US20180031331A1 - Basket for heat transfer elements for a rotary air preheater - Google Patents
Basket for heat transfer elements for a rotary air preheater Download PDFInfo
- Publication number
- US20180031331A1 US20180031331A1 US15/219,800 US201615219800A US2018031331A1 US 20180031331 A1 US20180031331 A1 US 20180031331A1 US 201615219800 A US201615219800 A US 201615219800A US 2018031331 A1 US2018031331 A1 US 2018031331A1
- Authority
- US
- United States
- Prior art keywords
- basket
- pieces
- corner pieces
- connector
- heat transfer
- 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.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
- F28D19/042—Rotors; Assemblies of heat absorbing masses
- F28D19/044—Rotors; Assemblies of heat absorbing masses shaped in sector form, e.g. with baskets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the present invention relates generally to a basket for receiving heat transfer elements for a rotary air preheater in which high temperature flue gases and air flow though, and more specifically to a light weight metallic basket that includes one or more heavy gauge side structural support and wear resistant walls that help contain air and gas flows laterally within the basket.
- Rotary air preheaters typically have a plurality of pie shaped sectors, each of which have several baskets containing heat transfer elements therein.
- the heat transfer elements are typically manufactured from corrugated metallic plates.
- Each basket contains a plurality of the heat transfer elements.
- the baskets are constructed to orient the heat transfer elements in a flow direction of flue gas and air through the air preheater. Since the heat transfer elements are of a substantive weight, the baskets have a structure sufficient to support the weight of the heat transfer elements.
- the overall weight of the baskets and the heat transfer elements are supported by a spindle mounted on bearings that enable rotation of the sectors. High weight baskets can cause the bearings to become overloaded. In addition, high weight baskets are expensive to manufacture.
- some prior art baskets do not keep air and gas flows laterally contained within the basket, but instead allow a portion of the air and gas flow to bypass the heat transfer elements in the basket and to flow through empty gaps between the basket of heat transfer elements and the rotor structure. Such lack of lateral containment and bypass flow reduces heat transfer and air preheater effectiveness.
- the present invention resides in a basket for receiving heat transfer elements for a rotary air preheater.
- the basket includes two metallic frames each having two elongate corner pieces and two elongate connector pieces. Each of the corner pieces has a two leg angled cross section and each of the connector pieces are substantially flat. For each frame, one of the connector pieces is secured to one end of each of the corner pieces and another of the connector pieces is secured to an opposite end of each of the corner pieces such that the corner pieces are spaced apart from and parallel to one another and the connector pieces are spaced apart from and parallel to one another thereby forming a rectangular opening in each frame.
- the basket includes two heavy gauge metallic sheets (e.g., 12 gauge).
- Each sheet has opposite edges secured longitudinally along one of the corner pieces, thereby spacing the frames equally apart from and parallel to one another, thereby forming a channel between the two sheets.
- the channel has a longitudinal axis that is parallel to and bounded by the corner pieces.
- the channel is configured to receive heat transfer elements having a flow direction coaxial with the channel.
- the basket includes a metallic closure grid secured, at each opposing end of the channel, to two of the connector pieces and two of the sheets.
- the closure grid has a plurality of openings therein. The openings are configured to convey a flow of a fluid therethrough.
- the closure grid is configured to secure the heat transfer elements in the channel between the two closure grids.
- the present invention resides in a method of retrofitting a basket for receiving heat transfer elements for a rotary air preheater.
- the method includes at least partially disassembling the basket, removing worn, inefficient or antiquated heat transfer elements from the basket, positioning new or refurbished heat transfer elements in the basket; and reassembling the basket.
- FIG. 1 is a perspective view of the basket of the present invention
- FIG. 2 is a front view of the basket of FIG. 1 ;
- FIG. 3 is an enlarged view of a corner of the basket of FIG. 1 ;
- FIG. 4 is an enlarged view of another corner of the basket of FIG. 1 ;
- FIG. 5 is an enlarged view of a portion of the basket of FIG. 1 shown with a stack of heat transfer elements disposed therein;
- FIG. 6 is a top schematic view of a portion of a rotary air preheater with basket shown in portions of three sectors.
- a basket for receiving a stack 80 of heat transfer elements 88 (see FIG. 5 for the stack 80 of heat transfer elements 88 ) for a rotary air preheater is generally designated by the numeral 10 .
- the basket 10 is configured for receiving the stack 80 of heat transfer elements 88 for the rotary air preheater and withstanding high temperature (e.g., 130° C. or greater) flue gas and air flow.
