KR20030059926A - Pressurized tubular reactor - Google Patents

Abstract

PURPOSE: Provided is a pressurized tubular reactor being effectively causing reaction between liquid and chemicals therein by inputting chemicals thereinto while fluidizing liquid. CONSTITUTION: The reactor comprises a tubular unit with stacked tubes(10) with a plurality of curved portions(20) for inducing liquid mixing therein, a pressurizing unit for applying a pressure to liquid so as for the liquid to be input to the tubular unit, and a chemical dosing unit(30) for feeding chemicals to the liquid flowing through the tubular unit, wherein the tubular unit has at least one ultrasonic vibrator.

Description

Pressurized Tubular Reactor

The present invention relates to a reactor, and more particularly, to a pressure pipeline type reactor that reacts in a flow field by administering a chemical to a fluid flowing in the pipeline.

In general, a reactor refers to a mechanism for conducting a chemical reaction, also called a reaction apparatus. These reactors are often manufactured to control the reaction freely, and are classified into batch, flow, and semibatch according to the operating method. Once the raw material is added, the reaction is continued until the purpose is achieved, and the distribution method is a method of continuously supplying the raw material and drawing out the product. In addition, semibatch is a method of adding a raw material as the raw material is initially added and the reaction proceeds.

Which method is adopted, the chemical reaction mechanism, reaction rate, type and yield of the product in the chemical reaction, the mechanical design factors that will determine the reaction conditions such as temperature, pressure, reactant concentration, and the mechanism of mass transfer in the reactor, And it is determined by considering various factors such as operating conditions such as residence speed in the reactor. For this reason, there are optimum reaction conditions, operating conditions, and reactor types for each chemical reaction, and various types of reactors are developed and used today. Many of these reactors employ mechanical agitation using propellers or impellers as a way to improve internal mass transfer, so continuously stirred tank reactors (CSTRs) are most widely used.

Today, water treatment processes, such as water purification and wastewater treatment processes, include pretreatment processes such as pH control or flocculant administration. The most common reactor type used in these processes is a continuous stirred reactor. Looking at the wastewater treatment process, the wastewater is introduced into the reactor at a constant rate, is mixed with chemicals such as acid, base, or polymer flocculant while staying in the reactor for a certain time, and again, a certain amount exits through the outlet. Therefore, in the continuous stirred reactor, uniform mixing of the injected chemicals and smooth discharge of the reacted fluid are the main factors affecting the reactor design and performance.

No matter how well the material transfer design is inside the reactor, the continuous stirred reactor has the following fundamental problems. First, the fluid stays in the reactor for a certain time, so that the chemical is not reacted with the influent water continuously introduced, but the chemical is diluted by the remaining residence fluid present in the reactor. The chemical will also react with the retention fluid. Therefore, dilution and reaction of the injected chemicals in the retention fluid can lead to waste and unexpected negative effects. The most commonly used pretreatment in the water treatment process is a method of flocculation and flocculation of suspended solids, chromatic substances or dissolved organic substances using a flocculant. The effectiveness of the flocculant in this process depends on the pH, the nature of the contaminant, and the dosage ratio of the contaminant and flocculant. Therefore, if the reactants stay in the reactor, the characteristics of the contaminants of the wastewater flowing into the reactor and the fluid staying in the reactor may vary with time, which affects the efficiency of the flocculation process according to the previously measured optimal flocculation conditions. .

For example, polymer flocculant, one of the most widely used flocculants in the water treatment process, has a uniform viscosity even if it is dissolved before use before being injected into the reactor. It is not distributed. In addition, the polymer flocculant tends to react with the reactants staying in the surroundings (ie, precipitates, colloids or polymer flocs from previous reactions) rather than with contaminants contained in the incoming raw water. This tendency is likely to increase the partial cohesion of the polymer as the retention material in the reactor increases, and the effect of coagulation of small-sized contaminants such as dissolved organic matter in raw water is hardly expected. In this case, the reaction efficiency of the injected chemicals is lowered, more chemicals are consumed, and the mass transfer in the flocculator is not good, and the retention of sediment or floc in the reactor deepens and the efficiency of the water treatment process is increased over time. It can degrade and cause driving difficulties.

Most existing continuous stirred reactors use a propeller stirrer for stirring, and have a structure in which the stirrer is installed at the center of the reactor. Therefore, the larger the size of the stirrer, the greater the likelihood of the presence of dead volumes in which the mass transfer in the reactor is stagnant, and the more homogeneous mixing in the reactor becomes. In addition, it becomes difficult to uniformly disperse the chemicals introduced into the reactor, and the probability of directly reacting with the contaminants contained in the raw water decreases, thereby reducing the efficiency of the reactor. In addition, as the conventional continuous stirred reactor increases in size, the installation space and operation cost greatly increase. In addition, the continuous stirred reactor is difficult to maintain the reactor temperature, if the temperature drops in winter, the operating efficiency of the reactor may be drastically reduced. In particular, when installed outdoors, the temperature effect of the winter is severe, and when the reactor is used in the microbial process, this effect causes a very serious process problem.

The present invention has been made to solve the above problems, a pressurized pipe line that can induce an efficient reaction between the drug and the fluid by injecting various chemicals into the flow field of the fluid while the fluid is forced to flow into the pipe line The purpose is to provide a type reactor.

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to

1 is a perspective view showing a pressurized pipeline reactor according to a first embodiment of the present invention.

2 is a view showing a chemical injection unit installed in the reactor of the present invention.

Figure 3 is a partial cutaway showing a state in which the wire guide is formed in the first pipe in the reactor of the present invention.

4 is a partial cutaway view showing a state in which a fan is installed in the first pipe in the reactor of the present invention.

5 is a view showing a bypass pipe for adjusting the flow rate installed in the reactor of the present invention.

6 is a view showing a state in which the air injection unit is installed in the reactor of the present invention.

7 is a diagram showing a modification of the present invention.

8 is a view showing a state in which the ultrasonic vibrator is installed in the reactor of the present invention.

Figure 9 is a perspective view showing another embodiment of the pressure pipeline type reactor according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1,1 '.. Reactor 10,10' .. 1 Piping 12. Wired guide

14. Fan 20 .. 2nd pipe 20 '. Venturi pipe

22. Orifice 30. Chemical injection part 40. Bypass pipe

50..Air injection part 58,58 '.. Ultrasonic vibrator

In order to achieve the above object, the pressurized pipeline reactor according to the present invention is a stacked pipeline unit having a plurality of curved portions for inducing mixing of fluid passing therein, and pressurizing means for applying pressure to introduce fluid into the pipeline unit. And a chemical injection unit installed in the pipeline unit to inject the chemical into the fluid.

Preferably, the piping unit is provided with one or more ultrasonic vibrators for vibrating the fluid.

In addition, the pipeline unit includes a plurality of straight first pipes and curved second pipes connecting the ends of the first pipes, and the first pipes are preferably arranged to be stacked up and down.

In this case, it is also preferable that at least some of the plurality of first pipes consist of a plurality of small diameter pipes, and two or more small diameter pipes are connected in parallel between adjacent second pipes.

Preferably, a spiral wired guide may be formed on an inner circumferential surface of the inlet of the first pipe, and one or more fans may be installed in the first pipe by a fluid flow.

In this case, the chemical injection unit is preferably installed in the second pipe, the second pipe in which the chemical injection unit is provided, the orifice may be formed in a position communicating with the chemical injection unit, and the chemical injection unit bypass for adjusting the chemical injection amount The tube can be installed.

Preferably, such a reactor may further include an air injection unit installed in the second pipe in a vertical direction to supply air particles into the fluid through an diffuser having fine pores, and the second pipe area in which the air injection unit is installed It is also preferable that it consists of the venturi tube which becomes narrower gradually.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a view showing the configuration of the pressure pipeline type reactor 1 according to the present invention. Referring to the drawings, the pressurized pipeline reactor 1 of the present invention is made in the form of a pipeline as a whole, and the fluid to be reacted passes through the pipeline. In more detail, in the pressurized pipeline reactor 1 of the present invention, a plurality of straight pipes (first pipes, 10) are stacked up and down, and each straight pipe 10 is curved pipes (second pipes, 20) are made of conduit units of the connected type. In this case, the plurality of first pipes 10 are configured to be spaced apart from each other by a predetermined distance from the adjacent pipe, and the second pipe 20 connects the ends of the two adjacent first pipes 10 to each other. Both the first pipe 10 and the second pipe 20 provide a flow field through which the fluid passes, and in particular, the second pipe 20 induces mixing of the fluid by the curved shape. In addition, as another example, it is possible to manufacture the entire pipeline unit as a single pipe without dividing the first pipe and the second pipe, but in this embodiment, the first pipe and the second pipe are manufactured and connected separately. Explain.

The fluid to be reacted should be introduced into the conduit units (first and second pipes), and for this purpose, separate pressurization means (not shown) are connected to the conduit units 10 and 20. The pressurizing means serves to apply pressure to introduce fluid into the conduit units 10 and 20, and any device capable of performing this role can be used. Typically, a pump may be used as the pressurizing means for introducing the fluid.

Preferably, the conduit units (10, 20) is configured in the vertical direction, the pressurizing means is installed so that the fluid flows from the bottom of the conduit units (10, 20) to the top. Typically, since bubbles may be formed by various chemical reactions in the reactor 1, when the fluid moves from the bottom to the top, bubbles may naturally be discharged to the outside according to the flow direction of the fluid. This upward flow structure is also well compatible with the air injection section described below, which will be described in detail later.

Such a conduit unit allows the fluid to continuously flow along each of the pipes 10 and 20, and injects the chemical directly into the flow field of the fluid. To this end, the chemical injection unit 30 is installed in the pipeline unit, and the chemical injection unit 30 is preferably installed in the curved second pipe 20. This is because the second pipe 20 has a more severe flow of the fluid than the first pipe 10 due to the curved shape, and thus the injected chemicals are mixed with the fluid at a higher speed, thereby enabling a more efficient reaction. to be.

In order to maximize the mixing between the chemical and the reaction fluid, as shown in Figure 2, orifice 22 may be formed in the region where the chemical injection portion 30 is installed. That is, referring to FIG. 2, a narrow orifice 22 is formed in a portion of the second pipe 20 in which the chemical injection portion 30 is installed, and the chemical is injected into the orifice 22. In this case, the injection pipe 32 of the chemical injection portion 30 is connected to the second pipe in which the orifice 22 is formed, and a plurality of injection holes 36 for injection of chemicals are formed around the orifice 22.

In general, fluid passing through a constant conduit passes through a narrow orifice 22, resulting in a faster flow rate and a lower pressure. Thus, when the fluid passes through the orifice 22, the drug is sucked through the inlet 36 formed around the orifice 22, and the drug is instantly mixed with the fluid flowing at high speed. Therefore, if the orifice 22 is used, a separate driving means is not required for chemical injection, but the valve 38 is installed in the injection pipe 32 so as to open the valve 38 only when chemical injection is desired. Just do it. In addition, the chemical injection unit 30 may be provided with a bypass tube for adjusting the chemical injection amount, the bypass tube has a configuration similar to the bypass pipe for flow control described later.

As such, the chemicals introduced into the conduit units 10 and 20 are continuously flowed and mixed in each pipe together with the fluid. Therefore, the injected chemical does not stagnate in the fluid, it can easily adjust the reaction time and processing speed by extending or reducing the length of the pipe from the chemical injection unit 30.

In this case, the second pipe 20 may be configured to extend by a predetermined length so as to secure a sufficient area in which the chemical injection unit 30 may be installed at the position where the chemical injection unit 30 is installed (see FIG. 1). . In addition, depending on the characteristics of the fluid and the desired result, a plurality of drug injection parts 30 and 30 'may be installed in the reactor 1, wherein the installation position of each drug injection part is determined by the reaction order and speed of each drug. do.

