CN104132336A - CFB (circulating fluidized bed) boiler starting bed material mechanical transport system - Google Patents
CFB (circulating fluidized bed) boiler starting bed material mechanical transport system Download PDFInfo
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- CN104132336A CN104132336A CN201410389463.1A CN201410389463A CN104132336A CN 104132336 A CN104132336 A CN 104132336A CN 201410389463 A CN201410389463 A CN 201410389463A CN 104132336 A CN104132336 A CN 104132336A
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Abstract
The invention provides a CFB (circulating fluidized bed) boiler starting bed material mechanical transport system. The CFB boiler starting bed material mechanical transport system comprises a coal plough, a starting bed material cabin, a starting bed material feeding machine, a first coal feeding machine and a second coal feeding machine which are sequentially arranged in a gradient lowering manner, wherein the coal plough is arranged on a belt conveyor above a feeding opening of the starting bed material cabin, and a discharging opening of the starting bed material cabin, the starting bed material feeding machine, the first coal feeding machine, the second coal feeding machine and a feeding opening of a CFB boiler hearth ash passage are sequentially communicated with one another. Compared with the traditional pneumatic transport system, no compressed gas needs to drive the transportation of the boiler starting bed material through a pure mechanical transport way, the influence from the type and particle size distribution of the starting bed material is small, the pipeline abrasion and blockage phenomena can be basically avoided, and the starting bed material can be rapidly, stably and continuously added. The CFB boiler starting bed material mechanical transport system has the advantages of reliability in system running, low implementation cost, high system output power, shorter transport time and the like.
Description
Technical field
The present invention relates to CFB boiler technology field, especially relate to a kind of CFB boiler startup bed material mechanical conveying system.
Background technology
CFB (English full name Circulating Fluidized-bed Boiler, CFBB) boiler because of its have that fuel tolerance is wide, efficiency of combustion is high, Load Regulation is large, can be in bed direct desulfurization and be easy to realize the many merits such as ash comprehensive utilization, in process steam, heat supply, cogeneration of heat and power, station boiler, be widely adopted.And for the Large CFB Boiler of 300MW and above grade, it is larger that it starts bed material amount, in order to meet the demand of boiler startup bed material amount, if adopt artificial conveyance mode, not only labour intensity is large, and cannot meet the feed supplement requirement in boiler unit running process.
Existing CFB boiler startup bed material mode of movement adopts pneumatic conveying mode more, adopts Compressed Gas to drive startup bed material to flow until enter CFB boiler furnace in predetermined startup bed material conveying tube road.The System Construction more complicated of this air-transport system, its construction investment and operating cost are all higher, and be subject to the impact of a startup kind of expecting and distribution of particles larger, serious wear to conveyance conduit in actual motion, also easily deposit the obstruction that causes conveyance conduit, the conveying output capacity of air-transport system is reduced, start the interpolation time lengthening of bed material, can not meet CFB boiler and must add fast, steadily and continuously the application demand that starts bed material.
Summary of the invention
The technical problem to be solved in the present invention is: the problem existing for prior art, a kind of CFB boiler startup bed material mechanical conveying system is provided, simple in structure and implementation cost is low, do not need strength to carry completely can to meet CFB boiler to starting bed material fast, steadily and a demand for continuous adding.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of CFB boiler startup bed material mechanical conveying system, comprise the coal plough, a startup bed feed bin, startup bed material batcher and the first feeder and the second feeder that are ladder-type and reduce successively setting, described coal plough is arranged on the ribbon conveyer that starts bed feed bin charging aperture top, between described startup bed feed bin discharge hole, a startup bed material batcher, the first feeder, the second feeder and CFB boiler furnace grey-way charging aperture, by pipeline, is connected and communicates successively.
Preferably, described startup bed material mechanical conveying system also comprises Weighing type batcher, and the charging aperture of described Weighing type batcher, discharging opening are connected and are communicated by pipeline with a startup bed feed bin discharge hole, startup bed material batcher charging aperture respectively.
