Metering pumps for various systems in 2*660MW units
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This post was last edited by Thank goodness you're here on 2015-11-4 at 15:33. I want to know how many metering pumps are required in total for all the systems in a power plant with 2*660MW units, as well as what the flow rates and pressures are. The more specific, the better. Urgent need! ! ! ! ! ! reward_7ree
For metering pumps, if you’re referring to those used for chemical dosing, there is 1 set for boiler dosing, 2 sets for deaerator dosing, approximately 4 sets for desalinated water dosing, and about 5 sets for cooling tower dosing. Assuming one set is used while another serves as a backup, there are at least 12 sets in total. However, the prices vary; for example, high pressure requirements for phosphate dosing in boilers mean that double-diaphragm pumps are used in such cases
This post was last edited by gjn1970 on 2015-10-21 08:59. The dosing metering pumps for the circulating water system in 2x660MW units can be considered as a set for both units together. There are two types of dosing in the circulating water system: first, acid addition to the circulating water, for which there are three metering pumps – two in operation and one as a spare; second, the addition of stabilizers to the circulating water system, also using three metering pumps, with two in operation and one as a spare. Of course, for each of these two sets of metering pumps used for dosing in the circulating water system, it is also possible to use two pumps with one as a spare. As for the chemical dosing system for the water supply system, which includes the addition of hydrazine and ammonia, a unit-based approach is adopted, with each unit being considered separately. For the dosing system of each unit, it is possible to use either one or three metering pumps – two in operation and one as a backup, or alternatively two pumps with one serving as a backup. For drum boilers, there must be a system for adding chemicals to the drum, using trisodium phosphate; this is also a unit-based system, with two units installed per power plant, one of which serves as a backup. In addition, there is chemical dosing for the desalinated water system; two sets are installed, with two units in each set, one in use and one as a backup.