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Ultra-supercritical boiler heating-surface wall-temperature monitoring system and monitoring method

An ultra-supercritical boiler and monitoring system technology, applied in the field of boiler manufacturing, can solve the problems of thermocouple length and price, and achieve the effect of increasing reliability, reducing length, increasing reliability and life

Inactive Publication Date: 2011-02-16
国能浙江北仑第三发电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem in the prior art that the thermocouples are led out from both sides of the boiler, resulting in very long thermocouples and high prices, the invention provides a feasible and low-cost thermocouple lead-out structure, which can The heated tubes of the final stage superheater and the panel superheater are fully monitored in real time, and the heating state in the boiler is monitored in real time. When a tube is blocked or the boiler is heated to partial heating, the ultra-supercritical boiler heating surface wall temperature can be alarmed in time. Monitoring system and monitoring method

Method used

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Embodiment

[0025] An ultra-supercritical boiler heating surface wall temperature monitoring system of this embodiment, see figure 1 , Monitor the heating surface wall temperature of No. 1 boiler 1 and No. 2 boiler 2 at the same time, the thermocouple 3 on each pipeline of the middle panel superheater and final superheater of No. 1 boiler 1, No. 2 boiler 2 and two data respectively The acquisition system 4 is connected, and the two data acquisition systems 4 are respectively connected to two industrial computers 5 that are mutually redundant.

[0026] See figure 2 , The thermocouple 3 on a certain tube panel is distributed along the width of the furnace, and the thermocouple 3 is installed on the top of the furnace. After passing through the sleeve 6, the thermocouple 3 is arranged in sequence with the data acquisition system 4 in the order of the thermocouple 3 along the width of the furnace. Connected; in this embodiment, the length of the thermocouple 3 installed in the panel superheater ...

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Abstract

The invention relates to ultra-supercritical boiler heating-surface wall-temperature monitoring system and monitoring method, aiming to solve the problems of long thermocouples and ultrahigh price caused when the thermocouples are led out from both sides of a boiler. The ultra-supercritical boiler heating-surface wall-temperature monitoring system comprises the thermocouples, data acquisition systems and a monitoring system, wherein the input ends of the data acquisition systems are connected with the thermocouples, and the output ends of the data acquisition systems are connected with the monitoring system. The ultra-supercritical boiler heating-surface wall-temperature monitoring system is characterized in that the thermocouples are led out from the top of the boiler, the data acquisition systems are placed at the top of the boiler, each data acquisition system comprises a heat-collecting block, and the thermocouples and the heat-collecting blocks are directly welded and connected. The thermocouples are led out from the top of the boiler, the length of the thermocouples is reduced, and the cost of the thermocouples is greatly lowered, so that each pipeline of a boiler platen superheater and a finishing superheater can be comprehensively monitored, and the monitoring reliability is greatly enhanced.

Description

Technical field [0001] The present invention relates to the field of boiler manufacturing. More specifically, the present invention relates to a heating surface wall temperature monitoring system and monitoring method of an ultra-supercritical boiler. Background technique [0002] Energy saving, emission reduction, and cost reduction require thermal power units to improve efficiency, and promote the unconventional and rapid development of supercritical and ultra-supercritical units. However, from the perspective of related units that are currently in operation, the final stage superheater, panel superheater and terminal Grade reheater austenitic stainless steel material, small pipe diameter, small pipe orifice, higher cleanliness control requirements for boiler manufacturing and installation, higher probability of orifice blockage during boiler flushing; normal austenitic stainless steel material During operation, it is easy to oxidize, peel off easily, and form deposits at the e...

Claims

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Application Information

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IPC IPC(8): F22B35/00
Inventor 陈旭伟贺益中周江沈维君贺贤峰沈士军许伟峰
Owner 国能浙江北仑第三发电有限公司
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