The difference between purified water and softened water Pure water is water obtained by removing rust, sediment, residual chlorine, organic matter, harmful heavy metal ions, bacteria and viruses from water through corresponding filtering materials. Generally it belongs to physical filtration.
Softening water is simply to remove hardness ions in water, such as calcium and magnesium ions, and reduce the hardness of water. Generally speaking, it is a chemical method to replace heavy metal ions such as calcium and magnesium dissolved in tap water with resin.
Pure water can be drunk directly, mainly referring to drinking water.
The softened water from the softened water equipment is not drinkable in principle, and is mainly used for domestic water. Washing clothes with soft water can make them brighter, fluffy and softer. Washing your hair with soft water can make your hair more supple and shiny. Washing your face with softened water can play a cosmetic role. It can be said that domestic water plays a very important role after softening.
Function of softened water Applicable fields of softened water: bathroom, kitchen, laundry, heating, boiler, central air conditioning equipment, water supply and other fields.
Soft water has the following functions:
(1) Prevent household appliances such as water pipes, water heaters, coffee machines, humidifiers, steam irons, bathtubs, shower heads and toilets. Fouling, frequent blockage and low thermal efficiency.
(2) Making coffee and making tea leaves has a unique and pure taste. Raise flowers, prolong the flowering period, the green leaves are spotless and the flowers are gorgeous. Raise fish and prevent all kinds of fish diseases. Soft water cooking is full, fluffy and tastes good; Sanitary ware, crystal clear, without stains and spots.
(3) The shelf life of tofu is prolonged, the soybean milk is more fragrant, and the bean sprouts do not need auxin and thrive. Wash vegetables, remove pesticide components and extend the shelf life of vegetables. Cooking shortens the time, makes rice grains soft and smooth, and pasta is not easy to swell. Cooking retains the natural taste and nutrients of vegetables.
(4) Effectively inhibit fungi, promote wound healing, and reduce the incidence of constipation, gastrointestinal and calculus diseases. When skin injury, frostbite, burn and other accidents occur, wash the affected area with soft water first, and then soak it with absorbent cotton, gauze, towel, etc. Gently rubbing the affected area with soft water can quickly heal the wound and make the edema caused by burns disappear immediately. This is because soft water can promote the regeneration of cell tissue. It can effectively inhibit fungi and promote cell tissue regeneration. When skin injury, frostbite, burns and other accidents occur, washing with soft water can make the wound heal quickly.
(5) Washing clothes, anti-static, decoloring and deformation, cleaning tableware, cleaning without water stains, and improving the gloss of utensils. Clean the kitchen and bathroom, vigorously decontaminate and remove odor. It has a strong detergency. Soft water washing clothes fibers will not be hard and brittle, saving washing supplies.
(6) Soft water fundamentally eliminates water and alkali, makes the equipment run safely, saves expenses, reduces the maintenance cost of water equipment and water pipelines by more than 60%, reduces the fuel cost of hot water by more than 30%, and reduces the purchasing cost of detergent by more than 50%.
Softening water softening principle Resin separation softening water technology is a sodium ion exchange softening method of water, that is, when raw water passes through a sodium ion exchanger, Ca2+ and mg2+ in the water are replaced by Na+ in the exchanger, so that calcium and magnesium compounds that are easy to scale are converted into soluble sodium compounds that do not form scale, and the water is softened. Automatic sodium ion exchanger is mainly composed of multi-way control valve, controller, resin tank (with water distributor inside) and salt tank. The multi-way control valve has multiple valves in the same valve body. The controller sends instructions to the multi-way valve according to the set program, and the multi-way valve automatically completes the opening and closing of multiple valves. So as to realize the procedures of operation, backwashing, regeneration, replacement and forward washing, without setting a salt liquid pump. The equipment is simple, and can be widely used in industrial and civil softening preparation, such as steam boiler water supply, heating and air conditioning, water systems such as pools. Nanocrystalline technology, namely TemplateAsistedCrystallization, uses the high energy generated by nanocrystals to wrap the free calcium, magnesium and bicarbonate ions in water into nano-scale crystals, thus preventing the free ions from generating scale.
Measures to prevent and control microbial pollution of purified water. Purified water is a special product. Once contaminated by a few microorganisms, it may exceed the standard and even lead to flocculent precipitation and other consequences. Therefore, controlling microbial pollution is a very important work for production enterprises. The above analysis shows that the measures to control the microbial pollution of pure water should be comprehensive, and one aspect should not be overemphasized, while other aspects should be ignored, because any link in the production process will be polluted, thus affecting the quality of products.
1, strengthen self-hygiene management, strengthen food hygiene quality awareness, appoint a leader to be responsible for hygiene work, set up full-time hygiene inspection institutions, strengthen the detection of water source, packaging, air and products in the filling room, formulate hygiene management systems from water source management, sterilization, filling and packaging to personal hygiene, designate special personnel to supervise the implementation, strengthen the training and learning of food hygiene knowledge, focus on mastering disinfection methods, and clarify the key links that microorganisms are easy to pollute.
2. According to the characteristics of water source, design the production process reasonably and scientifically, equip with necessary water treatment and production equipment, and choose a sterilization system that meets the disinfection of water quality. In China, ultraviolet, ultrafiltration and ozone are mostly used as disinfection facilities for mineral water and pure water. However, years of experience have proved that the poor reliability of the first two types is the main factor that causes the unqualified products, and ozone sterilization is considered to be the best method at present.
3. Regularly strengthen the cleaning and disinfection of pipelines, containers and filters in the whole production process, and do a good job in disinfection of bottles, lids and filling rooms. It is understood that chlorine dioxide (ClO2 _ 2) is used for disinfection of pipelines and packages of most manufacturers, and has strong oxidation and disinfection effects. However, the quality control of disinfection drugs should be strengthened to ensure its disinfection effect.