JP3680934B2 - Contact device and liquid treatment system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contact device for purifying a liquid containing floating substances such as colloidal particles, and in particular, a pretreatment apparatus for efficiently aggregating and separating floating substances to be removed contained in the liquid. The present invention relates to a contact device that can purify raw water using only the contact device, and a liquid processing system in which the contact device is arranged as a part of another liquid processing device.
[0002]
[Prior art]
Conventionally, methods and systems have been proposed for purifying livestock wastewater containing manure such as cattle and pigs, or industrial wastewater containing chemical substances such as washing liquid and factory waste liquid.
[0003]
Such a conventional liquid treatment system will be described by taking pig farm wastewater treatment as an example. A conventional water treatment system for pig farm wastewater and the like includes a filtration treatment means for passing raw water through a screen or the like to remove solid suspended matters. Activated sludge treatment means for decomposing water-soluble organic substances by aerobic microorganisms, precipitation decomposition treatment means for precipitating water-soluble organic substances separated from raw water by this decomposition and separating into water and precipitates, And dehydrating means for dehydrating and removing water from the precipitate.
[0004]
More specifically, each of the processing means will be described. In the filtration processing means, when the raw water containing solid suspended matter such as manure passes through the screen, the suspended matter is captured by the screen and removed. The raw water from which the suspended solids are removed is temporarily stored in a storage tank, then transferred to a measuring tank, and flows into an activated sludge treatment tank as activated sludge treatment means for each amount of water that can be treated with activated sludge. In this activated sludge treatment tank, aerobic microorganisms biodegrade water-soluble organic substances such as nitrogen in raw water. The raw water biodegraded by this treatment means is sent to a precipitation tank as a precipitation decomposition treatment means. In this precipitation tank, water-soluble organic substances are precipitated at the bottom of the precipitation tank and separated from the water. After being discharged into a river or the like, the precipitate is transferred to a dehydrating means. In this dehydration processing means, it is dehydrated by a dehydrator to be a solid and discharged.
[0005]
Here, in the conventional water treatment system, in order to avoid enlarging the site and construction costs due to the increase in the size of the activated sludge treatment tank, the dehydrator washing water flows into the storage tank. It was.
[0006]
Therefore, because the washing water of the dehydrator dilutes so-called high-concentration raw water having a high organic matter load, the burden of aerobic microorganisms on organic matter decomposition in the activated sludge treatment means is reduced.
[0007]
[Problems to be solved by the invention]
However, in the conventional water treatment system, the high-concentration raw water cannot be sufficiently diluted with only the washing water of the dehydrator, and a larger amount of water is required. In addition, if the amount of raw water dilution increases, the amount of water to be purified increases, resulting in an increase in the size of the water treatment facility, resulting in initial costs such as construction costs and power consumption fees and water for liquid treatment. There has been a problem that running costs such as fees increase.
[0008]
In view of these problems, the present invention is a raw water (sewage) that is lightly contaminated, and has a smaller apparatus than conventional liquid processing apparatuses, reduces initial costs and running costs, and has a sufficient purification effect. In the liquid treatment method of the liquid treatment device, if the degree of contamination is extremely severe and the wastewater is treated directly by the liquid treatment system, the burden is large and it is not efficient. It is an object of the present invention to provide a contact device capable of preliminarily purifying water and treating raw water by reducing the burden of subsequent processing, and a liquid treatment system incorporating the contact device.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the contact device of the present invention according to claim 1 is characterized in that a liquid containing a suspended matter such as a colloidal particle is mixed in a magnetic field, and the liquid that has passed through the magnetic field mixing means. A micro air supply means for mixing high pressure micro air, an oxidant supply means capable of supplying an oxidant having a sludge volume reduction effect to the liquid, and temporarily storing the liquid mixed with the high pressure micro air for separation and separation. And a contact tank for performing a coagulation treatment.
[0010]
According to the contact device of the present invention, in the magnetic field mixing means, by pre-treating the molecules / particles in the raw water, a contact tank that has a simpler structure than the prior art can be used. It is possible to help the floating of colloidal particles and the like using micro air mixed with the air.
[0011]
The contact device of the present invention according to claim 2 is characterized in that, in the contact device according to claim 1, a flocculant supply means capable of supplying a flocculant having an aggregation promoting effect to the liquid stored in the contact tank. It is in the point which has further.
[0012]
According to the contact device of the present invention, the coagulation promoting effect of the coagulant can assist the coagulation of foreign matters such as suspended matters contained in the liquid, and promote the purification of the treated water.
