CN212441626U - Uniform distribution plate, wet-type electric dust remover and flue gas discharge device - Google Patents

Abstract

The utility model provides an equipartition board, wet-type electrostatic precipitator and fume emission device, including first region and second region. The first area is circular, and a plurality of first holes are uniformly formed in the first area; the second area is circular and is arranged outside the first area in an enclosing manner; the second area is provided with at least one circle of second holes, and the area of each second hole is larger than that of each first hole. The reducing section of wet-type electrostatic precipitator entrance is located to the equipartition board, the desulfurizing tower top is located to the reducing section, in operation, the flue gas gets into the reducing section from the desulfurizing tower of below, the regional trompil of second is greater than the regional trompil of first, the air current resistance is reduced to the second region by first region, pass through the equipartition board through the second region with the partial air current at guide middle part, partial air current passes through the equipartition board through the first region, make the flue gas at the regional evenly distributed of first region and second, make the air current evenly get into the dust remover body on upper portion, flow field distribution is even in the dust remover, the electric field is interior dust electric charge even, high dust collection efficiency.

Description

Uniform distribution plate, wet-type electric dust remover and flue gas discharge device

Technical Field

The utility model relates to a flue gas treatment technical field, concretely relates to equipartition board, wet-type electrostatic precipitator and flue gas discharging device.

Background

At present, in newly built units of thermal power plants, the ultra-low emission standard is required to be achieved. Therefore, a wet electric dust collector must be added on the upper part of the desulfurizing tower, and the flue gas directly enters the wet electric dust collector on the top of the desulfurizing tower upwards after passing through the desulfurizing tower. Because wet-type electrostatic precipitator all is big than the diameter of desulfurizing tower usually, wet-type electrostatic precipitator includes reducing section and dust remover body, connect through a reducing section between desulfurizing tower and the dust remover body, this reducing section generally all is the inclination of 60 degrees, is a big back taper body on the small end down, the straight section entering this reducing section of flue gas from the desulfurizing tower, the dust remover body on entering upper portion through the reducing section again, because the setting of reducing section, the flue gas can't evenly get into the dust remover body on upper portion through this reducing section.

The distribution of the flow field in the vertical flow wet electric dust remover is one of important factors influencing the dust removal efficiency of the electric dust remover, and if the distribution of the airflow flow field in the electric field is uneven, the charge of dust in the electric field is uneven, so that the dust removal efficiency is influenced. Therefore, the uniform distribution plate is required to be arranged on the diameter-changing section at the inlet of the wet electric dust collector.

The circular equipartition board among the prior art generally sets up the round hole on the face, and the percent opening on the face is the same to face edge by the centre of a circle, and the resistance that receives when the air current passes through the equipartition board is the same along the radial of equipartition board, sets up the equipartition board of this structure at the reducing section, will lead to the air current that the reducing section middle part passes through many, and the edge passes through the air current few, and the flue gas can not evenly get into the dust remover body on upper portion.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art the defect that the flue gas can't evenly get into upper portion wet-type electrostatic precipitator by the reducing section.

Therefore, the utility model provides an equipartition plate, include

The first area is circular, and the diameter of the first area is the same as the inner diameter of the desulfurizing tower; a plurality of first holes with the same shape and size are uniformly formed in the first area;

the second area is in a ring shape and surrounds the first area; the second area is provided with at least one circle of second holes, and the area of each second hole is larger than that of each first hole.

Optionally, in the above uniform distribution plate, the second hole has at least two circles, and the area of a single second hole located in the outer circle is larger than the area of a single second hole located in the inner circle.

Optionally, in the above uniform distribution plate, the second holes have at least three circles, and the area of a single second hole gradually increases from inside to outside.

Optionally, the areas of the second holes on the same ring are the same.

Optionally, in the above uniform distribution plate, the cross section of the second hole is elliptical.

Optionally, in the above uniform distribution plate, the cross section of the second hole is circular.

Optionally, in the above uniform distribution plate, the second holes are radially distributed on the second region.

Optionally, in the above uniform distribution plate, the first hole is a circular hole.

The utility model provides a wet-type electrostatic precipitator, be in including dust remover body, connection the reducing section and any one of at least one the above-mentioned of dust remover body below the equipartition board, the equipartition board is located in the reducing section.

The utility model provides a flue gas discharging equipment, including foretell wet-type electrostatic precipitator and desulfurizing tower, the reducing section is located the desulfurizing tower top.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an equipartition board, including first region and second region. The first area is circular, the diameter of the first area is the same as the inner diameter of the desulfurizing tower, and a plurality of first holes with the same shape and size are uniformly formed in the first area; the second area is circular and is arranged outside the first area in an enclosing manner; the second area is provided with at least one circle of second holes, and the area of each second hole is larger than that of each first hole.

The uniform distribution plate is arranged on the reducing section at the inlet of the wet electric precipitator, the reducing section is arranged at the top of the desulfurizing tower, when the wet electric precipitator works, flue gas enters the reducing section from the desulfurizing tower below, the diameter of the first area is the same as the inner diameter of the desulfurizing tower, and the first holes on the first area are the same in shape and size and are uniformly distributed, so that the airflow can be uniformly distributed in the first area; the second area is located the desulfurizing tower internal diameter projection outside, a plurality of second holes enclose to be established outside the first area, the area of single first hole that the area of single second hole is greater than, the second area trompil is greater than the first area trompil, the trompil is bigger, the air current resistance is less, the air current resistance reduces to the second area by the first area, pass through the equipartition board through the second area with partial air current in guide middle part, partial air current passes through the equipartition board through the first area, make the flue gas at first area and the regional evenly distributed of second, make the air current evenly get into the dust remover body on upper portion, flow field distribution is even in the dust remover, the powder electric charge is even in the electric field, dust collection efficiency is high.

2. When the flue gas discharge device provided by the utility model works, flue gas enters the reducer section from the lower desulfurizing tower, and the diameter of the first area of the uniform distribution plate is the same as the inner diameter of the desulfurizing tower; the second area is positioned outside the inner diameter projection of the desulfurizing tower, the opening of the second area is larger than that of the first area, the area of the second hole is gradually increased from inside to outside and is radial, the airflow guiding effect is good, and the airflow resistance is reduced from the first area to the second area, so that the airflow is uniformly distributed in the first area and the second area; and the resistance of the air flow is gradually reduced from inside to outside in the second area, so that the air flow is uniformly distributed in the second area, the flue gas uniformly enters the dust remover body on the upper part along the whole plate surface direction of the uniform distribution plate, the flow field in the dust remover is uniformly distributed, the charge of the dust in the electric field is uniform, and the dust removal efficiency is high. Two equipartition boards about setting up, the air current guide effect is better, and air current distribution is better even.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an even distribution plate provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of a flue gas discharge device provided in embodiment 2;

FIG. 3 is a top view of the wet electrostatic precipitator;

description of reference numerals:

1-uniformly distributing plates; 11-a first region; 111-a first hole; 12-a second region; 121-a second aperture; 21-a dust collector body; 22-a reducer section; 23-an insulating box; 24-a first connection segment; and 3-a desulfurizing tower.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides an evenly-distributing plate, as shown in fig. 1, which includes a first region 11 and a second region 12.

The first area 11 is circular, the diameter of the first area 11 is the same as the inner diameter of the desulfurizing tower 3, and a plurality of first holes 111 with the same shape and size are uniformly formed in the first area 11; for example, the second hole 121 is a circular hole.

The second area 12 is circular and is arranged around the first area 11; the second area 12 is provided with three circles of second holes 121, the second holes 121 are circular holes, the area of a single second hole 121 is larger than that of a single first hole 111, the areas of the second holes 121 located in the same circle are the same, the area of the single second hole 121 is gradually increased from inside to outside, and the second holes 121 located in any circle are evenly distributed on the same circle to evenly guide the airflow to enter the second area 12. The first hole 111 and the second hole 121 are both round holes, so that holes can be conveniently formed.

In the second region 12, the area of the second holes 121 increases gradually from the inside to the outside in the radial direction, and the second holes 121 are distributed radially in the second region 12. The area of second hole 121 increases gradually and is radial from inside to outside, and the air current guide effect is good, can make the air current at the regional 12 more evenly distributed of second, makes the air current get into the dust remover body 21 on upper portion more evenly, further promotes dust removal effect.

The uniform distribution plate 1 of the structure is arranged on the diameter-changing section 22 at the inlet of the wet electric precipitator, the diameter-changing section 22 is arranged at the top of the desulfurizing tower 3, when the wet electric precipitator works, flue gas enters the diameter-changing section 22 from the desulfurizing tower 3 below, the diameter of the first area 11 is the same as the inner diameter of the desulfurizing tower 3, and the first holes 111 are the same in shape and size and are uniformly distributed, so that air flow can be uniformly distributed in the first area 11; the second area 12 is located outside the inner diameter projection of the desulfurizing tower 3, the plurality of second holes 121 are arranged outside the first area 11 in a surrounding mode, the area of each second hole 121 is larger than that of each first hole 111, the holes of the second area 12 are larger than those of the first area 11, airflow resistance is reduced from the first area 11 to the second area 12, partial airflow in the middle is guided to pass through the distribution plate 1 through the second area 12, partial airflow passes through the distribution plate 1 through the first area 11, smoke is uniformly distributed in the first area 11 and the second area 12, the airflow uniformly enters the dust remover body 21 on the upper portion, the flow field distribution in the dust remover is uniform, the charge of dust in the electric field is uniform, and the dust removing efficiency is high.

As a first alternative embodiment of the example, the cross section of the second hole 121 may also be oval, triangular, quadrangular, pentagonal, hexagonal, etc.; or when the cross section of the second hole 121 can also be in any closed figure surrounded by arc segments and straight segments, as long as the area of the second hole 121 is larger than that of the first hole 111, so that the airflow resistance of the second area 12 is smaller than that of the first area 11, and part of the airflow can be guided to enter the second area 12, so that the airflow is uniformly distributed in the first area 11 and the second area 12.

As a second alternative embodiment of the embodiment, the second hole 121 may be provided with one turn, two turns, four turns, five turns, etc., and the specific number of turns may be set according to the difference between the inner diameter of the actual desulfurizing tower 3 and the inner diameter of the reducing section 22.

As a modification, the cross section of the first hole 111 may have any other shape, such as a triangle, a quadrangle, a pentagon, a hexagon, etc., and the shape is not particularly limited as long as the shape and the size of the first hole 111 in the first region 11 are the same, so that the airflow is uniformly distributed in the first region 11.

Example 2

The embodiment provides a flue gas discharge device, as shown in fig. 2, which comprises a wet electric dust collector and a desulfurizing tower 3.

Wherein, wet-type electrostatic precipitator includes the equipartition board 1 in two embodiments 1, dust remover body 21 and establishes the reducing section 22 in dust remover body 21 below. The two uniform distribution plates 1 are arranged in the reducer section 22 at intervals up and down. The external diameter of dust remover body 21 is greater than desulfurizing tower 3 external diameter, and reducing section 22 is the round platform of inversion, and its external diameter is done for declining gradually from top to bottom, and reducing section 22 sets up in order to connect desulfurizing tower 3 and dust remover body 21 at desulfurizing tower 3 top.

When the device works, flue gas enters the reducer section 22 from the lower desulfurizing tower 3, and the diameter of the first area 11 of the uniform distribution plate 1 is the same as the inner diameter of the desulfurizing tower 3; the second area 12 is positioned outside the inner diameter projection of the desulfurizing tower 3, the opening of the second area 12 is larger than the opening of the first area 11, the area of the second hole 121 is gradually increased from inside to outside and is radial, the airflow guiding effect is good, and the airflow resistance is reduced from the first area 11 to the second area 12, so that the airflow is uniformly distributed in the first area 11 and the second area 12; and the resistance of the air flow is gradually reduced from inside to outside in the second area 12, so that the air flow is uniformly distributed in the second area 12, the flue gas uniformly enters the dust remover body 21 on the upper part along the whole plate surface direction of the uniform distribution plate 1, the flow field in the dust remover is uniformly distributed, the charge of the dust in the electric field is uniform, and the dust removal efficiency is high. Two equipartition boards 1 about setting up, the air current guide effect is better, and air current distribution is better even.

Referring to fig. 2 and 3, the wet electric precipitator further includes a first connection section 24 and an insulation box 23 (the insulation box 23 is not shown in fig. 2). The top of the dust collector body 21 is provided with a bearing surface, a truss is arranged on the bearing surface, the first connecting section 24 is fixedly welded on the truss on the bearing surface, and a first gap exists between the outer edge of the bottom of the first connecting section 24 and the outer edge of the bearing surface.

The outer contour of the bottom end of the first connecting section 24 is regular octagon, and the bearing surface at the top of the dust collector body 21 is circular, referring to fig. 3, because of the arrangement of the first gap, an annular bearing surface is formed between the outer edge of the bottom of the first connecting section 24 and the outer edge of the bearing surface, and a plurality of insulation boxes 23 are annularly arranged on the annular bearing surface.

Wet-type electrostatic precipitator passes through the power and makes high-voltage electrostatic field inside the equipment, and the electrostatic action between the negative pole makes the dust electrified in the flue gas to release the electric charge at the positive pole and catch the dust, inside negative plate and the anode plate of being equipped with of dust remover body 21. The top of the wet electric dust collector is provided with a high-voltage power supply, and current is led into the negative plate and the positive plate inside the dust collector body 21 through the suspension rod through the insulation box 23.

In the prior art, the cross sectional area of the bottom end of the first connecting section 24 is the same as the area of the bearing surface at the top of the dust remover body 21, and the bottom end of the first connecting section 24 completely covers the bearing surface; when the insulation box 23 needs to be overhauled, a person climbs onto the bearing surface at the top of the dust remover body 21 to operate, and compared with the operation on a support arranged on the outer side of the dust remover body 21, the operation safety is high.

The truss is a steel truss, and a plurality of linear rods are arranged at the top end of the truss. The cross-sectional area of the first connecting section 24 gradually increases from top to bottom, and referring to fig. 3, the outline of the bottom end of the first connecting section 24 is regular octagon, the outline of the top end of the first connecting section 24 is circular, the bottom end of the first connecting section 24 is welded at the top end of the truss, and the chimney is welded on the first connecting section 24.

Because the top end of the steel truss is provided with a plurality of linear rods, the outer contour of the bottom end of the first connecting section 24 is regular octagon, each side of the bottom end of the first connecting section 24 is a linear side, compared with the structure that the bottom end of the first connecting section 24 is circular,

the straight line edge and the straight line rod at the top of the truss are easy to butt joint and position, so that the straight line edge is conveniently welded on the connecting frame, and the cost is saved; and after the welding is finished, also conveniently set up the reinforcing beam in order to increase the intensity of link and first linkage segment 24 along the straight line limit of first connecting portion outward, improve device stability.

The chimney, the wet electric dust collector and the desulfurizing tower 3 are coaxially arranged. The outer diameter of the dust remover body 21 is larger than that of the chimney, the diameter of the chimney is small, the weight is light, and the integral rigidity and stability of the dust remover are guaranteed. The chimney is welded on the first connecting section 24, the chimney is connected with the dust remover body 21 through the first connecting section 24, the first connecting section 24 is in a round table shape, the cross section area of the first connecting section is gradually increased from top to bottom, and the stability is good; when the smoke discharging device works, smoke flows in a one-way mode from bottom to top, the diameter of the dust remover body 21 is larger than that of a chimney, and the smoke is gradually collected to the middle part from bottom to top by the first connecting section 24 which is gradually reduced from top to bottom and enters the chimney to be discharged.

The chimney, the wet electric dust collector and the desulfurizing tower 3 are coaxially arranged, the flue gas flow field is optimal, the integral resistance of the device is small, the flue gas can flow from bottom to top in a one-way mode, and the desulfurizing and dedusting efficiency is high. Chimney, wet-type electrostatic precipitator and the vertical integration stack setting of desulfurizing tower 3, the saving land resource.

As a modified embodiment, the number of the uniform distribution plates 1 arranged in the variable diameter section 22 may also be one, three, four, five, and so on.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. An even distribution plate is characterized by comprising

A first zone (11) which is circular, the diameter of the first zone (11) is the same as the inner diameter of the desulfurizing tower (3); a plurality of first holes (111) with the same shape and size are uniformly formed in the first area (11);

a second region (12) having a circular ring shape, the second region (12) being surrounded by the first region (11); at least one circle of second holes (121) are formed in the second area (12), and the area of a single second hole (121) is larger than that of a single first hole (111).

2. The distribution plate of claim 1, wherein the second holes (121) have at least two turns, the area of a single second hole (121) located at the outer turn being larger than the area of a single second hole (121) located at the inner turn.

3. The distribution plate of claim 2, wherein the second holes (121) have at least three turns, the area of a single second hole (121) increasing from the inside towards the outside.

4. The distribution plate according to any of claims 1-3, wherein the area of each of the second holes (121) located on the same turn is the same.

5. The distribution plate according to any of claims 1-3, wherein the second hole (121) is oval in cross-section.

6. The distribution plate according to any of claims 1-3, wherein the second hole (121) is circular in cross-section.

7. -the distribution plate according to any of claims 1 to 3, characterized in that the second holes (121) are radially distributed on the second zone (12).

8. The distribution plate according to any of claims 1-3, wherein the first hole (111) is a circular hole.

9. A wet-type electric dust collector, comprising a dust collector body (21), a reducing section (22) connected below the dust collector body (21), and at least one uniform distribution plate (1) as claimed in any one of claims 1 to 8, wherein the uniform distribution plate is arranged in the reducing section (22).

10. A fume extractor, characterized in that it comprises a wet electric precipitator and a desulfurization tower (3) according to claim 9, said reducer section (22) being arranged at the top of said desulfurization tower (3).

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