WO2017190119A1 - Unité d'injection de produits chimiques à haute pression - Google Patents

Unité d'injection de produits chimiques à haute pression Download PDF

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Publication number
WO2017190119A1
WO2017190119A1 PCT/US2017/030328 US2017030328W WO2017190119A1 WO 2017190119 A1 WO2017190119 A1 WO 2017190119A1 US 2017030328 W US2017030328 W US 2017030328W WO 2017190119 A1 WO2017190119 A1 WO 2017190119A1
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WO
WIPO (PCT)
Prior art keywords
pump
valve
liquid
tank
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/030328
Other languages
English (en)
Inventor
Daniele MAROZZI
Salvador ZARAGOZA GRIMAL
Massimo ANDRIOTTO
Leonardo Renzo Vicentini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mantovani & Vicentini Srl
MI LLC
Original Assignee
Mantovani & Vicentini Srl
MI LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mantovani & Vicentini Srl, MI LLC filed Critical Mantovani & Vicentini Srl
Publication of WO2017190119A1 publication Critical patent/WO2017190119A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/16—Pumping installations or systems with storage reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C2/00—Rotary-piston engines
    • F03C2/30—Rotary-piston engines having the characteristics covered by two or more of groups F03C2/02, F03C2/08, F03C2/22, F03C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F03C2/304—Rotary-piston engines having the characteristics covered by two or more of groups F03C2/02, F03C2/08, F03C2/22, F03C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movements defined in sub-group F03C2/08 or F03C2/22 and relative reciprocation between members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

Definitions

  • Pipelines may be used to transport pressurized chemicals, such as methane, over long distances. Over time, such pipelines are subject to corrosion, bacterial buildup, and freezing.
  • Different mobile units exist to pump chemicals into pressurized pipelines to prevent corrosion, bacterial buildup, and freezing. Some units are mounted on a truck and powered by a generator. Other units are integrated with the truck and thus, power to such units are dependent upon the truck. As a result, a failure of the truck may prevent the unit from operating as intended.
  • a chemical injection unit includes an engine, a first pump, and a second pump positioned downstream from the first pump.
  • a first hydraulic circuit transmits power from the engine to the first pump, the second pump, or both.
  • Tanks are in fluid communication with the first pump and the second pump.
  • a control panel controls operation of the engine, the first pump, and the second pump to cause liquid to flow from at least one of the tanks to into a pipeline.
  • the chemical injection unit includes an engine, a first pump coupled to and in fluid communication with a pipeline injection line, and a second pump coupled to and in fluid communication with the pipeline injection line.
  • the second pump is positioned downstream from the first pump in the pipeline injection line.
  • a first hydraulic circuit transmits power from the engine to the first pump, the second pump, or both.
  • a first set of tanks is coupled to an in fluid communication with a first inlet line and an outlet line. Liquid is introduced into the first set of tanks through the first inlet line, and the liquid flows out of the first set of tanks through the outlet line and into the pipeline injection line, at a point that is upstream from the first pump.
  • a method for treating a pipeline includes opening a first valve proximate to an outlet of a first tank, opening a second valve downstream from a first pump, closing a third valve downstream from the first pump, and causing, with the first pump, a first liquid to flow out of the first tank, through the first valve, through the first pump, through the second valve, through a second pump that is downstream from the second valve, and into a pipeline having an internal pressure that is greater than an ambient pressure.
  • FIG. 1 illustrates a perspective view of an injection unit 100, such as a high pressure chemical injection unit, according to an embodiment.
  • FIG. 2 illustrates an exploded perspective view of the injection unit, according to an embodiment.
  • FIG. 3 is a perspective view of a tank in the injection unit, according to an embodiment.
  • FIG. 4 illustrates a schematic view of the injection unit, according to an embodiment.
  • FIG. 5 illustrates a flowchart of a method for treating a pipeline, according to an embodiment.
  • first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
  • a first object could be termed a second object, and, similarly, a second object could be termed a first object, without departing from the scope of the present disclosure.
  • the first object and the second object are both objects, but they are not to be considered the same object.
  • FIGs. 1 and 2 illustrate a perspective view and an exploded perspective view, respectively, of an injection unit 100, such as a high pressure chemical injection unit according to an embodiment.
  • the injection unit 100 may be configured to pump liquids into a pipeline 200 to protect the pipeline 200 against corrosion, bacterial formations, freezing, and the like.
