JPH10296016A - Magnetic separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the easy separation and recovery of a magnetic microparticle from a filter element under a simple structural design at the time of backwash. SOLUTION: This magnetic separation device is equipped with a filter element storage container 12 which captures a magnetic microparticle from an untreated water 3 to produce a treated water 5, an ultrasonic cleaning device provided on the container 12 and drain removing system valves 8, 17 connected to the filter element container 12. When backwashing the filter element 2, the magnetic microparticle sticking to the filter element 2 is peeled by ultrasonic wave. In addition, the magnetic separation device is equipped with a vibrator connected to the filter element storage container 12 and a vacuum pump connected to the container 12. Further, when backwashing the filter element 2, the interior of the container 12 is made dry by the vacuum pump and the magnetic microparaticle is peeled by the vibrator to be recovered by the vacuum pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic separation apparatus which is applied to condensing of a thermal power plant and separates fine particles in a liquid.

[0002]

2. Description of the Related Art A conventional magnetic separation device will be described with reference to FIGS. FIG. 4 shows a process at the time of magnetic separation of the fine particles in the raw water 3, and FIG. 5 shows a process at the time of back washing for removing and collecting the fine particles attached to the magnetic filter.

At the time of magnetic separation of fine particles shown in FIG. 4, a magnetic field is first applied to a filter element 2 by a magnet 1. Next, the valves 6 and 7 are opened, and the valves 8 and
9 is closed, and the raw water 3 is passed through the filter element storage container 10 by the pump 4.

[0004] The raw water 3 is filled with the filter element storage container 10.
When passing through the inside, the magnetic fine particles in the raw water 3 are captured by the filter element 2 and purified, and flow out as treated water 5. When the magnetic separator is operated for a long time, the magnetic fine particles are captured one after another, and eventually the filter element 2 is removed.
In order to cause clogging, it is necessary to regenerate the filter element 2 by performing backwashing to separate and collect the magnetic fine particles captured by the filter element 2.

At the time of backwashing shown in FIG. 5, first, the magnet 1 is demagnetized to make the magnetic field applied to the filter element 2 substantially zero. Next, the valves 6 and 7 are closed, the valves 8 and 9 are opened, and the backwash air 23 is sent from the air tank 22 pressurized by the air compressor 21 into the backwash water pressurized tank 20 and pressurized. Backwash water pressurized tank 2
, The backwash air 23 is sent into the filter element storage container 10 and the filter element 2 is pushed out.
Spray toward.

In the conventional apparatus, the cleaning effect is enhanced by injecting the backwash air 23 toward the filter element 2 and bubbling the backwash water 24 as described above.

[0007]

In the conventional magnetic separation apparatus, the magnetic fine particles captured by the filter element have been separated and recovered from the filter element by backwashing as described above.

However, iron hydroxide and the like, which are often contained in the condensate of a thermal or nuclear power plant, are in the form of a gel and, when adhered and captured by the filter element, have a large adsorptive power by the filter element. Was difficult.

Further, a large amount of backwash water is required for backwashing, a backwash water pressurizing tank, an air tank, and a backwash water treatment device are required, and a wide installation space needs to be secured. The present invention seeks to solve the above problems.

[0010]

[Means for Solving the Problems]

(1) A magnetic separation device according to the first aspect of the present invention provides a filter element storage container including a filter element that captures magnetic fine particles from raw water to generate treated water, and an ultrasonic wave provided in the container. A washing device, and a drainage removal system connected to the container, wherein at the time of backwashing the filter element, magnetic fine particles adhered to the filter element are peeled off by ultrasonic waves, and the magnetic fine particles peeled off via the wastewater removal system Is removed from the container.

In the above, the magnetic fine particles that are captured from the raw water when the treated water is generated and adhere to the filter element are subjected to ultrasonic cleaning during the backwashing of the filter element for removing the magnetic fine particles. From the filter element storage container via the drainage removal system, and can be recovered.

