KR101015542B1 - The continuous chlorine dixide generation method and system for the same - Google Patents

Abstract

The present invention relates to a method and apparatus for continuously producing a chlorine dioxide gas by reacting a chlorite solution, a hypochlorite solution and an acid solution.

In the continuous method and apparatus for producing chlorine dioxide gas of the present invention, the three kinds of solutions are mixed and reacted, so that the chlorine dioxide gas is produced while performing the initial and medium reactions of the mixed solution in the first reactor, and in the primary reactor. The remaining reaction of the mixed solution that is not completed is performed in the secondary reactor, and the points at which the production of chlorine dioxide gas is temporarily stopped in the primary and secondary reactors are not overlapped with each other. The technical feature is that the gas can be produced continuously.

Chlorine Dioxide, Chlorite, Hypochlorite

Description

The continuous chlorine dixide generation method and system for the same

The present invention relates to a continuous method and apparatus for producing chlorine dioxide gas, and more particularly, to mix a starting material by injecting air into a primary reactor in which each starting material such as chlorite solution, hypochlorite solution and acid solution is mixed. Chlorine dioxide gas is generated from the solution, and the residual chlorine dioxide gas in the partial reaction mixture solution is injected into the secondary reactor while the partial reaction mixture solution in which the concentration of the chlorine dioxide gas is reduced by the first reaction is introduced into the secondary reactor. At the same time to generate a new mixed solution is filled in the primary reactor, and a method for producing a chlorine dioxide gas continuously without interruption and apparatus for implementing the same.

As the consumption of meat has increased along with the improvement of living standards, large-scale livestock farming, which has been carried out in small scales at individual farms, has become large. As the livestock farming has increased, the odor generated from livestock manure is also very severe.

In addition, the odors in the facility for recycling the discarded food waste as compost are also similar to the livestock farms.In addition to the improvement of the working environment such as livestock houses and composting facilities, the removal of odors is also required to improve the environment in nearby areas. The decrease is very urgent.

As a means for effectively removing odors, such as a barn or composting facility, chlorine dioxide is a typical method. Chlorine dioxide is a compound having excellent deodorizing function for decomposing odor gas, and also as a strong oxidizing agent. It is also emerging as an alternative to chlorine, a disinfectant used in water purification plants.

The method for producing chlorine dioxide, which can be used for sterilization, disinfection, deodorization, bleaching, etc., can be largely divided into a method of reducing chlorate and a method of oxidizing chlorite. On the other hand, the oxidation method using alkali metal chlorite as a starting material can be produced with a simple facility and little investment, so the method using chlorite is widely used.

However, in the conventional chlorine dioxide production, mainly chlorine dioxide solution is manufactured. In Korean Patent Publication No. 1997-6163, "Method for producing continuous static chlorine dioxide water and a device using the same" are disclosed in Korean Patent Publication No. 97-893. Many have been published, such as "Method for producing a stabilized aqueous solution of chlorine dioxide".

However, when chlorine dioxide is prepared as a liquid as described above, when chlorine dioxide gas is to be used, the acid is mixed with the chlorine dioxide liquid and then air is injected into the mixed liquid, that is, aeration is performed to dissolve the dissolved dioxide in the mixed liquid. Chlorine gas is generated, there is an inconvenience to collect and use it.

In addition, in the conventional odor removal apparatus using chlorine dioxide, the raw material solution was mixed and reacted under normal pressure and normal pressure to prepare a chlorine dioxide solution, and then diluted with water. Chlorine dioxide solution cannot be used because the microorganisms necessary for composting are extinguished by strong sterilizing power.

That is, in the case of the composting facility, in order to remove odor generated during fermentation such as animal powder with chlorine dioxide, it is preferable to inject chlorine dioxide gas into odor gas dispersed in the air so that the odor gas is decomposed and converted.

