US20050199163A1 - Stoker grates for circulating burning-up - Google Patents
Stoker grates for circulating burning-up Download PDFInfo
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- US20050199163A1 US20050199163A1 US11/097,115 US9711505A US2005199163A1 US 20050199163 A1 US20050199163 A1 US 20050199163A1 US 9711505 A US9711505 A US 9711505A US 2005199163 A1 US2005199163 A1 US 2005199163A1
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- United States
- Prior art keywords
- grate
- moveable
- stationary
- sheets
- grate sheet
- Prior art date
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- Abandoned
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- 230000005540 biological transmission Effects 0.000 claims description 21
- 239000003245 coal Substances 0.000 abstract description 23
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000010304 firing Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H11/00—Travelling-grates
- F23H11/12—Travelling-grates inclined travelling grates; Stepped travelling grates
Definitions
- the invention relates to a boiler stoker, specially, to the grate of horizontal circulating burning-up.
- the grates for stoker-fired boiler can be classified in structure into two kinds, i.e. the reciprocating grate and the chain grate.
- the fuel is fed continuously to one end of the grate surface and travels horizontally across the grate as it burns.
- the residual ash is discharged from the opposite end.
- the above mentioned stoker grates have the following defects: 1) the coal is ignited mainly by means of the heat radiation from the furnace arch, the ignition begins from the upper layer towards the lower layer of the coal bed in a direction which is opposite to the direction of air flow, resulting in an unfavorable burning state and cause incomplete combustion; 2) the resident time of coal burning on the grate can not be long as the grate has a limited length, so the coal can not be fully burn up; and 3) the bottom layer of the coal is ignited at last, resulting in the fine coal particles to leak out from the vent slits of the grate and cause a big loss of coal.
- An object of the present invention is to provide a boiler stoker for horizontal circulating burning-up, which overcome the following defects of the reciprocating and chain grates used for the existing coal-fired stokers: the resident time of coal burning on the grate is insufficient, the ignition of coal mainly by means of the heat radiation from the furnace, so the coal can not be fully burn up, and the fine coal particles in the bottom layer is easy to leak out from the vent slits of the grate and lead to a remarkable coal loss.
- the technical scheme is as follows: Let the both ends of the conventional stoker grate connect together and make an enclosed long annular moving grate. The coal is burn on the long annular grate with a pattern of horizontal circulating burning.
- the first aspect of the invention comprises a stationary grate sheets support, moveable grate sheets supports fitting with prop rolls on the stationary grate sheets support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheets support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheets supports and a driving unit, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, the mentioned stationary grate sheets support has a long annular shape, the mentioned moveable sheet supports comprise a pair of rectangular supports opposed to each other and another pair of annular-shaped moveable grate sheet supports opposed to each other so as to form a long annular-shaped assembled support, the mentioned driving unit is a set of bearing units which are mounted on the stationary grate sheet support, oscillating rods are connected between the bearings of said bearing units, and at least one of the rectangular moveable grate sheet supports and the arc-shaped moveable furnace grate sheet supports in said moveable grate sheet supports, the arc-shaped
- the second aspect of the invention comprises a stationary grate sheet support, moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, and moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, said stationary grate sheet support has a long annular shape, said moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other so as to form a long annular shape assembled support, said rectangular moveable grate sheet supports is hinged with the arc-shaped moveable grate sheet supports, and one of the said rectangular moveable grate sheet support or arc-shaped moveable grate sheet support is connected with a power input link.
- the third aspect of the invention comprises a stationary grate sheet support, moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, and a transmission unit, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, both the said stationary grate sheet support and moveable grate sheet supports have a long annular shape, the said transmission unit is a bearing unit which is located at the center of said moveable grate sheet supports and fixed to said stationary grate sheet support, an oscillating rod is connected between the bearing of said bearing unit and said moveable grate sheet supports, and said oscillating rod is connected with a power input link.
