KR101024323B1 - Apparatus for gas dissolution and reaction - Google Patents

Abstract

PURPOSE: An apparatus for gas dissolution and reaction is provided to mix raw water such as seawater, freshwater, and waste water with gas such as oxygen or ozone by generating vortex through pressure difference around a nozzle. CONSTITUTION: Raw water flow in a first pipe. A gas generator generates and supplies gas. An injector mixes raw water of the first pipe(100) with gas of the gas generator(200). In a reaction tank(400), the remixing of the mixed raw water with gas is performed. A circulation leading pipe(500) divides the inside of the reaction tank into an internal flow path and an external flow path. A mixing nozzle(600) sprays the gas and raw water of the injector to the internal flow path. A vortex leading plate(700) induces the raw water and the gas flowing according to the external flow path to the internal flow path. A second pipe(800) discharges the mixed raw water.

Description

Gas Dissolution Reaction Unit {APPARATUS FOR GAS DISSOLUTION AND REACTION}

The present invention relates to a gas dissolution reaction apparatus, and more particularly, to a gas dissolution reaction apparatus capable of effectively mixing and dissolving various gases, such as oxygen and ozone, into various raw waters such as seawater, fresh water, and wastewater.

Typically, the reaction of gas (gas) and liquid is dependent on the diffusion by the contact of the gas-liquid interface, and accordingly, various gas dissolution reaction apparatuses for maximizing the contact area of the liquid per unit volume of gas for the expansion of the gas-liquid interface are provided. Developed. The most widely used gas dissolution reaction apparatus is a bubbler or an acidic device, in which an object having a small pore is placed in a liquid so that bubbles are generated so that the gas is mixed into the liquid in a bubble state. Such a bubbler or diffuser has an advantage that it can be easily installed and easy to use, but has a disadvantage in that the gas-liquid contact transfer efficiency is relatively low and thus is limited to a simple system.

Therefore, a gas dissolution reaction apparatus using a venturi tube-type injector or in-line static mixers having various shapes has been developed, and such a device requires a predetermined flow rate compared to the bubbler or diffuser device described above. Furnace can be easily installed in one reactor or piping, and because of the good mixing efficiency by gas-liquid contact has been used a lot industrially.

However, such a conventional gas dissolution reaction apparatus induces mixing by maintaining the reaction with the required gas (gas) for a long time in a separate tank, focusing on mixing the gas into the liquid. Therefore, a considerable time is required for efficient mixing and reaction of gas and liquid, and the reaction tank is very large, and thus there is an inefficient and inefficient economic problem.

The present invention to solve the conventional problems as described above the first pipe inlet raw water; A gas generator for generating and supplying a gas such as oxygen or ozone; An injector connected to the first pipe and the gas generator, respectively, to mix raw water supplied through the first pipe and the gas supplied through the gas generator; A reaction tank provided for remixing raw water and gas mixed in the injector; A circulation induction pipe installed inside the reaction tank to divide the inside of the reaction tank into an inner flow passage and an outer flow passage; It is installed inside the reaction tank in a state connected to the injector, by injecting the gas and raw water supplied from the injector into the inner flow path formed by the circulation induction pipe so that the gas and raw water is continuously circulated and mixed between the inner flow path and the outer flow path. Mixing nozzles; And, it is connected to the reaction tank provides a gas dissolution reaction device comprising a second pipe for discharging the raw water uniformly mixed with the gas to the outside.

The present invention causes the primary mixing and reaction of the raw water and gas by the strong injection of raw water and gas into the reaction tank through the mixing nozzle and the raw water and gas injected into the reaction tank to the circulation induction pipe and the vortex induction plate As a result, the inside of the reaction tank can be continuously circulated to enable uniform mixing of raw water and gas within a short time. In addition, when the mixing nozzle sprays raw water and gas at a strong pressure, a pressure difference is generated around the mixing nozzle, and vortex is generated around the mixing nozzle due to the pressure difference, so that the mixing of the raw water and the gas can be performed quickly.

