JP3632375B2 - Condensate demineralizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a condensate demineralizer having a plurality of condensate demineralization towers and an ion exchange resin regeneration facility, and more specifically, a resin transfer pipe for transferring an ion exchange resin between the condensate demineralization tower and the regeneration facility. The present invention relates to a condensate demineralizer with an improved piping structure.
[0002]
[Prior art]
The condensate demineralization apparatus is used for a desalting treatment for removing impurity ions in condensate generated at a power plant such as a nuclear power plant or a thermal power plant. Condensate is water obtained by cooling steam used as a driving source for power generation turbines with a condenser, and a large amount of condensate is generated at the power plant. There are many. Further, since the ion exchange resin used in the condensate demineralizer is expensive, when the ion exchange resin in the condensate demineralization tower reaches the pour point, the ion exchange resin is regenerated and used repeatedly. Since a regeneration facility is used for the regeneration of the ion exchange resin, the condensate demineralizer generally includes a plurality of condensate demineralization towers and a regeneration facility. Each of these condensate demineralization towers and the regeneration facility are connected by a resin transfer pipe, and the ion exchange resin for regeneration and the regenerated ion exchange resin are transferred through the resin transfer pipe.
[0003]
Therefore, the relationship between each condensate demineralizer, the regeneration facility, and the resin transfer pipe will be described with reference to FIG. As shown in the figure, the condensate demineralizer is composed of a plurality of mixed ion exchange resins 10 in which, for example, a strong acid cation exchange resin 11 and a strongly basic anion exchange resin 12 are mixed. The condensate demineralization tower group 20 including the mixed bed type condensate demineralization towers 21 to 26, and the condensate demineralization tower group, which are shown in the drawing, are set in accordance with the condensate treatment amount). 20 is provided with a regeneration facility 30 that extracts and regenerates the mixed ion exchange resin 10 in the condensate demineralization tower that has reached the through-flow point. And the condensate demineralization tower group 20 and the reproduction | regeneration equipment 30 are connected via the 2 series resin transfer main pipe mentioned later. The regeneration facility 30 includes a regeneration tower 31 that separates the mixed ion exchange resin 10 into a strongly acidic cation exchange resin 11 and a strongly basic anion exchange resin 12 according to a density difference and regenerates them separately in the same tower, and the regeneration tower. And a resin storage tank 32 for storing the mixed ion exchange resin 10 regenerated at 31. The lower part of the regeneration tower 31 and the upper part of the resin storage tank 32 are connected by a connecting pipe 33, and the mixed ion exchange resin 10 regenerated in the regeneration tower 31 is transferred to the resin storage tank 32 through the connecting pipe 33. Reference numerals 34, 35 and 36 are valves.
[0004]
The two series of resin transfer main pipes include a first resin transfer main pipe 41 for transferring the regenerated mixed ion exchange resin 10 that has reached the flow-through point from each of the condensate demineralization towers 21 to 26 to the regeneration facility 30, and It comprises a second resin transfer main pipe 42 for transferring the used mixed ion exchange resin 10 from the regeneration facility 30 to an empty condensate demineralization tower. Although not shown, the first and second resin transfer main pipes 41 and 42 are provided with accessory devices such as valves and photoelectron tubes, and the resin slurry flows through the first and second resin transfer main pipes 41 and 42. The flow rate of the ion exchange resin diluted to a state where it can easily flow with water is adjusted, and the flow of the resin slurry is monitored.
[0005]
The first resin transfer main pipe 41 has branch pipes 41A to 41F branched to the condensate demineralization towers 21 to 26, and the first resin transfer main pipe 41 passes through the branch pipes 41A to 41F. 21 to 26 are connected to the bottom. Further, for example, automatic valves (hereinafter simply referred to as “valves”) 51 to 56 are arranged in the branch pipes 41A to 41F, respectively, and the condensate demineralization towers 21 to 26 are connected to the branch pipes 41A to 41F. 1 The resin transfer main pipe 41 is communicated with and cut off. The first resin transfer main pipe 41 is connected to the upper part of the regeneration tower 31 of the regeneration facility 30, and communicates between the first resin transfer main pipe 41 and the regeneration tower 31 by a valve 34 disposed at the end thereof. It is designed to shut off.
