JPS6119284B2 - - Google Patents

Description

Detailed Description of the Invention The present invention uses a magnetic filter to collect inclusions in a fluid, then temporarily stops the fluid supply, demagnetizes the fluid, and blows gas to remove the inclusions. It relates to a purifying filter that removes the air, collects it at a predetermined location, and performs drying or other processing to purify the filter, and performs the filtering and purification by detecting overpressure and gas pressure and operating a valve.

Conventionally, so-called magnetic filters, which become magnetic by applying a magnetic field, are used to collect inclusions (including sludge-like substances) in the fluid to be treated, and then to purify the filter. Reverse injection into the filter and demagnetization have been proposed. In this case, depending on the type of fluid,
In some cases, the reverse injection fluid may not choose a free path or may not be able to sufficiently remove inclusions in the filter.
In addition, there are cases where the wet filter and inclusions cannot be removed unless they are dried with gas.

In view of the above-mentioned disadvantages in the use of conventional magnetic filters, the present invention aims to provide a purification filter with increased overefficiency. In addition, when overpressure is detected, the flow path for the fluid to be passed is closed and the flow path for purified gas is opened to remove and purify the inclusions collected in the filter, collect them at a predetermined location, and dry them. Processing using combustion or other methods, detecting the purification gas pressure, closing the purification flow path and opening the flow path for the permeated fluid;
It is also an objective to provide a filter that performs overworking.

Next, the present invention will be described with reference to one embodiment.
FIG. 1 shows a front cross-sectional view of one embodiment of the present invention, and
The figure shows a side cross-sectional view of the supply and discharge part of the filter.
FIG. 3 shows a front sectional view of a magnetic filter according to another application example.

In FIGS. 1 and 2, the affected fluid W is
In the direction of arrow 2A, it passes through the fluid pipe 2, the electromagnetic on-off valve VA (power source EA, electric circuit 2E), passes through the magnetic filter supply section 5, magnetic filter 1, flows into the drain pipe 12, and flows through the electromagnetic valve VA (power supply EA, electric circuit 2E). On-off valve VB (power supply
EB, electric circuit 12E) and guide the purified fluid B in direction 2B. At this time, the electromagnetic shutoff valve VC (power supply
EC, electric circuit 12E), solenoid on-off valve VD (power supply
ED, electric circuit 13E) are kept closed. The purified fluid flowing through the magnetic filter 1 and collected in the receiving portion 10 passes through the pipe 12 and is discharged as purified fluid B in the direction of arrow 2B. As the amount of excess fluid increases, the number of inclusions magnetically attracted or attracted to the inlet of the filter 1 and inside the filter increases.
As a result, the overpressure increases. This pressure change is detected by the sensor 6, a lower limit 6A and an upper limit 6B of the allowable pressure range are set, and when these are reached, a signal is sent, and when the upper limit 6B is reached, the valves VA and VB are
is closed, valves VC and VD are opened, and compressed gas D is blown in the direction of arrow 2D by receiving the power supply 7E of the compressor 7, which operates simultaneously, to the receiving section 10, magnetic filter 1, supply section 5, and piping 3. Through the heating circuit 8, the inclusions C are discharged in the direction of the arrow 2C and collected in the storage tank 9 as an inclusion accumulation layer 9A provided at a predetermined location, and the heating circuit 8 is energized by receiving the power source 8E to heat the inclusions. It can also be incinerated if necessary. For example, when the gas D passes through the inclusions C or the magnetic filter 1, it removes moisture and removes the magnetic fields N and S applied to the filter 1, making it easier to remove the inclusions from the inside of the filter 1. Therefore, the effect can be increased compared to simple backwashing using purifying fluid B. Initially, the pressure of gas D is
Although the pressure is high in order to resist overpressure, it gradually decreases as inclusions are removed, and when the inside of the filter 1 is completely purified, the pressure becomes normal. Receiving part 10
A pressure sensor 4 is also provided in the filter 1, and a lower limit 4A and an upper limit 4B are set. When the pressure range is between the upper limit 4B and the lower limit 4A, the compressor 7 operates to purify the gas in the filter 1, but when the pressure is lower than the lower limit 4A, When purification is completed, valves VC and VD are closed to stop the gas flow, valves VA and VB are opened, and the process is repeated again. At this time, the sensor 6 of the flow supply section 5 has also reached the lower limit 6A. The magnetic field 11 can also be applied to the magnetic poles N and S close to the magnetic filter, and not applied to other parts, such as by the outer shell 11A. In this way, by detecting overpressure and incorporating an automatic control circuit, it is possible to perform a certain amount of overwork continuously by alternately switching and repeating filtration of waste water and purification of the filter under automatic control. Fig. 3 shows how the magnetic field 11 is arranged so that the magnetic poles N and S are as close to the magnetic filter 1 as possible, and to prevent contact between the magnetic poles and the fluid, and also to prevent rust. In the fluid passage section, an embodiment has been shown in which a normal portion 1B and a thin portion 1A having a thickness of 1 mm or less are provided in contact with the magnetic pole NS. It can be used in the same way as in FIG. In this case, contrary to the illustration, waste water is passed through the liquid part 10, collected in the liquid part 5, and purified water is discharged in two directions of the piping. At this time, the valve is closed in the piping 3 to prevent it from flowing, and the overpressure is When it reaches the upper limit, it is also possible to close the valve of the pipe 2, open the valve of the pipe 3, and blow the gas D shown in FIG. 1 into the pipe 3 for backwashing. 1st
In the cases shown in Fig. 3 and Fig. 3, the compressor can be rotated while constantly detecting the gas pressure, and the power supply can be turned on and off to enable adjustment of the relationship between the upper and lower limit pressures of the sensor.

As already mentioned, the magnetic filter of the present invention can be used to clean the filter by a change in overpressure, and to open and close a flow path in response to a change in overpressure to blow compressed gas. By purifying, or by making sure that the purification is done without applying a magnetic field, or by applying a magnetic field during the purification, and if necessary, using a thin plate to protect the magnetic pole to which the magnetic field is applied.
By filtering and purifying the fluid, the filter can be used continuously with high efficiency, and the inclusions adsorbed by the filter are discharged by a jet of compressed gas, increasing the drying effect before being stored in the storage tank. Since the waste is collected in a container and processed by heating, drying and incineration are facilitated, and this series of processes can be carried out continuously and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of one embodiment of the present invention. FIG. 2 is a side cross-sectional explanatory view of the supply/discharge portion of the filter.
FIG. 3 shows a front sectional view of a magnetic filter according to another application example. 1...Magnetic filter, 11...Magnetic field, N, S
...Magnetic pole, 2,3,12,13...Piping, 2E,
3E, 12E, 13E...Valve coil, VA,
VB, VC, VD……Solenoid on-off valve, 2A, 2B, 2
C, 2D... Direction, D... Gas, W... Fluid affected, B... Cleaned fluid, C... Inclusions, 5... Supply section, 10... Receiving section, 9... Inclusions Storage tank, 6,4
...Pressure sensor, 7...Compressor, 8...
...Heating heater.

Claims (1)

[Claims] 1. In a filter device that adsorbs and collects inclusions in a circulating fluid using a magnetic filter that is made of magnetic material or that has magnetism or can be made magnetic by applying a magnetic field, an on-off valve is installed in the inlet pipe of the fluid to be treated. a purifying fluid discharge pipe, which is provided in communication with a flow supply part of the magnetic filter through the magnetic filter, and has an on-off valve in a position close to the flow reception part, which is in contact with a flow reception part provided at the other end of the magnetic filter; A gas blowing pipe is provided, and an inclusion discharge pipe that is open and closed is provided in contact with the inflow part of the magnetic filter, and a pressure sensor is provided in the inflow part or the inflow part of the magnetic filter. When the overpressure reaches a predetermined level, the on-off valve of the treated fluid introduction pipe and the on-off valve of the purified fluid discharge pipe are closed, and the on-off valve of the gas blowing pipe and the inclusion discharge pipe are opened and closed. and when the overpressure falls to a predetermined pressure, the on-off valve of the gas blowing pipe and the on-off valve of the inclusion discharge pipe are closed, and the on-off valve of the inlet pipe of the fluid to be treated and the on-off valve of the purified fluid are closed. A purification filter characterized by being equipped with a control circuit that opens the on-off valve of the discharge pipe.