1 is a view showing the overall structure of the gas dissolution reactor according to the present invention.
2 is a view showing the structure of an injector according to the present invention.
3 is a view showing a structure in which a plurality of mixing nozzles according to the present invention are installed in a reaction tank.

Hereinafter, preferred embodiments of the present invention, in which the above object can be specifically realized, are described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted below.

1 is a view showing the overall structure of the gas dissolution reactor according to the present invention.

Referring to Figure 1, the gas dissolution reaction apparatus according to the present invention is largely the first pipe 100, gas generator 200, injector (injector) 300, reaction tank 400, circulation induction pipe 500 , The mixing nozzle 600, and the second pipe 800.

The first pipe 100 is a pipe into which raw water flows, and when the pressure pump P installed in the first pipe 100 starts to operate, raw water flows into the inside. The raw water flowing into the first pipe 100 is not limited to fresh water taken to provide river water and drinking water, and various kinds of water such as sewage, wastewater, or seawater used in aquaculture farms where the water quality can be improved by ozone treatment. Water can be the target. In addition, the pressurized pump P installed in the first pipe 100 may have various types of pumps such as a centrifugal pump, an axial pump, a reciprocating pump, and a rotary pump.

The gas generator 200 generates a gas such as oxygen, ozone, and the like, and supplies the gas to the injector 300 to be described below. When the gas generator 200 supplies ozone gas, the gas generator 200 generates ozone gas using oxygen as a raw material gas. In this case, although the supply of oxygen as raw material gas is not shown, general portable liquefied oxygen or industrial mobile oxygen is shown. It takes place through a gas cylinder.

The injector 300 is connected to the first pipe 100 and the gas generator 200 described above, respectively, and mixes the raw water supplied through the first pipe 100 and the gas supplied through the gas generator 200. Let's do it.

2 is a view showing the structure of an injector according to the present invention.

Specifically, as shown in FIG. 2, the injector 300 is connected to the first pipe 100 to receive the raw water inlet 310 through which raw water is introduced, and the gas supplied from the gas generator 200. The gas inlet 320 and the outlet of the mixed raw water and the gas is discharged 330, the cross-sectional area is narrowed while going from the raw water inlet 310 toward the outlet 330 is made in the form of venturi tube (venturi tube) is widened again do.

Therefore, the raw water introduced into the injector 300 flows through a narrow cross-sectional area of the injector 300, and the flow rate is increased, and the pressure inside the injector 300 drops, so that the injector 300 enters the injector 300 through the gas inlet 320. The gas is sucked in and mixed with the raw water. The method of mixing and dissolving gas into raw water using the Venturi tube-type injector 300 is called a side stream method. When using a high concentration of ozonated gas, the dissolution rate of the ozonated gas is high and required for dissolution. Since the flow rate is relatively small, it is widely used as a dissolving device for ozone gas in an advanced treatment facility using ozone in a large capacity water purification plant or a sewage treatment plant. The injector 300 is preferably made of a material such as Teflon, Hypalon, and silicon in order to prevent oxidation by seawater and ozone gas.

Meanwhile, referring again to FIG. 1, a bypass pipe 340 including an open / close valve 341 is installed at both ends of the injector 300. Specifically, the bypass pipe 340 is branched from the first pipe 100 is connected to the pipe 350 for guiding the raw water and gas mixed in the injector 300 to the mixing nozzle 600. Therefore, when the bypass pipe 340 is opened by the opening and closing valve 341, the raw water supplied through the first pipe 100 is divided into the bypass pipe 340 and the injector 300, and at this time, the opening and closing valve 341 Flow rate of the raw water flowing into the injector 300 is adjusted according to the opening degree of the bypass pipe 340 by the). As such, when the flow rate of the raw water flowing into the injector 300 is adjusted, the internal pressure of the injector 300 is adjusted together with the flow rate of the raw water passing through the injector 300, and thus, the amount of gas sucked into the injector 300. This can be adjusted.

The reaction tank 400 is a device provided for remixing the raw water and the gas mixed in the injector 300 and is a kind of chamber in which the raw water and the gas injected from the mixing nozzle 600 react while staying for a predetermined time.

The circulation induction pipe 500 is installed inside the reaction tank 400 to partition the inside of the reaction tank 400 into an inner flow passage 410 and an outer flow passage 420. Specifically, the circulation induction pipe 500 is installed inside the reaction tank 400 so as to be spaced apart from the upper and lower surfaces of the reaction tank 400 by a predetermined interval, wherein the inner space of the circulation induction pipe 500 is an internal flow path 410. ) And a space between the outer surface of the circulation induction pipe 500 and the inner surface of the reaction tank 400 forms an outer flow path 420.

The mixing nozzle 600 is installed inside the reaction tank 400 while being connected to the injector 300, and an internal flow path formed by the circulation induction pipe 500 supplies gas and raw water supplied from the injector 300. By spraying to the 410, the gas and raw water are circulated and mixed in the inner flow passage 410 and the outer flow passage 420.

)로 분사되면 원수와 가스는 분사와 동시에 1차적으로 혼합된 후 혼합노즐(600)의 분사압력에 의해 내부 유로(410)를 거쳐 외부 유로(420)로 밀려 들어가게 되며, 이러한 과정이 연속적으로 이루어지면 외부 유로(420)를 따라 흐르던 원수와 가스는 다시 내부 유로(410)로 유입되는 연속적인 순환 유동을 하게 된다. 결국, 혼합노즐(600)에서 분사된 원수와 가스는 반응탱크(400) 내부에서 연속적으로 순환하며 균일하게 혼합되어 가스가 원수에 초미세 버블 형태로 용존된 상태가 된다.In more detail, the raw water and the gas from the mixing nozzle 600 toward the internal flow path 410 at an angle (

When injected into the raw water and the gas is first mixed with the injection at the same time and then pushed into the outer passage 420 through the inner passage 410 by the injection pressure of the mixing nozzle 600, this process is made continuously Raw water and gas that flowed along the outer surface of the ground passage 420 are subjected to continuous circulation flow into the inner passage 410. As a result, the raw water and the gas injected from the mixing nozzle 600 are continuously circulated and uniformly mixed in the reaction tank 400 so that the gas is dissolved in the raw water in the form of ultra fine bubbles.

In addition, when the mixing nozzle 600 injects raw water and gas at a strong pressure, a pressure difference is generated around the mixing nozzle 600. Due to this pressure difference, a vortex occurs around the mixing nozzle 600, Mixing is promoted.

As such, the circulating flow of the raw water and the gas injected from the mixing nozzle 600 and the pressure difference generated around the mixing nozzle 600 are determined by the injection pressure of the mixing nozzle 600, so that the mixing of the raw water and the gas is promoted. It is possible to adjust the diameter and the like of the nozzle 600.

On the other hand, the inner circumferential surface of the reaction tank 400 may be provided with a vortex induction plate 700 extending to the upper side of the circulation induction pipe 500. The vortex flow guide plate 700 extends above the circulating induction pipe 500 in the form of blocking the outer flow path 420 formed by the circulation induction pipe 500, so that the raw water and ozone flowing along the outer flow path 420. The gas is blocked by the vortex guide plate 700 and flows back into the internal flow path 410. As such, when the raw water and the gas flowing along the outer flow path 420 are guided to the inner flow path 410 by the vortex guide plate 700, the circulating flow of the raw water and the gas occurs quickly to promote the mixing of the raw water and the gas.

In addition, it is preferable that at least one hole 510 is formed in the circulation induction pipe 500 so that the raw water and the gas moving along the external flow path 420 are introduced again into the internal flow path 410. The hole 510 formed in the circulating induction pipe 500 rapidly introduces raw water and gas moving along the external flow path 420 into the internal flow path 410 so that the circulating flow of raw water and gas occurs quickly. It serves to promote the mixing of.

3 is a view showing a structure in which a plurality of mixing nozzles according to the present invention are installed in a reaction tank.

Meanwhile, as shown in FIG. 3, a plurality of mixing nozzles 600a and 600b may be installed in the reaction tank 400 according to the amount of raw water to be mixed with gas. In this case, for efficient mixing of raw water and gas, The circulating induction pipes 500a and 500b and the vortex induction plates 700a and 700b having holes 510a and 510b for each mixing nozzle 600a and 600b may be separately installed. Of course, the eddy current guide plate (700a, 700b) is a device for promoting the circulating flow of raw water and gas can be removed according to the size of the reaction tank (400).

Finally, the second pipe 800 is connected to the reaction tank 400 to discharge the raw water uniformly mixed with the gas to the outside. At this time, the raw water discharged to the outside through the second pipe 800 may be oxygen dissolved water mixed with oxygen gas or ozone dissolved water in which ozone is dissolved for cleaning the farm pipe, and ozone in waste water or fresh water. The water may be mixed with water and purified. Therefore, the second pipe 800 may be directly connected to the farm pipe or the water tank according to the purpose of use of the raw water. In this case, the raw water in a gas-dissolved state is directly supplied to a necessary place such as a farm or a water tank through the second pipe 800.

The second pipe 800 is preferably provided with a pressure maintaining valve 810 to maintain the pressure of the reaction tank 400 to a constant value so that the gas is dissolved in the raw water. According to Henry's law, when a gas is dissolved in a liquid, the amount of dissolution is proportional to the pressure of the gas, so that increasing the pressure of the reaction tank 400 dissolves a larger amount of gas in the raw water. Therefore, in order to dissolve gas that is not easily dissolved in water, such as oxygen, in raw water, the oxygen gas is maintained in a fine bubble form in the raw water by maintaining the internal pressure of the reaction tank 400 at a predetermined level or more using the pressure maintaining valve 810. Make sure that it is sufficiently dissolved.

In addition, the second pipe 800 may be provided with a gas-liquid separator 900 for extracting the gas not dissolved in the raw water to the outside. (See FIG. 1) The gas-liquid separator 900 is not dissolved in raw water by centrifugation. As a device for separating undesired gas, when the raw water is rotated, the gas which is not dissolved in the raw water is drawn to the outside of the second pipe 800 by using the principle of gathering at the center of rotation so that unnecessary gas does not remain inside the second pipe 800. And, it also serves to prevent the gas flow into the pressure pump (P) or the like.

 Reference numeral P1 is a pressure gauge installed in the first pipe 100, reference numeral P2 is a pressure gauge installed in the pipe 350 connecting the injector 300 and the mixing nozzle 600, P3 is a second pipe. It is a pressure gauge installed in 800.

The pressure measured by the P1 represents the discharge pressure of the pressure pump P. If the P1 value is higher or lower than the predetermined value, the amount of raw water flowing into the first pipe 100 is greater or less than the predetermined amount. Therefore, by controlling the discharge pressure of the pressure pump (P) can be a predetermined amount of raw water to be introduced into the first pipe (100).

The pressure measured by the P2 represents the pressure of the raw water and the gas supplied to the mixing nozzle 600. When the value of P2 is high or low, the on / off valve 341 of the bypass pipe 340 is opened or closed. The mixing nozzle 600 may be supplied with a predetermined amount of raw water and gas.

The pressure measured by P3 means the pressure of the raw water moving along the second pipe 800, that is, the pressure of the reaction tank 400 connected to the second pipe 800, and thus the pressure regulating valve described above according to the P3 value. It may be determined whether 810 is open. Specifically, when it is determined that the P3 value is lower than the predetermined value and the gas is not sufficiently dissolved in the raw water, the pressure control valve 810 is closed to increase the pressure of the reaction tank 400 connected to the second pipe 800 and the P3 value. If the dissolved concentration of the gas is too high higher than the predetermined value, the pressure control valve 810 is opened to lower the pressure of the reaction tank 400 to the predetermined pressure value.

Such a gas dissolution reaction apparatus according to the present invention by causing a strong injection of raw water and gas into the reaction tank 400 through the mixing nozzle 600 causes the primary mixing and reaction of the raw water and gas and at the same time the reaction tank (400) By allowing the raw water and gas injected into the reaction tank 400 to be continuously circulated by the circulation induction pipe 500 and the vortex induction plate 700, uniform mixing of the raw water and the gas can be performed within a short time.

When the mixing nozzle 600 injects raw water and gas at a strong pressure, a pressure difference occurs around the mixing nozzle 600, and due to the pressure difference, a vortex occurs around the mixing nozzle 600. This can be done quickly.

In addition, since the above-described bypass pipe 340, pressure control valve 810, and various pressure gauges (P1, P2, P3) it is possible to constantly adjust the amount of raw water and gas according to the purpose of use of raw water It is possible to accurately control the concentration of the gas dissolved in the.

The present invention described in detail above is not limited to the above-described range, and those of ordinary skill in the art may easily change or replace the scope of the present invention, as well as equivalents thereof. Also included within the scope of the present invention.

100: first pipe 2000: gas supply device
300: injector 310: raw water inlet
320: gas inlet 330: outlet
341: on-off valve 400: reaction tank
500: circulation induction pipe 510,510a, 510b: hole
600,600a, 600b: Mixed nozzle 700,700a, 700b: Vortex guide plate
800: second pipe 810: pressure regulating valve
900: gas-liquid separator P1, P2, P3: pressure gauge

Claims (6)

A first pipe into which raw water flows;
A gas generator for generating and supplying gas;
An injector connected to the first pipe and the gas generator, respectively, to mix raw water supplied through the first pipe and the gas supplied through the gas generator;
A reaction tank provided for remixing raw water and gas mixed in the injector;
A circulation induction pipe installed inside the reaction tank to divide the inside of the reaction tank into an inner flow passage and an outer flow passage;
It is installed inside the reaction tank in a state connected to the injector, by injecting the gas and raw water supplied from the injector into the inner flow path formed by the circulation induction pipe so that the gas and raw water is continuously circulated and mixed between the inner flow path and the outer flow path. Mixing nozzles;
A vortex induction plate extending from the inner circumferential surface of the reaction tank to an upper side of the circulating induction pipe so that raw water and gas flowing along the outer flow path flow back into the inner flow path;
And a second pipe connected to the reaction tank for discharging the raw water uniformly mixed with the gas to the outside. delete A first pipe into which raw water flows;
A gas generator for generating and supplying gas;
An injector connected to the first pipe and the gas generator, respectively, to mix raw water supplied through the first pipe and the gas supplied through the gas generator;
A reaction tank provided for remixing raw water and gas mixed in the injector;
A circulation induction pipe installed inside the reaction tank to divide the inside of the reaction tank into an inner flow path and an outer flow path, and having at least one hole for allowing the raw water and the gas moving along the outer flow path to flow back into the inner flow path;
It is installed inside the reaction tank in a state connected to the injector, by injecting the gas and raw water supplied from the injector into the inner flow path formed by the circulation induction pipe so that the gas and raw water is continuously circulated and mixed between the inner flow path and the outer flow path. Mixing nozzles; And,
And a second pipe connected to the reaction tank for discharging the raw water uniformly mixed with the gas to the outside. The method according to claim 1 or 3,
The second pipe is a gas dissolution reactor, characterized in that the pressure holding valve for maintaining the pressure of the reaction tank to a constant value so that the gas dissolved in the raw water can be maintained. The method according to claim 1 or 3,
The injector is a gas dissolution reactor, characterized in that made of Teflon (Teflon), Hypalon (Hypalon), or silicon (Silicon) material to prevent oxidation by sea water and ozone gas. The method according to claim 1 or 3,
Gas dissolution reaction device, characterized in that the bypass pipe is provided with an on-off valve at both ends of the injector.

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