KR101936070B1 - Ultraviolet Sterilizer for Wastewater - Google Patents

Abstract

The present invention relates to an ultraviolet sterilizer for wastewater used for sterilizing microorganisms present in treated water. The sterilizer includes: an upper cover (22); a support base (30); a hollow shaft (40); a rotating ring (41); a connecting arm (42); an upper rotation bar (43) and a lower rotation bar (44); a ring gear (52); an internal gear (53); a first planetary gear (60); a second planetary gear (61); a deceleration motor (33); a power transmission mechanism (34); a lamp brush (70); a tank brush (71); a rotating blade (72); a bubble hole (73); and rotational shafts (63, 64, 65). The present invention is to provide the ultraviolet sterilizer for wastewater, which can greatly reduce a space occupied by the sterilizer and maintain light transmittance of a quartz tube continuously.

Description

{Ultraviolet Sterilizer for Wastewater}

The present invention relates to an ultraviolet sterilizing apparatus for sterilizing microorganisms present in treated water, and more particularly, to an ultraviolet sterilizing apparatus for sterilizing microbes existing in treated water by continuously removing a foreign substance adhering to the surface of a quartz tube surrounding an ultraviolet lamp, To an ultraviolet sterilizing apparatus for wastewater.

Recently, the detection of viruses in tap water has worsened the concern of contamination of water that we use. It has been found that the cause of virus is in the final effluent of wastewater treatment plant, so that disinfection treatment of effluent water is strengthened by legislation .

The disinfection of wastewater has been dependent on chlorine so far, but the interaction between organic matter and chlorine in chlorine and effluent has caused the occurrence of THM (Trihalomethane), which is a carcinogen, and the adverse effects of destroying the downstream stream ecosystem due to residual chlorine. The chlorine-based sterilization method has begun to be excluded.

Since the disadvantage of the chlorine sterilization method is that the sterilization method which can replace the chlorine sterilization method has recently been developed and applied to the sewage and wastewater sterilization method using ultraviolet rays, a conventional ultraviolet sterilization apparatus is an ultraviolet The microorganisms in the water are sterilized during the passage through the ultraviolet irradiation area.

Until now, the ultraviolet sterilization method has been evaluated to be environmentally friendly. Ultraviolet rays having a wavelength of 253.7 mm can destroy the DNA of microorganisms and inactivate the microorganisms. have.

However, when the turbidity of the discharged water is high, the reach distance of the ultraviolet ray is reduced, and the adhesion of the foreign matter to the surface of the quartz tube surrounding the ultraviolet lamp rapidly progresses, so that the light transmittance decreases and the sterilization efficiency by ultraviolet rays decreases rapidly .

The ozone sterilization method uses the strong oxidizing power of ozone for the sterilization of microorganisms. Ozone easily destroys the microorganism cell walls by the strong oxidizing power peculiar to the ozone, thereby deactivating the microorganisms.

However, ozone has a higher level of ozone injection rate in the sewage treatment plant or wastewater treatment plant discharge water containing a large amount of organic matter because the reaction with the organic matter precedes the microorganism. Therefore, the sterilizing power is excellent, but the high concentration injection and the operation Safety is not clear and most applications are avoided.

As described above, conventional sterilization methods have advantages and disadvantages, but ultraviolet sterilization is the most widely applied.

In Korean Patent Registration No. 10-0926893, a scraper fitted to the outer circumferential surface of a quartz tube having an ultraviolet lamp is moved along the longitudinal direction of the quartz tube by a driving device such as a cylinder to remove foreign matter adhering to the surface of the quartz tube Conventional techniques have been proposed.

However, since the scraper moves in the longitudinal direction of the quartz tube, the length of the driving device necessarily increases and the space occupied by the device becomes large. In the course of backward movement of the scraper, There is a problem that the quartz tube is again contaminated by the adhered foreign substance.

Korean Patent Registration No. 10-0926893 (Published on Nov. 12, 2009) Korean Registered Patent No. 10-1378733 (Published date 2014.03.27.) Korean Patent Registration No. 10-1721249 (Publication date 2013.030.)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an ultraviolet sterilizing apparatus for wastewater which can greatly reduce the space occupied by the apparatus and maintain the light transmittance of the quartz tube.

In order to accomplish the object of the present invention, there is provided an ultraviolet sterilizer for wastewater, comprising: an upper cover covering an upper portion of a sterilizing tank and having a first through hole at a center thereof; A support provided on an upper surface of the upper cover; A bearing holder mounted at the center of the support; A hollow shaft inserted and supported by an inner ring of a bearing installed in the bearing holder, inserted into the sterilizing tank through the first through hole, and inserted into a quartz tube surrounding the ultraviolet sterilizing lamp; A lower cover installed at a lower portion of the sterilization tank; A conical projection formed at the center of the lower cover so as to coincide with the center of the hollow shaft; A rotating ring supported by the conical projection; A connecting arm connecting the hollow shaft and the rotating ring; An upper rotary bar and a lower rotary bar horizontally formed in the same direction from the hollow shaft and the rotary ring; A sun gear installed at the center of the bottom surface of the upper cover and having a second through hole for passing the hollow shaft therethrough; A ring gear disposed on the bottom surface of the upper cover so as to be concentric with the sun gear and positioned outside the sun gear; An internal gear disposed on a bottom surface of the upper cover so as to be concentric with the ring gear and positioned outside the ring gear; A first planetary gear engaged with the sun gear and rotating simultaneously with revolving by the upper rotating bar; A second planetary gear engaged with the ring gear and rotating simultaneously with revolving by the upper rotating bar; A third planetary gear engaged with the internal gear and rotating simultaneously with revolving by the upper rotating bar; A deceleration motor mounted on a support; A power transmission mechanism for transmitting power from the deceleration motor to the hollow shaft; A lamp brush installed between the upper rotary bar and the lower rotary bar for wiping foreign substances adsorbed on the surface of the quartz tube by revolving along the outer peripheral surface of the quartz tube together with the first planetary gear; A tank brush installed between the upper rotating bar and the lower rotating bar for wiping foreign matter adsorbed on the inner peripheral surface of the sterilizing tank by revolving along the inner peripheral surface of the sterilizing tank together with the third planetary gear; A rotating blade located between the lamp brush and the tank brush and whirling foreign substances adhering to the lamp brush and the tank brush by rotation while revolving together with the second planetary gear and between the upper rotating bar and the lower rotating bar; A bubble hole formed in the rotating blade and generating bubbles in the treated water flowing into the sterilizing tank; And a rotary brush connected to the first planetary gear, the second planetary gear, and the third planetary gear through the upper rotating bar and supporting the lamp brush, the tank brush, and the rotating blade, Feature.

The support base according to the present invention comprises: a base plate having a bearing holder at the center thereof and fixed to the upper cover; A supporter vertically installed on an upper surface of the base plate; And a top plate provided on the upper end of the supporter for supporting the deceleration motor and the quartz tube.

As described above, since the lamp brush 70 that rotates while revolving along the outer circumferential surface of the quartz tube 24 is provided, it is possible to neatly remove the foreign substances adhering to the outer circumferential surface of the quartz tube 24 have.

Since the tank brush 71 that rotates while revolving along the inner circumferential surface of the sterilizing tank 20 is provided in the sterilizing tank 20, the foreign matter adhered to the inner circumferential surface of the sterilizing tank 20 can be cleanly removed.

Since the rotating blade 72 is disposed between the lamp brush 70 and the tank brush 71, the lamp brush 70 and foreign matter adhered to the tank brush 71 can be removed.

A large amount of air bubbles are generated in the process water 27 by the bubble holes 73 when the rotating blades 72 are rotated so that the foreign substances adhered to the lamp brushes 70 and the tank brushes 71 are bubbled So that it can be promoted.

Since the rotary ring 41 connected to the lower end of the connection arm 42 is supported by the conical protrusion 26 formed at the center of the lower lid 25 to keep the center of the rotary lid 41, There is an effect that it can be prevented.

The lamp brush 70 and the tank brush 71 rotate in opposite directions to each other so that the first planetary gear 60 and the second planetary gear 61 and the third planetary gear 62 rotate in a direction The frictional force is increased and the force can be further increased.

1 is a partial cutaway perspective view
Fig. 2 is a perspective view showing the inside of the sterilization tank,
Figure 3 is a perspective view of gears and brushes according to the present invention;
4 is a perspective view showing a hollow shaft, a connecting arm and a rotating ring according to the present invention;
Figure 5 is a perspective view of a rotating blade according to the present invention;
Figure 6 is a perspective view of a support and bearing holder according to the present invention;
7 is a cross-sectional view
8 is an enlarged view of the main part of Fig. 7
9 is an enlarged view of part A in Fig. 7
10 is a plan view showing the gears according to the present invention.
11 is a plan view showing a lamp brush, a tank brush and a rotating blade according to the present invention.

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

As shown in FIGS. 1 to 11, the present invention includes an upper cover 22 covering an upper portion of a sterilizing tank 20 and having a first through hole 21 formed at the center thereof; A support base 30 provided on the upper surface of the upper lid 22; A bearing holder 31 installed at the center of the support base 30; Is inserted into and supported by the inner ring of the bearing 32 provided in the bearing holder 31 and inserted into the sterilization tank 20 through the first through hole 21 and inserted into the quartz tube 23 surrounding the ultraviolet sterilizing lamp 23 And a hollow shaft 40 into which the shaft 24 is inserted.

An inlet 20a for introducing the treatment water 27 is provided at one side of the outer peripheral surface of the sterilizing tank 20 and an outlet 20b for discharging the treated water 27 is provided at the other side of the outer surface of the sterilizing tank 20 do.

A flange 28 for fixing the upper lid 22 is welded to the upper end of the sterilizing tank 20 and the upper lid 22 and the flange 28 are fastened to the bolts 83 and nuts 84).

The quartz tube 24 is fixed to the support 30 by means of a socket 29 as shown in Figure 8. To this end, the upper end of the quartz tube 24 is inserted into the socket 29, The center of the hole of the through hole 37h formed in the upper plate 37 of the socket 29 is formed coincident with the center of the hollow shaft 40 and the socket 29 is inserted into the through hole 37h. The welding plate 29a is welded and fixed to the upper plate 37 in a state in which the welding plate 29a in the form of a disk formed on the outer circumferential surface is in close contact with the upper plate 37. [

A nipple 23a having a screw thread is provided at the upper end of the ultraviolet sterilizing lamp 23 located at the center of the inner side of the quartz tube 24 and a burring nut 29b is formed at the center of the socket 29, 23 is inserted into the quartz tube 24 and then the nipple 23a is coupled to the burring nut 29b to exchangeably install the ultraviolet sterilizing lamp 23 on the quartz tube 24. [

The present invention includes a lower cover (25) installed at a lower portion of the sterilizing tank (20); A conical protrusion 26 formed at the center of the lower lid 25 so as to coincide with the center of the hollow shaft 40; A rotary ring 41 supported by the conical projection 26; A connecting arm 42 connecting the hollow shaft 40 and the rotary ring 41; And an upper rotation bar 43 and a lower rotation bar 44 formed horizontally in the same direction from the hollow shaft 40 and the rotation ring 41, respectively.

The lower lid 25 is welded to the lower end of the sterilization tank 20 and the rotary ring 41 is rotated in contact with the conical projection 26 as shown in Figs. The rotary ring 41 is integrally connected to each other by the connection arm 42 so that the rotary ring 41 is also rotated simultaneously when the hollow shaft 40 is rotated.

9, a stopper 24a is provided at the lower end of the quartz tube 24, and the lower end of the ultraviolet sterilizing lamp 23 located inside the quartz tube 24 is also provided at the center of the stopper 24a So that the quartz tube 24 and the ultraviolet sterilizing lamp 23 are concentrically arranged.

A conical groove 24b corresponding to the conical protrusion 26 is formed at the bottom center of the plug 24a so that the quartz tube 24 can be supported by the conical protrusion 26 while keeping the center thereof.

A sun gear (50) installed at the center of the bottom surface of the upper lid (22) and having a second through hole (51) for passing the hollow shaft (40); A ring gear 52 disposed on the bottom surface of the upper lid 22 so as to be concentric with the sun gear 50 and positioned outside the sun gear 50; And an internal gear 53 disposed on the bottom surface of the upper lid 22 so as to be concentric with the ring gear 52 and positioned outside the ring gear 52.

The sun gear 50 and the ring gear 52 and the internal gear 53 concentric with each other at intervals as shown in Figs. 2, 3, 8 and 10 are connected to the wrench bolts 80, 81 The ring gear 52 is coupled to the wrench bolt 81 passing through the base plate 35 formed on the support base 30. The ring gear 52 is fixed to the bottom plate of the upper lid 22 by the bolts 81,

As shown in Fig. 10, the sun gear 50 and the ring gear 52 are external gears, and the internal gear 53 is formed with teeth along the inner peripheral surface.

The present invention includes: a first planetary gear (60) engaged with a sun gear (50) and rotating simultaneously with revolving by an upper rotating bar (43); A second planetary gear 61 engaged with the ring gear 52 and rotating simultaneously with revolving by the upper rotating bar 43; And a third planetary gear 62 that meshes with the internal gear 53 and rotates at the same time while revolving by the upper rotation bar 43.

The first planetary gear 60, the second planetary gear 61 and the second planetary gear 61 are both installed on the upper rotation bar 43 as shown in Figs. 2, 3, 8 and 10 And simultaneously revolves in the same direction along the upper rotating bar 43. [

The first planetary gear 60 and the second planetary gear 61 are engaged with the sun gear 50 and the ring gear 52 which are external gears, 3 planetary gear 62 in the opposite direction.

The lamp brush 70 and the sterilizing tank 20 which are in contact with the outer circumferential surface of the quartz tube 24 although the rotational directions of the first and second planetary gears 60 and 62 are opposite to each other, The tank brush 71 which is in contact with the inner circumferential surface of the upper rotating bar 43 rotates in the same direction as the revolving direction in which the upper rotating bar 43 rotates.

The present invention includes a deceleration motor (33) installed on a support base (30); And a power transmission mechanism (34) for transmitting power from the deceleration motor (33) to the hollow shaft (40).

6 and 8, the decelerating motor 33 is installed on the motor fixing portion 37a extending in the horizontal direction from one side of the upper plate 37 of the support 30, (33) is fixed to the motor fixing portion (37a).

The power transmission mechanism 34 includes a drive pulley 39a provided on the motor shaft 33a and a driven pulley 39b provided on the hollow shaft 40 as shown in Figs. 3 and 8, for example. And a belt 38 wound around the drive pulley 39a and the driven pulley 39b.

At this time, the hollow shaft 40 may be inserted into the center of the driven pulley 39b, and then the hollow shaft 40 and the driven pulley 39b may be welded to each other.

The present invention wipes foreign matter adsorbed on the surface of the quartz tube 24 by rotating while revolving along the outer circumferential surface of the quartz tube 24 together with the first planetary gear 60, A lamp brush 70 installed between the lamp brushes 44; The foreign matter adsorbed on the inner peripheral surface of the sterilizing tank 20 is wiped off by revolving along the inner circumferential surface of the sterilizing tank 20 together with the third planetary gear 62 and the upper rotating bar 43 and the lower rotating bar 44 are rotated, And a tank brush 71 which is installed between the tank brushes 71 and 72.

The lamp brush 70 and the tank brush 71 may be made of, for example, synthetic fibers having an elastic restoring force, and may be installed in a brushed form on the outer peripheral surface of the tubes 70a and 71a as shown in FIG. 8 .

The present invention is characterized in that foreign matter adhering to the lamp brush 70 and the tank brush 71 is rotated by revolving while revolving together with the second planetary gear 61 and being located between the lamp brush 70 and the tank brush 71 A rotating blade 72 installed between the upper rotating bar 43 and the lower rotating bar 44; And a bubble hole 73 formed in the rotating blade 72 and generating bubbles in the treated water 27 flowing into the sterilizing tank 20. [

The rotating blade 72 can be radially formed on the outer circumferential surface of the tube 72a as shown in Fig. 5 and the bore hole 73 punctured in the rotating blade 72 can be rotated Bubbles are generated in the treatment water 27 so that the lamp brush 70 and the foreign substance adhered to the tank brush 71 are removed by bubbles.

The present invention is provided between the upper rotating bar 43 and the lower rotating bar 44 to support the lamp brush 70, the tank brush 71 and the rotating blade 72 respectively and to penetrate the upper rotating bar 43 64 and 65 connected to the first planetary gear 60, the second planetary gear 61 and the third planetary gear 62, respectively.

