Title:
METHOD AND APPARATUS FOR PRODUCING SLUSH NITROGEN
Document Type and Number:
WIPO Patent Application WO/2005/075352
Kind Code:
A1
Abstract:
A method for producing slush nitrogen, characterized in that it comprises spraying liquid nitrogen from a nozzle into a vessel kept under a reduced pressure with a nozzle diameter and a spraying pressure being so adjusted as for the liquid nitrogen to maintain the form of droplets, to thereby form liquid nitrogen fine particles having a uniform particle diameter and disperse them in the vessel, vaporizing nitrogen from the droplet particles during the stay thereof in the space of the vessel, to solidify liquid nitrogen particles by vaporization latent heat and form fine solid nitrogen particles having a uniform particle diameter, and mixing the solid nitrogen particles with liquid nitrogen.
Inventors:
Machida, Akito c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Hattori, Kazuhiro c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Matsuo, Kouichi c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Hattori, Kazuhiro c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Matsuo, Kouichi c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Application Number:
PCT/JP2004/001249
Publication Date:
August 18, 2005
Filing Date:
February 06, 2004
Export Citation:
Assignee:
Mayekawa Mfg, Ltd CO. (13-1, Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Machida, Akito c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Hattori, Kazuhiro c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Matsuo, Kouichi c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Machida, Akito c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Hattori, Kazuhiro c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
Matsuo, Kouichi c/o Mayekawa, Mfg Co (ltd. 13-1 Botan 2-chome Koto-k, Tokyo 46, 13500, JP)
International Classes:
B01B1/00; B01J3/00; C01B21/00; C01B21/04; F25J1/00; B01D3/06; (IPC1-7): C01B21/04; B01J3/00
Attorney, Agent or Firm:
Takahashi, Masahisa (Room 1003, Ambassador Roppongi Buildings, 16-13, Roppong, 3-chome Minato-ku Tokyo32, 10600, JP)