CN110314477B - Ultra-clean electric-bag composite dust collector - Google Patents
Ultra-clean electric-bag composite dust collector Download PDFInfo
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- CN110314477B CN110314477B CN201910657112.7A CN201910657112A CN110314477B CN 110314477 B CN110314477 B CN 110314477B CN 201910657112 A CN201910657112 A CN 201910657112A CN 110314477 B CN110314477 B CN 110314477B
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Abstract
The invention discloses an ultra-clean electric-bag composite dust collector which comprises an electric field area and a bag dust removing area arranged behind the electric field area; the bag dust removal area comprises a plurality of parallel flue gas channels, and the wall parts of the flue gas channels are parallel to the height direction of the bag dust removal area; along flue gas flow direction, be equipped with at least one first metal filter element in the flue gas passageway, first metal filter element includes the axial region of perpendicular to flue gas flow direction and follows a plurality of metal filter screen pieces that the circumference of axial region distributes, the axial region can rotate to dispose into: the smoke flowing into the smoke channel flows out of the smoke channel after passing through the metal filter meshes, and at least part of the smoke flows through more than two metal filter meshes. This ultra-clean electricity bag composite dust remover improves the structure of metal filter screen for the flue gas can filter through at least two-layer metal filter screen, has improved dust collection efficiency.
Description
Technical Field
The invention relates to the technical field of flue gas dust removal and environmental protection, in particular to an ultra-clean electric-bag composite dust remover.
Background
The existing power plant dust removing equipment generally adopts an electric dust remover, a bag dust remover or an electric bag composite dust remover, wherein the electric dust remover and the electric bag composite dust remover are favored by users due to low maintenance cost, small running resistance and low cost.
One of the core components in the electric-bag composite dust collector is a filter bag, and the filter bag is used for filtering dust which is not trapped in an electric field area at the front stage.
The existing filter bag is generally of a circular structure, and is supported by a cloth-shaped fiber filter material, such as PPS, PTFE, P84 or PI, because the cloth-shaped fiber is soft and needs an internal support frame bag cage, the structure is complex.
Because the metal filter screen has certain rigidity and intensity, does not need to be provided with a bag cage in a matching way, and has the characteristic of high-precision filtration of the cloth-shaped fiber filter material, the metal filter screen is also used for replacing a dust remover of the cloth-shaped fiber filter material at present.
But the prior electric-bag composite dust collector adopting the metal filter screen mostly has the following problems:
the metal filter screen is usually made into a cylindrical structure, smoke is discharged only through one layer of metal filter screen, and the filtering efficiency is low.
In view of this, how to improve the structure of the prior electrostatic fabric filter to improve the dust removal efficiency is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an ultra-clean electric-bag composite dust remover, which improves the structure of a metal filter screen, so that smoke can be filtered by at least two layers of metal filter screens, the aim of removing dust by using airflow is fulfilled by rotating the metal filter screens, and the dust removing and dust removing efficiency is improved.
In order to solve the technical problems, the invention provides an ultra-clean electric-bag composite dust collector which comprises an electric field area and a bag dust removing area arranged behind the electric field area; the bag dust removal area comprises a plurality of parallel flue gas channels, and the wall parts of the flue gas channels are parallel to the height direction of the bag dust removal area; along flue gas flow direction, be equipped with at least one first metal filter element in the flue gas passageway, first metal filter element includes the axial region of perpendicular to flue gas flow direction and follows a plurality of metal filter screen pieces that the circumference of axial region distributes, the axial region can rotate to dispose into: the smoke flowing into the smoke channel flows out of the smoke channel after passing through the metal filter meshes, and at least part of the smoke flows through more than two metal filter meshes.
The ultra-clean electric-bag composite dust remover further comprises a driving component, wherein the driving component is used for driving the shaft part to rotate so as to change the surface part of the metal filter screen towards the inlet of the flue gas channel; the wall part of the flue gas channel is provided with an arc-shaped wall section, the circle center of the arc-shaped wall section is coincided with the center of the shaft part, and the metal screen piece can be in sealing contact with the arc-shaped wall section in the rotating process of the shaft part.
