CN111974551B - System for reducing power consumption of electrostatic dust collector and control method thereof - Google Patents
System for reducing power consumption of electrostatic dust collector and control method thereof Download PDFInfo
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- CN111974551B CN111974551B CN202010779223.8A CN202010779223A CN111974551B CN 111974551 B CN111974551 B CN 111974551B CN 202010779223 A CN202010779223 A CN 202010779223A CN 111974551 B CN111974551 B CN 111974551B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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Abstract
The invention provides a system for reducing the power consumption of an electrostatic dust collector and a control method thereof. The invention can automatically adjust the operation parameters of the high-voltage electric field of the electrostatic dust collector according to the collected parameters of the unit load P of the generator set, the water-coal ratio D of the power generation steam boiler, the smoke content G of the total discharge port of the power plant and the like, flexibly adjust the secondary voltage U2 and the secondary current I2 of the high-voltage electric field of the electrostatic dust collector according to the actual situation of the field work of the power plant, reduce the power consumption of the electrostatic dust collector, reduce the power supply coal consumption of the coal-fired power plant, improve the overall power generation benefit of the unit, reduce the emission of smoke at the same time and make contribution to environmental protection.
Description
Technical Field
The invention relates to the technical field of energy conservation and emission reduction, in particular to a system for reducing the power consumption of an electrostatic dust collector and a control method thereof.
Background
The electrostatic precipitator is used as a large power consumption user of a coal-fired power plant, the power consumption rate of the electrostatic precipitator greatly affects the plant power consumption rate, and is directly related to the size of power supply coal, and the power supply coal consumption is the important factor of three indexes (electric quantity, power supply coal consumption and plant power consumption rate) of the coal-fired power plant. How to improve the dust collector efficiency of dust remover, when guaranteeing that the environmental protection is discharge up to standard, reduce electrostatic precipitator factory power consumption, realize the optimization operation of dust remover energy-conservation, environmental protection, be the problem that awaits the solution urgently.
The parameters of the high-voltage electric field of the existing dust collector are manually set once, in order to ensure the standard emission of the smoke dust, the parameters are basically set according to the highest parameters, namely, the high-voltage electric field of the electrostatic dust collector is kept to operate near the rated voltage and the rated current and cannot be changed along with the load (namely the smoke amount), the actual smoke amount is much smaller than that under the rated load in a low-load period, the total smoke dust amount in the smoke is also not large, the parameter operation of the high-voltage electric field can be completely reduced at the moment, and if the high-parameter operation of the high-voltage electric field is kept, the method is not economical.
Secondly, the dust collecting efficiency of the electric dust collector is closely related to the specific resistance of the fly ash, and the dust collecting efficiency of the fly ash in the smoke can be greatly changed after the characteristics of the fly ash are changed, so that the factors are also considered for setting the parameters of the high-voltage electric field, but the factors are not considered in the prior art.
The periods of cathode electromagnetic rapping and anode mechanical rapping of the existing electrostatic precipitator are not changed, and the ash quantity collected on a polar plate and a polar line in unit time is different along with the change of load in the actual condition, so that the high-load smoke quantity is large, the dust collection quantity is large, the smoke quantity in the low-load period is small, and the dust collection quantity is small, therefore, the rapping period should be changed in time in the high-load period and the low-load period, the generation of secondary raise dust is reduced, the working output of the dust precipitator can be reduced, and the power consumption of the dust precipitator is reduced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a system for reducing the power consumption of an electrostatic precipitator and a control method thereof, so as to solve the problems proposed in the background art.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
the utility model provides a system for reduce electrostatic precipitator power consumption, is including connecting anti-parallel thyristor, ampere meter, the voltmeter in secondary transformer primary loop to and the rectifier bridge of connection in secondary transformer secondary loop, voltage current sampling circuit and electrostatic precipitator's electric precipitation body is connected to the rectifier bridge output, voltage current sampling circuit connects the microcomputer control ware input, the preceding stage transformer is elementary to the microcomputer control ware output connection, the secondary transformer is elementary to preceding stage transformer secondary connection, manual/automatic switch module is still connected to the microcomputer control ware input, manual setting module of high-voltage electric field parameter, high-voltage electric field parameter automatic control are connected to manual/automatic switch module input, load feedback module, water coal ratio feedback module, high-voltage electric field parameter automatic control ware input is connected, A smoke content feedback module, wherein:
the load feedback module is used for collecting the unit load P of the generator set and feeding back the unit load P to the high-voltage electric field parameter automatic controller;
the water-coal ratio feedback module is used for collecting the water-coal ratio D of the power generation steam boiler and feeding back the water-coal ratio D to the high-voltage electric field parameter automatic controller;
and the smoke content feedback module is used for collecting the smoke content G of the total discharge outlet of the power plant and feeding back the smoke content G to the high-voltage electric field parameter automatic controller.
