An indispensable water tank for urban water supply

There is a common phenomenon of insufficient water supply pressure in urban water supply in our country. Usually, water storage tanks are built at the top of buildings, water pumps are used, or water is supplied to the water tanks using the pressure of the pipeline network during low water periods. Then, the water pressure in the water tanks is used to supply water to users. So the water storage tank plays a role in regulating the coefficient of time variation and is an auxiliary regulating water tank for the water supply system. Without it, the pressure of the factory water must be increased to meet the needs of users, which wastes a lot of electricity. Roof water tanks usually rely on float valves to automatically fill water at night when there is no shortage of water. For example, in Shanghai, there are seventeen administrative districts, with an average of7000If there is a rooftop water tank, there will be approximately 17 administrative districts120000A rooftop water tank. If each water tank has an average storage capacity8Ton of water120000Just one water tank can store it960000Ton of water. If the water supply scale is1400Ten thousand tons/Day, then,960000A ton of water accounts for nearly7%Speaking of7%The regulating ability of the roof water tank will save a lot of electricity and investment in the water supply and distribution network. The roof water tank is an indispensable and important part of water supply energy conservation. So the water storage tank is currently a very important component of China's urban water supply system. It can not only play a significant regulatory role, save electricity and reduce investment in the transmission and distribution pipeline network, but also reduce pipeline pressure and improve the safety of pipeline water supply. Therefore, the water storage tank will exist for a long time.

The importance of secondary water tank disinfection:

The main problem with untreated water in water tanks is that after the tap water is transported through pipelines and stays in building water tanks, the water comes into contact with the air, and microorganisms grow in the water tank in a humid environment, as well as in the stagnant water area of the water tank, resulting in a decrease in water quality. For example, there are 120000 rooftop water tanks in Shanghai. According to the report from the national health and epidemic prevention department, the unqualified water quality and hygiene indicators of secondary water tanks and water tanks account for more than 90% of the unqualified water use rate of users. For example, in Guangzhou, Shanghai and other places, "red worms" appear in water pools and tanks. If the water in the fire water tank is left untreated for a long time, it is more likely to breed bacteria and microorganisms, and produce unpleasant odors.

The traditional solution is to regularly clean the water tank. The domestic water tank of a typical building is cleaned every 3-6 months, and the water supply needs to be stopped during the cleaning process, causing inconvenience to users. After cleaning the water tank, there may be yellow water or residual chemical agents in the pipeline, which poses a threat to the health of users. Between two cleaning operations, it cannot be guaranteed that the hygiene indicators of domestic water fully comply with national standards. The quality of domestic water cannot be guaranteed at all times. Regular cleaning cannot solve the problem of "red worms" in the water tank.

In response to the above situation, our company has successfully developed the PDII-HB water treatment machine. This equipment continuously processes the stored water in the water tank, effectively disinfects and purifies the water tank, the inner wall of the water tank, the inner wall of the pipeline, and the faucet. At the same time, it can also activate water molecules and make water molecule clusters smaller. Long term consumption is harmful to human health.

The PDII-HB water treatment machine adopts advanced microcomputer control technology for intelligent and fully automatic operation, with no vulnerable parts, no need for chemical agents, and no need for dedicated personnel to manage. The equipment is treated with rain and frost protection, and can be installed outdoors. The equipment can be remotely monitored indoors for operation.

Working principle of sterilization and algae killing:

PDII－HBThe water treatment machine is used for purifying the water quality for the growth of microorganisms (such as bacteria and algae), and its principle is toPDII－HBAfter electrolysis treatment by a water treatment machine, the ecological environment of bacteria and algae in the water changes, and their living conditions are lost and they die. Specifically manifested in four aspects:

Every living organism has its specific biological field for survival. The distribution and movement of electric charges within living organisms are influenced by changes in the electric field of the external environment, thereby affecting the life activities of the organism. Living organisms on Earth can generally only adapt and survive to the electric field strength on the Earth's surface（130V/m）Changing the electric field strength can alter the electric field strength or affect bacteria（E，COLI）The physiological metabolism of bacteria, such as gene expression programs, enzyme activity, etc., causes abnormal survival, which is one of the reasons for bacterial death.

The cell membrane has many channels. Through these channels, cells communicate with their surroundings. These channels are composed of individual molecules or molecular complexes that allow ions to pass through. The regulation of ion channels affects the life and function of cells. The external electric field disrupts the ion channels on the cell membrane, changes the internal control current that regulates cell function, and thus affects bacterial life. The liquid containing bacteria flows through a strong electric field, causing an instantaneous change in current to pass through the liquid. Cells on the conductive pathway are killed by the high-speed movement of electrons, achieving the purpose of sterilization.

During the electric field treatment of water, dissolved oxygen is activated to produce O2-· OH, 1O2, and H2O2 are reactive oxygen species (O2- is a superoxide anion radical· OH is hydroxyl

Free radicals, 1O2 is singlet oxygen, H2O2 is hydrogen peroxide). Reactive oxygen species are the strongest bactericidal substances, as shown in the figure on the right. They can produce a series of oxidative effects on microbial organisms and are the main cause of microbial death. (1) O2- can damage important biomolecules and cause damage to microbial organisms; (2) O2- increases microbial membrane lipid peroxidation and accelerates death.

Due to the physical changes of water molecules under the action of low voltage electric field and the presence of a small amount of oxidizing substances in the effluent of the processor, the antibacterial effect lasts for 48 hours.

Technical features:

Efficient pulsed low-voltage electric field generates reactive oxygen species, killing bacteria and algae, with broad-spectrum and high efficiency;

The one-time sterilization rate is 99.99%, and the sterilization ability is dozens of times that of ordinary fungicides;

Kill Legionella bacteria, meet international standards, and prevent 'Legionella SARS';

Oxygen sterilization mechanism, without the production of three pathogenic substances;

The equipment casing has five layers of anti-corrosion and insulation treatment, and can be installed outdoors to prevent rain and freezing;

Only requires electrical energy, no chemical agents, completely environmentally friendly;

Unique long-life design, with core components that have a lifespan five times longer than similar products

Clarify the working principle of turbidity reduction:

Low voltage electric field treatment reduces the Zeta potential of small colloidal particles in water, making them easier to aggregate and grow, and remove them through filtration or precipitation, achieving or even surpassing the effectiveness of water quality coagulants.

Working principle of anti-corrosion:

Reactive oxygen species form an oxide film on the new pipe wall.

Microbial corrosion and sedimentary corrosion are inhibited.

effect:

After disinfection by the water treatment machine, the total number of bacteria and Escherichia coli in the water quality meet the national "Sanitary Standards for Drinking Water" (GB5749-85)

The secondary water tank and pool comply with the "Sanitary Code for Secondary Water Supply Facilities" (GB17051-1997)

Continuous antibacterial time up to 48 hours

● Improve water turbidity, total iron, and organic matter indicators

● Improve water quality scaling performance

Protect metal water pipelines and slow down corrosion

Activate water molecules, beneficial for human health

Product selection reference table:

Selection Notice:

1) The PDII-HB water treatment machine adopts a built-in circulation pump to extract water from the pool, and then the pressure water from the circulation pump is released to the water inlet of the pool after being disinfected by the equipment.

2) The water treatment machine should be installed as close to the water tank as possible, and the intake and return pipes should be kept as short as possible. However, the intake and return ports of the water tank should be kept as far away as possible to prevent short circuits in the treated water.

3) The water treatment machine takes water from the water tank (pool) near the outlet pipe.

4) After treatment by the water treatment machine, the return water is directed to the top of the water tank (pool) near the inlet. A return water outlet can be opened, Ф=50。 The depth of inserting the return pipe into the water level of the pool is ≥ 2/3H.

5) The distance between the water treatment machine and the water tank (pool) wall should be ≥ 0.6m, and there should be at least 0.5m of operation and maintenance space in front and behind the water treatment machine. The inlet pipe, outlet pipe, and drainage pipe of the water treatment machine should be connected with flexible joints for maintenance purposes.

6) The pipes for water intake, return, and discharge can be made of PVC or galvanized water supply pipes.

7) Install a Y-shaped filter on the water intake pipe to protect the circulating water pump inside the PDII-HB water treatment machine.

8) The sewage outlet of the water treatment plant should be equipped with necessary sewage pipes connected to the drainage ditch.

9) The water treatment machine is operated automatically by a microelectrolysis computer, and does not require dedicated supervision during normal operation. When there is no water, the water treatment machine can automatically detect and automatically turn off the power to protect the water pump and water treatment electrodes.