ELECTRIC POWER SYSTEM
About Project:
The nuclear power station of Daya Gulf
The Ge ＇s
Winding power plant of China of country of Tianjin
Thermoelectric Co., Ltd. of environmental protection of port of Yangzhou
Suzhou Su Zheng thermoelectric Co., Ltd.
North logical sequence harbour power plant of Zhejiang
Reach and draw the special power plant in Inner Mongol
Nuclear power Company of Qinshan
Shanghai Wujing Power Plant
Heat and power plant of emperor’s aunt of Shenyang
Huangshi power plant ” heavy to take the place of ” technological transformation project wait for “little “,etc.
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The vice impeller sealing refers to the submersible pump
The so-called vice impeller sealing refers to the submersible pump impeller near the reverse direction to install a coaxial open impeller. When the pump impeller, vice rotated together with the pump shaft of liquid will also vice impeller rotates, the liquid will produce a rotating centrifugal force, the outward flow of centrifugal hand against mechanical seal liquid, reduces the mechanical seal pressure. On the other hand stop medium solid particles into the mechanical seal, reduce the friction pair of mechanical seal grinding block wear and prolong its service life.
But deputy impeller sealing effect, still can rise to reduce axial force, in the submersible sewage pumps axis powers to the liquid in the impeller role if the differential pressure and the rotating parts of gravity, the two force direction is the same, is by adding two forces.
It can be seen in exactly the same performance parameters, under the situation of submersible sewage pump of axial force to pump more than general horizontal and vertical pumps to more difficult than the balance. So in the submersible sewage pumps, bearing damage easily its reason and axial force has a great relationship.
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Some details need to be pay attention when place the order
If you prepare to place order in our Nanjing Forever Sewage Treatment Equipments Co., LTD, please pay attention to the following details:
1.Payment
We can accept L/C, T/T, etc
2.Delivery
Normal product: 30 days for manufacture
Special request product: 2 months for manufacture
3.Package
Fumigate-free Wooden case by sea
4.Quality guarantee
Guarantee period: 12 months after delivery of goods, if have quality question, we will provide the damaged parts free of charge.
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How to select correct model
Pls submit specification of pump to our company, we will select correct model for you.
Or you can select correct model by yourself according to our catalogue.
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An important process of sewage pump-mixer test
Do you want to know how the mixer of sewage pump work? Please watch this video. Mixer are widely used in waste water treatment plants and industry process to agitate the suspended substances contained water, watery slurry, icy water, liquid from industry process, roast liquid, etc.
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Significance of Water Environment Protection
Recent years, with the acceleration of urbanization and the development of rapid population growth, the economy, water shortages and degradation of water quality issues have become increasingly prominent. Some areas due to the uneven distribution of water resources, development and utilization of water resources and water shortages in short supply, causing water shortage of resources. In some areas the number of adequate water resources, water environment pollution of the water body no longer has the original function, there has been living near rivers but no water to drink, no water phenomenon. 
Deterioration of water quality of the environment can lead to reduced use of water resources, leading to lack of water. Water conservation tasks are: to implement unified management of watershed as a unit on the water environment, the development of river basin water resources protection plan, delineation of water function area, water quality control objectives to develop, implement total amount of emissions control, water quality monitoring network set up and sound watershed, water regularly published bulletin, defense and other water pollution accident, prompting the basic objectives of protection of water resources, making water better for people’s life and economic development.
Nanjing Forever Sewage Treatment Equipments Co., LTD. manufactures sewage pumps, which plays an important role in the water pollution control, if you have any query,please feel free to contact us.
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Development of pump industry equipment
Along with industrial pumps are undertaken and carried out together. In the 19th century, foreign countries have had the perfect match types and varieties of pumps, and have been widely used. According to statistics, around 1880, generally use centrifugal pump output accounted for more than 90% of the entire output of a power unit with pumps, chemical pumps, mining pumps and other special use of pumps, only about 10% of the pump output. By 1960, the use of the pump is usually only 45%, and especially useful pump accounted for 55%. 
According to the ongoing trend, especially use of the pump, the pump will have to progress than the usual share of useless. In the early 20th century, the first submersible sewage pump successfully developed by the United States, use it to replace deep-well pump. Subsequently, the Western European countries have also carried out research and development, and continue to improve gradually improve. Such as the Rhine lignite mines in Germany, using a variety of submersible sewage pump more than 2,500 units, the highest capacity of 1600kW, head 410m. China submersible sewage pump is a 1960s era unfolded, during which the work surface submersible pumps used to irrigate farmland in the south already, and small and medium-capacity submersible pump series has been constituted and put into batch production up. Large-capacity high-voltage submersible pumps, submersible motors have also come out,large submersible pumps which are 500-1200kw have been put into operation at the mine.
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Water Pollution
The topic of water pollution continue to be raised, especially groundwater pollution problem, Hangzhou, Wenzhou and other places. farmers or entrepreneurs funded to please environmental protection bureau swim the river, in order to arouse attention to the severity of water pollution, although each environmental protection bureau have chosen silence or denial, but the awakening of public awareness of environmental protection, the degree of concern about water pollution reached unprecedented.
Surface water pollution is obvious that groundwater pollution is shocking. China’s 1.3 billion people, 70% of drinking groundwater, more than 660 cities in more than 400 cities with groundwater as a source of drinking water. But according to reports, over 90% of urban groundwater has been contaminated.
Another set of data also showed that the groundwater is facing serious challenges. In 2011, Beijing, Shanghai and other nine provinces of 857 monitoring wells within the jurisdiction been evaluated water quality class I, class II monitoring wells accounted for 2%, while Class IV, Class V monitoring wells up to 76.8% .
Nine provinces, the water quality was undoubtedly the best is Hainan Province, mainly in Class II; Shanghai, Beijing followed, mostly Class III; Heilongjiang and Jiangsu accounted for the highest places Class IV, and Jilin, Liaoning, Guangdong Ningxia four provinces generally only reach the level of V class.
Growing water pollution, so that the sewage treatment and recycling industry has been unprecedented attention the past two years, the regional gross margin remained at 70%, and even more than 100% in some areas, industry development potential is very large.
Sewage treatment requires the use of a device comprising: a sewage treatment pond, submersible sewage pump, submersible mixer, purification pools.
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Submersible sewage pump can be used for a variety of jobs
Special attention to the type of ESP is required when using certain types of liquids. ESP’s commonly used on board naval vessels cannot be used to dewater contaminated flooded spaces. These use a 440-volt A/C motor that operates a small submersible pump.
It can also be used out of the water, taking suction with a 2-1/2 inch non-collapsible hose. The pumped liquid is circulated around the motor for cooling purposes. There is a possibility that the gasoline will leak into the pump causing a fire or destroying the submersible pumps, so hot water and flammable liquids should be avoided.
Submersible sewage pump can be used for a variety of jobs including draining pools and flooded basements, or even regularly maintaining water levels in water storage areas. The basic utility pump is a device that, when submerged in water, pumps water from below its casing through a connected hose to an outfall area. There are a variety of pumps on the market, but here is the basic process of using this type of utility pump, regardless of application.
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The Features of Submersible Agitator
Submersible Agitator divided into two categories: Mixing series and low speed push flow series.
Mixing series mainly used in wastewater treatment plants, which to flow stirred sewage containing suspended solids. It has high precision and large thrust.
Push products using low-flow cycloid reducer, equipped with low-power, low-speed, large impeller diameter, wide service area. Impeller made of polyurethane material and cast aluminum, high-strength, corrosion resistance, in addition to the stirred functions, also has the function of plug flow and create water.
They must be completely submerged during operation, or will cause the motor idling even burning motor, working medium temperature should not exceed 40 degrees Celsius. PH medium between 5-9, medium density does not exceed 1150Kg / m3, diving deeper than 20M.
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