CN101261198A - Coal-fired generating set desulfurization real-time on-line monitoring system power plant substation monitoring method - Google Patents
Coal-fired generating set desulfurization real-time on-line monitoring system power plant substation monitoring method Download PDFInfo
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 124
- 230000023556 desulfurization Effects 0.000 title claims abstract description 124
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000003546 flue gas Substances 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000010977 unit operation Methods 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 18
- 230000007613 environmental effect Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
燃煤发电机组脱硫实时在线监测系统电厂子站监测方法属于电力系统自动化控制技术领域，其特征在于在第k个采样间隔后，采集了燃煤发电机组的原烟气硫含量、净烟气硫含量等多个脱硫设施关键数据；同时还采集了增压风机功率、浆液泵运行状态、旁路挡板门运行状态等多个关键设备的数据，从而更加准确的掌握脱硫设施的实际运行状态；另外本发明通过算法计算出机组实际通过脱硫设施进行脱硫处理的烟气率；同时结合旁路挡板门运行状态、增压风机的运行状态等其他相关参数，得出脱硫设施真正的日投运率以及脱硫设施的投运状态。本发明可以实用于我国各大区域和省级电网的燃煤发电机组脱硫实时在线监测系统，提高监测的可靠性和有效性。
The coal-fired generating set desulfurization real-time on-line monitoring system power plant substation monitoring method belongs to the field of electric power system automation control technology, and is characterized in that after the kth sampling interval, the raw flue gas sulfur content and the net flue gas sulfur content of the coal-fired generating set are collected. At the same time, the data of multiple key equipment such as booster fan power, slurry pump operation status, bypass baffle door operation status, etc. are collected, so as to more accurately grasp the actual operation status of desulfurization facilities; In addition, the present invention calculates the flue gas rate that the unit actually performs desulfurization treatment through the desulfurization facility through an algorithm; at the same time, combined with other relevant parameters such as the operation state of the bypass baffle door and the operation state of the booster fan, the real daily operation of the desulfurization facility is obtained rate and the operational status of desulfurization facilities. The invention can be practically used in real-time on-line monitoring systems for desulfurization of coal-fired generating sets in major regions and provincial power grids in my country, thereby improving the reliability and effectiveness of monitoring.
Description
技术领域 technical field
本技术发明属于电力系统省级电网和区域大电网中的燃煤发电机组脱硫实时在线监测系统电厂子站监测方法。The technical invention belongs to a power plant substation monitoring method of a real-time on-line monitoring system for desulfurization of a coal-fired generating set in a provincial power grid of a power system and a large regional power grid.
背景技术 Background technique
二氧化硫排放是造成我国大气环境污染及酸雨不断加剧的主要原因。燃煤机组所排放的烟气已成为二氧化硫排放的重要来源。我国大中型燃煤发电机组为适应环保要求，减排二氧化硫，在烟道中安装了造价高昂的烟气脱硫设施；但是由于脱硫设施设备运行复杂、运行成本和维护难度都比较高，因此脱硫设施的实际运行状况并不理想。针对目前脱硫设施运行的实际现状，国家发展改革委和国家环保总局联合会下发了《燃煤发电机组脱硫电价及脱硫设施运行管理办法(试行)》，要求发电企业安装的烟气脱硫设施必须达到环保要求，并安装烟气自动在线监测系统，由省级环保部门和省级电网企业负责实时监测。Sulfur dioxide emission is the main cause of air pollution and acid rain in my country. The flue gas emitted by coal-fired units has become an important source of sulfur dioxide emissions. In order to meet the requirements of environmental protection and reduce sulfur dioxide emissions, my country's large and medium-sized coal-fired generating units have installed expensive flue gas desulfurization facilities in the flue; Actual performance is not ideal. In view of the actual status of the current desulfurization facilities, the National Development and Reform Commission and the State Environmental Protection Administration have issued the "Coal-fired Power Generation Unit Desulfurization Price and Desulfurization Facilities Operation Management Measures (Trial)", requiring power generation companies to install flue gas desulfurization facilities must be Meet environmental protection requirements, and install an automatic online monitoring system for flue gas, and the provincial environmental protection department and provincial power grid enterprises are responsible for real-time monitoring.
