CN2141329Y - Horizontal angle-bending trough plate type electric dust remover - Google Patents

Abstract

The utility model has the structural feature that the arrangement form that a dust-collection polar plate is parallel to the inflowing direction of the gas in the conventional electric dust remover is changed, and a plurality of tank-shaped dust-collection polar plates with certain angle are alternately and transversely arranged in a working chamber to cause the electric field direction in the dust remover to be basically consistent with the inflowing direction of the dusty gas. The dust removing efficiency the whole equipment can be effectively improved under the condition of keeping the area of the dust-collection polar plates and the gas flow speed.

Description

Horizontal angle-bending trough plate type electric dust remover

The utility model belongs to environmental technology field, particularly a kind of electric cleaner that is used for flue gas ash removal that disposes in coal-burning power plant or other Industrial Stoves place.

Electric cleaner is the cleaner that is provided with dust collector pole (positive pole) plate and discharge electrode (negative pole) plate in a kind of operating room.Its operation principle is: dust collector pole (positive pole) plate earthing, and on discharge electrode (negative pole), apply the negative high voltage electricity with the generation electric field, and corona takes place around maintaining discharge electrode, and make near the gas of discharge electrode produce ionization, generate electronics, anion and cation.When dusty gas entered deduster and passes through electric field, a large amount of electronics and ion will and make it charged with certain probability and dust collision.Charged dust moves to dust collecting pole plate with certain average speed be subjected to the acting in conjunction of electrostatic force, turbulent diffusion power and inertia drift force in electric field after.After charged dust arrives the dust collecting pole plate surface, promptly discharge electric charge.These dust are assembled mutually by the statcoulomb power and the van der Waals' force of residual charge again simultaneously, attached to the surface of dust collecting pole plate.Treat that dust accumulates to after the certain thickness, relend to help the rapping percussion, make dust from the sur-face peeling of dust collecting pole plate and fall into ash bucket.So promptly finished the process of gathering dust substantially of deduster.

Common in the art used electric cleaner mostly is horizontal printed line structure, and its operation principle as shown in Figure 1.In existing equipment, the direction that the plate face of dust collecting pole plate 1 and dusty gas enter the operating room be arranged in parallel.The direction of motion of charged dust in the operating room is the resultant direction of electric field force action direction W and gas flow rate action direction V.But because gas all is in the turbulent motion state in the actual industrial electro deduster, thus charged dust in the actual movement rule in the operating room promptly shown in X trajectory in the accompanying drawing 1.At this moment, charged dust is in by the caused rambling state of turbulent property, and the dust running path almost completely is subjected to the domination of turbulent flow, has only in dust enters the wake boundary district that can work the Coulomb force, and charged dust just is collected.In other words, improve the collection rate of dust, the operating room just must have enough length.Therefore, if will make existing equipment be improved efficiency of dust collection, just can only realize by the plate face area or the reduction electric field gas flow rate that increase dust collecting pole plate, so also the make use of momentum length and the section of necessary increase electric cleaner, cause the steel quantity consumption of equipment to increase, and then caused the raising of electric cleaner cost, the scope of application of equipment is restricted.

The purpose of this utility model is according to existing defective in the prior art, provide a kind of rational in infrastructure, save material, floor space is little and efficiency of dust collection is high horizontal knuckle frid formula electric cleaner.

Technical solution of the present utility model is to change the dust collecting pole plate arrangement form parallel with the gas inflow direction in the conventional electric cleaner, but the some grooved dust collecting pole plates stagger arrangement that will have certain angle is horizontally placed in the operating room, promptly divide ranks dislocation row to be equipped with the unit that many groups are made of dust collecting pole plate and discharge electrode in the operating room, all the inflow direction with dusty gas is vertical for the plate face of dust collecting pole plate in every group of unit.Electric cleaner after this improves, its each the gather dust direction of an electric field of unit and the inflow direction basically identical of dusty gas, can effectively utilize gas flow rate and electric field force impetus like this to charged dust, reduce time and distance that charged dust arrives dust collecting pole plate, increase the effective migration velocity of charged dust.Do not increase under the situation about not reducing at the dust collecting pole plate area, because the raising of migration velocity has increased dust and arrived the probability of dust collecting pole plate, thereby also just improved the efficiency of dust collection of entire equipment with gas flow rate.

A specific embodiment of the present utility model is provided by accompanying drawing 2.

With reference to accompanying drawing, in the operating room 3 of this electric cleaner, has the unit that many groups are combined by dust collecting pole plate 1 and discharge electrode 2.Dust collecting pole plate 1 is horizontally placed in the operating room 3, and its cross section is terraced grooved.The groove of dust collecting pole plate 1 satisfies relational expression 0＜α＜90 ° along the value of the angle α between the extended line of length of side B and bottom land length of side A, and the size at this α angle directly has influence on the intensity that dusty gas flows to the dust-collecting efficiency in grooved pole plate 1 front and flows through the free vortex at pole plate 1 back side.The spacing E(heteropole distance of discharge electrode 2 and dust collecting pole plate 1) be 120～300mm.The reasonable apolegamy of α angle and E parameter can guarantee that the surface of dust collecting pole plate 1 can form uniform CURRENT DISTRIBUTION, reduces the generation of back corona phenomenon.The groove of dust collecting pole plate 1 is 0.15～0.60:1 along the length ratio of length of side B and bottom land length of side A.The unit of respectively organizing in the working chamber 3 is crisscross arranged by ranks, and the spacing of dust collecting pole plate 1 is D in wherein every adjacent column unit, and the nearest spacing of two dust collecting pole plates, 1 knuckle trough rim is C in every adjacent lines unit, and the ratio of D and C is 1:0.5～1.4.C/D is called the gas compression ratio, and it directly affects hydrodynamic characteristic and the deduster body resistance of dusty gas when flowing through the grooved dust collecting pole plate.In the course of work, when dusty gas was flowed through two knuckle frids, 1 beeline space C, the flow velocity of gas increased, thereby had also just further increased the charged chance of collision of ion and dust.Along with the increase of circulation area, gas spreads along two knuckle frids 1, and forms stronger free vortex at its back side, and the relative velocity of dust and gas flow is increased.The formation of free vortex has also been strengthened the separation of dust simultaneously with concentrated, and under the effect of vortex and Coulomb force, charged dust also attracted to the back side of knuckle frid, has so also just further increased the effective rate of utilization of knuckle frid.

Electric cleaner device described in the utility model can be widely used in the flue gas ash removal of Small And Medium Capacity boiler of coal-burning power plant and the flue gas ash removal of other Industrial Stoves, is particularly suitable for occasion strict in those environmental protection requirements and that production site is restricted again and uses. Compared with prior art, device described in the utility model can obtain higher efficiency of dust collection under identical corona discharge power, and the steel quantity consumption that has overcome conventional products is big, floor space reaches greatly the high deficiency of investment, has obvious Social benefit and economic benefit.

Claims (5)

1, a kind of electric cleaner that is used for the environmental technology field flue gas ash removal, has the operating room 3 that is provided with dust collector pole (positive pole) plate 1 and discharge electrode (negative pole) 2 in, it is characterized in that in working chamber 3 dividing ranks dislocation row to be equipped with the unit that many groups are made of dust collecting pole plate 1 and discharge electrode 2, all the inflow direction with dusty gas is vertical for the plate face of dust collecting pole plate 1 in every group of unit.

2, as the electric cleaner of claim 1 regulation, it is characterized in that the cross section of described dust collecting pole plate 1 is terraced grooved.

3, as the electric cleaners of claim 1,2 regulations, the groove that it is characterized in that described dust collecting pole plate 1 satisfies relational expression along the value of the angle α between the extended line of length of side B and bottom land length of side A: 0＜α＜90 °, B is 0.15～0.60:1 with the length ratio of A.

4,, it is characterized in that two dust collector pole board slots in the space D of dust collecting pole plate in the adjacent column unit and the adjacent lines unit are 1:0.5～1.4 along the length ratio of the nearest spacing C on limit as the electric cleaners of claim 1,2 regulations.

5,, it is characterized in that two dust collector pole board slots in the space D of dust collecting pole plate in the adjacent column unit and the adjacent lines unit are 1:0.5～1.4 along the length ratio of the nearest spacing C on limit as the electric cleaner of claim 3 regulation.