JPH01139196A - Ejector structure in water treating device - Google Patents

Abstract

PURPOSE:To easily inject water having a high content of dissolved oxygen from a nozzle by forcing compressed air into the water from an appropriate position of an ejector hose connected to a pump. CONSTITUTION:The ejector hose 1 is connected to the delivery port of the pump 6. A valve 7 is provided to the hose 1 in the vicinity of the delivery port of the pump 6. A compressor 8 is connected to the valve 7, the compressor 8 is operated, hence a trace amt. of compressed air is forced into the water in the hose 1 through the valve 7, and the oxygen is forcibly moved in the hose 1 by the agitating action. As a result, the water having a high content of dissolved oxygen is obtained, and injected into treated water W from the nozzle 3 at the tip of the hose to aerate the treated water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an ejector structure for water treatment equipment, etc., and more specifically, to ejector structures for water treatment equipment, etc. This invention relates to an ejector structure in water treatment equipment, etc., configured to inject pressurized air into the ejector hose, forcibly move oxygen inside the ejector hose, and eject water with a large amount of dissolved oxygen from an appropriate nozzle. .

[Prior art and its problems] It is well known that in recent years, the deterioration of water quality, whether seawater or freshwater, has become remarkable due to stagnation of water due to landfills, lack of dissolved oxygen, deposition of harmful sludge, etc. be. Such water treatment methods can be roughly divided into treatment of domestic water, tap water, industrial water, agricultural water, etc. for use or during use, and treatment of wastewater after use. During these treatments, it is often necessary to have a stirring action, an aeration action, or both. In addition, it is necessary to compact the generated sludge, prevent it from adhering, and peel and move the sludge.
There are also aeration-related treatments such as biological treatment, which is the mainstay of wastewater treatment (recently, it is also used for pre-treatment of tap water).

As a water treatment method, the applicant places an ejector made of an appropriate elastic tube with a nozzle at its tip along an underwater action area, and raises it at right angles from approximately the center of the action area. The elastic tube base of the ejector is fixed outside the upper region, and the lower portion is held so that the tube can be twisted freely, and the elastic tube that forms the ejector is generated by the reaction force of air or water jetted from the nozzle. The water is made to undergo complex movements such as waviness, twisting, bending, and reversal, and this movement causes the nozzle to move in a substantially sliding state over a planar action area, thereby stirring and aerating the same area. He invented a treatment device and filed an application, which has achieved revolutionary results, but most of the water treatment is biological treatment (activated sludge method and its modifications), and of course oxygen supplementation is essential for purification through biological metabolism. The method is by aeration. Aeration has traditionally been based on the theory and method of oxygen transfer from air bubbles into water, but normal aeration equipment uses compressed air generated by a compressor, blower, etc., to pass through a porous diffuser plate, a diffuser cylinder, Alternatively, aeration methods in which air is forcibly blown into the water through nozzles, jets, pipes with small holes, etc. are mainly adopted, but in the most commonly used aeration methods, oxygen contained in the air at a depth of 4 to 5 meters is used. 20%
Only about 5% of this moves. In order to solve these problems, deep aeration has recently been adopted, and it is said that about 40% of oxygen is transferred into the water in a 50m deep aeration tank, but deep aeration equipment Installation requires a great deal of expense, and powerful compressors, blowers, etc. are required to forcibly blow pressurized air. Therefore, operating costs such as electricity were also large.

[Means for solving the problem] In view of the problem, the present invention has developed a filtrate treatment device that not only can transfer super oxygen but also is inexpensive in terms of installation and operation costs. Pressurized air is injected from an appropriate place in an ejector hose connected to a pump, and a large amount of water containing dissolved oxygen, which has been forcibly moved inside the hose, is ejected from an appropriate nozzle. It exhibits an ejector structure in a processing device, etc., and as an embodiment, the ejector hose is made of an elastic hose, etc., and the ejector hose is undulated, twisted, bent, etc. by the reaction force of water jetted from an appropriate nozzle, etc.
A complex movement such as reversal is applied, and this movement mainly causes the nozzle to move in a substantially sliding state in a planar action area, stirring,
The nozzle body is configured to have an aeration effect, and furthermore, a scattering tube with a diameter larger than the nozzle of the nozzle body and an appropriate length is fixed to the tip, and the water spouted from the nozzle body is configured to scatter within the scattering tube. The jet nozzle is connected to an ejector hose, and one end of the jet nozzle is connected to the ejector hose, and the other end of the air hose is connected to the peripheral wall of the scattering cylinder, which is fixed to the nozzle body, and is connected to an appropriate blower. A jet nozzle is connected to an ejector hose, which is configured to draw in outside air or send air into the scattering tube through an air hose by the suction effect of filtrate spouted from the nozzle body, and further, in the scattering tube. It is configured to suck in outside air or send air into the scattering cylinder through an air hose, and the peripheral wall is provided with appropriate water suction holes that penetrate inside, so that the water ejected from the nozzle body has a suction effect. The present invention is intended to provide an ejector structure in a water treatment device or the like in which a jet nozzle configured to absorb external water into a scattering cylinder through the water absorption hole is connected to the ejector hose.

