KR200291897Y1 - Apparatus for removing voc by electromagnetic beam and adsorbent - Google Patents

Abstract

The present invention relates to a device for removing volatile organic compounds using an electron beam and an adsorbent. The present invention provides an adsorbent for increasing molecular activity of pollutants by an electron beam irradiated from the top of the reactor and repeatedly adsorbing contaminants under an electron beam atmosphere. Accordingly, an object of the present invention is to provide a device for removing volatile organic compounds using an electron beam and an adsorbent such that residual electrons by the electron beam may act on contaminant molecules on the adsorbent surface.

The present invention is formed on the side and the bottom of each of the inlet and outlet pipes for the introduction and discharge of various harmful gases, there is a support network in which a plurality of small sphere-shaped adsorbents are seated therein, the electron beam is irradiated on the top A device for removing volatile organic compounds using an electron beam and an adsorbent, wherein a transparent titanium irradiation window is attached so that residual electrons of the irradiated electron beam can be decomposed again to various harmful gas molecules adsorbed to the adsorbent. The electron beam irradiated from the upper part of the removal device to which the electron beam is irradiated increases the molecular activity of the noxious gas, and under the electron beam atmosphere, the contaminants are repeatedly desorbed in the lower layer inside the removal device, so that the remaining electrons from the electron beam are released to other energy. Reacts to pollutant molecules on the adsorbent surface without converting As it is characterized in that to improve the efficiency of removal of noxious gases.

The present invention can be applied to not only large-scale facilities such as petrochemical processes, coating processes, paint plants, oil refineries, sewage treatment plants and waste combustion treatment plants, which emit various harmful gas substances such as volatile organic compounds, odors, or dioxins. Even small facilities using energy can be very effective in removing the hazardous gaseous materials and are very economical because they consume relatively little energy to remove pollutants.

Description

Volatile organic compound removal device using electron beam and adsorbent {APPARATUS FOR REMOVING VOC BY ELECTROMAGNETIC BEAM AND ADSORBENT}

The present invention relates to a device for removing volatile organic compounds using an electron beam and an adsorbent, and more particularly, to remove contaminants by providing a plurality of adsorbents capable of adsorbing volatile organic compounds and various harmful gases in a reactor to which an electron beam is irradiated. The present invention relates to an apparatus for removing volatile organic compounds using an electron beam and an adsorbent.

As is well known, the structure of the emission source is changing due to the advancement of the industry and the increase in the use of automobiles and various coating materials, and accordingly, the types of air pollutants are also diversified.

In particular, volatile organic compounds (VOCs) have long been treated as air pollutants with harmful effects on human health and the environment. Volatile organic compounds (VOCs) are very diverse and widespread, with thousands of chemicals. They are also highly flammable and can cause safety accidents caused by fire explosions.

VOCs include organic compounds including BTEX (bezene, toluene, ethylbenzen, xylene) and PCE, TCE, CHC, halogenated and non-halogenated chlorine, accounting for the majority of VOC compounds. It is a compound with high chemical reactivity and carcinogenicity, which is absolutely required for regulation and economic control method is urgently needed.

In addition, volatile organic compounds (VOCs) are known as pollutants that are highly mobile and cause odors in the atmosphere, as well as are highly anesthetic. In addition, since it has potential toxicity and carcinogenicity, and ozone is formed by photochemical reaction with nitric oxide and other compounds, environmental pollution caused by these is of particular interest.

In order to solve the above problems, each workplace has been struggling with the selection and application of appropriate prevention technologies, and above all, economic feasibility and safety of the workplace.

First of all, volatile organic compounds emitted from painting and petrochemical facilities account for almost all of the volatile organic compounds, except for the exhaust gas generated by automobile operation. Is absolutely necessary recently.

However, since there are many kinds of volatile organic compounds emitted from these facilities, it is technically difficult to control them all with the same method and facility. Therefore, materials having similar physical and chemical properties are selected and controlled according to their characteristics. Is required.

Since the combustion method is operated at a high temperature in the prior art, the THERMAL NOx may be generated and carbon dioxide (CO 2), which is a greenhouse gas, is generated.

In addition, there is a problem in that additional cleaning facilities need to be installed additionally when treating the halogen compound, it costs a lot of fuel.

In the catalytic oxidation method, the application range is limited depending on the properties of the gas to be treated. The life of the catalyst is about 3-5 years, which requires a catalyst exchange and a high facility cost.

On the other hand, the adsorption technology gradually decreases the adsorption capacity according to the regeneration time of the adsorbent. Therefore, the cost of the adsorbent needs to be changed frequently. Also, the pretreatment system requires the filtration of particulate matter. The disadvantage is the increased cost.