- the fourth aspect of the invention comprises a grate support, a chain and a transmission unit, wherein the chain comprises a driving grate sheet chain and a driven grate sheets, the said driving grate sheet chain has a horizontal annular shape structure, the driven grate sheets are inserted in two opposed directions alternatively and fixed with the pin shafts of the driving grate sheet chain, the sides of the adjacent driven furnace grate sheets are overlapped or connected with each other, and there are one or more ash discharge exits on the side wall of the grate support.
- the invention as compared with the existing art, has the following features: the grate has a long annular shape structure, the coal can be circulated and burned on the grate, the resident time of coal burning on the grate can be much longer, the bottom burning coal layer forms a sufficient ignition heat source, the new feeding coal covers on the circulating burning coal layer, the combustion begins from the lower layer towards upper layer and keeps the same direction as that of the air flow, so as to form a complete combustion state.
- the invention has the following benefit effects: 1) the coal can be totally burning up and combustion efficiency can be remarkably improved, (increased by more than 11% as compared to the conventional coal-firing stoker); 2) the blackness and the dust emission in the flue gas can be much lower; 3) combustion can be performed at low temperature (900° C.), desulphurization and the lower concentration of harmful NOx in the flue gas are achieved, and the effect can be corresponding to that of the circulating fluidized-bed furnace; 4) the coal of low heating value (as low as 12.56 MJ/kg) can be burnt; and 5) the comprehensive operation cost is only a half of that of a circulating fluidized-bed furnace.
- FIG. 1 is a schematic plan view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is two sets of bearing units;
- FIG. 2 is an enlarged structure schematic view of a stoker grate for circulating burning-up taken along A-A in FIG. 1 .
- said moveable grate sheet supports are long annular shape assembled supports and said transmission unit is two sets of bearing units;
- FIG. 3 is a structure schematic view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is one set of bearing unit located at the center of the stationary grate sheet support;
- FIG. 4 is a structure schematic plan view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is one set of bearing unit located on outside of the stationary grate sheet support;
- FIG. 5 is a structural top view of a stoker grate for circulating burning-up in the case that there is no said bearing unit;
- FIG. 6 is a structure schematic view of a stoker grate for circulating burning-up in the case that both stationary grate sheet support and moveable grate sheet supports have a annular shape;
- FIG. 7 is a schematic view of a stoker grate for circulating burning-up in the case that it is consisted of a chain structure.
- the grate comprises a stationary grate sheet support 1 , moveable grate sheet supports fitting with prop rolls 2 on the stationary grate sheet support 1 , the stationary grate sheets 4 fitting with mounting transverse beams 3 of the stationary grate sheet support 1 , moveable grate sheets 6 fitting with mounting transverse beams 5 of the moveable grate sheet support, and a transmission unit, wherein the moveable grate sheets 6 and the stationary grate sheets 4 are disposed alternatively, the stationary grate sheet support 1 has a long annular shape, the moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports 7 opposed to each other and another pair of semi-annular moveable grate sheet supports 8 opposed to each other to form a long annular shape assembled support, the transmission unit is two sets of bearing units 9 and 10 , which are fixed to the stationary grate sheet support 1
- One of the oscillating rods 11 is connected with a power input link 12 .
- ash falling slits 13 of 15-20 mm, under which there is a ash discharge opening 14 .
- a transmission unit is a set of bearing unit 9 which is located at the center of said stationary grate sheet support 1 , an oscillating rod 11 is connected between the bearing of the bearing unit 9 and the middle portion of the rectangular moveable grate sheet supports 7 , roller seats each with a limit roller 15 are bolt-fixed onto the inner walls on two sides of the moveable grate sheets 6 on the semi-annular moveable grate sheet supports 8 corresponding stationary grate sheet support 1 , and hinges 16 are connected between the rectangular moveable grate sheet supports 7 and the semi-annular moveable grate sheet supports 8 .
- a transmission unit is a set of bearing unit 9 which is located the outside of the stationary grate sheet support 1 , an oscillating rod 11 is connected between the bearing of the bearing unit 9 and one of the semi-annular moveable grate sheet supports 8 in the moveable grate sheet supports, and roller seats each with a limit roller 15 are bolt-fixed onto the inner walls on two sides of the moveable grate sheets 6 on the semi-annular moveable grate sheet supports 8 of stationary grate sheet support 1 .
