Method for evaluating failure degree of ion exchange resin

Abstract

The invention discloses a method for evaluating the failure degree of ion exchange resin. The method specifically comprises the following steps of 1, obtaining the equilibrium adsorption quantity of the ion exchange resin; 2, obtaining the adsorption characteristics of ion exchange resin on the degradation products in a cold water system in an ultra-high voltage converter valve; 3, establishing a Langmuir adsorption isothermal model and a Freundlich adsorption isothermal model, and fitting data to obtain a saturation adsorption capacity characteristic constant and an adsorption strength characteristic constant; 4, fitting the data by using quasi-first-level dynamics, quasi-second-level dynamics and a particle internal diffusion model to obtain an adsorption rate constant and an internal diffusion rate constant; and 5, calculating the failure degree of the ion exchange resin according to the obtained equilibrium adsorption capacity, adsorption mass, saturated adsorption capacity, adsorption strength, adsorption rate constant and internal diffusion rate constant. According to the evaluation method for the failure degree of the ion exchange resin, the quantitative and accurate evaluation on the failure degree of the ion exchange resin is realized.

Description

technical field [0001] The invention belongs to the technical field of ultra-high pressure converter valves, and relates to a method for evaluating the failure degree of ion exchange resins. Background technique [0002] The cooling water system in the UHV converter valve plays a vital role in cooling the converter components in time and ensuring the safe operation of the converter valve. At present, the corrosion problem of the cooling water system in the UHV converter valve is common in domestic converter stations, and typical failures of the cooling water system in the converter valve occur frequently. On the one hand, the corrosion of the internal cooling water system causes loss to the components themselves, on the other hand, it affects the safe operation of the system, and there is a safety risk of causing equipment shutdown. Studies have shown that the thyristor aluminum radiator is the main part of the corrosion of the internal cooling water system, and it is also ...

AI Technical Summary

Problems solved by technology

However, after long-term use, the ion exchange resin will inevitably reduce its work performance due to the adsorption of a large number of degradation products. The broken ion exchange resin powder may leak into the main cooling circuit of the internal cooling water. Although it will not cause a significant change in the conductivity of the internal cooling water, due to It can form a local strong acid or strong alkali environment, which will destroy the dense oxide film on the surface of the aluminum radiator, thus causing chemical corrosion of the aluminum radiator

Corrosion products are deposited on the surface of the voltage equalizing electrode under the environment of water flow and electric field, causing scaling of the equalizing electrode and accelerating electrolytic current corrosion

[0004] Therefore, ion exchange resin is a key factor affecting the chemical corrosion of aluminum radiators, but the evaluation method for the failure degree of ion exchange resin has not been reported, so it is urgent to propose an evaluation method for the failure degree of ion exchange resin

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