As the necessity of the chlorine dioxide gas as described above is increased, a device for producing chlorine dioxide directly in the gas phase rather than being manufactured in the liquid phase has been developed, and the "chlorine dioxide production apparatus" is published in Korean Laid-Open Patent Publication No. 2005-16034.

The present invention includes a reaction chamber in which a chlorite solution and an acid are mixed and reacted, and continuously blows air into the mixed solution of the chlorite solution and acid supplied into the reaction chamber by using an aeration device, thereby producing chlorine dioxide gas. As an apparatus, this apparatus is capable of continuously producing chlorine dioxide gas while supplying chlorite solution and acid as starting materials into the reaction chamber and continuously discharging the reaction waste liquid.

However, the apparatus of the present invention has the disadvantage that, as the starting liquid is discharged while supplying the chlorite solution and the acid as starting materials, the starting liquid, which is newly supplied or not completed, is discharged together with the waste liquid.

That is, in order to complete the reaction of the supplied starting material and to prevent the newly supplied starting material from being discharged with the waste liquid, it is necessary to supply the starting material again in the completely discharged waste liquid. Chlorine dioxide gas cannot be produced continuously and there is a time when chlorine dioxide gas cannot be produced between the discharge of the waste liquid and the resupply of starting materials.

Unlike the above invention, as a device for continuously producing a chlorine dioxide gas by connecting a plurality of reactors in sequence, Korean Patent Publication No. 521652 discloses, "A high purity manufacturing apparatus for gaseous chlorine dioxide, a manufacturing method thereof, and a long-term storage method." Posted.

In the apparatus of the present invention, in the first reactor, chlorine dioxide gas is first prepared by mixing chlorine and sodium chlorine dioxide solution, and then passing the prepared chlorine dioxide solution sequentially through a plurality of intermediate reactors connected in sequence. The chlorine dioxide gas is continuously produced by passing through the final reactor filled with sodium chlorine dioxide solution through a single transfer pipe.

However, the apparatus is not only large and complicated by the first production of chlorine dioxide solution by first reacting chlorine and sodium chlorine dioxide solution, but also each intermediate reactor is connected to the chlorine dioxide gas outlet which is connected to the transfer pipe. Since the inside of the reactor is in a sealed state, the solution level in the intermediate reactor is not maintained in the same state and is different, so that the flow of the solution through the intermediate reactor is not constant and the reaction is not smoothly performed.

In addition, a conventional method or apparatus for producing chlorine dioxide gas mainly uses chlorite and acid solution, and the reaction conditions are not only difficult to efficiently prepare chlorine dioxide gas by mixing chlorite and acid solution. The disadvantage is that it is very difficult to maintain precisely.

The present invention has been made to solve the problems of the conventional method and apparatus for producing chlorine dioxide gas by mixing chlorite and acid solution, and the method and apparatus for the continuous production of chlorine dioxide gas It is an object of the present invention to provide.

Another object of the present invention is to provide a method and an apparatus capable of maximizing the reactivity of a starting material for producing chlorine dioxide gas, as well as making it more efficient.

The object of the present invention is a sequential separation reaction process of reacting the mixed solution mixed with a plurality of starting materials in a secondary manner, and the first reaction and the first reaction to the mixed solution of the starting materials first connected to the pipe to implement this It is achieved by a pair of reactors for respectively causing a secondary reaction to a partial reaction mixture solution in which the concentration of chlorine dioxide gas is dropped by the secondary reaction, a hypochlorite solution, which is one of the starting materials, and the like.

In the method and apparatus for continuously producing chlorine dioxide gas of the present invention, the chlorine dioxide gas production stop time of each of the two reactors does not overlap each other, although there is a time to stop the production of chlorine dioxide gas in each of the primary and secondary reactors. This has the advantage that the production of chlorine dioxide gas is continuously maintained.

In addition, since the hypochlorite solution, which further increases the reactivity with the chlorite solution, is used, there is an advantage that the manufacturing efficiency of the chlorine dioxide gas is improved.

