A method and system for on-line monitoring of the wall temperature of the vertical water-cooled wall of an ultra-supercritical boiler

An ultra-supercritical boiler and water-cooled wall technology, which is applied in the control system, indication of boiler working conditions, steam generation, etc., can solve problems such as inconsistencies in heat load uneven coefficients, avoid long-term over-temperature operation, prolong service life, The effect of improving the reliability of safe operation

Active Publication Date: 2017-11-14
SHANGHAI POWER EQUIP RES INST
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Problems solved by technology

However, in the actual process, the throttling flow adjustment under the theoretical working conditions may not meet the needs of the actual working conditions, mainly because the thermal load non-uniformity coefficient of the theoretical working conditions is inconsistent with the heat load non-uniformity coefficient of the actual working conditions

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  • A method and system for on-line monitoring of the wall temperature of the vertical water-cooled wall of an ultra-supercritical boiler
  • A method and system for on-line monitoring of the wall temperature of the vertical water-cooled wall of an ultra-supercritical boiler
  • A method and system for on-line monitoring of the wall temperature of the vertical water-cooled wall of an ultra-supercritical boiler

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Embodiment Construction

[0041] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0042] The invention provides an online detection method for the wall temperature of the vertical water-cooled wall of an ultra-supercritical boiler. The method is composed of the following three processes:

[0043] The first process: basic information calculation.

[0044] Step 1: Read boiler wall temperature measurement points and unit operating parameter information: the database server reads the temperature of the lower vertical water-cooled wall outlet tube wall measurement point through the factory-level monitoring device every Δt=0.5 minutes, and the upper vertical water-cooled wall outlet tube wall temperature. Wall measuring point temperature, load, main steam pressure, main steam flow, economizer outlet pressure, economizer outlet feed water temperature, coal mill combination and other parameter information.

[0045] In t...

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Abstract

The invention provides an online monitoring method for the wall temperature of a vertical water wall of an ultra-supercritical boiler. The wall temperature of the vertical water wall is calculated through a sectional calculating and data fitting method according to structural parameters of the vertical water wall and operation parameter information of a unit. The invention further provides an online monitoring system for the wall temperature of the vertical water wall of the ultra-supercritical boiler. The online monitoring system is composed of a calculating server, a database server, a web site server, a client side browser and a plant level monitoring device. The web site server is connected with the client side browser; the database server is connected with the calculating server; and the database server has access to the plant level monitoring device, and therefore the system can be connected with a boiler DCS. By means of the online monitoring method and the online monitoring system, the phenomenon that parts of pipe sections of the vertical water wall run at an excess temperature for a long time can be effectively avoided, the service life of the vertical water wall is prolonged, and the reliability of safety operation of the boiler is improved.

Description

technical field [0001] The invention relates to an online detection method and system for the wall temperature of a vertical water wall of an ultra-supercritical boiler, belonging to the technical field of boilers. Background technique [0002] The vertical water-cooled wall of the ultra-supercritical boiler includes a lower vertical water-cooled wall and an upper vertical water-cooled wall, with a mixing header in the middle. Due to the inconsistency between the combustion conditions and the design conditions of the vertical water wall, as well as the inconsistency between the combustion coal type and the design coal type, in the actual combustion process, long-term over-temperature phenomenon of some pipe sections often occurs, and the long-term over-temperature phenomenon caused by the pipe material Rapid decay of life and tube burst phenomenon. [0003] During the combustion process of the vertical water-cooled wall, in order to prevent the phenomenon of over-temperatur...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/18F22B37/38
CPCF22B35/18F22B37/38
Inventor 陶丽杨凯镟丁士发陈朝松崇培安王璞
Owner SHANGHAI POWER EQUIP RES INST
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