  • the injection unit 100 may deliver extended treatment batches into the pipeline 200 at pressures up to 350 bar (35 MPa).
  • the injection unit 100 may be mounted on a vehicle (e.g., a truck) 102, and the injection unit 100 may be fully independent from the vehicle 102.
  • the injection unit 100 may be operated while mounted on the vehicle 102, or it may be removed from the vehicle 102 prior to operation.
  • the injection unit 100 may include a frame 1 10.
  • the frame 110 may include two metallic (e.g., steel) structures, with one on top of the other.
  • a lower metallic structure may include a first set of steel beams that are coupled (e.g., welded) to a second set of perpendicular steel beams.
  • the first set of steel beams may include four beams that are about 12 meters long, and the second set of steel beams may include three beams that are about 2 meters long.
  • the lower metallic structure may be anchored to the truck 102.
  • an upper metallic structure may include a first set of steel beams that are coupled (e.g., welded) to a second set of perpendicular steel beams.
  • the first set of steel beams may be about 11 meters long, and the second set of steel beams may be about 2 meters long, for example.
  • a plurality of intermediate steel beams may be coupled between the first and second metallic structures.
  • the intermediate steel beams may include 32 beams that are about 30 cm long.
  • the frame 1 10 may be connected to a 40 inch (102 cm) trailer by one or more (e.g., six) twist locks.
  • One or more engines 120 may be positioned on and/or coupled to the frame 110.
  • the engine 120 may provide power to the injection unit 100.
  • the engine 120 may be independent from the truck's engine (not shown).
  • the engine 120 may be an industrial FPT turbocharged diesel engine capable of producing 80 kW at 1600 RPM at the flywheel.
  • the engine 120 may produce about 24 volts and 90 amps at the alternator.
  • the engine 120 may be managed by a dedicated control panel that is linked to a programmable logic circuit ("PLC") 192 in the control panel 190 as discussed below.
  • PLC programmable logic circuit
  • One or more tanks may also be may be positioned on and/or coupled to the frame 110.
  • six of the tanks 131-133, 135-137 may have an internal volume from about 0.5 m 3 to about 3 m 3 (e.g., about 1.2 m 3 ), and the internal volumes may have chemicals stored therein.
  • the respective tanks 131-133, 135-137 may include the same chemicals therein, or different chemicals.
  • Two of the tanks 134, 138 may have internal volumes from about 1 m 3 to about 4 m 3 (e.g., about 2 m 3 ), and the internal volumes may have clean water stored therein.
  • One additional tank 139 may have may have an internal volume from about 0.05 m 3 to about 1 m 3 (e.g., about 0.1 m 3 ), and the internal volume may have clean water stored therein that may be used for an emergency shower.
  • the chemicals stored in the aforementioned tanks may be or include biocides, corrosion inhibitors, antifreeze, solvents, water, or a combination thereof. Examples of possible biocides may include, but are not limited to, glutaraldehyde, tetrakis (hydroxymethyl) phosphonium sulfate, alkyl benzyl dimethyl ammonium chloride, tri ethylene glycol and/or quaternary ammonium chloride.
  • Corrosion inhibitors may be or include mono-ethylene glycol, 2-butoxy ethanol, 2- aminoethanol, ethanediol, ethoxylated imadazolines, propan-2-ol, quaternary ammonium compounds, benzyl (hydrogenated tallow alkyl) dimethyl, chlorides, salts of carboxylic acid, thioalcohol, mono-ethylene glycol, 2-butoxy ethanol or a combination thereof.
  • Each of the respective tanks 131-133, 135-137 may include the same chemicals therein or different chemicals.
  • One or more pumps may also be positioned on and/or coupled to the frame 110.
  • the pumps 141, 142 may be driven by the engine 120.
  • the first pump 141 may be a low pressure centrifugal pump that is configured to transfer the liquids (i.e., cause the liquids to flow).
  • the first pump 141 may have a speed up to about 3500 RPM, a maximum flow rate of about 18 m 3 /hour, a maximum head of about 39 meters, and use about 3 kW of power.
  • the first pump 141 may have a pressure from about 0.5 bar to about 4 bar.
  • the first pump 141 may be stopped by the PLC 192 if the pressure delivered by the second pump 142 exceeds 390 bar for more than 2 seconds, or if the flow meter 170 (introduced below) indicates that there is no flow after 5 seconds.
  • the first pump 141 may a RD 32-16 2P closed impeller centrifugal pump manufactured by Salvatore Robuschi.
  • the second pump 142 may be a high pressure piston pump that is configured to increase the pressure of the liquids.
  • the second pump 142 may cause the pressure of the liquid to range from about 3 bar (0.3 MPa) to about 350 bar (35 MPa), or more.
  • the second pump 142 may operate at a pressure that is higher than the first pump 141.
  • the second pump 142 may have a speed up to about 1000 RPM, a flow rate from about 5 liters/minute to about 57 liters/minute, and use about 37 kW of power.
  • the second pump 142 may be stopped by the PLC 192 if the pressure exceeds 380 bar for more than 2 seconds, or if the pressure exceeds 400 bar and/or the flow meter 170 indicates no flow after 5 seconds.
  • the second pump 142 may be a Pratissoli pump manufactured by Interpump Group S.p.A.
  • One or more hydraulic circuits may also be may be positioned on and/or coupled to the frame 110.
  • the hydraulic circuits 151, 152 may be configured to transmit power from the engine 120 to the pumps 141, 142.
  • the first hydraulic circuit 151 may be an open loop circuit including a hydraulic vane pump and a vane motor.
  • the first hydraulic circuit 151 may drive the first pump (e.g., the low pressure pump) 141.
  • the first hydraulic circuit 151 may allow the first pump 141 to have at least two speeds.
  • the first pump 141 may have a low speed for high pressure injection, and a high speed for filling and mixing.
  • the speed of the first pump 141 may be adjusted continuously manually.
  • the first pump 141 may also be operated by two electro-valves that are not proportional (e.g., the user may choose between two or more speeds).
  • the second hydraulic circuit 152 may be a closed loop circuit including a variable capacity axial piston pump coupled to a fixed capacity piston motor.
  • the second hydraulic circuit 152 may drive the second pump (e.g., the high pressure pump) 142.
  • the speed of the second pump 142 may be adjusted continuously either manually or by a proportional electro-valve.
  • a plurality of pipes (also referred to herein as "lines") 451-455 may be coupled to the frame 110, the tanks 131-139, the pumps 141, 142, the hydraulic circuits 151, 152, or a combination thereof.
  • the liquids may be transferred, through the lines 451-455, from one tank (e.g., tank 131) to another tank (e.g., tank 132), or from one or more of the tanks (e.g., tank 131) to the pipeline 200.
  • an upper portion of the lines 451-455 may be used to fill the tanks 131-134, while a lower portion of the lines 451-455 may be used for flushing, injecting, or mixing the liquids.
  • the tanks 131-139, lines 451-455, hydraulic circuits 151, 152, etc. may include quick-lock connections to reduce or prevent spills and facilitate disconnections when the lines 451-455 are pressurized.
  • a flow meter 170 may be coupled to one or more of the lines 451-455.
  • the flow meter 170 may be a Coriolis flow meter that measures the amount of liquid pumped and helps to regulate the speed of the pumps 141, 142.
  • a plurality of valves may be coupled to and/or positioned within the lines 451-455.
  • the valves may be or include ball valves that are controlled and/or monitored by the PLC 192 as introduced below. The valves are described in greater detail with respect to FIG. 4.
  • a control panel 190 may also be may be positioned on and/or coupled to the frame 110.
  • the control panel 190 may include a PLC 192 that receives information from and/or controls the operation of the engine 120, the pumps 141, 142, the hydraulic circuits 151, 152, the valves, the flow meter 170, or a combination thereof.
  • the PLC 192 may monitor and record working parameters to prevent abnormal situations. For example, the PLC 192 may continuously monitor injection parameters to be able to detect when one or more hoses or lines 451-455 rupture or leak.
  • the PLC 192 may monitor the positions of the valves before the injection unit 100 is started to enable the startup.
  • the PLC 192 may also monitor the pressure and/or level of the liquids in the tanks 131-139 and the lines 451-455 at various locations, and monitor the hydraulic oil pressure. The PLC 192 may alert a user if the pressure exceeds a predetermined amount.
  • the injection unit 100 may include multiple levels of protection against overpressure in the tanks 131-139 and lines 451-455.
  • the first level may be electronic, and the PLC 192 may stop one or more of the pumps 141, 142 via hydraulic shutdown.
  • the second level may be electronic, and the PLC 192 may stop one or more of the pumps 141, 142 by stopping the engine 120.
  • the third level may be mechanical, and a user may actuate a pressure relief valve in one or more of the pumps 141, 142.
  • the fourth level may be mechanical, and may (e.g., automatically) actuate a safety valve in the delivery line.
  • One or more containment trays may be positioned beneath the frame 110 and the tanks 131-139.
  • the containment tray 194 may have a capacity from about 1 m 3 to about 12 m 3 (e.g., about 8 m 3 ), for example.
  • the containment trays 194 may be configured to collect any liquids that spill out of the injection unit 100.
  • FIG. 3 is a perspective view of a tank 131 in the injection unit 100, according to an embodiment.
  • the tank 131 may include one or more level indicators 311, 312 to indicate the amount of liquid in the tank 131.
  • the first level indicator 311 may provide a visual indication
  • the second level indicator 312 may be electrical (e.g., a sensor).
  • the second level indicator 312 may send a signal to the PLC 192, which may cause the pump(s) 141, 142 to stop, or the PLC 192 may send an acoustic and/or visual signal to the user telling the user to close one or more of the valves, if the liquid level inside the tank 131 is greater than a predetermined amount.
  • the tank 131 may also include a manhole lid 320 for refilling or cleaning the tank 131.
  • the tank 131 may also include a relief valve 331 that activates in case of overflow and closes down in case of overturning during transportation.
  • the tank 131 may also include one or more isolation valves 332, 333 for maintenance purposes.
  • the other tanks 132-139 may include the same features or different features.
  • FIG. 4 illustrates a schematic view of the injection unit 100, according to an embodiment.
  • the injection unit 100 may include a plurality of inlets and outlets. As shown, a first inlet 401 may be used to introduce fuel to the engine 120. A second inlet 402 may be used to introduce air into the engine 120. A third inlet 403 may be used to introduce liquid into the tanks 131-134. A fourth inlet 404 may be used to introduce liquid into the tanks 135-138. A fifth inlet 405 may be used to introduce additional liquids into the injection unit 100. The fifth inlet 405 may also be used as a drain to expel liquids from the injection unit 100. A sixth inlet 406 may be used to introduce liquids into an auxiliary tank 410.
  • a first outlet 411 may be used to release the exhaust from the engine 120.
  • a second outlet 412 may be used to expel liquid from the first (e.g., low pressure) pump 141.
  • a third outlet 413 may be used as a drain for a filter.
  • a fourth outlet 414 may be used as a drain for a manifold.
  • a fifth outlet 415 may be used as an outlet for the second (e.g., high pressure) pump 142.
  • a sixth outlet 416 may also be used as an outlet for the second (e.g., high pressure) pump 142.
  • the liquid flowing through the sixth outlet 416 may be introduced into the pipeline 200.
  • a seventh outlet 417 and an eighth outlet 418 may be used as a drain.
  • the respective tanks 131-138 may include a first valve 421 -428 through which the liquid may be introduced into the tanks 131-138, and a second valve 431-438 through which the liquid may exit the tanks 131-138.
  • the respective tanks 131-138 may include a third valve 441-448 that is part of the visual level. The third valves 441-448 may be used to drain the pressure of the air into the tanks 131-138 before the lids are opened.
  • a first inlet line 451 may be coupled to and in fluid communication with the first valves 421-424 and the tanks 131-134. Liquid may flow through the first inlet line 451 and the first valves 421-424 and be introduced into the tanks 131-134.
  • a second inlet line 452 may be coupled to and in fluid communication with the first valves 425-428 and the tanks 135-138. Liquid may flow through the second inlet line 452 and the first valves 425-428 and be introduced into the tanks 135- 138.
  • An outlet line 453 may be coupled to and in fluid communication with the second valves 431-438 and the tanks 131-138. Liquid may flow from the tanks 131-138, through the second valves 431-438, and into the outlet line 453.
  • the outlet line 453 may be coupled to and in fluid communication with a pipeline injection line 454.
  • a valve 461 may be positioned in the outlet line 453, upstream from the pipeline injection line 454.
  • Another valve 462 may be positioned in the pipeline injection line 454, downstream from the outlet line 453.
  • the first pump 141 may be positioned in the pipeline injection line 454.
  • a valve 463 may be positioned in the pipeline injection line 454 and coupled to an outlet of the first pump 141.
  • the flow meter 170 may be positioned in the pipeline injection line 454 and coupled to and in fluid communication with the first pump 141 and/or the valve 463.
  • the flow meter 170 may be downstream from the first pump 141.
  • a return line 455 may be coupled to and in fluid communication with the pipeline injection line 454, the first inlet line 451, and the second inlet line 452.
  • the return line 455 may be coupled to the pipeline injection line 454 at a point that is downstream from the first pump 141 and/or the flow meter 170.
  • the return line 455 may be used to circulate liquids from the pipeline injection line 454, into the first inlet line 451 and/or the second inlet line 452, and back into one of the tanks 131-138.
  • the return line 455 may have a valve 464 positioned therein. Another valve 465 may be positioned between the return line 455 and the first inlet line 451, and yet another valve 466 may be positioned between the return line 455 and the second inlet line 452.
  • a valve 467 may be positioned in the pipeline injection line 454, downstream from the flow meter 170 and the pipeline injection line 454.
  • the second pump 142 may be positioned in the pipeline injection line 454, downstream from the return line 455 and the valve 467.
  • the outlet of the second pump 142 may be coupled to and in fluid communication with the pipeline 200.
  • FIG. 5 illustrates a flowchart of a method 500 for treating a pipeline 200, according to an embodiment.
  • the method 500 may be viewed together with the schematic view of the injection unit 100 shown in FIG. 4.
  • the method 500 may include introducing liquid into one or more tanks 131-139 via an external pump (not shown) or gravity, as at 502.
  • a pump may cause liquid to flow through the inlet 403, through the valve 421, and into the first tank 131.
  • the PLC 192 may turn the pump off, close the valve 421, or a combination thereof.
  • the pump may cause liquid to flow through the inlet 403, through the valve 422, and into the second tank 132.
  • the liquid pumped into the second tank 132 may be the same as the liquid pumped into the first tank 131, or it may be a different liquid (e.g., different chemical).
  • the PLC 192 may turn the pump off, close the valve 422, or a combination thereof. This process may occur for the tanks 131-134 one after another.
  • the pump (not shown) may cause liquid to flow through the inlet 403, through the valves 421-424, and into the tanks 131-134 simultaneously.
  • Introducing liquid at 502 may also include causing liquid to flow through the inlet 404, through the valve 425, and into the fifth tank 135.
  • the pump may be the same pump used at 502 or a different pump.
  • the PLC 192 may turn the pump off, close the valve 425, or a combination thereof.
  • the pump may cause liquid to flow through the inlet 404, through the valve 426, and into the sixth tank 136.
  • the liquid pumped into the sixth tank 136 may be the same as the liquid pumped into the fifth tank 135, or it may be a different liquid (e.g., different chemical).
  • the PLC 192 may turn the pump off, close the valve 426, or a combination thereof. This process may occur for the tanks 135-138 one after another.
  • the pump (not shown) may cause liquid to flow through the inlet 404, through the valves 425-428, and into the tanks 135-138 simultaneously.
  • the method 500 may also include introducing liquid into the one or more tanks 131-138 using the first (e.g., low pressure) pump 141, as at 504.
  • the first pump 141 may cause liquid to flow through the inlet 405, through the flow meter 170, and through the valves 462, 463.
  • the user may then select to have the liquid flow into the return line 455 by opening the valve 464.
  • the user may then select to have the liquid flow into the first inlet line 451 by opening the valve 465, into the second inlet line 452 by opening the valve 466, or to have the liquid flow into both lines 451, 452 by opening both valves 465, 466.
  • the user may then select which tanks 131-138 to fill by opening one or more or the first valves 421-428.
  • the first (e.g., low pressure) pump 141 may stop when the flow meter 170 detects that the product source has run out or when the level sensor(s) 312 on the tank(s) 131-138 detect(s) that the level has reached a predetermined amount.
  • the user may also select a certain volume of liquid to transfer, and the first pump 141 may stop after this volume has been pumped.
  • the method 500 may also include mixing the liquids from two or more tanks 131-138 using the first (e.g., low pressure) pump 141, as at 506.
