133 results about "Pressure exchanger" patented technology

An optimal thermal seawater desalination process is disclosed, which combines two or more substantially different water pretreatment processes in a unique manner and in a special configuration, hereto unknown to prior desalination arts, to produce a high yield of high quality fresh water, including potable water. In this process a two stage NF membrane pretreatment unit (NF₂) with an energy recovery turbo charger (TC) device in between the stages or equipped with an energy recovery pressure exchanger (PX) is synergistically combined with at least one thermal desalination unit to form a dual hybrid of NF₂-Thermal (FIG. 4 ), or alternatively the two stage NF₂ unit is synergistically combined with a two stage SWRO unit (SWRO₂) with an energy recovery TC in between the stages or combined with one stage SWRO (SWRO₁) equipped with an energy recovery TC or PX system and the reject from the SWRO₂ or SWRO₁ unit is made make-up to a thermal unit to form a tri-hybrid of NF₂-SWRO_{2 reject}-Thermal (FIG. 5 ). In both the cases of di- or trihybrids the thermal unit is equivalent to a multistage flash distillation (MSFD) or multieffect distillation (MED) or vapor compression distillation (VCD) or thermal reheat (RH) evaporator. Typically a process of this invention using the two stage NF₂ initial pretreatment step will perform a semi-desalination step by reducing feed TDS by about 35 to 50%, but most important, especially to the thermal seawater desalination process, it removes the water recovery limiting, scale forming hardness ions of Ca⁺⁺ and Mg⁺⁺ by better than 80% and their covalent anions of sulfate to better than 95% and bicarbonate to about 65%. The removal of scale forming hardness ions, especially SO₄⁼, and bicarbonates allowed for the operation of thermal unit in the above hybrids at top brine temperature (TBT) much greater than its present TBT limit by the singular conventional process of 120° C. for MSFD and operation of MED or VCD or RH unit at TBT much higher than their present TBT limit of 65-70° C., with many advantages gained by this process over prior art sweater desalination processes. The process of this invention exceeds all prior thermal seawater desalination arts in efficiency, including water yield, product water recovery ratio and unit water cost as well as in energy consumption per unit product which is equivalent or less than other efficient prior art seawater thermal desalination processes. By this process, an NF product recovery ratio of 75 and 80% or better is achieved from the high salinity Gulf sea (TDS≈45,000 ppm) and about an equal product recovery ratio is also obtained from the SWRO or thermal unit when it is operated on NF product for a total water recovery ratio in excess of 52% for seawater

A pressure exchanger for transferring pressure from a higher pressure liquid in a first liquid system to a lower pressure liquid in a second liquid system having a housing (8) with inlet and outlet connection openings (10-10.3) for each liquid and a rotor (1) arranged in the housing for rotation about a longitudinal axis. The rotor has a plurality of through channels (13) arranged around the longitudinal axis with openings (12) on axial end faces (2, 3) of the rotor. The rotor channels (13) are connected to the connection openings (10-10.3) through flow openings (11-11.3) in the housing such that during rotation of the rotor high pressure liquid and low pressure liquid are alternately supplied to the respective systems. A predominantly axially extending flow transition is formed between the flow openings (11-11.3) in the housing and the openings (12) of the rotor channels (13), and the flow openings in the housing form part of curved cavities (19) with each cavity (19) simultaneously covering several rotor channel openings (12) and having a shape which equilibrates the liquid flow speed in the vicinity of the housing flow openings (11-11.3). External surfaces (5-5.3) of the rotor (1) have an energy converting or energy transmitting configuration (6), and a partial flow (TS) of high pressure and/or flow energy impinging on the configuration (6) produces rotation of the rotor (1). A regulator (7) the varies the amount of the partial flow (TS) and the rotational speed of the rotor (1) and controls the rotational speed of the rotor for substantially shock-free admission of the mass flow into the rotor channels (13).

A pumping machine, that can serve a system as the sole main pump for pressurizing a primary liquid flow, incorporates, in a single machine, a rotor-drum type AP (axial piston) pump and a PX (pressure exchanger) that recovers energy from a secondary liquid flow such as the brine discharge from an RO seawater desalination system, with benefits including fewer moving parts and small machine size along with lower capital and operating costs. A single rotor-drum containing the cylinders and pistons is located between two end blocks, one or both configured with manifold passageways, ports and sliding valves. A swash-plate at one end reciprocates the pistons axially when the rotor-drum is rotated. Two working chambers, primary and secondary, are formed at opposite ends of a single piston in each cylinder, thus enabling the single rotor-drum to function as a primary liquid-pressurizing axial pump (AP) with sliding valves at the primary end enabling primary liquid pumping, and as a secondary outflow-driven pressure exchanger (PX) recovering energy from pressure drop in the secondary liquid flow and thus contributing work to primary pumping, saving energy and reducing operating costs.

A pressure exchanger for transferring pressure energy from a relatively high-pressure fluid stream to another relatively low-pressure fluid stream is provided. A ducted rotor is positioned on a central axle between two end covers inside a pressure vessel with a coaxial inlet and outlet pair that is in communication with a pair of low pressure ports having inclination forming an inlet tangential velocity vector in the direction of rotor rotation and an outlet tangential velocity vector in opposite direction imparting a rotational momentum on rotor. A pair of high-pressure ports is adapted for flow without inclination and imparts no momentum to rotor and flow can be varied without impacting the rotor's RPM. The end covers have a sloped surface following a flat sealing area that increases the clearance in the direction of rotation causing increased outflow during depressurization and lower duct pressure before duct is exposed to low pressure port and furthermore causing increased inflow during the pressurization phase before duct is exposed to the high pressure port, which will dissipate pressure energy as opposed to producing cavitation or pressure waves with result wear and noise.

Exchanger devices include a plurality of fixed exchange ducts and a rotating valve assembly for directing flow to and from the plurality of exchange ducts. Methods of exchanging pressure between fluid streams may include directing fluids through an exchange device and pressurizing a fluid in the plurality of exchange ducts of the exchanger device.

The invention provides a liquid excess pressure energy recovery device. The device comprises a drive motor and a rotating assembly, wherein the rotating assembly comprises a rotating ring used for seal, a drive shaft, a rotor and a driven shaft; the rotor is provided with one or more flow channels which are parallel to the axial direction of the drive shaft; and a pressure exchanger is also provided with a fixed assembly, wherein the fixed assembly comprises a mechanical sealing cover, a static ring used for mechanical seal, a fixed valve plate, a floating valve plate, a shell, a compression spring, an outer end cover and a bolt. The liquid excess pressure energy recovery device of the invention has an energy recovery rate over 90 percent, has much higher energy recovery rate compared with pressure energy utilization devices such as a Francis pump, a Pelton turbine and the like which have the energy recovery rate of between 30 and 70 percent and need converting mechanical energy intermediately, has higher adaptability to working condition changes, and can also keep the energy recovery rate over 90 percent when the conditions such as flow rate, temperature and the like change.

The invention relates to split-chamber pressure exchangers. Split-chamber pressure exchangers are characterized in that the pressure exchange chambers and the pistons thereof are split in two. Each fluid passes through the corresponding chamber thereof, such that said fluids cannot be mixed. The cross sections of the chambers can be varied in order to vary the transmitted pressure. The reverse line operation can be established and synchronized using a U-shaped tube with telescopic sides and a fixed base filled with fluid or diametrically opposed curved lines, and multiple arrangements can be used. Split-chamber pressure exchangers can be used as surface or well pumping systems and the pumping fluid used can differ from the fluid to be pumped. Different levels of any material can be exploited at any storage site using a chamber with elastic walls filled with fluid and attached to the bottom. Electric power can be generated by centrifuging the pre-pumped fluid.

A pressure pump in a primary liquid flow is combined with a pressure exchanger for energy recovery from a secondary liquid flow. A motor-driven rotor portion, including two (primary and secondary) rotatable drum-type cylinder assemblies, is disposed between end blocks configured with input/output ports and cavities forming sliding synchronous reversing valves. Interconnected piston assemblies, including at least one primary piston and one secondary piston, are reciprocated axially by a central angled swash-plate in a progressive sequential manner by rotation of the rotor portion. The combination machine can be optimized for beneficial deployment in a reverse osmosis seawater desalination system to provide unusual simplicity, high efficiency energy recovery from the brine discharge flow and low overall operating cost.

A pressure exchanger system having at least two tubular chambers, in which a plurality of reversing valves reverse the flow paths of fluid flows through the at least two tubular chambers. At least one driven reversing valve alternately reverses the flow paths between a supply source, which supplies a high-energy high-pressure fluid, and the tubular chambers. In reversing the liquid flows and shutting off previously open flow paths, the driven reversing element in the reversing valve executes a discontinuous or variable movement sequence.

