Method and device for evaluating urea crystallization risk based on steady-state working condition

Abstract

The invention discloses a method and device for evaluating the urea crystallization risk based on a steady-state working condition. According to the method for evaluating the urea crystallization risk based on the steady-state working condition, a urea crystallization risk coefficient eta is evaluated through three coefficients, including a quality coefficient eta m, a temperature coefficient eta t and an efficiency coefficient eta e. The urea crystallization risk coefficient is obtained through comprehensive calculation from the three aspects of quality, temperature and structure, the crystallization risk is quantified through a mathematical method, the urea crystallization threshold value can be obtained through calibration, the urea decomposition detailed mechanism is fused into the model, the chemical reaction path is expressed in the form of a mathematical equation, the influence of an SCR mixer on crystallization is quantified from the angle of SCR conversion efficiency, the urea crystallization risk coefficient is not a fixed formula and can be calibrated according to a bench steady-state test, and the method is deduced based on a urea crystallization basic principle and a mathematical formula and is high in reliability.

Description

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AI Technical Summary

Benefits of technology

The technical effect of this patented technology relates to accurately predicting how well an absorbent article made up of materials will break down when exposed to urination or other liquid waste discharges over time without causing harm during use. This helps prevent leakage problems caused by poor absorption performance due to insufficient material strength that may occur after prolonged exposure for too long periods of time.

Problems solved by technology

This patented technology describes how it can help prevent nitrogen oxide from forming when adding urease catalyst(urea). When this happens, there may be issues like increasing fuel usage or lower conversion efficacy due to excessively decomposed urea that forms deposits over time. To address these concerns, an objective measure called urea slip level has been developed by researchers working together under different scenarios.

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