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7 Points to Note when Selecting Metering Pumps
The metering pump, also known as the quantitative pump or proportional pump, is a special positive displacement pump that can meet the requirements of various strict process flows. Its flow rate can be adjusted steplessly within the range of 0-100%, and it is used to transport liquids (especially corrosive liquids). It is a commonly used accessory in water treatment equipment. Now let's talk about 7 points to note when selecting a metering pump. 1. The rated pressure of the metering pump selected for operating pressure should be slightly higher than the actual required pressure, ranging from 10% to 20%. Excessive pressure will waste energy, increase the investment and operating costs of equipment, so do not choose too high pressure. Second, the flow rate of the metering pump selected for operation should also be measured. Required flow rate. The application range of the flow rate of the metering pump is 30% to 100% of the rated flow rate range of the metering pump. At this time, the repeatability accuracy of the metering pump is high. From the perspective of operating costs
Details >Comparison of cation (001*7), anion (201*7) and mixed bed resin regeneration methods
Ion exchange resins are commonly used in water treatment in our production and daily life. To make full use of them and bring us more reasonable and effective convenience, the following compares the regeneration methods of cationic (001*7), anionic (201*7) and mixed bed resins. 1. 001× 7 Cation exchange resin 1. Pretreatment of the resin: Load the resin into the exchanger and backwash it with clean water. The effluent is clear as. First, introduce approximately 4%NaOH, which is twice the volume of the resin. Soak the resin in the latter volume of NaOH solution for 4 to 8 hours, then rinse with clean water until the pH is around 9. Next, introduce about 4%HCl, which is twice the volume of the resin. Soak the resin in the latter volume of hydrochloric acid solution for 4 to 8 hours, then rinse with clean water until the pH is around 5. 2. Regenerate A. Use about twice the volume of resin
Details >The activated carbon filter is a commonly used water treatment device. As a pretreatment for the water treatment desalination system, it can adsorb the residual chlorine that cannot be removed in the previous stage of filtration, effectively ensuring the service life of the subsequent equipment, improving the quality of the effluent, and preventing pollution, especially the free residual oxygen poisoning pollution of the reverse osmosis membrane and ion exchange resin in the subsequent stage. It also adsorbs small-molecule organic substances and other pollutants that leak from the previous stage. It has a relatively obvious adsorption and removal effect on water odors, colloids and pigments, heavy metal ions, etc., and also has the function of reducing COD. The SDI value of the RO feed water can be further reduced. The specific functions of the activated carbon filter include: 1. Removing color and odor; 2. It can adsorb organic matter, colloidal particles and microorganisms in water. 3. It can adsorb oxygen, ammonia and bromine
Details >Classification and water quality standards of laboratory ultrapure water equipment
Laboratory ultrapure water equipment is a specialized pure water preparation device for experiments in laboratories and tests in testing rooms. It is particularly suitable for application in testing, scientific research institutions, hospital testing rooms and laboratories, etc. Laboratory ultrapure water equipment can be regarded as a second-generation product in terms of grade, with the first generation being the traditional distiller. Now let's talk about the classification of laboratory ultrapure water equipment and water quality standards. I. Classification of Laboratory Ultrapure Water Equipment Types 1. Conventional analytical Ultrapure water machine. This relatively common type of equipment is more suitable for routine analytical experiments and buffer solution preparation, etc. 2. Low organic matter type ultrapure water machine, which focuses on removing organic matter from water, is more suitable for liquid chromatography, gas chromatography, total organic carbon analysis, toxicology research, environmental protection experiment analysis, etc. 3. Non-heat source type ultrapure water machine, this type of ultrapure water machin
Details >Pharmaceutical factory ultrapure water equipment must be strictly implemented in accordance with GMP standards. The relevant material selection and installation standards are as follows: 1. The design, selection and installation of pharmaceutical ultrapure water equipment should meet production requirements, be easy to clean, or be convenient for production operation and maintenance, and be able to prevent errors and reduce pollution. 2. The surfaces of the equipment in direct contact should be smooth, flat, easy to clean, corrosion-resistant, and not undergo chemical changes or adsorption. The lubricants, coolants and other substances used in the equipment must not cause contamination to or to the containers. 3. The main fixed pipelines connected to the equipment should be marked with the names and flow directions of the materials inside the pipelines. 4. The preparation, storage and distribution of purified water and water for injection should be capable of preventing the growth and contamination of microorganisms. The materials used for storage tanks and conveying pipelines should be corrosion-resistant
Details >
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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