Abstract:
An ammonia stripper (32) and method for stripping ammonia from ammonia-containing water is described, comprising an ammonia-containing water inlet (56), a steam inlet (70), and a forced air inlet (82), and an ammonia-containing gas outlet (36) and a wastewater outlet (72). The steam and air contact the ammonia-containing water in counter-flow to release ammonia from the ammonia-containing water. The ammonia stripper further comprises a steam and air mixing duct (200) shaped to create turbulence in the steam and air flow to promote mixing of the steam and air flow prior to contacting the ammonia-containing water. Also described is an ammonia stripper and method comprising a precipitation unit for precipitating solids from the ammonia-containing water prior to the inlet, and an ammonia stripper and method comprising a steam flash vessel for generating steam from the wastewater produced by the ammonia stripper for recycling into the ammonia stripper. Further described are thermal destructors for destroying ammonia in ammonia-containing gas from an ammonia stripper; and a method of removing ammonia from ammonia-containing gas wherein ammonia-containing gas is drawn from the ammonia-containing gas outlet and returned into the ammonia stripper to mix with the forced air entering the ammonia stripper.
Abstract:
A shale shaker includes a basket having a front, solids discharge end and a rear, feed end spaced apart by opposed first and second sides. The basket includes a lower, first, screen deck and an upper, second, screen deck directly above the first screen deck. The screening surfaces of the screen decks are spaced apart, by a vertical spacing of from 20 mm to 250 mm. There is a cavity above the feed receiving end of the first screen deck, in direct fluid communication with the space between the screening surfaces of the first and second screen decks ( ) that only receives feed that has passed through the upper, second, screen deck. The cavity extends to higher than the extreme end of the screening surface of the second screen deck, at its feed receiving end.
Abstract:
The present invention discloses methods and systems for problem-alert aggregation and identifying sub-optimal behavior. Methods include the steps of: providing data-driven alerts for an asset, wherein the data-driven alerts associate real-world data measured and/or detected from the asset, and wherein entities are physical objects and/or processes; providing an asset representation including interrelations between the objects, processes, and sensors associated with the entities of the asset; associating the data-driven alerts with the respective entities which are interrelated in the asset representation; aggregating the data-driven alerts into events, wherein the events are groupings of related data-driven alerts having related entities according to the asset representation; scoring each event into an event score, wherein the event score represents an event importance, an event urgency, an event relevance, and/or an event significance; and generating a selected subset of the events and respective event scores, wherein the selected subset is based on the event scores.
Abstract:
A system for removing ammonia from landfill leachate comprising an economizer for producing high pressure hot water in a hot water circuit from heat exchange with a hot gas stream carrying waste heat; a boiler which is heated by the high pressure hot water to produce steam; and an ammonia stripper. The ammonia stripper has a leachate inlet connected to a leachate flow path, and an ammonia containing gas outlet. A leachate discharge outlet is connected to a leachate discharge flow path, and a steam inlet is provided which is connected to the boiler by a conduit. At a lower end of the ammonia stripper there is a forced air inlet. A randomly packed bed located between the upper end and the lower end. In use there is a flow of steam and air in one direction and of leachate in the opposite direction which releases ammonia from the leachate.
Abstract:
The invention provides a process and apparatus for the separation of nitrogen from a gaseous feed comprising a mixture of hydrocarbons and nitrogen gas, the process comprising the steps of: (i) cooling and at least partially condensing the gaseous feed; (ii) feeding the cooled and at least partially condensed feed from step (i) to a first fractionation to produce an overhead vapour stream having an enriched nitrogen content and a condensed product having a reduced nitrogen content which is subjected to a second fractionation, which comprises reboil, at a lower pressure than the first fractionation; (iii) partially condensing the overhead vapour stream, and separating to provide a liquid stream, which is used to provide reflux to the first fractionation, and a separated vapour stream, which is condensed to provide reflux to the second fractionation; and (iv) sub-cooling the condensed product of the first fractionation and dividing the resulting sub-cooled product into at least two streams: a first stream being expanded and fed to the second fractionation, and a second stream being expanded and reheated in heat exchange with the separated vapour stream from step (ii) before being fed to the second fractionation; (v) removing a hydrocarbon product stream low in nitrogen from the second fractionation; and (vi) removing a nitrogen rich stream from the second fractionation.
