CN210740365U - Coal-fired power plant boiler monitoring system - Google Patents
Coal-fired power plant boiler monitoring system Download PDFInfo
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- CN210740365U CN210740365U CN201920983001.0U CN201920983001U CN210740365U CN 210740365 U CN210740365 U CN 210740365U CN 201920983001 U CN201920983001 U CN 201920983001U CN 210740365 U CN210740365 U CN 210740365U
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Abstract
The utility model discloses a coal-fired power plant boiler monitoring system, which relates to the technical field of main equipment of thermal generator sets, and comprises a coal mill (1), a raw coal sampling device (2), a raw coal bunker (3), a boiler combustion chamber (4), a boiler slag discharge sampling device (5), a slag temperature measuring meter (6), an air preheater (7), a smoke discharge temperature measuring device (8), a flue gas component analysis device (9), a fly ash sampling device (10), a dust remover (11), a primary air fan (12), an air feeder (13), an environmental temperature measuring meter (14) and a boiler main steam flow collecting device (15); the utility model provides a pair of coal fired power plant boiler monitoring system, convenient effectual monitoring data for calculating the thermal efficiency and calculating and provide the data support, improve the accuracy nature that the power supply coal consumed the calculation.
Description
Technical Field
The utility model belongs to the technical field of thermal generator set main equipment, especially, relate to a coal fired power plant boiler monitoring system.
Background
The new energy power generation such as wind power generation, photovoltaic power generation, biomass power generation and the like has the advantages of cleanness, little pollutant emission, regeneration and the like which are incomparable with stone energy power generation, the installed capacity of a domestic new energy power generating set is rapidly increased in recent years, the proportion of the generated energy of the new energy is also rapidly increased, but the current coal-fired power generation still occupies the leading position in China. The installed capacity of coal electricity in China reaches 10.1 billion KW by 2018, the total annual coal electricity generation amount is 4.92 trillion kw.h, coal consumption is up to 15 billion tons every year, and huge pressure is brought to the ecological environment.
Through technical transformation, the energy consumption and pollutant emission indexes of the coal-fired power generating units are reduced year by year in recent years, and the average power supply coal consumption of the coal-fired units with the power of more than 600MW in the whole country is reduced to 308g/kw.h in 2018. The ministry of environmental protection, the development and improvement committee and the energy agency jointly issue a working scheme of comprehensively implementing ultra-low emission and energy-saving improvement of coal-fired power plants (environmental development 2015) 164), and the ultra-low emission and energy-saving improvement of the coal-fired power plants is promoted to be a special action of the country, and all the coal-fired power plants with the improvement conditions in the whole country in 2020 are required to strive to realize the ultra-low emission. The power dispatching department can monitor the coal consumption and emission index of the coal-fired unit in real time through the energy-saving dispatching system, and realize the real-time energy-saving dispatching of the coal-fired unit. The measurement of the flue gas temperature preheated by the air preheater and the contents of O2, CO and CO2 in the flue gas sometimes brings errors to the calculation of the heat efficiency of the boiler due to poor representativeness of the installation position of a sampling point, and influences the accuracy of the calculation of the power supply coal consumption.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a coal fired power plant boiler monitoring system, monitoring coal fired power plant boiler's concrete data, for calculating the thermal efficiency and calculating and provide the data support, in order to solve above-mentioned problem, the utility model provides a coal fired power plant boiler monitoring system. The specific technical scheme is as follows:
a coal-fired power plant boiler monitoring system, the said coal-fired power plant boiler includes coal pulverizer, raw coal bunker, boiler combustion chamber, air preheater, dust remover, primary air blower, a coal-fired power plant boiler monitoring system includes raw coal sampling device, boiler slag discharge sampling device, slag temperature measuring meter, gas temperature measuring device, gas composition analytical equipment, fly ash sampling device, ambient temperature measuring meter, boiler main steam flow acquisition device;
