CN2155948Y

CN2155948Y - Improved electric dust remover for preventing smoke dust from flying again

Info

Publication number: CN2155948Y
Application number: CN 93201332
Authority: CN
Inventors: 黄春官
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-15
Filing date: 1993-01-15
Publication date: 1994-02-16
Anticipated expiration: 2003-01-15

Abstract

An improved electric dust collector capable of preventing smoke dust from flying again aims to solve the problems of local secondary dust flying and local short-circuit airflow caused by a flying device. The technical scheme of the utility model be in the constitution prevent to fly upward the trough plate below of device again add the ash bucket or widen the ash bucket, perhaps with prevent to fly upward the device again and replace last electric field, make under the trough plate along inserting the ash bucket, also can increase the row number of trough plate, form multistage maze or airflow channel. The utility model discloses thoroughly eliminate the phenomenon of local secondary raise dust and the local short circuit of air current, make electrostatic precipitator's overall dust collection efficiency improve 0.5 ~ 2.0 percentage point, make the smoke and dust percent of passage reduce 20% ~ 70% in other words.

Description

Improved electric dust remover for dust reflying

The utility model relates to electric cleaner.

The widely used horizontal electrostatic precipitator of every profession and trade (comprising cottrell) is provided with one group of double trough plate at outlet flue gas case by last electric field one side and prevents the reentrainment of dust device, and is quite general at present, and to preventing that reentrainment of dust from having certain effect.But because the trough plate lower edge all is located at the top of the tilting base plate of outlet smoke box, and both gaps system outlet smoke box deposition flue dust flows to the passage of ash bucket, and there is following problem in this structure: one, this structure prevent that flue dust from flying upward again and can cause the local secondary airborne dust.Because passage too narrow then dust in trough plate lower edge is detained, reentrainment of dust when trough plate gap high velocity air passes through: if leave the spacing that dust is discharged smoothly, flue gas does not produce partial short-circuit on this has the passage of trough plate choked flow, not only lose the effect that trough plate " makes a final check ", the flue dust that the rapping trough plate has been captured " is sent into " in the short circuit air flow on the contrary, unintentionally " manufacturing " reentrainment of dust.Two, the flue gas that the dust content of last electric field discharge is the highest forms the partial short-circuit air-flow at last electric field place.Because when dust collecting pole plate is subjected to rapping, most of dust layer falls with becoming piece, and some special in small, broken bits produces secondary fly-up, and charged again in the electric field of back, capture, perhaps, some grit needs twice above charged, deposition of repetition, and rapping process just falls into ash bucket.Because repeatedly charged dust sedimentation under the gravity effect, the rule of laying dust also is a upper-thin-lower-thick on the last electric field dust collecting pole plate, leaves the contained flue dust of flue gas of last electric field and then goes up few many down.Be in the highest flue gas of dust-laden of lower floor, the danger of the air-flow of partial short-circuit, thereby reentrainment of dust just is bigger.Three, can't tackle last electric field the flying upward again that fine dust causes because of ash bucket leaks out of shaking.

The purpose of this utility model be to electric cleaner prevent that flying upward device again improves, a kind of thorough elimination local secondary airborne dust is provided, improve and to prevent to fly upward again the efficient of device to improve the modified electric cleaner of overall efficiency of dust collection.

The technical solution of the utility model is to set up ash bucket or widen ash bucket to prevent that maybe flying upward device again replaces last electric field below formation prevents to fly upward the trough plate of device again, make the trough plate lower edge insert ash bucket top, also can increase row's number of trough plate, form multistage labyrinth type gas channel.

Technique effect of the present utility model is: thoroughly eliminated the local secondary airborne dust that prevents to fly upward device again and caused, stopped the generation of air-flow partial short-circuit phenomenon at all, make last electric field and prevent to fly upward again device and be combined into a kind of special dual zone type electric cleaner, make the overall efficiency of dust collection of electric cleaner improve 0.5～2.0 percentage point, be equivalent to make the flue dust percent of pass to reduce by 20%～70%.Under equal total dust-collecting efficiency condition, can also suitably reduce electric field dust collecting pole plate area, save the electric field electricity consumption.

Fig. 1 is the electric cleaner structural representation before embodiment 1 improves;

Fig. 2 is the electric cleaner structural representation after embodiment 1 improves;

Fig. 3 is the electric cleaner structural representation before embodiment 2 improves;

Fig. 4 is the electric cleaner structural representation after embodiment 2 improves;

Trough plate cross sectional arrangement figure before improving when Fig. 5 is the U type for trough plate;

Trough plate cross sectional arrangement figure before improving when Fig. 6 is the C type for trough plate;

When Fig. 7 is the C type for trough plate, does not increase row's number and improve back trough plate cross sectional arrangement figure;

When Fig. 8 is the U type for trough plate, when increasing row's number N=2, trough plate cross sectional arrangement figure;

Fig. 9 is the U type for trough plate, when increasing row's number N=4, and trough plate cross sectional arrangement figure;

Figure 10 is the C type for trough plate, when increasing row's number N=4, and trough plate cross sectional arrangement figure;

Figure 11 is the electric cleaner structural representation after embodiment 4 improves.

Embodiment 1:

Referring to Fig. 1, Fig. 2, Fig. 6, shown in Figure 7, electric cleaner by inlet box 3, deflector 6, electric field 2, outlet flue gas case 4, prevent to fly upward device again and ash bucket 5 is formed, this electric duster ash bucket 5 is the C type for how grey bucket type, formation prevent the two row's trough plates 1 that fly upward device again, suppose that ash bucket 5 highly is H, the lower edge of trough plate 1 is located at the top of the tilting base plate 7 of outlet flue gas case 4 before improving, after the improvement, below trough plate 1, set up an ash bucket 5, increase the length of trough plate 1, trough plate 1 lower edge is inserted in the ash bucket 5, and insertion depth is H/6.

Embodiment 2

Referring to Fig. 3, Fig. 4, Fig. 5, shown in Figure 8, electric duster ash bucket 5 is single grey bucket type, trough plate 1 is the U type, supposes that ash bucket 5 highly is H, and the lower edge of trough plate 1 is located at the top of the tilting base plate 7 of outlet flue gas case 4 before improving, after the improvement, ash bucket 5 is widened, trough plate 1 lower edge is inserted in the ash bucket 5, insertion depth is 5/24H, and increase row's number of trough plate 1, recruitment N=2 row.

Embodiment 3

Referring to embodiment 2 and Fig. 9, the degree of depth that ash bucket 5 is inserted in trough plate 1 lower edge is 1/4H, and trough plate increases row's number N=4, and other is identical with embodiment 2.

Embodiment 4

Referring to embodiment 3, Figure 10, Figure 11, trough plate 1 is the C type, with preventing that flying upward device again replaces last electric field, therefore needn't transform ash bucket 5, and other is identical with embodiment 3.This scheme is suitable for the transformation to old deduster, can save the electric field electricity consumption.

Claims

1, a kind of flue dust that prevents flies upward the modified electric cleaner again, it by inlet box (3), deflector (6), electric field (2), outlet flue gas case (4), prevent to fly upward again device and ash bucket (5) is formed, it is characterized in that: set up an ash bucket (5) in trough plate (1) below, prolong trough plate length, make trough plate (1) lower edge insert ash bucket (5), the optimum range of its insertion depth is 1/6～1/4 ash bucket height.

2, electric cleaner according to claim 1 is characterized in that: increase row's number of trough plate (1), the scope that the row who is increased counts N is 1～10.

3, a kind of flue dust that prevents flies upward the modified electric cleaner again, it by inlet box (3), deflector (6), electric field (2), outlet flue gas case (4), prevent to fly upward device again and ash bucket 5 is formed, it is characterized in that: widen ash bucket (5) to trough plate (1) below, prolong trough plate (1) length, make trough plate (1) lower edge insert ash bucket (5), the optimum range of its insertion depth is 1/6～1/4 the ash bucket degree of depth.

4, electric cleaner according to claim 3 is characterized in that: increase row's number of trough plate (1), the scope that the row who is increased counts N is 1～10.

5, a kind of flue dust that prevents flies upward the modified electric cleaner again, it by inlet box (3), deflector (6), electric field (2), outlet flue gas case (4), prevent to fly upward device again and ash bucket 5 is formed, it is characterized in that: remove last electric field (2), prevent to fly upward again device in the setting of the position of last electric field (2), increase the length of trough plate, make its lower edge insert ash bucket (5), the optimum range of its insertion depth is 1/6～1/4 the ash bucket degree of depth.

6, electric cleaner according to claim 5 is characterized in that: increase row's number of trough plate (1), the scope that the row who is increased counts N is 1～10.