직물 망사를 이용한 내구성이 우수한 고효율 필터에 관한 연구 = A Study of highly increased durability filters with Mesh

다국어 초록 (Multilingual Abstract)

Filter bags, a type of medium filters, are widely used in many types of facilities and industries these days because of their efficiency of filtering effect even with simple and cost-effective installations. However, the current filters with needle-punching process in the market have short life cycles because of high temperature and high speed gases emitted from the chambers specially in complex types of power plants.
Accordingly the need of filter bags with longer life cycle has been rising and therefore it is studied here if the life cycle of them can be prolonged.
The proper fiber ratio of polyester fiber, PPS and low melting fiber has been checked firstly to make sure of enough Air Permeability and Mullen Burst. To increase the strength of the filter more while its permeability remains the same at least mesh type has been applied to the non-woven with needle-punching process.
It is obvious that the needle-punching process is another important factor for this study after checking the speed and the combination of its impact on filters. In short, fiber ratio, mesh and the way of needle-punching are the major factors for filters to have higher strength that leads to longer life cycles for better environment while filters still maintain the enough permeability for filtration. Further studies about the effects by different sizes of dust on the filters would be necessary.

국문 초록 (Abstract)

최근 미디엄 필터의 한 가지인 백필터(Filter Bag)는 설치 비용 대비 높은 포집 효율의 이유로 여러 산업 분야에서 두루 쓰이고 있다. 하지만 현재의 Needle-Punching 공정으로 만들어진 필터들은 복합발전소 등에서 배출되는 고온, 고압의 분출 가스로 인해 강한 풍속을 견디지 못하고 쉽게 파손되는 등 매우 짧은 사용수명을 가진다.

따라서 오래 쓸 수 있는 고효율, 고강도의 필터에 대한 필요성이 대두되고 있으며 본 논문에서 해당 필터의 사용수명을 높일 수 있는지를 연구하였다. 폴리에스터 파이버, PPS와 Low Melting Fiber의 적절한 사용 비율 차이가 공기 투과도나 파열강도에 미치는 영향을 우선 실험하였다. 또한, 필터의 강도를 높이면서 기존의 공기 투과도를 유지하기 위해서 망사를 Needle-Punching 공정에서 동시에 투입하여 작업하는 것을 연구하였다.

Needle-Punching 공정을 연구한 결과, 공정의 작업 속도와 Combination이 또 다른 중요한 요소임을 알 수 있었다. 따라서 파이버의 비율, 망사와 Needle-Punching 공정 방법이 필터의 공기투과 및 여과 기능을 유지하면서 고강도, 고효율의 효과를 낼 수 있는 작업에 중요한 요소이며 실험 결과 망사가 포함된 필터가 파열강도가 개선됨을 확인할 수 있었고 포집 효율도 오히려 증가함을 알 수 있었다.

목차 (Table of Contents)

• 제1장. 서론 ····························································1
• 제2장. 이론적 배경 ··················································3
• 2.1 필터의 필요성 ·················································3
• 2.2 필터의 종류 ····················································4
• 2.3 필터의 집진 원리 ·············································7
• 2.4 원재료에 대한 고찰 ··········································7
• 2.4.1 저융점 파이버(Low Melting Fiber) ·············7
• 2.4.2 PPS(Polyphenylene Sulfide) ······················8
• 2.5 필터의 필요 특성 ··············································9
• 2.5.1 공기 투과도 ················································9
• 2.5.2 압력손실 ·····················································9
• 2.5.3 MERV(Minimum Efficiency Reporting Value) ····9
• 2.5.4 포집 효율 ····················································11
• 2.5.4.1 중량법 ···················································11
• 2.5.4.2 비색법 ····················································11
• 제3장. 연구 내용 및 실험 ·············································12
• 3.1 파이버 혼합 비율에 따른 백필터의 물성 분석 시험 ··13
• 3.2 직물 망사 종류에 따른 백필터의 물성 분석 시험 ······18
• 3.3 Needle-Punching 공정 분석에 관한 실험 ···············22
• 3.4 최종 개선된 백필터 물성 비교 ································27
• 제4장. 결론 ·································································31
• Abstract (요약) ···························································32
• 참고문헌 ·····································································33