Condenser double-constant operation control method and system, and secondary loop system

Abstract

The invention provides a condenser double-constant operation control method and system, and a secondary loop system. The method comprises the following steps of acquiring condenser parameters; judging whether the condenser achieves double-constant operation of a liquid level and pressure or not based on the condenser parameters; and when the condenser does not achieve the double-constant operation of the liquid level and the pressure, adjusting the valve position of a first adjusting valve at a circulating cooling water inlet in the condenser and the valve position of a second adjusting valve at a condensed water outlet in the condenser based on the parameters of the condenser till that the condenser achieves the double-constant operation of the liquid level and the pressure. According to the basic principle of condenser operation, from the thermodynamic angle of equipment operation, a PI control mode is adopted, a current measured value is judged and calculated, and the pressure and the liquid level of the condenser are controlled at the same time through a regulating valve at a condensed water outlet of the condenser and a regulating valve at a circulating cooling water inlet of the condenser; and double-constant operation of the pressure and liquid level of the condenser is realized.

Description

technical field [0001] The invention belongs to the technical field of condensers, and in particular relates to a method, a system and a secondary circuit system for controlling dual-constant operation of a condenser. Background technique [0002] The condenser is an important part of the secondary circuit system. It receives the exhaust steam from the steam turbine and exhaust steam from other equipment through the condenser, and condenses the exhaust steam into water and sends it to the water supply system. The condenser is important for the safety, efficiency, and Stable operation plays an important role. [0003] The pressure of the condenser directly affects the thermal efficiency of the Rankine thermodynamic cycle of the secondary loop system, thus directly affecting the economics of the system operation; too high pressure will reduce the efficiency of the system operation, and too low condenser pressure will cause the condenser Cavitation may occur at the inlet of th...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a condenser double-constant operation control method, system and secondary loop system, which are used to solve the problem of the liquid level and pressure of the existing condenser under different working conditions. Under the condition, the problem of double constant operation cannot be realized

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