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Direct air-cooled condenser temperature online monitoring system and method

An air-cooled condenser and monitoring system technology, which is applied to steam/steam condensers, thermometers and thermometers using electrical/magnetic components directly sensitive to heat, etc., can solve the problem of high cable wiring space requirements and installation and maintenance costs. High, lack of flexibility, etc.

Active Publication Date: 2021-07-16
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At this stage, the following solutions are usually adopted for temperature measurement of heat exchange tube bundles of direct air-cooled condensers: 1) Send staff to conduct manual inspections, but the working environment of manual inspections is harsh and labor-intensive. The most important thing is manual inspections Real-time monitoring cannot be achieved, and staff cannot make real-time adjustments in time according to on-site conditions; 2) CN205537182U provides an online monitoring system for the temperature field of an indirect air-cooled condenser, including multiple monitoring cables, multiple collectors, and communication cables and the main control machine, wherein one or more monitoring cables in the plurality of monitoring cables are respectively electrically connected to one of the plurality of collectors, and the collectors are respectively connected to the main control electromechanically through communication cables
Multiple monitoring cables are installed in the outer area of ​​the heat exchange tube bundle, and digital temperature sensors are used to realize online monitoring of the temperature field. However, the system includes multiple monitoring cables, multiple collectors and communication cables, and the installation and maintenance costs are relatively high. Not only Calibration takes time and effort, and once the temperature sensor fails, it is troublesome to replace it; in addition, the cable wiring has high space requirements, and if it is not removed in summer, it will also affect the heat transfer effect; the temperature collection point is fixed, and there will be detection dead ends, which do not have flexibility

Method used

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  • Direct air-cooled condenser temperature online monitoring system and method
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  • Direct air-cooled condenser temperature online monitoring system and method

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Embodiment approach

[0036] "Temperature sensor" refers to a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. The non-contact temperature sensor does not need to be in contact with the measured medium, but passes the heat radiation or convection of the measured medium to the temperature sensor to achieve the purpose of temperature measurement. This type of sensor mainly includes infrared thermometers. The environmental conditions in which the infrared thermometer is located, such as temperature, dust, smoke and steam conditions, have an impact on the selected specifications and measurement accuracy.

[0037] "Temperature sensor moving system" refers to a system that is installed above the surface of the heat exchange tube bank of the direct air-cooled...

Embodiment 1

[0049] figure 2 It is the route that the temperature sensor mobile system moves and the area scanned by the temperature sensor that is preset by the four-row tube (MASH) system. During the start-up process of the equipment and when the load is low, in order to shorten the scanning period, the area can be limited to the plane area where the bottom of the heat exchange tube bundle traverses the entire tube bundle plane and moves up and down at a height of 1 meter, because the air flow passing through this area is large and brings The more heat it takes, the more likely it is to freeze. The scanning area and path are shown in 12, where the distance between the substrate tubes is A.

[0050] In the programmable controller system, buttons and travel switches are used as input signal elements of the programmable controller, and contactors are used as output actuators to control the horizontal drive mechanism for horizontal movement and the lifting drive mechanism for vertical move...

Embodiment 2

[0053] image 3 It is the route that the temperature sensor moving system moves and the area that the temperature sensor scans in advance for the single-pipe, double-pipe or triple-pipe system. Because for the single-row tube, double-row tube and three-row tube systems, the counterflow tubes are arranged separately in part of the heat exchange tube bundle area, and only the area where the counterflow tube bundle is separately arranged can be scanned. During the start-up of the equipment and when the load is low, in order to shorten the scanning period, it can be limited to a plane area with a height of 1 meter moving up and down along the bottom of the countercurrent tube bundle. The scanning area and path are shown in 13, where the distance between the substrate tubes is B.

[0054] When the automatic control operation starts, adjust the position of the mobile cleaning platform so that the temperature sensor is directly above the center line of the rightmost substrate tube, ...

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Abstract

A direct air-cooled condenser temperature online monitoring system and method, the system comprising: setting a temperature sensor mobile system above the heat exchange tube bundle surface (2) of the direct air-cooled condenser, and installing a temperature sensor on the temperature sensor mobile system ( 1), the temperature sensor moving system moves the temperature sensor (1) on a plane parallel to the heat exchange tube bundle surface (2) of the direct air-cooled condenser; uploads the data collected by the temperature sensor (1) to the connected data The processing system (5) and the data processing system (5) can realize the functions of collecting, analyzing, storing, inquiring and alarming according to the preset settings. Compared with the arrangement of multiple monitoring cables in the prior art, the system and method can realize multi-measuring point scanning, simplify wiring, avoid detection dead angle, and have flexibility.

Description

technical field [0001] The present invention relates to an on-line temperature monitoring system and method of a direct air-cooled condenser, more particularly, to a mobile direct air-cooled condenser temperature on-line monitoring system and method. Background technique [0002] The function of the direct air-cooled condenser is to condense the low-pressure steam discharged from the steam turbine into condensed water. The direct air-cooled condenser is mainly composed of an axial fan system, an A-frame support system, a condensate system, a drainage system, a tube bundle system, a vacuum system and a cleaning system. The tube bundle is made of heat exchange tubes composed of steel base tubes and external fins, arranged according to certain rules and welded to the tube sheet at both ends. The cross-section of the base pipe is circular, oval or oblate. Fins are aluminum or galvanized steel and are attached to the base tube by winding, nesting, brazing or extrusion. Steam a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/00
CPCF28B11/00F28D1/04F28F19/006F28F27/00F28F2265/14F28G15/003F28B1/06G01K13/00
Inventor 郭汉森段媛媛
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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