CN211660255U - Electrostatic dust collector - Google Patents

Abstract

An electrostatic dust collector belongs to the technical field of electrostatic dust collection. The device comprises a first filtering device, a smoke charging device and a smoke adsorption device which are sequentially arranged along the smoke conveying direction; the smoke dust charging device comprises a charging electrode for ionizing smoke dust into smoke dust ions; the smoke adsorption device comprises an ion adsorber for adsorbing smoke ions and an ion deflection unit for deflecting the smoke ions to the ion adsorber. The charged smoke dust and oil mist particles are adsorbed on the ion adsorber under the action of mutual attraction and repulsion. Meanwhile, bacteria, germs, peculiar smell and the like in the smoke can be effectively removed.

Description

Electrostatic dust collector

Technical Field

The utility model relates to an electrostatic precipitator technical field, concretely relates to electrostatic precipitator especially relates to an electrostatic precipitator for oil smoke removes dust.

Background

Electrostatic dust removal is one of the methods of gas dust removal. The dust-containing gas is electrically separated when passing through a high-voltage electrostatic field, and dust particles and negative ions are combined to be charged negatively and then tend to discharge to the anode and are deposited on the surface of the anode.

Under the oil smoke processing scene, according to the difference of oil smoke treatment effect, can divide into low latitude oil smoke clarifier, high latitude oil smoke clarifier. According to different oil fume treatment modes, the electrostatic dust collector also derives a UV photolysis oil fume purifier. For example, chinese patent document CN106678922A, which is disclosed in 2017, 5, month and 17, describes an electrostatic oil smoke purifier, which includes a housing and an electric cabinet disposed in the housing, a control device is disposed in the electric cabinet, an air inlet and an air outlet are disposed on the housing, an air inlet pipe is externally connected to the air inlet, an air outlet pipe is externally connected to the air outlet, a flow equalizing plate and an electrostatic dust collection area are sequentially disposed in the housing according to a gas flow direction, at least one electrostatic dust collection area is disposed in the housing, an induced draft fan is further disposed in an oil smoke flow passage, the electrostatic dust collection area and the induced draft fan are both electrically connected to the control device, a first oil collection tank is disposed at the bottom of the housing and on the left side of the oil equalizing plate, and a second oil collection tank is disposed at the bottom of the; the electrostatic precipitator district is including fixed frame, first fixed plate and second fixed plate, first fixed plate is located the left side of second fixed plate, and fixed frame is fixed in the left side of first fixed plate through insulating fixed column cap and parallel with first fixed plate, still is equipped with a plurality of through-holes, and the through-hole is parallel to each other the interval arrange and be alveolate, each the through-hole all extends to the second fixed plate from first fixed plate right, is equipped with the fore-and-aft negative pole needle mounting bar that a plurality of parallel interval was arranged on the fixed frame, and along length direction interval a plurality of horizontal negative pole needles of having arranged on each negative pole needle mounting bar, and the right-hand member of negative pole needle is located the through-hole that corresponds, and fixed frame or negative pole needle are connected with the negative voltage electricity, and first fixed.

The network friend 'watching lotus 0 in rain' discloses a factor affecting the performance of an electrostatic dust collector in Baidu library, and analyzes various factors affecting the performance of the electrostatic dust collector in detail.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide an electrostatic precipitator to solve the technical problem that the existing electrostatic precipitator cannot take large and medium particle size dust particles and small particle size dust particles into account.

In order to solve the technical problems, the following technical scheme can be selected according to the needs:

an electrostatic precipitator comprises a first filtering device, a smoke charging device and a smoke adsorption device which are sequentially arranged along the smoke conveying direction; the smoke dust charging device comprises a charging electrode for ionizing smoke dust into smoke dust ions; the smoke adsorption device comprises an ion adsorber for adsorbing smoke ions and an ion deflection unit for deflecting the smoke ions to the ion adsorber.