正是在这样的背景下，本发明将新的脱硫监测方法引入电力系统，提出了燃煤发电机组脱硫实时在线监测系统子站监控方法，实现对燃煤发电机组的脱硫实时在线准确监测。It is against this background that the present invention introduces a new desulfurization monitoring method into the power system, and proposes a real-time on-line desulfurization monitoring system substation monitoring method for coal-fired generating units to realize real-time online and accurate monitoring of desulfurization of coal-fired generating units.
发明内容 Contents of the invention
本发明的目的在于提供一种燃煤发电机组脱硫实时在线监测系统电厂子站监测方法。The object of the present invention is to provide a monitoring method for a substation of a power plant in a real-time on-line monitoring system for desulfurization of a coal-fired generating set.
本发明的特征在于，该方法在燃煤发电机组脱硫实时在线监测系统电厂子站调控计算机依次按照以下步骤实现的：The present invention is characterized in that the method is implemented in the control computer of the power plant substation of the desulfurization real-time on-line monitoring system of the coal-fired generating set according to the following steps:
步骤(1)：初始化Step (1): Initialization
给定：燃煤发电机组脱硫系统增压风机的三相电流、三相电压和有功功率的实时量测值；增压风机出口烟气流量的实时量测值；发电厂锅炉一次和二次送风流量总和的量测值；原烟气SO2浓度的量测值；烟囱出口净烟气的SO2浓度的量测值；旁路挡板门开度信号的量测值；发电机组的有功功率和无功功率；脱硫装置投/退信号；脱硫系统用料投/退信号；循环浆液泵运行/停止信号；机组脱硫入口CEMS启/停信号；机组烟囱入口CEMS启/停信号；机组运行/停止状态信号；Given: The real-time measurement values of the three-phase current, three-phase voltage and active power of the booster fan of the desulfurization system of the coal-fired generating set; the real-time measurement value of the flue gas flow at the outlet of the booster fan; The measured value of the sum of the wind flow; the measured value of the SO2 concentration of the original flue gas; the measured value of the SO2 concentration of the net flue gas at the chimney outlet; the measured value of the bypass baffle door opening signal; the active power of the generator set and reactive power; desulfurization device input/return signal; desulfurization system material input/return signal; circulating slurry pump operation/stop signal; unit desulfurization inlet CEMS start/stop signal; unit chimney inlet CEMS start/stop signal; unit operation/ stop state signal;
设定：燃煤发电机组脱硫实时在线监测系统的采样间隔时间为T采样；Setting: The sampling interval of the desulfurization real-time on-line monitoring system of coal-fired generating units is T sampling ;
步骤(2)：在当前时刻，以每日的零点作为起始时间，第k个采样间隔后，根据给定的燃煤发电机组脱硫系统的各种实时量测值和信号，进行以下的计算：Step (2): At the current moment, with the zero point of each day as the starting time, after the kth sampling interval, perform the following calculations according to various real-time measured values and signals of the desulfurization system of the given coal-fired generating set :
①燃煤发电机组脱硫系统实时脱硫效率计算和进行脱硫的实时烟气率计算：① Calculation of real-time desulfurization efficiency of coal-fired generating set desulfurization system and calculation of real-time flue gas rate for desulfurization:
根据给定的原烟气SO2浓度的量测值和烟囱出口净烟气的SO2浓度的量测值，进行以下的计算：According to the measured value of the SO2 concentration of the given original flue gas and the measured value of the SO2 concentration of the net flue gas at the chimney outlet, the following calculations are performed:
根据给定的增压风机出口烟气流量的实时量测值、发电厂锅炉一次和二次送风流量总和的量测值，进行以下的计算：According to the real-time measured value of the flue gas flow at the outlet of the given booster fan and the measured value of the sum of the primary and secondary air supply flow of the boiler in the power plant, the following calculations are performed:
②脱硫设施日投运时间和发电机组日运行时间计算：② Calculation of daily operation time of desulfurization facilities and daily operation time of generating units:
根据给定的机组脱硫入口CEMS启/停信号、机组烟囱入口CEMS启/停信号和机组运行/停止状态信号，设定以下的等式：According to the given CEMS start/stop signal at the desulfurization inlet of the unit, the CEMS start/stop signal at the chimney inlet of the unit and the running/stop status signal of the unit, the following equations are set:
T脱硫[k]＝第k个采样间隔后脱硫设施日投运时间，T desulfurization [k] = daily operation time of desulfurization facilities after the kth sampling interval,
T脱硫[k]＝T脱硫[k-1]+T采样×A×B，T desulfurization [k] = T desulfurization [k-1] + T sampling × A × B,
T机组[k]＝第k个采样间隔后机组日运行时间，T unit [k] = daily running time of the unit after the kth sampling interval,
T机组[k]＝T机组[k-1]+T采样×C，T unit [k] = T unit [k-1] + T sampling × C,
③脱硫设施日运行投运率计算：③Calculation of daily operation rate of desulfurization facilities:
④脱硫设施日运行有效投运率计算：④Calculation of effective daily operation rate of desulfurization facilities:
根据上式计算的脱硫设施脱硫效率，设定以下的等式：According to the desulfurization efficiency of the desulfurization facility calculated by the above formula, the following equation is set:
T脱硫有效[k]＝第k个采样间隔后脱硫设施有效日投运时间，T desulfurization effective [k] = desulfurization facility effective daily operation time after the kth sampling interval,
T脱硫有效[k]＝T脱硫有效[k-1]+T采样×A×B×D，T desulfurization effective [k] = T desulfurization effective [k-1] + T sampling × A × B × D,
步骤(3)：根据步骤(2)所计算得到的各种结果以及系统给定的各种信号，分析脱硫设施的投运状态：Step (3): According to various results calculated in step (2) and various signals given by the system, analyze the operation status of desulfurization facilities:
①脱硫设施正常投运状态的判断条件，必须同时全部满足以下条件方可判断脱硫设施正常投运状态：① The conditions for judging the normal operation status of desulfurization facilities must meet the following conditions at the same time to judge the normal operation status of desulfurization facilities:
a.脱硫系统实时脱硫效率[k]≥60％；a. The real-time desulfurization efficiency of the desulfurization system [k]≥60%;
b.进行脱硫的实时烟气率[k]≥40％；b. The real-time flue gas rate [k] for desulfurization is ≥ 40%;
c.烟气旁路挡板门开度≤30％；c. The opening of the flue gas bypass baffle door is ≤30%;
d.有一台或多台循环浆液泵处于运行中；d. One or more circulating slurry pumps are in operation;
e.增压风机有功功率≥800kW；e. The active power of booster fan is ≥800kW;
②当机组运行/停止状态信号给出的是运行信号时，脱硫设施故障状态的判断条件，只要以下条件满足其中任何一条即可判断脱硫设施故障状态：② When the unit running/stop status signal gives the running signal, the judgment conditions of the desulfurization facility failure status can be judged as long as any of the following conditions are met:
a. 脱硫系统实时脱硫效率[k]＜50％；a. The real-time desulfurization efficiency of the desulfurization system [k]<50%;
b.进行脱硫的实时烟气率[k]＜30％；b. The real-time flue gas rate [k] for desulfurization < 30%;
c.烟气旁路挡板门开度＞80％；c. The opening of the flue gas bypass baffle door > 80%;
d.循环浆液泵全部处于停运状态；d. The circulating slurry pumps are all out of service;
e.增压风机运行功率≤100kW；e. The operating power of the booster fan is ≤100kW;
③脱硫设施停运状态的判断条件，必须同时全部满足以下条件方可判断脱硫设施停运状态：③The conditions for judging the outage status of desulfurization facilities must meet all of the following conditions at the same time before judging the outage status of desulfurization facilities:
a.循环浆液泵全部处于停运状态；a. The circulating slurry pumps are all out of service;
b.增压风机运行功率≤50kW；b. The operating power of the booster fan is ≤50kW;
c.增压风机出口烟气流量≤50M3/Sc. Flue gas flow at the outlet of the booster fan ≤ 50M 3 /S
步骤(4)：把步骤(2)和步骤(3)中得到的各数值进行输出。Step (4): Output the values obtained in step (2) and step (3).
