KR100697394B1 - Process for separation of pollutant among polluted water and apparatus for the same - Google Patents

Abstract

 A separation method and a separation device for quickly separating a large amount of abrasive soil water.

 The effluent water flows downstream from the upstream while stirring in the agitator tanks 31 to 37 sequentially.In the meantime, plural kinds of flocculants are sequentially added from the upstream to the downstream in the effluent water, and all kinds of coagulants are disposed at the most downstream position. By mixing and stirring for each type with a time difference so as to mix, the contaminants in the contaminated water are aggregated and separated.

Description

Separation method and separation device of contaminants in contaminated water {PROCESS FOR SEPARATION OF POLLUTANT AMONG POLLUTED WATER AND APPARATUS FOR THE SAME}

1 is a schematic diagram illustrating an example of a separation device of the present invention.

<Description of Symbols for Main Parts of Drawings>

A: Separator 2: Pump

31 to 37: stirring tank 38: compressor

39: pipe 40: air pipe

6: pipe 61, 62: reservoir (for pH regulator)

63, 65: storage unit (for adjustment)

 TECHNICAL FIELD This invention relates to the method and apparatus which isolate | separate the pollutants contained in dirty water, such as industrial wastewater, domestic wastewater, a pond, a river, and a sewer.

 Sewage water, such as commercial drainage, domestic drainage, ponds, rivers, and sewers, contains large amounts of filthy water (toxic substances, heads, sludge, food waste, etc.) that adversely affect the environment. For example, the abrasive fouling water of optical components in industrial drainage contains toxic fine particles such as transition metal elements and rare earth elements. It needs to be separated.

Currently, sewage water naturally sediments the sediments in the sedimentation tank and separates them from the liquid. However, this method does not only require considerable time until complete sedimentation, but also increases the size of the sedimentation tank in order to treat a large amount of sewage water. There is a need, and it requires a large cost both in time and equipment.

 In recent years, a method has been attempted to shorten the settling time by mixing and mixing flocculant in the contaminated water, and a large settling tank is required to treat a large amount of contaminated water. It is necessary to prepare a stirrer that can agitate the polluted water so that it can be stirred, and it is not possible to solve the problem of a large amount of the polluted water treatment.

Accordingly, an object of the present invention is to provide a separation method and a separation device capable of solving this problem in a prompt and large-scale separation process of soil contained in the waste water.

 Technical means employed by the present invention to achieve the above object is stirring by water flow while flowing effluent water containing filthy water from the upstream to downstream, and in the middle of the effluent water a plurality of flocculents downstream from the upstream This is a method of aggregating and separating the contaminants in the contaminated water by mixing them one by one with time difference and sequentially stirring the contaminated water. (Claim 1)

Further, in a plurality of agitating tanks communicating in parallel from the upstream to the downstream, the polluted water containing the pollutants is stirred by a water flow while sequentially flowing from the upstream to the downstream, and a plurality of kinds of the polluted water in the stirring tank in the middle. It is more effective to mix the flocculant of the contaminant in the contaminated water by mixing the condensing agent of the contaminant with the contaminated water one by one in succession from the upstream stirring tank to the downstream stirring tank. (Claim 2)

Since the sediment is effectively separated or the drainage after the sediment is separated, the pH value is about 7, so in the present invention, a pH adjuster for adjusting the pH of the sewage is incorporated into the sewage from the most upstream and the most downstream. And stirring with waste water. (Claim 3)

As an apparatus which can implement the method according to claim 1 or 2, a plurality of stirring tanks are arranged in parallel along the piping diagram of the waste water containing the waste water, and the waste water in the waste water in all or selected plurality of the respective stirring tanks. The plural kinds of flocculants which aggregates can be achieved by a separation device in which each kind is mixed in a time difference from the upstream side to the downstream side sequentially. (Claim 4)