[0013]
The liquid processing system of the present invention according to claim 3 is characterized in that the contact device according to claim 1 or 2 is disposed in a part of the liquid processing device to purify raw water having a high impurity concentration. It is used as a primary processing (preprocessing) means when performing.
[0014]
According to the liquid processing system of the present invention, particularly when the degree of contamination of raw water is severe, the processing load of other components in the liquid processing system is reduced, and suspended matters in the liquid are reliably removed. In addition, the quality of the treated water obtained can be improved, and the use of the treated water can be expanded.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an overall explanatory view showing a configuration of an embodiment of a contact device according to the present invention.
[0016]
The contact device according to the present embodiment includes a magnetic field mixing unit 61 that mixes a liquid (raw water) containing colloidal particles in a magnetic field, and a micro air supply unit 62 that mixes high-pressure micro air with the liquid that has passed through the magnetic field mixing unit 61. And an oxidant supply means 63 capable of supplying an oxidant having a sludge volume reducing effect to the liquid stored in the contact tank, and a flocculant supply means 64 capable of further supplying a flocculant having an aggregation promoting effect, The contact tank 65 for temporarily storing the liquid mixed with the high-pressure micro air in the contact device has a main configuration, and the raw water stored in a raw water tank (not shown) is contacted from the raw water tank using a water intake pump 66. In the process of circulating the raw water to the tank 65 through the raw water transfer pipe 67, various treatments are performed on the raw water using the above-mentioned means. It has been made to so that.
[0017]
Here, the magnetic field mixing means 61 has a mixer tube 71 and a pair of electromagnets 100. The mixer tube 71 is a cylindrical tube 72 made of ceramic or resin as shown in FIG. Is the main body. On the inner surface of the cylindrical pipe 72, the opposite polarities of the rows of two neodymium magnets 73 arranged so that N-pole neodymium magnets 73a and S-pole neodymium magnets 73b are alternately arranged are opposed to each other. The cylindrical pipe 72 is buried flush with the inner side surface. In the present embodiment, as shown in FIG. 1, the row of neodymium magnets 73 is embedded in the upper and lower positions inside the cylindrical pipe 72, and the neodymium magnet 73 has a magnetic force of about 10,000 Gauss. And
[0018]
Further, in the cylindrical pipe 72, a neodymium fin 75 made of a ceramic material having a neodymium magnet 74 having a magnetic force of about 11000 Gauss embedded in its surface is rotatably arranged in the circumferential direction. The neodymium fin 75 acts as a stirring fin on an object to be mixed that circulates in the cylindrical pipe 72. Specifically, in the present embodiment, the flat plate twisted in a spiral shape Two types of fins, a first fin 75a formed to rotate the object flowing through the mixer pipe in the clockwise direction and a second fin 75b formed to rotate in the counterclockwise direction, The cylindrical pipes 72 are alternately arranged in the axial direction. As shown in FIG. 2, the first fin 75a and the second fin 75b are alternately arranged with N-pole neodymium magnets 74a and S-pole neodymium magnets 74b along the direction in which the object to be mixed flows. It is buried.
[0019]
The mixer tube 71 having such a configuration has an electromotive force due to the magnetic force of the neodymium magnet 73 embedded in the inner surface of the cylindrical pipe 72 and the neodymium fin 75. Further, the neodymium fins 75 are configured by alternately arranging the first fins 75a and the second fins 75b whose directions of rotation are opposite to each other, so that the processing liquid can be stirred more efficiently.
[0020]
A magnetic field is applied to the outside of the mixer tube 71 to the neodymium magnets 74a and 74b of the pair of neodymium fins 75 disposed in the mixer tube 71. It arrange | positions so that the pipe | tube 71 may be pinched | interposed so that it may mutually oppose.
[0021]
Accordingly, a magnetic force, which is a repulsive force or an attractive force, can be applied to the neodymium magnets 74a and 74b by the magnetic field of the electromagnet 100, so that the neodymium fin 75 can be rotated in the circumferential direction by this magnetic force. ing.
[0022]
Thus, when the neodymium fin 75 rotates in the circumferential direction, the number of magnetic flux linkages penetrating the neodymium fin 75 among the magnetic fluxes between the pair of electromagnets 100 changes abruptly. Due to the change, an induced electromotive force is generated in the neodymium fin 75.
[0023]
Due to the influence of this electromotive force, the liquid molecules subdivided by the rotation of the neodymium fin 75 are charged as negative ions, and suspended matter molecules such as colloidal particles are charged as positive ions or negative ions. It has become.
[0024]
Note that the polarity of the electric charge of the suspended molecule depends on the direction of the electromotive force generated by the neodymium fin 75.
[0025]
Here, in particular, suspended matter molecules contained in liquids such as artificially produced industrial wastewater contain a mixture of many positive ions and many negative ions. If the polarities of the particles are not unified, it is difficult to efficiently perform the subsequent agglomeration separation. However, in this embodiment, the neodymium fin 75 is used to make the floating molecule either positive or negative. One side can be charged uniformly.
[0026]
Therefore, in the present embodiment, it is possible to improve the efficiency of the agglomeration separation subsequent to the subdivision charging process by the mixer tube 71 and the electromagnet 100.
[0027]
Furthermore, in this embodiment, the electromagnet 100 reverses the magnetic field applied to the neodymium fin 75 according to the properties of the liquid such as the polarity of suspended matter molecules.
[0028]
When reversing the magnetic field, the neodymium fin 75 switches its rotation in the direction opposite to the original rotation direction, so that the direction of the electromotive force generated by the neodymium fin 75 is switched in the reverse direction by switching this rotation. ing.
[0029]
When this electromotive force is switched, the charge polarity of the suspended molecule can be reversed.
[0030]
For this reason, since there are many positive ions in the suspended matter, the reversal of the magnetic field occurs when the electromotive force is applied in the direction to uniformly charge the suspended matter molecules to positive ions. By switching the electromotive force generated in the neodymium fin 75, the suspended matter can be uniformly charged to negative ions.
[0031]
Accordingly, it is possible to flexibly perform an appropriate subdividing charging process according to the properties of the liquid.
[0032]
In the present embodiment, the electromagnet 100 can change the strength of the magnetic field applied to the neodymium fin 75 according to the ion concentration of suspended matter molecules contained in the liquid.
[0033]
Thus, even when the ion concentration of suspended matter molecules is small, an effective electromotive force can be obtained by increasing the strength of the magnetic field, and the subdivision charging process can be performed appropriately.
[0034]
The micro air supply means 62 includes a pressurizing pump 76 and a buffer tank 77, and the pressurizing pump 76 has a treated water transfer pipe 78 constituting a transfer path of treated water stored in the contact tank 65. It is connected. Then, a portion of the treated water in the contact tank 65 supplied through the treated water transfer pipe 78 is used to generate high-pressure micro air. That is, high pressure micro air is generated by blowing air having a diameter of about several tens of μm from the pressurizing pump 76 to the treated water through an air supply pipe (not shown), and the high pressure micro air is generated in the buffer tank 77 by the air. It mixes with the raw water fed from the raw water transfer pipe 67.
[0035]
The contact tank 65 has a tank 79 that temporarily separates the liquid mixed with the high-pressure micro air and performs separation / aggregation treatment. In the vicinity of the bottom of the tank, an end of the raw water transfer pipe 67 is connected, and the raw water mixed with the high pressure micro air in the buffer tank 77 is released into the tank 79. In this embodiment, the air bubbles generated when the air bubbles are released are used to rapidly clean the tank 79 while adsorbing the suspended matter in the raw water.
[0036]
In this embodiment, the raw water mixed with the high-pressure micro air is added with an appropriate amount of oxidant by the oxidant supply means 63 before reaching the contact tank 65, and an appropriate amount by the flocculant supply means 64. Of flocculant is added.
[0037]
By adding the oxidizing agent to the raw water, the volume of the waste extracted from the raw water can be reduced, and by adding the flocculant to the raw water, the aggregation of the waste extracted from the raw water can be promoted.
[0038]
Further, immediately above the surface of the water in the tank 79 at the upper part of the contact tank 65, floating flocks F such as colloidal particles floating in the raw water released in the contact tank 65 are placed in the scum tank 80 adjacent to the contact tank 65. A scum removing means 68 is formed to open the scum removing port 81 that flows out to the bottom. The scum tank 80 is configured to filter out the scum S and return the treated water after removing the scum S to the raw water tank or the contact tank 65 again. Further, the flock F such as filth that settles at the bottom of the contact tank 65 is periodically removed by using a known air lifter.
[0039]
The tank 79 of the contact tank 65 is connected with a treated water transfer pipe for discharging treated water from which the floc F that has floated or settled has been removed to the outside. Is partly transferred to the micro air supply means 62 to be treated water containing micro air, and the other part is transferred to the raw water tank to be used for diluting the raw water or discharged. For example, it is used for reuse as industrial water or agricultural water.
[0040]
Next, the operation and action of the contact device will be described.
[0041]
First, raw water taken from the raw water tank using the water intake pump 66 is sent to the mixer pipe 71 of the magnetic field mixing means 61.