Preferably, the anti-parallel thyristor is connected in series in the primary circuit of the secondary transformer, one end of the ammeter is connected to the anti-parallel thyristor, the other end of the ammeter is grounded, the voltmeter is connected in parallel with the primary circuit of the secondary transformer, and the voltmeter and the ammeter respectively collect the voltage U2 and the current I2 of the primary circuit of the secondary transformer for supplying power to the electric dust removal body.
Preferably, the pre-stage transformer is a transformer capable of transforming from 220VAC to 380 VAC.
Preferably, the voltage and current sampling circuit comprises a voltage sampling circuit connected with the electric dust removal body in parallel and a current sampling circuit connected to the rectifier bridge; the voltage sampling circuit comprises sampling resistors R2 and R3 which are connected in series, and a sampling point at the connection position of the sampling resistors R2 and R3 is electrically connected with the microcomputer controller; the current sampling circuit is a current sampling resistor R1, one end of the current sampling resistor R1 is connected with the input end of the microcomputer controller and the output end of the rectifier bridge, and the other end of the current sampling resistor R1 is grounded.
Preferably, the electric dust removal body is further connected with a damping resistor R0 in series.
A control method for reducing the power consumption of an electrostatic dust collector comprises the following steps:
the control of the high-voltage electric field parameters of the electrostatic dust collector comprises 2 instructions, including using a manual control mode under the conditions of starting and stopping the generator set and carrying out exception handling; during the normal operation of the generator set, switching to an automatic control mode; the high-voltage electric field parameters are voltage U2 and current I2 of a primary loop of the secondary transformer;
in the automatic control mode, a load feedback module acquires a unit load P of a generator set, a water-coal ratio feedback module acquires a water-coal ratio D of a power generation steam boiler, a smoke content feedback module acquires a total discharge port smoke content G of a power plant, and parameter values of the unit load P, the water-coal ratio D and the total discharge port smoke content G are all sent to a high-voltage electric field parameter automatic controller;
the high-voltage electric field parameter automatic controller realizes the automatic adjustment of the high-voltage electric field parameters of the electric dust removal body of the electrostatic dust collector according to the comprehensive operation of several criteria including unit load P, water-coal ratio D and total discharge port smoke dust content G.
Preferably, the high-voltage electric field parameter automatic controller realizes automatic adjustment of the high-voltage electric field parameters of the electrostatic precipitator body according to comprehensive operation of several criteria including unit load P, water-coal ratio D and total discharge port smoke content G, and specifically comprises the following steps:
selecting secondary voltage U2 and secondary current I2 of a high-voltage electric field of the electrostatic dust collector as regulated quantities, selecting smoke content G of a total discharge port as feedback quantity, selecting unit load P as feed-forward quantity, and selecting a water-coal ratio D as correction quantity, wherein the specific logic regulation relation is as the following table;
wherein Pe in the table is rated load of the generator set, and Ue and Ie respectively represent rated secondary voltage and rated secondary current of a high-voltage electric field of the electrostatic dust collector; and providing that the smoke content of the total exhaust port is not greater than 7mg/m during normal operation of the train.
Preferably, the calculation formula of the water-coal ratio D is that D is a feedwater flow/fuel quantity, wherein a corresponding relationship between the feedwater flow and the fuel quantity is as follows: the water is completely converted to the amount of fuel needed for the steam that can be used for the turbine to do work.
Preferably, the smoke content G is determined by a laser backscattering determination principle, which specifically comprises: the laser signal source signal passes through the flue to irradiate the smoke dust particles, the irradiated smoke dust particles emit laser, the intensity of the reflected laser changes in direct proportion to the smoke dust concentration, and the smoke dust concentration can be calculated through the direct proportion coefficient of the intensity of the reflected laser and the smoke dust concentration.
The technical scheme of the invention has the following beneficial effects:
the invention can automatically adjust the operation parameters of the high-voltage electric field of the electrostatic dust collector according to the collected parameters of the unit load P of the generator set, the water-coal ratio D of the power generation steam boiler, the smoke content G of the total discharge port of the power plant and the like, flexibly adjust the secondary voltage U2 and the secondary current I2 of the high-voltage electric field of the electrostatic dust collector according to the actual situation of the field work of the power plant, reduce the power consumption of the electrostatic dust collector, reduce the power supply coal consumption of the coal-fired power plant, improve the overall power generation benefit of the unit, reduce the emission of smoke at the same time and make contribution to environmental protection.
Drawings
FIG. 1 is a schematic block diagram of a system for reducing power consumption in an electrostatic precipitator in accordance with the present invention;
FIG. 2 is a block diagram of the unit load collection principle of the load feedback module of the present invention;
FIG. 3 is a schematic diagram of the water-coal ratio feedback module of the present invention collecting the water-coal ratio;
FIG. 4 is a schematic diagram of the smoke content feedback module of the present invention collecting smoke content;
FIG. 5 is a high voltage electric field parameter operation diagram before the optimization of the present invention;
FIG. 6 is an optimized high-voltage electric field parameter operation diagram according to the present invention;
FIG. 7 is a current trend chart of the dust removing transformer before and after the optimization of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the system for reducing the power consumption of the electrostatic precipitator of the present invention includes an anti-parallel thyristor, an ammeter, a voltmeter connected in the primary loop of the secondary transformer, and a rectifier bridge connected in the secondary loop of the secondary transformer, wherein the output end of the rectifier bridge is connected to a voltage and current sampling circuit and the electrostatic precipitator body of the electrostatic precipitator, the voltage and current sampling circuit is connected to the input end of a microcomputer controller, the output end of the microcomputer controller is connected to the primary of the pre-stage transformer, and the secondary of the pre-stage transformer is connected to the primary of the secondary transformer. The input end of the microcomputer controller is also connected with a manual/automatic switching module, the input end of the manual/automatic switching module is connected with a high-voltage electric field parameter manual setting module and a high-voltage electric field parameter automatic controller, and the input end of the high-voltage electric field parameter automatic controller is connected with a load feedback module, a water-coal ratio feedback module and a smoke content feedback module, wherein:
the load feedback module is used for collecting the unit load P of the generator set and feeding back the unit load P to the high-voltage electric field parameter automatic controller;
the water-coal ratio feedback module is used for collecting the water-coal ratio D of the power generation steam boiler and feeding back the water-coal ratio D to the high-voltage electric field parameter automatic controller;
and the smoke content feedback module is used for collecting the smoke content G of the total discharge outlet of the power plant and feeding back the smoke content G to the high-voltage electric field parameter automatic controller.
Preferably, the anti-parallel thyristor is connected in series in the primary loop of the secondary transformer, one end of an ammeter is connected to the anti-parallel thyristor, the other end of the ammeter is grounded, a voltmeter is connected in parallel with the primary loop of the secondary transformer, and the voltmeter and the ammeter respectively collect the voltage U2 and the current I2 of the primary loop of the secondary transformer for supplying power to the electric dust removal body.
Wherein, the pre-stage transformer is a transformer capable of changing from 220VAC to 380 VAC.
The voltage and current sampling circuit comprises a voltage sampling circuit connected with the electric precipitation body in parallel and a current sampling circuit connected to the rectifier bridge; the voltage sampling circuit comprises sampling resistors R2 and R3 which are connected in series, and a sampling point at the connection position of the sampling resistors R2 and R3 is electrically connected with the microcomputer controller; the current sampling circuit is a current sampling resistor R1, one end of the current sampling resistor R1 is connected with the input end of the microcomputer controller and the output end of the rectifier bridge, and the other end of the current sampling resistor R1 is grounded. The electric precipitation body is also connected with a damping resistor R0 in series.
The invention provides a control method for reducing the power consumption of an electrostatic dust collector, which comprises the following steps:
as shown in fig. 1, the control of the high-voltage electric field parameters of the electrostatic precipitator includes 2 instructions, including using a manual control mode in the case of start-up and shut-down of the generator set and exception handling; during the normal operation of the generator set, switching to an automatic control mode; the parameters of the high-voltage electric field are the voltage U2 and the current I2 of a primary loop of the secondary transformer;
in an automatic control mode, a load feedback module acquires a unit load P of a generator set, a water-coal ratio feedback module acquires a water-coal ratio D of a power generation steam boiler, a smoke content feedback module acquires a total discharge port smoke content G of a power plant, and parameter values of the unit load P, the water-coal ratio D and the total discharge port smoke content G are all sent to a high-voltage electric field parameter automatic controller;
the high-voltage electric field parameter automatic controller realizes the automatic adjustment of the high-voltage electric field parameters of the electric dust removal body of the electrostatic dust collector according to the comprehensive operation of several criteria including unit load P, water-coal ratio D and total discharge port smoke dust content G. Therefore, the high-voltage electric field parameters of the electrostatic dust collector can be automatically adjusted according to the comprehensive operation of several criteria such as unit load, coal quality condition of fire coal, outlet smoke content and the like, and the energy-saving optimization is realized.
The high-voltage electric field parameter automatic controller realizes automatic adjustment of the high-voltage electric field parameters of the electrostatic precipitator body according to comprehensive operation of several criteria including unit load P, water-coal ratio D and total discharge port smoke content G, and specifically comprises the following steps:
selecting secondary voltage U2 and secondary current I2 of a high-voltage electric field of the electrostatic dust collector as regulated quantities, selecting smoke content G of a total discharge port as feedback quantity, selecting unit load P as feed-forward quantity, and selecting a water-coal ratio D as correction quantity, wherein the specific logic regulation relation is as the following table;
wherein Pe in the table is rated load of the generator set, and Ue and Ie respectively represent rated secondary voltage and rated secondary current of a high-voltage electric field of the electrostatic dust collector; and providing that the smoke content of the total exhaust port is not greater than 7mg/m during normal operation of the train.
The following introduces the principle of the control method for reducing the power consumption of the electrostatic dust collector, and three variables are required to be introduced to realize the automatic adjustment of the parameters of the electric dust removing high-voltage electric field according to the amount of smoke and the content of smoke dust in the smoke:
1. real time power (unit load) P of the generator. The variable represents the size of the flue gas volume entering the dust remover, the higher the load is, the larger the flue gas volume is, the more dust needs to be removed, and the higher high-voltage electric field parameter is needed, on the contrary, the smaller the unit load is, the smaller the flue gas volume is, the less dust needs to be removed, the lower high-voltage electric field parameter can be kept, and the variable is used as a feedback signal and is introduced into the automatic controller for the high-voltage electric field parameter of the electric dust removal. Referring to the attached figure 2, the voltage and the current at the output end of the generator are collected by a voltage transformer and a current transformer, and the load P of the generator set is calculated after the operation of a power amplifier.
2. The boiler water-coal ratio D is calculated by the formula D, wherein the formula D is water supply flow/fuel quantity, and the corresponding relation between the water supply flow and the fuel quantity is as follows: the water is completely converted to the amount of fuel needed for the steam that can be used for the turbine to do work. The power generation process of the coal-fired power plant is simple, namely, water is changed into steam through a boiler, and the steam drives a steam turbine to rotate to drive a generator to generate power. The concept of water-to-coal ratio is the amount of coal required to convert a unit mass of water to acceptable steam, for example, 100 tons of coal are required to convert 1000 tons of water to steam that can be used for turbine work, so the water-to-coal ratio is 1000/100-10, and if 150 tons of coal are required, the water-to-coal ratio is 1000/150-6.7. The same amount of water is converted into the same steam, the coal quality difference is represented by different coal amounts, the lower the water-coal ratio is, the worse the coal quality is, the coal amount used by the generator under the same load is greatly different, the larger the coal amount is, the larger the flue gas amount is, therefore, the feedback signal of the variable water-coal ratio is introduced into the electric precipitation high-voltage electric field parameter automatic controller as a correction quantity, and a water-coal ratio calculation principle diagram is shown in an attached figure 3.
3. Total exhaust port soot content G. The content of the smoke dust in the total discharge port is used as a final regulated quantity, the working principle of the system is that a laser backscattering measurement principle is adopted, a laser signal source signal penetrates through a flue to irradiate smoke dust particles, the irradiated smoke dust particles emit laser, the intensity of the reflected laser changes in direct proportion to the concentration of the smoke dust, the concentration of the smoke dust can be calculated through a specific algorithm, and the attached figure 4 is a smoke dust concentration measurement principle diagram.
The following examples are provided to illustrate the improved benefits of the present invention:
fig. 5 shows the parameters of the high-voltage electric field before optimization, and it can be seen from the figure that before the result, the parameters of the high-frequency power supply always keep high-parameter operation: the secondary current is set to 800mA, the charging ratio is 0, and the mode always maintains the high-voltage electric field to run at high parameters, so that the dust collection efficiency can be effectively ensured, but the energy consumption is too large; FIG. 6 shows the high-frequency parameters of the optimized high-voltage electric field: the secondary current is set at 750mA in a high-load period, the charging ratio is set at 0, the secondary current is set at 700mA in a low-load period, the charging ratio is set at 5, the normal dust collecting effect is achieved by utilizing a high-frequency pulse principle, the power consumption is saved, and meanwhile, the smoke content in smoke emission is also remarkably reduced due to the fact that the rapping mode of polar plates (polar lines) is optimized.
The detailed benefit calculation can be analyzed by referring to the current trend graphs of the dust removal transformer before and after the result of fig. 7.
After the parameters are changed, the saved plant power consumption can be analyzed through FIG. 7. Fig. 7 is a dust removal variable current curve a, and it can be seen that, before optimization, the current magnitude is substantially a straight line, the current magnitude is about 80A, and the electric quantity consumed by each dust removal variable per day is 80 × 6 × 1.732 × 0.80 × 24 ═ 15962 Kwh; after optimization, 8: 00 to 21: 00 high-voltage electric field high-parameter operation, 21: 00-08: the power consumption of the dust removal operation is 80 × 6 × 1.732 × 0.80 × 13+30 × 6 × 1.732 × 0.80 × 11 (11389 Kwh) in the case of 00-point reduction parameter operation. Compared with the prior art, the electricity saving amount of one dedusting transformer is 15962 and 11389 which is 4572Kwh, the electricity saving amount of one unit is 2 dedusting transformers, and the electricity saving amount of the unit which is 2 × 4572 which is 9145Kwh can be realized each day. Because this 2 factory 600MW units belong to the power of Anhui and send the unit in east, utilize hour height, on average annual net operation is no less than 320 days, can calculate that the unit can practice thrift the electric quantity because of high-voltage electric field parameter optimization every year 9145 x 320 ═ 2926400Kwh ≈ 300 ten thousand degrees. And further calculating the proportion of the value in the station power, wherein the proportion is calculated according to 64.7 hundred million of 2 600MW power generation in 14 years, the single-machine power generation amount is 32 hundred million, the station power saving rate is 3000000/3200000000-0.0009375-0.09375%, namely the saving rate of the station power is about 0.1%, the converted power is 64.7 hundred million degrees multiplied by 0.1-670 ten thousand degrees, the converted power is converted into the power generation cost, the capital is saved by 201 ten thousand yuan per year, and the annual emission of the dust in the smoke is reduced by 263 tons.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. The utility model provides a system for reduce electrostatic precipitator power consumption, is including connecting anti-parallel thyristor, ampere meter, the voltmeter in secondary transformer primary loop to and the rectifier bridge of connection in secondary transformer secondary loop, voltage current sampling circuit and electrostatic precipitator's electric precipitation body is connected to the rectifier bridge output, voltage current sampling circuit connects the microcomputer control ware input, the microcomputer control ware output is connected the preceding stage transformer elementary, the secondary transformer is connected to the preceding stage transformer secondary elementary, its characterized in that: the input end of the microcomputer controller is also connected with a manual/automatic switching module, the input end of the manual/automatic switching module is connected with a high-voltage electric field parameter manual setting module and a high-voltage electric field parameter automatic controller, and the input end of the high-voltage electric field parameter automatic controller is connected with a load feedback module, a water-coal ratio feedback module and a smoke content feedback module, wherein:
the load feedback module is used for collecting the unit load P of the generator set and feeding back the unit load P to the high-voltage electric field parameter automatic controller;
the water-coal ratio feedback module is used for collecting the water-coal ratio D of the power generation steam boiler and feeding back the water-coal ratio D to the high-voltage electric field parameter automatic controller;
the smoke content feedback module is used for collecting the smoke content G of the total discharge outlet of the power plant and feeding back the smoke content G to the high-voltage electric field parameter automatic controller;
the anti-parallel thyristor is connected in series in a primary loop of the secondary transformer, one end of the ammeter is connected to the anti-parallel thyristor, the other end of the ammeter is grounded, the voltmeter is connected in parallel with the primary loop of the secondary transformer, and the voltmeter and the ammeter respectively collect the voltage U2 and the current I2 of the primary loop of the secondary transformer for supplying power to the electric dust removal body;
the pre-stage transformer is a transformer capable of changing from 220VAC to 380 VAC;
the voltage and current sampling circuit comprises a voltage sampling circuit connected with the electric dust removal body in parallel and a current sampling circuit connected to the rectifier bridge; the voltage sampling circuit comprises sampling resistors R2 and R3 which are connected in series, and a sampling point at the connection position of the sampling resistors R2 and R3 is electrically connected with the microcomputer controller; the current sampling circuit is a current sampling resistor R1, one end of the current sampling resistor R1 is connected with the input end of the microcomputer controller and the output end of the rectifier bridge, and the other end of the current sampling resistor R1 is grounded;
the electric dust removal body is also connected with a damping resistor R0 in series;
the control method of the system for reducing the power consumption of the electrostatic dust collector comprises the following steps:
the control of the high-voltage electric field parameters of the electrostatic dust collector comprises 2 instructions, including using a manual control mode under the conditions of starting and stopping the generator set and carrying out exception handling; during the normal operation of the generator set, switching to an automatic control mode; the high-voltage electric field parameters are voltage U2 and current I2 of a primary loop of the secondary transformer;
in the automatic control mode, a load feedback module acquires a unit load P of a generator set, a water-coal ratio feedback module acquires a water-coal ratio D of a power generation steam boiler, a smoke content feedback module acquires a total discharge port smoke content G of a power plant, and parameter values of the unit load P, the water-coal ratio D and the total discharge port smoke content G are all sent to a high-voltage electric field parameter automatic controller;
the high-voltage electric field parameter automatic controller realizes the automatic adjustment of the high-voltage electric field parameters of the electric dust removal body of the electrostatic dust collector according to the comprehensive operation of several criteria including unit load P, water-coal ratio D and total discharge port smoke content G;
the high-voltage electric field parameter automatic controller realizes the automatic adjustment of the high-voltage electric field parameters of the electric dust removal body of the electrostatic dust collector according to the comprehensive operation of the unit load P, the water-coal ratio D and the total discharge port smoke dust content G, and specifically comprises the following steps:
selecting secondary voltage U2 and secondary current I2 of a high-voltage electric field of the electrostatic dust collector as regulated quantities, selecting smoke content G of a total discharge port as feedback quantity, selecting unit load P as feed-forward quantity, and selecting a water-coal ratio D as correction quantity, wherein the specific logic regulation relation is as the following table;
wherein Pe in the table is rated load of the generator set, and Ue and Ie respectively represent rated secondary voltage and rated secondary current of a high-voltage electric field of the electrostatic dust collector; and regulating the smoke content of the total discharge port to be not more than 7mg/m during normal operation of the unit;
the calculation formula of the water-coal ratio D is that D is water supply flow/fuel quantity, wherein the corresponding relation between the water supply flow and the fuel quantity is as follows: the water is completely converted into the fuel quantity required by the steam which can be used for the steam turbine to do work;
the smoke content G is measured by adopting a laser backscattering measurement principle, and specifically comprises the following steps: the laser signal source signal passes through the flue to irradiate the smoke dust particles, the irradiated smoke dust particles emit laser, the intensity of the reflected laser changes in direct proportion to the smoke dust concentration, and the smoke dust concentration can be calculated through a direct proportion coefficient of the intensity of the reflected laser and the smoke dust concentration.
