WO2023219524A1 - Apparatus for air purification using high-temperature processing - Google Patents

Apparatus for air purification using high-temperature processing Download PDF

Info

Publication number
WO2023219524A1
WO2023219524A1 PCT/RO2023/000002 RO2023000002W WO2023219524A1 WO 2023219524 A1 WO2023219524 A1 WO 2023219524A1 RO 2023000002 W RO2023000002 W RO 2023000002W WO 2023219524 A1 WO2023219524 A1 WO 2023219524A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
heat
thermal
air purification
thermal reactor
Prior art date
Application number
PCT/RO2023/000002
Other languages
French (fr)
Inventor
Radu Radu
Cazemir-Benedict Ionescu
Original Assignee
Radu Radu
Ionescu Cazemir Benedict
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Radu Radu, Ionescu Cazemir Benedict filed Critical Radu Radu
Publication of WO2023219524A1 publication Critical patent/WO2023219524A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/343—Heat recovery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/91—Bacteria; Microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/93—Toxic compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/65—Employing advanced heat integration, e.g. Pinch technology
    • B01D2259/655—Employing advanced heat integration, e.g. Pinch technology using heat storage materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages

Definitions

  • Air purification, contaminated with dangerous biological components or toxic substances, by treatment at high temperatures, is known in the literature [1, 2, ... 8 ].
  • All these devices consist mainly of an air heating module at a temperature between 200-300 degrees Celsius and a countercurrent heat exchanger used for cooling the treated air and recovering the heat. The recovered heat is used to preheat the air to be treated.
  • This type of breathing apparatus is superior to devices that filter pathogens and toxic substances using the passage of air through filter materials. During operation, however, the pores of the filter materials become clogged with pathogens and filtered toxic substances, which leads, in a relatively short time, to the loss of purifying capacities and the need to replace them. Following their use, infected consumables are generated that require controlled destruction.
  • Appliances based on thermal air purification have longer service times which are determined only by the capacity of the electricity sources. They do not generate infected consumables.
  • this type of device still retains some drawbacks. These are related to the mass and the excessive volume of the heater and heat exchanger and the high consumption of electricity. To these inconveniences are added the complicated workmanship of making the apparatus and the high consumption of platinum or palladium used in making the thermooxidation catalyst.
  • the device we propose comes with new solutions for the construction of the thermal-heating reactor (1) and replaces the countercurrent heat exchanger with two regenerative heat recuperators (2) that solve the problems listed above.
  • the heater was built of several sheets of sheet spaced apart and superimposed in a package.
  • the package was pierced by metal tubes in which electrical resistors were mounted. Heat was transferred by direct conduction from the electrical heater to the sheet metal sheets and then to the air.
  • the realization was difficult and involved a large volume and mass of the heater .
  • Figure 1 represents a cross section of the apparatus, in the area of the thermal reactor.
  • Figure 2 is a longitudinal section of the apparatus.
  • the solution proposed for the construction of the thermal reactor (1) uses a nonwoven blanket of stainless steel wire (3) (steel wool) with a wire diameter between 25-100 ⁇ m.
  • the wires are heated by an electrical resistor (4) wound on a ceramic plate (5) placed between the layers of wires. Due to the fineness of the wires, the heat exchange surface between the wires and the air is very large, the heating of the air being done instantly and evenly. This reduces the time required for the air to stay in the thermal reactor (1) resulting in a reduction in the volume and mass of the reactor (1).
  • the reactor channel (6) is dug into a block of ceramic fibers (7).
  • the walls of the channel (6) are lined with aluminum foil (8).
  • Aluminum is the material that has maximum infrared reflectivity.
  • the blanket of stainless steel wires (3) (steel wool) is heated by the electrical resistance (4) by radiation in the infrared spectrum.
  • the phenomenon of radiation transfer is intensified by the reflection of radiation on the aluminum surfaces (8) that line the walls of the channel (6) of the thermal reactor (1).
  • the thermal transfer between the electrical resistance (4) and the stainless steel wires (3) is reduced in weight due to the small contact surface between the resistance and the wires due to the small diameter of the wires.
  • Heating by the Joule effect would form overheated points at the contact of the stainless steel wire - supply electrode which could lead to the ignition of the stainless steel wire blanket (3). Due to the fineness of the wires, the steel wire blanket (3) would ignite in the air at over 550 degrees Celsius. Due to this, Joule heating cannot be used in the construction of the thermal reactor (1) .
  • thermooxidation catalyst Another advantage brought by the use of steel wool (3) is the possibility of using it as a support for the thermooxidation catalyst.
  • the stainless steel wires are subjected to an anodizing process [9] [10] with the aim of producing a surface roughness, with the formation of nanopores of 50-150 nm.
  • the TiO 2 catalystdoped with various metal oxides is deposited in these pores .
  • FIG. 1 shows a cross section through the thermal reactor (1).
  • the channel (6) dug into the ceramic fiber body (7) is filled with a blanket of stainless steel wires (3) placed on either side of the electrical resistance (4) wound on the ceramic plate (5) .
  • the walls of the channel (6) are plated with aluminum foil (8) which ensures the reflection of IR radiation back on the stainless steel wires (3). Constructed in this way, the thermal reactor (1) ensures both air heating and catalytic thermal oxidation .
  • the heat is taken from the heating element (4) by means of steel wool threads (3) and aluminum reflective foil (8) .
  • the air After passing through the reactor (1) and the catalytic thermooxidation of pathogens and toxic substances, the air passes through the regenerator (2) no. 2, mounted at the other end of the channel (6). The air gives off the heat of the regenerator elements (9) and when it cools it enters the respiratory system.
  • regenerator (2) no. 2 preheats and enters the heat reactor (1).
  • regenerator (2) no. 1 it is also thermally sterilized by regenerator (2) no. 1, after the release of heat is released into the atmosphere .
  • the regenerator (2) is constructed of a cylinder of ceramic fibers (10) having longitudinally inside a cylindrical channel (11) in which are placed the elements of the regenerator (9) , which constitute the thermal mass.
  • the thermal conductivity in the direction perpendicular to the direction of air passage should also be low due to the reduction of heat losses ;
  • the thermal capacity of the regenerator elements (9) must be greater than or equal to the sensitive heat given / received by the 0.5 liters of air, when passing through the regenerator during the 5 seconds.
  • the regenerator (2) consists of overlapping discs, loaded into the cylinder channel (11) .
  • the discs are made by rolling an aluminum foil of 0.03- 0.01 mm, 5-10mm wide, transversely corrugated, with 1mm the height between the corrugated tips.
  • a rare fiberglass fabric was included between the layers of corrugated aluminum foil, acting as a spacer. This ensures both the preservation of the opening of the channels formed by corrugation and a decrease in thermal conductivity in the direction perpendicular to the longitudinal direction of air passage.
  • FIG. 2 shows a longitudinal section of the air purifier.
  • the thermal reactor (1) is flanked on one side and on the other by the two regenerators (2). Each regenerator has 5 regenerating elements inside (9).
  • the thermal reactor (1) and the regenerators (2) are mounted in a sheet metal cylinder (12) which mechanically protects them.
  • a sheet metal cover (13) is provided with a nozzle (14) to which the flexible hose (15) which connects to the face mask is fixed.
  • a jack is mounted on the cover (13) which connects to the power supply.
  • Two conductors (16) make the electrical connection between the resistor (4) and the jack.
  • This battery uses Li-Ion batteries and is equipped by the manufacturer with a circuit that stabilizes the voltage supplied to 5V throughout the operation of the device.
  • the capacity of this battery can be chosen between 10,000-20,000 mA / hour, ensuring an uninterrupted operation of 3-6 hours.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The presented device is intended for air purification by heat treatment. Air purification in this case comprises both the sterilization of pathogens such as viruses, microbes, bacteria, spores, by thermal shock, and the deactivation of toxic substances by catalytic thermal oxidation. The apparatus consists of thermal reactor (1) mounted between two heat recuperators (2). The thermal reactor (1) is made by original construction method and can provide heat treatment of the infected air between 250-450 degrees Celsius, sufficient temperature for both thermal sterilization and thermocatalytic oxidation. Regenerators (2) are used to cool the treated air for inspiration and heat recovery to preheat the air to be heat treated.

Description

Apparatus for air purification using high- temperature processing
Description
Air purification, contaminated with dangerous biological components or toxic substances, by treatment at high temperatures, is known in the literature [1, 2, ... 8 ].
All these devices consist mainly of an air heating module at a temperature between 200-300 degrees Celsius and a countercurrent heat exchanger used for cooling the treated air and recovering the heat. The recovered heat is used to preheat the air to be treated. This type of breathing apparatus is superior to devices that filter pathogens and toxic substances using the passage of air through filter materials. During operation, however, the pores of the filter materials become clogged with pathogens and filtered toxic substances, which leads, in a relatively short time, to the loss of purifying capacities and the need to replace them. Following their use, infected consumables are generated that require controlled destruction.
Appliances based on thermal air purification have longer service times which are determined only by the capacity of the electricity sources. They do not generate infected consumables.
Despite the obvious advantages, this type of device still retains some drawbacks. These are related to the mass and the excessive volume of the heater and heat exchanger and the high consumption of electricity. To these inconveniences are added the complicated workmanship of making the apparatus and the high consumption of platinum or palladium used in making the thermooxidation catalyst.
The device we propose comes with new solutions for the construction of the thermal-heating reactor (1) and replaces the countercurrent heat exchanger with two regenerative heat recuperators (2) that solve the problems listed above.
In the variants presented in the literature, the heater was built of several sheets of sheet spaced apart and superimposed in a package. The package was pierced by metal tubes in which electrical resistors were mounted. Heat was transferred by direct conduction from the electrical heater to the sheet metal sheets and then to the air. The realization was difficult and involved a large volume and mass of the heater .
The construction of the proposed air purification apparatus is shown in fig. 1 and FIG. 2. Figure 1 represents a cross section of the apparatus, in the area of the thermal reactor. Figure 2 is a longitudinal section of the apparatus.
The solution proposed for the construction of the thermal reactor (1), shown in fig. 1, uses a nonwoven blanket of stainless steel wire (3) (steel wool) with a wire diameter between 25-100μm. The wires are heated by an electrical resistor (4) wound on a ceramic plate (5) placed between the layers of wires. Due to the fineness of the wires, the heat exchange surface between the wires and the air is very large, the heating of the air being done instantly and evenly. This reduces the time required for the air to stay in the thermal reactor (1) resulting in a reduction in the volume and mass of the reactor (1). The reactor channel (6) is dug into a block of ceramic fibers (7). The walls of the channel (6) are lined with aluminum foil (8). Aluminum is the material that has maximum infrared reflectivity. The blanket of stainless steel wires (3) (steel wool) is heated by the electrical resistance (4) by radiation in the infrared spectrum. The phenomenon of radiation transfer is intensified by the reflection of radiation on the aluminum surfaces (8) that line the walls of the channel (6) of the thermal reactor (1). The thermal transfer between the electrical resistance (4) and the stainless steel wires (3) is reduced in weight due to the small contact surface between the resistance and the wires due to the small diameter of the wires. This proposed technical solution is the only one that can ensure a uniform heating of the steel wire blanket (3) .
Heating by the Joule effect would form overheated points at the contact of the stainless steel wire - supply electrode which could lead to the ignition of the stainless steel wire blanket (3). Due to the fineness of the wires, the steel wire blanket (3) would ignite in the air at over 550 degrees Celsius. Due to this, Joule heating cannot be used in the construction of the thermal reactor (1) .
Another heating solution, that of electromagnetic induction currents, cannot be used due to the small diameter of the wires. The development of Eddy currents requires significant thicknesses of the material to form.
The solution found and proposed is the only one that allows the use of stainless steel wires (3) (steel wool) in the construction of the thermal reactor (1) .
Another advantage brought by the use of steel wool (3) is the possibility of using it as a support for the thermooxidation catalyst. In order to be used as a support for the thermooxidation catalyst, the stainless steel wires are subjected to an anodizing process [9] [10] with the aim of producing a surface roughness, with the formation of nanopores of 50-150 nm. The TiO 2 catalystdoped with various metal oxides is deposited in these pores .
In figure no. 1 shows a cross section through the thermal reactor (1). The channel (6) dug into the ceramic fiber body (7) is filled with a blanket of stainless steel wires (3) placed on either side of the electrical resistance (4) wound on the ceramic plate (5) . The walls of the channel (6) are plated with aluminum foil (8) which ensures the reflection of IR radiation back on the stainless steel wires (3). Constructed in this way, the thermal reactor (1) ensures both air heating and catalytic thermal oxidation .
Another novelty proposed in this new type of air purifier is the replacement of the countercurrent heat exchanger with two recuperators-regenerators (2).
The construction of a countercurrent plate heat exchanger, which ensures the non-mixing of the air passing through the two routes, becomes difficult when working with temperatures higher than 250-300 degrees Celsius. No adhesives or putties are known to ensure sealing and to remain elastic in the range of temperatures between 350-500 degrees Celsius.
The solution came, as shown in FIG. 2. Longitudinal section through the air purification device, by replacing the countercurrent exchanger, with two recuperators-regenerators (2). Their simpler construction eliminates the need to use adhesives. In the construction of regenerative recuperators, we started from the particularity of the air flow that had to be purified. Breathing is done in two stages: inspiration and expiration. Each lasts about 5 seconds and involves moving a volume of 0.5 liters of air. During inspiration, 0.5 liters of infected air passes through the regenerator (2) no. 1, is preheated to a temperature close to that in the channel (6) of the thermal reactor (1), enters it and heats up to 350-500 degrees Celsius. The heat is taken from the heating element (4) by means of steel wool threads (3) and aluminum reflective foil (8) . After passing through the reactor (1) and the catalytic thermooxidation of pathogens and toxic substances, the air passes through the regenerator (2) no. 2, mounted at the other end of the channel (6). The air gives off the heat of the regenerator elements (9) and when it cools it enters the respiratory system.
During the period of 5 seconds corresponding to the expiration, the 0.5 liters of air cross in the opposite direction the regenerator (2) no. 2, preheats and enters the heat reactor (1). Here it is also thermally sterilized by regenerator (2) no. 1, after the release of heat is released into the atmosphere .
This type of operation ensures the sterilization of both inhaled and exhaled air. For this reason it is especially recommended for use in the medical environment where it protects both the carrier and the patient.
The regenerator (2) is constructed of a cylinder of ceramic fibers (10) having longitudinally inside a cylindrical channel (11) in which are placed the elements of the regenerator (9) , which constitute the thermal mass.
When designing the regenerator (2) we started from the need to comply with several requirements :
- To withstand working temperature, up to 350-450 degrees Celsius;
- Have a sufficient transfer surface to ensure cooling of the air from the treatment temperature to the ambient temperature over a passage length of only 5-7cm;
- To have a high permeability when the air passes on the crossing direction; - The thermal conductivity in the direction of air passage should be low to reduce heat loss;
- The thermal conductivity in the direction perpendicular to the direction of air passage should also be low due to the reduction of heat losses ;
- The thermal capacity of the regenerator elements (9) must be greater than or equal to the sensitive heat given / received by the 0.5 liters of air, when passing through the regenerator during the 5 seconds.
In order to meet all these requirements at the same time, a solution was chosen in the construction of the regenerator, which we will present below.
The regenerator (2) consists of overlapping discs, loaded into the cylinder channel (11) . The discs are made by rolling an aluminum foil of 0.03- 0.01 mm, 5-10mm wide, transversely corrugated, with 1mm the height between the corrugated tips. A rare fiberglass fabric was included between the layers of corrugated aluminum foil, acting as a spacer. This ensures both the preservation of the opening of the channels formed by corrugation and a decrease in thermal conductivity in the direction perpendicular to the longitudinal direction of air passage.
The division of the thermal mass of the generator (2) into several superimposed discs was made to increase the resistance to heat transfer in the direction of air flow, having the effect of reducing heat loss and increasing the efficiency of the regenerator (2).
In figure no. 2 shows a longitudinal section of the air purifier. The thermal reactor (1) is flanked on one side and on the other by the two regenerators (2). Each regenerator has 5 regenerating elements inside (9). The thermal reactor (1) and the regenerators (2) are mounted in a sheet metal cylinder (12) which mechanically protects them. At the top, a sheet metal cover (13) is provided with a nozzle (14) to which the flexible hose (15) which connects to the face mask is fixed. A jack is mounted on the cover (13) which connects to the power supply. Two conductors (16) make the electrical connection between the resistor (4) and the jack.
To simplify the device, it was decided to use a battery used to recharge mobile phones as a power source. This battery uses Li-Ion batteries and is equipped by the manufacturer with a circuit that stabilizes the voltage supplied to 5V throughout the operation of the device. The capacity of this battery can be chosen between 10,000-20,000 mA / hour, ensuring an uninterrupted operation of 3-6 hours.
Bibliography
[ 1 ] Inactivation of Aerosolized Viruses in
Continuous Air Flow with Axial Heating , Sergey A. Grinshpun , Atin Adhikari , Chunlei Li, Michael Yermacov , Lauri Reponen , Elisabet Johansson, Mikhaylo Trunova
[2] US 6488900B1
[3] KR 101332199
[4] KR 101783707B1
[5] EP 2545981A4
[6] KR 20110102765
[7] US 2013004376
[8] WO 2011112031
[9] On-step Hydrothermal Preparation of TiO 2 / WO 3 Nanocomposite film on anodized stainless steel for catalytic degradation of organic pollutants , WT Zhan, HW Ni, RS Chen, ZY Wang, YW Li, JH Li
[10] Production and Properties of the Pollous Layer Obtained by the Electrochemical Method on the Surface of Austenitic Steel , Agnieszka Ossowska , Jacek Ryl , Tomasz Sternicki

Claims

Claims It is claimed:
(1) A device for air purification by means of deactivating biological pathogens and by thermocatalytical oxidation of toxic substances, consisting of a thermal reactor (1) witch heated air at 350-450 degrees Celsius and two recuperators- regenerators (2) wich flankes on one side and on the other thermal reactor, for heat recovery from treated air, and use heat for preheated air to a themperature close to treatment temperature.
(2) An air purification device, according to claim (1), characterized by the use of a thermal reactor (1) to heat the air, which uses a blanket of thin stainless steel wires (3) (steel wool) to ensure a large surface of heat transfer to the air to be treated. This way, a rapid and uniform heating of the air is achieved. The steel wool (3) receives heat from an electrical resistance (4) through a mechanism that is relatively intensified by the presence of an aluminum reflective mirror;
(3) A device intended for air purification, according to claims (1), (2), whose thermal reactor (1) also fulfills the thermocatalytical oxidation function by means of the catalyst deposited on the steel wool
(3). In order to deposit the catalyst, the surface of the stainless steel wires is (3) roughened by anodizing;
(4) An air purificator device acording to claims (1), (2) , (3), which use for heat recovery from air treated at 350-450 degrees Celsius, an recuperatorregenerator built from 0,3-0,1 mm corrugated aluminum sheets, wich ensures a simple and safe construction compared to the contracurrent heat exchanger ;
(5) An air purification device, according to claims (1), (2), (3), (4), which divides the thermal mass of the regenerators (2) into disks, no thicker than 10 mm, obtained by spirally rolling the an aluminum strip of 0.1-0. 3 mm, corrugated at 1 mm distance between the tips. The division of the thermal mass into several disks aims to increase the resistance to heat conduction in the direction of air flow. This leads to an increase in the efficiency of the regenerator .
PCT/RO2023/000002 2022-05-09 2023-04-13 Apparatus for air purification using high-temperature processing WO2023219524A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ROA202200243A RO137751A1 (en) 2022-05-09 2022-05-09 Air purification apparatus
ROA202200243 2022-05-09

Publications (1)

Publication Number Publication Date
WO2023219524A1 true WO2023219524A1 (en) 2023-11-16

Family

ID=86383106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RO2023/000002 WO2023219524A1 (en) 2022-05-09 2023-04-13 Apparatus for air purification using high-temperature processing

Country Status (2)

Country Link
RO (1) RO137751A1 (en)
WO (1) WO2023219524A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183963A (en) * 1963-01-31 1965-05-18 Gen Motors Corp Matrix for regenerative heat exchangers
US3713281A (en) * 1971-11-02 1973-01-30 G Asker Heat and moisture exchange packing
US20140212349A1 (en) * 2013-01-29 2014-07-31 Chemisch Thermische Prozesstechnik Gmbh Process and device for the purification of waste gases
RU2617514C1 (en) * 2015-12-14 2017-04-25 Олег Савельевич Кочетов Rotary heat exchanger
CN206724409U (en) * 2017-04-13 2017-12-08 江苏洛雷人工环境技术有限公司 A kind of ceiling mounting type frost-free type New-air purifying system of the micro- electrostatic precipitation of band
US20220047758A1 (en) * 2020-08-17 2022-02-17 Cazemir-Benedict Ionescu Portable Air Sterilizer for Respirators Used in Infectious Environments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183963A (en) * 1963-01-31 1965-05-18 Gen Motors Corp Matrix for regenerative heat exchangers
US3713281A (en) * 1971-11-02 1973-01-30 G Asker Heat and moisture exchange packing
US20140212349A1 (en) * 2013-01-29 2014-07-31 Chemisch Thermische Prozesstechnik Gmbh Process and device for the purification of waste gases
RU2617514C1 (en) * 2015-12-14 2017-04-25 Олег Савельевич Кочетов Rotary heat exchanger
CN206724409U (en) * 2017-04-13 2017-12-08 江苏洛雷人工环境技术有限公司 A kind of ceiling mounting type frost-free type New-air purifying system of the micro- electrostatic precipitation of band
US20220047758A1 (en) * 2020-08-17 2022-02-17 Cazemir-Benedict Ionescu Portable Air Sterilizer for Respirators Used in Infectious Environments

Also Published As

Publication number Publication date
RO137751A1 (en) 2023-11-29

Similar Documents

Publication Publication Date Title
JP4023514B1 (en) Particulate matter removal equipment
US9968809B2 (en) Portable air purifier
CN102844537A (en) Electrically-heated catalytic converter
JP2022019530A (en) Mask having disinfecting function
CN112158823B (en) Method for preparing porous carbon gel material by using waste mask
WO2023219524A1 (en) Apparatus for air purification using high-temperature processing
CN111228674A (en) Face mask for filtering type heating mask and using method thereof
CN107178821B (en) Device for heating, disinfecting and reducing PM2.5 by using off-peak electricity for energy storage
JPS62201648A (en) Catalyst for decomposing ozone
JP2018076825A (en) Exhaust emission control device
JP2023539580A (en) Portable air sterilizer for respiratory equipment used in infectious environments
SE535047C2 (en) Apparatus and its use to treat gas
JP6118760B2 (en) PM removal air purifier
WO2003092748A1 (en) Apparatus and process for decontaminating breathing air of toxic substances and pathogenic organisms
CN111359114A (en) Shoulder-back type respirator for preventing and treating infectious virus pneumonia
CN213487038U (en) Sterilizing mask
CN212700129U (en) Infectious disease patient respiratory discharge pathogen collecting, inactivating and auxiliary breathing equipment
CN105597517B (en) Remove device and its application of smog smoke
CN213029821U (en) Mask with air disinfection device
JP2022019529A (en) Mask having disinfecting function
CN111567953A (en) Medical mask with physical sterilization and virus killing functions
JP2789871B2 (en) Catalyst purification device
JP2008188522A (en) Oil mist removal apparatus
CN214550704U (en) Portable breathing protective equipment with instant high-temperature disinfection function
JP4547072B2 (en) Air purification device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23724049

Country of ref document: EP

Kind code of ref document: A1