US3399662A - Multisection combustion grate with lateral sealing means - Google Patents

Multisection combustion grate with lateral sealing means Download PDF

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Publication number
US3399662A
US3399662A US623742A US62374267A US3399662A US 3399662 A US3399662 A US 3399662A US 623742 A US623742 A US 623742A US 62374267 A US62374267 A US 62374267A US 3399662 A US3399662 A US 3399662A
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United States
Prior art keywords
grate
combustion
disks
sections
sealing
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
US623742A
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English (en)
Inventor
Holstein Richard
Voigt Herbert
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.)
Haniel and Lueg GmbH
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Haniel and Lueg GmbH
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Filing date
Publication date
Application filed by Haniel and Lueg GmbH filed Critical Haniel and Lueg GmbH
Application granted granted Critical
Publication of US3399662A publication Critical patent/US3399662A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
    • F23H7/10—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding rocking about their axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/003—Stepped grates with rotatable or slidable gratebars

Definitions

  • the disclosure relates to multisection combustion grates and particularly to such grates which are useful for burning refuse and the like which constitute inferior and highly ballast-rich fuels.
  • the principal feature of the disclosure is the provision of circular sealing disks at laterally opposite ends of each grate section, these sealing disks cooperating with stationary sealing means, such as the walls of a combustion chamber, to provide a maze sealing against entry of combustion air into the combustion chamber around the grate section pivoting means, and to prevent exit of combustible gases from the combustion chamber around the grate pivoting means.
  • each disk may be arranged not only to form a seal for its associated grate section but also to overlap an adjacent grate section.
  • the disks may be mounted in common recesses in the inner surface of the combustion chamber wall, or may be mounted in individual recesses, the recesses conforming in outline to the disks positioned therein, Alternatively, each disk may be arranged in a separate cup-shaped stationary sealing member which is in sealing relation with the wall of the combustion chamber.
  • the invention is directed to combustion grates and, more particularly, to an improved multisection combustion grate including oscillatable sections and provided with novel sealing means against entry of air and exit of combustion gases laterally of the combustion chamber.
  • a satisfactory screening of the grate sections against such air entry and combustion gas leakage is provided by means of disks at 3,399,662 Patented Sept. 3, 1968 the laterally opposite ends of the individual grate sections.
  • the circumference of these disks is a circular arc concentric with the oscillation axis of the associated grate section, and the disks, together with a stationary cover, form a maze screen.
  • Such a screen is formed, for example, by setting the lateral sealing disks, which are oscillatable with the grate section, into recesses in the lateral walls of the combustion chamber and with very little play.
  • the lateral sealing disks of the present invention do not require any substantial additional expense if the oscillation drive of the grate sections is also effective on the lateral sealing disks. It is not necessary to discard the arrangement of the swing drives at the outside of the walls of the combustion chamber, provided that each swing drive acts on the pivot pin or axle of the lateral sealing disks which support the grate sections at laterally opposite ends, these pivot pins or axles being concentric with the swinging axes of the associated grate sections.
  • the invention has the same advantages for all combustion grates utilizing oscillatable sections and independent of the fuel involved.
  • an object of the invention is to provide an improved combustion grate for burning garbage and other refuse constituting inferior and highly ballast-rich fuels.
  • Another object of the invention is to provide such a combustion grate including several grate sections which are oscillatable about axes extending transversely of the grate and further including sealing means sealing each section at laterally opposite ends thereof.
  • a further object of the invention is to provide such a multisection combustion grate in which the lateral sealing means are disks disposed in recesses in the walls of a com-bustion chamber.
  • Still another object of the invention is to provide such a combustion gate which is simple and operationally safe, as well as ensuring the stream of combustion air being distributed substantially uniformly over the width of the grate and entering the grate only from below.
  • FIG. 1 is a side elevation view of a portion of a combustion grate illustrating several oscillatable grate sections and the associated lateral sealing disks;
  • FIG. 2 is a partial plan view of the combustion grate shown in FIG. 1 and the associated sealing disks;
  • FIG. 3 is a view, similar to FIG. 2, illustrating a modified form of grate section
  • FIG. 4 is a vertical sectional view of a grate illustrating a modification of the maze scaling for the grate sections.
  • oscillatable grate sections 1 alternate with relatively stationary bridging grate sections 2.
  • Grate sections 1 are swin'gable about transversely extending axes 3, with the range of swinging or oscillation being indicated by the arrow 4.
  • the drive for effecting such oscillation may comprise, for example, fluid pressure actuators 5 whose pistons are connected to the respective grate sections 1.
  • each grate section 1 has associated therewith, or constructcd as a parat thereof, a sealing disk 6. These disks are set in a recess 7 in the side wall 8 of the combustion chamber, this recess having a circular arc outline concentric to the axis 3.
  • each oscillation axis 3 is arranged beyond the circular arc outline of the associated grate section 1, as by being at the center of the circular arc outline.
  • disks 6 form a maze constituting a resistance to the fiow of combustion air and which resistance is substantially greater than that of the passages within the grate surface. Thus, this maze forms a seal preventing the formation of lateral jets of combustion gas.
  • each of the drive mechanisms includes a pivot arm 9 having a free end connected to the associated fluid pressure actuator 5, and having its fixed end secured to the pivot pin 6' of the lateral disks 6.
  • disks 6 are oscillated along with grate sections 1.
  • disks 6 may comprise fireproof cast iron with a steel support construction inserted therein. This facilitates transmission of the drive power from the actuators 5 to the oscillatable grate sections 1, and furthermore is particularly advantageous with respect to heat protection.
  • the axis of oscillation is not located as shown in FIGS. 1 and 2.
  • the axis of oscillation 3 of the grate sections 1 may be arranged within the circular sector-shaped outline or side elevation of the grate sections.
  • the sealing disks 6 may be set individually into respective recesses 7' in the side wall 8 of the cumbustion chamber.
  • FIG. 4 shows an arrangement in which each of the lateral sealing disks 6 is disposed in a stationary sealing cover 10 fixedly mounted on the inner surface of the side wall 8 of the cumbustion chamber.
  • Cover 10 closely conforms to and embraces disk 6, and also forms a maze sealing which has the same efiect as the embodiments of the invention shown in FIGS. 1, 2 and 3. Whether the embodiment of FIG. 2 or the embodiment of FIG. 4 is selected for any particular installation, is dependent upon the prevailing conditions, taking into consideration the construction of the side wall 8 of the combustion chamber and the combustion chamber arranged above the grate.
  • a combustion grate particularly for plants burning refuse, and having plural grate sections arranged in series in the direction of fuel conveyance, with each grate section having, in side elevation, a circular sector profile including acircular arc andbein-g mounted for oscillation about an axis transverse to the direction of fuel conveyance; means for screening the grate sections against lateral'entry of combustion air, said means comprising, in combination, disks arranged laterally of each grate section, the circumference of each disk being a circular arc concentric with the axis of oscillation of the associated grate section; and stationary sealing means cooperable with said disks and forming a maze sealing therewith.
  • a combustion grate as claimed in claim 1, including a combustion chamber in which said grate is arranged, said combustion chamber having side walls; each of said disks being set in recesses in said side walls.
  • a combustion grate as claimed in claim 1, in which each of said disks and its associated stationary sealing means overlaps at least one immediately adjacent grate section.
  • a combustion grate as claimed in claim 1, in which said plural grate sections include relatively stationary grate sections alternating, in the direction of fuel conveyance, with said oscillatable grate sections; each of said disks overlapping the immediately adjacent relatively stationary grate section.
  • a combustion grate as claimed in claim 4, in which each of said disks also overlaps the immediately succeeding oscillatable grate section.
  • a combustion grate as claimed in claim 1, including drive means operable to oscillate said grate sections; each drive means being operatively connected to the associated grate section through the disk associated with the latter.
  • each of said oscillation axes is concentric with said circular sector profile but positioned outside said circular section profile.
  • each disk has a pivot pin concentric with the axis of oscillation of its associated grate section; said drive means being operatively connected to the associated pivot pins.
  • a combustion grate as claimed in claim 1, in which each of said oscillation axes is disposed within said circular sector profile.
  • a combustion grate as claimed in claim 1, including a combustion chamber in which said grate is mounted, said combustion chamber having side walls; said stationary sealing means comprising circular housings each mounted on a combustion chamber side wall and each closely embracing a respective disk to form therewith said maze sealing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
US623742A 1966-03-16 1967-03-16 Multisection combustion grate with lateral sealing means Expired - Lifetime US3399662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH58814A DE1301420B (de) 1966-03-16 1966-03-16 Verbrennungsrost, insbesondere fuer Muellverbrennungsanlagen

Publications (1)

Publication Number Publication Date
US3399662A true US3399662A (en) 1968-09-03

Family

ID=7160292

Family Applications (1)

Application Number Title Priority Date Filing Date
US623742A Expired - Lifetime US3399662A (en) 1966-03-16 1967-03-16 Multisection combustion grate with lateral sealing means

Country Status (9)

Country Link
US (1) US3399662A (de)
AT (1) AT267724B (de)
BE (1) BE695561A (de)
CH (1) CH447452A (de)
DE (1) DE1301420B (de)
ES (1) ES338111A1 (de)
FR (1) FR1514579A (de)
GB (1) GB1131197A (de)
NL (1) NL6703967A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254715A (en) * 1978-11-15 1981-03-10 Hague International Solid fuel combustor and method of burning
US6332410B1 (en) * 1998-08-19 2001-12-25 Alstom Grate for incineration plants

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460618A (en) * 1922-04-05 1923-07-03 Caseyhedges Co Hand stoker
US1586963A (en) * 1925-03-06 1926-06-01 Lester E Budd Grate structure
US3057309A (en) * 1959-08-18 1962-10-09 Flynn & Emrich Company Constant flow stoker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456138A (en) * 1919-10-30 1923-05-22 Mackay Vasil Auxiliary feed block for furnaces
DE341245C (de) * 1920-03-25 1921-09-28 Josef Hannig Rost mit einer Einrichtung zum Brechen der Schlacken
DE1626088U (de) * 1948-10-01 1951-07-26 Heinrich Dipl Ing Truelsen Reinigungs- und schuervorrichtung fuer roste.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460618A (en) * 1922-04-05 1923-07-03 Caseyhedges Co Hand stoker
US1586963A (en) * 1925-03-06 1926-06-01 Lester E Budd Grate structure
US3057309A (en) * 1959-08-18 1962-10-09 Flynn & Emrich Company Constant flow stoker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254715A (en) * 1978-11-15 1981-03-10 Hague International Solid fuel combustor and method of burning
US6332410B1 (en) * 1998-08-19 2001-12-25 Alstom Grate for incineration plants

Also Published As

Publication number Publication date
DE1301420B (de) 1969-08-21
ES338111A1 (es) 1968-04-01
AT267724B (de) 1969-01-10
FR1514579A (fr) 1968-02-23
GB1131197A (en) 1968-10-23
BE695561A (de) 1967-09-01
NL6703967A (de) 1967-09-18
CH447452A (de) 1967-11-30

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