Condensation water circulating system of power station

Abstract

The invention discloses a condensation water circulating system of a power station. The condensation water circulating system comprises a condensation water pump unit (4), a deaerator water tank (1), a low-pressure heater unit (2), a recycling branch (3), a condensation water supplement water tank (6), and a condensation water recovering branch (7). A control module which responds to a water level signal of the deaerator water tank to adjust rotating speed of three condensation water pumps (43) is arranged on a frequency converter. A deaerator water level adjusting gate and a deaerator water level separating gate are arranged on a low-pressure heater bypass pipe. The invention further discloses another condensation water circulating system of the power station. The another condensation water circulating system comprises a condensation water pump unit, a deaerator water tank, a low-pressure heater unit, a condensation water supplement water tank and a condensation water recovering branch, wherein the a control module which responds to a water level signal of the deaerator water tank to adjust rotating speed of three condensation water pumps is arranged on a frequency converter, and a deaerator water level adjusting gate and a deaerator water level separating gate are arranged on a low-pressure heater bypass pipe. The condensation water circulating systems are used for simplifying pipelines of condensation water.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a condensate circulation system of a power plant. Background technique [0002] Most of the condensate pumps of large thermal power generating units in the prior art have been improved to be driven by frequency converters. The inverter drive has good start-up characteristics and speed regulation performance, and can effectively control the operation mode of the condensate pump, thereby accurately controlling the level of the condensate water and the flow rate. [0003] attached figure 1 to attach image 3 It is the three main electrical system wiring diagrams of the frequency converter and the condensate pump. Among them, attached figure 1 Shown in is the variable frequency drive mode of 2×100% flow condensate pumps, one for two, the maximum flow of each condensate pump is 100% of the maximum flow of the condensate circulation system, and the two condensate pumps are u...

AI Technical Summary

Problems solved by technology

The piping arrangement of the condensate circulation system in the prior art is suitable for systems with constant-speed drive condensate pumps or condensate pumps with poor speed regulation performance

When the condensate pump is improved to the variable frequency drive mode, using such a complicated pipeline setting will cause waste of manufacturing cost and operating cost

That is to say, the condensate circulation system in the prior art needs to be optimized

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