Control system and method for heat throwing load of steam extraction heat supply unit

Abstract

The invention discloses a control system and method for the heat throwing load of a steam extraction heat supply unit, and the system comprises an acquisition module which is used for collecting the actual input flow value of the amount of pulverized coal entering a hot press, setting the actual flow value as a first flow value, and setting the rated pulverized coal input flow value of the hot press as a second flow value, the first flow value and the second flow value are converted into a first thermal load value and a second thermal load value; the heat supply capacity of the hot press can be adjusted when the heat throwing phenomenon occurs due to instant energy unbalance suddenly caused by factors such as hot press tripping and the like when the hot press breaks down, the loads of the hot press and a steam turbine are not matched, the steam pressure suddenly rises, the reheating steam temperature suddenly drops and the like, the influence of the heat throwing phenomenon on the hot press is reduced, and the heat supply efficiency of the hot press is improved. Stable heat supply of the hot press is guaranteed, and the situation that the safety of a unit is affected by the heat throwing phenomenon or even non-stop accidents are caused is avoided.

Description

technical field [0001] The invention relates to the technical field of steam extraction and heating units, in particular to a control system and method for heat load rejection of steam extraction and heating units. Background technique [0002] With the reform of my country's energy structure, the proportion of new energy power generation continues to increase, and the output of thermal power units has dropped sharply. Long-term low-load operation has increased the cost of coal consumption and electricity consumption. production, to improve unit operation efficiency and economy. It is a transformation method of thermoelectric coupling to use a hot press to extract steam from the steam extraction system of thermal power units or the main and reheat steam systems to supply heat. [0003] After the transformation of the thermoelectric coupling, if the heating equipment fails, such as the tripping of the hot press, etc., the instantaneous energy imbalance will be caused suddenly...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is: when the heating equipment breaks down, such as the tripping of the hot press, etc., the instantaneous energy imbalance is caused suddenly, resulting in a mismatch between the hot press and the steam turbine load, a sudden increase in the steam pressure, and a decrease in the temperature of the reheated steam. Sudden drop, etc.

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