CN114895555A - Coal-fired unit furnace coal holographic input environmental protection system optimization method - Google Patents
Coal-fired unit furnace coal holographic input environmental protection system optimization method Download PDFInfo
- Publication number
- CN114895555A CN114895555A CN202210419962.5A CN202210419962A CN114895555A CN 114895555 A CN114895555 A CN 114895555A CN 202210419962 A CN202210419962 A CN 202210419962A CN 114895555 A CN114895555 A CN 114895555A
- Authority
- CN
- China
- Prior art keywords
- coal
- parameters
- ash
- total
- fired
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005457 optimization Methods 0.000 title claims abstract description 20
- 230000007613 environmental effect Effects 0.000 title claims description 23
- 239000002002 slurry Substances 0.000 claims abstract description 46
- 239000000428 dust Substances 0.000 claims abstract description 17
- 239000002956 ash Substances 0.000 claims description 84
- 238000001556 precipitation Methods 0.000 claims description 44
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 24
- 229910052717 sulfur Inorganic materials 0.000 claims description 24
- 239000011593 sulfur Substances 0.000 claims description 24
- 238000006477 desulfuration reaction Methods 0.000 claims description 18
- 230000023556 desulfurization Effects 0.000 claims description 18
- 238000004364 calculation method Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 235000013305 food Nutrition 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 7
- 244000241872 Lycium chinense Species 0.000 claims description 6
- 235000015468 Lycium chinense Nutrition 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 claims description 6
- 239000010883 coal ash Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 235000008446 instant noodles Nutrition 0.000 claims description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 17
- 239000007789 gas Substances 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/0205—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system
- G05B13/024—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system in which a parameter or coefficient is automatically adjusted to optimise the performance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Software Systems (AREA)
- Evolutionary Computation (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a coal fired unit coal-fired holographic recording environment-friendly system optimization method which comprises the steps of respectively collecting historical working condition data of an experimental object, obtaining optimal parameters through the historical working condition data, obtaining actual parameters under actual working conditions on the basis of analysis of characteristics of the actual working conditions, matching the historical working conditions with the actual working conditions, obtaining the optimal parameters under corresponding historical working conditions, comparing the actual parameters with the optimal parameters, adjusting parameters according to comparison results, taking load signals and coal-fired parameters as closed-loop feedback control signals, and synchronously adjusting the matching degree between the running condition of an environment-friendly system and the load coal type of a unit by combining a holographic recording closed-loop control system. The coal holographic recording system is combined with the factory coal holographic recording function, the parameters of the secondary current of the electric dust removal, the combination of the slurry circulating pumps and the operation number of the ash conveying air compressors are recommended according to the working condition change, and the operators synchronously follow and adjust the parameters, so that the matching of the operation condition of the environment-friendly system and the load coal of the unit is realized, and the energy is saved and the consumption is reduced on the basis of the optimal combination of the system.
Description
Technical Field
The invention relates to the technical field, in particular to an optimization method of a coal-fired unit coal holographic recording environmental protection system.
Background
1050MW coal-fired unit of a certain S power plant is through ultra-clean emission transformation in 2016, electric precipitation system power consumption after the transformation, desulfurization slurry circulating pump power consumption, defeated ash air compressor machine power consumption descends to some extent after the adjustment, but still there is the short slab that needs the operation personnel to adjust electric precipitation secondary current according to information such as load, coal type, operation experience, the combination of slurry circulating pump, air compressor machine total amount, and the operation personnel leads to each team adjustment to be uneven to different cognition and different processing means on scene, the relevant parameter of current S factory unit relies on manual intervention to become lagged: 1. s, the power plant is installed at the inlet of an induced draft fan, two three-chamber four-power plant electrostatic dust collectors are installed, one electric field and the second electric field are high-frequency electric fields, the third electric field and the fourth electric field are power frequency electric fields, and operators manually input parameters such as secondary current limit, charge ratio and the like on the basis of considering ultra-clean emission according to unit load and ash content of coal entering a furnace, so that control over electric dust collection is realized; 2. s, a limestone-gypsum wet flue gas desulfurization process is adopted in a plant desulfurization system, a furnace is arranged in a tower unit, 5 centrifugal slurry circulating pumps are configured, the output of the 5 pumps is gradually increased from A to E, and operators manually start and stop the slurry circulating pumps according to the change of unit load and sulfur content at an inlet of an absorption tower so as to meet the discharge standard; 3. s factory fly ash is conveyed in a positive pressure concentrated phase pneumatic conveying mode, one ash pipe is arranged in one electric field of each dust remover of each furnace, one fine ash pipe is shared by two, three and four electric fields, one ash pipe is arranged at an SCR inlet ash hopper, the two units comprise 6 screw type conveying air compressors and 6 freezing type drying machines, and operators manually start and stop the conveying air compressors according to unit loads, ash entering the furnace and ash conveying pressure, so that energy conservation is realized on the premise of meeting the conveying pressure.
It can be known from the summary that the energy conservation of the environmental protection system has the defects of uneven system adjustment according to experience levels of people, relatively lagged adjustment and no closed loop feedback, and based on the defects, the coal-fired unit coal holographic recording environmental protection system optimization method is provided to solve the problems.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems occurring in the environmental protection design of the existing coal-fired units.
Therefore, one of the objectives of the present invention is to provide an optimization method for a coal-fired unit coal-fired holographic recording environmental protection system, which obtains an optimal parameter configuration of the environmental protection system by collecting historical working condition data and according to observation statistics, that is, at the time of the lowest energy consumption, and then manually adjusts the parameters according to the optimal parameters, so as to reduce the overall energy consumption.
In order to achieve the effect, the invention provides the following technical scheme: a coal-fired unit coal-fired holographic recording environment-friendly system optimization method comprises the steps of respectively collecting historical working condition data of an experimental object, obtaining optimal parameters through the historical working condition data, obtaining actual parameters under actual working conditions on the basis of analysis of characteristics of the actual working conditions, matching the historical working conditions with the actual working conditions, obtaining optimal parameters under corresponding historical working conditions, comparing the actual parameters with the optimal parameters, adjusting parameters according to comparison results, taking load signals and coal-fired parameters as closed-loop feedback control signals, and combining a holographic recording closed-loop control system to synchronously adjust matching degree between the running conditions of the environment-friendly system and unit load coal types.
As a preferable aspect of the present invention, wherein: the experimental objects are electric precipitation parameters, desulfurization slurry circulating pump parameters and ash conveying air compressor combination parameters.
As a preferable aspect of the present invention, wherein: the optimal parameters of the electric precipitation parameters comprise electric precipitation secondary parameters, coal ash content, total coal amount of a unit and electric precipitation plant power consumption rate acquired by collecting historical months, and the optimal parameters I of electric precipitation secondary current are obtained through calculation Superior food The calculation formula of the recommendation table is as follows: i is Superior food Weighted average ash x total coal amount x 20, when I Fruit of Chinese wolfberry Deviation I Superior food >5% of the time, sending an alarm to adjust the secondary current of the electric precipitation, wherein I Fruit of Chinese wolfberry The actual value of the secondary current of the electric precipitation is obtained.
As a preferable aspect of the present invention, wherein: the optimal parameters of the desulfurization slurry circulating pump parameters comprise that under different unit loads and coal-as-fired sulfur contents, on the basis that the emission concentration of SO2 at an outlet of an absorption tower meets ultra-clean emission, the total energy consumption of the slurry circulating pump is minimum, according to the total sulfur content which is the coal-as-fired sulfur content multiplied by the total coal content of the unit, and a recommended table of the optimal parameters of the sulfur slurry circulating pump is obtained through different slurry circulating pump combinations, and when the calculated value of the actual total sulfur content is in a certain value of the total sulfur content, an alarm is given out to perform the combination adjustment of the slurry circulating pump according to the corresponding total sulfur content value.
As a preferable aspect of the present invention, wherein: the desulfurization slurry circulating pumps are provided with a plurality of slurry circulating pumps, the slurry circulating pump combination is composed of at least two slurry circulating pumps, and the slurry circulating pumps are arranged from bottom to top and the power is gradually increased from bottom to top.
