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Tianjin Xun'er Technology Co., Ltd
Date: 2025-03-13Read: 7
Application of electromagnetic flowmeter in the zero discharge process of desulfurization wastewater in power plants
background
A certain cogeneration enterprise in Jiangsu province has an early boiler design. In order to improve the combustion efficiency of the boiler, the enterprise has launched a comprehensive optimization and renovation project for the construction of a smart power plant. Due to the complex and varied composition of the company's coal, in order to meet the requirements of the "Action Plan for Water Pollution Prevention and Control" and the "Implementation Plan for Pollutant Emission Control Permit System", the desulfurization equipment and process flow have been optimized to achieve zero discharge of wastewater.
Measurement requirements
The general process of desulfurization technology in power plants is "pretreatment+concentration and reduction+end solidification". Firstly, the wastewater is pretreated, then the water volume is concentrated, and finally, the concentrated wastewater is solidified.
Due to the small amount of desulfurization wastewater in the factory, the flue evaporation method is directly used for solidification treatment after pretreatment. A flow meter needs to be installed between the two stages to measure the flow rate of desulfurization wastewater entering the drying tower, providing data support for the operation and regulation of desulfurization equipment, and ensuring the desulfurization effect. The power plant controls the amount of desulfurization wastewater sprayed into the drying tower, and the online desulfurization wastewater volume remains stable at around 0.5t/h, with a DN10 diameter pipeline. Require flow measurement to be corrosion-resistant, accurate, and have stable product performance.
Xun'er Solution
After communicating with the customer on site, it was learned that the customer requires three instruments with the same process flow and function to monitor the amount of wastewater discharged after desulfurization. The three instruments are located between the desulfurization and the drying tower. Considering that the desulfurization wastewater discharged from thermal power plants mainly comes from the external drainage of the absorption tower during the wet flue gas desulfurization process. Although large suspended particles, calcium and magnesium hardness ions, and some heavy metal ions are removed from the wastewater through the pre process, the wastewater still contains heavy metal elements, chloride ions, etc., which are highly corrosive and require high anti-corrosion requirements for equipment and pipeline materials. Therefore, we choose electromagnetic flow meters with anti-corrosion and explosion-proof functions for our customers.
Customer benefits
Customer feedback: These three electromagnetic flow meters have been in use since September 2023, with stable performance and accurate measurements. Accurate measurement data enables enterprises to quickly respond and adjust the operating parameters of desulfurization equipment, ensuring optimal desulfurization efficiency,Greatly improved production efficiency. In addition, the customer highly praised the technical support and solutions provided by the Xun'er customer service team during the early selection, installation, and commissioning stages.
Recommended on-site application products
Product Features:
●Suitable for measuring conductive liquids, especially suitable for media such as sewage, chemical solutions, tap water, etc;
●Accuracy levels of 0.5 and 0.2;
●Low flow rate measurement, capable of measuring a flow rate of 0.1M/s;
●The instrument diameter covers DN4~DN2000;
●Equipped with explosion-proof function, with protection levels of IP65 and IP68;
●Multiple communication methods such as RS485, HART, 4G, NB-I0T are available for selection.