(2) A magnetic separation device according to the second aspect of the present invention is a filter element storage container having a filter element built therein for capturing magnetic fine particles from raw water to generate treated water, and is connected to the container. A vibrator, valves provided on the inlet and outlet sides of the container, and a vacuum pump connected to a sealed space including the container formed by closing both the inlet and outlet valves. When the filter element is backwashed, after the fluid in the container is discharged, the container is vibrated by a vibrator, and the magnetic fine particles captured by the filter element are suctioned by vacuum suction with a vacuum pump. The filter element is separated from the filter element and removed from the container.

In the above, the magnetic fine particles that are captured from the raw water when the treated water is generated and adhere to the filter element are removed by back-flush of the filter element to remove the magnetic fine particles by vacuum evacuation by a vacuum pump. The inside of the filter is dried, and in this state, vibration is applied by a vibrator, so that the filter element is easily separated from the filter element.

Further, the magnetic fine particles peeled from the filter element are evacuated by the vacuum pump inside the container for the filter element, so that the magnetic particles are discharged to the outside of the container and can be easily collected.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic separator according to a first embodiment of the present invention will be described with reference to FIG. In the present embodiment shown in FIG. 1, a filter element 2 is provided inside, a magnet 1 is provided on the side, raw water 3 is supplied through a pump 4 and a valve 6 in a lower part, and treated water is supplied through a valve 7 from an upper part. In the magnetic separation apparatus provided with the filter element storage container for discharging the filter 5, the filter element storage container is the ultrasonic cleaning function-added container 12,
A depressurizing valve 17 is provided at the upper part of 2, and a valve 8 for discharging water 25 containing filter catch is provided at the lower part.

In the above, when a magnetic field is applied to the filter element 2 by the magnet 1, the raw water 3 is passed through the ultrasonic cleaning function-added container 12, and when a predetermined amount or more of the magnetic fine particles adhere to the filter element 2, the magnetic fine particles The filter element 2 is backwashed in order to peel off.

When the filter element 2 is backwashed, first, the magnet 1 is demagnetized to make the magnetic field of the filter element 2 almost zero, and the pump 4 is stopped. next,
When water is contained in the container 12, the valves 6, 7,
8 and the pressure relief valve 17 are closed, the filter element 2 is ultrasonically cleaned by the ultrasonic cleaning function of the container 12, and the magnetic fine particles captured by the filter element 2 are peeled off. Thereafter, the valve 4 and the pressure relief valve 17 are opened, and the water in the ultrasonic cleaning function-added container 12 is discharged.

In this embodiment, since an ultrasonic cleaning function is added to the filter element storage container, it is possible to easily and satisfactorily peel off the captured matter of the filter element by activating the ultrasonic cleaning function. The backwash pressure tank, air tank and backwash water treatment device used in the conventional device are not required, and the device can be made compact and the installation space can be reduced.

A magnetic separator according to a second embodiment of the present invention will be described with reference to FIG. The magnetic separation device according to the present embodiment shown in FIG. 2 is provided with a pump 26 and a valve 9 in place of the pressure release valve 17 in the first embodiment. 1
2 is supplied with clarified water 27.

In the above, when the magnetic fine particles are separated from the filter element 2 and collected, the valves 6 and 7 are closed, the valves 8 and 9 are opened, the pump 26 is driven, and the clarified water 27 is provided with an ultrasonic cleaning function. Water is passed through the container 12, the filter element 2 is ultrasonically cleaned by the ultrasonic cleaning function of the container 12, and the magnetic fine particles captured by the filter element 2 are separated.

In the present embodiment, since the ultrasonic cleaning is performed in a state in which the clear water is passed, the magnetic fine particles can be more preferably peeled off from the filter element as compared with the first embodiment.

A magnetic separation device according to a third embodiment of the present invention will be described with reference to FIG. In this embodiment shown in FIG. 3, a filter element 2 is provided inside, a magnet 1 is provided on a side, raw water 3 is supplied to a lower part via a pump 4 and a valve 6, and treated water is supplied from an upper part via a valve 7. In the magnetic separation apparatus provided with the filter element container 10 for discharging the filter element 5, the filter element container 1
The exciters 11a and 11b connected to the filter element storage container 10 and the valve 15 and the filter 13
Pump 14, connected via a flexible joint 16a, 1 provided in a pipe between the lower part of the filter element storage container 10 and the valve 6 and between the upper part and the valve 7
6b, and a valve 8 connected to the connection side of the valve 6 of the flexible joint 16a to discharge the drain in the filter element storage container 10.

In the above, when a magnetic field is applied to the filter element 2 by the magnet 1, the raw water 3 is passed through the filter element container 10, and when a predetermined amount or more of the magnetic fine particles adhere to the filter element 2, the magnetic fine particles are separated. In order to perform this, the filter element 2 is backwashed.

When the filter element 2 is backwashed, first, the magnet 1 is demagnetized to make the magnetic field of the filter element 2 almost zero, and the pump 4 is stopped. next,
The valves 6 and 7 are closed, and the valve 8 is opened to drain the filter element container 10. After draining, the valve 8 is closed, the valve 15 is opened, and the vacuum pump 14 is started.

After the sealed space formed by the valves 6, 7, 8 and the vacuum pump 14 is in a dry state, the vibrators 11a and 11b are started to activate the filter element storage container 10.
Is vibrated to separate the magnetic fine particles from the filter element 2, sucked to the vacuum pump 14 side, and trapped by the filter 13.

Since the pipes on the raw water 3 side and the treated water 5 side are connected to the filter element container 10 via the flexible joints 16a and 16b, the vibrator 11
The vibrations caused by the vibrations a and 11b are cut off, and troubles caused by the vibrations can be avoided.

In the present embodiment, the magnetic particles can be easily separated from the filter element by vibrating with a vibrator after being in a dry state. A tank, an air tank, and a backwash water treatment device are not required, and the device can be made compact and the installation space can be reduced.

[0028]

According to the present invention, there is provided a magnetic separation apparatus comprising: a filter element storage container for capturing magnetic fine particles from raw water to generate treated water; an ultrasonic cleaning device provided in the container;
A drainage removal system connected to the container is provided, and at the time of back washing of the filter element, the magnetic fine particles adhered to the filter element are peeled off by ultrasonic waves. It can be easily peeled off and collected.

[0029] Further, a vibrator connected to the filter element storage container and a vacuum pump connected to the container are provided. During backwashing, the inside of the container is dried by a vacuum pump, and then the vibrator is used. By separating the magnetic fine particles and collecting the magnetic fine particles with a vacuum pump, the magnetic fine particles can be easily separated and recovered as described above.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a magnetic separation device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a magnetic separation device according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a magnetic separation device according to a third embodiment of the present invention.

FIG. 4 is an explanatory view of a conventional apparatus at the time of magnetic separation of magnetic fine particles.

FIG. 5 is an explanatory view at the time of back washing of the conventional apparatus.

[Explanation of symbols]

 Reference Signs List 1 magnet 2 filter element 3 raw water 4 pump 5 treated water 6, 7, 8, 9 valve 10 filter element storage container 11a, 11b vibrator 12 container with ultrasonic cleaning function 13 filter 14 vacuum pump 15 valve 16a, 16b flexible joint 17 Depressurizing valve 25 Filter trapped water 26 Pump 27 Clear water

Claims (2)

[Claims] 1. A filter element storage container containing a filter element for capturing magnetic fine particles from raw water to generate treated water, an ultrasonic cleaning device provided in the container, and drainage removal connected to the container. With the system,
When the filter element is backwashed, the magnetic fine particles adhered to the filter element are separated by ultrasonic waves, and the separated magnetic fine particles are removed from the inside of the container via a drainage removing system. 2. A filter element storage container incorporating a filter element for capturing magnetic fine particles from raw water to generate treated water, a vibrator connected to the container, and an inlet and an outlet of the container. Each provided valve,
A vacuum pump connected to a sealed space including the container formed by closing both the inlet side and the outlet side valves is provided, and when the filter element is backwashed, after discharging the fluid in the container, A magnetic separation apparatus, wherein the container is vibrated by a vibrator, and the magnetic fine particles captured by the filter element are separated from the filter element by vacuum suction by a vacuum pump and removed from the inside of the container.