KR101923122B1 - System for treating fine dust and harmful gas - Google Patents

Abstract

Disclosed is a fine dust and harmful gas treatment system. According to an embodiment of the present invention, the fine dust and harmful gas treatment system mixes and heats fine dust and first harmful gas generated in a flame-retardant agent with second harmful gas in the form of heated gas, thereby heating the unused part of an adhesive agent being used for coating the flame-retardant agent onto a material being discharged from a coating apparatus in order to remove the adhesive properties from the unused adhesive agent being discharged by the coating apparatus by melting the same with heated gas. The mixture of the fine dust, adhesive agent without the adhesive properties, and first and second harmful gases can flow to a scrubber collecting the particles of the same. A part of the harmful gases and particles contained in the mixture being discharged from the scrubber can be removed by a combustion treatment unit. The particles of the mixture not removed by the combustion treatment unit can be removed by a semi-dry type reactor and a back filter, thereby removing ultra-fine dust as well as the harmful gases. The temperature of the coarse particles discharged from the semi-dry reactor can be sensed in order to adjust the amount of wastewater discharged from the scrubber to be supplied to the semi-dry reactor. The temperature of purified gas including particles flowing into the back filter from the semi-dry reactor can be maintained appropriately, thereby preventing the back filter from damage.

Description

TECHNICAL FIELD [0001] The present invention relates to a fine dust and harmful gas treatment system,

The present invention relates to a fine dust and noxious gas treatment system for treating fine dust and noxious gas generated when a flame retardant is coated.

Styrofoam, a polystyrene resin foam, is widely used as a heat insulating material for insulation and cold storage, a packaging material for a product, and a cushioning material because it has excellent molding processability, heat insulating property and shock absorbing ability. However, since styrofoam is a thermoplastic resin, it is not easily melted at a high temperature due to low heat resistance, and is easily burned in a fire when a fire occurs.

Flame and noxious gas are generated during the printing of styrofoam, so styrofoam is used as flame retardant. As a method of softening styrofoam, inorganic flame retardant or organic flame retardant is coated on the surface of styrofoam. In addition, when the water-soluble resin is used as a flame retardant, the productivity is lowered.

When a non-water-soluble inorganic flame retardant is coated on a styrofoam, methanol is mixed with the flame retardant and diluted, followed by coating with styrofoam. Inorganic flame retardant flame retardants include borax-containing flame retardants.

When the flame retardant is coated on the flame-retardant material as described above, the flame retardant that is not coated on the material is discharged in the form of fine dust, and the methanol is vaporized and becomes harmful gas and discharged together with the fine dust . At this time, not only the fine dust having a diameter of 10 μm or less to be regulated but also a large amount of ultrafine dust having a diameter of 2.5 μm or less not to be regulated is contained in the discharged fine dust.

Conventionally, a combustion device or a bag filter has been used to remove fine dust and noxious gas generated in the production of a flame retardant material. However, the ultrafine dust of 2.5 占 퐉 or less is not combusted in the above combustion apparatus, and is not filtered by the bag filter, so that ultrafine dust of 2.5 占 퐉 or less can not be treated.

Prior art relating to the treatment of fine dust and noxious gas is disclosed in Korean Patent Laid-Open Publication No. 10-2016-0036719 (April 05, 2016).

It is an object of the present invention to provide a fine dust and noxious gas treatment system capable of solving all the problems of the prior art as described above.

Another object of the present invention is to provide a fine dust and noxious gas treatment system capable of removing not only fine dust including ultrafine dust but also harmful gas.

According to an aspect of the present invention, there is provided a system for treating fine dust and noxious gas according to an embodiment of the present invention. The system includes a fine dust, an unused adhesive, and a first noxious gas generated when a non-aqueous flame retardant is coated on a material, A chamber in which hot air for heating the adhesive is introduced and mixed; A scrubber for removing particles of the composite material by spraying water into the composite material mixed with fine dust, molten adhesive, first noxious gas, and hot air discharged from the chamber; A combustion processing unit for burning and removing noxious gas of the composite material discharged from the scrubber; The composite material discharged from the combustion processing unit flows into the composite material, and the discharged composite material is used to remove particles from the scrubber. Then, the discharged wastewater is supplied and injected to coarse particles of the composite material, Semi Dry Reactor (SDR); Wherein the amount of the wastewater fed to the semitransparent reactor is determined by the temperature of the coagulated particles discharged from the semitransparent reactor, Lt; / RTI >

In the fine dust and noxious gas treatment system according to the embodiment of the present invention, the fine dust and the first noxious gas generated during the coating of the flame retardant are mixed while heating the second noxious gas which is hot air. Then, among the adhesives for coating the flame retardant on the material, since the adhesive discharged from the coater is heated without being used, the unused adhesive discharged from the coater is melted by hot air to remove the adhesiveness. The composite material in which the fine dust, the adhesive removed from the adhesive, the first noxious gas and the second noxious gas are mixed flows into the scrubber to collect the particles, and the noxious gas and particles contained in the composite material discharged from the scrubber Some are removed from the combustion processing unit. Thereafter, the particles of the composite material not removed from the combustion treatment unit are removed from the semi-cylindrical reactor and the bag filter, so that not only noxious gas but also ultrafine dust can be removed.

Then, the temperature of the coarse particles discharged from the semi-automatic reactor is detected, and the amount of the wastewater discharged from the scrubber which is the liquid supplied to the semi-automatic reactor is controlled. In this case, the temperature of the clean gas including the particles flowing into the bag filter in the semi-automatic reactor can be maintained at an appropriate temperature, so that the bag filter can be prevented from being damaged.

And, since the spray plate of the semi-cylindrical reactor injects the liquid while rotating, the liquid is further finely split and injected. Then, since the contact area between the liquid and the particles of the composite material is widened, the particles of the composite material may be completely removed.

Since the waste water discharged from the scrubber is supplied to the semi-dry type reactor, the waste water can be purified in the semi-dry type reactor. Therefore, it is possible to prevent the generation of waste water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a fine dust and noxious gas processing system according to an embodiment of the present invention; FIG.
2 is a view showing the construction of a scrubber of a fine dust and noxious gas treatment system according to another embodiment of the present invention.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

It should be understood that the term "and / or" includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may include not only the first item, the second item or the third item but also two of the first item, Means a combination of all items that can be presented from the above.

It is to be understood that when an element is referred to as being "connected or installed" to another element, it may be directly connected or installed with the other element, although other elements may be present in between. On the other hand, when an element is referred to as being "directly connected or installed" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

On the other hand, when an element is referred to as being "formed, combined, or installed" with another element, it is to be understood that any element and other elements may be provided separately, formed, It should be interpreted that the other components are integrally formed as a single body.

Hereinafter, a fine dust and noxious gas treatment system according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a configuration of a fine dust and noxious gas processing system according to an embodiment of the present invention.

As shown, the fine dust and noxious gas processing system according to the present embodiment includes a chamber 110, a scrubber 120, a combustion processing unit 140, a Semi Dry Reactor (SDR) A bag filter 160, and a cooler 170. [0029]

The dust and the first noxious gas generated when the flame retardant is coated on a material such as Styrofoam in the coater may be introduced into the chamber 110. Of the adhesives for coating the flame retardant on the material, unused adhesives may be discharged from the coater together with the fine dust and the first noxious gas in the chamber 110. In addition, hot air for heating and melting the unused adhesive discharged from the coater may be introduced into the chamber 110. At this time, the fine dust, the first harmful gas, and the hot air can be mixed in the chamber 110.

The flame retardant may be water-insoluble containing borax, may be diluted by adding methanol, and then coated on the material. In this case, when the flame retardant is coated on the material in the coater, the flame retardant which is not coated on the material can be discharged in the form of fine dust, and the methanol is vaporized and becomes the first noxious gas and discharged together with the fine dust . Then, the unused adhesive may be discharged together with the fine dust and the first noxious gas.

The adhesive is adhered to the scrubber 120 and the heat accumulating member 143 of the combustion processing unit 140 and the low temperature catalyst 147 which will be described later so that the scrubber 120 and the combustion processing unit 140 are adhered to each other, . ≪ / RTI > Therefore, the adhesive property of the adhesive should be removed. Hot air is supplied to the chamber 110 to remove the adhesiveness of the adhesive, and hot air causes the adhesive to melt. Then, the adhesive property of the adhesive may be lowered or removed.

The fine dust discharged from the coater includes fine dust having a diameter of not more than 10 mu m as a target to be regulated and ultrafine dust having a diameter of not more than 2.5 mu m which is not subject to regulation.

The hot air supplied to the chamber 110 may be a high-temperature second noxious gas containing a volatile organic compound. That is, since the adhesive introduced into the chamber 110 is melted by using the second harmful gas of high temperature generated in the industrial field using the organic solvent, a separate heat source for melting the adhesive of the chamber 110 Not required. Therefore, energy can be saved.

The material discharged from the chamber 110 is a composite material mixed with fine dust, an adhesive with adhesiveness removed, a first noxious gas, and a second noxious gas which is hot air.

Particles of the composite material discharged from the chamber 110 may be removed from the scrubber 120 and the particles may include fine dust, adhesive, and foreign matter contained in the first noxious gas and the second noxious gas .

Hereinafter, the first harmful gas and the second harmful gas are referred to as noxious gas.

The scrubber 120 may include a spray nozzle 123 for spraying water and may remove particles of the composite material discharged from the chamber 110. In detail, the composite material discharged from the chamber 110 flows into the scrubber 120, and the scrubber 120 disperses the water into the composite material. Then, due to the collision of the particles with the water droplets and the contact between the water and the particles due to the diffusion of water, the particles are collected because the diameter of the particles is increased. Then, the scrubber 120 coagulates the particles by increasing the humidity, and prevents the re-scattering of the collected particles by the liquid film.

Particles of the composite material flowing into the scrubber 120 are coarse and discharged through the lower side of the scrubber 120 by their own weight, and the composite material including particles not discharged to the lower side of the scrubber 120 flows into the scrubber 120 120 and may be introduced into the combustion processing unit 140.

The adhesive that is part of the particles of the composite material is not adhered to the inner circumferential surface of the scrubber 120 because the adhesive is melted and removed.

Since borax in the water-borne flame retardant containing borax is easily dissolved by hot water, it is preferable that the water sprayed from the spray nozzle 123 is hot water at around 13 ° C which is room temperature. Then, the borax of the flame retardant discharged in the form of fine dust can be easily removed.

The water sprayed from the spray nozzle 123 may be discharged to the outside of the scrubber 120 together with the particles of the composite material, and the water discharged from the scrubber 120 may be waste water. At this time, the waste water discharged from the scrubber 120 may be supplied to the semi-dry reactor 160 and used. This will be described later.

The combustion processing unit 140 may include a body 141 having a combustion chamber 141a formed at an upper portion of the combustion chamber 141a and a hollow body formed of a ceramic material at a portion of the body 141 below the combustion chamber 141a. The heat accumulating member 143 may be provided.

The composite material discharged from the scrubber 120 may flow into the combustion chamber 141a through the heat accumulating member 143. [ The noxious gas of the composite material flowing into the combustion chamber 141a is combusted in the combustion chamber 141a, and when the noxious gas of the composite material is burnt in the combustion chamber 141a, the composite material can be in a clean state. Therefore, the composite material discharged to the outside of the combustion processing unit 140 is in a clean state. At this time, a part of particles of the composite material flowing into the combustion chamber 141a may be burned and removed.

The inside of the main body 141 provided with the heat accumulating member 143 can be divided radially into a plurality of regions with respect to the center of the main body 141 and the heat accumulating members 143 are partitioned in the divided regions. The composite material discharged from the combustion chamber 141a passes through the heat accumulating member 143 and is discharged to the outside of the body 141. The heat accumulating member 143 absorbs heat from the composite material discharged from the combustion chamber 141a and accumulates the heat .

The portion of the main body 141 provided with the heat accumulating member 143 can be divided into a region through which the composite material containing the harmful gas passes, a region through which the clean composite material passes, and a region through which the purge gas passes. The composite material containing the noxious gas, the clean composite material, and the purge gas can pass through the divided heat accumulating members 143 one by one and sequentially circulate through the divided heat accumulating members 143.

A divided heat accumulating member 143 is provided on the lower surface of the main body 141 so that the divided heat accumulating members 143 can pass through the heat accumulating members 143 partitioned by the composite material containing the noxious gas, A valve 145 may be provided to independently open and close portions of the main body 141.

The combustion processing unit 140 may be the same as or similar to the configuration of the regenerative combustion oxidizing apparatus disclosed in Korean Registered Patent Application No. 10-1560256 (Oct. 14, 2013) filed and filed by the present applicant.

The combustion processing unit 140 may further include a low temperature catalyst 147 for removing noxious gas of the composite material flowing into the body 141. The low-temperature catalyst 147 may be formed of a metal, and it is possible to remove a part of noxious gas of the composite material flowing into the main body 141, and to remove odors. The low-temperature catalyst 147 may be installed on the lower surface of the main body 141, more specifically, between the regenerating members 143 and adjacent to the lower surface of the main body 141.

