System and apparatus for condensing boil-off vapor from a liquified natural gas container

A process for condensing vapor comprising the steps of:

• providing contact area within a condenser vessel;
• directing vapor to the condenser vessel;
• providing a condensing fluid and a pump fluid;
• directing the condensing fluid to the condenser vessel;
• varying the flow of the condensing fluid to control the pressure in the vessel;
• contacting the vapor with the condensing fluid to create a condensate;
• combining the condensate and the pump fluid;
• and
• wherein the condenser vessel is utilized as a pump suction vessel.

A process for condensing vapor comprising the steps of:

• providing contact area within a condenser vessel;
• directing vapor to the condenser vessel;
• providing a condensing fluid and a pump fluid;
• directing the condensing fluid to the condenser vessel;
• varying the flow of the condensing fluid to control the pressure in the vessel;
• contacting the vapor with the condensing fluid to create a condensate;
• combining the condensate and the pump fluid;
• and
• forming a surface layer of liquid that is substantially at its saturation temperature.

A process for condensing vapor, comprising the steps of:

• providing contact area within a condenser vessel;
• directing vapor to the condenser vessel;
• providing a condensing fluid and a pump fluid;
• varying the flow of the pump fluid to control a liquid level in the vessel;
• directing the condensing fluid to the condenser vessel;
• varying the flow of the condensing fluid to control the pressure in the vessel;
• contacting the vapor with the condensing fluid to create a condensate;
• and
• combining the condensate and the pump fluid.

A process for condensing vapor comprising the steps of:

• providing contact area within a condenser vessel;
• directing vapor to the condenser vessel;
• providing a condensing fluid and a pump fluid;
• varying the flow of the pump fluid to control a liquid level in the vessel;
• directing the condensing fluid to the condenser vessel;
• varying the flow of the condensing fluid to control the pressure in the vessel;
• contacting the vapor with the condensing fluid to create a condensate;
• and
• combining the condensate and the pump fluid;
• and further wherein a surface layer of liquid in the vessel is kept substantially at its saturation temperature at the vessel operating pressure.

A process for condensing vapor comprising the steps of:

• condensing vapor in a condenser vessel to create a condensate;
• mixing the condensate with a pump fluid to create a combined stream;
• measuring a temperature difference between the condensate and the combined stream;
• utilizing the temperature difference to provide control logic for a vapor compressor.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• and
• means for combining condensed vapor with a second liquified gas stream.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• and
• means for combining condensed vapor with a second liquified gas stream;
• and
• a diaphragm plate below the vapor condensing means.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel, the control means comprising a pressure transmitter, a controller, and a valve;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• and
• means for combining condensed vapor with a second liquified gas stream.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• and
• means for combining condensed vapor with a second liquified gas stream;
• and
• wherein the vessel is adapted to receive a supply of make-up gas, and further wherein the vessel includes a make-up valve operatively connected to the control system.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• means for combining condensed vapor with a second liquified gas stream;
• and
• a control system adapted to control the second liquified gas stream, the control system comprising a liquid level transmitter, a controller, and a valve.

A vapor condenser comprising:

• a vessel;
• a liquified gas input;
• control means on the liquified gas input for varying a first liquified gas stream to control the pressure in the vessel;
• a vapor input to the vessel;
• means for condensing vapor in the vessel;
• a second liquified gas input;
• second control means on the second liquified gas input for varying a second liquified gas stream to control liquid level in the vessel;
• and
• means for combining condensed vapor with the second liquified gas stream.

A vapor condenser comprising:

• a vessel;
• means for condensing vapor in the vessel;
• control means for varying the flow of a first stream of liquified gas to control pressure in the vessel;
• means for combining the condensed vapor with a second stream of liquified gas to create a combined stream;
• means for measuring a temperature difference between the condensate and the combined stream;
• and
• means for using the temperature difference to control a vapor compressor.

A process for condensing vapor in a condenser vessel comprising the steps of:

• providing a contact area within the condenser vessel;
• directing vapor to the condenser vessel;
• providing a condensing fluid and a pump fluid;
• controlling a liquid level in the vessel;
• directing the condensing fluid to the condenser vessel;
• controlling the pressure in the vessel;
• contacting the vapor with the condensing fluid to create a condensate;
• and
• combining the condensate and the pump fluid.

A vapor condenser having controlled temperature and liquid level comprising:

• a vessel;
• a liquified gas input, the liquified gas input arranged to provide a first liquified gas stream and a second liquified gas stream;
• a vapor input;
• a pressure controller arranged to control the pressure in the vessel by varying the flow of the first liquified gas stream into the vessel;
• a contact area arranged to permit direct contact between the first liquified gas stream and the vapor within the vessel;
• a liquid level controller arranged to control a liquid level within the vessel by varying the second liquified gas stream;
• and
• means for combining condensed vapor with the second liquified gas stream.