- bearing unit shown as in FIG.
- one of said rectangular moveable grate sheet supports 7 or semi-annular shape moveable grate sheet supports 8 is connected with a power input link 12 , and limit rollers 23 are fixed onto the inner walls on outside plate at the semi-annular moveable grate sheet supports 8 of stationary grate sheet support 1 .
- limit rollers 23 are fixed onto the inner walls on outside plate at the semi-annular moveable grate sheet supports 8 of stationary grate sheet support 1 .
- a grate comprises a stationary grate sheet support 1 , a moveable grate sheet support fitting with prop rolls 2 on the stationary grate sheet support 1 , stationary grate sheets 4 fitting with mounting transverse beams of the stationary grate sheet support 1 , moveable grate sheets 6 fitting with mounting transverse beams of the moveable grate sheet support, and a transmission unit, wherein the moveable grate sheets 6 and the stationary grate sheets 4 are disposed alternatively, both the stationary grate sheet support 1 and the moveable grate sheet support are annular in shape, the transmission unit is a bearing unit 9 which is fixed to the stationary grate sheet support 1 , and which are located at the center of the annular of the moveable grate sheet support, respectively, oscillating rods 11 are connected between the bearing of the bearing unit 9 and the moveable grate sheet support, one of the oscillating rods 11 is connected with a power input link 12 .
- a grate comprises a grate support 17 , a chain and a transmission unit, wherein the chain comprises a driving grate sheet chain 18 and a driven grate sheets 19 , the driving grate sheet chain 18 has a horizontal long annular shape structure, the driven grate sheets 19 are inserted in two opposed directions alternatively and fixed with the pin shafts 20 of the driving grate sheet chain 18 , the adjacent driven grate sheets 19 are overlapped or connected with each other, and on a side wall of the grate sheet support 17 there is a ash discharge exit 21 .
- the link 12 is connected with a driver 22 .
- a driving chain pulley shaft 24 is connected with a power
Abstract
The invention relates to a stoker grates for circulating burning-up, wherein the existing reciprocal-type or chain-type grates are designed to be a long annular-shape with front and rear ends closed, resulting in burning-up of coal and thus overcoming the following defects of the existing coal-firing stokers: the coal remains on the grate shortly and can not be completely burn up, causing a waste of coal and low combustion efficiency.
Description
- The invention relates to a boiler stoker, specially, to the grate of horizontal circulating burning-up.
- At present the grates for stoker-fired boiler can be classified in structure into two kinds, i.e. the reciprocating grate and the chain grate. The fuel is fed continuously to one end of the grate surface and travels horizontally across the grate as it burns. The residual ash is discharged from the opposite end. The above mentioned stoker grates have the following defects: 1) the coal is ignited mainly by means of the heat radiation from the furnace arch, the ignition begins from the upper layer towards the lower layer of the coal bed in a direction which is opposite to the direction of air flow, resulting in an unfavorable burning state and cause incomplete combustion; 2) the resident time of coal burning on the grate can not be long as the grate has a limited length, so the coal can not be fully burn up; and 3) the bottom layer of the coal is ignited at last, resulting in the fine coal particles to leak out from the vent slits of the grate and cause a big loss of coal.
- An object of the present invention is to provide a boiler stoker for horizontal circulating burning-up, which overcome the following defects of the reciprocating and chain grates used for the existing coal-fired stokers: the resident time of coal burning on the grate is insufficient, the ignition of coal mainly by means of the heat radiation from the furnace, so the coal can not be fully burn up, and the fine coal particles in the bottom layer is easy to leak out from the vent slits of the grate and lead to a remarkable coal loss.
- In order to achieve the object of this invention, the technical scheme is as follows: Let the both ends of the conventional stoker grate connect together and make an enclosed long annular moving grate. The coal is burn on the long annular grate with a pattern of horizontal circulating burning.
- The first aspect of the invention comprises a stationary grate sheets support, moveable grate sheets supports fitting with prop rolls on the stationary grate sheets support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheets support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheets supports and a driving unit, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, the mentioned stationary grate sheets support has a long annular shape, the mentioned moveable sheet supports comprise a pair of rectangular supports opposed to each other and another pair of annular-shaped moveable grate sheet supports opposed to each other so as to form a long annular-shaped assembled support, the mentioned driving unit is a set of bearing units which are mounted on the stationary grate sheet support, oscillating rods are connected between the bearings of said bearing units, and at least one of the rectangular moveable grate sheet supports and the arc-shaped moveable furnace grate sheet supports in said moveable grate sheet supports, the arc-shaped or rectangular moveable grate sheet support connected with said oscillating rods is a driving moveable grate sheet support, the arc-shaped or rectangular moveable grate sheet support not connected with said oscillating rods is a driven moveable grate sheet support, the adjacent driving moveable grate sheet support is hinged to the driven moveable grate sheet support and the driven moveable grate sheet supports are hinged, and one of said oscillating rods is connected with a power input link.
- The second aspect of the invention comprises a stationary grate sheet support, moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, and moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, said stationary grate sheet support has a long annular shape, said moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other so as to form a long annular shape assembled support, said rectangular moveable grate sheet supports is hinged with the arc-shaped moveable grate sheet supports, and one of the said rectangular moveable grate sheet support or arc-shaped moveable grate sheet support is connected with a power input link.
- The third aspect of the invention comprises a stationary grate sheet support, moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, and a transmission unit, wherein the moveable grate sheets and the stationary grate sheets are placed alternatively, both the said stationary grate sheet support and moveable grate sheet supports have a long annular shape, the said transmission unit is a bearing unit which is located at the center of said moveable grate sheet supports and fixed to said stationary grate sheet support, an oscillating rod is connected between the bearing of said bearing unit and said moveable grate sheet supports, and said oscillating rod is connected with a power input link.
- The fourth aspect of the invention comprises a grate support, a chain and a transmission unit, wherein the chain comprises a driving grate sheet chain and a driven grate sheets, the said driving grate sheet chain has a horizontal annular shape structure, the driven grate sheets are inserted in two opposed directions alternatively and fixed with the pin shafts of the driving grate sheet chain, the sides of the adjacent driven furnace grate sheets are overlapped or connected with each other, and there are one or more ash discharge exits on the side wall of the grate support.
- The invention, as compared with the existing art, has the following features: the grate has a long annular shape structure, the coal can be circulated and burned on the grate, the resident time of coal burning on the grate can be much longer, the bottom burning coal layer forms a sufficient ignition heat source, the new feeding coal covers on the circulating burning coal layer, the combustion begins from the lower layer towards upper layer and keeps the same direction as that of the air flow, so as to form a complete combustion state. The invention has the following benefit effects: 1) the coal can be totally burning up and combustion efficiency can be remarkably improved, (increased by more than 11% as compared to the conventional coal-firing stoker); 2) the blackness and the dust emission in the flue gas can be much lower; 3) combustion can be performed at low temperature (900° C.), desulphurization and the lower concentration of harmful NOx in the flue gas are achieved, and the effect can be corresponding to that of the circulating fluidized-bed furnace; 4) the coal of low heating value (as low as 12.56 MJ/kg) can be burnt; and 5) the comprehensive operation cost is only a half of that of a circulating fluidized-bed furnace.