In addition, since the chlorine dioxide gas is continuously produced, there is an advantage that can effectively remove or minimize the unpleasant odor of the facility where the odor is constantly generated, such as a barn or composting facilities.

The present invention relates to a method and an apparatus capable of continuously producing chlorine dioxide gas without interruption.

The present invention provides a continuous method for producing chlorine dioxide gas, so that the chlorine dioxide gas is continuously generated when the chlorine dioxide gas is produced. The continuous production apparatus for this purpose includes an alkali metal chlorite solution, hypochlorite solution, and an acid solution. As a starting material, chlorine dioxide gas is produced and discharged by injecting air into a mixed solution of three kinds of starting materials, and the process of producing chlorine dioxide gas is stopped by using two reactors connected to each other by pipes. It has technical features in a structure that is made continuous.

The apparatus of the present invention for continuously producing chlorine dioxide gas comprises: a solution tank in which three kinds of starting materials are stored; A primary reactor connected to the solution tank and provided with a main gas discharge pipe at an upper end thereof; A secondary reactor connected to the primary reactor and having a secondary gas discharge pipe joined to the main gas discharge pipe of the primary reactor at an upper end thereof; An air injector for injecting air into the primary and secondary reactors; A waste tank connected to the secondary reactor; And so on.

At this time, each pipe connecting the solution tank and the primary reactor is provided with a solution injector such as a pump.

Looking at the process of producing chlorine dioxide gas continuously in the apparatus of the present invention configured as described above are as follows.

When three kinds of starting materials in each of the solution tanks are supplied to the primary reactor and air is injected into the mixed solution, that is, aeration or aeration, the three kinds of starting materials are chlorine dioxide by the reaction shown in the following formula (1). Will form a gas.

At this time, the formed chlorine dioxide gas is dissolved in the mixed solution, the dissolved chlorine dioxide gas is separated and discharged from the mixed solution together with the air by the air injected into the mixed solution, and the chlorine dioxide gas mixed with the air is It is collected through the main discharge pipe.

When the mixed solution is filled up to the highest water level in the primary reactor, only the air is injected for a certain period of time while the supply of starting materials is stopped to continuously generate chlorine dioxide gas, and then the first and second reactors before the reaction of the mixed solution is completed. By opening the connection pipe valve of the reactor and discharging the partial reaction mixture solution, which is the mixed solution in the first reactor, in which the reaction is not completed, into the secondary reactor, and also injecting air into the secondary reactor. Allows chlorine dioxide gas to be produced together in the secondary reactor.

In this case, the chlorine dioxide gas discharged from the secondary reactor moves to the main discharge pipe through the auxiliary discharge pipe together with the air and joins with the chlorine dioxide gas discharged from the primary reactor.

When the discharge of the mixed solution in the primary reactor is completed, the connecting material of the primary and secondary reactors is closed, and the starting material is supplied to the primary reactor again. During this process, chlorine dioxide gas production in the primary reactor is temporarily Although it is stopped, since the chlorine dioxide gas is continuously manufactured in the secondary reactor, the production of the chlorine dioxide gas is continued in the manufacturing apparatus as a whole.

In addition, as described above, when the discharge of the mixed solution is completed, the starting material and the air are input again, and only the air is injected for a predetermined time while the mixed solution containing the starting material is filled in the first reactor, followed by partial reaction. The process of discharging the mixed solution into the secondary reactor is repeated. The reaction in the secondary reactor at some point before the partial reaction mixed solution is discharged into the secondary reactor, that is, injecting the starting material and air together and injecting only the air, is repeated. The completed waste liquid is discharged to the waste tank, in which the chlorine dioxide gas production is stopped in the secondary reactor and chlorine dioxide gas is produced only in the primary reactor.

As described above, the method and apparatus of the present invention discharge the partial reaction mixture solution to the secondary reactor in which the reaction can be continued by not completing the reaction of the mixed solution mixed with the starting material in the primary reactor, and in the secondary reactor. Chlorine dioxide gas is continuously produced from the partial reaction mixture solution to complete the reaction of the partial reaction mixture solution.

In addition, before the remaining reaction of the partial reaction mixture solution in the second reactor is completed, the starting material is supplied to the first reactor again to produce chlorine dioxide gas in the first reactor, and the partial reaction mixture from the first reactor to the second reactor. By discharging the completed waste liquid from the secondary reactor before discharging the solution, the production of the combustion gas can be continued without stopping.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

1 is a block diagram of the apparatus of the present invention.

As shown in the continuous generator of the present invention chlorine dioxide gas,

Chlorite solution tank (11), hypochlorite solution tank (12) and acid solution tank (13);

The primary reactor 14 is provided with a main discharge pipe (P1) at the top;

In order to inject the solution stored in each of the solution tanks 11, 12 and 13 into the primary reactor 14, the solution tanks 11, 12 and 13 are connected to the primary reactor 14 by piping. Solution injectors 15, 16 and 17;

A secondary reactor having a secondary discharge pipe (P2) is connected to the primary reactor 14 via a connecting pipe valve (v), connected to the main discharge pipe (P1) of the primary reactor (14) at the top ( 18);

An air injector 19 piped to the primary and secondary reactors 14 and 18, respectively;

A waste tank 20 piped to the secondary reactor 18; And the like.

In this case, the air injector 19 injects air into the mixed solution or the partial reaction mixed solution filled in each of the reactors 14 and 18, and reacts efficiently by making three starting materials into a uniform mixed solution. Aeration means 19A are provided in each of the reactors 14 and 18 so that the chlorine dioxide gas dissolved in the mixed solution can be effectively separated and discharged from the mixed solution. It is preferable to connect the pipe to the injector 19.

Examples of the aeration means 19A include a porous porous ceramic having micropores through which air can pass, and the air injected into the aeration means 19A is mixed with the fine pores of the aeration means 19A. Aerated into.

The chlorite solution, hypochlorite solution and acid solution stored in each of the solution tanks 11, 12 and 13 are fed into the primary reactor 18 and then mixed in the reactor to form a mixed solution. The hyperchlorite solution may be mixed just before being introduced into the primary reactor (14).

That is, without using two solution injectors (15, 16), as shown in Figure 2, by using a mixed solution injector (15 ') to inhale the chlorite solution and hypochlorite solution, respectively, A mixed solution of the mixed chlorite solution and hypochlorite solution may be introduced into the primary reactor 14.

The continuous production method of the chlorine dioxide gas of the present invention using the apparatus of the present invention configured as described above,

A solution / air injection step of injecting air into the mixed solution mixed with each other in the primary reactor while simultaneously introducing the chlorite solution, the hypochlorite solution and the acid solution into the primary reactor;

An air injection step of injecting only air into the mixed solution for a predetermined time while stopping the input of each solution to the primary reactor;

A mixed solution transfer step of discharging the partial reaction mixed solution which is a mixed solution in which the reaction is not completed in the first reactor to the second reactor and injecting air into the partial reaction mixed solution supplied to the second reactor;

A waste liquid discharge step of discharging the waste liquid from which the reaction is completed in the secondary reactor while sequentially performing the solution / air injection step and the air injection step to the first reactor in which the partial reaction mixture solution is discharged;

Repeating the mixed solution transfer step and the waste solution discharge step; It is made by sequential processes.

At this time, the solution / air injection step, the step of mixing the chlorite solution and hypochlorite solution; Simultaneously inputting the mixed solution of the mixed chlorite solution and the hypochlorite solution and the acid solution into the primary reactor, respectively; It may be made of.

1 is a block diagram of an embodiment continuous manufacturing apparatus of the present invention.