The composite material discharged from the scrubber 120 may contain an adhesive agent, which is a part of the particles. However, since the adhesive agent is melted and the adhesiveness is removed, the composite material discharged from the scrubber 120 is not adhered to the heat accumulating member 143 and the low temperature catalyst 147. The composite material discharged from the combustion processing unit 140 is a clean composite material from which the adhesive is also removed.

Particles contained in the clean composite material discharged from the combustion processing unit 140 can be removed from the semitransparent reactor 150 and the bag filter 160.

The semitransparent reactor 150 injects a liquid such as water into the inflowing composite material and then dries it.

In detail, the semitransparent reactor 150 may include a spray plate 152 for spraying liquid and drying means for generating heat. Thus, the liquid is sprayed from the spray plate 152 with the composite material introduced into the semi-cylindrical reactor 150, thereby causing the particles of the composite material to be fused by the liquid. The particles of the composite material are then coarsened, and then the coarsened composite material is dried. Most of the particles of the dried composite material are discharged to the lower side of the semitransparent reactor 150 and the fine particles not removed in the semitransparent reactor 150 are introduced into the bag filter 160.

At this time, the ejection plate 152 can be rotated. Then, the liquid ejected from the ejection plate 152 can be further finely split. Then, the contact area between the liquid sprayed into the composite material and the particles of the composite material in the injection plate 152 is further widened, so that the particles of the composite material can be more completely removed.

A driving unit 154 for rotating the spray plate 152 may be installed on the outer surface of the semi-dry type reactor 150. A buffer space and a plurality of spray holes may be formed in the spray plate 152, .

The liquid supplied to the spray plate 152 of the semi-cylindrical reactor 150 may be wastewater discharged from the scrubber 120. That is, the wastewater discharged from the scrubber 120 flows into the semi-dry reactor 150 and can be used. Then, the particles contained in the wastewater discharged from the scrubber 120 can also be removed from the semitransparent reactor 150, so that the generation of wastewater can be prevented.

Fine particles that have not been removed from the semitransparent reactor 150 may enter the bag filter 160 and be removed from the bag filter 160. The bag filter 160 can collect fine particles that have not been removed from the semi-dry reactor 150 by permeating (permeating) into bag-shaped bags. The particles collected in the bag can be dropped to the lower side of the bag by the air current flowing from the outside to the inside of the bag or the vibration applied to the bag. Accordingly, the composite material discharged from the bag filter 160 is a composite material from which ultrafine particles are removed.

If the temperature of the clean gas containing fine particles flowing into the bag filter 160 in the semitransparent reactor 150 is higher than a predetermined value, the bag filter 160 may be damaged.

The fine dust and noxious gas treatment system according to the present embodiment is installed in the semi-dry reactor 150 in order to prevent the bag filter 160 from being damaged by the clean gas including fine particles discharged from the semi-dry reactor 150 The amount of wastewater discharged from the scrubber 120 can be adjusted.

A tank 131 for storing the wastewater discharged from the scrubber 120 and a sensor 133 installed at one side of the semi-dry reactor 150 for sensing the temperature of the coarse particles discharged from the semi-dry reactor 150 Can be installed.

Thus, when the temperature sensed by the sensor 133 is equal to or higher than the set temperature, a large amount of wastewater is supplied to the semi-cylindrical reactor 150 to lower the temperature of the clean gas including fine particles of the semi-cylindrical reactor 150. At this time, the amount of wastewater can be appropriately adjusted according to the temperature sensed by the sensor 133. If the temperature sensed by the sensor 133 is lower than the set temperature, the wastewater is not supplied to the semi-automatic reactor 150, and the temperature of the clean gas including fine particles in the semi-automatic reactor 150 is raised. Thus, the temperature of the clean gas including the fine particles discharged from the semi-cylindrical reactor 150 can be kept constant, so that the bag filter 160 can be prevented from being damaged.

A first valve 135 for controlling the degree of opening and closing of the channel 191 is provided in the channel 191 between the tank 131 and the semitransparent reactor 150 in order to control the amount of wastewater fed to the semi- Can be installed. The first valve 135 is controlled by the control unit, and the control unit receives the temperature signal from the sensor 133.

The composite material from which the ultrafine particles have been removed while passing through the bag filter 160 can be discharged to the atmosphere through the stack 180.

In order to prevent white smoke from being generated in the stack 180, a cooler (not shown) for removing the humid air of the composite material discharged from the bag filter 160 is provided between the bag filter 160 and the stack 180 170 may be installed. Since the humid air of the composite material discharged from the bag filter 160 is condensed and removed in the cooler 170, the composite material discharged from the cooler 170 is discharged to the atmosphere through the stack 180, And white smoke does not occur even when heat exchange is performed with the heat exchanger.

The fine dust and noxious gas treatment system according to this embodiment mixes the fine dust and the first noxious gas generated when the flame retardant is coated on the product while heating the noxious gas with the second noxious gas. Then, the adhesive of the coater discharged together with the fine dust and the first noxious gas is melted by the second harmful gas, which is the hot air, so that the adhesiveness of the adhesive is lowered or removed. Thereafter, particles of the composite material, which is a mixture of fine dust, molten adhesive, first noxious gas and second noxious gas, are removed from the scrubber 120, and particles of noxious gas and composite material that have not been removed from the scrubber 120 In the combustion processing unit (140). Then, the remaining particles of the composite material are removed in the semi-automatic reactor 150 and the bag filter 160, so that not only noxious gas but also ultrafine dust can be removed.

The temperature of the coarse particles discharged from the semi-dry reactor 150 is sensed to control the amount of wastewater discharged from the scrubber 120, which is a liquid supplied to the semi-dry reactor 150. Therefore, the temperature of the clean gas including the particles flowing into the bag filter 160 in the semi-automatic reactor 150 can be maintained at an appropriate temperature, so that the bag filter 160 can be prevented from being damaged.

The injection plate 152 of the semi-cylindrical reactor 150 injects the liquid while rotating, so that the liquid is further finely split and injected. Then, since the contact area between the liquid and the particles of the composite material is widened, the particles of the composite material can be completely removed.

FIG. 2 is a view showing the construction of a scrubber of a fine dust and noxious gas treatment system according to another embodiment of the present invention, and only differences from FIG. 1 are described.

As shown, a plurality of scrubbers 220 may be installed, and the composite material discharged from the chamber 110 (see FIG. 1) may be selectively introduced into the scrubber 220. That is, the scrubber 220 may be disposed in parallel with respect to the chamber 110 to selectively treat the composite material according to the amount of the composite material discharged from the chamber 110.

A second valve 225 may be installed in the conduit 293 between the chamber 110 and the scrubber 220 to selectively introduce the composite material discharged from the chamber 110 into the scrubber 220 .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: chamber
120: Scrubber
131: tank
133: sensor 140: combustion processing device
150: Semi-annular reactor
160: Bag filter
170: Cooler

Claims (6)

A chamber in which fine dust generated when a non-aqueous flame retardant is coated on a material, unused unused adhesive, first noxious gas, and hot air for heating the adhesive are mixed and mixed;
A scrubber for removing particles of the composite material by spraying water into the composite material mixed with fine dust, molten adhesive, first noxious gas, and hot air discharged from the chamber;
A combustion processing unit for burning and removing noxious gas of the composite material discharged from the scrubber;
The composite material discharged from the combustion processing unit flows into the composite material, and the discharged composite material is used to remove particles from the scrubber. Then, the discharged wastewater is supplied and injected to coarse particles of the composite material, Semi Dry Reactor (SDR);
And a bag filter for removing fine particles of the composite material discharged without being removed in the semi-dry reactor,
The amount of wastewater fed to the semitransparent reactor is controlled by the temperature of the coagulated particles discharged from the semi-dry reactor,
The flame retardant is borax-containing, diluted with methanol and coated on the material,
The hot air flowing into the chamber is a high-temperature second harmful gas containing a volatile organic compound,
Wherein the scrubber includes a spray nozzle for spraying water into the scrubber, wherein water sprayed from the spray nozzle has a temperature of 13 DEG C,
Wherein the semi-dry type reactor has a spray plate installed rotatably to spray wastewater. The method according to claim 1,
A tank for storing wastewater discharged from the scrubber and supplying the wastewater to the semi-dry reactor;
A sensor for sensing the temperature of the coarse particles discharged from the semitransparent reactor;
Further comprising a first valve installed in a conduit between the tank and the semitransparent reactor to adjust the degree of opening and closing of the conduit. delete delete The method according to claim 1,
Wherein a plurality of the scrubbers are installed, and the composite material discharged from the chamber is selectively introduced into the scrubber. The method according to claim 1,
Further comprising a cooler for condensing the humid air of the composite material discharged from the bag filter.

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