Heat pump circulating water regenerative Rankine cycle system

Abstract

The invention discloses a heat pump circulating water regenerating Rankine cycle system, comprising a steam boiler, a steam turbine generator set, a steam turbine steam extraction port, a steam turbine condenser, a steam turbine condensate pump, a heat pump compressor, a heat pump turbine, a circulating cooling water source, and a circulating water pump , Heat pump evaporator, ring water diversion valve, heat pump condenser, heat pump throttle valve, deaerator, feed water pump, injection mixed heater. It is characterized in that: using the high-efficiency refrigeration and heating characteristics of the heat pump, the heat of the circulating water of the steam turbine is used to increase the condensing water temperature of the steam turbine, and the cooling of the circulating water in the heat pump evaporator can also reduce the condensing temperature of the steam turbine. The above improvements can effectively Improve the thermal efficiency of the turbo-generator set.

Description

technical field [0001] The invention relates to a heat pump circulating water regenerating Rankine cycle system, which belongs to the field of power engineering. Background technique [0002] At present, most of the thermal power plants in the world use the Rankine power cycle that has been used for more than one hundred years. It adds multiple steam extraction ports to the steam turbine on the basis of the Carnot power cycle. The steam is used to heat the low-temperature condensed water of the steam turbine, from the low-pressure heater, deaerator to multi-stage high-pressure heater to raise the feed water entering the boiler to near saturation temperature, effectively improving the thermal efficiency of the power cycle. However, the Rankine power cycle still retains a large amount of flashing steam, which needs to be cooled and condensed by low-temperature circulating water. As a result, the circulating water has a lot of heat and becomes high-temperature circulating water...

AI Technical Summary

Problems solved by technology

However, the Rankine power cycle still retains a large amount of flashing steam, which needs to be cooled and condensed by low-temperature circulating water. As a result, the circulating water has a lot of heat and becomes high-temperature circulating water, which is then sent to the cooling tower for cooling and becomes low-temperature circulating water again. The heat removed exceeds more than 80% of the heat loss of the power plant

Although the Rankine power cycle reduces part of the heat loss of the turbine condensate water, a large amount of condensate loss is still taken away by the circulating cooling water

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