JP2000320483A - Eddy current pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eddy current pump which is optimum to high-efficient ion separation of sewage, in a sewage treatment system for sewage, such as factory drainage and polluted underground water. SOLUTION: In an eddy current pump 10 employed for a sewage treatment system, a boost passage S communicating with a suction port 11a and a discharge port 11b is formed in the outer periphery of an impeller 12 contained in a housing body 11. A pair of annular permanent magnet bodies 16 fixed on the inner wall surfaces of the housing body 11 and an end plate, exposed to both sides of the impeller 12 with different magnetic pole surfaces positioned in parallel and made to face each other, generates a magnetic field vertical to a boosting passage S at an outer peripheral part. In the sewage treatment system, in the process of the flow of sewage through the boosting passage S of the eddy current pump 10, a water molecule group to cover impurity, such as cations and anions, is subdivided through the operation of a magnetic field generated in the passage S, and the impurities are separated in an exposed state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vortex pump applied to a sewage treatment system for treating water to be treated, such as industrial wastewater and contaminated groundwater.

[0002]

2. Description of the Related Art Conventionally, as a vortex pump of this type, a pump housing in which an annular pump chamber communicating with a suction port and a discharge port is formed, and a drive shaft supported by the pump housing can be integrally rotated. The pump has an impeller that defines the pump chamber at its outer periphery and uses the pump chamber as a pressure increasing passage. The pressure of the fluid sucked from the suction port is increased by the rotation of the impeller and discharged from the discharge port. Vortex pumps have been employed for various applications.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sewage treatment system that treats water to be treated by effectively utilizing the above-mentioned vortex pump. It is to provide a pump.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized by a pump housing having an annular pump chamber communicating with a suction port and a discharge port formed therein, and a drive shaft pivotally supported by the pump housing. A pump chamber is defined at the outer periphery of the pump chamber, and the pump chamber is used as a pressurizing passage. The pressure of the fluid sucked from the suction port is increased by the rotation of the impeller and discharged from the discharge port. In the vortex pump, a pair of permanent magnets are fixed to both inner wall surfaces of the pump housing exposed on both sides of the impeller so that different magnetic pole surfaces face each other, and the outer peripheral portions of these permanent magnets are perpendicular to the boost passage. It is arranged to form a magnetic field.

In practicing the present invention, the permanent magnet may be constituted by an annular flat plate or a circular plate. Further, an ozone introduction pipe may be provided on an upper wall portion of the suction port of the housing, and ozone supplied from an ozone supply source may be introduced into the pump chamber through the introduction pipe. Is desirably arranged inside the suction port and close to the outer periphery of the impeller.

In the sewage treatment system employing the vortex pump according to the present invention, the sewage introduced into the vortex pump is formed by a pair of permanent magnets disposed to face each other in the process of passing through the boosting passage of the pump. Due to the action of the applied magnetic field, the water molecules covering the cations and anions of the impurities contained in the wastewater are subdivided, and the cations and anions are exposed, and the oxidation and reduction of ozone Reacts with chemicals to form harmless substances such as water and carbon dioxide. In particular, in the vortex pump of the present invention, the sewage is stirred under high pressure and the water molecules in the sewage are in an unstable state, so that the sewage is easily affected by a magnetic field, and the ion separation efficiency of impurities is increased. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sewage treatment system employing one embodiment of a vortex pump according to the present invention will be described below with reference to FIG. This sewage treatment system is a treatment system for treating sewage such as factory wastewater and contaminated groundwater, and includes a vortex pump (mixing pump) 10.

As shown in FIGS. 2 and 3, the vortex pump 10 has a cylindrical metal (for example, stainless steel) housing main body 11 and an impeller 12 housed in the housing main body 11. Housing body 11 is suction port 1
1a and a discharge port 11b, and an end plate 13 is liquid-tightly fixed to an open end 11c thereof. The impeller 12 is integrally rotatably fixed to an inner end of a drive shaft 14 supported on the housing main body 11, and has a plurality of grooves 12a formed in an outer peripheral portion thereof. Between the outer periphery of the impeller 12 and the inner peripheral wall of the housing body 11, an annular pump chamber communicating with the suction port 11a and the discharge port 11b is formed as a boost passage S. Note that a partition member 15 is assembled between the suction port 11a and the discharge port 11b, and the fluid sucked from the suction port 11a passes through the pressure increasing passage S
The pressure is increased by the rotation of the impeller 12 and the discharge port 1
1b.

