System and method for detecting dust concentration at outlet of dust remover of coal-fired power plant in partitioned manner

Abstract

The invention provides a system and a method for detecting dust concentration at an outlet of a dust remover of a coal-fired power plant in a partitioned manner, and belongs to the technical field of dust concentration detection. Sequentially or simultaneously driving the flue gas samples in the corresponding subareas to flow to the dust concentration detection system based on each or some negative pressure; or sampling the flue gas of the corresponding subarea based on the single negative pressure, and driving the flue gas sample of the corresponding subarea to flow to the detection system based on the single negative pressure; the dust concentration detection system detects the dust concentration in the flue gas sample in real time; and the control system controls the sampling system to be started and stopped in sequence during alternate sampling of all the partitions, or started and stopped at the same time during simultaneous sampling of all the partitions, or started and stopped during sampling of a single partition, or started and stopped in sequence or at the same time during sampling of some partitions. According to the scheme, the dust concentration of each dust chamber can be accurately detected in real time.

Description

Technical Field

[0001] The present application relates to the technical field of dust concentration detection, and in particular to a system and method for detecting dust concentration at a partitioned outlet of a dust collector in a coal-fired power plant. Background Art

[0002] At present, the phenomenon of ammonia escape from denitrification is common in coal-fired power plants. The escaped ammonia reacts with sulfur trioxide in the flue gas to form ammonium bisulfate, which causes the electrode wire to be coated with dust, thereby affecting the dust removal efficiency. In addition, the dust removal efficiency of each dust chamber is inconsistent, making it difficult to accurately grasp the actual dust removal effect.

[0003] In the prior art, conventional dust concentration detection systems can only detect the dust concentration of the main pipe, and cannot accurately reflect the dust removal efficiency of each dust chamber in real time. Therefore, how to accurately detect the dust concentration of each dust chamber in real time has become a problem to be solved. Summary of the invention

[0004] The purpose of the present application is to provide a system and method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partition, which can solve the problem of how to accurately detect the dust concentration of each dust chamber in real time in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a system for detecting dust concentration at a coal-fired power plant dust collector outlet by partition, the system comprising: The partitioned negative pressure supply sampling system is used to generate a single or multiple negative pressures according to the start and stop status of the sampling system corresponding to each or several partitions, and to sample the flue gas of the corresponding partitions in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and to drive the flue gas samples of the corresponding partitions in sequence or simultaneously based on each or several negative pressures, so that they flow from the corresponding flue gas pipeline to the dust concentration detection system; Alternatively, based on a single negative pressure, the flue gas of the corresponding partition is sampled to obtain a single flue gas sample, and based on the single negative pressure, the flue gas sample of the corresponding partition is driven to flow from the corresponding flue gas pipeline to the dust concentration detection system; each partition is a dust chamber for dust removal at the outlet of the dust collector; The dust concentration detection system is used to detect the dust concentration in the received flue gas sample in real time and transmit the corresponding dust concentration detection results to the control system; The control system is used to control the partitioned negative pressure supply sampling system to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and to obtain the corresponding dust concentration detection results in real time.

[0006] In a possible implementation of the first aspect, the partitioned negative pressure supply sampling system includes: n dust sampling guns and n negative pressure generating devices, and the dust concentration detection system includes: a dust concentration detector and a main pipe of the dust collector; each negative pressure generating device is connected to each dust chamber, each dust sampling gun is connected to each negative pressure generating device and then placed in each dust chamber, each negative pressure generating device is connected to the dust concentration detector through a corresponding flue gas pipeline, and the dust concentration detector is connected to the main pipe of the dust collector and the control system; Each negative pressure generating device is used to generate negative pressure, transmit the negative pressure to the connected dust sampling gun, suck the flue gas sample of the corresponding dust chamber based on the negative pressure, and drive each flue gas sample to flow from the corresponding flue gas pipeline to the dust concentration detector; each dust sampling gun is used to sample the flue gas in the dust chamber based on the negative pressure generated by the connected negative pressure generating device, and obtain the corresponding flue gas sample.

[0007] In a possible implementation of the first aspect, the control system includes: a data acquisition module, a data transmission module and a control module; the data acquisition module is used to collect dust concentration and start / stop status signals of the partitioned negative pressure supply sampling system; the data transmission module is used to transmit the dust concentration and start / stop status signals to the control module in real time using wired or wireless communication technology; The control module is used to receive, process and store dust concentration and start-stop status signals, and control the partitioned negative pressure supply sampling system to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and to record the dust concentration detection results while the partitioned negative pressure supply sampling system is in the started state.

[0008] In a possible implementation of the first aspect, the control module is further configured to trigger an alarm signal based on an abnormality detection logic when an abnormal dust concentration detection result or equipment failure is detected, and control the alarm device to sound an alarm according to the alarm signal.

[0009] In a possible implementation of the first aspect, the control module is also used to calculate the overall dust removal efficiency of the dust collector based on the dust concentration, and calculate the proportion of normal dust chambers. When the proportion is less than a preset proportion threshold, an alarm mechanism is triggered, and the alarm device is controlled to sound an alarm according to the alarm mechanism; wherein the proportion of normal dust chambers is the proportion of the number of dust chambers with a dust concentration less than the preset dust concentration threshold to the total number of dust chambers.

[0010] In a possible implementation of the first aspect, the system for detecting dust concentration also includes a data processing and display unit; the data processing and display unit is used to receive data from the control system, process the received data, and display the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers in real time, and store the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers within a preset time range.

[0011] In a second aspect, an embodiment of the present application provides a method for detecting dust concentration at a coal-fired power plant dust collector outlet by partitioning, based on a system for detecting dust concentration at a coal-fired power plant dust collector outlet by partitioning according to any one of the first aspects, the method comprising: Based on the partitioned negative pressure supply sampling system, a single or multiple negative pressures are generated according to the start and stop status of the sampling system corresponding to each or several partitions, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system; or, based on a single negative pressure, the flue gas of the corresponding partition is sampled to obtain a single flue gas sample, and based on a single negative pressure, the flue gas sample of the corresponding partition is driven to flow from the corresponding flue gas pipeline to the dust concentration detection system; each partition is a dust chamber for dust removal at the outlet of the dust collector; Based on the dust concentration detection system, the dust concentration in the received flue gas samples is detected in real time, and the corresponding dust concentration detection results are transmitted to the control system; based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled, and the corresponding dust concentration detection results are obtained in real time.

[0012] In a possible implementation of the second aspect, the partitioned negative pressure supply sampling system includes: n dust sampling guns and n negative pressure generating devices, and the dust concentration detection system includes: a dust concentration detector and a main pipe of a dust collector; according to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system, including: Based on each negative pressure generating device, multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun; when a negative pressure generating device is in the start state, the other negative pressure devices are in the stop state; Based on each dust sampling gun, according to each negative pressure, in turn, in a preset rotation order and a preset patrol cycle, the flue gas in each dust chamber is sampled in patrol to obtain the corresponding flue gas sample; based on each negative pressure generating device, the flue gas sample of the corresponding dust chamber is sucked according to each negative pressure, and each flue gas sample is driven in turn from the corresponding flue gas pipeline to the dust concentration detector.