-
FIG. 1 is a schematic plan view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is two sets of bearing units; -
FIG. 2 is an enlarged structure schematic view of a stoker grate for circulating burning-up taken along A-A inFIG. 1 . In the case that said moveable grate sheet supports are long annular shape assembled supports and said transmission unit is two sets of bearing units; -
FIG. 3 is a structure schematic view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is one set of bearing unit located at the center of the stationary grate sheet support; -
FIG. 4 is a structure schematic plan view of a stoker grate for circulating burning-up in the case that the said moveable grate sheet supports are long annular shape assembled supports and the said transmission unit is one set of bearing unit located on outside of the stationary grate sheet support; -
FIG. 5 is a structural top view of a stoker grate for circulating burning-up in the case that there is no said bearing unit; -
FIG. 6 is a structure schematic view of a stoker grate for circulating burning-up in the case that both stationary grate sheet support and moveable grate sheet supports have a annular shape; and -
FIG. 7 is a schematic view of a stoker grate for circulating burning-up in the case that it is consisted of a chain structure. - Hereinafter, the preferred embodiments of the invention will be described with reference to the drawings. In an embodiment shown as in
FIGS. 1 and 2 , the grate comprises a stationarygrate sheet support 1, moveable grate sheet supports fitting with prop rolls 2 on the stationarygrate sheet support 1, thestationary grate sheets 4 fitting with mounting transverse beams 3 of the stationarygrate sheet support 1,moveable grate sheets 6 fitting with mountingtransverse beams 5 of the moveable grate sheet support, and a transmission unit, wherein themoveable grate sheets 6 and thestationary grate sheets 4 are disposed alternatively, the stationarygrate sheet support 1 has a long annular shape, the moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports 7 opposed to each other and another pair of semi-annular moveable grate sheet supports 8 opposed to each other to form a long annular shape assembled support, the transmission unit is two sets ofbearing units grate sheet support 1, and which are located at the centers of the semi-annular moveable grate sheet supports 8, respectively, oscillatingrods 11 are connected respectively between the bearings of thebearing units grate sheet support 8, and between rectangular moveable grate sheet supports 7. One of the oscillatingrods 11 is connected with apower input link 12. Between thestationary grate sheets 4 and themoveable grate sheets 6 in the burning-up zone there areash falling slits 13 of 15-20 mm, under which there is a ash discharge opening 14. In an embodiment shown as inFIG. 3 , a transmission unit is a set ofbearing unit 9 which is located at the center of said stationarygrate sheet support 1, anoscillating rod 11 is connected between the bearing of thebearing unit 9 and the middle portion of the rectangular moveable grate sheet supports 7, roller seats each with alimit roller 15 are bolt-fixed onto the inner walls on two sides of themoveable grate sheets 6 on the semi-annular moveable grate sheet supports 8 corresponding stationarygrate sheet support 1, andhinges 16 are connected between the rectangular moveable grate sheet supports 7 and the semi-annular moveable grate sheet supports 8. In an embodiment shown as inFIG. 4 , a transmission unit is a set ofbearing unit 9 which is located the outside of the stationarygrate sheet support 1, anoscillating rod 11 is connected between the bearing of thebearing unit 9 and one of the semi-annular moveable grate sheet supports 8 in the moveable grate sheet supports, and roller seats each with alimit roller 15 are bolt-fixed onto the inner walls on two sides of themoveable grate sheets 6 on the semi-annular moveable grate sheet supports 8 of stationarygrate sheet support 1. In an embodiment without said bearing unit shown as inFIG. 5 , one of said rectangular moveable grate sheet supports 7 or semi-annular shape moveablegrate sheet supports 8 is connected with apower input link 12, andlimit rollers 23 are fixed onto the inner walls on outside plate at the semi-annular moveable grate sheet supports 8 of stationarygrate sheet support 1. In an embodiment shown as inFIG. 6 , a grate comprises a stationarygrate sheet support 1, a moveable grate sheet support fitting with prop rolls 2 on the stationarygrate sheet support 1,stationary grate sheets 4 fitting with mounting transverse beams of the stationarygrate sheet support 1,moveable grate sheets 6 fitting with mounting transverse beams of the moveable grate sheet support, and a transmission unit, wherein themoveable grate sheets 6 and thestationary grate sheets 4 are disposed alternatively, both the stationarygrate sheet support 1 and the moveable grate sheet support are annular in shape, the transmission unit is abearing unit 9 which is fixed to the stationarygrate sheet support 1, and which are located at the center of the annular of the moveable grate sheet support, respectively, oscillatingrods 11 are connected between the bearing of thebearing unit 9 and the moveable grate sheet support, one of the oscillatingrods 11 is connected with apower input link 12. Between thestationary grate sheets 4 and between themoveable grate sheets 6 there areash falling slits 13 of 15-20 mm above a ash discharge opening 14 correspondingly. In an embodiment shown as inFIG. 7 , a grate comprises agrate support 17, a chain and a transmission unit, wherein the chain comprises a drivinggrate sheet chain 18 and a drivengrate sheets 19, the drivinggrate sheet chain 18 has a horizontal long annular shape structure, the drivengrate sheets 19 are inserted in two opposed directions alternatively and fixed with thepin shafts 20 of the drivinggrate sheet chain 18, the adjacent drivengrate sheets 19 are overlapped or connected with each other, and on a side wall of thegrate sheet support 17 there is aash discharge exit 21. When the embodiments shown inFIGS. 1-6 are been carried out, thelink 12 is connected with adriver 22. When the embodiment shown inFIG. 7 is been carried out, a drivingchain pulley shaft 24 is connected with a power input device.
