Study on the Development of Explosion-Proof Enclosures with Low Resisting Pressures for Methane Gas

DOI Web Site 7 References
  • SUZUKI Tadashi
    National Institute of Advanced Industrial Science and Technology (AIST), Institute for Geo-Resources and Environment
  • KARASAWA Hirokazu
    National Institute of Advanced Industrial Science and Technology (AIST), Institute for Geo-Resources and Environment
  • OHNO Tetsuji
    National Institute of Advanced Industrial Science and Technology (AIST), Institute for Geo-Resources and Environment

Bibliographic Information

Other Title
  • メタンガス用開放型防爆容器の試作研究
  • メタンガスヨウ カイホウガタボウバクヨウキ ノ シサク ケンキュウ

Search this article

Description

The main issues of conventional explosion-proof enclosures for methane gas, which are mainly used in coal mines, are their high cost, the difficulty of visualization of a display device, and an inaudible sound of a speaker put in them.<BR>In order to solve these issues, the authors fabricated three test vessels (8, 16 and 32 cubic cm), which have a clearance of 1.2 mm, a width of joint of 50 mm, and several total width of clearances. The materials used for fabricating them were thin steel and acryl resin plates. Methane gas explosion tests and tests for non-transmission of an internal ignition were conducted at a gas concentration of 9 and 7.5 vol. % using them. The test results revealed that all test vessels had an explosion-proof function similar to the conventional explosion-proof enclosure. In addition, it became clear that the maximum explosion pressures in the test vessels at 9 % were considerably low (about 5 to 130 kPa).<BR>From the test results, it is judged that the test vessels have the potential for solving the issues mentioned above. Because we would be able to fabricate explosion-proof enclosures with lower resisting pressures and with a wider clearance when compared to the conventional ones, using inexpensive thin steel and transparent materials.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 121 (2/3), 51-57, 2005

    The Mining and Materials Processing Institute of Japan

References(7)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top