[Example] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

(a) Figure 1 shows a water treatment device using a pressurized air injection type water ejector using an elastic tube, which is placed in any liquid (in this example, water) W such as water or a chemical solution. The ejector hose l is a pipe capable of pumping a single fluid such as gas or liquid (water in this embodiment), and is made of a material that can undergo elastic deformation such as waviness, twisting, bending, and inversion. The operating portion 2 of the ejector hose 1 is positioned along the planar action area of the water W, and has an appropriate nozzle 3 at its tip for ejecting fluid in the axial direction. Ejector hose 1
The base side of the is curved upward in a right angle direction from the center of the action area, but a fixing part 4 is provided outside the upper area, and at least the fixing part 4 or a part further away from the fixing part 4 is provided with a fixing part 4. It is connected to a pipe extending from a fluid pump such as a pump or a compressor (pump 6 in this embodiment). A holding part 5 is provided below the fixed part 4, and the holding part 5 is configured to hold the ejector hose 1 so that it can be freely twisted.

The operating part 2 of the ejector hose l located in the planar action area in the water W has a nozzle 3 disposed at its tip.
The nozzle 3 at the tip is configured to move in a substantially sliding state in a planar action area mainly due to the reaction force of the fluid ejected in the axial direction. A valve 7 is provided near the discharge port of the pump 6 of the ejector hose 1 extending from the pump 6 (or a pipe connecting the ejector hose 1 and the pump 6), and a separately provided compressor 8 etc. to ejector hose 1.
By pressurizing a small amount of pressurized air into the water in the ejector hose 1 and creating an agitation effect, oxygen is forcibly transferred within the ejector hose 1 from the discharge port to the nozzle 3 at the tip. As a result, water with a large amount of dissolved oxygen should be spouted into the water.

In this embodiment, an elastic ejector hose 1
Although pressurized air is configured to be injected into the ejector with a fixed pipe, it is also possible to inject pressurized air into an ejector with a fixed pipe. Press-fitting is also possible, and the invention is not limited to this embodiment.

(b) FIG. 2 shows the structure of a jet nozzle. At the tip of the jet nozzle 15 which employs a scattering radiation method, a scattering tube IO whose base is fixed to the nozzle body 3 side is attached. The scattering tube lO has an appropriate length, its body diameter is appropriately larger than the nozzle port of the nozzle body 3, and one end of the air hose 12 is opened to the outside air, and the other end of the air hose 12 is connected to communicate with the inside of the nozzle. Air is sucked into the scattering tube IO by the suction effect of the pressurized water flow ejected from 3, and the large-diameter scattering tube IO
Oxygen is dispersed radially within the water with an increased surface area, and water with a large amount of dissolved oxygen is ejected into the water by a jet effect. Depending on the water depth of the aquarium, etc., the air hose 12
One end of the tube is connected to a blower, and air is introduced into the scattering tube lO.

In addition, an appropriate water absorption hole 1 penetrated inside the peripheral wall of the scattering tube lO.
4, and is configured to absorb external water into the scattering cylinder IO through the water suction hole 14 by the suction effect of water ejected from the nozzle body 3, but this is the same as the one provided with the air hose 12. It may be used in combination with, or may be used alone, and it depends on the application whether air intake and water absorption are used at the same time or each is used individually. Although not shown in the drawings, in the jet nozzle 15 of this embodiment, in order to disturb the jet flow from the nozzle body 3 and increase the scattering effect, a fine spiral body is fitted at the tip of the nozzle hole, and furthermore, a fine spiral body is fitted at the tip of the nozzle hole. A plurality of thin grooves are provided at the tip. Scattering tube 10 forming the main part of the jet nozzle 15
is constructed for the purpose of increasing the suction effect of outside air, etc., and further increasing the jetting force.

