The water supply treatment process is based on the difference between the raw water quality conditions and the required water quality. It identifies the water quality indicators in the raw water that do not meet the water usage requirements, and selects one or several unit treatment processes to treat the items that do not meet the water quality indicators to meet the water usage standards.
The principles for process selection in water supply treatment systems are technical feasibility, economic rationality, reliable operation and ease of operation. Meanwhile, the adaptability to changes in water quality and quantity and the resistance to shock are important contents of process evaluation.
The design and selection of water supply treatment process flow and main treatment structures mainly adopt two methods: one is the pilot-scale method, and the other is the empirical method.
The pilot-scale method is adopted because the quality of the raw water varies and the treatment processes are different. To make the system process meet the treatment requirements, it is necessary to optimize the process combination and process parameters, understand the treatment effects of each influencing factor, and thereby provide a basis for determining the system process. The pilot-scale method is particularly important for new process systems, mainly because there is less practical and engineering experience for new processes. The lack of experience in the combination of raw water and process has a wide range of impacts on the effluent quality of large-scale water supply systems, and the construction and operation costs are relatively high. Through pilot tests, a large amount of funds can be saved or engineering errors can be avoided.
The so-called experience-based approach refers to the design and operation experience of water treatment systems under ideal conditions, combined with local conditions, and determining the system process through technical and economic comparisons. The advantages of the experience-based approach lie in its high speed, low cost, and small wind direction.
Yuan LaiEDIThe ultra-pure water equipment uses electro-deionization technology.EDIElectrodeionization is a water purification method that combines the dual advantages of electrodialysis and ion exchange. It does not require acid-base chemical regeneration and can continuously and stably prepare high-purity ultrapure water. Under the action of a direct current electric field, ion separation in water is completed. At the same time, water is electrolyzed to generate hydrogen ions and hydroxide ions, achieving automatic regeneration of the resin without the need to stop the machine for manual regeneration. The pre-treatment combined with reverse osmosis can prevent oxidized substances from damaging the resin, ensuring stable effluent quality and widely meeting the high-standard water usage requirements of various industries.
The non-negative pressure water supply equipment can be directly connected to the municipal water supply network, making full use of the residual pressure of the original network for superimposed water supply. Fully enclosed operation does not require the construction of a domestic water tank, eliminating secondary pollution. Intelligent variable frequency voltage stabilization, energy-saving, quiet and easy installation, it is the preferred equipment for secondary water supply in high-rise residential buildings and commercial buildings.
Constant pressure water supply equipment is widely used in central air conditioning, floor heating, industrial closed-loop water circulation, and boiler systems. It integrates automatic pressure stabilization, automatic water replenishment, automatic exhaust, pressure relief and buffering functions. It stabilizes the pressure in the pipeline network, eliminates abnormal sounds caused by air blockage, and prevents damage from negative pressure and water shortage in the pipeline. It is an essential supporting equipment for HVAC and circulating water systems.
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