[0006]
Further, the second resin transfer main pipe 42 has branch pipes 42A to 42F that respectively branch above the condensate demineralization towers 21 to 26, and each condensate demineralization tower 21 via the branch pipes 42A to 42F. To the top of .about.26. Further, valves 61 to 66 are respectively provided in the branch pipes 42A to 42F, and the valves 61 to 66 communicate between the condensate demineralization towers 21 to 26 and the second resin transfer main pipe 42 to block them. I have to do it. The second resin transfer main pipe 42 is connected to the lower part of the resin storage tank 32 of the regeneration facility 30 and communicates between the second resin transfer main pipe 42 and the resin storage tank 32 by a valve 35 disposed at an end thereof. It is designed to shut off.
[0007]
Next, for example, a case where the mixed ion exchange resin 10 in the condensate demineralization tower 21 is regenerated will be described. In order to regenerate the mixed ion exchange resin 10 in the condensate demineralization tower 21, first, a water valve (not shown) is closed to isolate it from the other condensate demineralization towers 22 to 26. Next, for example, pure water and air are supplied from the lower part of the condensate demineralizer 21 with both the valve 51 of the lower branch pipe 41A of the condensate demineralizer 21 and the valve 34 on the regeneration tower 31 side opened. While stirring the mixed ion exchange resin 10, the resin concentration is diluted to a slurry concentration suitable for transfer. At this time, air is also supplied from the upper part of the condensate demineralizer 21 to gradually increase the pressure in the condensate demineralizer 21. When the pressure in the condensate demineralization tower 21 increases and reaches a pressure that overcomes the pressure loss of the first resin transfer main pipe 41, the resin slurry flows through the first resin transfer main pipe 41 from the already opened valve 51, It flows into the regeneration tower 31 through the valve 34. If pure water and air are continuously supplied, all the mixed ion exchange resin for regeneration 10 in the condensate demineralization tower 21 is finally transferred into the regeneration tower 31. When all the mixed ion exchange resins 10 are transferred into the regeneration tower 31, the regenerated mixed ion exchange resins 10 stored in advance in the condensate demineralization tower 21 emptied from the resin storage tank 32 of the regeneration facility 30. Transfer to
[0008]
When transferring the regenerated mixed ion exchange resin 10 from the regeneration facility 30, the valve 35 on the resin storage tank 32 side and the valve 61 of the upper branch pipe 42 </ b> A of the condensate demineralization tower 21 are both opened. Pure water and air are supplied from below, and the resin concentration is diluted to a slurry concentration suitable for transfer while stirring the regenerated mixed ion exchange resin 10 inside. Further, when air is also supplied from the upper part of the resin storage tank 32 and the pressure in the resin storage tank 32 overcomes the pressure loss of the second resin transfer main pipe 42, the resin slurry is transferred from the valve 35 that has already been opened to the second resin transfer. It flows through the main pipe 42 and flows into the condensate demineralization tower 21 through the valve 61. Finally, all the regenerated mixed ion exchange resin 10 in the resin storage tank 32 is transferred into the condensate demineralization tower 21; The next water flow becomes possible.
[0009]
On the other hand, when the regeneration facility 30 receives the regeneration mixed ion exchange resin 10, the regeneration tower 31 regenerates the regeneration mixed ion exchange resin 10. In this regeneration step, as conventionally known, the air scrubbing operation, backwashing operation, resin separation operation of the mixed ion exchange resin 10, the individual regeneration operation of the strongly acidic cation exchange resin and the strongly basic anion exchange resin after separation, and the individual Perform cleaning operations. When a series of regenerating operations is completed, the valve 36 is opened, and the regenerated mixed ion exchange resin 10 in the regenerating tower 31 is transferred to the resin storage tank 32 via the connecting pipe 33, where regenerated mixing is performed until the next required time. The ion exchange resin 10 is stored.
