Chemical Water Supply System of Oil & Gas Boiler
Chemical Water supply system includes soften water system, desalted water system, deaerator, water feed pump, water tank, dosing device, etc.
1. To select a water treatment equipment, users are required to provide boiler water quality reports (well water, tap water, surface water, etc.);
1.1 Boiler water treatment system: type selection: For steam boilers, the capacity should be greater than boiler evaporation; For hot water boilers, the feed up water capacity generally depends on the amount of circulating water in the system.
1) Sodium ion exchanger, salt tank, etc.
2) Fully automatic water softener: the requirement of inlet water hardness should be less than 8 mmol/L;
Industrial boiler (pressure less than 2.5 MPa): the outlet water hardness should be less than 0.03 mmol/L;
Main parameters: outlet water flow rate (8t/h, 10t/h, etc.), outlet water quality, double (single) valves and double tanks and other technical parameters.
1.2 Main parameters for Reverse Osmosis(short for RO) water treatment system: technical parameters of outlet water flow rate(60t/h, 100t/h, etc.), outlet water quality, etc.
2. Deaerator: Thermodynamic deaerator (including deoxygenation water pump; control cabinet), pressure deaerator, sponge iron deaerator, analytical deaerator, etc. Boilers above 10t/h require matched deaerator.
The deaerator is divided into low level deaerator and high level deaerator.
3. Water feed pump: the selection is mainly based on the boiler pressure and system resistance.
Water feed pump mainly includes vertical pumps, horizontal pumps, etc.
Main parameters: flow rate, pressure, rotating speed, matched Variable Frequency Motor or Ordinary Motor (power), etc.
4. Water tank: Volume size; Carbon steel, stainless steel (combined type) or other type.
5. Ammonia feeding device and dosing device are mainly used to adjust the boiler water index.
Parameters: pressurized flow rate and pressure; generally there are two pumps and one tank (including control cabinet); two pumps and two tanks (including control cabinet).