Power plant waste water evaporation treatment method and waste water evaporation treatment system thereof

Abstract

The invention relates to a power plant waste water evaporation treatment method and treatment system thereof, which comprises a waste water evaporator, a condenser and a heat transfer medium heater, wherein one part of water vapor coming out of the waste water evaporator is sent to the condenser to be condensed into water, and the other part of the water vapor is collected and sent to the heat transfer medium heater to be heated up and then returned to the waste water evaporator to heat and evaporate waste water; the heat source of the heat transfer medium heater is from steam turbine main steam or high-temperature steam pumped out of a heat return system; the cold source of the condenser is from condensed water of a steam turbine condensed water system with lower temperature.A part of high-temperature steam is led out from a steam turbineextraction system or the main steam to heat the heat transfer medium, and condensed water formed after the heat is released is sent back to the condensed water system or a hydrophobic system of the steam turbine.A part of low-temperature condensed water is led out from the condensed water system of the steam turbine by using a circulating coolingwater pump, and the low-temperature condensed water is completely returned to the condensed water system of the steam turbine after heat exchange. The heat loss is very small in the whole process, andthe heat loss does not affect a thermal system of the steam turbine.

Description

technical field [0001] The invention relates to a water treatment technology, in particular to a power plant wastewater evaporation treatment method and a wastewater evaporation treatment system. Background technique [0002] In the wastewater evaporation treatment process, people are most concerned about energy consumption, especially the wastewater discharged from the flue gas desulfurization and denitrification system of power plants is very difficult to treat. If the current evaporation method is used for treatment, the energy consumption will be too large. If reverse osmosis treatment is used, the concentrated water must be evaporated at the end, which also consumes a lot of energy. Moreover, the system is too complicated, and the operation, treatment and maintenance costs are also very high. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a power plant wastewater evaporation treatment method with low energy...

AI Technical Summary

Problems solved by technology

[0002] In the wastewater evaporation treatment process, people are most concerned about energy consumption, especially the wastewater discharged from the flue gas desulfurization and denitrification system of the power plant is very difficult to treat. If the current evaporation method is used to treat it, the energy consumption will be too large

If reverse osmosis treatment is used, the concentrated water must be evaporated at the end, which also consumes a lot of energy. Moreover, the system is too complicated, and the operation, treatment and maintenance costs are also very high.

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