CN201384906Y - Device for polymerizing particles - Google Patents

Abstract

The utility model discloses a device for polymerizing particles installed at the front end of the device for controlling pollution, comprising a housing, a power supply, a bipolar discharge area and a flow polymerization area; the bipolar discharge area is internally provided with a plurality of low pressing plates; positive discharge poles are installed between two adjacent low-voltage plates to form positive discharge channels or negative discharge poles are installed between two adjacent low-voltage plates to form negative discharge channels; the positive discharge channels and the negative discharge channels are arranged at intervals; the flow polymerization area is internally provided with turbulence columns connected with the positive discharge poles or the negative discharge poles through leads; the turbulence columns connected with the positive discharge poles are positive turbulence columns and the turbulence columns connected with the negative discharge poles are negative turbulence columns; and the positive turbulence columns and the negative turbulence columns are distributed in front-and-back manner. The polymerization device polymerizes static electricity and the mediums together, and the positive turbulence columns and the negative turbulence columns are distributed in front-and-back manner, thereby ensuring the insulating distance between the positive turbulence columns and the negative turbulence columns, reducing the volume of the device, and further reducing the cost.

Description

The particulate polyplant

[technical field]

The utility model relates to the particulate polyplant, belongs to the flue gas ash removal field in the air contaminant treatment, can be applicable to carrying of newly-built equipment of fume dust remover or old equipment and imitates in the transformation.It is installed on the air inlet flue of pollution control equipments such as electric cleaner or sack cleaner, fine dust can be aggregated into big particle, improves deduster arresting efficiency thereafter.

[technical background]

Often contain a large amount of pellet (the aerodynamics equivalent diameter claims PM10 less than the fine particle of 10 μ m) in the industrial production discharged flue gas.Pellet (PM10) can stop several days in surrounding air even several weeks, the principal element that be not only and cause air pollution, reduces atmospheric visibility, and be the killer of harm humans health.Pellet can be accumulated in the respiratory system after being sucked by human body, causes multiple disease.More and more discover: the increase of the generation of PM10 and coronary heart disease, myocardial infarction, hypertension and apoplexy (palsy) and death is closely related.It is dark more that tiny more particle enters the position of respiratory tract, big more to the harm of human body.Particle diameter enters alveolar less than the particle of 2 μ m even the lung that can go directly, and participates in blood circulation directly, and damage lung tissue causes a series of pathologies.

No matter be, all exist the health risk that human body is exposed to pellet to some extent in developed country or in developing country.2005 " World Health Organization's air quality criteria " determined standard for PM for the first time, and regulation PM10 average is 20 μ g/m ³, the PM2.5 average is 10 μ g/m ³Global environmental protection institution all controls the discharging of pellet at pay attention to day by day.

The electrostatic precipitator of comparatively using always in the dedusting field is better greater than the capture effect of the particle of 10 μ m to particle diameter at present, efficient can reach 99.9% usually, and to PM10, particularly to be that the fine particle of 0.5 μ m～2 μ m captures effect very poor for particle diameter, generally be lower than 90%, when the worst even be lower than 50%, then need increase electric field quantity or reduce wind speed as raising the efficiency; Sack cleaner is handled in the time of can sucking particle also need reduce the rate of filtration, and these all cause not only increasing cost but also increase floor space, for sack cleaner, also can increase air resistance, increases energy resource consumption.

For overcoming the above problems, many companies and research institution have proposed to make the preprocess method of fine particle polymerization before deduster.This method is different from the pre-charged technology of 70～eighties of last century.Polymerization is that coalescent phenomenon takes place in being in contact with one another process the suspended particulate in the gas.But, present polyplant all be adopt single dependence particle in flow media because of turbulence causes the collision polymerization, the mixing flocculating result of particle is relatively poor, makes the fine solid particle discharge capacity of follow-up electric cleaner still very high.Adopt lead that turbulence columns is connected with positive discharge electrode or negative discharge electrode in another utility model that the applicant applies for simultaneously, made the particulate polyplant can collect the static polymerization and media flow is polymerized to one, improved the mix particles flocculating result.For guaranteeing the normal operation of equipment, positive and negative turbulence columns spaced apart must keep certain insulation distance, but the distance of two turbulence columns can be wasted very large space too greatly again, increases equipment volume, raises the cost.

[summary of the invention]

The purpose of this utility model is exactly in order to solve problems of the prior art, proposes a kind of particulate polyplant, can reduce equipment volume under the situation that guarantees the turbulence columns insulation distance, can reduce cost.

For achieving the above object, the utility model patent has proposed a kind of particulate polyplant, comprise housing, power supply, bipolar region of discharge, flow polymerizing, be provided with some low pressing plates in the described bipolar region of discharge, positive discharge electrode is set between the two adjacent low pressure plates to be constituted positive discharge channel or the negative discharge channel of negative discharge electrode formation is set, described positive discharge channel and negative discharge channel are arranged at interval, be provided with turbulence columns in the described flow polymerizing, described turbulence columns adopts lead to be connected with positive discharge electrode or negative discharge electrode; The turbulence columns that is connected with positive discharge electrode is positive turbulence columns, and the turbulence columns that is connected with negative discharge electrode is negative turbulence columns, and described positive turbulence columns and negative turbulence columns are staggered front to back distribution.

As preferably, have high voltage line inlet on the described housing, the output line of described power supply is connected to positive discharge electrode and negative discharge electrode by high voltage line inlet.

As preferably, be equipped with one group of suspension insulator on described each positive discharge channel and the negative discharge channel.

As preferably, adopt one or multi-channel connecting rod to connect between all positive discharge electrodes, also adopt one or multi-channel connecting rod to connect between all negative discharge electrodes, connecting rod adopts insulation to be supported and fixed on the housing.

The beneficial effect of the utility model patent: static polymerization of the utility model polyplant collection and media flow are polymerized to one, fine solid particle is combined with big dust increase slightly, improve the mix particles flocculating result.And spaced apart positive turbulence columns and negative turbulence columns are staggered front to back distribution, have both guaranteed the insulation distance between positive turbulence columns and the negative turbulence columns, have reduced equipment volume again, have reduced cost.

[description of drawings]

Fig. 1 is the structural representation of the utility model particulate polyplant;

Fig. 2 is the transverse sectional view of the utility model particulate polyplant;

Fig. 3 is the longitudinal sectional view of the utility model particulate polyplant;

Fig. 4 is the structural representation of the utility model particulate polyplant;

Fig. 5 is the structural representation of the discharge electrode of non-homogeneous layout in the utility model;

Fig. 6 is the structural representation of turbulence columns in the utility model.

[specific embodiment]

Consult Fig. 1,2,3,4,5,6, the particulate polymerizer, comprise housing 1, power supply, bipolar region of discharge 2, flow polymerizing 3, be provided with some low pressing plates 8 in the described bipolar region of discharge 2, positive discharge electrode 5 is set between the two adjacent low pressure plates 8 to be constituted positive discharge channel L1 or the negative discharge channel L2 of negative discharge electrode 6 formations is set, described positive discharge channel L1 and negative discharge channel L2 arrange that at interval the width of described positive discharge channel L1 is slightly larger than the width of negative discharge channel L2; Be provided with turbulence columns 12 in the described flow polymerizing 3, described turbulence columns 12 adopts lead 11 to be connected with positive discharge electrode 5 or negative discharge electrode 6; The turbulence columns 12 that is connected with positive discharge electrode 5 is positive turbulence columns, and the turbulence columns 12 that is connected with negative discharge electrode 6 is negative turbulence columns, and described positive turbulence columns and negative turbulence columns are staggered front to back distribution; Described positive discharge electrode 5 and negative discharge electrode 6 are non-homogeneous layout; Turbulence columns 12 has different-diameter along short transverse.Described positive discharge electrode 5 and negative discharge electrode 6 non-homogeneous is arranged as between the many larger radius of curvature corona wires 13 one of arranged spaced and makes auxiliary electrode than major diameter pipe 14.Described larger radius of curvature corona wire adopts any one in round wire, acupuncture line, angle steel prickle wire, tubular barbed wire, the jaggies.Have high voltage line inlet 4 on the described housing 1, the output line of described power supply is connected to positive discharge electrode 5 and negative discharge electrode 6 by high voltage line inlet 4.Be equipped with one group of suspension insulator 7 on described each positive discharge channel L1 and the negative discharge channel L2.Adopt one or multi-channel connecting rod 9 to connect between all positive discharge electrodes 5, also adopt one or multi-channel connecting rod 9 to connect between all negative discharge electrodes 6, connecting rod 9 adopts insulation to support 10 and is fixed on the housing 1.Housing 1 is the dismountable structure in top or side, is beneficial to internals and changes.Establish the parallel channels of alternate positive and negative in the bipolar region of discharge 2, the grit in the air-flow obtains positive and negative electric charge during by positive and negative passage respectively.

The width of positive discharge channel L1 is slightly larger than the width of negative discharge channel L2.The breakdown voltage difference of positive and negative corona electrode, the breakdown voltage of negative corona electrode are widened positive discharge channel than the height of positive corona electrode, can obtain higher average field intensity.Therefore adopt width to be slightly larger than the positive discharge channel L1 of negative discharge channel L2.

Particle of the present invention relies on two kinds of mechanism to make the dust polymerization simultaneously, and a kind of is static polymerization under the Coulomb force effect, and another kind is the media flow polymerization under viscous force and the inertia force effect.Because electrostatic force reduces rapidly with the increasing of distance, therefore to make granule as much as possible near the bulky grain of being with opposite polarity.Turbulence columns energising so that large and small particle farthest close, polymerization under the effect of electrostatic repulsion, and is difficult for breaking away from before arriving deduster.In flow polymerizing 3, under the quadruple effect of the attraction of static heteropole, homopolarity repulsion, turbulent fluctuation vortex and turbulent flow, the bulky grain polymerization of the granule of positive polarity passage lotus positive electricity and the bear electricity that flows out from the adjacent cathode passage, the bulky grain polymerization of the granule of negative polarity passage bear electricity and the lotus positive electricity that flows out from the adjacent positive passage.Collect polymerization unit that bipolar static polymerization of different distance and media flow be polymerized to one and fine solid particle combine with big dust increase slightly, thereby improve the efficient of follow-up deduster.Be a a progressive step than the polyplant the present invention who utilizes single mechanism.

Positive turbulence columns and negative turbulence columns are staggered front to back distribution can guarantee each other insulation distance, and the mixing that helps dust is more condensed.

The same polarity dust is said in principle owing to there being the polymerization that repulsion is unfavorable for particle between particle.And in fact the fine solid particle particle in the flue gas all belongs to high-disperse-system, and shape differs, and under identical charged condition, the carrying capacity of particle is different.Even the carrying capacity of particle is the same, electric charge is also not necessarily the same in the distribution of particle surface.Therefore, when the same polarity powder dust particle closely near the time, will induce the electric charge of opposite in sign, make gravitation polymerization greater than repulsion.Therefore, adopt the sparking electrode of non-homogeneous layout to strengthen the probability of same polarity dust contact, strengthened the polymerization of same sex dust.The wherein part of the sparking electrode of non-homogeneous layout is the larger radius of curvature corona wire, can be in round wire, acupuncture line, angle steel prickle wire, tubular barbed wire, the jaggies any one.Employing is guaranteeing can to obtain high voltage under the not too high prerequisite of initial corona voltage, and can remedy the defective that the small curvature radius corona wire is easy to wear and tear than the corona wire of larger radius of curvature.

The preferred high frequency pulse power supply that adopts to improve the uniformity and the particle carrying capacity of corona discharge along whole polymerizer section, improves polymerization effect.The advantage of high frequency pulse power supply is as follows: (1) volume is little, in light weight.(2) adopt pulse power supply, dust is filled more electric charge with when the power supply pulse, and the electric charge that pulse is obtained during disappearing discharges to some extent, so dust layer can not cause harmful anti-corona because of stored charge forms high field intensity; (3) current-limiting resistance is little in the pulse power, and is therefore more energy-conservation; (4) output characteristics of the pulse power self just has the characteristics that electric arc develops rapidly that suppress.Because IGBT switching response speed is exceedingly fast, in case find just power cutoff immediately of spark discharge, restore electricity again then, these steps just can be finished in delicate tens.Therefore can strengthen control to spark discharge.

Extraordinary turbulence columns 12 in the flow polymerizing 3 has different-diameter along short transverse, and dust-contained airflow runs into turbulence columns 12 can produce the three-dimensional flow-disturbing effect that Kalman's vortex street and turbulent flow cause, the collision polymerization of increase size particles.

In concrete enforcement, preferably adopt 2 power supplies, one is positive polarity, one is negative polarity, and apart from selecting 60kV-80kV for use, common electric pressure is 72kV to electric pressure according to different poles, common both positive and negative polarity anomaly average is 250mm, and current class is 5mA-10mA.Power supply adopts high frequency pulse power supply.Positive discharge channel L1 is wideer by about 10% than negative discharge channel L2.Be the positive discharge electrode 5 and the negative discharge electrode 6 of non-homogeneous placement in the passage, promptly the larger-diameter pipe of one of several acupuncture line 13 back layout 14 is as auxiliary electrode.The earth resistance of device is less than 0.5 ohm.

Flue gas is generally about 10m/s by the gas speed in polyplant space, should not be low excessively, otherwise cause the bottom dust stratification easily, can be coated with coatings as the ancillary method of avoiding dust stratification at housing 1 inwall.Flue gas is basic identical with the front and back flue by the theoretical gas speed of electric field, is generally about 12m/s-15m/s.The length of whole polymerizer generally is no more than 5m.

In the flow polymerizing 3, the turbulence columns 12 of positive-negative polarity is staggered, one group of corresponding three-dimensional turbulence columns of discharge channel.The turbulent fluctuation vortex that produces should satisfy such condition: can farthest increase collision and interaction between size particles, not offset the effect to polymerization of electrostatic attraction and repulsion simultaneously, determine the optimum size of turbulent fluctuation vortex in view of the above.

The foregoing description is to explanation of the present utility model, is not to qualification of the present utility model, any scheme after the utility model simple transformation is all belonged to protection domain of the present utility model.

Claims (4)

1. particulate polyplant, it is characterized in that: comprise housing, power supply, bipolar region of discharge, flow polymerizing, be provided with some low pressing plates in the described bipolar region of discharge, positive discharge electrode is set between the two adjacent low pressure plates to be constituted positive discharge channel or the negative discharge channel of negative discharge electrode formation is set, described positive discharge channel and negative discharge channel are arranged at interval, be provided with turbulence columns in the described flow polymerizing, described turbulence columns adopts lead to be connected with positive discharge electrode or negative discharge electrode; The turbulence columns that is connected with positive discharge electrode is positive turbulence columns, and the turbulence columns that is connected with negative discharge electrode is negative turbulence columns, and described positive turbulence columns and negative turbulence columns are staggered front to back distribution.

2. particulate polyplant as claimed in claim 1 is characterized in that: have high voltage line inlet on the described housing, the output line of described power supply is connected to positive discharge electrode and negative discharge electrode by high voltage line inlet.

3. particulate polyplant as claimed in claim 1 is characterized in that: be equipped with one group of suspension insulator on described each positive discharge channel and the negative discharge channel.

4. as any one described particulate polyplant in the claim 1 to 3, it is characterized in that: adopt one or multi-channel connecting rod to connect between all positive discharge electrodes, also adopt one or multi-channel connecting rod to connect between all negative discharge electrodes, connecting rod adopts insulation to be supported and fixed on the housing.

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