The invention discloses a heat-radiating, recovering and cooling system for a mine. The system comprises an enclosed cooling tower, a thermal energy recovering device, a thermal energy recovering device water circulating pump, a pressure exchanger, a pressure exchanger water circulating pump, a refrigerating and cooling device, a fan and an underground cooling unit water circulating pump, whereinall components adopt modular designs. The system integrates the advantages of centralized refrigeration and distributed refrigeration, so that a good underground cooling effect can be achieved. Meanwhile, a thermal energy recovery technology is adopted, so that all thermal energy produced by a refrigerator is recovered and utilized, the recovered thermal energy can be used for supplying hot waterfor bathing to the ground as well as heat in office areas in winter, and a boiler can be fully eliminated. A water treatment system of the system can be used for producing purified water or softened water by using waste water drained by a sewage treatment plant, and the produced water can be recycled by the system, so that the requirements for energy conservation and environmental protection are met.

The invention provides a pressure exchanger, which comprises a rotating component. The rotating component comprises a driving shaft, a rotor, a left thrust disk and a right thrust disk positioned on two sides of the rotor respectively, a spring, and a compaction bar acted by the spring to thrust the right thrust disk to the right; the pressure exchanger is also provided with a non-rotating component which comprises a shaft seal cover, a left end cap provided with a relatively high-pressure fluid inlet and a relatively low-pressure fluid outlet, a left port plate arranged on the left side of the left thrust disk, a right port plate arranged on the right side of the right thrust disk, a right end cap provided with a relatively low-pressure fluid inlet and a relatively high-pressure fluid outlet, and a shell. The pressure exchanger has higher energy recovery efficiency, needs no complex valve control system, basically has no fluid pressure and fluctuation of flow in a used system, hardlyhas leakage on a thrust face and a sealing face, has less leakage and higher volume efficiency than a pressure exchanger in clearance fit, and is convenient to produce efficient miniature, medium andlarge-sized pressure exchangers.

A valve for switching fluid paths, particularly for pressure exchanger installations with tubular chambers through which fluid flows in an alternating manner, including a rotatable closing element (12, 13) provided with a motorized drive shaft (14) and arranged inside a housing (2) having a plurality of connections (3, 4) for connecting lines leading to a pipe system and to a respective end of at least one pressure exchanger. Another end of each pressure exchanger is connected through a valve arrangement to a second pipe system. A splitter (7) provided with a plurality of overflow paths (17, 18, 27) is arranged inside the housing (2); mouths of the overflow paths are located on two axial end faces (10, 11) and on the circumference of the splitter (7), and a rotatable, disk-shaped control element (12, 13) is arranged in a sealing manner at each end face of the splitter (7).

The invention concerns a reverse osmosis system (1) with a membrane unit (2) comprising an inlet (3), a permeate outlet (4) and a concentrate outlet (5), a high-pressure pump (8) that is connected to the inlet (3), a pressure exchanger (11) connected on its concentrate side (10) to the concentrate outlet (5), and a booster pump between the pressure exchanger (11) and the inlet (3). It is endeavoured to make the energy consumption as small as possible. For this purpose, the booster pump is made as a displacement pump.

The invention provides a rotation type energy recovery device. The rotation type energy recovery device comprises a rotation assembly and a non-rotation assembly. The rotation assembly comprises a drive shaft, a movable ring, an upper flow distribution rotor and a lower flow distribution rotor, wherein the drive shaft is sleeved with the movable ring, and the movable ring is used for mechanical seal. The non-rotation assembly comprises a mechanical seal cover, a static ring, an upper end cover, an upper antifriction bearing, an upper thrust collar, a spring ring, a pressure exchange tube, a shell, a lower thrust collar, a lower antifriction bearing and a lower end cover, wherein the static ring is used for mechanical seal and is matched with the movable ring, the upper antifriction bearing is installed in the upper end cover, the pressure exchange tube is axially parallel to the drive shaft, and the lower antifriction bearing is installed in the lower thrust collar. The rotation type energy recovery device adopts motor drive, rotation flow distribution and self-tight seal, achieves efficient and stable pressure and energy exchange, solves the technical problem that a pressure exchanger in the prior art can not handle large or ultra-large flow, and meanwhile can replace a valve control power exchanger energy recovery device for large or ultra-large rated flow exchange processing and have stable and continuous flow and pressure.

A rotor positioning system for rotary pressure exchangers with a rotor with a central bore accommodating an axle affixed to end covers in each end having at least one pair of high and low pressure ports in communication with opposing end cover ports through coaxial rotor ducts.

Valve and related assemblies, systems, and methods may include a self-cleaning feature that may be configured to at least partially displace material from a portion of the valve. Such valves may be utilized in a pressure exchanger.