RU58220U1 - DEVICE FOR MONITORING MULTI-PHASE FLOW IN A PIPELINE - Google Patents

Abstract

The utility model relates to instrumentation and can be used to determine the type of multiphase flow in the pipeline during its operation. The device contains emitters of an ultrasonic signal and a number of receivers of an ultrasonic signal. The ultrasonic signal emitters and a number of ultrasonic signal receivers form groups of transducers that sound a multiphase flow, respectively, perpendicularly and along the central axis of the pipeline. The main group of converters is located around the circumference of the pipeline in one plane of its section, perpendicular to the central axis of the pipeline and performs sounding of a multiphase flow perpendicular to the central axis of the pipeline. An additional group of converters is located along the pipeline, in the vertical plane of its section passing through the central axis of the pipeline and performs sounding of multiphase flow along the central axis of the pipeline. The outputs of the ultrasonic signal receivers are connected to the corresponding inputs of the analog memory block and timers. The outputs of the analog memory unit and timers are connected to the inputs of the switch, respectively. One of the outputs of the switch is connected to the input of an analog - a digital converter, and the other to the input of random access memory (RAM). The system includes a microprocessor module, which is connected to an analog memory and timer unit, a switch, an analog - a digital converter, RAM and an ultrasonic signal generator. The output of the ultrasonic signal generator is connected to the emitter of the ultrasonic signal. The device comprises means for

determine the temperature of the flow inside the pipeline, means for determining the pressure inside the pipeline, means for determining the angle of inclination of the pipeline relative to a horizontal surface. The outputs of the means for determining the temperature of the flow inside the pipeline, the pressure inside the pipeline, the angle of inclination of the pipeline relative to the horizontal surface are connected to the inputs of the analog memory unit and timers. The outputs of the receivers of an additional group of converters are also connected to the inputs of the analog memory block and timers, which is connected to the microprocessor module. The input of the ultrasonic signal emitter of an additional group of transducers is connected to the output of the ultrasonic signal generator. The outputs of the analog memory unit and timers are connected to the corresponding inputs of the switch, which is connected to the microprocessor module. One of the outputs of the switch is connected to an analog - a digital converter, and the second output is connected to RAM (RAM). The microprocessor module controls the operation of all these elements and carries out data processing. 2 ill.

Description

The utility model relates to instrumentation and can be used to determine the type of multiphase flow in the pipeline during its operation.

A device for measuring multiphase flow (RU 2183012 C2, G 01 F 1/74 publ. 05.27.2002), which contains at least two measuring rings with ultrasonic sensors placed at an equal distance from each other around the stream, and at least one annular capacitive sensor designed to determine the type of flow mode. Measuring rings with sensors allow you to determine the location of interfaces to measure the relative volumes of each phase.

The disadvantage of this device is its low information content, low accuracy, because the flow is heard only in one direction (perpendicular to the central axis of the pipeline).

A device for measuring multiphase flow (RU 2270981 C2, G 01 F 15/08, G 01 F 1/74, G 01 F 1/84, publ. 02/27/2006), which contains a vortex separator associated with a pair of Coriolis flow meters, providing a measurement of mass flow rate and density, respectively, of the gas and liquid component, as well as a water meter in the liquid component. The type of meter (capacitive, resistive, microwave) is selected depending on the water content in the multiphase flow. The density of water is measured by a hydrometer in a water sample taken by a water separator. Data on the density and water content, as well as the density of the liquid component, are sent to the regulator to determine the estimated density of the liquid component.

The disadvantage of this device is its bulkiness, low mobility, lack of information, limited use.

A device for controlling multiphase flow in a pipeline (RU 2198397 C2, G 01 N 29/02, published 10.02.2003), which consists of one emitter and a number of receivers located on the walls of the pipeline by its diameter, the outputs of the receivers are connected to the inputs of the analog block memory and timers, the outputs of which are connected to the inputs of the switch, one output of which is connected to the input of an analog-to-digital converter, and the other to the input of RAM, a microprocessor module, the outputs of which are connected to the inputs of the analog memory unit and timers, mutator, an analog-digital converter, RAM and an ultrasonic signal generator. The microprocessor module controls the operation of the listed blocks of the system and carries out data processing.

The disadvantage of this device is its low accuracy, because many factors affecting the determination of the flow regime in the pipeline are not taken into account, parameters, the flow is sounded only in one direction (perpendicular to the central axis of the pipeline).

The task to which the claimed technical solution is directed is to develop a device that allows continuous monitoring of the pipeline.

In the implementation of the utility model, the problem is solved by achieving a technical result, which consists in increasing the accuracy and information content, when determining the flow regime in the pipeline, due to the fact that additional factors affecting the nature of the multiphase flow (flow temperature, pressure in the pipeline) are taken into account , the angle of inclination of the pipeline relative to the horizontal surface). These additional factors

significantly affect the mode of multiphase flow in the pipeline. For example, temperature affects the viscosity of a fluid in a pipeline, pressure in a pipeline affects the quality of the flow, and the angle of inclination of the pipeline relative to a horizontal surface affects not only the flow regime in the pipeline, but also the ability to change the current flow regime. Without taking these parameters into account, a correct determination of the multiphase flow regime in a pipeline would be possible only within certain boundaries of the flow temperature, pressure in the pipeline, and a certain angle of inclination of the pipeline. Given these parameters, in addition to increasing the accuracy in determining the flow pattern in the pipeline, we significantly expand the scope of application of this multiphase flow control device in the pipeline.