- the basket 10 includes two metallic frames 20 and 20 ′ each having two elongate corner pieces 22 A, 22 B and 22 A′, 22 B′ and two elongate connector pieces 24 A, 24 B and 24 A′, 24 B′ ( 24 B′ shown partially in dashed lines and through a cutaway portion of sheet 30 ′).
- the corner pieces 22 A, 22 B and 22 A′, 22 B′ and connector pieces 24 A, 24 B and 24 A′, 24 B′ are all manufactured from a metallic material such as, but not limited to, a carbon steel alloy.
- the corner pieces 22 A, 22 B and 22 A′, 22 B′ and connector pieces 24 A, 24 B and 24 A′, 24 B′ are positioned at a perimeter of the frame 20 , 20 ′.
- the corner piece 22 B has a two leg angled cross section.
- the corner piece 22 B is defined by two elongate sections 23 , 25 that extend an entire length of the corner piece 22 B.
- Each of the elongate sections 23 , 25 extend laterally outward from a bend 27 at an angle ⁇ from one another.
- the angle ⁇ is obtuse (i.e., 180° ⁇ 90°) for two of the corner pieces 22 A′ and 22 B′ and the angle ⁇ is acute (i.e., 0>90°) for two of the corner pieces 22 A and 22 B.
- the corner piece 22 A is configured the same as the corner piece 22 B.
- the corner pieces 22 A′ and 22 B′ are configured the same as the corner pieces 22 A and 22 B with the exception of that the angle ⁇ is obtuse.
- the connector piece 24 A is shown in a preferred embodiment as being substantially flat.
- the connector pieces 24 B, 24 A′ and 24 B′ are also shown as being substantially flat.
- the present invention is not limited in this regard, as other configurations and cross sections may be employed, including, but not limited to, angled cross sections and arcuate cross sections.
- the connector pieces 24 A and 24 B of the frame 20 are longer than the connector pieces 24 A′ and 24 B′ of the other frame 20 ′.
- the connector piece 24 A is secured (e.g., by welding) to one end of each of the corner pieces 22 A and 22 B and the connector piece 24 B is secured (e.g., by welding) to an opposite end of each of the corner pieces 22 A and 22 B, such that the corner pieces 22 A and 22 B are spaced apart from and parallel to one another and the connector pieces 24 A and 24 B are spaced apart from and parallel to one another, thereby forming a rectangular opening 29 in the frame 20 .
- the connector piece 24 A′ is secured (e.g., by welding) to one end of each of the corner pieces 22 A′ and 22 B′ and the connector piece 24 B′ is secured (e.g., by welding) to an opposite end of each of the corner pieces 22 A′ and 22 B′ such that the corner pieces 22 A′ and 22 B′ are spaced apart from and parallel to one another and the connector pieces 24 A′ and 24 B′ are spaced apart from and parallel to one another, thereby forming a rectangular opening 29 ′ in the frame 20 ′.
- outside surfaces of the connector pieces 24 A, 24 B and 24 A′, 24 B′ of each frame 20 , 20 ′ are coplanar with outside surfaces of the elongate sections 23 of the corner pieces 22 A, 22 B and 22 A′, 22 B′ of the respective frame 20 , 20 ′.
- the basket 10 includes two heavy gauge metallic sheets 30 and 30 ′ that are wear resistant (e.g., resistant to wear and/or cracking resulting from soot blowing) and are structural support members of the basket 10 .
- each of the sheets is 12 gauge.
- the sheets are 11 gauge.
- the sheets are 12 to 10 gauge.
- the sheets 30 and 30 ′ are manufactured from a metallic material such as, but not limited to, a carbon steel alloy.
- the sheet 30 has opposite edges 30 A and 30 B secured longitudinally along (e.g., along an outside surface of the elongate section 25 ) one of the corner pieces 22 A and 22 A′, respectively.
- the edge 30 B that is located on an inboard side K 1 (i.e., a side of the basket configured to face a rotor post 19 as shown in FIG. 6 of an air preheater) of the basket 10 is secured to the corner piece 22 A′ by a weld WW 1 on an inside portion of the edge 30 B; and the edge 30 A that is located on an outboard side K 2 (i.e., a side of the basket configured to face away from the rotor post 19 as shown in FIG. 6 of an air preheater) of the basket 10 is secured to the corner piece 22 A by a weld WW 2 on an outside portion of the edge 30 A.
- the sheet 30 ′ has opposite edges 30 A′ and 30 B′ secured longitudinally along (e.g., along an outside surface of the elongate section 25 ) one of the corner pieces 22 B and 22 B′, respectively.