According to the ultra-clean electrostatic fabric filter, the shaft part is arranged in parallel to the height direction of the bag dust removal area, and four metal filter screens are uniformly distributed on the shaft part along the circumferential direction of the shaft part; the first wall portion has a first arc shaped wall section, the second wall portion has a second arc shaped wall section, the centers of the first and second arc shaped wall sections are the same, and the center of the shaft portion coincides with the center of the circle.
In the ultra-clean electrostatic fabric filter, the central angle of the first arc-shaped wall section and the central angle of the second arc-shaped wall section are both 90 degrees.
In the above ultra-clean electrostatic fabric composite precipitator, the first wall portion is provided with an elastic layer corresponding to the inner wall surface of the first arc-shaped wall section, and the second wall portion is also provided with an elastic layer corresponding to the inner wall surface of the second arc-shaped wall section.
According to the ultra-clean electrostatic fabric filter, the outer side edge of the metal filter screen is fixedly inserted into the U-shaped plate, and the metal filter screen is in sealing contact with the elastic layer through the U-shaped plate.
According to the ultra-clean electric bag composite dust remover, the reinforcing ribs are arranged at the fixed connection part of the inner side edge of the metal filter screen sheet and the shaft part;
or reinforcing ribs are arranged at the fixedly connected part of the inner side edge of the metal filter screen sheet and the shaft part and on the surface of the metal filter screen sheet.
In the ultra-clean electrostatic fabric composite precipitator, the flue gas channel is provided with more than two first metal filter elements, and along the flow direction of the flue gas, the pores of the metal filter mesh sheets of the first metal filter element positioned at the upstream are larger than the pores of the metal filter mesh sheets of the first metal filter element positioned at the downstream.
The ultra-clean electrostatic fabric composite dust collector is characterized in that at least one second metal filter component is further arranged in the flue gas channel, the second metal filter component comprises a metal filter screen layer, the metal filter screen layer is perpendicular to the flow direction of flue gas, and the periphery of the metal filter screen layer is abutted against the peripheral wall of the flue gas channel.
According to the ultra-clean electric-bag composite dust remover, the front end of each first metal filtering component is provided with a nozzle, the nozzles are arranged on the top wall of the smoke channel, and the nozzles are connected with a water spraying system of the ultra-clean electric-bag composite dust remover and used for spraying water to the metal filter screen sheets of the corresponding first metal filtering components.
In the ultra-clean electrostatic fabric filter, one or both surfaces of the metal filter screen sheet are provided with the adsorbent layer.
The ultra-clean electric-bag composite dust remover provided by the invention divides the bag dust removal area into a plurality of smoke channels, the metal filter screens of the first metal filter parts in each smoke channel are made into a sheet structure and are distributed around the circumference of one shaft part, so that the metal filter screens of the first metal filter parts can divide the smoke channels, smoke entering the smoke channels can only flow out of the smoke channels after passing through the metal filter screens, and at least part of smoke can flow through the two metal filter screens, therefore, the dust removal efficiency is high.
In a preferred embodiment of the present invention, the ultra-clean electrostatic-bag composite precipitator is further provided with a driving component for driving the shaft portion of the first metal filter component to rotate, the metal filter mesh rotates along with the metal filter mesh to change the surface portion of the metal filter mesh facing the inlet of the flue gas channel, and correspondingly, the wall portion of the flue gas channel is provided with an arc-shaped wall section which is matched with the metal filter mesh in rotation so as to ensure that the metal filter mesh can be in sealing contact with the arc-shaped wall section when rotating; therefore, when certain dust is accumulated on the surface, namely the dust facing surface, of the metal filter screen facing the inlet of the flue gas channel, the original dust facing surface of the metal filter screen faces the inlet of the flue gas channel through rotation, so that the dust facing surface is changed into the dust facing surface, and when the metal filter screen works again, the flue gas is discharged from the original dust facing surface through the metal filter screen, the dust accumulated on the original dust facing surface can be removed, and the effect of cleaning the dust is achieved; meanwhile, the rotation parameters of the shaft part can be controlled, and the dust cleaning operation of the metal filter screen piece is realized through centrifugal force.