[0013] In a possible implementation of the second aspect, a single or multiple negative pressures are generated according to the start / stop status of the sampling system corresponding to each or several partitions, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system, further comprising: Based on each negative pressure generating device, multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun; based on each dust sampling gun, the flue gas in each dust chamber is sampled simultaneously according to each negative pressure to obtain multiple flue gas samples; based on each negative pressure generating device, the flue gas samples of the corresponding dust chamber are sucked simultaneously according to each negative pressure, and each flue gas sample is driven in turn from the corresponding flue gas pipeline to the dust concentration detector to obtain a total flue gas sample.

[0014] In a possible implementation of the second aspect, a single or multiple negative pressures are generated according to the start / stop status of the sampling system corresponding to each or several partitions, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system, further comprising: Based on the negative pressure generating devices corresponding to several dust chambers, multiple negative pressures are generated according to the corresponding start and stop states, and the negative pressures are transmitted to the connected dust sampling guns; based on the several dust sampling guns, the smoke in the several dust chambers is sampled in turn or simultaneously according to the several negative pressures to obtain multiple smoke samples; Based on the several negative pressure generating devices, the smoke samples of the corresponding dust chambers are sucked sequentially or simultaneously according to the several negative pressures, and the several smoke samples are driven sequentially or simultaneously to flow from the corresponding smoke pipelines to the dust concentration detector.

[0015] In a possible implementation of the second aspect, based on a single negative pressure, the smoke of the corresponding partition is sampled to obtain a single smoke sample, and based on the single negative pressure, the smoke sample of the corresponding partition is driven to flow from the corresponding smoke pipeline to the dust concentration detection system, including: Based on the negative pressure generating device corresponding to a dust chamber, a single negative pressure is generated according to the corresponding start and stop status, and the negative pressure is transmitted to the connected dust sampling gun; based on the dust sampling gun, the flue gas in the dust chamber is sampled according to the negative pressure to obtain the corresponding flue gas sample; based on the negative pressure generating device, the flue gas sample is sucked according to the negative pressure, and the flue gas sample is driven to flow from the corresponding flue gas pipeline to the dust concentration detector.

[0016] In a possible implementation of the second aspect, based on a control system, the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when each partition is rotated for sampling, including: based on the control system, the switches of each negative pressure generating device are switched in sequence to control each negative pressure generating device to start and stop in sequence when the dust sampling gun is rotated for sampling in the corresponding dust chamber.

[0017] In a possible implementation of the second aspect, based on a control system, the partitioned negative pressure supply sampling system is controlled to start and stop simultaneously when sampling is simultaneously performed in each partition, including: based on the control system, the switches of each negative pressure generating device are simultaneously switched to control each negative pressure generating device to start and stop simultaneously when the dust sampling guns are simultaneously sampling in the corresponding dust chambers.

[0018] In a possible implementation of the second aspect, based on a control system, the partitioned negative pressure supply sampling system is controlled to start and stop when sampling a single partition, including: based on the control system, turning on the switch of a negative pressure generating device and turning off the switches of the remaining negative pressure generating devices, so that when the dust sampling gun is sampling in the corresponding dust chamber, the negative pressure generating device is controlled to start and the remaining negative pressure generating devices are controlled to stop.

[0019] In a possible implementation of the second aspect, based on the control system, controlling the partitioned negative pressure supply sampling system to start and stop sequentially or simultaneously when sampling certain partitions includes: Based on the control system, the switches of some negative pressure generating devices are switched on and the switches of the remaining negative pressure generating devices are turned off, so that when the dust sampling gun is sampling in the corresponding dust chamber, the several negative pressure generating devices are controlled to start and stop in sequence or at the same time, and the remaining negative pressure generating devices are controlled to stop.

[0020] In a possible implementation of the second aspect, the control system includes: a data acquisition module, a data transmission module, and a control module; the method further includes: Based on the data acquisition module, the dust concentration and the start and stop status signals of the partitioned negative pressure supply sampling system are collected; based on the data transmission module, the dust concentration and the start and stop status signals are transmitted to the control module in real time using wired or wireless communication technology; Based on the control module, the dust concentration and start-stop status signals are received, processed and stored, and the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled, and the dust concentration detection results are recorded while the partitioned negative pressure supply sampling system is in the started state.

[0021] In a possible implementation manner of the second aspect, the method further includes: Based on the control module and according to the abnormal detection logic, when an abnormal dust concentration detection result or equipment failure is detected, an alarm signal is triggered and the alarm device is controlled to sound an alarm according to the alarm signal.

[0022] In a possible implementation manner of the second aspect, the method further includes: Based on the control module, the overall dust removal efficiency of the dust collector is calculated according to the dust concentration, and the proportion of normal dust chambers is calculated. When the proportion is less than the preset ratio threshold, the alarm mechanism is triggered, and the alarm device is controlled to alarm according to the alarm mechanism; wherein, the proportion of normal dust chambers is: the proportion of dust chambers with less than the preset dust concentration threshold to the total number of dust chambers.

[0023] In a possible implementation manner of the second aspect, the system for detecting dust concentration further includes a data processing and display unit; and the method further includes: Based on the data processing and display unit receiving the data of the control system, the received data is processed, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of the normal dust chamber are displayed in real time, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of the normal dust chamber within a preset time range are stored.

[0024] In a third aspect, an embodiment of the present application provides a device for detecting dust concentration at a zonal outlet of a dust collector in a coal-fired power plant, the device comprising: A sampling unit is used to supply a sampling system based on a partitioned negative pressure, generate a single or multiple negative pressures according to the start and stop states of the sampling systems corresponding to each or several partitions, perform rounds or simultaneous sampling of the flue gas in the corresponding partitions based on each or several negative pressures to obtain multiple flue gas samples, and drive the flue gas samples in the corresponding partitions in sequence or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system; or, sample the flue gas in the corresponding partition based on a single negative pressure to obtain a single flue gas sample, and drive the flue gas samples in the corresponding partition based on a single negative pressure to flow from the corresponding flue gas pipeline to the dust concentration detection system; each partition is a dust chamber for dust removal at the outlet of the dust collector; A detection unit, for detecting the dust concentration in the received flue gas sample in real time based on the dust concentration detection system, and transmitting the corresponding dust concentration detection result to the control system; The control unit is used to control the partition negative pressure supply sampling system to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, based on the control system, and to obtain the corresponding dust concentration detection results in real time.

[0025] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for detecting dust concentration in a partitioned manner at the outlet of a dust collector in a coal-fired power plant according to any one of the second aspects described above is implemented.

[0026] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the method for detecting dust concentration in the outlet of a coal-fired power plant dust collector by partitioning any one of the above-mentioned second aspects.

[0027] In a sixth aspect, an embodiment of the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes any one of the methods for detecting dust concentration in a partitioned manner at the outlet of a dust collector in a coal-fired power plant described in the second aspect.

[0028] In the present application, the zoned negative pressure supply sampling system samples the flue gas in the corresponding zones in rotation or simultaneously based on each or several negative pressures, and drives the flue gas samples in the corresponding zones to flow to the dust concentration detection system in sequence or simultaneously based on each or several negative pressures; or, samples the flue gas in the corresponding zones based on a single negative pressure, and drives the flue gas samples in the corresponding zones to flow to the detection system based on the single negative pressure; the dust concentration detection system detects the dust concentration in the flue gas samples in real time; the control system controls the sampling system to start and stop in sequence when sampling in each zone in rotation, or to start and stop simultaneously when sampling in each zone at the same time, or to start and stop when sampling in a single zone, or to start and stop in sequence or simultaneously when sampling in several zones.

