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WO2020214147A1 - Système d'élimination et de collecte de particules de poussière - Google Patents

Système d'élimination et de collecte de particules de poussière Download PDF

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Publication number
WO2020214147A1
WO2020214147A1 PCT/US2019/027532 US2019027532W WO2020214147A1 WO 2020214147 A1 WO2020214147 A1 WO 2020214147A1 US 2019027532 W US2019027532 W US 2019027532W WO 2020214147 A1 WO2020214147 A1 WO 2020214147A1
Authority
WO
WIPO (PCT)
Prior art keywords
dust
hood
upstream
air
hood assembly
Prior art date
Application number
PCT/US2019/027532
Other languages
English (en)
Inventor
Peter C. Berveiler
Martin E. Boros
Original Assignee
BGRS, Inc.
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 BGRS, Inc. filed Critical BGRS, Inc.
Publication of WO2020214147A1 publication Critical patent/WO2020214147A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/60—Devices for separating the materials from propellant gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18—Preventing escape of dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/18—Cleaning-out devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • E21B43/2607—Surface equipment specially adapted for fracturing operations

Definitions

  • the present invention relates to de-dusting proppant and collecting dust particles. More particularly, the present invention relates to systems to collect dust particles formed during the movement of a volume of particulate material, such as a proppant used in an oilfield fracking operation.
  • particulate materials such as sand or proppant.
  • Particulate materials may be moved from storage receptacles to delivery receptacles using powerful air-movers, conveyor belts, gravity flows and/or other mechanisms.
  • Moving a large volume of particulate material using air-movers causes the agitation of granular solids as the material is moved through hoses, ducts, chutes and containers.
  • air-movers such as a pressure blower delivery assembly
  • Such agitation may produce dust particles which may be inhaled by operations personnel or sucked into mechanical equipment. Air-born particles, of very small dimensions may not settle quickly and may remain airborne for an extended period of time. Inhalation by operations personnel may have a negative health impact, and mechanical equipment may be damaged by the dust particles clogging filters and reducing air flow to the equipment.
  • Existing vacuum and other containment systems may be implemented through the use of a hood assembly attached to a delivery chute to reduce the amount of micro-particles or dust.
  • a hood assembly attached to a delivery chute to reduce the amount of micro-particles or dust.
  • directed air-flow, updrafts, and negative pressure is applied inside of the hood directing the micro-particles and dust into a dust collection assembly and one or more receptacles to receive and collect the dust.
  • Flexible curtains may be used to contain the air-born particles until they are collected by the directed air- flow, updrafts, and negative pressure of the containment system.
  • the suction point of these systems may exist inside of the hood assembly and, as such, create upward turbulent air flow of the micro-particles or dust and downward or crossways for heavier particles being delivered to the delivery site or receptacle.
  • the undirected cross-flow source air through these materials delays the separation of the dust from the usable material and results in an inefficient delivery of material and collection of damaging dust.
  • Embodiments disclosed herein include a compact hood that attaches to an open or closed discharge chute with a known or controlled air source that more efficiently and more effectively removes dust particles from the air upstream of the end of the existing-equipment discharge point and maximize delivery usable particulate materials to a delivery point.
  • a system for capturing dust particles, while minimizing the capture of usable proppant may include a hood assembly defining an orifice sized and shaped to receive a delivery chute.
  • the system also may include a dust receptacle coupled to the hood.
  • the dust receptacle may be in fluid communication with an air-mover that is configured to provide suction to the hood.
  • An upstream de-dusting encasement may be affixed to the hood and secured to the delivery chute by a fastener.
  • the upstream de-dusting encasement may be sized and shaped to match the geometry of the delivery chute.
  • the encasement may have a de-dusting air-intake configured to produce a suction point, from the air mover, upstream of the hood.
  • a dust collection assembly for collecting dust-laden air produced by the agitation of a particulate material.
  • the assembly may comprise a hood assembly defining an orifice to match an external geometry of a delivery chute and a dust receptacle coupled to the hood.
  • the dust receptacle in fluid communication with an air-mover configured to provide suction to the hood.
  • the assembly may further include an upstream pick up affixed to and extending upstream from the hood.
  • An upper portion of the upstream pick-up may be sized and shaped to match an internal geometry of the delivery chute.
  • the upstream pick- up may comprise a diffuser in an upstream-facing wall.
  • the assembly also may include a receiving fastener affixed to the hood and configured to receive and secure the delivery chute to the hood assembly.
  • Additional features of the de-dusting assembly may include a pressure diffuser disposed between the delivery chute and the dust receptacle, a pick-up shaped to match the geometry of the delivery chute and affixed to the hood about the orifice, a flexible curtain affixed to a lower portion of the hood, an auxiliary suction hood in fluid communication with the air mover, a collector in fluid communication with the dust receptacle, a conduit establishing the fluid communication between the dust receptacle and the collector, and vents disposed in the upstream encasement.
  • FIG. 1 is a perspective view of a dust control system 100 according to an embodiment of the invention.
  • FIG. 2 is a bottom-perspective view of the dust-collection system depicted in Fig. 1.
  • FIG. 3 depicts an extended dust control system according to an embodiment of the invention.
  • FIG. 4 is a front elevation view of a dust control system according to an embodiment of the invention.
  • FIG. 5 is a side elevation view of a dust control system according to an embodiment of the invention.
  • FIG. 6 is a side elevation of a dust control system according to an embodiment of the invention.
  • FIG. 7 is a side elevation of a dust control system according to an embodiment of the invention.
  • FIG. 8 is a perspective view of a dust control system according to an embodiment of the invention.
  • FIG. 9 is an exploded view of a dust control system according to an embodiment of the invention.
  • FIG. 10 is a front view of a dust control system according to an embodiment of the invention.
  • FIG. 11 is a side elevation of a dust control system according to an embodiment of the invention.
  • Fig. 12 is a exploded view of a dust control system according to an embodiment of the invention.
  • Embodiments of the present invention include an active dust control system that may operate by removing dust laden air from a particulate handling transfer system with the use of a vacuum blower or fan, interconnecting ductwork and a de-dusting hood.
  • ultrafine dust may be generated during oil field operations, such as the movement of proppant through physical or pneumatic conveying on an oilfield fracking site.
  • the proppant is a particulate material, and when the particles collide, fragments of the particles that break or shear off during collisions become ultrafine dust.
  • the ultrafine dust has particles small enough to become airborne and persist in the atmosphere for a prolonged period of time.
  • the dust particles may be made up of silica, chief cause of silicosis, and particularly silica in planar and sub rounded forms from collisions in multiple processes leading to the introduction of proppant into the fracking fluid mixing device.
  • the ultrafine particles can pass through many forms of containment and present an inhalation hazard to humans and animals and cause additional required maintenance to other non-associated engines, pumps and other devices using ambient air as a source.
  • particulate matter departs from a bulk storage container or vessel and is moved to a material receiving hopper through a series of belts or pneumatically-driven systems to deposit via gravity through an open or closed chute into a mixing or receiving hopper.
  • the ultrafine dust may be released into and sustained in the atmosphere as the proppant leaves the discharge chute and as the particulate matter lands in the mixing or receiving hopper.
  • aspects of the dust control system described herein may include any vacuum generation device sufficient to provide appropriate flow, any conduits and ductwork capable of providing sufficient high flow and moderate vacuum, and a de-dusting hood disposed over the mixing or receiving hopper.
  • Light ultrafine silica or dust particles typically remain in the air longer than heavier particles and can travel substantial distances in the air if not contained.
  • the de-dusting hood may be used to limit the migration of the ultrafine proppant dust and air conveyed into the mixing or receiving hopper, and to direct air flow and dust-laden air up and into the ductwork connected to a chute above the mixing or receiving hopper and onto a dust collection system or collector.
  • Fig. 1 is a perspective view of a de-dusting dust capture and control system 100 according to an embodiment of the invention.
  • the dust control system 100 may include a de-dusting hood assembly 101 forming a substantially enclosed area formed by a top wall 102, a front wall 104, and sidewalls 106, 108, all of which may be considered to be a part of the hood or hood transition prior to discharge of proppant into the receiving or blending hopper.
  • An upstream encasement 112 may be coupled to the top wall 102 and may be sized and positioned to substantially surround the chute 110 delivering the proppant.
  • the upstream extension/encasement 112 may be coupled or secured to the chute 110 by one or more straps 114, clamps, bolts, or other suitable fasteners required to connect to and enclose an open-top conveyance and control airflow into and out of the de-dusting equipment.
  • the upstream encasement 112 may be further coupled to the delivery chute 110 by a supporting bracket 116 extending through and from a substantially perpendicular flange 118 and wrapping around an upper portion of the chute 110. Proppant delivered through the chute 110 may flow into the enclosed area formed by the upstream encasement 112 and de-dusting hood 101 toward the receiving hopper or delivery site.
  • the upstream encasement 112 of the proppant discharge chute 110 may inhibit cross-draft during transfer of proppant and dust- laden air from the delivery chute 110, and assist in maintaining a more- laminar flow along the chute 110 into the de-dusting hood 101.
  • the top portion of the de-dusting hood 101 may include one or more dust receptacles 120 coupled to a tube or duct 122 to direct the dust particles away from the receiving hopper and toward a dust collector.
  • the de-dusting hood 101 may be paired with a series of purpose-fit sized flexible or rigid ductwork, such as tubing 122, with flow control devices and a fixed- or variable-speed dust collector, depending on application, to optimize capture efficiency of ultra- fine and fine dust, and minimize capture of desirable proppant particles.
  • An air mover may draw, via suction, vacuum or other drawing force, the dust-laden air from the volume below the de dusting hood through the tubing 122 and move the dust- laden air to the dust collector.
  • the tubing 122 may be flexible tubing (e.g., polymer tubing, flexible metal, etc.) to simplify installation of the system and promote the efficient movement of dust-laden air to a dust collector. While the illustrated embodiment includes one dust receptacle 120, in other embodiments any suitable number of dust receptacles extending from the top of the de-dusting hood section 101.
  • the de-dusting hood may include flexible curtains 124 extending downwardly from the bottom of the de-dusting hood 101 toward the receiving hopper or delivery site.
  • the curtain 124 may be formed from flexible sheets (e.g., plastic) to form a volume between the de-dusting hood 101 and the delivery hopper that may shape the incoming flow of air to inhibit cross draft and loss of ultrafine particles.
  • the curtain 124 may be a single unit having no gaps and wrapping around the perimeter of the de-dusting hood or a portion of the perimeter.
  • the curtain 124 may include multiple strips or sections that are independently moveable from one other.
  • the curtain 124 may be positioned and aligned to block the dust particles from dispersing out and away from the area below the de-dusting hood 101 thereby enhancing the collection of dust.
  • the hood assembly 100 may be lowered into a receiving hopper such that the curtain 124 is in contact with a proppant pile delivered to the receiving hopper.
  • the dust particles may be contained within the volume inside the curtain 124 as the proppant flows from the chute 110 to the proppant pile.
  • a flexible curtain with minimal air inlets to minimize cross-draft 126 may be coupled to the de-dusting hood 101 near the back side of the de-dusting hood 101 and the end of the delivery chute 110.
  • Fig. 2 is a bottom-perspective view of the de-dusting dust-collection system 100 depicted in Fig. 1.
  • the straps 114 may couple the upstream encasement to the delivery chute 110.
  • the bottom- perspective view depicts the flexible curtain 126 in greater detail.
  • the flexible curtain 126 may include a coupling edge 128 sized and shaped to match the outer perimeter or circumference of the delivery chute 110 to form a sealing engagement with the chute 110 and a more enclosed volume immediately below the de-dusting hood 101.
  • the curtain 126 may include multiple fins or flaps 130 promoting the flexibility of the curtain and the directionality of proppant flow.
  • the de-dusting dust collection system 100 may be adapted to fit an existing delivery chute 110 that is substantially round with angled elbow 132.
  • the upstream encasement may be clamped over the existing delivery chute 110 and take advantage of active vents to control and dictate air-flow from the delivery chute 110 through the upstream encasement 112 and de-dusting hood 101.
  • Fig. 3 depicts an extended dust control system 300 according to an embodiment of the invention.
  • the dust control system 300 may include several of the components of the system previously described in conjunction with Figs. 1-2, including the de-dusting hood 101, the upstream encasement 112, straps 114, support bracket 116 and the flexible curtain 124.
  • auxiliary suction hoods 134, 136 may be
  • auxiliary suction hoods 134, 136 may be used to provide further
  • each auxiliary suction hood 134, 136 may include one or more dust receptacles 138.
  • the auxiliary suction hoods 134, 136 may be coupled to the de-dusting hood by support brackets 144 The support brackets 144 may position the auxiliary suction hoods 134,
  • the dust receptacles 138 may be coupled to the auxiliary suction hoods 134, 136 extending upward toward the top of the de-dusting hood 101.
  • the auxiliary suction hoods 134, 136 include sloped walls 140 extending upward and converging to outlets 142.
  • Outlets 142 may be coupled to ductwork or tubing in communication with the air- mover suction force.
  • Suction may be provided by an air-mover or other vacuum force to the auxiliary suction hoods 134, 136. In this manner, dust captured by the dust receptacles 138 is channeled upward through the auxiliary suction hoods 134, 136 and into the ducting leading to the dust collector.
  • Fig. 4 is a front elevation view of a dust control system 400 according to an embodiment of the present invention.
  • the de-dusting hood 101 is defined at least in part by the front wall 104, and side walls 106, 108.
  • the de-dusting hood 101 of the present embodiment includes two dust receptacles 120.
  • the de-dusting hood portion of the dust control system 400 may be cantilevered over or lowered slightly into the receiving hopper such that the curtain 124 is in contact with the proppant in the receiving hopper, or such that the curtain 124 is closely positioned to the proppant in the receiving hopper.
  • Fig. 5 is a side elevation view of a dust control system 500 according to an embodiment of the present invention.
  • the chute 110 is coupled to the upstream encasement 112 using straps 114 and a fitting engagement by which the chute 110 may be slidingly or otherwise engaged with a bottom portion 146 of the upstream encasement and engaged with an appropriate size orifice in the rear wall of the de-dusting hood 101.
  • An upper portion 148 of the upstream encasement 112 may include or form an ambient air intake 150 to assist in directing the flow of dust laden air into the de-dusting hood 101.
  • the upstream encasement 112 may extend down and over the delivery chute 110 such that as the proppant travels down the chute 110, dust laden air may rise to the upper portion of the upstream encasement 112 into the de-dusting hood 101, into the dust receptacle 120 and onto the dust collector via the airflow B.
  • Proppant discharge D may flow through the bottom portion 146 of the upstream encasement 112 and fall through the volume defined by the flexible curtains 124 and into the receiving hopper 152.
  • Additional ambient air A may be drawn up and under the flexible curtain 124 pushing dust laden air into the de-dusting hood 101.
  • the sloped design of the de-dusting hood 101 may further assist in drawing the dust laden air upwards and into the dust receptacles 120.
  • auxiliary suction hoods While the embodiment depicted in Fig. 5 is depicted without auxiliary suction hoods, one skilled in the art will appreciate that such additional components may be added or removed without deviating from the scope of the invention. In certain instances, the auxiliary suction hoods have been omitted for purposes of clarity.
  • the implementation of the upstream encasement provides a technical advantage to dust collection systems by moving the suction point of dust laden air from directly below the dust receptacles of the de-dusting hood to a point further upstream.
  • the present embodiment through the use of the ambient air intake 150 into the upper portion of the upstream encasement 112, begins to separate the dust laden air from the proppant flow before the proppant arrives at the de-dusting hood.
  • the proppant and dust laden air arrive at the hood, much of the dust laden air is already captured by the air flow through the upper portion 148 of the upstream encasement 112.
  • the dust laden air then is more easily and efficiently captured by the suction of the dust receptacles 120 and avoids the turbulent cross-flow of particulate matter with dust-laden air.
  • a diffuser 154 may be implemented in the de-dusting dust collection system to further aid the capture and removal of dust laden air.
  • the present embodiment may include a diffuser 154 in the upstream encasement 112.
  • the diffuser 154 may be in the form of a screen, perforated metal sheets or other airflow reduction device.
  • the diffuser 154 may provide a pressure drop prior to entry into the de-dusting hood 101 in order to maintain a laminar air flow.
  • the laminar air flow reduces the escape of the ultra-fine dust due to uplift and downdraft without cross-draft, where ultrafine particles may rebound into the air-stream as the larger, desired proppant particulate flow lands in the receiving hopper 152.
  • This setup may provide a continuous stream of air to maintain entrainment of the ultrafine dust while reducing the collection of usable proppant in the dust collector to the extent practical.
  • Fig. 6 is a side elevation of a dust control system 600 according to an embodiment of the invention.
  • the present embodiment may include a de-dusting hood 101, dust receptacle 120, flexible curtain 124 and receiving hopper 152, as previously described. Additionally, the present embodiment may include a vented discharge chute 110 with an upstream dust pick-up 156.
  • the delivery chute 110 through which the proppant is delivered, may include one or more vents 158 around and along the delivery chute 110 to allow ambient air flow to enter the chute 110 and assist in creating an appropriate air flow of proppant and dust laden air into the de-dusting hood 101.
