WO2008056907A1

WO2008056907A1 - Particle separtion and collection system with multi-layer and multi-stage porous plate.

Info

Publication number: WO2008056907A1
Application number: PCT/KR2007/005429
Authority: WO
Inventors: Sug Jun Yoa
Original assignee: Sug Jun Yoa
Priority date: 2006-11-07
Filing date: 2007-10-31
Publication date: 2008-05-15
Also published as: KR100770434B1

Abstract

The present invention relates to a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein, each plate 1 having a plurality of fine holes Ia adapted to collect the dust particles in the air by using the inertia force of the particles and the vortex diffusion according to the recirculation flow of turbulence and having a multi- layered dust collection inner space portion Ie formed therein so as to prevent the re-entrainment of the dust on the plate.

Description

PARTICLE SEPARTION AND COLLECTION SYSTEM WITH MULTI-LAYER AND MULTI-STAGE POROUS PLATE

Technical Field

[1] The present invention relates to a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein, and more particularly, to a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein wherein a plurality of multi-layer (for example, dual-layer or three-layer) plates are arranged to form a plurality of dust collection inner space portions therein, so that the dust entering the dust collection inner space portions is moved downwardly and accumulated therein by gravity, thereby finishing dust collection.

[2] Also, the present invention relates to a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein that conducts the particle separation and collection by the impaction of the dust particles, so as to solve the problem that filter pores are blocked by high pressure loss (caused by the dust accumulation on a filter) and dew condensation generated in a bag filter device as commonly used in recent days, thereby achieving high efficiencies in the particle separation and collection and providing the size reduction of the system, without having a filter as generally used in existing dust collection devices, so that the present invention can reduce the economical expenses consumed in the air pollution- preventing facilities and the particle size collection systems and can improve the technical competition in this fields. Background Art

[3] As air pollution is seriously bad, recently, the observance of the regulations on the discharging of air pollution materials is strictly needed. Therefore, there is a need for development of a low expense and high efficiency particle collection device so as to exchange or replace the air pollution-preventing facilities built in a variety of industrial fields, and thus, the studies and development have been dynamically made all over the world.

[4] The high efficiency dust collection device as commonly used includes two kinds of devices, that is, a bag filter device and an electrostatic precipitator, each of them having both of advantages and disadvantages as mentioned below, so that many studies should be made to remove their disadvantages.

[5] The electrostatic precipitator has some advantages in that the exhaustion is conducted at a high flow rate, without having any remarkable pressure loss and the structure is very simple to achieve the maintenance with ease, but it has some disadvantages in that as the dust collection mechanism is dependent upon the electric force alone, the device should be large in size to maintain the high efficiency.

[6] On the other hand, the bag filter most widely used in the industrial fields has some advantages of providing a high efficiency of dust collection and a wide range of application, but it has some disadvantages of causing a high pressure loss and difficulties in the maintenance according to the use of filter media.

[7] To solve these problems as mentioned above, there is provided a multi-stage porous plate dust collection system as disclosed in Korean Patent No.403287 issued to the same applicant as in this invention, but the prior art also has a problem that it is difficult to maintain the high efficiency of dust collection of the system for long hours, as the re-entrainment of the dust collected on the plate occurs. Therefore, the prior art single-layer and multi-stage porous plate results in a low efficiency of dust collection by the generation of the re-entrainment of the dust and separately needs cleaning equipment for removing the dust after the re-entrainment of the dust on the plate happened.

Disclosure of Invention Technical Problem

[8] Accordingly, the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein that is provided with a plurality of multilayer dust collection space portions, so as to prevent the re-entrainment of dust on the plates from occurring and effectively maintain a high efficiency of dust collection.

[9] That is, the object of the present invention is to provide a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein that can separate and collect the dust by particle sizes through the optimal design and combination of the plurality of multi-layer and multi-stage porous plates, while having a high efficiency of 99% or more and managing small, medium and large-sized air flow, without having a filter mounted therein.

[10] The performance of the multi-layer and multi-stage porous plates largely depends upon principal variables like a hole-passing air flow rate, a hole diameter, a tube diameter, and the distance between the adjacent multi-layer plates and the arrangement of the plates (two- stage or more).

[11] According to the present invention, the dust is separated and collected to the dust collection inner space portions of the multi-layer and multi-stage porous plates, so that a high efficiency of 99% or more of the dust collection can be stably maintained and no separate dust removing system is needed.

[12] Therefore, the present invention provides a particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein that can solve the problems the conventional dust collection devices have had that filtering velocity is low (that is, the large- sized device) and it is difficulty to conduct the maintenance of the filter and to conduct the continuous operation by the interruption of the cleaning process, thereby improving the dust collection efficiency, causing substantially low pressure loss, increasing the air flow to be managed, and enhancing the maintenance capability. Technical Solution

[13] To achieve the above object, according to the present invention, there is provided particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein, each plate having a plurality of fine holes adapted to collect the dust particles in the air by using the inertia force of the particles and the vortex diffusion according to the recirculation flow of turbulence and having a multi- layered dust collection inner space portion formed therein so as to prevent the re- entrainment of the dust on the plate, wherein each of the multi-layered dust collection inner space portions is formed in such a manner that the plate is connected to the adjacent plate by means of a tube adapted to accelerate the air stream containing dust to a high flow rate so as to apply a strong inertia force to the dust, each of the multi- layered dust collection inner space portions having a hole formed at the front stage thereof; wherein the hole is formed at the front stages of the multi-layered plates so as to allow the dust in the air streams to enter the multi-layered dust collection inner space portions; and wherein the tubes on the multi-layered plates are arranged to cross the tubes on the adjacent multi-layered plates. Brief Description of the Drawings

[14] FIG.1 is a sectional view showing a plurality of multi-layer and multi-stage porous plates employed in a particle separation and collection system according to the present invention.

[15] FIG.2 is an enlarged sectional view showing the air stream flow and particle trajectory of the multi-layer and multi-stage porous plate employed in the particle separation and collection system according to the present invention.

[16] FIG.3 is a schematic sectional view showing the configuration where the multi-layer and multi-stage porous plates are coupled with the particle separation and collection system according to the present invention.

[17] FIG.4 is a schematic sectional view showing a case where electric forces are applied to the multi-layer and multi-stage porous plates employed in this invention. [18] FIG.5 is a schematic sectional view showing a case where a droplet ejection system is assembled to the multi-layer and multi-stage porous plates employed in this invention.

[19] FIG.6 is a horizontal sectional view showing a case where a dust removing system is provided to the multi-layer and multi-stage porous plates employed in this invention.

[20] FIG.7 is a schematic sectional view showing a case where a filter system is coupled to the multi-layer and multi-stage porous plates employed in this invention.

[21] FIG.8 is an enlarged sectional view showing the front surface of the multi-layer dust collection space portion of the multi-layer and multi-stage porous plate employed in this invention. Mode for the Invention

[22] FIG.1 is a sectional view showing a plurality of multi-layer and multi-stage porous plates employed in a particle separation and collection system according to the present invention, FIG.2 is an enlarged sectional view showing the air flow stream and particle trajectory of the multi-layer and multi-stage porous plates employed in the particle separation and collection system according to the present invention, and FIG.3 is a schematic sectional view showing the configuration where the multi-layer and multistage porous plates are coupled with the particle separation and collection system according to the present invention. Now, an explanation on the particle separation and collection system will be given with reference to the attached drawings.

[23] The present invention provides a particle separation and collection system 2 with a plurality of multi-layer and multi-stage porous plates 1 mounted therein, thereby forming a plurality of multi-layer dust collection space portions Ie, so as to prevent the reduction of the dust collection efficiency caused by the re-entrainment of dust collected on the (single-layer) multi-stage porous plates 1 occurring in the prior art (Korean Patent No.403287 as mentioned above).

[24] The porous plate 1 is formed multi-layered and thus, the two porous plates 1 are connected to each other by means of a tube Ib, thereby forming a dust collection inner space portion Ie. The present invention provides an effective re-en- trainment-preventing structure wherein the dust in the air stream flows through a dust separation hole Ia formed on the plate 1 at the front stage of the plate 1 forming the dust collection space portion by a substantially strong inertia force, and the dust entering the dust collection inner space portions Ie is never discharged.

