Description:Field of the invention

The present invention relates generally to a fluid treatment and more specifically, to an ultraviolet disinfection system for fluids.

Background of the invention

The ultraviolet (UV) radiation is commonly used method for disinfection of fluids, for example water. It is a chemical free method and entirely depends upon the UV intensity. Several UV devices and systems are designed to treat fluids but these devices/systems have limitations like loss of UV radiation and reduction of UV dosage.

Efforts are seen in the prior art to provide systems for treatment of liquids. Reference may be made to US6454937B1 and US5200156A which relate to irradiating flowing fluids with UV light in a direction along the flowing path, to maximize the efficiency of the UV energy and to minimize the absorption of UV light by the walls of vessels or pipes which contain the irradiated fluid. For this purpose, UV light sources are arranged according to said patents to emit maximum energy in a direction parallel to the axis of a pipe (or pipes) through which flows the fluid.

Another US patent US7683344B2 describes a system for treatment of liquids and/or gases with UV radiation. In the system, a transparent tube is used for flow of liquid and the tube is fitted inside a metal or plastic chamber with an air gap in between the two. It further describes the provision of at least one transparent window to this chamber to allow the UV light from an external source to enter the chamber to irradiate the liquid. Due to the refractive indices of liquid quartz tube and air surrounding the quartz tube, total internal reflection takes place to keep most of the light energy inside the transparent tube that has incident angle greater than the critical angle required for Total Internal Reflection (TIR). At some angles the light will remain trapped inside the wall and will travel through the walls of the tube whereas for some angles less than the critical angle light will be transmitted outside the tube in the air surrounding the tube. This radiation will be utilized for disinfection of the surrounding air. Thus, the described system results in the treatment of both liquid and air. However, though the system makes use of total internal reflection for improving the UV dosage for disinfecting the liquid inside the fused silica tube, but it cannot prevent the losses of UV radiation with an incident angle less than critical angle. This UV radiation is utilized for disinfection of air in the gap between the vessel and the fused silica tube. In this case, again from the liquid disinfection point of view the UV dosage gets limited improvement. Also, in this case the UV source is completely isolated from the liquid flowing through the system and hence reflector is required to increase the utilization of UV radiation.

Another US patent US7169311B2 describes a device which is used for disinfection of water in a flow tube where the flow tube itself acts as a fluid filed light guide for the UV radiation and the UV radiation flows through the flow tube by means of total internal reflection. According to first embodiment the device needs to have at least one inlet and one outlet both on the same side. In this device the inlet tube and the outlet tube both need to be separated by air gap or vacuum to get the effect of TIR. In this case the incident radiation with less than critical angle (based on refractive index of the materials) will escape the inlet guide tube but will be utilized for disinfecting the fluid in the outer tube moving towards the outlet. In the second embodiment the inlet and outlet can be on the opposite side of the device with the inlet fluid flowing tube needs to be made up of quartz or fused silica and is covered with metallic vessel having highly reflective mirror finished aluminium coating and an air gap created between outer metal vessel and the fused silica tube. In this case the incident radiation with lower than the critical angle refracted through the quartz in the air gap and is again reflected by the coated surface in the fused silica tube. However, this patent makes use of two kinds of devices. The first device has a restriction of having both inlet and outlet on one side of the vessel to eliminate the losses of the UV radiation with incidence angle less than the critical angle. In the second device this limitation cannot be avoided, but it is reduced to some extent by highly reflective coating on the inner wall of the vessel. Still there will be some loss due to the air gap between the fused silica tube and the vessel.

Thus, the deficiencies in the existing systems are:
1) The UV dosage reduces due to absorption of vessel wall.
2) The UV dosage reduces due to loss of UV radiation with an incidence angle less than critical angle when TIR is used.
3) The devices to reduce the above loss require the inlet and outlet on same side of the device.

