Methods and apparatus for cleaning a vessel

An apparatus, comprising:

• a first vessel, comprising:
• an interior volume defined by sidewalls, a top surface, and a bottom surface, wherein the sidewalls extend upwards from the bottom surface to the top surface;
• a first inlet port disposed at the top surface, and comprising a first valve;
• a first inlet tube connected to the first inlet port, wherein the first inlet tube extends into the interior volume of the first vessel;
• a first outlet tube extending from the top surface towards the bottom surface;
• and
• a first outlet port disposed outside the interior volume of the first vessel and on the top surface, wherein the first outlet port is connected to the first outlet tube and comprises a second valve;
• a second vessel, comprising:
• an interior volume defined by sidewalls, a top surface, and a bottom surface;
• a second inlet tube connected to the first outlet tube via the first outlet port;
• a second outlet port comprising a third valve;
• and
• a third outlet port fluidly connected to the interior volume of the second vessel and disposed at the bottom surface of the second vessel, and comprising a fourth valve;
• a vacuum pump connected to the third valve;
• a liquid pump fluidly connected downstream of the fourth valve;
• and
• a solid particle counter disposed between the first outlet port and the second inlet tube.

An apparatus, comprising:

• a first vessel, comprising:
• an interior volume defined by sidewalls, a top surface, and a bottom surface, wherein the sidewalls extend upwards from the bottom surface to the top surface;
• a first inlet port disposed at the top surface, and comprising a first valve;
• a first inlet tube connected to the first inlet port, wherein the first inlet tube extends into the interior volume of the first vessel;
• a first outlet tube extending from the top surface towards the bottom surface;
• and
• a first outlet port disposed outside the interior volume of the first vessel and on the top surface, wherein the first outlet port is connected to the first outlet tube and comprises a second valve;
• a second vessel, comprising:
• an interior volume defined by sidewalls, a top surface, and a bottom surface;
• a second inlet tube connected to the first outlet tube via the first outlet port;
• a second outlet port comprising a third valve;
• and
• a third outlet port fluidly connected to the interior volume of the second vessel and disposed at the bottom surface of the second vessel, and comprising a fourth valve;
• a vacuum pump connected to the third valve;
• and
• a liquid pump fluidly connected downstream of the fourth valve,
• wherein the first inlet tube comprises a plurality of nozzles pointing toward the bottom surface of the first vessel.