The specified technical result is achieved by the fact that the device for controlling the multiphase flow in the pipeline contains an ultrasonic signal emitter and a number of ultrasonic signal receivers forming the main group of transducers located around the circumference of the pipeline in one plane of its section, perpendicular to the central axis of the pipeline, which performs sounding of the multiphase flow perpendicular to the central axis pipeline, block of analog memory and timers, switch, analog-to-digital converter , RAM, a microprocessor module, an ultrasonic signal generator, also contains means for determining the temperature of the flow inside the pipeline, means for determining the pressure inside the pipeline, means for determining the angle of inclination of the pipeline relative to the horizontal surface, an ultrasonic signal emitter, a number of ultrasonic signal receivers forming an additional group converters, while an additional group of converters is located along

pipeline, in the vertical plane of its section, passing through the central axis of the pipeline, performing the sounding of multiphase flow along the central axis of the pipeline. The outputs of the means for measuring the temperature of the flow inside the pipeline, the pressure inside the pipeline, the angle of inclination of the pipeline relative to the horizontal surface, as well as the ultrasonic signal receivers of both groups are connected to the inputs of the analog memory blocks and timers, the outputs of the analog memory blocks and timers are connected to the inputs of the switches, one of the outputs of the switches connected to the input of an analog-to-digital converter, and the second output of the switches is connected to the input of RAM, the outputs of the generator are ultrasonic of the signal connected to the inputs of the ultrasonic signal source, a microprocessor unit connected with the ultrasonic signal generator, the analog memory blocks and timers, switches, analog - digital converter, RAM.

Both groups of converters simultaneously receive and record the amplitudes and travel times of transmitted and reflected signals, convert them into a digital form convenient for processing, and compare with a set of digital standards (in the previously defined reference group) corresponding to different multiphase streams in the microprocessor module flash memory, and the results of the comparison determine the nature of the multiphase flow. Improving accuracy is achieved due to the fact that both groups of transducers participate in the sounding of a multiphase flow.

A group of transducers is an ultrasonic signal source, as well as several signal receivers of this type. The main group of converters sounds flow perpendicular to the central axis of the pipeline, and an additional group of converters sounds flow along the central axis of the pipeline. Moreover, with

longitudinal sounding the path traveled by an ultrasonic wave from the emitter to each receiver is always different. Passing a longer path, the ultrasonic wave spends a longer time, i.e. the time of influence of the multiphase flow on the ultrasonic wave increases with increasing path, so the receiver will receive the sound wave maximally altered by the multiphase flow, and changes in the ultrasonic wave directly depend on the composition and flow regime of the multiphase flow. Based on this, we will have a more accurate picture of the multiphase flow regime in the pipeline.

Figure 1 shows a device for monitoring multiphase flow in a pipeline. Figure 2 presents a block diagram of a device for controlling multiphase flow in a pipeline.

The device (in FIG. 1) contains means for measuring the temperature 1 of the flow, means for determining the pressure 2 inside the pipeline and means for determining the angle of inclination 3 of the pipeline relative to the horizontal surface, an additional group of 4 converters, the main group of 5 converters. The numbers indicate: 6 - the direction of sounding of the multiphase flow by an additional group of 4 converters, 7 - the direction of sounding of the multiphase flow by the main group of 5 converters, 8 - the direction of movement of the multiphase flow inside the pipeline 10, 9 - the central axis of the pipeline 10.

The device (figure 2) contains two emitters 11, 12 and two rows of receivers of the ultrasonic signal 13, 14. The emitter of the ultrasonic signal 11 and a number of receivers of the ultrasonic signal 13 form the main group 5 of the transducers, located around the circumference of the pipeline in one plane of its cross section, perpendicular the central axis of the pipeline, which sounds multiphase flow perpendicular to the central axis 9 of the pipeline 10. Emitter

of the ultrasonic signal 12 and a number of receivers of the ultrasonic signal 14 form an additional group of 4 transducers located along the pipeline, in the vertical plane of its section passing through the central axis of the pipeline, which sounds multiphase flow along the central axis 9 of the pipeline 10.

The location (inside or outside the pipeline) of the emitters of the ultrasonic signal 11, 12, the receivers of the ultrasonic signal 13, 14, as well as other means of measurement and control, indicated in figure 1 and figure 2, is determined based on the selected, when implementing the device, technical means and their design features. When choosing the technical means of implementing the device, it is necessary to take into account the limits of applicability, as well as the area of use of one or another technical means.

The outputs of the receivers of the ultrasonic signal 13 are connected to the corresponding inputs of the block 15 of the analog memory and timers, and the outputs of the receivers of the ultrasonic signal 14 to the corresponding inputs of the block 16 of the analog memory and timers. The outputs of block 15 of the analog memory and timers, as well as block 16 of the analog memory and timers are connected to the inputs of the switches 17 and 18, respectively. One of the outputs of the switches 17 and 18 is connected to the input of an analog-to-digital converter 19, and the other to the input of random access memory (RAM) 20. The device includes a microprocessor module 21, the outputs of which are connected to the inputs of blocks 15 and 16 of the analog memory and timers, switches 17 and 18, analog-to-digital Converter 19, RAM 20 and the ultrasonic signal generator 22.

The microprocessor module 21 controls the operation of the listed circuit elements of figure 2 and performs data processing.

An example of a means for determining pressure inside a pipeline is a Metran-100 pressure transmitter, an example of a means

for determining the temperature of the multiphase flow inside the pipeline is the temperature sensor TSMU Metran - 274, an example of a means for determining the angle of inclination of the pipeline relative to the horizontal surface is the angle sensor (inclinometer) ILM - 01.

A device for controlling multiphase flow in the pipeline 10 operates as follows. Data from the outputs of the means determining the temperature 1 of the flow, pressure 2 inside the pipeline 10 and the angle of inclination 3 of the pipeline 10 relative to the horizontal surface are supplied to the inputs of the analog memory block 16, where, under the control of the microprocessor module 21, the values of these parameters are recorded for the current survey cycle of the receivers 13, 14 Moreover, in the next survey cycle of the receivers 13, 14, the information is also initially taken from means for measuring the temperature 1 of the flow, pressure 2 inside the pipeline 10 and determining conduit 3 la inclination 10 relative to a horizontal surface. Further, using the switch 18, the obtained analogue signals are transmitted for the values of flow temperature, pressure inside the pipeline 10 and the angle of inclination of the pipeline relative to the horizontal surface to an analog - digital converter 19 in order to convert them into a proportional digital code. After that, the obtained digital codes go to random access memory (RAM) 20, where, under the control of the microprocessor module 21, a group of reference values of various multiphase flow modes is determined for a given flow temperature, pressure inside the pipeline 10 and the angle of inclination of the pipeline 10 relative to the horizontal surface.

Then, the ultrasonic signal generator 22 under the control of the microprocessor module 21 generates electrical pulses with a frequency of (1-2.5) MHz. These pulses arrive at the emitters 11 and 12, which form ultrasonic vibrations propagating

through a controlled environment - multiphase flow. With the help of receivers 13 and 14, ultrasonic vibrations transmitted through a multiphase stream are received, which are fed to the inputs of analog memory blocks 15 and 16 and timers, respectively, where the maximum amplitudes and time of signal reception are recorded by synchronization control signals from microprocessor module 21. Switches 17 and 18 allow you to sequentially interrogate blocks 15 and 16 of the analog memory and timers with the aim of converting, using the analog-to-digital converter 19, the analog signals into proportional background code, as well as sequentially transmit digital timer codes proportional to the time delays of the received signals, in RAM (RAM) 20.

The identification of the flow regime and its features is carried out by the microprocessor module 21 according to the program stored in the flash memory of the module.

The device can be the basis for long-term pipeline monitoring. Using this device to control multiphase flow in a pipeline, it is possible to build a system that calculates the predicted rate of internal corrosion of the pipeline. Based on this device, it is possible to conduct comprehensive diagnostics of already functioning pipelines, as well as to carry out work to optimize the functioning of pipelines. This device can be used as part of a parametric method for determining pipeline leaks.

Claims (1)

A device for controlling a multiphase flow in a pipeline containing an ultrasonic signal emitter and a number of ultrasonic signal receivers forming the main group of transducers located around the circumference of the pipeline in one plane of its cross section, perpendicular to the central axis of the pipeline, performing the sounding of the multiphase flow perpendicular to the central axis of the pipeline, an analog memory unit and timers, switch, analog-to-digital converter, random access memory, microprocessor module, an ultrasonic signal generator, characterized in that the device further comprises means for determining the temperature of the flow inside the pipeline, means for determining the pressure inside the pipeline, means for determining the angle of inclination of the pipeline relative to the horizontal surface, an ultrasonic signal emitter and a number of ultrasonic signal receivers forming an additional group of transducers, wherein an additional group of converters is located along the pipeline, in a vertical plane bones of its cross section passing through the central axis of the pipeline, performing multiphase flow sounding along the central axis of the pipeline, outputs of measuring instruments for the flow temperature inside the pipeline, pressure inside the pipeline, the angle of inclination of the pipeline relative to the horizontal surface, as well as the outputs of the ultrasonic signal receivers of both groups are connected to the inputs of the blocks analog memory and timers, outputs of analog memory blocks and timers are connected to the inputs of the switches, one of the outputs of the commutator tori is connected to the input of the analog-to-digital converter, and the second output of the switches is connected to the RAM input, the outputs of the ultrasonic signal generator are connected to the inputs of the ultrasonic signal sources, the microprocessor module is connected to the ultrasonic signal generator, analog memory and timer blocks, switches, the analog-to-digital converter RAM.