Therefore, there exists is a need to provide a system for fluid disinfection that has improved UV dosage with the help of optical reflections and a special coating. Further, there is a need to provide a system for the treatment/disinfection of fluids that flow through the system and also used as an inline system such that the fluid/liquid inside does not change the flow direction thereby allowing the maximum UV dosage to be delivered to the fluids. Accordingly, there exists a need to provide an ultraviolet disinfection system for fluids that overcomes the above-mentioned drawbacks of the prior art.

Objects of the invention

An object of the present invention is to make use of total internal reflection for improvement in the UV dosage along with an external coating provided on an external surface of a quartz tube. The external coating further improves the UV dosage (improved due to TIR) provided to the fluid.

Another object of the present invention is to provide flexibility in terms of converting a system from an inline (flowing) fluid treatment system to an offline (stagnated) reaction chamber.

Another object of the present invention is to improve UV dosage with the help of total internal reflection and additional highly UV reflective coating on the quartz tube.

Yet another object of the present invention is to provide a quartz tube having a partially coated surface area.

One more object of the present invention is to improve the UV dosage with a pre-defined position of the coated area of the quartz tube and the optimized length of the coating along the length of the quartz tube or along the flow of fluid.

Still another object of the present invention is to provide a system that is controlled by a controller that takes feedback from sensors fitted in at least one of the three parts of the system for providing optimized UV dosage based on UV intensity of the lamp, UV Transmittance (UVT) of the fluid and the flow rate of the fluid.

Summary of the invention

Accordingly, the present invention provides an ultraviolet disinfection system (hereinafter, “the system”) for fluids. The system comprises a pair of first modular parts and a second modular part. Each first modular part includes a flanged cylinder. The flanged cylinder is a metallic or a non-metallic (UV resistant) flanged cylinder. Each flanged cylinder includes a quartz tube fitted inside therein. Particularly, the quartz tube is fitted using a U seal and a flat seal creating an air gap in between the quartz tube and the flanged cylinder. The fluid flows along the direction of an axis of the quartz tube. In accordance with the present invention, an outer surface of the quartz tube is partially coated with highly reflective coating and coating length of the quartz tube is optimized for improving the UV dosage.

The second modular part is fitted in between the pair of first modular parts. The second modular part includes a flanged cylinder. The flanged cylinder includes a quartz tube fitted therein, and at least one ultraviolet lamp fitted in a plane perpendicular to the flow of the fluid. The flanged cylinder is a metallic or a non-metallic (UV resistant) flanged cylinder. The ultraviolet lamp is enclosed inside the quartz tube with a cap through which air flow is given to prevent excess lamp heating. The ultraviolet lamp emits ultraviolet light in the direction of flow of fluid. The second module part also includes an ultraviolet intensity sensor and an ultraviolet transmittance sensor. The inputs from the ultraviolet intensity sensor, the ultraviolet transmittance sensor and a flow sensor are given to a controller that provides optimized UV dosage based on ultraviolet intensity of the ultraviolet lamp, ultraviolet transmittance of the fluid and the flow rate of the fluid.

In accordance with the present invention, the system is converted to a reaction chamber by connecting a third modular part on one side of each of the first modular parts using flanges. The third modular part includes a metallic or non-metallic cylinder with a flange connected at one end thereof, and a flanged pipe.

Brief description of the drawings

Figure 1 shows an ultraviolet disinfection system for fluids, in accordance with the present invention;

Figure 2 shows a pair of first modular parts of the ultraviolet disinfection system, in accordance with the present invention;

Figure 3 shows a second modular part of the ultraviolet disinfection system, in accordance with the present invention;

Figures 4A-4B show a graphical representation of effect of Total Internal Reflection (TIR) and Highly Reflective Coating (HRC) for higher UV dosage, in accordance with the present invention;

Figure 5 shows a modular ultraviolet disinfection system converted into a reaction chamber, in accordance with the present invention; and

Figure 6 shows a third modular part of the ultraviolet disinfection system responsible for conversion of an inline system into a reaction chamber, in accordance with the present invention.

Detailed description of the invention

The foregoing objects of the present invention are accomplished and the problems and shortcomings associated with the prior art, techniques and approaches are overcome by the present invention as described below in the preferred embodiment.

The present invention provides an ultraviolet disinfection system for fluids. The system of the present invention comprises a vessel made of three parts i.e., two identical first parts and a second modular part. The first two identical parts which form the vessel includes a quartz tube that is used for fluid flow along an axis of the tube and is surrounded by a metallic / non-metallic (UV resistant) flanged cylinder creating an air gap therebetween. The second modular part of the vessel is also made with metallic or non-metallic (UV resistant) flanged cylinder and carries at least one source of a UV light isolated from flowing fluid (flowing along the axis) and placed in a plane perpendicular to the flow of fluid and emits the UV in the direction of flow of fluid. The system of the present invention uses one or more number of third part of the vessel in between the first two parts of the vessel to increase the UV dosage of the system thereby making a modular system.

Throughout this application, with respect to all reasonable derivatives of such terms, and unless otherwise specified (and/or unless the particular context clearly dictates otherwise), each usage of:
“a” or “an” is meant to read as “at least one.”
“the” is meant to be read as “the at least one.”
References in the specification to “one embodiment” or “an embodiment” mean that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.

The present invention is now illustrated with reference to the accompanying drawings, throughout which reference numbers indicate corresponding parts in the
various figures. These reference numbers are shown in bracket in the following description and in table below:
Ref. No. Component name Ref. No. Component name
2 Air gap 32 Cap
4 Quartz tube of first modular part 40 Second modular part
8 Flanged cylinder of first modular part 50 Ultraviolet disinfection system
10 U seal 52 Metallic or non-metallic cylinder of third modular part
12 Flat seal 54 Flange
20A, 20B Pair of first modular parts 56 Blanked end of cylinder
22 Quartz tube of second module part 58 Flanged pipe
24 Ultraviolet lamp 60 Third modular part
26 Flanged cylinder of second module part 62 Inlet of reaction chamber
28 Ultraviolet intensity sensor 64 Outlet of reaction chamber
30 Ultraviolet transmittance sensor 100 Reaction chamber

Referring now to figures 1-6, an ultraviolet disinfection system (50) (hereinafter referred as “the system (50)”) for fluids in accordance with the present invention is shown. Particularly, the system (50) is used as a disinfection system for the fluids that flows therethrough. The system (50) is also used as an inline system and can be connected directly to the pipe using flanges. Specifically, the system (50) makes use of Total Internal Reflection (TIR) and Highly Reflective Coating (HRC) for enhancing the UV dosage.

As shown in figures 1-3, the system (50) comprises a pair of first modular parts (20A, 20B) and a second modular part (40). The pair of first modular parts (20A, 20B) and the second modular part (40) form a vessel of the system (50).

Each first modular part (20A, 20B) includes a flanged cylinder (8). The first modular parts (20A, 20B) are almost identical and make use of quartz tube (4) through which the fluid flows along the direction of an axis of the quartz tube (4). The quartz tube (4) is fitted inside the flanged cylinder (8) such that an air gap (2) is created in between the quartz tube (4) and the flanged cylinder (8). In an embodiment, the flanged cylinder (8) is a metallic or non-metallic (UV resistant) flanged cylinder.

In an implementation according to an embodiment of the present invention, the pair of first modular parts (20A, 20B) as shown in figure 2 are responsible for increase in UV dosage of the system (100) by means of Total Internal Reflection (TIR) and Highly Reflective Coating (HRC) on an outer surface of the quartz tube (4) mounted inside the flanged cylinder (8). The fitment of the quartz tube (4) is done using a U seal (10) and a flat seal (12) creating an air gap (2) in between the quartz tube (4) and the flanged cylinder (8). The quartz tube (4) is also partially coated with highly reflective coating.

The second module part (40) is fitted in between the pair of first modular parts (20A, 20B). As shown in figure 3, the second module part (40) includes a flanged cylinder (26), an ultraviolet (UV) intensity sensor (28), an ultraviolet transmittance (UVT) sensor (30). In an embodiment, the flanged cylinder (26) is a metallic or non-metallic (UV resistant) flanged cylinder. The flanged cylinder (26) includes a quartz tube (22) fitted therein and at least one ultraviolet lamp (24) (hereinafter, “(UV lamp (24)”) fitted in a plane perpendicular to the flow of the fluid. However, it is understood here that the flanged cylinder (26) may include any number of lamps in other alternative embodiment of the present invention as per intended use. A flow sensor is mounted in between the pipeline carrying the fluid and the system (50).

In an implementation according to an embodiment of the present invention, the second modular part (40) as shown in figure 3 is responsible for generation of UV with the at least one UV lamp (24) fitted along the diameter within the quartz tube (22) to isolate the lamp from the fluid flowing across the UV lamp (24). The UV lamp (24) is enclosed inside the quartz tube (22) with a cap (32) through which air flow is given to prevent excess lamp heating in case it is required. If multiple lamps are required, then the lamps (24) need to be placed along the parallel chords to the first lamp. However, it is understood here that the number of lamps can be two or more only restricted by dimensions of the system (50) but having no other restrictions. The input from the sensor/ sensors of the second modular part (40) is given to a controller. The system (100) is provided with the controller that makes use of inputs from the flow sensor, the UV intensity sensor (28) and the UVT sensor (30) connected to the system (50) to optimize the UV dosage of the system (50).

In an implementation according to an embodiment of the present invention, based on the UV dosage requirement one or more number of the second module part (40) carrying UV lamps (24) is assembled using the flanges and this stack is assembled in between the identical first module parts (20A, 20B) to form a modular system.

In an implementation according to an embodiment of the present invention, the modular system assembly is completed when at least one part of the second modular type and at least two parts of first modular type are connected using the flanges provided. The system (50) is connected to a pipeline and fluid starts flowing through the quartz tube (4). The UV emitted from the UV lamp (24) fitted in the second modular part (40) delivers the UV dosage to the fluid flowing through the system (50). The UV rays get reflected from the quartz tube (4) fitted in the first modular part (as shown in figure 4A) when the angle of incidence is greater than the critical angle, but the UV rays with angle of incidence less than critical angle gets transmitted through the quartz tube (4) instead of getting reflected.

In an implementation according to an embodiment of the present invention, the quartz tube (4) includes a partially coated surface area. The UV dosage is improved with a pre-defined position of the coated area of the quartz tube (4) and the optimized length of the coating along the length of the quartz tube or along the flow of fluid. In the context of the present invention, the required coating length is calculated based on the UV ray with angle of incidence equal to critical angle. The quartz tube needs to be coated till the point where the UV ray that starts from the center of the source with c meets the quartz tube wall. The coated quartz tube needs to be placed such that the position of the coating is near the UV lamp (24) on both sides of the second modular part (40).
In accordance with the present invention, the quartz tube (4) provided in the pair of first modular parts (20A, 20B) and the air gap (2) created in between the flanged cylinder (8) and the quartz tube (4) provides higher UV dosage because of the total internal reflection which is higher as compared to only cylinder. The total internal reflection happens due to a higher refractive index of quartz as compared to both air outside the quartz and fluid flowing inside the quartz. The condition for that is well known fact which is the angle of incidence shall be higher than critical angle c. For lower angles the UV light is transmitted through the quartz tube and hence that radiation is lost or not available completely for fluid treatment. The partially coated tube from outside with material such as aluminium that has highest reflection of about 85% for UV light is used to reduce the losses at lower angle of incidence. The techniques such as Thermal Spray Aluminium (TSA) or Physical Vapor Deposition (PVD) with masking technique can be used for mirror finished aluminium coating. This coating improves the UV dosage further to initial improvement observed due to TIR. The coating length along the quartz length again is dependent on quartz tube diameter along with the critical angle c. For larger quartz tube diameters, the coated length increases. Also, depending on the starting point of the UV ray this length either increases or decreases. The maximum increase in UV dosage or intensity is observed when the starting point of UV ray is from center of the lamp which is in line with the axis of the cylinder. For any other length found using extreme starting points of UV rays on the lamp length the UV intensity or dosage reduces. Thus, the coating length can be optimized to give maximum UV intensity or dosage using c which is dependent on the refractive index of the tube, the gap material and the fluid flowing inside the tube along with quartz tube diameter and the UV source arc length which is equal to the quartz diameter.