[0029] The present application scheme first samples the smoke in each dust chamber through a zoned negative pressure supply sampling system based on the control of the control system, and then detects the dust concentration through a dust concentration detection system. It can accurately detect the dust concentration in each dust chamber in real time and has strong ease of use and practicality.

[0030] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a schematic diagram of the overall structure of a system for detecting dust concentration at the outlet of a dust collector of a coal-fired power plant provided in an embodiment of the present application; Figure 2 It is a schematic diagram of the specific structure of the system for detecting dust concentration at the outlet of a dust collector of a coal-fired power plant provided in an embodiment of the present application; Figure 3 It is a schematic diagram of the specific structure of the system for detecting dust concentration at the outlet of a dust collector of a coal-fired power plant provided in an embodiment of the present application; Figure 4 It is a schematic diagram of the steps of the method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partition provided in an embodiment of the present application; Figure 5 It is a structural schematic diagram of a device for detecting dust concentration at the outlet of a coal-fired power plant dust collector provided in an embodiment of the present application; Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known methods, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0034] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or photovoltaic components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, photovoltaic components and / or combinations thereof.

[0035] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0036] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0038] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0040] At present, the phenomenon of ammonia escape from denitrification is common in coal-fired power plants. The escaped ammonia reacts with sulfur trioxide in the flue gas to form ammonium bisulfate, which causes the electrode wire to be coated with dust, thereby affecting the dust removal efficiency. In addition, the dust removal efficiency of each dust chamber is inconsistent, making it difficult to accurately grasp the actual dust removal effect.

[0041] Among them, the phenomenon of ammonia escape in power plant denitrification refers to the phenomenon that in industrial processes such as coal-fired power plants, ammonia is used as a reducing agent in the denitrification process. Due to technical, operational or equipment reasons, some ammonia is not completely reacted and is emitted into the atmosphere with the flue gas.

[0042] In the prior art, a dust collector intelligent control method and system based on dust concentration monitoring involves bag dust collector control technology. By acquiring dust concentration data and dust image data, the effective dust removal particle size threshold and the maximum dust accumulation tolerance threshold are determined; dust particle size ratio analysis is performed based on the dust image data to determine the effective dust particle size ratio; dust concentration data is corrected based on the effective dust particle size ratio to generate standard dust concentration data; bag dust accumulation is predicted based on the standard dust concentration data and the inlet flue gas flow rate to generate the bag predicted dust accumulation; when the bag predicted dust accumulation meets the maximum dust accumulation tolerance threshold, the pulse valve is started at the command activation time node to perform airflow flushing.

[0043] The method can solve the technical problem of low dust removal control accuracy in the existing bag dust collector control method, and can improve the accuracy of dust removal control of the bag dust collector. The method can detect the dust concentration of the dust collector, but cannot independently detect each dust chamber.

[0044] A device for detecting the dust concentration at the outlet of a dry electrostatic precipitator, the device is equipped with charge detection devices at the upper and lower parts of the outlet of the electrostatic precipitator, and the purpose of detecting the dust concentration at the outlet of the electrostatic precipitator is achieved by detecting the difference in the amount of collected charge. By instantly detecting the dust concentration at the outlet of the electrostatic precipitator, the operation of the high-voltage power supply and the vibration device of the electrostatic precipitator is automatically controlled, so that energy-saving operation is achieved while meeting the dust emission requirements, and the electrostatic precipitator is operated in the most suitable working state. When the dust emission exceeds the standard, rapid detection can also quickly alarm. The device installs a detection device at the outlet of the dust collector to detect the dust concentration, and only detects the total emission, and cannot detect the efficiency of each dust chamber.

[0045] In coal-fired power plants, there is a phenomenon of denitrification ammonia escape and its subsequent problems, such as the generation of ammonium bisulfate, dust wrapping of electrode wires, reduced dust removal efficiency, and inconsistent efficiency of each dust removal chamber. However, in the prior art, conventional dust concentration detection systems can only detect the dust concentration of the main pipe, and cannot accurately reflect the dust removal efficiency of each dust chamber in real time, nor can they reflect the dust removal effect of each dust chamber. Therefore, how to accurately detect the dust concentration of each dust chamber in real time has become a problem to be solved.

[0046] In response to the above-mentioned defects, an embodiment of the present application provides a system and method for detecting dust concentration in a zoned manner at the outlet of a dust collector in a coal-fired power plant. The zoned negative pressure supply sampling system performs a round-robin or simultaneous sampling of the flue gas in the corresponding zones based on each or several negative pressures, and drives the flue gas samples in the corresponding zones to flow to the dust concentration detection system in sequence or simultaneously based on each or several negative pressures; alternatively, the flue gas in the corresponding zone is sampled based on a single negative pressure, and the flue gas samples in the corresponding zone are driven to flow to the detection system based on the single negative pressure; the dust concentration detection system detects the dust concentration in the flue gas sample in real time; the control system controls the sampling system to start and stop in sequence when sampling in each zone in rounds, or to start and stop simultaneously when sampling in each zone at the same time, or to start and stop when sampling in a single zone, or to start and stop in sequence or simultaneously when sampling in several zones.

[0047] The present application scheme first samples the flue gas in each dust chamber through a zoned negative pressure supply sampling system based on the control of the control system, and then detects the dust concentration through a dust concentration detection system. It can accurately detect the dust concentration of each dust chamber in real time, provide a scientific basis for the operation and maintenance management of coal-fired power plants, and has strong ease of use and practicality.

[0048] The specific process implemented by this application is introduced below through specific embodiments.

[0049] See also Figure 1 , Figure 1 1 is a schematic diagram of the overall structure of a system 100 for detecting dust concentration at the outlet of a coal-fired power plant dust collector provided in an embodiment of the present application. Figure 1 As shown, the system 100 includes: a zoned negative pressure supply sampling system 110 , a dust concentration detection system 120 and a control system 130 .

[0050] In some embodiments, the partitioned negative pressure supply sampling system 110 is used to generate a single or multiple negative pressures according to the start and stop status of the sampling systems corresponding to each or several partitions, and based on each or several negative pressures, the flue gas in the corresponding partitions is patrolled or sampled simultaneously to obtain multiple flue gas samples, and based on each or several negative pressures, the flue gas samples in the corresponding partitions are driven sequentially or simultaneously from the corresponding flue gas pipelines to the dust concentration detection system 120.

[0051] The partitioned negative pressure supply sampling system 110 can generate negative pressure by mechanical or pneumatic means.

[0052] In one embodiment, the partitioned negative pressure supply sampling system 110 is also used to sample the flue gas in the corresponding partition based on a single negative pressure to obtain a single flue gas sample, and drive the flue gas sample in the corresponding partition to flow from the corresponding flue gas pipeline to the dust concentration detection system 120 based on the single negative pressure. Each partition (dust chamber 1-n) is a dust chamber for dust removal at the outlet of the dust collector.

[0053] In some embodiments, the dust concentration detection system 120 is used to detect the dust concentration in the received flue gas sample in real time, and transmit the corresponding dust concentration detection result to the control system 130. The dust concentration detection system 120 is in a real-time monitoring state, and is linked with the control system 130 to ensure real-time transmission of detection data.

[0054] In one embodiment, when the zoned negative pressure supply sampling system 110 performs round-robin sampling in sequence (forming round-robin zoned smoke extraction), the dust concentration detection system 120 receives a smoke sample each time and detects the dust concentration in the smoke sample in real time.

[0055] In another embodiment, when the partitioned negative pressure supply sampling system 110 is sampling simultaneously, the dust concentration detection system 120 receives multiple flue gas samples simultaneously, and the multiple flue gas samples are combined into a total flue gas sample. The dust concentration detection system 120 detects the dust concentration in the total flue gas sample in real time.

[0056] In another embodiment, when the zoned negative pressure supply sampling system 110 samples only one dust chamber, the dust concentration detection system 120 receives a flue gas sample and detects the dust concentration in the flue gas sample in real time.

[0057] In some embodiments, the control system 130 is used to control the partitioned negative pressure supply sampling system 110 to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and to obtain the corresponding dust concentration detection results in real time.

[0058] In this embodiment, it is possible to extract the flue gas from all dust chambers and detect the dust concentration of each dust chamber in turn. Furthermore, the dust concentration of some dust chambers or a single dust chamber can be detected according to the actual situation. The various systems cooperate with each other to achieve accurate detection and monitoring of the dust concentration of each partition at the dust collector outlet.

[0059] See also Figure 2 , Figure 2 1 is a schematic diagram of a specific structure of a system 100 for detecting dust concentration at the outlet of a coal-fired power plant dust collector provided in an embodiment of the present application. Figure 2 As shown, the partitioned negative pressure supply sampling system 110 includes: n dust sampling guns (111, 113~11i) and n negative pressure generating devices (negative pressure generators) [112, 114~11(i+1)], and the dust concentration detection system 120 includes: a dust concentration detector 122 and a main pipe 124 of the dust collector.

[0060] In some embodiments, each negative pressure generating device [112, 114~11(i+1)] is connected to each dust chamber (1~n), each dust chamber has an independent negative pressure generating device, and each dust sampling gun (111, 113~11i) is connected to each negative pressure generating device [112, 114~11(i+1)] and then placed in each dust chamber. Each negative pressure generating device [112, 114~11(i+1)] is connected to a dust concentration detector 122 through a corresponding flue gas pipeline, and the dust concentration detector 122 is connected to the main pipe 124 of the dust collector and the control system 130.

[0061] The negative pressure generating device may be a pump for sucking smoke out of the dust chamber. A smoke sampler also has a similar function, but is usually used to detect smoke components. However, a smoke sampler can implement the present application solution, so a smoke sampler can be used to replace the negative pressure generating device and the dust sampling gun.

[0062] In some embodiments, a dust concentration detector 122 is installed on the main pipe 124 of the dust collector, and the position of the dust concentration detector 122 should be selected at a position where the flue gas flow is stable in the main pipe 124. The dust concentration detector 122 is used to detect the dust concentration in the flue gas sample flowing through the main pipe 124 in real time. The dust concentration detector 122 is connected to the control system 130 to ensure the real-time transmission of the detection data.

[0063] In some embodiments, each negative pressure generating device is used to generate negative pressure, transmit the negative pressure to the connected dust sampling gun, suck the smoke sample of the corresponding dust chamber based on the negative pressure, and drive each smoke sample from the corresponding smoke pipeline to the dust concentration detector 122. Each dust sampling gun is used to sample the smoke in the dust chamber based on the negative pressure generated by the connected negative pressure generating device to obtain the corresponding smoke sample. When sampling, the dust sampling gun can sample at any sampling point in the dust chamber.

[0064] In some embodiments, the negative pressure generating device is controlled by the control system 130 to start and stop, so as to realize patrol sampling between different dust chambers. The negative pressure generating device can work independently, and each dust chamber has a negative pressure generating device responsible for sucking the smoke in the dust chamber. When the negative pressure generating device is running, the smoke in the dust chamber is extracted by negative pressure, and only the smoke in the dust chamber flows into the main pipe 124, and the negative pressure generating devices of other dust chambers do not work, and no smoke flows.

[0065] In other embodiments, the control system 130 can also control the negative pressure generating devices [112, 114~11(i+1)] to work simultaneously, extract the smoke from all dust chambers into the dust concentration detector 122 for detection, and detect the overall smoke treatment status of the dust collector.

[0066] See also Figure 3 , Figure 31 is a schematic diagram of a specific structure of a system 100 for detecting dust concentration at a coal-fired power plant dust collector outlet according to an embodiment of the present application. Figure 2 and Figure 3 The control system 130 includes: a data acquisition module 132, a data transmission module 134 and a control module 136. The data acquisition module 132 is used to collect dust concentration and start / stop status signals of the partitioned negative pressure supply sampling system 110, and the data transmission module 134 is used to transmit the dust concentration and start / stop status signals to the control module 136 in real time using wired or wireless communication technology.

[0067] In some embodiments, a suitable wired or wireless communication transmission mode can be selected according to the on-site environment and transmission distance of the coal-fired power plant. Wired communication such as RS485, Ethernet, etc. is suitable for occasions with short transmission distance and stable environment.

[0068] In some embodiments, the control module 136 is the core of the control system 130, and receives, processes, stores and logically controls the dust concentration and start-stop status signals through the control program to realize the control of the start and stop of each negative pressure generating device. The control module 136 controls the partitioned negative pressure supply sampling system 110 to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled. While the partitioned negative pressure supply sampling system 110 is in the startup state, the control module 136 records the dust concentration detection results.

[0069] In some embodiments, according to the opening and closing state of the negative pressure generating device in each dust chamber, the data of the dust concentration detector 122 at the same time is recorded, thereby recording the dust concentration of the corresponding dust chamber. It is ensured that when the negative pressure generating device is working, it corresponds to the real-time data of the dust concentration detector 122, and accurately records the dust concentration data of the corresponding dust chamber.

[0070] According to one embodiment of the present application, the control module 136 is also used to automatically trigger an alarm signal based on abnormal detection logic when an abnormal dust concentration detection result or equipment failure is detected, and control the alarm device to sound an alarm according to the alarm signal.

[0071] According to an embodiment of the present application, the control module 136 is also used to calculate the overall dust removal efficiency of the dust collector based on the dust concentration, and calculate the proportion of normal dust chambers, and when the proportion is less than a preset proportion threshold, an alarm mechanism is triggered, and the alarm device is controlled to alarm according to the alarm mechanism. The proportion of normal dust chambers is the proportion of the number of dust chambers with less than the preset dust concentration threshold to the total number of dust chambers.

[0072] In some embodiments, the dust concentration can reflect the overall dust removal efficiency of the dust collector, thereby quantitatively and objectively evaluating the overall dust collector. The system 100 for detecting dust concentration can accurately monitor the dust concentration of each partition at the dust collector outlet to evaluate the dust removal efficiency and achieve status warning.

[0073] In some embodiments, a preset dust concentration threshold a is set for each dust chamber. When the smoke in each dust chamber is processed by the dust collector, if the dust collector operates well, the dust concentration will be lower than the threshold a. If the dust chamber processes the smoke abnormally, the dust concentration in the dust chamber will be higher than the threshold a. The ratio of the number of dust chambers with a dust concentration lower than the threshold a to the total number of dust chambers is calculated as the state detection of the dust collector, indicating the efficiency value of the dust collector dust chamber being able to remove dust normally.

[0074] When the proportion is less than the preset threshold, the alarm mechanism is triggered to remind the operator to find out the cause and take corresponding measures immediately, such as stopping production, identifying the abnormal dust collector dust chamber, cleaning the electrode or starting the dust collector backflush system, etc. The dust chamber fault can be checked in a targeted manner, and the problems such as dust wrapped in the electrode wire can be dealt with in a timely manner.

[0075] Among them, the preset dust concentration threshold and the preset ratio threshold can be determined according to the specific circumstances in the actual application scenario, and are not specifically limited here.

[0076] Please continue to see Figure 3 The system 100 for detecting dust concentration further includes a data processing and display unit 140. The data processing and display unit 140 is used to receive data from the control system 130, process the received data, and display the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers in real time, and store the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers within a preset time range.

[0077] In some embodiments, the data processing and display unit 140 processes the data of the control system 130 and displays it in real time, and can also optimize it to add a historical data storage function, and can store the dust concentration data of each dust chamber within a preset time range to facilitate trend analysis and troubleshooting.

[0078] Among them, the preset time range can be determined according to the specific circumstances in the actual application scenario and is not specifically limited here.

[0079] See also Figure 4 , Figure 4 Schematic diagram of the steps of the method for detecting dust concentration at the outlet of a coal-fired power plant dust collector provided in the embodiment of the present application. Figure 4 As shown, based on Figure 1 The system 100 for detecting dust concentration at the outlet of a coal-fired power plant dust collector shown in the figure may include the following steps: S401, based on the partitioned negative pressure supply sampling system 110, according to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is patrolled or sampled simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system 120; or, based on a single negative pressure, the flue gas of the corresponding partition is sampled to obtain a single flue gas sample, and based on a single negative pressure, the flue gas sample of the corresponding partition is driven to flow from the corresponding flue gas pipeline to the dust concentration detection system 120; each partition is a dust chamber for dust removal at the outlet of the dust collector.

[0080] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiment and will not be repeated here.

[0081] Combination Figure 2 and Figure 4 According to one embodiment of the present application, the partitioned negative pressure supply sampling system 110 includes: n dust sampling guns (111, 113~11i) and n negative pressure generating devices [112, 114~11(i+1)], and the dust concentration detection system 120 includes: a dust concentration detector 122 and a main pipe 124 of the dust collector. According to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples. Based on each or several negative pressures, the flue gas samples of the corresponding partitions are driven sequentially or simultaneously, and flow from the corresponding flue gas pipeline to the dust concentration detection system 120, which may include the following steps: Based on each negative pressure generating device [112, 114~11(i+1)], multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun (111, 113~11i). When a negative pressure generating device is in the start state, the other negative pressure devices are in the stop state.

[0082] Based on each dust sampling gun (111, 113~11i), according to each negative pressure, the flue gas in each dust chamber is sampled in a preset rotation order and a preset patrol cycle to obtain the corresponding flue gas sample. Based on each negative pressure generating device [112, 114~11(i+1)], the flue gas sample of the corresponding dust chamber is sucked according to each negative pressure, and each flue gas sample is driven in turn from the corresponding flue gas pipeline to the dust concentration detector 122.

[0083] In some embodiments, a fixed patrol cycle can be set according to a set order, and dust chamber patrol negative pressure extraction can be performed according to actual conditions, so as to traverse the dust chamber and draw dust chamber smoke into the main pipe 124 for measurement. The preset rotation sequence and the preset patrol cycle can be determined according to the specific situation in the actual application scenario, and are not specifically limited here.

[0084] Combination Figure 2 and Figure 4 According to an embodiment of the present application, according to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system 120, and the following steps may also be included: Based on each negative pressure generating device [112, 114~11(i+1)], multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun (111, 113~11i). Based on each dust sampling gun (111, 113~11i), the flue gas in each dust chamber is sampled simultaneously according to each negative pressure to obtain multiple flue gas samples. Based on each negative pressure generating device [112, 114~11(i+1)], the flue gas samples of the corresponding dust chamber are sucked simultaneously according to each negative pressure, and each flue gas sample is driven in turn from the corresponding flue gas pipeline to the dust concentration detector 122 to obtain a total flue gas sample.

[0085] Combination Figure 2 and Figure 4 According to an embodiment of the present application, according to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system 120, and the following steps may also be included: Based on the negative pressure generating devices corresponding to several dust chambers, multiple negative pressures are generated according to the corresponding start and stop states, and the negative pressures are transmitted to the connected dust sampling guns. Based on the several dust sampling guns, the smoke in the several dust chambers is sampled in turn or simultaneously according to the several negative pressures to obtain multiple smoke samples.

[0086] Based on the several negative pressure generating devices, the smoke samples of the corresponding dust chambers are sucked sequentially or simultaneously according to the several negative pressures, and the several smoke samples are driven sequentially or simultaneously to flow from the corresponding smoke pipelines to the dust concentration detector 122.

[0087] Combination Figure 2 and Figure 4According to an embodiment of the present application, sampling the flue gas of the corresponding partition based on a single negative pressure to obtain a single flue gas sample, and driving the flue gas sample of the corresponding partition based on the single negative pressure to flow from the corresponding flue gas pipeline to the dust concentration detection system 120, may include the following steps: Based on the negative pressure generating device corresponding to a dust chamber, a single negative pressure is generated according to the corresponding start and stop state, and the negative pressure is transmitted to the connected dust sampling gun. Based on the dust sampling gun, the smoke in the dust chamber is sampled according to the negative pressure to obtain the corresponding smoke sample. Based on the negative pressure generating device, the smoke sample is sucked according to the negative pressure, and the smoke sample is driven to flow from the corresponding smoke pipeline to the dust concentration detector 122.

[0088] S402 , based on the dust concentration detection system 120 , real-time detection of dust concentration in the received flue gas sample is performed, and the corresponding dust concentration detection result is transmitted to the control system 130 .

[0089] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiment and will not be repeated here.

[0090] S403, based on the control system 130, controls the partitioned negative pressure supply sampling system 110 to start and stop in sequence when each partition is sampled in rotation, or starts and stops at the same time when each partition is sampled at the same time, or starts and stops when a single partition is sampled, or starts and stops in sequence or at the same time when several partitions are sampled, and obtains the corresponding dust concentration detection results in real time.

[0091] It should be noted that steps S401 and S403 are executed in parallel. While sampling is being performed based on the partitioned negative pressure supply sampling system 110 , the partitioned negative pressure supply sampling system 110 is controlled based on the control system 130 .

