Exhausting humidity on-line monitor for steam turbine

A technology of exhaust steam humidity and steam turbine, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of increasing flow resistance, high requirements for vacuuming equipment, and interference with the humidity of the steam to be measured. The effect of low consumption, low humidity interference and easy maintenance

Inactive Publication Date: 2008-07-16
TOHOKU DENRYOKU GAKUIN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the humidity probe measures, the sampled steam is drawn out of the steam turbine, which interferes with the humidity of the steam to be measured, and the influence of steam heat dissipation on the humidity measurement is not considered
However, the use of orifice plates to measure flow increases the flow resistance and requires high vacuum equipment.
Due to sampling measurement, long-term continuous online monitoring cannot be realized

Method used

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  • Exhausting humidity on-line monitor for steam turbine
  • Exhausting humidity on-line monitor for steam turbine
  • Exhausting humidity on-line monitor for steam turbine

Examples

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Embodiment 1

[0081] From attached figure 1 It can be seen that the steam turbine exhaust humidity online monitoring device of the present invention is located in the exhaust pipe of the low-pressure cylinder of the steam turbine, and the probe 1 and its positioning bracket 11 are welded below the sub-plane in the cylinder, so that the probe 1 is parallel to the steam turbine exhaust steam flow direction, and the probe head The part 6 is facing the direction of the incoming flow, and the probe 1 is 10-20 cm away from the last stage blade of the steam turbine. The wet steam flows freely through the probe 1, where it is heated into superheated steam. The device is mainly composed of a probe 1, a cable 4 and a cable sealing device, a data acquisition control device 5, a power supply, wires and lead wires, and the like. From attached figure 2 It can be seen that the probe 1 is provided with a heating tube 23 in the evaporating section and a heating tube 24 in the superheating section. They a...

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Abstract

An on-line detection device setting in exhaust tube for turbine low pressure cylinder is composed of probe, cable and its sealing device, data collection and control device, power and lead. It features that all leads of transducers and wires in probe are connected to cable then led out from low pressure cylinder through cable sealing device to data collection and control device which is composed of hardware of monolithic computer relay, watchdog, etc and software of data analysis, data collection, humidity calculation, etc. The probe heating wire is insulated with aluminium silicate for long term of on-line detection.

Description

technical field [0001] The invention relates to an online measuring device for the humidity of flowing wet steam, in particular to a device for long-term continuous online monitoring of the exhaust steam humidity of a condensing steam turbine. Background technique [0002] There are mainly optical methods and heating methods for measuring the humidity of steam turbine exhaust. So far, there is no device capable of long-term continuous online monitoring of the humidity of steam turbine exhaust to meet the actual needs of production, and most of them are in the stage of experimental research. The optical window of the optical method steam turbine exhaust steam humidity measurement device is easy to condense and affect the practical application. Chinese patent application number 85103642 has announced " electric heating meter method humidity probe ", and it is made up of the shaft coupling that an electric heater, diversion positioning vacuum sleeve, flow hole device and adjust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/60G01N35/00H05B3/44G06F19/00
Inventor 杨善让王升龙赵贺王建国齐兵陈福徐志明孙灵芳张海林王恭陈立军娄娟
Owner TOHOKU DENRYOKU GAKUIN
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