CN203489299U - Grate type coal feeding device - Google Patents
Grate type coal feeding device Download PDFInfo
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- CN203489299U CN203489299U CN201320626986.4U CN201320626986U CN203489299U CN 203489299 U CN203489299 U CN 203489299U CN 201320626986 U CN201320626986 U CN 201320626986U CN 203489299 U CN203489299 U CN 203489299U
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- coal
- grate
- reflection arch
- atresia
- fire grate
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Abstract
The utility model discloses a grate type coal feeding device. The grate type coal feeding device comprises a coal bucket, a coal gate, a holeless grate, a transmission mechanism and a reflection arch, wherein the coal gate is arranged on a coal outlet of the coal bucket, the transmission mechanism is used for driving the holeless grate to move, and the reflection arch is formed in the mode that the portion, close to the side with the holeless grate, of a furnace wall extends towards the coal bucket in an inclined mode. According to the grate type coal feeding device, due to the facts that part of the furnace wall is arranged in the inclined mode to form the reflection arch, and a preheating space is formed between the reflection arch and the grate, coal can be preheated before entering an internal furnace to burn, and can immediately burn after entering the internal furnace, and combustion efficiency is remarkably improved; the grate type coal feeding device is simple in structure, low in cost and stable and reliable in operation.
Description
Technical field
The utility model relates to boiler technology field, relates in particular to a kind of grate-type coal feeder.
Background technology
Technology of Circulating Fluidized Bed Boiler coal-feeding mode is varied, for example spiral coal supply, belt coal supply, disk coal supply etc.Although above-mentioned coal-feeding mode is stable, coal is the state of cooling when entering hearth combustion.The coal of the state of cooling enter need after burner hearth through preheating and drying, fugitive constituent separate out, the process such as carbon grain combustion, those processes have extended the time of coal combustion undoubtedly.When CFBB adopts fugitive constituent and the lower coal of calorific value, above-mentioned coal-feeding mode makes raw coal enter preheating and drying after stove, fugitive constituent to separate out the required time and greatly extend, the caloric receptivity of coal is increased, and boiler combustion efficiency reduces, and even also can produce flame-out phenomenon.
Existing grate-type coal feeder, the Chinese patent that for example publication number is CN2347056Y " the coal-fired vaporization of stoker fired grate formula combustion apparatus ", it by all sealing with chimney arch above stoker fired grate, make to form vaporizing combustor between stoker fired grate and chimney arch, yet this device is excessive to the transformation of furnace roof, cost is improved greatly, and in fire coal, fixed carbon can not get abundant burning, does not also mention in addition the improvement to fire grate.
Summary of the invention
Technical problem to be solved in the utility model is, for the above-mentioned deficiency of prior art, proposes that a kind of cost is lower, coal supply stable, improves the grate-type coal feeder of burning in circulating fluid bed boiler efficiency.
The technical scheme that the utility model solves its technical problem employing is, a kind of grate-type coal feeder is proposed, it comprises coal bunker, be arranged at the coal gate of coal bunker coal outlet, atresia fire grate, drive transmission mechanism and the reflection arch of the motion of atresia fire grate, described reflection arch to be tilted to extend to coal bunker direction by the furnace wall near atresia fire grate one side to form.
Further, described transmission mechanism is stepless time adjustment transmission mechanism.
Further, the reflection arch being obliquely installed makes to form preheating space between atresia fire grate and reflection arch, coal enters this preheating space by coal gate, and the high-temperature flue gas heat in burner hearth reflexes on the low temperature coal on atresia fire grate by reflection arch, makes coal before being delivered to burner hearth, carry out preheating.
Further, described reflection arch is near the end points next-door neighbour coal gate setting of coal bunker.
The utility model, by part furnace wall is obliquely installed to formation reflection arch, forms preheating space between reflection arch and fire grate, thereby makes coal preheating in advance before entering hearth combustion, can burn immediately after entering burner hearth, and efficiency of combustion is significantly improved.The utility model is simple in structure simultaneously, cost is lower and stable and reliable operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of grate-type coal feeder.
The specific embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
Please refer to Fig. 1, Fig. 1 is the structural representation of the utility model grate-type coal feeder.In Fig. 1, grate-type coal feeder comprises coal bunker 10, is arranged at the coal gate 20 of coal bunker coal outlet, atresia fire grate 30, drive transmission mechanism 40 and the reflection arch 50 of 30 motions of atresia fire grate.Reflection arch 50 is extended and forms to coal bunker 10 directions inclinations by the furnace wall 60 near atresia fire grate 30 1 sides.
The reflection arch 50 being obliquely installed makes to form between atresia fire grate 30 and reflection arch a preheating space 51 that is similar to sealing, coal 100 enters after this preheating space 51 by coal gate 20, and the high-temperature flue gas in burner hearth 70 can reflex on the low temperature coal 100 that is positioned over atresia fire grate 30 by reflection arch 50.Transmission mechanism 40 drives 30 motions of atresia fire grates, make low temperature coal 100 in being transported to burner hearth 70 between always in the interior preheating of preheating space 51.The moving process of low temperature coal 100 from coal sluice gate 20 to burner hearth 70, due to the existence of preheating space 51, make the temperature of the low temperature coal 100 400 ℃ of left and right of can rising, coal ignition immediately after entering burner hearth, efficiency of combustion significantly improves.
Preferably, the utility model is by the coal seam thickness that adopts coal gate 20 to control on atresia fire grate 30, transmission mechanism 40 adopts stepless time adjustment transmission mechanisms to adjust furnace coal weight, adopts atresia fire grate 30 to eliminate and leaks coal phenomenons, make in the utility model that the efficiency of combustion in coal seam is higher, waste still less.
Please, referring again to Fig. 1, in the utility model, reflection arch 50 is the ramped shaped of inclination, and the end points next-door neighbour coal gate setting near coal bunker, makes reflection arch 50 the longest with the length that atresia fire grate 30 forms preheating space 51.Can imagine ground, in order to increase the volume of preheating space 51, also reflection arch 50 can be set to other shapes, such as being circular-arc etc.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (4)
1. a grate-type coal feeder, it is characterized in that: comprise coal bunker, be arranged at coal bunker coal outlet coal gate, atresia fire grate, drive transmission mechanism and the reflection arch of the motion of atresia fire grate, described reflection arch to be tilted to extend to coal bunker direction by the furnace wall near atresia fire grate one side to form.
2. grate-type coal feeder according to claim 1, is characterized in that: described transmission mechanism is stepless time adjustment transmission mechanism.
3. grate-type coal feeder according to claim 1, it is characterized in that: the reflection arch being obliquely installed makes to form preheating space between atresia fire grate and reflection arch, coal enters this preheating space by coal gate, high-temperature flue gas heat in burner hearth reflexes on the low temperature coal on atresia fire grate by reflection arch, makes coal before being delivered to burner hearth, carry out preheating.
4. grate-type coal feeder according to claim 1, is characterized in that: described reflection arch is near the end points next-door neighbour coal gate setting of coal bunker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626986.4U CN203489299U (en) | 2013-09-27 | 2013-09-27 | Grate type coal feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626986.4U CN203489299U (en) | 2013-09-27 | 2013-09-27 | Grate type coal feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203489299U true CN203489299U (en) | 2014-03-19 |
Family
ID=50260129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320626986.4U Expired - Fee Related CN203489299U (en) | 2013-09-27 | 2013-09-27 | Grate type coal feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203489299U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401755A (en) * | 2017-08-02 | 2017-11-28 | 大唐东北电力试验研究所有限公司 | The energy conserving system of station boiler steam turbine |
-
2013
- 2013-09-27 CN CN201320626986.4U patent/CN203489299U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401755A (en) * | 2017-08-02 | 2017-11-28 | 大唐东北电力试验研究所有限公司 | The energy conserving system of station boiler steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20180927 |
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| CF01 | Termination of patent right due to non-payment of annual fee |