a raw coal sampling device is arranged above the coal mill, the upper end of the raw coal sampling device is communicated with a raw coal bin, the boiler slag discharge sampling device and a slag temperature measuring meter are arranged at a slag discharge port of a boiler combustion chamber, the air preheater is arranged in a vertical flue of the boiler combustion chamber, the smoke discharge temperature measuring device, the smoke component analyzing device and the fly ash sampling device are arranged on a measuring hole of the vertical flue of the air preheater, and the environment temperature measuring meter is arranged near an inlet of the air blower;
the raw coal sampling device is used for sampling raw coal before being ground by the coal mill; the boiler slag discharging and sampling device is used for sampling slag after combustion in a boiler combustion chamber; the furnace slag temperature measuring meter is used for measuring the slag discharging temperature of the hearth; the air preheater preheats air before entering the boiler combustion chamber by using flue gas; the smoke exhaust temperature measuring device is used for measuring the smoke temperature behind the air preheater; the flue gas component analysis device is used for analyzing the contents of O2, CO and CO2 in the flue gas after the air preheater; the fly ash sampling device is used for extracting fly ash after the air preheater; the environment temperature measuring meter is used for detecting the environment temperature near the inlet of the air feeder, and the main steam flow collecting device of the boiler is used for collecting the actual evaporation capacity during the thermal efficiency test of the boiler.
Further, the raw coal sampling device comprises a sampling tube.
Further, the exhaust smoke temperature measuring device comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measuring hole of a vertical flue behind the air preheater, and the ARC-MET8000 type data acquisition system is used for acquiring measured data of the K-type thermocouple.
Further, the fly ash sampling device comprises a sampling hole arranged in a vertical flue of the air preheater and a fly ash constant-speed sampling gun.
Further, the environment temperature measuring meter comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measuring hole of a vertical flue behind the air preheater, and the ARC-MET8000 type data acquisition system is used for acquiring measured data of the K-type thermocouple.
The utility model discloses beneficial effect does:
the coal-fired power plant boiler monitoring system provided by the invention can conveniently and effectively monitor data, provide data support for calculating the thermal efficiency and improve the accuracy of power supply coal consumption calculation.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a coal-fired utility boiler monitoring system.
Wherein: 1, a coal mill; 2, a raw coal sampling device; 3, raw coal bunker; 4, a boiler combustion chamber; 5, a boiler slag discharging and sampling device; 6, measuring the slag temperature by a meter; 7, an air preheater; a smoke exhaust temperature measuring device; 9, a smoke component analysis device; 10 fly ash sampling device; 11, a dust remover; 12, a primary air fan; 13, a blower; an ambient temperature measuring meter; 15, a boiler main steam flow collecting device.
Detailed Description
The drawings in the embodiments of the present invention are combined below; the technical scheme of the implementation is clearly and completely described; it is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a coal-fired utility boiler monitoring system, coal-fired utility boiler include coal pulverizer 1, raw coal bunker 3, boiler combustion chamber 4, air heater 7, dust remover 11, primary air fan 12, forced draught blower 13; a coal-fired power plant boiler monitoring system comprises a raw coal sampling device 2, a boiler slag discharge sampling device 5, a slag temperature measuring meter 6, a smoke temperature measuring device 8, a smoke component analyzing device 9, a fly ash sampling device 10, an environment temperature measuring meter 14 and a boiler main steam flow collecting device 15;
a raw coal sampling device 2 is arranged above a coal mill 1, the upper end of the raw coal sampling device 2 is communicated with a raw coal bin 3, an outlet powder pipe of the coal mill 1 is connected with a boiler combustion chamber 4, a boiler slag discharge sampling device 5 and a slag temperature measuring meter 6 are arranged at a slag discharge port of the boiler combustion chamber 4, an air preheater 7 is arranged in a vertical flue of the boiler combustion chamber 4, a smoke discharge temperature measuring device 8, a smoke component analysis device 9 and a fly ash sampling device 10 are arranged on a measuring hole of the vertical flue behind the air preheater 7, a dust remover 11 is arranged at an outlet of the vertical flue port, and an environment temperature measuring meter 14 is arranged near an inlet of a blower 13;
the coal mill 1 is used for grinding raw coal, and the raw coal sampling device 2 is used for sampling the raw coal before the grinding by the coal mill 1; the raw coal bin 3 is used for storing raw coal, and the boiler slag discharging and sampling device 5 is used for sampling slag after combustion in the boiler combustion chamber 4; the furnace slag temperature measuring meter 6 is used for measuring the slag discharging temperature of the hearth; the air preheater 7 is used for preheating air entering the boiler combustion chamber 4; the exhaust gas temperature measuring device 8 is used for measuring the temperature of the exhaust gas after the air preheater 7; the flue gas component analysis device 9 is used for analyzing O in flue gas after the air preheater 72、CO、CO2Content (c); the fly ash sampling device 10 is used for extracting fly ash after the air preheater 7(ii) a The dust remover 11 is used for removing dust generated by flue combustion; the primary fan 12 is used for drying and conveying the ground raw coal into a hearth; the blower 13 supplies combustion air to the boiler combustion chamber 4; the ambient temperature meter 14 is used for detecting the ambient temperature near the inlet of the blower 13, and the boiler main steam flow collecting device 15 is used for collecting the actual evaporation amount during the boiler thermal efficiency test.
The raw coal sampling device 2 comprises a sampling tube, the sampling tube is arranged on a coal dropping tube behind the raw coal bin 3, the original raw coal left in the sampling tube is emptied before sampling, the raw coal is sampled at least 2kg each time, and the sampled raw coal is uniformly mixed and then sent to a laboratory for testing so as to reduce errors.
The slag temperature measuring gauge 6 detects the temperature of the slag discharged from the boiler combustion chamber 4 by using a YDIR-AH type infrared thermometer.
The exhaust smoke temperature measuring device 8 comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measuring hole of a vertical flue behind the air preheater 7, and the ARC-MET8000 type data acquisition system is used for acquiring measured data of the K-type thermocouple.
The flue gas component analysis device 9 adopts an OXYMAT61 flue gas component analysis system to detect O in flue gas preheated by the air preheater 72、CO、CO2And (4) checking the air tightness of the detection equipment before measurement so as to reduce errors.
The fly ash sampling device 10 comprises a sampling hole and an AKOMA200 type fly ash constant-speed sampling gun which are arranged in a vertical flue behind an air preheater 7, the fly ash sampling device 10 is kept well sealed, the fly ash constant-speed sampling gun is blown by compressed air before sampling to remove internal accumulated ash, a sampling head of the fly ash constant-speed sampling gun is opposite to the direction of flue gas flow during sampling, the taken fly ash is put into a container with a cover as soon as possible to prevent moisture absorption, and the sampled fly ash is uniformly mixed and then sent to a laboratory for testing to reduce errors.
The environment temperature measuring meter 14 comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measuring hole of a vertical flue behind the air preheater 7, and the ARC-MET8000 type data acquisition system is used for acquiring measured data of the K-type thermocouple.
The utility model discloses a coal fired power plant boiler monitoring system's application flow does: the flue gas temperature t after the preheating of the air preheater 7 is measured by the flue gas temperature measuring device 8pyAnd O in the flue gas preheated by the air preheater 7 is obtained by analyzing through a flue gas component analysis device 92、CO2Content, measured by an ambient temperature meter 14 to obtain an ambient temperature t0Measured flue gas temperature tpyO in flue gas2、CO2Content, ambient temperature t0According to the formula
Calculating the heat loss q of boiler exhaust smoke2Wherein αpyIs the rear air excess factor of the air preheater according to
Calculation of O2The volume content percentage of the oxygen in the flue gas after preheating the air for the air preheater; k is a radical of1The calculated strength of the heat loss brought away by the dry flue gas in the flue gas after the air is preheated by the air preheater is 3.55/DEG C; k is a radical of2The calculated strength of the heat loss brought away by the water vapor after the air is preheated by the air preheater is 0.44/DEG C; t is tpyThe exhaust gas temperature, DEG C; t is t0Is at ambient temperature, DEG C.
The CO content in the flue gas preheated by the air preheater 7 is obtained by analyzing the flue gas component analysis device 9, the CO content in the flue gas preheated by the air preheater is extremely low due to the fact that the power station boiler is fully combusted by burning coal, and the heat loss q caused by incomplete combustion of the boiler combustible gas is calculated according to the CO content in the flue gas obtained by analyzing3Is 0.
The raw coal ground by the coal grinding machine 1 is sampled by the raw coal sampling device 2, the fly ash sampling device 10 extracts fly ash preheated by the air preheater 7, and the low-level calorific value Q of the raw coal sample is carried out by adopting an industrial analysis methodnet，arAnd the combustible content of slag behind the slag extractor ClzAfter preheating by the air preheater 7Fly ash combustible content CfhPerforming measurement, and obtaining the result according to the formula
Calculating the incomplete combustion heat loss q of the solid4(ii) a Wherein Q isbTaking 33727kj/kg as the calorific value of the standard coal; qrkJ/kg is the measured low-grade calorific value of the fire coal; a. theyα mass percent of ash based on the received coallzα mass percent of the ash content in the slagfhThe mass percentage of the ash content in the fly ash in the total ash content is shown; clzThe mass percentage of combustible materials in the slag is; cfhIs the mass percentage of combustible materials in the fly ash.
The actual evaporation D when the thermal efficiency of the boiler is tested is acquired by the main steam flow acquisition device 15 of the boilereLooking up appendix I of 'Power station boiler Performance test procedure' GB10184-2015, recording percentage of heat loss q under rated boiler evaporation5e、D0For rated evaporation capacity of boiler according to formula
Calculating the heat dissipation loss q of the boiler5。
Sampling the slag after combustion in the boiler combustion chamber 4 by a slag discharge sampling device 5, and measuring the slag temperature t by a slag temperature measuring meter 6 for the sampled slaglzAccording to the formula
Calculating the physical heat loss q of the ash6(ii) a Wherein A isyThe mass content percentage of the received base ash for the fire coal; qrα for measuring lower calorific value of coallzThe mass percentage of the ash content in the slag in the total ash content is; c. Clz is the specific heat of the slag, cfhLooking up appendix E of 'test procedure for boiler performance in power station' GB10184-2015, kj/(kg. ℃), for the specific heat of fly ash; t is tpyThe exhaust gas temperature, DEG C; t is t0Is at ambient temperature, DEG C.
