KR200207225Y1 - Photocatalytic multiple reactor - Google Patents

Abstract

The present invention relates to a device for purifying exhaust gases and wastewater, such as SOx, NOx, and volatile organic compounds (VOCs), which are harmful to humans, generated in factories and automobiles. Maximize the photolysis efficiency by increasing the contact area with and maximize the amount of UV rays delivered to the photocatalyst and eliminate the additional processes such as the recovery process of the photocatalyst powder used for wastewater treatment. For that purpose.

To this end, the present invention is a) after coating the photocatalyst Titania (TiO2) sol and silica sol on the surface of the quartz rods (5, 105), and then firmly binds the titania and silica to the surface of the quartz rod in the ultrafine state by heat treatment. , B) The quartz rods 5 and 105 have a diameter of 5 to 30 mm to withstand the pressure caused by the flow of wastewater, and one end surface 21 is mirror-polished. 5 and 105 are distributed in the form of radiation around the ultraviolet lamps 4 and 104 such that the photocatalysts 22 and 23 coated on the quartz rod occupy the largest area. The photocatalyst is also coated on the quartz tubes 11 and 111 and the jig 7, which are installed in the vicinity of 4 and 104, and is designed to maximize the photolysis efficiency by utilizing the ultraviolet rays to the maximum.

Thus, the photocatalytic efficiency is enhanced by the photocatalyst coated on the jig or quartz tube around the ultraviolet lamp and the photocatalytic action of photocatalytic by the photocatalyst coated on the quartz rod to increase the efficiency of the photocatalyst. By increasing the volume and eliminating ancillary processes such as the recovery of uncoated photocatalyst powder, the purifier can be operated simply and conveniently, so that clean air and water can be easily and efficiently maintained to maintain a pleasant environment.

Description

Photocatalytic Multiple Reactor using Photocatalyst

The present invention relates to an apparatus for purifying exhaust gases and wastewater, such as SOx, NOx, and volatile organic compounds (VOCs), which are harmful to humans generated in factories and automobiles. In more detail, a device and a method for manufacturing a multiple purification of the exhaust gas and waste water by installing a quartz catalyst and a jig coated with a photocatalyst in a part of the exhaust line of the exhaust gas and waste water and irradiated with ultraviolet rays. It is about.

There are three ways to decompose harmful gases using photocatalysts.

(1) Method of Decomposing Hazardous Gases in Powder Form: Paper published by Dibbe Dibbe, L.A., Raupp, G. B., Catal. As shown in Letters, 4, p. 345 (1990), the powder is placed in a reactor and irradiated with ultraviolet rays around the reactor to purify the harmful gas passing through the reactor. There is a disadvantage that a separate device for recovering the powder is required.

(2) Coating of powder on Honeycomb ceramics: Honeycomb ceramics as shown in Sauer, ML, Ollis, DF, J. Catal., 149, p.81 (1994) published by Sauer. It is a device that cleans harmful gases passing through it while irradiating UV light around it. It has the advantage of excellent photolysis efficiency, but the photocatalyst that causes photolysis is limited to only the area adjacent to the UV lamp, so it is photocatalyst except for UV lamp. There is a disadvantage that can not maximize the photolysis efficiency because it does not function.

(3) Method of coating the powder inside the glass tube: Paper published by Alberci and Jardin Alberich, R. M., Jardin W. F., Applied Catal. B .: As described in Environ, 14, p.55 (1997), is a device that cleans the harmful gases that pass through the irradiation of ultraviolet rays by coating the photocatalyst powder inside a tube made of glass and installing an ultraviolet lamp at its center. It has a high photolysis rate and maintains a fairly stable operating state. However, this system also has a disadvantage that photolysis is performed only by a photocatalyst coated inside the glass tube, so that the area of contact with the gas is reduced, thereby maximizing the photolysis efficiency.

Therefore, many attempts have been made to increase the photodegradation efficiency by distributing the photocatalyst coated portion over a large area as much as possible. Related arts are disclosed in US Pat. No. 5,875,384.

The patent publication forms a cable by coating a photocatalyst on an optical fiber, fixes it in a groove formed in a spacer, mirrors one end of the optical fiber, and then decomposes it by flowing exhaust gas or wastewater while irradiating ultraviolet rays thereto. The poem uses a method. According to this method, since the photocatalyst coated on the optical fiber is distributed over a large area, the photocatalyst has a high value almost equal to the efficiency in the photocatalyst powder suspension having the highest photolysis efficiency. However, this method requires a difficult process in which a plurality of optical fibers are collected and inserted into the spacer grooves in order to make a thin diameter optical fiber into a cable, and the ultraviolet light participating in the photocatalyst by applying ultraviolet light to one end of the optical catalyst coated optical fiber is a photocatalyst. Since only the ultraviolet rays scattered from the inside are used, the total amount of photolysis is not so high, and the strength is rather low due to the gathering of thin optical fibers made of cables.

Therefore, the main object of the present invention is to remove the cumbersome recovery process by fixing the photocatalyst to the base material by a coating method as described above, to maximize the light efficiency by distributing the photocatalyst as widely as possible in the reactor and efficiently using ultraviolet rays. In addition, the base metal coated with a photocatalyst has sufficient strength to withstand the hydraulic pressure of wastewater, and to provide a method for an exhaust gas and wastewater treatment device that is easy to manufacture.

1 is a cross-sectional view of a multi-cleaning apparatus using a photocatalyst according to a first embodiment of the present invention

2 is a side view of the multi-cleaning apparatus using the photocatalyst shown in FIG.

3a is a cross-sectional view of the primary jig for fixing the quartz rod shown in FIG.

3b is a cross-sectional view of the secondary jig for fixing the quartz rod shown in FIG.

4 is a schematic diagram showing the process of refraction and scattering of ultraviolet rays in a quartz rod coated with a photocatalyst

5 is a cross-sectional view of a multi-cleaning apparatus using a photocatalyst according to a second embodiment of the present invention.

6 is a front view of the multi-cleaning apparatus using the photocatalyst shown in FIG.

Explanation of symbols on the main parts of the drawings

1, 101.Exhaust gas and wastewater exhaust pipe 2 ... Jig for fixing ultraviolet lamp

3.Jig for fixing the quartz bar set 4.104 ... UV lamp

5, 105 ... Photocatalyst coated quartz rod 6, 106 ... Quartz fixing fasteners

7 ... The primary jig for fixing the quartz rod 7a ... The primary jig for fixing the quartz rod

7b ... Secondary jig for fixing quartz rod 8 ... Secondary jig for fixing quartz rod

9 ... 1st quartz rod set 10 ... 2nd quartz rod set

11, 111 ... Quartz 16 ... Home with quartz rod

17.Exhaust gas and wastewater passage groove 21 ... Front faced quartz rod

22 ... Silica 23 ... Titania

24 ... refractive ultraviolet rays 25 ... scattered ultraviolet rays

31.Inlet 32 ... Outlet

In order to achieve the above object, the present invention is a) after the coating of ultrafine titania and silica sol having a size of 10 to 1,000 nm on the surface of the quartz rod, and then hardening the titania and silica to the surface of the quartz rod in an ultrafine state by heat treatment. B) The quartz rods have a diameter of 5 to 30 mm to withstand the pressure caused by the flow of the wastewater and are mirror-treated on one end face. C) The quartz rods are in the form of radiation around the ultraviolet lamp. The photocatalyst coated on the quartz rod occupies the largest area, and d) The photocatalyst is coated on the quartz tube or jig installed in the vicinity of the ultraviolet lamp. It is designed to maximize the photolysis efficiency.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing the concept of a multi-cleaning apparatus using a photocatalyst according to a first embodiment of the present invention, in which a UV lamp 4 is installed perpendicular to the exhaust pipe in a cylindrical exhaust pipe. (A) After coating ultrafine titania and silica sol having a size of 10 to 1,000 nm on the surface of the quartz rod (5), the titania and silica are firmly bonded to the surface of the quartz rod in an ultrafine state by heat treatment, and Quartz rod (5) has a diameter of 5 ~ 30mm to withstand the pressure caused by the flow of waste water and is mirrored on one end surface, c) The quartz rod (5) before and after the ultraviolet lamp (4) (2) A total of two sets of quartz rod faces 21, mirror-treated in a state of being fixed by the quartz rod fixing jig 7 and 8, are set close to the ultraviolet lamp, one set each. A photocatalyst is coated on the upper part of the primary jig for fixing the quartz rod 7a, which is installed in the position closest to the ultraviolet lamp 4 among the lamps 7 and 8, and e) A quartz tube for protecting the ultraviolet lamp 4 above. (11) The photocatalyst is also coated on the surface.

Referring to the operation of the present invention configured as described above are as follows.

Exhaust gas and waste water enter the primary quartz rod set 9 through the groove 17 without the quartz rod inserted in the groove formed in the secondary jig 8 for fixing the quartz rod and coated on the surface of the quartz rod 5. While being adsorbed by the photocatalysts 22 and 23, the photocatalyst is photolyzed by the ultraviolet lamp 4 transmitted through the quartz rod. For fixing the quartz rods installed before and after the ultraviolet lamp 4, the exhaust gas and waste water are discharged from the primary quartz rod set through the grooves 17 into which the quartz rods are not inserted among the grooves formed in the primary rods 7 for fixing the quartz rods. The photocatalyst is again decomposed by the photocatalyst coated on the upper part of the first jig 7a. In addition, the photocatalyst is coated on the quartz tube 11 protecting the ultraviolet lamp 4 to photoly decompose the exhaust gas and the wastewater. In this case, the undecomposed material is moved to the secondary glass rod set and finally photoly decomposed by the photocatalyst coated on the quartz rod.

Therefore, the photocatalyst is coated on the quartz rod, the jig and the quartz tube as described above, and is distributed in the reaction space between the ultraviolet lamp and the exhaust pipe to the maximum. Therefore, the treatment capacity of the purification device can be improved.

FIG. 5 is a cross-sectional view illustrating the concept of a multiple cleaning device using a photocatalyst according to a second embodiment of the present invention, in which an ultraviolet lamp 104 is installed in a cylindrical exhaust pipe in parallel with the exhaust pipe. The photocatalyst is coated on the outer diameter portion of the ultraviolet lamp 104 installed in parallel with the exhaust pipe 101 and the quartz tube 111 provided outside the ultraviolet lamp, and the quartz rod 105 is disposed outside the quartz tube 111. ) Is fixed to the exhaust pipe while being distributed in a radiation shape, and the quartz rod 105 is coated with a photocatalyst and the surface facing the ultraviolet lamp 104 is mirror-treated to efficiently transmit ultraviolet rays into the quartz rod. It is supposed to be.

Referring to the operation of the present invention configured as described above are as follows.

The exhaust gas and waste water enter the reactor through the inlet 31 and are adsorbed by the photocatalyst coated on the quartz rod 105 and the quartz tube 111, and the photocatalyst is activated by the ultraviolet lamp 104, and thus the exhaust gas. And wastewater are photolyzed. The photocatalyst is distributed as wide as possible with respect to the space of the reactor, thereby increasing the amount of adsorption and photolysis by the photocatalyst. Since the photodegradation effect is also affected by the intensity of ultraviolet rays, when the photocatalyst is coated inside the exhaust pipe to cause photolysis, the photodegradation performance is not so high. In the present invention, the photocatalyst is not coated on the inner diameter of the exhaust pipe.

Therefore, the photocatalyst is coated on the quartz tube and coated on the quartz rod distributed in the form of radiation around the quartz tube, thus maximally distributing it in the reaction space between the ultraviolet lamp and the exhaust pipe. It can be treated in large quantities to improve the treatment capacity of the purifier.

4 shows a schematic diagram of a quartz rod coated with a photocatalyst that plays a key role in the present invention. The ultrafine titania sol and the silica sol having particle sizes within 10 to 1,000 nm were mixed at a ratio of 99.9: 0.1 to 50:50, and the mixed sol solution was stirred well to make a uniform solution. The dip coating method was used to slowly pull up at a constant speed. The coated quartz rod is dried at a temperature of 50 to 150 ° C. and heat-treated again at a temperature of 200 to 800 ° C. so that the coated photocatalyst is firmly bonded to the quartz rod of the base material.

Compared to the conventional method mentioned above, when the quartz rod and jig coated with a photocatalyst are installed on a part of the exhaust gas and the wastewater exhaust line and the apparatus for purifying the exhaust gas and the wastewater is irradiated with ultraviolet rays. The following advantages can be obtained. (1) As mentioned above, since the coating is used without using the photocatalyst in the powder state, it is convenient and convenient to use because there is no need to separately collect the powder in the process of purifying exhaust gas and wastewater. 2) Photocatalysts come into contact with exhaust gas and wastewater in multiple areas in a larger area, resulting in superior photolysis characteristics, which increases the amount of exhaust gas and wastewater being purified. (3) Insert quartz rods into quartz rod fixing jig. Since the simple principle of fixing is used, the device can be manufactured relatively easily, and (4) the quartz rod is thick, so it is an excellent exhaust gas and wastewater multiple clean device that maintains high strength.

Claims (2)

In the multiple clean device of the exhaust gas and wastewater using a photocatalyst, Exhaust pipe 1 of exhaust gas and wastewater, ultraviolet lamp 4 provided in a predetermined portion in the exhaust pipe, and quartz rod 5 located at the front and rear of the lamp, the surface 21 near the ultraviolet lamp. The photocatalyst is coated on the surfaces of all partially quartz rods (22, 23), and the surface 21 of the portion close to the ultraviolet lamp (4) is a quartz rod (5) which is mirror-processed to efficiently transmit ultraviolet rays. And a primary jig 7 and a secondary jig 8 for supporting a quartz bar having a plurality of grooves 16 and 17 formed thereon to fix the quartz bar 5 in bundles, and the jig 7, 8) A photocatalyst is coated on the upper side of the primary jig for supporting the quartz rod 7a, which is a surface close to the ultraviolet lamp, and the primary jig for supporting the quartz rod, which is not coated with the photocatalyst, on the surface farther from the ultraviolet lamp. , Located far from UV lamp, supports quartz rod without photocatalyst Jig for fixing the quartz rod set located between the noxious gas exhaust pipe 1 and the primary and secondary jigs 7 and 8 for fixing the secondary jig 8 and the primary and secondary jigs 7 and 8. 3) and a multiple cleaning device using a photocatalyst comprising a quartz rod fixing fastener 6 for fixing the quartz rod 5 to the primary and secondary jigs 7 and 8. The cylindrical exhaust pipe 101 of the exhaust gas and the wastewater, the circular groove 106 formed to insert the quartz rod 105 in the form of radiation in the inner diameter of the exhaust pipe 101, and the The quartz rod 105 coated with the photocatalyst fixed to the circular groove 106 and one end surface of the quartz rod 105 are mirror-treated, and an ultraviolet lamp 104 provided at the central portion of the exhaust pipe 101. ), And a multi-cleaner using a photocatalyst made of a quartz tube 111 coated with a photocatalyst installed on the outside of the ultraviolet lamp 104