Temperature flow-type steam quality measurement device and measurement method

Abstract

The invention discloses a temperature flow-type steam quality measurement device and a measurement method thereof, comprising a temperature sensor, a flowmeter, a heat transfer rod, a thermal sleeve and a steam quality processor. The heat transfer rod (4) is installed on the wall of a steam pipe (10); a steam temperature sensor (1) and a target-type flowmeter (5) are respectively arranged at the two sides of the heat transfer rod; and the outer surface of the heat transfer rod (4) is sleeved with a thermal sleeve (7). A hot end temperature sensor (8) is internally embedded at the hot end of the heat transfer rod (4), and the hot end directly contacts with the steam in the steam pipe; a cold end temperature sensor (3) is internally embedded at the cold end of the heat transfer rod (4), and the cold side is fixed with a cooling fin (2) and contacts with the ambient air. The invention derives the steam flow in the steam pipe according to the steam temperature in the steam pipe, the hot end temperature of the heat transfer rod, and the cold end temperature of the heat transfer rod, and then combines the steam flow in the steam pipe with the steam flow which is measured by the target-type flowmeter, and finally calculates the wet steam quality in the steam pipe. The invention has the advantages of high measurement accuracy, and good stability and reliability.

Description

1. Technical field [0001] The invention relates to the technical field of steam physical property measurement, and relates to a warm-flow type steam dryness measurement device and a measurement method. 2. Background technology [0002] Steam dryness is an important quality parameter of steam. The mixture containing gas-phase steam and liquid-phase liquid is called wet steam, also known as saturated steam. The ratio of the mass of gas-phase steam to the total mass of wet steam is defined as steam dryness. In the thermal oil recovery technology used in the oil extraction process, the dryness of the water vapor injected into the oil well has an important impact on the economics of oil recovery. In chemical, food processing, pharmaceutical and other industries, water vapor dryness is also an important physical property that cannot be ignored, and continuous detection and control of water vapor dryness is required. [0003] The invention patent with the application number of 810...

AI Technical Summary

Problems solved by technology

However, in this steam dryness measurement method, the flow measurement principle of the involved orifice flowmeter and Venturi tube flowmeter is to calculate the steam flow of the steam pipeline by collecting the fluid pressure difference before and after the flowmeter. That is to say, the flow measurement principles of these two flowmeters are the same, and they belong to the same differential pressure flowmeter in theory, so their flow formulas are similar.

In the simultaneous solution of the flow formulas of the two flowmeters of the same type, the steam dryness can be automatically eliminated, so that the steam dryness as the variable to be obtained cannot be obtained

Although the invention patent introduces the "two-phase slip ratio" parameter into the flow formulas of the two flowmeters, and deforms the flow formulas of the two flowmeters, the two flow formulas are different in form, but in essence The similarity of the flow formulas of these two flowmeters has not been changed. Therefore, from the measurement principle, it is impossible to have high measurement accuracy and the measurement stability of this steam dryness method.

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