JPS6147592A - Condemiless condensate purifying facility - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to condensate purification equipment, and particularly relates to a filter suitable for several condensate purification equipment for the purpose of improving the quality of water supply to nuclear power plants, etc. It is something.

[Background of the invention]

Conventional nuclear power 09! In condensate purification equipment at military bases, etc., insoluble substances (hereinafter referred to as crud) and soluble substances (crud) are removed from condensate.
In order to remove ions (hereinafter referred to as ions) and improve water quality, a mixed bed desalination device or a condensate purification facility that combines a filter aid type filter and a mixed bed desalination device is used. However, due to the large amount of waste generated due to the regeneration of ion exchange resins and backwashing of filter aids, which are essential for continuous use of these devices, and the heat resistance properties of the ion exchange resins used, There were drawbacks such as the efficiency of the system's thermal cycle being restricted because the temperature of the treated water was restricted.

Also, when wood is generated as secondary waste.

The problem was that it was difficult to process.

In order to overcome these drawbacks, various improvements have been made to various desalination equipment and filters, and in particular, some non-auxiliary filters have been developed for the purpose of suppressing the generation of secondary waste. Although some methods have excellent removal performance for crud, they lack removal performance for ions, so they are not sufficient for condensate purification equipment such as nuclear power plants, which have strict water quality standards, and mixed bed type As a result, it has been impossible to provide equipment that completely overcomes the above-mentioned problems because it requires combination with a desalination device.

[Purpose of the invention]

The purpose of the present invention is to comprehensively address the problems in conventional condensate purification equipment as already mentioned. The amount of waste generated during regeneration and backwashing operations performed for continuous use of equipment can be minimized, and it can withstand high-temperature usage conditions. Our objective is to provide condensate purification equipment that can improve the thermal efficiency of the entire system.

[Summary of the invention]

The ion clad filter, which is the main element constituting the condensate purification equipment of the present invention, can compensate for the drawbacks of various conventional desalination equipment and filters, and is a non-auxiliary material type as the main purchased component. The filter material is characterized in that it uses a fibrous or membrane-like filter medium having a porosity of 100%, and is further treated to have an ion exchange ability.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows an example of the case where the condensate purification equipment according to the present invention is employed in the general system configuration of the standard MR Plan 1-.

Steam generated by the nuclear reactor 1 drives a high pressure turbine 2 and a low pressure turbine 3, and then is cooled in a condenser 4. The cooled condensate is transferred by a condensate pump 5 and passes through an air extractor 6 to the condensate purification equipment 7 introduced in the present invention.
supplied to In the condensate purification equipment 7, crud and ions contained in the condensate after the reactor 1 are removed,
The purified condensate is supplied to the reactor 1 again through the low-pressure feedwater heater 8 and the high-pressure feedwater heater 9.

As mentioned above, the condensate purification equipment 7 according to the present invention can obtain stable performance even at higher temperatures than conventional hotbed desalination equipment, etc. Therefore, the condensate purification equipment 7 is shown in FIG. Low pressure feed water heater 8 shown in Figure 1, not located in the system.
and the high-pressure feed water heater 9.

FIG. 2 shows the system configuration of the condensate purification equipment according to the present invention. Condensate entering from the condensate inlet 4 of the ion clad filter 3 passes through the filter medium 10.

Here, after the crud and ions contained therein are removed, the condensate is discharged from the condensate outlet 5. As the ion clad filter 3 is used, cladding and ions accumulate in the filter medium 10 formed therein. The increase in the physical differential pressure of the filter medium 10 mainly due to crud is monitored by the differential pressure gauge 8, while the chemical decrease in the ion exchange capacity of the filter medium 10 mainly due to ions is monitored by the conductivity gauge 9 installed downstream of the condensate outlet 5. monitored by In order to ensure performance stability during long-term use of the filter medium 1o, a differential pressure gauge 8 or a conductivity gauge 9
If either of them rises to a predetermined value, the filter medium 10
Carry out regeneration or backwashing operations. The regeneration operation can be performed by separately injecting acid and alkali into the ion clad filter 3 from the regeneration acid tank 1 and the regeneration loading tank 2, thereby activating the ion exchange ability of the filter medium 10.

