CN201684661U

CN201684661U - Artificial board industry wet electrostatic dust collector

Info

Publication number: CN201684661U
Application number: CN2010202189458U
Authority: CN
Inventors: 那斌; 臧明明; 周捍东; 徐长妍; 丁涛
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2010-06-08
Filing date: 2010-06-08
Publication date: 2010-12-29
Anticipated expiration: 2020-06-08

Abstract

The utility model relates to an artificial board industry wet electrostatic dust collector, whose structure includes: a corona discharge electrode, a dust collecting electrode, an insulator chamber, a top beam, a top cap, a dust remover base, an air flow distribution plate, an intake port, a funnel type flow guiding device, a base girder, a cinder valve, a funnel type flow guiding device, an air flow distribution plate, a sprayer, a defogging device, a water-proof fan, an exhaust gas export, a liquid outlet, a cleaning hole, horn type import and export reinforced frames, import and export flanges. The utility model has advantages that: it can perform further purification to the exhaust after separation of the purification of the hot gas produced in artificial board drying and the like working sections through a cyclone separating device, so that its discharging concentration achieves the prescribed requirement of the national discharge standard, and the cleaning efficiency to the harmful constituents reaches more than 98%. The wet electrostatic dust collector takes integrated use of electrostatic precipitator and gas cleaning equipment relevant mechanisms, and perform relevant optimization to the electrostatic precipitation device, the electrostatic dust collection part electric power supply system adopts a pulse power supply mode, simplifying the device structure and improving the equipment operation stability.

Description

The wood-based panel industry wet cottrell

Technical field:

The utility model relates to a kind of be used for effectively removing the dust in the high-temp waste gas that wood-based panel industry heating center produces and the wood-based panel industry wet cottrell of pernicious gas.Belong to timber industry dust separation device field.

Background technology:

The development of China's timber industry is started in last century five, the sixties, has experienced from the middle and later periods of the eighties to begin to introduce successively external complete production line.Along with the development of society and the people raising gradually to environmental quality requirement, the environmental improvement and the emission control of timber industry also come into one's own day by day, particularly pollute more serious artificial board enterprise.Increasing artificial board enterprise has been set up heating center, is fuel with the dust the like waste that produces in producing, and the heat energy of its generation provides workshop sections such as dry and hot pressing to use.The waste gas that these workshop sections produce is high-temperature flue gas, not only contains solia particles such as dust, and contains harmful components, as ineffective purified treatment, can pollute atmosphere after being discharged to atmosphere, seriously influence environmental quality, also can have a strong impact on the development of artificial board enterprise.

The cleaning equipment of present domestic wood-based panel industry heating center normally adopts cyclone separator to carry out the separation of solia particle, separative efficiency is not high, and particulate in the tail gas and pernicious gas often just do not discharge atmosphere through double purification, thereby do not reach the requirement of discharging standards regulation.Therefore at this situation development of new efficiently cleaning equipment just be of great immediate significance.

Summary of the invention:

The utility model proposes a kind of wood-based panel industry wet cottrell, the fine dust and the pernicious gas that produce at wood-based panel industry heating center have high efficiency cleaning equipment, and its purpose is intended to overcome the above-mentioned defective of existing in prior technology.Equipment Related Mechanism such as integrated use electrostatic precipitator and gas purification, and the electrostatic precipitation part correlation optimized, thereby utilize electric power system that the two poles of the earth are powered and produce corona, charged to atomized drop, charged drop and dust pass through inertial collision, interception, gravity, electrostatic attraction, the comprehensive function of multiple mechanism such as diffusion, make its dust have electrostatic attraction (Coulomb force) to band opposite polarity electric charge, not charged dust is had the charged drop of image force (imageforce) to rise with the raising of drop charge-mass ratio (ratio of carried charge and water quality) to the capture rate of dust, when pernicious gas passes through the deduster gas cleaning plant, by nozzle cleaning solution being loose is fine drop, with the pernicious gas haptoreaction, thereby effectively reduce the pollution level that heating center in the wood-based panel industry produces gas.

Technical solution of the present utility model: it is characterized in that the corona discharge electrode and the dust collector pole utmost point in the wet cottrell join by connecting rod; Insulator chamber in the wet cottrell shell is installed on the wet cottrell back timber and by the deduster overhead guard and covers, the wet cottrell back timber props up by about the deduster column, the deduster column is contained on the wet cottrell basis, airflow-distribution board is installed in the electrostatic precipitator air inlet, the funnel type guiding device is installed on the wet cottrell bottom girder, unloading valve is installed on the exit of funnel type guiding device lower end, the wet cottrell right part is provided with airflow-distribution board, spray equipment is equipped with in the orifice plate top, demister, anti-Water fan is installed in the waste gas outlet successively, deduster is provided with liquid outlet and clean-out hatch, it is that four I-steel are welded in " well " font on two columns of import and export that trumpet type is imported and exported reinforcing frame, imports and exports ring flange and is arranged at the end of wet cottrell trumpet type import and export so that be connected with cleaning shaft.

Major advantage of the present utility model: take away electric charge when water smoke directly sprays to corona discharge electrode and form charged drop, they can be further charged at the nearly ionized region quilt of corona discharge simultaneously, because of adopting static coalescence and power coalescence dust removal mechanism, so very high efficiency of dust collection; Adopted the pulse power supply technology, overcome the back corona phenomenon that electrostatic precipitator forms in the electric field when collecting high resistivity dust, thereby improved the efficiency of dust collection of electrostatic precipitator high resistivity dust; Optimize electrostatic precipitation mechanism, adopted charged atomized drop mechanism, can effectively reduce dust secondary fly-up phenomenon, also can effectively reduce dust specific resistance simultaneously; The gas cleaning plant part adopts the chemism purifying harmful gas, thereby effectively handles fine wooden dust and pernicious gas that wood-based panel industry heating center produces, reduces the pollution level of wood-based panel industry heating center.

Description of drawings:

Fig. 1 is the wet cottrell structural front view.Fig. 2 is the left view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.Fig. 4 is the band steel barbed nail corona electrode of wet cottrell.

Fig. 5 is the C type dust collector pole of wet cottrell.Fig. 6 is the airflow-distribution board of wet cottrell.

Fig. 7 is the demister of wet cottrell.Fig. 8 is the side view of Fig. 7.

Fig. 9 is a wet cottrell electrostatic precipitator schematic diagram.

Among the figure 1 is insulator chamber, the 2nd, the wet cottrell overhead guard, the 3rd, the wet cottrell back timber, the 4th, spray equipment, the 5th, the trumpet type import, the 6th, airflow-distribution board, the 7th, stair, the 8th, purify the back gas discharge outlet, the 9th, the exhausting blower fan, the 10th, demister, the 11st, spray equipment, the 12nd, clean-out hatch, the 13rd, liquid outlet, the 14th, airflow-distribution board, the 15th, band steel barb type corona discharge electrode, the 16th, 480C type dust collector pole, the 17th, import and export reinforcing frame, the 18th, import and export ring flange, the 19th, the deduster bottom girder, the 20th, the funnel type guiding device, the 21st, unloading valve, 22 wet cottrell bases, the 23rd, corona discharge electrode, the 24th, electronics, the 25th, ion, the 26th, dust granules, the 27th, dust collector pole.

The specific embodiment:

Contrast accompanying drawing

1,2,3, its structure is by wet cottrell overhead guard 2, wet cottrell back timber 3, trumpet type import 5, stair 7, trumpet type is imported and exported reinforcing frame 17, wet cottrell bottom girder 19, wet cottrell basis 22 constitutes the shell of deduster, corona discharge electrode 15 is installed in the wet cottrell by being connected rod member with the dust collector pole utmost point 16, insulator chamber 1 is installed on the wet cottrell back timber 3 and by electric cleaner overhead guard 2 and covers, airflow-distribution board 6 is installed in the electrostatic precipitator air inlet, funnel type guiding device 20 is installed on the wet cottrell bottom girder 19, and unloading valve 21 is installed on funnel type guiding device 20 exit bottom.

During work, the tail gas of high-temp waste gas after the cyclone separator first separation purifies by the trumpet type import 5 that pipeline enters wet cottrell, passes through airflow-distribution board 6 then, make the air-flow that contains dust more even stable, thereby help improving efficiency of dust collection.Dust just can be adsorbed by comprehensive function by charged drop after entering deduster, and directed movement is to dust collector pole 16 in the electric field between corona discharge electrode 15 and dust collector pole 16 then, and corona discharge electrode and dust collector pole produce high voltage electric field after by a series of power devices such as insulator chambers 1.Band point drop combines with dust by electric field force and is attracted to dust collector pole, makes because gravity effect drop falls into funnel type guiding device 20, by unloading valve 21 liquid in the funnel type guiding device 20 and wet dust is discharged processing then.Gas enters in the gas cleaning plant after electrostatic precipitator is handled, and pernicious gas utilization chemism is handled.Be provided with demister and exhausting blower fan etc. in deduster outlet inside at last, further improve clean-up effect.

For the convenience of operations such as keeping in repair, deduster also is provided with stair 7 and clean-out hatch 12 for operations of being correlated with such as Technical Maintenance Staffs.

Contrast accompanying drawing 4, its structure is the band steel barbed nail corona electrode, by High voltage power supply equipment it being powered during work makes it produce high pressure at the tip, thereby makes surrounding air produce corona phenomenon, makes air ionization so that give atomized drop charged, thereby realizes electrostatic precipitation.

Contrast accompanying drawing 5, its structure is the dust collector pole that is similar to " C ", so be called " C " type dust collector pole, figure five is its view in transverse section.By High voltage power supply equipment it is powered during work, thereby between this C type dust collector pole and above-mentioned band steel barbed nail corona electrode, form inhomogeneous field, drop and the effect owing to electric field force in this electric field of wooden dust after charged will realize electrostatic precipitation to the electrode direction directed movement.

Contrast accompanying drawing 6, its structure is the airflow-distribution board of being made by the plate of perforate.The perforate scheme is to increase to Rb by the center bore size gradually from Ra, and each circle aperture, place equates, and the aperture increases gradually from inner ring to outer ring, and the contiguous outer ring of a certain circle surrounds this circle with equally spaced form.Adopting this kind scheme perforate purpose is in order to make the dust-contained airflow that flows through can reach more stable and uniform state, thereby helps improving efficiency of dust collection.

Contrast accompanying drawing 7,8, its structure is the wet cottrell demister.The device that diameter enlarges gradually is installed on gas purifying equipment top, air velocity is reduced, drop is descended by deadweight by the increase of basal area.

Contrast accompanying drawing 9, when applying the negative pole high-voltage dc voltage between two electrodes, the two poles of the earth just constitute inhomogeneous field during work, corona discharge electrode 23 corona discharges.Must take away electric charge and form charged drop when water smoke directly sprays to corona discharge electrode, they can be further charged at the nearly ionized region quilt of corona discharge simultaneously.After drop was charged, they had electrostatic attraction (Coulomb force) to the dust of band opposite polarity electric charge, and not charged dust is had image force, and charged drop rises with the raising of drop charge-mass ratio (ratio of carried charge and water quality) to the capture rate of dust.Charged drop combines the back under the effect of high voltage electric field with dust, move to dust collector pole.In electrostatic field, the power on charged drop and the dust granules of acting on mainly contains the cohesiveness Fn of Coulomb force F, ion wind-force Fv, drop and grit gravity P, drop and particle and the air buoyancy F1 to drop and dust.The action direction of these power is inconsistent, and when F+Fv+Fn＞F1+P, charged drop and grit will arrive at anode (dust collecting electrode) rapidly, thereby can realize the purification to dust.Behind charged drop and dust arrival dust collector pole 27, just can on the dust collector pole surface, condense and gutter down, it is electrically charged and trickle down attached to the dust collector pole surface and to the funnel type guiding device to discharge institute by feat of acting in conjunction charged drop such as mechanical force, Coulomb force, gravity and dust, finishes the process of gathering dust.

Claims

1. the wood-based panel industry wet cottrell is characterized in that the corona discharge electrode and the dust collector pole utmost point join by connecting rod; Insulator chamber in the wet cottrell shell is installed on the wet cottrell back timber and by the deduster overhead guard and covers, the wet cottrell back timber props up by about the deduster column, the deduster column is contained on the wet cottrell basis, airflow-distribution board is installed in the electrostatic precipitator air inlet, the funnel type guiding device is installed on the wet cottrell bottom girder, unloading valve is installed on the exit of funnel type guiding device lower end, the wet cottrell right part is provided with airflow-distribution board, spray equipment is equipped with in the orifice plate top, demister, anti-Water fan is installed in the waste gas outlet successively, deduster is provided with liquid outlet and clean-out hatch, it is that four I-steel are welded in " well " font on two columns of import and export that trumpet type is imported and exported reinforcing frame, imports and exports ring flange and is arranged at the end of wet cottrell trumpet type import and export so that be connected with cleaning shaft.

2. wood-based panel industry wet cottrell according to claim 1 is characterized in that described corona discharge electrode is the band steel barbed nail corona electrode that stainless steel is made by material.

3. wood-based panel industry wet cottrell according to claim 1 is characterized in that described dust collector pole is " C " shape, and forms inhomogeneous field between the band steel barbed nail corona electrode.

4. wood-based panel industry wet cottrell according to claim 1, it is characterized in that described airflow-distribution board made by the plate of perforate, perforate increases to bigger aperture by the center bore size gradually from less aperture, each circle aperture, place equates, and the aperture increases gradually from inner ring to outer ring, and the contiguous outer ring of a certain circle surrounds this circle with equally spaced form.