In another embodiment of the present invention, the quartz tube of the system (50) can be replaced with tubes made of other materials such as FEP but needs to have higher refractive index compared to air outside the tube and having good UV transmission. Further, the air gap (2) created in between the quartz tube (4) and the cylindrical shell (8) can make use of any other gas or vacuum. Instead of entry of fluid along the axis (i.e., in-line with pipe) the fluid entry can be converted into perpendicular to axis with a third modular part attachment same as shown in figure 5. So, the system shown in figure 5 can be used for fluid treatment / disinfection along with for chemical reaction.

In accordance with another embodiment of the present invention, the inline modular system (50) as described above and as shown in figure 1 is converted into a reaction chamber (100) (figure 5) using a third modular part (60). Particularly, the modular system gets converted to the reaction chamber (100) when the pair of first modular parts (20A, 20B) are attached to at least one second modular part (40) on one side in between the pair of first modular parts (20A, 20B) and the third modular part (60) on the other side to both the pair of first modular parts (20A, 20B) using flanges. At least one UV lamp (24) is installed in the second modular part (40) and a partially coated quartz tube (4) is installed in the first modular part (20A, 20B) with the air gap (2) created in between the outer flanged cylinder (8) and the inner quartz tube (4). As shown in figure 6, the third modular part (60) includes a metallic or non-metallic cylinder (52) with a flange (54) connected at one end thereof and blanked at another end (56). The third modular part (60) has a flanged pipe (58) connected perpendicular to the pipe axis and can be used either as an inlet (62) or an outlet (64) when connected to the complete modular system. Thus, giving the reaction chamber (100) one inlet (62) and one outlet (64) which can be used interchangeably. In accordance with the present invention, any reaction that is activated using UV light energy is carried out in the reaction chamber (100). Some reactions use catalysts that are activated with the UV source can also be used in the reaction chamber (100) to speed up the reactions. The UV source i.e. UV lamp (24) here is cooled using the air inlet provided through the cap (32). This cooling is required here as there is no flow of fluid and can be also due to excess heat released during the reaction. The controller provided with the system (50) also has a setting that is set to a predetermined reaction time so that the reaction is automatically stopped by switching off the UV lamp (24) and taking out the fluid inside the chamber (100) through the outlet (64).

In accordance with the present invention, the system (50) improves the UV dosage with optical reflections and the special coating. Due to inline system (50), the fluid/liquid inside does not change the flow direction, and the UV lamp (24) is placed perpendicular to the direction of flow of the fluid/liquid allowing the UV light to travel maximum distance in the fluid/liquid itself allowing the maximum UV dosage to be delivered to the fluid/liquid. The system (50) makes use of Total Internal Reflection (TIR) achieved with the quartz tube (4) inside the metal or plastic reactor wall and the air gap between these two. Further enhancement is achieved with the help of highly UV reflective coating applied on the outer wall of the quartz tube (4) in a specific area. Thus, the use of quartz tube (4) results in increased UV dosage delivered to the liquid due to TIR and the method of using partially coated quartz tubes further improves the UV dosage delivered to the liquid.

The invention is further illustrated hereinafter by means of examples.

Examples:

In accordance with the present invention, one number of first modular part (20A, 20B) and one number of second modular part (40) were connected. The UV lamp (24) was fixed in the second modular part (40) and UV sensor was placed on other side of the first modular part (20A, 20B) with water inside the quartz tube (4) the UV output was measured, and percentage increase was calculated with respect to same system without quartz.

The system (50) was tested in following cases:

Case 1: Fluid inside system: Borewell Water, Quartz diameter: 180 mm

System without quartz: 6.32 mW/cm2
System with quartz without coating: 6.55 mW/cm2, UV increase: 3.6%

System with quartz with coating
Optimized length coating: 100 mm: 7.1 mW/cm2, UV increase: 12.3%
Higher length coating: 190 mm: 6.92 mW/cm2, UV increase: 9.5%
Full length coating: 250 mm: 6.35 mW/cm2, UV increase: 0.5%

Case 2: Fluid inside system: Distilled water, Quartz diameter: 180 mm

System without quartz: 7.32 mW/cm2
System with quartz without coating: 7.5 mW/cm2, UV increase: 2.5%

System with quartz with coating
Optimized length coating: 100 mm: 8 mW/cm2, UV increase: 9.3%
Higher length coating: 190 mm: 7.8 mW/cm2, UV increase: 6.6%
Full length coating: 250 mm: 7.38 mW/cm2, UV increase: 0.8%

Case 3: Fluid inside system: Salt 2.5% + 97.5 % distilled water, Quartz diameter: 180 mm

System without quartz: 5.95 mW/cm2
System with quartz without coating: 6.2 mW/cm2, UV increase: 4.2%
System with quartz with coating
Optimized length coating:100 mm: 6.73 mW/cm2, UV increase: 13.1%
Higher length coating: 190 mm: 6.42 mW/cm2, UV increase: 7.9%
Full length coating: 250 mm: 6.0 mW/cm2, UV increase: 0.8%

Case 4: Fluid inside system: Milk 0.15% + 99.85% distilled water, Quartz diameter: 180 mm

System without quartz: 4.55 mW/cm2
System with quartz without coating: 4.8 mW/cm2, UV increase: 5.5%

System with quartz with coating
Optimized length coating: 100 mm: 5.25 mW/cm2, UV increase: 15.4%
Higher length coating: 190 mm: 4.95 mW/cm2, UV increase: 8.8%
Full length coating: 250 mm: 4.65 mW/cm2, UV increase: 2.2%

Case 5: Fluid inside system: Air, Quartz Diameter: 180 mm

System without quartz: 10.96 mW/cm2
System with quartz tube without coating: 11.5 mW/cm2, UV increase: 4.92 %

System with quartz with coating
Optimized length coating: 100 mm: 13.15 mW/cm2, UV increase 19.98 %
Higher length coating: 190 mm: 11.94 mW/cm2, UV increase: 8.94 %
Full length coating: 250 mm: 11.14 mW/cm2, UV increase: 1.64 %

From the above first 4 cases it was observed that, when no quartz tube was used the UV output was considered as standard output and all the calculations were made based on this standard UV output. It was observed that with use of quartz tube due to total internal reflection (TIR) there was increase in UV intensity which is about 2 – 5 %. With the highly reflective coating applied to the quartz tube there was further improvement in the range of 7 – 10% for different quality of water and different water solutions. In case 5, air was taken in the fluid for disinfection and for that the increase was 5% which is again within the range mentioned above (2-5%) with TIR but for optimized coating the further increase observed was highest at 15%.

Case 6: Fluid inside system: Borewell water water, Quartz diameter: 110 mm

System without quartz: 6.4 mW/ cm2
System with quartz without coating: 6.6 mW/cm2, UV increase 3.12%

System with quartz with coating
Optimized length coating: 60 mm: 6.92 mW/cm2, UV increase: 8.12%
Higher length coating: 120 mm: 6.78 mW/cm2, UV increase: 5.94%
Full length coating: 250 mm: 6.45 mW/cm2, UV increase: 0.78%

When the quartz tube diameter was reduced the optimized length or area of coating reduces which means the increase due to highly reflective coating will reduce as compared to uncoated quartz which is clear from the case 5 study, and we get only about 5 % increase in place of 7-10 % increase observed for higher diameter quartz.