Drawings
FIG. 1 is a front view of a first embodiment of an ultra-clean electrostatic-bag filter according to the present invention;
FIG. 2 is a top view of the ultra-clean electrostatic-bag filter of FIG. 1;
FIG. 3 is a front view of the bag dust removal area of the ultra-clean electrostatic-bag composite precipitator of FIG. 1;
FIG. 4 is a top view of a flue gas channel of the bag dust removal section of the ultra-clean electrostatic-bag precipitator of FIG. 1;
FIG. 5 is a schematic view of the configuration of the engagement of the metallic mesh sheet with the shaft portion and the arcuate wall section;
FIG. 6 is a plan view of a flue gas channel of a bag dust removing area of the ultra-clean electric-bag composite dust collector in the second embodiment;
FIG. 7 is a plan view of the ultra-clean electrostatic and fabric composite precipitator in the third embodiment.
Description of reference numerals:
an inlet horn 10;
an electric field area 20, a discharge electrode 21, an anode plate 22 and a power supply 23;
the bag dust removal region 30, the flue gas duct 31, the first wall portion 311, the first arc-shaped wall portion 3111, the second wall portion 312, the second arc-shaped wall portion 3121, the on-off valve 314, the cover plate 315, the first metal filter element 32, the shaft portion 321, the metal screen sheet 322, the first metal screen sheet 322a, the second metal screen sheet 322b, the third metal screen sheet 322c, the fourth metal screen sheet 322d, the U-shaped plate 323, the reinforcing rib 324, the driving element 325, and the metal screen layer 33;
a nozzle 40, an ash hopper 50, an outlet horn 60 and an air distribution plate 70.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, fig. 1 is a front view of a first embodiment of an ultra-clean electrostatic-bag filter according to the present invention; FIG. 2 is a top view of the ultra-clean electrostatic-bag filter of FIG. 1; fig. 3 is a front view of a bag dust removing area of the ultra-clean electric-bag composite dust collector shown in fig. 1.
The ultra-clean electric-bag composite dust collector comprises an inlet horn 10, an electric field area 20 connected with the inlet horn 10, a bag dust removal area 30 connected with the electric field area 20 and an outlet horn 60 connected with the bag dust removal area 30; wherein, the bottom of the electric field area 20 and the bag dust removal area 30 are both provided with an ash bucket 50, and an air flow distribution plate 70 is arranged between the electric field area 20 and the bag dust removal area 30.
The flue gas after the coal burning of the boiler enters the electric field area 20 at the front stage from the inlet horn 10 after the conventional pretreatment, then the flue gas is uniformly distributed and shunted through the air flow distribution plate 70, then enters the bag dust removal area 30, and finally is discharged from the outlet horn 60.
In this embodiment, the bag dust collecting area 30 of the ultra-clean electric-bag composite dust collector comprises a plurality of parallel flue gas channels 31, wherein the wall parts of the flue gas channels 31 are parallel to the height direction of the bag dust collecting area 30, so that the dust collecting hopper 50 is convenient to collect dust.
It is clear that the flue gas channels 31 are arranged in a direction perpendicular to the flow direction of the flue gas, as shown in fig. 2. The number of the flue gas channels 31 can be specifically set according to the actual situation of the ultra-clean electric-bag composite dust collector, and is not limited to five shown in fig. 2.
Along the flue gas flowing direction, at least one first metal filtering component 32 is arranged in each flue gas channel 31, wherein the first metal filtering component 32 comprises a shaft portion 321 perpendicular to the flue gas flowing direction and a plurality of metal filter screen sheets 322 distributed along the circumferential direction of the shaft portion 321, and is configured to: the flue gas flowing into the flue gas channel 31 passes through the metal filter screen pieces 322 and then flows out of the flue gas channel 31, and at least part of the flue gas flows through more than two metal filter screen pieces 322.
It can be understood that, in order to make the flue gas flowing into the flue gas channel 31 flow out of the flue gas channel 31 after passing through the metal filter mesh sheets 322, at least two metal filter mesh sheets 322 are respectively in contact with two opposite wall portions of the flue gas channel 31, and because the metal filter mesh sheets 322 are also connected with the shaft portion 321, the flue gas entering the flue gas channel 31 is discharged after being filtered by the metal filter mesh sheets 322. Meanwhile, at least part of the flue gas flows through more than two metal screen pieces 322, that is, at least one metal screen piece 322 is arranged between the two metal screen pieces 322 and faces the incoming flow direction of the flue gas.
This ultra-clean electricity bag composite dust remover, separate bag dust removal district 30 for a plurality of flue gas channel 31, the metal filter structure of first metal filter element 32 in every flue gas channel 31 makes the lamellar structure, and arrange around the circumference of a axial region 321, make the setting of the metal filter screen piece 322 of first metal filter element 32 can separate flue gas channel 31, so that the flue gas that gets into flue gas channel 31 can only flow out flue gas channel 31 behind metal filter screen piece 322, and at least partial flue gas can flow through two metal filter screen pieces 322, and the dust collection efficiency is high, in addition, the length or the height of the metal filter screen piece 322 of lamellar structure are unrestricted, can make the space of whole bag dust removal district 30 all obtain the utilization, ensure the dust collection efficiency.
In a further scheme, the ultra-clean electric-bag composite dust collector further comprises a driving component 325, wherein the driving component 325 is used for driving the shaft part 321 to rotate so as to change the surface of the metal filter screen piece 322 facing the inlet of the flue gas channel 31; the wall of the flue gas channel 31 has an arc-shaped wall section, the center of the circle of which coincides with the center of the shaft section 321, and during the rotation of the shaft section 321, the metal screen piece 322 can be in sealing contact with the arc-shaped wall section. It can be understood that the arrangement of the arc-shaped wall section of the flue gas channel 31 is matched with the rotation of the metal screen pieces 322 to ensure that neither the rotation of the metal screen pieces 322 nor the separation of the flue gas channel 31 by the metal screen pieces 322 is affected in the process of adjusting the position of the metal screen pieces 322.
When the driving member 325 drives the shaft 321 to rotate, the metal filter mesh piece 322 also rotates, so that the surface of the metal filter mesh piece 322 facing the inlet of the flue gas channel 31 can be changed. It will be appreciated that the metal screen sheet 322 has two faces, one face facing the inlet of the flue gas channel 31, i.e. in the direction of the incoming flue gas flow, hereinafter collectively referred to as the dust-facing side, and the other face facing the outlet of the flue gas channel 31, i.e. facing away from the incoming flue gas flow, hereinafter collectively referred to as the dust-facing side, for dust removal and filtration of the flue gas.
The driving member 325 may be a motor, and the shaft 321 may be a tubular structure. Of course, other forms may be adopted in practice according to the requirements.
After the arrangement, the operation is carried out for a period of time, after a certain amount of dust is accumulated on the dust-facing surface of the metal filter screen piece 322, the original dust-facing surface of the metal filter screen piece can be turned to the inlet of the flue gas channel 31 by rotating, so that the dust-facing surface is changed into the dust-facing surface, and when the operation is carried out again, the flue gas is discharged from the original dust-facing surface through the metal filter screen piece 322, the dust accumulated on the original dust-facing surface can be removed, and the effect of cleaning the dust is achieved; meanwhile, the rotation parameters of the shaft 321 can be controlled, and the dust cleaning operation of the metal screen piece 322 can be realized by centrifugal force.
In a specific scheme, the shaft portion 321 of the first metal filter element 32 is arranged in parallel to the height direction of the bag dust removal area 30, so that the arrangement is convenient and the structure is simple.
Referring to fig. 4, fig. 4 is a top view of a flue gas channel of a bag dust removing area of the ultra-clean electrostatic-bag composite precipitator shown in fig. 1.
In a specific embodiment, the first metal filter element 32 includes four metal filter mesh sheets 322, the four metal filter mesh sheets 322 are uniformly distributed along the circumference of the shaft portion 321, and the flue gas channel 31 includes a first wall portion 311 and a second wall portion 312 which are oppositely disposed, wherein the first wall portion 311 has a first arc-shaped wall section 3111, the second wall portion 312 has a second arc-shaped wall section 3121, and the first arc-shaped wall section 3111 and the second arc-shaped wall section 3121 have the same center and coincide with the center of the shaft portion 321.
Thus, the shaft portion 321 can be rotated 360 degrees, and no matter which wire mesh piece 322 is rotated to the first wall portion 311 or the second wall portion 312, the corresponding arc-shaped wall section is engaged therewith, without causing interference.
More specifically, the central angle of the first arc-shaped wall section 3111 and the central angle of the second arc-shaped wall section 3121 are both 90 degrees, as shown in fig. 4, so that the largest flow area of the flue gas passage 31 can be ensured on the basis that the flue gas passage 31 is divided by the metal screen, and the structure is simple and compact.
