CN108317602B - Cascaded annular cylinder discharge and catalysis combined air purification system - Google Patents

Abstract

The invention discloses a cascading ring-tube discharge and catalysis combined air purification system, comprising a purifier body and a fan. The purifier body includes a multi-stage discharge and catalysis combined unit, a first gas detection unit, a second gas detection unit, The PDM power supply and data acquisition and control unit, the multi-stage discharge and catalysis combined unit is connected to the air inlet, the air outlet, the first and second gas detection units are all connected to the multi-stage discharge and catalysis combined unit, and the PDM power supply is connected to the multi-stage discharge and catalysis combined unit. The stage discharge is connected with the catalytic combined unit, the first and second gas detection units are connected with the data acquisition and control unit, the data acquisition and control unit are respectively connected with the PDM power supply and the air inlet, and the multi-stage discharge and catalytic combined unit includes a medium Tubes, conductive metal rods, several pairs of high-voltage electrodes and low-voltage electrodes, and several catalytic structures; it has the characteristics of being able to realize automatic detection, high processing efficiency, low energy consumption, wide processing range, no secondary pollution, and low cost.

Description

Cascade ring-tube discharge and catalytic combined air purification system

technical field

The invention belongs to the field of air purification, and in particular relates to a cascaded ring-tube discharge and catalysis combined air purification system.

Background technique

The problem of air pollution is becoming more and more acute, and how to solve the problem of air pollution has attracted much attention. In recent years, PM2.5 (particulate matter with aerodynamic equivalent diameter less than or equal to 2.5 μm in ambient air) has been listed as a first-class carcinogen, and China’s annual industrial smoke (powder) dust emissions exceed 12.781 million tons (burning soot (powder) Dust emissions reached 10 billion tons), and about 1 billion people in China currently live in an environment where the total suspended particulate matter exceeds the standard. Reducing air pollution can not only save millions of lives, but also reduce huge economic losses. It is urgent to solve the problem of air pollution.

At present, air purification technologies mainly include filtration technology, ozone technology, ultraviolet technology, negative ion technology, and photocatalytic technology. A large number of studies have shown that UV technology cannot remove organic pollutants, odors and fine particulate matter, etc.; while filtration technology cannot remove fine particulate matter, the efficiency is low, and the filter screen needs to be replaced regularly, which is too expensive; electrostatic dust removal technology consumes high energy and generates solid waste. Difficult to clean up; ozone technology produces high concentrations of ozone, posing a threat to human health. All in all, these technologies have their own shortcomings in the types of pollutants, cost, efficiency, and no secondary pollution.

Patent CN105170327A discloses a corona discharge air purification device, which is driven by a high voltage power supply, discharges in the area between the needle plate electrodes, and uses photocatalysis to treat by-products. However, it has not been adsorbed on the basis of treating toxic gases. 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 a wire-cylinder type. However, due to the limitation of its structure, the purification efficiency is not high, and it has no function of adsorbing and treating toxic components in toxic gases.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a process of using a dielectric barrier discharge reactor to process toxic gases, and using a chemical catalyst to catalyze the adsorption of by-products, with high treatment efficiency, low energy consumption, wide treatment range, A cascaded ring-tube discharge and catalytic combined air purification system with no secondary pollution and low cost.

The present invention solves its technical problem and realizes through the following technical solutions:

A cascading ring-tube discharge and catalytic combined air purification system includes a purifier body and a fan, the purifier body is provided with an air inlet and an air outlet, the fan is installed in the purifier body, and the purification The device body includes a multi-stage discharge and catalysis combined unit, a first gas detection unit, a second gas detection unit, a PDM power supply and a data acquisition and control unit, and the gas input end of the first gas detection unit is connected to the air inlet, The gas input end of the multi-stage discharge and catalysis combined unit is connected with the gas output end of the first gas detection unit, and the gas output end of the multi-stage discharge and catalysis combined unit is connected with the gas input end of the second gas detection unit Connected, the gas output end of the second gas detection unit is connected with the gas outlet, the output end of the PDM power supply is connected with the input end of the multi-stage discharge and catalysis combined unit, the output end of the first gas detection unit, the second The output end of the gas detection unit is connected with the input end of the data acquisition and control unit, the output end of the data acquisition and control unit is connected with the air inlet, and the PDM power supply is bidirectionally connected with the data acquisition and control unit; The combined discharge and catalysis unit includes a dielectric tube, a conductive metal rod, several pairs of high-voltage electrodes, low-voltage electrodes, and several catalytic structures. The high-voltage electrodes are placed in the dielectric tube, and the low-voltage electrodes are placed on the outer surface of the dielectric tube. The high-voltage electrode and the low-voltage electrode are radially aligned along the medium tube, and all the high-voltage electrodes are axially arranged at equal intervals, and are fixed by a conductive metal rod passing through the center, and the conductive metal rod is fixed on the central axis position of the medium tube. A catalytic structure is installed between two adjacent high-voltage electrodes.

As a further improved technical solution of the present invention, the purifier body further includes a power supply voltage collection unit and a discharge current collection unit, and both ends of the power supply voltage collection unit are respectively connected to the input end and data of the multi-stage discharge and catalysis combined unit. The input end of the collection and control unit, the two ends of the discharge current collection unit are respectively connected to the output end of the multi-stage discharge and catalysis combined unit and the input end of the data collection and control unit.

As a further improved technical solution of the present invention, the high-voltage electrode includes an electrode skeleton and a metal ring, the side surfaces of the electrode skeleton are fitted with metal rings, and the conductive metal rod passes through the ventilation skeletons provided at both ends of the medium tube. It is fixed in the medium pipe, the ventilation skeleton is provided with several ventilation holes, and the electrode skeleton is also fixedly provided with several conductive metal bridges, one end of the conductive metal bridge is connected to the conductive metal rod, and the other end is connected to the metal ring. The low-voltage electrode is a metal foil ring, and a floating electrode ring is also arranged between two adjacent metal foil rings, and the floating electrode ring is arranged in parallel with the metal foil ring.

As a further improved technical solution of the present invention, the single catalytic structure includes two sieve plates and a catalyst, the catalyst is uniformly dispersed between the two sieve plates, and the center of the sieve plate is provided with a conductive metal rod to pass through The through hole of the metal rod is provided with several ventilation sieve holes on the surface.

As a further improved technical solution of the present invention, a first formaldehyde sensor is arranged in the first gas detection unit, and a second formaldehyde sensor is arranged in the second gas detection unit.

As a further improved technical solution of the present invention, the data acquisition and control unit includes an MCU, a switch button, a display unit and an MCU power supply, a switch button is provided on the panel of the MCU, and the display unit and the MCU power supply are both connected to the MCU, The MCU is provided with an AD end of a first gas detection unit, an AD end of a second gas detection unit, an AD end of a power supply voltage collection unit, an AD end of a discharge current collection unit, an AD end of a PDM power supply control unit, and an AD end of a fan control unit. The AD terminal of the first gas detection unit is connected to the output terminal of the first gas detection unit, the AD terminal of the second gas detection unit is connected to the output terminal of the second gas detection unit, and the AD terminal of the power supply voltage acquisition unit is connected to the power supply voltage acquisition terminal. The output end of the unit is connected, the AD end of the discharge current collection unit is connected with the output end of the discharge current collection unit, the AD end of the PDM power supply control unit 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 solution of the present invention, the material of the medium pipe adopts polytetrafluoroethylene, high-density polypropylene, ceramics or quartz.

As a further improved technical solution of the present invention, the catalyst is in the form of particles.

As a further improved technical solution of the present invention, the data acquisition and control unit includes an MCU, a switch button, a display unit and an MCU power supply, a switch button is provided on the panel of the MCU, and the display unit and the MCU power supply are both connected to the MCU, The MCU is provided with a first formaldehyde sensor AD terminal, a second formaldehyde sensor AD terminal, a power supply voltage acquisition unit AD terminal, a discharge current acquisition unit AD terminal, a PDM power supply control unit AD terminal, and a fan control unit AD terminal. The AD end of the formaldehyde sensor is connected with the output end of the first formaldehyde sensor, the AD end of the second formaldehyde sensor is connected with the output end of the second formaldehyde sensor, and the AD end of the power supply voltage acquisition unit is connected with the output end of the power supply voltage acquisition unit, The AD end of the discharge current collection unit is connected to the output end of the discharge current collection unit, the AD end of the PDM power control unit is connected to the PDM power supply, and the AD end of the fan control unit is connected to the fan.

As a further improved technical solution of the present invention, the catalyst is a composition in which Pd or Pt is attached to oxides of Mn, Co, Ni and Ag.

The catalytic structure is mainly to make the catalyst into particles and evenly distribute it in the container to ensure sufficient catalytic adsorption of by-products. The present invention utilizes noble metals attached to transition metal oxide catalysts to decompose and adsorb _NOx and O ₃ , and ozone degradation catalysts can use noble metals such as Pd or Pt, or oxides of transition metals such as Mn, Co, Ni and Ag. The main principle of decomposing O ₃ is to convert O ₃ to O ₂ . When ozone gas flows through MnO2, ozone molecules bind to the surface of _MnO2 by inserting O atoms into oxygen vacancies. Oxygen vacancies are 2-electrons, and the 2-electrons are transferred to the O atom of ozone, thereby forming oxygen species (O ₂ -) in the oxygen vacancies and desorbing oxygen molecules in air. Then, another ozone molecule reacts with O ₂ to form gas-phase oxygen molecules and a bridged O ₂ dimer (peroxide O ₂₂ − ), which is observed by in situ Raman spectroscopy. Finally, peroxide (O ₂₂ − ) decomposes to release an oxygen molecule, so the oxygen vacancy is recovered, which can participate in the next cycle to decompose ozone. _The main principle for the decomposition of NO2 is that the decomposition of _O3 over transition metal oxides such as MnOx catalysts occurs through electron transfer from _Mnn + to _O3 . This will cause O to _decompose into molecular oxygen and atomic oxygen O*. The unstable O ₂₂ -Mn _(n+2) + complex then decomposes by reducing the oxidized manganese to Mn ₂ + and desorbing oxygen molecules. The manganese oxide catalyst forms active atomic oxygen O* during the decomposition of _O3 . Similar decomposition mechanisms are also used for other metal oxides (eg FeO) or noble metals (eg Pd). Additionally, NO ₂ can be oxidized to NO _{3 by O* and O 3 .} And NO ₃ disappears easily and is converted into solid N ₂ O ₅ .

The reaction system composed of gas reactants and solid catalysts is called gas-solid heterogeneous catalytic reaction, and its catalytic process generally includes five steps: (I) ozone and _NOx molecules diffuse to the surface of the catalyst; (II) ozone and _NOx Molecules are adsorbed on the catalyst surface; (III) the intermediate reaction (surface reaction) of ozone and _NOx molecules produces O* and O ₂ and N ₂ O ₅ ; (IV) the produced gas is desorbed from the catalyst surface; (V) the produced gas The gas diffuses away from the catalyst surface.

The main equations are as follows:

4Mn ⁴⁺ +O ² -→4Mn ⁴⁺ +2e+1/2O ₂ →2Mn ⁴⁺ +2Mn ³⁺ +1/2O ₂

O ₃ →O ₂ +O*

NO+O*→NO ₂

NO ₂ +O ₃ *→NO+2O ₂

HNO ₂ +OH*→NO ₂ +H ₂ O

NO ₂ +O*→NO ₃

N ₂ O ₅ can be completely decomposed at 47°C. Therefore, when the catalyst is saturated, it is heated, and the volatilized gas is passed into the NaOH solution, after which the catalyst can be reused. After the degradation and adsorption of the catalytic unit, the device can discharge clean gas into the air.

The beneficial effects of the present invention are:

(1) The present invention fills a catalyst in the interval of the discharge electrode, utilizes the mechanical strength of the fan to simultaneously absorb indoor and outdoor contaminated air containing particulate matter and toxic substances, first filters the absorbed gas, and then uses a dielectric barrier discharge unit to Small particulate matter and volatile toxic components are treated; for the products O3 and NOX produced by the discharge unit, the present invention uses precious metals to adhere to transition metal oxides to carry out catalytic adsorption treatment; at the same time, there is a special design at the outlet. The exhaust fan exhausts clean air to the outside world; the whole system uses strong mechanical air supply while filtering and purifying the air sent into the room.

(2) Compared with the traditional technology, the present invention has the advantages of high processing efficiency, low energy consumption, wide processing range, no secondary pollution, and low cost.

(3) The present invention can efficiently and quickly treat polluted air, such as smog, etc., improve air quality, control air pollution caused by factory exhaust gas, etc., and reduce the incidence of diseases such as respiratory tract.

Description of drawings

Fig. 1 is the framework diagram of the present invention;

2 is a frame diagram of Embodiment 1 of the present invention;

Fig. 3 is the mechanism schematic diagram of the multi-stage discharge and catalysis combined use unit in the present invention;

4 is a schematic cross-sectional structure diagram of a high-voltage electrode in the present invention;

5 is a schematic structural diagram of a data acquisition and control unit according to Embodiment 2 of the present invention;

Fig. 6 is the structural representation of the catalytic structure in the present invention;

Description of reference numerals: 1. Air inlet; 2. Air outlet; 3. Multi-stage discharge and catalytic combined unit; 5. PDM power supply; 61, First gas detection unit; 611, First formaldehyde sensor; 62, No. 2. Gas detection unit; 621. The second formaldehyde sensor; 7. Data acquisition and control unit; 8. Medium tube; 9. Conductive metal rod; 12. Catalytic structure; 13. Supply voltage acquisition unit; 14. Discharge current acquisition unit; 15, electrode frame; 16, metal ring; 17, metal foil ring; 18, floating electrode ring; 19, sieve plate; 20, catalyst; 21, metal rod through hole; 22, ventilation sieve hole; 23, conductive metal bridge; 24. Ventilation skeleton.

Detailed ways

The present invention will be further described in detail below through specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

Example 1

As shown in Figure 1, a cascaded annular discharge and catalytic combined air purification system includes a purifier body and a fan. The purifier body is provided with an air inlet 1 and an air outlet 2, and the fan is installed in In the purifier body, the purifier body includes a multi-stage discharge and catalysis combined 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 first gas detection unit 61. The gas input end of the gas detection unit 61 is connected to the air inlet 1, the gas input end of the multi-stage discharge and catalysis combined unit 3 is connected to the gas output end of the first gas detection unit 61, and the multi-stage discharge and catalysis unit 3 are connected to the gas output end. The gas output end of the combined unit 3 is connected with the gas input end of the second gas detection unit 62, the gas output end of the second gas detection unit 62 is connected with the gas outlet 2, and the output end of the PDM power supply 5 is connected with the multi-stage gas outlet 2. The discharge is connected to the input end of the catalytic 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, and the data acquisition and control unit are connected. The output end of 7 is connected to the air inlet 1, and the PDM power supply 5 is bidirectionally connected to the data acquisition and control unit 7; Electrodes, low-voltage electrodes and several catalytic structures 12, the high-voltage electrodes are placed in the medium tube 8, the low-voltage electrodes are placed on the outer surface of the medium tube 8, and each pair of the high-voltage electrodes and the low-voltage electrodes are radially aligned along the medium tube 8, All the high-voltage electrodes are axially arranged at equal intervals, and are fixed by a conductive metal rod 9 passing through the center. The conductive metal rod 9 is fixed on the central axis of the dielectric tube 8, between two adjacent high-voltage electrodes. A catalytic structure 12 is installed.

As shown in FIG. 2 , the purifier body further includes a power supply voltage collection unit 13 and a discharge current collection unit 14 , and the two ends of the power supply voltage collection unit 13 are respectively connected to the input end of the multi-stage discharge and catalysis combined unit 3 and the The input end of the data collection and control unit 7 , the two ends of the discharge current collection unit 14 are respectively connected to the output end of the multi-stage discharge and catalysis combined unit 3 and the input end of the data collection and control unit 7 .

As shown in FIGS. 3 and 4 , the high-voltage electrode includes an electrode skeleton 15 and a metal ring 16 . The side surface of the electrode skeleton 15 is fitted with a metal ring 16 , and the conductive metal rod 9 passes through the dielectric tube 8 . The ventilation frame 24 provided at the end is fixed in the medium pipe 8, the ventilation frame is provided with several ventilation holes, and the electrode frame 15 is also fixedly arranged with a plurality of conductive metal bridges 23, and one end of the conductive metal bridge 23 is connected to the conductive metal bridge 23. The other end of the metal rod 9 is connected to a metal ring 16. The low-voltage electrode is a metal foil ring 17. A floating electrode ring 18 is also arranged between two adjacent metal foil rings 17. The floating electrode ring 18 is connected to the metal foil ring. 17 parallel settings.

As shown in FIG. 6 , the single catalytic structure 12 includes two sieve plates 19 and a catalyst 20 , the catalyst 20 is evenly dispersed between the two sieve plates 19 , and the center of the sieve plate 19 is provided with a conductive metal The metal rod through holes 21 through which the rods 9 pass are provided with several ventilation screen holes 22 on the surface.

The data acquisition and control unit 7 includes an MCU, a switch button, a display unit, and an MCU power supply. A switch button is provided on the panel of the MCU. The display unit and the MCU power supply are both connected to the MCU, and the MCU is provided with a first gas. The AD end of the detection unit, the AD end of the second gas detection unit, the AD end of the power supply voltage collection unit, the AD end of the discharge current collection unit, the AD end of the PDM power control unit, and the AD end of the fan control unit, the AD end of the first gas detection unit is connected to the AD end of the first gas detection unit. The output terminal of the first gas detection unit 61 is connected, the AD terminal of the second gas detection unit is connected to the output terminal of the second gas detection unit 62 , and the AD terminal of the power supply voltage acquisition unit is connected to the output terminal of the power supply voltage acquisition unit 13 , the AD end of the discharge current collection unit is connected to the output end of the discharge current collection unit 14 , the AD end of the PDM power supply control unit is connected to the PDM power supply 5 , and the AD end of the fan control unit is connected to the fan.

The material of the medium tube 8 is polytetrafluoroethylene, high-density polypropylene, ceramics or quartz.

The catalyst 20 is in the form of particles.

The catalyst 20 is a composition in which Pd or Pt is attached to oxides of Mn, Co, Ni and Ag.

Example 2

As shown in Figure 1, a cascaded annular discharge and catalytic combined air purification system includes a purifier body and a fan. The purifier body is provided with an air inlet 1 and an air outlet 2, and the fan is installed in In the purifier body, the purifier body includes a multi-stage discharge and catalysis combined 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 first gas detection unit 61. The gas input end of the gas detection unit 61 is connected to the air inlet 1, the gas input end of the multi-stage discharge and catalysis combined unit 3 is connected to the gas output end of the first gas detection unit 61, and the multi-stage discharge and catalysis unit 3 are connected to the gas output end. The gas output end of the combined unit 3 is connected with the gas input end of the second gas detection unit 62, the gas output end of the second gas detection unit 62 is connected with the gas outlet 2, and the output end of the PDM power supply 5 is connected with the multi-stage gas outlet 2. The discharge is connected to the input end of the catalytic 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, and the data acquisition and control unit are connected. The output end of 7 is connected to the air inlet 1, and the PDM power supply 5 is bidirectionally connected to the data acquisition and control unit 7; Electrodes, low-voltage electrodes and several catalytic structures 12, the high-voltage electrodes are placed in the medium tube 8, the low-voltage electrodes are placed on the outer surface of the medium tube 8, and each pair of the high-voltage electrodes and the low-voltage electrodes are radially aligned along the medium tube 8, All the high-voltage electrodes are axially arranged at equal intervals, and are fixed by a conductive metal rod 9 passing through the center. The conductive metal rod 9 is fixed on the central axis of the dielectric tube 8, between two adjacent high-voltage electrodes. A catalytic structure 12 is installed.

The purifier body also includes a power supply voltage collection unit 13 and a discharge current collection unit 14. Both ends of the power supply voltage collection unit 13 are respectively connected to the input end of the multi-stage discharge and catalysis combined unit 3 and the data collection and control unit 7. The two ends of the discharge current collection unit 14 are respectively connected to the output end of the multi-stage discharge and catalysis combined unit 3 and the input end of the data acquisition and control unit 7 .

The first gas detection unit 61 is provided with a first formaldehyde sensor 611 , and the second gas detection unit 62 is provided with a second formaldehyde sensor 621 .

The high-voltage electrode includes an electrode skeleton 15 and a metal ring 16 . The side surface of the electrode skeleton 15 is fitted with a metal ring 16 , and the conductive metal rod 9 is fixed to the ventilation skeleton 24 provided at both ends of the medium tube 8 . In the medium pipe 8, the ventilation frame is provided with several ventilation holes, and the electrode frame 15 is also fixedly provided with several conductive metal bridges 23, one end of the conductive metal bridge 23 is connected to the conductive metal rod 9, and the other end is connected to the metal Ring 16 , the low-voltage electrode is a metal foil ring 17 , a floating electrode ring 18 is also arranged between two adjacent metal foil rings 17 , and the floating electrode is arranged in parallel with the metal foil ring 17 .

The single catalytic structure 12 includes two sieve plates 19 and a catalyst 20, the catalyst 20 is evenly dispersed between the two sieve plates 19, and the center of the sieve plate 19 is provided with a metal for the conductive metal rod 9 to pass through. The rod through hole 21 is provided with several ventilation screen holes 22 on the surface.

The material of the medium tube 8 is polytetrafluoroethylene, high-density polypropylene, ceramics or quartz.

The catalyst 20 is in the form of particles.

As shown in FIG. 5 , the data acquisition and control unit 7 includes an MCU, a switch button, a display unit and an MCU power supply. The switch button is set on the panel of the MCU, and the display unit and the MCU power supply are all connected to the MCU. The MCU has a first formaldehyde sensor AD terminal, a second formaldehyde sensor AD terminal, a power supply voltage acquisition unit AD terminal, a discharge current acquisition unit AD terminal, a PDM power supply control unit AD terminal, and a fan control unit AD terminal. The first formaldehyde sensor The AD terminal is connected to the output terminal of the first formaldehyde sensor 611, the AD terminal of the second formaldehyde sensor is connected to the output terminal of the second formaldehyde sensor 621, the AD terminal of the power supply voltage acquisition unit is connected to the output terminal of the power supply voltage acquisition unit, The AD terminal of the discharge current acquisition unit is connected to the output terminal of the discharge current acquisition unit 14 , the AD terminal of the PDM power supply control unit is connected to the PDM power supply 5 , and the AD terminal of the fan control unit is connected to the fan.

The catalyst 20 is a composition in which Pd or Pt is attached to oxides of Mn, Co, Ni and Ag.

It should be noted that, in order to evaluate the air purification efficiency of the system, the physical quantity of energy efficiency ratio (E _er ) is used for evaluation, and its unit is g.kWh ^-1 , and its formula is as follows:

Δm is the mass change of the gas exhaust gas after passing through the reactor, V is the gas volume in the discharge channel, t is the gas flow time in the discharge channel, E _t is the total energy consumed by the high-voltage power supply, c ₀ is the initial concentration of the gas, c ₁ is the concentration of the corresponding gas after reaction. In addition, there is V=Qt, E _t =P _{in .t} (Q represents the gas flow, and Pin represents the power of the high-voltage power supply) So, we get a new formula, as follows:

In the system provided by the present invention, the optimal control parameters for the efficiency of purifying air can be estimated by the above two formulas. Wherein c ₀ can be obtained by the first gas detection unit, and c ₁ can be obtained by the second gas detection unit.

After obtaining physical parameters such as discharge parameters, gas concentration and gas flow rate, the present invention combines with Newton's hill-climbing algorithm to design an optimal discharge effect evaluation method. According to the change rule of the ozone generation energy efficiency ratio (Eer), the corresponding discharge parameters in the best discharge effect are obtained. According to Newton's hill-climbing algorithm, find out the discharge condition corresponding to the best Eer, and determine the corresponding parameter range.

Newton's hill-climbing method is also called disturbance observation method. In the present invention, the discharge conditions and gas flow rate of the discharge reaction system are continuously adjusted to compare the change of the exhaust gas removal energy efficiency ratio before and after the adjustment, and then the discharge is adjusted by the data acquisition and control unit according to the change. conditions and gas flow rates to make the system work near the best energy efficiency ratio.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should 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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