CN210279490U

CN210279490U - Electrostatic dust removal device and filtering system using same

Info

Publication number: CN210279490U
Application number: CN201920397826.4U
Authority: CN
Inventors: 蔡春进; 缪其轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-04-10
Anticipated expiration: 2029-03-27

Abstract

The utility model relates to an electrostatic dust collector, which comprises a shell, a high-voltage electrode group and a grounding metal net. The high-voltage electrode group is arranged in the shell and is provided with a frame body and a plurality of electrode rods, each electrode rod is arranged in the frame body and is connected with the frame body, and each electrode rod is provided with a plurality of steel nails. Each electrode rod is electrically connected with a power supply to discharge at the tip of the steel nail. The grounding metal net is arranged in the shell and positioned between the high-voltage electrode group and the exhaust port of the shell. The grounded metal mesh is provided with a plurality of through holes for air flow to pass through, so that charged particles can be attracted by the grounded metal mesh and collected. The utility model discloses an electrostatic precipitation device's overall structure is comparatively sturdy and durable and the cost is lower, can collect the particle in the air current effectively.

Description

Electrostatic dust removal device and filtering system using same

Technical Field

The utility model relates to an electrostatic precipitator device to and one set of filtration system who combines this electrostatic precipitator device and filter screen. In particular to an electrostatic dust collection device with low manufacturing cost and firmness and durability, and the electrostatic dust collection device is combined with filter screens made of various materials to improve the filtering efficiency and prolong the service life of the filter screens.

Background

In recent years, pollution of fine particles (PM2.5) has attracted attention of most people, and many countries have the problem that the concentration of PM2.5 exceeds the standard, so that the health of local residents is seriously affected. In order to effectively reduce the emission of PM2.5, a filtration system is provided in various pollution sources that emit PM2.5, such as coal-fired power plants, restaurants, and petrochemical industries. Conventional filtration systems fall into two categories depending on their mode of action, one being the use of electrostatic precipitation devices alone, where many restaurants cannot install expensive and easily damaged old electrostatic precipitation equipment due to low capital costs.

The electrostatic dust collector has an action principle that corona discharge is generated on an electrode of the electrostatic dust collector by using high-voltage electricity to release a large amount of ions, so that particles in passing air flow are charged, move towards a collecting plate of the electrostatic dust collector through the action of an electric field and are further collected by the collecting plate. Although the conventional electrostatic dust collector, such as a two-stage electrostatic Precipitator (2-stage electrostatic Precipitator), has a relatively high collection efficiency for particles, the electrode wires and the collection plates on the electrodes are easily contaminated by the particles. Secondly, the electrode wire of the conventional electrostatic dust collecting device has a fragile structure, is easily damaged by sucking foreign matters in the dust collecting process, and is expensive. Finally, since the collecting plate of the conventional electrostatic precipitator is installed in a direction parallel to the flow direction of the air stream, a back corona phenomenon may occur, so that the particles collected by the collecting plate may be re-suspended in the air stream, thereby reducing the collecting efficiency of the particles. It can be seen that the conventional electrostatic dust collecting apparatus has room for improvement.

Another filtering system is to use a filter net to filter, but the traditional filter net does not have static electricity, or the traditional filter net with static electricity reduces the static electricity adhesion amount on the surface of the filter net along with the use time, so the dust removing efficiency is low, and the dust removing efficiency also reduces along with the increase of the use time.

Disclosure of Invention

In view of the above, an object of the present invention is to provide an electrostatic precipitator which is structurally sturdy and low in cost, but can effectively achieve the effect of dust removal.

In order to achieve the above object, the present invention provides an electrostatic precipitator, which is characterized in that it comprises: the shell is hollow and provided with a cavity, and the shell is also provided with an air inlet and an air outlet which are communicated with the cavity and the outside of the shell; the high-voltage electrode group is detachably arranged in the shell and is provided with a frame body and a plurality of electrode rods, the electrode rods are arranged in the frame body and connected with the frame body, a plurality of steel nails are arranged on the electrode rods, the tips of the steel nails point to the direction far away from the air inlet, and the electrode rods are electrically connected with a high-voltage power supply; the grounding metal net is detachably arranged in the shell and positioned between the high-voltage electrode group and the exhaust port, and a plurality of through holes are formed in the grounding metal net.

Above-mentioned among the technical scheme of the utility model, each the electrode bar all is equipped with the external screw thread, high voltage electrode group more includes a plurality of nuts, each the steel nail all respectively a to one ground rigid coupling in each the surface of nut, each the nut all adopts conducting material to make, and each the nut spiro union in each one of them of electrode bar.