Specifically, taking the example shown in fig. 4 as an example, for convenience of description, the four metal screen sheets 322 of the first metal filter element 32 are referred to as a first metal screen sheet 322a, a second metal screen sheet 322b, a third metal screen sheet 322c, and a fourth metal screen sheet 322d, respectively.
In operation, the four metal screen sheets 322 of the first metal filter element 32 are preferably positioned such that: the first and second wire mesh sheets 322a and 322b are in contact with the front end (the end near the entrance of the flue gas channel 31) and the rear end (the end away from the entrance of the flue gas channel 31) of the first curved wall section 3111, respectively, and the third and fourth wire mesh sheets 322c and 322d are in contact with the front end and the rear end of the second curved wall section 3121, respectively.
After the arrangement, after the flue gas enters the flue gas channel 31, part of the flue gas flows through the first metal filter screen piece 322a and then flows through the second metal filter screen piece 322b, and the rest of the flue gas flows through the third metal filter screen piece 322c and then flows through the fourth metal filter screen piece 322d, so that the flue gas passing through the first metal filter element 32 sequentially passes through the two metal filter screen pieces, namely, the two layers of filtering, and the dust removal effect is good.
In particular, after the first metal filter element 32 is operated for a period of time in the position shown in fig. 4, the shaft portion 321 can be driven to rotate clockwise by 90 degrees, and at this time, the four metal filter mesh sheets 322 are still in the position of contacting with the four ends of the two arc-shaped wall sections, respectively, that is, the smoke passes through the first metal filter element 32 and is still filtered by two layers.
It can be understood that, after the shaft 321 drives the four metal screen sheets 322 to rotate clockwise by 90 degrees, the position of the second metal screen sheet 322b is changed from the position shown in fig. 4 to the position in contact with the rear end of the second arc-shaped wall section 3121, the dust-facing surface of the second metal screen sheet 322b is changed to be the dust-back surface, and the dust-back surface is changed to be the dust-facing surface; accordingly, the position of the third wire screen piece 322c is changed from the position shown in fig. 4 to the position in contact with the front end of the first arc-shaped wall section 3111, and the dust-facing surface of the third wire screen piece 322c is also changed to the dust-back surface.
Thus, after working for a period of time, the first metal filter element 32 is rotated to the next working position, and the dust of the flue gas can be removed, and simultaneously, the dust of each metal filter screen piece 322 can be removed.
It should be noted that, in practical application, the positions of the four metal screen sheets 322 of the first metal filter element 32 can be configured in other manners, for example, the first metal screen sheet 322a is in contact with the front section of the first arc-shaped wall section 3111, and correspondingly, the fourth metal screen sheet 322d is in contact with the rear section of the second arc-shaped wall section 3121, obviously, the second metal screen sheet 322b and the third metal screen sheet 322c are not in contact with the first wall portion 311 and the second wall portion 312, so that the first metal screen sheet 322a and the fourth metal screen sheet 322d separate the flue gas passage 31 to ensure that the flue gas can be filtered by the metal screen sheets 322, but since there is a gap between the second metal screen sheet 322b and the third metal screen sheet 322c and the wall portion of the flue gas passage at this time, a part of the flue gas flows toward the outlet direction through the gap, that is, when the smoke passes through the first metal filtering component 32, part of the smoke is filtered by only one layer. Therefore, it is preferable for the specific application that the four metal filter mesh sheets 322 of the first metal filter element 32 are set to the state shown in fig. 4.
It should be noted that, in practical applications, the number of the metal filter mesh sheets 322 in the first metal filter element 32 and the arrangement form of each metal filter mesh sheet 322 along the circumferential direction of the shaft portion 321 may be other, and the wall portion of the flue gas channel 31 may be correspondingly disposed, as long as the interface meeting the aforementioned requirements is provided. However, in a preferred embodiment, the first metal filter element 32 has a symmetrical structure, so that the flow resistance of the flue gas passing through the first metal filter element 32 is substantially the same, and the difference in flow rate of the flue gas passing through each metal filter mesh sheet 322 of the first metal filter element 32 due to the difference in resistance is avoided.
Referring also to fig. 5, fig. 5 is a schematic view of the engagement of the metal mesh sheet with the shaft and the arc wall section.
