Pump control for operation on a variable pressure force main

A pumping unit and method controlling a variable speed pump to output constant flow rate against varying outlet pressure using a controller with stored data curves of flow rate versus discharge pressure for a plurality of pump speeds for the variable speed pump, including a processor determining appropriate pump speed for the sensed discharge outlet pressure by extrapolating between the stored data curves.

Ring grit remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wall. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side walls with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

Vortex-Type Grit Chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width “c” to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween. 1. A grit removal unit for a wastewater system , comprising:a round grit removal chamber defined by a bottom surface and a substantially annular vertical wall extending up from said bottom surface;a wastewater output from said grit removal chamber;a wastewater input opening through said annular vertical wall, said input opening having a bottom above the bottom surface of the grit removal chamber; a bottom wall aligned with said input opening bottom,', one of said side walls substantially tangential to said annular vertical wall, and', 'the other of said side walls having a downstream end intersecting with said chamber annular vertical wall at said annular vertical wall input opening, and, 'two side walls extending up from said channel bottom wall with'}, 'a divider wall extending upwardly in said influent channel between said influent channel side walls and having an upstream end and a downstream end, said downstream end terminating substantially in alignment with said channel other side wall downstream end,', 'define a first influent channel portion between said divider wall and said one influent channel side wall and ...

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width “c” to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Ring Grit Remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wall. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side walls with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall. 1. A grit removal unit for a wastewater system , comprising:a round grit removal chamber defined by a bottom surface and a substantially annular vertical wall extending up from said bottom surface;a substantially horizontal annular ring spaced above said chamber bottom surface and extending inwardly from the chamber annular vertical wall to an inner edge; andan enclosed influent channel extending into said chamber beneath the ring, said influent channel having an outer side wall with a planar portion tangent to said chamber vertical wall and an inner side wall with a planar portion and a curved portion extending through an arc of at least about 90 degrees within said chamber annular vertical wall.290. The grit removal unit of claim 1 , wherein said inner side wall is a J-shaped baffle having a leg with a curved portion extending at least degrees and concentric with said chamber annular vertical wall claim 1 , said curved portion secured around the inner diameter of said ring.3. The grit removal unit of claim 1 , wherein said inner side wall curved portion spirals from a proximate end adjacent said baffle leg to a distal end spaced from said baffle leg claim 1 , said spiral having a radius at said distal end which is less than the radius at the proximate end.4. The grit removal unit of claim 1 , wherein said enclosed influent channel inner side wall curved portion extends through an arc of between about 90 degrees ...

Vortex-Type Grit Chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width “c” to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

PUMP CONTROL FOR OPERATION ON A VARIABLE PRESSURE FORCE MAIN

A pumping unit and method controlling a variable speed pump to output constant flow rate against varying outlet pressure using a controller with stored data curves of flow rate versus discharge pressure for a plurality of pump speeds for the variable speed pump, including a processor determining appropriate pump speed for the sensed discharge outlet pressure by extrapolating between the stored data curves. 1. A pumping unit adapted to pump fluid at a selected flow rate , comprising:a selected variable speed pump having a discharge outlet;a pressure sensor at said pump discharge outlet; a memory storing data curves of flow rate versus discharge pressure for a plurality of pump speeds for the selected pump, and', 'a processor adapted to determine the pump speed which will provide the selected flow rate for the sensed discharge outlet pressure by extrapolating between the stored data curves; and, 'a controller connected to said pump to control the speed of said pump, said controller including'}a link providing the discharge outlet pressure sensed by the sensor to the controller.2. The pumping unit of claim 1 , wherein said memory stores data curves for first claim 1 , second claim 1 , third and fourth pump speeds claim 1 , and said processor determines the pump speed by determining the two data curves closest to said sensed pressure for the selected flow rate and selecting a pump speed which is proportionately the same between the pump speed of the two closest data curves as the sensed discharge pressure is between the pressure of the two closest data curves at the selected flow rate.3. The pumping unit of claim 1 , wherein said sensor is a pressure transducer.4. A fluid pumping system claim 1 , comprising a plurality of pumping units pumping into a force main claim 1 , wherein at least one of said pumping units is a pumping unit according to .5. A method of controlling a selected pump to pump a constant flow rate of a fluid against changing pressures claim 1 , ...

Pumping System

A pumping system including a pumping chamber with a fluid sensor having a cylindrical shaft extending into the priming chamber. The sensor has a sensing dome on an end of a cylindrical shaft extending into the priming chamber, with the dome having a vertical base having a diameter less than the cylindrical shaft diameter. The sensor signals a controller whether liquid is present based on an algorithm with settings for dampening of the electromagnetic field, conductance of the electric field, and/or permittivity of the magnetic field using settings which correlate to the fluid environment. The controller controls operation of the pump and primer based on the sensor signal.

