CN114895555B - Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace - Google Patents
Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace Download PDFInfo
- Publication number
- CN114895555B CN114895555B CN202210419962.5A CN202210419962A CN114895555B CN 114895555 B CN114895555 B CN 114895555B CN 202210419962 A CN202210419962 A CN 202210419962A CN 114895555 B CN114895555 B CN 114895555B
- Authority
- CN
- China
- Prior art keywords
- coal
- total
- ash
- parameters
- dust removal
- 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.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005457 optimization Methods 0.000 title claims description 8
- 239000000428 dust Substances 0.000 claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 47
- 230000007613 environmental effect Effects 0.000 claims abstract description 17
- 238000005265 energy consumption Methods 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 239000002956 ash Substances 0.000 claims description 91
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 38
- 239000011593 sulfur Substances 0.000 claims description 38
- 229910052717 sulfur Inorganic materials 0.000 claims description 38
- 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
- 238000001556 precipitation Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000010883 coal ash Substances 0.000 claims description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims 2
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000012905 input function Methods 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 20
- 239000007789 gas Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000012937 correction Methods 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
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 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
- 239000002351 wastewater Substances 0.000 description 1
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]
Abstract
The application discloses a method for optimizing a coal holographic entry environmental protection system of a coal-fired unit, 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 based on actual working condition characteristic analysis, 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 the parameters according to a comparison result, taking a load signal and an in-furnace coal parameter as closed-loop feedback control signals, and synchronously adjusting the matching degree between the running condition of the environmental protection system and the load coal of the unit by combining a holographic entry closed-loop control system. According to the application, the holographic input function of the factory coal is combined, the secondary electric current of the electric dust removal, the slurry circulating pump combination and the running number parameters of the ash conveying air compressor are recommended according to the working condition change, and then the running personnel synchronously follow and adjust the parameters, so that the matching of the running condition of the environment-friendly system and the load coal type of the unit is realized, and the energy conservation and consumption reduction are realized on the basis of the optimal combination of the system.
Description
Technical Field
The application relates to the technical field, in particular to a method for optimizing a coal holographic entry environment-friendly system of a coal-fired unit.
Background
Some S power plant 1050MW coal-fired unit is through ultra-clean emission transformation in 2016, after transformation electric dust removal system power consumption, desulfurization thick liquid circulating pump power consumption, ash conveying air compressor machine power consumption are reduced to some extent after the adjustment, but still there is the short board that needs the operating personnel to adjust electric dust removal secondary current, thick liquid circulating pump combination, air compressor machine total amount according to information such as load, coal types, operation experience to the operating personnel is to on-the-spot different cognition and different processing means lead to each group adjustment uneven, S power plant unit relevant parameter relies on manual intervention to become hysteresis at present: 1. s, the power plant is arranged at the inlet of the induced draft fan, two three-chamber four-power plant electrostatic precipitators are arranged, the first 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 an operator manually inputs parameters such as secondary current limit, charging ratio and the like on the basis of considering ultra-clean emission according to unit load and coal ash entering the furnace, so that the control of electric precipitation is realized; 2. the S factory desulfurization system adopts limestone-gypsum wet flue gas desulfurization technology, one furnace is provided with one tower unit, 5 centrifugal slurry circulating pumps are arranged in total, 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 unit load and the sulfur content change at the inlet of the absorption tower so as to meet the emission standard; 3. s factory fly ash is conveyed by adopting a positive pressure concentrated phase pneumatic conveying mode, an electric field of each dust remover of each furnace is provided with an ash pipe, two electric fields of the second electric field, the third electric field and the fourth electric field share one ash pipe, an SCR (selective catalytic reduction) ash inlet hopper is provided with one ash pipe, 6 screw conveying air compressors and 6 freeze dryers are arranged in total for two units, an operator manually starts and stops the conveying air compressors according to unit loads, furnace ash entering and ash conveying pressure, and energy conservation is realized on the premise of meeting conveying pressure.
In summary, the defects of uneven system adjustment according to the experience level of people, relative lag of adjustment and no closed loop feedback are overcome in the energy saving of the environmental protection system, and based on the defects, the optimization method of the holographic entry environmental protection system for the coal of the coal-fired unit is provided to solve the problems.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above and/or problems associated with the environmental design of existing coal-fired units.
Therefore, one of the purposes of the application is to provide an optimization method of the environmental protection system by holographic entry of the coal-fired unit furnace, which obtains the optimal parameter configuration of the environmental protection system according to the observation statistics by collecting the historical working condition data, namely, the environmental protection system is in the time period with the lowest energy consumption at the moment, and then parameter adjustment is carried out manually according to the optimal parameter so as to reduce the overall energy consumption.
In order to achieve the above effects, the present application provides the following technical solutions: the 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 the actual working conditions based on the characteristic analysis of the actual working conditions, matching the historical working conditions with the actual working conditions, obtaining optimal parameters under the corresponding historical working conditions, comparing the actual parameters with the optimal parameters, adjusting the parameters according to comparison results, taking load signals and coal-in parameters as closed-loop feedback control signals, and synchronously adjusting the matching degree between the running condition of the environmental protection system and the load coal types of the unit by combining the holographic input closed-loop control system.
As a preferred embodiment of the present application, wherein: the experimental object is an electric dust removal parameter, a desulfurization slurry circulating pump parameter and an ash conveying air compressor combination parameter.
As a preferred embodiment of the present application, wherein: the optimal parameters of the electric dust removal parameters comprise electric dust removal secondary parameters, coal ash, unit total coal quantity and electric dust removal plant power consumption through collection of historical months, and the optimal parameters I of electric dust removal secondary current are obtained through calculation Excellent (excellent) The calculation formula is as follows: i Excellent (excellent) Weight average ash x total coal amount x 20, when I Real world Deviation I Excellent (excellent) >At 5%, an alarm is sent out to adjust the secondary current of the electric dust removal, wherein I Real world The actual value of the secondary current of the electric dust removal.
As a preferred embodiment of the present application, wherein: the optimal parameters of the desulfurization slurry circulating pump parameters comprise that under different unit loads and sulfur content of the coal in the furnace, on the basis of meeting the requirement of the SO2 emission concentration at the outlet of the absorption tower and meeting the ultra-clean emission, the total energy consumption of the slurry circulating pump is minimum, and according to the total sulfur content = sulfur content of the coal in the furnace and the total coal content of the unit, and the recommended table of the optimal parameters of the sulfur slurry circulating pump is obtained through different slurry circulating pump combinations, when the actual total sulfur content calculated value falls to a certain value of the total sulfur content, an alarm is sent out to adjust the slurry circulating pump according to the corresponding total sulfur content value.
As a preferred embodiment of the present application, wherein: the desulfurization slurry circulating pumps are arranged in a plurality, the slurry circulating pump combination is composed of at least two slurry circulating pumps, the slurry circulating pumps are arranged from bottom to top, and the power of the slurry circulating pumps is gradually increased from bottom to top.
As a preferred embodiment of the present application, wherein: the optimal parameters of the ash conveying air compressor combination parameters comprise the total ash quantity of a single unit and the number of single air compressors, the total ash quantity of the single unit is determined by the total ash quantity of the electric precipitation entering into the electric precipitation unit according to the coal-fired quantity computer units corresponding to different loads, and the calculation formula is as follows:wherein Gfh is the total ash content of the electric dust removal, B is the total coal content, A is the average ash content of the coal in the furnace, eta is the electric dust removal efficiency, and alpha is the ratio of the ash content in the coal to the electric dust removal.
As a preferred embodiment of the present application, wherein: the method comprises the steps of determining the number of the single air compressors, calculating the corresponding compressed air demand according to the total ash amount of the electric precipitation, wherein the calculation formula is as follows:wherein Q is the compressed air demand (m 3 Gfh is total ash amount (T/h), C is average ash-to-gas ratio, ρ is air density (kg/m) in the surface state 3 ) T is the number of single ash conveying air compressors, W is the rated sulfur content of the single air compressors, and the method is based on electricityAnd when the actual total ash quantity falls into a certain value of the total ash quantity, an alarm is sent out to adjust the number of the air compressors of the ash conveyor according to the corresponding total ash quantity value.
As a preferred embodiment of the present application, wherein: the method is characterized in that load signals and coal parameters fed into a furnace are used as closed-loop feedback control signals, the holographic recording closed-loop control system is combined to synchronously adjust the matching degree between the running condition of an environmental protection system and the load coal types of a unit, the ash and sulfur are respectively input according to different coal types, the total ash and total sulfur are calculated according to the holographic recording closed-loop control system, the total ash = ash x total coal, the total sulfur = sulfur x total coal, and the total coal is obtained through coal mill outlet flow.
As a preferred embodiment of the present application, wherein: the holographic recording closed-loop control system adjusts secondary current of electric dust removal through ash content and total coal quantity, adjusts slurry circulation pump combination through sulfur quantity and total coal quantity, and adjusts the number of single air compressors through total ash quantity.
As a preferred embodiment of the present application, wherein: the holographic recording closed-loop control system comprises a step of confirming the variety of coal according to a coal feeding bill of the coal feeding, a step of recording parameters according to the coal feeding time, a step of comparing built-in experience parameters with actual setting parameters after the holographic recording of the coal feeding is finished, a step of giving an alarm when the deviation exceeds a certain value, a step of adjusting the secondary electric current of electric dust removal, a step of combining a slurry circulating pump and a step of ash conveying air compressor according to a recommended table of optimal parameters, a step of comparing data acquired again by the holographic recording closed-loop control system after t time, and a step of avoiding alarming when the system conforming to the interval value of the recommended table is not used, otherwise, continuing to give an alarm to adjust to form closed-loop control.
The application has the beneficial effects that: according to the application, the holographic input function of the factory coal is combined, the secondary electric current of electric dust removal, the slurry circulating pump combination and the running number parameters of the ash conveying air compressor are recommended according to the working condition change, and then the running personnel synchronously follow and adjust, so that the matching of the running condition of the environment-friendly system and the load coal type of the unit is realized, the energy conservation and consumption reduction are realized on the basis of the optimal combination of the system, and the running reliability of equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a graph of average parameter input window for multiple mill furnace according to the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. 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 application provides a method for optimizing a coal holographic entry environment-friendly system of a coal-fired unit, which comprises the following steps:
s1, respectively acquiring historical working condition data of an experimental object, and obtaining optimal parameters through the historical working condition data;
the experimental object is an electric dust removal parameter, a desulfurization slurry circulating pump parameter and an ash conveying air compressor combination parameter.
S2, acquiring actual parameters under actual working conditions based on the analysis of the characteristics of the actual working conditions;
s3, matching the historical working condition with the actual working condition to obtain an optimal parameter under the corresponding historical working condition;
s4, comparing the actual parameters with the optimal parameters, adjusting the parameters according to the comparison result, taking the load signal and the coal-in-furnace parameters as closed-loop feedback control signals, and synchronously adjusting the matching degree between the running condition of the environmental protection system and the load coal types of the unit by combining the holographic recording closed-loop control system.
Aiming at the problems that the daily operation electricity consumption of a coal-fired unit environment-friendly matched electric dust removal, desulfurization and ash conveying air compressor system is high, and manual adjustment experience cannot be quantified and standardized, the optimal parameter configuration of the environment-friendly system is obtained by collecting working condition data, the unit electric dust removal, desulfurization and ash conveying air compressor system is taken as an experimental object, the load signal and the relevant parameters of the coal in a furnace are taken as closed-loop feedback control signals, the coal in a factory is combined to be subjected to holographic recording, parameters such as electric dust removal secondary current, slurry circulating pump combination and ash conveying air compressor operation number are recommended according to working condition change, and operators synchronously follow and adjust, so that the operation condition of the environment-friendly system is matched with the load coal of the unit, energy conservation and consumption reduction are realized on the basis of optimal combination of the re-system, and meanwhile the reliability of equipment operation is improved.
The optimal parameters of the electric dust removal parameters comprise electric dust removal secondary parameters, coal ash, unit total coal quantity and electric dust removal plant power consumption through collecting historical months, and the optimal parameters I of electric dust removal secondary current are obtained through calculation Excellent (excellent) The calculation formula is as follows: i Excellent (excellent) =weighted average ash (%) ×total coal amount (T/h) ×20, when I Real world Deviation I Excellent (excellent) >At 5%, an alarm is sent out to adjust the secondary current of the electric dust removal, wherein I Real world The actual value of the secondary current of the electric dust removal.
In this embodiment, parameters such as electric dust removal secondary current, coal ash, total coal amount of a unit, electric dust removal plant power consumption and the like of the past three months are collected, and corresponding coupling relations are determined, so that a recommended table of optimal parameters of electric dust removal parameters is obtained, and in the recommended table, a backward method is used in the past worker, as shown in table 1In the data under the condition, the historical working condition corresponding to the lowest station service electricity consumption and the parameter corresponding to the lowest station service electricity consumption are counted, the optimal condition (the lowest electricity consumption) is obtained at the moment, and the calculation formula of the corresponding parameter at the moment is obtained through reverse coupling, namely I Excellent (excellent) And establishing 121 secondary current setting modes according to 121 groups of parameters in the recommendation table.
TABLE 1
Example 2
A second embodiment of the application, which is based on the previous embodiment.
The optimal parameters of the desulfurization slurry circulating pump parameters comprise that under different unit loads and sulfur content of the coal in the furnace, by means of different slurry circulating pump combinations (the condition of output reduction after the slurry circulating pump operates for a long time, the condition of current sharing of different circulating pumps, a reasonable PH value and the like are considered), on the basis that the SO2 emission concentration at the outlet of the absorption tower meets the ultra-clean emission, the total energy consumption of the slurry circulating pump is minimum, according to total sulfur content (t/h) =the sulfur content of the coal in the furnace x the total coal content of the unit, and a recommended table of the optimal parameters of the sulfur slurry circulating pump is obtained by means of different slurry circulating pump combinations, when the actual total sulfur content calculated value falls to a certain value of the total sulfur content, an alarm is sent out to adjust the slurry circulating pump combination according to the corresponding total sulfur content value, and when in practical use, staff need to adjust the SO2 emission concentration at the outlet of a chimney.
The desulfurization slurry circulating pump is provided with a plurality of, and the slurry circulating pump combination comprises two at least slurry circulating pumps, and a plurality of slurry circulating pumps are arranged from bottom to top, and power is progressively increased from bottom to top, sets up five circulating pumps of ABCDE in this embodiment, and its spray height decides the contact reaction time of flue gas and thick liquid, and different pump combinations reach the effect different, and different combinations desulfurization efficiency is different when actually running.
The following problems are caused after the actual serious operation: 1. if the synergist is added into the absorption tower, the desulfurization efficiency is changed compared with the prior art; 2. after the slurry circulating pump of the absorption tower runs for a long period, the steam decoration wear changes the efficiency of each circulating pump; 3. the desulfurization efficiency system receives the influence of desulfurization wastewater discharge performance, the concentration of chloride ions is maintained at a high level, and the efficiency of the absorption tower is also influenced to a certain extent, after the problems are corrected (the correction is performed according to the historical parameters, the correction is performed to a high number by using the combination of circulation pumps, if two circulation pumps are needed and three circulation pumps are needed sometimes, and then three corresponding combination of circulation pumps are selected during actual use), a recommended table of the optimal parameters of the slurry circulation pump is obtained, as shown in table 2.
TABLE 2
Example 3
A third embodiment of the application is based on the previous embodiment.
The method comprises the steps of referring to a unit check coal type and a unit near two-year coal blending list, determining that the unit coal-fired average ash limit is 21%, the unit coal-fired average ash limit is 8%, calculating the total ash amount of the unit entering electric precipitation according to the coal-fired amounts (total coal amounts) corresponding to different loads, determining the total ash amount of the unit and the number of the single air compressors, and determining the total ash amount of the unit according to the total ash amount of the unit entering electric precipitation according to the coal-fired amounts corresponding to different loads, wherein the calculation formula is as follows:
wherein Gfh is total ash amount (T/h) of electric dust removal, B is total coal amount (T/h), A is average ash content (%) of coal entering a furnace, eta is electric dust removal efficiency, eta is 99%, alpha is the ratio of ash content in coal entering the electric dust removal, and alpha is 85% calculated according to the ratio of 15% of ash content entering a dry slag system after all coal is burnt out.
The fluctuation range of the total ash amount of the single unit is 12-72 (T/h) from the formula, the determination of the number of the single air compressors comprises the calculation of the corresponding compressed air demand amount 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 Per min), gfh is total ash amount (T/h) of electric precipitation, C is average ash-to-gas ratio, the average ash-to-gas ratio refers to 13.9-26, the minimum value of 13.9 is taken, and ρ is air density (kg/m) under the state of table 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 compressors, and W is 65.3m 3 And/min, obtaining a recommended table of the optimal parameters of the number of the ash conveying air compressors according to the total ash amount of the electric precipitation and the compressed air demand amount, and sending out an alarm to adjust the number of the ash conveying air compressors according to the corresponding total ash amount when the actual total ash amount falls into a certain value of the total ash amount.
After the input coal ash amount is input, the total ash amount is calculated internally, and compared with the compressed air amount required by the ash amount, the required number of ash conveying air compressors is obtained, and the following problems are found after actual serious: 1. the first electric field, the second electric field, the third electric field and the fourth electric field are arranged, the required number of the air compressors calculated according to the ash-gas ratio at the early stage is taken into consideration, all electric fields are taken as a whole, the first electric field with the largest actual operation delivery output has 90% of dust removal efficiency, the delivered compressed air quantity only accounts for 60% of the total compressed air quantity (the air consumption added by the second electric field, the third electric field and the fourth electric field and SCR ash delivery accounts for 40% of the total compressed air and is in intermittent operation, short-time shutdown is further considered on the premise of controllable ash content at the later stage), and therefore the air compressor is required to be multiplied by an empirical coefficient of 1.65; 2. when the current winter mode is operated, the on-site air storage tank for conveying compressed air, the on-way pipeline and the tie-off point have loss, so that the experience coefficient needs to be increased to 1.75 (the air storage tank can be removed in summer); 3. after the liquid ammonia is changed into urea, the gas consumption of a urea station is increased (intermittent use), so that the empirical coefficient needs to be increased to 1.8.
In summary, the required compressed air quantity is multiplied by 1.8 on the basis of the original condition, and because the logics of the two units cannot be mutually communicated, the number of air compressors of a single unit is displayed to be two after a decimal point, and when the two units run simultaneously, the single machine requirement is added, and the value is rounded off to be used as the optimal parameter reference of the total air compressor requirement number, as shown in table 3.
TABLE 3 Table 3
The load signal and the coal parameters fed into the furnace are taken as closed-loop feedback control signals, the holographic recording closed-loop control system is combined to synchronously adjust the matching degree between the running condition of the environmental protection system and the load coal types of the unit, the ash and the sulfur are respectively input according to different coal types, the total ash and the total sulfur are calculated according to the holographic recording closed-loop control system, the total ash = ash x the total coal, the total sulfur = the sulfur x the total coal, and the total coal is obtained through the outlet flow of the coal mill.
The holographic recording closed-loop control system adjusts secondary current of electric dust removal through ash content and total coal quantity, adjusts slurry circulating pump combination through sulfur content and total coal quantity, and adjusts the number of single air compressors through total ash quantity.
The holographic input interface is shown in fig. 1, in this embodiment, there are ABCDEF mills, when the operator receives the coal replacement instruction, inputs the characteristics of the new coal to be replaced 1 to 2 hours in advance, calculates the built-in formula, compares the calculated formula with the recommended value, and gives an alarm to remind the operator to continue adjustment, and when the input of the coal is designated, the recommended value of the single mill parameter is shown in table 4.
TABLE 4 Table 4
After the operator receives the shift, the variety of the coal is confirmed according to the coal feeding list of the coal feeding, meanwhile, relevant parameters are input according to the coal feeding time, after the holographic input of the coal feeding is finished, built-in experience parameters are compared with actual setting parameters, an alarm is sent out when the deviation exceeds a certain value, meanwhile, the secondary electric current of electric dust removal, the slurry circulating pump combination and the number of ash conveying air compressors are adjusted according to a recommended table of optimal parameters, after t time, the holographic input closed-loop control system acquires data again for comparison, a system conforming to the interval value of the recommended table is not alarmed, otherwise, the system continues to send out an alarm for adjustment so as to form closed-loop control.
The optimization method of the environment-friendly system performs data sub-o and optimization selection, combines the holographic input function of the coal into the furnace, embeds the energy-saving parameters which are manually judged in the past into the system, reminds operators to adjust, and further corrects the built-in parameters after the experiment so that the recommended value accords with the actual operation function, thereby achieving the purposes of energy saving, consumption reduction and intelligent monitoring.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (3)
1. The optimizing method of the holographic entry environmental protection system of the coal-fired unit furnace is characterized by comprising the following steps of: comprising the steps of (a) a step of,
respectively collecting historical working condition data of an experimental object, and obtaining optimal parameters through the historical working condition data;
the experimental object is an electric dust removal parameter, a desulfurization slurry circulating pump combination parameter and an ash conveying air compressor combination parameter;
the optimal parameters of the electric dust removal parameters comprise electric dust removal secondary parameters, coal ash, unit total coal quantity and electric dust removal plant power consumption through collecting historical months, and the optimal parameters I of electric dust removal secondary current are obtained through calculation Excellent (excellent) The calculation formula is as follows: i Excellent (excellent) Weight average ash x total coal amount x 20, when I Real world Deviation I Excellent (excellent) >At 5%, an alarm is sent out to adjust the secondary current of the electric dust removal, wherein I Real world The actual value of the secondary current of the electric dust removal;
the optimal parameters of the desulfurization slurry circulating pump combination parameters comprise that under different unit loads and sulfur content of the coal in the furnace, on the basis of meeting the requirement of ultra-clean emission of sulfur dioxide emission concentration at the outlet of an absorption tower, the total energy consumption of the slurry circulating pump is minimum, according to total sulfur content = sulfur content of the coal in the furnace x 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, when an actual total sulfur content calculated value falls to a certain value of total sulfur content, an alarm is sent out to carry out slurry circulating pump combination adjustment according to the corresponding total sulfur content value;
the desulfurization slurry circulating pumps are arranged in a plurality, the slurry circulating pump combination consists of at least two slurry circulating pumps, and the slurry circulating pumps are arranged from bottom to top and the power of the slurry circulating pumps is gradually increased from bottom to top;
the optimal parameters of the combined parameters of the ash conveying air compressors comprise the total ash quantity of the single unit and the number of the single air compressors, wherein the total ash quantity of the single unit is determined by the total ash quantity of the electric dust collector entering the electric dust collector according to the coal-fired quantity computer units corresponding to different loads, and the calculation formula is as follows:
wherein Gfh is the total ash content of the electric dust removal, B is the total coal content, A is the average ash content of the coal in the furnace, eta is the electric dust removal efficiency, and alpha is the ratio of the ash content in the coal to the electric dust removal;
based on the characteristic analysis of the actual working condition, acquiring actual parameters under the actual working condition;
matching the historical working condition with the actual working condition to obtain an optimal parameter under the corresponding historical working condition;
comparing the actual parameters with the optimal parameters, performing parameter adjustment according to the comparison result, taking the load signal and the coal-in-furnace parameters as closed-loop feedback control signals, and synchronously adjusting the matching degree between the running condition of the environmental protection system and the load coal types of the unit by combining the holographic recording closed-loop control system;
the holographic recording closed-loop control system adjusts secondary current of electric dust removal through ash content and total coal content, adjusts slurry circulating pump combination through sulfur content and total coal content, and adjusts the number of single air compressors through total ash content;
the holographic recording closed-loop control system comprises a step of confirming the variety of coal according to a coal feeding bill of the coal fed into the furnace, a step of recording parameters according to the coal feeding time, a step of comparing built-in experience parameters with actual setting parameters after the holographic recording of the coal fed into the furnace is finished, a step of giving an alarm when the deviation exceeds a certain value, a step of adjusting the secondary electric current of electric dust removal, the combination of slurry circulating pumps and the number of ash conveying air compressors according to a recommended table of optimal parameters, and a step of comparing data acquired by the holographic recording closed-loop control system again after t time, wherein the system conforming to the interval value of the recommended table does not give an alarm any more, and otherwise, the system continues to give an alarm to be adjusted to form closed-loop control.