Claims (20)
1. The stoker grate according to claim 14 , the moveable grate sheet supports fitting with prop roll on the stationary grate sheet support, the stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, the moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, said moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other to form a long annular-shaped assembled support, said transmission unit is bearing units which are fixed to the stationary grate sheet support, an oscillating rod is connected between the bearings of said bearing units, and at least one of the rectangular moveable grate sheet supports and the arc-shaped moveable grate sheet supports in said moveable grate sheet supports, the arc-shaped or rectangular moveable grate sheet support connected with said oscillating rod is a driving moveable grate sheet support, the arc-shaped or rectangular moveable grate sheet support not connected with said oscillating rod is a driven moveable grate sheet support, the driving moveable grate sheet support is hinged to the adjacent driven moveable grate sheet support and the driven moveable grate sheet supports are hinged to each other, said oscillating rod is connected with a power input link.
2. The stoker grate according to claim 1 , characterized by that: said transmission unit is two sets of said bearing units which are located at the centers of the semi-annular to form the arc of the arc-shaped moveable grate sheet supports, respectively, and oscillating rods are connected between the bearings of said bearing units and respective arc-shaped moveable grate sheet support, and between said rectangular moveable grate sheet supports.
3. The stoker grate according to claim 1 , characterized by that: said transmission unit is one set of said bearing unit which is located at the center of said stationary grate sheet support, oscillating rods are connected between the bearing of said bearing unit and middle portion of two said rectangular moveable grate sheet supports, and roller seats with a limit roller are bolt-fixed onto the inner walls on two sides of the moveable grate sheets on said arc-shaped moveable grate sheet supports corresponding stationary grate sheet support.
4. The stoker grate according to claim 1 , characterized by that: said transmission unit is one set of said bearing unit which is located on the outside of said stationary grate sheet support, oscillating rods are connected between the bearing of said bearing unit and one of said rectangular moveable grate sheet support or arc-shaped moveable grate sheet support in said moveable grate sheet supports, and roller seats with a limit roller are bolt-fixed onto the inner walls on two sides of the moveable furnace grate sheets on said arc-shaped moveable grate sheet supports corresponding stationary grate sheet support.
5. The stoker grate according to claim 1 , characterized by that: said arc-shaped moveable grate sheet supports have a semicircular shape.
6. The stoker grate according to claim 1 , characterized by that: between said stationary grate sheets and between said moveable grate sheets in a burning-up zone there are ash falling slits of 15-20 mm.
7. The stoker grate according to claim 15 , the moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, the stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, the moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, said moveable grate sheet supports comprise a pair of rectangular moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other to form a annular-shaped assembled support; said rectangular moveable furnace grate sheet supports is hinged with the annular-shape moveable grate sheet supports; said rectangular moveable grate sheet support or arc-shaped moveable grate sheet support is connected with a power input link.
8. The stoker grate according to claim 7 , characterized by that: limit rollers are fixed onto the inner walls on outsides plates at the place where stationary grate sheet support corresponds to said arc-shaped moveable grate sheet supports.
9. The stoker grate according to claim 7 , characterized by that: said arc-shaped moveable grate sheet supports have a semicircular shape.
10. The stoker grate according to claim 7 , characterized by that: between said stationary grate sheets and between said moveable grate sheets in a burning-up zone there are ash falling slits of 15-20 mm.
11. The stoker grate according to claim 1 the moveable grate sheet supports fitting with prop rolls on the stationary grate sheet support, the stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, the moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet supports, characterized by that: both said stationary grate sheet support and said moveable grate sheet supports have a annular shape; said transmission unit is a bearing unit which is located at the center of said moveable grate sheet supports and fixed to said stationary grate sheet support; an oscillating rod is connected between the bearing of said bearing unit and said moveable grate sheet supports, and said oscillating rod is connected with a power input link.
12. The stoker grate according to claim 11 , characterized by that: between said stationary grate sheets and between said moveable grate sheets in a burning-up zone there are ash falling slits of 15-20 mm.
13. A stoker grate for circulating combustible material, comprising a grate support, a chain and a transmission unit, characterized by that: the chain comprises a driving grate sheet chain and a driven grate sheets; said driving grate sheet chain has a horizontal annular shape structure, the driven grate sheets are inserted in two opposed directions alternatively and fixed with, through pin, said driving grate sheet chain, the sides of the adjacent driven grate sheets are overlapped or connected with each other, and an ash discharge opening is provided on a side wall of the grate support.
14. A stoker grate for circulating a combustible material, comprising a stationary grate sheet support, moveable grate sheet supports moveably connected to the stationary grate sheet support, stationary grate sheets fitting with the stationary grate sheet support, moveable grate sheets fitting with the moveable grate sheet supports, and a transmission unit, the moveable grate sheets and the stationary grate sheets being disposed alternatingly, the stationary grate sheet support having a long annular shape.
15. A stoker grate for circulating a combustible material, comprising a stationary grate sheet support, moveable grate sheet supports moveably connected to the stationary grate sheet support, stationary grate sheets fitting with the stationary grate sheet support, moveable grate sheets fitting with the moveable grate sheet supports, the moveable grate sheets and the stationary grate sheets being disposed alternatingly, the stationary grate sheet support having an annular shape.
16. The stoker grate according to claim 2 , characterized by that: said arc-shaped moveable grate sheet supports have a semicircular shape.
17. The stoker grate according to claim 3 , characterized by that: said arc-shaped moveable grate sheet supports have a semicircular shape.
18. The stoker grate according to claim 4 , characterized by that: said arc-shaped moveable grate sheet supports have a semicircular shape.
19. The stoker grate according to claim 2 , characterized by that: between said stationary grate sheets and between said moveable grate sheets in a burning-up zone there are ash falling slits of 15-20 mm.
20. The stoker grate according to claim 3 , characterized by that: between said stationary grate sheets and between said moveable grate sheets in a burning-up zone there are ash falling slits of 15-20 mm.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/097,115 US20050199163A1 (en) | 2002-10-02 | 2005-04-01 | Stoker grates for circulating burning-up |
US12/012,965 US8051786B2 (en) | 2002-10-02 | 2008-02-06 | Stoker grates for circulating combustible material |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN02259882.0 | 2002-10-02 | ||
CN02259882U CN2573878Y (en) | 2002-10-02 | 2002-10-02 | Circulating burn-up grate |
PCT/CN2003/000821 WO2004031653A1 (en) | 2002-10-02 | 2003-09-25 | Circulating firing grate for complete combustion |