Finally according to the calculationHeat loss q of exhaust gas from boiler2Incomplete combustion heat loss q of boiler combustible gas3Heat loss q due to incomplete combustion of solids4Boiler heat dissipation loss q5Physical heat loss of ash and slag q6Calculated boiler thermal efficiency η ═ 100- (q —)2+q3+q4+q5+q6)]％。
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or modifications within the technical scope of the present invention, and all should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a coal fired power plant boiler monitoring system, coal fired power plant boiler includes coal pulverizer (1), raw coal storehouse (3), boiler combustion chamber (4), air heater (7), dust remover (11), primary air fan (12), forced draught blower (13), its characterized in that: comprises a raw coal sampling device (2), a boiler slag discharge sampling device (5), a slag temperature measuring meter (6), a smoke temperature measuring device (8), a smoke component analyzing device (9), a fly ash sampling device (10), an environmental temperature measuring meter (14) and a boiler main steam flow collecting device (15);
a raw coal sampling device (2) is arranged above the coal mill (1), the upper end of the raw coal sampling device (2) is communicated with a raw coal bin (3), the boiler slag discharge sampling device (5) and the slag temperature measuring meter (6) are arranged at a slag discharge port of a boiler combustion chamber (4), the air preheater (7) is arranged in a vertical flue of the boiler combustion chamber (4), the exhaust gas temperature measuring device (8), the flue gas component analyzing device (9) and the fly ash sampling device (10) are arranged on a measuring hole of the vertical flue behind the air preheater (7), and the environment temperature measuring meter (14) is arranged near an inlet of a blower (13);
the raw coal sampling device (2) is used for sampling raw coal before being ground by the coal grinding machine (1); the boiler slag-discharging sampling device (5) is used for burning the boiler combustion chamber (4)Sampling the burned furnace slag; the furnace slag temperature measuring meter (6) is used for measuring the slag discharging temperature of the hearth; the air preheater (7) preheats the air before entering the boiler combustion chamber (4) by using the flue gas; the exhaust gas temperature measuring device (8) is used for measuring the temperature of the exhaust gas after the air preheater (7); the flue gas component analysis device (9) is used for analyzing O in the flue gas after the air preheater (7)2、CO、CO2Content (c); the fly ash sampling device (10) is used for extracting fly ash after the air preheater (7); the environment temperature measuring meter (14) is used for detecting the environment temperature near the inlet of the air feeder (13), and the boiler main steam flow collecting device (15) is used for collecting the actual evaporation capacity during the heat efficiency test of the boiler.
2. A coal-fired utility boiler monitoring system according to claim 1, characterized in that the raw coal sampling device (2) comprises a sampling tube.
3. The coal-fired power plant boiler monitoring system according to claim 1, characterized in that the flue gas temperature measuring device (8) comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measuring hole of a vertical flue of the air preheater (7), and the ARC-MET8000 type data acquisition system is used for acquiring K-type thermocouple measurement data.
4. The coal-fired power plant boiler monitoring system according to claim 1, characterized in that the fly ash sampling device (10) comprises a sampling hole and a fly ash constant-speed sampling gun installed in the vertical flue of the air preheater (7).
5. The coal-fired power plant boiler monitoring system according to claim 1, characterized in that the ambient temperature meter (14) comprises a K-type thermocouple and an ARC-MET8000 type data acquisition system, the K-type thermocouple is connected with the ARC-MET8000 type data acquisition system, the K-type thermocouple is installed on a temperature measurement hole of a vertical flue of the air preheater (7), and the ARC-MET8000 type data acquisition system is used for acquiring K-type thermocouple measurement data.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111692594A (en) * | 2020-06-28 | 2020-09-22 | 北京隆普智能科技有限公司 | Control method and system of carbonization furnace for pyrolysis treatment of household garbage |
| CN111895384A (en) * | 2020-07-01 | 2020-11-06 | 江苏方天电力技术有限公司 | Overtemperature and recessive overtemperature screening and evaluating method for boiler water wall of thermal power plant |
| CN112097236A (en) * | 2020-09-24 | 2020-12-18 | 尚尔发 | Automatic energy-saving control system of electrical engineering suitable for thermal power plant |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692594A (en) * | 2020-06-28 | 2020-09-22 | 北京隆普智能科技有限公司 | Control method and system of carbonization furnace for pyrolysis treatment of household garbage |
| CN111692594B (en) * | 2020-06-28 | 2021-11-26 | 北京汇潮云集科技有限公司 | Control method and system of carbonization furnace for pyrolysis treatment of household garbage |
| CN111895384A (en) * | 2020-07-01 | 2020-11-06 | 江苏方天电力技术有限公司 | Overtemperature and recessive overtemperature screening and evaluating method for boiler water wall of thermal power plant |
| CN112097236A (en) * | 2020-09-24 | 2020-12-18 | 尚尔发 | Automatic energy-saving control system of electrical engineering suitable for thermal power plant |
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