Multichannel intelligent cation exchange system

Abstract

A multichannel intelligent cation exchange system comprises a plurality of electrical regeneration units which are connected in parallel and are provided with water inlets and loaded with strong-acid cation exchange resin, 5 to 1000mA of working current is applied to each electrical regeneration unit, and H<+> is generated through electrolysis of water, effluent of each electrical regeneration unit is respectively connected with a corresponding electrical conductivity detector, water samples containing the H<+> pass through the electrical conductivity detectors and return to the corresponding electrical regeneration unit to regenerate the strong-acid cation exchange resin in the electrical regeneration units. An electrochemical method for continuously and automatically regenerating the cation exchange resin is used for measuring the hydrogen conductivity in water vapour of a power station. A plurality of channels are designed, so that a plurality of different water samples can be processed simultaneously, and cations in the water are thoroughly converted into the H<+> without needing any chemical reagents; the multichannel intelligent cation exchange system can be applied to measuring the hydrogen conductivity in the water vapour on line, is energy-saving and environment-friendly, stable in performance and convenient in operation.

Description

technical field [0001] The invention relates to a cation exchange system, in particular to a multi-channel intelligent cation exchange system. Background technique [0002] Hydrogen conductivity is an important index to characterize the purity and corrosiveness of water (steam) in power plants. It refers to the removal of cations (converted into H + ) and then monitor the conductivity value. In this process, the ammonia and amines that adjust the pH are removed, and the remaining salt impurities are converted into acid forms, and the aggressive anions (Cl - etc.) the detection sensitivity was greatly improved. [0003] However, in practical applications, carbon dioxide in the air is very easy to enter the measurement system and affect the measurement, so in many cases it is required to measure the degassing of water (CO 2 ) hydrogen conductivity in order to more accurately reflect the content of erosive anions in water. At present, the method used by power plants to meas...

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Problems solved by technology

[0004] Defects of the prior art: using an ion exchange column, if the resin is not replaced in time, the value displayed on the hydrogen conductivity meter will deviate from the actual value; after the resin is replaced, the regeneration is not complete or the washing is insufficient, and the release of traces of impurity ions will cause positive Errors; some cation exchange resins release low-molecular polymer impurities, which increases the background conductivity and reduces the detection sensitivity, resulting in inaccurate hydrogen conductivity measurement; the power plant does not know when the resin will fail, resulting in deviations in the measurement results; frequent regeneration of the resin is required, The work intensity of the staff is high; one exchange column can only be used for one conductivity meter, which takes up a lot of space

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