Each electrode bar is provided with a plurality of fixing holes, and each steel nail is respectively fixed in each fixing hole in a one-to-one mode.

The shell is made of an insulating material.

The shell is made of polyvinyl chloride.

The plane formed by the grounding metal mesh and the plane formed by the high-voltage electrode group are perpendicular to the direction of the airflow entering the air inlet.

In addition, in order to improve the filtration efficiency of dust, oil drop, the utility model also provides a filtration system, its characterized in that includes: an electrostatic precipitator as described above; the gas channel is connected with the exhaust port of the electrostatic dust collection device; at least one filter screen is located follow with filtering in the gas passage the gas stream of gas vent exhaust, the filter screen adopts the static filter media to make, the static filter media can be by the particle friction in the air current and electrified, makes the filter screen surface energy stably have static in order to improve the filter efficiency of filter screen to dust, oil drip.

Wherein, the quantity of an at least filter screen is two and is a medium efficiency filter screen and a high efficiency filter screen respectively, the medium efficiency filter screen is located electrostatic precipitator device with between the high efficiency filter screen, the particle collection efficiency of high efficiency filter screen is higher than the medium efficiency filter screen.

Adopt above-mentioned technical scheme, the utility model discloses an above-mentioned electrostatic precipitation device's high voltage electrode group's steel nail discharges, compares in using the wire electrode, and the high voltage electrode group's that uses the steel nail overall cost is lower, and structural also comparatively sturdy and durable, also can reach the effect of discharging that is close mutually with the wire electrode moreover equally.

In one aspect, the steel nail may be a nail-like structure made of other types of alloys.

In another aspect, the filter device may be used to filter soot, dust, or other particulates from an air stream.

In another aspect, the electrode rods of the high voltage electrode assembly may be made of carbon fiber bundles, stainless steel, copper or aluminum.

In another aspect, the housing can be made of an insulating material (e.g., polyvinyl chloride; PVC). PVC has the advantages of light weight, excellent chemical resistance, small fluid resistance, large mechanical strength and good electrical insulation, and can reduce pressure loss and avoid the danger of electric shock or electric leakage.

Drawings

Fig. 1 is a schematic view of a first embodiment of the present invention;

fig. 2 is a perspective view of a lampblack filter system according to a first embodiment of the present invention;

fig. 3 is a perspective view of an electrostatic precipitator according to a first embodiment of the present invention;

fig. 4 is a perspective view of a high voltage electrode assembly according to a first embodiment of the present invention;

FIG. 5 is an enlarged view of the electrode rod of FIG. 4;

FIG. 6 is an enlarged view of the steel nail and nut of FIG. 4;

fig. 7 is a perspective view of a grounding metal mesh according to a first embodiment of the present invention;

fig. 8 is a perspective view of a smoke filter according to a second embodiment of the present invention;

fig. 9 is a graph of particulate accumulation versus collection efficiency.

Detailed Description

For the purpose of illustrating the structure, features and functions of the present invention in detail, the following preferred embodiments are described with reference to the accompanying drawings.

As shown in fig. 1 and 2, the first embodiment of the present invention describes an oil smoke filtering system 1, which comprises an electrostatic dust collector 10, a high voltage power supply 20, a post-treatment filter bag 4 and an exhaust fan 5, wherein the electrostatic dust collector 10 and the post-treatment filter bag 4 are used for filtering particles in an air flow, the exhaust fan 5 is used for pumping air to form an air flow, so that the air flow passes through the electrostatic dust collector 10 and the post-treatment filter bag 4, the front end of the electrostatic dust collector 10 is provided with a pipeline 2, the electrostatic dust collector 10 and the post-treatment filter bag 4 are provided with a pipeline 3, and a pipeline 6 is arranged between the post-treatment filter bag 4 and the exhaust fan 5. As shown in fig. 2, the post-treatment filter bag 4 is disposed at the rear side of the electrostatic dust collector 10, the post-treatment filter bag 4 includes a gas passage 7, the gas passage 7 is connected to the electrostatic dust collector 10, and a middle-efficiency filter screen 8 and a high-efficiency filter screen 9 are disposed inside the gas passage 7. The high efficiency filter screen 9 has a higher collection efficiency than the medium efficiency filter screen 8. The medium-efficiency filter net 8 and the high-efficiency filter net 9 are made of various static filter materials, which can be synthetic fibers (such as polypropylene), and the data in this respect can be referred to the article written by Vaughn, E Howard-Reed, C, Fiber Glass vs. When the airflow passes through the electrostatic filtering material, the particles in the airflow rub against the electrostatic filtering material to charge the electrostatic filtering material, so as to increase the collection efficiency of the particles. The power supply 20 is a high voltage power supply in this embodiment of the Spellman TF _ SL30N150, which is used to provide a negative high voltage electrical signal up to-30 kV (kilovolts).