As a preferable aspect of the present invention, wherein: the optimal parameters of the ash conveying air compressor combination parameters comprise the total ash amount of a single unit and the number of the single air compressors, the total ash amount of the single unit is determined by calculating the total ash amount of the unit entering the electric precipitation according to the coal combustion amount corresponding to different loads, and the calculation formula is as follows:
wherein Gfh is total ash content of electric precipitation, B is total coal content, A is average ash content of coal entering a furnace, eta is electric precipitation efficiency, and alpha is the ratio of ash content in coal to electric precipitation.
As a preferable aspect of the present invention, wherein: the determining of the number of the single air compressors comprises calculating corresponding compressed air demand according to the total ash amount of the electric precipitation, and the calculation formula is as follows:
wherein Q is the compressed air demand (m) 3 /min), Gfh is total ash amount (T/h) of electric precipitation, C is average ash-gas ratio, and rho is air density in a surface state (kg/m) 3 ) And when the actual total ash amount falls into a certain value of the total ash amount, an alarm is given to adjust the number of the air compressors of the ash conveying machine according to the corresponding total ash amount value.
As a preferable aspect of the present invention, wherein: the load signal and the coal as fired parameter are taken as closed-loop feedback control signals, and the matching degree between the running condition of the environmental protection system and the load coal type of the unit is synchronously adjusted by combining a holographic input closed-loop control system.
As a preferable aspect of the present invention, wherein: the holographic recording closed-loop control system adjusts the secondary current of the electric dust removal through ash content and total coal quantity, adjusts the combination of slurry circulating pumps through sulfur quantity and total coal quantity, and adjusts the number of the single air compressors through total ash quantity.
As a preferable aspect of the present invention, wherein: the holographic input closed-loop control system comprises a coal variety confirmed according to a coal feeding list of as-fired coal, and simultaneously, parameters are input according to coal feeding time, after the holographic input of as-fired coal is finished, built-in empirical parameters are compared with actual set parameters, an alarm is given out when deviation exceeds a certain value, electric precipitation secondary current, a slurry circulating pump combination and ash conveying air compressor number are adjusted according to a recommendation table of optimal parameters, and after t time, the holographic input closed-loop control system collects data again for comparison, the system which accords with the interval value of the recommendation table does not give an alarm any more, and otherwise, the system continues to give an alarm for adjustment to form closed-loop control.
The invention has the beneficial effects that: the coal holographic recording function of the coal entering plant is combined, the parameters of secondary current of electric dust removal, slurry circulating pump combination and the number of running ash conveying air compressors are recommended according to the working condition change, and the running personnel synchronously follow the adjustment, so that the running condition of the environment-friendly system is matched with the coal type of unit load, the energy is saved, the consumption is reduced on the basis of the optimal combination of the system, and the running reliability of the equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a diagram of an average parameter input window for a multiple-mill furnace according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures of the present invention are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
The first embodiment of the invention provides a coal-fired unit coal holographic recording environment-friendly system optimization method, which comprises the following steps:
s1, respectively collecting historical working condition data of the experimental object, and obtaining optimal parameters through the historical working condition data;
the experimental objects are electric precipitation parameters, desulfurization slurry circulating pump parameters and ash conveying air compressor combination parameters.
S2, acquiring actual parameters under actual working conditions on the basis of characteristic analysis of the actual working conditions;
s3, matching historical working conditions with actual working conditions, and acquiring optimal parameters under corresponding historical working conditions;
and S4, comparing the actual parameters with the optimal parameters, adjusting the parameters according to the comparison result, taking the load signals and the coal as fired parameters as closed-loop feedback control signals, and combining the holographic recording closed-loop control system to synchronously adjust the matching degree between the running condition of the environmental protection system and the load coal of the unit.
Aiming at the problems that the daily operation power consumption of an environment-friendly matched electric dust removal, desulfurization and ash conveying air compressor system of a coal-fired unit is high and manual adjustment experience cannot be quantized and standardized, the optimal parameter configuration of the environment-friendly system is obtained by collecting working condition data, the electric dust removal, desulfurization and ash conveying air compressor system of the unit is taken as an experimental object, a load signal and related parameters of coal as fired are taken as closed-loop feedback control signals, holographic input of coal as a factory is combined, parameters such as electric dust removal secondary current, slurry circulating pump combination, ash conveying air compressor operation number and the like are recommended according to working condition changes, operators synchronously follow and adjust, the matching of the operation condition of the environment-friendly system and the load coal of the unit is realized, energy conservation and consumption reduction are realized on the basis of the optimal combination of the system, and the operation reliability of equipment is improved.
The optimal parameters of the electric precipitation parameters comprise electric precipitation secondary parameters, coal ash content, total coal amount of a unit and electric precipitation plant power consumption rate which are acquired in historical months, and the optimal parameters I of electric precipitation secondary current are obtained through calculation Superior food The calculation formula of the recommendation table is as follows: i is Youyou (an instant noodle) Weighted average ash (%) × total coal amount (T/h) × 20, when I Fruit of Chinese wolfberry Deviation I Superior food >5% of the time, sending an alarm to adjust the secondary current of the electric precipitation, wherein I Fruit of Chinese wolfberry Is the actual value of the secondary current of electric precipitation.
In this embodiment, parameters such as secondary current of electric dust removal, ash content of coal, total coal amount of unit, power consumption rate of electric dust removal plant and the like in history of nearly three months are collected, and a corresponding coupling relationship is determined, so as to obtain a recommendation table of optimal parameters of electric dust removal parameters, as shown in table 1, the recommendation table is a recommendation table in which historical conditions corresponding to lowest plant power consumption rate and parameters corresponding to lowest power consumption rate are counted in data under historical conditions according to a back-up method, at this time, the optimal conditions (power consumption is minimum), and a calculation formula of the corresponding parameters at this time is obtained through back-up coupling, and is I Superior food And establishing 121 secondary current setting modes according to 121 sets of parameters in the recommended table.
TABLE 1
Example 2
A second embodiment of the invention, which is based on the previous embodiment.
The optimal parameters of the desulfurization slurry circulating pump parameters comprise that under different unit loads and the sulfur content of coal as fired, the total energy consumption of the slurry circulating pump is minimum on the basis of meeting the requirement of ultra-clean discharge of the SO2 discharge concentration at an outlet of an absorption tower through different slurry circulating pumps in combination (considering the output reduction condition of the slurry circulating pump after long-time operation, the flow equalizing condition of different circulating pumps, a reasonable PH value and the like), when the actual total sulfur content calculation value falls into a certain value of the total sulfur content, an alarm is given to perform combination adjustment of the slurry circulating pumps according to the corresponding total sulfur content value, and when the actual usage is performed, a worker needs to perform adjustment according to the SO2 discharge concentration at a chimney outlet.
Desulfurization slurry circulating pump is provided with a plurality ofly, and slurry circulating pump combination comprises two at least slurry circulating pumps, and a plurality of slurry circulating pumps are arranged by lower supreme, and power is by lower supreme gradual increase, sets up five circulating pumps of ABCDE in this embodiment, and its spray height determines the contact reaction time of flue gas and thick liquid, and the effect that different pump combination combinations reached is different, and different combination desulfurization efficiency are different during actual operation.
The following problems occur after the practical severity: 1. if the synergist is added into the absorption tower, the desulfurization efficiency of the absorption tower is changed from the prior art; 2. after the slurry circulating pump of the absorption tower runs for a long period, the efficiency of each circulating pump is changed due to abrasion of the steam decorations; 3. the desulfurization efficiency system receives the influence of desulfurization wastewater discharge performance, the chloride ion concentration is maintained at a high level, and a certain influence is also exerted on the efficiency of the absorption tower, and after the problems are corrected (according to historical parameters, the circulating pump combination is corrected to a high number, for example, two circulating pumps are needed sometimes, three circulating pumps are needed sometimes, and then three corresponding circulating pump combinations are selected during actual use) the recommendation table of the optimal parameters of the slurry circulating pump is obtained, as shown in table 2.
TABLE 2
Example 3
A third embodiment of the present invention, which is based on the previous embodiment.
The method comprises the steps of determining the upper limit of the average ash content of the coal fired by a unit to be 21% and the lower limit of the average ash content of the coal fired by the unit to be 8% by referring to the coal type checked by the unit and the coal blending list of the unit in nearly two years, calculating the total ash content entering electric dust removal of the unit according to the coal fired quantities (total coal quantities) corresponding to different loads, and determining the total ash content of the unit and determining the optimal parameters of the combined parameters of an ash conveying air compressor, wherein the optimal parameters comprise the total ash content of the unit and the unitThe number of the air compressors is determined, the total ash amount of the single unit is determined, the total ash amount of the unit entering the electric precipitation is calculated according to the coal burning amount corresponding to different loads, and the calculation formula is as follows:
wherein Gfh is total ash amount (T/h) of electric precipitation, B is total coal amount (T/h), A is average ash content (%) of coal as fired, eta is electric precipitation efficiency, eta is 99%, alpha is the ratio of ash in coal as fired to electric precipitation, and alpha is calculated according to 15% of dry slag system ratio after all coal as fired, and alpha is 85%.
The total ash quantity fluctuation range of a single unit set is 12-72(T/h) according to the formula, the number of the single air compressors is determined, the corresponding compressed air demand is calculated according to the total ash quantity of the electric precipitation, and the calculation formula is as follows:
wherein Q is the compressed air demand (m) 3 /min), Gfh is total ash amount (T/h) of electric precipitation, C is average ash-gas ratio, the reference design specification of the average ash-gas ratio is 13.9-26, the minimum value is 13.9, and rho is air density (kg/m) in a surface state 3 ) Rho is 1.293kg/m 3 T is the number of single ash conveying air compressors, W is the rated sulfur content of the single air compressor, and W is 65.3m 3 And/min, obtaining a recommendation table of optimal parameters of the number of ash conveying air compressors according to the total ash amount of the electric dust removal and the demand of compressed air, and sending an alarm to adjust the number of the ash conveying air compressors according to the corresponding total ash amount value when the actual total ash amount falls into a certain value of the total ash amount.
After the amount of coal ash entering a furnace is recorded, the total amount of ash is calculated in a built-in mode, the total amount of ash is compared with the amount of compressed air required by the amount of ash, the required number of ash conveying air compressors is obtained, and the following problems are found after the actual situation is serious: 1. the first electric field, the second electric field, the third electric field and the fourth electric field are arranged, all the electric fields are taken as a whole in the number of air compressor requirements calculated according to the ash-gas ratio in the early stage, the dust removal efficiency of the first electric field with the largest conveying output in the actual operation accounts for 90%, and the conveyed compressed air amount only accounts for 60% of the total compressed air amount (wherein the air consumption amount obtained by adding the second electric field, the third electric field and the fourth electric field and SCR ash conveying accounts for 40% of the total compressed air and is in clearance operation, and the short-time shutdown is further considered in the later stage under the premise that the ash content is controllable), so that an empirical coefficient of 1.65 needs to be multiplied; 2. at present, when the air storage tank, a pipeline along the way and a water discharging point on the site of conveying compressed air are damaged in winter mode operation, so that the empirical coefficient needs to be increased to 1.75 (the empirical coefficient can be removed in summer); 3. the gas consumption of the urea station is increased after the urea is changed from liquid ammonia to urea (intermittent use), so the empirical coefficient needs to be increased to 1.8.
In summary, the required compressed air amount is multiplied by 1.8 on the original basis, and because the logics of the two sets of units cannot be communicated with each other, the number of the air compressors of a single set is displayed to two digits after a decimal point, the single-machine demands are added when the two sets of units operate simultaneously, and the rounding value is used as the optimal parameter reference of the total number of the air compressors required, as shown in table 3.
TABLE 3
The load signal and the coal as fired parameter are taken as closed-loop feedback control signals, and the matching degree between the running condition of the environmental protection system and the load coal type of the unit is synchronously adjusted by combining a holographic input closed-loop control system.
The holographic recording closed-loop control system adjusts the secondary current of the electric dust removal through ash content and total coal quantity, adjusts the combination of slurry circulating pumps through sulfur quantity and total coal quantity, and adjusts the number of the single air compressors through total ash quantity.