Recently, the method of removing contaminants using electron beams has been introduced. The method of removing contaminants using electron beams is dry at room temperature, so it is expected that a secondary wastewater treatment facility is not required. medium. The situation is applied only to large-capacity facilities. If a pollutant removal device using an electron beam is used in a small structure, research on various methods to increase the efficiency must be preceded.

The present invention was made in view of the above-described prior art, and increases the molecular activity of pollutants by the electron beam irradiated from the upper part of the reactor, and provides an electron beam by providing an adsorbent in the reactor to desorb the pollutants repeatedly in an electron beam atmosphere. It is an object of the present invention to provide a device for removing volatile organic compounds using an electron beam and an adsorbent, in which residual electrons from the target can act on contaminant molecules on the adsorbent surface.

In addition, the present invention also provides another secondary reactor containing only the adsorbent between the outlet and the reactor discharged after the reaction in the reactor irradiated with the electron beam to further improve the removal efficiency of contaminants. Include.

Figure 1a is a perspective view showing a volatile organic compound removal device using an electron beam and an adsorbent according to an embodiment of the present invention,

Figure 1b is a side cross-sectional view showing a volatile organic compound removal device using an electron beam and an adsorbent according to an embodiment of the present invention,

Figure 2a, 2b is the effect of applying the electron beam and the adsorbent at the same time at 2.5kgy using the volatile organic compound removal device using the electron beam and the adsorbent according to an embodiment of the present invention, the effect of only the electron beam, the effect of the adsorbent only Graph,

3A and 3B are graphs showing the effect of applying the electron beam and the adsorbent at the same time at 5kGy dose, the effect of the electron beam only, and the effect of the adsorbent only,

Figure 4a, 4b is a graph showing a comparison of the state of the electron beam irradiation and the state of the electron beam irradiation after a short time adsorption using a volatile organic compound removal device using an electron beam and an adsorbent according to an embodiment of the present invention,

5 is a graph illustrating a state in which an electron beam and an adsorbent are applied to an adsorbent saturated with a predetermined amount of a volatile organic compound using an volatile organic compound removing apparatus using an electron beam and an adsorbent according to an embodiment of the present invention;

6 is a side cross-sectional view showing an apparatus for removing a volatile organic compound using an electron beam and an adsorbent according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: removal device, 110: accelerator,

120: frame, 120a: reflective member,

122: inlet pipe, 124: outlet pipe,

130: adsorbent, 200: auxiliary removing device.

In order to achieve the above object, according to a preferred embodiment of the present invention, the inlet pipe and the outflow pipe which is introduced and discharged various harmful gases are formed on the side and the lower surface, respectively, a plurality of small sphere-shaped adsorbents therein The support network is settled, and a transparent titanium irradiation window is attached to the upper part to irradiate the electron beam, so that the remaining electrons of the irradiated electron beam can be decomposed again to various harmful gas molecules adsorbed to the adsorbent. An apparatus for removing volatile organic compounds using an electron beam and an adsorbent is provided.

Preferably, one end of the outlet tube constitutes a tube extending with the outlet tube, and the other end of the tube is coupled to the inlet of the auxiliary removal apparatus seated therein a plurality of small-spherical adsorbents therein, which is not decomposed in the removal apparatus. It is characterized in that to remove the polluted gas secondary adsorption.

More preferably, there is provided an apparatus for removing volatile organic compounds using an electron beam and an adsorbent, wherein the adsorbent is supported by an adsorbent catalyst to increase its adsorption efficiency.

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

Hereinafter, the present invention will be described briefly with reference to the present invention, the present invention forms a small amount of adsorbent layer on the lower predetermined portion of the electron beam irradiation reactor to adsorb toxic organic substances and toxic gas substances such as various polluting gases, It is to improve the removal efficiency of contaminants by causing the material to be decomposed and desorbed at about the same time by irradiation of the electron beam.

That is, the volatile organic compounds introduced into the reactor are decomposed by the electron beam primarily irradiated, exposed to the electron beam, and then immediately passed through the adsorbent layer without being discharged to the outside.

At this time, the volatile organic compound is adsorbed into the pores of the adsorbent and is secondarily irradiated to the electron beam while passing through the adsorbent layer. The secondary irradiated material is more easily decomposed because the electrons generated by the accelerator are irradiated, and the unreacted electrons which do not react after the reaction in the reactor are not immediately consumed and the adsorbent in the bottom layer of the reactor. It is characterized in that the energy generated by irradiating the layer is used almost 100%. This reactor structure maximizes utilization efficiency by inducing the generated electrons to participate in the reaction without being consumed by thermal energy.

When the present invention using this principle is applied, it can be seen that the decomposition efficiency is remarkably improved as compared with the case of simply irradiating an electron beam to harmful gas substances such as volatile organic compounds.

Hereinafter, the volatile organic compound removal device and method for an embodiment of the present invention in detail.

1A is a perspective view showing a volatile organic compound removing device using an electron beam and an adsorbent according to an embodiment of the present invention, Figure 1B is a volatile organic compound removing device using an electron beam and an adsorbent according to an embodiment of the present invention It is a side cross-sectional view shown.

Referring to this, the volatile organic compound removing device 100 according to the present invention provides a cylindrical closed frame 120, the upper surface of the frame 120 is an electron beam irradiation window (not shown) made of titanium alloy The inner circumferential surface of the frame 120 is provided with a reflecting member 120a so that the electron beam can be easily reflected.

In addition, an electron beam accelerator 110 for irradiating an electron beam to a position spaced a predetermined distance from the upper surface of the electron beam irradiation window is provided.

On the other hand, the inlet pipe 122 through which the volatile organic compound flows is formed in a predetermined portion of the outer peripheral side of the frame 120, and the outlet pipe 124 through which the volatile organic compound flows out is formed in the predetermined portion.

In addition, an adsorbent support net 128 for seating the adsorbent 130 at a position spaced a predetermined distance from the bottom surface of the frame 120 is configured, and at the edge of the support net 128 from the frame 120 An annular support protrusion 126 protruding therein is formed to fix the support net 128 at a predetermined height.

At this time, the adsorbent 130 is described. As an example of the adsorbent 130, the gaseous activated carbon has a large specific surface area and a small diameter pore structure, and has a high adsorption affinity for low concentration gas. In addition, since its surface is hydrophobic, its adsorption affinity to water vapor is low, and harmful gas substances such as volatile organic compounds and odors mixed in air can be efficiently removed. Activated charcoal co-exists with a portion where irregularly dispersed fine crystals of graphite structure and a methylene ring portion. In addition, the internal pore structure is developed to have a distinctly large specific surface area of 3,000㎡ / g.

When activated carbon is in contact with a solid surface in a fluid phase for a long time, certain components of the fluid phase are collected on the solid surface and the concentration of the inside of the fluid phase is different from that of the solid surface. This phenomenon is adsorption, where the relationship between the concentration in the fluid phase and the solid surface concentration is equilibrated if the chemical potential of the phase is appropriate and a relation called Adsorption Equilibrium Relation is established. .

In addition, this relationship is much influenced by temperature. Adsorption on activated carbon is carried out by the following principle. Activated carbon particles have a dual structure of micropores (2 nm or less) that dominate the adsorption and macropores (several micrometers) formed as a gap between the microparticles. The diameter of the granular activated carbon is several mm, and since the adsorbate molecules reach and reach the adsorption point inside the particles, the adsorption takes place through various paths. One of them is a series diffusion which is moved by diffusion into the fluid filling the macropores and diffuses and adsorbs within the micropores. Another type of diffusion is surface diffusion, which moves on the surface inside the adsorbent to the adsorption point adjacent to the adsorbed molecules.

Hazardous gases such as volatile organic compounds adsorbed by this principle are decomposed by electron beam irradiation. In addition, since the electron beam irradiation increases the kinetic energy of the molecules themselves, the adsorbed molecules are repeatedly irradiated by the electron beam and decomposed secondaryly, while the desorption from the surface of the adsorbent is repeated.

That is, the volatile organic compounds introduced through the inlet pipe 24 are primarily decomposed by the electron beam irradiated from the upper part of the frame 120, and desorbed by the adsorbent 130 seated on the support net 128. Repeatedly concentrated and secondary decomposition is carried out again by the electron beam, and the residual gas from which the volatile organic compound is removed is discharged through the outlet pipe 124.

At this time, when the volatile organic compound is intermittently adsorbed and concentrated by the adsorbent 130, when the electron beam is irradiated from the top, the decomposition efficiency of the volatile organic compound is higher.

That is, the electrons generated by the accelerator are irradiated so that the unreacted unreacted electrons are not immediately consumed after being reacted in the reactor and are irradiated to the adsorbent 130 in the bottom layer of the reactor so that the generated electron energy is used almost 100%. It is. The structure of the volatile organic compound removal device 120 is to maximize the utilization efficiency by inducing the generated electrons to participate in the reaction, not consumed as thermal energy.