- the edge 30 B′ that is located on the inboard side K 1 of the basket 10 is secured to the corner piece 22 B′ by a weld WW 3 on an inside portion of the edge 30 B′; and the edge 30 A′ that is located on the outboard side K 2 of the basket 10 is secured to the corner piece 22 B by a weld WW 4 on an outside portion of the edge 30 A′.
- the sheets 30 and 30 ′ space the frames 20 and 20 ′ equally apart from and parallel to one another thereby forming a channel 40 between two of the sheets 30 and 30 ′.
- the channel 40 has a longitudinal axis L 1 that is parallel to and bounded by the corner pieces 22 A, 22 B and 22 A′, 22 B′.
- the channel 40 is configured to receive heat transfer sheets (as shown in FIG. 5 ) having a flow direction coaxial with the channel 40 .
- the channel 40 has a trapezoidal cross section.
- welds WW 1 , WW 2 , WW 3 and WW 4 are shown and described, the present invention is not limited in this regard as other locations of welds and/or fasteners may be employed without departing from the broader aspects of the present invention.
- a plurality of baskets 10 are shown positioned in adjacent sectors 18 A, 18 B and 18 C portions of which are mounted in a cut away portion of an air preheater, radially outward of a rotor post 19 .
- the sheets 30 and 30 ′ are a barrier for preventing lateral bypass of gas and air flow between sides of the baskets 10 at edges of the heat transfer elements 88 (see FIG. 5 ) in the direction of the arrows H and into a gap M between the adjacent sectors 18 A, 18 B and 18 C.
- the sheets 30 and 30 ′ laterally contain the gas and air flow within the basket 10 , thereby improving heat transfer and improving the effectiveness of the air preheater having the stack 80 of heat transfer elements 88 in the basket 10 installed in the air preheater as compared to heat transfer elements in baskets with open lateral sides.
- the basket 10 includes a closure grid 50 and 50 ′ positioned at each opposing end of the channel 40 .
- the closure grid 50 is shown having three closure strips 52 A, 52 B and 52 C. Each of the three closure strips 52 A, 52 B and 52 C have one end thereof secured to an inside facing surface of the connector piece 24 A and an opposing end thereof secured to an inside facing surface of the connector piece 24 A′, for example by welding.
- the closure grid 50 includes one cross piece 54 extending through and secured to the closure strips 52 A, 52 B and 52 C, for example by welding. One end of the cross piece 54 is secured to the sheet 30 and an opposite end of the cross piece 54 is secured to the sheet 30 ′, for example by welding.
- the closure grid 50 has a plurality of openings 55 therein. The openings 55 are configured to convey a flow of a fluid therethrough and into the channel 40 .
- Each of the three closure strips 52 A′, 52 B′ and 52 C′ have one end thereof secured to an inside facing surface of the connector piece 24 B and an opposing end thereof secured to an inside facing surface of the connector piece 24 B′, for example by welding.
- the closure grid 50 ′ includes one cross piece 54 ′ extending through and secured to the closure strips 52 A′, 52 B′ and 52 C′, for example by welding.
- One end of the cross piece 54 ′ is secured to the sheet 30 and an opposite end of the cross piece 54 ′ is secured to the sheet 30 ′, for example by welding.
- the closure grid 50 ′ has a plurality of openings 55 ′ therein.
- the openings 55 ′ are configured to convey a flow of a fluid therethrough and into the channel 40 .
- the closure grids 50 and 50 ′ are configured to secure the stack 80 of heat transfer elements 88 in the channel 40 between the two closure grids 50 and 50 ′.
- the closure grids 50 and 50 ′ also provide lateral support between and prevent bowing of the sheets 30 and 30 ′.
- the closure grids 50 and 50 ′ further provide lateral support between and prevent bowing of the respective pairs of connector pieces 24 A, 24 A′ and 24 B, 24 B′.
- closure grids 50 and 50 ′ are shown having three closure strips 52 A′, 52 B′ and 52 C′ and one cross piece 54 ′, the present invention is not limited in this regard as more or less than three closure strips and/or more than one cross piece may be employed, depending upon the size of the basket 10 .
- corner pieces 22 A, 22 B and 22 A′, 22 B′ and connector pieces 24 A, 24 B and 24 A′, 24 B′ each have a width W 1 that is less than 5 percent of an overall width W or W′ of the frame 20 , 20 ′.
- the heat transfer elements 88 are, for example, corrugated sheets that have a plurality of undulations and sheet spacing features.
- the heat transfer elements 88 are positioned in a staggered configuration on top of one another in the basket 10 such that individual flow channels 90 are formed between adjacent heat transfer elements 88 .
- the individual flow channels 90 are aligned in the same direction as the channel 40 .
- the heat transfer elements 88 are placed into the basket 10 from side having the opening 29 before the corner pieces 22 A and 22 B are secured to the sheets 30 and 30 ′ and the connector pieces 24 A and 24 B, but with the remainder of the basket 10 assembled.
- the heat transfer elements 88 are stacked upon one another in the staggered configuration and pressed against each other.
- the corner pieces 22 A and 22 B are secured to the sheets 30 and 30 ′ and the connector pieces 24 A and 24 B, for example by welding, to secure the heat transfer elements 88 pressed against one another in the basket 10 between the frame 20 and the frame 20 ′.
Abstract
A basket for an air preheater includes two metallic frames each having two corner pieces and two connector pieces. For each frame, one of the connector pieces is secured to one end of each of the corner pieces and another of the connector pieces is secured to an opposite end of each of the corner pieces thereby forming a rectangular opening in each frame. The basket includes two heavy gauge metallic sheets that are secured to the corner pieces, thereby spacing the frames equally apart from and parallel to one another thereby forming a channel between two of the sheets.
Description
- The present invention relates generally to a basket for receiving heat transfer elements for a rotary air preheater in which high temperature flue gases and air flow though, and more specifically to a light weight metallic basket that includes one or more heavy gauge side structural support and wear resistant walls that help contain air and gas flows laterally within the basket.
- Rotary air preheaters typically have a plurality of pie shaped sectors, each of which have several baskets containing heat transfer elements therein. The heat transfer elements are typically manufactured from corrugated metallic plates. Each basket contains a plurality of the heat transfer elements. The baskets are constructed to orient the heat transfer elements in a flow direction of flue gas and air through the air preheater. Since the heat transfer elements are of a substantive weight, the baskets have a structure sufficient to support the weight of the heat transfer elements. The overall weight of the baskets and the heat transfer elements are supported by a spindle mounted on bearings that enable rotation of the sectors. High weight baskets can cause the bearings to become overloaded. In addition, high weight baskets are expensive to manufacture.
- It is known that the heat transfer elements can become fouled with ash deposits thereby reducing the effectiveness of the air preheater. Soot blowing arrangements have been employed to clean the ash deposits off of the heat transfer elements. However, the soot blowing operations can erode or crack portions of the basket.
- In addition, some prior art baskets do not keep air and gas flows laterally contained within the basket, but instead allow a portion of the air and gas flow to bypass the heat transfer elements in the basket and to flow through empty gaps between the basket of heat transfer elements and the rotor structure. Such lack of lateral containment and bypass flow reduces heat transfer and air preheater effectiveness.
- Thus, there is a need for an improved lighter weight basket for heat transfer elements that is resistant to erosion and other effects of soot blowing and that has improved heat transfer and that results in an improved heat transfer effectiveness of the air preheater.
- In one aspect, the present invention resides in a basket for receiving heat transfer elements for a rotary air preheater. The basket includes two metallic frames each having two elongate corner pieces and two elongate connector pieces. Each of the corner pieces has a two leg angled cross section and each of the connector pieces are substantially flat. For each frame, one of the connector pieces is secured to one end of each of the corner pieces and another of the connector pieces is secured to an opposite end of each of the corner pieces such that the corner pieces are spaced apart from and parallel to one another and the connector pieces are spaced apart from and parallel to one another thereby forming a rectangular opening in each frame. The basket includes two heavy gauge metallic sheets (e.g., 12 gauge). Each sheet has opposite edges secured longitudinally along one of the corner pieces, thereby spacing the frames equally apart from and parallel to one another, thereby forming a channel between the two sheets. The channel has a longitudinal axis that is parallel to and bounded by the corner pieces. The channel is configured to receive heat transfer elements having a flow direction coaxial with the channel.
- In one embodiment, the basket includes a metallic closure grid secured, at each opposing end of the channel, to two of the connector pieces and two of the sheets. The closure grid has a plurality of openings therein. The openings are configured to convey a flow of a fluid therethrough. The closure grid is configured to secure the heat transfer elements in the channel between the two closure grids.
- In another aspect, the present invention resides in a method of retrofitting a basket for receiving heat transfer elements for a rotary air preheater. The method includes at least partially disassembling the basket, removing worn, inefficient or antiquated heat transfer elements from the basket, positioning new or refurbished heat transfer elements in the basket; and reassembling the basket.
