UV reactor for treating wastewater from system decontamination of nuclear power plants.

Abstract

A UV reactor for treating waste liquid from system decontamination of a nuclear power plant is provided. The UV reactor includes a bar-shaped UV irradiation unit that irradiates UV light, and a passage unit that houses the UV irradiation unit and passes organic waste liquid through to be irradiated with the UV light, the passage unit including an input section into which the organic waste liquid is input, a discharge section from which the organic waste liquid is discharged, and a middle section between the input section and the discharge section where the UV irradiation unit is located.

Description

[Technical field]

[0001] The present invention relates to a UV reactor for treating wastewater from system decontamination of nuclear power plants. [Background technology]

[0002] Wastewater generated after system decontamination of nuclear power plants flows into a UV reactor, which is a wastewater decomposition treatment device. The organic waste liquid that has passed through the filter passes through a UV reactor and then moves to a buffer tank for CO2 gas removal. At this time, samples are taken before and after the UV reaction tank and TOC analysis is performed. In order to improve the decomposition of organic waste liquid, it is necessary to increase the number of contacts or the contact time in the UV reaction tank of the waste liquid decomposition treatment device. Summary of the Invention [Problem to be solved by the invention]

[0003] The problem to be solved by the present invention is that as organic waste liquid passes vertically or horizontally through the reaction tank, the contact time is short and the total waste liquid decomposition time increases. To solve this problem, the present invention provides a UV reaction device for waste liquid treatment due to system decontamination of nuclear power plants.

[0004] Another object of the present invention is to provide a UV reaction device for treating wastewater from system decontamination of nuclear power plants, which can increase the contact time of the UV lamp to shorten the wastewater decomposition time and improve the wastewater decomposition performance.

[0005] In addition, the waste liquid that has been decomposed by 90% or more through the circulation process between the buffer tank and the UV reactor flows into the system, diluting the organic waste liquid in the system and lowering its concentration, thereby shortening the time required for the waste liquid decomposition process. This is to provide a UV reactor for treating waste liquid due to system decontamination of a nuclear power plant.

[0006] In addition, the present invention provides a UV reaction device for treating wastewater from system decontamination of nuclear power plants, which can increase the contact time and number of contacts to compensate for the limitations of the existing organic acid decomposition process and improve the decomposition rate. [Means for solving the problem]

[0007] To achieve the above object, one embodiment of the present invention provides a UV reaction device for treating waste liquid through system decontamination at a nuclear power plant, the UV reaction device including a bar-shaped UV irradiation unit that irradiates UV light, and an intermediate unit that allows the filled organic waste liquid to be irradiated with the UV light, the intermediate unit including an input section into which the organic waste liquid is input, a discharge section from which the organic waste liquid is discharged, and an intermediate section that is positioned between the input section and the discharge section and is coiled in the height direction of the outer circumferential surface of the UV irradiation unit.

[0008] Also, at least the length of the intermediate portion may be greater than the length of the UV irradiation portion, thereby extending the time during which the organic waste liquid passing through the intermediate portion is exposed to the UV light.

[0009] To achieve the above object, a UV reaction device according to another aspect of the present invention includes a bar-shaped UV irradiation unit that irradiates UV light, and a transit unit that houses the UV irradiation unit and passes through which organic waste liquid is irradiated with the UV light, the transit unit including an input section into which the organic waste liquid is input, a discharge section from which the organic waste liquid is discharged, and an intermediate section located between the input section and the discharge section and in which the UV irradiation unit is located.

[0010] In addition, the UV irradiation sections are provided in multiple locations adjacent to each other, and multiple flat partition portions 1231 are provided on the inner surface of the middle portion, and the partition portions 1231 cause the organic waste liquid poured onto the inner surface of the middle portion to stagnate in the middle portion, thereby extending the time the organic waste liquid is exposed to the UV light.

[0011] The buffer tank also includes a buffer tank that circulates with the transit section, and the organic waste liquid irradiated with the UV light is poured into the buffer tank, and the poured organic waste liquid is poured into the transit section, thereby increasing the frequency with which the organic waste liquid is exposed to the UV light on the transit section again.

[0012] The apparatus further includes an analysis section for acquiring an analysis value of total organic carbon (TOC) of the organic waste liquid on the intermediate section, and the circulation operation can be repeated until the analysis value reaches a preset value.

[0013] The system further includes a first flow path, a second flow path connected by the first flow path for supplying the organic waste liquid to the filter section, a filter section for filtering the organic waste liquid supplied through the second flow path and supplying the filtered organic waste liquid to the intermediate section, a third flow path for supplying the organic waste liquid from the filter section to the intermediate section, a fourth flow path for supplying the organic waste liquid from the intermediate section to the buffer tank, a fifth flow path for supplying the organic waste liquid from the buffer tank to the intermediate section, a sixth flow path for supplying the organic waste liquid from the buffer tank to the first flow path, and a pump for pumping the organic waste liquid supplied from the buffer tank to the intermediate section. Effect of the Invention

[0014] The UV reactor of the present invention as described above provides one or more of the following advantages:

[0015] According to the present invention, there is a problem that the contact time is short and the total waste decomposition time increases as the organic waste passes vertically or horizontally through the reaction tank. To solve this problem, a UV reaction device for waste treatment due to system decontamination of nuclear power plants can be provided.

[0016] In addition, a UV reaction device for treating wastewater from system decontamination of a nuclear power plant can be provided, which can increase the contact time of the UV lamp to shorten the wastewater decomposition time and improve the wastewater decomposition performance.

[0017] In addition, the waste liquid that has been decomposed by 90% or more due to the circulation process between the buffer tank and the UV reactor flows into the system, diluting the organic waste liquid in the system and lowering its concentration, thereby shortening the time required for the waste liquid decomposition process. This makes it possible to provide a UV reactor for waste liquid treatment due to system decontamination of nuclear power plants.

[0018] In addition, it is possible to provide a UV reaction device for treating wastewater from system decontamination of nuclear power plants, which can increase the contact time and number of contacts to compensate for the limitations of the existing organic acid decomposition process and improve the decomposition rate. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 illustrates a UV reactor according to one embodiment of the present invention.

[0020] [Diagram 2] FIG. 2 is a diagram showing the configuration according to FIG. 1;

[0021] [Diagram 3] FIG. 2 shows another embodiment of the arrangement according to FIG. 1; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The features of the present invention and the methods of achieving them will become apparent from the following detailed description of the embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments are provided merely to complete the disclosure of the present invention and to fully inform those skilled in the art of the invention of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numbers refer to like elements throughout the specification.

[0023] FIG. 1 is a diagram illustrating a UV reactor according to one embodiment of the present invention. FIG. 2 shows the configuration according to FIG.

[0024] 1 and 2, a UV reactor for treating wastewater from system decontamination of a nuclear power plant according to one embodiment of the present invention includes a UV reactor 110 and a buffer tank 120. Here, the UV reaction tank 110 includes a UV irradiation section 111 and a passage section 112 , and this passage section 112 includes an input section 1121 , a discharge section 1122 and an intermediate section 1123 .

[0025] Here, the UV irradiation unit 111 is a bar-shaped body and can irradiate UV light. The intermediate section 112 is provided on the UV irradiation section 111 . The intermediate portion 112 is for allowing the filled organic waste liquid to be irradiated with UV light.

[0026] The organic waste liquid is input into the input portion 1121 of the intermediate portion 112 . The organic waste liquid is discharged to a discharge portion 1122 of the intermediate portion 112 .

[0027] The intermediate portion 1123 of the passage portion 112 is located between the input portion 1121 and the discharge portion 1122 . The intermediate portion 1123 is provided in a coil shape in the height direction of the outer circumferential surface of the UV irradiation unit 111 .

[0028] Here, the intermediate portion 1123 may have a length value that is at least greater than the length value of the UV irradiation portion 111 . This allows the organic waste liquid passing through the intermediate portion 1123 to be exposed to UV light for an extended period of time.

[0029] Furthermore, the partition portion 1231 is designed so that the width of the arrangement becomes narrower from the input portion 1121 to the output portion 1122, in order to take into consideration the pressure when the flow rate enters the input portion 1121.

[0030] FIG. 3 shows an alternative embodiment of the arrangement according to FIG. The following description will be based on the above-described embodiment, focusing on the technical features.

[0031] 1 and 3, a UV reaction device according to another embodiment of the present invention includes a UV irradiation section 111, a passage section 112, and a buffer tank 120, similar to the above embodiment. The intermediate section 112 includes an input section 1121, a discharge section 1122, an intermediate section 1123, a first flow path P1, a second flow path P2, a third flow path P3, a fourth flow path P4, a fifth flow path P5, and a sixth flow path P6.

[0032] Here, the intermediate section 112 can accommodate the UV irradiation section 111 therein. The intermediate section 112 is for passing the organic waste liquid so as to be irradiated with UV light.

[0033] The intermediate portion 1123 of the passage portion 112 may be located between the input portion 1121 and the discharge portion 1122 . The UV irradiation unit 111 may be located in the middle portion 1123 .

[0034] A large number of the UV irradiation units 111 are provided adjacent to each other. The intermediate portion 1123 has a number of flat partition portions 1231 provided on the inner circumferential surface.

[0035] The partition portion 1231 allows the organic waste liquid introduced onto the inner circumferential surface of the middle portion 1123 to stagnate in the middle portion 1123 . Thus, the organic effluent can be exposed to UV light for an extended period of time.

[0036] As described above, the partition portions 1231 are arranged such that the spacing between the partition portions 1231 becomes gradually narrower from the input portion 1121 side toward the discharge portion 1122 side. This is to take into consideration the pressure at the time of inflow at the input portion 1121 .

[0037] The buffer tank 120 can perform a circulating operation with the passage portion 112 . The buffer tank 120 receives the organic waste liquid irradiated with UV light.

[0038] The buffer tank 120 introduces the input organic waste liquid into the transit section 112, thereby increasing the frequency with which the organic waste liquid is exposed to UV light on the transit section 112.

[0039] The analysis section 115 can obtain an analysis value of the total organic carbon of the organic waste liquid on the intermediate section 112 . Here, the circulation operation is repeated until the analysis value reaches a preset value.

[0040] At this time, the analysis of total organic carbon by the analysis section 115 is performed in the upstream and downstream of the UV reaction tank 110, the UV irradiation section 111, the intermediate section 112, etc. Specifically, the analysis unit 115 can be provided on each of the input portion side 1121 and the output portion side 1122 to perform analysis.

[0041] The first flow path P1 is connected to a filter unit 130 via a second flow path P2, and is connected to a buffer tank 120.

[0042] The filter unit 130 can filter the organic waste liquid supplied from the first flow path P1. Furthermore, the filter unit 130 can supply the filtered organic waste liquid to the via unit 112 . The third flow path P3 can supply the organic waste liquid from the filter section 130 to the intermediate section 112.

[0043] The fourth flow path P4 can supply the organic waste liquid to the intermediate portion 112 and the buffer tank 120. The fifth flow path P5 can supply the organic waste liquid from the buffer tank 120 to the intermediate portion 112. The sixth flow path P6 can supply the organic waste liquid from the buffer tank 120 to the first flow path P1.

[0044] The pump PM is for pumping the organic waste liquid supplied from the buffer tank 120 to the intermediate section 112 .

[0045] Although an embodiment of the present invention has been described above with reference to the accompanying drawings, a person having ordinary skill in the art to which the present invention pertains can understand that the present invention can be embodied in other specific forms without changing its technical concept or essential features. Therefore, it should be understood that the above-described embodiment is illustrative in all respects and is not limiting.

Claims

1. A UV reaction device for treating wastewater from system decontamination of a nuclear power plant, comprising: a UV irradiation unit that is a bar-shaped body provided in a height direction and irradiates UV light; and a via unit that is provided in the height direction of the UV irradiation unit and accommodates the UV irradiation unit therein, and through which the organic waste liquid is irradiated with the UV light, the intermediate section includes an input section provided on the bottom side of the UV irradiation section and into which the organic waste liquid is input, a discharge section provided on the top side of the UV irradiation section and into which the organic waste liquid is discharged, and an intermediate section located between the input section and the discharge section and in which the UV irradiation section is located, A number of flat partition walls are provided along a height direction on an inner circumferential surface of the intermediate portion, A UV reaction device for treating waste liquid from system decontamination of a nuclear power plant, wherein the partition portions are arranged so that the separation state of the partition portions becomes gradually narrower from the input portion side toward the discharge portion side.

2. The UV irradiation units are provided in large numbers adjacent to each other, 2. The UV reaction device for waste liquid treatment by system decontamination of a nuclear power plant according to claim 1, wherein the partition portion causes organic waste liquid input onto an inner peripheral surface of the middle portion to stagnate in the middle portion, thereby extending a time during which the organic waste liquid is exposed to the UV light.

3. Further comprising a buffer tank which circulates with the passage portion, 2. The UV reaction device for waste liquid treatment by system decontamination of a nuclear power plant according to claim 1, wherein the buffer tank receives the organic waste liquid irradiated with the UV light and feeds the organic waste liquid into the intermediate section to increase the frequency at which the organic waste liquid is exposed to the UV light on the intermediate section.

4. Further comprising an analysis section for acquiring an analysis value of total organic carbon of the organic waste liquid on the intermediate section; 4. The UV reaction device for waste liquid treatment due to system decontamination of a nuclear power plant according to claim 3, wherein the circulation operation is repeated until the analysis value reaches a preset value.

5. 5. The UV reaction device for treating waste liquid due to system decontamination of a nuclear power plant according to claim 4, wherein the analysis units are provided on the input portion side and the discharge portion side, respectively, to perform analysis.

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