Figure 2a, 2b is the effect of applying the electron beam and the adsorbent at the same time 2.5kgy dose simultaneously using the electron beam and the volatile organic compound removal device using the adsorbent according to an embodiment of the present invention, the effect of only the electron beam, the effect of the adsorbent only It is a graph shown.

Referring to this, at a low absorption dose of 2.5 kGy, the removal efficiency by electron beam irradiation is very low. The reactor of the actual size applied to the treatment facility has little effect of temperature increase because the electron beam is irradiated only to the reactor irradiation window and does not affect the outer wall of the reactor, but the lab scale reactor has the outer wall of the reactor because the electron beam is irradiated to the reactor itself. The temperature of the metal rises. The temperature rises inside the reactor due to the effect of the temperature rise, thereby affecting the adsorbent 130.

When the effect of the adsorbent 130 was only tested, the experiment was performed at the same experimental temperature in consideration of the influence of this temperature.

The adsorbent 130 reaches a breakthrough point when the adsorption proceeds and reaches saturation. In this experiment, the amount of adsorbent and the concentration of adsorbent substrate were maintained to reach the breakthrough point for the adsorbent, and it was investigated whether the same breakthrough point was reached when the electron beam was irradiated with the adsorption layer under the same conditions.

First, when observing the state of the adsorption only by the adsorption, the removal by the adsorption at the initial inlet concentration is made, but because the amount of the adsorbent 130 is a small amount of saturation within a short time tends to decrease the adsorption capacity, It can be seen that the removal rate rapidly decreases over time. At this time, since the amount of activated carbon used is a small amount and the temperature is elevated, it can be seen that the concentration rises in a short time.

However, when the electron beam is irradiated in a state where a small amount of the adsorbent 130 is present, as shown in the graph, the removal efficiency is improved by 30% in benzene and 40% in toluene as compared to the removal efficiency by electron beam only. It can be seen that.

In addition, in the case where only the adsorbent 130 is applied, the saturation state is achieved over time, whereas when the electron beam is irradiated with the adsorbent 130, the saturation is not achieved and the characteristics of maintaining a constant improved removal efficiency are shown. Can be.

Benzene, which has a relatively low G-value, requires relatively high energy for complete decomposition when electron beam irradiation is applied. However, when the electron beam is irradiated with the adsorbent layer below, the energy efficiency can be significantly increased.

3A and 3B are graphs showing the effect of applying the electron beam and the adsorbent at the same time at 5 kGy dose, the effect of the electron beam only, and the effect of the adsorbent only.

Referring to this, the amount of the adsorbent 130 is increased to compare the effect of adsorption, the effect of the electron beam, and the simultaneous effect of the adsorbent and the electron beam. The removal efficiency due to the irradiation of the electron beam is 5 kGy rather than the 2.5 kGy absorbed dose. It shows better removal characteristics in dose.

On the other hand, when the electron beam irradiation (5kGy) is made in the state where the adsorbent 130 is present, as shown in the graph, the removal efficiency is improved by 30% for benzene and 25% for toluene than the removal efficiency by electron beam only. Indicates. In practice, there is little effect of temperature on electron beam irradiation in the reactor. Therefore, the actual process proceeds at a low temperature, the removal efficiency is further increased.

In addition, when the experimental results of the adsorbent 130 are compared with the results of the electron beam irradiation in the presence of the adsorbent, both maintain a constant concentration without showing a saturation tendency of the adsorbent 130 as time passes.

As a result of verification through these experiments, it can be seen that the effect of removing various harmful gases is more enhanced when the electron beam is irradiated in the presence of the adsorbent 130 rather than the irradiation of the electron beam alone.

4A and 4B are graphs showing the state of the electron beam irradiation and the state only by the electron beam irradiation after the adsorption for a short time using the volatile organic compound removing apparatus using the electron beam and the adsorbent according to the embodiment of the present invention.

Referring to this, when the adsorption and the irradiation of the electron beam are made at the same time, after reaching a certain concentration, the adsorption, decomposition, and desorption are in equilibrium so that the concentration is kept constant, whereas after the adsorption by the adsorbent 130, the electron beam is first In the case of irradiation, the desorption rate of the adsorbed substrate adsorbed on the activated carbon increased as the electron beam was irradiated, and the concentration increased because the desorption rate was larger than the adsorption and decomposition rate.

However, even in this case, the concentration of the adsorption, decomposition rate and desorption rate is balanced again with time.