  • the first (e.g., low pressure) pump 141 may cause the liquid to flow out of the second tank 132, through valves 432, 461, 462, through the first (e.g., low pressure) pump 131, through the flow meter 170, through valves 463, 464, 421, and into the first tank 131.
  • the tanks 131, 132 may be filled with predetermined amounts of liquid, and then the valves 421, 422, 431, 432 may be opened. Further, the first pump 141 may run to mix the liquids. The PLC 192 may stop the mixing process if the flow meter 170 does not detect any liquid flowing therethrough and/or if any of the tanks 131-138 involved in the mixing process reach their maximum fill level.
  • the method 500 may also include flushing or cleaning the pipes/lines 451-455 of the HCPI unit 100, as at 508. This may include opening the valves 434, 438 to draw water from the tanks 134, 138.
  • the method 500 may also include injecting the liquids into a pipeline 200, as at 510.
  • the liquid from the first tank 131 may be injected into the pipeline 200.
  • This may include opening valves 431, 461, 462, 463, 467, and closing valve 464.
  • the liquid may flow through the valves 431, 461, 462, through the first (e.g., low pressure) pump 141, through the valve 463, through the flow meter 170, through the valve 467, through the second (e.g., high pressure) pump 142, through the outlet 416, and into the pipeline 200.
  • the liquid(s) may have a pressure from about 10 bar to about 350 bar when introduced into the pipeline 200.
  • the pipeline 200 may have an internal pressure that is greater than an ambient pressure.
  • the internal pressure may be from about 10 bar to about 350 bar when the liquid(s) is/are introduced thereto. Injecting the liquids may stop when the flow meter 170 detects that the product source has run out, if the pressure sensor in the delivery line detects a pressure above 380 bar for more than 2 seconds, if the pressure sensor in the delivery line detects a pressure above 400 bar (for any length of time), and/or if the flow meter 170 indicates no flow after 5 seconds.
  • the method 500 may also include bypassing tank level control, as at 512.
  • the tank level control may be or include the level sensors 312 indicating when the level in the tanks 131-138 is greater than a predetermined amount.
  • the tank level control may be bypassed to perform maintenance, in the event of an emergency, or if the PLC 192 fails.
  • the tank level control may be bypassed by unlocking handles on the valves in the injection unit 100. The handles may be unlocked manually using a key to allow a user to manually override the controls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne une unité d'injection de produits chimiques, laquelle unité comprend un moteur, une première pompe et une seconde pompe positionnée en aval de la première pompe. Un premier circuit hydraulique transmet une puissance à partir du moteur jusqu'à la première pompe, à la seconde pompe, ou aux deux. Des réservoirs sont en communication vis-à-vis des fluides avec la première pompe et la seconde pompe. Un tableau de commande commande le fonctionnement du moteur, de la première pompe et de la seconde pompe de façon à amener un liquide à s'écouler à partir d'au moins l'un des réservoirs dans une conduite.
PCT/US2017/030328 2016-04-29 2017-05-01 Unité d'injection de produits chimiques à haute pression Ceased WO2017190119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662329977P 2016-04-29 2016-04-29
US62/329,977 2016-04-29

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WO2017190119A1 true WO2017190119A1 (fr) 2017-11-02

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769221A (en) * 1985-12-23 1988-09-06 Marihart John R Chemical reaction apparatus
WO1989010050A1 (fr) * 1988-04-18 1989-11-02 Bengt Samuelsson Appareil pour melanger et repandre des liquides
US4886367A (en) * 1988-05-27 1989-12-12 Halliburton Company Apparatus for adding a selected additive into a mixture
US20010000996A1 (en) * 1998-03-06 2001-05-10 Grimland Kristian E. Multiple tub mobile blender
US20040123842A1 (en) * 2002-12-30 2004-07-01 Dandan Issac R. Fuel supply system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769221A (en) * 1985-12-23 1988-09-06 Marihart John R Chemical reaction apparatus
WO1989010050A1 (fr) * 1988-04-18 1989-11-02 Bengt Samuelsson Appareil pour melanger et repandre des liquides
US4886367A (en) * 1988-05-27 1989-12-12 Halliburton Company Apparatus for adding a selected additive into a mixture
US20010000996A1 (en) * 1998-03-06 2001-05-10 Grimland Kristian E. Multiple tub mobile blender
US20040123842A1 (en) * 2002-12-30 2004-07-01 Dandan Issac R. Fuel supply system

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