JPH0131407B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a filtration device with a gas separator placed just before a flow meter, and is particularly suitable for mixing coal powder and liquid.
It is installed just before the flowmeter that measures high viscosity liquids such as COM, and prevents mixtures with more than a certain number of particles from entering the flowmeter, and also crushes mixtures with more than a certain number of particles and supplies them to the filter again. This invention relates to a filtration device with a gas separator for highly viscous liquids.

Conventionally, when measuring a highly viscous liquid such as COM, which is a mixture of heavy oil or other liquids with coal powder, using a flowmeter, a gas separator was installed just before the flowmeter, as shown in Figure 1. A filter is arranged to remove gases and impurity mixtures mixed into the liquid, respectively, and supply the liquid. When this liquid is supplied, the mixture that cannot pass through the cylindrical body of the filter is scraped off by the scraper and settles to the bottom. , a large tank was required at the bottom to collect the sediment. In addition, the filter tends to become clogged, which causes problems such as insufficient separation of gas mixed in the liquid, as well as a decrease in the amount of liquid supplied to the flow meter, resulting in a longer supply time.

In addition, in view of this, for example, a device as shown in Japanese Patent Application Laid-open No. 139713/1983 has been developed, but this pump pumps coarse solid particles larger than a predetermined value in the phase separation device from the drain. This is sent to the crusher via the pulverizer, returned to the original tank, and supplied again with new viscous multiphase fluid via the pump, and the concentration of the viscous multiphase flow mixture in the tank is constantly increasing. . In addition, the piping for returning the coal powder becomes long, and many solid particles remain in the piping, which may harden while the machine is stopped, making maintenance time-consuming.

The present invention was devised for the purpose of solving such problems and supplying liquid to a flow meter without waste with a simple structure.Examples will be explained below with reference to FIGS. 1 to 3. do.

In FIGS. 1 and 2, 10 is a tank that stands upright via legs 11, and an inlet 12 for supplying liquid is formed in the upper part of this tank 10. A cylindrical body 15 constituting a filter 14 is disposed within this tank 10.
5 has a large number of grid-like spaces extending from the inside to the outside as shown in FIG. Furthermore, this cylindrical body 15
may be in the form of a mesh using wires. A main shaft 18 that receives rotation from a motor 17 fixed to the top lid 16 of the tank 10 is provided on the center line of the cylindrical body 15 and is supported by the bottom surface below.
8 is rotatable with respect to the cylindrical body 15. A scraper 1 that rotates along the inner surface of this cylindrical body 15 has a
9 is provided, and this scraper 19 is configured to be rotated via an arm 20 fixed to the main shaft 18. A tank 1 is located in the middle of the tank 10.
A partition plate 21 is provided to divide 0 into upper and lower parts,
There is an outlet 1 in the tank 10 at the bottom of this partition plate 21.
3 is formed.

Furthermore, a liquid level detection switch 22 is fixed to the upper lid 16 of the tank 10, and this liquid level detection switch 22 has sensors 22a and 22b that detect the lower and upper limits of the liquid level during liquid supply, respectively.
2a and 22b are built in the lower part and the upper part and a protective tube 22c extends downward. This is the discharge valve 2 of the discharge pipe 23 which is also fixed to the upper lid 16.
4 to provide signals for opening and closing. Further, the conical cylinder 25 at the lower end of the cylinder 15 is formed with an outlet 26 for taking out the mixture that has not passed through the lattice-like space of the cylinder 15, and a pump 27 is connected to the shutoff valve 35 at the outlet 26. It is connected via a strainer 37. This strainer 37 is for removing coarse mixture that cannot pass through the pump 27. The pump 27 has a discharge pipe 28 on one side.
Connected to these are switching valves 39 each connected to a mill 38 , the other of which is connected to a mill 38 for comminuting the mixture of liquid to be measured supplied from pump 27 , which mill 38 is connected to a conduit 29 attached at one end to the upper part of tank 10 . is connected to. The pump 27, the mill 38, and the conduit 29 are designed to re-pulverize the liquid to be measured accumulated at the bottom of the tank 10, supply it to the upper part of the tank 10, and circulate it. Further, the conduit 29 is connected to the discharge pipe 28.
First and second gate valves 40 and 41 are arranged in this discharge pipe 28, respectively.