Because the metal filter screen piece 322 is relatively thin, in order to ensure the reliability of connection with the shaft part 321, a reinforcing rib 324 may be specifically provided at the connection position of the inner side edge thereof and the shaft part 321, the reinforcing rib 324 is specifically an angle steel with an L-shaped cross section, one edge of the angle steel may be connected with the peripheral wall of the shaft part 321 by fasteners such as bolts, and the other edge of the angle steel may also be connected with the metal filter screen piece 322 by fasteners such as bolts.
In addition, the surface of the metal mesh sheet 322 may be provided with ribs depending on the size, thickness, and the like of the metal mesh sheet 322.
Specifically, the metal screen 322 may be a stainless steel screen with a thickness ranging from 0.5mm to 5 mm.
In a specific scheme, more than two first metal filtering components 32 are arranged in each flue gas channel 31 along the flow direction of flue gas, so that after the flue gas enters the flue gas channels 31, the flue gas is filtered by at least two layers, and the dust removal effect is better.
In a specific scheme, the inner wall surface of the arc-shaped wall section of the flue gas channel 31 is provided with an elastic layer, so that the metal screen piece 322 can be ensured to be in sealing contact with the arc-shaped wall section through the design of the elastic layer, and the friction between the metal screen piece 322 and the arc-shaped wall section in the rotating process can also be relieved.
Specifically, the outer side edge of the metal screen sheet 322 is fixedly inserted into the U-shaped plate 323, and is sealed by the U-shaped plate 323 contacting the elastic layer.
The design of U-shaped plate 323 may also serve to reinforce metal screen sheet 322.
In the solutions shown in fig. 2 to 4, two first metal filtering components 32 are specifically arranged in each flue gas channel 31, and the structures of the two first metal filtering components 32 are the same, and when the device works, the relative positions of the two first metal filtering components 32 and the flue gas channel 31 are both shown in fig. 4, so that flue gas enters the flue gas channel 31, is filtered by four layers and then is discharged, and the dust removal efficiency is high.
It is understood that the configuration of each first metal filter element 32 may be configured differently for practical applications.
It should be noted that, although the more metal filter layers that the flue gas passes through, the better the dust removal effect is, the more filter layers are arranged, the larger the dust removal resistance is, so the dust removal resistance can be specifically arranged according to actual conditions.
On the basis of arranging more than two first metal filter elements 32 in the flue gas channel 31, the pores of the metal filter mesh sheets 322 of the first metal filter elements 32 positioned at the upstream are larger than the pores of the metal filter mesh sheets 322 of the first metal filter elements 32 positioned at the downstream along the flow direction of the flue gas. For example, the mesh diameter of the metal filter mesh sheet 322 of the upstream first metal filter element 32 may be set to about 10 micrometers to ensure a good dust removal effect on dust above PM10, and the mesh diameter of the metal filter mesh sheet 322 of the downstream first metal filter element 32 may be set to about 1 micrometer to ensure a good dust removal effect on dust below PM 10.
Therefore, the effect of grading dust removal can be achieved, dust removal resistance can be reduced, and the dust removal effect is further improved.
In a specific embodiment, an adsorbent layer, such as an activated carbon adsorbent layer, may be further disposed on one or both sides of each metal filter mesh sheet 322 to remove mercury in the flue gas.
As shown in fig. 2 to 4, in a specific embodiment, each of the inlet and outlet ends of the flue gas channel 31 is provided with a switch valve 314.
When the ultra-clean electrostatic fabric filter works normally, the switch valves 314 at the inlet end and the outlet end of the flue gas channel 31 are both in an open state, and when the device in the flue gas channel 31 needs to be overhauled or replaced, the switch valves 314 at the inlet end and the outlet end of the flue gas channel 31 can be closed.
In the specific scheme, the top wall of the flue gas channel 31 is provided with an access hole corresponding to the position of the first metal filtering component 32, the access hole is provided with a cover plate 315, and the cover plate 315 is used for sealing and sealing the access hole.
Thus, when the metal filter mesh sheet 322 needs to be repaired or replaced, the cover plate 315 may be opened and the first metal filter element 32 may be lifted by a crane.
