KR101805026B1 - System for treating fine dust and harmful gas capable of preventing discharge of waste water - Google Patents

Abstract

Disclosed is a system for treating fine dust and harmful gas. According to the present invention, the fine dust and harmful gas treating system includes a process of mixing the fine dust and first harmful gas generated in a flame retardant agent coating operation with second harmful gas at a high temperature. An adhesive agent used to coat the flame retardant agent on a material is heated and melts after being discharged from a coating apparatus, thereby losing the adhesive property. When a mixture of the fine dust, first harmful gas, adhesive agent without the adhesive property, and the second harmful gas flows into a cyclone unit, the cyclone unit sprays water to remove the particles from the mixture. The remaining particles in the mixture are removed in a medium filter. The harmful gas and untreated particles of the mixture are partially removed in a combustion treatment unit. The particles of the mixture not treated in the combustion treatment unit can be removed in a semi-drying type reactor and a back-filter, thereby removing ultrafine dust as well as the harmful gas. The wastewater discharged from the cyclone unit is used in the semi-drying type reactor to prevent generation of wastewater.

Description

TECHNICAL FIELD [0001] The present invention relates to a fine dust and harmful gas treatment system capable of preventing the discharge of waste water,

The present invention relates to a fine dust and noxious gas treatment system capable of preventing discharge of wastewater 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 the present invention, comprising: fine dust, an unused adhesive agent, a first noxious gas, and an adhesive agent generated when a flame retardant is coated on a material; A chamber in which hot air for heating is introduced and mixed; A cyclone for removing particles of the composite material by spraying water with the composite material mixed with fine dust, molten adhesive, first harmful gas, and hot air discharged from the chamber; A medium filter for passing the composite material discharged from the cyclone to collect and remove particles of the composite material and deodorizing the odor of the composite material; A combustion processing unit for burning and removing noxious gas of the composite material discharged from the medium filter; A Semi Dry Reactor (SDR) for spraying water discharged from the cyclone to the composite material discharged from the combustion processing unit to coarse particles of the composite material, drying the particles, and removing 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.

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. Then, when the composite material mixed with the fine dust, the adhesive removed from the adhesive, the first harmful gas and the second harmful gas is introduced into the cyclone, particles of the composite material are removed while spraying water from the cyclone, The particles of the composite material are removed from the medium filter. Then, the noxious gas of the composite material and a part of the untreated particles are removed in the combustion processing unit. Thereafter, the particles of the composite material not removed in the combustion treatment unit are removed from the semitransparent reactor and the bag filter, so that it is possible to remove not only noxious gas but also ultrafine dust.

Since the waste water discharged from the cyclone is used in the semi-dry type reactor, it is possible to prevent the generation of waste water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a fine dust and noxious gas processing system according to an embodiment of the present invention; FIG.
2 is a schematic diagram of the cyclone and medium filter shown in Fig.
3 is a schematic view of the combustion processing unit shown in Fig.
4 is a schematic view of the semitransparent reactor and the bag filter shown in Fig. 1;

The meaning of the terms described herein 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 to another 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.

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 block diagram showing the 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 cyclone 120, a medium filter 140, a combustion processing unit 150, a semi-dry reactor (SDR) A dry reactor 160, and a bag filter 170.

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 contain borax and may be water-insoluble. If the flame retardant is water-insoluble, methanol may be added to dilute and then coated onto 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 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 adhesive is adhered to the cyclone 120, the medium filter 140 and the heat accumulating member 153 of the combustion processing unit 150 and the low temperature catalyst 157 to be described later, and the cyclone 120, The medium filter 140 and the combustion processing unit 150 can be damaged. 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 hot air supplied to the chamber 110 may be supplied to the chamber 110 to lower or remove the adhesiveness of the adhesive, and the hot air supplied to the chamber 110 may be the second harmful gas including the 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 in which fine dust, a first noxious gas, an adhesive removed from the adhesive, and a second noxious gas that is a hot air are mixed.

Particles of the composite material exiting the chamber 110 may be removed from the cyclone 120 and the medium filter 140. At this time, the particles may include fine dust, an adhesive, and a foreign substance 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 cyclone 120 and the medium filter 140 will be described with reference to Figs. 1 and 2. Fig. 2 is a schematic view of the cyclone and medium filter shown in Fig.

As shown, the cyclone 120 may remove particles of the composite material exiting the chamber 110. The cyclone 120 may be formed in a substantially conical shape, and the composite material may flow upward into the cyclone 120 and descend while rotating along the inner circumferential surface of the cyclone 120. The particles of the composite material are discharged to the outside through the lower side of the cyclone 120 due to their own weight and include the particles that are not discharged to the lower side of the cyclone 120 while the airflow swirls upward at the substantially lower end side of the cyclone 120 The composite material can be discharged to the outside of the cyclone 120.

An injection part 130 for injecting water from the upper side to the lower side of the cyclone 120 is provided on the upper part of the cyclone 110 in order to more easily remove the particles of the composite material flowing into the cyclone 120 from the chamber 110. [ Can be installed. When the jetting part 130 injects water into the cyclone 120, particles of the composite material of the cyclone 120 become wet by water, so that the weight of the composite material particles of the cyclone 120 becomes heavy. Then, the particles of the composite material of the cyclone 120 are easily dropped to the lower side of the cyclone 120, so that particles of the composite material of the cyclone 120 can be more easily removed.

The adhesive that is a part of the particles of the composite material is not adhered to the inner circumferential surface of the cyclone 120 because the adhesive is melted and removed. Since the borax in the flame retardant containing borax is easily melted by hot water, it is preferable that the water injected from the jetting unit 130 is hot water at around 15 ° C, which is room temperature, and a plurality of cyclones 120 can be installed have.

The water jetted from the jetting section (130) is discharged from the cyclone (120). That is, in the cyclone 120, waste water is discharged. The waste water discharged from the cyclone 120 may be supplied to a semi-cylindrical reactor 160 to be described later.

The composite material discharged from the cyclone 120 may contain particles that are not removed from the cyclone 120 and particles of the composite material discharged from the cyclone 120 may be removed from the medium filter 140. The medium filter 140 can collect and remove the particles contained in the composite material discharged from the cyclone 120, and can smell the odor of the composite material.

The composite material discharged from the cyclone 120 may contain an adhesive agent, which is a part of the particles, but is not adhered to the medium filter 140 because the adhesive is melted to remove adhesiveness.

Part of the harmful gas and particles of the composite material discharged from the medium filter 140 can be removed from the combustion processing unit 150. The combustion processing unit 150 will be described with reference to Figs. 1 and 3. Fig.

As shown in the figure, the combustion processing unit 150 may include a body 151 having a combustion chamber 151a formed in an upper portion of the combustion chamber 151a. A heat accumulating member 153 of a hollow body may be installed.

The composite material discharged from the medium filter 140 may flow into the combustion chamber 151a through the heat accumulating member 153. [ The noxious gas of the composite material flowing into the combustion chamber 151a is burnt in the combustion chamber 151a, and when the noxious gas of the composite material is burnt in the combustion chamber 151a, the composite material can be in a clean state. Therefore, the composite material discharged to the outside of the combustion processing unit 150 is in a clean state. At this time, a part of particles of the composite material flowing into the combustion chamber 151a may be burned and removed.

The inside of the main body 151 provided with the heat accumulating member 153 can be divided into a plurality of regions radially with respect to the center of the main body 151 and the heat accumulating members 153 are partitioned in the divided regions. The composite material discharged from the combustion chamber 151a passes through the heat accumulating member 153 and is discharged to the outside of the main body 151. The heat accumulating member 153 absorbs heat from the composite material discharged from the combustion chamber 151a and accumulates the heat .

The portion of the main body 151 provided with the heat accumulating member 153 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 harmful gas, the clean composite material, and the purge gas can pass through the divided heat accumulating members 153 one by one and sequentially circulate through the divided heat accumulating members 153.

A divided heat accumulating member 153 is installed on the lower surface of the main body 151 so that the regenerating member 153 can sequentially pass through the heat accumulating members 153 partitioning the composite material containing the noxious gas, the clean composite material, and the purge gas A valve 155 may be provided to independently open and close portions of the body 151.

The combustion processing unit 150 may be the same as or similar to the configuration of the regenerative combustion oxidizing apparatus disclosed in Korean Patent Registration No. 10-1560256 (October 16, 2015).

The combustion processing unit 150 according to the present embodiment may further include a low temperature catalyst 157 for removing noxious gas of the composite material flowing into the main body 151. The low-temperature catalyst 157 may be formed of metal, and may remove a part of harmful gas of the complex material flowing into the main body 151, and may remove odors. The low-temperature catalyst 157 may be installed on the lower surface of the main body 151, more specifically, between the regenerating members 153 and adjacent to the lower surface of the main body 151.

The composite material discharged from the medium filter 140 may contain an adhesive agent, which is a part of particles, but is not adhered to the low temperature catalyst 157 because the adhesive is melted and the adhesiveness is removed. The composite material discharged from the combustion processing unit 150 is a clean composite material from which the adhesive is also removed.

