JP3347643B2 - Deoxygenation deaerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The disclosed technology relates to the technical field of the structure of a deoxygenation deaerator for preventing red water and rusting in water facilities such as domestic water pipes, cooling towers and boiler facilities of various factories. Belong.

[0002]

2. Description of the Related Art As is well known, the improvement of citizen's life is largely supported by the rise of various industries, and the quality and quantity of citizen's life and industry are improved in combination. .

[0003] In civil life and industrial facilities, various water utilization facilities such as boilers and heat exchangers are widely used as well as living facilities such as water pipes and cooling towers. Therefore, it is strongly required that the water used by the water use facility be pure and clean water free from contamination by bacteria and the like. Normal water such as water contains dissolved oxygen of several percent (the amount of dissolved oxygen contained in drinking water is usually 10 to 11 ppm at 10 ° C, and 8 to 9 pp at 20 ° C).
It has been found that reducing the oxygen dissolved in this water suppresses the oxidation reaction in water utilization facilities. In a process in which such dissolved oxygen-containing water is used by flowing through water facilities, the dissolved oxygen causes rust in so-called domestic water pipes or water storage tanks. Of course, there are cases where it is inappropriate to use it appropriately for general daily use, and in production facilities etc., the function is impaired over time due to rusting of the boiler etc. due to the dissolved oxygen. There was a fatal drawback.

In addition, red water is a substance in which iron pipes of water supply are oxidized and rusted, and water becomes red and turbid. The water is often damaged in apartment buildings such as condominiums in which water is stored once in a receiving tank. Many buildings with water supply facilities installed using galvanized steel pipes during the building rush season are seriously affected by the generation of red water.

Subsequently, a lining steel pipe was developed and used as a water supply pipe in recent years. However, since iron is exposed at a tip portion joined with a screw, even if there is no abnormality in the lining portion, a slight seam is formed. Oxidation occurs intensively in the exposed part of iron, and rust grows in a bumpy shape (so-called bumpy rust), not only red water is generated, but also the pipe line is narrowed and the amount of water supply is reduced. .

On the other hand, various techniques have been developed to remove dissolved oxygen from city water or the like using a dissolved oxygen. For example, a magnetic field treatment method, an electrostatic treatment method, an ion treatment method, an electronic treatment method, and a membrane treatment method have been developed. Although it has been devised, the first processing method has many parts that are theoretically impossible, and is impractical in design,
Also, in the second treatment method , there are many problems of applicability depending on the quality of the water to be treated, and there is a tendency to be poor in practicality, and in the third treatment method , the scale component is colloidal. Although it is a scale prevention method, there is a drawback that it is necessary to keep washing constantly, otherwise scale adhesion occurs,
There is a neck causing the time function deterioration, in the fourth processing method <br/>, after giving an electron to the water, the corrosion to a method of reducing the electron depriving metal during metal corrosion principal The cause has a drawback that the degassing effect is thin, and in the last fifth processing method , a pretreatment for clogging of the film is required, so that deterioration of the film occurs,
Since the film is made of resin or the like, there is a problem that the film is weak to temperature. Therefore, when the film is deteriorated, it needs to be replaced, resulting in a problem that the cost is increased.

[0007] There is also a technique for adding dehydration agents such as hydrazine to boiler water to deoxygenate them. However, since the occurrence of carcinogens has recently been recognized, ordinary use is hindered. There are drawbacks.

[0008] Also, the aqueous solution of polyphosphoric acid for city water, and the sodium metasilicate (authorization as a food additive) was injected into the water receiving tank, a method such as to extinguish the red color by reacting phosphoric acid and iron However, it is necessary to constantly inject chemicals, strict control of injection concentration under the rust prevention manager is required, and long-term drinking may reduce calcium in the body and may make bones brittle <br / > there is not the degree of.

Further, in a river in an overcrowded area, there are many cases in which factory drainage, a water outlet from a city wastewater treatment plant and a water intake of a washing place are alternately present, and therefore various bacteria and organic substances are mixed in water. In addition, there is a drawback that the growth of chloroform-based trihalomethane has been pointed out due to the fact that a large amount of a chlorinating agent for sterilization is introduced.

[0010] Then, once the generation of red water or the generation of rust occurs, the water utility facilities and the like must be replaced as a whole, and the construction and cost required for the replacement are disadvantageously complicated. There was a condition .

