A power plant wastewater evaporation treatment method and its wastewater evaporation treatment system

Abstract

A power plant wastewater evaporation treatment method and its treatment system, including a wastewater evaporator, a condenser and a heat transfer medium heater, part of the water vapor from the wastewater evaporator is sent to the condenser to condense into water, and the other part of the water vapor is collected After being heated by the heat transfer medium heater, it returns to the waste water evaporator to heat and evaporate the waste water; the heat source of the heat transfer medium heater comes from the main steam of the steam turbine or the high-temperature steam extracted from the heat recovery system; the cold source of the condenser Condensate from the steam turbine condensate system at a lower temperature. A part of high-temperature steam is drawn from the steam turbine extraction system or main steam to heat the heat transfer medium, and the condensed water formed after releasing heat is sent back to the steam turbine condensed water system or drainage system. A part of the low-temperature condensed water is drawn from the condensed water system of the steam turbine with a circulating cooling water pump, and all of it returns to the condensed water system of the steam turbine after heat exchange. During the whole process, the loss of heat is very small and will not have any impact on the thermal system of the steam turbine.

Description

technical field [0001] The invention relates to a water treatment technology, in particular to a power plant waste water evaporation treatment method and a waste water evaporation treatment system. Background technique [0002] In the wastewater evaporation treatment process, people are most concerned about the 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, the energy consumption is too high. If reverse osmosis 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. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is aimed at the deficiencies of the prior art, and proposes a power plant wastewater evaporation treatmen...

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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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