[0092] Combination Figure 2~Figure 4 According to an embodiment of the present application, based on the control system 130, the partitioned negative pressure supply sampling system 110 is controlled to start and stop in sequence when each partition is rotated for sampling, including: based on the control system 130, the switches of each negative pressure generating device [112, 114~11(i+1)] are switched in sequence to control each negative pressure generating device [112, 114~11(i+1)] to start and stop in sequence when the dust sampling gun (111, 113~11i) is rotated for sampling in the corresponding dust chamber.

[0093] In some embodiments, the control system 130 controls the switch of the negative pressure generating device [112, 114~11(i+1)], controls the negative pressure generating devices [112, 114~11(i+1)] of different dust chambers, makes each negative pressure generating device [112, 114~11(i+1)] work in sequence, and sends the smoke of the corresponding partition into the main pipe 124, so as to form a patrolling partition smoke extraction.

[0094] Combination Figure 2~Figure 4 According to an embodiment of the present application, based on the control system 130, the partitioned negative pressure supply sampling system 110 is controlled to start and stop simultaneously when each partition is sampling simultaneously, including: based on the control system 130, the switches of each negative pressure generating device [112, 114~11(i+1)] are switched simultaneously to control each negative pressure generating device [112, 114~11(i+1)] to start and stop simultaneously when the dust sampling guns (111, 113~11i) are sampling simultaneously in the corresponding dust chambers.

[0095] Combination Figure 2~Figure 4 According to one embodiment of the present application, based on the control system 130, the partitioned negative pressure supply sampling system 110 is controlled to start and stop when sampling in a single partition, including: based on the control system 130, turning on the switch of a negative pressure generating device and turning off the switches of the remaining negative pressure generating devices, so that when the dust sampling gun is sampling in the corresponding dust chamber, the negative pressure generating device is controlled to start and the remaining negative pressure generating devices are controlled.

[0096] Combination Figure 2~Figure 4 According to an embodiment of the present application, based on the control system 130, the partitioned negative pressure supply sampling system 110 is controlled to start and stop in sequence or simultaneously when sampling certain partitions, including: switching the switches of certain negative pressure generating devices based on the control system 130, and turning off the switches of the remaining negative pressure generating devices, so that when the dust sampling gun is sampling in the corresponding dust chamber, the several negative pressure generating devices are controlled to start and stop in sequence or simultaneously, and the remaining negative pressure generating devices are controlled to stop.

[0097] Please continue to see Figure 3 According to an embodiment of the present application, the control system 130 includes: a data acquisition module 132, a data transmission module 134 and a control module 136. The method may also include the following steps: Based on the data collection module 132, the dust concentration and the start and stop state signals of the partitioned negative pressure supply sampling system 110 are collected. Based on the data transmission module 134, the dust concentration and the start and stop state signals are transmitted to the control module 136 in real time using wired or wireless communication technology.

[0098] Based on the control module 136, the dust concentration and start-stop status signals are received, processed and stored, and the partitioned negative pressure supply sampling system 110 is controlled to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled, and the dust concentration detection result is recorded while the partitioned negative pressure supply sampling system 110 is in the started state.

[0099] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiments and will not be repeated here.

[0100] According to one embodiment of the present application, the method may further include the following steps: Based on the control module 136, according to the abnormal detection logic, when an abnormal dust concentration detection result or equipment failure is detected, an alarm signal is triggered, and the alarm device is controlled to sound an alarm according to the alarm signal.

[0101] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiments and will not be repeated here.

[0102] According to one embodiment of the present application, the method may further include the following steps: Based on the control module 136, the overall dust removal efficiency of the dust collector is calculated according to the dust concentration, and the proportion of normal dust chambers is calculated. When the proportion is less than a preset ratio threshold, an alarm mechanism is triggered, and the alarm device is controlled to alarm according to the alarm mechanism. The proportion of normal dust chambers is: the proportion of the number of dust chambers with less than the preset dust concentration threshold to the total number of dust chambers.

[0103] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiments and will not be repeated here.

[0104] Please continue to see Figure 3 The system 100 for detecting dust concentration further includes a data processing and display unit 140. The method may further include the following steps: Based on the data processing and display unit 140 receiving data from the control system 130, the received data is processed, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of normal dust chambers are displayed in real time, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of normal dust chambers within a preset time range are stored.

[0105] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiments and will not be repeated here.

[0106] The embodiment of the present application provides a system 100 and method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partitions. The partitioned negative pressure supply sampling system 110 performs rounds or simultaneous sampling of the flue gas in the corresponding partitions based on each or several negative pressures, and drives the flue gas samples of the corresponding partitions to flow to the dust concentration detection system 120 in sequence or simultaneously based on each or several negative pressures; or, samples the flue gas in the corresponding partition based on a single negative pressure, and drives the flue gas samples of the corresponding partitions to flow to the detection system based on the single negative pressure; the dust concentration detection system 120 detects the dust concentration in the flue gas sample in real time; the control system 130 controls the sampling system to start and stop in sequence when sampling in each partition in rotation, or to start and stop simultaneously when sampling in each partition at the same time, or to start and stop when sampling in a single partition, or to start and stop in sequence or simultaneously when sampling in several partitions.

[0107] The present application scheme first samples the flue gas in each dust chamber through the zoned negative pressure supply sampling system 110 based on the control of the control system 130, and then detects the dust concentration through the dust concentration detection system 120. It can detect the dust concentration of each dust chamber in real time and accurately reflect the dust removal efficiency of each dust chamber in real time, provide a scientific basis for the operation and maintenance management of coal-fired power plants, and has strong ease of use and practicality.

[0108] In the present application, the zoned negative pressure supply sampling system 110 realizes zoned control of dust collection and management in multiple dust chambers by controlling the negative pressure state of each dust chamber. The system drives the smoke from each dust chamber into the main pipe 124 for detection through negative pressure extraction, and realizes real-time detection of dust concentration in conjunction with automated detection and control technology.

[0109] The present application provides a zoned patrol smoke measurement system, which extracts through a negative pressure generating device. There is no need to install a dust concentration detector 122 in each dust chamber, but the dust concentration in each dust chamber can still be detected, saving costs. In conjunction with the control system 130, the automated control has a higher efficiency and better effect.

[0110] This application scheme can realize accurate monitoring and real-time early warning of dust concentration in each dust chamber, providing strong support for the optimized operation and troubleshooting of dust collectors. At the same time, by quantitatively evaluating the dust removal efficiency, it provides a scientific basis for environmental protection management and energy conservation and emission reduction of coal-fired power plants.

[0111] In coal-fired power plants, the phenomenon of ammonia escape from denitrification is common, and the generation of ammonium bisulfate increases the viscosity of fly ash, resulting in serious dust wrapping of the electrode wires of the electrostatic precipitator. The dust wrapping of the electrode wires will reduce the effective area of ​​the electrode and reduce the intensity of the corona discharge, thereby affecting the dust removal efficiency and having a significant impact on the dust removal efficiency. This application scheme can accurately grasp the dust removal efficiency of each dust chamber, monitor and evaluate the dust removal effect in real time, and clean the dust collector in time to ensure that the dust collector can operate normally and achieve the expected dust removal effect.

[0112] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0113] Corresponding to the method of the above embodiment, Figure 5 1 is a schematic diagram of the structure of a device for detecting dust concentration at the outlet of a coal-fired power plant dust collector provided in an embodiment of the present application. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0114] Reference Figure 5 , the device comprises: The sampling unit 501 is used to supply the sampling system 110 based on the partition negative pressure, generate a single or multiple negative pressures according to the start and stop states of the sampling systems corresponding to each or several partitions, perform rounds or simultaneous sampling of the flue gas in the corresponding partitions based on each or several negative pressures to obtain multiple flue gas samples, and drive the flue gas samples in the corresponding partitions in sequence or simultaneously based on each or several negative pressures to flow from the corresponding flue gas pipeline to the dust concentration detection system 120; or, sample the flue gas in the corresponding partition based on a single negative pressure to obtain a single flue gas sample, and drive the flue gas samples in the corresponding partition based on a single negative pressure to flow from the corresponding flue gas pipeline to the dust concentration detection system 120; each partition is a dust chamber for dust removal at the outlet of the dust collector; The detection unit 502 is used to detect the dust concentration in the received flue gas sample in real time based on the dust concentration detection system 120, and transmit the corresponding dust concentration detection result to the control system 130; The control unit 503 is used to control the partitioned negative pressure supply sampling system 110 to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled, based on the control system 130, and to obtain the corresponding dust concentration detection results in real time.

[0115] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0116] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0117] Figure 6 Schematic diagram of the structure of the electronic device 6 provided in the embodiment of the present application. Figure 6 As shown, the electronic device 6 of this embodiment includes: at least one processor 601 ( Figure 6 Only one is shown in the figure), a memory 603, and a computer program 602 stored in the memory 603 and executable on at least one processor 601, and when the processor 601 executes the computer program 602, the steps in the above method embodiment are implemented.

[0118] The electronic device 6 may be a computing device such as a desktop computer, a notebook, a PDA, or a mobile phone. The electronic device 6 may include, but is not limited to, a processor 601 and a memory 603. Those skilled in the art will appreciate that Figure 6 It is only an example of the electronic device 6 and does not constitute a limitation on the electronic device 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, it may also include input and output devices, network access devices, etc.

[0119] The processor 601 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware photovoltaic modules, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0120] In some embodiments, the memory 603 may be an internal storage unit of the electronic device 6, such as a hard disk or memory of the electronic device 6. In other embodiments, the memory 603 may also be an external storage device of the electronic device 6, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital card (SecureDigital, SD), a flash card (Flash Card), etc. equipped on the electronic device 6. Further, the memory 603 may also include both an internal storage unit of the electronic device 6 and an external storage device. The memory 603 is used to store an operating system, an application program, a boot loader (Boot Loader), data, and other programs, such as program codes of a computer program, etc. The memory 603 may also be used to temporarily store data that has been output or is to be output.

[0121] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, when the present application implements all or part of the processes in the above-mentioned embodiment method, it can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps applied to the above-mentioned method embodiment. Among them, the computer program includes computer program code, which can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may at least include: any entity or device that can carry the computer program code to the computing device / electronic device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, such as USB flash drive, mobile hard disk, disk or optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable storage media cannot be electric carrier signals and telecommunication signals.

[0122] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0123] An embodiment of the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the steps in the above-mentioned method embodiments.

[0124] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0126] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. The device / electronic device embodiments described above are merely schematic, and the division of the above modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or photovoltaic components can be combined or integrated into another system, and some features can be ignored and not executed. Another point is that the indirect coupling, direct coupling or communication connection between each other shown or discussed can be an indirect coupling, direct coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0127] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A system for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partition, characterized in that: The system comprises: The partitioned negative pressure supply sampling system is used to generate a single or multiple negative pressures according to the start and stop status of the sampling system corresponding to each or several partitions, and to sample the flue gas of the corresponding partitions in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and to drive the flue gas samples of the corresponding partitions in sequence or simultaneously based on each or several negative pressures, so that they flow from the corresponding flue gas pipeline to the dust concentration detection system; Alternatively, based on a single negative pressure, the flue gas of the corresponding partition is sampled to obtain a single flue gas sample, and based on the single negative pressure, the flue gas sample of the corresponding partition is driven to flow from the corresponding flue gas pipeline to the dust concentration detection system; each partition is a dust chamber for dust removal at the outlet of the dust collector; The dust concentration detection system is used to detect the dust concentration in the received flue gas sample in real time and transmit the corresponding dust concentration detection results to the control system; A control system is used to control the partitioned negative pressure supply sampling system to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and to obtain the corresponding dust concentration detection results in real time.

2. The system for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 1 is characterized in that: The partitioned negative pressure supply sampling system includes: n dust sampling guns and n negative pressure generating devices, and the dust concentration detection system includes: a dust concentration detector and a main pipe of a dust collector; Each negative pressure generating device is connected to each dust chamber, each dust sampling gun is connected to each negative pressure generating device and then placed in each dust chamber, each negative pressure generating device is connected to the dust concentration detector through a corresponding flue gas pipeline, and the dust concentration detector is connected to the main pipe of the dust collector and the control system; Each negative pressure generating device is used to generate negative pressure, transmit the negative pressure to the connected dust sampling gun, suck the flue gas sample of the corresponding dust chamber based on the negative pressure, and drive each flue gas sample to flow from the corresponding flue gas pipeline to the dust concentration detector; Each dust sampling gun is used to sample the fume in the dust chamber based on the negative pressure generated by the connected negative pressure generating device to obtain a corresponding fume sample.

3. The system for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 1 is characterized in that: The control system includes: a data acquisition module, a data transmission module and a control module; The data acquisition module is used to collect dust concentration and start / stop status signals of the partitioned negative pressure supply sampling system; The data transmission module is used to transmit the dust concentration and the start / stop status signal to the control module in real time using wired or wireless communication technology; The control module is used to receive, process and store the dust concentration and the start-stop status signal, and control the partitioned negative pressure supply sampling system to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and to record the dust concentration detection result while the partitioned negative pressure supply sampling system is in the started state.

4. The system for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 3 is characterized in that: The control module is also used to trigger an alarm signal based on abnormal detection logic when an abnormal dust concentration detection result or equipment failure is detected, and control the alarm device to sound an alarm according to the alarm signal.

5. The system for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 3 or 4, characterized in that: The control module is also used to calculate the overall dust removal efficiency of the dust collector based on the dust concentration, and calculate the proportion of normal dust chambers. When the proportion is less than a preset proportion threshold, an alarm mechanism is triggered, and the alarm device is controlled to alarm according to the alarm mechanism; Among them, the proportion of normal dust chambers is the proportion of the number of dust chambers with dust concentration less than the preset dust concentration threshold to the total number of dust chambers.

6. The system for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 5 is characterized in that: The system for detecting dust concentration also includes a data processing and display unit; The data processing and display unit is used to receive data from the control system, process the received data, and display the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers in real time, and store the dust concentration, the overall dust removal efficiency of the dust collector, and the proportion of normal dust chambers within a preset time range.

