Method and device for controlling opening degree of cooling air door of dry slag extractor

Abstract

The embodiment of the invention provides a dry slag extractor cooling air door opening degree control method and device. The method comprises the steps that opening degree response curves, corresponding to boiler loads and cooling air doors, of the boiler loads are obtained; a large slag signal is obtained through the large slag detection system, the real-time slag discharge amount is obtained through the slag amount online monitoring system, and the front slag temperature is obtained through the slag temperature front monitoring system; initial setting is conducted on the opening degree of each cooling air door according to each opening degree response curve; and according to the large slag signal, the real-time slag discharge amount and the front slag temperature, air door opening offset optimization is carried out on the opening of each cooling air door. Through the control method, intelligent operation of cooling air doors of all parts of the dry slag extractor can be achieved, the cooling air volume of the dry slag extractor is greatly reduced, and the smoke exhaust temperature of the boiler is reduced.

Description

Technical Field

[0001] The disclosed embodiments belong to the technical field of energy conservation and consumption reduction in coal-fired power plants, and specifically relate to a method and device for controlling the opening of a cooling air door of a dry slag discharger. Background Art

[0002] In recent years, the dry slag discharger system of coal-fired power station boilers has been rapidly applied due to its advantages of energy saving and water saving. In addition, the comprehensive utilization value of dry slag is higher, and the sales price as a by-product of power generation is 3 to 5 times that of wet slag. When the boiler is operating normally, the high-temperature slag falling from the cold ash hopper is transported through the slag discharge device at the bottom of the furnace, and the cooling air enters the slag discharger through the small air ports on both sides of the dry slag discharger shell and the head air supply port. The high-temperature slag is gradually cooled on the conveyor belt, and the slag gradually decreases to about 150°C. The cooling air gradually heats up to 300°C to 400°C and enters the furnace (equivalent to the temperature of the boiler hot secondary air entering the furnace), thereby recovering the physical sensible heat of the slag and the heat released by its re-combustion. The structure of this system is as follows: Figure 1 shown.

[0003] But in fact, a large number of dry slag discharge systems have encountered many problems in application:

[0004] 1) Usually, the designed cooling air volume of the dry slag discharger accounts for about 1% of the total air volume of the boiler, but the actual cooling air volume often reaches more than 2% to 3%, and even exceeds 5% during defect treatment. The excessive low-temperature cooling air will cause air leakage at the bottom of the furnace, which will directly cause the exhaust gas temperature to rise, increase the heat loss of the exhaust gas, reduce the thermal efficiency of the boiler, and affect the combustion in the furnace, so that the dry slag discharger is not energy-saving but is in a state of energy consumption for a long time.

[0005] 2) Lack of key parameter monitoring: At present, the key operating parameters of the dry slag machine, such as the air leakage rate of the dry slag machine and the quantitative parameters of the dry slag machine's impact on the unit economy, are still monitored manually by cameras. Problems such as the lack of online monitoring of key parameters are prominent, and it is impossible to provide guidance for the operation adjustment of the dry slag machine. The current operation of the dry slag machine is extensive and inefficient, and there is little research on the online optimization and adjustment of the dry slag machine operation.

[0006] 3) The cooling air door is roughly adjusted, and the head electric cooling door is ineffectively adjusted. The cooling air door on the dry slag machine side is roughly adjusted, and the air door opening is fixed at a certain opening for a long time, which loses the meaning of adjusting the working conditions; the dry slag discharger only monitors the slag temperature at the head slag crusher position. When large slag suddenly falls from the bottom of the furnace or the amount of bottom slag increases suddenly during the soot blowing process, the adjustment action of the head cooling air door lags behind significantly, causing the slag discharge temperature to rise sharply, increasing the frequency of overheating of the dry slag discharger, and bringing risks to the safe and normal operation of the dry slag discharger. At the same time, the adjustment of the cooling air door of the dry slag machine is obviously delayed, which not only fails to effectively cool the high-temperature slag, but also increases the air leakage of the dry slag machine, making the dry slag machine not only energy-saving, but also energy-consuming, and the energy-saving effect of the dry slag discharger cannot be exerted.

[0007] At present, researchers have developed a system for collecting air leakage from a slag dryer: a suction system is added to the bottom of the slag dryer to collect the air leakage from the bottom of the furnace through negative pressure suction and then send it to other areas. The system has a high investment cost and does not essentially reduce the air leakage from the bottom of the furnace. The suction fan needs to consume more energy during daily operation, and the negative pressure suction system has an adverse effect on the stable combustion of the boiler at low load.

[0008] In view of the above problems, it is necessary to propose a method and device for controlling the opening degree of the cooling air door of a dry slag discharger that is reasonably designed and effectively solves the above problems. Summary of the invention

[0009] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a method and device for controlling the opening of a cooling air door of a dry slag discharger.

[0010] One aspect of the embodiment of the present disclosure provides a method for controlling the opening of a cooling air door of a dry slag discharger, wherein the dry slag discharger comprises a horizontal section, a climbing section and a head section connected in sequence; a plurality of slag wells are connected to the top of the horizontal section at intervals, a plurality of first cooling air doors are arranged at intervals at the bottom of the horizontal section, and a large slag monitoring system is arranged below each of the slag wells;

[0011] A second cooling air door is provided at the bottom of the climbing section, a slag amount online monitoring system is provided at the top of the climbing section, and a slag temperature pre-monitoring system is provided at the junction of the climbing section and the horizontal section;

[0012] The head section is provided with a third cooling air door; wherein the control method comprises:

[0013] Obtain respectively the boiler load and the opening response curves corresponding to each cooling air door;

[0014] Acquire a large slag signal through the large slag detection system, acquire a real-time slag discharge amount through the slag amount online monitoring system, and acquire a pre-slag temperature through the slag temperature pre-monitoring system;

[0015] The opening of each cooling air door is initially set according to each opening response curve; and the opening of each cooling air door is optimized by air door opening bias according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

[0016] Optionally, the optimizing the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature includes:

[0017] According to the large slag signal and the real-time slag discharge amount, the opening of the first cooling air door is optimized by air door opening bias, specifically including:

[0018] When the large slag signal appears, the opening of the first cooling air door is automatically opened and maintained for a preset time; or,

[0019] According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the first cooling air door is automatically opened or closed.

[0020] Optionally, the optimizing the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature further includes:

[0021] According to the large slag signal, the real-time slag discharge amount and the pre-slag temperature, the opening of the second cooling air door is optimized by air door opening bias, specifically including:

[0022] When the large slag signal appears, the opening of the second cooling air door is automatically opened and maintained for a preset time; or,

[0023] When the front slag temperature rises rapidly, the second cooling air opening is automatically increased; or,

[0024] According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the second cooling air door is automatically opened or closed.

[0025] Optionally, the optimizing the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature further includes:

[0026] Optimizing the opening bias of the third cooling air door according to the large slag signal and the real-time slag discharge amount, specifically comprising:

[0027] When the large slag signal appears, the opening of the third cooling air door is automatically opened and maintained for a preset time; or,

[0028] According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the third cooling air door is automatically opened or closed.

[0029] Optionally, the head section of the dry slag discharger is provided with a slag temperature monitoring system, and the real-time slag discharge temperature is obtained through the slag temperature detection system;

[0030] The optimizing the opening bias of the third cooling air door according to the large slag signal and the real-time slag discharge amount specifically includes:

[0031] According to the real-time slag discharge temperature, the mean slag discharge temperature of the budgeted time is calculated, and the rate of change of the mean slag discharge temperature in the current cycle compared with the previous cycle is calculated based on the mean slag discharge temperature. When the rate of change of the mean slag discharge temperature exceeds the preset threshold each time, the third cooling air door is automatically opened larger or smaller.

[0032] Optionally, before optimizing the opening bias of the third cooling air door, the method further includes:

[0033] The opening of the third cooling air door is initially set and optimized according to the real-time slag discharge temperature.