On each inner wall surface of the housing body 11 and the end plate 13 exposed on both sides of the impeller 12, a pair of permanent magnet bodies 16 are arranged so that different magnetic pole surfaces (N-pole surface and S-pole surface) face in parallel. It is fixed to. Permanent magnet body 16
Is formed by an annular flat plate having a diameter larger than that of the impeller 12, and its outer peripheral portion is positioned so as to form a magnetic field perpendicular to the step-up passage S, and has a smaller diameter than the permanent magnet body 16. It is screwed to each inner wall surface of the housing body 11 and the end plate 13 together with the formed annular holding ring 17.

The suction port 1 of the housing body 11
An ozone introduction pipe 1 for introducing ozone is provided on an upper wall portion of 1a.
8 has its inner end inside the suction port 11a.
Is provided so as to be close to the outer periphery of the.

The vortex pump 10 configured as described above has
The first ion separator 21, the first and second filters 2 of the sewage treatment system shown in FIG.
It is connected to a sewage sedimentation tank 24 via the components 2 and 23, connected to an ozone generator 25 at an ozone introduction pipe 18 and connected to a second ion separator 26 at a discharge port 11b. Thus, the vortex pump 10 is provided with the sewage sedimentation tank 2.
4, ozone introduced from the ozone generator 25 is mixed with the sewage introduced through the first filter 22, the second filter 23 and the first ion separator 21 and discharged to the second ion separator 26.

The second ion separation device 26 is provided in the first reaction tank 2.
7, connected to the third filter 31 via the third ion separation device 28 and the second reaction tank 29,
A pressure pump 32 is provided between the second reaction tank 29 and the third filter 31 and between the second reaction tank 29 and the third filter 31. In addition, a flow meter 41 is provided between the second filter 23 and the first ion separator 21, and an outlet of the third filter 31 measures an impurity concentration of the water to be treated discharged from the third filter 31. A densitometer 42 is provided. A switching valve 43 is provided downstream of the densitometer 42. One of the outlets of the switching valve 43 is opened to the outside, and the other outlet is connected to the second filter 23 and the first ion separation device 21. Connected between

The ozone generator 25 includes an oxygen generator 51
And the cooling device 52, which generates ozone with oxygen supplied from the oxygen generating device 51, and supplies the generated ozone to the vortex pump 10 via the electromagnetic valve 53 and the check valve 54a. . Ozone is supplied between the vortex pump 10 and the second ion separator 26 from the ozone generator 25 via the electromagnetic valve 53 and the check valve 54b by the operation of the pressure pump 56. The flow meters 55 are provided downstream of the check valves 54a and 54b, respectively.
a and 55b are connected.

Next, a sewage treatment process by the above-described sewage treatment system will be described. Before describing the treatment process, the wastewater to be treated will be described in detail. The wastewater is a liquid having a high electric conductivity and is composed of a cationic substance, an anionic substance, a gaseous substance, and a nonionic substance as shown in Table 1 below. And other impurities.

[0015]

[Table 1] Cationic substance Ca²⁺, Mg²⁺, Na⁺, K⁺, Fe
²⁺, Mn²⁺, Zn²⁺, NH⁺ Anionic substance HCO_Three ^-, Cl^-, SO_Four ^2-, NO_Three ^-, C
O_Three ^-, HSiO_Three ^-  H_TwoBO_Three ^-, HPO_Four ^-, H_TwoPO_Four ^-, F^-, NO_Two ^-, HS^- Gas CO_Two, SO_Two, NH_Three, H_TwoS, CH_Four Nonionic substances Vegetable dyes, organic wastes Cationic substances, anionic substances, gaseous substances, nonionic substances
Around each impurity, the impurity itself is charged or extremely
Water molecules that are polar
Are attracted to the material and hydrogen bond with each other to mask impurities.
A water molecule group (water molecule group) is formed
You.

Returning to the description of the sewage treatment process, sewage such as factory drainage and contaminated groundwater stored in the sewage sedimentation tank 24 is taken into the first filter 22 by the intake pump P1, and then the vortex pump 10 is operated. The second filter 23
And the vortex pump 10 via the first ion separation device 21
It is taken in. At this time, the first filter 22 and the second
In the filter 23, dust, floating substances, and the like contained in the sewage are removed, and the filtered sewage is ion-separated in the first ion separator 21. That is, the water molecule group covering the impurities contained in the sewage is subdivided, the impurities are separated from the group, and the sewage containing the ion-isolated impurities and the non-ion-separated impurities is supplied to the vortex pump 10.
It is taken in.

The sewage taken into the vortex pump 10 includes:
Ozone supplied from the ozone generator 25 is mixed in the vortex pump 10. At this time, the impurities contained in the sewage which has been exposed by the ion separation chemically react with the ozone to generate water-insoluble substances, oxygen, carbon dioxide, water, hydrogen ions and the like as described below. (1) 2Fe ²⁺ + O ₃ + 5H ₂ O → 2Fe (OH) ₃ ↓ + O ₂
↑ + 4H ⁺ (2) Mn ²⁺ + O ₃ + H ₂ O → Mn (OH) ₂ ↓ + O ₂ ↑ + 2
H ⁺ (3) CNO ⁻ + 2H ₂ O → 2CO ₂ ↑ + N ₂ ↑ + 4H ⁺ (4) NO ₂ + O ₃ → NO ₃ + O ₂ ↑ (5) CO + O ₃ → CO ₂ ↑ + O ₂ ↑ (6) H ₂ S + O _{3 → H 2 O + S +} O 2 ↑ (7) C 6 H 4 (CH 3) 2 + 7O 3 → 5H 2 O + 8CO 2 ↑ (8) C 6 H 5 CH 3 + 6O 3 → 4H 2 O + 7CO 2 ↑ (9) C 2 H ₅ OH + 2O ₃ → 3H ₂ O + 2CO ₂ ↑ (10) CH ₃ (CH ₂ ) ₄ CH ₃ + 19O ₃ → 7H ₂ O + 6CO
₂ ↑ (11) 3CH ₃ CO ₄ CH ₃ + 8O ₃ → 9H ₂ O + 9CO ₂水 On the other hand, the water molecule group containing impurities that have not been ion-separated is generated in the process in which the sewage passes through the pressure passage S of the vortex pump 10 , A pair of permanent magnet bodies 16 arranged opposite to each other
By the action of the magnetic field formed by the above, the hydrogen bond of each water molecule is cut and finely separated to expose impurities. Thereby, the ion separation of the sewage in the pressurized passage S of the vortex pump 10 is promoted. In particular, in the pressurized passage S, the sewage is stirred under high pressure, and the water molecule group in the sewage becomes unstable, so that the sewage is easily affected by the magnetic field,
The efficiency of ion separation of impurities is increased.

In the vortex pump 10, water-insoluble substances produced by mixing with ozone, oxygen, carbon dioxide, water,
The sewage containing impurities unreacted with hydrogen ions and the like is supplied to the second ion separator 26 by the operation of the pressure pump 32, and the water containing the unreacted impurities is produced by the same operation as in the first ion separator 21. The molecular population is finely separated, exposing the same impurity.

When the sewage that has passed through the second ion separation device 26 is taken into the first reaction tank 27, the sewage taken into the first reaction tank 27 is stored for a predetermined time and sterilized and deodorized by irradiation with ultraviolet rays. Unreacted impurities contained in the sewage chemically react with the vortex pump 10 and ozone provided downstream thereof, and are insoluble in water as described above;
This produces oxygen, carbon dioxide, water, hydrogen ions, etc.

Further, in this sewage treatment system, the sewage discharged from the first reaction tank 27 is operated by a pressure pump 32 so that the third ion separator 28, the second reaction tank 29, the third filter 31, and the switching valve are provided. It becomes purified water via 43 and is discharged outside. At this time, in the third ion separation device 28, a water molecule group including unreacted impurities is finely separated by the same operation as in the first ion separation device 21, and the impurities are exposed. In the second reaction tank 29, the sewage is stored for a predetermined period of time, and unreacted impurities contained in the sewage chemically react with ozone in the same manner as described above, and substances insoluble in water, oxygen, carbon dioxide,
This produces water and hydrogen ions. In the third filter 31, insoluble substances contained in the sewage are removed. In the switching valve 43, the filtered sewage is supplied to the concentration meter 42.
If the measured value is smaller than the predetermined value, the switching valve 43 is connected to the outside, so that the filtered sewage is purified water and discharged to the outside. If the measured value is larger than the predetermined value, the switching valve 43 is switched to the third filter 3.
1 is connected to the first ion separator 21, and the filtered sewage is returned to the first ion separator 21.

In the above embodiment, the impeller 1
A pair of permanent magnet bodies 16 fixed to opposing positions on the inner wall surfaces of the housing body 11 and the end plate 13 exposed on both sides of the housing 2 are constituted by annular flat plates.
It may be constituted by a disk plate formed larger in diameter than the impeller 12. Also according to this, the same operation and effect as the above embodiment can be expected.

In the above-described embodiment and the modified example, the drive shaft 14 having the impeller 12 fixed to the inner end thereof so as to be integrally rotatable is supported only on the housing body 11 to form a cantilever structure. 11 and end plate 13
May be supported by both.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a sewage treatment system to which a vortex pump according to an embodiment of the present invention is applied.

FIG. 2 is a schematic sectional view of the vortex pump shown in FIG.

FIG. 3 is a cross-sectional view of the vortex pump shown in FIG. 2, taken along line 3-3.

[Explanation of symbols]

10 vortex pump (mixing pump), 11 housing body, 11a suction port, 11b discharge port, 11c
... Open end, 12 Impeller, 12a Groove, 13 End plate, 14 Drive shaft, 15 Partition member, 16 Permanent magnet body, 17 Press ring, 18 Ozone introduction pipe, 21
... first ion separator, 22 ... first filter, 23 ... second filter, 24 ... sewage sedimentation tank, 25 ... ozone generator, 26 ... second ion separator, 27 ... first reaction tank, 2
8: Third ion separator, 29: Second reaction tank, 31: Third filter, 32: Pressure pump, 41, 55a, 55b
... Flow meter, 42 ... Concentration meter, 43 ... Switching valve, 51 ... Oxygen generator, 52 ... Cooling device, 53 ... Electromagnetic valve, 54
a, 54b: check valve, 56: pressurizing pump, S: boost passage.

Claims (5)

[Claims] A pump housing having an annular pump chamber communicating with the suction port and the discharge port formed therein;
An impeller that is integrally rotatably mounted on a drive shaft that is rotatably supported by the pump housing and that defines the pump chamber at an outer periphery thereof and uses the pump chamber as a pressurizing passage; In the vortex pump, the pressure of which is increased by the rotation of the car and which flows out from the discharge port, a pair of permanent magnet bodies are fixed to both inner wall surfaces of the pump housing exposed on both sides of the impeller so that different magnetic pole faces face each other, The vortex pump according to claim 1, wherein an outer peripheral portion of each of the permanent magnets is arranged to form a magnetic field perpendicular to the boost passage. 2. The vortex pump according to claim 1, wherein said permanent magnet body is constituted by an annular flat plate. 3. The vortex pump according to claim 1, wherein said permanent magnet body is constituted by a disk plate. 4. The vortex pump according to claim 1, wherein an ozone introduction pipe for introducing ozone into the pump chamber is provided on an upper wall portion of a suction port of the pump housing. 5. The vortex pump according to claim 4, wherein an inner end of the ozone introduction pipe is arranged inside the suction port and close to an outer periphery of the impeller.