KR100302478B1 - Apparatus for removing oxygen dissolved in water using activated carbon fiber catalyst - Google Patents

Abstract

PURPOSE: An apparatus for removing dissolved oxygen from water is provided in which the dissolved oxygen is removed by the following processes, a reducing agent is infused into water, the dissolved oxygen concentration of a reactor inlet is measured by a cell and the reducing agent and dissolved oxygen in water are passed through an activated carbon catalyst reactor to remove dissolved oxygen, followed by passing through an ion exchange column. Whereby, the dissolved oxygen in water is effectively removed at room temperature and the apparatus reduces maintenance cost. CONSTITUTION: The apparatus comprises: a reducing agent storage tank(30) and inducing pump(40) for inducing a reducing agent into water supplied from a water tank(10); a flow amount controller(50); a dissolved oxygen concentration measuring device(60) for reactor inlet; a reactor(70) for an activated carbon fiber catalyst; a dissolved oxygen concentration measuring device(80) for reactor outlet; an ion exchange resin column(90); a filtering device(100); and a controller(110) for automatically recording a water flow amount and controlling the amount of the reducing amount. The reactor for an activated carbon fiber catalyst uses activated carbon fiber or a catalyst in which a metal is supported on the activated carbon filter. The metal is one selected from Pt, Au, Ni, W, Co, Mn, Fe, Cu, Rh and Ir or a mixture thereof.

Description

Dissolved oxygen removal device in water by activated carbon fiber catalyst.

The present invention relates to a catalyst for removing dissolved oxygen to prevent corrosion of metal materials by dissolved oxygen in boiler and cooling system water. Specifically, activated carbon fiber (hereinafter abbreviated as ACF) is dissolved in water. It is used for water pretreatment plants in industrial boilers and cooling water systems by utilizing physicochemical properties of very strong oxygen adsorption capacity and wide specific surface area, and dramatically increasing dissolved oxygen removal performance in water when metal is supported on the activated carbon fiber. The present invention relates to an apparatus for removing dissolved oxygen in water by means of an activated carbon fiber catalyst.

Table 1 below shows the concentration of dissolved oxygen in water according to the water temperature, and it can be seen that it contains a considerable amount of dissolved oxygen (8-10 ppm) at room temperature when exposed to the air.

TABLE 1

Dissolved Oxygen Concentration with Water Temperature

The use of such water saturated with dissolved oxygen directly in the boiler causes corrosion of system metals, which not only shortens the life of the device, but also causes rupture accidents and sudden stops.Metal corrosion by dissolved oxygen causes cathodic reactions that cause the reduction of dissolved oxygen. This can be explained by the anodic reaction where the oxidation reaction of and metal occurs.

▣ Corrosion reaction of iron by dissolved oxygen

i) cathodic reaction:

0 ₂ + 4 H ⁺ + 4e → 2 H ₂ O (acid solution)

0_{2 +} 2 H₂O + 4e → 4 OH^-(Neutral, alkaline solution)

ii) anode reaction:

Fe → Fe ⁺² + 2e

^{Fe +2 + 2 OH - → Fe} (OH) 2 ( or FeO nH ₂ O)

4 Fe (OH) ₂ + O ₂ + 2H ₂ O → 4 Fe (OH) ₃ (or Fe ₂ O ₃ nH ₂ O)

2 Fe (OH) ₃ → Fe ₂ O ₃ + H ₂ O (high temperature)

There are three kinds of corrosion products of iron, among which Fe (OH) ₂ is green and adjacent to the metal surface, Fe (OH) ₃ is brown at the outermost side, and Fe ₃ O ₄ .H ₂ O is black. As a color it is formed between the two preceding layers.

Metal corrosion caused by dissolved oxygen increases linearly with dissolved oxygen concentration.In the absence of dissolved oxygen, the corrosion rate of iron is lower than 0.2mpy, but the corrosion rate is more than 100 times when saturated with dissolved oxygen. In addition, when corrosion occurs, not only shortening the life of the equipment but also heat transfer is prevented due to adhesion of the heat transfer surface of the corrosion product, thereby greatly reducing the process thermal efficiency.

Therefore, in order to prevent corrosion of metal materials by dissolved oxygen and to maintain thermal efficiency, the concentration of dissolved oxygen in boiler water should be strictly restricted. The following Table 2 shows examples of dissolved oxygen concentration limits provided by the power plant boiler manufacturer. It can be seen that it is necessary to maintain the dissolved oxygen concentration below 10 ppb in the normal operation clock case.

