over-limit module 035, the second switching module 038, and the B sealed fan regulating valve failure 039 are all connected to the seventh AND module 041, and the output end of the seventh AND module 041 is connected to the joint start A sealed fan 044.

[0036] Example 2 like Figure 1 As shown, the intelligent control system for comprehensively judging the next wind matching of the milling system provided by the present invention includes: 1) When the operation value of coal mill A 002 is 1 and the measured value of coal feeding rate of coal feeder A 003 satisfies the requirement of being greater than 12 t / h, the output of the first switching module 016 is the differential pressure between the sealing air and primary air of mill A 001; 2) When the B coal mill operation 005 is 1 and the B coal feeder coal feeding rate measured value 006 satisfies the requirement of being greater than 12t / h, the output of the second switching module 019 is the differential pressure 004 between the B mill sealing air and the primary air; 3) When the C coal mill operation 008 is 1 and the C coal feeder coal feeding rate measured value 009 satisfies the requirement of being greater than 12 t / h, the output of the third switching module 022 is the C mill sealing air and primary air differential pressure 007; 4) When the D coal mill operation 011 is 1 and the D coal feeder coal feeding rate measured value 012 satisfies the requirement of being greater than 12t / h, the output of the fourth and module 026 is the differential pressure 010 between the D mill sealing air and the primary air; 5) When the E coal mill operation 014 is 1 and the E coal feeder coal feeding rate measured value 015 satisfies the requirement of being greater than 12 t / h, the output of the fifth switching module 028 is the differential pressure 013 between the E mill sealing air and the primary air; 6) Use the fourth selection module 034 to select the minimum value of the differential pressure between the sealing air and primary air of mill A 001, the differential pressure between the sealing air and primary air of mill B 004, the differential pressure between the sealing air and primary air of mill C 007, the differential pressure between the sealing air and primary air of mill D 010, and the differential pressure between the sealing air and primary air of mill E 013; 7) When the output value of the fourth selected small module 034 is less than 2.5 kPa, the joint start standby sealing fan 042 is 1; 8) The output value of the fourth selected small module 034 is less than 2.5kPa, the first switching module 036 is 1, and the A sealed fan valve adjustment fault 037 is 1. When the above three conditions are met, the B sealed fan 043 is 1; 9) The output value of the fourth selected small module 034 is less than 2.5kPa, the second switching module 038 is 1, and the B sealed fan valve adjustment failure 039 is 1. When the above three conditions are met, the A sealed fan 044 is linked to 1.

[0037] Example 3 like Figure 2As shown, through the implementation and application of the technology of the present invention in a simulation environment, within the time range of 0 to 25, the historical parameters of the differential pressure between the mill sealing wind and the primary air are transmitted to the powder making system developed by the present invention to comprehensively judge the next primary air matching intelligent control method and system, monitor the state of the differential pressure between the mill sealing wind and the primary air, and effectively predict the actual numerical changes of the current differential pressure between the mill sealing wind and the primary air, with a prediction range of 0-9. When an abnormal situation occurs, the model will actively identify the fault problem and time point according to the actual situation on site, and remind the operating personnel to start the standby sealed fan, the A sealed fan or the B sealed fan.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. The intelligent control system for the milling system comprehensively judges the next wind matching, which is characterized by: It comprises a first switching module (016), a first AND module (017), a first over-limit module (018), a second switching module (019), a second AND module (020), a second over-limit module (021), a third switching module (022), a third AND module (023), a third over-limit module (024), a fourth switching module (025), a fourth AND module (026), a fourth over-limit module (027), a fifth switching module (028), a fifth AND module (029) and a fifth over-limit module (030); The output end of the first over-limit module (018) is connected to the first AND module (017), and the first AND module (017) is connected to the S end of the first switching module (016); the output end of the second over-limit module (021) is connected to the second AND module (020), and the second AND module (020) is connected to the S end of the second switching module (019); the output end of the third over-limit module (024) is connected to the third AND module (023), and the third AND module (023) is connected to the S end of the third switching module (022); the output end of the fourth over-limit module (027) is connected to the fourth AND module (026), and the fourth AND module (026) is connected to the S end of the fourth switching module (025); the output end of the fifth over-limit module (030) is connected to the fifth AND module (029), and the fifth AND module (029) is connected to the S end of the fifth switching module (028).

2. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 1 is characterized in that: It also includes a first small selection module (031), a second small selection module (032), a third small selection module (033), a fourth small selection module (034) and a sixth over-limit module (035); The output end of the first switching module (016) and the output end of the second switching module (019) are both connected to the first small selection module (031); the output end of the third switching module (022) and the output end of the fourth switching module (025) are both connected to the second small selection module (032); the output end of the first small selection module (031) and the output end of the second small selection module (032) are both connected to the third small selection module (033); the output end of the third small selection module (033) and the output end of the fifth switching module (028) are both connected to the fourth small selection module (034); the fourth small selection module (034) is sequentially connected to the sixth over-limit module (035).

3. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 2 is characterized in that: It also includes a first switching module (036), a second switching module (038), a sixth and module (040), a seventh and module (041), a joint start standby sealed fan (042), a joint start B sealed fan (043) and a joint start A sealed fan (044); The output end of the sixth over-limit module (035) is connected to the joint start standby sealed fan (042); the output end of the sixth over-limit module (035), the first switching module (036), and the A sealed fan regulating valve failure (037) are all connected to the sixth AND module (040), and the output end of the sixth AND module (040) is connected to the joint start B sealed fan (043); the sixth over-limit module (035), the second switching module (038), and the B sealed fan regulating valve failure (039) are all connected to the seventh AND module (041), and the output end of the seventh AND module (041) is connected to the joint start A sealed fan (044).

4. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 3 is characterized in that: The wind and primary air differential pressure (001) is connected to the PV1 terminal of the first switching module (016).

5. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 4 is characterized in that: A coal mill operation (002) is connected to the first and module (017); The measured value of the coal feeding rate of the coal feeder A (003) is connected to the first over-limit module (018).

6. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 5 is characterized in that: The differential pressure (004) between the sealing air and the primary air of the B mill is connected to the PV1 terminal of the second switching module (019); B coal mill operation (005) is connected to the second and module (020); The measured value of the coal feeding rate of the coal feeder B (006) is connected to the second over-limit module (021).

7. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 6 is characterized in that: The differential pressure (007) between the C mill sealing air and the primary air is connected to the PV1 terminal of the third switching module (022); C coal mill operation (008) is connected to the third and module (023); The measured value of the coal feeding rate of the C coal feeder (009) is connected to the third over-limit module (024).

8. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 7 is characterized in that: The differential pressure (010) between the sealing air of the D mill and the primary air is connected to the PV1 terminal of the fourth switching module (025); D coal mill operation (011) is connected to the fourth and module (026); The measured value of the coal feeding rate of the D coal feeder (012) is connected to the fourth over-limit module (027).

9. The intelligent control system for comprehensively judging the next air matching of the milling system according to claim 8 is characterized in that: The differential pressure (013) between the E-mill sealing air and the primary air is connected to the PV1 terminal of the fifth switching module (028); E coal mill operation (014) are connected to the fifth and module (029); The measured value of the coal feeding rate of the E coal feeder (015) is connected to the fifth over-limit module (030).

10. An intelligent control method for comprehensively judging the next wind matching of a milling system, characterized in that: The method is based on the intelligent control system for comprehensively judging the next wind matching of the milling system according to claim 9, comprising: When the operation of coal mill A (002) is 1 and the measured value of coal feeding rate of coal feeder A (003) satisfies the requirement of being greater than 12 t / h, the output of the first switching module (016) is the differential pressure between the sealing air and primary air of mill A (001); When the B coal mill operation (005) is 1 and the measured value of the coal feed rate of the B coal feeder (006) satisfies the requirement of being greater than 12 t / h, the output of the second switching module (019) is the differential pressure between the sealing air and the primary air of the B mill (004); When the C coal mill operation (008) is 1 and the C coal feeder coal feeding rate measured value (009) satisfies the requirement of being greater than 12 t / h, the output of the third switching module (022) is the C mill sealing air and primary air differential pressure (007); When the D coal mill operation (011) is 1 and the D coal feeder coal feeding rate measured value (012) satisfies the requirement of being greater than 12 t / h, the output of the fourth AND module (026) is the differential pressure between the D mill sealing air and the primary air (010); When the E coal mill operation (014) is 1 and the E coal feeder coal feeding rate measured value (015) satisfies the requirement of being greater than 12 t / h, the output of the fifth switching module (028) is the differential pressure between the E mill sealing air and the primary air (013); The fourth selection module (034) selects the minimum value of the differential pressure between the sealing air and the primary air of the A mill (001), the differential pressure between the sealing air and the primary air of the B mill (004), the differential pressure between the sealing air and the primary air of the C mill (007), the differential pressure between the sealing air and the primary air of the D mill (010), and the differential pressure between the sealing air and the primary air of the E mill (013); When the output value of the fourth selected small module (034) is less than 2.5 kPa, the joint start standby sealing fan (042) is 1; The output value of the fourth selected small module (034) is less than 2.5 kPa, the first switching module (036) is 1, and the A sealed fan valve failure (037) is 1. When all three conditions are met, the B sealed fan (043) is 1; The output value of the fourth selected small module (034) is less than 2.5 kPa, the second switching module (038) is 1, and the B sealed fan valve failure (039) is 1. When all three conditions are met, the A sealed fan (044) is 1.

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