KR20110044582A - Generator and process for aqueous solution of chlorine dioxide - Google Patents

Abstract

PURPOSE: A production apparatus of a chlorine dioxide water solution, and a producing method thereof are provided to control the supplying amount of raw materials using a solenoid valve instead of a booster pump. CONSTITUTION: A production apparatus of a chlorine dioxide water solution includes a mixing tank(100), a reaction tank(200), a first raw material supplying unit(400), a second raw material supplying unit(500), a third raw material supplying unit(600), a diluted solution feed unit(700), a solenoid valve, and an air pressure pump unit(800). The mixing tank includes first and second inlets, and a first outlet. The first raw material supplying unit supplies chlorite by being connected to the first inlet. The second raw material supplying unit supplies hypochlorite.

Description

Chlorine Dioxide Aqueous Solution Manufacturing Device and Green Manufacturing Method of Disinfection By-Products That Do Not Generate Disinfection By-products such as THMs and Methods for the Preparation {GENERATOR AND PROCESS

The present invention relates to an apparatus for producing a chlorine dioxide aqueous solution and a method for manufacturing the same, and more particularly, to an apparatus for producing a chlorine dioxide aqueous solution and a method for producing the chlorine dioxide aqueous solution having excellent sterilizing power in a large capacity as well as a small capacity. .

Chlorine dioxide has superior disinfection, bleaching, discoloring and deodorizing effects due to its strong oxidizing power than other chlorine disinfectants. In addition, it does not produce carcinogenic organic halogen compounds such as trihalomethanes (THMs), halo acet nitriles (HANs), and haloacetec acids (HAAs), and reacts with other organic substances present in water to form organic chlorine compounds. Since it does not produce a compound, it is widely used for sterilization and deodorant of tap water and sewage water in water purification plants. In addition, since it is rapidly decomposed by sunlight or temperature, there is no residue, which is also known as an environmentally friendly disinfectant, and its interest has recently increased.

Where dozens of tons of chlorine dioxide is required per day for bleaching and discoloring pulp and fibers, sodium chlorate (NaClO ₃ ) prepared by salt-free high temperature electrolysis of salt and gaseous sulfite, hydrochloric acid, methyl Chlorine dioxide (ClO ₂ ) was prepared using alcohol, hydrogen peroxide formarin, and the like. The reaction scheme is as shown in the following formula (1) and (2).

[Formula 1]

2NaClO ₃ + H ₂ SO ₃ ¡Æ 2ClO ₂ + Na ₂ SO ₄ + H ₂ O

[Formula 2]

2NaClO ₃ + 4HCl → 2ClO ₂ + 2NaCl + 2H ₂ O

Since the large-capacity chlorine dioxide production method is a large industry requiring large facilities, devices, and facilities such as salt refining facilities, salt electrolysis facilities, and sulfur dioxide generation facilities, it cannot be used where smaller amounts of chlorine dioxide are required. .

Therefore, in the place where dozens to hundreds of Kg of chlorine dioxide is required per day, the ideal chlorine was prepared by using sodium chlorite as a raw material with a relatively low facility and equipment cost. In this case, chlorine, hydrochloric acid, sodium hypochlorite or the like was used as the oxidizing agent.

In the case of preparing chlorine dioxide using existing sodium chlorite and chlorine, the following formula (3) is used.

(3)

2NaClO ₂ + Cl ₂ → 2ClO ₂ + 2NaCl

However, the method for producing chlorine dioxide according to Chemical Formula 3 is very dangerous because it must handle toxic high pressure chlorine gas, and safety facilities and experts must be arranged in case of chlorine leakage. There was a difficult problem to manufacture.

In addition, another conventional chlorine dioxide production method uses sodium chlorite and hydrochloric acid or sulfuric acid as follows.

[Formula 4]

5NaClO ₂ + H ₂ SO ₄ → 4ClO ₂ + 2Na ₂ SO ₄ + NaCl + 2H ₂ O

[Chemical Formula 5]

5NaClO ₂ + 4HCl → 4ClO ₂ + 5NaCl + 2H ₂ O

On the other hand, the chlorite and the inorganic acid hydrochloric acid or sulfuric acid is a chlorite is rapidly disproportionate decomposition reaction at a certain concentration or more, hypochlorous acid (HClO) and chloric acid (HClO ₃ ) is produced (see Formula 6).

[Formula 6]

2NaClO ₂ + 2HCl → HClO ₃ + HClO + 2NaCl

However, it is very difficult to find out the reaction conditions under which the reaction is well controlled, and it is difficult to fully progress the reaction, and thus, it is difficult to obtain a high purity high yield chlorine dioxide aqueous solution.

The present invention includes a mixing tank in which a raw material is mixed, a first inlet and a second inlet through which the raw material is injected, and a first outlet through which the mixed raw material is discharged; A reaction tank having a third inlet connected to the first outlet, and a second outlet through which the chlorine dioxide aqueous solution generated by the reaction of the mixed raw material is discharged; A first raw material supply unit connected to the first inlet to supply chlorite; A second raw material supply unit connected to the first inlet and supplying hypochlorite; A third raw material supply unit connected to the second inlet to supply sulfuric acid or hydrochloric acid; A dilution water supply unit connected to the first inlet to supply dilution water; A solenoid valve positioned between the first raw material supply unit and the second raw material supply unit and the first inlet, respectively, and positioned between the third raw material supply unit and the second inlet to control the amount of raw material supply; It is connected to the first raw material supply unit, the second raw material supply unit and the third raw material supply unit provides an apparatus for producing a chlorine dioxide aqueous solution comprising an air pressure pump to increase the pressure of the raw material supply.

Here, the mixing tank may further include beads for stirring the raw materials injected into the first inlet and the second inlet.

Here, the beads are characterized in that having a size of 1 to 20mm.

In addition, the manufacturing apparatus may further include a storage unit connected to the second outlet of the reactor to store the generated chlorine dioxide aqueous solution.

Wherein the chlorite is sodium chlorite and the hypochlorite is sodium hypochlorite.

In addition, the present invention comprises the steps of pressurizing the pressure of the first raw material supply unit for supplying chlorite, the second raw material supply unit for supplying hypochlorite, and the third raw material supply unit for supplying sulfuric acid or hydrochloric acid by an air pressure pump; Controlling a solenoid valve to supply raw materials to the mixing tank from the first raw material supply unit and the second raw material supply unit; Supplying dilution water from the dilution water supply unit to the mixing tank; Controlling a solenoid valve to supply raw materials from the third raw material supply unit to a mixing tank; It provides a method for producing a chlorine dioxide aqueous solution comprising the step of moving the raw material mixed in the mixing tank to the reaction tank to produce a chlorine dioxide aqueous solution.

Here, the raw materials supplied to the mixing tank may further include the step of stirring by the beads contained in the mixing tank.

Here, the beads are characterized in that having a size of 1 to 20mm.

In addition, the manufacturing method may further comprise the step of storing the aqueous solution of chlorine dioxide generated in the reactor in the storage.

Here, the chlorite is sodium chlorite, the hypochlorite is characterized in that sodium hypochlorite.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

1 is a structural block diagram of an apparatus for producing a chlorine dioxide aqueous solution of the present invention.

The manufacturing apparatus of the chlorine dioxide aqueous solution of the present invention is a mixing tank 100, the reaction tank 200, the storage unit 300, the first raw material supply unit 400, the second raw material supply unit 500, the third raw material supply unit 600 The dilution water supply unit 700 and the air pressure pump 800 are included.

The mixing tank 100 is where the raw materials are mixed, and the first inlet 110 and the second inlet 120 through which the raw material is injected, and the first outlet 130 through which the mixed raw material is discharged are formed.

The first inlet 110 has the first raw material supply unit 400, the second raw material supply unit 500, and the dilution water supply unit 700 is connected by a connecting pipe or a connection hose, from the first raw material supply unit Chlorate, hypochlorite from the second raw material supply part, and dilution water from the dilution water supply part are supplied to the mixing tank 100 through the first inlet 110. The position of the first inlet 110 may be formed on the upper side or side of the mixing tank 100, preferably is formed on the upper side of the mixing tank.

The second inlet 120 is the third raw material supply unit 500 is connected to the connecting tube or connecting hose, sulfuric acid or hydrochloric acid from the third raw material supply unit through the second inlet 120 and the mixing tank ( 100). The position of the second inlet 120 may be formed on the upper or side of the mixing tank 100, preferably formed on the side of the mixing tank, more preferably the middle / lower side of the mixing tank side It is located in

The first outlet 130 is a place where the raw material mixed with the raw material supplied from the first raw material supply unit, the second raw material supply unit and the third raw material supply unit and the dilution water supplied from the dilution water supply unit is discharged to the reaction tank 200. The first outlet 130 is connected to the reaction tank 200 by a connection pipe or a connection lake. Here, the first outlet 130 may be provided on the side or lower portion of the mixing tank 100, preferably is provided in the lower portion of the mixing tank.

In addition, the mixing tank 100 of the present invention may include a bead, the bead helps to mix by stirring the raw materials injected into the mixing tank. The beads are 1 to 20mm in size, preferably 1 to 10mm in size, more preferably 5 to 10mm in size. The material of the beads may be any material that is not corroded by the raw material, and is preferably a glass material.

The first raw material supply unit 400 is a supply unit for supplying chlorite to the mixing tank 100, and is connected to the first inlet of the mixing tank by a connection pipe or a connection hose. The connection pipe or the connection hose is preferably provided deep to the lower portion of the first raw material supply.

Here, the chlorite is preferably sodium chlorite.

The second raw material supply unit 500 is a supply unit for supplying hypochlorite to the mixing tank 100, and is connected to the first inlet of the mixing tank by a connection pipe or a connection hose.

The connection pipe or the connection hose is preferably provided deep to the lower portion of the second raw material supply.

 The hypochlorite is preferably sodium hypochlorite.

The third raw material supply unit 600 is a supply unit for supplying any one of hydrochloric acid and sulfuric acid to the mixing tank 100, is connected to the second inlet of the mixing tank by a connection pipe or a connection hose.

The connection pipe or the connection hose is preferably provided deep to the lower portion of the third raw material supply.

Here, sulfuric acid is preferable for the said raw material.

The apparatus for preparing an aqueous chlorine dioxide solution of the present invention prepares chlorine dioxide using the following Chemical Formulas 7 and 8.

[Formula 7]

2NaClO ₂ + NaClO + 2HCl → 2ClO ₂ + 3NaCl + H ₂ O

[Formula 8]

2NaClO ₂ + NaClO + H ₂ SO ₄ → 2ClO ₂ + Na ₂ SO ₄ + NaCl + H ₂ O

Chlorine dioxide producing apparatus of the present invention using the above formula (7) or 8 ClO ₂ by properly controlling the ratio of reactants and concentration, a rapid and uniform mixing of the reactants, concentrations, etc. of the appropriate acid ^{_{-, ClO 3 -, Cl 2}} , By ^- products such as ClO-, Cl ^- can be minimized. In addition, the chlorine dioxide production apparatus of the present invention can easily and safely produce a chlorine dioxide aqueous solution from small to large capacity.

In addition, the apparatus for producing a chlorine dioxide aqueous solution of the present invention includes a solenoid valve (410, 510, 610).

Conventionally, a booster pump was used as a means of supplying a raw material for producing chlorine dioxide. Using the pump, a high pressure of 3 to 6 atmospheres of water was passed through an ejector to generate a reduced pressure. Raw materials were supplied to the inlet of the ejector in a form in which the required amount was sucked through the flowmeter. However, when the high pressure water and the raw material liquid inside the ejector are rapidly injected, noise and vibration are generated by the collision between the liquid and the liquid, which may cause problems in the material of the ejector overall system. In addition, it was possible to produce a low concentration of chlorine dioxide solution by the above method, but it was difficult to obtain a small amount of aqueous solution of chlorine dioxide because the amount of the injection water is too large.

On the other hand, another conventional technique is a method of supplying a raw material using a metering pump. However, when using a high concentration of the reaction raw material in the production of a small amount of chlorine dioxide water having a low concentration it was not possible to produce a small amount of chlorine dioxide water having a low concentration. If a low concentration of raw material is used, a large amount of raw material tank is required, which is uneconomical in place. In addition, generally used metering pumps have a small discharge amount of 4 to 5 ml / min, which is difficult to control the amount of fine raw material supply, and a metering pump having a discharge amount of 1 ml / min or less is very expensive and therefore uneconomical.

Therefore, in the present invention, solenoid valves other than the booster pump and the metering pump can be used to control the supply amount of raw materials in an economical manner.

The solenoid valve is located between the first raw material supply part and the first inlet (410), located between the second raw material supply part and the first inlet (510), and is located between the third raw material supply part and the second inlet ( 610).

In another aspect, the present invention further includes a control unit 900 for controlling the opening and closing times of the solenoid valves (410, 510, 610) to control the amount of raw material supplied from the first raw material supply unit, the second raw material supply unit and the third raw material supply unit. can do. The control unit 900 is an electronic control device with a built-in microprocessor. The control unit 900 may be mounted on a printed circuit board (PCB) and control whether the components are opened or closed according to respective conditions.

A solenoid valve is a combination of two basic components that make up a valve body that includes a solenoid (electromagnet) with a magnetic core and one or more orifices. The flow of fluid through the orifice is controlled by closing or opening by the movement of the core when passing through the solenoid or when there is no current. In direct acting valves, when the solenoid is energized, the core directly opens the orifice of the normally closed valve, or closes the orifice of the normally open valve. These valves operate normally between the highest rated pressures when the pressure is zero. These solenoid valves can be adjusted to 5 to 10 milliseconds for small linear valves and 20 to 40 milliseconds for large linear valves, and the apparatus for producing the chlorine dioxide aqueous solution of the present invention requires accurate and trace feed of raw materials. Is suitable for.

Therefore, it is preferable that the solenoid valves 410, 510, 610 of the present invention use a type of opening an orifice of a valve in which the core is normally closed when electricity is applied. The controller may control the solenoid valve to adjust the open time of the solenoid valve from 0.1 to 30 seconds and the closed time from 0.1 to 15 seconds. Accordingly, the raw material supplied from the first raw material supply unit 400, the second raw material supply unit 500, and the third raw material supply unit 600 equipped with the solenoid valves 410, 510, and 610 is 0.01 ml to 1 ml. It can be controlled to be supplied to.

In addition, the control unit may individually control the opening and closing time of the solenoid valve (410, 510, 610). Therefore, the three valves may be opened or closed simultaneously, or may be opened and closed to have different time periods. For this reason, when the concentration of all three raw materials supplied from the first, second, and third raw material supply unit is different, the supply amount should be changed accordingly.

The dilution water supply unit 700 is connected to the first inlet of the mixing tank by a connecting pipe or a connection hose to supply the dilution water to the mixing tank. The dilution water is preferably water, it is possible to use tap water.

The dilution water supply unit 700 may include a flow meter (not shown) between the dilution water supply unit and the first inlet. The flow meter may control the amount of dilution water supplied from the dilution water supply unit to be supplied in a predetermined amount corresponding to the raw material supplied from the raw material supply units 400, 500, and 600. Here, when the dilution water is water, the dilution water supply unit is a water supply pipe for supplying tap water, it may be connected to the first inlet and the connection hose or connecting pipe.

The air pressurizing pump 800 is connected to the first, second, and third raw material supply parts to pressurize by supplying air to each of the raw material supply parts so that the pressure inside the raw material supply part is higher than the normal pressure. Here, the air pressure pump may be connected to the raw material supply unit (400, 500, 600) by a connection pipe or a connection hose, preferably, the connection pipe or connection hose is connected to the upper portion of the raw material supply unit air from the pump To be injected.

Here, the pressure inside the first, second, and third raw material supply unit 400, 500, 600 pressurized by the air pressure pump 800 maintains 1.1 to 1.5 atm, preferably 1.1 to 1.3 atm. Do it. Given a higher pressure, the pressure must be maintained since there may be a risk of the raw material supply exploding.

Since the pressure between the three raw material supply units 400, 500, 600 and the mixing tank 100 is different from each other by the air pressure pump 800, and each of the three raw material supply units 400, 500, 600 and When the solenoid valves 410, 510, 610 between the mixing tanks 100 are opened, the raw materials are supplied from the raw material supply units 400, 500, 600 to the mixing tank. In addition, the air pressure pump may further include a control unit (not shown) for controlling this. Therefore, the controller controls the air pressure pump to supply air to each of the three raw material supply units 400, 500, and 600.

In addition, each of the first raw material supplier 400, the second raw material supplier 500, and the third raw material supplier 600 may further include a pressure sensing unit. Therefore, by detecting the pressure of each of the three raw material supply unit (400, 500, 600) by the pressure sensing unit, and transmits this information to the control unit of the air pressure pump, the control unit controls the air pressure pump The pressure of the three raw material supply unit 400, 500, 600 is kept constant at a predetermined pressure.

The reactor 200 includes a third inlet 210 and a second outlet 220.

The third inlet 210 is connected to the first outlet 130 of the mixing tank 100 by a connecting pipe or a connection hose, the raw materials mixed in the mixing tank through the third inlet 210 Transfer to the reactor. Therefore, the mixed raw materials to be moved are completed in the reaction tank, the time is within a few minutes, preferably between 1 to 2 minutes.

Here, the third inlet 210 may be provided at the side or the bottom of the reaction tank 200, preferably is provided in the lower portion of the reaction tank.

The second outlet 220 is a place for discharging the chlorine dioxide aqueous solution generated by the reaction is completed in the reaction tank. Here, the second outlet 220 may be provided on the upper side or the side of the reaction vessel, preferably provided on the upper portion of the reaction vessel.

In addition, the second outlet 220 is connected to the fourth inlet 310 of the storage unit 300, the chlorine dioxide aqueous solution generated by the reaction is completed in the reaction tank through the second outlet (4) It moves to the storage unit 300 through 310.

In addition, the chlorine dioxide aqueous solution manufacturing apparatus of the present invention may further include a storage unit 300 is connected to the second outlet of the reaction tank for storing the generated chlorine dioxide aqueous solution.

The storage unit 300 may further include a fourth inlet 310 and a third outlet 320 into which the chlorine dioxide aqueous solution generated by being connected to the second outlet 220 is injected. Herein, the fourth inlet 310 may be provided at an upper side, a lower side, or a side surface of the storage unit 300, and is preferably provided at an upper side. Here, the third discharge port 320 may be provided on the upper, lower or side surface of the storage unit 300.

The storage unit 300 is for storing the chlorine dioxide aqueous solution generated in the reaction tank so that it can be used later if necessary. Therefore, the chlorine dioxide aqueous solution stored in the storage unit generated by the apparatus for preparing the chlorine dioxide aqueous solution may be used after dilution with water again if necessary.

The material of the first, second and third raw material supply unit 400, 500, 600, the mixing tank 100, the reaction tank 200 and the storage unit 300 of the present invention by the raw materials and the generated chlorine dioxide It may be made of any material that does not corrode, and is preferably made of PVC (polyvinyl chloride), PP (polypropylene), Teflon or the like.

2 is a flowchart illustrating a process of preparing an aqueous chlorine dioxide solution using the apparatus for producing an aqueous chlorine dioxide solution of the present invention.

A pressure sensing unit (not shown) connected to the first raw material supplier 400, the second raw material supplier 500, and the third raw material supplier 600 measures the internal pressure of each of the three raw material suppliers (S100). When the internal pressure of each supply unit is lower than a preset pressure, a signal is transmitted to a control unit (not shown) of the air pressure pump 800 to operate the air pressure pump (S110). Accordingly, the internal pressures of the three raw material supply portions are all maintained at 1.1 to 1.5 atm, preferably at 1.1 to 1.3 atm. In this situation, under the control of the control unit 900 of the solenoid valves 410, 510, 610, first, when the solenoid valves 410, 510 of the first and second raw material supply units are opened, for 0.1 second open time. The amount of raw material supplied to the mixing tank 100 from the three raw material supply units is 0.01 to 1ml. At the same time, the dilution water from the dilution water supply unit 700 is supplied into the mixing tank 100 (S120). When the mixing of the raw material and the dilution water supplied from the first and second raw material supply unit by the beads contained in the mixing tank is made, by supplying the raw material by opening the solenoid valve 610 of the third raw material supply unit , All raw materials are mixed well (S130).

When all the raw materials are mixed, the mixed raw material is transferred through the third inlet 210 of the reaction tank 200 through the first outlet 130 of the mixing tank 100 to react the mixed raw materials in the reaction tank. This is completed (S140). The reaction is then complete in minutes.

The chlorine dioxide aqueous solution generated in the reaction tank 200 is transferred to the storage 300 through the second outlet 220 and stored (S150). At this time, the stored chlorine dioxide aqueous solution may be used after dilution in water if necessary.

In another aspect, the present invention provides a method for producing a chlorine dioxide aqueous solution.

The manufacturing method of the present invention includes the steps of pressurizing the pressure of the first raw material supply unit for supplying chlorite, the second raw material supply unit for supplying hypochlorite and the third raw material supply unit for supplying sulfuric acid or hydrochloric acid by an air pressure pump; Controlling a solenoid valve to supply raw materials to the mixing tank from the first raw material supply unit and the second raw material supply unit; Supplying dilution water from the dilution water supply unit to the mixing tank; Controlling a solenoid valve to supply raw materials from the third raw material supply unit to a mixing tank; And moving the raw materials mixed in the mixing tank to the reaction tank to generate a chlorine dioxide aqueous solution.

Here, the raw materials supplied to the mixing tank may further include a step of stirring by the beads contained in the mixing tank.

Here, the beads have a size of 1 to 10mm.

The method may further include storing the chlorine dioxide aqueous solution generated in the reactor in a storage unit.

The chlorite is sodium chlorite, and the hypochlorite is sodium hypochlorite.

The present invention will be described in more detail with reference to the following examples.

Example  1. Chlorine Dioxide Aqueous Solution Manufacturing example  One

0.8 ml of sodium chlorite solution (NaClO ₂ , 30.2 Vol%) of the first raw material supply part and sodium hypochlorite solution (NaClO, 11.6 Vol%) of the second raw material supply part for 1 second at 1 second intervals using each solenoid valve Was supplied to the mixing tank for a total of 28 seconds, and at the same time, dilution water was supplied from the dilution water supply to the mixing tank at a rate of 33 ml / min. The sulfuric acid solution (H ₂ SO ₄ , 16.4 Vol%) of the third raw material supply part through the second inlet to the raw materials uniformly mixed by the glass beads contained in the mixing tank by controlling the solenoid valve for 1 second interval 0.8 ml was injected for 1 second, for a total of 28 seconds. Simultaneously with the injection of sulfuric acid, the mixed raw materials were transferred to the reactor to be completed.

In order to confirm the production amount and the yield of the reaction of the completed chlorine dioxide, 10 ml of the chlorine dioxide produced after the reaction was added to the prepared solution containing KI and phosphate buffer solution (pH = 7) to form I ₂ , and the iodine was added. Na ₂ S ₂ O ₃ was titrated with 0.1 N titration solution. 7.2 ml of sodium thiosulfate was consumed. As a result, the amount of ClO ₂ produced in the above example was 4.856 g / l, and the reaction yield was very high at 97.1%.

Example  2. of chlorine dioxide aqueous solution Manufacturing example  2

0.4 ml of sodium chlorite solution (NaClO ₂ , 30.2 Vol%) from the first feeder and sodium hypochlorite solution (NaClO, 11.6 Vol%) from the second feeder for 0.5 seconds at 1.6 second intervals with each solenoid valve. Was fed for a total of 14 seconds. At the same time, dilution water was supplied from the dilution water supply unit to the mixing tank at a rate of 66 ml / min.

The sulfuric acid solution (16.4 Vol%) of the third raw material supply part was controlled through the second inlet to the raw materials uniformly mixed by the glass beads contained in the mixing tank by controlling the solenoid valve at 0.4 second intervals for 1.5 seconds. ml was injected for a total of 14 seconds. Simultaneously with the injection of sulfuric acid, the mixed raw materials were transferred to the reactor to be completed.

In order to confirm the production amount and the reaction yield of the completed chlorine dioxide, 10 ml of the chlorine dioxide aqueous solution generated above was added to the prepared solution containing KI and phosphate buffer solution (pH = 7) to form I ₂ , and the I ₂ was added. Titrate with 0.1 N Na ₂ S ₂ O ₃ titrant. This I ₂ consumed 3.5 ml of Na ₂ S ₂ O ₃ 0.1N.

As a result, the amount of ClO ₂ produced in the above example was 2.36 g / l, and the reaction yield was very high at 95.1%.

Example  3. of chlorine dioxide aqueous solution Manufacturing example  3

Sodium chlorite solution (NaClO ₂ , 30.3 Vol%) of the first raw material supply and sodium hypochlorite solution (NaClO, 11.6 Vol%) of the second raw material supply 0.16 ml at intervals of 3.8 seconds using each solenoid valve Was fed for a total of 3 seconds. At the same time, dilution water was supplied from the dilution water supply unit to the mixing tank at a rate of 93 ml / min.

The sulfuric acid solution (16.4 Vol%) of the third raw material supply part was controlled through the second inlet to the raw materials uniformly mixed by the glass beads contained in the mixing tank by controlling the solenoid valve at 0.16 for 0.2 seconds at 3.8 second intervals. ml was injected for a total of 3 seconds. Simultaneously with the injection of sulfuric acid, the mixed raw materials were transferred to the reactor to be completed.

In order to confirm the amount, and the reaction yield of the reaction is completed, chlorine dioxide, wherein the ready-to chlorine dioxide solution 10ml generate KI and phosphate buffer (pH = 7) was added to a solution containing the generated the I ₂ and an I ₂ Na Titrate with ₂ S ₂ O ₃ 0.1N titrant. Na ₂ S ₂ O ₃ 0.1N spent was 0.69 ml.

As a result, the amount of ClO ₂ produced in the above example was 0.465 g / l, and the reaction yield was 93.8%.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made to the embodiment without departing from the spirit or spirit of the invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

1 is a structural block diagram of an apparatus for producing a chlorine dioxide aqueous solution of the present invention.

2 is a flowchart illustrating a process of preparing an aqueous chlorine dioxide solution using the apparatus for producing an aqueous chlorine dioxide solution of the present invention.

* Explanation of symbols for the main parts of the drawings

100: mixing tank 200: reaction tank

300: storage unit 400: first raw material supply unit

500: second raw material supply unit 600: third raw material supply unit

700: dilution water supply unit 800: air pressure pump

Claims (12)

In the manufacturing apparatus of the chlorine dioxide aqueous solution, A mixing tank in which the raw materials are mixed, the first inlet and the second inlet through which the raw material is injected, and the first outlet through which the mixed raw material are discharged; A reaction tank having a third inlet connected to the first outlet, and a second outlet through which the chlorine dioxide aqueous solution generated by the reaction of the mixed raw material is discharged; A first raw material supply unit connected to the first inlet to supply chlorite; A second raw material supply unit connected to the first inlet and supplying hypochlorite; A third raw material supply unit connected to the second inlet to supply sulfuric acid or hydrochloric acid; A dilution water supply unit connected to the first inlet to supply dilution water; A solenoid valve positioned between the first raw material supply unit and the second raw material supply unit and the first inlet, respectively, and positioned between the third raw material supply unit and the second inlet to control the amount of raw material supply; And an air pressurizing pump part connected to the first raw material supply part, the second raw material supply part, and the third raw material supply part to supply and pressurize air to the raw material supply part. The method of claim 1, The mixing tank further comprises a bead for stirring the supplied raw materials chlorine dioxide aqueous production apparatus. The method of claim 2, The bead is a device for producing a chlorine dioxide aqueous solution having a size of 1mm to 10mm. The method of claim 1, The chlorine dioxide aqueous solution manufacturing apparatus further comprises a storage unit connected to the second outlet for storing the generated chlorine dioxide aqueous solution.  The method of claim 1, The chlorite is a chlorine dioxide aqueous solution manufacturing apparatus that is sodium chlorite. The method of claim 1, The hypochlorite is sodium hypochlorite manufacturing apparatus of the aqueous solution of chlorine dioxide. In the method for producing a chlorine dioxide aqueous solution, Pressurizing the pressure of the first raw material supplier for supplying chlorite, the second raw material supply for supplying hypochlorite, and the third raw material supply for supplying sulfuric acid or hydrochloric acid by an air pressure pump; Controlling a solenoid valve to supply raw materials to the mixing tank from the first raw material supply unit and the second raw material supply unit; Supplying dilution water from the dilution water supply unit to the mixing tank; Controlling a solenoid valve to supply raw materials from the third raw material supply unit to a mixing tank; Method of producing a chlorine dioxide aqueous solution comprising the step of moving the raw material mixed in the mixing tank to the reaction tank to produce a chlorine dioxide aqueous solution. The method of claim 7, wherein The method of manufacturing a chlorine dioxide aqueous solution further comprises the step of stirring the raw materials supplied to the mixing tank by the beads contained in the mixing tank. The method of claim 8, The bead is a device for producing a chlorine dioxide aqueous solution having a size of 1mm to 10mm. The method of claim 7, wherein The method for producing a chlorine dioxide aqueous solution further comprising the step of storing the aqueous solution of chlorine dioxide produced in the reaction unit. The method of claim 7, wherein The chlorite is a method of producing a chlorine dioxide aqueous solution is sodium chlorite. The method of claim 7, wherein The hypochlorite is a method of producing a chlorine dioxide aqueous solution is sodium hypochlorite.

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