-
FIG. 1 is a perspective view of the basket of the present invention; -
FIG. 2 is a front view of the basket ofFIG. 1 ; -
FIG. 3 is an enlarged view of a corner of the basket ofFIG. 1 ; -
FIG. 4 is an enlarged view of another corner of the basket ofFIG. 1 ; -
FIG. 5 is an enlarged view of a portion of the basket ofFIG. 1 shown with a stack of heat transfer elements disposed therein; and -
FIG. 6 is a top schematic view of a portion of a rotary air preheater with basket shown in portions of three sectors. - Referring to
FIGS. 1 and 2 , a basket for receiving astack 80 of heat transfer elements 88 (seeFIG. 5 for thestack 80 of heat transfer elements 88) for a rotary air preheater is generally designated by thenumeral 10. Thebasket 10 is configured for receiving thestack 80 ofheat transfer elements 88 for the rotary air preheater and withstanding high temperature (e.g., 130° C. or greater) flue gas and air flow. Thebasket 10 includes twometallic frames elongate corner pieces elongate connector pieces sheet 30′). Thecorner pieces connector pieces corner pieces connector pieces frame - As best shown in
FIG. 3 , thecorner piece 22B has a two leg angled cross section. Thecorner piece 22B is defined by twoelongate sections corner piece 22B. Each of theelongate sections bend 27 at an angle θ from one another. The angle θ is obtuse (i.e., 180°<θ<90°) for two of thecorner pieces 22A′ and 22B′ and the angle θ is acute (i.e., 0>90°) for two of thecorner pieces corner piece 22A is configured the same as thecorner piece 22B. Thecorner pieces 22A′ and 22B′ are configured the same as thecorner pieces - As best shown in
FIG. 3 , theconnector piece 24A is shown in a preferred embodiment as being substantially flat. Theconnector pieces connector pieces frame 20 are longer than theconnector pieces 24A′ and 24B′ of theother frame 20′. - As shown in
FIG. 1 , for theframe 20, theconnector piece 24A is secured (e.g., by welding) to one end of each of thecorner pieces connector piece 24B is secured (e.g., by welding) to an opposite end of each of thecorner pieces corner pieces connector pieces rectangular opening 29 in theframe 20. For theframe 20′, theconnector piece 24A′ is secured (e.g., by welding) to one end of each of thecorner pieces 22A′ and 22B′ and theconnector piece 24B′ is secured (e.g., by welding) to an opposite end of each of thecorner pieces 22A′ and 22B′ such that thecorner pieces 22A′ and 22B′ are spaced apart from and parallel to one another and theconnector pieces 24A′ and 24B′ are spaced apart from and parallel to one another, thereby forming arectangular opening 29′ in theframe 20′. - As shown in
FIGS. 2 and 3 , outside surfaces of theconnector pieces frame elongate sections 23 of thecorner pieces respective frame - As shown in
FIGS. 1 and 2 , thebasket 10 includes two heavy gaugemetallic sheets basket 10. For example, each of the sheets is 12 gauge. In one embodiment, the sheets are 11 gauge. In another embodiment the sheets are 12 to 10 gauge. Thesheets sheet 30 hasopposite edges corner pieces sheet 30, theedge 30B that is located on an inboard side K1 (i.e., a side of the basket configured to face arotor post 19 as shown inFIG. 6 of an air preheater) of thebasket 10 is secured to thecorner piece 22A′ by a weld WW1 on an inside portion of theedge 30B; and theedge 30A that is located on an outboard side K2 (i.e., a side of the basket configured to face away from therotor post 19 as shown inFIG. 6 of an air preheater) of thebasket 10 is secured to thecorner piece 22A by a weld WW2 on an outside portion of theedge 30A. Thesheet 30′ hasopposite edges 30A′ and 30B′ secured longitudinally along (e.g., along an outside surface of the elongate section 25) one of thecorner pieces sheet 30′, theedge 30B′ that is located on the inboard side K1 of thebasket 10 is secured to thecorner piece 22B′ by a weld WW3 on an inside portion of theedge 30B′; and theedge 30A′ that is located on the outboard side K2 of thebasket 10 is secured to thecorner piece 22B by a weld WW4 on an outside portion of theedge 30A′. Thesheets frames channel 40 between two of thesheets channel 40 has a longitudinal axis L1 that is parallel to and bounded by thecorner pieces channel 40 is configured to receive heat transfer sheets (as shown inFIG. 5 ) having a flow direction coaxial with thechannel 40. In one embodiment, thechannel 40 has a trapezoidal cross section. - While the welds WW1, WW2, WW3 and WW4 are shown and described, the present invention is not limited in this regard as other locations of welds and/or fasteners may be employed without departing from the broader aspects of the present invention.
- As shown in
FIG. 6 , a plurality ofbaskets 10 are shown positioned inadjacent sectors rotor post 19. Thesheets baskets 10 at edges of the heat transfer elements 88 (seeFIG. 5 ) in the direction of the arrows H and into a gap M between theadjacent sectors sheets basket 10, thereby improving heat transfer and improving the effectiveness of the air preheater having thestack 80 ofheat transfer elements 88 in thebasket 10 installed in the air preheater as compared to heat transfer elements in baskets with open lateral sides. - As shown in
FIGS. 1 and 2 , thebasket 10 includes aclosure grid channel 40. Theclosure grid 50 is shown having threeclosure strips closure strips connector piece 24A and an opposing end thereof secured to an inside facing surface of theconnector piece 24A′, for example by welding. Theclosure grid 50 includes onecross piece 54 extending through and secured to the closure strips 52A, 52B and 52C, for example by welding. One end of thecross piece 54 is secured to thesheet 30 and an opposite end of thecross piece 54 is secured to thesheet 30′, for example by welding. Theclosure grid 50 has a plurality ofopenings 55 therein. Theopenings 55 are configured to convey a flow of a fluid therethrough and into thechannel 40. - Each of the three
closure strips 52A′, 52B′ and 52C′ have one end thereof secured to an inside facing surface of theconnector piece 24B and an opposing end thereof secured to an inside facing surface of theconnector piece 24B′, for example by welding. Theclosure grid 50′ includes onecross piece 54′ extending through and secured to the closure strips 52A′, 52B′ and 52C′, for example by welding. One end of thecross piece 54′ is secured to thesheet 30 and an opposite end of thecross piece 54′ is secured to thesheet 30′, for example by welding. Theclosure grid 50′ has a plurality ofopenings 55′ therein. Theopenings 55′ are configured to convey a flow of a fluid therethrough and into thechannel 40. Theclosure grids stack 80 ofheat transfer elements 88 in thechannel 40 between the twoclosure grids closure grids sheets closure grids connector pieces - While the
closure grids closure strips 52A′, 52B′ and 52C′ and onecross piece 54′, the present invention is not limited in this regard as more or less than three closure strips and/or more than one cross piece may be employed, depending upon the size of thebasket 10. - In one embodiment,
corner pieces connector pieces frame - Referring to
FIGS. 1 and 5 , theheat transfer elements 88 are, for example, corrugated sheets that have a plurality of undulations and sheet spacing features. Theheat transfer elements 88 are positioned in a staggered configuration on top of one another in thebasket 10 such thatindividual flow channels 90 are formed between adjacentheat transfer elements 88. Theindividual flow channels 90 are aligned in the same direction as thechannel 40. During assembly, theheat transfer elements 88 are placed into thebasket 10 from side having theopening 29 before thecorner pieces sheets connector pieces basket 10 assembled. Theheat transfer elements 88 are stacked upon one another in the staggered configuration and pressed against each other. When thebasket 10 is filled with a predetermined number ofheat transfer elements 88 thecorner pieces sheets connector pieces heat transfer elements 88 pressed against one another in thebasket 10 between theframe 20 and theframe 20′. - While the present disclosure has been described with reference to various exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (14)
1. A basket for receiving heat transfer elements for a rotary air preheater, the basket comprising:
two metallic frames each having two elongate corner pieces and two elongate connector pieces, each of the corner pieces having a two leg angled cross section, for each frame one of the connector pieces is secured to one end of each of the corner pieces and another of the connector pieces is secured to an opposite end of each of the corner pieces such that the corner pieces are spaced apart from and parallel to one another and the connector pieces are spaced apart from and parallel to one another thereby forming a rectangular opening in each frame; and
two heavy gauge metallic sheets, each sheet having opposite edges secured longitudinally along one of the corner pieces, thereby spacing the frames equally apart from and parallel to one another thereby forming a channel between two of the sheets, the channel having a longitudinal axis that is parallel to and bounded by the corner pieces, the channel being configured to receive heat transfer elements having a flow direction coaxial with the channel.
2. The basket of claim 1 , wherein the heavy gauge sheets are 12 gauge.
3. The basket of claim 1 , further comprising:
a metallic closure grid secured, at each opposing end of the channel, to two of the connector pieces and two of the sheets, the closure grid having a plurality of openings therein, the openings being configured to convey a flow of a fluid therethrough.
4. The basket of claim 1 , wherein each of the connector pieces is substantially flat.
5. The basket of claim 1 , wherein, the corner pieces each having two elongate sections, each elongate section extending outwardly from a bend at an angle from one another and wherein the angle is obtuse for two of the corner pieces and the angle is acute for two of the corner pieces.
6. The basket of claim 1 , wherein at least one of the securing:
of opposite edges of each sheet longitudinally along of each of two of the corner pieces,
of one of the connector pieces to one end of each of the corner pieces and the securing of another of the connector pieces to an opposite end of each of the corner pieces, and
of the opposite edges of the sheets longitudinally along one of the corner pieces;
is by welding.
