JPS5916507A - Phase separating system - Google Patents

Abstract

PURPOSE:To obtain an effective gaseous-phase-exhausting function, by providing a liquid phase detector and a valve mechanism to a gaseous-phase exhausting line, and closing the exhausting line at the time when a liquid phase is mixed into the exhausting gas phase. CONSTITUTION:A viscous mixed-phase flow flows into a phase-separating device 1 from its flow-in port 2, and flows out from a flow-out port 3 after removing a gaseous phase by filtering the mixed phase with a strainer 6. The captured gaseous phase is flocculated by sliding the port 3 and the filtering surface of the strainer 6 relatively with each other, and is removed from a discharging port 5. Coarse solid particles are removed by a scraper 7, and are discharged from a coarse-particle discharging port 4. A liquid phase detector 8 is provided to the gaseous phase discharging port 5, and a gaseous-phase-exhausting line 9 is closed by driving a valve mechanism 10 when the liquid phase is mixed into the line 9. Further, the mechanism 10 is opened simultaneously when the liquid phase is lowered below a prescribed level.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for effectively discharging a gas phase from a phase separation device installed in a transfer line for a viscous mixed flow. The present invention relates to a phase separation system that detects a liquid phase and operates a valve mechanism to close a gas phase discharge line when the liquid phase is mixed into the discharged gas phase.

"Coal and heavy oil mixed fuel" (hereinafter referred to as COM) is a two-phase flow that is a mixture of coal powder and heavy oil, or is actually a three-phase flow that contains air bubbles. Furthermore, when burning Una COM,
Coal powder is restricted to a predetermined size or less in order to pass through the burner nozzle. In addition, the flow rate must be measured during 00M shipping and receiving, and the inclusion of gas phase will reduce the accuracy of flow rate measurement, so the gas phase must be removed before it flows into the flowmeter. . A phase separation device is generally provided for this purpose. An example of such a phase separator is a method of detecting the liquid inside the phase separator and discharging the gas phase, such as in Japanese Patent Application No. 57-4539R "Strainer with Gas-Liquid Separation Function". However, in the past, a liquid phase detector was not provided in the phase separator, so the phase separator 1 shown in Figure 1 alone did not fulfill the exhaust function, and it was necessary to separately install a functional device on top. There is. An object of the present invention is to realize a more effective gas phase discharge function by separately disposing a phase separation device and a gas phase discharge mechanism.

This will be explained below with reference to FIG.

The viscous multiphase flow flows in from the inlet of the phase separation device 1, and the phase separation device serves as an air separator and strainer to separate and remove gas phase components and solid components exceeding a predetermined amount contained in this viscous mixed flow. It has a built-in strainer 6 having a filtration surface that allows even solid particles of a predetermined size or less contained in the viscous mixed flow to pass through. The second filtration surface also has the ability to trap or trap air bubbles and float them to the surface. In this phase separation device, by sliding relative to the filter surface of the strainer 6 and the outlet 3 through which the viscous mixed flow flows out after filtration and gas phase removal, the viscous mixed flow after filtration and removal of the gas phase is slid relative to the filter surface of the strainer 6. A discharge port 5 which agglomerates the collected gas phase to assist flotation and eliminates the thus floated gas phase, a scraper 7 which removes the captured coarse solid particles, and a coarse particle discharge port 4 which eliminates the coarse solid particles. have. A liquid phase detector 8 is disposed at the gas phase outlet 5 . The liquid phase detector is installed at the gas phase discharge port 5 of the phase separation device and the gas phase discharge line 9 of the air vent, and detects the presence of a liquid phase in the discharged gas phase.
A physical quantity that changes when a liquid phase is mixed into a gas phase, such as a liquid phase level caused by ultrasonic waves, a change in the acoustic impedance of ultrasonic waves, or a change in the speed of sound, may be used. This signal is sent to the control unit 11 to actuate the valve mechanism 10 due to the presence of the liquid phase and close the gas phase discharge line 9. However, due to the time delay in the valve closing operation, the liquid phase may be discharged into the atmosphere if left as is. Therefore, a vent tank 12 is installed in the gas phase discharge line 9 to capture the liquid phase, and when the liquid level reaches a certain level, the liquid phase is discharged into the atmosphere. The viscous multiphase flow is returned from the bottom of the tank 12 via the drain discharge pulp 13 to the viscous multiphase flow source.

When the liquid phase is detected and the valve is closed, it remains closed while the liquid phase is detected in the liquid phase detector, but it opens immediately when the liquid phase falls below a predetermined level. Therefore, if the transfer line is at high pressure, the multiphase flow will flow out at high speed. Therefore, a certain delay time is set in the control unit according to the amount of gas phase contained in the transfer line, and this delay time is We are planning to open the valve later. As a result, a certain amount of gaseous phase is accumulated in the phase separation device, so that control can be performed according to changes in the situation.

As shown above, according to the present invention, by adding a mechanism with a phase separation function to the phase separation device without newly installing a liquid level detector, a high-speed mixing flow can be achieved when the transfer line is under high pressure. Therefore, a certain delay time is set in the control unit according to the amount of gas phase contained in the transfer line.
The valve is opened after this delay time. As a result, the above-mentioned problem is solved because a certain amount of gas phase is accumulated in the phase separation device.

In addition, if the liquid phase component in the phase detector increases rapidly, the valve device must also operate rapidly, so by closing the valve when the rate of change in the liquid phase component exceeds a predetermined value, it is possible to prevent changes in the situation. Control can be performed accordingly.

As shown above, according to the present invention, phase separation can be easily performed by adding a mechanism with a phase separation function without installing a new liquid level detector in the phase separation Ni1 device 171'', and further, As in the case of separation based on liquid level detection, the valve contact + FA operation within the phase separator is repeatedly activated, resulting in a small valve mechanism, which poses a problem in durability, but it is reliable because it can be installed as a large valve mechanism. It has the advantage of being able to maintain a high level of liquid.It also has the advantage of increasing the separation performance because the liquid level between the multiphase fluid level in the phase separator and the discharge port can be maintained high.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram regarding the phase separation system of the present invention. 1 - Phase separation device 8 Liquid phase detector 10 Valve device 12 Vent tank 11 Control unit

Claims (4)

[Claims] (1) A liquid phase detector and a valve mechanism are installed in the piping that runs between the phase separator installed in the flow path of the viscous multiphase flow and the air vent that captures the gas phase containing mist discharged from the phase separator. A phase separation system characterized in that the J:Q self-valve mechanism closes (L) in response to a liquid phase signal detected by the liquid phase detector. (2) Phase fraction 1itl #The arm is a viscous group, the inlet of the phase flow and the viscous mixture) 1] It has a built-in strainer with a filtration layer that allows solid particles of a predetermined size or less contained in the flow to pass through, and after filtration, a scraper that removes the gas phase aggregated on the filter layer and removes coarse solid particles captured on the filter surface by sliding in a coarse row between the outlet through which the viscous mixed flow flows out and the filter layer of the strainer; Jii-(1) characterized in that it has a gas phase outlet for discharging the gas phase, and a coarse particle outlet for removing coarse solid particles captured by the filtration layer.
Phase separation system as described in Section. (3) Paragraph (1) and (
The phase separation system described in section 2). (4) The liquid phase detector detects the liquid phase, closes the valve mechanism, and then opens the valve after a predetermined period of time.
2. The phase separation system according to item 2.