[0010]
[Problems to be solved by the invention]
However, in the case of the conventional condensate demineralization apparatus, the condensate demineralization towers 21 to 26 and the regeneration facility 30 are connected by two series of first and second resin transfer main pipes 41 and 42. The laying of the first and second resin transfer main pipes 41 and 42 is subject to various restrictions on the layout, and the respective piping structures become complicated, and the first and second resin transfer main pipes 41 and 42 have valves and optoelectronic switches, respectively. There was a problem that the construction cost would be increased due to the necessity of such accessory equipment. In addition, the two systems of the first and second resin transfer main pipes 41 and 42 have accessory devices, respectively, and the number of the accessory devices is large, and there is a problem that maintenance costs such as maintenance and inspection required for the accessory devices increase.
[0011]
The present invention has been made to solve the above-described problems, and can simplify the piping structure of the resin transfer pipe connecting each condensate demineralization tower and the regeneration facility, thereby reducing the construction cost and the maintenance cost. An object of the present invention is to provide a condensate demineralizer that can achieve the above.
[0012]
[Means for Solving the Problems]
The condensate demineralization apparatus according to claim 1 of the present invention comprises a plurality of condensate demineralization towers and a regeneration facility for regenerating the ion exchange resin in each condensate demineralization tower, The bottom of the demineralization tower and the regeneration facility are connected via a first resin transfer main pipe, and the upper portion of each condensate demineralization tower and the regeneration facility are connected via a second resin transfer main pipe. In the condensate demineralization apparatus that uses the resin transfer main pipe as a transfer of the ion exchange resin for regeneration of the condensate demineralization tower and uses the second resin transfer main pipe for the transfer of the regenerated ion exchange resin of the regeneration facility, the above First 1 Resin transfer main pipe And above First 2 Resin transfer main pipe Doubles as Common resin transfer main pipe The In addition to the common resin transfer main pipe plural A branch pipe is provided. And the plurality of branch pipes respectively connect the bottom of each condensate demineralization tower and the common resin transfer main pipe and use a plurality of first branch pipes used for transferring the regeneration ion exchange resin. , The common resin transfer main pipe Upper part of each condensate demineralizer And each Linking And a plurality of second branch pipes used for transferring the regenerated ion exchange resin, the common resin transfer main pipe and the regenerating equipment are connected and used for transferring the regenerating ion exchange resin. A branch pipe, and a fourth branch pipe that connects the common resin transfer main pipe and the regeneration facility and is used for transferring the regenerated ion exchange resin. It is characterized by this.
[0013]
The condensate demineralizer according to claim 2 of the present invention is the condensate demineralizer according to claim 1, wherein the common resin is provided with a water supply pipe for supplying water flowing in a direction opposite to the flow of the regenerated ion exchange resin. The transfer main pipe is connected to the end of the condensate demineralization tower side.
[0014]
Further, the condensate demineralization apparatus according to claim 3 of the present invention is the invention according to claim 1 or 2, wherein Second Downstream part of branch pipe In Bifurcated Do Provide branch pipes, connect each branch pipe to the adjacent condensate demineralization tower, Second above Branch pipe Adjoin It is characterized by being shared by the condensate demineralization tower.
[0015]
Moreover, the condensate demineralizer according to claim 4 of the present invention is the common resin transfer main pipe according to any one of claims 1 to 3. And each of the fourth branch pipes In Respectively The present invention is characterized in that a monitoring means for the ion exchange resin flowing inside is provided.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on the embodiment shown in FIG. 1 and FIG. In each figure, FIG. 1 is a flow diagram of a resin transfer line showing an embodiment of the condensate demineralizer of the present invention, and FIG. 2 is an enlarged view of a part of the condensate demineralizer shown in FIG. It is an enlarged view.