[0042]
In the mixer pipe 71, as described above, the raw water is stirred by the neodymium fin 75, so that suspended matters in the raw water are finely crushed and the size is made uniform.
[0043]
In the magnetic field mixing means 61 of the present embodiment, a cavitation phenomenon occurs in the raw water. When this cavitation phenomenon occurs, a hot spot is formed in the treated water, and an ultra-high pressure and a vacuum state are formed. In this state, the colloidal particles and the like in the raw water have an oxidation-reduction action, and the organic matter in the raw water is decomposed to make the size uniform. In addition, high molecular weight substances such as proteins are decomposed to reduce the molecular weight.
[0044]
In addition, an induced electromotive force is generated in the raw water that has been rotated at a high speed in the mixer tube 71 and the flow velocity has increased due to the interaction between the electromagnet 100 of the magnetic field mixing means 61 and the neodymium magnet 73 disposed in the mixer tube 71. However, the electromotive force can ion align the liquid molecules and colloidal particles. Further, the magnetic field mixing means 61 also acts on the zeta potential related to aggregation, and this zeta potential can be made substantially zero.
[0045]
The raw water in which molecules and particles are ion-aligned is mixed with high-pressure micro air by the micro air supply means 62 while being transferred to the contact tank 65 through the raw water transfer pipe 67, and an oxidizing agent and a flocculant are added. The
[0046]
In the contact tank 65, colloidal particles that are ion-aligned by the processing in the magnetic field mixing means 61 react with a very small amount of an oxidant and an aggregating agent to form a floc F while reducing the volume. The suspended matter such as colloidal particles that have become the floc F is adsorbed by the micro air bubbles of the raw water released in the tank 79 and rapidly floats on the surface of the raw water in the tank 79. Then, it is discharged out of the contact tank 65 together with a small amount of raw water from the scum removal port 81, and dewatering is performed in the scum tank 80.
[0047]
In addition, due to the particle size and the like, the filth that has settled and aggregated without rising inside the tank 79 may be, for example, an air lifter as described above, or a discharge port formed at the bottom of the tank 79. This may be removed, and this may also be supplied to the scum tank 80 and dehydrated.
[0048]
In the contact device configured as described above, a treated liquid (treated water) can be obtained below the water surface of the contact tank 65. This treated water can be used for industrial water, agricultural water, etc. in this state, and is returned to the raw water tank through the treated water transfer pipe 78 and used for diluting the raw water or mixing with high-pressure micro air. It can also be used.
[0049]
As described above, the contact device according to the present embodiment performs pretreatment on the molecules / particles in the raw water in the magnetic field mixing means 61, so that colloidal particles or the like can be obtained using the micro-a in the contact tank 65 having a simple configuration. Floating substances can be floated and collected to easily make floc F. By removing floc F, treated water can be obtained. Further, the treatment in the magnetic field mixing means 61 enables the dissolved contaminants to be decomposed and separated from the water molecules in addition to the removal of suspended matters, and the quality of the purification treatment can be improved. In particular, if raw water (sewage) is lightly contaminated, the initial cost and running cost can be reduced and a sufficient purification effect can be achieved with a smaller apparatus than conventional liquid processing apparatuses.
[0050]
And the contact apparatus of this embodiment can also be arrange | positioned in a part of liquid processing system, for example, can also be used as a primary treatment (pretreatment) means at the time of purifying raw water with a high impurity concentration.
[0051]
The liquid treatment system may be any treatment system, but for example, the liquid treatment system may be reduced to the treated water obtained in the contact device following the step of removing suspended matters such as colloidal particles performed in the contact device. Aggregation processing means that oscillates the ultrasonic waves in the surrounding area to aggregate the colloidal particles and disperse them from the liquid molecules, and aggregate discharge that adsorbs and precipitates the aggregates containing metal substances such as heavy metals of the colloidal particles by magnetic force A liquid processing system provided with processing means can be considered.
[0052]
As the agglomeration processing means, an electromagnetic coil is wound around the outer periphery, and a low-frequency ultrasonic oscillator that oscillates low-frequency ultrasonic waves in a frequency range of 50 kHz or less according to the concentration of the treated water. An example of the agglomeration processing pipe disposed is an example.
[0053]
When low-frequency ultrasonic waves are oscillated in the treated water by the low-frequency ultrasonic oscillator, liquid molecules that are charged irregularly among liquid molecules and colloidal particles that are randomly distributed are aggregated. The colloidal particles that are attracted to the wall surface side of the processing pipe and flow along the wall surface and are charged into positive ions flow through the central side of the aggregation processing pipe, and the liquid molecules and the colloidal particles are dispersed to Colloidal particles are aggregated together.
[0054]
An example of the aggregate discharge processing means is a discharge processing tank. This agglomerate discharge processing means adsorbs and discharges colloidal particles that have been agglomerated by a separation agglomeration process downward by a permanent magnet 28b such as neodymium.
[0055]
The agglomerate discharge treatment means is provided with a discharge treatment tank for storing treated water, and the agglomeration treatment pipe is connected to the bottom of the discharge treatment tank so as to contain the agglomerate. Water is allowed to flow in and permanent magnets such as neodymium are laid. And the aggregate in a charged state among the treated water which flowed in from the aggregation processing pipe is attracted | sucked by the magnetic force of the said permanent magnet, and is settled to the bottom part.
[0056]
The sediment collected at the bottom of the discharge treatment tank is discharged from the discharge port connected to the bottom of the discharge treatment tank to the outside of the tank.
[0057]
And the treated water from which the aggregate etc. were removed in the said discharge processing tank is discharged | emitted through the discharge pipe connected with the said discharge processing tank, and is used as industrial water or agricultural water.
[0058]
Note that the liquid treatment system is not limited to the above-described configuration. For example, the liquid treatment system further includes a deodorization treatment means for removing malodor from the treated water by oscillating high-frequency electromagnetic ultrasonic waves in the treated water. High voltage pulse processing means for applying a high voltage pulse to the treated water to separate and remove nitrogen from the treated water and generate ozone to decolorize and sterilize the treated water. From the colloidal particles, the liquid molecule fragmentation processing means for generating activated water that has been refined and activated, the oxidation-reduction processing means for returning the treated water ionized by the charging treatment to a stable state by oxidation-reduction reaction, A liquid processing system having a dehydrating means for dehydrating a precipitate, a central control means connected to each processing means and controlling each processing operation It may be.
[0059]
In this way, in the liquid treatment system, by performing the primary treatment of the raw water in the liquid treatment system in the above-described contact device, in particular, the treatment load of each subsequent means can be reduced and the raw water can be treated. it can.
[0060]
In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.
[0061]
【The invention's effect】
As described above, according to the contact device of the present invention, the magnetic field mixing means performs subdivision of various substances such as liquid molecules and colloidal particles contained in the liquid, charge charge processing, and ion alignment. Thus, the raw water treated by the magnetic field mixing means is mixed with high-pressure micro air, and the various subdivided substances are floated as flocs using the micro air bubbles, and the flocs can be removed. The raw water can be purified, and the liquid processing equipment can be downsized and the initial cost and running cost can be reduced.
[0062]
In addition, by using this contact device in the pretreatment stage of the liquid treatment in the liquid treatment system, particularly when the degree of contamination of the raw water is severe, the processing burden of other components in the liquid treatment system is reduced. Thus, suspended solids in the liquid can be reliably removed, the quality of the treated water obtained can be improved, and the use of the treated water can be expanded.
[Brief description of the drawings]
FIG. 1 is an overall explanatory view showing the configuration of an embodiment of a contact device according to the present invention. FIG. 2 is a cross-sectional view showing the structure of magnetic field mixing means of the contact device according to the present invention.
61 Magnetic field mixing means 62 Micro air supply means 63 Oxidant supply means 64 Industry agent supply means 65 Contact tank 66 Intake pump 67 Raw water transfer pipe 68 Scum removal means 71 Mixer pipe 72 Cylindrical pipe 73 Neojum magnet 73a N pole 73b S pole 74 Neojum element 74a N pole 74b S pole 75 Neojum fin 75a First fin 75b Second fin 76 Pressure pump 77 Buffer tank 78 Treated water transfer pipe 79 Tank 80 Scum tank 81 Scum removal port 100 Electromagnet S Scum F Flock

Claims (3)

Magnetic field mixing means for mixing a liquid containing floating substances such as colloidal particles in a magnetic field, micro air supply means for mixing high-pressure micro air into the liquid that has passed through the magnetic field mixing means, and sludge volume reducing effect on the liquid A contact apparatus comprising: an oxidant supply means capable of supplying an oxidant having a contact tank; The contact apparatus according to claim 1, further comprising a flocculant supply unit capable of supplying a flocculant having an aggregation promoting effect to the liquid stored in the contact tank. The contact device according to claim 1 or 2 is disposed in a part of the liquid treatment device and used as a primary treatment (pretreatment) means for purifying raw water having a high impurity concentration. And liquid processing system.

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