TABLE 2

Conventionally, dissolved oxygen in boiler water has been removed by mechanical degassing and reducing agent (hydrazine, etc.) injection using dissolved oxygen, but these methods have the following problems in terms of treatment performance and cost.

1. Mechanical degassers

i) vacuum degassing

The most widely used method to remove dissolved oxygen in steam generator water in nuclear power plants is the operating principle, which reduces the partial pressure of gas in the tower by injecting water from the top of the packed column maintained in vacuum. It is a method of removing the non-condensable gas, including two or more stages of the packed tower can improve the oxygen removal efficiency of the device.

At this time, the dissolved oxygen removal efficiency is affected by vacuum degree, packed tower size, inlet water temperature, etc., and the filling material has a large surface area per unit volume and determines the size of the packing tower. There should be no elution of impurities from the packing material used. In order to remove oxygen, nitrogen, and carbon dioxide from the vacuum pump, the vacuum pump must maintain a certain level of the apparatus vacuum by using a steam ejector, but the water treated by the vacuum degassing method contains dissolved oxygen in the range of 30 to 40 ppb. It is difficult to remove it completely, and the dissolved oxygen concentration is increased by the air inflow of the sealing part. Also, a special sealing device is required to maintain the system in a vacuum, and expensive equipment cost and There is a maintenance fee.

ii) Heating Deaerator

Gas solubility in water can be removed according to the Henry's Law in proportion to the partial pressure of the gas in the gas phase, thereby removing the dissolved gas from the aqueous solution, and the solubility of the gas is affected by the temperature. It decreases as it increases. The heating degassing method is used to remove the dissolved gas by heating the feed water in the heating degassing apparatus and mixing it with steam to lower the gas partial pressure.

However, it is possible to lower the dissolved oxygen to less than 7 ppb by the optimum operation of the heating degasser, but there is a limitation that it is not applicable where there is no heat source of steam.

2. Reducing agent (hydrazine) treatment method

One effective way to remove levels of dissolved oxygen is to use a reducing agent such as hydrazine, which is an oxygen removal chemical reaction of hydrazine in water, which produces nitrogen gas and water molecules as reaction by-products that affect metal corrosion. It is widely applied to remove dissolved oxygen because it does not.

N ₂ H ₄ + O ₂ → N ₂ + 2H ₂ O

In this case, the amount of hydrazine per 1 ppm of dissolved oxygen is 1 ppm, but the amount of chemicals used is relatively small, but the reaction proceeds only at a relatively high water temperature (80 ° C. or higher), and thus, dissolved oxygen is difficult to remove at room temperature.

Accordingly, the present invention solves the problems of the conventional dissolved oxygen removal technology and completely eliminates dissolved oxygen in the water of power plants and industrial boilers or cooling systems, thereby minimizing the occurrence of metal corrosion, thereby extending the service life of the equipment and safe operation and maintenance costs. It is an object of the present invention to provide an apparatus for removing dissolved oxygen in water by activated carbon fibers which effectively removes dissolved oxygen in water at room temperature by supporting metal on the activated carbon fiber or the activated carbon fiber in order to reduce energy consumption.

1 is a block diagram of a dissolved oxygen removal device by a metal-supported activated carbon fiber according to an embodiment of the present invention.

2 is a change diagram of dissolved oxygen concentration in treated water passing through a metal-supported activated carbon fiber catalyst according to one embodiment of the present invention.

Figure 3 is a change in dissolved oxygen concentration in the treated water according to the flow rate when passing through the metal-supported activated carbon fiber catalyst according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: water tank 11: water tank valve

20: water pump 21: water pump discharge valve

30: reducing agent tank 40: reducing agent injection pump

41: reducing agent injection pump discharge valve 50: water flow controller

51: water flow sensor 52: water flow control valve

60: dissolved oxygen concentration measuring instrument at the reactor entrance

70: activated carbon fiber catalytic reactor

80: dissolved oxygen concentration meter of reactor outlet 90: ion exchange resin tower

100: filter 110: water quality monitoring / control device

In order to achieve the above object, the dissolved oxygen removing method according to the present invention includes a method for removing dissolved oxygen in a water at room temperature containing a dissolved oxygen in the range of 0 to 9 ppm in a water after pumping the water to a predetermined concentration or less. After injecting a reducing agent with a predetermined drainage equivalent of the dissolved oxygen concentration present, the dissolved oxygen concentration of the reactor is measured by a galvanic or polarographic cell, and the flow rate of the injected water with the reducing agent is adjusted. Performing a catalytic reaction by removing the dissolved oxygen through the activated carbon fiber catalytic reactor and measuring the dissolved oxygen concentration in the treated water from which the dissolved oxygen is removed using galvanic or polarographic, and measuring the dissolved oxygen at the outlet of the reactor. ,

After the catalytic reaction step is carried out by adding an ion exchange step using a mixture of a cation exchange resin and an anion exchange resin to remove impurity ions in the water by the ion exchange resin.

In addition, it is characterized by consisting of a filtration step to remove the turbidity component in the treated water using a micro filter or melbrane filter.

In addition, the method for removing dissolved oxygen by the activated carbon fiber catalyst according to the present invention uses activated carbon fiber as a catalyst which strongly dissociates and adsorbs dissolved oxygen in water, thereby greatly promoting the reaction between the reducing agent and dissolved oxygen even at low temperatures. In order to lower the activation energy of the catalytic reaction includes a catalytic reaction step using a catalyst loaded with metal on the activated carbon fiber.

At this time, the removal reaction of dissolved oxygen by hydrazine on the surface of the activated carbon fiber catalyst or the activated carbon fiber catalyst carrying the metal oxide proceeds as follows.

-ACF or metal oxide surface: O ₂ → 2O- * * :( catalyst active site)

- hydrazine in ^{_{water: N 2 H 4 + 2O -}} → N 2 + 2H 2 O

Supporting metal oxides, such as cobalt and iron nickel, on activated carbon fibers can easily dissociate dissolved oxygen in the molecular state into the oxygen atom in the atomic state, which greatly increases the dissolved oxygen removal rate.

The dissolved oxygen removal reaction by hydrazine, a reducing agent, on the surface of an activated carbon fiber catalyst on which activated metal fibers such as Pt or Pd are supported is carried out as follows.

-Pt or Pd surface: N ₂ H ₄ → N ₂ + 4H- * *: (catalyst active point)

4H- * → 4H ^{+ +} 4e ^-

- ACF Surface: O₂+ 2H₂O + 4e^-→ 4OH^-

- termination ^{reactions: 4H + + 4OH - → 4H} 2 O

Carrying precious metals such as Pt and Pd on activated carbon fibers can easily decompose the hydrazine, a reducing agent, into four hydrogen atoms, which greatly speeds up the removal of dissolved oxygen.

The dissolved oxygen removing apparatus for achieving the dissolved oxygen removing method according to the present invention includes a water storage tank for storing the dissolved oxygen, a water pumping unit for supplying water from the water refining tank, and the water pumping unit. Reducing agent injecting unit for injecting a reducing agent into the water supplied by the reactor, Dissolved oxygen concentration measuring unit for measuring the dissolved oxygen concentration in the water injected with the reducing agent, connected to the water pump and the flow rate of the water A water flow rate control unit for controlling the water, an activated carbon fiber catalyst reaction unit filled with activated carbon fiber or a metal-supported activated carbon fiber catalyst for reacting dissolved oxygen in the water with a reducing agent connected to the flow rate control unit, and the activated carbon Dissolved oxygen concentration at the outlet of the reactor connected to the fiber catalysis reactor and measuring the dissolved oxygen concentration in the treated water passing through the reactor A measurement unit, a filter unit using a micro filter or a membrane filter connected to the activated carbon fiber catalytic reaction unit to remove impurities in the treated water, a measurement value and a water flow rate measurement value of the dissolved oxygen measurement unit at the inlet and outlet of the reactor Water quality monitoring and control unit for controlling the amount of reducing agent injected into the water according to the measured value of the reactor inlet dissolved oxygen meter and the flow rate of the reactor, and cation exchange for removing impurity ions in the water by being connected between the catalytic reaction unit and the filtration unit. Resin and anion exchange resin is characterized in that the installation by adding an ion exchange resin tower filled with a mixture.

The present invention focuses on the fact that the surface area of the activated carbon fiber is very wide and the dissolved oxygen adsorption power is strong. By using the reducing agent in parallel, the dissolved oxygen in the water can be completely removed at room temperature. The performance test of the device confirmed that the dissolved oxygen removal effect was much better than the conventional one.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the apparatus for removing dissolved oxygen by activated carbon fibers according to an exemplary embodiment of the present invention is connected to a water tank 10 for storing water, and connected to the water tank 10 to supply water. Water pump 20 for reducing, the reducing agent storage tank 30 and the injection pump 40 for injecting a reducing agent into the water supplied from the water tank 10, and for controlling the flow rate of the water injected with the reducing agent Dissolved oxygen and reducing agent connected to the flow controller 50, the reactor inlet dissolved oxygen concentration measuring device 60 for measuring the dissolved oxygen concentration of the water pumped by the water pump 20, and the water pump 20 An activated carbon fiber catalyst reactor (70) filled with an activated carbon fiber catalyst for carrying out a catalytic reaction with the reactor, and a reactor outlet dissolved in the outlet of the activated carbon fiber catalyst reactor (70) to measure the dissolved oxygen concentration in the treated water Oxygen concentration It is connected to the measuring device 80, the activated carbon fiber catalytic reactor 70, the ion exchange resin tower 90 for removing impurity ions in the treated water, and the ion exchange resin tower 90 is connected to the Filtration device 100 for removing turbidity components, the measured values of the dissolved oxygen concentration measuring device (60, 80) and the water flow rate of the flow controller 50 is automatically recorded by time and the reducing agent injection pump 40 is controlled to Water quality monitoring and control device 110 for automatically adjusting the amount of reducing agent injected into.

A water tank valve 11 and a water pump discharge valve 21 for controlling the flow of water are installed between the water tank 10 and the water pump 20, and a reducing agent injection connected to the reducing agent tank 30 is provided. Pump 40 is provided with a reducing agent tank valve and reducing agent pump discharge valve 41, the reactor 70 is to produce a reactor to fill the activated carbon fiber catalyst or metal supported activated carbon fiber catalyst in the form of a cartridge. .

In addition, the flow controller 50 is provided with a flow sensor 51 and a flow control valve 52, the water flow rate set by the operator receives a flow signal from the flow sensor 51 to maintain a constant Automatically adjusts the opening degree of the flow control valve 52 and sends a flow signal to the water quality monitoring and control device 110 to automatically record the flow rate data, the dissolved oxygen measuring device (60, 80) is galvanic or polarographic A dissolved oxygen concentration measuring device connected to a sensor of a cell principle is used, and the water quality monitoring and control device 110 includes the dissolved oxygen concentration and the flow controller 50 measured by the dissolved oxygen concentration measuring instruments 60 and 80. Automatically stores the water flow rate measured in the built-in PC by time, and controls the amount of reducing agent injection into the water according to the measured value and the water flow rate of the reactor inlet dissolved oxygen measuring unit 60.

At this time, the reducing agent tank 30 is provided to inject one or a mixture of hydrogen, hydrazine, DEHA, Carbohydrazide, MEKO, Ascorbic acid, Erythorbic acid as a reducing agent.

Referring to the operation of the dissolved oxygen removal device by the activated carbon fiber configured as described above are as follows.

After pumping the water from the water tank 10 using the water pump 20, the reducing agent is injected into the pumped water from the reducing agent tank 30 and the injection pump 40, and the water into which the reducing agent is injected is flow rate. The flow rate is controlled by the controller 50 and introduced into the reactor 70, where the dissolved oxygen in the water is measured by the reactor inlet dissolved oxygen measuring instrument 60 at the reactor inlet before the water is introduced into the reactor 70. After entering the reactor 70, the activated carbon fiber catalytic reactor 70 removes dissolved oxygen in the water by catalyzing the dissolved oxygen in the introduced water and the reducing agent, wherein the dissolved oxygen is removed from the reactor 70. The treated water is discharged out of the reactor 70 and the dissolved oxygen in the treated water is measured by the reactor outlet dissolved oxygen concentration meter 80, and then the treated water is sent to the use exchange resin tower 90 to reduce excess in the treated water. And removing the impurity ions, and sends it to the ion exchange resin column 90, treatment tanks and then be spilled from the process and passed through a filtration device 100 to remove the turbidity in the treated component.