7. The basket of claim 4 , wherein the opposite edges each of the sheets is secured to an outside surface of the each of the respective elongate section of each of two of the corner pieces.
8. The basket of claim 1 , wherein outside surfaces of the connector pieces of each frame are coplanar with outside surfaces of one of the elongate sections of the corner pieces of the respective frame.
9. The basket of claim 1 , wherein two of the connector pieces of one of the frames are longer than two of the connector pieces of the other frame.
10. The basket of claim 2 , wherein the closure grid comprises:
at least one closure strip secured to opposing ones of the connector pieces; and
at least one cross piece extending through and secured to the at least one closure strips and opposing ends of the at least one cross piece being secured to opposing ones of the sheets.
11. The basket of claim 1 , wherein the connector pieces and the corner pieces each have a width that is less than 5 percent of an overall width of the frame.
12. The basket of claim 1 , wherein the connector pieces and the corner pieces are positioned at a perimeter of the frame.
13. The basket of claim 1 , further comprising a plurality of heat transfer elements stacked upon one another and disposed therein.
14. The basket of claim 13 , wherein said heavy gauge metallic sheets form a barrier to prevent gas and air flow bypass around edges of the heat transfer elements in contact therewith to improve effectiveness of the plurality of heat transfer elements in the basket installed in the air preheater as compared to heat transfer elements in baskets with open lateral sides.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/219,800 US20180031331A1 (en) | 2016-07-26 | 2016-07-26 | Basket for heat transfer elements for a rotary air preheater |
ES17749771T ES2795724T3 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
PL17749771T PL3491319T3 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
KR1020197004968A KR102427800B1 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
AU2017302506A AU2017302506B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
PCT/US2017/043457 WO2018022484A1 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
EP17749771.6A EP3491319B1 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
JP2019503717A JP6915216B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements of rotary air preheater |
US16/319,952 US11073341B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
CN201780050706.0A CN110036254B (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer element of rotary air preheater |
SA519400957A SA519400957B1 (en) | 2016-07-26 | 2019-01-24 | Basket for heat transfer elements for a rotary air preheater |
ZA2019/01018A ZA201901018B (en) | 2016-07-26 | 2019-02-18 | Basket for heat transfer elements for a rotary air preheater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/219,800 US20180031331A1 (en) | 2016-07-26 | 2016-07-26 | Basket for heat transfer elements for a rotary air preheater |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/319,952 Continuation US11073341B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
Publications (1)
Publication Number | Publication Date |
---|---|
US20180031331A1 true US20180031331A1 (en) | 2018-02-01 |
Family
ID=59569367
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/219,800 Abandoned US20180031331A1 (en) | 2016-07-26 | 2016-07-26 | Basket for heat transfer elements for a rotary air preheater |
US16/319,952 Active US11073341B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/319,952 Active US11073341B2 (en) | 2016-07-26 | 2017-07-24 | Basket for heat transfer elements for a rotary air preheater |
Country Status (11)
Country | Link |
---|---|
US (2) | US20180031331A1 (en) |
EP (1) | EP3491319B1 (en) |
JP (1) | JP6915216B2 (en) |
KR (1) | KR102427800B1 (en) |
CN (1) | CN110036254B (en) |
AU (1) | AU2017302506B2 (en) |
ES (1) | ES2795724T3 (en) |
PL (1) | PL3491319T3 (en) |
SA (1) | SA519400957B1 (en) |
WO (1) | WO2018022484A1 (en) |
ZA (1) | ZA201901018B (en) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4838342A (en) * | 1988-06-01 | 1989-06-13 | The Air Preheater Company, Inc. | Element basket assembly for heat exchanger |
CN2041803U (en) * | 1988-09-27 | 1989-07-26 | 张国祥 | Cast iron air preheater |
US5336471A (en) * | 1993-05-19 | 1994-08-09 | Abb Air Preheater, Inc. | Support of ceramic catalyst |
DE4338195A1 (en) * | 1993-11-09 | 1995-05-11 | Hoechst Ag | Process for the production of highly chlorinated paraffins |
US5664620A (en) * | 1996-07-18 | 1997-09-09 | Abb Air Preheater Inc. | Rotary regenerative heat exchanger |
US5664621A (en) | 1996-08-27 | 1997-09-09 | Abb Air Preheater, Inc. | Pre-stressed membrane basket cover assembly |
US5740856A (en) * | 1997-04-28 | 1998-04-21 | Abb Air Preheater Inc. | Rotary regenerative heat exchanger with multiple layer baskets |
US5893406A (en) * | 1997-11-13 | 1999-04-13 | Abb Air Preheater, Inc. | Regenerative heat exchanger |
US5911271A (en) * | 1998-08-27 | 1999-06-15 | Abb Air Preheater, Inc. | Floating bypass seal for rotary regenerative heat exchangers |
US5913359A (en) * | 1998-10-26 | 1999-06-22 | Abb Air Preheater, Inc. | Bypass seals for rotary regenerative heat exchangers |
JP4413334B2 (en) * | 1999-10-20 | 2010-02-10 | アルストム株式会社 | Regenerative carbon dioxide separator and carbon dioxide separation system |
US20030178173A1 (en) | 2002-03-22 | 2003-09-25 | Alstom (Switzerland) Ltd. | Heat transfer surface for air preheater |
US7556085B2 (en) * | 2007-04-03 | 2009-07-07 | Alstom Technology Ltd | Reversible heat transfer element basket assembly with integrated frame for use in a heat exchanger |
US8327809B2 (en) * | 2007-07-10 | 2012-12-11 | Babcock & Wilcox Power Generation Group, Inc. | Tri-sector regenerative oxidant preheater for oxy-fired pulverized coal combustion |
JP2015140987A (en) * | 2014-01-29 | 2015-08-03 | 次世代宇宙システム技術研究組合 | Thermal storage device, structure and process of manufacture of thermal storage device |
-
2016
- 2016-07-26 US US15/219,800 patent/US20180031331A1/en not_active Abandoned
-
2017
- 2017-07-24 ES ES17749771T patent/ES2795724T3/en active Active
- 2017-07-24 WO PCT/US2017/043457 patent/WO2018022484A1/en active Search and Examination
- 2017-07-24 PL PL17749771T patent/PL3491319T3/en unknown
- 2017-07-24 CN CN201780050706.0A patent/CN110036254B/en active Active
- 2017-07-24 AU AU2017302506A patent/AU2017302506B2/en active Active
- 2017-07-24 KR KR1020197004968A patent/KR102427800B1/en active IP Right Grant
- 2017-07-24 US US16/319,952 patent/US11073341B2/en active Active
- 2017-07-24 EP EP17749771.6A patent/EP3491319B1/en active Active
- 2017-07-24 JP JP2019503717A patent/JP6915216B2/en active Active
-
2019
- 2019-01-24 SA SA519400957A patent/SA519400957B1/en unknown
- 2019-02-18 ZA ZA2019/01018A patent/ZA201901018B/en unknown
Also Published As
Publication number | Publication date |
---|---|
SA519400957B1 (en) | 2021-10-06 |
CN110036254B (en) | 2021-01-22 |
US11073341B2 (en) | 2021-07-27 |
EP3491319B1 (en) | 2020-04-15 |
WO2018022484A1 (en) | 2018-02-01 |
AU2017302506A1 (en) | 2019-03-14 |
JP6915216B2 (en) | 2021-08-04 |
ZA201901018B (en) | 2019-12-18 |
CN110036254A (en) | 2019-07-19 |
US20190242656A1 (en) | 2019-08-08 |
ES2795724T3 (en) | 2020-11-24 |
JP2019522169A (en) | 2019-08-08 |
PL3491319T3 (en) | 2020-11-16 |
KR20190032464A (en) | 2019-03-27 |
KR102427800B1 (en) | 2022-08-01 |
AU2017302506B2 (en) | 2022-04-07 |
EP3491319A1 (en) | 2019-06-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10982908B2 (en) | Heat transfer sheet for rotary regenerative heat exchanger | |
US11092387B2 (en) | Heat transfer assembly for rotary regenerative preheater | |
US8622115B2 (en) | Heat transfer element for a rotary regenerative heat exchanger | |
US11073341B2 (en) | Basket for heat transfer elements for a rotary air preheater | |
EP3709310B1 (en) | A filter and a fuel assembly for a nuclear plant | |
US6640880B1 (en) | Heat exchanger recessed basket lifting cover | |
JP5959606B2 (en) | Rotating regenerative heat exchanger | |
SE501542C2 (en) | Fire damper frame |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ARVOS, INC., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:COWBURN, LAWRENCE GILBERT;DUFFNEY, SCOTT RICHARD;BICE, JAMES LESLIE;REEL/FRAME:040160/0681 Effective date: 20160727 |
|
AS | Assignment |
Owner name: ARVOS LJUNGSTROM LLC, NEW YORK Free format text: CHANGE OF NAME;ASSIGNOR:ARVOS INC.;REEL/FRAME:043989/0835 Effective date: 20170330 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |