An explosion-proof control logic method, system and electronic equipment for a coal bunker
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAN THERMAL POWER RES INST CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]但在实际运行中，因机组运行过程中工况多变、煤质不稳、煤中杂物干扰等原因，导致难以精准界定灭火系统介入的时机，导致保护不及时或过度保护，这样既威胁生产安全又可能造成浪费
[0015]本公开实施例的有益效果包括：
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Figure CN122516554A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of explosion-proof control, and in particular to an explosion-proof control logic method, system and electronic equipment for a pulverized coal silo. Background Technology
[0002] With the continuous development of thermal power generation technology, further requirements have been placed on the clean carbon reduction, safety and reliability, efficient regulation, and intelligent operation capabilities of coal-fired power generating units. However, existing large-scale units generally adopt direct-fired pulverizing systems, which result in insufficient output from the coal mills and difficulties in stable combustion under low-load conditions. Therefore, large-scale units often add pulverized coal storage silos to supplement the boiler with pulverized coal, which can effectively reduce the minimum output and improve the response rate. However, to meet the above requirements, pulverized coal storage silos usually store lignite or high-volatile bituminous coal with high deflagration risk, thus requiring the installation of monitoring and fire extinguishing systems.
[0003] However, in actual operation, due to the variable operating conditions, unstable coal quality, and interference from impurities in the coal, it is difficult to accurately determine the timing of the fire extinguishing system's intervention, leading to untimely or excessive protection. This threatens production safety and may result in waste. Therefore, a graded control method for explosion-proofing pulverized coal silos is urgently needed. Summary of the Invention
[0004] This disclosure provides an explosion-proof control logic method, system, and electronic device for a pulverized coal silo, which provides a method to control the timing of the activation of the fire extinguishing system, thereby improving the accuracy and efficiency of explosion-proof control.
[0005] In view of the above problems, firstly, this disclosure provides an explosion-proof control logic method for a pulverized coal silo, including: Obtain the coal quality parameters of the raw coal in the pulverized coal storage bin of the generator set; wherein, the coal quality parameters include at least the volatile matter value used to characterize the volatile properties of the raw coal; Obtain environmental parameters inside the pulverized coal silo; Select the appropriate explosion-proof control strategy based on the range of volatile content; Based on the selected explosion-proof control strategy and the environmental parameters, the operating status of the generator set's inerting fire extinguishing system and powder storage system is controlled.
[0006] In conjunction with the first aspect, in one possible implementation, selecting the corresponding explosion-proof control strategy based on the range of volatile content includes: If the volatile content is greater than or equal to the first volatile content threshold, the first explosion-proof control strategy shall be selected. When the volatile content is between the second volatile content threshold and the first volatile content threshold, a second explosion-proof control strategy is selected; wherein the first volatile content threshold is greater than the second volatile content threshold; When the volatile content is less than or equal to the second volatile content threshold, the third explosion-proof control strategy is selected.
[0007] In conjunction with the first aspect, in one possible implementation, when a first explosion-proof control strategy is selected, controlling the operating state of the generator set's inerting fire suppression system and powder storage system based on the selected explosion-proof control strategy and the environmental parameters includes: When the first explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously activated; When the inerting fire extinguishing system is continuously on and the environmental parameters meet the first condition, the powder storage system is controlled to shut down.
[0008] In conjunction with the first aspect, in one possible implementation, the environmental parameters include: oxygen concentration, temperature, and smoke alarm status; The first condition is triggered if any of the following events are met: The oxygen concentration monitored inside the pulverized coal silo is greater than the oxygen concentration control threshold. The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
[0009] In conjunction with the first aspect, in one possible implementation, when a second explosion-proof control strategy is selected, controlling the operating state of the generator set's inerting fire suppression system and powder storage system based on the selected explosion-proof control strategy and the environmental parameters includes: When the environmental parameters meet the second condition and the second explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously activated. If the inerting fire extinguishing system is continuously on and the environmental parameters meet the third condition, the powder storage system shall be shut down.
