JPS5980311A - Magnetic filter apparatus - Google Patents

Abstract

PURPOSE:To make the collection efficiency of the magnetic component in raw water constant and to reduce operation cost, by a method wherein a water quality sensing apparatus is provided to the outflow pipe of treated purified water and the introducing amount of raw water and the magnetic field output of a filter medium are controlled on the basis of the sensing result. CONSTITUTION:Raw water is introduced into a magnetic filter 1 from an inflow pipe 9 and discharged from an outflow pipe 12 as treated purified water while the magnetic components in raw water are collected by a filter medium. A water quality sensor 13 is provided to the outflow pipe 12 and the treated purified water is checked in said sensor 13 while the value thereof is transmitted to a control apparatus 10. When a large amount of magnetic components are contained in the purified water, the opening degree throttling is ordered to the opening and closing valve of the inflow pipe 9 from the control apparatus 10 to reduce the introducing amount of raw water. At the same time, output increasing order is issued to a current converter 14 and the magnetic field of an exciting coil 7 is increased. In addition, when the magnetic components are reduced to a predetermined value or less, the opening degree of the valve 11 is widened while the output of the current converter 14 is attenuated and the increase of the raw water introducing amount and the attenuation of the magnetic field are carried out to increase operational efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic filter device. More specifically, this Komei adjusts the electric current from the raw water to be treated containing magnetic components to the introduced product or the excitation to avoid forming a magnetic field.
) Rinni J, S1 company's ingredients in efficiency ratio 11111
-! This relates to a magnetic filter device.

Magnetic filters have been known as devices suitable for recovering Mll acid components such as iron from industrial wastewater such as high Uj scrubber wastewater and converter scrubber wastewater.

Near 1.11 Application 11 area of Noirter has been expanded,
For example, wastewater from a paper pulp factory, chemical factory wastewater, sewage containing suspended solids in sewage, bacterial goldstone wastewater such as activated sludge treatment ready water, fermentation liquid containing useful microorganisms, etc. For example, sulfuric acid salt, polymer flocculant, etc. are added to raw water containing 11+ components, and magnetite l-
(Magnetic particles consisting of r''e20a (hereinafter referred to as magnetic bamboo component) are added to form a so-called magnetic 760 block. (Magnetic particles captured and separated with a magnetic filter 11) The tsuku is backwashed, concentrated, and treated again with a magnetic filter to separate non-magnetic and magnetic components.
Magnetic components are recovered and recycled, unnecessary non-magnetic components are discarded, and useful 41 components are recovered.

Various types of magnetic filters have been proposed. Figure 1 shows a schematic diagram of an example of a magnetic filter.
Then, a multilayer mesh noilter made of Ill FA of a magnetic scale, for example, is installed in the cell 4 to a filter equipped with an outflow 1-13 that serves as an outflow of purified water after removing magnetic components and an outflow 1-13 that also serves as an introduction of backwash water. Media 5, filter media 5
A pole piece 6 is installed inside to generate a uniform magnetic field,
On the outside of the filter bellel 4, a return frame 8 is installed to surround the excitation coil 7 with /υ and the excitation coil 7 with /υ so as to surround the excitation coil 7. There is something e.

For example, raw water containing iron, such as blast furnace scrubber wastewater, may be introduced into a magnetic filter with a structure similar to the above to capture iron, or a magnetic component may be added to pulp mill wastewater and combined with the magnetic component. In the case of introducing raw water containing 1 (magnetic) to capture magnetic flocs, or adding raw water slurry containing 1 (magnetic) to 9 mt L to separate the magnetic and non-magnetic components, The following can be said.

However, from the operational point of view of the magnetic filter, the capture rate of magnetic components in the filter media is good when the output of the magnetic field is increased and when the amount of raw water introduced is decreased. That is, Jtl J)i:! Since the transfer of unrefined magnetic components to treated purified water (filtered IJJ liquid) is reduced, it can be said that the performance of the magnetic filter is fully demonstrated when considering only the capture rate of magnetic components. Increase or decrease in raw water treatment standard by 1r? Therefore, the operation - 1st strike will be increased. On the other hand, if the output of the Ill field is lowered and the raw water is increased, the operating cost will decrease, but the capture rate of d3LJ in the magnetic component Noir Tarmedia will decrease. Furthermore, with the raw water introduction fn and the magnetic field output constant, ll1
Looking at the water quality of treated purified water when carrying out an operation in which bamboo components are captured in filter media, it is found that immediately after raw water is introduced, it is treated as I! The transfer of the Ill lll components into the I+ purified water is less than e < r4 & the capture rate of the t/l components by the filter mesoino' is poor. However, when the introduction of raw water is constant11), this phenomenon occurs when the Flv is moistened, and the 141 lll components are always captured. J: 1''l is clogged with the magnetic components, making it difficult to introduce raw water and requiring backwashing (removal of the zero component).

