Patent ID: 8257509

Claim:
A method of removing buildup in cryogenic equipment, the method comprising: a. closing a first exit valve, a second inlet valve, and a second exit valve of a pumping vessel; b. opening a first inlet valve of the pumping vessel, wherein the first inlet valve controls the supply of a solvent into the pumping vessel; c. closing the first inlet valve of the pumping vessel upon reaching a predetermined maximum solvent level within the pumping vessel; d. opening the second inlet valve of the pumping vessel to re-pressurize the pumping vessel with a process gas; e. opening the first exit valve of the pumping vessel upon re-pressurization of the pumping vessel; f. continuously operating the second inlet valve to maintain a predetermined pressure level within the pumping vessel; g. delivering the solvent from the pumping vessel into the cryogenic equipment via the first exit valve; h. closing the first exit valve of the pumping vessel upon reaching a predetermined minimum solvent level in the pumping vessel; i. closing the second inlet valve of the pumping vessel; j. opening the second exit valve of the pumping vessel, wherein opening the second exit valve of the pumping vessel decreases the pressure within the pumping vessel; k. continuously measuring the pressure level and the solvent level within the pumping vessel, wherein measuring indicators continuously monitor the pressure level and the solvent level by continuously delivering readings of the pressure level and the solvent levels to an automated control system; and l. repeating steps (a)-(j) until the buildup in the cryogenic equipment is removed.