CN110796334A - Performance evaluation method of dust removal facility under ultralow emission requirement - Google Patents
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- 239000000428 dust Substances 0.000 title claims abstract description 116
- 238000011156 evaluation Methods 0.000 title claims abstract description 71
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 238000005265 energy consumption Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 13
- 230000036541 health Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 239000000779 smoke Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
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- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 239000012716 precipitator Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012950 reanalysis Methods 0.000 description 1
- 238000013077 scoring method Methods 0.000 description 1
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- 239000012719 wet electrostatic precipitator Substances 0.000 description 1
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Abstract
The invention discloses a performance evaluation method of a dust removal facility under an ultralow emission requirement, which is characterized in that the dust removal facility is a dust remover applied to the field of thermal power, such as a conventional electric dust remover, a bag type dust remover, a wet type electric dust remover, a low-low temperature electric dust remover, an electric bag composite dust remover, a radial flow type dust remover and the like, and the performance evaluation contents comprise performance assessment index evaluation, operation and maintenance index evaluation, resource energy consumption index evaluation and technical and economic index evaluation; and evaluating the technical performance of the dust removal facility under the ultra-low emission requirement by adopting a comprehensive evaluation method. The invention is beneficial to the comparison of the horizontal and vertical technologies of the dust removal technology, the energy conservation and consumption reduction of the dust removal facility, the effective technical control of the dust removal facility under the ultra-low emission requirement, the establishment of the technical performance index database and the efficient solution of the problems in the subsequent production operation.
Description
Technical Field
The invention relates to the technical field of air pollution control, in particular to a performance evaluation method of a dust removal facility under an ultralow emission requirement.
Background
In order to actively respond to the requirements of national environmental protection policies, the ultra-low emission modification work in the thermal power field is rapidly promoted, the coal-electricity flue gas treatment level is comprehensively improved, and the ultra-low emission technology is also rapidly developed at home. In the technical field of flue gas dust removal, in addition to the conventional electric dust removal technology and the bag-type dust removal technology, various novel dust removal technologies come out endlessly, such as an electric dust remover with a high-efficiency power supply, an electric dust remover with a rotary electrode, a wet-type electric dust remover, an electric bag composite dust remover, a radial-flow dust removal demister and the like. Due to the tight time and heavy tasks, the novel dust removal technology has short engineering application time and rapid popularization, which leads to the good and uneven quality and uneven running performance of the reconstruction engineering. From the operating condition of the manufactured ultra-low emission dust removal facility, the condition is not optimistic, certain problems exist in engineering quality, technical performance indexes, the current operating situation and the like, but due to the lack of an effective performance evaluation technical method, many problems cannot be found in time, and hidden dangers are buried for safe production.
The evaluation of the dust removal facilities under the ultra-low emission requirement is an important stage of a project construction period, is an important means for monitoring the technical performance of the reconstruction project, and is the reanalysis evaluation of the technical performance of the project. Therefore, for the dust removal facilities with problems, if the technical performance evaluation is not timely and effectively carried out, and the problems are found out and corrected in time, the normal management, operation and maintenance of the follow-up flue gas dust removal facilities are influenced, and the operation and maintenance cost and the pollutant overproof emission risk are increased. Therefore, it is very urgent and necessary to provide an effective method for evaluating the performance of a dust removal facility.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a performance evaluation method of a dust removal facility under the condition of ultralow emission requirement.
The technical scheme adopted by the invention for solving the problems is as follows: a performance evaluation method of a dust removal facility under an ultra-low emission requirement is characterized in that the dust removal facility is a dust remover applied to the field of thermal power, such as a conventional electric dust remover, a bag type dust remover, a wet type electric dust remover, a low-low temperature electric dust remover, an electric bag composite dust remover, a radial flow type dust remover and the like, and performance evaluation contents comprise performance assessment index evaluation, operation and maintenance index evaluation, resource energy consumption index evaluation and technical and economic index evaluation; and evaluating the technical performance of the dust removal facility under the ultra-low emission requirement by adopting a comprehensive evaluation method.
The performance assessment index relates to the indexes of dust removal efficiency, smoke concentration in clean flue gas, air leakage rate, system resistance, flue gas temperature drop and SO3Removal rate (optional), droplet removal rate (optional), PM2.5Emission concentration (optional).
The running and maintenance index evaluation relates to indexes of the health condition of the dust remover body, the health condition of a power supply, the running condition of an ash cleaning system, the running condition of an auxiliary facility, the running condition of an ash conveying system and the health condition of a CEMS;
the health condition of the dust remover body mainly refers to whether the body is intact, the external heat preservation is carried out, air leakage is carried out, the position of an industrial measuring point is carried out, dust is accumulated on a polar plate of a polar plate, the polar plate is broken and short-circuited, the polar plate is deformed, insulating ceramics and the like meet the design requirements;
the health condition of the power supply mainly refers to whether the output power, short circuit, power loss, running current and voltage values and the like of the power supply meet the running requirements;
the operation condition of the ash removal system mainly refers to whether the rapping device, the blowing system (optional), the washing water system (optional), the ash removal period, the water consumption (optional) and the air consumption meet the normal operation requirements of the dust removal facility;
the operation conditions of the auxiliary facilities mainly indicate whether a heating system, an ash discharging device, an alkali adding system (optional), a washing water treatment system (optional) and the like meet the operation requirements or not;
the operation condition of the ash conveying system mainly indicates whether an ash hopper material level meter, temperature, ash conveying pressure, ash conveying flow, bin pump volume and the like meet the normal operation requirements of the dust remover;
the CEMS health condition mainly refers to whether the online monitored pressure, temperature, smoke components and other meters work normally or not;
the resource energy consumption index evaluation relates to indexes which mainly comprise electricity consumption, water consumption (optional), alkali consumption (optional), compressed air consumption and the like;
the technical and economic index evaluation relates to indexes mainly including system resistance, flue gas temperature drop, dust removal facility availability and the like;
the comprehensive evaluation method quantifies each evaluation index by using the score, and the calculation formula of the score is as follows:
Pi= Ci/Ci0×100
in the formula: piRelative score percentage of each evaluation index; ciDividing actual scores of all evaluation index systems; ci0The evaluation indexes are divided into standard points and points.
The performance evaluation method of the dust removal facility under the ultralow emission requirement is characterized by comprising the following steps:
(1) determining the types of dust removing facilities such as an electric dust remover, a bag type dust remover, a wet type electric dust remover, an electric bag composite dust remover and the like;
(2) screening and evaluating technical indexes and parameters according to the type of the dust removal facility;
(3) collecting project data, such as feasibility research reports, design data, construction data, engineering technical protocols, acceptance reports, debugging reports, assay reports, operation ledgers, maintenance ledgers and the like, and performing preliminary technical evaluation;
(4) performing on-site evaluation according to the grasped condition, and verifying the primary technical evaluation content;
(5) quantitatively scoring each evaluation index according to the field evaluation condition;
(6) summarizing the problems and proposing suggestions according to the evaluation conditions to form a final evaluation technical report;
(7) and finishing the performance evaluation work of the dust removal facility under the ultra-low emission requirement.
Compared with the prior art, the invention has the following advantages and effects:
1. the performance evaluation technical index of the dust removal facility is quantified, objective, fair and scientific, and is beneficial to the transverse and longitudinal technical comparison of the dust removal technology; 2. the operation defects of the dust removal facility are found in time, and a rationalization suggestion is provided, so that the energy conservation and consumption reduction of the dust removal facility are facilitated; 3. the dust removal facility is comprehensively and systematically subjected to technical physical examination to eliminate technical hidden dangers and promote the rectification and optimization of the dust removal technology; 4. the method is favorable for carrying out effective technical management and control on the dust removal facilities under the ultra-low emission requirement, establishes a technical performance index database, and efficiently solves the problems in subsequent production operation.
Drawings
FIG. 1 is a flow chart of a method for evaluating the performance of a dedusting facility under ultra-low emission requirements in this embodiment;
FIG. 2 is a frame diagram of the main technical indexes of the electrostatic precipitator in the dust precipitator and the technical index classification in the present embodiment;
FIG. 3 is a frame diagram of the main technical indexes of the bag-type dust collector in the dust collector and the technical index classification in this embodiment;
FIG. 4 is a frame diagram of the main technical indexes of the wet electrostatic precipitator in the dust precipitator and the technical index classification in the present embodiment;
FIG. 5 is a frame diagram of the main technical indexes of the electrostatic fabric filter and the electrostatic fabric filter in the classification of the technical indexes in the embodiment;
FIG. 6 is a frame diagram of the main technical indexes of the low-temperature electrostatic precipitator in the dust remover and the technical index classification in this embodiment.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
The performance evaluation method of the dust removal facility under the requirement of ultralow emission in the embodiment specifically describes the invention by taking a Z power plant project as an example, and the specific content comprises the following steps:
the ultra-low emission dust removal process of the No. 4 unit of the Z power plant comprises an electric dust remover and a wet-type electric dust remover, and the dust concentration at the inlet of the electric dust remover is designed to be 40g/m3The concentration of the smoke dust at the outlet is not more than 80mg/m3The dust removal efficiency is not lower than 99.80%, the air leakage rate is not higher than 2%, and the system resistance is not more than 245 Pa. The side part is adopted to shake and clean the ash. The concentration of the smoke dust at the inlet of the wet electric dust collector is 40mg/m3The concentration of the smoke dust at the outlet is not more than 5mg/m3The dust removal efficiency is not lower than 87.5 percent, the system resistance is not more than 300Pa, and SO3The removal rate is not less than 80 percent, the removal rate of fog drops is not less than 80 percent, and PM2.5The removal rate is not lower than 80 percent, and the average water consumption is not higher than 2 t/d. The wet electric dust remover adopts a tower top arrangement mode and adopts intermittent washing water for removing dust. And based on the ultra-low emission reconstruction technical background, evaluating the performance of the dust removal facility.
Firstly, screening performance evaluation technical indexes according to technical parameters of a dust remover, wherein the specific classification comprises performance assessment indexes, operation and maintenance indexes, resource energy consumption indexes and technical and economic indexes. The performance evaluation indexes comprise dust removal efficiency, outlet smoke concentration, body resistance, air leakage rate and SO3Removal rate, droplet removal rate, and PM2.5Removal rate, average water consumption, etc.; the operation and maintenance indexes comprise the health condition of the dust remover body, the health condition of a power supply, the operation condition of the ash removal system, the operation condition of auxiliary facilities, the operation condition of the ash conveying system and the health condition of CEMS; the resource energy consumption indexes comprise electricity consumption, water consumption, alkali consumption, compressed air consumption and the like; the technical and economic indexes comprise system resistance, flue gas temperature drop, dust removal facility availability and the like.
Then, collecting related data of ultralow emission modification of the dust removal facility of the unit No. 4 of the Z power plant according to the screened performance evaluation technical indexes, wherein the related data comprises a feasibility research report, a return evaluation report, a design scheme, a construction scheme, an engineering modification technical protocol, a debugging report, a supervision report, an equipment account, an operation account, a maintenance account, historical data, an environmental protection accident account, an operation fault analysis report, a production report in the last year, an analysis and test report and the like; summarizing the technical performance of the dust remover according to the collected related data, for example, the dust removal efficiency is 99.80 percent and the body resistance isThe value is 229Pa, the requirement of a guaranteed value is met, and the mark is not deducted; the fog drop removal rate is 78.6 percent, and PM2.5The removal rate is 75.4%, the requirement of a guaranteed value is not met, and corresponding fractions are deducted; the machine account is maintained to record the phenomena of dust accumulation, short circuit caused by polar line fracture, unsmooth dust falling of a dust hopper, current and voltage values of the wet electric dust collector lower than a designed value by 40 percent, power failure caused by power failure and creepage of insulating ceramics; deviation of the ash content of the entering coal from the designed coal ash content; the consumption of washing water of the wet electric dust collector is 2.11t/d and exceeds the design value; the online monitoring of the temperature deviation of the flue gas at the inlet and the outlet of the electric dust collector is large, and the preliminary evaluation is carried out aiming at specific indexes.
The method is characterized in that the on-site examination and evaluation conditions of the No. 4 unit of the Z power plant are implemented, the on-site examination and evaluation work is carried out, and the on-site examination and evaluation work is fully communicated and communicated with related technical personnel to ensure that each index is verified without errors, for example, indexes related to the health condition of a dust remover body, such as the indexes of intact body, external heat preservation, air leakage, industrial measuring point positions, dust accumulation of polar plates, polar plate broken lines and short circuits, polar plate deformation, insulating ceramics and the like, indexes related to the health condition of a power supply, such as power output power, short circuits, power loss, operating current and voltage values, and the like, indexes related to the operation condition of a dust cleaning system, such as a rapping device, a flushing water system, a dust cleaning period, water consumption, gas consumption and the like, indexes related to the operation condition of a dust conveying system, such as a dust hopper material level meter, temperature, dust conveying pressure, dust conveying flow, indexes related to the health condition of the CEMS comprise pressure, temperature, smoke components and the like, online monitoring meters are used for quantitatively scoring according to a scoring method, scores of all indexes are determined, and all indexes and total score are obtained.
Finally, aiming at the problems found in the evaluation work, a rationalization suggestion is provided, which comprises the optimization of power supply operation parameters under different working conditions, an online meter calibration method, the maintenance of a dust remover body, the optimization of a dust cleaning period, the optimization of the temperature of a heating system, the on-site inspection of key points and the like, the current technical problems and technical hidden dangers are pointed out, precautionary preparation and emergency plans are made in advance, and a final performance evaluation technical report is formed.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and modifications made by those skilled in the art without departing from the spirit and scope of the present invention are also within the scope of the present invention.
Claims (3)
1. A performance evaluation method of a dust removal facility under an ultralow emission requirement is characterized in that the dust removal facility is a conventional dust remover applied to the field of thermal power, and performance evaluation contents comprise performance assessment index evaluation, operation and maintenance index evaluation, resource energy consumption index evaluation and technical and economic index evaluation; and evaluating the technical performance of the dust removal facility under the ultra-low emission requirement by adopting a comprehensive evaluation method.
2. The method for evaluating the performance of a dust removal facility under the ultra-low emission requirement of claim 1, wherein the comprehensive evaluation method quantifies each evaluation index by using a score, and the score is calculated by the following formula:
Pi= Ci/Ci0×100
in the formula: piRelative score percentage of each evaluation index; ciDividing actual scores of all evaluation index systems; ci0The evaluation indexes are divided into standard points and points.
3. The method for evaluating the performance of a dust removal facility under the ultra-low emission requirement of claim 1, comprising the steps of:
(1) determining the type of a dust removal facility;
(2) screening and evaluating technical indexes and parameters according to the type of the dust removal facility;
(3) collecting project data and carrying out primary technical evaluation;
(4) performing on-site evaluation according to the grasped condition, and verifying the primary technical evaluation content;
(5) quantitatively scoring each evaluation index according to the field evaluation condition;
(6) summarizing the problems and proposing suggestions according to the evaluation conditions to form a final evaluation technical report;
(7) and finishing the performance evaluation work of the dust removal facility under the ultra-low emission requirement.
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Application publication date: 20200214 |