CN201262396Y - Coal feeder of circulating fluidized bed boiler - Google Patents
Coal feeder of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN201262396Y CN201262396Y CNU2008201484793U CN200820148479U CN201262396Y CN 201262396 Y CN201262396 Y CN 201262396Y CN U2008201484793 U CNU2008201484793 U CN U2008201484793U CN 200820148479 U CN200820148479 U CN 200820148479U CN 201262396 Y CN201262396 Y CN 201262396Y
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- coal
- sleeve
- transport tube
- air outlet
- conveying cylinder
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Abstract
The utility model discloses a coal feeder of a circulating fluidized bed boiler, which comprises a motor, a coal feeding hooper, a conveying cylinder and a spiral propeller, wherein, the outer circle of the conveying cylinder is sheathed with a sleeve, an annular gap between the sleeve and the conveying cylinder is arranged as an air supply channel, the front part of the sleeve is provided with an air inlet, and the annular gap between the sleeve and the output end of the conveying cylinder is provided with an air baffle plate and an air outlet. The spiral propeller is directly connected with a hearth, and suspended coke which is accumulated at a coal feeding port can be crushed simultaneously when fire coal is pushed into the hearth, therefore, blockage can not be caused. In addition, as coal pressing air and coal feeding air supplied by the sleeve and the air outlet at the rear end of the conveying cylinder can prevent the fine pulverized coal at the upper part from rising up, and prevent coal particles at the coal feeding port from congregating into groups, the uniformity of coal feeding is ensured, and the coking of fire coal at the coal feeding port is further prevented. The coal feeder not only can solve the blockage at the coal feeding port, but also can reduce the heat loss of fly ash incomplete combustion.
Description
Technical field
The utility model relates to a kind of CFBB, relates in particular to a kind of coal feeder of CFBB.
Background technology
The coal supply of general CFBB is by the stokehold feeder fire coal to be sent into downward-sloping coal-feeding tube, and the coal-fired gravity that relies on falls into burner hearth by coal-feeding tube, mixes with the hot-air of sending here from bellows and burns.But this coal-feeding mode is when using the coking capacity coal, and the junction of coal-feeding tube and burner hearth is easy to be stopped up by the coal of coking, ash, causes boiler normally to move.
Summary of the invention
The purpose of this utility model provides a kind of coal feeder that is not only applicable to common coal, is particularly useful for the CFBB of coking capacity coal, this device not only can prevent to hang the burnt obstruction that causes because of coal feeding hole, can also make coal supply evenly, be beneficial to burning, and reduce the flying dust heat loss due to incomplete combustion.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is: the coal feeder of this CFBB comprises support and is arranged on motor, feeding-coal bucket, the transport tube that is communicated with feeding-coal bucket on the support and is arranged on the interior spiral propeller of transport tube, motor is connected with spiral propeller, it is characterized in that: the cylindrical at transport tube is with sleeve, be provided with the annular gap between sleeve and the transport tube, the front end of sleeve is positioned at the rear of feeding-coal bucket, front end face at sleeve is provided with annular hush panel, and the interior circle of hush panel is connected with the cylindrical of transport tube; Be provided with air inlet and intake stack in the front portion of sleeve, the annular gap between sleeve rear end and the transport tube output is provided with deep bead and air outlet.
Described air inlet has two, and a top that is positioned at the sleeve cylindrical is to press coal wind air inlet; The bottom that another is positioned at the sleeve cylindrical is the coal spread wind air inlet; On two air inlets, be connected with intake stack respectively.
Place, annular gap between sleeve and transport tube rear end face is symmetrically set with the deep bead of two sections arcs, the arc port that is stayed between the upper side edge of two sections deep beads is for pressing coal wind air outlet, and the arc port that is stayed between the lower side of two sections deep beads is the coal spread wind air outlet.
Angle between the described pressure coal wind air outlet arc length two ends is 80 °～90 °, and the angle between the described coal spread wind air outlet arc length two ends is 90 °～100 °.
Because transport tube directly is connected with burner hearth with the interior spiral propeller of tube, and fire coal is being forced to advance in the process of burner hearth, can be crowded broken extension Jiao who accumulates in coal feeding hole simultaneously, thus can not result in blockage.In addition, the pressure coal wind air outlet that is arranged on the top, annular gap between sleeve and the transport tube rear end blows out the pressure coal wind of arc surfaced, and the fines with lightweight is controlled at the emulsion zone burning to greatest extent.And the coal spread wind of the arc surfaced that bottom coal spread wind air outlet blows out, can will sow out along cambered surface by the fire coal that coal feeding hole is sent, guaranteed the uniformity of coal supply to greatest extent, washing away of high wind speed makes the very difficult gathering of coal grain agglomerating simultaneously, further limited coal-fired in the coal feeding hole coking.Both prevent the obstruction of coal feeding hole, reduced the flying dust heat loss due to incomplete combustion again.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view.
The specific embodiment
The coal feeder of this CFBB is installed in apart from the top of air distribution plate 500mm, comprise support 9 and be arranged on motor 10, feeding-coal bucket 1, the transport tube 5 that is communicated with feeding-coal bucket 1 on the support and be contained in the interior spiral propeller 3 of transport tube, motor 10 is connected with spiral propeller 3, is provided with reducing gear in the motor 10.Cylindrical at transport tube 5 is with sleeve 6, is provided with the gap of annular between sleeve 6 and the transport tube 5, and the front end of sleeve 6 is positioned at the rear of feeding-coal bucket 1, is provided with air inlet and intake stack in its front portion.Annular gap between the rear end of sleeve 6 and transport tube 5 outputs is provided with deep bead and air outlet.In order to make between sleeve and the transport tube annular passage that forms a front end sealing, rear end air-out, be welded with the hush panel of annular at the front end face of sleeve, the interior circle of hush panel is connected with the cylindrical of transport tube.In addition, in order to produce enough wind-force, be provided with two air inlets in the front portion of sleeve 6 in the present embodiment, the top that one of them is positioned at sleeve 6 cylindricals is to press coal wind air inlet 2; The bottom that another is positioned at the sleeve cylindrical is a coal spread wind air inlet 8; Be connected with intake stack respectively on two air inlets, two intake stacks are connected with air blast on the boiler respectively.In addition, also an air inlet and intake stack can only be set as required.For wind direction channeling conduct to outlet, place, annular gap between sleeve 6 and transport tube 5 rear end faces is provided with symmetrical two sections arc wind boards 11, arc port is for pressing coal wind air outlet 4 on being stayed between the upper side edge of two sections deep beads 11, and the arc lower mouth that is stayed between the lower side of two sections deep beads is a coal spread wind air outlet 7.In the present embodiment, the angle between the arc length two ends of described pressure coal wind air outlet 4 is set between 80 °～90 °, and the angle between the described coal spread wind air outlet 7 arc length two ends is set between 90 °～100 °.In addition, also can be with the angular range between the arc length two ends of pressure coal wind air outlet 4 and coal spread wind air outlet 7 respectively to about 10 ° of two ends expansions.In addition, the annular gap between sleeve and transport tube rear end face place is not provided with arc wind board, in the annular passage between sleeve and transport tube four axial dividing plates is set and adopt, to form upper and lower two methods of air intake passage independently.
Its operation principle is: fire coal enters transport tube 5 by feeding-coal bucket 1, under the promotion of spiral propeller 3, enter the coal feeding hole of burner hearth, the wind that air blast send is discharged from air outlet by the circular passage that is arranged between sleeve 6 and transport tube 5 rear ends, the pressure coal wind that is blown out arc surfaced by the pressure coal wind air outlet 4 on top is controlled at the emulsion zone burning with the fines of lightweight to greatest extent, the coal spread wind of the arc surfaced that is blown out by bottom coal spread wind air outlet 7 will be sowed out along cambered surface by the fire coal that coal feeding hole is sent, guaranteed the uniformity of coal supply, even simultaneously the washing away to make and be positioned at the big coal grain of coal feeding hole lower concentration and also be difficult to assemble agglomerating of high wind speed limited coal-fired in the coal feeding hole coking to greatest extent.If abnormal conditions make the coal feeding hole place produce coking, spiral propeller 3 also can be sent into burner hearth by coal spread wind, thereby prevented the obstruction of coal feeding hole hanging the burnt broken release coal feeding hole that squeezes simultaneously, has also reduced the flying dust heat loss due to incomplete combustion.
Claims (4)
1, a kind of coal feeder of CFBB, comprise support and be arranged on motor, feeding-coal bucket, the transport tube that is communicated with feeding-coal bucket on the support and be arranged on the interior spiral propeller of transport tube, motor is connected with spiral propeller, it is characterized in that: the cylindrical at transport tube is with sleeve, be provided with the annular gap between sleeve and the transport tube, the front end of sleeve is positioned at the rear of feeding-coal bucket, front end face at sleeve is provided with annular hush panel, and the interior circle of hush panel is connected with the cylindrical of transport tube; Be provided with air inlet and intake stack in the front portion of sleeve, the annular gap between sleeve rear end and the transport tube output is provided with deep bead and air outlet.
2, the coal feeder of CFBB according to claim 1 is characterized in that: described air inlet has two, and a top that is positioned at the sleeve cylindrical is to press coal wind air inlet; The bottom that another is positioned at the sleeve cylindrical is the coal spread wind air inlet; On two air inlets, be connected with intake stack respectively.
3, the coal feeder of CFBB according to claim 2, it is characterized in that: the place, annular gap between sleeve and transport tube rear end face is symmetrically set with the deep bead of two sections arcs, the arc port that is stayed between the upper side edge of two sections deep beads is for pressing coal wind air outlet, and the arc port that is stayed between the lower side of two sections deep beads is the coal spread wind air outlet.
4, the coal feeder of CFBB according to claim 3 is characterized in that: the angle between the described pressure coal wind air outlet arc length two ends is 80 °～90 °, and the angle between the described coal spread wind air outlet arc length two ends is 90 °～100 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201484793U CN201262396Y (en) | 2008-08-12 | 2008-08-12 | Coal feeder of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201484793U CN201262396Y (en) | 2008-08-12 | 2008-08-12 | Coal feeder of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262396Y true CN201262396Y (en) | 2009-06-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201484793U Expired - Fee Related CN201262396Y (en) | 2008-08-12 | 2008-08-12 | Coal feeder of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN201262396Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062391A (en) * | 2011-02-01 | 2011-05-18 | 何忠海 | Automatic helical feeding combustion boiler |
| CN102322644A (en) * | 2011-05-31 | 2012-01-18 | 中国神华能源股份有限公司 | Louver type damper and louver type damper door |
| CN102506421A (en) * | 2011-10-31 | 2012-06-20 | 徐州华美坑口环保热电有限公司 | Circulating fluid bed (CFB) boiler coal supply system for blending combustion of middling coal |
| CN102537949A (en) * | 2012-02-23 | 2012-07-04 | 无锡华光锅炉股份有限公司 | Coal feeding device of circulating fluidized bed boiler |
| CN105016091A (en) * | 2015-05-29 | 2015-11-04 | 内蒙古上海庙矿业有限责任公司 | Coal sale collecting/distributing device |
| CN106402845A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler burning system |
| CN112325277A (en) * | 2020-12-16 | 2021-02-05 | 无锡华光环保能源集团股份有限公司 | Coal-spreading air arrangement structure for boiler spiral coal feeder |
-
2008
- 2008-08-12 CN CNU2008201484793U patent/CN201262396Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062391A (en) * | 2011-02-01 | 2011-05-18 | 何忠海 | Automatic helical feeding combustion boiler |
| CN102322644A (en) * | 2011-05-31 | 2012-01-18 | 中国神华能源股份有限公司 | Louver type damper and louver type damper door |
| CN102506421A (en) * | 2011-10-31 | 2012-06-20 | 徐州华美坑口环保热电有限公司 | Circulating fluid bed (CFB) boiler coal supply system for blending combustion of middling coal |
| CN102506421B (en) * | 2011-10-31 | 2014-02-05 | 徐州华美坑口环保热电有限公司 | Circulating fluid bed (CFB) boiler coal supply system for blending combustion of middling coal |
| CN102537949A (en) * | 2012-02-23 | 2012-07-04 | 无锡华光锅炉股份有限公司 | Coal feeding device of circulating fluidized bed boiler |
| CN102537949B (en) * | 2012-02-23 | 2014-07-02 | 无锡华光锅炉股份有限公司 | Coal feeding device of circulating fluidized bed boiler |
| CN105016091A (en) * | 2015-05-29 | 2015-11-04 | 内蒙古上海庙矿业有限责任公司 | Coal sale collecting/distributing device |
| CN105016091B (en) * | 2015-05-29 | 2018-08-17 | 内蒙古上海庙矿业有限责任公司 | Sell terminal apparatus to a kind of coal |
| CN106402845A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler burning system |
| CN112325277A (en) * | 2020-12-16 | 2021-02-05 | 无锡华光环保能源集团股份有限公司 | Coal-spreading air arrangement structure for boiler spiral coal feeder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20130812 |