本发明根据电力系统中燃煤发电机组脱硫系统的特点，将新的脱硫监测方法引入电力系统，提出了燃煤发电机组脱硫实时在线监测系统电厂子站监测方法。本发明采集多个脱硫设施关键数据，能够更加准确的掌握脱硫设施的实际运行状态。具体而言，有以下优点：According to the characteristics of the desulfurization system of the coal-fired generating set in the power system, the invention introduces a new desulfurization monitoring method into the power system, and proposes a real-time on-line monitoring method for the desulfurization of the coal-fired generating set. The invention collects key data of multiple desulfurization facilities, and can more accurately grasp the actual operation status of the desulfurization facilities. Specifically, there are the following advantages:
1)本发明提出的监测方法采集了燃煤发电机组的脱硫效率、原烟气硫含量、净烟气硫含量等多个脱硫设施关键数据；同时本方法还采集了增压风机功率、浆液泵运行状态、旁路挡板门运行状态等多个反映脱硫设施运行真实状态的关键设备的数据，从而更加准确的掌握脱硫设施的实际运行状态；1) The monitoring method proposed by the present invention collects the key data of multiple desulfurization facilities such as the desulfurization efficiency of the coal-fired generating set, the sulfur content of the original flue gas, and the sulfur content of the net flue gas; Operation status, bypass baffle door operation status and other key equipment data that reflect the real operation status of desulfurization facilities, so as to more accurately grasp the actual operation status of desulfurization facilities;
2)本发明提出的监测方法同时采集机组一二次风流量和脱硫设施中的增压风机出口烟气流量这两个关键参数，通过算法计算出机组实际通过脱硫设施进行脱硫处理的烟气率；2) The monitoring method proposed by the present invention simultaneously collects two key parameters, the primary and secondary air flow of the unit and the flue gas flow at the outlet of the booster fan in the desulfurization facility, and calculates the actual flue gas rate of the unit through the desulfurization facility for desulfurization treatment through an algorithm ;
3)本发明提出的监测方法结合旁路挡板门运行状态、增压风机的运行状态等其他相关参数，从而得出脱硫设施真正的日投运率以及脱硫设施的投运状态；3) The monitoring method proposed by the present invention combines other relevant parameters such as the operating state of the bypass baffle door and the operating state of the booster fan, so as to obtain the real daily commissioning rate of the desulfurization facility and the commissioning state of the desulfurization facility;
本发明提出的燃煤发电机组脱硫实时在线监测子站监测方法可以实用于我国各大区域和省级电力系统的燃煤发电机组脱硫实时在线监测系统之中，并产生重大的经济和社会效益。The coal-fired generating set desulfurization real-time on-line monitoring sub-station monitoring method proposed by the present invention can be practically used in coal-fired generating set desulfurization real-time on-line monitoring systems in various regional and provincial power systems in my country, and produces significant economic and social benefits.
附图说明 Description of drawings
图1.本发明所述方法的硬件平台。Figure 1. The hardware platform of the method of the present invention.