Abstract:
A mobile concentration system (MCS) for milk comprising: a vehicle having a holding tank for receiving and holding milk; and a concentration system mounted to the vehicle and coupled in fluid communication with the holding tank. The concentration system adapted to remove milk from the holding tank and process the milk while the vehicle is stationary and/or uploading or unloading of milk, or underway. The concentration system including a reverse osmosis filtration system adapted receive the milk from the holding tank and process the milk to generate a stream of substantially water and a product stream of concentrated milk. A feed section comprises product/water/CIP (clean in place) valving systems, high pressure pumping equipment operating to receive and pressurize the milk through-out the system. A concentration level control system includes a control valve regulating the concentrate flow to achieve a fixed system operating pressure to control the system. A method of collecting and concentrating milk from the concentration system comprising: under pressure, depositing milk into a holding tank; drawing milk from the holding tank while the vehicle is stationary and/or uploading or unloading of milk, or underway and directing the milk to the concentration system carried by the vehicle; and operating the concentration system while the vehicle is stationary and/or uploading or unloading of milk, or underway to remove water from the milk by reverse osmosis filtration system in combination with the concentration level control system.
Abstract:
A screen system 8 suitable for use in a vibratory screen apparatus 1, comprising: a screen element 11 consisting essentially of a mesh panel 19 provided with first and second elongate support members 22, 23 extending along opposite end portions 20, 21; and a support frame 12 therefore. The support frame 12 has spaced apart first and second elongate frame elements 13, 14 for engagement with said screen element support members 22, 23 and further elongate frame elements 17, 18 extending between the first and second frame elements 13, 14 for supporting the mesh panel 19. The support frame 12 is provided with at least one mesh panel support 27 provided with an elevating support surface, which tensions the screen element 11 across the support surface 27 and between the screen element support members 22, 23. The latter 22, 23 and the first and second frame elements 13, 14 are being formed and arranged for secure interengagement. At least one of the screen element support members 22, 23 and the respective one of the first and second frame elements 13, 14 is formed and arranged so that when the screen element 19 is tensioned by the mesh panel support 27 with the support surface thereof elevated, the mesh panel 19 is securely held under tension and the screen element support members 22, 23 are driven into securely gripped interengagement with the frame elements 13, 14.
Abstract:
A process and equipment for extracting and disposing of sour reservoir components initially contained in natural hydrocarbons. The stream of natural hydrocarbons extracted from a reservoir is initially subjected to an optional gas/liquid separation. The gaseous hydrocarbons are then scrubbed with a liquid absorbent to dissolve sour reservoir components such as hydrogen sulphide and carbon dioxide and thereby form a solution. The liquid absorbent may be water that is preferably sufficiently free of oxygen and solids to be of a quality suitable for re-injection. The solution is pumped back into a well. The well may be the reservoir that produced the hydrocarbons, or adjacent geological formations, with the re-injected sour water being employed for production stimulation. Alternatively, the well may be a depleted reservoir. The scrubber may be a multiple-stage packed column or tray column that preferably allows for condensate skimming.
Abstract:
A process for leaching copper and arsenic from copper dross containing copper arsenide and separated from molten lead bullion comprises leaching the dross with an aqueous ammoniacal solution containing arsenate as the predominant anion under oxidizing conditions to obtain a leachate, removing copper from the leachate to obtain a raffinate and re-cycling raffinate to the leaching stage, and removing a bleed of raffinate from the circuit and precipitating a substantially insoluble arsenic compound from the raffinate bleed to remove arsenic from the circuit.
Abstract:
An electrical capacitance tomography (ECT) system for determining, in use, a distribution of a fluid in a vessel is described which comprises a plurality of electrodes disposed in or about the vessel; and a processor operably coupled to the electrodes and being configured to determine from outputs therefrom, by an ECT method, the distribution of fluid in the vessel wherein at least some of the plurality of electrodes are mesh electrodes. Aspects of the invention provide such an apparatus and methods of carrying out tomography including such electrodes and methods of constructing a system. The electrodes are more robust and lighter than electrodes previously used enabling the use in space applications.