Refrigeration – Using electrical or magnetic effect – Thermoelectric; e.g. – peltier effect
Patent
1988-08-08
1989-05-09
Warner, Steven E.
Refrigeration
Using electrical or magnetic effect
Thermoelectric; e.g., peltier effect
62 40, 62 41, F25J 100
Patent
active
048285919
ABSTRACT:
A system and a process are provided for cooling a natural gas feed to an aluminum heat exchanger to protect it from mercury damage and increase productivity. A multi-stage vaporization system is employed wherein the last stage or lowest pressure heat exchanger is provided with a propane ejector. This allows the last stage heat exchanger to operate at a very low pressure without unduly reducing the pressure within other parts of the system. The last stage heat exchanger is accordingly able to sufficiently reduce the temperature of the feed to the aluminum heat exchanger to protect against mercury contamination. In addition, the decreased heat transfer load of the aluminum heat exchanger leads to an increase in the LNG production rate.
REFERENCES:
patent: 3364685 (1968-01-01), Perret
patent: 3407052 (1968-10-01), Huntress et al.
patent: 3593535 (1969-12-01), Gaumer, Jr. et al.
patent: 4758257 (1988-07-01), Gates et al.
Predicted and Actual Temperature Profiles and Pressure Drops in Large Coil Wound, Mixed Refrigerant Heat Exchangers (1980), by J. M. Geist, et al. at LNG 6, Session 2, Apr. 7-10, 1980, Kyoto, Japan.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Warner Steven E.
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