Thermal power generating unit heater terminal difference self-adaptive adjusting method and device

Abstract

The invention discloses a thermal power generating unit heater terminal difference self-adaptive adjusting method and device. The adjusting device comprises a temperature measuring module I, a pressure measuring module, a temperature measuring module II, a temperature measuring module III, a water level measuring module, a controller and a heater drain adjusting valve, the temperature measuring module I, the pressure measuring module, the temperature measuring module II, the temperature measuring module III and the water level measuring module are electrically connected with the signal receiving end of the controller, the control end of the controller is electrically connected with the heater drain adjusting valve, and the human-computer interaction end of the controller is electrically connected with a touch screen. According to the thermal power generating unit heater terminal difference self-adaptive adjusting method and device, upper-lower terminal difference of the high-pressure heater is collected, the terminal difference is introduced into water level adjusting control of the high-pressure heater, and the automatic adjustment of the terminal difference of the heater of the unit in a wide load range is realized; weighting comparison is performed on the respective values to obtain an terminal difference index which mainly influences the economical efficiency of the high-pressure heater, then the terminal difference index is controlled, and undisturbed switching can be realized.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and relates to a method and a device capable of automatically adjusting heater end difference according to different load conditions of a unit. Background technique [0002] One of the major principles of my country's energy development strategy is to improve energy utilization efficiency. In the thermal power generation system, how to improve unit economy has always been an important content in the work of energy saving and consumption reduction in thermal power generation enterprises. [0003] Heat extraction heating is one of the measures to improve the efficiency of power plants. The heat extraction system is the main component of the thermal power system in principle. It uses the steam that has done a part of the work of the steam turbine to heat the feed water entering the boiler. Part of the steam no longer goes to the condenser to release heat to the cooling water, which...

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a thermal power unit heater end difference adaptive adjustment method and device to solve the problem that most thermal power units in the prior art use the same design end difference value after the load changes. Or fix the water level for control, resulting in the heater can not run in the best state; at the same time solve the problem of inconvenient calculation of the difference between the upper and lower ends of the heater, manual adjustment by the operator is labor-intensive, and the accuracy is poor

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