[25] That is, the present invention forms the multi-layer and multi-stage porous plate dust collection system wherein the dust particles in the air stream flowing into a duct 11 through an entrance 10 are separated and collected into the plurality of dust collection inner space portions Ie formed between the adjacent multi-layer plates 1, and the tube Ib is formed integrally with the plate 1 in such a manner as to be passed through the rear side plate 1 so as to accelerate the air stream containing the dust to a high flow rate and to apply a strong inertia force to the dust. Further, a plurality of holes Ia are formed on the front stages of the multi-layer plates 1 so as to make the dust in the air stream enter the dust collection inner space portions Ie, and as the plates 1 are multi- layered, the dust collection inner space portions Ie are formed so as to prevent the re- entrainment of dust from occurring. The inner space portions Ie between the adjacent plates 1 are supported by the tubes Ib, and the multi-layer plates 1 form the plurality of tubes Ib in such a manner as to cross the tubes Ib on the adjacent multi-layer plates 1, which causes the inertia force of the dust to be effectively improved.

[26] The gaps Ig between the adjacent plates 1, the diameter of the hole Ia, the gap between the adjacent holes Ia, the number of the holes Ia, the diameter of the tube Ib, the length of the tube Ib, and the height of the tube protruded from the rear side of the plate 1 can be appropriately varied in accordance with the air flow and dust to be managed, so as to obtain optimal designing effects.

[27] The tube Ib connecting the holes Ia formed at the front and rear ends of the multilayer plates 1 may have a protrusion portion Id formed at the front and rear ends thereof, and the protrusion portion Id formed at the rear end of the tube Ib serves to eject jet air streams to the next stage.

[28] The connection tube Ib has a sectional area of a round or square shape. A hole Ii adapted to make the dust enter the dust collection inner space portion Ie has a round or square shape and selectively has a protrusion portion around the hole Ii. The hole Ii formed on the front surface of the multi-layered plate 1 has a protrusion portion Ij formed around the front and rear ends thereof and has a filter Ik having a predetermined mesh size mounted at the inside thereof.

[29] The dust entering the dust collection inner space portions Ie is moved downwardly and accumulated in a dust accumulation container 3 disposed at the lower portion of the duct 11.

[30] The dust accumulation container 3 has a double-arranged damper 4 disposed at the upper portion thereof, so as to prevent the air stream from flowing thereinto.

[31] A charge system capable of applying an electric force to the multi-layer and multistage porous plates 1 is provided so as to improve the dust collection efficiency of the plates 1. That is, as shown in FIG.4, a preliminary charge part 5 is disposed in the duct 11, and an internal charge part 6 is disposed on the upper portion of the multi-layer and multi-stage plates 1.

[32] Further, so as to improve the collection efficiency of fine particles, as shown in

FIG.5, a droplet ejection system 7 is selectively disposed on the upper portion of a main dust collection part 12 where the multi-layer and multi-stage porous plates 1 are mounted and on the rear side of the duct 11.

[33] In case where the droplet ejection system 7 and the electric force are disposed and applied, a dust removing system 8 as shown in FIG.6 is separately mounted so as to remove the dust accumulated on the front surfaces of the dust-collected portion. The dust removing system 8 is described in detail in the prior art Korean Patent No.403287, and an explanation thereof will be avoided for the brevity of the description.

[34] To improve the dust collection efficiency of the multi-layer and multi-stage porous plate system, a separate filter system 9 may be coupled at the rear end of the system, as shown in FIG.5.

[35] The multi-layer and multi-stage porous plate system as configured above according to the present invention can overcome the problem the existing single-layer porous plate system has had that a real efficiency of dust collection is reduced by the re- flowing of particles toward the air stream caused by the re-entrainment of the dust particles upon collision of particles against the plate surfaces.

[36] The multi-layer and multi-stage porous plates 1 according to the present invention are provided with the holes Ia that are formed on the regions where dust collides and attaches in the existing single-layer and multi-stage porous plate, so as to conduct the dust separation therein, and also, the single-layer plate 1 is formed multi-layered (dual-layered, three-layered, and so on), so that the dust is moved and collected into the multi-layered dust collection inner space portions Ie, not on the surface of the plate 1. Therefore, the dust exists in the space portions separated from the main air streams and the collected dust is not further under the strong flow rate of the main air streams, thereby effectively preventing the re-entrainment of dust from occurring.

[37] Also, the collected dust is in the internal areas of the multi-layered plates 1, so that no separate cleaning equipment is needed and gathering the collected dust is very easy.

[38] To enhance the dust separation and collection effects in the multi-layer and multistage porous plates 1 according to the present invention, the diameter of the tube Ib, the height of the tube Ib, the gap Ic between the adjacent tubes Ib, the direction of the protrusion portion Id of the tube Ib, the diameter of the hole Ia, a distance If between the adjacent holes Ii, and a distance Ig between the adjacent plates 1, and a depth Ih of a layer are main variables in the system of the present invention, and it is possible to improve the dust collection efficiency and to adjust the particle size range of dust by the combination of the variables.

[39] Therefore, the dust separation and collection system according to the present invention can be used as the dust collection device and as a particle classification device for separating a specific range of particle size.

[40] The principal parts of the present invention are shown in FIG.l, and the air stream flows around the hole Ia and the trajectory of the particles are shown in FIG.2. [41] According to the present invention, as shown in FIG.1, the multi-layer porous plates

1 are multi-staged and the holes Ia between the adjacent multi-layer and multi-staged plates are formed cross each other, so that when the air streams containing the dust particles are passed through the tubes Ib of the multi-layer and multi-stage porous plates 1, the dust particles are accelerated to a substantially rapid flow rate and are passed through the holes Ia at the next stage by the strong inertia force thereof. Next, the dust particles are separated and collected into the dust collection inner space portions Ie, and the air streams are passed through the tubes Ib disposed at the side surfaces of the plate and then moved to the next stage.

[42] The dust particles that have been not collected in the first-staged multi-layer porous plates 1 are collected through the plurality of next-stage multi-layer porous plates 1, and the collected dust is moved by the gravity at a state of being separated from the air streams in the inner space portions Ie and is then accumulated in the dust accumulation container 3 as shown in FIG.3, thereby fundamentally removing the re-entrainment of the dust particles and continuously maintaining the dust collection state at a high efficiency. Industrial Applicability

[43] As described above, there is provided a dust separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein that achieves a high efficiency (99%) of dust collection, the reduction of the system size, and the easiness of the maintenance, so that the system of the present invention can be applied to a dust collection device and a particle size classification system. Further, upon installation of the dust collection system, the installation area and expenses can be reduced, the dust collection efficiency can be increased (to about 99% or more), the air flow to be managed in the system can be increased (the reduction of the system size, that is, the reduction by 1/10 or less of existing bag filter device sizes), the continuous operation for long hours can be possible, and lots of assistances can be given to the development of a high performance particle classification device.

[44]

[45]

Claims

[1] A particle separation and collection system with a plurality of multi-layer and multi-stage porous plates mounted therein, each plate (1) having a plurality of fine holes (Ia) adapted to collect the dust particles in the air by using the inertia force of the particles and the vortex diffusion according to the recirculation flow of turbulence and having a multi-layered dust collection inner space portion (Ie) formed therein so as to prevent the re-entrainment of the dust on the plate, wherein each of the multi-layered dust collection inner space portions (Ie) is formed in such a manner that the plate (1) is connected to the adjacent plate by means of a tube (Ib) adapted to accelerate the air stream containing dust to a high flow rate so as to apply a strong inertia force to the dust, each of the multi- layered dust collection inner space portions (Ie) having a hole (Ii) formed at the front stage thereof; wherein the hole (Ia) is formed at the front stages of the multi-layered plates (1) so as to allow the dust in the air streams to enter the multi-layered dust collection inner space portions; and wherein the tubes (Ib) on the multi-layered plates (1) are arranged to cross the tubes (Ib) on the adjacent multi-layered plates (1).

[2] The particle separation and collection system according to claim 1, wherein the tube (Ib) has a protrusion portion (Id) formed at the front and rear ends thereof, and the hole (Ii) formed on the front surface of the multi-layer plate (1) has a protrusion portion (Ij) formed around the front and rear ends thereof and a filter (Ik) mounted at the inside thereof.

[3] The particle separation and collection system according to claim 1, wherein the dust entering the dust collection inner space portions (Ie) is moved downwardly and accumulated in a dust accumulation container (3) having a double damper system (4) disposed therein.

[4] The particle separation and collection system according to claim 1, wherein a preliminary charge part (5) and an internal charge part (6) are disposed in a main dust collection part (12) of the system, so as to apply an electric force to the system.

[5] The particle separation and collection system according to claim 1, wherein a droplet ejection system (7) is disposed in the main dust collection part (12), so as to increase the collection efficiency of the fine particles, and a dust removing system (8) is disposed in the main dust collection part (12), so as to remove the particles accumulated on the front surface of the plates (1) through the formation of a water film. [6] The particle separation and collection system according to claim 1, wherein a filter system (9) is disposed in the main dust collection part (12), so as to raise the dust collection efficiency.