Ring Grit Remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wall. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side walls with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall. 1. A grit removal unit for a wastewater system , comprising:a round grit removal chamber defined by a substantially horizontal bottom surface and a substantially annular vertical wall extending up from said bottom surface;a substantially horizontal annular ring spaced above said chamber bottom surface and extending inwardly from the chamber annular vertical wall to an inner edge, said ring extending around the entirety of the chamber annular vertical wall; andan enclosed influent channel extending into said chamber beneath the ring, said influent channel having an outer side wall with a planar portion tangent to said chamber annular vertical wall and an inner side wall with a planar portion and a curved portion extending through an arc of at least about 90 degrees within said chamber annular vertical wall, wherein said inner side wall curved portion extends downwardly from the inner edge of the ring to the chamber bottom surface.2. The grit removal unit of claim 1 , wherein said inner side wall is a S-shaped baffle having a leg and a curved portion extending at least about 90 degrees and concentric with said chamber substantially annular vertical wall claim 1 , with said J-shaped baffle curved portion secured to the inner edge of said ring.3. The grit removal unit of claim 2 , wherein said J-shaped baffle curved portion spirals from a proximate end adjacent said J-shaped baffle leg to a distal end spaced from said ...

Circular Parallel Plate Grit Remover

A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. Concentric inverted truncated cone lamella plates are supported in the grit removal chamber above the layered plates, with the lamella plates radially spaced from one another relative to the center axis. An influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the lamella plates allows fluid to exit the grit removal chamber. 1. A grit removal unit for a wastewater system for removing grit from a fluid , comprising:a grit removal chamber defined by a bottom surface and a vertical wall extending up from said bottom surface, said grit removal chamber having a substantially central vertical axis;a grit storage chamber disposed below said grit removal chamber, and at least one opening through said grit removal chamber bottom surface through which grit from said grit removal chamber may pass into said grit storage chamber;at least one layer plate in said grit removal chamber, said layer plate being an inverted truncated cone annular around said central vertical axis, said at least one layer plate being spaced from the grit removal chamber vertical wall to allow fluid flow between the at least one layer plate and the grit removal chamber vertical wall;a plurality of concentric inverted truncated cone lamella plates in said grit removal chamber around said central vertical axis and above said at least one layer plate, said lamella plates being radially spaced from one another relative to the central vertical axis wherein said spacings between adjacent lamella plates define ...

Ring grit remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wail. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side wails with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width "c" to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Circular parallel plate grit remover

A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. Concentric inverted truncated cone lamella plates are supported in the grit removal chamber above the layered plates, with the lamella plates radially spaced from one another relative to the center axis. An influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the lamella plates allows fluid to exit the grit removal chamber.

Vortex-type grit chamber.

Una unidad de desarenado incluyendo un conducto de afluente dirigiendo las aguas residuales con arena dentro de una cámara desarenadora redonda y un conducto de efluentes que recibe la salida de aguas residuales desde la cámara. Una pared divisoria se extiende hacia arriba entre los lados del conducto de afluente, y las compuertas en el extremo corriente arriba de la pared divisoria son ajustables para selectivamente abrir las porciones de conducto en los lados opuestos de la pared divisoria. Un miembro de guía de salida está montado para permitir el ajuste selectivo de la anchura "c" de la abertura de flujo de salida para el conducto de efluentes. El miembro de guía de salida tiene una parte inferior horizontal que se extiende desde la cámara dentro del conducto de efluentes a través de la anchura de la abertura de salida, y una pared de guía que se extiende hacia arriba desde la parte inferior del miembro de guía. La pared de guía tiene un extremo delantero separado desde la pared vertical de la cámara anular para definir la anchura de la abertura del flujo de salida de entre los mismos.

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width "c" to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width "c" to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Variable influent flow channel baffle

An input channel (and method of making an input channel) for the flow of waste water into a grit removal unit. The input channel has a depth D extending from the bottom to the top of the channel. One side wall of the channel is configured to vary the channel width over the depth of the channel, whereby (a) the width at the bottom of the channel is WB, (b) the width at the top of the channel is WT, and (c) the width at channel depth "d" above the bottom of the channel is Wd, wherein (i) 0 = d = D, (ii) WB < WT, and (iii) Wd is greater than or equal to the channel widths at substantially every channel depth less than "d". The channel profile may be integral to the channel, or defined by a separately added component, and selectively be stepped, tapered and/or curved.