[0011] In addition, there is a bottleneck in the occurrence of chemical damage during the chemical charging process.

In order to cope with this, there has been developed a technique for removing dissolved oxygen from water used for irrigation facilities through cavitation action by ultrasonic waves.

However, the technology of the deoxygenation and deaeration apparatus using cavitation developed by this kind has a disadvantage that its effectiveness is low.

That is, in brief, a deoxygenating / deaerator based on the conventional technique is provided with a cavitation generation chamber in the center of one housing, side flow chambers provided on both sides with partition walls, and a cavitation generation chamber. City water from a city water source is supplied from below through a passage through a pump through a supply port by a supply port, and ultrasonic waves are generated by an ultrasonic generator as a cavitation generator provided at a lower portion of the cavitation generation chamber. Cavitation is imparted to city water supplied into the cavitation generation chamber, the lower space of the cavitation generation chamber is highly evacuated to 700 mmHg or the like by a vacuum pump, and deaeration is performed from the upper space. The water to be underflowed from the lower communication hole of the cavitation generation chamber is located above the side flow chamber on both sides. In the space, the electromagnetic valves are alternately switched by a control device to reduce the vacuum to 400 mmHg or the like to assist deoxygenation, and to take out deoxygenated water via a drain pump.

Adjustment and alternate switching of the degree of vacuum with respect to the cavitation generating chambers separated by the partition wall of the housing and the upper space of the side flow chamber are performed by switching the electromagnetic valve by the control device according to a predetermined program. The degassed oxygen was exhausted through the steam separator through the passage.

[0016]

However, the deoxygenation and deaeration apparatus devised in a conventional manner using the above-described cavitation technique has the following disadvantages of poor practicality.

That is, although there is an advantage of allowing the separation of dissolved oxygen by bubbles containing oxygen and the dissolution of chlorine as a bactericide at a predetermined concentration, due to the cavitation action via the ultrasonic generator in the cavitation generating chamber, In order to assist alternate deoxygenation in the side flow chambers on both sides of the cavitation generation chamber, switching of the electromagnetic valve to the upper space must be performed via the control device,
Not only the operation, but also the management control is complicated and the apparatus structure is complicated. Therefore, the initial cost related to the initial production and assembly is, of course, of course.
There is a demerit that maintenance costs are high, and deoxygenation in the side flow chambers on both sides must be performed alternately through solenoid valves.In addition, compared to the cavitation generation chamber, the side flow on both sides Because the degree of vacuum in the chamber is low, it is not preferable to assist deoxidation,
There was a bottleneck that the degree of deoxygenation of the wastewater via the pump did not go as designed.

[0018]

SUMMARY OF THE INVENTION An object of the invention of this application is to solve the problems of the production of deoxygenated water based on the above-mentioned prior art, and has the advantage of deoxygenation and deaeration via cavitation and sterilization. To ensure that a certain amount of chlorine, such as a chemical, is dissolved, the equipment is integrated, the structure is simple and compact , and the operation and control is easy, and the dissolved oxygen as designed can be removed. An object of the present invention is to provide an excellent deoxygenation / degassing device that is easy to use, has low cost, can be easily operated, has good durability, and is useful in the field of utilization of water facilities technology in various industries. .

[0019]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the construction of the invention of the present application, which has the above-mentioned claims and aims at solving the above-mentioned problems, has been developed in order to solve the above-mentioned problems. Dissolved oxygen in the water used by the water use facility to prevent red water generation and rusting due to oxygen dissolved in the water used at the water use facility for industrial use such as a boiler at a commercial water use facility or a factory boiler When removing the cavities, the upper space in one housing is connected to a vacuum exhaust device such as a vacuum pump, and a cavitation generating chamber is provided in the center of the housing, and the cavitation generating device is provided at the bottom and the water supply port is provided. Provided, the supplied water is subjected to cavitation by a mechanical stirrer installed as the cavitation generator to perform a fine bubble generation action. The supply water containing fine air bubbles is raised so that air can be primarily degassed from the space connected to the upper vacuum evacuation device, and most of the oxygen dissolved in the use water is degassed. Therefore, the surface area of the side flow chamber provided through the partition wall of the cavitation generation chamber is reduced by the dispersing mechanism of the dispersing device with the water that has been degassed only of most of the dissolved oxygen that has overflowed from the cavitation generation chamber. Large and fine bubbles are promoted to separate and sprinkle in the form of a raindrop.They are secondarily degassed in the process. Is connected to the same vacuum pumping device as in the upper space of the cavitation generating chamber and is in a predetermined vacuum state, so that assisted dissolved oxygen degassing is performed in the third sense. And so on, furthermore,
From the side flow chambers, a single passage is connected via a pump to a spray device installed in the space above the upper partition wall to spray water from each side flow chamber in the upper space in a circulating manner . The water ejected from the nozzle to cover the entire area of the dispersion device in a fine particle form is surely degassed by dissolved oxygen in the fourth action by the vacuum action and drained to the next use equipment. The water level in the side flow chamber and the like is adjusted to an optimum level by a water level meter, and technical measures are taken to prevent degassing of chlorines.