  • the vents 158 may be placed around the circumference of the chute 110 to promote efficient and consistent airflow.
  • the vents 158 may be placed on the top surface and on opposing sides of the delivery chute 110.
  • the vents 158 may be screened or otherwise protected to ensure no dust laden air escapes the chute 110.
  • the vents may be mechanically operated and adjusted to control ambient air intake and thusly establish and maintain an appropriate air flow through the delivery chute.
  • the upstream pickup 156 may be a formed structure extending from the rear wall of the de-dusting hood 101 and having a geometry matching that of the inside surface of the delivery chute.
  • the dust laden air DL may be directed and controlled by the introduction of ambient air flow through the vents 158 to pass through the diffuser 154 of the upstream pick-up 156.
  • the upstream facing wall of the pick-up 156 may include a diffuser screen to provide an adequate pressure drop as the dust laden air flows through the chute 110 and into the de-dusting hood.
  • the proppant discharge D may flow by gravity through the chute 110 and into the receiving hopper 152.
  • the intake of ambient air A up through the volume defined by the flexible curtain 124 may also aid in creating upward air flow of dust laden air into the de-dusting hood.
  • Figs. 7-10 depict dust control systems 700, 800 according to an embodiment of the present invention.
  • the dust control systems 700, 800 may include an upstream encasement with a rectangular cover 160 placed over a rectangular delivery chute 110.
  • the dust control system 700 may include a de-dusting hood 101, upstream pick-up 156, one or more dust receptacles 120 and flexible curtains 124 as previously described.
  • the de-dusting hood 101 of the system 800 depicted in Figs. 8-10 may be substantially triangular and include dust receptacles 120 extending angularly from the top angled wall of the hood 101.
  • the de-dusting dust control system 700 may further include additional curtains 125 extending up the upstream encasement cover 160.
  • the additional curtains 125 when the dust control system 700 is coupled to an open-air delivery chute, may drape over the side of the delivery chute to provide containment of the proppant and dust laden air as it arrives to the de-dusting hood 101.
  • Ambient air A drawn up from below the flexible curtains 124, 125 may also assist the airflow of the system.
  • the dust laden air DL may rise within the covered upstream encasement and, aided by vents 158 in the cover 160 of the upstream encasement, flow through the diffuser 154 of the upstream pick-up 156 and into the upper portion of the de-dusting hood to be collected by the suction of the dust receptacles 120.
  • the upstream pick up 156 may be formed of upstream facing walls 162, 166 and downward facing angular walls 164 to avoid collection of proppant and direct the flow of dust laden air through the upstream encasement and into the de-dusting hood 101.
  • the upstream facing walls 160, 166 and downward facing walls 164 may include diffusers 154 or perforations or other similar inducement of a drop in pressure as the dust laden air travels through the system.
  • Figs. 11-12 depict a dust control system 1100 according to one embodiment of the present invention.
  • the dust control system 1100 may include a de-dusting hood 101, dust receptacle 120, flexible curtain 124 and receiving hopper 152 as previously described.
  • the present embodiment may include an upstream dust pick up 156 extending from the rear wall of the de-dusting hood 101.
  • a delivery chute 110 may be affixed directly to the de-dusting hood 101 whereby the upstream dust pick up 156 is surrounded by the chute 110.
  • the chute 110 may be coupled or affixed to a mounting bracket 168 of the de-dusting hood 101.
  • the mounting bracket may include bolts 170 for receiving flanges 172 of the chute and fasteners, such as nuts 174.
  • proppant and dust laden air may flow through the delivery chute 110 whereby the heavier proppant flows along the bottom of the chute 110, down through the de-dusting hood and flexible curtains 124 and into the receiving hopper 152.
  • the lighter and more air-borne dust laden air may flow along the upper portion of the chute 110 until it meets the diffuser 154 of the upstream pick-up 156 where the dust laden air undergoes a pressure drop as it passes into the de dusting hood, where it is subsequently drawn up to the dust receptacles 120 by the suction force of an air mover and an updraft of ambient air A.
  • the embodiments described herein include systems with a de-dusting hood with flexible air curtains and proppant discharge chute, or chute cover, that shape the source airflow entering the area above the receiving hopper to control the flow direction of dust-laden air.
  • the described embodiments create less turbulent air currents to keep the dust entrained in the air stream while the dust-laden air travels through the ductwork and conduits into a dust collector unit, rather than falling out onto surfaces or entering the atmosphere prior to reaching the receiving hopper.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Prevention Of Fouling (AREA)

Abstract

La présente invention, selon certains modes de réalisation, concerne un système de capture de poussière et d'air chargé de poussière provoqué par l'agitation, le déplacement ou le transfert de matière particulaire. Le système comprend un ensemble de collecte de poussière placé à proximité de l'émission de matière particulaire et associé à cette dernière servant à capturer des particules de poussière libérées par le déplacement et la sédimentation de la matière particulaire lors de sa distribution et de son émission. L'ensemble de collecte de poussière est positionné pour diriger un flux d'air dans un trajet d'écoulement recouvrant les particules de poussière pour capturer les particules de poussière et pour éloigner les particules de poussière de l'agent de soutènement, réduisant ainsi le risque d'exposition à la poussière.
PCT/US2019/027532 2019-04-13 2019-04-15 Système d'élimination et de collecte de particules de poussière WO2020214147A1 (fr)

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US15/952,653 2019-04-13

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Cited By (2)

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CN114772327A (zh) * 2022-05-15 2022-07-22 徐州三叉戟信息科技有限公司 一种具有全自动化智能消尘装置的煤炭输送设备
US11530090B2 (en) 2021-04-15 2022-12-20 Rocky Mountain Investor Holdings, Inc. Reloadable containerized system for wet and dry proppants and methods of making and using same

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US4061221A (en) * 1976-02-13 1977-12-06 Hitachi Metals, Ltd. Dust controlling loading chute apparatus for particulate material
US4521232A (en) * 1981-01-07 1985-06-04 Howeth David Franklin Air filter unit with multiple filter chambers and particulate material collection hoppers
US4811889A (en) * 1987-01-13 1989-03-14 Rijnstaal B.V. Method and apparatus for the manufacture of powder-filled steel tube from steel strip
US5154271A (en) * 1991-07-10 1992-10-13 Svedala Industries, Incorporated Telescopic chute
US20170247209A1 (en) * 2016-01-06 2017-08-31 Oren Technologies, Llc Conveyor with integrated dust collector system

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Publication number Priority date Publication date Assignee Title
US4061221A (en) * 1976-02-13 1977-12-06 Hitachi Metals, Ltd. Dust controlling loading chute apparatus for particulate material
US4521232A (en) * 1981-01-07 1985-06-04 Howeth David Franklin Air filter unit with multiple filter chambers and particulate material collection hoppers
US4811889A (en) * 1987-01-13 1989-03-14 Rijnstaal B.V. Method and apparatus for the manufacture of powder-filled steel tube from steel strip
US5154271A (en) * 1991-07-10 1992-10-13 Svedala Industries, Incorporated Telescopic chute
US20170247209A1 (en) * 2016-01-06 2017-08-31 Oren Technologies, Llc Conveyor with integrated dust collector system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11530090B2 (en) 2021-04-15 2022-12-20 Rocky Mountain Investor Holdings, Inc. Reloadable containerized system for wet and dry proppants and methods of making and using same
US11697550B2 (en) 2021-04-15 2023-07-11 Rocky Mountain Investor Holdings, Inc. Reloadable containerized system for wet and dry proppants and methods of making and using same
US11772886B2 (en) 2021-04-15 2023-10-03 Rocky Mountain Investor Holdings, Inc. Reloadable containerized system for wet and dry proppants and methods of making and using same
US12234084B2 (en) 2021-04-15 2025-02-25 Rocky Mountain Investor Holdings, Inc. Reloadable containerized system for wet and dry proppants and methods of making and using same
CN114772327A (zh) * 2022-05-15 2022-07-22 徐州三叉戟信息科技有限公司 一种具有全自动化智能消尘装置的煤炭输送设备

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