DE2103022A1 - Electrostatic separator - Google Patents

Description

hoL.io; ·! Construction Corporation, Nev ^T "or!:, II.Y./USA

Sle ^ trof-'tv / l-ische Auseoheldevorrichtungen j.

The 2rriric _t UN3 refers r: icii cuf an electrostatic ^ku::; ~ ⁱ Rch3xdovoi''x i'j;: A in, [j; it is a ^ i 'line to cross it ίιη ^ ο arrange th D? vV ;;, uno -ί-.ir-c: i'Johort ^ n juatten. They befa "': .sich :: iit eier Entforr.unr, from.:. IA ^ oi-i: ^: ei: en individual particles: <. Ub ein: .i gas flow ο-rc: .. ele! - : ': r1 ccrifj o.lor ol ehtrostatinohe // separation. The nit- .jeri ^ :; enerj ^f iin: -olnon TeiJchon liömien from PlUG ^ irji-eibu drip just c'Jer I. exten particles v / is Dinst, Dust, Ru. ", Corridor-j ^ scho or d. ^ L., O; .ij: doc..en Toilcliort ^ u: · Ίυ ;. Garjütro; ii one; ehe .vl. :: ο hon process // "ie doiii Ab ^ arj from a PlÜGsigkeiksbettreriktor or ore roaster,

SAD ORiGtNAt

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usv /. exist. The invention; is'JL;; .a ar .'- cridl-rxr different to the treatment Gasstr ".ve, v; ie R 'i ^ c, ^G;. ~ - ströne of chemical processes ods.:· T ^ n-ig ^ s / ir:);,: i; .. ico ~: ·.; .. processes, and this is particularly useful: au 5: -. E :: into the atmosphere, which contain torn individual T ': .'- Ic ".. on.

Different arrangements of electrical c -er elol · .: ■ - - static separating devices were bichrr - 'rg' ..- beat and are known fjev.'ordon, oinschlie:] icn r: r; .ol or types in which on ele-.:tri3che charged Dr '':;": - ε D" - :. r "-braid or fiber liter folder .. At - .. iiac ^ jn Τ: \". οη are grids, a wire mesh ouor otabe a ^r .'fd ^ r Ur- ^ erstroi:. side of the invited Dr! - '. hte intended. P'-. ^; : Entcohrifton, v / eiche typical different forms show, sinI the Uo patents 3 0 ^ 9 S ^ S, 2 290? 12, 2 9Ο3 14C, 2 ST- C3 ^il , 2 ^ T CC2, 2 322 053, 2? A 2 ^ h, 2 (V \ ^ Kk, 2 t'L · .'Λϊ, 2 593; '7' ⁷ , 2 5G2 1J3 -nd 2 55β 9-2 and the Vt! .-. Λίαί-οη patents 962 '/ 7 ^ and ^ i 4 333.

According to the invention vairde an el ^ _; : * .; ■ -. - _: - -, ■: ..-- jc; "e separating device with a line, in v; iloi.or transversely arranged one or more st-tre of electrical 1 il: ': rer. Wires and provided by perforated plates: ^: '3ho.i .Λ.', ',., Created in which according to the invention ;; "L-" the Px' - .. ton \? R ". ^ - i are arranged and grounded after the wires.

Thus, a gas or steam flow: full; .- ;. LL y: .'iss ^ rier individual particles, polygons consisting of components ν; ic above, described, closed by a pipe. ;;., Which has a similar gas duct .iv / ie a conduit or an elongated container umfa.?t. A first dui'chlöcii-i'tc fl-atte is arranged transversely in the line in such a way that the G'.sstror first runs through the openings in the first plate, v / elehor

BAD ORIGINAL 109831/1977. - _

? -: weehseind next to each other -arranged O, super-rows of yivr.'lclon wires: .ten: -: it distance to one another and secondary perforated plates follow. The flats are grounded u :: Ji die Or ' ^: ' r: ^ -jind r.it an electric or electrostatic charge versoherj sr 3a "a holies voltage potential" wipe Jen I ': ri.jic-r "Ir''] i '. s and the grounded plates maintained v.'ii' .: u: iJ t-.itgerissenen individual particles due to a · -: lo /: ■ -z \ atisehen Ausscheidevcrgangs, in which: the parts..! .ieii v :: n; ":: Wires take up a charge :: ien and unloaded through and on lic plagues, from de: .i Gcsstror :: on iic plates" to be stored. It was found there. " the \ i \ -ν ^λ : .-. plate on the Oberstrorr:;:: cn eggs first plate before de ^l n first wire or .IOR cpotca Ke :: 'substantial proportion of the particles on the first .he of parallel wires very advantageous ic-t, .Ia ■ calibration.. side of the first row of wires ".! - /. hiagern will and se the degree of Sannielv.''efficiency for the particles overall and the removal of the particles auc .ie ··; Gacetrov. will be substantially improved.

i.usr'l; hr ";r;;; - .: examples of the invention are described in more detail in the drawing / iar-erreli; · \\ r -.- v: erler in the following

Fi,:. 1 a Soi ^ enansie'-Tc i ..: Section of an execution number:!,

Fi :. 'L · a plan view i; .i-section, taken along the line 2-2 in Fig .1,

Fig. 1 is an icc.etrical view of a preferred embodiment. ■. : ier shown in Figs. 1 and 2 Sa: .V: .elplatten, and

Fig. Η -ji: ie isc ::] etrisch.e view of a different embodiment and type of 8ai :: i;: el plate, which inclines the associated invariant lines.

BATH ORIGINAL

10 9 8 3 1/19 7

According to Pig. 1, a gaseous or vaporous stream 1 with entrained particulate via a blower or a fan 2 as stream 5 i ⁿ a line 4 is blown, which is aligned in this embodiment of the invention is essentially horizontal and a 'rectangular or quadratic cross-section . The line 4 is connected to earth via an earth wire or connecting rod 5. The gacstroir. The line 4 initially flows through openings located apart in a perforated Sar.imelplatte 6, a plurality of which is arranged in the direction of flow above and adjacent to primary ionizing bars or wires 7. The wires 7 receive an electrical charge or a potential or an electrostatic La.Iunr: with the help of a charge lead wire o, which with de ::. Wire 7 is connected via an insulated connection through the line 4. The: Charging lead wire C is connected to a main high voltage pot or a S ?. mxlschienc Z Γ '.- tontially fed. The busbar comes from a ζ - '-ignel-en Hoc ¹ , voltage source .10, which can be a transformer with a:.: Equal rectifier or clgl. R; cin. The high-voltage: in'iur \ ~. ^R > source 10 leads to the busbar 9 a negative or pc: j '; jm ^r e ^ high-voltage potential, and the second polarity of the high-voltage source 10 can either ^{be grounded via: 1} the Leiturv; 4 or directly. : mm ·: 7; led electrical charge causes, uaT ax imit, torn individual particles in the Gaostro: '·, v; elcbe either liquid droplets or solid particles such as ΠΓ, dust, plugasDhe, haze and fog assume an electrical charge relative to the earth, and part of the individual particles is deposited through the primary saddle plate 0 entlaion and? uf.;: lo;.: e? ·.

The gas stream in line h flows through al;. · Nr ^ liste, -. successively the openings in a more ::, - i'iΊ of iurciilöciier ^ ß * | i secondary collector plates 11 on the Uni ei'fVroiiiseite, between which secondary Ι \ ί ent.i al- or Iiwirjov-

109831/1977 BADORiGfNAL

rods or wires 12 are arranged so that an alternating Row of wires 12 and secondary collector plates 11 is provided. Via secondary lead wires 15, which are isolated from the busbar 9 via an Lead connection through the line to the wires 12, these are supplied with charge or potential. Further Quantities of individual particles are deposited on the collecting plates 11 from the gas stream. A preferred form of the Line 4 is shown in Fig. 1, in which the section 14 on the downstream side progressively increases in cross-sectional area in the direction of the gas flow, so that the linear velocity of the gas flow in the section 14 decreases. The decrease in gas flow rate in the section 14 contributes to the removal of the individual particles by causing the deposited material to drift away again from the collecting plates 11 in the gas flow due to turbulence and high gas velocity. Of the final pure or purified gas stream, which now has no or has a negligible content of entrained individual particles, flows into an output line I5, which protrudes from the section 14 and the gas stream 16 to a suitable use or for release to the atmosphere via e.g. B. leads a not shown shaft.

In Fig. 2 is a plan view in section of the device is shown, which further the arrangement of the perforated or perforated primary collecting plate 6, the additional or secondary collecting plates 11 and the straight rows parallel ionizing bars or wires 7 and 12 between the , "ar.-iLielplatten shows.

Fig. J5 shows a typical collecting plate with circular Openings 17 for the gas flow.

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Fig. K shows another embodiment of a. ". Kimme 1 plate, are in which vertical slots IC provided for the gas stream, wherein the slots Io vorzugsv / eii, e are parallel to the ionizing bars or wires 7, plural marriage beiv chbart and Distance to the assembly point C arranged Min ·.! ..

Numerous alternatives within the scope of the invention will open to those skilled in the art. The lei do :; k and accessories such as the Ik section can be oriented horizontally or vertically, or mounted in an inclined position. In all such cases, four of the collector plates 6 and 11 and the associated ionizing bars or wires 7 and 12 run substantially transversely in the conduit. In some cases, adjacent to wires 7, an a; i: o 3a:. ::. Appropriate knocking or shaking devices or devices are usually provided in practice to intermittently or continuously move or shake the container plates to remove the deposited material. A tapping device can also be provided for the wires 7 and 12. In other examples, the collecting plates and wires can be intermittently washed with a suitable washing liquid such as water or a solvent for the deposited individual particles. In examples where the entrained individual particles in stream 1 are liquid droplets, i:; A continuous discharge of the deposited liquid from the collecting plates 6 and 11 under the influence of gravity will be sufficient. The perforated collecting plates 6 and 11 can be provided with openings which are circular, elliptical, square or triangular, or slots as in Fig. ¹ I- be provided as shown. In some cases, can even Samrnelplatten of a number of flat parallel adjacent

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fjvreifen exist, whereby each stripe is opposed to a. Bar or wire is aligned. In the rr: '.. :: ic, a uniform voltage distribution on different rows of wires 7 and 12 can thus not be produced; v / earth that ?, various electrical throttles c ler igl. are provided. In suitable cases- ■: -; 'ie ¹ on ·: Γ'.ηη r \ ~. electrical potential in half waves or full waves. In many cases the Geb .: V.:c or Jcr L ^r; fter 2 on the lower side of the Vcrrich-Li; n_ · v - ;: r'je-c '.- vi -. ^ rden, cc da "er the contaminated Gcs- st ν'. ä; 'vc" :. \\ ± Q unit sees uni se only purified gas ;; tvisr Dr.::.-pf processed. In power stations, this arrangement is processed in front of;

A 3 - :: 'is; - ^% iel of laboratory tests with the invention .. ^; * cn performance becomes i> r. will be described below.

example

A P: - 'U' device viurde ir.it five parallel rows of ionizing - .; r ^:: .hten verseher, v / obei each row of wires a geerlcto perforated plate Sanr.ue followed a voltage of ^ -.!. 0 I:!.! V v; urde the Turned supplied vmrie the performing: .. it a ^{/>.^:} rrlichen primary Sar: re plate operated before the first row νcn DrUhcen an airflow full raitge- "issener particles. of fly ash dust through the device ick ""'; and the Sa!:; :: elv; measured efficiency. The device then vrarO.e in a: ·! second attempt without the pri: ^v .re 3-.:■·.!..elplatte operated and the Sarnrael efficiency geiüCCEen. The following are the test results

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Fly ash collected per hour

Collect! Plate
No.

Trial no. Ir. With primary collection plate

Gram:;: fj of the total

1 106 15.1 2 244 25.0 149 21.3 4th 118 16.9 5 61 O y O 6th 20th 2.9 total 698 100.0 Feed rate Gram / hour 754 Collect! We efficiency

Experiment no. Without primary sanitary oil plate

Grams ^c / o of the total

237 513.0 163 26.2 ιο4 16.7 97 15.6 OO 3.5

100.0

It can be seen there. ^r ] as a result of the primary collection points 1 in front of the first row of wires of the icing wires, a higher degree of collection efficiency and a larger total amount of removed fly ash have been achieved. The device or unit was operated with perforated Sar .rel plates, the perforation of which consisted of holes 12.7 mm in diameter in a 22 gauge carbon steel plate. The holes were arranged in staggered rows with a total opening area of 4c; j. The air speed was about 1 m / sec. and left dust loading about ^ g / SCF.

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Claims (7)

- 9 claims IJ Electrostatic separation device with a line with wires arranged transversely therein and perforated plates, characterized in that the plates (6, 11) are arranged and grounded before and after the wires (? '). 2. Apparatus according to claim 1, characterized geke η η - ζ. eich η et, since "the wires consist of a plurality of parallel wires ('/, 12). J5. Device according to one of Claims 1 or 2, characterized in that the line (4) is horizontal and the wires (7, 12) and the plates (C, 11) are arranged vertically. 4. Device according to one of claims 1 to ^, characterized in that: "^; the holes (17 ') in the plates (C, 11) are circular openings. 5. Device according to one.;: Of claims 1 to ^, characterized marked because: - the holes in the plates straight slots (lo) parallel to the wires (7j 12) sina. C. An apparatus according to any one of claims 1 to 5 characterized geke * η η ζ 1 e ch η ct, since the plates with -'- EinrichtuLgon as: - are stranded U η '"away on the precipitated particles. 7. Vorriüi.Vmg r.acli einu of claims 1 to C ₃ thereby geke η η ζ ο lehn ο t that the line an increasing 'iuorschnitt (lh, 15) in the direction of dos r; tror: ior; you have raw tic ansscnoid device. 109831 M977 BAD