In a specific scheme, a nozzle 40 is further arranged at the front end of each first metal filter element 32, each nozzle 40 is connected with a water spraying system of the ultra-clean electric bag composite dust collector and is used for spraying water to the metal filter screen pieces 322 corresponding to the first metal filter elements 32 so as to clean the metal filter screen pieces 322, and specifically, when the metal filter screen pieces 322 are cleaned by the water spraying systems, the rotation speed of the shaft portion 321 can be controlled by the driving component 325, and the water spraying amount of the nozzle 40 is controlled at the same time, so that the ash removal of each metal filter screen piece 322 is realized.
In this embodiment, the front stage electric field area 20 includes the discharge electrode 21 and the anode plate 22, the electric field area 20 is divided into a plurality of electric fields, and two adjacent electric fields are positive and negative electric fields, so that the dust entering the electric field area 20 is charged with positive and negative charges respectively, and the dust with positive and negative charges can be mixed together after leaving the electric field area 20, and due to the principle of opposite attraction, can be mutually coagulated and form large-particle dust, and is more easily filtered and dedusted by the bag dedusting area 30.
In other embodiments, such as the scheme shown in fig. 7, each electric field of the front stage electric field region 20 can also form a negative electric field, so that the structure of the electric field region 20 is relatively simple. Of course, in actual installation, each electric field of the electric field region 20 may also be set to be a positive electric field, and may be specifically set according to actual requirements.
In other embodiments, the flue gas channel 31 is provided with at least one second metal filter element on the basis of the first metal filter element 32, the second metal filter element comprises a metal screen layer 33, the metal screen layer 33 is arranged perpendicular to the flow direction of the flue gas, and the periphery of the metal screen layer 33 is abutted against the peripheral wall of the flue gas channel 31, so that the flue gas can completely pass through the metal screen layer 33. As shown in fig. 6, fig. 6 is a top view of a flue gas channel of a bag dust removing area of an ultra-clean electrostatic bag composite dust collector in the second embodiment, in the illustrated scheme, a first metal filter element 32 and a metal filter screen layer 33 are arranged in the flue gas channel 31, and it can be understood that, in actual arrangement, the number of the first metal filter element 32 and the metal filter screen layer 33 can be arranged according to needs, and the front-back position relationship between the first metal filter element 32 and the metal filter screen layer 33 can also be arranged according to actual needs, and is not limited to that shown in the figure.
The ultra-clean electric-bag composite dust remover provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The ultra-clean electric-bag composite dust collector comprises an electric field area and a bag dust removing area arranged behind the electric field area; the bag dust removal device is characterized in that the bag dust removal area comprises a plurality of parallel flue gas channels, the wall parts of the flue gas channels are parallel to the height direction of the bag dust removal area, and the flue gas channels are arranged along the direction vertical to the flow direction of flue gas; along flue gas flow direction, be equipped with at least one first metal filter element in the flue gas passageway, first metal filter element includes the axial region of perpendicular to flue gas flow direction and follows a plurality of metal filter screen pieces that the circumference of axial region distributes, the axial region can rotate to dispose into: the flue gas flowing into the flue gas channel flows out of the flue gas channel after passing through the metal filter screen sheets, and at least part of the flue gas flows through more than two metal filter screen sheets; the driving part is used for driving the shaft part to rotate so as to change the surface of the metal filter screen towards the inlet of the smoke channel;
the smoke passage is internally provided with more than two first metal filtering parts, and the pores of the metal filter screen sheets of the first metal filtering parts positioned at the upstream are larger than the pores of the metal filter screen sheets of the first metal filtering parts positioned at the downstream along the smoke flowing direction.
2. The ultra-clean electrostatic fabric composite precipitator of claim 1 wherein the wall of the flue gas duct has an arc-shaped wall section, the center of the arc-shaped wall section coincides with the center of the shaft section, and the metal screen sheet is capable of sealing contact with the arc-shaped wall section during rotation of the shaft section.
3. The ultra-clean electric-bag composite dust collector as claimed in claim 2, wherein the shaft portion is arranged in parallel with the height direction of the bag dust collecting area, and four metal filter screen sheets are uniformly distributed on the shaft portion along the circumference; the flue gas passageway includes relative first wall portion and second wall portion that sets up, first wall portion has first arc wall section, the second wall portion has second arc wall section, the centre of a circle of first arc wall section and second arc wall section is the same, just the center of axial part with the centre of a circle coincide.