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width "c" to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Ring grit remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wail. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side wails with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

Ring grit remover

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wail. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side wails with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

Vortex-type grit chamber

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber. A divider wall extends upwardly between the sides of the influent channel, and gates at the upstream end of the divider wall are adjustable to selectively open channel portions on opposite sides of the divider wall. An output guide member is mounted to allow selective adjustment of output flow opening width "c" to the effluent channel. The output guide member has a horizontal bottom extending from the chamber into the effluent channel across the width of the output opening, and a guide wall extending upwardly from the guide member bottom. The guide wall has a forward end spaced from the chamber annular vertical wall to define the output flow opening width therebetween.

Circular grit remover with tube settlers

A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. An array of tube settlers is supported in the grit removal chamber above the layered plates and around the center axis. An influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the tube settlers allows fluid to exit the grit removal chamber.

Apparatus with improved grit removal

A grit removal system with an annular grit removal chamber and a central hopper beneath the chamber bottom, including an opening through the chamber bottom to the hopper. Influent and effluent channels direct wastewater with grit into and out of the grit removal chamber. A plate over the chamber bottom opening has a first portion with a plurality of first openings therethrough and a second plate portion with a plurality of second openings therethrough, wherein the flow velocity for a given flow rate through the first openings is greater than the flow velocity for the given flow rate through the second openings.

Pumping system

A pumping system including a pumping chamber with a fluid sensor having a cylindrical shaft extending into the priming chamber. The sensor has a sensing dome on an end of a cylindrical shaft extending into the priming chamber, with the dome having a vertical base having a diameter less than the cylindrical shaft diameter. The sensor signals a controller whether liquid is present based on an algorithm with settings for dampening of the electromagnetic field, conductance of the electric field, and/or permittivity of the magnetic field using settings which correlate to the fluid environment. The controller controls operation of the pump and primer based on the sensor signal.

Pumping system

Pumping system

A pumping system including a pumping chamber with a fluid sensor having a cylindrical shaft extending into the priming chamber. The sensor has a sensing dome on an end of a cylindrical shaft extending into the priming chamber, with the dome having a vertical base having a diameter less than the cylindrical shaft diameter. The sensor signals a controller whether liquid is present based on an algorithm with settings for dampening of the electromagnetic field, conductance of the electric field, and/or permittivity of the magnetic field using settings which correlate to the fluid environment. The controller controls operation of the pump and primer based on the sensor signal.

Circular grit remover with tube settlers

A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. An array of tube settlers is supported in the grit removal chamber above the layered plates and around the center axis. An influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the tube settlers allows fluid to exit the grit removal chamber.

Apparatus with improved grit removal

A grit removal system with an annular grit removal chamber 22 and a central hopper (24, Fig. 2) beneath the chamber bottom, including an opening through the chamber bottom to the hopper. Influent and effluent channels 60, 80 direct wastewater into and out of the grit removal chamber. A plate 30 over the chamber bottom opening has a first portion (30a, Fig. 4) with a plurality of first openings 34 therethrough and a second portion (30b, Fig. 4) with a plurality of second openings 35 therethrough. The flow velocity for a given flow rate through the first openings is greater than through the second openings. In one aspect, the plate portions are split along a line and the first openings have a size, shape and/or number different than the size, shape or number of the second openings. The wastewater carries grit inwardly toward the plate whereby the flow path for grit passes over the plate so that a majority of grit flowing into the central hopper from the grit removal chamber passes through the first openings. In a further aspect, the area of each of the second openings is greater than the area of each of the first openings.

Apparatus with improved grit removal

APPARATUS WITH IMPROVED GRIT REMOVAL ABSTRACT OF THE DISCLOSURE [0047] A grit removal system with an annular grit removal chamber and a central hopper beneath the chamber bottom, including an opening through the chamber bottom to the hopper. Influent and effluent channels direct wastewater with grit into and out of the grit removal chamber. A plate over the chamber bottom opening has a first portion with a plurality of first openings therethrough and a second plate portion with a plurality of second openings therethrough, wherein the flow velocity for a given flow rate through the first openings is greater than the flow velocity for the given flow rate through the second openings. 1/4 64 60 ~ 86 6 A 66 50 44 34 70 40 5 22 26 0 23 Fig.1

Apparatus for introducing a gas into a body of liquid

Apparatus for introducing a gas into a body of liquid

A blade (40) for an apparatus for introducing gas into a large body of liquid is disclosed. The apparatus includes a submergible hub on a rotatable shaft, the hub having radially directed connectors to which the blades are attached. A pressurized gas source is in communication with the connectors. The blade (40) comprises a longitudinal member (100), including a mount (104) adapted to secure the longitudinal member (100) to one of the connectors of the hub. The member (100) has a lower side when secured to a connector, a passage inside the member (100) is closed on one end (102) and is in communication with the pressurized gas source when secured to one of the connectors, and openings between the passage and the lower side of the longitudinal member (100). The longitudinal member (100) has a membrane (110) around it, the membrane (110) having perforations (120) located around and along the longitudinal member (100) and spaced from the longitudinal member openings (108) whereby the membrane substantially blocks the longitudinal member openings (108) when pressure in the longitudinal member (100) passage is no greater than the pressure outside the membrane (110).

Pumping system

A pumping system including a pumping chamber with a fluid sensor having a cylindrical shaft extending into the priming chamber. The sensor has a sensing dome on an end of a cylindrical shaft extending into the priming chamber, with the dome having a vertical base having a diameter less than the cylindrical shaft diameter. The sensor signals a controller whether liquid is present based on an algorithm with settings for dampening of the electromagnetic field, conductance of the electric field, and/or permittivity of the magnetic field using settings which correlate to the fluid environment. The controller controls operation of the pump and primer based on the sensor signal.

Removedor de arenilla de placas paralelas circulares.

Una unidad de remoción de arenilla que incluye una cámara de remoción de arenilla cilíndrica por encima de una cámara de almacenamiento de arenilla, con una abertura a la cámara de almacenamiento de arenilla a través del fondo de la cámara de remoción de arenilla. Al menos una placa de capa es un cono truncado invertido alrededor del eje central que está espaciado de la pared vertical de la cámara de remoción de arenilla para permitir el flujo de fluido entre los mismos. Las placas de laminilla de cono truncado invertido concéntricas se soportan en la cámara de remoción de arenilla por encima de las placas estratificadas, con las placas de laminilla radialmente espaciadas entre sí con relación al eje central. Una abertura de afluente en la pared vertical de la cámara de remoción de arenilla por debajo de las placas estratificadas permite que fluido y arenilla entren a la cámara de remoción de arenilla, y una abertura de efluente en la pared vertical de la cámara de remoción de arenilla por encima de las placas de laminilla permite que el fluido salga de la cámara de remoción de arenilla.

Circular parallel plate grit remover

Prior art problems include requiring a large footprint, presenting space problems in designing overall treatment facilities in which the grit removal devices are only a part. The larger devices are inherently more costly and can use more energy. The large devices are not well adapted as might be desired to operate efficiently in environments in which the flow rate varies widely. A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. Concentric inverted truncated cone lamella plates are supported in the grit removal chamber above the layered plates, with the lamella plates radially spaced from one another relative to the center axis. The girt removal unit also comprises a second layer plate between a first and third layer plate is adjacent the grit removal chamber vertical wall to substantially block fluid flow between the second layer plate and the grit removal chamber wall. The unit also comprises an influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the lamella plates allows fluid to exit the grit removal chamber.

Desarenador circular con sedimentadores de tubo.

Una unidad de eliminación de arenilla que incluye una cámara de eliminación de arenilla cilíndrica encima de una cámara de almacenamiento de arenilla, con una abertura a la cámara de almacenamiento de arenilla a través del fondo de la cámara de eliminación de arenilla. Al menos una placa en capas es un cono truncado invertido alrededor del eje central que está espaciado de la pared vertical de la cámara de eliminación de arenilla para permitir el flujo de fluido entre ellas. Una serie de sedimentadores de tubos se apoya en la cámara de eliminación de arenilla, encima de las placas en capas y alrededor del eje central. Una abertura de entrada en la pared vertical de la cámara de eliminación de arenilla debajo de las placas en capas permite que el fluido y la arenilla entren en la cámara de eliminación de arenilla, y una abertura de efluente en la pared vertical de la cámara de eliminación de arenilla por encima de los sedimentadores de tubos permite que el fluido salga de la cámara de eliminación de arenilla.

Circular grit remover with tube settlers

A grit removal unit including a cylindrical grit removal chamber above a grit storage chamber, with an opening to the grit storage chamber through the grit removal chamber bottom. At least one layer plate is an inverted truncated cone around the center axis which is spaced from the grit removal chamber vertical wall to allow fluid flow therebetween. An array of tube settlers is supported in the grit removal chamber above the layered plates and around the center axis. An influent opening in the grit removal chamber vertical wall below the layered plates allows fluid and grit into the grit removal chamber, and an effluent opening in the grit removal chamber vertical wall above the tube settlers allows fluid to exit the grit removal chamber.

Circular parallel plate grit remover