[0017]
As shown in FIG. 1, the condensate demineralization apparatus of the present embodiment includes, for example, six condensate dewatering units each filled with a mixed ion exchange resin 10 of a strongly acidic cation exchange resin 11 and a strongly basic anion exchange resin 12. A condensate demineralization tower group 20 composed of salt towers 21 to 26, and a regeneration facility 30 for regenerating the mixed ion exchange resin 10 in the condensate demineralization tower that has reached the pour point in the condensate demineralization tower group 20. And is configured. In addition, the regeneration facility 30 is regenerated in the regeneration tower 31 and the regeneration tower 31 that individually regenerates the strongly ionized cation exchange resin 11 and the strongly basic anion exchange resin 12 of the mixed ion exchange resin 10 as in the past. A resin storage tank 32 for storing the mixed ion exchange resin 10 is provided, and the regenerated mixed ion exchange resin 10 in the regeneration tower 31 is transferred as resin slurry to the resin storage tank 32 through the connecting pipe 33 and stored. .
[0018]
Now, in this embodiment, the piping structure of the resin transfer pipe connecting the condensate demineralization tower group 20 and the regeneration facility 30 is simplified as described below, and even if there are various restrictions due to the layout in the power plant, The construction cost can be reduced and the maintenance cost can be reduced. That is, conventionally, the first resin transfer main pipe used when transferring the ion exchange resin for regeneration as a resin slurry from the condensate demineralization tower to the regeneration facility and the condensate desalination from the regeneration facility using the regenerated ion exchange resin as the resin slurry. Although there were two series of second resin transfer main pipes used when transferring to the tower, in this embodiment, as shown in FIG. 1, the second resin transfer main pipes are combined into the first resin transfer main pipes to form a common resin transfer main pipe 70. It is characterized by a series of points.
[0019]
As shown in FIG. 1, the common resin transfer main pipe 70 has branch pipes that branch in the condensate demineralization tower group 20 and the regeneration facility 30. The branch pipes include first branch pipes 71 to 76 connected to the respective bottoms for taking out the regenerated mixed ion exchange resin 10 in the condensate demineralization towers 21 to 26 as a resin slurry, and each condensate demineralization. In order to receive the regenerated mixed ion exchange resin 10 as a resin slurry, the second branch pipes 77 to 79 connected to the upper parts of the towers 21 to 26 to receive the regenerated mixed ion exchange resin 10 as a resin slurry. The third branch pipe 70A connected to the upper part of the regeneration tower 31 of the regeneration facility 30 and the bottom of the resin storage tank 32 of the regeneration facility 30 for feeding the regenerated mixed ion exchange resin 10 as a resin slurry. It consists of a fourth branch pipe 70B.
[0020]
The first branch pipes 71 to 76 are provided with valves 51 to 56, respectively, and when the regeneration mixed ion exchange resin 10 is taken out from the condensate demineralizers 21 to 26, the valves 51 to 56 are individually opened. It is. In addition, as shown in FIG. 1, the second branch pipes 77 to 79 are extended from the common resin transfer main pipe 70 so as to reach above the condensate demineralization towers 21 to 26, and each extended end is bifurcated. It branches and it is made to share one 2nd branch pipe with the adjacent condensate demineralization tower. The second branch pipes 77 to 79 have a structure as shown in FIG. In FIG. 2, two condensate demineralization towers 21 and 22 are shown as representatives.
[0021]
For example, as shown in FIG. 2, when the common resin transfer main pipe 70 cannot pass under the condensate demineralization tower group 20 (shown by a one-dot chain line in FIG. 2) due to the layout of the power plant premises, the common resin transfer The main pipe 70 has to be laid at a position off from directly below. In this case, as shown in FIG. 2, the second branch pipe 77 forms an angle of, for example, 45 ° from the branch point of the common resin transfer main pipe 70 to the intermediate position of the adjacent condensate demineralization towers 21 and 22. And rises vertically upward from this intermediate position. Further, the second branch pipe 77 branches left and right as branch pipes 77A and 77B at a position slightly higher than the condensate demineralization towers 21 and 22, and the extended ends of the second branch pipes 77 are located above the condensate demineralization towers 21 and 22, respectively. It is connected. Note that reference numerals 61 to 66 denote valves disposed on the branch pipes 77A, 77B, 78A, 78B, 79A, and 79B, respectively.
[0022]
Further, as shown in FIG. 1, a water supply pipe 80 is connected to the end of the common resin transfer main pipe 70, and for example, pure water is supplied from the water supply pipe 80 to the common resin transfer main pipe 70, and the second branch pipe 77. In the second branch pipe to which the mixed ion exchange resin 10 of -79 is to be transferred, the resin slurry from the regeneration facility 30 is joined. The water supply flow rate at this time is adjusted by a valve 81 disposed in the water supply pipe 80. And, for example, to the right condensate demineralization tower 22 Resin slurry 2, when the resin slurry is flowed in the direction indicated by the solid arrow as shown in FIG. 2 and pure water is caused to flow in the direction indicated by the dashed-dotted arrow by antagonizing this flow, the resin slurry and Pure water merges in the second branch pipe 77. At this time, since the valve 61 of the left condensate demineralization tower 21 is closed in the second branch pipe 77, there is no flow in the branch pipe 77A, and the resin slurry flows only into the right condensate demineralization tower 22. The regenerated mixed ion exchange resin can be transferred only to the condensate demineralization tower 22.
[0023]
A photoelectron tube 90A is disposed in the common resin transfer main pipe 70 as a slurry resin monitoring means, and the resin slurry flowing in the common resin transfer main pipe 70 is monitored by the photoelectron tube 90A. The photoelectron tubes are disposed, for example, at two locations, and the other is disposed as a photoelectron tube 90B in the fourth branch tube 70B in the vicinity of the resin storage tank 32. The photoelectron tube 90A monitors the resin slurry entering and exiting the condensate demineralizer group 20, and the photoelectron tube 90B monitors the resin slurry flowing out of the regeneration facility 30. Therefore, it can be confirmed whether or not the resin slurry of the mixed ion exchange resin 10 that has reached the flow-through point by the photoelectron tube 90A has completely flowed out of the condensate demineralization tower group 20, and has been regenerated by the photoelectron tube 90B. Whether or not the resin slurry of the mixed ion exchange resin 10 has completely flowed out of the regeneration facility 30 can be confirmed. Further, it can be confirmed whether the regenerated mixed ion exchange resin 10 has completely flowed into the condensate demineralization tower group 20 by the photoelectron tube 90A. Although not shown, observation windows are attached to the condensate demineralization towers 21 to 26 and the resin storage tank 32, respectively, so that the state of the internal mixed ion exchange resin 10 can be confirmed by the inspection windows. It is.
[0024]
Next, the operation at the time of regeneration of the ion exchange resin will be described. For example, when the mixed ion exchange resin 10 in the condensate demineralization tower 22 of the condensate demineralization tower group 20 is regenerated, first, a water passage valve (not shown) is closed to demineralize the condensate demineralization tower 22. The process is stopped and isolated from the other condensate demineralization towers 21 and 23-26. Next, with both the valve 52 of the first branch pipe 72 of the condensate demineralizer 22 and the valve 34 of the regeneration facility 30 open, pure water and air are supplied from a valve (not shown) below the condensate demineralizer 22. The resin concentration is dilute to a slurry concentration suitable for transfer while individually supplying and stirring the mixed ion exchange resin 10 inside. At this time, air is also supplied from a valve (not shown) at the top of the condensate demineralizer 22 to gradually increase the pressure in the condensate demineralizer 22, and this pressure corresponds to the pressure loss of the common resin transfer main pipe 70. When the pressure that overcomes the above is reached, the resin slurry flows from the already opened valve 52 through the common resin transfer main pipe 70, flows out of the condensate demineralization tower group 20, and flows into the regeneration tower 31 through the valve 34. The flow of the resin slurry in the common resin transfer main pipe 70 at this time can be confirmed by the photoelectron tube 90A. If the supply of pure water and air is continued, all the mixed ion exchange resin 10 for regeneration in the condensate demineralization tower 22 is finally transferred into the regeneration tower 31. Whether or not all the resin slurry has been transferred to the regeneration facility 30 side can be confirmed by the photoelectron tube 90A. When all of the regenerated mixed ion exchange resin 10 is transferred into the regeneration tower 31, the regenerated mixed ion exchange resin 10 is transferred from the resin storage tank 32 into the empty condensate demineralization tower 22.
[0025]
At this time, pure water and air are supplied from the lower part of the resin storage tank 32 with both the valve 35 on the resin storage tank 32 side of the regeneration facility 30 and the valve 62 of the condensate demineralization tower 22 open, and the internal regenerated mixed ions are supplied. While stirring the exchange resin 10, the resin concentration is diluted to a slurry concentration suitable for transfer, and air is also supplied from the upper part of the resin storage tank 32. When the pressure in the resin storage tank 32 overcomes the pressure loss of the common resin transfer main pipe 70, it flows through the common resin transfer main pipe 70 via the fourth branch pipe 70B from the already opened valve 35. In parallel with this operation, when the valve 81 is opened and pure water is supplied from the water supply pipe 80 to the common resin transfer main pipe 70, the pure water merges with the resin slurry at the branch start point of the second branch pipe 77, and the second branch pipe. It flows into the condensate demineralizer 22 via 77 and its branch pipe 77B. At this time, the feed water flow rate from the feed water pipe 80 is adjusted to a flow rate that antagonizes the flow rate of the resin slurry from the regeneration facility 30. The state where the regenerated mixed ion exchange resin 10 flows out of the regeneration facility 30 can be monitored by the photoelectron tube 90B of the regeneration facility 30, and the state of flowing into the condensate demineralization tower group 20 side is monitored by the photoelectron tube 90A. be able to. Further, whether or not the transfer of the regenerated mixed ion exchange resin 10 is completed can be confirmed by both photoelectron tubes 90A and 90B.
[0026]
In addition, the lower portion of the second branch pipe 77 has a horizontal portion and a portion that rises at a right angle, but there is no possibility that the mixed ion exchange resin 10 stays, and the resin slurry can be reliably transferred above the second branch pipe 77. it can. Further, the downstream side of the second branch pipe 77 is branched into branch pipes 77A and 77B. Each of the branch pipes 77A and 77B extends horizontally from the branch start point, and the valve 61 of the branch pipe 77A is closed. Therefore, the resin slurry smoothly flows only to the branch pipe 77B leading to the condensate demineralization tower 22 without flowing into the branch pipe 77A side. In this way, the resin slurry flows into the condensate demineralization tower 22 via the branch pipe 77B and the valve 62, and finally all the regenerated mixed ion exchange resin 10 in the resin storage tank 32 is the condensate demineralization tower. The next water flow is possible.
[0027]
On the other hand, when the regeneration facility 30 receives the regeneration mixed ion exchange resin 10, the regeneration tower 31 regenerates the regeneration mixed ion exchange resin 10. In this regeneration step, suspended substances to which the mixed ion exchange resin 10 is adhered are removed by an air scrubbing operation, backwashing operation, or the like of the mixed ion exchange resin 10 as conventionally known. Next, when the mixed ion exchange resin 10 is separated by the density difference by the rising circulation water, the strong acid cation exchange resin 11 is formed as the lower layer, and the strong base anion exchange resin 12 is formed as the upper layer. Then, an aqueous sodium hydroxide solution is dispersedly supplied from the upper part of the regeneration tower 31 as an alkali regenerant, and the strong basic anion exchange resin 12 is regenerated while supplying balance water from the lower part of the regeneration tower 31. Water is supplied to wash the strongly basic anion exchange resin 12. The regeneration waste liquid at this time is discharged from the supply / drain pipe 31A arranged at the boundary between the upper layer and the lower layer. Furthermore, after supplying the aqueous hydrochloric acid solution as an acid regenerant from the lower part of the regeneration tower 31 and regenerating the lower layer strongly acidic cation exchange resin 11 while supplying the balance water from the upper part of the regeneration tower 31, pure water is supplied from above and below. The strong acid cation exchange resin 11 is washed. Thereafter, after the regenerated ion exchange resins 11 and 12 are mixed in the regeneration tower 31, the valve 36 is opened, and the regenerated mixed ion exchange resin 10 is transferred to the resin storage tank 32 through the connecting pipe 33. Here, the mixed ion exchange resin 10 is stored until the next required time.
[0028]
As described above, according to the present embodiment, the resin transfer main pipe for transferring the regenerated mixed ion exchange resin 10 from the regenerating facility 30 to the condensate demineralization tower group 20 and the regenerated mixed ion exchange resin 10 are decondensed. A common resin transfer main pipe 70 that commonly uses a resin transfer main pipe that is transferred from the salt tower group 20 to the regeneration facility 30 is provided, and a second branch pipe that communicates from the common resin transfer main pipe 70 to the condensate demineralization towers 21 to 26. 77 to 79 are provided, and the two conventional resin transfer main pipes are combined into one line, so that the piping structure of the common resin transfer main pipe 70 is extremely simplified, and even if there are restrictions on the layout in the power plant, the common resin transfer main pipe 70 piping design is easier than before, and the piping length can be shortened and the number of equipment attached to the resin transfer main pipe can be greatly reduced. It can be greatly reduced. In addition, maintenance costs such as maintenance and inspection of piping can be reduced with a reduction in the number of equipment attached to the resin transfer main pipe.
[0029]
Further, since the photoelectron tubes 90A are provided in the condensate demineralization tower group 20 and the regeneration facility 30, respectively, the flow of the resin slurry in the common resin transfer main tube 70 can be monitored by each photoelectron tube 90A and the resin slurry transfer is completed. This can be confirmed with certainty. Furthermore, since the feed water pipe 80 is connected to the end of the condensate demineralization tower group 20 of the common resin transfer main pipe 70 to supply pure water that antagonizes the flow of the resin slurry, the feed water flow rate from the feed water pipe 80 is changed. By appropriately adjusting the flow of the resin slurry, the regenerated mixed ion exchange resin 10 can be smoothly and surely transferred into a predetermined condensate demineralization tower of the condensate demineralization tower group 20 by controlling the flow of the resin slurry.
[0030]
Further, for example, the second branch pipe 77 communicating with the condensate demineralization towers 21 and 22 is bifurcated at the downstream portion thereof to provide branch pipes 77A and 77B. Since it connects with the upper part of the towers 21 and 22, and this 2nd branch pipe 77 was shared by both the condensate demineralization towers 21 and 22, the number of start-up piping can be reduced. Furthermore, the regenerated ion exchange resin 10 is only supplied to the second branch pipe 77 connected to the condensate demineralization towers 21 and 22 without transferring the regenerated mixed ion exchange resin 10 to the other second branch pipes 78 and 79. Can be smoothly and reliably transferred, and the regenerated ion exchange resin 10 can be transferred to the respective condensate demineralization towers 21 or 22.
[0031]
In addition, this invention is not restrict | limited to the said embodiment at all. For example, the piping structure of the second branch pipes 77 to 79 has an inclined portion with an inclination angle of 45 ° at the branch start point, but these inclination angles can be appropriately changed as necessary, and in some cases, the inclination is inclined. It is not necessary to provide a part. The monitoring means for the resin slurry is not limited to the photoelectron tube, and other photoelectric detection means can be used as appropriate as the monitoring means.
[0032]
【The invention's effect】
According to the first aspect of the present invention, the piping structure of the resin transfer pipe connecting each condensate demineralization tower and the regeneration facility can be simplified, thereby reducing the construction cost and the maintenance cost. It is possible to provide a condensate demineralizer that can be used.
[0033]
Further, according to the invention described in claim 2 and claim 3 of the present invention, in the invention described in claim 1, the regenerated ion exchange resin is smoothly and reliably transferred from the regeneration facility to each condensate demineralization tower. It is possible to provide a condensate demineralizer that can be used.
[0034]
According to the invention described in claim 4 of the present invention, in the invention described in any one of claims 1 to 3, the ion exchange resin is transferred between each condensate demineralization tower and the regeneration facility. It is possible to provide a condensate demineralizer capable of confirming the state with certainty.
[Brief description of the drawings]
FIG. 1 is a flow diagram of a resin transfer line showing an embodiment of a condensate demineralization apparatus of the present invention.
FIG. 2 is an enlarged view showing a part of the condensate demineralizer shown in FIG.
FIG. 3 is a flow diagram of a resin transfer line showing an embodiment of a conventional condensate demineralizer.
[Explanation of symbols]
10 Mixed ion exchange resin
20 Condensate demineralization towers (multiple condensate demineralization towers)
21-26 Condensate Demineralization Tower
41 1st resin transfer main pipe
42 Second resin transfer main pipe
30 Reproduction equipment
70 Common resin transfer main pipe
77-79 Second branch pipe (branch pipe)
77A, 77B Branch pipe
80 Water supply pipe
90A, 90B Photoelectron tube (monitoring means)

Claims (4)

A plurality of condensate demineralization towers and a regeneration facility for regenerating the ion exchange resin in each condensate demineralization tower, and the bottom of each condensate demineralization tower and the regeneration facility are connected to a first resin transfer main pipe And the upper part of each condensate demineralization tower and the regeneration facility are connected via a second resin transfer main pipe, and the first resin transfer main pipe is connected to the ion exchange resin for regeneration of the condensate demineralization tower. in condensate demineralizer using a second resin transfer main with use as a transport for the transport of regenerated ion exchange resin regeneration equipment, common resin serving also as the said first resin transfer main and the second resin transfer main a plurality of branch pipes to the common resin transfer main provided with a transfer main provided, and, the plurality of branch pipes, and the reproduction connecting each condensate demineralizer bottom and the common resin transfer main and respectively Used for the transfer of ion exchange resin A first branch pipe, and a plurality of second branch pipes to be used for the transfer of the common resin transfer main and the the top of each condensate demineralizer connected respectively and the regenerated ion exchange resin, the common A third branch pipe that connects the resin transfer main pipe and the regeneration equipment and is used for transferring the regeneration ion exchange resin, connects the common resin transfer main pipe and the regeneration equipment, and the regenerated ion exchange resin. A condensate demineralizer comprising: a fourth branch pipe used for transferring the water. The condensate according to claim 1, wherein a water supply pipe for supplying water flowing in a direction opposite to the flow of the regenerated ion exchange resin is connected to an end of the common resin transfer main pipe on the condensate demineralization tower side. Desalination equipment. The branch pipe that branches into two on the downstream portion of the second branch pipe is provided that, connected to the condensate demineralizer adjacent each branch pipe, and shared by the condensate demineralizer adjacent the second branch pipe The condensate demineralizer according to claim 1 or 2, characterized in that. The condensate drainage according to any one of claims 1 to 3, wherein each of the common resin transfer main pipe and the fourth branch pipe is provided with a monitoring means for ion exchange resin flowing inside each. Salt equipment.

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