# US 2021/0277795 A1 · Collection system for a gas turbine engine wash assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277795 A1 - Document ID: US20210277795A1 - Status: Published application - Kind: A1 - Application number: 16/338,871 - Filed: 2016-10-04 - Published: 2021-09-09 - Earliest claimed: 2016-10-04 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Peng Wang - Web page: https://patentgrep.com/patent/US20210277795A1 ## CPC - B08B 3/02: Cleaning by the force of jets or sprays - F01D 25/002: {Cleaning of turbomachines} - B01D 19/0052: {in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused (B01D19/0026 takes precedence)} - B08B 3/14: Removing waste, e.g. labels, from cleaning liquid - B08B 5/04: Cleaning by suction, with or without auxiliary action - B08B 9/00: Cleaning hollow articles by methods or apparatus specially adapted thereto - B08B 17/025: {Prevention of fouling with liquids by means of devices for containing or collecting said liquids} - B64F 5/30: Cleaning aircraft - B08B 2203/0229: Suction chambers for aspirating the sprayed liquid - B08B 2215/00: Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR ## Abstract A wastewater collection system of a water wash system includes a collection duct configured to attach to a gas turbine engine for receiving a mixture of air and wash liquid from the gas turbine engine during washing. The wastewater collection system additionally includes a separation assembly, the separation assembly including a shaft, one or more impellers mounted to the shaft, and a casing. The casing at least partially encloses the shaft and encloses the one or more impellers. The casing defines an inlet for fluidly connecting with the collection duct, an air outlet, and a liquid outlet. The air outlet is disposed opposite the one or more impellers from the inlet and the liquid outlet. ## Claims ### Claim 1 A waste water collection system of a water wash system for a gas turbine engine, the collection system comprising: a collection duct configured to attach to the gas turbine engine for receiving a mixture of air and wash liquid from the gas turbine engine during washing; and a separation assembly comprising a shaft; one or more impellers mounted to the shaft; and a casing at least partially enclosing the shaft and enclosing the one or more impellers, the casing defining an inlet for fluidly connecting with the collection duct to receive a mixture of air and wash liquid, an air outlet, and a liquid outlet, the air outlet disposed opposite the one or more impellers from the inlet and the liquid outlet. ### Claim 2 (depends on 1) The collection system of claim 1, wherein the separation assembly defines an axial direction, and wherein the shaft extends along and rotates about the axial direction. ### Claim 3 (depends on 2) The collection system of claim 2, wherein the axial direction substantially aligns with a vertical direction. ### Claim 4 (depends on 2) The collection system of claim 2, wherein the casing comprises a body defining a substantially cylindrical shape, wherein the body defines an inner diameter, wherein the one or more impellers define an effective impeller diameter, and wherein the inner diameter the body is less than about 20% greater than the effective impeller diameter. ### Claim 5 (depends on 2) The collection system of claim 2, wherein the one or more impellers includes a plurality of first stage impellers and a plurality of second stage impellers, wherein the plurality of first stage impellers are spaced from the plurality of second stage impellers along the axial direction. ### Claim 6 (depends on 1) The collection system of claim 1, wherein the shaft defines an airflow passage extending between a first opening and a second opening and through the air outlet of the casing, and wherein the first opening is disposed opposite the one or more impellers from the inlet and the liquid outlet. ### Claim 7 (depends on 1) The collection system of claim 1, wherein the casing comprises a body defining a substantially cylindrical shape extending between a first end and a second end, wherein the separation assembly further comprises a first bearing and a second bearing, wherein the first bearing rotatably attaches the shaft to the casing proximate the first end of the body, and wherein the second bearing rotatably attaches the shaft to the casing proximate the second end of the body. ### Claim 8 (depends on 1) The collection system of claim 1, wherein the shaft and the one or more impellers are driven by an airflow from the inlet defined by the casing to the air outlet defined by the casing. ### Claim 9 (depends on 1) The collection system of claim 1, wherein the casing of the separation assembly comprises an inlet flange defining the inlet, and wherein the inlet flange is oriented towards the one or more impellers. ### Claim 10 (depends on 1) The collection system of claim 1, wherein the casing of the separation assembly comprises an inlet flange defining the inlet, wherein the separation assembly defines an axial direction, and wherein the inlet flange is oriented substantially perpendicular to the axial direction. ### Claim 11 (depends on 1) The collection system of claim 1, further comprising: a waste water duct in fluid communication with the liquid outlet defined by the casing. ### Claim 12 A liquid and air separation assembly for a waste water collection system of a water wash system, the waste water collection system including a collection duct for attachment to a gas turbine engine for receiving a mixture of air and wash liquid from the gas turbine engine during washing, the separation assembly comprising: a shaft; one or more impellers mounted to the shaft; and a casing at least partially enclosing the shaft and enclosing the one or more impellers, the casing defining an inlet for fluidly connecting with the collection duct to receive a mixture of air and wash liquid, an air outlet, and a liquid outlet, the air outlet disposed opposite the one or more impellers from the inlet and the liquid outlet. ### Claim 13 (depends on 12) The separation assembly of claim 12, wherein the separation assembly defines an axial direction, and wherein the shaft extends along and rotates about the axial direction. ### Claim 14 (depends on 13) The separation assembly of claim 13, wherein the axial direction substantially aligns with a vertical direction. ### Claim 15 (depends on 13) The separation assembly of claim 13, wherein the casing comprises a body defining a substantially cylindrical shape, wherein the body defines an inner diameter, wherein the one or more impellers define an effective impeller diameter, and wherein the inner diameter the body is less than about 20% greater than the effective impeller diameter. ### Claim 16 (depends on 13) The separation assembly of claim 13, wherein the one or more impellers includes a plurality of first stage impellers and a plurality of second stage impellers, wherein the plurality of first stage impellers are spaced from the plurality of second stage impellers along the axial direction. ### Claim 17 (depends on 12) The separation assembly of claim 12, wherein the shaft defines an airflow passage extending between a first opening and a second opening and through the air outlet of the casing, and wherein the first opening is disposed opposite the one or more impellers from the inlet and the liquid outlet. ### Claim 18 (depends on 12) The separation assembly of claim 12, wherein the casing comprises a body defining a substantially cylindrical shape extending between a first end and a second end, wherein the separation assembly further comprises a first bearing and a second bearing, wherein the first bearing rotatably attaches the shaft to the casing proximate the first end of the body, and wherein the second bearing rotatably attaches the shaft to the casing proximate the second end of the body. ### Claim 19 (depends on 12) The separation assembly of claim 12, wherein the shaft and the one or more impellers are driven by an airflow from the inlet defined by the casing to the air outlet defined by the casing. ### Claim 20 (depends on 12) The separation assembly of claim 12, wherein the casing of the separation assembly comprises an inlet flange defining the inlet, and wherein the inlet flange is oriented towards the one or more impellers.