Adaptive process control system of condenser for ship and method for implementing adaptive process control system

Abstract

The invention discloses an adaptive process control system of a condenser for a ship, and relates to the field of control for condensers for ships. The adaptive process control system comprises a control unit, an operation display unit, a regulating valve of a circulating water pump, a water level regulating valve, a regulating valve of an air ejector, a thermal deaeration regulating valve, a condensate temperature sensor, a circulating water inlet temperature sensor and a steam flow sensor; the operation display unit, the regulating valve of the circulating water pump, the water level regulating valve, the regulating valve of the air ejector, the thermal deaeration regulating valve, the condensate temperature sensor, the circulating water inlet temperature sensor and the steam flow sensor are respectively connected with the control unit; the four regulating valves are connected with the operation display unit; and the operation display unit is further connected with a pressure sensor and a water level sensor. The operation display unit displays data of the pressure sensor and the water level sensor, transmits operation signals to the four regulating valves and transmits manual / automatic signals of the regulating valves and the data of the sensors to the control unit; and the control unit receives the data and valve position feedback signals of the four regulating valves and simultaneously transmits valve position control signals to the corresponding regulating valves. The adaptive process control system has a condenser process control strategy self-adaptation function specific to different control modes, and the reliability and the safety of the process control system of the condenser for the ship are improved.

Description

technical field [0001] The invention relates to the field of marine condenser control, in particular to an adaptive marine condenser process control system and an implementation method thereof. Background technique [0002] As a cold source, the marine condenser is an important equipment to ensure the stable operation of the steam power plant. When the condenser control system fails, it will affect the normal operation of the condenser, thereby affecting the operation of the marine main and auxiliary engines, reducing the operating efficiency, and even directly affecting the safety of the marine steam power plant. [0003] The marine condenser process control system mainly includes three parts: the condenser pressure control system, the condenser water level control system and the condenser condensate subcooling control system, which are collectively referred to as the condenser process control system. The main function of the marine condenser pressure control system is to ...

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Problems solved by technology

[0004] Usually, the marine condenser pressure control system adopts the scheme of directly controlling the condenser pressure by controlling the speed of the circulating water pump. The disadvantage of this scheme is that it has poor adaptability to the fault conditions of the control system sensor, regulating valve, etc.

The normal water level control method of the marine condenser is mainly to adjust the water level of the condenser through the opening of the three-way valve. The disadvantage is that under the condition of the ship with a large change of working conditions, the control stability time is longer and the adaptability to the failure of the control system is poor.

The marine condensate supercooling control scheme is mainly to introduce steam into the heat sink inside the condenser through the thermal deoxygenation valve to reduce the condensate subcooling. The disadvantage is that the control effect is not ideal under low load conditions, and Poor adaptability to control system failures

Moreover, the control mode of the currently commonly used marine condenser process control system is relatively single. When the control system fails, the control system can only be released from the automatic control system, and the automatic control system can only be turned on again after the fault is eliminated.

Affect the normal operation of marine steam power plant

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