1. Control of inlet flow rate
The regulation of water production rate of industrial high pure water ultrapure water equipment is closely related to the inlet flow rate. At the front end of the equipment, by installing high-precision flowmeters and regulating valves, the raw water flow entering the equipment can be accurately controlled. If the water production rate needs to be increased, the inlet flow rate can be appropriately increased within the range allowed by the equipment. But this is not a simple linear relationship, because excessive inlet flow may cause excessive pressure in subsequent treatment units, affecting the treatment effect and equipment life. For example, in a reverse osmosis system, excessive inlet flow may cause the water flow rate on the membrane surface to be too fast, reducing the contact time between water and membrane and reducing the removal efficiency of salt and impurities. Therefore, it is necessary to reasonably adjust the inlet flow rate according to the specific design parameters and operating status of the equipment to indirectly regulate the water production rate.
2. Pressure regulation mechanism
Pressure is another key factor in regulating the water production rate. In the core processing units of many high-purity water ultrapure water equipment, such as reverse osmosis and ultrafiltration processes, pressure plays a vital role. The operating pressure of the entire system can be adjusted by booster pumps and pressure regulating valves. When the pressure is increased, water molecules pass through the semipermeable membrane faster under pressure drive, thereby increasing the water production rate. However, there is also a risk of excessive pressure, which may cause irreversible damage to the membrane, such as membrane rupture or deformation. Therefore, the equipment is usually equipped with a pressure sensor to monitor the pressure changes in real time and connect to the control system. The operator can accurately adjust the pressure according to the data fed back by the sensor and the pressure tolerance range of the equipment to achieve the ideal water production rate.
3. Equipment operation mode and parameter setting
Industrial high pure water ultrapure water equipment usually has a variety of operation modes to choose from, which will affect the water production rate. For example, some equipment has single-stage or multi-stage filtration mode. In the single-stage filtration mode, the water only undergoes one major filtration treatment, and the water production rate is relatively fast, but the water quality may be slightly inferior; while the multi-stage filtration mode can obtain higher quality ultrapure water, but the water production rate will be reduced because the water passes through multiple treatment links. In addition, various parameter settings in the equipment, such as operating time, flushing frequency, etc., will also affect the water production rate. Reasonable adjustment of these parameters, such as reducing unnecessary flushing times or shortening flushing time (without affecting the normal operation of the equipment and water quality), can increase the actual water production rate of the equipment.
4. Collaboration of post-processing units
The regulation of water production rate also involves the coordinated work of various post-processing units in the equipment. For example, the exchange capacity and regeneration frequency of the ion exchange resin bed will affect the water production rate of the entire system. If the ion exchange resin is close to saturation, the residence time of water in the resin bed will increase, thereby reducing the water production rate. At this time, timely regeneration of the resin and restoration of its exchange capacity can make the water flow smooth and increase the water production rate. Similarly, in the terminal sterilization and ultrafiltration fine treatment units, if the processing capacity of these units does not match the water production rate of the front end, it will also cause the water production rate of the entire system to be limited. Therefore, it is necessary to comprehensively evaluate and optimize each treatment unit to ensure the synergy between them to achieve effective regulation of the water production rate.