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| CN111570093B (en) * | 2020-05-22 | 2022-05-13 | 华能平凉发电有限责任公司 | Electric precipitation energy-saving control method and system based on boiler coal quantity and air quantity |
| CN112934468A (en) * | 2021-01-27 | 2021-06-11 | 华能国际电力股份有限公司营口电厂 | Method for preventing frequent flashover of electric precipitation system |
| CN112934467A (en) * | 2021-01-27 | 2021-06-11 | 华能国际电力股份有限公司营口电厂 | Production load-based intelligent control method for output power of electric precipitation rectifier transformer |
| CN112973965B (en) * | 2021-02-07 | 2022-10-18 | 宁夏枣泉发电有限责任公司 | Electric precipitation outlet smoke dust concentration closed-loop control method realized in DCS |
| CN114453136B (en) * | 2022-02-10 | 2024-05-07 | 南方电网电力科技股份有限公司 | Self-adaptive control system and control method for electrostatic precipitator |
| CN114798179B (en) * | 2022-05-25 | 2024-03-19 | 南方电网电力科技股份有限公司 | Control method and device of electrostatic precipitator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420701A (en) * | 1990-05-14 | 1992-01-24 | Hirakawa Tekkosho:Kk | Method of controlling boiler load and its device |
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|---|---|---|---|---|
| CN101152637B (en) * | 2006-09-25 | 2010-12-29 | 北京信实德环保科技有限公司 | Power-supply controller of electric dust collector and long-range control system of the same |
| CN201064737Y (en) * | 2007-04-25 | 2008-05-28 | 金华大维电子科技有限公司 | Three-phase high voltage power supply for electric precipitation |
| CN102847610B (en) * | 2012-08-23 | 2013-05-01 | 襄阳九鼎昊天环保设备有限公司 | DC composite pulse high voltage power supply for electrostatic precipitator |
| CN103977899A (en) * | 2014-06-09 | 2014-08-13 | 唐山国丰钢铁有限公司 | Power saving control method for dry-dedusting high voltage electric field |
| CN104971824B (en) * | 2015-07-06 | 2017-03-08 | 华能国际电力开发公司铜川照金电厂 | Dry electric precipitation and wet scrubber dust joint automatic control system |
| CN205851110U (en) * | 2016-06-30 | 2017-01-04 | 华能吉林发电有限公司长春热电厂 | A kind of coal-fired power plant four electric field electric precipitation intelligence control system |
| CN109365134B (en) * | 2018-10-18 | 2020-05-05 | 西安西热锅炉环保工程有限公司 | Automatic control method of dust removal system in coal-fired power generation system |
| CN110943493B (en) * | 2019-10-31 | 2021-11-30 | 厦门龙净环保节能科技有限公司 | Three-phase direct current high voltage power supply intermittent power supply circuit for electric precipitation |
-
2020
- 2020-08-05 CN CN202010779223.8A patent/CN111974551B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420701A (en) * | 1990-05-14 | 1992-01-24 | Hirakawa Tekkosho:Kk | Method of controlling boiler load and its device |
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