Most of the clean composite material discharged from the combustion processing unit 150 flows into the semitransparent reactor 160 and part of it can be discharged to the atmosphere through the stack 180. The composite material discharged from the semi- It may be introduced into the combustion processing unit 150 and re-burned depending on the water used. This will be described later.

Particles contained in the clean composite material discharged from the combustion processing unit 150 can be removed from the semitransparent reactor 160 and the bag filter 170. The semitransparent reactor 160 and bag filter 170 will be described with reference to Figs. 1 and 4. Fig.

As shown, the semitransparent reactor 160 injects water after the composite material flows, and then dries the water. In detail, the semitransparent reactor 160 injects water into the inflowing composite material so that the particles of the composite material are fused by the water. The particles of the composite material are then coarsened and the coarsened composite material is dried. Part of the dried composite material is discharged to the lower side of the semitransparent reactor 160 and the fine particles not removed in the semitransparent reactor 160 are introduced into the bag filter 170.

The semitransparent reactor 160 may include a nozzle 162 for injecting liquid and may include separate drying means for drying the composite material.

Fine particles that have not been removed from the semitransparent reactor 160 may enter the bag filter 170 and be removed from the bag filter 170. The bag filter 170 can collect fine particles that have not been removed in the semi-automatic reactor 160 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 170 is a composite material from which ultrafine particles are removed.

If the water discharged from the cyclone 120 is supplied to the semitransparent reactor 160, the waste water discharged from the cyclone 120 may not be discharged to the outside.

On the other hand, if water discharged from the cyclone 120 is supplied to the semitransparent reactor 160, the composite material discharged from the semitransparent reactor 160 may contain harmful substances. Therefore, when the water discharged from the cyclone 120 is supplied to the semi-dry type reactor 160, the composite material discharged from the bag filter 170 is re-introduced into the combustion processing unit 150 and burned. ). ≪ / RTI > Then, the harmful substances contained in the composite material discharged from the semi-dry reactor 160 are burned and removed, so that the harmful substances can be prevented from being discharged to the atmosphere.

When the composite material discharged from the bag filter 170 passes through the semitransparent reactor 160 and is discharged through the stack 180 after being combusted in the combustion processing unit 150, A portion of the clean gas may also be discharged through the stack 180.

If the water supplied to the semi-automatic reactor 160 is clean water, the composite material discharged from the semi-dry reactor 160 does not contain harmful substances. In this case, a cooler is installed between the bag filter 170 and the stack 180, then the wet steam contained in the composite material discharged from the bag filter 170 is removed from the cooler, .

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 are removed from the cyclone 120 while spraying water with a composite material that is a mixture of fine dust, molten adhesive, first noxious gas, and second noxious gas. After the particles of the composite material not removed from the cyclone 120 are removed from the medium filter 140, the combustion processing unit 150 removes a part of the noxious gas and untreated particles of the composite material. Then, the remaining particles of the composite material are removed in the semi-cylindrical reactor 160 and the bag filter 170, so that not only noxious gas but also ultrafine dust can be removed.

Since the waste water discharged from the cyclone 120 is used in the semi-dry type reactor 160, the generation of waste water can be prevented.

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: Cyclone
130:
140: medium filter
150: Combustion treatment device
160: Semi-annular reactor
170: bag filter

Claims (5)

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 cyclone for removing particles of the composite material by spraying water with the composite material mixed with fine dust, molten adhesive, first harmful gas, and hot air discharged from the chamber;
A medium filter for passing the composite material discharged from the cyclone to collect and remove particles of the composite material and deodorizing the odor of the composite material;
A combustion processing unit for burning and removing noxious gas of the composite material discharged from the medium filter;
A Semi Dry Reactor (SDR) for spraying water discharged from the cyclone to the composite material discharged from the combustion processing unit to coarse particles of the composite material, drying the particles, and removing 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 cyclone is provided with a jetting portion for jetting water into the cyclone,
The water jetted from the jetting section is water at room temperature,
Wherein the composite material discharged from the bag filter is re-introduced into the combustion processing unit and burned, and then discharged to the atmosphere through the stack. The method according to claim 1,
The flame retardant is borax-containing, diluted with methanol and coated on the material,
Wherein the hot air flowing into the chamber is a high-temperature second harmful gas including a volatile organic compound. delete delete The method according to claim 1,
The combustion processing unit includes:
A low temperature catalyst for removing noxious gas of the composite material flowing into the combustion processing unit;
Further comprising a heat accumulating member for absorbing heat of the discharged composite material when the noxious gas of the composite material passed through the low temperature catalyst is discharged after being burned.

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