Intelligent starting method and device for milling system in the context of flexible start-stop peak shaving

Abstract

The application provides a pulverizing system intelligent starting method for a flexible start-stop peak shaving background, which comprises the following steps: acquiring the working positions of oil pumps of a coal mill lubricating oil station and a hydraulic oil station and the judgment conditions of empty milling and non-empty milling; starting the oil pumps of the working positions of the lubricating oil station and the hydraulic oil station; raising the milling roller, adjusting the outlet door of the coal mill, the sealing air door and the sealing air door of the coal feeder, and adjusting the cold and hot primary air pneumatic regulating valve and the shut-off valve of the coal mill; starting the coal mill and the coal feeder, and adjusting the outlet door and the inlet door of the coal feeder when the coal feeder is started; determining the state of the coal mill according to the judgment conditions of empty milling and non-empty milling, further determining the starting time of the milling roller reduction, reducing the milling roller when the starting time is reached, and putting into the milling roller loading automation, milling, and completing the starting of the pulverizing system. The application adopting the above scheme improves the starting efficiency of the thermal power generating unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent control of generator sets, and particularly to an intelligent starting method and device for a pulverizing system under the background of flexible start-stop peak regulation. BACKGROUND

[0002] With future development, thermal power generator sets will mainly undertake peak regulation tasks, and it is imminent to improve the wide-load peak regulation capability of thermal power generator sets.

[0003] Under the trend of deep peak regulation, thermal power generator sets must further improve the peak regulation and frequency modulation capability of flexible operation. Rapid, large and frequent fluctuations in load will inevitably become the new normal of thermal power generator set operation, and the primary frequency modulation and AGC of the power grid will also become increasingly stringent. The design and debugging of the control system of the thermal power generator set are generally based on the criterion of continuous automatic operation at a load of 50% Pe or more, and therefore, under the condition of deep peak regulation, the automatic control system of the thermal power generator set is facing unprecedented pressure. Under the condition of wider, faster and lower load changes, the nonlinearity and time-varying nature of the regulated object and system are more obvious, and the influence of objective unfavorable factors such as coal quality change and layered blending is further amplified. The existing technology faces many bottlenecks, and the development, research, application, improvement and maintenance of new optimization control technology is one of the core tasks in the technical upgrading and transformation of thermal power plants. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, the first object of the present application is to propose an intelligent starting method for a pulverizing system under the background of flexible start-stop peak regulation, which solves the technical problems of low efficiency and long time consumption of the existing starting method of the thermal power generator set, and effectively improves the starting efficiency of the thermal power generator set.

[0006] The second object of the present application is to propose an intelligent starting device for a pulverizing system under the background of flexible start-stop peak regulation.

[0007] To achieve the above object, the first aspect of the present application proposes a pulverizing system intelligent starting method under the background of flexible start-stop peak regulation, comprising: obtaining the oil pump working position of the coal mill lubricating oil station and the hydraulic oil station, and the judgment condition of empty mill and non-empty mill; starting the oil pump of the lubricating oil station and the hydraulic oil station based on the obtained oil pump working position, so as to meet the oil temperature and oil pressure conditions required by the coal mill starting; adjusting the mill roller, the coal mill outlet door, the sealing air door and the sealing air door of the coal feeder, and adjusting the cold and hot primary air pneumatic regulating valve and the shut-off valve of the coal mill, so as to meet the inlet primary air volume and outlet temperature required by the coal mill starting; starting the coal mill and the coal feeder, and adjusting the outlet door and the inlet door of the coal feeder when starting the coal feeder; determining the state of the coal mill according to the judgment condition of the empty mill and the non-empty mill, and selecting the starting time of the mill roller based on the state of the coal mill, and lowering the mill roller when reaching the starting time, and putting into the mill roller loading automatic, and grinding, to complete the starting of the pulverizing system.

[0008] The pulverizing system intelligent starting method under the background of flexible start-stop peak regulation of the present application can smoothly complete the warm grinding work when starting the coal mill, reasonably arrange the mill roller operation, and minimize the disturbance to the coordinated control system when starting the pulverizing system, so as to realize the safe and efficient starting of the unit, and meet the load demand of the power grid side under the current deep peak regulation background.

[0009] Optionally, in an embodiment of the present application, the coal mill is a roller mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station and a rotary separator, and the coal feeder is a weighing type coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

[0010] Optionally, in an embodiment of the present application, starting the oil pump of the lubricating oil station and the hydraulic oil station based on the obtained oil pump working position comprises:

[0011] starting the oil pump of the obtained lubricating oil station working position;

[0012] putting into the lubricating oil station electric heater interlock;

[0013] putting into the hydraulic oil station electric heater interlock;

[0014] starting the high-speed oil pump of the lubricating oil station and putting into the interlock, and stopping the operation of the lubricating oil station working position oil pump;

[0015] starting the oil pump of the obtained lubricating oil station working position and putting into the interlock.

