CN103464286A - Asymmetrically-partitioned electric dust remover - Google Patents
Asymmetrically-partitioned electric dust remover Download PDFInfo
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- CN103464286A CN103464286A CN2013104596781A CN201310459678A CN103464286A CN 103464286 A CN103464286 A CN 103464286A CN 2013104596781 A CN2013104596781 A CN 2013104596781A CN 201310459678 A CN201310459678 A CN 201310459678A CN 103464286 A CN103464286 A CN 103464286A
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Abstract
The invention particularly relates to an asymmetrically-partitioned electric dust remover which solves the problems that an existing electric dust remover is substandard, and the emission effect is poor after modification. When N is an odd number, the dust collecting area of a (N+1)/2th electricity supply region is the largest, and the dust collecting area of the (N+1)/2th electricity supply region, the collecting area of an electricity supply region at the front end and the collecting area of an electricity supply region at the rear end gradually decrease. When N is an even number, the dust collecting region of a N/2th electricity supply region and the dust collecting area of the (N+1)/2th electricity supply region are the largest and the same, and the dust collecting area of the N/2th electricity supply region, the dust collecting area of the (N+1)/2th electricity supply region, the collecting area of an electricity supply region at the front end and the collecting area of an electricity supply region at the rear end gradually decrease. The asymmetrically-partitioned electric dust remover is reasonable and reliable in structural design, a front portion electric field is divided into cells and power supply is conducted independently so that voltages and currents of the front portion electric field can be greatly improved, therefore, the dust collecting efficiency of the front portion electric field is improved and a foundation is laid for reducing total emission; a rear portion electric field is divided into cells, so that vibration dust cleaning time sequence can be flexibly optimized, the influences of secondary flying dust are reduced and the dust removing efficiency is improved finally.
Description
Technical field
The present invention relates to electric dust collector, be specially a kind of asymmetrical subregion electric cleaner.
Background technology
At present, along with the environmental protection standard that country is new is put into effect, coal-burning power plant's dust emission limit value requires below 30mg/Nm3, and existing electric cleaner, due to not up to standard, faces technological transformation.The tradition reforming mode has the specific collection area of increasing, flue gas conditioning, replacing power supply, changes deashing pattern etc., and owing to lacking the corresponding theory support, transformation often has blindness, and correctional effect is not ideal.What have directly changes electricity bag or sack cleaner into, but through actual use in a few years, the sack cleaner following problem that comes out gradually: resistance is large, it is difficult etc. to change high, the useless bag of bag expense.
Summary of the invention
The present invention, in order to solve the existing electric cleaner discharge problem that exists emission effect poor of transforming not up to standard, provides a kind of asymmetrical subregion electric cleaner.
The present invention adopts following technical scheme to realize: asymmetrical subregion electric cleaner, the service area distributed before and after comprising N, N is natural number, when N is odd number, the dust-collecting area maximum of (N+1)/2 service area, and the distribution that all tapers off of the dust-collecting area of the dust-collecting area of (N+1)/2 service area and rear and front end service area; When N is even number, the dust-collecting area of N/2 service area and (N/2)+1 service area is maximum and identical, the distribution that all tapers off of the dust-collecting area of N/2 service area and (N/2)+1 service area and the dust-collecting area of rear and front end service area.
By up-to-date Electric Scrubber Efficiency empirical equation, relation in the electric field drawn in conjunction with experiment between breakdown voltage or maximum current and discharge electrode position, this bulk electric field of deduster is carried out to asymmetrical subregion, electric cleaner service area adopts asymmetrical subregion, improved Uniform discharge in electric precipitation, reduce anti-corona intensity, improve electric precipitation and effectively utilize space; By asymmetrical subregion, can realize optimizing rapping, reduce the impact of secondary fly-up; Finally, then coordinate corresponding power supply control technology, improve the electric field average field-strength, finally realize the significantly raising of efficiency of dust collection.
The dust-collecting area ratio of the service area of N from front to back is 1:1.3:1.5 ... 1.5:1.3:1, be that first equivalent increases progressively, rear equivalent is successively decreased distribution, make more than anterior voltage of electric field reaches 80KV, coordinate the strong cathode line of electric discharge, electric field strength is significantly improved, and greatly improve Uniform discharge in single electric field, electrical efficiency can reach more than 90%, a large amount of dust forwardly electric field are collected, thereby lay the foundation for reducing the outlet discharge.The rear class electric field is divided into little subregion, coordinates the cathode line of high discharge inception voltage, realizes high voltage low current, and can optimize flexibly the vibration dust-cleaning sequential, finally makes efficiency of dust collection reach more than 99.85%, below outlet discharge 30mg/Nm3.
Reasonable in design of the present invention is reliable, and anterior electric field is divided into to community, and power supply separately, can significantly improve the electric current and voltage of anterior electric field, thereby improve the dust-collecting efficiency of anterior electric field, for lowering total discharge, lays the foundation; The rear class electric field is divided into little subregion, can optimize flexibly the vibration dust-cleaning sequential, reduces the impact of secondary fly-up, finally improves efficiency of dust collection.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1-service area.
The specific embodiment
Asymmetrical subregion electric cleaner, the service area 1 distributed before and after comprising N, N is natural number, when N is odd number, the dust-collecting area maximum of (N+1)/2 service area 1, and the distribution that all tapers off of the dust-collecting area of the dust-collecting area of (N+1)/2 service area 1 and rear and front end service area 1; When N is even number, the dust-collecting area of N/2 service area 1 and (N/2)+1 service area 1 is maximum and identical, the distribution that all tapers off of the dust-collecting area of N/2 service area 1 and (N/2)+1 service area 1 and the dust-collecting area of rear and front end service area 1.
The dust-collecting area ratio of the service area of N from front to back 1 is 1:1.3:1.5 ... 1.5:1.3:1, be that first equivalent increases progressively, rear equivalent is successively decreased distribution.
In specific implementation process, the supporting multi-form cathode line of each service area 1, equipping rules is that anterior electric field cathode line discharge inception voltage is low, and electric discharge is strong, and rear class electric field cathode line discharge inception voltage is high, and electric discharge is evenly.
More than supporting supply voltage grade must be able to reach 82KV, and crest voltage and average voltage approach.
Electric cleaner is six service areas 1, and six service areas 1 from left to right the ratio of dust-collecting area be 1:1.3:1.5:1.5:1.3:1, by configuring corresponding high voltage source, make concentration of emission be reduced to 25 mg/Nm3.
Up-to-date Electric Scrubber Efficiency empirical equation is the emission request for 10-30mg/Nm3, and the empirical data of chamber research and Practical Project is by experiment summed up electric cleaner index type selecting effectiveness formula out:
Wherein
,
,
be defined as the electric precipitation index, other parameters are as follows:
,
: power plant's operating mode and particle radius related experiment coefficient;
Above-mentioned defined electric precipitation exponential size, in fact reflected the static energy storage of unit flue gas in electric cleaner, and the larger efficiency of dust collection of energy storage is higher; Above-mentioned efficiency of dust collection rule is adapted to conventional single phase poaer supply, intermediate frequency power supply, high frequency electric source, three phase mains, 3 electric fields, 4 electric fields and 5 electric-field dust collectors.
Modification Experience according to us to more than 50 125-600MW coal-burning power plant electric precipitations, propose to realize the following discharge of 30mg/Nm3, and 400mm is with the applied electric field intensity of the electric cleaner of pole span and meet following condition than specific collection area or electric precipitation index:
Under electric precipitation index and discharge theory, ash amount in the discharge of electric precipitation and the voltage of operation or electric-field intensity, coal and the ratio specific collection area of electric precipitation are relevant, the advance of power technology is to be reflected under identical deduster body and fire coal, the maximization of electric precipitation index.
Claims (2)
1. an asymmetrical subregion electric cleaner, the service area (1) distributed before and after comprising N, N is natural number, it is characterized in that: when N is odd number, the dust-collecting area maximum of (N+1)/2 service area (1), and the distribution that all tapers off of the dust-collecting area of the dust-collecting area of (N+1)/2 service area (1) and rear and front end service area (1); When N is even number, the dust-collecting area of N/2 service area (1) and (N/2)+1 service area (1) is maximum and identical, the distribution that all tapers off of the dust-collecting area of N/2 service area (1) and (N/2)+1 service area (1) and the dust-collecting area of rear and front end service area (1).
2. asymmetrical subregion electric cleaner according to claim 1, it is characterized in that: the dust-collecting area ratio of the service area of N from front to back (1) is 1:1.3:1.5 ... 1.5:1.3:1, be that first equivalent increases progressively, rear equivalent is successively decreased distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310459678.1A CN103464286B (en) | 2013-07-18 | 2013-10-08 | Asymmetrically-partielectric electric dust remover |
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| CN201310302049 | 2013-07-18 | ||
| CN2013103020498 | 2013-07-18 | ||
| CN201310302049.8 | 2013-07-18 | ||
| CN201310459678.1A CN103464286B (en) | 2013-07-18 | 2013-10-08 | Asymmetrically-partielectric electric dust remover |
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| CN103464286A true CN103464286A (en) | 2013-12-25 |
| CN103464286B CN103464286B (en) | 2016-03-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617805A (en) * | 2016-01-07 | 2016-06-01 | 福建龙净环保股份有限公司 | Design method and design system for electrostatic-bag dust collector |
| CN108889452A (en) * | 2018-07-10 | 2018-11-27 | 浙江菲达环保科技股份有限公司 | A kind of electrostatic precipitator selection method of flue gas deep temperature reduction |
| CN113145309A (en) * | 2021-03-12 | 2021-07-23 | 山西晋浙环保科技有限公司 | Electric dust collector design and model selection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617805A (en) * | 2016-01-07 | 2016-06-01 | 福建龙净环保股份有限公司 | Design method and design system for electrostatic-bag dust collector |
| CN108889452A (en) * | 2018-07-10 | 2018-11-27 | 浙江菲达环保科技股份有限公司 | A kind of electrostatic precipitator selection method of flue gas deep temperature reduction |
| CN108889452B (en) * | 2018-07-10 | 2023-08-04 | 浙江菲达环保科技股份有限公司 | Type selection method of electrostatic precipitator for deep cooling of flue gas |
| CN113145309A (en) * | 2021-03-12 | 2021-07-23 | 山西晋浙环保科技有限公司 | Electric dust collector design and model selection method |
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| CN103464286B (en) | 2016-03-23 |
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Address after: 030009 No. 18 Ying Xi Street, Shanxi, Taiyuan Applicant after: China Energy Engineering Group Shanxi Electric Power Environmental Protection Equipment General Factory Address before: 030009 No. 18 Ying Xi Street, Shanxi, Taiyuan Applicant before: China Energy Engineering Group Shanxi Electric Power Environmental Protection Equipment General Factory |
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Granted publication date: 20160323 Termination date: 20181008 |