阅读说明：本技术 用于识别在热电设备的冷凝器中引起原水泄漏的单元的方法 (Method for identifying a unit causing raw water leakage in a condenser of a thermoelectric device ) 是由 克里斯托夫·布尔乔亚 埃斯特尔·里奥里 于 2018-12-14 设计创作，主要内容包括：本发明涉及一种用于识别在由n个单元组成的热电设备的冷凝器中引起原水泄漏的单元的方法。(The invention relates to a method for identifying a cell causing a raw water leak in a condenser of a thermoelectric device consisting of n cells.)

1. A method for identifying a unit causing leakage of raw water in a condenser of a thermoelectric device, the condenser being composed of n units, n being an integer of 2 to 15, preferably 3 to 8,

wherein each of said n units is equipped with a cartridge for containing an ion exchange resin having a volume of 50 to 150mL, advantageously 80 to 120mL,

the method comprises the following steps:

a) purifying, for each of the n units, the ion exchange resin to be placed in the cartridge;

b) placing the purified ion exchange resin obtained at the end of step a) in said cartridge for each of said n units;

c) for each of the n units, passing a volume of condensed water of 500 to 1500L, advantageously 800 to 1200L, into the cartridge containing the purified ion exchange resin put in place in step b);

d) collecting, for each of the n units, the ion exchange resin obtained at the end of step c);

e) regenerating the ion exchange resin collected in step d) by elution with an aqueous regeneration solution for each of the n units;

f) collecting the eluate obtained at the end of step e) for each of n units, and subsequently determining the nature of the ionic species present in the eluate and the amount of each ionic species present in the eluate; and

g) comparing the amount of each of the ionic species identified in step f) determined in each of the n eluates.

2. The method for identifying a unit causing raw water leakage in a condenser of a thermoelectric device according to claim 1, wherein the total exchange capacity of the ion exchange resin is greater than 1.0eq/L, preferably greater than 1.5eq/L, advantageously greater than 2.0 eq/L.

3. The method for identifying a unit causing leakage of raw water in a condenser of a thermoelectric device as set forth in claim 1 or 2, wherein the raw water contains Na therein⁺And/or Ca²⁺And the ion exchange resin is a cationic resin.

4. The method for identifying a unit causing raw water leakage in a condenser of a thermoelectric device according to claim 3, wherein step a) is performed by eluting the cationic resin with an acidic solution having a volume of at least 2 times, in particular at least 4 times, advantageously at least 5 times the volume of the resin.

5. The method for identifying a unit causing leakage of raw water in a condenser of a thermoelectric device as set forth in claim 4, wherein the acidic solution is Na⁺And Ca²⁺Strongly acidic solutions having a concentration of ions of less than 1ppb, in particular less than 0.5ppb, in particular less than 0.2 ppb.

6. The method for identifying a unit causing raw water leakage in a condenser of a thermoelectric device according to any of claims 3 to 5, wherein step e) is performed by eluting the cationic resin with an aqueous regeneration solution having a volume of at least 2 times, in particular at least 4 times, advantageously at least 5 times the resin volume.

7. The method for identifying a unit causing leakage of raw water in a condenser of a thermoelectric device as set forth in claim 6, wherein the aqueous regeneration solution is Na⁺And Ca²⁺Strongly acidic solutions having a concentration of ions of less than 1ppb, in particular less than 0.5ppb, in particular less than 0.2 ppb.

8. The method for identifying a unit causing leakage of raw water in a condenser of a thermoelectric device as set forth in claim 1 or 2, wherein the raw water contains Cl^–And the ion exchange resin is an anionic resin.

Drawings

FIG. 1: simplified representation of pressurized water nuclear power equipment.

FIG. 2: schematic view of a steam generator.

FIG. 3: schematic of a basic condenser unit associated with its detection system consisting of a cation exchange resin and a conductivity meter.

FIG. 4: na for cation exchange resin⁺Schematic of ion saturation.

FIG. 5: schematic representation of cation exchange resin regeneration.

FIG. 6: a schematic diagram of the steps carried out in the examples described below.

Fig. 7a and 7 b: without carrying out the resin purification step (7b) or by carrying out the process (7a) according to the invention, described belowCa measured in different units of the condenser in the examples²⁺The ion concentration.

Example (b):

implementation of the method according to the invention

The following scheme is implemented on a nuclear power plant condenser consisting of 7 units, and a cooling loop of the nuclear power plant condenser contains Na⁺And Ca^{2 +}Ion raw river water is supplied. The different steps are shown in fig. 6.

The cationic resin used was Amberlite IRN 97H.

Resin purification was performed by pouring 500mL of the hydrochloric acid acidic solution onto 100mL of the resin. The solutions being sold by merck

15% dilution of hydrochloric acid, Na for dilution⁺And Ca²⁺Demineralized water with a concentration of less than 1 ppb.

A cartridge containing 100mL of the previously purified cationic resin was placed on each condenser unit.

The water from secondary loop (a) is passed through a cartridge containing 100mL of purified cationic resin, the cations contained in the water being retained on resin (b). Once enough condensed water passes through the resin (about 1 m)³) The resin was recovered and transferred to (c) a laboratory glass column (d). Then with a gas containing H⁺The concentrated acidic solution of ions (e) elutes the resin from the glass column (acid is circulated over it). H⁺The ions will displace the fixed cations (g and h) on the resin. The cations (f) thus removed will be recovered and measured by a specific device (i).

The elution operation was: pour 500mL or more of acid onto 100mL of resin. The acidic solution used is the same as that used for the purification operation. The acid flows through the resin at a rate of one to two drops per second. The eluate was recovered from the resin in 100mL portions. Calcium was dosed to each fraction collected by atomic absorption spectrophotometry.

These cations come from a known volume of condensed water used to elute the resin. Thus, the Ca present in the condensate of each unit was determined²⁺Concentration of ionsDegrees are possible.

The results obtained are shown in figure 7a below.

Comparative example:

the same protocol was repeated, but the cationic resin was not purified. The results obtained are shown in figure 7b below.