Performance Prediction and Control System of Capacitive Deionization and Ammonia Removal by Flowing Electrode
A technology of capacitive deionization and control system, applied in control/manipulation system, separation method, dispersed particle separation, etc., can solve the problems of lack of mechanism and model prediction analysis, inability to form ammonia removal performance, prediction and control system, etc. The effect of reducing rotational speed and power output value, low energy consumption and high removal efficiency
Active Publication Date: 2022-05-10
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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[0006] However, the research on the existing FCDI model is only focused on the removal of NaCl, and the research on ammonia removal is currently only in the experimental stage to determine the approximate optimal working conditions and energy consumption. There is no further mechanism and model prediction analysis, so now Some research results cannot form an overall ammonia removal performance prediction and control system
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[0154] Taking the simulated wastewater of 1g / L NaCl and 76.43mg / L NH4Cl as an example, the current density applied to both ends of the FCDI device is 21.85A / m2, the mass fraction of activated carbon in the electrode solution is 10%, and the wastewater is pumped into the desalination chamber from the water tank. The flow rates are 0.7, 1.2, 1.69, 2.4 and 3.1mL / min, respectively. Substituting the experimental data into the model as the basic iterative data can solve the combination of process parameters that make the removal efficiency and energy consumption reach a relatively ideal state. At this point the model for NH4 + The simulation accuracy of removal efficiency reaches 93.8%, which proves the effectiveness of the model. When the influent flow rate is 1.24mL / min, the ammonia removal efficiency is 75.1% and the energy consumption is 31.27kWh / kg N calculated by the model, reaching an ideal state.
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The invention relates to a flow electrode capacitive deionization (FCDI) ammonia removal performance prediction and control system. Specifically, the prediction model provided is used to solve the effluent NH of the FCDI device. 4 + The influent flow rate and the applied current value required for the concentration to stabilize at its target value are set as the set value of the influent flow rate and the applied current of the FCDI device; then the pump is controlled by a computer The speed adjustment and the current output value of the power supply make the water inlet flow rate and applied current of the FCDI device stable near the set value. The present invention can predict, directly influence or control FCDI device outlet water NH 4 + The purpose of the concentration; it is helpful to optimize the ammonia removal process, improve the performance of FCDI device ammonia removal in a targeted manner, solve the problem of lack of theoretical guidance in the current FCDI ammonia removal process, and improve the NH in the effluent of sewage plants 4 + The removal effect and the level of energy saving and consumption reduction.
Description
technical field [0001] The invention relates to NH in sewage treatment 4 + Concentration automatic control technology field, especially related to a flow electrode capacitive deionization technology based on precise water flow rate and external current regulation system of water NH 4 + concentration control system. Background technique [0002] With the vigorous development of the industrial economy and modern agriculture, a large amount of nutrients flow into the receiving water body, resulting in eutrophication of the water body, affecting the growth and reproduction of aquatic organisms, causing huge ecological and economic losses, and may cause human health and environmental problems. Potential safety hazards, among which nitrogen nutrients are one of the important factors causing eutrophication and pollution of water bodies. [0003] In addition, due to the limitation of environmental capacity, even if the ammonia nitrogen in the domestic sewage tail water reaches t...
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IPC IPC(8): C02F1/469G06F30/20G06F17/12C02F101/16
CPCC02F1/4691C02F1/008G06F30/20G06F17/12C02F2101/16
Inventor 王宏洋李翱朱光灿赵晓丽孙宇巍张明慧汪霞
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI