In the fifty-third of the original book of Journey to the West, Tang Yan and his four men passed through the "Western Liang Women's Kingdom". There is no man in this kingdom. The descendants of the family are conceived by drinking water from the lake. We all know that water is the source of life. We have to drink water, wash vegetables, wash laundry, cook... Our daily life is inseparable from water. However, how to avoid the problematic water caused by the mentoring in Journey to the West?
What kind of drinking water environment are we in?
First of all, China's waterworks pump water (river, river, lake, including groundwater) to the water processor of the water plant, after flocculation, sedimentation, filtration, chlorination and other processes, and then transported to The water tank for the secondary water supply finally arrived at our home. In this process, the water source is generally strictly protected by the state and local governments. The pollution of water sources such as development and industry will be severely punished by law, so the water source can be assured. As we all know, the things that grasp the lifeline of the national economy are all state-owned. Therefore, domestic waterworks have high standards for water treatment and mature systems.
At the end of 2006, the state promulgated a new version of the “Sanitary Standard for Drinking Waterâ€, which provides for the implementation of the various factors (physical, chemical and biological) in drinking water and the health of the population in 2007. The statutory health standards issued in a certain form are approved by the relevant state departments. To protect the health of the people and ensure the quality of life of the people.
Where does the pollution come from?
Sources of pollution are often in places where the public does not care much. For example, water towers and reservoirs that have not been cleaned for a long time on the roof of the community, rusted and troublesome water pipes and faucets, all of which breed bacteria and harmful elements. When we drink for a long time, it may cause discomfort.
However, for pollution that is not particularly noticeable, it is difficult to distinguish it by the naked eye. At this time we need water purification equipment.
What should I pay attention to when purchasing water purification equipment?
Filtration accuracy: referred to as filtration degree, filtration efficiency in micron particle count. In fact, it is the pore size of the filter element of the filter, the maximum particle size that allows the passage of impurities when the solution passes through the filter.
Water output: The amount of filtered water produced by filtration through a filter.
Sustainable service life: As the name suggests, the product's sustainable normal use time is affected by factors such as different working principles and usage environment.
Convenience of cleaning & replacement: Based on the characteristics and working principle of different products, the convenience of cleaning and replacement will be different.
First, pre-filtering
Working principle: Pre-filtering is to take a distance from the water pipe at the back end of the water meter, and carry out coarse filtration to filter out large particles: sediment, rust, debris, etc., and carry out a front-end at the front end of the house water inlet. Filtration, filtration of impurities through a small pore filter, to achieve the initial filtration effect.
advantage:
· Provides initial filtration at the front end to extend the life of showers and other water and water equipment.
· No need to change the core, just open the drain valve regularly to clean.
·long life.
· The price is low.
Disadvantages:
• Filtration accuracy is typically 40-90 microns. Only large particles can be filtered.
· Regular manual cleaning. If it is not cleaned in time, it is likely to cause secondary pollution.
Second, ultrafiltration water purifier
Working principle: The pore impurities are filtered out by filtering the membrane and allowing water to pass through the tubular structure with pores. There are different material selections (PVDF, PAN, PVC), and they are also divided into internal pressure and external pressure.
Internal pressure type: the cleaning is simple, the thin tube is easily blocked, and the water quality is strict.
External pressure type: difficult to clean, not easy to be blocked, low water quality requirements.
advantage:
·The filter membrane pore size is about 0.1-0.01 micron. Compared with the pre-filter, the filtration precision is greatly improved, and it can filter more pollutants such as sediment, bacteria and rust.
·The main filter is durable and the replacement time is generally 2-3 years.
• The amount of filtered water is relatively large.
• There is less sewage, and only a small amount of sewage will be there when flushing.
·Low price, high cost performance
Disadvantages:
• Ions cannot be filtered in water, so heavy metal ions, scale, and residual chlorine cannot be filtered.
· Most need to manually clean the filter.
Third, reverse osmosis water purifier
Working principle: Reverse osmosis water purifier is what we often say reverse osmosis, RO membrane. It uses mainly reverse osmosis membrane technology. Its working principle is to exert a certain pressure on water, so that water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts (including heavy metals) dissolved in water, organic matter, bacteria, viruses, etc. are impenetrable. The reverse osmosis membrane is passed through so that the permeated purified water and the impermeable concentrated water are strictly separated.
advantage:
·High filtration precision: the pore size on the reverse osmosis membrane is only 0.0001 micron, while the diameter of the virus is generally 0.02-0.4 micron. The diameter of ordinary bacteria is 0.4-1 micron, so you can safely drink the water from the pure water machine. Clear spring.
Disadvantages:
· Due to high filtration accuracy, the amount of filtered water is low.
· High filtration accuracy will also cause the filter element to be more easily blocked.
· There are manual cleaning & automatic cleaning options, but manual cleaning can extend the life of the filter.
· Producing pure water also produces waste water.
Fourth, multi-stage filter
Working principle: In fact, in addition to the main filter (ultrafiltration water purifier / reverse osmosis water purifier), different filter rods are added before and after, to achieve more effects, like the commonly used ppc activated carbon, adsorption and filtration of particulate matter There are also special filters for scaling (softening the water), as well as special filters for adding minerals.
advantage:
·Because there are more filter choices, you can choose to install the filter according to your own needs.
· Due to the structural design of the multi-layer filter element, the filtration accuracy is higher.
Disadvantages:
· At the same time, due to the structural design of the multi-layer filter element, the amount of filtered water is small.
· Different filter cartridge replacement cycles are different, need to be replaced frequently, and there are more filter elements.
· The price is too expensive, the high investment in the previous period, and the subsequent additional investment price is relatively high.
After the working principle, advantages and disadvantages of various water purification equipment introduced in the above article, it is estimated that everyone has a certain understanding of the water purifier. In fact, in the purchase process, according to the quality of water supply (ie, personal needs) in the area where you live, you should choose the characteristics, advantages and disadvantages of different water purification products. If the filter produces wastewater, it is also necessary to use methods to effectively reuse the earth and save water.
Summary: We usually see a scene in the American TV series. Foreign families drink water and only go to the kitchen with a cup. Just open the faucet and put water to drink. This is unimaginable for us, and it is also temporarily unachievable in China because of various reasons. However, we need to exert subjective initiative to solve the problem, because drinking water and eating is a very important thing, and we must not treat it sloppyly and casually.
CD Car Phone Holder,Car CD Slot Mount Holder,Car Phone Mount Holder,Car Accessory CD Phone Holder
Ningbo Luke Automotive Supplies Ltd. , https://www.car-phone-holder.com