In addition, the measured values of the dissolved oxygen measuring devices (60, 80) and the flow rate of the water flow rate measured by the flow controller 50 at the reactor inlet and outlet to be automatically recorded in the water quality monitoring / controller 110 by time, the reactor inlet dissolved oxygen measuring instrument The reducing agent injection pump 40 is controlled by the water quality monitoring / controller 110 according to the measured value and the water flow rate of 60 so that the reducing agent injection amount of the water is automatically controlled.

In this experiment, a dilute solution (2%) of hydrazine was used as a reducing agent and injected into the reactor water to be about 20 ppm.

The test was carried out under the following conditions.

-Water quality: pH 7.1, Cond 132u s / cm, calcium ion 15.56ppm, magnesium ion 3.15ppm, sodium ion 7.02ppm, potassium ion 1.32ppm, silica 3.51ppm, iron ion 0.004ppm, sulfate ion 19.38ppm, chlorine ion 11.89 ppm, nitrate 5.05ppm

Water temperature: 12.2 ℃

Flow rate: 72, 120, 168, 192 BV / hr

-Type of catalyst: activated carbon fiber catalyst, metal supported activated carbon fiber catalyst

Table 3 below shows the dissolved oxygen removal reaction catalyst properties.

TABLE 3

Dissolved Oxygen Removal Reaction Catalyst Properties

Under the above test conditions, the test results according to this example are as follows.

Example 1

At room temperature, dissolved oxygen was hardly removed and maintained at 9.4 ppm. However, the hydrazine treatment was rapidly reduced when passed through an activated carbon fiber catalytic reactor.

Table 4 shows the measured dissolved oxygen concentrations in the treated water passing through the activated carbon fiber reactor at 9.4ppm in the reactor inlet dissolved oxygen concentration, water temperature 12.2 ℃, N ₂ H ₄ 20ppm, Figure 2 is shown in Table 4 It is shown graphically.

TABLE 4

Dissolved oxygen concentration in treated water passing through activated carbon fiber reactor at 9.4 ppm dissolved reactor concentration, water temperature 12.2 ℃, N ₂ H ₄ 20 ppm

Table 5 below shows the measured dissolved oxygen concentration in the treated water when the activated carbon fiber catalytic reactor passes through the reactor inlet dissolved oxygen concentration of 9.4ppm, water temperature 12.2 ℃, N ₂ H ₄ 20ppm, Figure 3 Table 5 is a graph.

TABLE 5

Determination of dissolved oxygen concentration in treated water at the inlet of the activated carbon fiber catalytic reactor at 9.4ppm dissolved oxygen concentration, 9.4ppm water temperature, 12.2 ℃ and 20ppm N ₂ H ₄ .

As shown, after 60 minutes from the reaction rate 12.2 ° C. to the space velocity 120 BV / hr, the dissolved oxygen concentration in the treated water is maintained at less than 1.0 ppb. However, the treatment performance is excellent, but the space velocity is higher than 192 BV / hr. Increasing the treatment performance decreases, so in the actual process application, the space velocity should be kept below 120 BV / hr and treated water should be used in the process 60 minutes after the initial operation.

(Example 2)

Table 6 below shows the change of dissolved oxygen concentration in water when passed through an activated carbon fiber catalyst reactor using Hydrogen, Diethylhydroxylamine (DEHA), Carbohydrazide, Methyl-ethyl-ketoxime (MEKO), Ascorbic acid, and Erythorbic acid. As a result of the test, in any case, it can be seen that the dissolved oxygen concentration is greatly reduced by passing through the catalytic reactor.

Table 6 shows the changes in dissolved oxygen concentration in water when the activated carbon fiber catalyst reactor was passed using Hydrogen, Diethylhydroxylamine (DEHA), Carbohydrazide, Methyl ethyl-ketoxime (MEKO), Ascorbic acid, and Erythorbic acid as reducing agents. The result is.

TABLE 6

(Example 3)

Metals supported on activated carbon fibers include platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), tungsten (W), cobalt (Co), manganese (Mn), iron (Fe), copper ( One of Cu), ruthenium (Ru), rhodium (Rh), iridium (Ir) or mixtures thereof is used.

Table 7 shows that dissolved oxygen removal performance is greatly increased when using various metals supported on activated carbon fiber.

In other words, when the amount of the catalyst used in the water is small, the conversion rate was almost unchanged by the activated carbon fiber catalyst, but when the metal was supported, the conversion rate was increased to 6.72% (when supporting Pt). .

This is very economically effective even when the charge rate is increased a little, the results according to the present invention can be said to be a breakthrough, in the present embodiment was carried by the Impregnation method so that the metal loading is 1wt.% Relative to the catalyst carrier, After firing in nitrogen stream for 4 hours at 400 ° C, it was used for reaction test. The catalytic reaction test conditions for dissolved oxygen removal were as follows, and the performance of the catalyst in the differential reaction reactor using trace amount of catalyst was evaluated. It was.

-Reaction rate: 20 ℃

-Water flow rate: 1.0L / min

-Catalyst amount: 3 layers (diameter 10mm)

-Reactant concentration: N ₂ H ₄ 28ppm, DO 8.5ppm

TABLE 7

Performance Comparison of Dissolved Oxygen Removal When Supporting Multiple Metals on Activated Carbon Fiber

As a result of this test, the dissolved oxygen removal performance by activated carbon fiber catalyst or metal-supported activated carbon fiber catalyst was found to be excellent even at low temperature. When the device of the present invention is utilized for boiler and cooling system water treatment of power plant, the equipment life is extended. In addition to the improvement of efficiency and efficiency, the operation cost reduction effect is expected to be very high.

According to the present invention, by treating the activated carbon fiber catalyst or the metal-supported activated carbon fiber catalyst and the reducing agent with a very large specific surface area and strong dissolved oxygen adsorption power, the dissolved oxygen in water can be almost completely removed (less than 2 ppb) even at room temperature. It can be applied as a dissolved oxygen removal device in water such as boilers and cooling facilities, and when the device of the present invention is installed and operated on site, it is expected that the effect of extending the life of the facility and reducing the maintenance cost will be very large.

Claims (5)

In the apparatus for removing dissolved oxygen in water at room temperature to prevent corrosion of metal materials by dissolved oxygen in boiler and cooling system water, A water tank 10 for storing water; A water pump 20 connected to the water tank 10 for supplying water; A reducing agent storage tank 30 and an injection pump 40 for injecting a reducing agent into the water supplied from the water tank 10; A flow controller 50 for controlling the flow rate of water into which the reducing agent is injected; A reactor inlet dissolved oxygen concentration measuring device (60) for measuring the dissolved oxygen of the water pumped by the water pump (20); An activated carbon fiber catalyst reactor (70) connected to the water pump (20) and filled with an activated carbon fiber catalyst (cartridge) or a plate type to carry out a catalytic reaction between dissolved oxygen and a reducing agent; A reactor outlet dissolved oxygen concentration measuring device (80) connected to the outlet of the activated carbon fiber catalytic reactor (70) for measuring dissolved oxygen in the treated water; An ion exchange resin tower (90) connected to the activated carbon fiber catalytic reactor (70) for removing impurity ions in the treated water; A filtration device (100) connected to the ion exchange resin tower (90) for removing turbidity components in water; Water quality monitoring to automatically record the measured values of the dissolved oxygen concentration measuring device 60, 80 and the water flow rate of the flow controller 50 by time and control the reducing agent injection pump 40 to automatically adjust the amount of reducing agent injected into the water. And an apparatus for removing dissolved oxygen in water by using an activated carbon fiber catalyst, characterized in that it comprises a control device (110). The method of claim 1, As the reducing agent injected in the activated carbon fiber catalytic reactor 70, activated carbon fiber characterized in that the injection of one or a mixture of hydrogen, hydrazine, Diethylhydroxylamine, Ascorbic acid, Erythorbic acid, Carbohydrazide, Methyl-ethyl-ketoxime Dissolved oxygen removal device in water by a catalyst. The method of claim 1, The activated carbon fiber catalytic reactor 70, An apparatus for removing dissolved oxygen in water using an activated carbon fiber catalyst, characterized by using an activated carbon fiber catalyst supported on a metal supported on activated carbon fibers or activated carbon fibers. The method of claim 3, wherein Metals supported on the activated carbon fibers of the activated carbon fiber catalytic reactor 70 are platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), tungsten (W), cobalt (Co), and manganese. (Mn), iron (Fe), copper (Cu), ruthenium (Ru), rhodium (Rh), iridium (Ir) one or a mixture of these, dissolved oxygen in the water removal apparatus using an activated carbon fiber catalyst . The method of claim 1, The filtration device 100 is dissolved oxygen in the water by the activated carbon fiber catalyst, characterized in that using a micro filter or a membrane filter for removing turbidity components and impurities in the treated water.

Images