Figure 2 is a connection diagram of a mixed solution injector constituting another embodiment of the present invention continuous manufacturing apparatus.

         ((Explanation of symbols for main part of drawing))

        11,12,13. Solution Tank 14. Primary Reactor

        15,16,17. Solution injector 15 '. Mixed Solution Injector

        18. Secondary reactor 19. Air injector

        19A. Aeration means 20. Waste tank

        P1. Main discharge pipe P2. Auxiliary discharge pipe

Claims (5)

A solution / air injection step of preparing chlorine dioxide gas in the primary reactor by injecting air into the mixed solution mixed with each other by adding chlorite solution, hypochlorite solution and acid solution into the primary reactor; An air injection step of preparing chlorine dioxide gas in the primary reactor by injecting only air into the mixed solution of the primary reactor for a predetermined time; While discharging the partial reaction mixture solution in the primary reactor to the piped secondary reactor, air was injected into the partial reaction mixture solution supplied to the secondary reactor to produce chlorine dioxide gas together in the primary reactor and the secondary reactor. Mixed solution transfer step; And Chlorine dioxide gas is produced in the secondary reactor while the partial reaction mixture solution is discharged and the pipe connection between the primary reactor and the secondary reactor is blocked, and the chlorite solution, hypochlorite solution and Injecting air into a mixed solution mixed with each other by adding an acid solution and injecting only air into the mixed solution of the primary reactor for a predetermined time while the mixed solution fills the primary reactor to produce chlorine dioxide gas in the primary reactor. While the waste liquid discharge step of discharging the waste liquid in the secondary reactor; comprising, it is a continuous production method of chlorine dioxide gas, characterized in that for repeating the mixed solution transfer step and waste liquid discharge step. The method of claim 1, wherein the solution / air injection step, Mixing the chlorite solution and the hypochlorite solution; And Injecting the mixed solution and acid solution, respectively, mixed in the above step; Continuous production method of chlorine dioxide gas, characterized in that consisting of. Chlorite solution tank, hypochlorite solution tank and acid solution tank; A primary reactor equipped with a main discharge pipe; A solution injector for sucking the solutions of the chlorite solution tank, the hypochlorite solution tank, and the acid solution tank and supplying them to the primary reactor; A secondary reactor connected to the primary reactor via a connection pipe valve and having an auxiliary discharge pipe connected to the main discharge pipe; An air injector piped to the primary reactor; And And a waste liquid tank connected to the secondary reactor. Chlorine dioxide gas is prepared in the primary reactor by introducing air into the mixed solution prepared by adding chlorite solution, hypochlorite solution and acid solution into the primary reactor, and opening the connecting pipe valve before the completion of the reaction of the mixed solution. While simultaneously discharging the partial reaction mixture solution into the secondary reactor, air was also injected into the secondary reactor to prepare chlorine dioxide gas together in the primary and secondary reactors, and the secondary reactor Upon completion of discharging, close the connecting pipe valve and supply chlorine solution, hypochlorite solution and acid solution to the primary reactor at the same time to produce chlorine dioxide gas in the secondary reactor, and to supply the chlorite to the primary reactor again. Injecting air into the solution, hypochlorite solution and acid solution to prepare chlorine dioxide gas in the primary reactor Apparatus for continuous fabrication of chlorine dioxide gas, characterized in that for discharging the reaction is completed the waste liquid in the second group the reaction vessel with the waste tank. The method of claim 3, The solution injector is a continuous production of chlorine dioxide gas, characterized in that separated by three solution injectors for sucking and supplying the solution of the chlorite solution tank, hypochlorite solution tank and acid solution tank to the primary reactor, respectively Device. The method of claim 3, An aeration means is provided inside the primary reactor, the aeration means is connected to the air injector pipe, the aeration means is a continuous manufacturing apparatus of chlorine dioxide gas, characterized in that composed of a porous porous ceramic.

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