DUST COLLECTING FILTER, DUST COLLECTING DEVICE, AND INTAKE DEVICE OF GAS TURBINE

(19)

(11)

EP 1 447 121 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	published in accordance with Art. 158(3) EPC

(48)	Corrigendum issued on:
	10.11.2004 Bulletin 2004/46

(43)	Date of publication:
	18.08.2004 Bulletin 2004/34

(21)	Application number: 01274765.5

(22)	Date of filing: 21.11.2001

(51)	International Patent Classification (IPC)⁷: B01D 39/14, B01D 46/52, F02C 7/052

(86)	International application number:
	PCT/JP2001/010157

(87)	International publication number:
	WO 2003/043717 (30.05.2003 Gazette 2003/22)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(71)	Applicants:
	Mitsubishi Heavy Industries, Ltd. Tokyo 100-8315 (JP) Eikoh Filter Co., Ltd. Tokyo 101-0051 (JP)

(72)	Inventors:
	Katayama, Hiroyuki Mitsubishi Heavy Industries Ltd Takasago-shi,Hyogo 676-8686 (JP) Doi, Yoshiyuki, Mitsubishi Heavy Industries, Ltd. Takasago-shi, Hyogo 676-8686 (JP) Aota, Toyosei c/o Mitsubishi Heavy Industries, Ltd Takasago-shi, Hyogo 676-8686 (JP) Adachi, Tatsuo Tokorozawa-shi, Saitama 359-1161 (JP) HARA, Satoshi Sayama-shi, Saitama 350-1306 (JP)

(74)	Representative: Henkel, Feiler & Hänzel
	Möhlstrasse 37 81675 München 81675 München (DE)

(54)	DUST COLLECTING FILTER, DUST COLLECTING DEVICE, AND INTAKE DEVICE OF GAS TURBINE

(57) A large capacity HEPA filter (10) is produced in which a layered filter medium (12) unitarily formed by an upstream non-woven fabric which can remove 70 to 90 % of 0.3 µm particle and a downstream non-woven fabric which can remove 99.9 % of 0.3 µm particle or more is provided and a shape of a layered filter medium is a minipleat shape in a thickness direction and an entire shape in the thickness direction is a plurality of continuous Vs. Also, a dust collecting device having such a large capacity HEPA filter (10) is produced. An air intake device for a gas turbine is provided with such a dust collecting device.
By such an air intake device for a large capacity HEPA filter (10)/a dust collecting device/a gas turbine, it is possible to maintain a highly efficient dust collecting performance even though the device is small.