The holographic input interface is shown in fig. 1, in the embodiment, ABCDEF mills are arranged, after an operator receives a coal type replacement instruction, characteristics of a newly replaced coal type are input 1 to 2 hours in advance, an alarm is given out after a built-in formula is calculated and compared with a recommended value, the operator is reminded to continue adjustment, and after the coal as fired is specified to be input, a single mill parameter recommended value is shown in a table 4.
TABLE 4
After the shift of operators, the coal varieties are confirmed according to a coal feeding list of as-fired coal, related parameters are input according to the coal feeding time, after the holographic input of as-fired coal is finished, built-in empirical parameters are compared with actual set parameters, an alarm is given out when the deviation exceeds a certain value, the secondary current of electric precipitation, the combination of a slurry circulating pump and the number of ash conveying air compressors are adjusted according to a recommendation table of optimal parameters, and after the time t, the holographic input closed-loop control system collects data again for comparison, the system which accords with the interval value of the recommendation table does not give an alarm any more, otherwise, the alarm is continuously given out for adjustment so as to form closed-loop control.
The optimization method of the environment-friendly system carries out data summation and optimization selection, combines a coal-as-fired holographic input function, embeds the energy-saving parameters which are judged manually into the system, reminds operators to adjust the energy-saving parameters, and further corrects the embedded parameters after tests to enable recommended values to accord with the actual operation function, so that the purposes of energy saving, consumption reduction and intelligent supervision are achieved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A coal-fired unit furnace coal holographic recording environmental protection system optimization method is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
respectively collecting historical working condition data of the experimental object, and obtaining optimal parameters through the historical working condition data;
acquiring actual parameters under actual working conditions on the basis of characteristic analysis of the actual working conditions;
matching historical working conditions with actual working conditions to obtain optimal parameters under corresponding historical working conditions;
comparing the actual parameters with the optimal parameters, and adjusting the parameters according to the comparison result;
and taking the load signal and the coal as a closed-loop feedback control signal, and combining a holographic recording closed-loop control system to synchronously adjust the matching degree between the running condition of the environmental protection system and the load coal of the unit.
2. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 1, characterized in that: the experimental objects are electric precipitation parameters, desulfurization slurry circulating pump combination parameters and ash conveying air compressor combination parameters.
3. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 2, characterized in that: the optimal parameters of the electric precipitation parameters comprise electric precipitation secondary parameters, coal ash, total coal amount of a unit and electric precipitation plant power consumption rate which are obtained by collecting historical months, and the optimal parameters I of electric precipitation secondary current are obtained through calculation Superior food The calculation formula of the recommendation table is as follows: i is Youyou (an instant noodle) Weighted average ash x total coal amount x 20, when I Fruit of Chinese wolfberry Deviation I Superior food >5% of the time, sending an alarm to adjust the secondary current of the electric precipitation, wherein I Fruit of Chinese wolfberry The actual value of the secondary current of the electric precipitation is obtained.
4. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 3, characterized in that: the optimal parameters of the combined parameters of the desulfurization slurry circulating pump comprise that under different unit loads and coal-as-fired sulfur contents, on the basis that the sulfur dioxide emission concentration at the outlet of the absorption tower meets ultra-clean emission, the total energy consumption of the slurry circulating pump is minimum, according to the total sulfur content which is the coal-as-fired sulfur content multiplied by the total coal content of the unit, and a recommended table of the optimal parameters of the sulfur slurry circulating pump is obtained through different slurry circulating pump combinations, and when the actual calculated value of the total sulfur content is in a certain value of the total sulfur content, an alarm is given to perform combined adjustment on the slurry circulating pump according to the corresponding total sulfur content value.
5. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 4, characterized in that: the desulfurization slurry circulating pump is provided with a plurality of, the slurry circulating pump combination comprises two at least slurry circulating pumps, and is a plurality of the slurry circulating pump is arranged from bottom to top, and the power is gradually increased from bottom to top.
6. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 5, characterized in that: the optimal parameters of the ash conveying air compressor combination parameters comprise the total ash amount of a single unit and the number of the single air compressors, the total ash amount of the single unit is determined by calculating the total ash amount of the unit entering the electric precipitation according to the coal combustion amount corresponding to different loads, and the calculation formula is as follows:
wherein Gfh is total ash content of electric precipitation, B is total coal content, A is average ash content of coal entering a furnace, eta is electric precipitation efficiency, and alpha is the ratio of ash content in coal to electric precipitation.
7. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 6, characterized in that: the determining of the number of the single air compressors comprises calculating corresponding compressed air demand according to the total ash amount of the electric precipitation, and the calculation formula is as follows:
wherein Q is the compressed air demand (m) 3 /min), Gfh is total ash amount (T/h) of electric precipitation, C is average ash-gas ratio, and rho is air density in a surface state (kg/m) 3 ) T is the number of the single ash conveying air compressors, W is the rated sulfur content of the single air compressor, and the total ash is collected according to electric precipitationAnd (3) obtaining a recommendation table of the optimal parameters of the number of ash conveying air compressors by the quantity and the required quantity of the compressed air, and sending an alarm to adjust the number of the ash conveying air compressors according to the corresponding total ash quantity value when the actual total ash quantity falls into a certain interval of the total ash quantity.
8. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of any one of claims 1 to 7, characterized in that: the load signal and the coal as fired parameter are taken as closed-loop feedback control signals, and the matching degree between the running condition of the environmental protection system and the unit load coal type is synchronously adjusted by combining the holographic input closed-loop control system.
9. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 8, characterized in that: the holographic recording closed-loop control system adjusts the secondary current of the electric dust removal through ash content and total coal quantity, adjusts the combination of slurry circulating pumps through sulfur quantity and total coal quantity, and adjusts the number of the single air compressors through total ash quantity.
10. The coal-fired unit furnace coal holographic recording environmental protection system optimization method of claim 9, characterized in that: the holographic input closed-loop control system comprises a coal variety confirmed according to a coal feeding list of as-fired coal, and simultaneously, parameters are input according to coal feeding time, after the holographic input of as-fired coal is finished, built-in empirical parameters are compared with actual set parameters, an alarm is given out when deviation exceeds a certain value, electric precipitation secondary current, a slurry circulating pump combination and ash conveying air compressor number are adjusted according to a recommendation table of optimal parameters, and after t time, the holographic input closed-loop control system collects data again for comparison, the system which accords with the interval value of the recommendation table does not give an alarm any more, and otherwise, the system continues to give an alarm for adjustment to form closed-loop control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210419962.5A CN114895555B (en) | 2022-04-20 | 2022-04-20 | Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210419962.5A CN114895555B (en) | 2022-04-20 | 2022-04-20 | Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114895555A true CN114895555A (en) | 2022-08-12 |
| CN114895555B CN114895555B (en) | 2023-11-03 |
Family
ID=82717367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210419962.5A Active CN114895555B (en) | 2022-04-20 | 2022-04-20 | Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114895555B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727107A (en) * | 2023-05-12 | 2023-09-12 | 江苏南通发电有限公司 | Method for controlling ash removal emission |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919623A (en) * | 1995-07-07 | 1997-01-21 | Babcock Hitachi Kk | Wet type waste gas desulfurizing method and device therefor |
| CN106323825A (en) * | 2016-10-26 | 2017-01-11 | 浙江大学 | Pipeline powdered coal particle size measuring device and measuring method |
| CN110989360A (en) * | 2019-12-23 | 2020-04-10 | 武汉博晟信息科技有限公司 | Thermal power generating unit steady-state history optimizing method based on full data |
| CN113050559A (en) * | 2021-03-09 | 2021-06-29 | 浙江菲达环保科技股份有限公司 | Coal-fired power plant desulfurization system and electric precipitation system cooperative control method and system |
| CN113919177A (en) * | 2021-10-28 | 2022-01-11 | 西安热工研究院有限公司 | Energy-saving potential evaluation method and system suitable for wet desulphurization system of coal-fired power plant |
| CN113976323A (en) * | 2021-09-10 | 2022-01-28 | 华能曲阜热电有限公司 | Multi-signal optimization energy-saving electric precipitation control method |