As shown in fig. 1 and 3, a perspective view of the electrostatic precipitator 10 is shown. The electrostatic precipitator 10 structurally comprises a housing 30, a high voltage electrode assembly 40 and a grounding metal mesh 50, wherein:

the housing 30 includes an air inlet 31 and an air outlet 32, and the interior of the housing 30 is hollow and has a cavity 33, the air inlet 31 is communicated with the cavity 33 and connected with the pipeline 2, the air outlet 32 is communicated with the cavity 33 and the pipeline 3, the housing 30 is made of PVC material to achieve the insulation effect.

As shown in fig. 4 to 6, the high voltage electrode group 40 is detachably disposed in the housing 30, and structurally includes a frame 41, nine electrode rods 42, eighty-one nuts 43, and eighty-one steel nails 44, the nine electrode rods 42 are arranged in parallel in the frame 41, and the upper and lower ends of each electrode rod 42 are connected to the frame 41 (as shown in fig. 4). Each electrode rod 42 is provided with an external thread 421, each steel nail 44 is fixedly connected with the outer surface of the nut 43, the nut 43 is made of metal, and the steel nail 44 is screwed on each electrode rod 42 through the nut 43. In the present embodiment, each electrode rod 42 is provided with nine steel nails 44 (shown in fig. 5), and the tip 441 of each steel nail 44 is directed away from the air inlet 31 (i.e., directed toward the grounding wire 50, which will be described later). The spacing between any two adjacent steel nails 44 is 6 centimeters (cm), and the tip 441 of the steel nail 44 has a size of about 373 micrometers (μm). Each electrode rod 42 is electrically connected to the power supply 20 to enable the tip 441 of the steel nail 44 to generate a Corona discharge effect (Corona discharge) to charge particles in the gas stream passing through the high voltage electrode assembly 40.

As shown in fig. 3 and 7, the grounding metal net 50 is detachably disposed in the housing 30 between the high voltage electrode group 40 and the exhaust port 32, and the distance between the grounding metal net 50 and the tip 441 of the steel nail 44 is 3 centimeters (cm). The grounding metal net 50 is grounded. The grounding metal net 50 has a frame 51 and is provided with a plurality of through holes 52 therein, the through holes 52 being used for the air flow to pass through, and the grounding metal net 50 is detachably mounted to the chamber 33 through the frame 51.

It should be noted that, in the embodiment shown in fig. 3, the plane formed by the grounded metal mesh 50 and the plane formed by the high voltage electrode group 40 are substantially perpendicular to the flow direction of the airflow (i.e. the direction of the airflow entering the air inlet 31), so as to reduce the occurrence probability of the back corona phenomenon, and even if the particles are collected and then resuspended in the airflow, the resuspended particles can be collected again by the grounded metal mesh 50.

Referring back to fig. 1 and 3, with the design of the electrostatic precipitator 10 of the present embodiment, when the exhaust fan 5 starts to draw air, the air flow enters the chamber 33 of the electrostatic precipitator 10 from the pipeline 2 and the air inlet 31. As the gas stream passes through the high voltage electrode assembly 40, the particles in the gas stream become charged by the corona discharge at the tip 441 of the steel nail 44 of the high voltage electrode assembly 40. When the air flow passes through the grounding metal net 50, the charged particles in the air flow are attracted by the grounding metal net 50 and collected by the grounding metal net 50, so as to remove the particles in the air flow and reduce the load of the post-treatment filter bag 4.

Compared with the conventional electrostatic dust removal device that uses a wire electrode to charge particles in an air flow, the electrostatic dust removal device 10 of the present embodiment uses the steel nail 44 to charge particles, and as a result of a plurality of tests performed by the inventor, the high voltage electrode group 40 of the present embodiment can generate higher electric field strength and current density, so that the electrostatic dust removal device 10 can have higher collection efficiency. In addition, the overall structure of the electrostatic precipitator 10 is low in cost, and the high-voltage electrode group 40 is not easy to be damaged by the impact of foreign matters in the airflow, so that the service life of the electrostatic precipitator is prolonged, and the characteristics of the present invention are shown above.

The present invention further provides a second embodiment, as shown in fig. 8. The lampblack filtering system 1 of the second embodiment comprises an electrostatic dust collector 10 and a gas channel 7 connected with the electrostatic dust collector 10, wherein the gas channel 7 also has a middle-efficiency filter screen 8 and a high-efficiency filter screen 9 which have the same structure and the same material inside.

The electrostatic precipitator 10 comprises two sets of high voltage electrode sets 40a, 40b and grounded

metal meshes

50a, 50b, wherein the high voltage electrode set 40a has 12 electrode rods 42 and 144 steel nails 44, and the steel nails 44 are spaced apart by 4.7 cm. The high voltage electrode assembly 40b is provided with 196 steel nails 44, the steel nails 44 being spaced apart from each other by 4 cm. The electrode rod 42 is provided with a plurality of fixing holes 422 using a drill, and the steel nails 44 are fixed to the fixing holes 422 in a close-fitting manner one for one.

As shown in fig. 9, it is a graph of the particulate accumulation amount and the collection efficiency of the lampblack filter system 1 of the second embodiment. FM + FH + ESP represents the measured data for the second embodiment (i.e., including one high efficiency filter 9 and one medium efficiency filter 8, and using the high voltage electrode sets 40a, 40b and the grounded

metal meshes

50a, 50 b). FH + FH indicates the case of filtering with only the two-layer high efficiency filter 9 (but without the high voltage electrode sets 40a, 40b and the grounding

metal meshes

50a, 50b), and FM + FH indicates the case of filtering with only the one-layer high efficiency filter 9 and the one-layer medium efficiency filter 8 (but without the high voltage electrode sets 40a, 40b and the grounding

metal meshes

50a, 50 b). It can be seen that in all three cases the initial collection efficiency is higher than 95%, but as the particles accumulate, the collection efficiency of the filter system 1 will decrease, when the particle accumulation reaches 8g/m²In the meantime, only the collection efficiency of the filter system 1 of the second embodiment can be maintained at 90%, which can meet the regulations of cooking fume air pollutant regulations and emission standards (draft).

The above mentioned embodiments are only examples of the present invention, and all equivalent changes and modifications made according to the present invention, claims and drawings should be covered by the protection scope of the present invention.

Claims

1. An electrostatic precipitator, comprising:

the shell is hollow and provided with a cavity, and the shell is also provided with an air inlet and an air outlet which are communicated with the cavity and the outside of the shell;

the high-voltage electrode group is detachably arranged in the shell and is provided with a frame body and a plurality of electrode rods, the electrode rods are arranged in the frame body and connected with the frame body, a plurality of steel nails are arranged on the electrode rods, the tips of the steel nails point to the direction far away from the air inlet, and the electrode rods are electrically connected with a high-voltage power supply;

the grounding metal net is detachably arranged in the shell and positioned between the high-voltage electrode group and the exhaust port, and a plurality of through holes are formed in the grounding metal net.

2. The electrostatic precipitator apparatus of claim 1, wherein: the high-voltage electrode group further comprises a plurality of screw caps, the steel nails are respectively and correspondingly fixed on the outer surfaces of the screw caps, the screw caps are made of conductive materials, and the screw caps are screwed on one of the electrode rods.

3. The electrostatic precipitator apparatus of claim 1, wherein: each electrode bar is provided with a plurality of fixing holes, and each steel nail is respectively fixed in each fixing hole in a one-to-one mode.

4. The electrostatic precipitator apparatus of claim 1, wherein: the shell is made of an insulating material.

5. The electrostatic precipitator apparatus of claim 4, wherein: the shell is made of polyvinyl chloride.

6. The electrostatic precipitator apparatus of claim 1, wherein: the plane formed by the grounding metal mesh and the plane formed by the high-voltage electrode group are perpendicular to the direction of the airflow entering the air inlet.

7. A filtration system, comprising:

an electrostatic precipitator in accordance with claim 1;

the gas channel is connected with the exhaust port of the electrostatic dust collection device;

the filter screen is arranged in the gas channel to filter the airflow discharged from the gas outlet, and is made of an electrostatic filter material which can be rubbed by particles in the airflow to be charged.

8. The filtration system of claim 7, wherein: the quantity of at least one filter screen is two and is a medium efficiency filter screen and a high efficiency filter screen respectively, the medium efficiency filter screen is located electrostatic precipitator device with between the high efficiency filter screen, the particle collection efficiency of high efficiency filter screen is higher than the medium efficiency filter screen.