[0020]

In the above construction, city water or the like supplied into the cavitation generation chamber formed in the center of one housing is subjected to a stir action by a mechanical stirrer provided at a predetermined portion of the cavitation generation chamber to reduce cavitation. The generated fine bubbles are generated, and the dissolved oxygen is primarily degassed by the vacuum state connected to the vacuum exhaust device in the upper space under the cavitation action, and further, the side flow from the cavitation generation chamber to the side portion In the flow-through process of the water flow having fine bubbles generated in an overflow manner to the chamber, the generated fine bubble portion is subdivided by the dispersing mechanism filled with various dispersing instruments, and is secondarily degassed and degassed, The microbubbles that float in the adjacent sideflow chamber by underflow dissolve dissolved oxygen in the upper vacuum space. It is degassed in three ways, and further sprayed from the side flow chamber through another pump from the spray device provided in the upper space to cover the dispersion mechanism, and from the fine-grained bubble portion, Finally, dissolved oxygen is finally degassed, red water and rusting are prevented, and the structure of the deoxygenation degassing device is simple and initial costs, as well as running costs such as maintenance, are reduced. It is inexpensive, does not degas chlorine, has good durability, is easy to manage and control, and does not require extra maintenance.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG.

The embodiment shown in the drawings is an embodiment of deaeration and deaeration of city water of a public water utility such as a domestic water pipe or a water purification tank.

In the embodiment of the embodiment shown in FIG.
Is a deoxygenation degassing device which forms the center of the gist of the invention of this application, in which only one tank-type housing 21 is formed as a whole, and cavitation generation occurs in a central part or a side part thereof. A chamber 21 ′ is provided with a cylindrical partition wall 21 ″ on the outside thereof, and the side flow chamber 21 ″ ″ on the outside thereof is formed in a ring shape.

A mechanical stirrer 23 as a cavitation generator is disposed inside the cavitation chamber 21 '.
The city water is forcibly stirred to generate fine bubbles to cause cavitation.

The cavitation generating chamber 21 '
A ring-shaped gap 17 in the form of a slit is formed below the partition wall 21 '' so that the cavitation generation chamber 21 'and the outside side flow chamber 21''' communicate with each other at the lower part. Room 21 '
A motor M as a driving device of a mechanical stirring device 23 is disposed below the cavitation generation chamber 21 ′ at a lower side of the cavitation generation chamber 21 ′. 1 is opened and connected through a pump 12.

The city water 11 'is city water containing several ppm or more of saturated dissolved oxygen and chlorine as a disinfectant with respect to the use temperature.

The cavitation generation chamber 21 '
The cavitation 16 is generated in the city water 11 ′ supplied into the inside, and the cavitation generation chamber 21 ′ is provided between the cavitation generation chamber 21 ′ and the partition 21 ″ outside the cavitation generation chamber 21 ′. As shown in FIG. 3, a dispersing ring 7 '' for dispersing water containing bubbles overflowing from the inside is interposed as a dispersing piece group of a dispersing mechanism 18 such as a short cylindrical column packing.

From the upper vacuum chamber 5 of the housing 21, a vacuum exhaust passage 6 ′ is configured to exhaust oxygen degassed via a water / water separator 9 by an exhaust pump 8 of a vacuum exhaust device.

At the lower part of the housing 21, a pump 15 is connected to a predetermined water treatment device such as a tap for general water supply or a cooling tower.
Are connected to each other.

Therefore, as clearly shown in this embodiment, no electromagnetic valve or the like is interposed in the vacuum exhaust passage 6 'as in the above-mentioned conventional mode. 'Is a valve for adjusting the degree of vacuum in the upper vacuum chamber 5.

Reference numeral 24 denotes a liquid level gauge of an electrode type or the like for measuring a water level in the housing 21, and an upper terminal box 24 '.
So that the water surface of the side flow chamber 21 '''is always at a lower set level than the dispersion pieces of the dispersing mechanism 18, and the water surface of the side flow chamber 21''' is not emptied. The liquid level gauge of the terminal box 24 'and the solenoid valve 12' are linked so that the supply and drainage can be controlled by turning on / off the solenoid valve 12 'so that the water level can be controlled at a low level.

In the above configuration, the city water tanks 11 to 8
City water containing about 10% oxygen (chlorine content is 10PPM)
′ Via the pump 12 to the cavitation generation chamber 21 ′
When the cavitation 16 occurs, the supplied city water 11 ′ is cavitationally operated by the mechanical stirring device 23. 16
And generate fine bubbles through the housing 21.
Is primarily deoxygenated by a high vacuum of 700 mmHg or the like in the upper space 51 and is exhausted to the outside air via the exhaust pump 8.

Thus, the city water 11 'continuously supplied.
While overflowing from the upper space 51 of the cavitation generation chamber 21 'and increasing the deaeration surface area through the dispersion pieces of the dispersion mechanism 18 interposed in the ring-shaped space with the partition 21''on the outside, The water containing bubbles, which is further lowered in the vertical manner and is further refined in the process, is secondarily degassed, and is supplied from the lower ring-shaped gap 17 into the side flow chamber 21 '''by underflow. The side flow chamber 21 ″ ″ is located in the upper space 51.
Is exposed to the upper vacuum chamber 5 through
Depending on only the dispersing mechanism 18 due to high vacuum such as mmHg,
The highly evacuated space above the side flow chamber 21 ′ ″ while the bubbles that have not been sufficiently deoxygenated from the cavitation generation chamber 21 ′ are dispersed and agitated in smaller bubbles are kept in the side flow chamber 21 ′ ″. At 51, the city water that has been degassed in a primary manner and deoxygenated by the pump 15 is discharged to the next predetermined water use facility.

[0034] In Thus, in the embodiment of the embodiment shown in FIG. 2, to perform deoxidation above embodiment even more effectively
In this embodiment, the cavitation generation chamber 21 ′ is provided from the side flow chamber 21 ′ ″ outside the cavitation generation chamber 21 ′ to the spray nozzle 20 disposed in the upper space via the pump 15 ″ via the circulation passage 19. Sprays city water 11 'containing oxygen bubbles dissolved in city water 11' degassed in
1, the sprayed fine atomized oxygen bubbles are further degassed by a discharge pump 8 through a passage 6 ', and furthermore, degassed almost completely to deoxygenate completely. Is discharged from a pump 15 to a predetermined water use facility. In this embodiment, the dispersing mechanism 18 is used.
By using the spray nozzle 20, reliable deoxygenated water as designed can be obtained.

It should be noted that the embodiments of the invention of this application are not limited to the above-described embodiments. For example, the spray and the dispersing mechanism may be variously arranged such as vertically and doublely and triplely arranged. Can be adopted.

In terms of design change, the cavitation generating chamber 21 'is not always installed at the center of the housing 21, but can be arbitrarily installed at a desired position.

As the cavitation generator, not only a mechanical stirrer but also an ultrasonic generator can be used.

The water supply facilities to be applied can be applied not only to consumer equipment such as water supply and cooling towers and production equipment such as boilers, but also to various water use facilities used for medical equipment and nuclear power plants. It is.

Then, at 20 ° C. and 30 To
rr, graph of dissolved oxygen before spraying at 40 ° C and 90 Torr (a) and sprayed graphs (b), (b)
It is experimentally found that the effect is clear as shown in the graph of FIG. 4 (where the horizontal axis indicates the amount of discharge (l / h) and the vertical axis indicates the dissolved oxygen (mmg / l)).

[0040]

As described above, according to the invention of this application, dissolved oxygen contained in water such as city water used in water facilities used in consumer equipment and industrial facilities is basically deoxygenated as designed. Water can be produced, and the excellent effect of reliably producing deoxygenated degassed water, which has the practicality of preventing generation of red water due to the water used and rusting in various water facilities, is achieved. Is done.

The deoxygenating and degassing apparatus according to the invention of this application has a simple structure and does not require a large number of switching electromagnetic valves and water level controllers. Since the durability of the function maintenance is good, as well as the initial cost such as attachment, excellent effects such as low maintenance cost and running cost and extremely good operation efficiency are exhibited.