In such a configuration, opening the cutoff valve 35,
When the first and second gate valves 40 and 42 are closed and the switching valve 39 is opened so that the pump 27 and the mill 38 communicate with each other, and the supply of the liquid to be measured is started from the inlet 12, the liquid to be measured is first The gas along with the liquid is in tank 1.
At the same time, it enters the cylinder 15 from the top of the cylinder 15, passes from the inside to the outside, and is supplied from the outlet 13 to a flow meter (not shown). On the other hand, since the motor 17 is driven, the scraper 19 provided on the inner surface of the cylindrical body 15 contacts and rotates along the motor 17, thereby preventing clogging of the cylindrical body 15 and preventing small air bubbles from adhering to the inside of the cylindrical body 15. The mixture larger than a predetermined size is scraped up and becomes large bubbles, which float upward and accumulate at the top of the tank 10. Meanwhile, the mixture sinks below the filter 14. In this way, the liquid to be measured continues to be supplied.
When this liquid is supplied, the gas mixed with it accumulates in the upper part of the tank 10 and the level of the liquid to be measured decreases.
A signal from the sensor 22a at the lower limit position opens the release valve 24 and the gas is released. Then, when the liquid level rises again and reaches a predetermined position, the sensor 22b at the upper limit position operates and the discharge valve 24 closes. In this way, this discharge valve 24 is connected to the liquid level detection switch 22.
The opening and closing operations are repeated.

Further, the mixture that has sunk to the bottom of the filter 14 is supplied to the mill 38 from the outlet 26 along with the liquid to be measured by the continuous or intermittent operation of the pump 27, which is already in operation, and the mixture is pulverized. The thus pulverized mixture passes through the conduit 29 together with the liquid to be measured, is supplied to the upper part of the tank 10, is circulated, and is again supplied to the filter 14. Also tank 1
When the liquid to be measured is to be discharged from 0, the first and second gate valves 40 and 41 are opened, and the switching valve 39 is switched so that the discharge pipe 28 and the pump 27 communicate with each other.

As is clear from the embodiments described above, the present invention has a scraper 19 fixed to the main shaft 18 rotated by a motor 17 attached to the upper part of the tank 10 and capable of contacting and rotating along the inner surface of the cylindrical body 15 of the filter 14. A pump 27 is connected to the outlet 26 at the bottom of the filter 14, a mill 38 for crushing granules larger than a predetermined size is connected to the pump 27, and one end of the filter 14 is connected to the mill 38. Since the conduit 29 attached to the upper part of the tank 10 is connected to the upper part of the tank 10 and the liquid to be measured is circulated, there is no need for a large tank for collecting sediment as in the past, and it is possible to collect the mixture. By pulverizing and supplying the pulverized mixture to the filter in the tank again, the liquid to be measured can be completely supplied to the flowmeter without waste. In addition, since the scraper 19 rotates in contact with the inner surface of the cylindrical body 15, clogging of the lattice-like space of the filter is less likely to occur, and air bubbles mixed in the liquid can be completely separated, and the liquid can always be kept stable. Can supply to flowmeter. Furthermore, continuous liquid supply for a longer period of time becomes possible. In addition, the mixture enters the mill as soon as it is discharged from the bottom of the tank, and is supplied directly from the mill to the top of the filter, so the concentration of the liquid does not increase until it enters the tank. , the conduit to the tank will not get clogged. In addition, the pulverized mixture enters directly from the mill above the filter, resulting in a shorter conduit, which has significant benefits, such as less residual mixture in this conduit and easier maintenance. It will be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a filtration device with a gas separator according to the present invention, FIG. 2 is a route diagram showing the device of the present invention, and FIG.
The figure is an enlarged perspective view of the main part of the cylindrical body. 10 is a tank, 12 is an inlet, 13 is an outlet, 14
is a filter, 15 is a cylinder, 16 is an upper lid, 17 is a motor, 18 is a main shaft, 19 is a scraper, 20 is an arm, 22 is a liquid level detection switch, 22a, 22b are sensors, 22c is a protection tube, 23 is a discharge 24 is a discharge valve, 26 is an outlet, 27 is a pump, 28 is a discharge pipe, 29 is a conduit, 35 is a shutoff valve, 37 is a strainer, 38 is a mill, 39 is a switching valve, 40 is a first gate valve , 41 is a second gate valve.

Claims (1)

[Claims] 1. An inlet 12 is formed in the tank 10, a filter 14 is disposed in the tank 10 to filter the liquid to be measured that is supplied from the inlet 12, and the filter 14 is disposed in the lower part of the tank 10. In a filtration device with a gas separator formed with an outlet 13 for guiding the passing liquid to be measured out of the tank 10, the cylindrical body 15 of the filter 14 is attached to a main shaft 18 rotated by a motor 17 attached to the upper part of the tank 10. A scraper 19 that can contact and rotate is fixed along the inner surface of the filter 14, an outlet 26 is formed at the bottom of the filter 14, a pump 27 is connected to the outlet 26, and a mill for crushing coarse particles is connected to the outlet 26. 38, and further connected to this mill 38 a conduit 29 whose one end is above the filter 14 and which is attached to the upper part of the tank 10. Filtration device.