In addition, each of the pipes 10 and 20 may be provided with various measuring means for determining the characteristics of the fluid separately from the chemical injection portion 30, the installation structure of these measuring means similar to the chemical injection portion 30 Can be configured. In the figure, as an example, the state in which the pH meter 30 "is installed in the second pipe 20. In general, pH is a very important factor in the water treatment process, and the optimum pH is determined according to the reaction type to be used in the next step. In order to maintain the pH control using acid and base is the basic. At this time, as in the present invention, if the pH meter (30 ") is installed in the pipe (10, 20) through which the fluid is continuously flowing, the conventional stirred reactor The pH can be measured more accurately in real time for a smaller amount of fluid, and the pH can be adjusted more precisely by administering a minimum amount of acid or base based on the current pH of the fluid.

In general, it is important for a reactor for reacting a fluid and a chemical to rapidly mix the fluid and a chemical to induce a uniform reaction for all fluids. In this respect, the reactor 1 of the present invention may be installed or formed with various auxiliary structures for inducing the mixing of fluids to promote the reaction, examples of which are illustrated in FIGS. 3 and 4.

The reactor 1 of the present invention has a structure in which the straight pipe 10 and the curved pipe 20 are alternately installed. In this case, the fluid passing through the conduit unit can easily induce fluid mixing by maintaining a turbulent state in the curved pipe 20, but in the straight pipe 10, the fluid may be laminar and chemical mixing may be slowed. In order to achieve this, a spiral wire guide 12 may be formed on the inner circumferential surface of the inlet portion of the first pipe 10 (see FIG. 3). The helical streamline guide 12 allows the fluid flowing into the straight first pipe 10 to rotate while being rotated by the guide 12, so that the fluid can maintain the turbulent state in the straight pipe 10. The wired guide 12 may be formed over the entire straight pipe 10, but is preferably formed only in a predetermined area around the inlet in consideration of the entire length of the pipe 10.

In addition, referring to Figure 4, the inlet of the straight pipe 10 may be provided with a fan 14 that rotates by the flow of the fluid. The fan 14 is not connected to a separate power source, and is naturally rotated by the flow of the fluid. Accordingly, the fan 14 rotates continuously as the fluid passes, and the fluid passing through the fan 14 is also induced to flow while rotating along the fan 14. In addition, the fan 14 may also serve to disperse agglomerated sludge or air bubbles in the fluid. The fan 14 is fixed to the inner wall of the pipe 10 by a separate support 15, the rotation center is preferably located in the center of the pipe (10).

Referring back to Figure 1, the reactor 1 of the present invention may be provided with a bypass tube 40 for the flow rate control of the fluid. The bypass pipe 40 may be installed at any position of the pipeline units 10 and 20, but is most preferably installed at the beginning of the reactor to adjust the flow rate throughout the reactor or to install the chemical injection unit 30. It is then used to control the dosage of chemicals. As shown in FIG. 5, the bypass pipe 40 has a configuration in which a bypass path 42 through which fluid can be bypassed is installed in the piping unit, and a valve 44 is provided in the bypass path 42. Can have. Therefore, the manager can adjust the flow rate of the fluid by opening and closing the valve 44, it is possible to adjust the stirring strength of the reactants by adjusting the flow rate.

Next, the reactor 1 of the present invention may be further provided with an air injection unit 50 for injecting fine air particles into the fluid, Figure 6 is well shown that the air injection unit 50 is installed in the pipe have. Referring to the drawings, the air injection unit 50 is preferably installed in the curved second pipe 20 in the vertical direction, and installs an diffuser 52 having a plurality of fine through holes 54 formed therein, The air inlet pipe 56 for introducing compressed air into the diffuser 52 is connected to inject compressed air from the outside.

The fine air particles exiting through the diffuser 52 of the air injection unit 50 are mixed with the mixed fluid passing at a high speed, and easily adhere to contaminants or polymer flocs contained in the mixed fluid. When air is used in a general water treatment process, how the air bubbles are formed and how long the air bubbles are held for a long time greatly affects the performance of the process. In this regard, since the reactor 1 of the present invention has a relatively low hydraulic pressure due to a high flow rate of the fluid passing around the diffuser 52, air bubbles discharged from the diffuser 52 are rapidly dispersed through the mixed fluid. Air bubbles are hardly agglomerated on the surface of the diffuser 52. That is, since the air exiting through the through hole 54 of the diffuser 52 is instantly separated from the surface of the diffuser by the flow velocity of the fluid, the air bubbles around the through hole 54 are prevented from growing.

The air injection unit 50 is installed in the lower portion of the pipeline unit, preferably the lowermost second pipe, and the air bubbles are generated to move upward through the pipes 10 and 20 along the flow direction of the fluid. do. In general, since air bubbles have a smaller specific gravity than fluids, the upward movement method of the present invention prevents air bubbles from going backward with the fluid.

In this case, as shown in FIG. 7, the pipes around the diffuser 52 may be manufactured in the form of a venturi tube 20 ′ that becomes smaller in width toward the rear of the diffuser 52. In general, the diffuser 52 is installed in the longitudinal direction of the pipe in order to increase the efficiency of air bubbles generated, wherein the air bubbles generated in the front of the diffuser 52 agglomerated with the air bubbles generated in the rear, or the air injection portion (50) Fluid flow may be stagnant due to increased air pressure at the bottom. However, when the pipe around the diffuser 52 is manufactured as a venturi tube 20 ', the flow velocity of the fluid is increased toward the rear portion of the diffuser 52, thereby preventing the air bubbles from agglomerating or stagnating. .

6 and 8, ultrasonic vibrators 58 and 58 'for vibrating fluid may be installed in the pipeline unit of the reactor 1 of the present invention. The ultrasonic vibrators 58 and 58 ′ may be installed in the inner walls of the first pipe 10 and the second pipe 20 and then installed therein, and may vibrate the fluid to disperse the agglomerated air, and air bubbles. It serves to improve the contact of flocs with. The ultrasonic vibrator 58 may be installed at any position of the pipeline unit requiring the vibration of the fluid, and in particular, as shown in FIG. 6, it is installed near the diffuser 52 of the air injection unit 50 to form fine air particles. It can be configured to help formation.

Since the pressurized pipeline reactor 1 of the present invention is a closed system unlike the conventional stirred reactor, the injected air is brought into contact with the floc while moving along the entire pipeline unit. Therefore, the pressurized pipeline reactor 1 according to the present invention can reduce energy consumption due to air loss of air and can achieve a great effect even with a small amount of air. In addition, the air aggregated during the movement of the pipe is dispersed by the ultrasonic vibrator 58 and the fan 14, and foreign matter or floc lumps are also finely broken by the fan 14 and the ultrasonic vibrator 58 and attached to the minute air bubbles. do.

In addition, in the present embodiment, the straight first pipe 10 is configured to have a diameter smaller than that of the curved second pipe 20, so that both ends of the first pipe 10 may be inserted into the second pipe 20. Can be. With this structure, the fluid flows vigorously in a wide width in the second pipe 20 where the flow of the fluid is irregular, and the fluid passes through a narrow area in the straight first pipe 10 in which the fluid is easily laminar. Maintain an active flow.

9 is a pressurized pipeline reactor 1 'according to another embodiment of the present invention. The reactor 1 'according to the present embodiment is different from the previous embodiment in the pipeline unit, but the same for the remaining parts.

In the reactor 1 'according to the present embodiment, the pipe unit has a configuration in which a plurality of linear first pipes 10' stacked up and down similarly to the previous embodiment are connected to each other by a curved second pipe 20. At this time, the first pipe 10 'is composed of a plurality of small diameter pipes. That is, two or more small diameter pipes 10 'are connected in parallel between two adjacent second pipes 20. These small diameter tubing 10 'helps fluids that pass through small diameters to mix better with the drug. In addition, various auxiliary structures as in the previous embodiment may be installed and formed in the small diameter pipe 10 ′, and a detailed description thereof will be omitted.

In addition, FIG. 9 shows a fluid inlet tube 2 for introducing a fluid, a valve 3 for adjusting a flow rate of an inflowing fluid, a fluid delivery tube 4 for discharging a fluid mixed with a chemical to the outside, and the like. Although this is not a special configuration of the present embodiment, it is applicable to the previous embodiment as it is.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

In the pressurized pipeline reactor according to the present invention configured as described above, the chemicals may be continuously and uniformly mixed in the fluid flow field by introducing the chemicals while the fluid moves in the pipeline.

