Method for on-line measuring dirty extent of condenser and its device

Abstract

The present invention relates to a method for on-line measuring dirty extent of the condenser and its equipment. The equipment includes several sensors, signal conditioning circuit, multiway switch, DSP, in which all the sensors are connected with signal conditioning circuit and multiway switch, at the same time connected with DSP, the LED display, keyboard and communication interface are connected with DSP. It utilizes heat transfer terminal difference as researching object, duty parameter variation and fuzzy film-forming technology to accurately implement on-line measurement of the dirty extent of condenser.

Description

Technical field: [0001] The invention relates to a heat exchange tube of a condenser, in particular to a method for measuring the dirtiness of the heat exchange tube of a condenser and a device designed by the method. Background technique: [0002] Condenser is a large-scale heat exchange equipment in electric power, petrochemical and other industries. Its function is to condense the low-temperature steam after the work of the steam turbine into water to improve the efficiency of the thermal cycle. When the condenser is running, the cooling water enters from the lower part of the front water chamber, enters the rear water chamber through the cooling water pipe (heat exchange pipe), turns upward, then flows through the upper part of the cooling water pipe to the front water chamber, and finally discharges. The low-temperature steam comes in from the steam inlet, flows down through the gap between the cooling water pipes, and condenses into water after releasing heat to the pi...

AI Technical Summary

Problems solved by technology

[0006] In the above method, measuring the thermal resistance of dirt can accurately determine the degree of contamination of the condenser, but armored thermocouples must be buried on the heat exchange tubes to detect the temperature of the tube wall, and the number of heat exchange tubes in the condenser is large, which is difficult to achieve in engineering ; Measuring the water flow resistance between the condenser outlet and inlet water chambers can reflect the amount of dirt, but it does not reflect the thermal conductivity of the dirt. It is obviously not accurate enough to determine the degree of dirt in the condenser by this method; the calculation of the heat transfer coefficient reflects the condensation The heat transfer performance of the condenser, but the traditional empirical formula is used to calculate the heat transfer coefficient at present, and the influence of non-condensable gas (air) in the steam on the heat transfer effect is not considered. When the condenser operates under variable conditions, there is a large error

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