If we estimate the change in the state of capture of magnetic components in the filter media when raw water is introduced as described above, it is likely that the change will occur as shown in the enlarged view in Figure 2 (Δ~DI). J, the state immediately after starting the introduction of raw water is shown in Figure 2 Δ
The magnetic ml wire 5 that constitutes the filter media is as follows.
8 shows the flow direction of raw water with an arrow J) and A f-j L t
The l&M component particles are captured in a row, and the magnetic component (a) passes through the gap between the 1ift fl line 5a and flows into the raw water without capturing part of the magnetic component (a). Later, as shown in Fig. 2B, the gap between the magnetic wires 5a is filled with magnetic component particles, and the magnetic component (a) in the raw water is transferred to the gap between the magnetic wires 5a and the flow of the raw water. Ninokkuri 1)? It will not be transferred to the treated purified water side without being treated. As the introduction of 11λ water continues and more than a certain amount of 1 component (1 component) is captured between the magnetic 11 fences F and 158, as shown in Fig. %lii component (a)
cannot resist the flow of treated purified water and is separated and transferred to treated purified water, resulting in a low F capture rate of magnetic components. Furthermore, if the raw water continues to be introduced in this state, the gaps between the μ-mesh fine wires 5a will be densely clogged with the magnetic components (a), and it will no longer be possible to introduce the raw water, and the magnetic components caused by the backwash water will be It is necessary to wash and remove. As described above, in the operation of capturing magnetic components in raw water using a magnetic filter, the capture rate of the magnetic f'1 component is determined according to the progress of raw water introduction from the start of introduction of raw water to the beginning of introduction and backwashing. changes and is not constant.

Figure 3 is a graph showing an example of the capture situation.At the beginning of the introduction of raw water into Figure 2, the capture rate of magnetic components is poor, but the capture rate gradually increases, and as shown in Figure 2B. It reaches its highest level in the middle of the introduction of raw water, but as shown in the latter half of Fig. 2, I + li increases as the amount of magnetic components captured increases.
The capture rate decreases, and the capture performance finally reaches the introduction amount 1 in Figure 2 (1).
1J, and backwashing process μ becomes necessary.

However, in order to operate the magnetic filter efficiently by minimizing the power consumption for forming the magnetic field, it is necessary to keep the trapping force of the porcelain bamboo constant at all times. At the initial stage of introduction (when the captured state of the positive component is as shown in Figure 2 A), the medium amount of raw water introduced per hour may be lowered or the power supply for magnetic field formation ffi! Do you want to raise i?
15 or both for 48 lines and 1j. Raw water y) Input rule (when the magnetic component capture state is j in Figure 2 B, and the uni-11-active capture state is #1), the amount of raw water introduced per unit time should be increased. , or reduce the supply amount of magnetic field forming power, or perform both in the same way.Furthermore, in the later stages of raw water introduction (the state of capture of magnetic components becomes as shown in Figure 2 C, it is difficult to maintain a normal capture state). Tonatsu/j
(case), it is necessary to reduce the amount of raw water introduced, increase the amount of magnetic field forming power supplied, or perform both in parallel.

The present invention is directed to the treatment of raw water containing magnetic components.
3. By automatically adjusting the amount of raw water introduced and the amount of power supplied to form the magnetic field, the capture of magnetic components by the filter media is maintained in a good condition, resulting in low operating costs and constant efficiency. The present invention provides a magnetic filter that captures magnetic components. However, the present invention provides an inflow pipe for raw water to be treated containing magnetic components and a treatment F.
J! A filter media made of a magnetic material that has the function of capturing magnetic components is installed in a coos equipped with an outflow pipe for purified water, and an excitation coil that forms a magnetic field when energized is placed around the filter media. In a magnetic noirter device, an on-off valve is installed in the inflow pipe of the raw water to be treated containing magnetic components to adjust the introduction of the raw water, while a water texture sensing device for the treated purified water is installed in the outflow pipe of the treated purified water. and a current converter that adjusts the current supply to the excitation coil according to the signal from the water sensing device.
The gist is a magnetic filter device including a control device (Sj) that commands the flow rate and also commands the on-off valve to adjust the introduction of raw water.

The present invention will be explained below based on one embodiment and one drawing.

Figure 4 shows the magnetism of the present invention), f Luther! li! 1lfiT
1llt! This is the essential diagram. In the figure, 1 is a magnetic filter, which is structurally the same as the one shown in FIG. This is omitted. 9 is a raw water inflow pipe containing a magnetic component, and an electric port is connected to this from the control device H10.
On-off valve 1 with 1m mark on Ill command with 3 sections
1 is installed and the introduction of raw water is adjusted. 12 is magnetic 1 in raw water! This is an outflow pipe for the treated purified water after the 100% fraction is captured by the filter media 5, and the water quality such as the amount of residual magnetic components and turbidity Iff in the treated purified water that is discharged is measured and the results are sent as electrical signals. Instead, the water texture sensing device 13, which is sent to the C control device FI 10, is asked.

The I/I LL current converter changes the power supplied to the excitation coil 7 in accordance with commands from the control device 10 to increase or decrease the output of vAs in the C filter media 5; The control device 10 is controlled by an electric signal from the water quality sensing device 13 to open the valve during the above period in response to the presence of a II bamboo acid component in the purified water of a certain value or more or when the concentration of the II bamboo acid component is below a certain value of 116. Command patterns for increasing/decreasing the opening of the coil 11, increasing/decreasing the amount of raw water introduced, or increasing/decreasing the amount of power supplied from the current converter 14 to the excitation coil 7 are stored.

The magnetic filter device of the present invention has the above-mentioned configuration, and it is operated (Secondly, power is input to the control device, and the raw water is heated to a temperature of 1°C. The raw water is introduced into the magnetic filter 1 from the inflow pipe 9.The magnetic components in the raw water are captured by the filter media, and the treated purified water is discharged from the magnetic filter through the outflow pipe 12, and is re-evacuated to the water sensor 13. , At the initial stage of introduction of raw water, the trapping behavior shown in Figure 2 above is shown by △.
The magnetic ('I) acid component was not sufficiently captured by the filter media 5 and partially migrated into the treated purified water, and it was detected by the water texture sensing device 13.
The detected value is converted into an electrical signal and transmitted to the control device 10. tii'I of A is set in advance.
If the C number is 111 or more, the on-off valve 1 is
A command to throttle the opening is transmitted to 1, and the amount of raw water introduced is reduced. At the same time, a command to increase the current output from the current converter 14 is transmitted to the current converter 14, and the excitation coil 1! & The field is increased, and the capture of the magnetic component by the Luther media 5 is strengthened.Then, the magnetic component is
(See Figure 2 B above)
, the transfer of magnetic components into the treated purified water 1'7 sa decreases and its content exceeds a certain value, and the detection result is transmitted to the control device 10 as an electrical signal by the water feel sensor 13, and the control device 10 In response to the command to increase the opening 111 of the on-off valve 11 issued from U, the input of raw water increases, and the amount of power supplied to the current converter 14 is attenuated, and the magnetic field output to the excitation coil is attenuated. , which increases operating efficiency (
(in case of normal operation). Furthermore, as a result of continuous introduction of raw water, magnetic components in the filter media 5 accumulate as shown in FIG. 111 drawn from magnetic thin wire
When it is transferred to the treated purified water, the water sensor 13 detects this and sends an electrical signal to the control device 10. () Similarly, a command to increase the power supply is issued to the throttle of the on-off valve 11 or the current converter 14, and the amount of raw water introduced is attenuated or (the IG magnetic field output of the co-excited q-oscillation coil 7 is increased). It is.

The command to enter the backwash process is determined by programming the following three points or a combination thereof.

■ Time determined by the timer ■ When the water quality of the treated water or the target treated water quality calculated from the water quality of the raw water and treated water has become poor or below the water quality ■ Pressure and force before and after (up and down) the filter media 5 When the pressure loss of the refilter media is falsified and a pressure loss greater than - chamber occurs, that is, when the situation D in Figure 2 begins to develop, Example [Method 1: Secondary sewage is used as the raw water to be treated. The treated water was selected and SS was removed using the apparatus of the present invention under the following conditions.

Magnetic field (magnetic culm strength 1 good): 3KO0 constant raw tap water speed (linear speed IJ[): 25 On+ /b
r Constantly heated FeaOa powder (vs. raw water): I Eim (Izl (average particle 1 ¥0.5μw+) 1ii!l Aluminum acid (vs. raw water): 10mM
A polymer-flocculant (vs. raw water): 0.5 m (]/vertical 1 heavy water water quality 1) II: 6.8 SS Near 11141/Bun COl, ): 61+1 (1/vertical ``result''>rp person++, 'r (7) Raw water SS@GO (7II
88% of the treated purified water after passing through the device of the present invention.
@C and (Go-C)/Go as processing performance IIi
When I plotted the captured state on a graph with the elapsed filtration time on the horizontal axis, it turned out as shown in Figure 3. In the figure, when the processing performance is 1.0, it means that 100% (complete) processing is being performed.

