KR101914222B1 - System for treating fine dust and harmful gas - Google Patents

Abstract

Disclosed is a treatment system for fine dust and harmful gas. According to the present invention, the treatment system for fine dust and harmful gas mixes first harmful gas and fine dust produced during coating of a flame retardant by heating the same with second harmful gas functioning as hot air. Since an unused adhesive released from a coating machine among adhesives for coating the flame retardant to materials is heated, the unused adhesive released from the coating machine is fused by the hot air and adhesiveness is eliminated. A composite material, in which the fine dust, the adhesiveness-free adhesive, the first harmful gas, and the second harmful gas are mixed, flows into a scrubber to collect the particles, and some of the particles and harmful gas contained in the composite material released from the scrubber are removed from a combustion treatment unit. After that, particles of the composite material not removed from the combustion treatment unit are removed in a bag filter and a semi-dry reactor, thereby removing ultrafine dust as well as harmful gas. Since wastewater released from the scrubber is used after supplied to the semi-dry reactor, the wastewater can be purified in the semi-dry reactor. Accordingly, it is possible to prevent production of wastewater.

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; A Semi Dry Reactor (SDR) for introducing the composite material discharged from the combustion processing unit and injecting a liquid into the introduced composite material to remove particles of the composite material; And a bag filter for removing particles of the composite material that is not removed in the semi-dry reactor, wherein the liquid used in the semi-dry reactor is used to remove particles from the scrubber, have.

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.

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.
FIG. 2 is a view showing essential components of a fine dust and noxious gas treatment system according to another embodiment of the present invention. FIG.

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 treatment system according to the present embodiment includes a chamber 110, a scrubber 120, a combustion processing unit 130, a semi-dry reactor (SDR) 140, A bag filter 150, and a cooler 160. [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 133 of the combustion processing unit 130 and the low temperature catalyst 137 which will be described later so that the scrubber 120 and the combustion processing unit 130 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 130.

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. Waste water discharged from the scrubber 120 is used in the semitransparent reactor 140, which will be described later.

The combustion processing unit 130 may include a main body 131 having a combustion chamber 131a formed in an upper portion of the combustion chamber 131a and a hollow body formed of a ceramic material at a portion of the main body 131 below the combustion chamber 131a. The heat accumulating member 133 may be provided.

The composite material discharged from the scrubber 120 may flow into the combustion chamber 131a through the heat accumulating member 133. [ The noxious gas of the composite material flowing into the combustion chamber 131a is burned in the combustion chamber 131a, and when the noxious gas of the composite material is burnt in the combustion chamber 131a, the composite material can be in a clean state. Therefore, the composite material discharged to the outside of the combustion processing unit 130 is in a clean state. At this time, part of the particles of the composite material flowing into the combustion chamber 131a may be burned and removed.

The inside of the main body 131 provided with the heat accumulating member 133 can be divided into a plurality of regions radially with respect to the center of the main body 131 and the heat accumulating members 133 are partitioned in the respective divided regions. The composite material discharged from the combustion chamber 131a passes through the heat accumulating member 133 and is discharged to the outside of the main body 131. The heat accumulating member 133 absorbs heat from the composite material discharged from the combustion chamber 131a and accumulates the heat .

The portion of the main body 131 provided with the heat accumulating member 133 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 partitioned heat accumulation members 133 one by one and can circulate the divided heat accumulation members 133.

A divided heat accumulating member 133 is provided on the lower surface of the main body 131 so that the divided heat accumulating members 133 can pass through the heat accumulating members 133 partitioned by the composite material containing the noxious gas, A valve 135 may be provided to independently open and close portions of the main body 131.

The combustion processing unit 130 may be the same as or similar to the configuration of the regenerative combustion oxidizing apparatus disclosed in Korean Patent Registration No. 10-1560256 (Oct. 14, 2013) filed and filed by the present applicant.

The combustion processing unit 130 may further include a low temperature catalyst 137 for removing noxious gas of the composite material flowing into the main body 131. The low-temperature catalyst 137 may be formed of a metal, and may remove a part of noxious gas of the composite material flowing into the main body 131, and remove odors. The low-temperature catalyst 137 may be installed on the lower surface of the main body 131, more specifically, between the regenerating members 133 and adjacent to the lower surface of the main body 131.

The composite material discharged from the scrubber 120 may contain an adhesive agent, which is a part of the particles. However, the adhesive agent is not adhered to the heat accumulating member 133 and the low temperature catalyst 137 because the adhesive is melted and removed. The composite material discharged from the combustion processing unit 130 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 130 can be removed from the semitransparent reactor 140 and the bag filter 150.

The semi-cylindrical reactor 140 injects a liquid such as water into the inflowing composite material, and then dries it. In detail, the semitransparent reactor 140 injects a liquid into the introduced composite material so that the particles of the composite material are fused by the liquid. The particles of the composite material are then coarsened, and then the coarsened composite material is dried. Accordingly, most of the particles of the dried composite material are discharged to the lower side of the semi-cylindrical reactor 140 and fine particles not removed in the semi-cylindrical reactor 140 are introduced into the bag filter 150 .

The semi-dry type reactor 140 may include a nozzle 142 for spraying liquid and a drying means for generating heat. The semi-dry type reactor 140 receives the wastewater discharged from the scrubber 120, . Then, the particles contained in the wastewater discharged from the scrubber 120 can also be removed from the semitransparent reactor 140, so that the generation of wastewater can be prevented.

Fine particles that have not been removed from the semitransparent reactor 140 may enter the bag filter 150 and be removed from the bag filter 150. The bag filter 150 can collect fine particles that have not been removed in the semitransparent reactor 140 through (permeate) 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 150 is a composite material from which ultrafine particles are removed.

The composite material from which the ultrafine particles have been removed while passing through the bag filter 150 can be discharged to the atmosphere through the stack 170.

In order to prevent white smoke from being generated in the stack 170, a cooler (not shown) for removing the humid air of the composite material discharged from the bag filter 150 is provided between the bag filter 150 and the stack 170 160 may be installed. Since the humid air of the composite material discharged from the bag filter 150 is condensed and removed in the cooler 160, the composite material discharged from the cooler 160 is discharged to the atmosphere through the stack 170, 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 (130). Thereafter, the remaining particles of the composite material are removed in the semi-cylindrical reactor 140 and the bag filter 150, so that not only noxious gas but also ultrafine dust can be removed.

Since the wastewater discharged from the scrubber 120 flows into the semi-automatic reactor 140, the waste water discharged from the scrubber 120 can be purified in the semi-automatic reactor 140. Therefore, generation of waste water can be prevented.

FIG. 2 illustrates only the difference between FIG. 1 and FIG. 1, which shows the essential structure of the fine dust and noxious gas treatment system according to another embodiment of the present invention.

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 valve 225 may be installed in the channel 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
130: Combustion treatment device
140: Semi-annular reactor
150: Bag filter
160: Cooler

Claims (4)

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;
A Semi Dry Reactor (SDR) for introducing the composite material discharged from the combustion processing unit and injecting a liquid into the introduced composite material to remove particles of the composite material;
And a bag filter for removing particles of the composite material that is not removed in the semi-dry reactor,
The liquid used in the semitransparent reactor is wastewater discharged after being used to remove particles from the scrubber,
Flame retardants contain borax and are 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, and water sprayed from the spray nozzle has a temperature of 13 ° C. 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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