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Three-baffle temperature adjusting control method of secondary reheating boiler

A technology of secondary reheating and control method, which is applied in the direction of superheating temperature control, steam superheating, lighting and heating equipment, etc. It can solve the problems of affecting the temperature adjustment effect, increasing the adjustment time, and easily confusing the adjustment logic.

Active Publication Date: 2018-12-25
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] Moreover, the adjustment process of the flue gas regulating baffle to adjust the steam temperature is a process of repeated matching, and the adjustment of the baffle has a hysteresis. After the baffle moves, it takes a buffer period before it can be reflected in the steam temperature. Each flue gas regulating baffle can be adjusted freely, there are three adjustment variables, there will be a variety of different combinations of baffle openings, multi-valued problems, the adjustment becomes complicated, the adjustment logic is easy to be confused, and the temperature adjustment effect is affected and will greatly increase the settling time

Method used

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  • Three-baffle temperature adjusting control method of secondary reheating boiler

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Embodiment Construction

[0029] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0030] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0031]The present invention studies the multi-valued problem of different opening combinations caused by the simultaneous action of multiple baffles in the prior art when the steam temperature is adjusted through the baffles, and finds that the temperature adjustment of the pure baffles under the fixed load condition of the boiler can only be controlled by one baffle When the opening is fixed and the system reaches equilibrium, the other two baffles will eventually have an opening combination to adapt...

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Abstract

The invention discloses a three-baffle temperature adjusting control method of a secondary reheating boiler. Once reheating stream temperature T1 and twice reheating stream temperature T2 are adjustedby relatively fixing the opening of one flue gas adjusting baffle in a tail flue of the secondary reheating boiler and by adjusting the opening of the other two flue gas adjusting baffles. Accordingto the three-baffle temperature adjusting control method of the secondary reheating boiler, a set of temperature adjusting logic capable of meeting the rated value requirement of the pitch peak and stream temperature of the secondary reheating boiler under the wide load aiming at the secondary reheating boiler is put forward, so that the secondary reheating boiler with tail three-flue and even four-flue pure baffle temperature adjusting realizes the capacities of high efficiency, low coal consumption and flexible adjusting, can realize that To,T2 and T2 fluctuation in a set value interval in the lifting and loading process, so that a machine set reaches a rated parameter in the wide loading range, the machine set coal consumption loss caused by stream temperature difference in the dynamiclifting and loading process is reduced, and the economical efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power plant boilers, and more specifically, relates to a temperature regulation control method for a double reheating boiler with three baffles. Background technique [0002] In order to further reduce the coal consumption of coal-fired units for power generation and further develop clean coal combustion technology, the development of high-parameter and large-capacity secondary reheat boilers is a key development direction. For the double reheat boiler, compared with the primary reheat boiler, it is necessary to control the main steam parameters and the primary reheat steam parameters, and additionally control the secondary reheat steam parameters. Therefore, compared with the single reheat boiler, it needs to be solved Secondary reheat boiler to main steam temperature T 0 , Once reheated steam temperature T 1 , Secondary reheat steam temperature T 2 regulation and control. [0003] In the existing do...

Claims

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Application Information

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IPC IPC(8): F22G5/04
Inventor 尹朝强易广宙何维朱骅韦耿支英杰
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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