26th National Symposium on Cryogenics and Superconductivity

22-24 February 2017

VECC

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Design and Development of Helium Gas Purifier

Content:

Helium being the inert gas with lowest boiling point, offers great research potential. However, as one of the rare gases, it is considerably expensive and needs to maintain its purity for research applications. The helium purification is based on two principles, cryocondensation of moisture and air impurities on heat exchangers at appropriate temperatures and the cryosorption on activated charcoal to yield 99.995% pure helium from 5% impure helium at LN2 temperature and at high pressure of about 42 bar. The present work deals with the design of helium purifier system with impurity upto 5% by running a 50 hours continuous operation with the volume flow rate of 90 Nm3/hr. Moisture collector vessel, two heat exchangers, liquid air separator vessel and an adsorber column serve as the prime components of the system, while gas bag, compressor, LN2 vessel and cylinder manifold are considered as secondary components, all are housed in superinsulated LN2 vessel. Purification of helium involves regeneration phase and purification phase. For complete removal of moisture from charcoal beds, regeneration is done before purification, by heating and evacuation with purging of pure helium from the whole system. In purification phase, 95% of pure helium and 5% of impurity is assumed.

Id:

Place:

VECC

1/AF, Bidhan Nagar Kolkata - 700008

Room: Hall B (Annex Auditorium)

Starting date:

22-Feb-2017

15:15 (Asia/Kolkata)

Duration:

15'

Contribution type:

Contributory Talk

Primary Authors:

Mr. DIXIT, Avadhoot (Veermata Jijabai Technological Institute, Mumbai, India)

Co-Authors:

Prof. KULKARNI, Swati (Veermata Jijabai Technological Institute, Mumbai, India)
Dr. TENDOLKAR, Mandar (Veermata Jijabai Technological Institute, Mumbai, India)
Mr. SRINIVASAN, K V (Tata Insttute of Fundamental Research, Mumbai, India)

Presenters:

Mr. DIXIT, Avadhoot

Material:

paper

slides

Included in session:

Technical Session 3

Included in track:

Air / Gas Separation / Purification