The above four water treatment methods, from the long-term development trend, method one is to gradually fade, method two and method three should be advocated, in method two and method three, the key is to select high-quality anticorrosion and scale inhibitor according to three criteria.
2. Oxygen removal method of choice
Heating heating water system in operation is not mainly oxygen corrosion, is mainly CO2 corrosion and corrosion under the scale, CO2 comes from the alkalinity of raw water (HCO3-) thermal decomposition. Dissolved oxygen content in raw water in winter is only about 11mg / L, and the dissolved oxygen in the circulating water mainly from the negative pressure side of the circulating water pump suction and water system leakage when running the wind (forming a negative pressure) of the suction. These two places of air intake leads to circulating water oxygen is tens of times, hundreds of times or more of the dissolved oxygen in the make-up water. The use of solid anticorrosion scale inhibitor is generally no longer deoxidised can be effective corrosion prevention, because it has the following three functions: one, is due to scale and rust removal, it is equal to remove the cathode of electrochemical corrosion, thus preventing the electrochemical corrosion; the second, contains several kinds of Yuk film agent, in the surface of iron to generate a layer of black glossy protective film, which can block the oxygen and carbon dioxide corrosion; the third, which is an alkaline agent, it can rapidly improve the water The third is that it is an alkaline agent, which can rapidly increase the pH value of water. When the pH value is ≥10, the iron is in the passivation zone, and the corrosion is minimum. Anti-corrosion and scale inhibitor has been proved to be a simple and effective water treatment method for central heating system in practice.
02
Water quality treatment and anti-corrosion monitoring technology and instructions
1, the system adopts fully automatic control to run and stop; the system is designed with automatic and manual control modes, which can be switched according to different conditions; the system is equipped with perfect protection devices and monitoring equipment, the control system is controlled by computer programme to achieve positive and negative washing and regeneration functions, to achieve full-automatic control, and real-time status display, and contains remote control functions.
2,Piping and valve parts in the system: the pipeline is made of UPVC, the pipe fittings are required to be made of the same material and brand, and the valves are made of pipeline materials, and the valve materials must meet the national drinking water hygiene standards;
3, softened water system dosing barrel tank can store at least 1 week of dosage, by the liquid level control system;
4, the system of each treatment stage outlet installation pressure gauge;
5, all the equipment of the system in addition to the control room set up control cabinets, are required to set up on-site control cabinets, easy maintenance, and emergency treatment;
6, boiler room softened water system are required to use a standby design to ensure safe and continuous operation.
7, the valve installation location can not be too high, must be convenient for maintenance;
8, the pipeline can not be bent.
9, pump start and stop level control by the tank high and low level sensor control;
10,Full automatic control of operation and flushing function.
03
Features of water softening equipment for heat exchange station
1. High degree of automation Fully automatic water softening device according to pre-set procedures, automatically complete the softening regeneration cycle process, in addition to manually adding regeneration salt regularly without any manual operation, saving a lot of manpower and material resources. The automatic controller or computer automatic controller can easily adjust the operation of the system according to the change of water quality.
2. Stable water quality.
3. High efficiency, low energy consumption, low operating costs Due to the overall design of the water softener is reasonable, and the implementation of strict automatic control, so that the exchange capacity of the resin to ensure that give full play to the salt consumption of the equipment, water consumption and other indicators are significantly lower than the general water softening device compared to the power consumption is significantly reduced.
4. Reliable operation and long service life.
5. Small footprint Advanced process design makes the water softening device compact, covers an area of significantly reduced, saving the building investment.
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