CN2920416Y

CN2920416Y - Corona wire of electric dust collector

Info

Publication number: CN2920416Y
Application number: CNU2005201306932U
Authority: CN
Inventors: 杨旻
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-22
Filing date: 2005-12-22
Publication date: 2007-07-11
Anticipated expiration: 2015-12-22

Abstract

The utility model relates to a corona wire of electric dust collector which is wound by two types of metal wires with different diameters, the thick wire being the support main wire and the thin wire being the discharge point. A series of corona wires with different performance are made by varing materials and sizes of the metal wire. The corona wire is characterized in that the structure is a point wire, the wire will not be broken, the weight is light, the cost is low, the corona strength is strong, the stability is good, applicable to electric dust collectors in different sizes, with high dust collection rate.

Description

The corona wire of electric cleaner

Affiliated technical field

The utility model relates to a kind of corona wire of electric cleaner, especially the point-like corona wire.

Background technology

Electric cleaner is to be made of high-voltage DC power supply and deduster body two parts, and the critical piece of electric cleaner body is precipitation anode and corona wire negative electrode two parts, links to each other with negative pole with the positive pole of power supply respectively.The precipitation anode can be forms such as plate shape, square and circle, and corona wire will mate with anode, and the electric field that anode and negative electrode form will satisfy corona discharge steady in a long-term, must be inhomogeneous field, and anode surface is plane or curved surface mostly.This just requires the discharge body surface area of negative electrode the smaller the better, and nearly tens kinds of the existing normal corona wire forms of using roughly can be divided into two classes: line corona line and point-like corona wire.20 beginnings of the century use maximum be astroid it be the representative of line corona line, shortcoming is easy broken string, electric-field intensity is low.Prickle wire, fish-bone line, spring wire etc. are the point-like corona wire, and theory and practice proof dotted lines strength of discharge is higher than the line corona line.Corona wire is made up of main line two parts of point of discharge and support point of discharge.Astroid, jaggies, steel wire rope yarn, spring wire etc. belong to the double corona wire of doing point of discharge of support main line, and fish-bone line, prickle wire are for supporting main line and point of discharge through welding or fastening all-in-one-piece corona wire.Leading indicator for corona wire is exactly that electric-field intensity heavy ion wind can improve dust-collecting efficiency by force, and the mechanical strength height does not break, and parts are indeformable.The line footpath that point of discharge is made by wire rod is thin more good more, gets over Bao Yuehao by the plate that sheet material is made.So thin thin mechanical strength is all poor, get 2 millimeters for making corona wire be out of shape little general linear diameter, thickness of slab is got 1.5 millimeters, the height of point of discharge in use can't change, when somewhere spark discharge being arranged, also can only extract the form of whole corona wire or adjustment positive plate and eliminate discharge, this has just weakened strength of discharge to a certain extent, has strengthened maintenance load.Also will increase the weight of because of corona wire increases the weight of to make bracing frame, the rapping power that deashing is used also will strengthen, when treated substance has chemical attack, corona wire service life of making of carbon steel only one year, be stained with the ash back because of surface corrosion and be difficult to deashing, cause the corona wire hypertrophy, corona blocking.With extraordinary corrosion resistant alloy material manufacturing, cost height.

Electric cleaner is used for mostly from the industrial waste gas separating solids, makes the gas atmosphere that enters up to standard; Also be useful on except that acid mist, water smoke, special occasions such as purify air.These are local because consumption is few, so the corona wire that uses is used for reference the corona wire of large-scale electric cleaner mostly, as rope form and circular corona wire.In electric cleaner commonly used, do not influence the situation of dust-collecting efficiency and often occur yet because of corona wire and anode match, is different as dust content in the flue gas and particle diameter everywhere in a dust-precipitator, air inlet is than gas outlet height, and top is than bottom height, and conventional design can only be taked that a cottrell is divided into several electric fields and power respectively, selected corona wire form is also different, for example 1,2 electric fields are used prickle wire more, and 3 electric field astroids so do not include preferred plan yet.

All equidistant because of the designing requirement of corona wire each point of discharge and anode in an electric field again, as in inlet and outlet, the ash bucket, the maintenance space of locating to be considered as irregularity such as walk on stage can't be used for the double space of gathering dust of doing.

Summary of the invention

In order to improve the mechanical strength of corona wire, normally solve with the method that increases corona wire weight, produce corona shielding, the result is that corona intensity reduces, manufacturing cost improves.The utility model provides a kind of corona wire, does not increase corona wire weight, and also can guarantee has enough mechanical strengths, and the support main line does not break and high corona intensity is arranged, and can mate preferably with the anode of various ways again.This corona wire is in light weight, and the support that needs is also gently installed well, can effectively utilize the space of locating as inlet and outlet, ash bucket etc. to increase the ability of gathering dust.

The technical scheme in the invention for solving the technical problem is: the support main line of making corona wire with rope-like constructed; point of discharge is made the arc-through of likeness in form moon shape and is being supported a string and twisted one-tenth rope of one-tenth on the main line with single thin alloy silk; thin silk corona intensity height; as point of discharge when exceeding corona discharge region and producing spark discharge; when just the galvanic corrosion phenomenon of saying usually takes place; this moment is just disconnected with the arcing of spark discharge; and shorten gradually; till recovering the normal electrical corona; the process of galvanic corrosion is not damaged the support main line; so guarantee that mechanical strength is constant, also can not break.

Supporting main line is (to see Fig. 4 ∮ by the sub-thread diameter ₂) the 2-8 thigh silk and the filament diameter of 0.2-2 millimeter (see Fig. 4 ∮ ₁) a plurality of arc twisteds made of 0.1-1 millimeter become the serial corona wire for the plurality of specifications of different needs, the size of arc, change of shape are just like the variation of moon shape, so claim the string of moon shape corona bank to overlap with the support main line, line segment after the perpendicular bisector of string and arc intersect (is seen the height that a) claims the corona wire point of discharge among Fig. 3, line segment between the adjacent phase discharge point (is seen Fig. 3, b) is changed between the 2-20 millimeter.

Determine a among the figure, b, ∮ according to the character of pending flue gas ₁, ∮ ₂Optimum value, it is that four strands of filament diameters are 1 millimeter that general industry supports main line with electric cleaner, and the point of discharge ring diameter is 0.5 millimeter, and the height of moon shape corona wire and adjacent point of discharge distance are 10 millimeters.Get 1/5 of above-mentioned value when being used for the small electrical deduster of air cleaning.

Select the rope form flexible structure for use because support main line, be convenient to adopt weight with the corona wire tensioning, also available framework tensioning, rope-like constructed can be regarded the assembly of a plurality of springs as, integral body has certain elasticity, therefore can eliminate part or all of corona wire and produce the adverse consequences that degree of tightness changes.Because it is in 360 ° of spaces in axle center that the point of discharge of moon shape is distributed in to support main line uniformly and equidistantly, so (see figure 4) can be used in the electric cleaner of multiple anode form.

The beneficial effects of the utility model are: little with the material amount, can select the valuable alloy of good corrosion resistance for use, low cost of manufacture, the corona discharge electrode system of general electric cleaner comprises that corona wire, corona wire support, corona wire deashing and insulation etc. account for 1/10 of this body weight of dust-precipitator, gross weight reduces 30% approximately after selecting moon shape corona wire for use, positive plate and corona wire also are equipped with in the space of inlet and outlet, ash bucket, increased the ability of gathering dust, make dust-collecting efficiency improve about 20%, moon shape corona wire can be vertically or crosswise fixed on framework, be easy for installation and maintenance.According to the variation of gather dust concentration and particle diameter, the height of the point of discharge of moon shape corona wire is designed to successively decrease synchronously consecutive points apart from also strengthening gradually, makes whole electric cleaner all be in best corona state everywhere.

Description of drawings

Further specify this use is novel below in conjunction with drawings and Examples.

Fig. 1 is the sketch that the utility model uses in electric cleaner.

Fig. 2 is a front view of the present utility model.

Fig. 3 is a side view of the present utility model.

Fig. 4 is that Fig. 2,3 K are to zoomed-in view.

Among the figure 1, air inlet, 2, circular anode, 3, moon shape discharge arc, 4, insulation suspention rod, 5, ash bucket, 6, the support main line of corona wire, 7, high-voltage DC power supply, 8, air outlet, a, point of discharge height, b, adjacent point of discharge distance, ∮ ₁The point of discharge filament diameter, ∮ ₂Support the main line filament diameter.

Moon shape corona wire supports main line (6) and links to each other with circular anode (2) by insulation suspention rod (4) and link to each other with anodal with high voltage source (7) negative pole respectively, dusty gas to be clean enters the surface that deduster dust under the effect of electrostatic force is adsorbed on circular anode (2) from air inlet (1), fall into ash bucket (5) then, purified gas enters atmosphere from air outlet (8).

The specific embodiment:

Shown in Figure 1 an is cross section very 0.3 square metre electric cleaner is expanded into 30 square metres of electric cleaners of an electric field and is used to handle cement plant dryer flue gas, selects for use stainless steel to do positive plate and moon shape corona wire.The discharge scratch start is to make with the monofilament of 0.5 millimeter of diameter, supporting main line selects four strands of filament diameters to be 1 millimeter to twist with the fingers into rope with a plurality of arcs, camber is 10 millimeters, adjacent point of discharge distance is 20 millimeters, than corona current is 0.5mA/m, dust-collecting efficiency 99%, suitable with original two electric fields, use and do not find the broken string phenomenon in 3 years.

Claims

1, a kind of corona wire of electric cleaner is characterized in that: thread by the metal that two kinds of diameter thickness do not wait, thick line is done the support main line; Fine rule is done point of discharge.

2, according to the corona wire of the described electric cleaner of claim 1, it is characterized in that: supporting main line is that the monofilament of 0.2-2 millimeter is formed by 2-8 thigh diameter, and point of discharge is to become the arc of a plurality of moon shapes by the support main line arc-through to be become a string and twists with the fingers into rope form by the filament winding that a diameter is the 0.1-1 millimeter.

3, according to the corona wire of the described electric cleaner of claim 1, it is characterized in that: point of discharge evenly distributes in 360 ° of spaces that with the support main line are axle, and the high distances with consecutive points of point of discharge change in the scope of 2-20 millimeter, form serial point-like corona wire.