Since the structure is simple and the size and the like can be made compact, various facilities such as a large-scale production factory and a research institute, as well as home and small factories and research institutes, can be used. There is also an advantage that there is flexibility such that a small one or a large one can be selectively used.

Thus, a cavitation generating chamber is provided in one tank type housing, a side flow chamber is provided outside the partition via a partition, and a dispersion piece group is filled between the partition and the cavitation generating chamber. By providing such a dispersing mechanism, water such as city water supplied from below to the cavitation generation chamber is caused to form oxygen bubbles through cavitation generation by the cavitation generation device, and the first air is generated in the vacuum chamber in the upper space. Suctioning and degassing, cavitation generated water containing fine bubbles that could not be completely removed is secondarily deoxygenated by communicating in a sideflow manner to the outer sideflow chamber through the dispersing mechanism, And deoxygenation in primary and secondary cavitation by exposing to high vacuum again in the common high vacuum space above In addition a third defined to ensure deoxidation as designed by is exerted an excellent effect that takes place.

Further, the operation of the system is set to an intermittent operation state ,
By adjusting the degree of vacuum in the vacuum chamber in the upper space, the dissolution state of the disinfectant such as chlorine dissolved in city water etc. is allowed to remain above 0.1 ppm of free residual chlorine specified in the Water Supply Law. An excellent effect of being able to be performed is exhibited.

The spray device provided in the vacuum chamber in the upper space from the outer side flow chamber through the circulation passage is firstly degassed, and secondly and thirdly. Since the degassed water can be degassed in the fourth vacuum in the high vacuum space by the spray, there is an effect that the deoxygenated water as designed is reliably obtained, and the state of generation of red water and rust is reduced. An excellent effect of being reliably avoided is achieved.

In addition, degassing of the chlorine-based germicide is suppressed,
The excellent effect that the sanitary condition of city water etc. is also guaranteed is produced.

Thus, an operation system can be used for tap water so as to permit the maintenance of free residual chlorine of 0.1 ppm or more as specified in the Water Supply Law.

The deoxygenating / degassing apparatus of the invention of this application is not only used for degassing oxygen, but also as a new use for volatile components such as carcinogenic substances such as trihalomethane and trichloroethylene, and other harmful substances derived from chlorine. The effect is also exhibited in the removal of.

[Brief description of the drawings]

FIG. 1 is an overall schematic sectional view of an embodiment of the present invention.

FIG. 2 is an overall schematic sectional view of another embodiment.

FIG. 3 is a partial perspective view of a dispersion mechanism.

FIG. 4 is a comparison graph of dissolved oxygen between an example of the invention of this application and a conventional example.

[Explanation of symbols]

Reference Signs List 8 drainage device (exhaust pump) 21 housing 21 'cavitation generation chamber 14' water supply port 21 '''side flow chamber 1' deoxygenation deaerator 18 dispersing mechanism (dispersed packing piece group) 51 upper space 20 sprayer 23 Mechanical stirrer

Claims (5)

(57) [Claims] A cavitation generating chamber is formed in a housing whose upper part is connected to a vacuum exhaust device, a water supply port and a cavitation generating device are provided at a lower portion of the cavitation generating chamber, and a drainage device is provided at a side portion. A deoxygenating degassing apparatus provided with a side flow chamber, wherein a dispersing mechanism is disposed between the cavitation generation chamber and the sideflow chamber. 2. The deoxygenating and deaerator according to claim 1, wherein said cavitation generator is an ultrasonic generator. 3. The deoxygenating and deaerator according to claim 1, wherein said cavitation generator is a mechanical stirring device. 4. A cavitation generating chamber is formed in a housing whose upper part is connected to an evacuation device, and a water supply port and a cavitation generating device are provided at a lower part of the cavitation generating chamber, and a drainage port is provided on a side part. In the deoxygenating deaerator provided with the side flow chamber, a dispersing mechanism is disposed between the cavitation generation chamber and the side flow chamber, and the drainage circulation passage from the side flow chamber is provided as described above. A deoxygenation / deaeration device, which is connected to a spray device provided above a cavitation generation chamber in a housing. 5. The deoxygenating / deaerator according to claim 4, wherein the spray range of the spray nozzle of the spraying device is disposed so as to cover the entire dispersing mechanism.