A cement vertical mill parameter adjustment system and method based on PLC control

Abstract

The invention discloses a cement vertical mill parameter adjustment system and method based on PLC control, belonging to the technical field of cement vertical mills, comprising: a DCS unit, the DCS unit comprising a first adjustment button; a PLC control unit, the PLC control unit is communicatively connected with the DCS unit, and the PLC control unit further comprises: a first parameter adjustment module, the first parameter adjustment module is used to adjust the air intake volume of the cement vertical mill equipment; a second parameter adjustment module, the second parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; a third parameter adjustment module, the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; and a fourth parameter adjustment module, the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment, thereby achieving the technical effect that the system can instantly and automatically adjust various relevant parameters of the mill, realize the stabilization of the mill, avoid the situation of lifting the roller or even tripping and stopping the main motor of the mill, and improve the equipment operation rate.

Description

Technical Field

[0001] The invention relates to the technical field of cement vertical mills, and in particular to a cement vertical mill parameter adjustment system and method based on PLC control. Background Art

[0002] The operation process of cement vertical mill is as follows: 1. One way is clinker and slag and other auxiliary materials, which are transported to the vertical mill according to a certain ratio through belt scales, belt conveyors and other equipment. One way is fly ash, which is measured by the punch plate flow meter and transported to the vertical mill through pneumatic chute and other equipment according to a certain ratio; 2. The motor drives the reducer to drive the grinding disc to rotate, and the materials are crushed under the action of the gravity of the grinding roller, the hydraulic force, and the shear force generated by the rotation of the grinding disc and grinding roller; 3. The ground materials spread to the surroundings through the edge of the grinding disc, and then are carried by the high-speed air flow from the air ring. Part of it enters the powder selector installed on the grinding chamber, and part of it overflows and returns to the mill for secondary grinding through the external return material hoist. The materials entering the powder selector are separated into coarse powder and finished products. The coarse powder falls back to the grinding disc for further grinding, and the finished products are brought into the bag dust collector by the air flow and sent to the finished product warehouse through the pneumatic chute and hoist.

[0003] The influence of materials on mill operation: 1. Mainly manifested in material particle size, grindability and moisture. In the process of vertical mill operation, to form a stable material layer, the material entering the mill must have an appropriate gradation, and more than 95% of the particle size must be less than 3% of the roller diameter. Too large a feed particle size will lead to poor grindability. Since there are not enough fine particles to fill the gaps between large pieces of material, the buffering performance of the material bed is poor, and the impact force of the material crushing is difficult to absorb, resulting in increased vibration of the mill. The feed particle size is too small, especially when there are many powdery materials, because small particles have low friction and good fluidity. Lack of large pieces of material to form a supporting skeleton makes it difficult to form a stable material bed. The grinding roller cannot effectively press and roll the material. A large amount of powdery material will increase the dust concentration and ventilation resistance of the airflow in the mill. When the limit is reached, material collapse will occur, resulting in increased vibration of the mill. 2. The grindability of the material is an important factor affecting the output. When the grindability of the material deteriorates, the number of grinding cycles of the material by the vertical mill will increase significantly. Since most of the materials are ground into fine powder, but cannot meet the requirements of finished products and cannot be taken out of the mill by the airflow, as the fine particles on the grinding disc continue to increase, a situation similar to the feed particle size being too fine will occur, the vertical mill pressure difference increases, ventilation is poor, and the external and internal circulation volumes increase significantly. At this time, the material layer will become extremely unstable, the load of the powder selector will increase, the material layer will thicken, and the mill load will increase. If not handled in time, the vibration of the vertical mill will further intensify, and the main motor will be overcurrent. When the operator finds that the material is too fine, especially when the pressure difference in the vertical mill has increased significantly, the feed should be adjusted in time, the grinding pressure and outlet temperature should be reduced, the water spray volume should be increased, and the speed of the powder selector should be appropriately reduced.

[0004] At present, there are the following problems in the operation of vertical mills: 1. The amount of dust in the raw materials is particularly large, especially the slag, which has a light specific gravity and a large amount of dust, resulting in a particularly large dust collection load from the batching station to the mill. At the same time, due to the wear of the dust collector itself, the air locking effect becomes worse. The phenomenon of ash collapse often occurs due to the excessive amount of dust accumulated in the dust collector. A large amount of fine powder enters the mill instantly, impacting the material layer, making the material layer thinner, and the pressure difference of the mill instantly increases, causing the mill to vibrate violently, causing the roller to lift or even the main motor of the mill to trip and stop. 2. The fly ash unloading consists of a pneumatic arc valve and a punch plate flowmeter. Because the fly ash has particularly good fluidity and there is agglomeration, the material unloading stability is poor and there is a rushing phenomenon. When the rushing amount is large, it will also cause the pressure difference of the mill to rise rapidly, causing the mill to vibrate violently instantly, causing the roller to lift or even the main motor of the mill to trip and stop. 3. The quality of clinker fluctuates greatly. When the grindability of clinker deteriorates, in order to ensure the quality, it is necessary to increase the speed of the powder selector. Excessive speed causes high pressure difference in the mill, increases the internal and external circulation of the mill, and a large amount of powder gathers in the mill, making the material layer very unstable, causing increased vibration of the mill.

[0005] Therefore, when the above problems occur, due to the extremely short time, the operator has no time to stabilize the mill by adjusting the speed, pressure, ventilation and other parameters of the powder selector, causing the mill to vibrate violently instantly, resulting in the lifting of the rollers or even the tripping and stopping of the main motor of the mill, seriously affecting the continuous and stable operation of the mill.

[0006] At present, the main method for dealing with the above situation is manual intervention, where operators adjust various parameters to stabilize the mill, but the effect is far from ideal. There is also an expert system that can make automatic adjustments, but it requires online monitoring instruments and a large number of sensors to support it, which is costly and the effect is not ideal. Summary of the invention

[0007] The present invention provides a cement vertical mill parameter adjustment system and method based on PLC control, which are used to solve the technical problem that the DSC control system in the prior art requires an operator to monitor material changes in real time during the cement vertical mill process, and when an abnormal situation occurs, various parameters cannot be quickly adjusted to the right place, resulting in the mill roller lifting or even the main motor tripping and stopping, and the system cannot make timely responses to large instantaneous changes in the material entering the mill, and the effect is not ideal in actual use. The present invention achieves the technical effect that the system can automatically and instantly adjust various relevant parameters of the mill, stabilize the mill, avoid the situation of lifting rollers or even tripping and stopping the main motor of the mill, and improve the equipment operation rate.

[0008] In a first aspect, the present invention provides a cement vertical mill parameter adjustment system based on PLC control, wherein the cement vertical mill parameter adjustment system is communicatively connected to the cement vertical mill equipment and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system comprises: a DCS unit, wherein the DCS unit comprises a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button; a PLC control unit, wherein the PLC control unit is communicatively connected to the DCS unit, and wherein the PLC control unit further comprises: a first parameter adjustment module, wherein the first parameter adjustment module is used to adjust the air volume of the cement vertical mill equipment; a second parameter adjustment module, wherein the second parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; a third parameter adjustment module, wherein the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; and a fourth parameter adjustment module, wherein the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment; wherein after receiving the parameter adjustment signal, the PLC control unit performs corresponding parameter adjustments on the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module, and the fourth parameter adjustment module, respectively.

[0009] Preferably, the first parameter adjustment module includes: a first MOVE assignment module, and the first MOVE assignment module is used to complete the assignment operation of the fan valve opening of the cement vertical mill equipment.

[0010] Preferably, the second parameter adjustment module includes: a first SUB subtraction module and a second MOVE assignment module, and the first SUB subtraction module and the second MOVE assignment module are communicatively connected.

[0011] Preferably, the third parameter adjustment module includes: a second SUB subtraction module and a first data type conversion module, and the second SUB subtraction module and the first data type conversion module are communicatively connected; a first DIV division function module and a third MOVE assignment module, and the first DIV division function module and the third MOVE assignment module are communicatively connected.

[0012] Preferably, the fourth parameter adjustment module includes: a fourth MOVE assignment module, and the fourth MOVE assignment module is used to complete the assignment operation of the reverse pressure of the cement vertical mill equipment.

[0013] In the second aspect, the present invention also provides a cement vertical mill parameter adjustment method based on PLC control, which is used for the aforementioned cement vertical mill parameter adjustment system, and the method includes: Step 1: Obtain a first adjustment signal, wherein the first adjustment signal is triggered by pressing a first adjustment button; Step 2: According to the first adjustment signal, the PLC control unit sends a first pulse signal; Step 3: According to the first pulse signal, the first parameter adjustment module adjusts the air volume of the cement vertical mill equipment; Step 4: According to the first pulse signal, the second parameter adjustment module adjusts the rotation speed of the cement vertical mill equipment; Step 5: According to the first pulse signal, the third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment; Step 6: According to the first pulse signal, the fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment.

[0014] Preferably, the first parameter adjustment module adjusts the air volume of the cement vertical mill equipment according to the first pulse signal, specifically including: obtaining a first numerical value, wherein the first numerical value corresponds to 95% of the opening of the fan valve of the cement vertical mill equipment; assigning the first numerical value to the first MW900 address through the first MOVE assignment module of the first parameter adjustment module; after the PLC control unit reads the first MW900 address, it outputs a first control signal to control the actuator to complete the operation of adjusting the air volume.

[0015] Preferably, the second parameter adjustment module adjusts the rotational speed of the cement vertical mill equipment according to the first pulse signal, specifically including: obtaining a second numerical value, wherein the second numerical value corresponds to the first rotational speed value of the cement vertical mill equipment; obtaining a first set value; subtracting the first set value from the second numerical value through the first SUB subtraction module of the second parameter adjustment module to obtain a third numerical value; storing the third numerical value in a first intermediate variable; reading the first intermediate variable through the second MOVE assignment module of the second parameter adjustment module, and assigning the first intermediate variable to the second MW900 address; after the PLC control unit reads the second MW900 address, it outputs a second control signal to control the frequency converter to complete the operation of adjusting the rotational speed.

[0016] Preferably, the third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment according to the first pulse signal, specifically including: obtaining a fourth value, wherein the fourth value corresponds to the forward pressure of the cement vertical mill equipment; obtaining a second set value; subtracting the second set value from the fourth value through the second SUB subtraction module of the third parameter adjustment module to obtain a fifth value; storing the fifth value in a second intermediate variable; after reading the second intermediate variable through the first data type conversion module of the third parameter adjustment module, converting the integer type corresponding to the second intermediate variable into a double-precision floating point number and saving it in the third intermediate variable; after reading the third intermediate variable through the first DIV division function module of the third parameter adjustment module, dividing the value corresponding to the third intermediate variable by the sixth value and saving it in the fourth intermediate variable; after reading the fourth intermediate variable through the third MOVE assignment module of the third parameter adjustment module, assigning the fourth intermediate variable to a third address; after reading the third address, the PLC control unit outputs a third control signal to control the oil pump to complete the operation of adjusting the forward pressure.

[0017] Preferably, according to the first pulse signal, the fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment, specifically including: obtaining a seventh numerical value, wherein the seventh numerical value corresponds to the reverse pressure of the cement vertical mill equipment; assigning the seventh numerical value to a fourth address through a fourth MOVE assignment module of the fourth parameter adjustment module; after the PLC control unit reads the fourth address, it outputs a fourth control signal to control the solenoid valve to open to complete the operation of adjusting the reverse pressure.

[0018] The above one or more technical solutions in the embodiments of the present invention have at least one or more of the following technical effects:

[0019] An embodiment of the present invention provides a cement vertical mill parameter adjustment system and method based on PLC control, wherein the cement vertical mill parameter adjustment system is communicatively connected to the cement vertical mill equipment and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system comprises: a DCS unit, wherein the DCS unit comprises a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button; a PLC control unit, wherein the PLC control unit is communicatively connected to the DCS unit, and wherein the PLC control unit further comprises: a first parameter adjustment module, wherein the first parameter adjustment module is used to adjust the air volume of the cement vertical mill equipment; a second parameter adjustment module, wherein the second parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; a third parameter adjustment module, wherein the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; and a fourth parameter adjustment module, wherein the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment; wherein after receiving the parameter adjustment signal, the PLC control unit performs corresponding parameter adjustment on the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module, and the fourth parameter adjustment module, respectively. Therefore, under normal circumstances, the mill operator can control the mill through the DCS system, and adjust the grinding pressure, powder selector speed and other related parameters according to the material changes and product quality. When there is a large instantaneous change in the material, the operator only needs to click the "one-key adjustment" button on the DCS screen, and the system will instantly and automatically adjust the grinding pressure, powder selector speed, air volume and other related parameters to achieve instantaneous stabilization of the mill, avoid the situation of lifting the roller or even tripping and stopping the main motor of the mill, and improve the operation rate of the equipment. This solves the DSC control system in the prior art, which requires the operator to monitor the material changes in real time during the cement vertical mill process, and cannot quickly adjust the various parameters in place when abnormal conditions occur, resulting in the mill lifting the roller or even tripping and stopping the main motor, and at the same time cannot respond to the large instantaneous changes in the material entering the mill in a timely manner, and the actual effect is not ideal. The technical effect of the system being able to instantly and automatically adjust the relevant parameters of the mill, achieving a stable mill, avoiding the situation of lifting the roller or even tripping and stopping the main motor of the mill, and improving the operation rate of the equipment is achieved.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a cement vertical mill parameter adjustment system based on PLC control in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a DCS operation screen of a cement vertical mill parameter adjustment system based on PLC control in an embodiment of the present invention;

[0023] Figure 3 Another structural schematic diagram of a cement vertical mill parameter adjustment system based on PLC control in an embodiment of the present invention;

[0024] Figure 4 This is a control wiring diagram of a fan valve opening system of a cement vertical mill parameter adjustment system based on PLC control in an embodiment of the present invention;

[0025] Figure 5 This is a wiring diagram of adjusting the speed of a powder selector in a cement vertical mill parameter adjustment system based on PLC control in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the forward pressure regulation wiring of a cement vertical mill parameter regulation system based on PLC control in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of reverse pressure regulation wiring of a cement vertical mill parameter regulation system based on PLC control in an embodiment of the present invention;

[0028] Figure 8 The present invention is a flow chart of a method for adjusting cement vertical mill parameters based on PLC control.

[0029] Description of reference numerals:

[0030] PLC control unit 1, first MOVE assignment module 2, first SUB subtraction module 3, second MOVE assignment module 4, second SUB subtraction module 5, first data type conversion module 6, first DIV division function module 7, third MOVE assignment module 8, fourth MOVE assignment module 9. DETAILED DESCRIPTION

[0031] The embodiment of the present invention provides a cement vertical mill parameter adjustment system and method based on PLC control, which is used to solve the technical problem that the DSC control system in the prior art requires the operator to monitor the material changes in real time during the cement vertical mill process, and when an abnormal situation occurs, the various parameters cannot be adjusted quickly, resulting in the mill roller lifting or even the main motor tripping and stopping. At the same time, it cannot respond in time to the instantaneous large changes of the material entering the mill, and the effect is not ideal in actual use.

[0032] The technical solution in the embodiment of the present invention has the following general idea:

[0033] The embodiment of the present invention provides a cement vertical mill parameter adjustment system and method based on PLC control, wherein the cement vertical mill parameter adjustment system is connected to the cement vertical mill equipment for communication and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system comprises: a DCS unit, wherein the DCS unit comprises a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button; a PLC control unit, wherein the PLC control unit is connected to the DCS unit for communication, and wherein the PLC control unit further comprises: a first parameter adjustment module, wherein the first parameter adjustment module is used to adjust the air flow rate of the cement vertical mill equipment; a second parameter adjustment module, wherein the second parameter adjustment module The first parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment; wherein, after the PLC control unit receives the parameter adjustment signal, it respectively adjusts the corresponding parameters of the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module, and the fourth parameter adjustment module, so as to achieve the technical effect that the system can automatically adjust the relevant parameters of the mill instantly, stabilize the mill, avoid the situation of lifting the roller or even stopping the main motor of the mill, and improve the equipment operation rate.

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0035] Embodiment 1

[0036] like Figure 1 As shown, the present invention provides a cement vertical mill parameter adjustment system based on PLC control, the cement vertical mill parameter adjustment system is connected to the cement vertical mill equipment for communication and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system specifically includes:

[0037] A DCS unit, wherein the DCS unit comprises a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button.

[0038] Specifically, the DCS unit is a distributed control system (DCS), which adopts the basic design concept of decentralized control and centralized operation and management, and adopts a multi-level hierarchical, cooperative and autonomous structure. Its main features are its centralized management and decentralized control. At present, DCS has been widely used in various industries such as electricity, metallurgy, and petrochemicals. The DCS unit in this embodiment is provided with a first adjustment button, such as Figure 2 As shown in the figure, the first adjustment button is the "one-key parameter adjustment" button. That is to say, in actual use, when the mill operator can control the mill through the DCS system under normal circumstances, he can adjust the grinding pressure, powder selector speed and other related parameters according to the material changes and product quality. When there is a large instantaneous change in the material, the operator only needs to click the "one-key parameter adjustment" button on the DCS screen, and the system will automatically adjust the grinding pressure, powder selector speed, air volume and other related parameters instantly, so as to further achieve instantaneous stabilization of the mill, avoid the situation of lifting the roller or even stopping the main motor of the mill, and improve the technical effect of the operation rate of the equipment.

[0039] A PLC control unit 1 is communicatively connected with the DCS unit.

[0040] Specifically, the PLC control unit 1 is a programmable logic controller (PLC), which is a digital operation controller with a microprocessor for automatic control. The control instructions can be loaded into the memory at any time for storage and execution. The programmable controller is composed of functional units such as CPU, instruction and data memory, input / output interface, power supply, digital analog conversion, etc. In this embodiment, the PLC automatic control program can communicate with the DCS unit, and establish a "one-key parameter adjustment" variable in the PLC program, which corresponds to the upper DCS configuration software. When the operator presses the "one-key parameter adjustment" button on the DCS screen, the "one-key parameter adjustment" variable in the lower software sends a pulse signal, so that the corresponding parameters can be automatically adjusted through the subsequent operation function blocks.

[0041] Furthermore, the PLC control unit 1 further comprises: a first parameter adjustment module, the first parameter adjustment module being used to adjust the air flow rate of the cement vertical mill equipment;

[0042] Furthermore, the first parameter adjustment module includes: a first MOVE assignment module 2, and the first MOVE assignment module 2 is used to complete the assignment operation of the fan valve opening of the cement vertical mill equipment.

[0043] Specifically, the PLC control unit 1 in this embodiment includes a first parameter adjustment module, through which the purpose of automatically adjusting the air volume can be achieved, such as Figure 3 As shown, specifically: the first parameter adjustment module also includes a first MOVE assignment module 2, through which the assignment operation of the fan valve opening of the cement vertical mill equipment can be completed. Figure 4 As shown, for example, the value 15200 can be assigned to %MW900 (fan valve opening setting) through the first MOVE assignment module 2, wherein the value 15200 can be calculated according to actual needs, corresponding to 95% of the fan valve opening. Then, the PLC outputs a 4-20MA control signal to control the actuator action, thereby achieving the purpose of automatically adjusting the air volume.

[0044] Furthermore, the PLC control unit 1 further comprises: a second parameter adjustment module, the second parameter adjustment module being used to adjust the rotation speed of the cement vertical mill equipment;

[0045] Furthermore, the second parameter adjustment module includes: a first SUB subtraction module 3 and a second MOVE assignment module 4, and the first SUB subtraction module 3 and the second MOVE assignment module 4 are communicatively connected with each other.

[0046] Specifically, the PLC control unit 1 in this embodiment also includes a second parameter adjustment module, through which the purpose of automatically adjusting the speed of the powder selector can be achieved. Specifically: the second parameter adjustment module also includes a first SUB subtraction module 3 and a second MOVE assignment module 4, such as Figure 5 As shown, for example, the SUB subtraction function block uses %MW562 (the speed feedback value of the powder selector during the current operation) to subtract the value 1335 (calculated according to actual needs, corresponding to a 100-rpm reduction in the powder selector speed), and saves the value in the intermediate variable "powder selector speed instantaneous adjustment", that is, the adjusted powder selector speed value is temporarily saved in the variable "powder selector speed instantaneous adjustment", and then the "powder selector speed instantaneous adjustment" is assigned to %MW910 (powder selector speed setting) through the second MOVE assignment module 4, that is, the value of this variable is read through the second MOVE assignment module 4 and transmitted to the address %MW910, and then the 4-20MA control signal is output through the PLC to control the speed of the inverter, thereby achieving the purpose of automatically adjusting the speed of the powder selector.

[0047] Furthermore, the PLC control unit 1 further comprises: a third parameter adjustment module, the third parameter adjustment module being used to adjust the forward pressure of the cement vertical mill equipment;

[0048] Furthermore, the third parameter adjustment module includes: a second SUB subtraction module 5 and a first data type conversion module 6, and the second SUB subtraction module 5 and the first data type conversion module 6 are communicatively connected; a first DIV division function module 7 and a third MOVE assignment module 8, and the first DIV division function module 7 and the third MOVE assignment module 8 are communicatively connected.

[0049] Specifically, if Figure 6 As shown, the PLC control unit 1 also includes a third parameter adjustment module, through which the purpose of automatically adjusting the positive pressure can be achieved; further, the third parameter adjustment module includes a second SUB subtraction module 5, a first data type conversion module 6, a first DIV division function module 7 and a third MOVE assignment module 8, specifically: the second SUB subtraction module 5 and the first data type conversion module 6 are communicated with each other; the first DIV division function module 7 and the third MOVE assignment module 8 are communicated with each other. For example, the SUB subtraction function block uses %MW652 (the forward pressure feedback value of the equipment during the current operation) to subtract the value 1000 (calculated according to actual needs, corresponding to a positive pressure reduction of 5Bar), and then saves the value in the intermediate variable "forward pressure instantaneous adjustment", and then uses the first data type conversion module 6, that is, the INT_TO_REAL data type conversion function block to convert the integer type into a double-precision floating point number, and then saves the value in the intermediate variable "positive pressure instantaneous adjustment", and then uses the DIV division function block to divide the "positive pressure instantaneous adjustment" by 100 (for unit conversion) and save it in the intermediate variable "_positive pressure instantaneous adjustment", and then uses the MOVE assignment function block to assign "_positive pressure instantaneous adjustment" to "_SET031" (forward pressure setting), and outputs the drive signal and control signal through the PLC to control the speed regulation of the oil pump, thereby achieving the purpose of automatically adjusting the forward pressure.

[0050] Furthermore, the PLC control unit 1 further includes: a fourth parameter adjustment module 14, the fourth parameter adjustment module 14 is used to adjust the reverse pressure of the cement vertical mill equipment;

[0051] Furthermore, the fourth parameter adjustment module includes: a fourth MOVE assignment module 9, and the fourth MOVE assignment module 9 is used to complete the assignment operation of the reverse pressure of the cement vertical mill equipment.

[0052] After receiving the parameter adjustment signal, the PLC control unit 1 performs corresponding parameter adjustment on the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module and the fourth parameter adjustment module respectively.

[0053] Specifically, if Figure 7As shown, the PLC control unit 1 also includes a fourth parameter adjustment module 14, through which the purpose of automatically adjusting the reverse pressure can be achieved. In this embodiment, the fourth parameter adjustment module 14 mainly includes a fourth MOVE assignment module 9, and the assignment operation of the reverse pressure of the cement vertical mill equipment is realized through the fourth MOVE assignment module 9. For example, 30 (reverse pressure) is assigned to "_SET033" (reverse pressure setting) through the fourth MOVE assignment module 9, and the drive signal is output through the PLC to control the solenoid valve to open, thereby achieving the purpose of automatically adjusting the reverse pressure.

[0054] Therefore, in this embodiment, by establishing a "one-key parameter adjustment" variable in the PLC programming software, allocating a memory address, and establishing a "one-key parameter adjustment" variable in the upper DCS software corresponding to it, a DCS screen can be drawn for operator operation. When the operator presses the "one-key parameter adjustment" button on the screen, the variable of "one-key parameter adjustment" in the lower software sends a pulse signal, so that the corresponding parameters can be automatically adjusted through the subsequent calculation function block. For example: reduce the speed of the powder selector by 100 revolutions, increase the reverse pressure by 10Bar, etc., and the parameters to be adjusted and the size of the adjustment range can be set according to the specific situation. Through experiments, generally by adjusting the speed of the powder selector (reducing 100 revolutions), increasing the reverse pressure (10Bar), and reducing the forward pressure (5Bar), the violent vibration of the mill caused by material problems can basically be solved, so that the pressure difference and material layer of the mill are relatively stable, and the vibration amplitude is within a controllable range. If the material changes are particularly large, clicking the "one-key parameter adjustment" function button is not enough to stabilize the mill, which can be achieved by multiple clicks. In order to adapt to more working environments and material conditions, several "one-key parameter adjustment" function buttons with different intensity levels can also be set, such as: Level 1 increases the reverse pressure by 5Bar and reduces the forward pressure by 3Bar; Level 2 increases the reverse pressure by 10Bar and reduces the forward pressure by 5Bar; Level 3 increases the reverse pressure by 10Bar, reduces the forward pressure by 5Bar, and reduces the powder selector speed by 100 rpm; Level 4 increases the reverse pressure by 10Bar, reduces the forward pressure by 5Bar, reduces the powder selector speed by 100 rpm, and increases the exhaust fan (increases the inlet air door opening by 5%), etc. Through different levels of "one-key parameter adjustment" functions, various material environments can be adapted to achieve the purpose of instantly adjusting mill parameters, stabilizing working conditions, reducing vibration, and improving mill operation rate.

[0055] All the above values ​​can be set according to the actual production situation. Through the above program, the air volume, powder selector speed, forward pressure and reverse pressure can be automatically adjusted to adapt to various material environments, so as to achieve the technical effect of instantly adjusting the mill parameters, stabilizing the working conditions, reducing vibration and improving the mill operation rate.

[0056] Embodiment 2

[0057] Figure 8 Flow chart of a cement vertical mill parameter adjustment method based on PLC control in an embodiment of the present invention, which is used to prepare the cement vertical mill parameter adjustment system in the aforementioned embodiment 1. Figure 1 , 2 As shown, the method includes:

[0058] Step 1: Obtain a first adjustment signal, wherein the first adjustment signal is triggered by pressing a first adjustment button;

[0059] Step 2: According to the first adjustment signal, the PLC control unit sends a first pulse signal.

[0060] Specifically, the following problems exist in the operation of vertical mills: 1. The amount of dust in raw materials is particularly large, especially slag, which has a light specific gravity and a large amount of dust, resulting in a particularly large dust collection load from the batching station to the mill. At the same time, due to the wear of the dust collector itself, the air locking effect becomes worse. Ash collapse often occurs due to the excessive amount of dust accumulated in the dust collector. A large amount of fine powder enters the mill instantly, impacting the material layer, making the material layer thinner, and the pressure difference of the mill instantly increases, causing the mill to vibrate violently, causing the roller to lift or even the main motor of the mill to trip and stop. 2. The fly ash unloading consists of a pneumatic arc valve and a punch plate flowmeter. Because the fly ash has particularly good fluidity and there is agglomeration, the material unloading stability is poor and there is a rushing phenomenon. When the rushing amount is large, it will also cause the pressure difference of the mill to rise rapidly, causing the mill to vibrate violently instantly, causing the roller to lift or even the main motor of the mill to trip and stop. 3. The quality of clinker fluctuates greatly. When the grindability of clinker deteriorates, in order to ensure the quality, the speed of the powder selector needs to be increased. Excessive speed causes high pressure difference of the mill, and the internal and external circulation of the mill increases. A large amount of powder gathers in the mill, making the material layer very unstable, causing increased vibration of the mill. When the cement vertical mill undergoes a large change in the material entering the mill, which is reflected in the sudden changes in the current of the belt conveyor entering the mill, the pressure difference of the mill, the vibration of the mill, etc., the operator only needs to click the mouse, and the control system will automatically complete the rest. It can quickly stabilize the mill, reduce vibration, avoid lifting rollers and mill tripping, reduce damage to the equipment, and improve the equipment operation rate. According to the actual situation of the material, it is very convenient to modify the various control parameters in the automatic control to control the control range and adapt to the changes of different materials.

[0061] Therefore, when the above problems occur, the operator needs to click the "one-key parameter adjustment" button on the DCS screen, and the system will automatically adjust the relevant parameters of the mill in an instant to achieve the purpose of stabilizing the mill. Therefore, the first adjustment signal is the signal for adjusting the relevant parameters of the cement vertical mill equipment. When an abnormal situation occurs, when the operator presses the first adjustment button on the screen, the variable of the "one-key parameter adjustment" in the PLC control unit sends a pulse signal, so that the corresponding parameters are automatically adjusted through the subsequent calculation function blocks.

[0062] Step 3: According to the first pulse signal, the first parameter adjustment module adjusts the air volume of the cement vertical mill equipment.

[0063] Furthermore, according to the first pulse signal, the first parameter adjustment module adjusts the air volume of the cement vertical mill equipment, specifically including: obtaining a first numerical value, wherein the first numerical value corresponds to 95% of the opening of the fan valve of the cement vertical mill equipment; assigning the first numerical value to the first MW900 address through the first MOVE assignment module 2 of the first parameter adjustment module; after the PLC control unit 1 reads the first MW900 address, it outputs a first control signal to control the actuator to complete the operation of adjusting the air volume.

[0064] Specifically, after the PLC control unit 1 sends out the first pulse signal, the corresponding operation function block will automatically adjust the corresponding parameters. The specific process of the first parameter adjustment module adjusting the air volume of the cement vertical mill equipment is: obtaining a first value, wherein the first value corresponds to 95% of the fan valve opening of the cement vertical mill equipment; then, through the first MOVE assignment module of the first parameter adjustment module, the first value is assigned to the first MW900 address; then after the PLC control unit 1 reads the value of the first MW900 address, it outputs the first control signal, thereby controlling the actuator to complete the operation of adjusting the air volume, and further achieving the technical effect of automatically adjusting the air volume of the cement vertical mill. For example: through the first MOVE assignment module 2, the value 15200 can be assigned to %MW900 (fan valve opening setting), wherein the value 15200 can be calculated according to actual needs, corresponding to 95% of the fan valve opening. Then, the 4-20MA control signal is output through the PLC to control the action of the actuator, thereby achieving the purpose of automatically adjusting the air volume.

[0065] Step 4: According to the first pulse signal, the second parameter adjustment module adjusts the rotation speed of the cement vertical mill equipment.

[0066] Furthermore, according to the first pulse signal, the second parameter adjustment module adjusts the rotational speed of the cement vertical mill equipment, specifically including: obtaining a second numerical value, wherein the second numerical value corresponds to the first rotational speed value of the cement vertical mill equipment; obtaining a first set value; through the first SUB subtraction module 3 of the second parameter adjustment module, subtracting the first set value from the second numerical value and obtaining a third numerical value; storing the third numerical value in a first intermediate variable; through the second MOVE assignment module 4 of the second parameter adjustment module, reading the first intermediate variable, and assigning the first intermediate variable to the second MW900 address; after the PLC control unit reads the second MW900 address, it outputs a second control signal to control the frequency converter to complete the operation of adjusting the rotational speed.

[0067] Specifically, after the PLC control unit 1 sends out the first pulse signal, the second parameter adjustment module will adjust the speed of the cement vertical mill equipment. The specific process of the second parameter adjustment module adjusting the speed of the cement vertical mill equipment is as follows: obtain a second numerical value, wherein the second numerical value corresponds to the first speed value of the cement vertical mill equipment, that is, the second numerical value is the current speed value fed back by the powder selector during operation; then, obtain a first set value, which can be set according to actual production needs, and is not specifically limited in this embodiment; then, through the first SUB subtraction module 3 of the second parameter adjustment module, subtract the first set value from the second numerical value and obtain a third numerical value; further store the third numerical value in the first intermediate variable; then, through the second MOVE assignment module 4 of the second parameter adjustment module, read the value corresponding to the first intermediate variable, and assign the first intermediate variable to the second MW900 address; finally, after the PLC control unit reads the second MW900 address, it outputs a second control signal to control the frequency converter to complete the operation of adjusting the speed, thereby achieving the technical effect of automatically adjusting the speed of the cement vertical mill equipment. For example, through the SUB subtraction function block, %MW562 (the speed feedback value of the powder selector during the current operation) is subtracted from the value 1335 (calculated according to actual needs, corresponding to a reduction of 100 revolutions in the powder selector speed), and the value is saved in the intermediate variable "powder selector speed instantaneous adjustment", that is, the adjusted powder selector speed value is temporarily saved in the variable "powder selector speed instantaneous adjustment", and then the "powder selector speed instantaneous adjustment" is assigned to %MW910 (powder selector speed setting) through the second MOVE assignment module 4, that is, the value of this variable is read through the second MOVE assignment module 4 and transmitted to %MW910, and then the 4-20MA control signal is output through the PLC to control the speed regulation of the frequency converter, thereby achieving the purpose of automatically adjusting the speed of the powder selector.

[0068] Step 5: According to the first pulse signal, the third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment;

[0069] Furthermore, according to the first pulse signal, the third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment, specifically including: obtaining a fourth value, wherein the fourth value corresponds to the forward pressure of the cement vertical mill equipment; obtaining a second set value; through the second SUB subtraction module 5 of the third parameter adjustment module, subtracting the second set value from the fourth value and obtaining a fifth value; storing the fifth value in a second intermediate variable; through the first data type conversion module 6 of the third parameter adjustment module, after reading the second intermediate variable, converting the integer type corresponding to the second intermediate variable into a double-precision floating point number and saving it in the third intermediate variable; through the first DIV division function module 7 of the third parameter adjustment module, after reading the third intermediate variable, dividing the value corresponding to the third intermediate variable by the sixth value and saving it in the fourth intermediate variable; through the third MOVE assignment module 8 of the third parameter adjustment module, reading the fourth intermediate variable, and assigning the fourth intermediate variable to a third address; after reading the third address, the PLC control unit 1 outputs a third control signal to control the oil pump to complete the operation of adjusting the forward pressure.

[0070] Specifically, in this embodiment, the forward pressure of the cement vertical mill equipment can be regulated by the third parameter adjustment module. The specific process is: first, a fourth value needs to be obtained, wherein the fourth value corresponds to the forward pressure of the cement vertical mill equipment, that is, the fourth value is the current forward pressure feedback value of the cement vertical mill equipment; then, a second set value needs to be obtained, and the second set value can be set according to actual production needs, and no specific restrictions are made in this embodiment; then, through the second SUB subtraction module 5 of the third parameter adjustment module, the fourth value is subtracted from the second set value to obtain a fifth value; the fifth value is temporarily stored in the second intermediate variable; then, through the first data type conversion module 6 of the third parameter adjustment module, the value corresponding to the second intermediate variable is read. After that, the integer type corresponding to the second intermediate variable is converted into a double-precision floating point number and saved in the third intermediate variable; then, through the first DIV division function module 7 of the third parameter adjustment module, after reading the value corresponding to the third intermediate variable, the value corresponding to the third intermediate variable is divided by the sixth value and saved in the fourth intermediate variable, wherein the sixth value can also be set according to actual needs, and there is no specific restriction in this implementation; further, through the third MOVE assignment module 8 of the third parameter adjustment module, after reading the value corresponding to the fourth intermediate variable, the fourth intermediate variable is assigned to the third address; finally, after reading the third address through the PLC control unit 1, the third control signal is output, so as to achieve the technical effect of controlling the oil pump to complete the operation of adjusting the forward pressure. For example, the SUB subtraction function block uses %MW652 (the forward pressure feedback value of the equipment during the current operation) to subtract the value 1000 (calculated according to actual needs, corresponding to a positive pressure reduction of 5Bar), and then saves the value in the intermediate variable "forward pressure instantaneous adjustment", and then uses the first data type conversion module 6, that is, the INT_TO_REAL data type conversion function block to convert the integer type into a double-precision floating point number, and then saves the value in the intermediate variable "positive pressure instantaneous adjustment", and then uses the DIV division function block to divide the "positive pressure instantaneous adjustment" by 100 (for unit conversion) and save it in the intermediate variable "_positive pressure instantaneous adjustment", and then uses the MOVE assignment function block to assign "_positive pressure instantaneous adjustment" to "_SET031" (forward pressure setting), and outputs the drive signal and control signal through the PLC to control the speed regulation of the oil pump, thereby achieving the purpose of automatically adjusting the forward pressure.

[0071] Step 6: According to the first pulse signal, the fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment.

[0072] Furthermore, according to the first pulse signal, the fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment, specifically including: obtaining a seventh numerical value, wherein the seventh numerical value corresponds to the reverse pressure of the cement vertical mill equipment; assigning the seventh numerical value to a fourth address through the fourth MOVE assignment module of the fourth parameter adjustment module; after the PLC control unit reads the fourth address, it outputs a fourth control signal to control the solenoid valve to open to complete the operation of adjusting the reverse pressure.

[0073] Specifically, in this embodiment, the reverse pressure of the cement vertical mill equipment can be adjusted through the fourth parameter adjustment module, and the specific process is: obtain the seventh value, wherein the seventh value corresponds to the reverse pressure of the cement vertical mill equipment, that is, the seventh value is the current reverse pressure feedback value of the cement vertical mill equipment; then, through the fourth MOVE assignment module 9 of the fourth parameter adjustment module, the seventh value is assigned to the fourth address; then, after the fourth address is read by the PLC control unit, the fourth control signal is output, so as to achieve the purpose of controlling the solenoid valve to open to complete the adjustment of the reverse pressure. For example, 30 (reverse pressure) is assigned to "_SET033" (reverse pressure setting) through the fourth MOVE assignment module 9, and the driving signal is output through the PLC to control the solenoid valve to open, so as to achieve the purpose of automatically adjusting the reverse pressure.

[0074] All the above values ​​can be set according to the actual production situation. Through the above program, the air volume, powder selector speed, forward pressure and reverse pressure can be automatically adjusted to adapt to various material environments, so as to achieve the purpose of instantly adjusting the mill parameters, stabilizing the working conditions, reducing vibration and improving the mill operation rate.

[0075] At present, the DCS control system used in cement vertical mills requires the operator to monitor the material changes in real time and manually adjust the relevant parameters of the mill system. In the case of particularly large changes in materials, there is no way to quickly adjust the parameters, resulting in the mill lifting rollers or even the main motor tripping and stopping. The other is the expert system that uses an online monitor to monitor the cement quality in real time and automatically adjust the mill related parameters and mill ingredients according to the quality. It cannot respond to the large instantaneous changes in the material entering the mill in a timely manner, and the effect in actual use is not ideal.

[0076] Therefore, in this embodiment, the mill operator can control the mill through the DCS system under normal circumstances, and adjust the grinding pressure, powder selector speed and other related parameters according to material changes and product quality conditions. When there is a large instantaneous change in material, the operator only needs to click the "one-key parameter adjustment" button on the DCS screen, and the system will automatically adjust the grinding pressure, powder selector speed, air volume and other related parameters instantly to achieve instantaneous stabilization of the mill, avoid lifting of the roller or even tripping and stopping of the main motor of the mill, and improve the operation rate of the equipment.

[0077] It further ensures the normal and stable operation of the mill under different material conditions, reduces damage to the mill, and improves the equipment operation rate. It solves the above problems existing in the current cement vertical mill and is suitable for situations where the cement vertical mill material changes greatly, has a wide range of applications, and has good effects.

[0078] The above one or more technical solutions in the embodiments of the present invention have at least one or more of the following technical effects:

[0079] An embodiment of the present invention provides a cement vertical mill parameter adjustment system and method based on PLC control, wherein the cement vertical mill parameter adjustment system is communicatively connected to the cement vertical mill equipment and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system comprises: a DCS unit, wherein the DCS unit comprises a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button; a PLC control unit, wherein the PLC control unit is communicatively connected to the DCS unit, and wherein the PLC control unit further comprises: a first parameter adjustment module, wherein the first parameter adjustment module is used to adjust the air volume of the cement vertical mill equipment; a second parameter adjustment module, wherein the second parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; a third parameter adjustment module, wherein the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; and a fourth parameter adjustment module, wherein the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment; wherein after receiving the parameter adjustment signal, the PLC control unit performs corresponding parameter adjustment on the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module, and the fourth parameter adjustment module, respectively. Therefore, under normal circumstances, the mill operator can control the mill through the DCS system, and adjust the grinding pressure, powder selector speed and other related parameters according to the material changes and product quality. When there is a large instantaneous change in the material, the operator only needs to click the "one-key adjustment" button on the DCS screen, and the system will instantly and automatically adjust the grinding pressure, powder selector speed, air volume and other related parameters to achieve instantaneous stabilization of the mill, avoid the situation of lifting the roller or even tripping and stopping the main motor of the mill, and improve the operation rate of the equipment. This solves the DSC control system in the prior art, which requires the operator to monitor the material changes in real time during the cement vertical mill process, and cannot quickly adjust the various parameters in place when abnormal conditions occur, resulting in the mill lifting the roller or even tripping and stopping the main motor, and at the same time cannot respond to the large instantaneous changes in the material entering the mill in a timely manner, and the actual effect is not ideal. The technical effect of the system being able to instantly and automatically adjust the relevant parameters of the mill, achieving a stable mill, avoiding the situation of lifting the roller or even tripping and stopping the main motor of the mill, and improving the operation rate of the equipment is achieved.