5 is a graph illustrating a state in which an electron beam and an adsorbent are applied to an adsorbent saturated with a certain amount of a volatile organic compound by using a device for removing a volatile organic compound using an electron beam and an adsorbent according to an embodiment of the present invention.

Referring to this, in the case of the adsorbent 130 saturated to a certain concentration by adsorption of volatile organic compounds, a large amount of adsorbed volatile organic compounds begins to be decomposed and desorbed as the electron beam is irradiated.

At this time, since the desorption rate is much higher than the adsorption and decomposition rate, the concentration shows a sharp rise, but as time passes, the concentration of volatile organic compounds decreases as the decomposition rate and desorption rate gradually goes to equilibrium. It becomes visible. That is, when the electron beam is simultaneously irradiated to the adsorbent 130 actually used, it can be seen that the adsorbent 130 is not saturated by the volatile organic compound even after a long time.

Therefore, the adsorbent 130 used with the electron beam is sufficiently reusable. Hereinafter, an embodiment in which the reuse of the adsorbent 130 and the removal efficiency of the volatile organic compound are further improved will be described in detail with reference to FIG. 6.

6 is a side cross-sectional view showing an apparatus for removing a volatile organic compound using an electron beam and an adsorbent according to another embodiment of the present invention.

Referring to this, another embodiment of the present invention provides an auxiliary removal device 200 for performing a secondary removal operation for the material that is primarily reacted through the volatile organic compound removal device 100. .

The auxiliary removing device 200 has the same configuration as the volatile organic compound removing device 100 described above, but in the case of the auxiliary removing device 200, the configuration of the electron beam irradiation window made of titanium (Ti) is unnecessary. It is not necessary to attach the reflecting member 120a to the inner circumferential surface thereof. Therefore, even if the reference numerals are different, the description of the components having the same shape and function will be omitted.

The auxiliary removing device 200 forms an adsorbent 230 therein, and introduces the gas discharged from the outlet pipe 124 into the inside through the inlet pipe 222 through the tube 240. Then, the remaining components of the volatile organic compounds that have not been removed in the gas are removed by using the adsorbent 230 formed therein.

At this time, the adsorbent 230 provided in the auxiliary removing device 200 is exchanged with the adsorbent 130 provided in the volatile organic compound removing device 100 at regular intervals. That is, the adsorbent 130 provided in the volatile organic compound removing device 100 is separated from the surface of the volatile organic compound adsorbed by the electron beam, so that the adsorbent 230 provided in the auxiliary removing device 200 is saturated. It is desirable to exchange and reuse at.

More preferably, an adsorbent catalyst such as titanium oxide (TiO ₂ ) or aluminum oxide (Al ₂ O ₃ ) is supported on the adsorbent 130 used to remove volatile organic compounds to improve the removal efficiency. It is also possible to do so.

On the other hand, the volatile organic compound removal device using the electron beam and the adsorbent according to the embodiment of the present invention is not limited only to the above embodiments, various modifications can be made within the scope not departing from the technical gist.

As described above, the apparatus for removing volatile organic compounds using an electron beam and an adsorbent according to the present invention is a petrochemical process, a painting process, a paint factory, an oil refinery, sewage, which discharges various harmful gas substances such as volatile organic compounds, odors or dioxins. As well as large-scale facilities such as terminal treatment plants and waste-fired treatment plants, small-scale facilities that use less energy can effectively remove the harmful gaseous substances and are very economical because they consume relatively little energy to remove pollutants.

In addition, by providing an auxiliary removal device, which is a Safty Zone at the rear of the removal device, the secondary removal is very environmentally friendly.

Claims (3)

Inflow and outflow pipes are provided on the side and the bottom of each harmful gas inflow and outflow, respectively, and a support network in which a plurality of small-spherical adsorbents are seated therein is provided so that the electron beam can be irradiated thereon. A device for removing volatile organic compounds using an electron beam and an adsorbent, wherein a transparent titanium irradiation window is attached so that residual electrons of the irradiated electron beam can be decomposed again to various harmful gas molecules adsorbed on the adsorbent. 2. The removal apparatus according to claim 1, comprising a tube extending at one end of the outlet tube and extending to the outlet tube, and incorporating an inlet of an auxiliary removal apparatus having a plurality of small-spherical adsorbents seated therein at the other end of the tube. Volatile organic compound removal device using an electron beam and an adsorbent, characterized in that to remove by adsorbing undecomposed polluted gas in the secondary. The apparatus of claim 1, wherein the adsorbent is supported by an adsorbent catalyst to increase the adsorption efficiency thereof.