Preferably, the ion deflection unit comprises an anode and a cathode, and the anode or the cathode of the ion deflection unit forms the ion adsorber.

Furthermore, plate-shaped electrodes are selected as the anode and the cathode, a plurality of groups of ion deflection units are arranged, and the anode and the cathode are arranged in parallel to the smoke conveying direction.

Further, the smoke dust charging device further comprises a first high-frequency high-voltage direct-current power supply electrically connected with the charging electrode, the smoke dust adsorption device further comprises a second high-frequency high-voltage direct-current power supply electrically connected with the ion deflection unit correspondingly, and the output voltage of the first high-frequency high-voltage direct-current power supply is as follows: the output voltage of the second high-frequency high-voltage direct-current power supply is 1.8-2.3: 1.

still further, the first high frequency high voltage dc power supply has an output voltage of 11kV to 13kV, the second high frequency high voltage dc power supply has an output voltage of 5.5kV to 7kV, and the distance between the anode and the cathode in one of the ion deflection units is 7 mm.

Preferably, the smoke dust collecting device further comprises a second filtering device, and the first filtering device, the smoke dust charging device, the smoke dust adsorbing device and the second filtering device are sequentially arranged in the smoke dust conveying direction.

Preferably, the first filtering device comprises a columnar stamping flow-equalizing net, the surface of the columnar stamping flow-equalizing net is honeycomb-shaped, and the meshes are S-shaped.

Preferably, the smoke dust collector further comprises a conductive shell for forming a smoke dust conveying channel, the conductive shell is electrically connected with the cathode, a first anode terminal through hole and a second anode terminal through hole are formed in the conductive shell, the charging electrode is fixed on the first anode terminal and electrically connected with the first anode terminal, the anode is fixed on the second anode terminal and electrically connected with the second anode terminal, the first anode terminal penetrates through the first anode terminal through hole and is in insulation connection with the conductive shell, and the second anode terminal penetrates through the second anode terminal through hole and is in insulation connection with the conductive shell.

Further, the first anode terminal is in insulation connection with the conductive shell through a first insulator, the second anode terminal is in insulation connection with the conductive shell through a second insulator, the first insulator is a polytetrafluoroethylene insulator or a 95 porcelain insulator, and the second insulator is a polytetrafluoroethylene insulator or a 95 porcelain insulator.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a first filter equipment makes the large granule oil drip down the effect of self gravity, is difficult for handling when avoiding it to get into the casing. The residual oil mist particles with the micro particle size enter the area of the smoke dust adsorption device after being charged by the smoke dust charging device, and the charged smoke dust and the oil mist particles are adsorbed on the ion adsorber. Meanwhile, under the deflection action of the ion deflection unit on the charged smoke dust and oil smoke, the charged smoke dust and oil mist particles are easier to approach the ion adsorber, and the adsorption effect of the electrostatic dust collector is better. Wherein, the smoke and dust charging device, the smoke and dust adsorption equipment that set up in order along smoke and dust direction of delivery form two-stage type high voltage electric field, have improved smoke and dust adsorption effect. Meanwhile, the high-voltage electric field is excited to generate ozone, so that bacteria, germs, peculiar smell and the like in the smoke can be effectively removed.

2. The utility model discloses in, ion deflection unit's positive pole or negative pole form ion adsorber, and ion adsorber still has the effect of adsorbing electrified smoke and dust and oil mist particle this moment, and it and ion deflection unit superpose the deflection effect of electrified smoke and dust and oil smoke, and electrostatic precipitator's adsorption effect is more excellent.

3. The utility model discloses smoke and dust charging device and smoke and dust adsorption equipment's voltage ratio setting helps reducing the voltage of ion deflection unit on the basis that keeps the adsorption effect, can reduce electrostatic precipitator's fault rate like this.

