CN1594999A - Combined type air purification and sterilization device - Google Patents

Abstract

A combined air purification and sterilization device is used in the field of environmental purification. The present invention includes: particulate trapping assembly, ozone-photocatalytic assembly, water mist spraying-air-water separation assembly, according to the airflow direction, the particulate trapping assembly is arranged at the front, and the ozone-photocatalytic assembly is arranged behind the particulate trapping assembly, The water mist spray-gas-water separation component is set behind the ozone-photocatalytic component. The three components are independent and parallel to each other, and are closely connected with the air duct around them. Mist Spray - Air-Water Separation Assembly. The invention combines water mist absorption technology with photocatalysis and ozone technology, uses water mist to absorb remaining organic pollutants and ozone gas, and discharges clean gas. The invention has strong ability to kill bacteria and good effect of removing organic pollutants, is especially suitable for indoor air purification of central air-conditioning system, can effectively solve the cross-infection of infectious diseases caused by the use of central air-conditioning system, and can also be used for indoor air humidification and purification device.

Description

Combined air purification and sterilization device

technical field

The invention relates to an air purification device, in particular to a combined air purification and sterilization device. It is used in the technical field of living room electrical appliances.

Background technique

Urban building syndrome, indoor air-conditioning disease, and organic pollution caused by modern living environment and interior decoration directly affect people's health and life safety. Because the central air-conditioning system cannot be cleaned and disinfected frequently, the environment pollution caused by the inside of the system becoming a breeding place for bacteria has increasingly attracted people's attention. Especially due to the use of the central air-conditioning system, the problem of cross-infection of infectious diseases has attracted much attention. Current air purifiers mainly use activated carbon adsorption technology, ozone purification technology, negative ion dust removal technology and high-voltage electrostatic technology. Activated carbon adsorption technology can only absorb and store harmful substances, but cannot decompose or remove them, but only transfer the pollution source. Ozone technology has the function of sterilization and deodorization, but the removal efficiency of organic pollutants is low, and ozone itself is harmful to human body and environment. Negative ion and high-voltage electrostatic technology is a physical process that can remove smoke and dust in the air, but it cannot remove and purify the pollution caused by chemicals, biology and microorganisms.

Photocatalysis is an emerging technology for environmental purification. Nano- _TiO2 photocatalyst can effectively oxidize or reduce harmful gas molecules adsorbed on its surface, kill bacteria, inhibit viruses, and convert harmful organic matter, bacteria, etc. into harmless substances such as water and carbon dioxide, without any secondary secondary pollution. Therefore, it has become a research hotspot for indoor air purification in recent years.

After literature search, it was found that the name of the invention patent is: a method and device for purifying indoor air, and the patent application number is: 03126563.4. This patent discloses an air purification method that combines activated carbon filtration, ultraviolet lamps and nano-TiO ₂ photocatalysis . However, due to the large gas flow rate of central air-conditioning, the primary purification rate of photocatalysis to air is often low. Although the concentration of pollutants in the air can reach the indoor air quality standard through multiple cycles, it cannot effectively solve the problem of air pollution due to the use of central air-conditioning systems. The problem of cross-infection of infectious diseases caused. At the same time, the use of activated carbon can only absorb but not remove harmful gases, which will eventually lead to secondary pollution. On the other hand, the ultraviolet light source used in photocatalysis can generate ozone, although ozone has the function of sterilization and disinfection, and can be coupled with photocatalysis to significantly improve the activity of photocatalysis. However, if it is not properly controlled, it will often pollute the environment and cause harm to human health.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a combined air purification and sterilization device with efficient removal of indoor air organic pollutants and sterilization, so that after the primary effect filter and high-voltage electrostatic capture particles and dust , under the coupling action of ozone-nano photocatalysis, it can efficiently degrade organic pollutants and sterilize bacteria, and excess ozone and residual organic pollutants can be absorbed by water mist, so that the removal rate of pollutants can be achieved in one pass. After multiple processing, it is safe and reliable.

The present invention is realized through the following technical proposals, and the present invention includes: particle trapping assembly, ozone-photocatalytic assembly, water mist spraying-air-water separation assembly. The connection relationship is as follows: according to the airflow direction, the particle capture component is set at the front, the ozone-photocatalytic component is set behind the particle capture component, and the water mist spray-gas-water separation component is set behind the ozone-photocatalytic component. Three components They are independent and parallel to each other, and are closely connected with the air duct around them. All the airflows pass through the particle capture component, the ozone-photocatalytic component and the water mist spray-air-water separation component in sequence.

The particle collection component is composed of a primary filter and a high-voltage electrostatic precipitator. These two components are parallel to each other, and the parallel plane is perpendicular to the airflow direction, and the size of the parallel plane is consistent with the internal section of the pipeline.

The ozone-photocatalytic component contains a nano-photocatalytic reaction sheet and an ultraviolet light source. The nano-photocatalytic reaction sheet can be a nano-photocatalytic mesh supported by metal foam, or a filter made of composite nano-photocatalytic particles. In order to reduce the velocity of the airflow passing through the mesh vertically, the filter is preferably wave-shaped. The ultraviolet light source is a cold cathode ultraviolet lamp or an ordinary ultraviolet lamp that can generate a certain amount of ozone. The filter screen made of composite nano-photocatalytic particles has more than two layers, and the layers are parallel to each other and perpendicular to the airflow direction; the ultraviolet lamp is located between every two layers of the filter screen made of composite nano-photocatalytic particles, and parallel to the filter.

The water mist spraying-air-water separation assembly is provided with nozzles, water mist interception nets, curved air-water separators, water storage tanks, regulating valves, water pumps or air pumps and connecting pipes. In front of the nozzle are the water mist interception net and the curved air-water separator in turn, and the water storage tank is located at the bottom of the water mist interception net and the curved air-water separator; between the water storage tank, the regulating valve, the water pump (or air pump) and the nozzle Connected with connecting pipes.

When the air enters the system, it passes through the primary filter and the high-voltage electrostatic precipitator, and after the tiny particles are removed, it enters the ozone-photocatalytic component. Under the oxidation of ozone, photocatalytic degradation, ultraviolet lamp irradiation and the synergistic effect of the three, organic pollutants and bacteria in the air are oxidatively decomposed and killed. Residual ozone gas and organic pollutants are absorbed under the action of a large amount of tiny water mist, while the water mist is intercepted by the water mist interception net and the curved air-water separator, and finally the clean air is discharged.

The present invention selects an ultraviolet (UV) lamp tube capable of generating ozone as a light source for photocatalysis. This has two effects: first, the interaction between ozone and UV, and second, the interaction between photocatalysis (such as TiO ₂ ) and ozone. Through the above synergistic effect, a large amount of OH with high oxidizing ability is produced, thereby effectively removing organic pollutants and killing bacteria. It can be briefly represented by the following chemical reaction equation:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

M in formula (9) represents the organic matter in the air. TiO ₂ forms electron-hole pairs under the irradiation of ultraviolet light. Ozone has a strong electrophilicity, which degrades the recombination probability of electrons and holes, thereby achieving the purpose of degrading organic matter. In addition, after ozone captures electrons, it combines with hydrogen ions to generate highly active hydroxyl radicals, thereby better degrading organic matter in the air.

The present invention also uses water mist spraying to form mist-like water particles ranging in size from tens of microns to hundreds of microns, which greatly increases the contact area between water and gas, so that residual ozone, organic gas, etc. are quickly absorbed by water particles. Absorption; the water mist is intercepted by the water mist interception net and the curved gas-water separator and separated from the gas. The curved air-water separator is composed of curved blades with a spacing of 10mm-100mm. Its length and number of corners can vary from 2 to 8, which are determined according to the airflow resistance and separation effect. The solubility of ozone in water is dozens of times that of air, and at the same time in the aqueous solution, ozone will continue to undergo oxidation-reduction reactions with captured organic gases to obtain further purification. While the water for water mist spraying is recycled, it should be added or replaced regularly.

Compared with the prior art, the present invention utilizes particle trapping components, ozone-photocatalytic components, and water mist spraying-air-water separation components, which can not only use ozone to assist in efficiently removing gaseous pollutants and killing bacteria, but also It can also eliminate the pollution to the environment caused by the residual ozone, so as to achieve the purpose of efficiently removing organic pollutants in the gas and killing bacteria. The inventive technology is especially suitable for the indoor air purification of the central air-conditioning system, and can effectively solve the cross-infection of infectious diseases caused by the use of the central air-conditioning system; it can also be used for indoor air humidification and purification devices.

Description of drawings

Fig. 1 structural representation of the present invention

Detailed ways

As shown in Fig. 1, the present invention includes: particle trap assembly 1, ozone-photocatalysis assembly 2, water mist spray-air-water separation assembly 3, and its connection relationship is: according to the airflow direction, particle trap assembly 1 is arranged on At the front, the ozone-photocatalytic component 2 is set behind the particulate capture component 1, and the water mist spray-gas-water separation component 3 is set behind the ozone-photocatalytic component 2. The three components are independent and parallel to each other, and are closely connected with the air duct around them. connected, all airflows pass through the particle trapping assembly 1, the ozone-photocatalytic assembly 2 and the water mist spraying-gas-water separation assembly 3 in sequence.

The particle collection assembly 1 is provided with an initial effect filter 4 and a high-voltage electrostatic precipitator 5, the two components are parallel to each other, and the parallel plane is perpendicular to the airflow direction, and the size of the parallel plane is consistent with the inner section of the pipeline.

The ozone-photocatalytic component 2 includes a nano-photocatalytic reaction sheet 6 and an ultraviolet light source 7. The nano-photocatalytic reaction sheet 6 is made of foamed metal-supported nano-photocatalyst, or a filter made of composite nano-photocatalytic particles. The filter screen is wavy; the ultraviolet light source 7 is a cold-cathode ultraviolet lamp tube or an ordinary ultraviolet lamp tube capable of generating ozone. The filter screen made of composite nano-photocatalytic particles has more than two layers, each layer is parallel to each other, the distance is 10-100cm, and perpendicular to the airflow direction; the ultraviolet lamp is located in each filter screen made of composite nano-photocatalytic particles Between the two layers, and parallel to the filter.

The water mist spray-air-water separation assembly 3 is provided with nozzles 8, water mist interception nets 9, curved air-water separators 10, water storage tanks 11, regulating valves 12, water pumps or air pumps 13, connecting pipes 14, and nozzles 8 The front of the water mist intercepting net 9 and the curved air-water separator 10 are successively, the water storage tank 11 is positioned at the bottom of the water mist intercepting net 9 and the curved air-water separator 10, the water storage tank 11, the regulating valve 12, the water pump or Connect with connecting pipe 14 between air pump 13 and nozzle 8.

When the air enters the system, it passes through the primary filter 4 and the high-voltage electrostatic precipitator 5 , and enters the ozone-photocatalytic component 2 after the tiny particles are removed. Under the oxidation of ozone, photocatalytic degradation, ultraviolet lamp irradiation and the synergistic effect of the three, organic pollutants and bacteria in the air are oxidatively decomposed and killed. Residual ozone gas and organic pollutants are absorbed under the action of a large amount of tiny water mist, and the water mist is intercepted by the water mist interception net 9 and the curved air-water separator 10 at the same time, and finally the clean air is discharged.

Claims (4)

1. A combined air purification and sterilization device comprises: particle entrapment subassembly (1), ozone-photocatalysis subassembly (2), characterized by still includes: the water mist spraying-gas-water separation component (3) is characterized in that the particle trapping component (1) is arranged at the forefront according to the direction of air flow, the ozone-photocatalysis component (2) is arranged behind the particle trapping component (1), the water mist spraying-gas-water separation component (3) is arranged behind the ozone-photocatalysis component (2), the three components are independent and parallel to each other and are closely connected with an air pipe at the periphery, and all air flow sequentially penetrates through the particle trapping component (1), the ozone-photocatalysis component (2) and the water mist spraying-gas-water separation component (3).

2. The combined air purification and sterilization device as claimed in claim 1, wherein the particle collection module (1) is provided with a primary filter screen (4) and a high-voltage electrostatic dust removal component (5), the primary filter screen and the high-voltage electrostatic dust removal component are parallel to each other, the parallel surfaces of the primary filter screen and the high-voltage electrostatic dust removal component are perpendicular to the direction of the air flow, and the size of the parallel surfaces is consistent with the inner cross section of the pipeline.

3. The combined air purifying and sterilizing device of claim 1, wherein the ozone-photocatalytic component (2) comprises a nano-photocatalytic reaction sheet (6) and an ultraviolet lamp light source (7), the nano-photocatalytic reaction sheet (6) is made of foam metal loaded nano-photocatalyst or is a filter screen made of composite nano-photocatalytic particles, the filter screen is wavy, the ultraviolet lamp light source (7) is a cold cathode ultraviolet lamp tube or a common ultraviolet lamp tube capable of generating ozone, the filter screen made of the composite nano-photocatalytic particles is more than two layers, the layers are parallel to each other, the distance is 10-100cm and is perpendicular to the air flow direction, and the ultraviolet lamp tube is positioned between each two layers of the filter screen made of the composite nano-photocatalytic particles and is parallel to the filter screen.

4. The combined air purification and sterilization device according to claim 1, wherein the water mist spray-air-water separation assembly (3) is provided with a nozzle (8), a water mist interception net (9), a crank-shaped air-water separator (10), a water storage tank (11), a regulating valve (12), a water pump or air pump (13) and a connecting pipeline (14), the water mist interception net (9) and the crank-shaped air-water separator (10) are sequentially arranged in front of the nozzle (8), the water storage tank (11) is positioned at the bottoms of the water mist interception net (9) and the crank-shaped air-water separator (10), and the water storage tank (11), the regulating valve (12), the water pump or air pump (13) and the nozzle (8) are connected through the connecting pipeline (14).