| CN113976322A (en) * | 2021-10-29 | 2022-01-28 | 西安热工研究院有限公司 | Energy-saving potential evaluation method and system suitable for coal-fired power plant electric precipitation system |
-
2022
- 2022-04-20 CN CN202210419962.5A patent/CN114895555B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919623A (en) * | 1995-07-07 | 1997-01-21 | Babcock Hitachi Kk | Wet type waste gas desulfurizing method and device therefor |
| CN106323825A (en) * | 2016-10-26 | 2017-01-11 | 浙江大学 | Pipeline powdered coal particle size measuring device and measuring method |
| CN110989360A (en) * | 2019-12-23 | 2020-04-10 | 武汉博晟信息科技有限公司 | Thermal power generating unit steady-state history optimizing method based on full data |
| CN113050559A (en) * | 2021-03-09 | 2021-06-29 | 浙江菲达环保科技股份有限公司 | Coal-fired power plant desulfurization system and electric precipitation system cooperative control method and system |
| CN113976323A (en) * | 2021-09-10 | 2022-01-28 | 华能曲阜热电有限公司 | Multi-signal optimization energy-saving electric precipitation control method |
| CN113919177A (en) * | 2021-10-28 | 2022-01-11 | 西安热工研究院有限公司 | Energy-saving potential evaluation method and system suitable for wet desulphurization system of coal-fired power plant |
| CN113976322A (en) * | 2021-10-29 | 2022-01-28 | 西安热工研究院有限公司 | Energy-saving potential evaluation method and system suitable for coal-fired power plant electric precipitation system |
Non-Patent Citations (1)
| Title |
|---|
| 侯铂: "电除尘系统优化配置及智能化改造", 吉林电力, no. 04 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727107A (en) * | 2023-05-12 | 2023-09-12 | 江苏南通发电有限公司 | Method for controlling ash removal emission |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114895555B (en) | 2023-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105020845A (en) | Linkage energy-saving control system and method for air conditioning system | |
| CN104329281B (en) | A kind of adjusting rotor blade formula air-introduced machine frequency conversion energy-saving system | |
| CN111375302A (en) | Wet desulphurization energy-saving control method and system | |
| CN109126408A (en) | A kind of wet desulphurization device and intelligent control method | |
| CN114895555A (en) | Coal-fired unit furnace coal holographic input environmental protection system optimization method | |
| CN109173631B (en) | Energy-saving optimization method of series double-tower flue gas desulfurization system | |
| CN113457402A (en) | Efficient composite slurry supply method for desulfurizing tower | |
| CN114749006A (en) | Method for optimizing wet desulphurization slurry circulating pump | |
| CN104959015A (en) | Flue gas desulphurization automatic control system capable of realizing thorough emission of flue gas and desulphurization method | |
| CN107648988B (en) | Device and method for adjusting desulfurization slurry supply flow through double loops | |
| CN104747453B (en) | Two-stage screw compressor discharge pressure stabilizing device and two-stage screw compressor discharge pressure stabilizing method | |
| CN111338409A (en) | Universal desulfurization dust removal energy-saving optimization control system | |
| CN114281042A (en) | Energy-saving control method and device for wet desulphurization circulating system | |
| CN111408243B (en) | Wet desulfurization pH value control system and method for thermal power generating unit | |
| CN111330316A (en) | Thermal power plant limestone-wet flue gas desulfurization defoaming method based on desulfurization defoaming agent | |
| CN204746081U (en) | Can realize flue gas desulfurization automatic controls of ultra -clean emission | |
| US6293787B1 (en) | Method of regulating the flue gas temperature and voltage supply in an electrostatic precipitator for a cement production plant | |
| CN113593653A (en) | Method for optimally controlling overall economic benefits of wet desulphurization device | |
| CN112569760A (en) | Wet desulphurization adjustment slurry supply method | |
| RU2004114846A (en) | METHOD FOR OPTIMIZING OPERATION OF MULTIPLE COMPRESSOR UNITS OF COMPRESSOR STATION OF NATURAL GAS | |
| CN112999857A (en) | Regulation and control method and regulation and control system for wide-load limestone slurry supply system | |
| CN209879328U (en) | Ultra-low emission desulfurization energy-saving operation system based on sulfur overall process monitoring | |
| CN110260431B (en) | Control method of air conditioning system of textile workshop | |
| CN113019086B (en) | Precise feeding method of desulfurization synergist | |
| CN209020156U (en) | A kind of wet desulphurization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |