Device for purifying non-methane hydrocarbon in air through plasma photolysis

Abstract

The utility model relates to a device for purifying non-methane hydrocarbon in air through plasma photolysis. The device comprises a plurality of plasma purification units and air distribution plate groups, wherein the plasma purification units are arranged in a cylindrical cavity of a shell and are distributed at intervals along the axial direction; the air distribution plate groups are fixedly arranged in the cylindrical cavity and are respectively and oppositely arranged on the upstream sides of the plasma purification units; the air distribution plate set comprises a first plate and a second plate, and an axial distance is kept between the opposite faces of the first plate and the second plate. A plurality of through holes arranged in rows are distributed in the first plate. A plurality of rows of ridges are distributed on the second plate, and strip-shaped holes are formed between every two adjacent rows of ridges. And each row of through holes in the first plate can be opposite to each row of ridges on the second plate one by one. According to the utility model, air containing non-methane hydrocarbon can be promoted to generate turbulent flow when flowing through the reaction cavity, so that the sufficiency and uniformity of the action of the air with ultraviolet light, plasma and the like are improved, and the treatment efficiency of waste gas can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas purification and treatment, in particular to a device for purifying non-methane total hydrocarbons in the air by plasma photolysis. Background Art

[0002] With the comprehensive development of industrialization, the amount of waste gas discharged into the air is increasing, and the composition is becoming more and more complex and diverse. When the concentration of non-methane hydrocarbons in the air is high, it can not only directly harm human health, but also produce photochemical smog and form photochemical pollution under certain conditions after exposure to sunlight. In the past technology, plasma photocatalytic-purification device is a commonly used device for purifying and treating non-methane hydrocarbon waste gas contained in the air.

[0003] In the existing device for purifying waste gases such as non-methane hydrocarbons contained in the air, when treating the non-methane hydrocarbons in the air, the air containing the non-methane hydrocarbons is sucked into the reaction chamber of the device through a fan, so that the air repeatedly flows through the catalytic reaction unit section arranged in the reaction chamber, and continuously acts with ultraviolet light, plasma, etc., to achieve the degradation treatment of the non-methane hydrocarbon waste gas. However, when the air containing the non-methane hydrocarbon waste gas flows through the reaction chamber of the existing device, the uniformity of the contact between the non-methane hydrocarbons and other harmful components in the air and the ultraviolet light, plasma, etc. in the reaction chamber is very limited, which is easy to limit the treatment efficiency of the non-methane hydrocarbons and other components in the air that rely on plasma photolysis to purify, and it is not easy to ensure that the emission standard of the purified air meets the environmental emission standard. Utility Model Content

[0004] Aiming at the problem that when non-methane total hydrocarbons contained in the air flow through a reaction chamber, the uniformity of the interaction with ultraviolet light, plasma, etc. in the reaction chamber is relatively poor, resulting in low reaction treatment efficiency, the utility model provides a device for purifying non-methane total hydrocarbons in the air by plasma photolysis, which can cause turbulence when the air containing non-methane total hydrocarbons flows through the reaction chamber, thereby increasing the sufficiency and uniformity of the interaction between the air and ultraviolet light, plasma, etc., and can improve the treatment efficiency of the exhaust gas.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a device for purifying non-methane total hydrocarbons in the air by plasma photolysis, including a pre-purification unit arranged at the air inlet of the shell, a duct fan arranged at the air outlet of the shell, a plurality of plasma purification units distributed alternately along the axial direction in the cylindrical cavity of the shell, and an air distribution plate group fixedly arranged in the cylindrical cavity of the shell and respectively arranged on the upstream side of each plasma purification unit.

[0006] Generally, the plasma purification units and the air distribution plate groups are matched in a one-to-one relationship.

[0007] The air distribution plate group includes plate 1 and plate 2, and a spacing along the axial direction is maintained between the opposite surfaces of plate 1 and plate 2. A plurality of through holes are distributed on the plate surface of plate 1, and the plurality of through holes are divided into a plurality of rows.

[0008] A plurality of rows of ridges are distributed on the plate surface of the second plate, and strip holes are formed between two adjacent rows of ridges.

[0009] After assembly, each row of through holes on the first plate can be opposite to each row of ridges on the second plate.

[0010] Optionally, on the board surface of the second board, a strip hole is formed on both sides of the root of each ridge bar respectively.

[0011] Optionally, the transverse cross-section of the ridge is triangular in shape and the width at the root of the ridge is smaller than the inner diameter of the through hole.

[0012] Optionally, the transverse cross-section of the strip-shaped hole is trapezoidal in shape, with the long side facing one side of the plate.

[0013] Optionally, the transverse cross-section of the strip holes is a parallelogram and the inclination direction of the two strip holes located between two adjacent ridges is consistent with the inclination direction of the hypotenuse of the adjacent ridges. In other words, the inclination directions of the two strip holes located between two adjacent ridges are opposite.

[0014] Optionally, an annular flange is formed on the end surface of the plate 2 facing the plasma purification unit, and the inner cavity of the annular flange is a contraction cavity, wherein the small diameter end of the contraction cavity faces the plasma purification unit.

[0015] Optionally, the plate 1 and the plate 2 are connected via a plurality of connecting rod groups, and the connecting rod groups are alternately distributed around the circumferential direction.

[0016] Optionally, the connecting rod group includes a screw rod, a pair of springs and a pair of nuts. One end of the screw rod is fixed on the first plate, and the other end passes through the light column through hole provided on the second plate, and the two springs are arranged on the screw rod and are relatively distributed on both sides of the two ports of the light column through hole. The two nuts match the external thread section provided on the screw rod, and the two nuts correspond to the ends of the two springs away from the second plate. In this way, by screwing the two nuts to the axial position matching the external thread section on the screw rod, the initial compression state of the two springs can be adjusted respectively.

[0017] The beneficial effect of the utility model is that the patent solves the problem of low reaction efficiency in current devices due to the relatively poor uniformity of the non-methane total hydrocarbons contained in the air when flowing through the reaction chamber due to the relatively poor degree of uniformity of the reaction with the ultraviolet light, plasma, etc. in the reaction chamber. Specifically, the device for purifying non-methane total hydrocarbons in the air by plasma photolysis can cause significant turbulence when the air containing non-methane total hydrocarbons flows through the reaction chamber, thereby increasing the sufficiency and uniformity of the reaction between the air and the ultraviolet light, plasma, etc., shortening the duration of the cyclic purification treatment, thereby improving the treatment efficiency of the exhaust gas and helping the purified discharged air to meet the emission standards relatively stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the implementation scheme of this patent.

[0019] Figure 2 This is a schematic diagram of the side view structure of plate one.

[0020] Figure 3 This is a schematic diagram of the side structure of plate 2.

[0021] Figure 4 It is a side view structural schematic diagram when the plate 1 and the plate 2 are arranged alternately in the axial direction.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure when the plate 1 and the plate 2 are arranged relative to each other (implementation method 1).

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure when the plate 1 and the plate 2 are arranged relative to each other (implementation method 2).

[0024] Figure 7 It is a structural schematic diagram (partial cross-section) when the plate 1 and the plate 2 are connected as a whole through a connecting rod group.

[0025] In the figure: 10 housing, 11 air inlet, 12 air outlet;

[0026] 20 pre-purification unit, 30 pipeline fan, 40 plasma purification unit one, 50 plasma purification unit two;

[0027] 60 air distribution plate group, 61 plate one, 611 through hole, 62 plate two, 621 ridge, 622 strip hole, 623 shrinkage cavity, 63 connecting rod group, 631 screw rod, 632 first spring, 633 first nut, 634 second spring, 635 second nut. DETAILED DESCRIPTION

[0028] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0029] like Figures 1 to 6 The device shown is for purifying non-methane total hydrocarbons in the air by plasma photolysis, comprising a pre-purification unit 20 arranged at the air inlet 11 of the outer shell 10, a duct fan 30 arranged at the air outlet 12 of the outer shell 10, plasma purification units 40 and 50 arranged alternately along the axial direction in the cylindrical cavity of the outer shell 10, and an air distribution plate group 60 fixed in the cylindrical cavity of the outer shell 10 and respectively arranged on the upstream side of each plasma purification unit.

[0030] Generally, the plasma purification units and the air distribution plate groups 60 are in a one-to-one matching relationship.

[0031] The air distribution plate group 60 includes a plate 1 61 and a plate 2 62 , and a distance is maintained between the opposite surfaces of the plate 1 61 and the plate 2 62 along the axial direction of the housing 10 .

[0032] A plurality of through holes 611 are distributed on the plate surface of the plate 1 61 and the plurality of through holes 611 are divided into a plurality of rows.

[0033] A plurality of rows of ridges 621 are distributed on the plate surface of the second plate 62 , and strip-shaped holes 622 are formed between two adjacent rows of ridges 621 .

[0034] After assembly, each row of through holes 611 of the plate 1 61 can be aligned with each row of ridges 621 on the plate 2 62. After the duct fan 30 is turned on to draw outside air from the air inlet 11 into the cylindrical cavity of the housing 10, it flows to the air distribution plate group 60 after being pre-processed by the pre-purification unit 20 and partially acts on the air distribution plate group 60, so that the air acts evenly on the plasma purification unit 1 40 adjacent to the air distribution plate group 60, and then flows from the plasma purification unit 1 40 to another air distribution plate group 60 and is evenly distributed on the plasma purification unit 2 50, and finally discharged from the air outlet 12 to the outside of the cylindrical cavity of the housing 10.

[0035] By means of the effect of the air distribution plate group 60 on the air flow state, the turbulent state of the air flow can be promoted, so that the non-methane total hydrocarbon substances in the air are evenly dispersed in the air flow to interact with the plasma purification unit, which helps to improve the purification treatment effect of the non-methane total hydrocarbon substances. In the end, the air containing non-methane total hydrocarbon substances is significantly purified after flowing through the multi-stage air distribution plate group 60 and the plasma purification unit, and the purification effect and thoroughness can be significantly improved compared with the existing ones.

[0036] The transverse cross section of the ridge 621 is triangular in shape and the width of the ridge 621 at the root is smaller than the inner diameter of the through hole 611. Figures 4 to 6 Such a structure can increase the degree of disturbance of the air flow during the flow process, which helps to further promote the uniformity of the distribution of non-methane total hydrocarbons in the air flow, and can fully and evenly act with the plasma purification unit 1 40 and the plasma purification unit 2 50 respectively to improve the thoroughness of the treatment of non-methane total hydrocarbons in the air.

[0037] The transverse cross section of the strip hole 622 is trapezoidal in shape with the long side facing one side of the plate 1 61. Figure 5 shown.

[0038] On the plate surface of the second plate 62, a strip hole 622 is formed on both sides of the root of each ridge 621, as shown in FIG. Figures 5 and 6 shown.

[0039] The above structural features can further promote the uniform distribution of non-methane total hydrocarbons at different positions in the air flow after the air flows through the strip holes 622 on the second plate 62, so as to promote the full interaction of non-methane total hydrocarbons with each plasma purification unit.

[0040] The transverse cross section of the strip holes 622 is in the shape of a parallelogram and the inclination direction of the two strip holes 622 located between two adjacent ridges 621 is consistent with the inclination direction of the hypotenuse of the adjacent ridges 621. In other words, the inclination directions of the two strip holes 622 located between two adjacent ridges 621 are opposite, as shown in FIG. Figure 6 Such a structure can significantly promote the turbulence of the air flow after it passes through each strip hole 622 on the second plate 62, and promote sufficient mixing of the air flow in the radial direction, so as to promote the uniform distribution of non-methane total hydrocarbons in the air flow on the entire radial interface surface, so as to improve the thoroughness of the plasma purification unit in treating non-methane total hydrocarbons and improve the purification effect of the air.

[0041] An annular flange is formed on the end surface of the plate 2 62 facing the plasma purification unit, and the inner cavity of the annular flange is a contraction cavity 623. The small diameter end of the contraction cavity 623 faces the plasma purification unit. Such a structure can increase the flow capacity of the air flow in the axial direction and promote the axial flow speed.

[0042] The plate 1 61 and the plate 2 62 are connected by a plurality of connecting rod groups 63 and the connecting rod groups 63 are alternately distributed around the circumference. The connecting rod group 63 includes a screw rod 631, a first spring 632 and a first nut 633, and a second spring 634 and a second nut 635.

[0043] One end of the screw rod 631 is fixed on the plate 1 61, and the other end passes through the light column through hole provided on the plate 2 62. After the first spring 632 and the second spring 634 are respectively mounted on the screw rod 631, they are relatively distributed on both sides of the two ends of the light column through hole.

[0044] The two nuts match the external thread segments on the screw rod 631 and the two nuts correspond to the ends of the two springs away from the plate 2 62. In this way, by screwing the two nuts to the axial positions matching the external thread segments on the screw rod 631, the initial compression states of the two springs can be adjusted respectively.

[0045] By providing the screw 631 and a pair of springs and nuts corresponding to the screw 631, the plate 2 62 can perform an axial reciprocating floating motion relative to the plate 1 61, which can further increase the degree of turbulence in the air flow, further promote the uniformity of dispersion of non-methane total hydrocarbons in the air, and can function with the plasma purification unit in a better state.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical concept disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A device for purifying non-methane total hydrocarbons in the air by plasma photolysis, comprising a pre-purification unit arranged at the air inlet of a housing, a duct fan arranged at the air outlet of the housing, and a plurality of plasma purification units arranged alternately along the axial direction in a cylindrical cavity of the housing; characterized in that: It also includes an air distribution plate group fixedly arranged in the cylindrical cavity of the shell and respectively arranged on the upstream side of each plasma purification unit; the air distribution plate group includes a plate 1 and a plate 2, and an axial distance is maintained between the opposite surfaces of the plate 1 and the plate 2; A plurality of through holes are distributed on the surface of plate one and are arranged in a plurality of rows; a plurality of rows of ridges are distributed on the surface of plate two and strip holes are formed between two adjacent rows of ridges; on the same air distribution plate group, each row of through holes on plate one can be opposite to each row of ridges on plate two.

2. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 1, characterized in that: On the plate surface of the second plate, a strip hole is formed on both sides of the root of each ridge bar respectively.

3. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 1 or 2, characterized in that: The transverse cross section of the ridge is triangular in shape and the width at the root of the ridge is smaller than the inner diameter of the through hole.

4. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 1 or 2, characterized in that: The transverse cross section of the strip-shaped hole is in a trapezoidal shape, with the long side facing one side of the plate.

5. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 1 or 2, characterized in that: The transverse cross section of the strip-shaped hole is in the shape of a parallelogram.

6. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 1 or 2, characterized in that: The transverse cross section of the ridge is triangular in shape and the width at the root of the ridge is smaller than the inner diameter of the through hole; The transverse cross section of the strip-shaped hole is in the shape of a parallelogram, and the inclination direction of the two strip-shaped holes located between two adjacent ridges is consistent with the inclination direction of the hypotenuse of the adjacent ridges.

7. The device for purifying non-methane total hydrocarbons in air by plasma photolysis according to claim 1, characterized in that: An annular flange is formed on the end surface of the plate 2 facing the plasma purification unit, and the inner cavity of the annular flange is a contraction cavity; the small diameter end of the contraction cavity faces one side of the plasma purification unit.

8. The device for purifying non-methane total hydrocarbons in air by plasma photolysis according to claim 1, characterized in that: The first plate and the second plate are connected via a plurality of connecting rod groups, and the connecting rod groups are alternately distributed around the circumferential direction.

9. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 8, characterized in that: The connecting rod assembly includes a screw rod, a pair of springs and a pair of nuts; One end of the screw is fixed on the first plate, and the other end passes through the light column through hole provided on the second plate. After the two springs are sleeved on the screw, the two springs are relatively distributed outside the two ends of the light column through hole. The two nuts match the external thread section arranged on the screw rod and the two nuts correspond to the ends of the two springs which are away from the second plate respectively.

10. The device for purifying non-methane total hydrocarbons in the air by plasma photolysis according to claim 9, characterized in that: An annular flange is formed on the end surface of the plate 2 facing the plasma purification unit, and the inner cavity of the annular flange is a contraction cavity; the small diameter end of the contraction cavity faces one side of the plasma purification unit.

Images