CN108317602B - Cascaded annular cylinder discharge and catalysis combined air purification system - Google Patents
Cascaded annular cylinder discharge and catalysis combined air purification system Download PDFInfo
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- CN108317602B CN108317602B CN201810055642.XA CN201810055642A CN108317602B CN 108317602 B CN108317602 B CN 108317602B CN 201810055642 A CN201810055642 A CN 201810055642A CN 108317602 B CN108317602 B CN 108317602B
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- 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
- F24F8/15—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 chemical means
- F24F8/167—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 chemical means using catalytic reactions
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- 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
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Abstract
The invention discloses a cascade type annular tube discharging and catalyzing combined air purifying system, which comprises a purifier body and a fan, wherein the purifier body comprises a multi-stage discharging and catalyzing combined unit, a first gas detecting unit, a second gas detecting unit, a PDM power supply and a data collecting and controlling unit; the method has the characteristics of automatic detection, high treatment efficiency, low energy consumption, wide treatment range, no secondary pollution and low cost.
Description
Technical Field
The invention belongs to the field of air purification, and particularly relates to a cascaded annular cylinder discharge and catalysis combined air purification system.
Background
The air pollution problem is increasingly sharp, and how to solve the air pollution problem is of great concern. In recent years, PM2.5 (particulate matter with the aerodynamic equivalent diameter of less than or equal to 2.5 μm in ambient air) is classified as a primary carcinogen, the emission of industrial smoke (dust) in China exceeds 1278.1 million tons every year (the emission of coal-fired smoke (dust) reaches 100 hundred million tons), and about 10 million people live in the environment with the exceeding total suspended particulate matter in China at present. Reducing air pollution can save millions of lives, can also reduce huge economic loss, and solves the problem of air pollution.
At present, the air purification technology mainly comprises a filtration technology, an ozone technology, an ultraviolet technology, a negative ion technology, an optical media catalytic technology and the like. A large number of researches show that organic pollutants, peculiar smell, fine particles and the like cannot be removed by the ultraviolet technology; the filtering technology cannot remove fine particles, the efficiency is low, the filter screen needs to be replaced periodically, and the cost is overlarge; the electrostatic dust removal technology has high energy consumption, and the generated solid waste is difficult to clean; the ozone concentration generated by the ozone technology is too high, which threatens the health of human body. In summary, these techniques have various disadvantages in terms of the kind of contaminant removal, cost, efficiency, and no secondary pollution.
Patent CN105170327A discloses a corona discharge air cleaning device, which is driven by a high voltage power supply, discharges in the area between the needle plate electrodes, and treats the by-products by photocatalysis. However, toxic gases are not adsorbed on the basis of treatment. Patent CN105920985A discloses a device for treating waste gas by dielectric barrier discharge plasma, which is driven by a high-voltage power supply, and the discharge electrode is in a wire-cylinder type. However, the structure is limited, the purification efficiency is not high, and the toxic components in the toxic gas are not adsorbed and treated.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides the cascade type ring-tube discharge and catalysis combined air purification system which utilizes the dielectric barrier discharge reactor to treat the toxic gas and utilizes the chemical catalyst to catalyze and adsorb the byproducts, and has the advantages of high treatment efficiency, low energy consumption, wide treatment range, no secondary pollution and low cost.
The technical problem to be solved by the invention is realized by the following technical scheme:
a cascaded ring-tube discharge and catalysis combined air purification system comprises a purifier body and a fan, wherein an air inlet and an air outlet are formed in the purifier body, the fan is installed in the purifier body, the purifier body comprises a multi-stage discharge and catalysis combination unit, a first gas detection unit, a second gas detection unit, a PDM power supply and a data acquisition and control unit, the gas input end of the first gas detection unit is connected with the air inlet, the gas input end of the multi-stage discharge and catalysis combination unit is connected with the gas output end of the first gas detection unit, the gas output end of the multi-stage discharge and catalysis combination unit is connected with the gas input end of the second gas detection unit, the gas output end of the second gas detection unit is connected with the air outlet, and the output end of the PDM power supply is connected with the input end of the multi-stage discharge and catalysis combination unit, the output end of the first gas detection unit, the output end of the second gas detection unit and the input end of the data acquisition and control unit are connected, the output end of the data acquisition and control unit is connected with the gas inlet, and the PDM power supply is bidirectionally connected with the data acquisition and control unit; the multi-stage discharge and catalysis combined unit comprises a medium tube, a conductive metal rod, a plurality of pairs of high-voltage electrodes, a plurality of pairs of low-voltage electrodes and a plurality of catalysis structures, wherein the high-voltage electrodes are arranged in the medium tube, the low-voltage electrodes are arranged on the outer surface of the medium tube, each pair of high-voltage electrodes and low-voltage electrodes are aligned along the radial direction of the medium tube, all the high-voltage electrodes are arranged in an equidistant axial mode and fixed by the conductive metal rod after penetrating through the center, the conductive metal rod is fixed on the position of the central axis of the medium tube, and the catalysis structures are arranged between.
As a further improved technical scheme, the purifier body further comprises a power supply voltage acquisition unit and a discharge current acquisition unit, two ends of the power supply voltage acquisition unit are respectively connected with the input end of the multi-stage discharge and catalysis combination unit and the input end of the data acquisition and control unit, and two ends of the discharge current acquisition unit are respectively connected with the output end of the multi-stage discharge and catalysis combination unit and the input end of the data acquisition and control unit.
As a further improved technical scheme of the invention, the high-voltage electrode comprises an electrode framework and metal rings, the metal rings are respectively attached to the side surfaces of the electrode framework, the conductive metal rods are fixed in the dielectric tube through ventilation frameworks arranged at the two ends of the dielectric tube, a plurality of ventilation holes are formed in the ventilation frameworks, a plurality of conductive metal bridges are further fixedly arranged on the electrode framework, one ends of the conductive metal bridges are connected with the conductive metal rods, the other ends of the conductive metal bridges are connected with the metal rings, the low-voltage electrode is a metal foil ring, a floating electrode ring is further arranged between every two adjacent metal foil rings, and the floating electrode rings are arranged in parallel with the metal foil rings.
As a further improved technical scheme of the invention, a single catalytic structure comprises two sieve plates and a catalyst, the catalyst is uniformly dispersed between the two sieve plates, a metal rod through hole for a conductive metal rod to pass through is arranged in the center of the sieve plate, and a plurality of ventilation sieve holes are arranged on the surface of the sieve plate.
As a further improved technical solution of the present invention, a first formaldehyde sensor is disposed in the first gas detection unit, and a second formaldehyde sensor is disposed in the second gas detection unit.
As a further improved technical scheme of the invention, the data acquisition and control unit comprises an MCU, a switch button, a display unit and an MCU power supply, the switch button is arranged on a panel of the MCU, the display unit and the MCU power supply are both connected with the MCU, the MCU is provided with a first gas detection unit AD end, a second gas detection unit AD end, a supply voltage acquisition unit AD end, a discharge current acquisition unit AD end, a PDM power supply control unit AD end and a fan control unit AD end, the first gas detection unit AD end is connected with the output end of the first gas detection unit, the second gas detection unit AD end is connected with the output end of the second gas detection unit, the supply voltage acquisition unit AD end is connected with the output end of the supply voltage acquisition unit, the discharge current acquisition unit AD end is connected with the output end of the discharge current acquisition unit, the PDM power supply control unit AD end is connected with the PDM power supply, and the AD end of the fan control unit is connected with the fan.
As a further improved technical scheme of the invention, the medium tube is made of polytetrafluoroethylene, high-density polypropylene, ceramic or quartz.
As a further improvement of the invention, the catalyst is in the form of particles.
As a further improved technical scheme of the invention, the data acquisition and control unit comprises an MCU, a switch button, a display unit and an MCU power supply, the switch button is arranged on a panel of the MCU, the display unit and the MCU power supply are both connected with the MCU, the MCU is provided with a first formaldehyde sensor AD end, a second formaldehyde sensor AD end, a supply voltage acquisition unit AD end, a discharge current acquisition unit AD end, a PDM power supply control unit AD end and a fan control unit AD end, the first formaldehyde sensor AD end is connected with the output end of the first formaldehyde sensor, the second formaldehyde sensor AD end is connected with the output end of the second formaldehyde sensor, the supply voltage acquisition unit AD end is connected with the output end of the supply voltage acquisition unit, the discharge current acquisition unit AD end is connected with the output end of the discharge current acquisition unit, the PDM power supply control unit AD end is connected with the PDM power supply, and the AD end of the fan control unit is connected with the fan.
As a further improvement of the invention, the catalyst is a composition of Pd or Pt attached to oxides of Mn, Co, Ni and Ag.
The catalytic structure is mainly characterized in that the catalyst is made into particles and uniformly distributed in a container, so as to ensure that byproducts are sufficiently catalyzed and adsorbed. The invention utilizes noble metal to adhere to transition metal oxide catalyst to decompose and adsorb NOXAnd O3The ozone degradation catalyst may use an oxide of a noble metal such as Pd or Pt, or a transition metal such as Mn, Co, Ni and Ag. Decomposition of O3The main principle of (A) is to mix O3Conversion to O2. As the ozone gas flows through the MnO2, the ozone molecules are bound to the MnO by inserting O atoms into the oxygen vacancies2A surface. The oxygen vacancies are 2-electrons and transfer the 2-electrons to the O atom of the ozone, thereby forming oxygen species (O) in the oxygen vacancies2-) and desorbing the oxygen-based molecules in air. Then, another ozone molecule is reacted with O2Reaction to form gas-phase oxygen molecules and bridging O2Dimer (peroxide O)22-) as observed by in situ raman spectroscopy. Finally, a peroxide (O)22-) decomposes to release one oxygen molecule, so that oxygen vacancies are recovered, which can participate in the next cycle to decompose ozone. Decomposition of NO2The main principle of (1) is in the transition metal oxide such as MnOXO on catalyst3Decomposing by passing from Mnn + to O3Electron transfer of (2) occurs. This will result in O3Decompose into oxygen molecules andatomic oxygen O. Then, unstable O22–Mn(n+2)+ complexes by reduction of oxidised manganese to Mn2+ and desorb oxygen molecules and decompose. Manganese oxide catalyst in O3Active atomic oxygen O is formed during decomposition. Similar decomposition mechanisms are also possible for other metal oxides (e.g., FeO) or noble metals (e.g., Pd). In addition, NO2Can be replaced by O and O3By oxidation to NO3. And NO3Is easy to disappear and is converted into solid N2O5。
The reaction system formed by gas reactant and solid catalyst is called gas-solid heterogeneous catalytic reaction, and its catalytic process generally includes 5 steps: (I) ozone and NOXThe molecules diffuse to the catalyst surface; (II) ozone and NOXMolecules are adsorbed on the surface of the catalyst; (III) ozone and NOXIntermediate reactions of molecules (surface reactions) produce O and O2And N2O5(ii) a (IV) desorption of the generated gas from the catalyst surface; (V) the gas produced diffuses away from the catalyst surface.
The main equations are as follows:
4Mn4++O2-→4Mn4++2e+1/2O2→2Mn4++2Mn3++1/2O2
O3→O2+O*
NO+O*→NO2
NO2+O3*→NO+2O2
HNO2+OH*→NO2+H2O
NO2+O*→NO3
N2O5can be completely decomposed at 47 ℃. Therefore, when the catalyst is saturated, the catalyst is heated, and the volatilized gas is introduced into the NaOH solution, so that the catalyst can be reused. After the degradation and adsorption of the catalytic unit, the device can discharge clean gas into the air.
The invention has the beneficial effects that:
(1) the invention fills catalyst in the discharge electrode space, uses the mechanical strength of the fan to absorb the polluted air containing particulate matter and toxic substances indoors and outdoors, firstly filters the absorbed air, and then adopts the medium to block the discharge unit to process the small particulate matter and volatile toxic substances; aiming at products O3 and NOX generated by a discharge unit, noble metal is attached to a transition metal oxide for catalytic adsorption treatment; meanwhile, a specially designed exhaust fan is arranged at the outlet to exhaust clean air to the outside; the whole system filters and purifies the air sent into the room while supplying air by mechanical strength.
(2) Compared with the prior art, the invention has the advantages of high treatment efficiency, low energy consumption, wide treatment range, no secondary pollution, low cost and the like.
(3) The invention can efficiently and quickly treat polluted air, such as haze and the like, improve the atmospheric quality, control air pollution caused by factory waste gas and the like, and reduce the morbidity of diseases such as respiratory tract and the like.
Drawings
FIG. 1 is a framework diagram of the present invention;
FIG. 2 is a frame diagram of embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of the mechanism of the combined multi-stage discharge and catalysis unit according to the present invention;
FIG. 4 is a schematic cross-sectional view of a high voltage electrode according to the present invention;
FIG. 5 is a schematic structural diagram of a data acquisition and control unit according to embodiment 2 of the present invention;
FIG. 6 is a schematic structural view of a catalytic structure in the present invention;
description of reference numerals: 1. an air inlet; 2. an air outlet; 3. a multi-stage discharge and catalysis combined unit; 5. a PDM power supply; 61. a first gas detection unit; 611. a first formaldehyde sensor; 62. a second gas detection unit; 621. a second formaldehyde sensor; 7. a data acquisition and control unit; 8. a medium pipe; 9. a conductive metal rod; 12. a catalytic structure; 13. a power supply voltage acquisition unit; 14. a discharge current collecting unit; 15. an electrode skeleton; 16. a metal ring; 17. a metal foil ring; 18. a floating electrode ring; 19. a sieve plate; 20. a catalyst; 21. a metal rod through hole; 22. ventilating sieve pores; 23. a conductive metal bridge; 24. and (4) ventilating frameworks.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, a cascaded air purification system combining annular tube discharge and catalysis, which comprises a purifier body and a fan, wherein the purifier body is provided with an air inlet 1 and an air outlet 2, the fan is installed in the purifier body, the purifier body comprises a multi-stage discharge and catalysis combination unit 3, a first gas detection unit 61, a second gas detection unit 62, a PDM power supply 5 and a data acquisition and control unit 7, the gas input end of the first gas detection unit 61 is connected with the air inlet 1, the gas input end of the multi-stage discharge and catalysis combination unit 3 is connected with the gas output end of the first gas detection unit 61, the gas output end of the multi-stage discharge and catalysis combination unit 3 is connected with the gas input end of the second gas detection unit 62, and the gas output end of the second gas detection unit 62 is connected with the air outlet 2, the output end of the PDM power supply 5 is connected with the input end of the multi-stage discharge and catalysis combined unit 3, the output end of the first gas detection unit 61, the output end of the second gas detection unit 62 and the input end of the data acquisition and control unit 7 are connected, the output end of the data acquisition and control unit 7 is connected with the gas inlet 1, and the PDM power supply 5 is bidirectionally connected with the data acquisition and control unit 7; the multi-stage discharge and catalysis combination unit 3 comprises a medium tube 8, a conductive metal rod 9, a plurality of pairs of high-voltage electrodes, a plurality of pairs of low-voltage electrodes and a plurality of catalysis structures 12, wherein the high-voltage electrodes are arranged in the medium tube 8, the low-voltage electrodes are arranged on the outer surface of the medium tube 8, each pair of high-voltage electrodes and low-voltage electrodes are aligned along the radial direction of the medium tube 8, all the high-voltage electrodes are axially arranged at equal intervals and pass through the center of the medium tube 9 to be fixed, the conductive metal rod 9 is fixed on the position of the central axis of the medium tube 8, and the catalysis structures 12 are arranged between the high.
As shown in fig. 2, the purifier body further includes a power supply voltage collecting unit 13 and a discharge current collecting unit 14, two ends of the power supply voltage collecting unit 13 are respectively connected to the input end of the multi-stage discharge and catalysis combination unit 3 and the input end of the data collection and control unit 7, and two ends of the discharge current collecting unit 14 are respectively connected to the output end of the multi-stage discharge and catalysis combination unit 3 and the input end of the data collection and control unit 7.
As shown in fig. 3 and 4, the high voltage electrode includes an electrode framework 15 and a metal ring 16, the metal ring 16 is mounted on the side surface of the electrode framework 15 in a fitting manner, the conductive metal rod 9 is fixed in the dielectric tube 8 through the ventilation frameworks 24 arranged at the two ends of the dielectric tube 8, the ventilation frameworks are provided with a plurality of ventilation holes, the electrode framework 15 is further fixedly provided with a plurality of conductive metal bridges 23, one end of each conductive metal bridge 23 is connected with the conductive metal rod 9, the other end of each conductive metal bridge is connected with the metal ring 16, the low voltage electrode is a metal foil ring 17, two adjacent metal foil rings 17 are further provided with floating electrode rings 18 in the middle, and the floating electrode rings 18 and the metal foil rings 17 are arranged in parallel.
As shown in fig. 6, a single catalytic structure 12 includes two sieve plates 19 and a catalyst 20, the catalyst 20 is uniformly dispersed between the two sieve plates 19, a metal rod through hole 21 for a conductive metal rod 9 to pass through is disposed at the center of the sieve plate 19, and a plurality of ventilation sieve holes 22 are disposed on the surface of the sieve plate.
The data acquisition and control unit 7 comprises an MCU, a switch key, a display unit and an MCU power supply, the switch key is arranged on a panel of the MCU, the display unit and the MCU power supply are connected with the MCU, the MCU is provided with a first gas detection unit AD end, a second gas detection unit AD end, a supply voltage acquisition unit AD end, a discharge current acquisition unit AD end, a PDM power supply control unit AD end and a fan control unit AD end, the first gas detection unit AD end is connected with the output end of a first gas detection unit 61, the second gas detection unit AD end is connected with the output end of a second gas detection unit 62, the supply voltage acquisition unit AD end is connected with the output end of a supply voltage acquisition unit 13, the discharge current acquisition unit AD end is connected with the output end of a discharge current acquisition unit 14, the PDM power supply control unit AD end is connected with a PDM power supply 5, and the AD end of the fan control unit is connected with the fan.
The medium pipe 8 is made of polytetrafluoroethylene, high-density polypropylene, ceramic or quartz.
The catalyst 20 is in the form of particles.
The catalyst 20 is a composition of Pd or Pt attached to oxides of Mn, Co, Ni and Ag.
Example 2
As shown in fig. 1, a cascaded air purification system combining annular tube discharge and catalysis, which comprises a purifier body and a fan, wherein the purifier body is provided with an air inlet 1 and an air outlet 2, the fan is installed in the purifier body, the purifier body comprises a multi-stage discharge and catalysis combination unit 3, a first gas detection unit 61, a second gas detection unit 62, a PDM power supply 5 and a data acquisition and control unit 7, the gas input end of the first gas detection unit 61 is connected with the air inlet 1, the gas input end of the multi-stage discharge and catalysis combination unit 3 is connected with the gas output end of the first gas detection unit 61, the gas output end of the multi-stage discharge and catalysis combination unit 3 is connected with the gas input end of the second gas detection unit 62, and the gas output end of the second gas detection unit 62 is connected with the air outlet 2, the output end of the PDM power supply 5 is connected with the input end of the multi-stage discharge and catalysis combined unit 3, the output end of the first gas detection unit 61, the output end of the second gas detection unit 62 and the input end of the data acquisition and control unit 7 are connected, the output end of the data acquisition and control unit 7 is connected with the gas inlet 1, and the PDM power supply 5 is bidirectionally connected with the data acquisition and control unit 7; the multi-stage discharge and catalysis combination unit 3 comprises a medium tube 8, a conductive metal rod 9, a plurality of pairs of high-voltage electrodes, a plurality of pairs of low-voltage electrodes and a plurality of catalysis structures 12, wherein the high-voltage electrodes are arranged in the medium tube 8, the low-voltage electrodes are arranged on the outer surface of the medium tube 8, each pair of high-voltage electrodes and low-voltage electrodes are aligned along the radial direction of the medium tube 8, all the high-voltage electrodes are axially arranged at equal intervals and pass through the center of the medium tube 9 to be fixed, the conductive metal rod 9 is fixed on the position of the central axis of the medium tube 8, and the catalysis structures 12 are arranged between the high.
The purifier body still includes supply voltage acquisition unit 13 and discharge current acquisition unit 14, the input that multistage discharge and catalysis ally oneself with unit 3 and the input of data acquisition and the control unit 7 are connected respectively to supply voltage acquisition unit 13's both ends, the output that multistage discharge and catalysis ally oneself with unit 3 and the input of data acquisition and the control unit 7 are connected respectively to discharge current acquisition unit 14's both ends.
The first formaldehyde sensor 611 is provided in the first gas detection unit 61, and the second formaldehyde sensor 621 is provided in the second gas detection unit 62.
The high voltage electrode includes electrode skeleton 15 and becket 16, all the laminating is installed becket 16 on electrode skeleton 15's the side surface, electrically conductive metal pole 9 is fixed in the medium pipe 8 through the skeleton 24 of ventilating that 8 both ends of medium pipe set up, be equipped with a plurality of ventilation hole on the ventilation skeleton, still fixedly set up a plurality of electrically conductive metal bridge 23 on the electrode skeleton 15, electrically conductive metal pole 9 is connected to electrically conductive metal bridge 23 one end, and becket 16 is connected to the other end, the low voltage electricity is becket ring 17, adjacent two still be provided with floating electrode ring 18 in the middle of the becket ring 17, floating electrode and becket ring 17 parallel arrangement.
The single catalytic structure 12 comprises two sieve plates 19 and a catalyst 20, the catalyst 20 is uniformly dispersed between the two sieve plates 19, a metal rod through hole 21 for the conductive metal rod 9 to pass through is arranged in the center of the sieve plate 19, and a plurality of ventilation sieve holes 22 are arranged on the surface of the sieve plate.
The medium pipe 8 is made of polytetrafluoroethylene, high-density polypropylene, ceramic or quartz.
The catalyst 20 is in the form of particles.
As shown in fig. 5, the data collection and control unit 7 includes an MCU, a switch button, a display unit and an MCU power supply, the MCU is provided with a switch button on its panel, the display unit and the MCU power supply are all connected to the MCU, the MCU is provided with a first formaldehyde sensor AD terminal, a second formaldehyde sensor AD terminal, a supply voltage collection unit AD terminal, a discharge current collection unit AD terminal, a PDM power supply control unit AD terminal, and a fan control unit AD terminal, the first formaldehyde sensor AD terminal is connected to the output terminal of the first formaldehyde sensor 611, the second formaldehyde sensor AD terminal is connected to the output terminal of the second formaldehyde sensor 621, the supply voltage collection unit AD terminal is connected to the output terminal of the supply voltage collection unit, the discharge current collection unit AD terminal is connected to the output terminal of the discharge current collection unit 14, the PDM power supply control unit AD terminal is connected to the PDM power supply 5, and the AD end of the fan control unit is connected with the fan.
The catalyst 20 is a composition of Pd or Pt attached to oxides of Mn, Co, Ni and Ag.
It should be noted that, in order to evaluate the efficiency of the system for purifying air, an energy efficiency ratio (E) is useder) This physical quantity is evaluated in g.kWh-1The formula is as follows:
Δ m is the change in mass of the gas exhaust after passing through the reactor, V is the gas volume in the discharge channel, t is the time during which the gas flows in the discharge channel, EtIs the total energy consumed by the high voltage power supply, c0Is the initial concentration of the gas, c1Is the concentration of the corresponding gas after reaction. In addition, there are V-Q.t, Et＝PinT (Q represents the gas flow, P)inRepresenting the power of a high voltage power supply) we have a new formula, as follows:
in the system provided by the present invention, the optimal control parameter for the efficiency of purifying air can be estimated by the above two formulas. Wherein c is0Obtainable from the first gas detection unit, c1May be obtained by the second gas detection unit.
After physical parameters such as discharge parameters, gas concentration, gas flow and the like are obtained, the method is combined with a Newton hill climbing algorithm, and an optimal discharge effect evaluation method is designed. And obtaining a corresponding discharge parameter under the optimal discharge effect according to the change rule of the ozone generation energy efficiency ratio (Eer). And finding out the discharge condition corresponding to the optimal Eer according to the Newton hill climbing algorithm, and determining the corresponding parameter range.
The Newton hill climbing method is also called as disturbance observation method, the change condition of the energy efficiency ratio of the waste gas removal before and after adjustment is compared by continuously adjusting the discharge condition and the gas flow rate of the discharge reaction system, and the discharge condition and the gas flow rate are adjusted by the data acquisition and control unit according to the change condition, so that the system works near the optimal energy efficiency ratio.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an air purification system is united with catalysis to cascade type ring section of thick bamboo discharge, includes clarifier body and fan, be equipped with air inlet (1) and gas outlet (2) on the clarifier body, the fan is installed in the clarifier body, its characterized in that, the clarifier body includes that multistage discharge and catalysis allies oneself with unit (3), first gas detection unit (61), second gas detection unit (62), PDM power (5) and data acquisition and the control unit (7), the gas input of first gas detection unit (61) links to each other with air inlet (1), the gas input of multistage discharge and catalysis allies oneself with unit (3) links to each other with the gas output of first gas detection unit (61), the gas output of multistage discharge and catalysis allies oneself with unit (3) links to each other with the gas input of second gas detection unit (62), the gas output end of the second gas detection unit (61) is connected with the gas outlet (2), the output end of the PDM power supply (5) is connected with the input end of the multi-stage discharge and catalysis combination unit (3), the output end of the first gas detection unit (61), the output end of the second gas detection unit (62) and the input end of the data acquisition and control unit (7) are connected, the output end of the data acquisition and control unit (7) is connected with the gas inlet (1), and the PDM power supply (5) is bidirectionally connected with the data acquisition and control unit (7); the multi-stage discharge and catalysis combination unit (3) comprises a medium tube (8), a conductive metal rod (9), a plurality of pairs of high-voltage electrodes, a plurality of pairs of low-voltage electrodes and a plurality of catalysis structures (12), wherein the high-voltage electrodes are arranged in the medium tube (8), the low-voltage electrodes are arranged on the outer surface of the medium tube (8), and each pair of high-voltage electrodes and low-voltage electrodes are radially aligned along the medium tube (8), all the high-voltage electrodes are axially arranged at equal intervals and pass through the center to be fixed by the conductive metal rod (9), the conductive metal rod (9) is fixed on the center axis of the medium tube (8), and the catalysis structures (12) are arranged between every two adjacent high-voltage electrodes.
2. The air purification system is united with the cascade type ring cylinder discharging and catalyzing according to claim 1, wherein the purifier body further comprises a supply voltage collecting unit (13) and a discharging current collecting unit (14), two ends of the supply voltage collecting unit (13) are respectively connected with an input end of the multi-stage discharging and catalyzing combined unit (3) and an input end of the data collecting and controlling unit (7), and two ends of the discharging current collecting unit (14) are respectively connected with an output end of the multi-stage discharging and catalyzing combined unit (3) and an input end of the data collecting and controlling unit (7).
3. The cascaded annular cylinder discharge and catalysis combined air purification system according to claim 1 or 2, characterized in that the high-voltage electrode comprises an electrode framework (15) and a metal ring (16), the side surfaces of the electrode framework (15) are respectively provided with a metal ring (16) in a fitting manner, the conductive metal rod (9) is fixed in the medium pipe (8) through ventilation frameworks (24) arranged at the two ends of the medium pipe (8), a plurality of ventilation holes are arranged on the ventilation framework (24), a plurality of conductive metal bridges (23) are also fixedly arranged on the electrode framework (15), one end of the conductive metal bridge (23) is connected with the conductive metal rod (9), the other end is connected with the metal ring (16), the low-voltage electrode is a metal foil ring (17), a floating electrode ring (18) is further arranged between every two adjacent metal foil rings (17), and the floating electrode ring (18) and the metal foil rings (17) are arranged in parallel.
4. The cascaded annular cylinder discharge and catalysis combined air purification system according to claim 1 or 2, wherein a single catalytic structure (12) comprises two sieve plates (19) and a catalyst (20), the catalyst (20) is uniformly dispersed between the two sieve plates (19), a metal rod through hole (21) for a conductive metal rod (9) to pass through is formed in the center of each sieve plate (19), and a plurality of ventilation sieve holes (22) are formed in the surface of each sieve plate.
5. The air purification system combining cascade type ring drum discharge and catalysis as claimed in claim 2, wherein a first formaldehyde sensor is arranged in the first gas detection unit (61), and a second formaldehyde sensor is arranged in the second gas detection unit (62).
6. The air purification system combining the cascade type ring cylinder discharge and the catalysis as claimed in claim 2, wherein the data collection and control unit (7) comprises a MCU, a switch button, a display unit and a MCU power supply, the MCU is provided with the switch button on a panel and connected with the display unit and the MCU power supply, the MCU is provided with a first gas detection unit AD end, a second gas detection unit AD end, a supply voltage collection unit AD end, a discharge current collection unit AD end, a PDM power supply (5) control unit AD end and a fan control unit AD end, the first gas detection unit AD end is connected with an output end of a first gas detection unit (61), the second gas detection unit AD end is connected with an output end of a second gas detection unit (62), and the supply voltage collection unit AD end is connected with an output end of a supply voltage collection unit (13), the discharging current acquisition unit AD end is connected with the output end of the discharging current acquisition unit (14), the PDM power supply (5) control unit AD end is connected with the PDM power supply (5), and the fan control unit AD end is connected with the fan.
7. The air purification system combining cascade type ring barrel discharge and catalysis as claimed in claim 3, wherein the medium pipe (8) is made of polytetrafluoroethylene, high-density polypropylene, ceramic or quartz.
8. The cascaded cylinder-annular discharge and catalysis combined air purification system according to claim 4, wherein the catalyst (20) is granular.
9. The air purification system combining the cascade type ring cylinder discharging and catalyzing as claimed in claim 5, wherein the data collecting and controlling unit (7) comprises a MCU, a switch button, a display unit and a MCU power supply, the MCU is provided with the switch button on a panel and the display unit and the MCU power supply are both connected with the MCU, the MCU is provided with a first formaldehyde sensor AD end, a second formaldehyde sensor AD end, a supply voltage collecting unit AD end, a discharge current collecting unit AD end, a PDM power supply controlling unit AD end and a fan controlling unit AD end, the first formaldehyde sensor AD end is connected with an output end of a first formaldehyde sensor (611), the second formaldehyde sensor AD end is connected with an output end of a second formaldehyde sensor (621), the supply voltage collecting unit AD end is connected with an output end of a supply voltage collecting unit (13), and the discharge current collecting unit AD end is connected with an output end of a discharge current collecting unit (14), the PDM power supply control unit AD end is connected with a PDM power supply (5), and the fan control unit AD end is connected with a fan.
10. The cascaded cylinder-annular discharge and catalyst combined air purification system according to claim 8, wherein the catalyst (20) is a composition of Pd or Pt attached to oxides of Mn, Co, Ni and Ag.
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| CN111038226B (en) * | 2019-12-31 | 2023-08-08 | 河海大学常州校区 | Discharge and catalysis combined vehicle-mounted air purifier |
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| GB2415774B (en) * | 2004-06-30 | 2007-06-13 | Alan Mole | Air decontamination device and method |
| KR100763411B1 (en) * | 2006-05-29 | 2007-10-04 | 한국기계연구원 | Catalytic converter with multi-arrangement type for diesel engine |
| CN206566765U (en) * | 2017-02-24 | 2017-10-20 | 浙江旭达环保技术有限公司 | A kind of corona discharge plasma concerted catalysis VOCs controlling devices |
| CN106861383B (en) * | 2017-05-02 | 2019-07-02 | 哈尔滨工业大学 | Energy-saving VOCs processing unit based on multistage dielectric barrier discharge |
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