On the other hand, the backwashing operation can be carried out by supplying pressurized air stored in the pressurized tank 11 to the ion clad filter 3 and creating a flow against the filter medium 10 in the opposite direction to the water sampling during normal operation.

Waste liquid generated by the construction or backwashing operation is collected in a waste liquid receiving tank 6 and transferred by a transfer pump 7 to a further downstream processing facility.

〔Effect of the invention〕

As introduced in the present invention, due to the characteristics of the material, it is possible to obtain high removal performance for crud due to the physical property of porosity, and high removal performance for ions due to the chemical property of ion exchange ability imparted to the filter material. is possible,
A single device provides satisfactory performance for both cladding and ions.

In addition, compared to the hotbed desalination equipment used in conventional condensate purification equipment, the physical property of the porosity of the filter media mentioned above has an extremely effective effect on the chemical property of ion exchange capacity. Therefore, in the regeneration operation performed when the ion exchange capacity of the device reaches saturation during use, the amount of acid and alkali required is 1/1 of the equivalent ion load over the history of the device. 10 or less is sufficient.

Therefore, in the long run, it becomes possible to significantly reduce the amount of chemicals required for regeneration, and at the same time, the amount of secondary regeneration waste liquid is also reduced proportionally. In particular, recycled waste fluid generated from condensate purification equipment at nuclear power plants has radioactivity.
Since the treatment requires a lot of effort, the present invention is expected to have an extremely large effect in reducing recycled waste liquid.

In addition, the improved filter material, which is the main barrier material of the present invention, has a thermal stability of the ion exchange group fixed in the material, which is the basis of its ion exchange ability, compared to that of conventional ion exchange resin. It is excellent.

Because of this feature, compared to conventional hotbed desalination equipment that uses ion exchange resin or filters that use powdered resin as a performance aid, it can demonstrate performance even under higher temperature conditions. Because of this feature, for example, when installing the equipment introduced in this invention in place of the conventional hotbed type desalination equipment in condensate purification equipment of a nuclear power plant, the equipment introduced in this invention can be installed from the condenser outlet to the low-pressure turbine heat exchange layer. This makes it possible to raise the temperature to a higher temperature than the previous one, which has the great effect of improving the thermal efficiency of the entire plant.

Furthermore, compared to conventional condensate purification equipment that combines a filter and a hotbed desalination equipment for the purpose of maintaining higher water quality in nuclear power plants, the present invention achieves the objective with a single type of equipment. Therefore, it is expected that the installation space will be reduced and economical efficiency will be improved.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing the position of the condensate purification equipment of the present invention in the overall system of a standard MR type nuclear power plant, and Fig. 2 shows the system layout of the condensate purification equipment. It is. In Figure 1, 1...nuclear reactor, 4...condenser, 7 river condensate purification equipment. In Fig. 2, 1... acid tank for regeneration, 2... caustic tank for regeneration, 3... ion clad filter. Drawing itching:! ! : (Contents (no change) 4 l item $ 2 item procedural amendment (method) 1.118'1 Director General Manabu Shiga 1j; Indication of the matter 1980 1.1 J Patent Application No. 168395 Invention Invention
Name: Person who amends Conodemires Water Purification Equipment
Satoshi Hitori Aya 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo 1001
Power of attorney (2) As per the engraving and attachment of the specification originally attached to the DI document (no changes to the contents). (3) As per the engraving and attached sheet of the drawing originally attached to the application.
(No change in content). (4) Submit the power of attorney as attached. that's all

Claims (1)

[Claims] 1. In a condensate purification filter composed of a porous fibrous or membrane-like filter medium, the filter medium, which has the ability to remove known insoluble substances, is further given the ability to remove soluble substances. , a condensate-less condensate having the ability to remove both insoluble and soluble impurities in the condensate, and when the filter medium is treated as waste, it can be easily treated by thermal decomposition etc. Purification equipment.