In addition, as the fluid continues to flow through the conduit unit with multiple bends, the chemicals introduced into the fluid do not aggregate in one place and react almost completely with the fluid.

In addition, spiral wired guides and fans can be installed in the pipeline to deepen the flow of fluid passing through the pipeline to further promote chemical mixing.An air inlet is installed at the bottom of the pipeline unit to release fine air bubbles, thereby allowing floc in the fluid. And sludge can be removed.

In addition, a plurality of ultrasonic vibrators may be installed in the conduit unit to finely decompose bubbles and flocs, and this role is also realized by the above-described fan.

Since the pressurized pipeline reactor of the present invention is a closed system, air is not discharged into the atmosphere and is efficient.

In addition, the pressurized pipeline reactor of the present invention can be used not only in the pretreatment process but also in the advanced treatment process in the water treatment process, and is particularly effective for the advanced oxidation of organic matter using ozone. The reason is that the ozone injected into the reactor can provide sufficient mixing to completely react and to block the outflow of ozone.

In addition, the pressurized pipeline reactor of the present invention can be sufficiently applied to the microbial process that is expensive to aeration because it can reduce the energy consumption due to the air outflow in the general microbial process.

In addition, because it is configured to connect a plurality of pipes to each other, the pressure pipeline type reactor according to the present invention is very easy to install, repair and replace various parts of the chemical injection unit, ultrasonic vibrator, air injection unit, in particular of the reactor itself It is easy to change the structure, so that the shape, length, and layout of the pipeline unit can be designed and manufactured in the installation environment and the nature of the raw water.

In addition, the pressurized pipeline reactor of the present invention is easy to keep warm because it is made in the form of a pipe, the fluid heated in the inlet can maintain the elevated temperature over the entire portion of the reactor to reduce the process efficiency due to seasonal temperature drop Operation difficulties such as stopping operation can be prevented.

Claims (11)

A conduit unit stacked with a plurality of bends to induce mixing of the fluid passing therein; Pressurizing means for applying pressure to introduce fluid into the conduit unit; And Pressurized pipeline reactor, characterized in that it comprises a chemical injection portion 30 is installed in the pipeline unit for injecting the chemical into the fluid. The method of claim 1, Pressurized pipeline reactor, characterized in that the piping unit is provided with one or more ultrasonic vibrator (58) for vibrating the fluid. The method of claim 1, The conduit unit includes a plurality of straight first pipes 10 and curved second pipes 20 connecting the ends of the first pipes, The first pipeline is a pressure pipeline type reactor, characterized in that arranged to be stacked up and down. The method of claim 3, wherein At least a portion of the plurality of first pipes are made of a plurality of small diameter pipe (10 '), the pressurized pipeline reactor characterized in that two or more small diameter pipe is connected in parallel between adjacent second pipe. The method according to claim 3 or 4, Pressurized pipeline reactor, characterized in that the spiral guideline is formed on the inner peripheral surface of the inlet of the first pipe. The method according to claim 3 or 4, Pressurized pipeline reactor, characterized in that one or more fans are installed in the first pipe to rotate by the flow of the fluid. The method according to claim 3 or 4, The chemical injection unit is a pressure pipeline type reactor, characterized in that installed in the second pipe. The method of claim 7, wherein The second pipe in which the chemical injection unit is installed is a pressurized pipeline reactor, characterized in that the orifice 22 is formed in a position communicating with the chemical injection unit. The method of claim 7, wherein The chemical injection part is a pressure pipeline type reactor characterized in that the bypass pipe for adjusting the chemical injection amount is installed. The method according to claim 3 or 4, Pressurized pipeline reactor further comprises an air injection unit 50 for supplying air particles into the fluid through the diffuser 52 is installed vertically in the second pipe having fine pores. The method of claim 10, The second piping region in which the air inlet is provided is a pressurized pipeline reactor, characterized in that the width of the narrower venturi tube (20 ') consisting of.