US11/097,115 US20050199163A1 (en) | 2002-10-02 | 2005-04-01 | Stoker grates for circulating burning-up |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2003/000821 Continuation WO2004031653A1 (en) | 2002-10-02 | 2003-09-25 | Circulating firing grate for complete combustion |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/012,965 Continuation US8051786B2 (en) | 2002-10-02 | 2008-02-06 | Stoker grates for circulating combustible material |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050199163A1 true US20050199163A1 (en) | 2005-09-15 |
Family
ID=27794893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/097,115 Abandoned US20050199163A1 (en) | 2002-10-02 | 2005-04-01 | Stoker grates for circulating burning-up |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050199163A1 (en) |
CN (1) | CN2573878Y (en) |
AU (1) | AU2003271033A1 (en) |
RU (1) | RU2287740C2 (en) |
WO (1) | WO2004031653A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104266201A (en) * | 2014-10-14 | 2015-01-07 | 济南锅炉集团有限公司 | Composite grate combustion equipment |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2035128A (en) * | 1934-05-14 | 1936-03-24 | Furnaslave Inc | Underfeed stoker grate |
US2183386A (en) * | 1939-02-11 | 1939-12-12 | Nat Engineering & Mfg Co Inc | Mechanical stoker |
US2777406A (en) * | 1952-08-11 | 1957-01-15 | Flynn & Emrich Company | Refuse burning furnace |
US3221679A (en) * | 1963-05-22 | 1965-12-07 | Morse Boulger Inc | Automatic stoking grates |
US3460818A (en) * | 1966-05-31 | 1969-08-12 | Mckee & Co Arthur G | Apparatus for treatment of particulate material on moving support |
US4018168A (en) * | 1975-03-17 | 1977-04-19 | Von Roll Ag | Incinerator feed |
US4437452A (en) * | 1979-07-31 | 1984-03-20 | Detroit Stoker Company | Rotary continuous ash discharge stoker |
US5269287A (en) * | 1991-02-18 | 1993-12-14 | Noell K&K Abfalltechnik Gmbh | Furnace grate |
US5538128A (en) * | 1993-10-21 | 1996-07-23 | W + E Umwelttechnik Ag | Grate for a furnace |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN86205040U (en) * | 1986-07-26 | 1987-03-18 | 锦州市炉排厂 | Reciprocating grate with actuating unit |
CN2363183Y (en) * | 1998-12-07 | 2000-02-09 | 罗机宣 | Horizontal reciprocating fire grate coal burning machine |
-
2002
- 2002-10-02 CN CN02259882U patent/CN2573878Y/en not_active Expired - Lifetime
-
2003
- 2003-09-25 WO PCT/CN2003/000821 patent/WO2004031653A1/en not_active Application Discontinuation
- 2003-09-25 AU AU2003271033A patent/AU2003271033A1/en not_active Abandoned
- 2003-09-25 RU RU2005113273/06A patent/RU2287740C2/en active
-
2005
- 2005-04-01 US US11/097,115 patent/US20050199163A1/en not_active Abandoned
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2035128A (en) * | 1934-05-14 | 1936-03-24 | Furnaslave Inc | Underfeed stoker grate |
US2183386A (en) * | 1939-02-11 | 1939-12-12 | Nat Engineering & Mfg Co Inc | Mechanical stoker |
US2777406A (en) * | 1952-08-11 | 1957-01-15 | Flynn & Emrich Company | Refuse burning furnace |
US3221679A (en) * | 1963-05-22 | 1965-12-07 | Morse Boulger Inc | Automatic stoking grates |
US3460818A (en) * | 1966-05-31 | 1969-08-12 | Mckee & Co Arthur G | Apparatus for treatment of particulate material on moving support |
US4018168A (en) * | 1975-03-17 | 1977-04-19 | Von Roll Ag | Incinerator feed |
US4437452A (en) * | 1979-07-31 | 1984-03-20 | Detroit Stoker Company | Rotary continuous ash discharge stoker |
US5269287A (en) * | 1991-02-18 | 1993-12-14 | Noell K&K Abfalltechnik Gmbh | Furnace grate |
US5538128A (en) * | 1993-10-21 | 1996-07-23 | W + E Umwelttechnik Ag | Grate for a furnace |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104266201A (en) * | 2014-10-14 | 2015-01-07 | 济南锅炉集团有限公司 | Composite grate combustion equipment |
Also Published As
Publication number | Publication date |
---|---|
RU2287740C2 (en) | 2006-11-20 |
WO2004031653A1 (en) | 2004-04-15 |
RU2005113273A (en) | 2005-09-20 |
CN2573878Y (en) | 2003-09-17 |
AU2003271033A1 (en) | 2004-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |