US3321867A - Distributor for dense particulate material - Google Patents

Distributor for dense particulate material Download PDF

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Publication number
US3321867A
US3321867A US392868A US39286864A US3321867A US 3321867 A US3321867 A US 3321867A US 392868 A US392868 A US 392868A US 39286864 A US39286864 A US 39286864A US 3321867 A US3321867 A US 3321867A
Authority
US
United States
Prior art keywords
outlet
casing
objects
shot
wall
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.)
Expired - Lifetime
Application number
US392868A
Other languages
English (en)
Inventor
John C Singleton
Joseph P Klinck
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.)
Babcock and Wilcox Co
Original Assignee
Diamond Power Speciality
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 Diamond Power Speciality filed Critical Diamond Power Speciality
Priority to US392868A priority Critical patent/US3321867A/en
Priority to FR18166A priority patent/FR1436341A/fr
Priority to GB34846/65A priority patent/GB1093577A/en
Application granted granted Critical
Publication of US3321867A publication Critical patent/US3321867A/en
Assigned to BABCOCK & WILCOX COMPANY THE, A CORP. OF NJ. reassignment BABCOCK & WILCOX COMPANY THE, A CORP. OF NJ. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE:03/31/78 A CORP. OF NJ. Assignors: DIAMOND POWER SPECIALTY CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies

Definitions

  • the present invention relates to devices for distributing hard objects or particles such as steel shot, and particularly to improved means for achieving a relatively uniform and widely distributed spread of such particles Where a reliable uniformity of scattering is desired, as for example in the cleaning of tubular boilers and other heat exchanging apparatus. It has lbecome common to employ spherical shot of approximately 1Ai-inch diameter, which is permitted to cascade downwardly under the inuence of gravity over and among the tubes of superheaters, economizers, preheaters and other surfaces of heat exchanging apparatus to dislodge fouling materials.
  • An important object of the invention is to provide a distributing device of the indicated character which, while achieving a high degree of uniformity of distribution of the shot or other material, is so designed as to reduce to a minimum the tendency of the shot to cause undue wear of the distributing mechanism itself.
  • FIGURE l is a Viewl principally in -diarnetric longitudinal section but partly in side elevation of my preferred distributing mechanism
  • FIGURE 2 is a cross sectional view thereof taken substantially on the line II-II of FIGURE 1 and looking in the direction of the arrows.
  • reference character designates generally the Icylindrical casing of my improved distributor.
  • the casing 10 is formed of 4 inch standard pipe. In use it is supported on a vertical axis in a suitable position above the surface areas over which the shot is to be distributed.
  • the inlet pipe '12 through which the shot is delivered to the casing 10 may serve to support the latter.
  • the inlet pipe may be conventional 3 inch pipe, Welded to the upper end of the casing 10, the latter being necked inwardly to join the inlet.
  • the casing is also swaged or otherwise flanged inwardly, as indicated at 14, such in-flanged portion being sized to accept a re-entrantly projecting cylindrical member which in the preferred embodiment referred to is formed of 211/2 -inch standard pipe welded at its lower end to flange 14.
  • the wall detned by pipe section 15 forms the outlet orifice and also cooperates with the casing wall to dene an upwardly opening annular retarder pocket 16 within the casing and in which shot accumulates.
  • a shot inlet feed pipe 18 opens laterally into the vertical supporting inlet pipe 12 to permit the introduction of shot, which may be delivered to the pipe 13 through the agency of suitable transporting means such as a continuous hoist or lift (not shown).
  • a deector disc 20 which is somewhat smaller than the internal diameter of the casing but preferably larger than the internal diameter of the outlet orifice member 15.
  • Disc 20 is provided with a top surface portion 21 which slopes angularly outwardly and downwardly in all directions at an acute angle to the horizontal and is supported in axial position in the casing by an axially extending rod or pipe, shown as a depending sup- ICC porting pipe 22.
  • the support- :ing pipe portions 12 and 22 may be carried from their tops (not shown) by suitable flanges and/or weldments or other appropriate conventional mechanical attachment to the supporting structure of the boiler setting or other heat exchanger structure.
  • a tubular nozzle member 25 extends through the side walls of casing 10, outlet member 15, the outlet end of nozzle member 25 discharging within outlet member 15 in a position relatively close to and substantially tangential with respect to the inner wall of member 15.
  • Nozzle 25 is supplied with a suitable fluid such as air through a pipe 26.
  • Nozzle member 25 is spaced below the top of outlet member 15.
  • the nozzle member is shown with its axis horizontal and has been successfully operated in such position under conditions which will be referred to hereinafter, the nozzle may be sloped upwardly or downwardly -to increase or decrease the downward component of gravity on the shot, as the design considerations of the particular installation may make preferable.
  • the iirst shot entering through the pipe 18 falls freely within t-he casing 10 until it either strikes the deilector surface 21 or, if it misses the deilector plate, strikes the shot which is normally present in the retarder box dened by the annular space 16, the shot which first strikes the deflector disc 20 is retarded and bounces upwardly and radially. Under normal conditions a sufcient quantity of shot is constantly striking and bouncing upwardly from the deflector disc so that the great majority of the shot is arrested by other shot ⁇ before it could strike the disc 20.
  • the shot so arrested, then ows downwardly around the disc 20 and onto the accumulated shot in the retarder box section 16, and then overflows inwardly and downwardly into the open upper end of outlet member 15.
  • the shot thus enters member 15 substantially free from gravitational acceleration yet without having severely impacted any portions of the distributor structure.
  • the nozzle 25 imparts an angular orbital velocity to the shot, which is whirled by the air blast in the lower portion of member 15, and due to its angular velocity the whirled shot is projected outwardly by centrifugal force as it leaves the lower end of outlet 15. It will be noted, however, that some of the shot which enters the upper end of outlet member 15 is required to pass over the top of air nozzle 25, which thereby positively assists in directing some of the shot inwardly toward the center. Due to such detlecting tendency of the nozzle 25, and the relatively large volume of shot, some of the shot which falls downwardly near the axis of member 15 receives little or no angular acceleration from the air blast and thus falls more nearly straight, to cover the more central areas of the pattern of distribution.
  • deilector has a downwardly and outwardly sloping top surface lying at an acute angle to the horizontal whereby objects falling thereupon tend to bounce upwardly and outwardly toward the wall of the casing and thereby obstruct the free fall of other objects through the casing.
  • the means for delivering fluid comprises a nozzle member partially obstructing the outlet whereby a certain number of objects overliowing from the receptacle are required to pass over the nozzle member toward the center of the outlet.
  • the means for delivering iiuid includes a conduit element eX- tending through the casing and opening through said wall at a position below the top of the receptacle, whereby objects accumulating in the receptacle cover said conduit element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cleaning In General (AREA)
US392868A 1964-08-28 1964-08-28 Distributor for dense particulate material Expired - Lifetime US3321867A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US392868A US3321867A (en) 1964-08-28 1964-08-28 Distributor for dense particulate material
FR18166A FR1436341A (fr) 1964-08-28 1965-05-24 Distributeur pour matière particulaire dense
GB34846/65A GB1093577A (en) 1964-08-28 1965-08-13 Improved distributor for solid objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US392868A US3321867A (en) 1964-08-28 1964-08-28 Distributor for dense particulate material

Publications (1)

Publication Number Publication Date
US3321867A true US3321867A (en) 1967-05-30

Family

ID=23552343

Family Applications (1)

Application Number Title Priority Date Filing Date
US392868A Expired - Lifetime US3321867A (en) 1964-08-28 1964-08-28 Distributor for dense particulate material

Country Status (3)

Country Link
US (1) US3321867A (fr)
FR (1) FR1436341A (fr)
GB (1) GB1093577A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479439A1 (fr) * 1980-03-25 1981-10-02 Taprogge Reinigungsanlagen Procede de nettoyage des tubes de condenseurs de centrales d'energie, notamment de centrales electriques, et condenseur pour mettre en oeuvre ce procede
EP0102430A1 (fr) * 1982-09-07 1984-03-14 Metal Improvement Company Inc. Appareil de grenaillage ou de sablage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1512140A (en) * 1923-07-09 1924-10-21 Schaub Otto Rock boring
US2440643A (en) * 1945-03-14 1948-04-27 George F Pettinos Sandblast nozzle
US2532655A (en) * 1949-09-27 1950-12-05 Backer Stanley Method of sandblasting

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1512140A (en) * 1923-07-09 1924-10-21 Schaub Otto Rock boring
US2440643A (en) * 1945-03-14 1948-04-27 George F Pettinos Sandblast nozzle
US2532655A (en) * 1949-09-27 1950-12-05 Backer Stanley Method of sandblasting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479439A1 (fr) * 1980-03-25 1981-10-02 Taprogge Reinigungsanlagen Procede de nettoyage des tubes de condenseurs de centrales d'energie, notamment de centrales electriques, et condenseur pour mettre en oeuvre ce procede
EP0102430A1 (fr) * 1982-09-07 1984-03-14 Metal Improvement Company Inc. Appareil de grenaillage ou de sablage

Also Published As

Publication number Publication date
FR1436341A (fr) 1966-04-22
GB1093577A (en) 1967-12-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BABCOCK & WILCOX COMPANY THE, A CORP. OF NJ.

Free format text: MERGER;ASSIGNOR:DIAMOND POWER SPECIALTY CORPORATION;REEL/FRAME:003854/0861

Effective date: 19780331

Owner name: BABCOCK & WILCOX COMPANY THE, A CORP. OF NJ., NEW

Free format text: MERGER;ASSIGNOR:DIAMOND POWER SPECIALTY CORPORATION;REEL/FRAME:003854/0861

Effective date: 19780331