JPH0641899B2 - Method for measuring physical properties of fluid in fluid treatment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for measuring physical properties of a fluid in a so-called fluid treatment device (plant) such as petroleum refining, petrochemistry and the like.

[Prior Art] Conventionally, a fluid is connected to a system of a fluid treatment device with a measuring instrument for measuring PH and density of a fluid, and a system before the measuring instrument is connected with a separating device for separating unnecessary substances mixed in the fluid. The method for measuring the physical properties is described in, for example, JP-A-60-91233 (hereinafter referred to as Prior Example 1).
And JP-A-49-119382 (hereinafter referred to as prior art 2).

[Problems to be Solved by the Invention] In the method for measuring physical properties of a fluid according to Prior Art 1 described in the prior art, a fluid in a system is caused to flow into a settling tank constituting a separation apparatus and allowed to stand still, and an unnecessary substance caused by standing still This is a method of measuring by flowing a fluid that has become clean due to suspension or sedimentation into a measuring instrument, but intermittent separation by standing still takes a very long time, and a time lag occurs in the measurement time, which makes accurate measurement impossible. In addition, continuous measurement is not possible.

On the other hand, in the method for measuring physical properties of a fluid according to the second prior art, a large number of settling tanks are arranged in a multi-stage from the upstream side to the downstream side with a head, and the fluid is unnecessary from the upstream side tank to the downstream side tank due to overflow. While the substances are sequentially settled and separated in each tank, the supernatant water that overflows from the most downstream tank is made to flow into a measuring instrument for measurement, but this method allows continuous measurement of the fluid, but there is no problem. It takes a considerable amount of time for the fluid to reach the most downstream tank from the most upstream tank.

For example, if it takes 30 minutes to reach the above, the measured value is 30
The measured value of the fluid that flowed in a minute before, and if a different value of the fluid flowed into the most upstream tank during this time, that value cannot be measured immediately, so this method is also a measurement with a time lag. Therefore, the measured values are not reliable, which makes it unsuitable for measuring the physical properties of fluids such as oil plants, where the flow velocity and physical properties of the treated fluid constantly change depending on the production amount.

Therefore, the present invention, the target of the unnecessary substances mixed in the fluid is specified to the liquid content such as oil or water, in short, by separating the unnecessary liquid content instantly when the fluid that continuously flows passes through the separation device, An object of the present invention is to enable measurement with a measuring instrument immediately without a time lag, and thereby to be effectively applicable to measurement of physical properties of fluids such as oil plants in which the flow velocity and physical properties of the treated fluid constantly change.

[Means for Solving the Problems] The present invention for achieving the above-mentioned object is to connect a measuring instrument for measuring PH and density to the system of a fluid treatment device, and connect the measuring instrument to the system in the preceding stage of the measuring instrument. In the method for measuring the physical properties of a fluid, which is connected to a separation device for separating unnecessary liquid components such as water or oil mixed in the fluid of emulsification, the method for separating the liquid component by the above-mentioned separation device is a device for separating the fluid in the system. By continuously passing through the fiber layer constituting the liquid component to destroy the liquid component by collision with the fiber, and the liquid component that has been destroyed grows in a drop shape in the process of passing through the capillary tube between the fibers. The gist of the present invention is to allow a fluid, which has been cleaned by separating the liquid component due to sedimentation or floating of the liquid component due to a difference in specific gravity between the fluid and the mass of the liquid component generated by the growth, to flow into the measuring instrument.

[Example] The figure shows a schematic configuration for carrying out the method of the present invention.

Reference numeral 1 is a fluid treatment apparatus comprising a petroleum refining and petrochemical plant, to which is connected a measuring instrument 2 comprising a densitometer for measuring the density of the fluid in the system derived from this treating apparatus 1, that is, oil. The separation device 3 is interveningly connected in the system of the preceding stage of 2.

The separation device 3 is detachably mounted inside a casing 5 having an inlet port 4 in a reservoir chamber 6 connected to the inlet port 4, a guide pipe 7 connected to the reservoir chamber 6, and a tip of the guide pipe 7. It is composed of a cylindrical fiber layer 8, an outlet port 9 provided in the upper part of the casing 5, and a drain port 10 provided in the lower part of the casing. The inlet port 4 and the outlet port 9 are connected in the system.

The fiber layer 8 is a glass having an appropriate uniform density and a certain thickness, in which cohesive separation works effectively, and the physical properties of the fluid, such as the density and the PH value of water, are grasped, and at the same time, operating conditions are taken into consideration. It is a matter of theory that they are formed of appropriate fibers such as fibers.

[Operation] The fluid flowing in the system of the fluid treatment device 1, oil in this example, is
Fine water that continuously flows into the fiber layer 8 through the inlet port 4 and the guide tube 7 of the separation device 3, flows from the inside to the outside, and is mixed into the oil in an emulsion state when passing through the fiber layer. Are destroyed by the collision with the fibers, and the destroyed water is aggregated and grows in the form of drops in the process of passing along the flow between the fibers, depending on the difference in specific gravity between the mass of water generated by the growth and the oil. Moisture settles by gravity and is discharged from the lower drain port 10. Also, the oil separated by the settling of water and becoming clean flows into the measuring instrument 2 through the upper outlet port 9, and the density is continuously measured. become. A density adjusting device (not shown) is controlled according to the measured value.

In the above example, an example of oil density measurement in a petroleum refining and petrochemical plant was described. However, in a system that performs washing with acidic water and alkaline water in a petrochemical plant, PH
PH measurement is performed with the purpose of optimizing the injection amount of acid and alkali for adjustment, but in this case a PH measurement is connected to the drain port 10 because it separates a small amount of oil in water. Of course, the PH adjusting device is controlled by the instruction from the measuring instrument.

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained.

(a) the fluid is destroyed by collision with the fibers due to the fluid passing through the fiber layer, and the destroyed liquid is grown in the process of passing along the flow of the capillary between the fibers,
The liquid is separated by the difference in the specific gravity between the grown liquid and the fluid, that is, the liquid is instantly separated when the fluid passes through the fiber layer. Measurement can be performed, and highly reliable measurement can be performed. .

(b) In addition, since it is possible to capture and measure the state of the fluid at any given time that is constantly changing due to the instantaneous separation, it is possible to measure the physical properties of fluids such as oil plants where the flow velocity and physical properties of the treated fluid constantly change depending on the production volume. Can be effectively adopted.

[Brief description of drawings]

FIG. 1 is an explanatory view of an apparatus for carrying out the method of the present invention, and FIG. 2 is a sectional view of an upper separation apparatus. 1 ... Fluid processing device consisting of petroleum plant, 2 ... Measuring instrument, 3 ... Separation device.

Claims (1)

[Claims] 1. A measuring device for measuring PH and density is connected to the system of a fluid treatment device, and water or oil which is mixed in an emulsion state with a fluid in the system is unnecessary in a system in the preceding stage of the measuring device. In the method for measuring the physical properties of a fluid to which a separation device for separating a liquid component is connected, the method for separating a liquid component by the separation device is such that the fluid in the system is continuously passed through a fiber layer constituting the separation device to form a liquid component with a fiber. The liquid content is destroyed by the collision of the fibers, and the liquid content grows in the form of a droplet in the process of the liquid content passing through the capillaries between the fibers. A method for measuring physical properties of a fluid in an object processing apparatus, characterized in that a fluid that has become clean by separating the fluid by settling or floating of the fluid flows into the measuring instrument.