[0034] Optionally, the initial setting optimization of the opening of the third cooling air door according to the real-time slag discharge temperature includes:

[0035] If the real-time slag discharge temperature is higher than the slag discharge temperature reference value, the opening of the third cooling air door is automatically increased;

[0036] If the real-time slag discharge temperature is lower than the slag discharge temperature reference value, the opening of the third cooling air door is automatically reduced.

[0037] Another aspect of the embodiment of the present disclosure provides a dry slag discharger cooling air door opening control device, the dry slag discharger comprises a horizontal section, a climbing section and a head section connected in sequence; a plurality of slag pits are connected to the top of the horizontal section at intervals, a plurality of first cooling air doors are arranged at intervals at the bottom of the horizontal section, and a large slag monitoring system is arranged below each slag pit;

[0038] A second cooling air door is provided at the bottom of the climbing section, a slag amount online monitoring system is provided at the top of the climbing section, and a slag temperature pre-monitoring system is provided at the junction of the climbing section and the horizontal section;

[0039] The head section is provided with a third cooling air door; wherein the device comprises:

[0040] An acquisition system is used to respectively acquire boiler load and opening response curves corresponding to each cooling air door;

[0041] The large slag detection system is used to obtain large slag signals, the slag amount online monitoring system is used to obtain real-time slag discharge amount, and the slag temperature pre-monitoring system is used to obtain pre-slag temperature;

[0042] A control system, used for initially setting the opening of each cooling air door according to each opening response curve; and

[0043] It is used to optimize the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

[0044] Another aspect of the present disclosure provides an electronic device, including:

[0045] one or more processors;

[0046] A storage unit is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors can implement the method described in any of the above items.

[0047] Another aspect of an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program can implement any of the methods described above when executed by a processor.

[0048] The dry slag discharger cooling damper opening control method of the disclosed embodiment is based on the online monitoring of the key parameters of the dry slag discharger, can realize the intelligent closed-loop control of all the cooling dampers of the dry slag discharger, can improve the intelligent operation level of the unit, can be used as an important part of building a smart power station, and greatly improves the reliability of the unit equipment.

[0049] The method for controlling the opening degree of the cooling air door of the dry slag discharger of the disclosed embodiment combines the large slag monitoring system, the slag quantity online monitoring system and the slag temperature pre-monitoring system to realize regional and differentiated intelligent control of the cooling air door of the head section, the cooling air door of the climbing section and the cooling air door of the bottom horizontal section. For the areas with better cooling effect of the cooling air door of the bottom horizontal section and the cooling air door of the climbing section, the timeliness and purposefulness of their adjustment are enhanced, thereby greatly improving the cooling efficiency of the dry slag discharger and controlling the over-temperature frequency of the dry slag discharger.

[0050] The cooling damper opening control method of the dry slag discharger in the disclosed embodiment is that the cooling damper of the dry slag discharger can realize real-time online adjustment at full load and all time periods, and the cooling air volume of the dry slag discharger can be adjusted as needed, so that the cooling air volume of the dry slag discharger can be accurately controlled, the cooling air volume of the dry slag discharger can be greatly reduced, the exhaust temperature of the boiler can be reduced, and the thermal efficiency of the boiler can be improved; at the same time, the reduction of the air leakage at the bottom of the boiler at low load is beneficial to improving the low-load stable combustion capability of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of a dry slag discharger in the prior art;

[0052] Figure 2 This is a structural schematic diagram of a dry slag discharger according to one embodiment of the present disclosure;

[0053] Figure 3 It is a flow chart of a method for controlling the opening degree of a cooling air door of a dry slag discharger according to one embodiment of the present disclosure;

[0054] Figure 4 The present invention is a schematic diagram of the structure of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] like Figure 2 As shown, an embodiment of the present disclosure provides a dry slag discharger, which includes a horizontal section 2, a climbing section 3 and a head section 4 connected in sequence; a plurality of slag pits 1 are connected at intervals on the top of the horizontal section 2, a plurality of first cooling air doors 8 are arranged at intervals on the bottom of the horizontal section 2, and a large slag monitoring system 5 is arranged under each of the slag pits 1.

[0057] A second cooling air door 9 is provided at the bottom of the climbing section 3 , a slag amount online monitoring system 7 is provided at the top of the climbing section 3 , and a slag temperature pre-monitoring system 6 is provided at the junction of the climbing section 3 and the horizontal section 2 .

[0058] The head section 4 is provided with a third cooling air door 10 .

[0059] like Figure 3 As shown, another aspect of the embodiment of the present disclosure provides a method S100 for controlling the opening of a cooling air door of a dry slag discharger, the control method S100 comprising:

[0060] S110, respectively obtaining boiler load and opening response curves corresponding to each cooling air door.

[0061] Specifically, taking the boiler load (coal burning amount) as the control signal, the opening response curves of the first cooling air door, the second cooling air door and the third cooling air door under different boiler loads are given.

[0062] S120, obtaining a large slag signal through the large slag detection system, obtaining a real-time slag discharge amount through the slag amount online monitoring system, and obtaining a pre-slag temperature through the slag temperature pre-monitoring system.

[0063] Specifically, Figure 1 As shown, a large slag signal can be obtained through a large slag detection system 5, wherein the large slag detection system 5 can adopt a slag falling imaging detection system. The real-time slag discharge amount is obtained through a slag amount online monitoring system 7, wherein the slag amount online monitoring system 7 can adopt a binocular vision slag amount real-time measurement system. The pre-slag temperature is obtained through a slag temperature pre-monitoring system 6, wherein a temperature sensor can be used in the slag temperature pre-monitoring system 6 to measure the pre-slag temperature.

[0064] S130, initially setting the opening of each cooling air door according to each opening response curve; and optimizing the air door opening bias of each cooling air door according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

[0065] In the first embodiment, the control process of the opening of the first cooling air door of the horizontal section of the dry slag discharger can be as follows:

[0066] First, the opening degree of the first cooling air door is initially set.

[0067] Specifically, as shown in Table 1, with the boiler load (coal burning amount) as the control signal, the opening response curve of the first cooling damper of the bottom horizontal section under different boiler loads is given as the initial setting of the first cooling damper of the bottom horizontal section, giving full play to the adjustment ability of the first cooling damper of the bottom horizontal section under different loads, ensuring that the cooling air volume is near the optimal air volume under normal operation, avoiding pulsating adjustment, and reducing overshoot and undershoot. Among them, the opening curve of the first cooling damper of the horizontal section with load changes needs to be determined according to on-site debugging.

[0068] Table 1 Corresponding relationship between different boiler loads (coal consumption) and the opening of the first cooling air door

[0069]

[0070]

[0071] Secondly, according to the large slag signal and the real-time slag discharge amount, the opening of the first cooling air door is optimized by adjusting the air door opening bias.

[0072] The optimization of the opening bias of the first cooling air door is mainly divided into two aspects:

[0073] 1) When the large slag signal appears, the opening of the first cooling air door is automatically opened and maintained for a preset time.

[0074] Each slag pit 1 is provided with a large slag monitoring system 5. When the large slag monitoring system 5 identifies large slag, the program-controlled air door of the horizontal section of the corresponding area will automatically open, and the cooling air will be replenished in time to quickly cool the large slag and reduce the risk of overheating of the slag discharge.

[0075] When the large slag signal appears at the bottom of the furnace, it indicates that large slag has appeared in the slag dryer at the bottom of the furnace. At this time, the amount of boiler slag increases sharply and the slag dryer is prone to overheating. At this time, the first cooling air door of the horizontal section at the bottom of the slag dryer is automatically opened to replenish the cooling air volume required for the large slag in time, thereby playing a role in timely cooling the large slag. It can maximize the cooling efficiency of the slag dryer, reduce the risk of overheating of the slag dryer, and improve the safety of the unit.

[0076] It should be noted that when the large slag signal comes, the specific offset value of the first cooling air door in the horizontal section needs to be determined based on on-site debugging.