4. The utility model discloses take the output voltage of first high frequency high voltage direct current power supply to be 11kV ~ 13kV, the output voltage of first high frequency high voltage direct current power supply is 5.5kV ~ 7kV, one in the ion deflection unit, the positive pole with distance between the negative pole is 7mm, and such structure dust removal effect is best, and the oil smoke dust removal rate is at about 95%.

6. The utility model discloses a second filter equipment can the separation animal or object against the smoke and dust direction of delivery invade the smoke and dust adsorption equipment in, when the mesh that sets up second filter equipment is suitable size, can also form the filter action to the material in the same direction as smoke and dust direction of delivery.

6. The utility model discloses a first filter equipment adopts the surface to be honeycomb, the mesh is the column punching press of S type net of flow equally, and it is effectual to the physical separation and the balanced rectification of big particle diameter oil mist particle.

7. When the 95 porcelain insulator is adopted in the utility model, the high temperature resistance is good; when the polytetrafluoroethylene insulator is adopted, the arc resistance performance is excellent.

Drawings

Fig. 1 is a schematic circuit diagram of the high-frequency high-voltage dc output of the electrostatic precipitator of the present invention.

Fig. 2 is a perspective view of the electrostatic precipitator after the left cover, the right cover, the upper cover and the lower cover are removed.

Fig. 3 is a front view of the electrostatic precipitator of the present invention after the front cover and the rear cover are removed.

Fig. 4 is a top view of fig. 2.

Fig. 5 is a left side view of fig. 3.

Fig. 6 is a left side view of the electrostatic precipitator of the present invention.

Fig. 7 is a right side view of the electrostatic precipitator of the present invention.

Fig. 8 is a schematic circuit diagram of the high-frequency high-voltage dc output of the electrostatic precipitator of the present invention.

Fig. 9 is a schematic circuit diagram of a low voltage power supply of an electrostatic precipitator according to the present invention.

Fig. 10 is a schematic circuit diagram of a controller of an electrostatic precipitator according to the present invention.

Fig. 11 is a driving circuit diagram of the thyristor of the electrostatic precipitator of the present invention.

The reference number indicates, 30-shell, 300-fixed mount, 301-conducting rod, 302-cathode, 303-first filter, 304-second filter, 31-smoke charging device, 310-first anode terminal, 311-charging electrode, 32-smoke adsorbing device, 320-second anode terminal, 321-anode, 322-fixed plate.

Detailed Description

The present invention is described below in terms of embodiments with reference to the accompanying drawings to assist those skilled in the art in understanding and realizing the invention. Unless otherwise indicated, the following embodiments and technical terms therein should not be understood to depart from the background of the technical knowledge in the technical field.

Example 1: an electrostatic precipitator, see fig. 2-7, comprises a first filtering device 303, a smoke charging device 31 and a smoke adsorbing device 32 which are arranged in sequence along the smoke conveying direction. In order to guide the conveying direction of the smoke dust, the electrostatic precipitator further comprises a casing 30 for forming a smoke dust conveying channel, and the first filtering device 303, the smoke dust charging device 31 and the smoke dust adsorbing device 32 are arranged at corresponding positions of the casing 30 so as to realize the functions described above or below.

Therein, the smoke charging means 31 comprises a charging electrode 311 for ionizing the smoke into smoke ions. The charging electrode 311 may be a plate electrode, and the plate electrode may be made of Bs aircraft aluminum material. Preferably, the smoke charging device 31 may further include a first high-frequency high-voltage dc power supply (not shown) electrically connected to the charging electrode 311. The first high frequency high voltage dc power supply has a high voltage output terminal electrically connected to the charging electrode 311 and a low voltage output terminal connected to ground.