In addition, one storage part is provided with respect to one stirring tank in all or several selected tanks, and each storage tank stores several flocculants which agglomerate contaminants in dirty water alternately for every tank, and these flocculants Can be achieved by means of a separation device in which each type is mixed in a stirring tank with a time difference sequentially from the upstream side to the downstream side. (Claim 5)

As a device capable of carrying out the method of claim 3, a separation device (claim 6) in which a pH adjuster for adjusting the pH of the effluent water is mixed in at least the upstream part and the downstream part, or at least the most upstream part and the downstream part. It can achieve by the separator which stored the pH adjuster which adjusts pH of waste water, and mix | blended this pH adjuster with the stirring tank located in the mixing tank from a storage part. (Claim 7)

In the stirring structure of the stirring tank of the present invention, it is possible to use a propeller-shaped stirring blade that uses, for example, a motor as a power source, but in terms of simplifying the device, saving energy, and suppressing noise, the stirring tank is used. It is most suitable to stir by the water force of the turbid water sprayed in. (Claims 8,9)

Example

 Best Mode for Carrying Out the Invention An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram schematically showing a separation device A. As shown in FIG.

Separation device (A) is a waste water tank (1), a pump (2), a plurality of stirring vessels (31 to 37), a sedimentation tank (4) for waste water, and a drainage tank from upstream (right side in the drawing). Each member aligned in the order of (5) and aligned downstream from the pump 2 is in communication with each other by the pipe 6.

 The agitator tanks 31 and 37 are provided with reservoirs 61 and 62 for pH adjusters, and the pH adjuster is introduced into the agitator tanks 31 and 37 through the pipe 39 by the compressor 38. have.

In addition, the agitator tanks 32, 34, and 36 are provided with storage portions 63 to 65 for the flocculant, and three different kinds of flocculants are stored, and the flocculant is fed to the pipe 39 by the compressor 38. It is made to flow into the stirring tank 32, 34, 36 through.

Here, the agitation tanks 31 to 37 will be described. The agitation tanks 31 to 37 are formed in a substantially columnar shape that is long in the up and down direction, and a shape in which the front becomes narrow from the middle portion to the lower end. And the pipe 6 from an upstream is piped to the upper side surface, and the pipe 6 which goes downstream is piped at the lower end.

The stirring structure of the stirring tank 31-37 has the strong water which flows in the dirty water suctioned from the pump 2 in the stirring tank 31, and the inflow water and the shape which the front-end | tip toward the lower end become narrow. The swirling water is generated to stir the polluted water, and the stirred polluted water is introduced into the stirring vessel 32 by virtue of the hydraulic power of the continuously introduced polluted water. .

The dirty water flowing into the stirring tank 32 is stirred similarly to the stirring in the said stirring tank 31, and is less than the stirring tank 32 by the hydraulic power of the dirty water which flows in continuously into the stirring tank 31, It flows in continuously and vigorously into all the stirring tanks, and it stirs and drains to the settling tank 4. As shown in FIG.

In addition, although illustration is abbreviate | omitted, for example, a large amount of plastic pieces are put in a stirring tank, it stirs with waste water, and in addition to the stirring in a vortex, stirring of the plastic piece which rotates in a waste water along a vortex, The stirring effect can be enhanced. Moreover, when putting a plastic piece, what is necessary is just to provide a sieve partition in a stirring tank so that it may not flow downstream with dirty water.

Next, the piping structure of the stirring tank 31, 32, 34, 36, 37 and the storage parts 61-65 is demonstrated.

The agitator tanks 31, 32, 34, 36, 37 and the reservoirs 61 to 65 are piped by the pipes 39 as described above. The pipe 39 piped is divided into two in the middle leading to the stirring tanks 31, 32, 34, 36, 37, and the split pipes 39, 32, 34, 34, respectively. 36 and 37) to the sides.

The compressor 38 and the reservoirs 61 to 65 are piped by the air pipe 40, and the compressor 38 transfers the air to the reservoirs 61 to 65, so that the pH in the reservoirs 61 to 65 is reduced. The regulator and the flocculant are injected into the stirring tanks 31, 32, 34, 36, 37.

 Compressor 38 is controlled by a timer (not shown) that is adjustable in time and in conjunction with the operation of pump 2, and when the pump 2 is operated, the operation starts and stops alternately at regular intervals. Doing.

Numeral 41 denotes a pH regulator and a coagulant injection regulator, in which a predetermined amount of the pH regulator and the flocculant is injected by adjusting the injection regulator.

7 is a drain valve, 8 is a waste discharge | discharge part, 9 is a drain part.

In addition, the separator is not limited to the illustrated structure, and may be, for example, increased in number of stirring vessels. In addition, the operation of the pump, the mixing timing of the pH adjuster and the flocculant, the replenishment, the injection amount adjustment, the drainage treatment, and the like are fully automated by the centralized control by the computer, thereby enabling unlimited continuous operation.

Hereinafter, the wastewater using the separation apparatus A of the above-mentioned structure, and the separation process of the wastewater in the wastewater are demonstrated one by one.

(1) The effluent water in the effluent water tank (1) is strongly introduced into the stirring vessel (31) by the pump (2), the effluent water is stirred, and a constant amount of the pH adjuster is injected from the storage portion (61).

(2) The turbid water stirred together with the pH adjuster in the agitating tank 31 is introduced into the agitating tank 32 by the continuously flowing tap water and stirred again, and a predetermined amount of the first flocculant is stored from the storage unit 63. Is injected.

(3) The polluted water stirred together with the flocculant in the stirring tank 32 is introduced into the stirring tank 33 by the continuous polluting water and stirred again.

(4) The polluted water stirred in the stirring layer 33 is introduced into the stirring tank 34 by the continuously introduced polluted water and stirred again, and a second amount of the flocculant is injected from the storage unit 64.

(5) The polluted water stirred together with the flocculant in the stirring vessel 34 is introduced into the stirring vessel 35 by the continuous polluting water and stirred again.

(6) The polluted water stirred in the stirring layer 35 is introduced into the stirring vessel 36 by the continuously introduced polluted water and stirred again, and a third amount of the third flocculant is injected from the storage unit 65.

(7) The turbid water stirred together with the flocculant in the stirring tank (36) is introduced into the stirring tank (37) by the continuously flowing turbid water and stirred again, and a certain amount of the pH adjuster is injected from the storage unit (62), And it is drained to the settling tank 4.

Stained water stirred, pH-adjusted, and coagulant mixed in (1) to (7) is gradually separated from the liquid and the contaminants in the middle, and completely separated when the sedimentation tank 4 is reached. ) Sediment settles.

(8) In the sedimentation tank (4), since the sediment settles, only the clarified liquid is drained to the drainage tank (5).

In this way, the soil in the wastewater can be separated.

When a certain amount of the pH adjuster and flocculant is injected, the compressor 38 is stopped once and resumes after a certain time, but the time until the resume can be mixed on average with all the contaminated water flowing in continuously. It is time that the chemical reaction of is performed effectively, and it is adjusted by the size of the stirring vessel and the number of stirring vessels.

Next, the result of a separation experiment using the separation apparatus on condition of the following is shown.

7 stirring tanks, all have a diameter of 70 mm, a length of 200 mm, and a thin end, and have plastic pieces.

Location of reservoir for pH adjuster and flocculant: same as the above embodiment.

PH of sewage water: 7

 Water used: Polishing waste liquid containing abrasives and abrasive residues mainly composed of transition metal elements and rare earth elements

Used coagulant;

First coagulant; Vent Knight Solution

Second coagulant; Aluminum Sulfate Solution

Third coagulant; Polymer Coagulant Solution

Mixing timing of pH adjuster and flocculant: every 30 seconds

Content of flocculant: 1% of wastewater flow

According to this separation experiment, it was confirmed that the apparatus usually has a processing capacity of 3001 / h.

Inferred from the above experimental results, it is thought that more foul water per hour can be separated by increasing the number or size of the stirring vessels. Moreover, a coagulant is not limited to what was used for experiment, If it has a coagulation effect, it can be used.

 In addition, in this experiment, it was confirmed that in addition to the abrasive waste liquid, the soil may be separated in the same way as the abrasive waste liquid even in other industrial wastewater, domestic wastewater, ponds, rivers and sewage.

 As described above, the present invention is a method and apparatus for separating filthy water by mixing plural kinds of flocculants with time difference while separating filthy water while continuously flowing filthy water, and thus, a large amount of filthy water without using a large sedimentation tank as in the prior art. The water can be separated quickly.

In addition, since the size of the whole apparatus can be reduced by the alignment of the agitator tank and the pipe form, a large amount of sewage water can be separated and treated without taking up a place.                     

 Furthermore, according to the inventions of claims 8 and 9, it is effective in terms of simplification of the separation device, energy saving, and suppression of noise, and it is possible to reduce the operation cost and preserve the surrounding environment.

Claims (10)

Stirred water containing the contaminated material is stirred by water flow while flowing from the upstream to the downstream of the stirring tank.In the meantime, a plurality of kinds of flocculants are mixed in the contaminated water one by one with a time difference sequentially from the upstream to the downstream. And aggregating and separating the contaminants in the contaminated water by stirring with water, wherein the stirring tank has a shape in which the front becomes narrow from the middle part toward the lower end. In a plurality of stirring tanks communicating in parallel form from the upstream to the downstream, the tainted water containing the pollutant is stirred by water flow while sequentially flowing from the upstream to the downstream, and in the middle of the plural kinds of the tainted water in the stirring tank. The flocculant is mixed one by one from the upstream stirring tank into the downstream stirring tank sequentially and stirred with the polluted water to agglomerate and separate the contaminants in the polluted water, and the stirring tank is narrow from the middle to the lower end. Separation method of soil in sewage water, characterized in that the losing shape. The method according to claim 1 or 2, A pH adjusting agent for adjusting the pH of the polluted water is mixed with the polluted water from the most upstream and the downstream and stirred with the polluted water. A plurality of stirring vessels are arranged in parallel along the piping diagram of the waste water containing the waste water, and a plurality of kinds of flocculants which aggregate the waste water in the waste water in all or selected plurality of the respective stirring tanks sequentially from the upstream side to the downstream side. Separating the contaminants in the contaminated water by mixing one by one with a time difference, wherein the stirring vessel is a shape of the contaminants in the contaminated water characterized in that the front is narrowed toward the lower end from the middle portion. All or selected plurality of each agitation tanks are provided with one storage part with respect to one agitation tank, and a plurality of types of flocculants which aggregate the contaminants in the contaminated water in each storage part alternately are stored one by one, and these flocculants are stored upstream. By mixing the scavenger in the contaminated water one by one with a time difference from the downstream side sequentially, the contaminants in the contaminated water are aggregated and separated, and the agitation tank is characterized in that the front is narrowed toward the lower end from the middle part. Separation device of dirt. The method according to claim 4 or 5, An apparatus for separating filthy water in filthy water, characterized by mixing a pH adjuster for adjusting the pH of the filthy water into at least the stirring layer located at the most upstream and the downstream. The method of claim 5, The storage unit provided in the stirring layer located at least in the uppermost part and the lowest part stores the pH adjuster which adjusts pH of wastewater, and makes this pH adjuster mix in a stirring tank from a storage part. Separation device of dirt. The method according to any one of claims 4, 5 and 7, Separating device of the waste water in the waste water, characterized in that the stirring tank is stirred by the hydraulic power of the waste water sprayed in the stirring tank. The method of claim 6, Separating device of the waste water in the waste water, characterized in that the stirring tank is stirred by the hydraulic power of the waste water sprayed in the stirring tank. The method according to claim 4 or 5, A large amount of plastic pieces are put in the stirring vessel, and a sieve separating apparatus is provided.

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