图2.本发明所述方法的程序流程框图。Fig. 2. A program flow diagram of the method of the present invention.
具体实施方式 Detailed ways
本发明采集多个脱硫设施关键数据，将新的脱硫监测方法引入电力系统，提出了燃煤发电机组脱硫实时在线监测子站监控方法(如图1所示)，并且可以通过计算机进行自动监测。The present invention collects key data of multiple desulfurization facilities, introduces a new desulfurization monitoring method into the power system, and proposes a real-time on-line desulfurization monitoring substation monitoring method for coal-fired generating units (as shown in Figure 1), which can be automatically monitored by a computer.
该发明包含以下的步骤(流程参见图2)：This invention comprises following steps (flow process is referring to Fig. 2):
步骤1：在离线状态下，设定燃煤发电机组脱硫实时在线监测系统的采样间隔时间T采样；Step 1: In the offline state, set the sampling interval time T sampling of the desulfurization real-time online monitoring system of the coal-fired generating set;
步骤2：给定燃煤发电机组脱硫系统增压风机的三相电流、三相电压和有功功率的实时量测值；增压风机出口烟气流量的实时量测值；发电厂锅炉一次和二次送风流量总和的量测值；原烟气SO2浓度的量测值；烟囱出口净烟气的SO2浓度的量测值；旁路挡板门开度信号的量测值；发电机组的有功功率和无功功率；脱硫装置投/退信号；脱硫系统用料投/退信号；循环浆液泵运行/停止信号；机组脱硫入口CEMS启/停信号；机组烟囱入口CEMS启/停信号；机组运行/停止状态信号；Step 2: Given the real-time measurement values of the three-phase current, three-phase voltage and active power of the booster fan of the desulfurization system of the coal-fired generating set; the real-time measurement value of the flue gas flow at the outlet of the booster fan; The measured value of the sum of the secondary air supply flow; the measured value of the SO2 concentration of the original flue gas; the measured value of the SO2 concentration of the net flue gas at the chimney outlet; the measured value of the opening signal of the bypass baffle door; the measured value of the generator set Active power and reactive power; desulfurization device input/return signal; desulfurization system material input/return signal; circulating slurry pump operation/stop signal; unit desulfurization inlet CEMS start/stop signal; unit chimney inlet CEMS start/stop signal; unit Run/stop status signal;
步骤3：根据给定的燃煤发电机组脱硫系统的各种实时量测值和信号，计算燃煤发电机组脱硫系统实时脱硫效率和进行脱硫的实时烟气率：Step 3: Calculate the real-time desulfurization efficiency of the desulfurization system of the coal-fired power unit and the real-time flue gas rate for desulfurization according to various real-time measured values and signals of the desulfurization system of the given coal-fired power unit:
步骤4：根据给定的机组脱硫入口CEMS启/停信号、机组烟囱入口CEMS启/停信号和机组运行/停止状态信号，计算发电机组脱硫设施日投运时间、发电机组日运行时间Step 4: According to the given CEMS start/stop signal at the desulfurization inlet of the unit, the CEMS start/stop signal at the chimney inlet of the unit and the running/stop status signal of the unit, calculate the daily operation time of the desulfurization facility of the generating unit and the daily operating time of the generating unit
步骤5：根据步骤3和步骤4计算的结果，计算脱硫设施日运行投运率脱硫设施和日运行有效投运率；Step 5: According to the calculation results of steps 3 and 4, calculate the desulfurization facility daily operation rate desulfurization facilities and daily operation effective operation rate;
步骤6：根据以上步骤所计算得到的各种结果以及系统给定的各种信号，分析计算脱硫设施的投运状态；Step 6: According to the various results calculated in the above steps and various signals given by the system, analyze and calculate the operation status of the desulfurization facilities;
步骤7：把步骤3到步骤6中所计算得到的各种数据作为输出数据进行输出。Step 7: Output the various data calculated in steps 3 to 6 as output data.
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