CN207584924U - A kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle - Google Patents

Abstract

The utility model relates to a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification, which mainly includes a box body, a grid plate, a motor, a central shaft, a fan casing, a fan, an electromagnetic clutch, a push-pull dust collection tank, an annular metal Net, flat key, fiber membrane, brush and filter assembly, the fiber membrane with raised soft brush is installed on the ring metal net, the brush and the first layer of the filter assembly are in contact with the surface of the electrospun fiber membrane, and the mutual friction makes the contact surface generate Charge transfer, resulting in static electricity. An electromagnetic clutch is installed between the fan and the ring metal mesh to make the brushes and filter components rub intermittently, delaying the time for neutralizing the charge of the fiber membrane with raised soft brushes and the filter components, reducing membrane loss and improving electrification durability. The filter assembly in the utility model has good charging performance and filtering performance as a whole, the fiber is degradable, green and environmentally friendly, self-excited friction electrostatic dust removal can significantly reduce energy consumption and equipment costs, the device is simple and convenient, and the ultra-small volume can save indoor space .

Description

A high-efficiency electrostatic precipitator based on the principle of differential brush friction electrification

technical field

The invention relates to a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification, which belongs to the technical field of air purification.

Background technique

Air pollution is becoming more and more serious, and air pollutants are showing new characteristics: the proportion of fine particle pollutants in the air is increasing, and the combined pollution of the atmosphere is aggravating. According to the data of the World Health Organization, the number of people who die from indoor air pollution worldwide reaches 2.8 million every year, while in my country, the number of excess deaths caused by indoor air pollution reaches 111,000, and the number of excess emergency visits reaches 4.3 million. Therefore, it is of great significance to develop a device for effectively purifying air.

At present, the indoor air purification methods at home and abroad mainly include electrostatic dust removal method, wet dust removal method, adsorption purification method and low temperature plasma method. However, using the above technologies alone generally has problems such as poor effect, high energy consumption, and easy blockage. Among them, the wet dust removal cost is high and maintenance is difficult; the low-temperature plasma method is easy to generate ozone and form secondary pollution. Electret electrostatic precipitators have problems such as short-term static residence and electrostatic loss; the effect of electret is greatly affected by temperature and humidity, and the filtering effect is unstable; a large amount of dust accumulation on the surface of the filter membrane increases the filtration pressure loss, resulting in energy loss. High consumption, short membrane life.

In view of the above problems, the present invention proposes a high-efficiency electrostatic precipitator based on the principle of differential brush friction electrification. Based on the principle of triboelectricity, the device combines fiber filtration and electrostatic adsorption, which can achieve the goal of air purification with high efficiency and low energy consumption. At the same time, the device is simple and the ultra-small volume saves indoor space.

Contents of the invention

The invention proposes a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electretization, which adopts melt electrospun electret air filter material, and has good charging performance and filtering performance; based on the principle of friction electrification, the filter assembly and brush Mutual friction generates static electricity, which has the advantages of electrostatic dust removal and adsorption of tiny particles of bacteria; an electromagnetic clutch is installed between the fan and the ring metal mesh to reduce the friction frequency of the brush, reduce film loss and improve electrification durability. While the brush generates static electricity by friction, it can clean up the pollutants attached to the surface of the fiber membrane, which is not easy to be blocked and reduces the filtration resistance.

The technical solution to achieve the above purpose is: a high-efficiency electrostatic precipitator based on the principle of differential brush friction electrification, which mainly includes: box body, grid plate, motor, central shaft, fan casing, fan, electromagnetic clutch, push-pull collector Dust tank, ring metal mesh, flat key, fiber membrane, brush, filter components, etc. The grid plate and the filter assembly are respectively placed at the air inlet end and the air outlet end of the box body. The fan is installed in the fan housing and fits with the box in an interference fit, the central axis is located at the center, and the motor is coaxially arranged with the fan, ring metal mesh and electromagnetic clutch. The electromagnetic clutch is connected with the central shaft by a flat key. A fiber membrane with raised soft brushes is installed on the ring metal mesh. The brushes contact with the surface of the electrospun fiber membrane on the first layer of the filter assembly, and rub against each other to cause charge transfer on the contact surface and generate static electricity. An electromagnetic clutch is installed between the fan and the ring metal mesh to make the brushes and filter components rub intermittently, delaying the neutralization time of the fiber membrane with raised soft brushes and the filter components, reducing membrane loss and improving electrification durability. The push-pull dust collection tank is placed directly under the filter assembly, the brush can clean the pollutants attached to the surface of the fiber membrane, and the push-pull dust collection tank can collect the pollutants in time.

The invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. The fiber filter component is prepared by using the melt electrospinning method and polylactic acid as a raw material. The filter component is composed of three layers of fiber membranes. The diameter of the fibers of the first electrospun fiber membrane is 3-5 μm, uniformly mixed with a certain proportion of electret, such as tourmaline powder, ZnO particles or _TiO2 particles; the fiber diameters of the second and third layers of electrospun fiber membranes are 1~3μm, 0.2~1μm. The thickness range of each layer of fiber membrane is 10-20 μm, the range of pore diameter is 300 nm-1 μm, and the porosity is greater than 70%.

The present invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. A fiber membrane with a raised soft brush is installed on the annular metal mesh. The surface pressure ranges from 30 to 45N.

The present invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush triboelectrification. The brush and the first layer of electrospun fiber membrane of the filter assembly rub against each other to cause charge transfer on the contact surface. The fiber membrane with the brush and the filter assembly The first layer of electrospun fiber membrane loses electrons, or gains electrons to be positively or negatively charged, so that the fibers remain charged.

The present invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. The central axis is located at the center, and the motor is coaxially arranged with the fan, the ring metal mesh and the electromagnetic clutch. The motor drives the fan and the ring metal mesh to rotate at the same speed. The speed range is 500~1000r/min. An electromagnetic clutch is installed between the fan and the ring metal net to make the brushes and the filter components rub intermittently, the contact frequency ranges from 35 to 50 times per minute, and the time for neutralizing the charge of the fiber membrane with raised soft brushes and the filter components is delayed , reduce film loss and improve charge durability.

The invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. The brush can clean the pollutants attached to the surface of the membrane while rubbing against the filter assembly, and the push-pull dust collection tank can collect the pollutants in time.

By the introduction of above technical scheme, compared with the prior art, the present invention has the following advantages:

1. Polylactic acid is used as a raw material to prepare fiber filter components by melt electrospinning. The filter components have good charging performance and filtration performance as a whole, and the fibers are degradable and environmentally friendly.

2. The first layer of electrospun fiber membrane containing electret and the soft brush with protrusions form a friction surface, which makes the surface of the fiber generate static electricity, which can generate charges for a long time and maintain an efficient electrostatic dust removal effect.

3. The electromagnetic clutch reduces the friction frequency, reduces the membrane loss, and improves the electrification durability of the fiber membrane.

4. Self-excited friction electrostatic precipitator has the advantages of low wind resistance of electrostatic precipitator, but it does not need to connect tens of thousands of volts externally and vibration cleaning necessary for traditional electrostatic precipitator, which can significantly reduce energy consumption and equipment cost.

5. The installation is simple and convenient, and the ultra-small volume saves indoor space.

Description of drawings

Fig. 1 is a schematic diagram of a high-efficiency electrostatic precipitator based on the principle of differential brush friction electrification according to the present invention;

Fig. 2 is a schematic structural view of the filter assembly in the present invention;

Fig. 3 is a schematic diagram of the frictional electrostatic dust removal process of the present invention.

In the figure: 1-box; 2-grid; 3-motor; 4-central shaft; 5-fan casing; 6-fan; 7-electromagnetic clutch; 8-push-pull dust collection tank; 9-ring metal mesh ;10-flat key; 11-fiber membrane; 12-brush; 13-filter assembly; 13-1-sealing strip; 13-2-first layer of electrospun fiber membrane; Membrane; 13-4-Third layer of electrospun fiber membrane.

Detailed ways

The present invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification, as shown in Figure 1, which mainly includes: a box body 1, a grid plate 2, a motor 3, a central shaft 4, a fan casing 5, and a fan 6 , Electromagnetic clutch 7, push-pull dust collection tank 8, ring metal mesh 9, flat key 10, fiber film 11, hair brush 12, filter assembly 13, etc. The grid plate 2 and the filter assembly 13 are respectively placed at the air inlet end and the air outlet end of the filter. The fan 6 is installed in the fan casing 5 and has an interference fit with the box body 1 . The central shaft 4 is located at the center, and the motor 3 is coaxially arranged with the blower fan 6 , the ring metal mesh 9 and the electromagnetic clutch 7 . The electromagnetic clutch 7 is connected with the central shaft 4 using a flat key 10 . The motor 3 drives the fan 6 and the ring metal mesh 9 to rotate at the same speed, and the speed range is 500-1000r/min. An electromagnetic clutch 7 is installed between the fan 6 and the ring metal net 9, so that the brush 12 and the filter assembly 13 rub intermittently. The push-pull dust collection tank 8 is placed directly below the filter assembly 13 . A fibrous film 11 with protruding soft brushes 12 is installed on the ring metal net 9, and the brushes 12 above it are in surface contact with the filter assembly 13, and the mutual friction is excited to generate static electricity, and the static electricity is guided into the fibers to keep the fibers continuously charged state. At the same time, the brush 12 can clean the pollutants attached to the surface of the membrane, and the push-pull dust collection tank 8 can collect the dust in time to avoid secondary pollution.

The invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. The fiber filter assembly 13 was prepared by using polylactic acid as a raw material by melt electrospinning, and a partial cross-sectional schematic diagram of the filter assembly is shown in FIG. 2 . The three layers of electrospun fiber membranes are closely attached in turn, and the sealing strip 13-1 is bonded around to ensure the interference fit between the filter assembly 13 and the box body 1, so that the filter assembly is fixed at the air outlet end of the box body. Put the electret (tourmaline powder, ZnO particles or _TiO2 particles, etc.), low-density wax, a small amount of antioxidant, coupling agent and polylactic acid powder into a high-speed mixer, take it out after fully stirring, and heat it at 105 ° C Dry in an oven at constant temperature, cut into granules, prepare the first layer of electrospun fiber membrane 13-2 as spinning raw material, and use the first layer of electrospun fiber membrane 13-2 as the base cloth, and use polylactic acid as the raw material to prepare the second layer The electrospun fiber layer 13-3 and the third electrospun fiber layer 13-4 have fiber diameters of 1-3 μm and 0.2-1 μm in sequence. The thickness range of each layer of fiber membrane is 10-20 μm, the range of pore diameter is 300 nm-1 μm, and the porosity is greater than 70%.

The invention is a high-efficiency electrostatic dust removal device based on the principle of differential brush friction electrification. The schematic diagram of the frictional electrostatic dust removal process is shown in Figure 3. The friction between the brush and the filter assembly causes charge transfer to occur on the surfaces on both sides of the contact, which is positively or negatively charged. As shown in Figure 3, the polluted air on the left enters from the air inlet, and the particles pass through the electrostatic fiber membrane in turn, absorbing positively or negatively charged particles, large particles are mechanically captured, and small particles are mostly electrostatically adsorbed to the filter Components, the dust charge is neutralized with the charge of the fiber filter component, and at the same time, the brush can clean up the pollutants attached to the surface of the membrane in time, and the purified air is blown out from the air outlet on the right as shown in Figure 3.

Claims (8)

1. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle, it is characterised in that：Mainly include：Case Body, screen, motor, central shaft, Fan casing, wind turbine, electromagnetic clutch, plug-type dust collecting trough, endless metal net, flat key, fiber Film, hairbrush and filter assemblies, babinet are screen and the square box of the opposite installation of filter assemblies, and screen and filter assemblies are respectively placed in The air intake and outlet air end of babinet；In Fan casing, Fan casing is located among babinet and is interference fitted with babinet, electricity assembling Machine and wind turbine, endless metal net and electromagnetic clutch are coaxially arranged, and the central shaft of motor passes through wind turbine, endless metal net and electromagnetism Clutch；Electromagnetic clutch is connect with central shaft using flat key, and endless metal installs the tunica fibrosa with the soft hairbrush of protrusion on the net, Hairbrush and the contact of filter assemblies first layer electrospinning fibre film surface, plug-type dust collecting trough are placed in immediately below filter assemblies.

2. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 1, special Sign is：Filter assemblies are made of three layers of tunica fibrosa, a diameter of 3 ~ 5 μm of the fiber of the first electrospun fiber membrane, uniformly mix one The electret of certainty ratio, a diameter of 1 ~ 3 μm of the fiber of second layer electrospun fiber membrane, the fiber of third layer electrospun fiber membrane it is straight Diameter is 0.2 ~ 1 μm.

3. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 2, special Sign is：Each layer tunica fibrosa thickness range of three layers of tunica fibrosa is 10 ~ 20 μm.

4. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 2, special Sign is：Electret is tourmaline powder, ZnO particles or TiO₂Particle.

5. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 1, special Sign is：The first layer electrospinning fibre film surface of hairbrush and filter assemblies contacts, 30 ~ 45N of interface pressure range.

6. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 1, special Sign is：Electromagnetic clutch is installed between wind turbine and endless metal net so that hairbrush and filter assemblies interval frottage, contact frequency 35 ~ 50 beats/min of rate range.

7. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 1, special Sign is：Filter assemblies prepare material as polylactic acid.

8. a kind of high efficiency electrostatic dust-extraction unit based on differential hairbrush triboelectrification principle according to claim 1, special Sign is：The material of first layer electrospun fiber membrane includes electret, low-density wax, a small amount of antioxidant, coupling agent and poly- breast Sour powder.