CN112756112A

CN112756112A - Dry-type electric dust remover for high-efficiency dust removal through multi-region coupling

Info

Publication number: CN112756112A
Application number: CN202110068379.XA
Authority: CN
Inventors: 孙尊强; 申智勇; 马修元; 舒喜; 叶毅科; 潘云; 张亚伟; 李二欣; 张昕; 顾文浩
Original assignee: Guodian Environmental Protection Research Institute Co Ltd
Current assignee: Guodian Environmental Protection Research Institute Co Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-05-07
Anticipated expiration: 2041-01-19
Also published as: CN112756112B

Abstract

The present invention provides a multi-zone coupling high-efficiency dry electrostatic precipitator. The dry electrostatic precipitator includes an inlet horn, a cover body and an outlet horn. A plurality of electric fields are arranged inside the cover body in sequence, and an anode is arranged in each electric field. Plate and cathode line, the inlet horn and the outlet horn are equipped with dust collection grids, the dust collection grids are evenly arranged by multiple groups of bent grilles, and the multiple groups of bent grilles are arranged along the direction of the flue gas. The upper and lower ends of each group of grilles are installed in the inlet horn and the outlet horn through the rapping frame. The multi-zone coupling high-efficiency dry electrostatic precipitator of the present invention optimizes the existing electrode plates, electrode lines, inlet and outlet horn smoke boxes, flow fields, etc. of the electrostatic precipitator, which can improve the dust collection efficiency and reduce Secondary dust is raised to further reduce the concentration of smoke and dust at the outlet of the electrostatic precipitator; the multi-zone coupling high-efficiency dry electrostatic precipitator of the present invention has less investment, no or less land occupation, low resistance, low energy consumption, and significant efficiency improvement effect. .

Description

Dry-type electric dust remover for high-efficiency dust removal through multi-region coupling

The technical field is as follows:

the invention belongs to the technical field of dry electrostatic dust removal, and particularly relates to a dry electric dust remover for multi-zone coupling high-efficiency dust removal.

Background art:

in the transformation of the ultra-low emission of the smoke dust, the smoke dust emission quality concentration finally meets the requirement of the ultra-low emission limit value through comprehensive measures such as installing a wet electric dust collector on a wet desulphurization clean flue, transforming a desulphurization and dust removal integrated technology, improving the efficiency of the electric dust collector and the like.

In recent years, due to the problems of material and construction management, the fire accident of the wet electric dust collector occurs, and meanwhile, the operation effect of the wet electric dust collector is poor due to the design defects, the higher running power consumption and the over-complex whole environmental protection system of part of the wet electric dust collectors.

The integrated desulfurization and dust removal technology can realize high-efficiency dust removal, but has poor load adaptability, and the concentration of flue dust in and out of desulfurization (namely the outlet of an electric dust collector) cannot be too high. From the aspects of improving the quality of gypsum, improving the desulfurization efficiency and stabilizing the system, it is necessary to further reduce the concentration of smoke dust at the outlet of the electric dust remover. And desulfurization dust removal integration technical transformation and wet-type electrostatic precipitator transform and all need additionally increase a set of device on the basis of original environmental protection facility, and the system is comparatively complicated, and maintenance work volume is great, and the transformation time limit for a project is longer, takes up an area of great, and investment cost and working costs are higher.

At present, the efficiency improving technology of the existing electric dust remover mainly comprises three types:

the first type, conventional capacity expansion (such as heightening of a polar plate, increasing of an electric field, changing from side rapping to top rapping);

second, power source modification (high-frequency power source, pulse power source, etc.);

and the third kind of auxiliary efficiency raising technology including low temperature electric dust removing, electromechanical double area and other technology.

The existing conventional capacity expansion and low-low temperature electric precipitation and electromechanical double-zone auxiliary efficiency improvement technologies have the problems of high investment cost, large occupied area, high operation cost, complex system and the like; the investment cost of the power supply transformation technology is moderate, but the effect of dedusting and efficiency improvement is relatively unobvious. Meanwhile, the guide plate, the air distribution plate and the porous plate arranged in the horn smoke box of the dry electric dust remover have large obstruction to the smoke circulation, the pre-dust removal and dust removal effects are not obvious, and the investment price and the operation and maintenance cost are high.

The invention content is as follows:

aiming at the problems in the prior art, the invention provides a dry-type electric dust remover for multi-zone coupling high-efficiency dust removal, which has the technical scheme that:

the utility model provides a dry-type electrostatic precipitator of high-efficient dust removal of multizone coupling, dry-type electrostatic precipitator includes import loudspeaker, the cover body and export loudspeaker, cover internal portion sets gradually a plurality of electric fields, sets up anode plate and negative pole line in each electric field, import loudspeaker and export loudspeaker are inside all to set up collection dirt bars, collection dirt bars is evenly arranged by the grid that the multiunit was buckled and is formed, and the grid that the multiunit was buckled sets up along flue gas direction, and each upper and lower both ends of organizing the grid are installed in import loudspeaker and export loudspeaker through shaking the frame.

Preferably, the bent grating adopts a V-shaped structure bent at least once;

preferably, the outlet horn is internally bent once to form a structure with a V-shaped section; the grid bent in the inlet horn is bent twice to form a structure with a W-shaped or M-shaped section.

Preferably, the dust collecting grid is divided into 8-12 rows of subareas by a partition plate, each row of subareas is provided with 3 groups of bent grids, and each row of subareas is provided with a rapping frame and is respectively provided with a rapping device.

Preferably, the inlet trumpet and the outlet trumpet are internally provided with a plurality of groups of dust collecting grids at intervals.

Preferably, the spacing is in the range of 100mm to 200 mm.

Preferably, 3 groups of dust collecting grids are arranged at the middle section of the inlet horn at intervals, and each group of dust collecting grids is installed with the inlet horn in a matched mode; 3 groups of dust collecting grids are arranged at the inlet of the outlet horn at intervals, and the overall dimension of each group of dust collecting grids is equivalent to the internal diameter of the mounting position closest to the outlet of the outlet horn.

Preferably, the bent grid adopts a bent multi-hole curved plate structure, wherein the multi-hole curved plate comprises a plurality of curved single bodies, each curved single body comprises a first folded plate and a second folded plate, the first folded plate and the second folded plate are respectively provided with two folding arms, the lower end part of each first folding arm is connected with the upper end part of each second folding arm, the first folded plate and the second folded plate are staggered from top to bottom to form a near-parallelogram connecting surface, and a bending hole is formed in the middle part of each curved single body; all the curved surface single bodies are connected in sequence from top to bottom and from left to right; in the two adjacent curved surface single bodies, the second folding plate of the upper curved surface single body is connected with the first folding plate of the lower curved surface single body through a bending part; in the two adjacent left and right curved surface single bodies, the first folding plates of the two curved surface single bodies are connected with each other, and the second folding plates are connected with each other; the curved surface single bodies are integrally connected to form a porous curved surface plate, and the porous curved surface plate has a homogenization effect on the airflow flowing through the baffling holes.

Preferably, at least one layer of porous curved plate is arranged in the gap between the adjacent electric fields.

Preferably, in the adjacent electric fields, a porous curved plate is adopted in the front electric field as an anode plate, and a porous curved plate is arranged between the adjacent cathode lines in the rear electric field.

Compared with the prior art, the invention has the following beneficial effects:

the dry-type electric dust remover for multi-region coupling high-efficiency dust removal optimizes the aspects of the existing polar plate, polar lines, inlet and outlet horn smoke boxes, flow fields and the like of the electric dust remover, can improve the collection efficiency of smoke dust, reduce secondary dust raising and further reduce the concentration of the smoke dust at the outlet of the electric dust remover; the dry-type electric dust remover for multi-region coupling high-efficiency dust removal has the advantages of low investment, no land occupation or small occupied area, low resistance, low energy consumption and obvious effect improvement.

According to the multi-region coupling high-efficiency dust removal dry type electric dust remover, the multi-layer porous curved surface grids are arranged in the inlet loudspeaker and the outlet loudspeaker, so that the dust collection efficiency of the dry type electrostatic dust remover is effectively improved.

According to the dry-type electric dust remover for multi-region coupling high-efficiency dust removal, the porous curved plate can be coupled to the anode plate and the cathode wire according to different application positions in the electric field in the cover body, so that the dust removal capacity of each region of the electric dust remover is enhanced, the flow field is optimized, the integral specific dust collection area is increased, the dry-type electric dust remover can be designed based on the actual condition of the shell of the original electric dust remover, is flexible and changeable, and is suitable for the efficiency improvement of the electric dust remover of the existing stock unit.

The multi-region coupling efficient dust removal dry-type electric dust remover also divides the cross sections of the inlet loudspeaker and the outlet loudspeaker into a plurality of rows of subareas, a multi-layer porous curved plate structure is respectively arranged in each row of subareas, a vibrator is independently arranged in each row of subareas, and the vibrator is connected with a controller, so that subarea time-sharing vibration is realized, and the dust raising prevention effect is obviously improved.

The multi-region coupling high-efficiency dust removal dry-type electric dust remover can improve the smoke gas flow distribution, increase the specific dust collection area of the electric dust remover, reduce the dust raising entrainment, improve the utilization rate of the shell of the dust remover and finally effectively improve the dust collection efficiency of the dust remover integrally.

The dry-type electric dust remover for multi-region coupling high-efficiency dust removal is flexible, simple and convenient, and is particularly suitable for the transformation of the electric dust remover with a small number of electric fields and a smaller dust collection area.

Drawings

FIG. 1 is a schematic view of the overall structure of a dry electric precipitator in the embodiment;

FIG. 2 is a schematic top view of the dry electric dust collector in the embodiment;

FIG. 3 is a top view of an inlet horn in an embodiment;

FIG. 4 is a schematic view of an inlet horn according to an embodiment;

FIG. 5 is an enlarged view of the layout of FIG. 4;

FIG. 6 is a top view of the outlet horn of the embodiment;

FIG. 7 is a schematic view of an outlet horn according to an embodiment;

FIG. 8 is an enlarged view of the layout of FIG. 7;

FIG. 9 is a schematic top view of a single section of a collection grid inside an outlet horn according to an embodiment;

FIG. 10 is a schematic top view of a single section of a collection grill inside an inlet horn according to an embodiment;

FIG. 11 is a schematic perspective view of a curved porous plate according to an embodiment;

FIG. 12 is a schematic structural view of a curved surface unit in the embodiment;

FIG. 13 is a front view of a curved porous plate according to an embodiment;

in the figure, 1-curved surface monomer; 2-a baffling hole; 3-a first folded plate; 31-a first tip; 4-a second flap; 41-a second tip; 5-an outer structural frame; 6-inlet horn; 7-outlet horn; 8-a dust collecting grid; 91-first electric field; 92-two electric fields; 93-three electric fields; 94-end electric field; 10-clearance; 11-cathode lines; 12-an anode plate; 13-a grid; 14-a rapper.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

The first embodiment is as follows:

the invention discloses a multi-region coupling high-efficiency dust removal dry type electric dust remover, which comprises an inlet horn 6, a cover body and an outlet horn 7, wherein a first electric field 91, a second electric field 92, a third electric field 93 and a last electric field 94 are sequentially arranged in the cover body, an anode plate 12 and a cathode wire 11 are arranged in each electric field, dust collection grids 8 are respectively arranged in the inlet horn 6 and the outlet horn 7, each group of dust collection grids 8 is formed by uniformly arranging a plurality of groups of bent grids 13, the plurality of groups of bent grids 13 are arranged along the smoke direction, and the upper end and the lower end of each group of grids 13 are arranged in the inlet horn 6 and the outlet horn 7 through rapping frames.

Example two:

the further design of this embodiment lies in: in the embodiment, the bent grating adopts a V-shaped structure bent at least once; wherein, as shown in fig. 9, the outlet horn is internally bent once to form a structure with a V-shaped section; as shown in fig. 10, the bent grille inside the inlet trumpet is bent twice to form a structure with a W-shaped or M-shaped cross section. The design strengthens the diversion effect on the flue gas, ensures that the flue gas flows along a curve, and is contacted with the porous curved surface grating for many times, thereby improving the dust collecting effect by collision.

Example three:

the further design of this embodiment lies in: in the embodiment, the dust collecting grid is divided into 8-12 rows of subareas by the partition plates, as shown in fig. 9, each row of subareas is provided with 3 groups of bent grids, each row of subareas is provided with the rapping frame and is respectively provided with the rapper, the design realizes the staggered-time subarea rapping of the dry-type electrostatic precipitator, reduces the rapping raise dust of the precipitator, effectively improves the dust collecting efficiency of the dry-type electrostatic precipitator and reduces the dust escape when the electric field at the end of the precipitator raps.

Example four:

the further design of this embodiment lies in: the inlet loudspeaker and the outlet loudspeaker are internally provided with a plurality of groups of dust collecting grids at intervals, and the interval range is 100-200 mm.

Example five:

the optional design of this embodiment is: in the embodiment, 3 groups of dust collecting grids are arranged at the middle section of the inlet horn at intervals and are used for pre-dedusting, flow guiding and air distribution, and gas entering the dust remover can be promoted to be uniformly distributed, and each group of dust collecting grids is matched with the inlet horn to realize full-section coverage and strengthen the distribution effect on flue gas flow.

Example six:

the optional design of this embodiment is: in the embodiment, two sets of outlet horns of the electric dust collector are arranged, 3 sets of dust collecting grids are arranged at the inlet of the outlet horns at intervals, and the appearance size of each set of dust collecting grids is equivalent to the appearance size of each set of dust collecting grids and is matched with the inner diameter of the mounting position closest to the outlet of the outlet horns.

Example seven:

the further design of this embodiment lies in: the curved grid in this example is a curved porous curved plate structure, as shown in fig. 11 to 13, the curved porous curved plate includes a plurality of curved single bodies 1, each curved single body 1 includes a first folding plate 3 and a second folding plate 4, the first folding plate 3 and the second folding plate 4 are identical in structure and both provided with two folding arms, and the bending angle range of the folding arms is 30 to 150 degrees (in this example, 145 degrees). The bent parts of the first folded plate and the second folded plate form tip ends, wherein the bent part of the first folded plate forms a first tip end, the bent part of the second folded plate forms a second tip end, and the first tip end and the second tip end can be used as discharge electrodes. The lower end parts of first folding arms of the first folding plate and the second folding plate are connected with the upper end part of the second folding arm, the first folding plate and the second folding plate are staggered up and down to form a near-parallelogram connecting surface, and a folding hole 2 is formed in the middle of the curved surface single body; the surfaces of the first folding plate 3 and the second folding plate 4 are smooth curved surface structures, so that the airflow resistance of the porous curved plate is reduced.

All the curved surface single bodies are connected in sequence from top to bottom and from left to right; in the two adjacent curved surface single bodies, the second folding plate of the upper curved surface single body is connected with the first folding plate of the lower curved surface single body through a bending part; in the two adjacent left and right curved surface single bodies, the first folding plates of the two curved surface single bodies are connected with each other, and the second folding plates are connected with each other; the curved surface single bodies are integrally connected to form a porous curved surface plate, and the porous curved surface plate has a homogenization effect on the airflow flowing through the baffling holes. The periphery of the porous curved plate is provided with an outer structural frame 5.

The porous curved plate is formed by cutting and stretching a 304 stainless steel plate or combining and connecting the stainless steel plate, and the specific manufacturing process is as follows:

the 304 steel plate is rolled into a hole by a rolling mill, and simultaneously, the hole is stretched towards two sides along the vertical direction of the 304 steel plate, and flat plates at two sides of the hole are stretched and deformed into a curved surface. The rolling mill is provided with turning tools at intervals, so that the next row of holes and the previous row of holes in rolled holes are staggered.

Example eight:

the further design of this embodiment lies in: at least one layer of porous curved plate is arranged in the gap 10 between adjacent electric fields.

Example nine:

the further design of this embodiment lies in: in the adjacent electric fields, the front electric field adopts a porous curved plate as an anode plate, and the porous curved plate is arranged between the adjacent cathode lines in the rear electric field.

Claims

1. A dry electrostatic precipitator with multi-zone coupling and high efficiency dust removal, the dry electrostatic precipitator comprises an inlet horn, a cover body and an outlet horn, a plurality of electric fields are arranged inside the cover body in sequence, and an anode plate is arranged in each electric field and cathode line, characterized in that: the inlet horn and the outlet horn are both provided with dust collection grids, the dust collection grids are evenly arranged by multiple groups of bent grilles, and the multiple groups of bent grilles are arranged along the smoke The air direction is set, and the upper and lower ends of each group of grilles are installed in the inlet horn and the outlet horn through the rapping frame.

2 . The dry electrostatic precipitator with multi-zone coupling and high efficiency dust removal according to claim 1 , wherein the bent grille adopts a V-shaped structure that is bent at least once. 3 .

3. The dry electrostatic precipitator for multi-zone coupling high-efficiency dust removal according to claim 2, characterized in that: the outlet horn adopts a structure with a V-shaped cross-section formed by bending once; The grid is bent twice to form a W-shaped or M-shaped structure.

4. The dry electrostatic precipitator with multi-zone coupling and high-efficiency dust removal according to claim 2, characterized in that: the dust collecting grid is divided into 8-12 rows of partitions by partitions, and each row of partitions is provided with 3 groups of bent The grille, each column partition is provided with a rapping frame and is equipped with a rapper respectively.

5 . The dry electrostatic precipitator with multi-zone coupling and high-efficiency dust removal according to claim 1 , wherein the inlet horn and the outlet horn are provided with a plurality of sets of the dust collecting grids at intervals. 6 .

6 . The dry electrostatic precipitator with multi-zone coupling high-efficiency dust removal according to claim 5 , wherein the interval ranges from 100 mm to 200 mm. 7 .

7. The dry electrostatic precipitator for multi-zone coupling high-efficiency dust removal according to claim 6, characterized in that: 3 groups of dust collection grids are arranged at intervals in the middle section of the inlet horn, and each group of dust collection grids is fitted with the imported horn; At the entrance of the outlet horn, three sets of dust collecting grids are arranged at intervals, and the external dimensions of each group of dust collecting grids are equivalent, and are adapted to the inner diameter of the installation position closest to the outlet of the outlet horn.

8. The dry electrostatic precipitator with multi-zone coupling and high efficiency dust removal according to any one of claims 1-7, wherein the bent grille adopts a bent porous curved panel structure, wherein the porous curved panel comprises Several curved monomers, the curved monomer includes a first folding board and a second folding board, the first folding board and the second folding board are each provided with two folding arms, and the lower end of the first folding arm is connected to the second folding board. The upper ends of the arms are connected, and the upper and lower staggered connection of the two forms a near-parallelogram connection surface, and a baffle hole is formed in the middle of the curved monomer; the upper and lower curved monomers are connected in sequence; , the second folded plate of the upper-curved unit is connected with the first folded panel of the lower-curved unit through a bend; in the two adjacent curved units on the left and right, the first folded panels of the two curved units are connected to each other, and the The two folded plates are connected to each other; a plurality of curved surface monomers are integrally connected to form a porous curved plate, which has a homogenization effect on the airflow flowing through the baffle holes.

9 . The dry electrostatic precipitator for multi-zone coupling high-efficiency dust removal according to claim 8 , wherein at least one layer of porous curved panels is further arranged in the gap between the adjacent electric fields. 10 .

10. The multi-zone coupling high-efficiency dry electrostatic precipitator according to claim 9, characterized in that: in adjacent electric fields, porous curved plates are used as anode plates in the front electric field, and between adjacent cathode lines in the rear electric field Set the porous surface panel.