The smoke adsorbing device 32 includes an ion adsorber for adsorbing smoke ions and an ion deflecting unit for deflecting the smoke ions toward the ion adsorber. Preferably, the ion deflection unit comprises a cathode 302, an anode 321, the anode 321 or the cathode 302 of the ion deflection unit forming an ion adsorber. In this embodiment, the charging electrode is an anode, and thus the cathode 302 of the ion deflection unit forms an ion adsorption electrode. In other embodiments, if the charging electrode is a cathode, the anode 321 of the ion deflection unit forms an ion adsorption electrode. The cathode 302 can be made of plate-shaped electrode, the anode 321 can also be made of plate-shaped electrode, and the plate-shaped electrode can be made of Bs aviation aluminum material. Preferably, the soot absorption device 32 further comprises a second high frequency high voltage dc power supply (not shown) electrically connected to the ion deflection unit. The second high frequency, high voltage dc power supply has a high voltage output electrically connected to the anode 321 and a low voltage output electrically connected to the cathode 302.

Preferably, the output voltage of the first high-frequency high-voltage direct current power supply is: the output voltage of the second high-frequency high-voltage direct-current power supply is 1.8-2.3: 1.

the first high-frequency high-voltage direct-current power supply can select a high-frequency high-voltage power supply with a PWM harmonic correction function. The second high-frequency high-voltage direct-current power supply can also select a high-frequency high-voltage power supply with a PWM harmonic correction function. Referring to fig. 1, a red indicator HR is connected in series to the RD pin and the COM pin of the high-frequency high-voltage power supply Hvp, and a green indicator HG is connected in series to the GN pin and the COM pin of the high-frequency high-voltage power supply Hvp. In fig. 1, the FAN is installed at the matching position of the high-voltage power supply to accelerate the heat dissipation of the high-voltage power supply and avoid the problem of dust removal failure caused by shutdown of the high-voltage power supply when the temperature of the high-voltage power supply rises to reach the shutdown threshold value. And the limit switch SQ is arranged at the access door of the conductive shell and used for detecting the opening and closing state of the access door. When the access door is in an open state, the limit switch SQ is disconnected, and the high-frequency high-voltage power supply Hvp and the FAN FAN are disconnected with the power supply.

Preferably, the anode and the cathode are both plate-shaped electrodes, the ion deflection unit has multiple groups, and the anode and the cathode are arranged in parallel to the smoke conveying direction. Specifically, the cathode 302 is provided with a mounting hole, the conductive rod 301 penetrates through the mounting hole to be electrically connected with the cathode 302, a shoulder expanding sleeve sleeved on the conductive rod 301 is arranged between two adjacent cathodes 302, the shoulder expanding sleeve can limit the distance between the two adjacent cathodes 302, and the strength of the connection structure of the cathode 302 and the conductive rod 301 is increased. Preferably, a mounting hole is formed in the anode 321, the second anode terminal 320 penetrates through the mounting hole to be electrically connected with the anode 321, a shoulder expanding sleeve sleeved on the second anode terminal 320 is arranged between two adjacent anodes 321, the shoulder expanding sleeve can limit the distance between the two adjacent anodes 321, and the strength of the connection structure of the anode 321 and the second anode terminal 320 is increased.

Further, the output voltage of the first high-frequency high-voltage direct-current power supply is 11kV to 13kV, the output voltage of the second high-frequency high-voltage direct-current power supply is 5.5kV to 7kV, and the distance between the anode and the cathode is 7mm in one ion deflection unit.

Referring to fig. 2 to 7, the housing 30 includes a fixing frame 300, and a left cover, a right cover, an upper cover, a lower cover, a front cover, and a rear cover mounted on the fixing frame 300. The left cover is provided with an inlet for the smoke to enter the housing 30 and the first filter means 303 is mounted on the left cover so that the inlet is divided into suitable dispersion ports by the first filter means 303. The right cap is provided with an outlet for the gas to be discharged from the housing 30, and the second filter means 304 is mounted on the right cap such that the outlet is divided into suitable dispersion ports by the second filter means 304. The upper cover and the lower cover are not provided with openings to avoid the escape of smoke dust. The front cover and the rear cover are both provided with a first anode binding post through hole and a second anode binding post through hole.

The shell can be selected from a conductive shell, the first anode terminal 310 penetrates through the front and back surfaces of the shell 30 through the first anode terminal through hole, and the first anode terminal 310 is fixedly connected with the shell 30 in an insulating manner through an insulator. The second anode terminal 320 penetrates through the front and rear surfaces of the case 30 through the second anode terminal through hole, and the second anode terminal 320 is fixedly connected with the case 30 through an insulator in an insulating manner. The insulator can be selected from polytetrafluoroethylene insulator or 95 porcelain insulator. The polytetrafluoroethylene insulator has excellent insulating property and arc resistance. The 95 porcelain has high temperature resistance, the high temperature resistance can reach 1500 ℃, and the rapid cooling and heating resistance effect is good. The surface of the 95 porcelain insulator is provided with a wavy surface, so that the creepage distance is increased, the current is effectively isolated, and the insulator is not easy to be electrically punctured. The conductive rod 301 is also fixedly connected in the conductive shell, the cathode 302 is fixedly connected with the conductive rod 301, and the cathode 302 and the anode 321 are arranged in a staggered manner.

Preferably, referring to fig. 6, the first filtering device 303 includes a cylindrical punching flow-equalizing net, the surface of which is honeycomb-shaped, and the meshes are S-shaped.

When in use, the smoke flow rate is approximately equal to 3m/s and is filled into the shell 30 through the first filtering device 303. When smoke dust passes through the first filtering device 303, the oil mist particles with large particle size are physically separated and are evenly rectified, and the separated large oil drops flow into the oil groove under the action of self gravity and are discharged. When the remaining fine-particle-size oil mist particles enter the charging region formed by the charging electrode 311, the smoke and the oil mist particles are positively charged; when the positively charged soot and dust enter the soot adsorbing device (i.e., between the anode and the cathode), the cathode is able to adsorb the positively charged soot and mist particles in its vicinity. The smoke and oil mist particles far away from the cathode approach the cathode under the electric field formed by the ion deflection unit and are adsorbed on the cathode. Meanwhile, the high-voltage electric field is excited to generate ozone, so that bacteria, germs, peculiar smell and the like in the smoke can be effectively removed. The treated gas stream passes through a second filter device 304.

According to measurement and calculation, the flow rate of the smoke dust is approximately equal to 3m/s, the smoke dust is filled into the shell 30 through the first filtering device 303, and the first anode binding post is electrically connected with +12KV voltage; the second anode wiring terminal is electrically connected with +6kV, the conductive shell is grounded, and when the distance between the cathode 302 and the anode 321 is 7mm, the oil fume purification rate is 95%, so that the low-altitude emission requirement is met.

Example 2: an electrostatic precipitator, see fig. 2-7, comprises a first filter 303, a smoke charging device 31, a smoke adsorbing device 32, and a second filter 304, which are arranged in sequence along the smoke conveying direction. The aperture of the filter holes of the second filter device is set as required, the second filter device can be used for preventing animals or objects from entering the smoke adsorption device along the smoke conveying direction, and when the mesh holes of the second filter device are set to be proper in size, the second filter device can also filter substances along the smoke conveying direction.

The same means as employed in embodiment 1 in this embodiment may be used instead.

In an embodiment, the high frequency, high voltage power supply is formed using the circuits shown in fig. 8-11. Referring to fig. 8-11, the output voltage V1+ is approximately +12KV for electrical connection to the first anode terminal; the output voltage V2+ is about +6kV and is used for electrically connecting the second anode terminal, and the conductive housing is grounded. When the high-frequency high-voltage power supply is used, the potentiometer RP87 is adjusted to enable the high-frequency high-voltage power supply to be in a working mode. Pin 15 of the controller U9 outputs a high level and pin 16 outputs a square wave control signal with a duty cycle of 0.5. Pin 17 of the controller U9 outputs a high level and pin 18 outputs a square wave control signal with a duty cycle of 0.5. 380VAC voltage is rectified into 580V direct current, a thyristor T11, a thyristor T12, a thyristor T13 and a thyristor T14 are driven through an MC74AC08 four-input AND gate, high-frequency alternating current flows through an LC oscillating circuit to form high-frequency low-voltage alternating current, the high-frequency low-voltage alternating current is converted by an inverter to form high-frequency high-voltage alternating current, and the high-frequency high-voltage alternating current is rectified by a high-voltage silicon push to form high-frequency on-off high-voltage direct current. The pulse width of the square wave control signals output by the pins 16 and 18 is related to the frequency of the high-frequency on-off high-voltage direct current.

The present invention has been described in detail with reference to the accompanying drawings and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts of the present invention are presented herein by way of illustration as much as possible. Without departing from the inventive concept of the present invention and without paying creative labor, technical personnel in the technical field can make or delete combinations, specific parameters to perform experimental changes to the technical features in the above embodiments, or use the prior art in the technical field to perform the specific embodiments of conventional replacement and formation by the disclosed technical means, which all belong to the content hidden in the present invention.

Claims (9)

1. An electrostatic precipitator is characterized by comprising a first filtering device, a smoke charging device and a smoke adsorption device which are sequentially arranged along the smoke conveying direction; the smoke dust charging device comprises a charging electrode for ionizing smoke dust into smoke dust ions; the smoke adsorption device comprises an ion adsorber for adsorbing smoke ions and an ion deflection unit for deflecting the smoke ions to the ion adsorber.

2. The electrostatic precipitator of claim 1, wherein said ion deflection unit comprises an anode, a cathode, and wherein either the anode or the cathode of said ion deflection unit forms said ion adsorber.

3. The electrostatic precipitator according to claim 2, wherein said anodes and cathodes are plate-like electrodes, and said ion deflection unit has a plurality of groups, and said anodes and cathodes are arranged in parallel to the soot conveying direction.

4. The electrostatic precipitator according to claim 3, wherein said soot charging device further comprises a first high frequency high voltage dc power supply electrically connected to said charging electrode, said soot adsorbing device further comprises a second high frequency high voltage dc power supply electrically connected to said ion deflecting unit, said first high frequency high voltage dc power supply having an output voltage of: the output voltage of the second high-frequency high-voltage direct-current power supply is 1.8-2.3: 1.

5. an electrostatic precipitator according to claim 4, in which the output voltage of the first high frequency high voltage DC power supply is 11kV to 13kV, the output voltage of the first high frequency high voltage DC power supply is 5.5kV to 7kV, and the distance between the anode and the cathode in one of the ion deflection units is 7 mm.

6. The electrostatic precipitator of claim 2, further comprising an electrically conductive housing for forming a soot delivery passage, said electrically conductive housing being electrically connected to said cathode, said electrically conductive housing having a first anode terminal aperture and a second anode terminal aperture, said charge electrode being secured to and electrically connected to said first anode terminal, said anode being secured to and electrically connected to said second anode terminal, said first anode terminal extending through said first anode terminal aperture and being electrically isolated from said electrically conductive housing, said second anode terminal extending through said second anode terminal aperture and being electrically isolated from said electrically conductive housing.

7. The electrostatic precipitator of claim 6, wherein said first anode terminal is in insulated connection with said conductive housing by a first insulator, said second anode terminal is in insulated connection with said conductive housing by a second insulator, said first insulator is selected from the group consisting of a teflon insulator or a 95 porcelain insulator, and said second insulator is selected from the group consisting of a teflon insulator or a 95 porcelain insulator.

8. The electrostatic precipitator according to claim 1, further comprising a second filter device, wherein said first filter device, the soot charging device, the soot adsorbing device, and the second filter device are arranged in sequence in a soot conveying direction.

9. The electrostatic precipitator of claim 1, wherein said first filter means comprises a cylindrical stamped flow-equalizing mesh having a honeycomb-like surface and an S-shaped mesh.

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