SU1742698A1 - Device for checking wet steam conductions - Google Patents

Abstract

Use: area of measurement technology. SUMMARY OF THE INVENTION: A device for monitoring parameters of a wet steam flow comprises a section of a steam line with receivers of static pressure, dynamic head and vacuum pressure, pulse tubes, an information processing unit. The device is also equipped with temperature sensors installed in the steam line, on impulse pipes and in the environment surrounding the steam line section. One of the dynamic pressure receivers is connected via a pulse tube to a static pressure receiver, and the other dynamic pressure receiver is connected to a dynamic vacuum receiver. 1 il.

Description

The invention relates to a measuring technique and can be used to control the expenditure of energy and quality parameters of the flow of wet steam.

A device for determining the parameters of wet steam is known, which comprises a separator, a dried steam pipeline with an orifice plate, a hydraulic shutter, a measuring vessel for the liquid phase, a phase mixing unit, pulse tubes, two differential pressure gauges and a pressure gauge. In the separator of this device, the wet vapor stream is separated into dried steam and a liquid phase. The resulting dried vapor and liquid phase streams are measured by known methods and means. From the measured flow rates of the dried vapor and the liquid phase, the mass flow rate and its degree of dryness are calculated. After the measurement sites, the dried vapor and liquid phase flows into the phase mixing unit. From the phase mixing unit, steam enters the steam line.

The disadvantages of the device include the complexity of the design and the substantial destruction of the flow structure of the controlled flow.

It is also known a device for measuring parameters of a wet steam flow, comprising a steam line with dynamic pressure, suction and static pressure tubes installed therein, impulse tubes, a pressure gauge and two differential manometers connected through impulse tubes to the pressure receivers tubes.

However, in the known device, the impulse tubes are leaky, and it contains

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pressure gauge and diaphragm gauges. internal cavities which are filled with steam condensate. At negative temperatures, these cavities are destroyed.

The purpose of the invention is to increase reliability and simplify the design.

In a device comprising a section of a steam line with static pressure, dynamic head and vacuum pressure receivers, one of the impulse tubes located outside the steam line connects the dynamic head receiver to the static pressure receiver, and the second - to a second dynamic head or static pressure receiver. pressure, while the device is equipped with temperature sensors installed in the steam line, on impulse pipes, and in the medium surrounding the section of the steam pipe with impulse pipes.

The drawing shows a diagram of the proposed device.

The device comprises a section of the steam line 1, a heat insulating coating 2, receivers 3 and 4 of the dynamic head, a static pressure receiver 5, a dynamic vacuum receiver 6, pulse tubes 7 and 8. Temperature sensors 9-15,

The device works as follows.

The controlled flow of wet steam creates excessive pressure on the pressure receptacles and a decrease in pressure on the dynamic vacuum receiver. In addition, a sufficient volume of the liquid phase is also accumulated in the dynamic head receivers. Under the action of the resulting pressure drops in the impulse tubes

fluid flow is excited and maintained from the dynamic pressure receivers to the corresponding static pressure and dynamic vacuum receivers.

The initial temperature of the liquid phase in the impulse tubes is the same and corresponds to the pressure in the steam line. The temperature at the controlled points of the impulse tubes is determined by both the initial temperature and the pressure differential between the respective pressure receivers, the temperature and the environment. The temperature at the controlled points of the impulse tubes, the steam line and the ambient temperature vrypa are measured, for example, by thermocouples. The measured temperature values are used to calculate the parameters of the wet vapor flow that are not available for direct measurements.

Claims (1)

Invention Formula A device for monitoring parameters of a wet steam flow, comprising a section of a steam pipe with static pressure, dynamic head and vacuum pressure receivers, impulse tubes, an information processing unit that, in order to increase reliability and simplify the design, one of the dynamic pressure receivers is connected by means of a pulse tube with a static pressure receiver, and another dynamic pressure receiver is also connected by means of a pulse tube with a dynamic dilution receiver; The school is equipped temperature sensors installed in the steam line, on impulse pipes and in the environment surrounding the section of the steam pipe with impulse pipes.