CN102128448A - Multifunctional coal bunker suitable for circulating fluidized bed boiler - Google Patents
Multifunctional coal bunker suitable for circulating fluidized bed boiler Download PDFInfo
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- CN102128448A CN102128448A CN 201110100385 CN201110100385A CN102128448A CN 102128448 A CN102128448 A CN 102128448A CN 201110100385 CN201110100385 CN 201110100385 CN 201110100385 A CN201110100385 A CN 201110100385A CN 102128448 A CN102128448 A CN 102128448A
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- storehouse
- cylindrical shell
- coal charge
- feed bin
- discharging opening
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Abstract
The invention relates to a multifunctional coal bunker suitable for a circulating fluidized bed boiler, which comprises a bunker cylinder (3), more than two discharge holes (A, B1 and B2), a central unloading machine (4) and a buffer device (5). The multifunctional coal bunker is characterized in that: the bunker cylinder (3) consists of an inner cylinder and an outer cylinder which form an inner bin and an outer bin of the bunker respectively; the discharge holes are positioned at the top of the bunker cylinder (3) and communicated with the inner bin or the outer bin respectively; and the central unloading machine (4) is positioned on the lower part of the bunker cylinder (3), and a supplied material sequentially passes through the central unloading machine (4) and the buffer device (5) and is fed into the boiler.
Description
Technical field
The present invention relates to a kind of multi-functional coal charge storehouse that is applicable to CFBB.
Background technology
Combustion technology of circulating fluidized is as one of clean combustion technology, with its have stronger fuel tolerance, less pollution emission, the higher thermal efficiency, good control and regulation performance, characteristics such as low-load combustion-stabilizing, start and stop and peaking performance are classified as encourage growth industry project by country for many years always preferably, thereby obtained at home using widely.
Yet in the CFBB starting ignition stage, on the burner hearth air distribution plate and material returning device place all needs to expect to tile and fill to start bed, to set up initial material circulation.In addition, when occurring bed temperature in the CFBB running when too high, when taking to increase the bed drain purge measure, can control effectively by the bed material of adjusting and dose suitable granularity, so startup bed material also can be used as a supplementary means adjusting and control Circulating Fluidized Bed Temperature.And its circulating ratio of different CFBBs is relatively-stationary with the bed pressure, generally speaking when the ash of fuel less than 10%～15% the time, then boiler is in operation and is difficult to keep smooth combustion, so need in time to dose the bed material in boiler running process, presses to keep the normal bed of boiler.
Startup bed material at present commonly used dose mode comprise manually dose, machinery is carried and is dosed, strength is carried and dosed, machinery and strength combination transfer are dosed etc., mode is simple, expense is cheap though manually dose, but it is big that the bed material is dosed the labour intensity of length consuming time, operations staff's screening and carrying, and be difficult to satisfy the requirement that needs feed supplement in some boiler running process.The system that the bed material is dosed in the machinery conveying is complicated, bed need to expect by artificial screening and be carried to special-purpose bucket elevator charging aperture, starts the bed feed bin and must be arranged near the boiler, and system invests bigger, and the bed material is dosed length consuming time.The strength conveying is dosed a bed material operation and maintenance level and is had relatively high expectations, and wayward to the amount of filling and the particle diameter of bed material, controllability is relatively poor, and easily plugging in process of pneumatic transmission.Machinery and strength combination transfer dose that a material system is complicated, the bed material still needs by artificial screening and be carried to special-purpose bucket elevator charging aperture, and operation and maintenance level is had relatively high expectations, and system's investment greatly.
Summary of the invention
The defective that the present invention exists from prior art just provides a kind of multi-functional coal charge storehouse that is applicable to CFBB, can be effectively for coal delivery of boiler and dose and start the bed material.
The multi-functional coal charge storehouse that is applicable to CFBB provided by the invention, comprise: feed bin cylindrical shell 3, two above discharging port A, B1, B2, center unloader 4 and buffer unit 5, it is characterized in that: feed bin cylindrical shell 3 is made up of inside and outside two cylindrical shells, constitutes the Nei Cang and the Wai Cang of feed bin respectively; Discharging opening is positioned at the top of feed bin cylindrical shell 3, and is communicated with interior storehouse or outer storehouse respectively; Center unloader 4 is positioned at feed bin cylindrical shell 3 bottoms, and the material that is supplied to is realized feed in boiler through center unloader 4, buffer unit 5 successively.
Preferably, adopt motor to control described discharging port A, B1, the opening and closing of B2, and in fill process, the open and-shut mode of the discharging port A that is communicated with interior storehouse and the discharging opening B1 that is communicated with outer storehouse, the open and-shut mode of B2 is just in time opposite.
Preferably, described center unloader 4 also comprises scraper 7, utilizes motor to drive scraper 7 rotations, to realize even feeding.
Preferably, described buffer unit 5 is the buffering awl.
Preferably, interior storehouse cylindrical shell is separated to form a plurality of branches cylindrical shell in the bottom near center unloader 4, and the outward-dipping umbrella that is of described branch cylindrical shell distributes.
Preferably, interior storehouse cylindrical shell becomes the rugby shape that two is thin about in the of, interlude is thicker.
On the other hand, the present invention also provides a kind of circulating fluidized bed boiler systems, comprise described multi-functional coal charge storehouse, also comprise and be used for the disintegrating machine 1 of comminuting matter, the transmitting device 2 of material and feeder 6, wherein the material that draws off through described multi-functional coal charge storehouse unloads and is filled to feeder 6, and feeder 6 raw coal and/or bed material the most at last is supplied in the boiler furnace.
The multi-functional coal charge storehouse that is applicable to CFBB provided by the invention, not only can under various boiler capacities and operating mode, utilize, and it is exerted oneself greatly possessing defeated coal and coal supply system, be that boiler is dosed CFBB and started the bed material in the time of advantage such as multiple functional, save construction investment and operating cost, greatly shorten the screening that starts the bed material, dose the time and alleviate operations staff's labour intensity, and make bed material dose in small, broken bits in the process, deironing, full automation such as weigh, safe and reliable to operation, simple, thereby thoroughly solved bed material that present CFBB generally adopts after manually sieving, manually dosed, machinery is carried and is dosed, machinery and strength combination transfer such as dose at existing problem.
Description of drawings
The schematic diagram of Fig. 1 circulating fluidized bed boiler systems of the present invention.
Scraper schematic diagram in the unloader of Fig. 2 center.
The schematic diagram of Fig. 3 discharging opening.
The specific embodiment
Below, 1-3 specifically describes the embodiment of the invention in conjunction with the accompanying drawings.
In conjunction with Fig. 1, CFBB of the present invention comprises and is used for the disintegrating machine 1 of comminuting matter, the transmitting device 2 of material, the end of transmitting device 2 is communicated with a plurality of discharging port A, B1 and B2, a plurality of discharging port A, B1 and B2 below are feed bin cylindrical shells 3, and the bottom of feed bin cylindrical shell 3 is center unloaders 4, also comprise buffer unit 5 on the discharge channel of connection center unloader 4, the terminal feeder 6 that directly is communicated with of discharge channel, feeder 6 raw coal or bed the most at last expect to be supplied in the boiler furnace 8.
Below, further describe the concrete structure in multi-functional coal charge of the present invention storehouse, multi-functional coal charge of the present invention storehouse is a kind of raw coal, bed material one Storage Silo, and it comprises feed bin cylindrical shell 3, a plurality of discharging port A, B1 and B2, center unloader 4, buffer unit 5.Feed bin cylindrical shell 3 is made up of inside and outside two cylindrical shells, constitutes the Nei Cang and the Wai Cang of feed bin respectively, thereby has formed the memory space of the mutual isolation that can be used for storing different material in feed bin.At the top of feed bin cylindrical shell 3 a plurality of discharging port A, B1 and B2 are set,, have improved charging efficient greatly so that feed bin is realized two above discharging point blankings simultaneously when the feed of top.In the present embodiment, referring to Fig. 3, at the top of cylindrical feed bin cylindrical shell 3 three discharging port A, B1 and B2 are set, discharging port A is positioned at the end face core, is connected with the interior storehouse of feed bin; Discharging opening B1 and discharging opening B2 are symmetrically distributed in the both sides of discharging port A, all are connected with the outer storehouse of feed bin, and material enters feed bin inside by discharging port A, B1 and B2.As a rule, interior storehouse is used for the required bed material of storage of fuels power plant CFBB, and outer storehouse is used to store raw coal.Certainly, if actual needs also can be provided with on the contrary.In order to realize the mutual isolation of different material, a motor mechanism that discharging port A, B1 and B2 are opened and closed operation also is set in addition, utilize the switching of three discharging openings of rotating operation control of motor M1.For example can be provided with like this, when motor operations, the open and-shut mode of discharging opening B1 and B2 is consistent, and just in time opposite with the open and-shut mode of discharging port A.As in the course of the work, when control discharging opening B1 and B2 were in open mode, discharging port A was then for closed condition, and this moment, material only can all be stored in the outer storehouse by discharging opening B1 and B2, and vice versa.
The lower part outlet of feed bin cylindrical shell 3 connects a center unloader 4.Referring to shown in Figure 2, this center unloader 4 comprises a scraper 7, adopts a motor M2 to drive scraper 7 rotations, stirs material by the rotation of scraper, thereby makes that exporting the different material that draws off from Nei Cang and outer storehouse is able to abundant mixing.
In addition, in order further to improve mixing efficiency, in the present embodiment, see also Fig. 1, the interior storehouse cylindrical shell that is surrounded by outer storehouse is separated to form a plurality of branches cylindrical shell in the bottom near center unloader 4, and the outward-dipping umbrella that is of these branch's cylindrical shells distributes, and then realizes that the material multiple spot mixes, and bigger blending space is provided, has avoided stopping up.Alternatively, the bed material is carried in the storehouse in adopting, when raw coal is deposited in outer storage, because in general raw coal is wetter, and the bed material is generally than materials such as the sand of doing, lime-ash, then the configuration design of interior storehouse cylindrical shell can be become the rugby shape that two is thin about in the of, interlude is thicker, adopt this structure to help preventing chute blockage, can not influence blanking again simultaneously.Further, blockage problem appears in the material that is transferred to coal machine 6 for fear of center unloader 4, connect and can on the discharge channel of feeder 6 a buffering awl 5 be set at center unloader 4, the material that draws off from center unloader 4 unloads after buffering awl 5 bufferings again and is filled to feeder 6.Utilize motor M3 to drive feeder 6 work at last, thus with required mass transport to boiler furnace 8.
The present invention is as follows to the course of work of CFBB convey materials:
The charging aperture of material by disintegrating machine 1 enters disintegrating machine by after the abundant fragmentation, by transmitting device, is sent to feed bin discharging port A, B1 and B2 automatically as belt feeder 2.When material is raw coal, motor M1 work makes discharging opening B1 and B2 be in open mode, closes discharging port A simultaneously, and the raw coal in this moment outer storehouse is bored 5 through center unloader 4 and buffering and unloaded and be filled to feeder 6, motor M3 drives feeder 6 work, and raw coal is supplied in the boiler furnace 8.When material is when material bed, motor M1 counter-rotating work makes discharging port A be in open mode, closes discharging opening B1 and B2 simultaneously, the bed material list solely can be given to boiler equally according to top step, thereby realized the feed by turns separately of raw coal and bed material.Supply with raw coal and when material bed at needs simultaneously to the boiler furnace chamber, then the bed material of carrying in the raw coal that stores in the outer storehouse and the interior storehouse is drawn off together, and drive scraper 7 rotations by motor M2, material is fully mixed after center unloader 4, buffering awl 5, feeder 6 are delivered to boiler.Therefore, adopt raw coal of the present invention, a bed material one Storage Silo can realize that not only a raw coal and a bed material list single wheel give material, also can realize both feeds simultaneously, thereby save construction cost greatly, reduced operation energy consumption, and then improved power plant's production efficiency.
Claims (7)
1. multi-functional coal charge storehouse that is applicable to CFBB, comprise: feed bin cylindrical shell (3), two above discharging opening (A, B1, B2), center unloader (4) and buffer unit (5), it is characterized in that: feed bin cylindrical shell (3) is made up of inside and outside two cylindrical shells, constitutes the Nei Cang and the Wai Cang of feed bin respectively; Discharging opening is positioned at the top of feed bin cylindrical shell (3), and is communicated with interior storehouse or outer storehouse respectively; Center unloader (4) is positioned at feed bin cylindrical shell (3) bottom, and the material that is supplied to is realized feed in boiler through center unloader (4), buffer unit (5) successively.
2. multi-functional coal charge according to claim 1 storehouse, it is characterized in that: adopt motor (M1) to control described discharging opening (A, B1, B2) opening and closing, and in fill process, (B1, open and-shut mode B2) is just in time opposite for the open and-shut mode of the discharging opening (A) that is communicated with interior storehouse and the discharging opening that is communicated with outer storehouse.
3. multi-functional coal charge according to claim 1 storehouse is characterized in that: described center unloader (4) also comprises scraper (7), utilizes motor (M2) to drive scraper (7) rotation, to realize even feeding.
4. multi-functional coal charge according to claim 1 storehouse is characterized in that: described buffer unit (5) is the buffering awl.
5. multi-functional coal charge according to claim 1 storehouse is characterized in that: interior storehouse cylindrical shell is separated to form a plurality of branches cylindrical shell in the bottom near center unloader (4), and the outward-dipping umbrella that is of described branch cylindrical shell distributes.
6. multi-functional coal charge according to claim 1 storehouse is characterized in that: interior storehouse cylindrical shell becomes the rugby shape that two is thin about in the of, interlude is thicker.
7. circulating fluidized bed boiler systems, comprise each described multi-functional coal charge storehouse as claim 1-6, also comprise and be used for the disintegrating machine (1) of comminuting matter, transmitting device of material (2) and feeder (6), wherein the material that draws off through described multi-functional coal charge storehouse unloads and is filled to feeder (6), and feeder (6) raw coal and/or bed material the most at last is supplied in the boiler furnace (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110100385 CN102128448A (en) | 2011-04-21 | 2011-04-21 | Multifunctional coal bunker suitable for circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110100385 CN102128448A (en) | 2011-04-21 | 2011-04-21 | Multifunctional coal bunker suitable for circulating fluidized bed boiler |
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| CN102128448A true CN102128448A (en) | 2011-07-20 |
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| CN 201110100385 Pending CN102128448A (en) | 2011-04-21 | 2011-04-21 | Multifunctional coal bunker suitable for circulating fluidized bed boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132336A (en) * | 2014-08-08 | 2014-11-05 | 中国电力工程顾问集团西南电力设计院 | CFB (circulating fluidized bed) boiler starting bed material mechanical transport system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4275668A (en) * | 1980-08-28 | 1981-06-30 | Foster Wheeler Energy Corporation | Coal feed system for a fluidized bed combustor |
| JPH10110937A (en) * | 1996-10-07 | 1998-04-28 | Mitsubishi Heavy Ind Ltd | Powder particle distributor of coal gasification furnace |
| CN2544192Y (en) * | 2002-06-11 | 2003-04-09 | 曾庆智 | Chain grate for chain furnace |
| CN1900592A (en) * | 2005-07-23 | 2007-01-24 | 王歆 | Air force seal blowing rotary feeder |
| CN101813312A (en) * | 2010-05-05 | 2010-08-25 | 烟台众力电力节能有限公司 | Device for desulphurization in circulating fluidized bed boiler |
-
2011
- 2011-04-21 CN CN 201110100385 patent/CN102128448A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4275668A (en) * | 1980-08-28 | 1981-06-30 | Foster Wheeler Energy Corporation | Coal feed system for a fluidized bed combustor |
| JPH10110937A (en) * | 1996-10-07 | 1998-04-28 | Mitsubishi Heavy Ind Ltd | Powder particle distributor of coal gasification furnace |
| CN2544192Y (en) * | 2002-06-11 | 2003-04-09 | 曾庆智 | Chain grate for chain furnace |
| CN1900592A (en) * | 2005-07-23 | 2007-01-24 | 王歆 | Air force seal blowing rotary feeder |
| CN101813312A (en) * | 2010-05-05 | 2010-08-25 | 烟台众力电力节能有限公司 | Device for desulphurization in circulating fluidized bed boiler |
Non-Patent Citations (1)
| Title |
|---|
| 《内蒙古电力技术》 20101231 金维勤 大型CFB锅炉填加启动床料方式的分析探讨 , 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132336A (en) * | 2014-08-08 | 2014-11-05 | 中国电力工程顾问集团西南电力设计院 | CFB (circulating fluidized bed) boiler starting bed material mechanical transport system |
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Application publication date: 20110720 |