2. The optimization method of the coal holographic entry environmental protection system of the coal-fired unit furnace coal is characterized by comprising the following steps: the method comprises the steps of determining the number of the single air compressors, calculating the corresponding compressed air demand according to the total ash amount of the electric precipitation, wherein the calculation formula is as follows:
wherein Q is the compressed air demand (m 3 Gfh is total ash amount (T/h), C is average ash-to-gas ratio, ρ is air density (kg/m) in the surface state 3 ) T is the number of single ash conveying air compressors, W is the rated sulfur quantity of the single air compressors, a recommended table of the optimal parameters of the number of the ash conveying air compressors is obtained according to the total ash quantity of electric precipitation and the compressed air demand quantity, and when the actual total ash quantity falls into a certain section of the total ash quantity, an alarm is sent out to adjust the number of the ash conveying air compressors according to the corresponding total ash quantity value.
3. The optimization method of the coal holographic entry environmental protection system of the coal-fired unit furnace coal is characterized by comprising the following steps: the method is characterized in that load signals and coal parameters entering a furnace are used as closed-loop feedback control signals, the holographic recording closed-loop control system is combined to synchronously adjust the matching degree between the running condition of the environmental protection system and the load coal types of the unit, the ash and sulfur are respectively input according to different coal types, the total ash and total sulfur are calculated according to the holographic recording closed-loop control system, and the total coal is obtained through the outlet flow of the coal mill.
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 CN114895555A (en) | 2022-08-12 |
| CN114895555B true 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) |
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 |
| 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 |
| 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 |
-
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 |
|---|
| 电除尘系统优化配置及智能化改造;侯铂;吉林电力(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114895555A (en) | 2022-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105020845B (en) | A kind of air-conditioning system linkage energy-saving control system and method | |
| CN103994553B (en) | A kind of refrigeration system cooling water energy-saving control method, system and device | |
| CN111375302A (en) | Wet desulphurization energy-saving control method and system | |
| CN103306958A (en) | Running Method method of running of intelligent power-saving control system of air compression station | |
| CN204902127U (en) | Terminal coordinated control's of air conditioner water system and air conditioner economizer | |
| CN109173631B (en) | Energy-saving optimization method of series double-tower flue gas desulfurization system | |
| CN111807060A (en) | Positive-pressure concentrated-phase pneumatic ash conveying method and system for energy-saving coal-fired power plant | |
| CN106123617A (en) | Line universal machine intelligent energy-saving control system and method are produced in hot rolling | |
| 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 | |
| CN114895555B (en) | Optimization method of coal holographic entry environment-friendly system of coal-fired unit furnace | |
| CN111338409A (en) | Universal desulfurization dust removal energy-saving optimization control system | |
| CN103418228B (en) | Intelligent sncr denitration system | |
| CN204746081U (en) | Can realize flue gas desulfurization automatic controls of ultra -clean emission | |
| CN112999857B (en) | Regulation and control method and regulation and control system for wide-load limestone slurry supply system | |
| CN212005189U (en) | Energy-saving water injection device with multiple pumps controlled by one pump | |
| CN105953251A (en) | Smoke recirculation energy-saving and emission-reducing intelligent device and control method | |
| CN113137650B (en) | Steam heat network system regulation and control method combined with distributed power generation | |
| CN216361286U (en) | External hanging type desulfurization closed loop optimization control system | |
| CN113019086B (en) | Precise feeding method of desulfurization synergist | |
| CN212893999U (en) | High-temperature bypass drying system and concentrated liquid feeding device | |
| CN204724018U (en) | The flue gas desulfurization automatic control system of ultra-clean discharge can be realized | |
| CN114281042A (en) | Energy-saving control method and device for wet desulphurization circulating system | |
| CN210178625U (en) | Anti-surge control system of vapor compressor | |
| CN110394046B (en) | Desulfurization operation optimization expert system |
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 |