[0010] In conjunction with the first aspect, in one possible implementation, the environmental parameters include temperature, carbon monoxide concentration, and lower explosive limit of combustible gas. The second condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the second temperature control threshold. The concentration of carbon monoxide gas monitored inside the pulverized coal silo is greater than the carbon monoxide warning threshold. The lower explosion limit of combustible gas monitored in the pulverized coal silo is greater than the lower explosion limit warning threshold.
[0011] In conjunction with the first aspect, in one possible implementation, when a third explosion-proof control strategy is selected, controlling the operating status of the generator set's inerting fire suppression system and powder storage system based on the selected explosion-proof control strategy and the environmental parameters includes: When the third explosion-proof control strategy is selected, the inerting fire extinguishing system is kept in the off state. When the inerting fire extinguishing system is not in the activated state and the environmental parameters meet the third condition, the powder storage system is controlled to shut down.
[0012] In conjunction with the first aspect, in one possible implementation, the environmental parameters include temperature and smoke alarm status; The third condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
[0013] A second aspect of this disclosure provides an explosion-proof control logic system for a pulverized coal silo, comprising: The first acquisition module is used to acquire the coal quality parameters of the raw coal in the pulverized coal silo of the pulverized coal storage system in the generator set; wherein, the coal quality parameters include at least the volatile matter value used to characterize the volatile properties of the raw coal; The second acquisition module is used to acquire environmental parameters inside the pulverized coal silo. The selection module is used to select the corresponding explosion-proof control strategy based on the range of volatile content. The control module is used to control the operating status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters.
[0014] A third aspect of this disclosure provides an electronic device, including: a processor, a memory, and a bus; The memory stores machine-readable instructions that can be executed by the processor; When the electronic device is running, the processor and the memory communicate via a bus; When the machine-readable instructions are executed by the processor, the steps of an explosion-proof control logic method for a pulverized coal silo as described in any of the first aspects are performed.
[0015] The beneficial effects of the embodiments disclosed herein include: This disclosure provides an explosion-proof control logic method, system, and electronic device for a pulverized coal silo. The method includes: acquiring coal quality parameters of the raw coal in the pulverized coal silo of a generator set's pulverized coal storage system; wherein the coal quality parameters include at least a volatile matter content (VPC) value characterizing the volatile properties of the raw coal; acquiring environmental parameters within the pulverized coal silo; selecting a corresponding explosion-proof control strategy based on the range of the VPC value; and controlling the operating status of the generator set's inerting fire suppression system and pulverized coal storage system based on the selected explosion-proof control strategy and the environmental parameters. This disclosure, by classifying and controlling the pulverized coal silo based on the differences in the VPC value of the raw coal and combining it with real-time acquired environmental parameters, can ensure safety while avoiding waste caused by excessive operation of the inerting system, thus achieving accuracy and efficiency in the explosion-proof control of the pulverized coal silo. Attached Figure Description
[0016] Figure 1 A flowchart illustrating an explosion-proof control logic method for a pulverized coal silo provided in this embodiment of the present disclosure; Figure 2 This is a schematic diagram of the explosion-proof control process provided in an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of an explosion-proof control logic system for a pulverized coal silo, provided in an embodiment of this disclosure. Detailed Implementation
[0017] This disclosure provides an explosion-proof control logic method, system, and electronic device for a pulverized coal silo. Preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this disclosure. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.
[0018] This disclosure provides an explosion-proof control logic method for a pulverized coal silo, such as... Figure 1 As shown, it can be implemented as follows: S101. Obtain the coal quality parameters of the raw coal in the pulverized coal silo of the pulverized coal storage system in the generator set. The coal quality parameters include at least the volatile matter content, which characterizes the volatile properties of raw coal. S102. Obtain environmental parameters inside the pulverized coal silo; S103. Select the corresponding explosion-proof control strategy based on the range of volatile content; S104. Based on the selected explosion-proof control strategy and the environmental parameters, control the working status of the generator set's inerting fire extinguishing system and powder storage system.
[0019] In this embodiment of the disclosure, the volatile matter content refers to the dry ash-free volatile matter content of raw coal. This refers to the mass fraction of volatile gaseous products released by the thermal decomposition of organic matter in raw coal, based on the pure organic matter in the coal and under high-temperature, air-isolated conditions specified in the standard, after deducting all moisture and ash content. This value can be obtained from the analysis results of an online coal quality analyzer or from manual testing conducted on batches of raw coal.
[0020] Environmental parameters are obtained through real-time monitoring of the pulverized coal silo by a monitoring system. The monitoring system can include various types of sensors to detect changes in different environmental parameters within the pulverized coal silo.
[0021] Based on the dry ash-free volatile matter of raw coal, multiple numerical ranges can be defined, each range corresponding to an explosion-proof control strategy. Then, based on the selected strategy and environmental parameters, the inerting fire extinguishing system and the powder storage system can be specifically controlled.
[0022] The pulverized coal storage system here refers to the pulverized coal storage system in the generator set. Its function is to complete the centralized collection, safe storage, stable transportation and distribution of pulverized coal. Specifically, it can include equipment such as separators, pulverized coal silos, feeders, conveyors and pulverizers. The sensors of the aforementioned monitoring system can be installed inside the pulverized coal silos of the pulverized coal storage system.
[0023] Inerting fire suppression systems are systems that provide safety protection for coal storage systems. They can fill coal silos with inert media (such as carbon dioxide, nitrogen, etc.), which can reduce the oxygen concentration in the coal silo to below the critical threshold for combustion and explosion of combustibles, thus inhibiting spontaneous combustion and explosion of coal silos.
[0024] It should be noted that the above process can be executed by the control system of a thermal power generating unit. By using this method, based on the differences in the volatile matter content of raw coal and combined with real-time collected environmental parameters for graded judgment and control, safety can be ensured while avoiding waste caused by excessive operation of the inerting system, thus achieving accuracy and efficiency in the explosion-proof control of the pulverized coal silo.
[0025] In another embodiment provided in this disclosure, the step S103 above, "selecting the corresponding explosion-proof control strategy according to the range of the volatile content", can be implemented as follows: S1031. When the volatile content is greater than or equal to the first volatile content threshold, select the first explosion-proof control strategy. S1032. When the volatile matter value is between the second volatile matter threshold and the first volatile matter threshold, a second explosion-proof control strategy is selected; wherein, the first volatile matter threshold is greater than the second volatile matter threshold. S1033. When the volatile content is less than or equal to the second volatile content threshold, select the third explosion-proof control strategy.
[0026] In this embodiment of the disclosure, when the volatile matter content of raw coal is greater than or equal to a first volatile matter threshold, it indicates that the raw coal has high volatile matter content and a high risk of deflagration. In one possible implementation, a typical value for the first volatile matter threshold can be 25%, i.e. In such cases, the first explosion-proof control strategy should be selected.
[0027] When the volatile matter content of raw coal falls between the second volatile matter threshold and the first volatile matter threshold, it indicates that the raw coal has moderate volatility and a certain risk of deflagration. In one possible implementation, a typical value for the second volatile matter threshold can be 10%, i.e. In such cases, the second explosion-proof control strategy should be selected.
[0028] When the volatile matter content of raw coal is less than or equal to the second volatile matter threshold, it indicates that the raw coal has low volatility and a low risk of deflagration. In one possible implementation, in In such cases, the third explosion-proof control strategy should be selected.
[0029] In another embodiment provided in this disclosure, when the first explosion-proof control strategy is selected, the step S104 above, "controlling the working state of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters," can be implemented as follows: S104A1. When the first explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously open. S104A2, when the inerting fire extinguishing system is continuously on and the environmental parameters meet the first condition, control the powder storage system to shut down.
[0030] In this embodiment of the disclosure, when the volatile matter content of the raw coal is greater than or equal to the first volatile matter threshold, i.e., when the first explosion-proof control strategy is selected, it indicates that the coal has a high risk of deflagration and requires a higher level of continuous protection. At this time, regardless of whether the current environmental parameters are abnormal, the control system can control the inerting fire extinguishing system to enter a continuously active state, continuously introducing inert medium into the pulverized coal silo, and actively suppressing the oxygen concentration in the silo below the lower explosive limit.
[0031] While maintaining the inerting fire suppression system continuously, environmental parameters are continuously monitored in real time. When the monitored environmental parameters meet the first condition, it indicates that there is a high risk of deflagration in the pulverized coal silo. The control system keeps the inerting fire suppression system running while simultaneously tripping and shutting down the pulverized coal storage system, i.e., stopping the equipment such as the pulverizer and coal mill that supply pulverized coal to the silo, thus cutting off the source of combustible material replenishment.
[0032] Through the above control method, for high volatile coal types, a safe inert atmosphere is first established and maintained through the inerting system, and then the coal supply is cut off in a timely manner according to the degree of environmental abnormality. This achieves more proactive explosion protection, which not only prevents the inerting treatment from being delayed under abnormal working conditions, but also avoids unnecessary frequent start-ups and shutdowns of the coal storage system, thus balancing safety and production continuity.
[0033] In another embodiment provided in this disclosure, the environmental parameters include: oxygen concentration, temperature, and smoke alarm status; The first condition is triggered if any of the following events are met: The oxygen concentration monitored inside the pulverized coal silo is greater than the oxygen concentration control threshold. The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
[0034] In this embodiment, the environmental parameters include three categories: oxygen concentration, temperature, and smoke alarm status. These three parameters reflect the safety status within the pulverized coal silo from different dimensions: oxygen concentration is used to determine whether the inerting protective atmosphere has been compromised; temperature is used to monitor for localized heating or spontaneous combustion tendencies; and the smoke alarm status is used to detect whether open flames or smoldering smoke particles have appeared. In one possible implementation, three oxygen concentration measuring points and five temperature monitoring points can be set up within the pulverized coal silo. If the data obtained from any measuring point reaches the corresponding threshold, it indicates that the overall environment within the pulverized coal silo has reached the corresponding threshold. Two smoke monitoring sensors can also be set up within the pulverized coal silo; if either sensor alarms, it indicates the presence of smoke within the pulverized coal silo.
[0035] The oxygen concentration control threshold is a preset safety limit based on the explosion characteristics, which can be set to 10% for example. When the oxygen concentration exceeds this threshold, it indicates that the inerting atmosphere in the chamber is insufficient to suppress deflagration, and corresponding control actions need to be triggered.
[0036] The first temperature control threshold is a warning value for judging abnormal temperature rise inside the chamber, which can be set to 70°C for example. When the temperature exceeds this threshold, it indicates that there may be dangerous conditions such as localized spontaneous combustion of powder or heat source intrusion inside the chamber, and corresponding control actions need to be triggered.
[0037] Smoke monitoring sensors are used to detect smoke produced by smoldering coal or open flames. When the sensor sends an alarm signal, it indicates that there are signs of combustion in the silo, and corresponding control actions need to be triggered.
[0038] If any one of the three conditions mentioned above is met, the environmental parameters are determined to meet the first condition, and the control system will execute the corresponding explosion-proof control action accordingly.
[0039] In another embodiment provided in this disclosure, when the second explosion-proof control strategy is selected, the step S104 above, "controlling the working state of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters," can be implemented as follows: S104B1. When the environmental parameters meet the second condition and the second explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously open. S104B2, When the inerting fire extinguishing system is continuously on and the environmental parameters meet the third condition, control the powder storage system to shut down.
[0040] In this embodiment, the second explosion-proof control strategy corresponds to a situation where the volatile matter content of the raw coal is at a moderate level. For such raw coal with moderate volatile matter content, sudden and violent deflagration is relatively unlikely to occur during normal operation. Therefore, it is necessary to progressively implement protective measures according to the phased changes in environmental parameters to balance safety protection with the continuity of equipment operation.
[0041] The second condition can refer to a situation where environmental parameters show an abnormal trend but are still in the initial warning stage. When environmental parameters meet this second condition, it indicates that there are safety hazards such as slow oxidation or localized slight self-heating in the pulverized coal silo, requiring active inerting measures to suppress their development. The control system switches the inerting fire extinguishing system to a continuously active state, continuously introducing inert media into the pulverized coal silo to reduce the oxygen concentration inside, prevent further acceleration of the oxidation reaction, and maintain the operating conditions within a controllable range.
[0042] After the inerting fire suppression system is kept continuously active, environmental parameters continue to be monitored. The third condition refers to a further deterioration of environmental parameters, reaching a level that threatens production safety and necessitates disconnecting the supply of combustibles. This indicates that inerting alone is insufficient to effectively contain the danger; continued supply of powder to the silo would continuously replenish combustibles, potentially escalating the accident.
[0043] Therefore, with the inerting fire extinguishing system continuously running, when the environmental parameters meet the third condition, the control system needs to further control the shutdown of the coal storage system, that is, stop the equipment such as the coal feeder and coal mill that transport coal powder to the coal powder silo, completely cut off the replenishment path of combustible materials, thereby preventing the escalation of abnormal operating conditions and ensuring the safety of the unit.
[0044] In yet another embodiment provided in this disclosure, the environmental parameters include temperature, carbon monoxide gas concentration, and lower explosive limit of combustible gas. The second condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the second temperature control threshold. The concentration of carbon monoxide gas monitored inside the pulverized coal silo is greater than the carbon monoxide warning threshold. The lower explosion limit of combustible gas monitored in the pulverized coal silo is greater than the lower explosion limit warning threshold.
[0045] In this embodiment, the environmental parameters include three items: temperature, carbon monoxide concentration, and lower explosive limit (LEL) of combustible gases. The temperature parameter reflects the thermal state within the pulverized coal silo. The carbon monoxide concentration parameter reflects the degree of pulverized coal oxidation. Coal preferentially produces carbon monoxide during the low-temperature oxidation stage, which is an early characteristic gas of spontaneous combustion in pulverized coal. The lower explosive limit (LEL) reflects the potential hazard of an explosion of the gas mixture within the silo. In one possible implementation, three carbon monoxide concentration measuring points, five temperature monitoring points, and two combustible gas sensors can be installed within the pulverized coal silo. If the data acquired by any measuring point or sensor reaches the corresponding threshold, it indicates that the overall environment within the pulverized coal silo has reached the corresponding threshold.
[0046] The second condition is the criterion for triggering the inerting fire suppression system to switch to a continuously active state. The second temperature control threshold is a lower warning value, distinct from the first temperature control threshold, and can be set to 45°C for example. When the temperature exceeds this threshold, it indicates that there is a certain tendency for spontaneous combustion inside the chamber, requiring active inerting intervention.
[0047] A carbon monoxide warning threshold is used to detect early abnormal oxidation phenomena and can be set to 200 ppm for example. When the carbon monoxide concentration exceeds this threshold, even if the temperature has not yet risen significantly, it indicates that the oxidation reaction has entered an active phase, and inerting measures should be taken in time.
[0048] The lower explosive limit warning threshold can be set to 25% for example. When the concentration of combustible gas reaches the warning ratio of its lower explosive limit, it indicates that the atmosphere inside the chamber is close to the deflagration range, and inerting measures must be initiated to dilute the combustible gas and reduce the risk of explosion.
[0049] If any one of the three conditions is met, the environmental parameters are deemed to meet the second condition, and the control system accordingly activates the inerting fire suppression system to remain continuously operational. This provides early warning of the situation inside the pulverized coal silo, ensuring proactive response in the early stages of hazard development and preventing further deterioration of the operating conditions.
[0050] In another embodiment provided in this disclosure, when a third explosion-proof control strategy is selected, the step S104 above, "controlling the working state of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters," can be implemented as follows: S104C1. When the third explosion-proof control strategy is selected, the inerting fire extinguishing system is kept in the off state. S104C2, When the inerting fire extinguishing system is not in the open state and the environmental parameters meet the third condition, control the powder storage system to shut down.
[0051] In this embodiment, the third explosion-proof control strategy corresponds to low-volatile raw coal. This type of coal powder has a weak tendency to spontaneously combust when stored in a silo, and the risk of deflagration is relatively low. Therefore, for this type of low-risk coal, this embodiment adopts the lowest level of protection strategy, without inerting protection during daily operation, and triggers necessary measures based on monitoring of environmental parameters.
[0052] Specifically, when the third explosion-proof control strategy is selected, the control system will set and keep the inerting fire extinguishing system in a non-activated state, and will not actively fill the coal powder silo with inert medium.
[0053] When the monitored environmental parameters meet the third condition, it indicates that an abnormal situation may have occurred in the pulverized coal silo. At this time, the control system does not activate the inerting fire extinguishing system, but directly controls the pulverized coal storage system to shut down, that is, stops the equipment such as the pulverizer and coal mill that supply pulverized coal to the pulverized coal silo, cuts off the replenishment path of combustibles, and prevents the abnormal condition from escalating further.
[0054] Furthermore, depending on the actual changes in environmental parameters, the control system can also activate the inerting fire suppression system to suppress abnormal conditions within the pulverized coal silo.
[0055] In another embodiment provided in this disclosure, the environmental parameters include temperature and smoke alarm status; The third condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
[0056] In this embodiment of the disclosure, the first temperature control threshold is a warning value for determining that an abnormal temperature rise has occurred inside the chamber, which can be set to 70°C for example. When the temperature exceeds this threshold, it indicates that there may be dangerous conditions such as localized spontaneous combustion of powder or heat source intrusion inside the chamber, and corresponding control actions need to be triggered.
[0057] Smoke monitoring sensors are used to detect smoke produced by smoldering coal or open flames. When the sensor sends an alarm signal, it indicates that there are signs of combustion in the silo, and corresponding control actions need to be triggered.
[0058] The following is combined with, for example Figure 2 The flowchart shown illustrates the explosion-proof control process, explaining the above content, such as... Figure 2 As shown, the coal quality of the coal fed into the coal powder silo must first be tested to obtain its coal quality parameters, and then the dry ash-free volatile matter in the coal quality parameters must be determined. Which interval does it fall into? According to... The appropriate explosion-proof control strategy can be selected for the specific area to ensure safety within the pulverized coal silo.
[0059] for Higher levels (e.g., For raw coal, the first explosion-proof control strategy needs to be implemented, continuously activating the inert fire extinguishing system and injecting inert medium into the pulverized coal silo. During the operation of the pulverized coal storage system, environmental parameters within the pulverized coal silo are monitored in real time. If any condition occurs, such as an oxygen concentration exceeding 10% at any measuring point, a temperature exceeding 70℃ at any temperature monitoring point, or an alarm from the smoke monitoring sensor, the first condition is triggered, causing the pulverized coal storage system to trip and shut down.
[0060] for At a moderate level (e.g., For raw coal, a second explosion-proof control strategy is required. This strategy involves real-time monitoring of environmental parameters within the pulverized coal silo. A second condition is triggered when any temperature at any monitoring point exceeds 45°C, any carbon monoxide concentration exceeds 200 ppm, or any combustible gas LEL exceeds 25%. This triggers the inert fire suppression system. Further, continuous real-time monitoring of environmental parameters within the pulverized coal silo is maintained. A third condition is triggered when any temperature monitoring point exceeds 70°C or a smoke detection sensor alarms, causing the coal storage system to trip and shut down.
[0061] for At a lower level (e.g., For raw coal, a third explosion-proof control strategy is required to monitor the environmental parameters inside the coal powder silo in real time. When any temperature monitoring point in the coal powder silo exceeds 70°C or the smoke monitoring sensor alarms, the third condition is triggered, causing the coal powder storage system to trip and shut down.
[0062] It should be noted that the above data is for illustrative purposes only and can be adjusted according to actual production needs; there are no restrictions on this.
[0063] This disclosure also provides an explosion-proof control logic system for a pulverized coal silo, such as... Figure 3 As shown, it includes: The first acquisition module 301 is used to acquire the coal quality parameters of the raw coal in the pulverized coal silo of the pulverized coal storage system in the generator set; wherein, the coal quality parameters include at least the volatile matter value used to characterize the volatile properties of the raw coal; The second acquisition module 302 is used to acquire environmental parameters inside the pulverized coal silo. Select module 303 to select the corresponding explosion-proof control strategy based on the range of volatile content; The control module 304 is used to control the working status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters.
[0064] In another embodiment provided in this disclosure, the selection module 303 is used to select a first explosion-proof control strategy when the volatile content is greater than or equal to a first volatile content threshold; select a second explosion-proof control strategy when the volatile content is between a second volatile content threshold and the first volatile content threshold; wherein the first volatile content threshold is greater than the second volatile content threshold; and select a third explosion-proof control strategy when the volatile content is less than or equal to the second volatile content threshold.
[0065] In another embodiment provided in this disclosure, the control module 304 is used to control the inerting fire extinguishing system to be continuously activated when a first explosion-proof control strategy is selected; and to control the powder storage system to be shut down when the inerting fire extinguishing system is continuously activated and the environmental parameters meet a first condition.
[0066] In another embodiment provided in this disclosure, the control module 304 is configured to control the inerting fire extinguishing system to be continuously activated when the environmental parameters meet the second condition and the second explosion-proof control strategy is selected; and to control the powder storage system to be shut down when the inerting fire extinguishing system is continuously activated and the environmental parameters meet the third condition.
[0067] In another embodiment provided in this disclosure, the control module 304 is used to control the inerting fire extinguishing system to be in a non-open state when a third explosion-proof control strategy is selected; and to control the powder storage system to shut down when the inerting fire extinguishing system is in a non-open state and the environmental parameters meet the third condition.
[0068] This disclosure also provides an electronic device, including: a processor, a memory, and a bus; The memory stores machine-readable instructions that can be executed by the processor; When the electronic device is running, the processor and the memory communicate via a bus; When the machine-readable instructions are executed by the processor, the steps of an explosion-proof control logic method for a pulverized coal silo, as described in any of the above embodiments, are performed.
[0069] This disclosure has at least the following beneficial effects: the method provided by this disclosure can set the explosion-proof control logic of the pulverized coal silo for different coal quality conditions, effectively reduce the risk of pulverized coal silo explosion, ensure the safe operation of equipment, and has high social and technical and economic benefits. Moreover, the logic is clear and the operation is highly operable.
[0070] Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments of this disclosure can be implemented in hardware or by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions of the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.
[0071] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily essential for implementing this disclosure.
[0072] Those skilled in the art will understand that the modules in the system of the embodiments can be distributed in the system of the embodiments as described in the embodiments, or they can be located in one or more systems different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.
[0073] The sequence numbers of the embodiments disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0074] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.
Claims
1. A method for explosion-proof control logic of a pulverized coal silo, characterized in that, include: Obtain the coal quality parameters of the raw coal in the pulverized coal storage bin of the generator set; wherein, the coal quality parameters include at least the volatile matter value used to characterize the volatile properties of the raw coal; Obtain environmental parameters inside the pulverized coal silo; Select the appropriate explosion-proof control strategy based on the range of volatile content; Based on the selected explosion-proof control strategy and the environmental parameters, the operating status of the generator set's inerting fire extinguishing system and powder storage system is controlled.
2. The method as described in claim 1, characterized in that, The selection of the corresponding explosion-proof control strategy based on the range of volatile content includes: If the volatile content is greater than or equal to the first volatile content threshold, the first explosion-proof control strategy shall be selected. When the volatile content is between the second volatile content threshold and the first volatile content threshold, a second explosion-proof control strategy is selected; wherein the first volatile content threshold is greater than the second volatile content threshold; When the volatile content is less than or equal to the second volatile content threshold, the third explosion-proof control strategy is selected.
3. The method as described in claim 2, characterized in that, When the first explosion-proof control strategy is selected, controlling the operating status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters includes: When the first explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously activated; When the inerting fire extinguishing system is continuously on and the environmental parameters meet the first condition, the powder storage system is controlled to shut down.
4. The method as described in claim 3, characterized in that, The environmental parameters include: oxygen concentration, temperature, and smoke alarm status; The first condition is triggered if any of the following events are met: The oxygen concentration monitored inside the pulverized coal silo is greater than the oxygen concentration control threshold. The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
5. The method as described in claim 2, characterized in that, When the second explosion-proof control strategy is selected, controlling the operating status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters includes: When the environmental parameters meet the second condition and the second explosion-proof control strategy is selected, the inerting fire extinguishing system is controlled to be continuously activated. If the inerting fire extinguishing system is continuously on and the environmental parameters meet the third condition, the powder storage system shall be shut down.
6. The method as described in claim 5, characterized in that, The environmental parameters include temperature, carbon monoxide concentration, and lower explosive limit of combustible gases. The second condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the second temperature control threshold. The concentration of carbon monoxide gas monitored inside the pulverized coal silo is greater than the carbon monoxide warning threshold. The lower explosion limit of combustible gas monitored in the pulverized coal silo is greater than the lower explosion limit warning threshold.
7. The method as described in claim 2, characterized in that, When the third explosion-proof control strategy is selected, controlling the operating status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters includes: When the third explosion-proof control strategy is selected, the inerting fire extinguishing system is kept in the off state. When the inerting fire extinguishing system is not in the activated state and the environmental parameters meet the third condition, the powder storage system is controlled to shut down.
8. The method as described in any one of claims 5 or 7, characterized in that, The environmental parameters include temperature and smoke alarm status; The third condition is triggered if any of the following events are met: The temperature monitored inside the pulverized coal silo is higher than the first temperature control threshold. An alarm signal was detected from the smoke monitoring sensor inside the pulverized coal silo.
9. An explosion-proof control logic system for a pulverized coal silo, characterized in that, include: The first acquisition module is used to acquire the coal quality parameters of the raw coal in the pulverized coal silo of the pulverized coal storage system in the generator set; wherein, the coal quality parameters include at least the volatile matter value used to characterize the volatile properties of the raw coal; The second acquisition module is used to acquire environmental parameters inside the pulverized coal silo. The selection module is used to select the corresponding explosion-proof control strategy based on the range of volatile content. The control module is used to control the operating status of the generator set's inerting fire extinguishing system and powder storage system according to the selected explosion-proof control strategy and the environmental parameters.
10. An electronic device, characterized in that, include: Processor, memory, and bus; The memory stores machine-readable instructions that can be executed by the processor; When the electronic device is running, the processor and the memory communicate via a bus; When the machine-readable instructions are executed by the processor, they perform the steps of an explosion-proof control logic method for a pulverized coal silo as described in any one of claims 1-8.