4. The ultra-clean electrostatic fabric composite precipitator of claim 3 wherein the first and second arcuate wall sections each have a central angle of 90 degrees.
5. The electrostatic fabric composite precipitator of claim 3, wherein the first wall portion is provided with an elastic layer corresponding to the inner wall surface of the first arc-shaped wall portion, and the second wall portion is also provided with an elastic layer corresponding to the inner wall surface of the second arc-shaped wall portion.
6. The ultra-clean electric-bag composite dust collector as claimed in claim 5, wherein the outer side edge of the metal filter screen sheet is fixedly inserted into a U-shaped plate, and the metal filter screen sheet is in sealing contact with the elastic layer through the U-shaped plate.
7. The ultra-clean electric-bag composite dust collector as claimed in claim 1, wherein a reinforcing rib is arranged at the fixed connection part of the inner side edge of the metal filter screen sheet and the shaft part;
or reinforcing ribs are arranged at the fixedly connected part of the inner side edge of the metal filter screen sheet and the shaft part and on the surface of the metal filter screen sheet.
8. The ultra-clean electric-bag composite dust collector as claimed in any one of claims 1 to 7, wherein at least one second metal filter element is further arranged in the flue gas channel, the second metal filter element comprises a metal filter screen layer, the metal filter screen layer is arranged perpendicular to the flow direction of the flue gas, and the periphery of the metal filter screen layer is abutted with the peripheral wall of the flue gas channel.
9. The ultra-clean electric-bag composite dust collector as claimed in any one of claims 1 to 7, wherein a nozzle is provided at the front end of each first metal filter element and is provided at the top wall of the flue gas channel, and the nozzle is connected with the water spraying system of the ultra-clean electric-bag composite dust collector and is used for spraying water to the metal filter screen sheet of the corresponding first metal filter element.
10. The ultra-clean electrostatic fabric filter according to any of claims 1 to 7, wherein an adsorbent layer is provided on one or both surfaces of the metal mesh sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657112.7A CN110314477B (en) | 2019-07-19 | 2019-07-19 | Ultra-clean electric-bag composite dust collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657112.7A CN110314477B (en) | 2019-07-19 | 2019-07-19 | Ultra-clean electric-bag composite dust collector |
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| CN110314477A CN110314477A (en) | 2019-10-11 |
| CN110314477B true CN110314477B (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910657112.7A Active CN110314477B (en) | 2019-07-19 | 2019-07-19 | Ultra-clean electric-bag composite dust collector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112774360A (en) * | 2021-02-25 | 2021-05-11 | 福建龙净环保股份有限公司 | Metal filter bag, dust cleaning method of metal filter bag and dust collector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203971670U (en) * | 2014-07-21 | 2014-12-03 | 新疆石油勘察设计研究院（有限公司） | Without card end face seal compound dust-collection device |
| KR20160088703A (en) * | 2015-01-16 | 2016-07-26 | 주식회사 이피아이티 | Composite dust collector |
| CN208097684U (en) * | 2018-03-06 | 2018-11-16 | 天津市卓翼科技有限公司 | A kind of plug-type electrostatic fabric filter |
| CN208406488U (en) * | 2018-06-01 | 2019-01-22 | 江苏君子兰环保科技有限公司 | A kind of rotation filter type air purification device |
| CN208943609U (en) * | 2018-10-29 | 2019-06-07 | 河南利欣制药股份有限公司 | A kind of injection production filter device |
-
2019
- 2019-07-19 CN CN201910657112.7A patent/CN110314477B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203971670U (en) * | 2014-07-21 | 2014-12-03 | 新疆石油勘察设计研究院（有限公司） | Without card end face seal compound dust-collection device |
| KR20160088703A (en) * | 2015-01-16 | 2016-07-26 | 주식회사 이피아이티 | Composite dust collector |
| CN208097684U (en) * | 2018-03-06 | 2018-11-16 | 天津市卓翼科技有限公司 | A kind of plug-type electrostatic fabric filter |
| CN208406488U (en) * | 2018-06-01 | 2019-01-22 | 江苏君子兰环保科技有限公司 | A kind of rotation filter type air purification device |
| CN208943609U (en) * | 2018-10-29 | 2019-06-07 | 河南利欣制药股份有限公司 | A kind of injection production filter device |
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| CN110314477A (en) | 2019-10-11 |
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