7. A method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partition, characterized in that: A system for detecting dust concentration at the outlet of a coal-fired power plant dust collector based on any one of claims 1 to 6, the method comprising: Based on the partitioned negative pressure supply sampling system, a single or multiple negative pressures are generated according to the start and stop status of the sampling system corresponding to each or several partitions, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system; Alternatively, based on a single negative pressure, the flue gas of the corresponding partition is sampled to obtain a single flue gas sample, and based on the single negative pressure, the flue gas sample of the corresponding partition is driven to flow from the corresponding flue gas pipeline to the dust concentration detection system; each partition is a dust chamber for dust removal at the outlet of the dust collector; Based on the dust concentration detection system, the dust concentration in the received flue gas sample is detected in real time, and the corresponding dust concentration detection results are transmitted to the control system; Based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when each partition is sampled in rotation, or to start and stop at the same time when each partition is sampled at the same time, or to start and stop when a single partition is sampled, or to start and stop in sequence or at the same time when several partitions are sampled, and the corresponding dust concentration detection results are obtained in real time.

8. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 7, characterized in that: The partitioned negative pressure supply sampling system includes: n dust sampling guns and n negative pressure generating devices, and the dust concentration detection system includes: a dust concentration detector and a main pipe of a dust collector; according to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system, including: Based on each negative pressure generating device, multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun; when a negative pressure generating device is in the start state, the other negative pressure devices are in the stop state; Based on each dust sampling gun, according to each negative pressure, the flue gas in each dust chamber is sampled in a preset rotation order and a preset patrol cycle to obtain the corresponding flue gas sample; Each negative pressure generating device sucks the flue gas sample of the corresponding dust chamber according to each negative pressure, and drives each flue gas sample to flow from the corresponding flue gas pipeline to the dust concentration detector in turn.

9. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: According to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system, and also includes: Based on each negative pressure generating device, multiple negative pressures are generated according to the corresponding start and stop states, and each negative pressure is transmitted to the connected dust sampling gun; Based on each dust sampling gun, the smoke in each dust chamber is sampled simultaneously according to each negative pressure to obtain multiple smoke samples; Based on each negative pressure generating device, the smoke sample of the corresponding dust chamber is sucked simultaneously according to each negative pressure, and each smoke sample is driven in turn from the corresponding smoke pipeline to the dust concentration detector to obtain a total smoke sample.

10. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: According to the start and stop status of the sampling system corresponding to each or several partitions, a single or multiple negative pressures are generated, and the flue gas of the corresponding partitions is sampled in turn or simultaneously based on each or several negative pressures to obtain multiple flue gas samples, and the flue gas samples of the corresponding partitions are driven sequentially or simultaneously based on each or several negative pressures, and flow from the corresponding flue gas pipeline to the dust concentration detection system, and also includes: Based on the negative pressure generating devices corresponding to certain dust chambers, multiple negative pressures are generated according to the corresponding start and stop states, and the negative pressures are transmitted to the connected dust sampling guns; Based on the several dust sampling guns, the smoke in the several dust chambers is sampled in turn or simultaneously according to the several negative pressures to obtain multiple smoke samples; Based on the several negative pressure generating devices, the smoke samples of the corresponding dust chambers are sucked sequentially or simultaneously according to the several negative pressures, and the several smoke samples are driven sequentially or simultaneously to flow from the corresponding smoke pipelines to the dust concentration detector.

11. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: Sampling the flue gas of the corresponding partition based on a single negative pressure to obtain a single flue gas sample, and driving the flue gas sample of the corresponding partition based on the single negative pressure to flow from the corresponding flue gas pipeline to the dust concentration detection system, including: Based on the negative pressure generating device corresponding to a dust chamber, a single negative pressure is generated according to the corresponding start and stop state, and the negative pressure is transmitted to the connected dust sampling gun; Based on the dust sampling gun, the smoke in the dust chamber is sampled according to the negative pressure to obtain a corresponding smoke sample; Based on the negative pressure generating device, the flue gas sample is sucked according to the negative pressure, and the flue gas sample is driven to flow from the corresponding flue gas pipeline to the dust concentration detector.

12. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: Based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when sampling in each partition in rotation, including: Based on the control system, the switches of the negative pressure generating devices are switched in sequence to control the negative pressure generating devices to start and stop in sequence when the dust sampling guns are rotated to take samples in the corresponding dust chambers.

13. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: Based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop simultaneously when each partition is sampled simultaneously, including: Based on the control system, the switches of the negative pressure generating devices are switched simultaneously to control the negative pressure generating devices to start and stop simultaneously when the dust sampling guns are sampling in the corresponding dust chambers at the same time.

14. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: Based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop when sampling a single partition, including: Based on the control system, a switch of a certain negative pressure generating device is turned on, and the switches of the other negative pressure generating devices are turned off, so that when the dust sampling gun is sampling in the corresponding dust chamber, the negative pressure generating device is controlled to start, and the other negative pressure generating devices are controlled to stop.

15. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 8, characterized in that: Based on the control system, the partitioned negative pressure supply sampling system is controlled to start and stop in sequence or simultaneously when sampling in certain partitions, including: Based on the control system, switches of some negative pressure generating devices are switched and switches of other negative pressure generating devices are turned off, so that when the dust sampling gun is sampling in the corresponding dust chamber, the several negative pressure generating devices are controlled to start and stop in sequence or simultaneously, and the other negative pressure generating devices are controlled to stop.

16. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partition according to any one of claims 7 to 15, characterized in that: The control system includes: a data acquisition module, a data transmission module and a control module; the method also includes: Based on the data acquisition module, dust concentration and start / stop status signals of the partitioned negative pressure supply sampling system are collected; Based on the data transmission module, the dust concentration and the start / stop status signal are transmitted to the control module in real time using wired or wireless communication technology; Based on the control module, the dust concentration and the start-stop status signal are received, processed and stored, and the partitioned negative pressure supply sampling system is controlled to start and stop in sequence when each partition is sampled in rotation, or to start and stop simultaneously when each partition is sampled simultaneously, or to start and stop when a single partition is sampled, or to start and stop in sequence or simultaneously when several partitions are sampled, and the dust concentration detection result is recorded while the partitioned negative pressure supply sampling system is in the started state.

17. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 16, characterized in that: The method further comprises: Based on the control module, according to the abnormality detection logic, when it is detected that the dust concentration detection result is abnormal or the equipment fails, an alarm signal is triggered, and the alarm device is controlled to alarm according to the alarm signal.

18. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 16, characterized in that: The method further comprises: Based on the control module, the overall dust removal efficiency of the dust collector is calculated according to the dust concentration, and the proportion of the normal dust chamber is calculated. When the proportion is less than a preset proportion threshold, an alarm mechanism is triggered, and the alarm device is controlled to alarm according to the alarm mechanism; Among them, the proportion of normal dust chambers is: the proportion of the number of dust chambers with dust concentration less than the preset dust concentration threshold to the total number of dust chambers.

19. The method for detecting dust concentration at the outlet of a coal-fired power plant dust collector according to claim 18, characterized in that: The system for detecting dust concentration further includes a data processing and display unit; the method further includes: Based on the data processing and display unit receiving data from the control system, the received data is processed, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of normal dust chambers are displayed in real time, and the dust concentration, the overall dust removal efficiency of the dust collector and the proportion of normal dust chambers within a preset time range are stored.

20. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partitioning as described in any one of claims 7 to 19 is implemented.

21. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for detecting dust concentration at the outlet of a coal-fired power plant dust collector by partitioning as described in any one of claims 7 to 19 is implemented.

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