In one embodiment, a black water processing system includes a vacuum pressure flash tank configured to separate gases from black water. The system also includes an ejector with a suction chamber and a nozzle. The suction chamber is coupled to the vacuum pressure flash tank, and the nozzle is configu
In one embodiment, a black water processing system includes a vacuum pressure flash tank configured to separate gases from black water. The system also includes an ejector with a suction chamber and a nozzle. The suction chamber is coupled to the vacuum pressure flash tank, and the nozzle is configured to discharge a motive fluid across the suction chamber to create a vacuum within the vacuum pressure flash tank.
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1. A black water processing system, comprising: a vacuum pressure flash tank configured to separate gases from black water;a high-pressure flash tank fluidly coupled to the vacuum pressure flash tank and disposed upstream of the vacuum pressure flash tank; andan ejector, comprising: a suction chambe
1. A black water processing system, comprising: a vacuum pressure flash tank configured to separate gases from black water;a high-pressure flash tank fluidly coupled to the vacuum pressure flash tank and disposed upstream of the vacuum pressure flash tank; andan ejector, comprising: a suction chamber comprising a first inlet and a second inlet;wherein the first inlet of the suction chamber is fluidly coupled to the vacuum pressure flash tank, and the second inlet comprises a nozzle fluidly coupled to the high-pressure flash tank and configured to flow a motive fluid from the high-pressure flash tank across the suction chamber to create a vacuum to draw the gases from within the vacuum pressure flash tank, wherein the motive fluid is different from the gases. 2. The black water processing system of claim 1, wherein the motive fluid comprises steam. 3. The black water processing system of claim 1, wherein the high-pressure flash tank is configured to separate the gases from the black water at a pressure greater than a vacuum pressure of the vacuum pressure flash tank. 4. The black water processing system of claim 1, wherein the motive fluid comprises an overhead discharge from the high-pressure flash tank. 5. The black water processing system of claim 1, wherein the ejector comprises only stationary parts. 6. The black water processing system of claim 1, wherein a discharge of the ejector comprises the motive fluid and the separated gases entrained in the motive fluid. 7. The black water processing system of claim 1, comprising an additional vacuum pressure flash tank configured to separate gases from the black water, wherein the suction chamber of the ejector is coupled to the additional vacuum pressure flash tank. 8. A gasification system, comprising: a high-pressure flash tank configured to separate gases from black water to produce a first discharge of the black water and a second discharge of separated gases;a vacuum pressure flash tank fluidly coupled to the high-pressure flash tank and disposed downstream of the high-pressure flash tank; andan ejector comprising a suction chamber, wherein the suction chamber comprises a first inlet and a second inlet, the first inlet is fluidly coupled to the vacuum pressure flash tank, the second inlet is fluidly coupled to the high-pressure flash tank, and a nozzle of the second inlet is configured to discharge the second discharge across the suction chamber to create a vacuum to draw a vapor discharge from the vacuum pressure flash tank through the first inlet of the suction chamber. 9. The gasification system of claim 8, wherein the second discharge comprises an absolute pressure of at least approximately 10 bar. 10. The gasification system of claim 8, wherein the vacuum comprises an absolute pressure less than approximately 0.5 bar. 11. The gasification system of claim 8, comprising a low-pressure flash tank and the vacuum pressure flash tank disposed in series with the high-pressure flash tank, wherein the low-pressure flash tank and the vacuum pressure flash tank are each configured to separate gases from the black water. 12. The black water processing system of claim 8, comprising a gasifier configured to produce a synthetic gas and the black water. 13. A gasification system, comprising: a gasifier configured to produce a synthetic gas and black water;a black water processing system fluidly coupled to the gasifier, wherein the black water processing system comprises: a high-pressure flash tank configured to flash the black water to produce a first vapor discharge of first separated gases and a first liquid discharge of the black water; anda vacuum pressure flash tank fluidly coupled to the high-pressure flash tank, wherein the vacuum pressure flash tank is configured to flash the black water to produce a second vapor discharge of second separated gases and a second liquid discharge of the black water; andan ejector comprising a suction chamber, wherein the suction chamber comprises a first inlet and a second inlet, the first inlet is fluidly coupled to the vacuum pressure flash tank, the second inlet is fluidly coupled to the high-pressure flash tank and a nozzle of the second inlet is configured to discharge the first vapor discharge across the suction chamber to pull the second vapor discharge into the ejector from the vacuum pressure flash tank through the first inlet. 14. The gasification system of claim 13, comprising a condenser configured to condense at least a portion of the second vapor discharge upstream of the ejector. 15. The gasification system of claim 13, comprising a scrubber configured to scrub the synthetic gas to produce additional black water, wherein the high-pressure flash tank is configured to flash the additional black water. 16. The gasification system of claim 15, comprising a heat exchanger configured to transfer heat from a discharge of the ejector to grey water entering the scrubber. 17. The gasification system of claim 13, wherein the high-pressure flash tank has a first absolute pressure of at least approximately 10 bar and the vacuum pressure flash tank has a second absolute pressure less than approximately 0.5 bar. 18. The gasification system of claim 13, comprising a low-pressure flash tank configured to flash the first liquid discharge to produce a third vapor discharge of third separated gases and a third liquid discharge of the black water, wherein the vacuum pressure flash tank is configured to flash the third liquid discharge. 19. The gasification system of claim 13, comprising an additional vacuum pressure flash tank configured to flash the black water to produce a fourth vapor discharge of fourth separated gases and a fourth liquid discharge of the black water, wherein the suction chamber of the ejector is coupled to the additional vacuum pressure flash tank.
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