Method for regulating the output of steam generators for generating power and/or providing heat
A steam generator and power regulation technology, applied in the direction of combustion method, indirect heat exchanger, heat exchanger type, etc., can solve the problems of efficiency loss, power drop, fresh steam temperature and intermediate superheater temperature drop, etc.
Active Publication Date: 2016-08-24
RWE POWER AKTIENGESELSCHAFT
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Problems solved by technology
[0013] Finally, the use of water and steam usually results in a drop in fresh steam temperature and reheater temperature, which in turn produces power drop and efficiency loss
Method used
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[0077] When referring to gross generator power and net generator power in the following, then by gross generator power is meant the electrical power available as electrical power at the terminals of the generator. The net generator power is the power actually fed into an electrical grid. The difference between the net generator power and the gross generator power is the power which is branched before the electricity grid in order to operate the steam generator itself. Generally, the steam generator is regulated by means of a gross generator output based on available data, wherein the net generator output can be derived.
[0078] The rated power of the steam generator is the electrical rated power for which the steam generator is provided. The maximum possible electrical power is the power that the steam generator can actually deliver as a function of the external or ambient temperature and the quality of the fuel and the efficiency of the heating surface.
[0079] If the hea...
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The invention relates to a method for regulating the output of steam generators for generating power and / or providing heat while taking into consideration the use of steam and / or water-powered cleaning devices while the steam generator is being operated. The method has the step of monitoring steam generator state variables which allow direct or indirect conclusions on the effectiveness and / or the dirt-accumulation state of heating surfaces of the steam generator. The method further comprises the steps of generating an effectiveness prediction using the measured and / or ascertained state variables, generating a load prediction as a function of the power demand and / or the heat demand, generating a prediction of the expected available maximum output of the steam generator as an availability prediction and as a function of the surrounding temperature and / or the fuel quality, and determining an optimal cleaning time as a function of the effectiveness prediction. A target cleaning process which is to be initiated according to the effectiveness prediction is delayed or prevented and / or shortened or prolonged and / or intensified or weakened depending on the load prediction and the availability prediction with the condition that a specified minimum effectiveness of the heating surfaces of the steam generator is not undershot and / or a specified maximally permissible dirt accumulation of the surfaces is not exceeded.
Description
technical field [0001] The invention relates to a method for power regulation of a steam generator for generating electricity and / or heating, preferably at a steam generator comprising a plurality of boilers heated with fossil or organic fuels, More precisely, taking into account the use of a steam- and / or water-operated cleaning device for the heating surface of the steam generator during operation of the steam generator. [0002] The method according to the invention for power regulation of these steam generators also includes power regulation at the steam generators with ignition devices for waste combustion, waste co-firing and waste combustion. [0003] The method according to the invention for power regulation of steam generators includes in particular power regulation at steam generators which are usually operated in the range of maximum power. Background technique [0004] This highest continuous electrical power (or this thermal power in heat generators) of a steam...
Claims
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Login to View More IPC IPC(8): F22B37/56F23J3/02F28G15/00
CPCF22B37/56F23J3/023F28D1/05366F28D2021/0094F28F2225/08F28G15/003
Inventor H·霍夫曼U·舒尔策
Owner RWE POWER AKTIENGESELSCHAFT