[0016] Optionally, in an embodiment of the present application, adjusting the coal mill outlet door, the sealing air door and the sealing air door of the coal feeder comprises:

[0017] opening the coal mill outlet door;

[0018] Opening the seal air damper of the coal mill and the seal air damper of the coal feeder, so that the differential pressure of the seal air of the coal mill reaches the preset range;

[0019] Running the rotating separator of the coal mill.

[0020] Optionally, in an embodiment of the present application, the cold and hot primary air pneumatic regulating valves and the shut-off valves of the coal mill are regulated, including:

[0021] Closing the cold and hot primary air pneumatic regulating valves of the coal mill and cutting to the manual position;

[0022] Opening the cold primary air pneumatic shut-off valve of the coal mill;

[0023] Opening the hot primary air pneumatic shut-off valve of the coal mill;

[0024] Performing warm grinding operation on the coal mill to meet the required inlet primary air volume and outlet temperature for starting the coal mill.

[0025] Optionally, in an embodiment of the present application, the warm grinding operation is performed on the coal mill to meet the required inlet primary air volume and outlet temperature for starting the coal mill, including:

[0026] Pre-opening the cold primary air pneumatic regulating valve of the coal mill and putting into automatic to maintain the outlet temperature of the coal mill;

[0027] Putting into automatic of the cold primary air pneumatic regulating valve of the coal mill to maintain the inlet primary air volume of the coal mill.

[0028] Optionally, in an embodiment of the present application, the coal mill and the coal feeder are started, and the outlet door and the inlet door of the coal feeder are regulated when the coal feeder is started, including:

[0029] Starting the coal mill;

[0030] Opening the outlet door of the coal feeder;

[0031] Starting the coal feeder;

[0032] Opening the inlet door of the coal feeder.

[0033] Optionally, in an embodiment of the present application, the automatic of the mill roller loading is put into, including:

[0034] Putting into the automatic of the mill roller loading and counter loading of the coal mill;

[0035] Increasing the coal quantity of the coal feeder to the minimum coal quantity of the coal mill;

[0036] Grinding, including:

[0037] When the fuel master control is in the automatic position, putting into the coal quantity automatic of the coal feeder, and making the coal quantity offset of a single coal feeder zero by limiting the rate.

[0038] To achieve the above object, the second aspect of the present application provides a pulverizing system intelligent starting device for flexible start-stop peak regulation, comprising a data acquisition module, a first starting module, a coal mill adjusting module, a second starting module, and a starting module, wherein,

[0039] The data acquisition module is configured to acquire the working position of the oil pump of the lubricating oil station and the hydraulic oil station and the judgment condition of empty mill and non-empty mill.

[0040] The first starting module is configured to start the oil pump of the lubricating oil station and the hydraulic oil station based on the acquired working position of the oil pump, so as to meet the oil temperature and oil pressure conditions required by the starting of the coal mill.

[0041] The coal mill adjusting module is configured to raise the mill roller, adjust the outlet door, sealing air door of the coal mill, and sealing air door of the coal feeder, and adjust the cold and hot primary air pneumatic adjusting valve and shut-off valve of the coal mill, so as to meet the inlet primary air volume and outlet temperature required by the starting of the coal mill.

[0042] The second starting module is configured to start the coal mill and the coal feeder, and adjust the outlet door and inlet door of the coal feeder when starting the coal feeder.

[0043] The starting module is configured to determine the state of the coal mill according to the judgment condition of empty mill and non-empty mill, select the start time of the mill roller based on the state of the coal mill, lower the mill roller when the start time is reached, and put into the mill roller loading automation and grinding, so as to complete the starting of the pulverizing system.

[0044] Optionally, in an embodiment of the present application, the coal mill is a roller-type coal mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station, and a rotary separator, and the coal feeder is a weighing-type coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

[0045] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0046] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0047] Figure 1 A flowchart of a pulverizing system intelligent starting method for flexible start-stop peak regulation provided by the first embodiment of the present application;

[0048] Figure 2 A flowchart of a pulverizing system intelligent starting peak regulation control system of the present application;

[0049] Figure 3A structural schematic diagram of an intelligent starting device of a pulverizing system in a flexible start-stop peak shaving background is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0050] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar notations used throughout the drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0051] A pulverizing system intelligent starting method and device in a flexible start-stop peak shaving background of embodiments of the present application are described below with reference to the accompanying drawings.

[0052] Figure 1 A flowchart of a pulverizing system intelligent starting method in a flexible start-stop peak shaving background provided for Embodiment One of the present application.

[0053] As shown in Figure 1 the pulverizing system intelligent starting method in a flexible start-stop peak shaving background includes the following steps:

[0054] Step 101, obtaining the oil pump working position of the coal mill lubricating oil station and the hydraulic oil station, and the judgment condition of the empty mill and the non-empty mill;

[0055] Step 102, starting the oil pump of the lubricating oil station and the hydraulic oil station based on the obtained oil pump working position, so as to meet the oil temperature and oil pressure conditions required for starting the coal mill;

[0056] Step 103, raising the mill roller, adjusting the outlet door, sealing air door of the coal mill, and sealing air door of the coal feeder, and adjusting the cold and hot primary air pneumatic control valve and shut-off valve of the coal mill, so as to meet the inlet primary air volume and outlet temperature required for starting the coal mill;

[0057] Step 104, starting the coal mill and the coal feeder, and adjusting the outlet door and inlet door of the coal feeder when starting the coal feeder;

[0058] Step 105, determining the state of the coal mill according to the judgment condition of the empty mill and the non-empty mill, selecting the start time of lowering the mill roller based on the state of the coal mill, lowering the mill roller when the start time is reached, and putting into the mill roller loading automatic, and grinding, to complete the starting of the pulverizing system.

[0059] The pulverizing system intelligent starting method in a flexible start-stop peak shaving background of embodiments of the present application successfully completes the warm grinding work when starting the coal mill, reasonably arranges the mill roller operation, and tries to reduce the disturbance to the coordinated control system when starting the pulverizing system, finally realizes the safe and efficient starting of the unit, and at the same time meets the load demand of the power grid side in the current deep peak shaving background.

[0060] Optionally, in an embodiment of the present application, the coal mill is a roller mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station and a rotary separator, and the coal feeder is a weighing coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

[0061] Optionally, in an embodiment of the present application, the oil pump of the lubricating oil station and the hydraulic oil station is started based on the obtained working position of the oil pump, and the method comprises the following steps:

[0062] starting the oil pump of the obtained working position of the lubricating oil station;

[0063] putting the lubricating oil station electric heater interlock into operation;

[0064] putting the hydraulic oil station electric heater interlock into operation;

[0065] starting the high-speed oil pump of the lubricating oil station and putting the interlock into operation, and stopping the operation of the working position oil pump of the lubricating oil station;

[0066] starting the oil pump of the obtained working position of the lubricating oil station and putting the interlock into operation.

[0067] Optionally, in an embodiment of the present application, the outlet door of the coal mill, the sealing air door and the sealing air door of the coal feeder are adjusted, and the method comprises the following steps:

[0068] opening the outlet door of the coal mill;

[0069] opening the sealing air door of the coal mill and the sealing air door of the coal feeder, so that the sealing air differential pressure of the coal mill reaches a preset range;

[0070] running the rotary separator of the coal mill.

[0071] Optionally, in an embodiment of the present application, the cold and hot primary air pneumatic regulating valves and the shut-off valves of the coal mill are adjusted, and the method comprises the following steps:

[0072] closing the cold and hot primary air pneumatic regulating valves of the coal mill and cutting to the manual position;

[0073] opening the cold primary air pneumatic shut-off valve of the coal mill;

[0074] opening the hot primary air pneumatic shut-off valve of the coal mill;

[0075] performing a warm grinding operation on the coal mill to meet the required inlet primary air quantity and outlet temperature of the coal mill during startup.

[0076] Optionally, in an embodiment of the present application, a warm grinding operation is performed on the coal mill to meet the required inlet primary air quantity and outlet temperature of the coal mill during startup, and the method comprises the following steps:

[0077] pre-opening the cold primary air pneumatic regulating valve of the coal mill and putting it into automatic operation to maintain the outlet temperature of the coal mill;

[0078] Put in the coal mill cold primary air pneumatic control valve automatic, maintain the coal mill entrance primary air volume.

[0079] Optionally, in an embodiment of the present application, the coal mill and coal feeder are started, and the outlet door and inlet door of the coal feeder are adjusted when the coal feeder is started, comprising:

[0080] Starting the coal mill;

[0081] Opening the coal feeder outlet door;

[0082] Starting the coal feeder;

[0083] Opening the coal feeder inlet door.

[0084] Optionally, in an embodiment of the present application, the mill roller loading automatic is put in, comprising:

[0085] Put in the coal mill mill roller loading and counter loading automatic;

[0086] Increase the coal feeder coal quantity to the minimum coal quantity of the coal mill;

[0087] And mill, comprising:

[0088] When the fuel master control is in the automatic position, put in the coal feeder coal quantity automatic, through the rate limiting, make the single coal feeder coal quantity bias zero.

[0089] Figure 2 The intelligent start-up peak regulation control system flow chart for the pulverizing system of the embodiment, by Figure 2 It can be known that when the operator selects to start the intelligent start-up peak regulation control system of the pulverizing system (001), the preparation work (002) needs to be carried out first, including preselecting the oil pump working position of the coal mill lubricating oil station, preselecting the oil pump working position of the coal mill hydraulic oil station, and judging whether the mill is empty or not. After the above confirmation work is completed, it indicates that the control system can be put into operation.

[0090] 1) Step one: start the coal mill oil station electric heater (003);

[0091] The coal mill lubricating oil station operation requirement: before starting the coal mill, start the lubricating oil system first. When the reducer oil pool oil temperature is lower than 28℃, start the low-speed pump first, and at the same time the electric heater starts to work. When the reducer oil pool oil temperature is higher than 28℃, the oil pump is switched from low speed to high speed; when the oil pool oil temperature is higher than 35℃, the heater is cut off. When the oil supply pressure is greater than 0.13MPa, the reducer oil temperature reaches 28℃, and the thrust pad oil pool oil temperature is lower than 50℃, it indicates that the lubricating system program has completed the start-up condition (the lubricating condition is available);

[0092] First step instruction: start the lubricating oil station pump; put in the lubricating oil station electric heater interlock; put in the hydraulic oil station electric heater interlock;

[0093] First step feedback: the lubricating oil station pump is running; the lubricating oil station electric heater interlock has been put in; the hydraulic oil station electric heater interlock has been put in;

[0094] Notes and skills: when the oil temperature of the reducer oil pool is lower than 28℃, start the low-speed pump; when the oil temperature of the reducer oil pool is higher than 28℃, start the high-speed pump. When the lubricating oil station low-speed pump is running or the high-speed pump is running, when the oil temperature of the reducer oil pool is lower than 30℃, first start the lubricating oil station electric heater, then put in the lubricating oil station electric heater interlock, and then automatically start or stop the lubricating oil station electric heater according to the oil pool oil temperature. When the lubricating oil station low-speed pump is running or the high-speed pump is running, when the oil temperature of the reducer oil pool is higher than 30℃, directly put in the lubricating oil station electric heater interlock, and then automatically start or stop the lubricating oil station electric heater according to the oil pool oil temperature. When the lubricating oil station low-speed pump is switched to the high-speed pump, first start the high-speed pump in the other group of pumps, then stop the original running low-speed pump, and during this process, the lubricating oil station electric heater will not trip and can continue to run.

[0095] 2) Step two: start the lubricating oil station high-speed pump and put in the interlock (004);

[0096] Second step instruction: when the oil temperature of the reducer oil pool is higher than 28℃, start the high-speed pump in the other group of pumps; when the oil supply pressure is greater than 0.13MPa, put in the lubricating oil station high-speed pump standby;

[0097] Second step feedback: the lubricating oil station high-speed pump is running; the lubricating oil station high-speed pump standby has been put in; the lubricating oil station meets the requirements of the coal mill start-up conditions, including oil temperature and oil pressure conditions;

[0098] Notes and skills: according to the process requirements and the characteristics of the electrical design circuit, the lubricating oil pump will trip, and the lubricating oil station electric heater will automatically be powered off. Therefore, when the lubricating oil station low-speed pump is switched to the high-speed pump, first start the high-speed pump in the other group of pumps, then stop the original running low-speed pump, and during this process, the lubricating oil station electric heater will not trip and can continue to run.

[0099] 3) Step three: start the hydraulic oil station pump and put in the interlock (005);

[0100] Third step instruction: start the hydraulic oil station working position pump; put in the hydraulic oil station pump standby;

[0101] Third step feedback: the hydraulic oil station pump is running; the hydraulic oil station pump standby has been put in.

[0102] 4) Step four: raise the mill roller (006);

[0103] Fourth step instruction: issue the mill roller raising instruction;

[0104] Fourth step feedback: the mill roller has been raised into position.

[0105] 5) Step five: fully open the mill outlet door (007);

[0106] Fifth step instruction: issue the mill outlet door opening instruction;

[0107] Fifth step feedback: the mill outlet door is fully open.

[0108] 6) Step six: open the mill seal air door, the coal feeder seal air door (008);

[0109] Sixth step instruction: open the mill seal air door; open the coal feeder seal air door; start the mill rotary separator and automatically add to the minimum frequency;

[0110] Sixth step feedback: the mill seal air door is fully open; the coal feeder seal air door is fully open; the mill seal air differential pressure is appropriate; the mill rotary separator is running.

[0111] Notes and skills to be noted: first open the mill outlet door, then open the mill seal air door, so as to establish the mill seal air differential pressure.

[0112] 7) Step seven: close the mill cold and hot primary air pneumatic control valves (009);

[0113] Seventh step instruction: close the mill cold primary air pneumatic control valve and switch to manual; close the mill hot primary air pneumatic control valve and switch to manual;

[0114] Seventh step feedback: the mill cold primary air pneumatic control valve is <3% and in manual position; the mill hot primary air pneumatic control valve is <3% and in manual position;

[0115] Notes and skills to be noted: if the mill cold primary air pneumatic control valve and the mill hot primary air pneumatic control valve are opened too wide, the mill air intake will increase rapidly after the cold and hot primary air shut-off valves are opened, especially the hot air, which will cause the mill outlet temperature to rise rapidly.

[0116] 8) Step eight: open the mill cold primary air pneumatic shut-off valve (010);

[0117] Eighth step instruction: open the mill cold primary air pneumatic shut-off valve;

[0118] Eighth step feedback: the mill cold primary air pneumatic shut-off valve is fully open.

[0119] 9) Step nine: open the mill hot primary air pneumatic shutoff valve (011);

[0120] Step nine instruction: open the mill hot primary air pneumatic shutoff valve;

[0121] Step nine feedback: the mill hot primary air pneumatic shutoff valve is fully open.

[0122] 10) Step ten: warm up the mill to meet the mill start-up required inlet primary air volume and mill outlet temperature (012);

[0123] Step ten instruction: pre-open the mill cold primary air pneumatic damper valve to 80% instruction and put into automatic to maintain the mill outlet temperature; put into the mill cold primary air pneumatic damper valve automatic to maintain the mill inlet primary air volume;

[0124] Step ten feedback: the mill cold primary air pneumatic damper valve is in automatic and the mill outlet temperature is greater than the set temperature; the mill hot primary air pneumatic damper valve is in automatic and the mill inlet air volume is greater than the set air volume; the mill start-up permission condition is met;

[0125] Notes and skills: pre-opening the mill cold primary air pneumatic damper valve to 80% instruction has two aspects: one is to maintain a certain mill inlet primary air volume, and the other is to prevent the mill hot primary air pneumatic damper valve from being closed too tightly, causing the mill outlet temperature to rise rapidly. After the mill cold primary air pneumatic damper valve is opened, put into the mill cold primary air pneumatic damper valve automatic, and the mill outlet temperature set value from the current value to the set value through the rate. Put the mill hot primary air pneumatic damper valve into automatic, and the air volume set value through the rate to the set value. Under the action of automatic adjustment, the cold and hot dampers will not swing greatly, and finally maintain the mill start-up permission mill inlet primary air volume and mill outlet temperature. The bias value of the mill hot primary air pneumatic damper valve should be handled according to the actual situation. If the inlet primary air volume and the coal quantity curve are consistent, the logic can be automatically zeroed. If they are not consistent, they can not be zeroed, and the running personnel can manually adjust the size according to the actual situation. Note that the mill inlet primary air volume small jump mill logic can be appropriately optimized. That is, when the mill is running and the mill inlet primary air volume is small, the mill is jumped.

[0126] 11) Step eleven: start the mill (013);

[0127] Step eleven instruction: issue a start mill instruction;

[0128] Step eleven feedback: the mill is running.

[0129] 12) Step twelve: open the coal feeder outlet door (014);

[0130] Step twelve instruction: open the coal feeder outlet door;

[0131] Twelfth step feedback: The coal feeder outlet door is fully open; the coal feeder start-up condition is met.

[0132] 13) Step thirteen: Start the coal feeder (015);

[0133] Thirteenth step command: Start the coal feeder; set the minimum coal quantity for the coal feeder;

[0134] Thirteenth step feedback: The coal feeder has started.

[0135] 14) Step fourteen: Open the coal feeder inlet door (016);

[0136] Fourteenth step command: Open the coal feeder outlet door;

[0137] Fourteenth step feedback: The coal feeder inlet door is fully open.

[0138] 15) Step fifteen: Lower the mill roller (017);

[0139] Fifteenth step command: When the mill is empty, delay 180 seconds (the time is determined according to the coal laying time) to lower the mill roller; when the mill is not empty, directly lower the mill roller;

[0140] Fifteenth step feedback: The mill roller is lowered into position.

[0141] Notes and skills to be aware of: The time to start lowering the mill roller is determined according to the empty or non-empty state of the mill. Pay attention to the mill flame protection. The mill flame protection must be optimized, and after the mill roller leaves the raised position and the delay time (the delay time is determined according to the actual test time, that is, the minimum time required from the start of lowering the mill roller to the stabilization of the mill flame), the mill flame is judged again.

[0142] 16) Step sixteen: Engage the mill roller load automatic (018);

[0143] Sixteenth step command: Engage the mill roller load and counter load automatic; increase the coal feeder coal quantity command to the minimum coal quantity for the mill;

[0144] Sixteenth step feedback: The mill roller load and counter load automatic has been engaged;

[0145] Notes and skills to be aware of: The mill roller load and counter load automatic is engaged, and the program automatically causes the pressure bias to be zeroed through the speed limit. If the speed limit is not passed, it may cause fluctuations in the loading force.

[0146] 17) Step seventeen: Parallel mill (019);

[0147] Seventeenth step command: When the fuel master is in the automatic position, engage the coal feeder coal quantity automatic, pass the speed limit, and gradually zero the single coal feeder coal quantity bias;

[0148] Seventeenth step feedback: the coal feeder coal quantity is in the automatic position and the coal feeder coal quantity bias is 0;

[0149] Or the fuel master control is in the manual position;

[0150] Notes and skills: maintaining stable main steam pressure is the prerequisite, the speed of the coal feeder coal quantity instruction bias to zero must be greater than the fuel master control adjustment speed, so as to ensure that the coal feeder coal quantity does not decrease to the minimum, thereby affecting the stability of the coal mill flame.

[0151] The intelligent starting method of the pulverizing system under the background of flexible start-stop peak regulation provided by the application realizes the purpose of intelligent starting of the pulverizing system in the starting process of the generator set, and the operation personnel can start flexibly according to the current unit state, grid side dispatching information, daily power generation, daily fuel consumption and the start-stop state of each coal mill under the background of current deep peak regulation, solve the problems of complicated operation, conventional steps and non-precise program setting in the previous automatic starting of the unit program, realize the rapid starting of the unit and timely response to the load demand of the grid side, promote the strategic goal of flexible peak regulation, and meet the efficient, rapid and flexible intelligent starting method of the pulverizing system.

[0152] In order to realize the above-mentioned embodiment, the application further provides an intelligent starting device of a pulverizing system under the background of flexible start-stop peak regulation.

[0153] Figure 3 A structure diagram of an intelligent starting device of a pulverizing system under the background of flexible start-stop peak regulation provided by the embodiment of the application.

[0154] As Figure 3 shown, the intelligent starting device of the pulverizing system under the background of flexible start-stop peak regulation includes a data acquisition module, a first starting module, a coal mill adjusting module, a second starting module and a starting module, wherein,

[0155] The data acquisition module is used to acquire the working position of the oil pump of the lubricating oil station and the hydraulic oil station and the judgment condition of the empty mill and the non-empty mill.

[0156] The first starting module is used to start the oil pump of the lubricating oil station and the hydraulic oil station based on the acquired working position of the oil pump, so as to meet the oil temperature and oil pressure conditions required by the starting of the coal mill.

[0157] The coal mill adjusting module is used to adjust the mill roller, the outlet door of the coal mill, the sealing air door and the sealing air door of the coal feeder, and adjust the cold and hot primary air pneumatic adjusting valve and the shut-off valve of the coal mill, so as to meet the inlet primary air quantity and outlet temperature required by the starting of the coal mill.

[0158] The second starting module is configured to start the coal mill and the coal feeder, and to adjust the outlet door and the inlet door of the coal feeder when starting the coal feeder.

[0159] The starting module is configured to determine the state of the coal mill according to the judging condition of empty mill or non-empty mill, to select the start time of the mill roller based on the state of the coal mill, to lower the mill roller when the start time is reached, and to put into the mill roller loading automation and grinding, thereby completing the start of the pulverizing system.

[0160] Optionally, in an embodiment of the present application, the coal mill is a roller mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station and a rotary separator, and the coal feeder is a weighing type coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

[0161] It should be noted that the foregoing description of the embodiment of the intelligent start-up method of the pulverizing system under the background of flexible start-stop peak regulation is also applicable to the embodiment of the intelligent start-up device of the pulverizing system under the background of flexible start-stop peak regulation, and details are not repeated here.

[0162] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0163] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0164] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions (or steps) in the process, and the various embodiments of the application contemplate that the scope of the application includes additional implementation in which the functions are performed in different orders, in substantially simultaneous fashion, or in reverse order, as appropriate, and that the application includes additional steps as appropriate.

[0165] The logic and / or steps represented in flow diagrams or otherwise described herein, for example, can be considered as a sequence of instructions to implement logic functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device, such as a computer-based system, processor- containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In the context of this specification, a "computer-readable medium" can be any means that can contain, store, communicate, propagate or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a machine-readable storage device (e.g., magnetic, optical or other) a machine-readable storage diskette (e.g., floppy disk, optical disk, CD- ROM, etc.), a machine- readable storage card (e.g., PCMCIA card, etc.), a machine-readable storage tape (e.g., magnetic tape, optical tape, etc.), a machine-readable storage medium (e.g., RAM, ROM, etc.), a machine-readable signal (e.g., electrical, optical, etc.), a machine-readable medium (e.g., carrier wave, etc.) or any other suitable medium or means of embodying the program. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a RAM, a ROM, an EPROM, a FLASH memory card, an optical fiber, and a portable compact disc read-only memory (CD-ROM). Additionally, the computer-readable medium can be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and stored in a computer memory.

[0166] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the above embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. As such, in some embodiments, the steps or methods can be implemented in hardware such as a special purpose computer, a programmed microprocessor or microcontroller, a microprocessor-based or a microcontroller-based application-specific integrated circuit, a digital signal processor, a hard-wired circuit or the like.

[0167] Those of skill in the art would understand that information and signals can be represented using any of a variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0168] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing module, or each of the units can be physically present separately, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0169] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method for intelligent start-up of a milling system in a flexible start-stop peak shaving context, characterized in that, The method comprises the following steps: obtaining the working position of the oil pump of the lubricating oil station and the hydraulic oil station of the coal mill, and judging the emptying and non-emptying of the coal mill; starting the oil pump of the lubricating oil station and the hydraulic oil station based on the obtained working position of the oil pump, so as to meet the oil temperature and oil pressure required for starting the coal mill; adjusting the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder, and adjusting the cold and hot primary air pneumatic regulating valve and the shut-off valve of the coal mill, so as to meet the inlet primary air volume and outlet temperature required for starting the coal mill; starting the coal mill and the coal feeder, and adjusting the outlet door and the inlet door of the coal feeder when starting the coal feeder; determining the state of the coal mill according to the judging condition of the emptying and non-emptying of the coal mill, selecting the starting time of the roller reduction based on the state of the coal mill, reducing the roller when reaching the starting time, and putting into the roller loading automation, grinding, and completing the starting of the coal pulverizing system; wherein the adjusting of the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder comprises: opening the outlet door of the coal mill; opening the sealing air door of the coal mill and the sealing air door of the coal feeder, so that the sealing air differential pressure of the coal mill reaches a preset range; running the rotating separator of the coal mill; the adjusting of the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder further comprises: opening the outlet door of the coal mill first, and then opening the sealing air door of the coal mill, so as to establish the sealing air differential pressure of the coal mill; the adjusting of the cold and hot primary air pneumatic regulating valve and the shut-off valve of the coal mill comprises: closing the cold and hot primary air pneumatic regulating valve of the coal mill and cutting to the manual position; opening the cold primary air pneumatic shut-off valve of the coal mill; opening the hot primary air pneumatic shut-off valve of the coal mill; the warm grinding operation of the coal mill to meet the inlet primary air volume and outlet temperature required for starting the coal mill comprises: pre-opening the cold primary air pneumatic regulating valve of the coal mill by 80% of the instruction, and putting into the automatic mode to maintain the outlet temperature of the coal mill; putting into the automatic mode of the cold primary air pneumatic regulating valve of the coal mill to maintain the inlet primary air volume of the coal mill; the roller reduction comprises: when emptying, delaying the roller reduction, and the delay time is determined according to the coal laying time; when non-emptying, directly reducing the roller; the grinding comprises: maintaining the stable main steam pressure as a prerequisite, and the coal quantity instruction bias of the coal feeder is zeroed at a speed greater than the fuel main control adjusting speed.

2. The method of claim 1, wherein, The coal mill is a roller type coal mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station, and a rotating separator, the coal feeder is a weighing type coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

3. The method of claim 1, wherein, The starting of the oil pump of the lubricating oil station and the hydraulic oil station based on the obtained working position of the oil pump comprises: starting the oil pump of the obtained working position of the lubricating oil station; putting into the lubricating oil station electric heater interlock; putting into the hydraulic oil station electric heater interlock; starting the high-speed oil pump of the lubricating oil station and putting into the interlock, and stopping the running of the working position oil pump of the lubricating oil station; starting the oil pump of the obtained working position of the lubricating oil station and putting into the interlock.

4. The method of claim 1, wherein, The warm grinding operation of the coal mill to meet the inlet primary air volume and outlet temperature required for starting the coal mill comprises: pre-opening the cold primary air pneumatic regulating valve of the coal mill, and putting into the automatic mode to maintain the outlet temperature of the coal mill; The cold primary air pneumatic regulating valve of the coal mill is automatically put into, and the primary air quantity of the coal mill inlet is maintained.

5. The method of claim 1, wherein, The starting of the coal mill and the coal feeder, and the adjustment of the outlet door and the inlet door of the coal feeder when the coal feeder is started, comprise: Starting the coal mill; Opening the coal feeder outlet door; Starting the coal feeder; Opening the coal feeder inlet door.

6. The method of claim 1, wherein, The coal mill roller loading automatic comprises: The coal mill roller loading and reverse loading automatic; The coal quantity of the coal feeder is increased to the minimum coal quantity of the coal mill; The parallel grinding comprises: When the fuel master control is in the automatic position, the coal quantity of the coal feeder is automatically put into, and the single coal feeder coal quantity offset is biased to zero by limiting the rate.

7. A pulverizing system intelligent starting device for a flexible start-stop peak shaving background, characterized in that, The data acquisition module, the first starting module, the coal mill adjusting module, the second starting module, and the starting module are included, wherein, The data acquisition module is configured to acquire the oil pump working position of the lubricating oil station and the hydraulic oil station of the coal mill and the judgment condition of empty grinding and non-empty grinding; The first starting module is configured to start the oil pump of the lubricating oil station and the hydraulic oil station based on the acquired oil pump working position, so as to meet the oil temperature and oil pressure conditions required by the starting of the coal mill; The coal mill adjusting module is configured to raise the roller, adjust the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder, and adjust the cold and hot primary air pneumatic regulating valve and the shutdown valve of the coal mill, so as to meet the inlet primary air quantity and outlet temperature required by the starting of the coal mill; The second starting module is configured to start the coal mill and the coal feeder, and adjust the outlet door and the inlet door of the coal feeder when the coal feeder is started; The starting module is configured to determine the state of the coal mill according to the judgment condition of empty grinding and non-empty grinding, select the start time of lowering the roller based on the state of the coal mill, lower the roller when the start time is reached, put into the roller loading automatic, and perform parallel grinding, so as to complete the starting of the coal making system; The adjustment of the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder comprises: Opening the outlet door of the coal mill; Opening the sealing air door of the coal mill and the sealing air door of the coal feeder, so that the sealing air differential pressure of the coal mill reaches a preset range; Running the rotating separator of the coal mill; The adjustment of the outlet door, the sealing air door of the coal mill, and the sealing air door of the coal feeder further comprises: First opening the outlet door of the coal mill, and then opening the sealing air door of the coal mill, so as to establish the sealing air differential pressure of the coal mill; The adjustment of the cold and hot primary air pneumatic regulating valve and the shutdown valve of the coal mill comprises: Closing the cold and hot primary air pneumatic regulating valve of the coal mill and cutting to the manual position; Opening the cold primary air pneumatic shutdown valve of the coal mill; Opening the hot primary air pneumatic shutdown valve of the coal mill; The warm grinding operation of the coal mill to meet the inlet primary air quantity and outlet temperature required by the starting of the coal mill comprises: Pre-opening the cold primary air pneumatic regulating valve of the coal mill by 80% of the instruction, and putting into automatic to maintain the outlet temperature of the coal mill; putting into the cold primary air pneumatic regulating valve automatic of the coal mill to maintain the primary air quantity of the coal mill inlet; The lowering of the roller comprises: When the coal mill is empty, the roller is lowered with a time delay, and the time delay time is determined according to the coal laying time; When the coal mill is not empty, the roller is directly lowered; The parallel grinding comprises: Maintain the main steam pressure stable as the prerequisite, coal feeder coal quantity instruction bias offset zero speed greater than the main control of fuel regulation speed.

8. The apparatus of claim 7, wherein, The coal mill is a roller type coal mill, the coal mill is provided with a lubricating oil station, a hydraulic oil station and a rotary separator, the coal feeder is a weighing type coal feeder, and the coal quantity of the coal feeder is automatically adjusted.

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