Magnetic field: 3 KOe Constant raw water flow rate: △ Initial stage of introduction: 100 m/br at first, then gradually increased to 250 m/l+r. Middle stage of introduction of B: Initially 250 m/l+r, then gradually increased to 250 m/l+r. Decreased to 1001+1/hr Late introduction of 0...At first 100m/hr, then gradually decreased to 50m/hrIntroduction amount 1#J...-Initially 50m/hr, then gradually decreased to 30m/l+rOthers The conditions were the same as in Experimental Example 1 [Result 1] The results were as shown in Fig. 5, and the processing performance decreased as the filtration time elapsed, but did not decrease as in Experimental Example 1.

Example 1 Magnetic field: Initial introduction of Δ...at first 5 K Oe and then gradually increasing to 3
Mid-term introduction of B...at first 3K Oe and then gradually 4K
Increased to OO 0 out of 9 people...at first 4 KOe and then gradually 5 K
In the final stage of introduction, increasing to Oc...first 5 KOs (! and then gradually 7 Ks)
Increased raw water flow rate up to Oe 11T: 250m/l+r Constant A and other rows A have the same E results as in Experimental Example 1] The results shown in Figure 6 are loud, and the late introduction of C and the final stage of introduction of 1). Experimental Example 1 Bad processing performance did not decrease.

Example "Method" Magnetic field and raw water flow rate: Initial introduction of △...At first, the magnetic field was 5KOe and the raw water flow rate was 100 m/hr, and then gradually increased from 5KOe to 3K.
The speed increases to 200m/hr while lowering the speed to Oe.

Mid-term introduction of B...At the beginning of lυ, Ij field 3KO (!S) Started with raw water flow rate of 250 m/hr, and then gradually increased to 200 m/hr.
,'br, 150m/lo゛, decreased to 100m/l+r, 150I! When l/hr, 4KO t41'a
Increased to C+.

Introduction of C...First, start with a magnetic field of 4 KOe and a raw water flow rate of 100 m/hr, and then gradually increase the flow rate to 50 m'/hr.
l+r is decreased and ilm is increased to 5 K Oe. At the end of the introduction phase...at first, the magnetic field was 5 KOe.

The raw water flow rate started at 5'0 +n/l+r, and then gradually decreased to 30 m/ll'r.
)/Go starts to decrease further (for example, when it becomes 0.7 or more), immediately perform backwashing.

Other conditions were the same as in Experimental Example 1 [Results] The results shown in FIG. 7 were obtained, and the decrease in processability flu was small.

The magnetic filter device of the present invention, as mentioned above, is equipped with a water-sensing sensor in the outflow pipe of treated purified water of the magnetic filter, and an electrical sensor based on the sensing result.
Based on the instructions from the two-control tl'll device, the amount of raw water and the output of the filter meso-r It is intended to reduce the amount of carbon dioxide, and its industrial value is great.

[Brief explanation of the drawing]

Figure 1 shows the magnetic filter in cross section.1. : Outline diagram,
Figure 2 is a graph showing the state of capture of magnetic components in the magnetic filter;
Figure 4 shows an example of the present invention with a magnetic filter device +N (
1) Outline diagram, Figure 5 shows the state of capture of magnetic components by the 1-field C router in Experimental Example 2. FIG. 7 is a graph showing the state of capture of the magnetic v1 component by the magnetic filter in Experimental Example 4. 1...Magnetic filter 4...Case 5...
・Filter media 6...Pole piece 7...
・Exciting coil 8...Return fly l\9・
... Inflow condition 10 ... Control device 11 ... Opening/closing valve 12 ... Outflow pipe 13 ... Water sense detector 14 ... Current converter 15 ... Timer agent Patent attorney Tsutomu Seiri Figure 1 Figure 2 costume No. 4 Go to Figure 1 (#, -j Tsuba Figure 6 C.

Claims (1)

[Claims] 1 Inflow pipe and place for raw water containing magnetic components 111 1! I
! A woofer equipped with a purified water outflow pipe is equipped with an I geometry for capturing magnetic components (a noil termimeter j' consisting of an axial axis of 1/l 1'31 is installed, and a 1 & field is formed by energization. An excitation coil is set up around the filter media with lυ in the Luther apparatus, and H
(Introduction of the raw water to the inflow pipe of the raw water containing one component
4i: RGJ the on-off valve to be adjusted, while processing I'J! A water texture sensing device for treated purified water is installed in the purified water outflow pipe ().
Furthermore, the electrical signal from the water darkness 1 sensing device instructs the current converter that adjusts the amount of current supplied to the excitation coil fl\ to adjust the supplied current, and then The magnetic filter device is characterized in that it is equipped with a control neck that commands the adjustment of the suspension to the force of raw water.