1. Constant-voltage frequency conversion: the water supply is required to be 250 tons/hour, and the pressure is maintained at 0.3MPa.
2. Water for workshop: the required water supply is 200 tons/hour, and the hardness is ≤1mmol/L. ..
Three, water supply for 24 hours continuous uninterrupted water supply.
According to the above situation, combined with previous engineering cases, the specific process scheme is as follows.
process flow
Pool → pool filtration → pipeline → frequency conversion water supply system → softening system (running alternately at the same time) → disc filtration → mixer → water use place.
Design basis and indicators
1. 1. According to the Water Quality of Industrial Boilers of the People's Republic of China (GBl576—200 1+0), the water supply of steam boilers and steam-water boilers should generally be treated with chemical water outside the boiler.
1.2, the system operation requires low energy consumption and low cost.
1.3. The system and equipment are designed in a standardized, modular and systematic way.
So as to facilitate quick installation and subsequent system maintenance.
1.4, the equipment selection is advanced in technology, economical and reasonable, safe and reliable, efficient and energy-saving, and the most
The principle is to reduce the maintenance cost as much as possible.
1.5. Advanced foreign products are selected for automatic control equipment and main detection instruments.
It is also a well-known domestic brand.
Four. Process introduction
Constant pressure water supply system
Constant pressure frequency conversion is an ideal water supply equipment which mainly adopts program control technology and frequency conversion speed regulation technology to realize constant pressure water supply, save electricity, worry and safety.
Features: Automatically adjust the number of starting pumps and pump revolutions according to the demand of pipe network to realize constant pressure water supply.
Working characteristics: automatic speed regulation and constant pressure water supply within the flow range of single pump. When a single pump can't meet the demand of the pipe network, automatically add a pump to supply water in parallel. When two pumps still can't meet the demand of pipe network, add a third pump, and so on. When the water consumption is reduced, one power frequency pump is reduced, leaving only one pump for variable frequency operation.
1. This frequency conversion system adopts four pumps, three for use and one for standby, which can work alternately and simultaneously.
2. When the flow of one pump is not enough, the system automatically starts other pumps to work.
3. When one pump fails, the system automatically starts other pumps to work.
4. The system can realize the functions of starting first, stopping first, stopping after starting, and starting after stopping.
5. This system adopts stainless steel multistage centrifugal pump, stainless steel shell, stainless steel impeller and stainless steel shaft, with beautiful appearance and noble quality.
6. Adopt Japanese Sanken frequency converter and French Schneider contactor, with higher configuration, more reliable quality and less maintenance trouble.
7. According to the demand of the pipe network, the pressure is set digitally, and all the running data of the water pump are displayed in Chinese LCD.
Softened water system
1, automatic water softening system:
Considering the large water consumption of this system, the design is carried out from the following aspects:
A, resin softening adopts countercurrent regeneration, because countercurrent regeneration can save 1/3 salt consumption compared with co-current regeneration.
B, the system adopts flow control, which can realize accurate water use, improve the use efficiency of resin and reduce the regeneration frequency.
C, fully automatic control, realize unmanned operation, and avoid man-made accidents.
D, 24-hour continuous water supply,
Because the factory needs water for 24 hours, in order to meet the factory's requirements for water quality and meet the national standards, a multi-tank parallel sodium ion exchange softening system is adopted, which is completely controlled and does not need manual management to ensure that the resin can be fully regenerated when the system is regenerated.
In this scheme, British sodium ion cation exchange resin is selected, which has large exchange capacity, long service life and sufficient regeneration, about twice as much as domestic resin. At present, British bleached resin has an absolute advantage in the global resin production industry, accounting for more than 50% of the global resin sales. After the resin works for a period of time, when most of the resin fails to react, it is necessary to regenerate the resin to restore its softening function. In this design, the automatic control head of filter flow has high degree of automation, stable water supply conditions, long service life and automatic whole process, and only needs to add salt regularly without manual intervention. High efficiency, low energy consumption and low operation cost. The filter tank adopts glass fiber reinforced plastic tank specially used for Beijing water treatment.
2.ASUDE filter:
As an important part of security in this water supply system, Spain's De Azoude filter intercepts all kinds of impurities and suspended substances visible to the naked eye, making the water supplied to the pipeline clean and safe. The centrifugal filtration system of high density polyethylene composite pipe is a new generation filtration system.
1, strong filtration reliability: ASUDE automatic backwashing centrifugal disc has more effective and reliable filtration effect, saves water and energy, and reduces maintenance cost. The key to its unique design lies in the high-precision groove lamination and the exclusive patent ASUDE spiral disc located at the bottom of the lamination.
2. Low maintenance cost: High-density polyethylene composite pipe (HDPE) centrifugal filtration system is adopted to ensure that the maintenance cost of the filtration system is minimized.
3. Various combinations: there are different combinations according to filtration grade, pipe diameter and interface mode. Corrosion resistance and strong durability: the composite pipe made of high density polyethylene (HDPE) has corrosion resistance and oxidation resistance to various chemicals. Suitable for filtration of industrial and exquisite water sources, and can work normally in various harsh environments.
3, pipe fittings
UPVC pipes and fittings with high hardness and strength are adopted.