Effects of the Invention 1 As described above, the present invention injects pressurized air into the ejector hose 1 etc. connected to the pump 6 from appropriate locations, and
The ejector structure in a water treatment device or the like is configured to eject water with a large amount of dissolved oxygen, which has been forcibly moved inside the hose, from an appropriate nozzle 3. The reaction force of water ejected from a suitable nozzle 3 causes the ejector hose 1 to undergo complex motions such as waviness, twisting, bending, and reversal. It operates almost in a sliding state,
It is configured to perform stirring, aeration, etc., and furthermore, a scattering tube 10 having a diameter larger than the spout of the nozzle body 3 and an appropriate length is fixed to the tip, and the water spouted from the nozzle body 3 is directed into the scattering tube. A jet nozzle 15 configured to cause the ejector to scatter at 10 is connected to the ejector hose 1,
Furthermore, on the peripheral wall of the scattering tube 10 fixed to the nozzle body 3,
One end of the air hose 12 is opened to the outside air, or the other end of the air hose 12 is connected to an appropriate blower, and the water ejected from the nozzle body 3 is sucked through the air hose 12 to the scattering cylinder 1.
A jet nozzle 15 is connected to the ejector hose 1, and the jet nozzle 15 configured to suck in or send outside air into the scattering tube 10 is further connected to the ejector hose 1. In addition to being configured to inhale or inject air, the peripheral wall is provided with appropriate water suction holes 14 penetrating the interior thereof, and the water ejected from the nozzle body 3 is sucked through the water suction holes 14 to cause the scattering tube I to flow through the water suction hole 14.
Since the ejector structure in water treatment equipment, etc. is formed by connecting the jet nozzle 15 configured to absorb external water into the air bubble generator to the ejector hose 1, the conventional aeration method uses water ejected from the micro holes of the air bubble generator. In contrast, the present invention forcibly moves oxygen within the ejector hose 1, resulting in a large amount of dissolved oxygen. This is the generation of bubbles by the scattered radiation of the water jet, and the contact effect of the bubbles is not only due to the rise in the water, but also the movement of oxygen by the injection mechanism of water and bubbles, and as shown in the embodiment, the nozzle 3 at the tip The reaction force of the water jetted out causes the ejector hose l to undergo complex movements such as waviness, twisting, bending, and reversal, and this movement mainly causes the nozzle 3 to automatically move into a substantially sliding state in a planar action area. , the effect can be significantly improved if it is configured to perform stirring, aeration, etc. in the same area.

In order to further enhance the effect of the pressurized air injection method of the present invention, in the embodiment, a jet nozzle 15 provided with a scattering tube IO at the tip of the nozzle 3 is used, or the water spouted from the nozzle 3 is simply placed inside the scattering tube 10. Splashing alone tends to cause pressure loss due to the gap at the tube outlet, but when a large amount of air (or water in some cases) is sucked into or fed into the scattering tube IO, the inside of the scattering tube IO expands and the tube collapses. If the jet is ejected all at once at the exit, the jet energy at the entire exit of the tube will be enormous.

This kind of jet energy is the same in air as it is in water, but its effectiveness is limited by the fact that if one end (air intake) of the air hose 12 is blocked, the water ejected inside the spray tube IO will be extremely reduced. This can be proven from the fact that the jet from the scattering tube 10 is extremely weak.

In the case of aeration, even if only biological treatment is used,
There are a number of necessary factors, in addition to oxygen transfer and power efficiency, the economics of equipment construction, whether biological sludge production is active,
It is also important to check whether the sludge is in an appropriate state due to biological effects at all times. The present invention uses a jet action, and is not only compact with a nozzle-based structure, but also has a small volume only for the pump part, especially when using a pressurized air injection method. There is a change. This makes the device economical and allows easy installation of improvements to existing devices. For example, in the case of deep aeration, it is said that approximately 40% of oxygen is transferred into the water in a 50 m deep aeration tank, but as mentioned above, deep aeration equipment requires a great deal of expense to install and requires forced air pressure. Powerful compressors, blowers, etc. were required to blow oxygen into the water, and operating costs such as electricity were also high. However, the pressurized air injection method of the device of the present invention eliminates the need for oxygen in conventional 50m deep aeration tanks. In order to obtain the same effect as the movement, it is sufficient to pressurize the corresponding pressurized air into the ejector hose 1, and the water depth is 50 to 6.
The power efficiency possible with a 0m deep aeration tank is extremely easy to achieve.

In order to see the power efficiency of the present invention, it is sufficient to compare it with the oxygen transfer efficiency of ordinary aeration methods, but when looking at the performance of ordinary "aeration equipment" (aeration pipe type) according to the sewerage test method, the overall oxygen transfer capacity is The coefficient (KLQ) is the ratio of the atmospheric pressure equivalent supply air amount (QO) per unit water tank volume (V) (QO/V)
The optimal value is KLa/ (QO/V), which is made dimensionless by dividing by However, while the normal aeration method uses air, that is, the "air flow rate", the present invention combines the "water flow rate" of the pump and the "air flow rate" of the compressor, and the following Experimental results are expressed using this value for convenience.

The types of ejectors used in this experiment were: A: one configured to stir by the combined movement of the ejector hose, using a combination of pressurized air injection from an ejector hose, etc., and outside air intake from a jet nozzle.

B: A device configured to only inject pressurized air from an ejector hose, etc.

It is configured so that outside air is sucked in through the C-niture nozzle and stirred by the combined movement of the ejector hose.

D: A combination of pressurized air injection from an ejector hose, etc., and outside air intake from a jet nozzle, without stirring.

Experimental method In the table above, the transfer efficiency is a comparison between the oxygen transfer efficiency of the normal aeration method and the oxygen transfer efficiency of the present invention.When looking at this in terms of power efficiency, in the present invention, the In both cases, those with an output of 5 to 7 atm are used, whereas in the normal method, the output is 0.5 atm.
~0.6 atm is sufficient, so it depends on the equipment used, but if we simply assume that the power cost for the same amount is four times as much when using a pump and compressor together, then A, B in the table above,
C and D values are 5.3 times, 5.3 times, 4.3 times and 3.8
This will be doubled. These results also show that if the method of injecting pressurized air into the ejector hose 1 in the device of the present invention is used, the oxygen transfer efficiency will be 2.
It is clear that an extremely high efficiency of 5.3 times can be obtained when looking at the power efficiency, and although the effect is not directly expressed, it is greatly improved by adding the stirring effect of the elastic ejector hose. This is a simple device with a truly remarkable effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a water treatment apparatus employing an embodiment of the present invention. FIG. 2 is an enlarged partially sectional side view for explaining the main parts. 1...Ejector hose 3...Nozzle IO...Scatter tube 12...Air hose 14...Water absorption hole 15...Jet nozzle patent applicant Horizontal 1) - Autumn Figure 1 Figure 2

Claims (5)

[Claims] (1) Composed so that pressurized air is injected into the ejector hose, etc. connected to the pump at an appropriate location, and water containing a large amount of dissolved oxygen, which is forcibly moved with oxygen, is ejected from an appropriate nozzle. Ejector structure in water treatment equipment, etc. (2) The ejector hose is made of an elastic hose, etc., and the ejector hose is subjected to complex movements such as waviness, twisting, bending, and reversal due to the reaction force of water ejected from an appropriate nozzle, and this movement mainly causes the nozzle to 2. An ejector structure for a water treatment device or the like according to claim 1, wherein the ejector structure is configured such that the ejector operates in a substantially sliding state in a planar action area to perform stirring, aeration, etc. (3) A splatter tube with a larger diameter and appropriate length than the spout of the nozzle body is fixed to the tip, and a jet nozzle configured to scatter water ejected from the nozzle body in the splatter tube is connected to the ejector hose. An ejector structure in a water treatment device or the like according to claims 1 and 2. , (4) The peripheral wall of the scattering cylinder fixed to the nozzle body is connected to an air hose with one end open to the outside air or connected to an appropriate blower, so that air can be aired by the suction effect of the water jetted from the nozzle body. An ejector in a water treatment device, etc. according to Claims 1 and 2, comprising a jet nozzle configured to suck outside air or send air into a scattering tube through a hose, and connected to an ejector hose. structure. (5) The scattering tube is configured to suck outside air or introduce air into the scattering tube via an air hose, and the peripheral wall is provided with an appropriate water absorption hole penetrating the inside,
Claims 1 and 2 include a jet nozzle connected to the ejector hose and configured to absorb external water into the scattering cylinder through the water absorption hole by the suction effect of water ejected from the nozzle body. ejector structure in water treatment equipment, etc.