[0080] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0081] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cement vertical mill parameter adjustment system based on PLC control, characterized in that: The cement vertical mill parameter adjustment system is in communication connection with the cement vertical mill equipment and is used to adjust the parameters of the cement vertical mill equipment, wherein the cement vertical mill parameter adjustment system includes: A DCS unit, the DCS unit comprising a first adjustment button, wherein a parameter adjustment signal is sent by pressing the first adjustment button; A PLC control unit, wherein the PLC control unit is communicatively connected with the DCS unit, and the PLC control unit further comprises: A first parameter adjustment module, the first parameter adjustment module is used to adjust the air volume of the cement vertical mill equipment, wherein the first parameter adjustment module includes: a first MOVE assignment module, the first MOVE assignment module is used to complete the assignment operation of the fan valve opening of the cement vertical mill equipment; A second parameter adjustment module, wherein the second parameter adjustment module is used to adjust the rotation speed of the cement vertical mill equipment; A third parameter adjustment module, the third parameter adjustment module is used to adjust the forward pressure of the cement vertical mill equipment; A fourth parameter adjustment module, the fourth parameter adjustment module is used to adjust the reverse pressure of the cement vertical mill equipment; Wherein, after receiving the parameter adjustment signal, the PLC control unit respectively adjusts the corresponding parameters of the cement vertical mill equipment through the first parameter adjustment module, the second parameter adjustment module, the third parameter adjustment module, and the fourth parameter adjustment module; Wherein, the second parameter adjustment module comprises: a first SUB subtraction module and a second MOVE assignment module, and the first SUB subtraction module and the second MOVE assignment module are communicatively connected with each other; Wherein, the third parameter adjustment module includes: A second SUB subtraction module and a first data type conversion module, wherein the second SUB subtraction module and the first data type conversion module are communicatively connected with each other; A first DIV division function module and a third MOVE value assignment module, wherein the first DIV division function module and the third MOVE value assignment module are communicatively connected with each other; Wherein, the fourth parameter adjustment module includes: a fourth MOVE assignment module, and the fourth MOVE assignment module is used to complete the assignment operation of the reverse pressure of the cement vertical mill equipment.

2. A cement vertical mill parameter adjustment method based on PLC control, used in the cement vertical mill parameter adjustment system as claimed in claim 1, characterized in that: The method comprises: Step 1: Obtain a first adjustment signal, wherein the first adjustment signal is triggered by pressing a first adjustment button; Step 2: According to the first adjustment signal, the PLC control unit sends a first pulse signal; Step 3: According to the first pulse signal, the first parameter adjustment module adjusts the air flow rate of the cement vertical mill equipment; Step 4: According to the first pulse signal, the second parameter adjustment module adjusts the rotation speed of the cement vertical mill equipment; Step 5: According to the first pulse signal, the third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment; Step 6: According to the first pulse signal, the fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment; Wherein, the first parameter adjustment module adjusts the air volume of the cement vertical mill equipment according to the first pulse signal, specifically including: Obtaining a first value, wherein the first value corresponds to 95% of the opening of a fan valve of the cement vertical mill equipment; Assigning the first value to the first MW900 address through the first MOVE assignment module of the first parameter adjustment module; After reading the first MW900 address, the PLC control unit outputs a first control signal to control the actuator to complete the operation of adjusting the air volume.

3. The cement vertical mill parameter adjustment method according to claim 2, characterized in that: The second parameter adjustment module adjusts the rotation speed of the cement vertical mill equipment according to the first pulse signal, specifically including: Obtaining a second value, wherein the second value corresponds to the first rotational speed value of the cement vertical mill equipment; obtaining a first set value; Subtracting the first set value from the second value by the first SUB subtraction module of the second parameter adjustment module to obtain a third value; Storing the third value in a first intermediate variable; Through the second MOVE assignment module of the second parameter adjustment module, after reading the first intermediate variable, the first intermediate variable is assigned to the second MW900 address; After reading the second MW900 address, the PLC control unit outputs a second control signal to control the frequency converter to complete the operation of adjusting the speed.

4. The cement vertical mill parameter adjustment method according to claim 2, characterized in that: The third parameter adjustment module adjusts the forward pressure of the cement vertical mill equipment according to the first pulse signal, specifically including: Obtaining a fourth value, wherein the fourth value corresponds to the forward pressure of the cement vertical mill equipment; obtaining a second set value; Subtracting the second set value from the fourth value by the second SUB subtraction module of the third parameter adjustment module to obtain a fifth value; Storing the fifth value in a second intermediate variable; After reading the second intermediate variable, the first data type conversion module of the third parameter adjustment module converts the integer type corresponding to the second intermediate variable into a double-precision floating point number and stores it in the third intermediate variable; After reading the third intermediate variable through the first DIV division function module of the third parameter adjustment module, the value corresponding to the third intermediate variable is divided by the sixth value and stored in the fourth intermediate variable; The third MOVE assignment module of the third parameter adjustment module reads the fourth intermediate variable and assigns the fourth intermediate variable to the third address; After reading the third address, the PLC control unit outputs a third control signal to control the oil pump to complete the operation of adjusting the forward pressure.

5. The cement vertical mill parameter adjustment method according to claim 2, characterized in that: The fourth parameter adjustment module adjusts the reverse pressure of the cement vertical mill equipment according to the first pulse signal, specifically including: Obtaining a seventh value, wherein the seventh value corresponds to the reverse pressure of the cement vertical mill equipment; Assigning the seventh value to a fourth address through a fourth MOVE assignment module of the fourth parameter adjustment module; After reading the fourth address, the PLC control unit outputs a fourth control signal to control the solenoid valve to open to complete the operation of adjusting the reverse pressure.

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