The rotary shafts 63, 64 and 65 are inserted in the holes formed in the upper rotary bar 43 and the lower rotary bar 44 as shown in Figs. 4 and 8 and are supported parallel to each other, The upper ends of the first planetary gears 63, 64 and 65 are passed through the upper rotation bar 43 and coupled to the centers of the first planetary gear 60, the second planetary gear 61 and the third planetary gear 62.

The upper and lower ends of the rotating shafts 63, 64 and 65 are pressure-molded in a rivet head shape to prevent the rotating shafts 63, 64 and 65 from being separated.

A support base (30) according to the present invention comprises: a base plate (35) having a bearing holder (31) at the center and fixed to an upper lid (22); A supporter 36 vertically installed on the upper surface of the base plate 35; And an upper plate 37 provided at the upper end of the supporter 36 and supporting the deceleration motor 33 and the quartz tube 24. [

6, the through holes 37h formed in the upper plate 37 are formed to coincide with the center of the base plate 35 provided on the bearing holder 31 in the vertical direction, and the upper plate 37 and the supporter 37, (36), the bearing holder (31), and the base plate (35) are welded to each other.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

8, when the treatment water 27 flows into the sterilization tank 20 through the inlet 20a in the state that the ultraviolet sterilizing lamp 23 is lighted, And the bacteria remaining in the treated water 27 are sterilized by the ultraviolet rays transmitted through the quartz tube 24.

As the time elapses, the quartz tube 24 immersed in the treated water 27 filled in the sterilization tank 20 becomes contaminated with the foreign substances contained in the treated water 27, and ultraviolet transmittance gradually decreases, The efficiency is lowered.

At this time, when an energizing current is supplied to the outer peripheral surface of the quartz tube 24 and the inner peripheral surface of the sterilizing tank 20 and the decelerating motor 33 is rotated to rotate the decelerating motor 33, The driven pulley 39a is rotated and the rotational force is transmitted to the driven pulley 39b through the belt 38 and the hollow shaft 40 is rotated.

At this time, the hollow shaft 40 is rotated while being supported by the base plate 35 provided on the bearing holder 31, and is simultaneously rotated with the rotary ring 41 connected by the connection arm 42, 9, since the lower cover 25 is supported by the conical protrusion 26 formed at the center of the lower cover 25, the center can not be displaced.

10, the first planetary gear 60 and the second planetary gear 60, which are provided on the upper rotation bar 43 which is rotated together when the hollow shaft 40 and the rotary ring 41 are rotated, 61 and the third planetary gear 62 are revolved by the upper rotating bar 43.

At this time, since the first planetary gear 60, the second planetary gear 61, and the third planetary gear 62 are engaged with the sun gear 50, the ring gear 52, and the internal gear 53, The lamp brush 70 and the tank brush 71 and the rotating blade 72 connected to each other through the rotating shafts 63, 64 and 65 are rotated by the first planetary gear 60, the second planetary gear 61, So that the third planetary gear 62 is rotated in the rotating direction.

In this process, the lamp brush 70 is rotated while being in contact with the outer peripheral surface of the quartz tube 24, and the tank brush 71 is rotated while being in contact with the inner peripheral surface of the sterilizing tank 20, And the foreign substances adhering to the inner peripheral surface of the sterilizing tank 20 are removed from the surface.

The rotating blade 72 positioned between the lamp brush 70 and the tank brush 71 functions to remove and regenerate the foreign materials attached to the lamp brush 70 and the tank brush 71, A large amount of air bubbles are generated in the treated water 27 by the bubble holes 73 formed in the rotating blade 72. When foreign substances attached to the lamp brushes 70 and the tank brushes 71 meet or bubble, It acts to promote withdrawal.

The bubbles generated by the bubble holes 73 when the rotating blade 72 is rotated mainly serve to remove foreign substances adhering to the lamp brush 70 and the tank brush 71, Or organic matter is attached and trapped by the droplet effect to float to the surface of the water, thereby separating it from the treated water.

20: sterilization tank 20a: inlet
20b: Outlet port 21: First through hole
22: upper cover 23: ultraviolet sterilizing lamp
23a: Nipple 24: Quartz tube
24a: cap 24b: conical groove
25: lower cover 26: conical projection
27: Waste water 28: Flange
29: socket 29a: welding plate
29b: burring nut 30: support
31: bearing holder 32: bearing
33: Deceleration motor 33a: motor shaft
34: Power transmission mechanism 35: Base plate
36: supporter 37: top plate
37a: motor fixing portion 37h: through hole
38: Belt 39a: Driving pulley
39b: driven pulley 40: hollow shaft
41: rotating ring 42: connecting arm
43: upper rotating bar 44: lower rotating bar
50: sun gear 51: second through hole
52: ring gear 53: internal gear
60: first planetary gear 61: second planetary gear
62: third planetary gears 63, 64, 65:
70: lamp brush 71: tank brush
72: rotating blade 70a, 71a, 72a:
73: bubble hole 80, 81, 82: wrench bolt
83,85: Bolt 84: Nut

Claims (2)

An upper cover (22) covering the upper portion of the sterilizing tank (20) and having a first through hole (21) formed at the center thereof;
A support base 30 installed on the upper surface of the upper lid 22;
A bearing holder 31 installed at the center of the support 30;
Is inserted into the inner ring of the bearing 32 provided in the bearing holder 31 and is inserted into the sterilizing tank 20 through the first through hole 21 and the ultraviolet sterilizing lamp 23 A hollow shaft 40 into which the surrounding quartz tube 24 is inserted;
A lower cover 25 installed below the sterilizing tank 20;
A conical protrusion 26 formed at the center of the lower lid 25 so as to coincide with the center of the hollow shaft 40;
A rotary ring 41 supported by the conical projection 26;
A connecting arm 42 connecting the hollow shaft 40 and the rotary ring 41;
An upper rotation bar 43 and a lower rotation bar 44 horizontally formed in the same direction from the hollow shaft 40 and the rotation ring 41;
A sun gear (50) installed at the center of the bottom surface of the upper lid (22) and having a second through hole (51) for passing the hollow shaft (40);
A ring gear (52) disposed on the bottom surface of the upper lid (22) so as to be concentric with the sun gear (50) and positioned outside the sun gear (50);
An internal gear (53) disposed on the bottom surface of the upper lid (22) so as to be concentric with the ring gear (52) and positioned outside the ring gear (52);
A first planetary gear (60) engaged with the sun gear (50) and rotating simultaneously with revolving by the upper rotating bar (43);
A second planetary gear (61) engaged with the ring gear (52) and rotating simultaneously with revolving by the upper rotating bar (43);
A third planetary gear (62) engaged with the internal gear (53) and rotating simultaneously with revolving by the upper rotating bar (43);
A decelerating motor 33 installed on the support 30;
A power transmission mechanism (34) for transmitting power from the deceleration motor (33) to the hollow shaft (40);
The first rotating gear 43 rotates together with the first planetary gear 60 along the outer circumferential surface of the quartz tube 24 to wipe away the foreign matter adsorbed on the surface of the quartz tube 24, A lamp brush 70 installed between the rotating bars 44;
The first rotating bar 43 and the lower rotating bar 43 are rotated together with the third planetary gear 62 while revolving along the inner circumferential surface of the sterilizing tank 20 to wipe off the foreign substances adsorbed on the inner circumferential surface of the sterilizing tank 20, A tank brush 71 provided between the rotary bars 44;
And the foreign matter adhered to the lamp brush 70 and the tank brush 71 by rotation while revolving together with the second planetary gear 61 and being positioned between the lamp brush 70 and the tank brush 71, A rotary blade 72 installed between the upper rotating bar 43 and the lower rotating bar 44;
A bubble hole 73 formed in the rotating blade 72 and generating bubbles in the treated water 27 flowing into the sterilizing tank 20;
The upper rotating bar 43 and the lower rotating bar 44 support the lamp brush 70, the tank brush 71 and the rotating blade 72 respectively. The upper rotating bar 43 Rotation shafts 63, 64 and 65 connected to the first planetary gear 60, the second planetary gear 61 and the third planetary gear 62, respectively,
And an ultraviolet ray sterilizing device for wastewater. The method according to claim 1,
The support base (30)
A base plate 35 provided with the bearing holder 31 at the center thereof and fixed to the upper lid 22;
A supporter 36 vertically installed on an upper surface of the base plate 35;
An upper plate 37 installed at an upper end of the supporter 36 to support the decelerating motor 33 and the quartz tube 24;
And an ultraviolet ray sterilizing device for wastewater.

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