[0077] 2) Based on the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the change rate of the slag discharge amount in the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the first cooling air door is automatically opened or closed.

[0078] It should be noted that whether the first cooling air door is opened or closed is set according to the positive or negative value of the slag discharge amount change rate.

[0079] In the second embodiment, the control process of the second cooling air door opening of the dry slag discharger climbing section can be as follows:

[0080] First, the opening degree of the second cooling air door is initially set.

[0081] Specifically, the boiler load (coal consumption) is used as the control signal, and the opening response curve of the second cooling air door in the climbing section under different boiler loads is given (refer to Example 1) as the initial setting of the second cooling air door in the climbing section. Among them, the opening change curve of the second cooling air door in the climbing section with load needs to be determined according to on-site debugging.

[0082] Secondly, according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature, the opening of the second cooling air door is optimized by the air door opening bias.

[0083] Among them, the opening of the second cooling air door is optimized for the air door opening bias, which mainly includes the following three aspects:

[0084] 1) When the large slag signal appears, the opening of the second cooling air door is automatically opened and maintained for a preset time.

[0085] Specifically, when the signal of large slag at the bottom of the furnace appears, the second cooling air door of the climbing section is adjusted in advance to replenish the cooling air volume required for the large slag in time, so as to play a role in timely cooling the large slag. Compared with the first cooling air door of the horizontal section, the cooling effect of the second cooling air door of the climbing section is relatively weak. At this time, the offset value of the second cooling air door of the climbing section can be appropriately small, which takes into account the cooling effect while controlling the cooling air volume as much as possible. The specific setting value needs to be determined by on-site debugging.

[0086] 2) When the front slag temperature rises rapidly, the second cooling air opening is automatically increased.

[0087] Specifically, the programmable damper of the second cooling air in the climbing section is adjusted according to the slag temperature pre-monitoring data. The slag temperature pre-monitoring data is used to guide the flexible adjustment of the second cooling damper of the climbing section. The second cooling damper of the climbing section will be automatically and flexibly adjusted to play a role in efficiently and timely cooling the high-temperature slag.

[0088] Normally, the dry slag machine is equipped with an online slag temperature measuring point at the top of the slag bin to monitor the boiler slag temperature. However, the slag temperature measuring point here is at the very end of the dry slag machine, which cannot reflect the most realistic slag temperature condition of the dry slag machine. The effect of guiding the adjustment of the cooling damper of the dry slag machine is very limited, resulting in that after the cooling damper is adjusted, it not only does not save energy but is in an energy-consuming state. This technical solution sets a slag temperature pre-monitoring system 6 at the junction of the climbing section and the horizontal section to monitor the slag temperature of the dry slag machine in advance and guide the online optimization adjustment of the second cooling damper of the climbing section. When the leading slag temperature rises rapidly, the second cooling damper of the climbing section is automatically opened to quickly supplement the cooling air volume of the climbing section, timely cool the high-temperature slag of the climbing section, and improve the cooling effect of the dry slag machine. The cooling air volume of the dry slag machine is adjusted as needed, which greatly reduces the cooling air volume of the dry slag machine.

[0089] It should be noted that the slag temperature pre-monitoring damper opening bias value needs to be determined based on on-site debugging.

[0090] 3) Based on the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the second cooling air door is automatically opened or closed.

[0091] It should be noted that whether the second cooling air door is opened or closed is set according to the positive or negative value of the slag discharge amount change rate.

[0092] In the third embodiment, the control process of the opening of the third cooling air door of the head section of the dry slag discharger can be as follows:

[0093] The head section of the dry slag discharger is provided with a slag temperature monitoring system, and the real-time slag discharge temperature is obtained through the slag temperature detection system.

[0094] First, the opening degree of the third cooling air door is initially set.

[0095] Specifically, the boiler load (coal burning amount) is used as the control signal, and the opening response curve of the third cooling air door of the head section under different boiler loads is given (refer to Example 1), which is used as the primary control loop of the third cooling air door to give full play to the adjustment ability of the third cooling air door of the head section under different loads. At the same time, under normal operating conditions, the cooling air volume can be kept near the optimal air volume to avoid pulsating adjustment and reduce overshoot and undershoot.

[0096] Secondly, the opening of the third cooling air door is initially set and optimized according to the real-time slag discharge temperature.

[0097] Specifically, if the real-time slag discharge temperature is higher than the slag discharge temperature reference value, the opening of the third cooling air door is automatically increased;

[0098] If the real-time slag discharge temperature is lower than the slag discharge temperature reference value, the opening of the third cooling air door is automatically reduced.

[0099] Among them, in this embodiment, the real-time slag discharge temperature is the actual slag entering the warehouse temperature, and the slag discharge temperature reference value can be the optimal slag entering the warehouse temperature reference value.

[0100] Thirdly, the opening of the third cooling air door is optimized by adjusting the air door opening bias according to the large slag signal and the real-time slag discharge amount.

[0101] Specifically, a feedforward optimization bias module is added to further optimize the third cooling air door opening control method. The third cooling air door opening bias optimization mainly includes three aspects:

[0102] 1) When the large slag signal appears, the opening of the third cooling air door is automatically opened and maintained for a preset time.

[0103] Specifically, based on the furnace bottom slag monitoring system 5, intelligent recognition of furnace bottom slag is achieved. When the slag monitoring system 5 detects a slag signal, the third cooling air door of the head section is automatically opened and maintained for a period of time.

[0104] It should be noted that the opening offset size and maintenance time of the third cooling air door according to the large slag signal need to be determined based on the on-site debugging results.

[0105] 2) Based on the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold value, the opening of the third cooling air door is automatically opened or closed.

[0106] It should be noted that binocular vision technology is used to achieve real-time online monitoring of the slag discharge volume of the dry slag machine. The specific value of the slag discharge volume change rate and the offset value of the third cooling air door opening change need to be determined through on-site debugging.

[0107] 3) Based on the real-time slag discharge temperature, the mean slag discharge temperature of the budgeted time is calculated, and the rate of change of the mean slag discharge temperature in the current cycle compared with the previous cycle is calculated based on the mean slag discharge temperature. When the rate of change of the mean slag discharge temperature exceeds a preset threshold, the third cooling air door is automatically opened larger or smaller.

[0108] It should be noted that the mean change rate of the slag discharge temperature and the offset value of the third cooling air door opening change need to be determined through on-site debugging.

[0109] The dry slag discharger cooling damper opening control method of the disclosed embodiment is based on the online monitoring of the key parameters of the dry slag discharger, can realize the intelligent closed-loop control of all the cooling dampers of the dry slag discharger, can improve the intelligent operation level of the unit, can be used as an important part of building a smart power station, and greatly improves the reliability of the unit equipment.

[0110] The method for controlling the opening degree of the cooling air door of the dry slag discharger of the disclosed embodiment combines the large slag monitoring system, the slag quantity online monitoring system and the slag temperature pre-monitoring system to realize regional and differentiated intelligent control of the cooling air door of the head section, the cooling air door of the climbing section and the cooling air door of the bottom horizontal section. For the areas with better cooling effect of the cooling air door of the bottom horizontal section and the cooling air door of the climbing section, the timeliness and purposefulness of their adjustment are enhanced, thereby greatly improving the cooling efficiency of the dry slag discharger and controlling the over-temperature frequency of the dry slag discharger.

[0111] The cooling damper opening control method of the dry slag discharger in the disclosed embodiment is that the cooling damper of the dry slag discharger can realize real-time online adjustment at full load and all time periods, and the cooling air volume of the dry slag discharger can be adjusted as needed, so that the cooling air volume of the dry slag discharger can be accurately controlled, the cooling air volume of the dry slag discharger can be greatly reduced, the exhaust temperature of the boiler can be reduced, and the thermal efficiency of the boiler can be improved; at the same time, the reduction of the air leakage at the bottom of the boiler at low load is beneficial to improving the low-load stable combustion capability of the boiler.

[0112] Another aspect of the disclosed embodiment provides a cooling air door opening control device for a dry slag discharger, wherein the dry slag discharger comprises a horizontal section 2, a climbing section 3 and a head section 4 which are connected in sequence; a plurality of slag pits 1 are connected at intervals at the top of the horizontal section 2, a plurality of first cooling air doors 8 are arranged at intervals at the bottom of the horizontal section 2, and a large slag monitoring system 5 is arranged under each of the slag pits 1.

[0113] A second cooling air door 9 is provided at the bottom of the climbing section 3 , a slag amount online monitoring system 7 is provided at the top of the climbing section 3 , and a slag temperature pre-monitoring system 6 is provided at the junction of the climbing section 3 and the horizontal section 2 .

[0114] The head section 4 is provided with a third cooling air door 10 .

[0115] Wherein, the device comprises:

[0116] The acquisition system is used to respectively acquire the boiler load and the opening response curve corresponding to each cooling air door.

[0117] The large slag detection system 5 is used to obtain large slag signals, the slag amount online monitoring system 7 is used to obtain real-time slag discharge amount, and the slag temperature pre-monitoring system 6 is used to obtain pre-slag temperature.

[0118] A control system, used for initially setting the opening of each cooling air door according to each opening response curve; and

[0119] It is used to optimize the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

[0120] like Figure 4 As shown, another aspect of the embodiment of the present disclosure provides an electronic device 200 including one or more processors 210, one or more storage devices 220, one or more input devices 230, one or more output devices 240, etc. These components are interconnected through a bus system 250 and / or other forms of connection mechanisms. It should be noted that Figure 4 The components and structures of the electronic device shown are merely exemplary and non-limiting. The electronic device may also have other components and structures as required.

[0121] The processor 210 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 200 to perform desired functions.

[0122] The storage device 220 may include one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor may run the program instructions to implement the above-mentioned dry slag discharge machine cooling air door opening control method. The client function (implemented by the processor) and / or other desired functions in the embodiment of the present disclosure. Various applications and various data may also be stored in the computer-readable storage medium, for example, various data used and / or generated by the application, etc.

[0123] The input device 230 may be a device used by a user to input instructions, and may include one or more of a keyboard, a mouse, a microphone, a touch button, a touch screen, and the like.

[0124] The output device 240 may output various information (eg, images or sounds) to the outside (eg, a user), and may include one or more of a display, a speaker, and the like.

[0125] Another aspect of the present disclosure provides an electronic device, including:

[0126] one or more processors;

[0127] A storage unit is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors can implement the method described above.

[0128] Another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program can implement the method described above when executed by a processor.

[0129] The computer-readable medium may be included in the apparatus, device, or system of the present invention, or may exist independently.

[0130] Among them, computer-readable storage media can be any tangible media that contains or stores a program, which can be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment. More specific examples include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, an optical fiber, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0131] The computer-readable storage medium may also include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code, specific examples of which include but are not limited to electromagnetic signals, optical signals, or any suitable combination thereof.

[0132] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the embodiments of the present disclosure, but the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of the present disclosure.

Claims

1. A method for controlling the opening of a cooling air door of a dry slag discharger, characterized in that: The dry slag discharger comprises a horizontal section, a climbing section and a head section connected in sequence; a plurality of slag pits are connected to the top of the horizontal section at intervals, a plurality of first cooling air doors are arranged at intervals at the bottom of the horizontal section, and a large slag monitoring system is arranged under each slag pit; A second cooling air door is provided at the bottom of the climbing section, a slag amount online monitoring system is provided at the top of the climbing section, and a slag temperature pre-monitoring system is provided at the junction of the climbing section and the horizontal section; The head section is provided with a third cooling air door; wherein the control method comprises: Obtain respectively the boiler load and the opening response curves corresponding to each cooling air door; Acquire a large slag signal through the large slag detection system, acquire a real-time slag discharge amount through the slag amount online monitoring system, and acquire a pre-slag temperature through the slag temperature pre-monitoring system; The opening of each cooling air door is initially set according to each opening response curve; and the opening of each cooling air door is optimized by air door opening bias according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

2. The method according to claim 1, characterized in that The optimizing the opening bias of each cooling air door according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature includes: According to the large slag signal and the real-time slag discharge amount, the opening of the first cooling air door is optimized by air door opening bias, specifically including: When the large slag signal appears, the opening of the first cooling air door is automatically opened and maintained for a preset time; or, According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the first cooling air door is automatically opened or closed.

3. The method according to claim 1, characterized in that The method of optimizing the opening of each cooling air door according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature also includes: According to the large slag signal, the real-time slag discharge amount and the pre-slag temperature, the opening of the second cooling air door is optimized by air door opening bias, specifically including: When the large slag signal appears, the opening of the second cooling air door is automatically opened and maintained for a preset time; or, When the front slag temperature rises rapidly, the second cooling air opening is automatically increased; or, According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the second cooling air door is automatically opened or closed.

4. The method according to claim 1, characterized in that: The method of optimizing the opening of each cooling air door according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature also includes: Optimizing the opening bias of the third cooling air door according to the large slag signal and the real-time slag discharge amount, specifically comprising: When the large slag signal appears, the opening of the third cooling air door is automatically opened and maintained for a preset time; or, According to the real-time slag discharge amount obtained, the average slag discharge amount in the preset time is calculated, and the slag discharge amount change rate of the current cycle compared with the previous cycle is calculated based on the average slag discharge amount. When the slag discharge amount change rate exceeds the preset threshold each time, the opening of the third cooling air door is automatically opened or closed.

5. The method according to claim 4, characterized in that The head section of the dry slag discharger is provided with a slag temperature monitoring system, through which the real-time slag discharge temperature is obtained; The optimizing the opening bias of the third cooling air door according to the large slag signal and the real-time slag discharge amount specifically includes: According to the real-time slag discharge temperature, the mean slag discharge temperature of the budgeted time is calculated, and the rate of change of the mean slag discharge temperature in the current cycle compared with the previous cycle is calculated based on the mean slag discharge temperature. When the rate of change of the mean slag discharge temperature exceeds the preset threshold each time, the third cooling air door is automatically opened larger or smaller.

6. The method according to claim 5, characterized in that Before optimizing the opening of the third cooling air door by adjusting the air door opening bias, the method further includes: The opening of the third cooling air door is initially set and optimized according to the real-time slag discharge temperature.

7. The method according to claim 6, characterized in that The initial setting and optimization of the opening of the third cooling air door according to the real-time slag discharge temperature includes: If the real-time slag discharge temperature is higher than the slag discharge temperature reference value, the opening of the third cooling air door is automatically increased; If the real-time slag discharge temperature is lower than the slag discharge temperature reference value, the opening of the third cooling air door is automatically reduced.

8. A device for controlling the opening degree of a cooling air door of a dry slag discharger, characterized in that: The dry slag discharger comprises a horizontal section, a climbing section and a head section connected in sequence; a plurality of slag pits are connected to the top of the horizontal section at intervals, a plurality of first cooling air doors are arranged at intervals at the bottom of the horizontal section, and a large slag monitoring system is arranged under each slag pit; A second cooling air door is provided at the bottom of the climbing section, a slag amount online monitoring system is provided at the top of the climbing section, and a slag temperature pre-monitoring system is provided at the junction of the climbing section and the horizontal section; The head section is provided with a third cooling air door; wherein the device comprises: An acquisition system is used to respectively acquire boiler load and opening response curves corresponding to each cooling air door; The large slag detection system is used to obtain large slag signals, the slag amount online monitoring system is used to obtain real-time slag discharge amount, and the slag temperature pre-monitoring system is used to obtain pre-slag temperature; A control system, used for initially setting the opening of each cooling air door according to each opening response curve; and It is used to optimize the damper opening bias of each cooling damper according to the large slag signal, the real-time slag discharge amount and the pre-slag temperature.

9. An electronic device, characterized in that: include: one or more processors; A storage unit, used to store one or more programs, which, when executed by the one or more processors, enable the one or more processors to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 can be implemented.

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