Advantages of the invention

1. Being modular, the system (50) gives flexibility in terms of using more UV light sources and increasing the treatment length.
2. The present invention provides flexibility in terms of converting the system (50) from inline (flowing) fluid treatment system to an offline (stagnated) reaction chamber (100).
3. The system (50) uses UV transmitting tube like quartz or FEP with Total Internal Reflection (TIR) that helps to increase UV intensity and the dosage. The UV intensity and hence the dosage further increases due to Highly Reflective Coating (HRC) applied on the tube partially.
4. For the coated quartz tube, the length and hence the area of coating is determined using the tube diameter and critical angle that is dependent on refractive index of the tube, surrounding medium and fluid flowing through (or stored in) the tube. This gives a method of designing the system for different applications.

The foregoing objects of the invention are accomplished and the problems and shortcomings associated with prior art techniques and approaches are overcome by the present invention described in the present embodiment. Detailed descriptions of the preferred embodiment are provided herein; however, it is to be understood that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system, structure, or matter. The embodiments of the invention as described above and the methods disclosed herein will suggest further modification and alterations to those skilled in the art. Such further modifications and alterations may be made without departing from the scope of the invention. , Claims:We claim:

1. An ultraviolet disinfection system (50) for fluids, the system (50) comprising:
a pair of first modular parts (20A, 20B), each first modular part (20A, 20B) having a flanged cylinder (8), each flanged cylinder (8) having a quartz tube (4) fitted inside therein, wherein fluid flows along the direction of an axis of the quartz tube (4); and
a second modular part (40) fitted in between the pair of first modular parts (20A, 20B), the second modular part (40) having a flanged cylinder (26), the flanged cylinder (26) having a quartz tube (22) fitted therein, and at least one ultraviolet lamp (24) fitted in a plane perpendicular to the flow of the fluid.

2. The system (50) as claimed in claim 1, wherein the quartz tube (4) is fitted using a U seal (10) and a flat seal (12) creating an air gap (2) in between the quartz tube (4) and the flanged cylinder (8).

3. The system (50) as claimed in claim 1, wherein an outer surface of the quartz tube (4) is partially coated with highly reflective coating and coating length of the quartz tube (4) is optimized for improving the UV dosage.

4. The system (50) as claimed in claim 1, wherein the ultraviolet lamp (24) emits ultraviolet light in the direction of flow of fluid.

5. The system (50) as claimed in claim 1, wherein the flanged cylinder (8) and the flanged cylinder (26) are a metallic or a non-metallic (UV resistant) flanged cylinder.

6. The system (50) as claimed in claim 1, wherein the second module part (40) includes an ultraviolet intensity sensor (28) and an ultraviolet transmittance sensor (30).
7. The system (50) as claimed in claim 1, wherein inputs from the ultraviolet intensity sensor (28), the ultraviolet transmittance sensor (30) and a flow sensor are given to a controller that provides optimized UV dosage based on ultraviolet intensity of the ultraviolet lamp (24), ultraviolet transmittance of the fluid and the flow rate of the fluid.

8. The system (50) as claimed in claim 1, wherein the ultraviolet lamp (24) is enclosed inside the quartz tube (22) with a cap (32) through which air flow is given to prevent excess lamp heating.

9. The system (50) as claimed in claim 1 is converted to a reaction chamber (100) by connecting a third modular part (60) on one side of each of the first modular parts (20A, 20B) using flanges.

10. The system (50) as claimed in claim 9, wherein the third modular part (60) includes a metallic or non-metallic cylinder (52) with a flange (54) connected at one end thereof, and a flanged pipe (58).