Preferably, in the connecting pipe between described Weighing type batcher charging aperture and startup bed feed bin discharge hole, electronic coal gate is set.
Preferably, material blanking tube and the angle between horizontal plane between described startup bed feed bin and startup bed material batcher is greater than or equal to 60 degree.
Preferably, the discharging opening skew wall of described startup bed feed bin and the angle between horizontal plane are greater than or equal to 60 degree.
Preferably, described startup bed material batcher and material blanking tube and the angle between horizontal plane between the first feeder are greater than or equal to 60 degree.
Preferably, described the first feeder, the second feeder arrange respectively quadruplet, and between the first adjacent feeder and the second feeder, by pipeline, be connected and communicated, a described startup bed material batcher arranges four discharging openings, is connected and is communicated respectively with the first feeder charging aperture by pipeline.
Compared with prior art, the invention has the beneficial effects as follows: owing to having adopted ladder-type to reduce successively the coal plough of setting, start bed feed bin, start bed material batcher and the first feeder and the second feeder, by coal plough, the startup bed material on ribbon conveyer is cut to cause and start bed feed bin, then start bed material and by connecting pipe, be admitted to CFB boiler furnace grey-way charging aperture under the effect of self gravitation, compare with traditional air-transport system, this pure mechanical mode of movement takes full advantage of the ready-made facility of CFB boiler, pipeline, without any need for Compressed Gas, drive the conveying of boiler startup bed material completely, therefore, the present invention is subject to start the kind of bed material and the impact of distribution of particles is all smaller, there is no pipe wear and easy clogging, can guarantee completely induction system exert oneself and system is exerted oneself greatly, be conducive to save time of delivery, thereby can realize fast, steadily and continuously add and start bed material, and the operating ratio strength of this pure mechanical conveying system is carried more reliable, its implementation cost, normal operation and maintenance expense is all lower.
Accompanying drawing explanation
Fig. 1 is the structural map of a kind of CFB boiler startup of the present invention bed material mechanical conveying system.
Mark in figure: 1-coal plough, the electronic coal gate of 2-, 3-motor, 4-Weighing type batcher, 5-starts bed material batcher, 6-the first feeder, 7-the second feeder, the pneumatic coal gate of 8-.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of CFB boiler startup bed material mechanical conveying system as shown in Figure 1, between the first ready-made feeder 6 of CFB boiler and ribbon conveyer, be provided with coal plough 1, start bed feed bin, start bed material batcher 5, and described coal plough 1, start bed feed bin, starting bed material batcher 5 and the first feeder 6 and the second feeder 7 is ladder-type and reduces successively setting, coal plough 1 is wherein arranged on the ribbon conveyer that starts bed feed bin charging aperture top, described startup bed feed bin discharge hole, start bed material batcher 5, the first feeder 6, between the second feeder 7 and CFB boiler furnace grey-way charging aperture, by pipeline, connect and communicate successively, wherein, described the first feeder 6 adopts weighing coal feeder, described the second feeder 7 adopts chain type feeder.In the connecting pipe starting on bed feed bin discharge hole pipeline and between startup bed material batcher 5 discharging openings and the first feeder 6 charging apertures, be respectively arranged with an electronic coal gate 2, simultaneously, in the connecting pipe between the second feeder 7 discharging openings and CFB boiler furnace grey-way charging aperture, pneumatic coal gate 8 is set, by controlling the switching of pneumatic coal gate 8, can makes the startup bed material on the second feeder 7 promptly fall into CFB boiler furnace grey-way charging aperture.In order to facilitate dismounting, the maintenance of conveyance conduit, all conveyance conduits all adopt flange pattern to come connecting pipe to connect.When carrying startup bed material, it is temporary that startup bed material on ribbon conveyer is caused startup bed feed bin by 1 section of coal plough, open after the electronic coal gate 2 starting on bed feed bin discharge hole pipeline, the startup bed material that is arranged in startup bed feed bin can enter into and start a bed material batcher 5 along conveyance conduit under self gravitation effect, described startup bed material batcher 5 can adopt rotary batcher, also can adopt Weighing type batcher, or scraper feeder is buried in employing, whether the batcher of specifically selecting which kind of pattern is according to engineering arrangement condition and need accurate-metering to determine, generally speaking, while needing metering to start the conveying capacity of bed material, can select Weighing type batcher or rotary batcher.After opening the electronic coal gate 2 in the connecting pipe starting between bed material batcher 5 discharging openings and the first feeder 6 charging apertures, from starting bed material batcher 5 discharging openings startup bed material out, can drop into the first feeder 6 along conveyance conduit, by the first feeder 6, startup bed material is transported to the second feeder 7 along connecting pipe, open the pneumatic coal gate 8 in the connecting pipe between the second feeder 7 discharging openings and CFB boiler furnace grey-way charging aperture, startup bed material on the second feeder 7 can be smoothly through CFB boiler furnace grey-way charging aperture and enter into CFB boiler furnace, thereby complete the whole mechanical course of conveying that starts bed material.
Consider the kind of the startup bed material that mechanical conveying system of the present invention is carried and the difference of distribution of particles, in order to prevent starting bed feed bin and flow to pipe material system blockage phenomenon, preferably the blanking pipeline that starts bed feed bin and start between bed material batcher 5, startup bed material batcher 5 and the first feeder 6 is arranged vertically as far as possible; In the time of can not being arranged vertically if be subject to spatial limitation, also need discharging opening skew wall in high-order startup bed feed bin and the angle between horizontal plane be set to and be less than 60 degree, to start bed feed bin and start material blanking tube between a material batcher 5 and the angle between horizontal plane and also must not be set to and be less than 60 degree, meanwhile, by starting material blanking tube between bed material batcher 5 and the first feeder 6 and the angle between horizontal plane, also must not be set to and be less than 60 degree.Owing to starting bed material, in course of conveying, be mainly to utilize difference in height and rely on self gravitation to carry along conveyance conduit, therefore, adopt said structure can make full use of the self gravitation that starts bed material, guarantee to start a whereabouts of material smoothly, rapidly, thereby can effectively shorten a time of delivery that starts bed material, and be conducive to the raising that the integral body of induction system is exerted oneself.
In order to carry out Weighing to starting the startup bed material of bed feed bin supply, the startup that guarantees CFB boiler operates steadily, reliably, can and start between bed material batcher 5 at startup bed feed bin and increase Weighing type batcher 4 is set, the charging aperture of described Weighing type batcher 4, discharging opening are connected and are communicated by pipeline with a startup bed feed bin discharge hole, startup bed material batcher 5 charging apertures respectively, in the connecting pipe between Weighing type batcher 4 charging apertures and startup bed feed bin discharge hole, be provided with an electronic coal gate 2, all the other structures are same as above.
The bed that starts of the present invention expects that mechanical conveying system is applicable to a Large CFB Boiler startup bed material system for 150MW and above power, and unit number of units is not limit.In order to guarantee to start the conveying capacity of bed material, as shown in Figure 1, the first described feeder 6, the second feeder 7 arranges respectively quadruplet, and by pipeline, be connected and communicate between the first adjacent feeder 6 and the second feeder 7, described startup bed material batcher 5 arranges four discharging openings, be connected and communicate by pipeline with the first feeder 6 charging apertures respectively, in the connecting pipe starting between bed material batcher 5 and each first feeder 6 charging aperture, an electronic coal gate 2 is set respectively, so just can be so that this startup bed material mechanical conveying system forms a multistage independently induction system, greatly having improved conveying capacity and the system of induction system exerts oneself, avoid the concentrated clogging of pipeline.
Above-mentioned Weighing type batcher 4, a startup bed material batcher 5, the first feeder 6 and the second feeder 7 are all by independently motor 3 drivings, these motor 3 and electronic coal gate 2 can also carry out centralized Control by the control system of CFB boiler, thereby an automation that realizes the conveying of startup bed material is controlled, and is conducive to save energy and reduce the cost further.CFB boiler startup bed material adopts mechanical conveying system of the present invention, take full advantage of existing equipment and the pipe-line system of CFB boiler, only need to increase a small amount of equipment and can form one-level or multi-stage conveying system, compare with conventional air-transport system, the system of mechanical conveying system of the present invention is exerted oneself larger, can effectively shorten the interpolation, the time of delivery that start bed material, and, exerting oneself of induction system of this startup bed material can be exerted oneself and be consistent with feeder, can reach 200t/h.In addition, this pure mechanical mode of movement drives the conveying of boiler startup bed material completely without any need for Compressed Gas, starting bed material is carried by mechanical system completely, therefore it is all smaller to be subject to start a kind of material and the impact of distribution of particles, substantially there is not wearing and tearing and the blockage problem of pipeline, system operates steadily, reliably, maintenance workload is little, implementation cost, operation and maintenance expense are also all relatively low.
The foregoing is only preferred embodiment of the present invention and oneself, not in order to limit the present invention, it should be pointed out that all any modifications of doing within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a CFB boiler startup bed material mechanical conveying system, it is characterized in that: comprise the coal plough (1), a startup bed feed bin, startup bed material batcher (5) and the first feeder (6) and the second feeder (7) that are ladder-type and reduce successively setting, described coal plough (1) is arranged on the ribbon conveyer that starts bed feed bin charging aperture top, between described startup bed feed bin discharge hole, a startup bed material batcher (5), the first feeder (6), the second feeder (7) and CFB boiler furnace grey-way charging aperture, by pipeline, is connected and communicates successively.
2. a kind of CFB boiler startup bed material mechanical conveying system according to claim 1, it is characterized in that: also comprise Weighing type batcher (4), the charging aperture of described Weighing type batcher (4), discharging opening are connected and are communicated by pipeline with a startup bed feed bin discharge hole, startup bed material batcher (5) charging aperture respectively.
3. a kind of CFB boiler startup bed material mechanical conveying system according to claim 2, is characterized in that: in the connecting pipe between described Weighing type batcher (4) charging aperture and startup bed feed bin discharge hole, electronic coal gate (2) is set.
4. a kind of CFB boiler startup bed material mechanical conveying system according to claim 1, is characterized in that: described startup bed feed bin and the material blanking tube and the angle between horizontal plane that start between bed material batcher (5) are greater than or equal to 60 degree.
5. according to a kind of CFB boiler startup bed material mechanical conveying system described in claim 1-4 any one, it is characterized in that: the discharging opening skew wall of described startup bed feed bin and the angle between horizontal plane are greater than or equal to 60 degree.
6. according to a kind of CFB boiler startup bed material mechanical conveying system described in claim 1-4 any one, it is characterized in that: described startup bed material batcher (5) and material blanking tube and the angle between horizontal plane between the first feeder (6) are greater than or equal to 60 degree.
7. according to a kind of CFB boiler startup bed material mechanical conveying system described in claim 1-4 any one, it is characterized in that: described the first feeder (6), the second feeder (7) arrange respectively quadruplet, and by pipeline, be connected and communicate between adjacent the first feeder (6) and the second feeder (7), described startup bed material batcher (5) arranges four discharging openings, is connected and is communicated respectively with the first feeder (6) charging aperture by pipeline.
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| CN201410389463.1A CN104132336A (en) | 2014-08-08 | 2014-08-08 | CFB (circulating fluidized bed) boiler starting bed material mechanical transport system |
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| CN201410389463.1A CN104132336A (en) | 2014-08-08 | 2014-08-08 | CFB (circulating fluidized bed) boiler starting bed material mechanical transport system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107854966A (en) * | 2017-11-20 | 2018-03-30 | 深圳东方锅炉控制有限公司 | A kind of method and system for improving high basic metal coal and staiing coking |
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Address after: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Address before: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation |
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Free format text: CORRECT: APPLICANT; FROM: SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION TO: CHINA POWER ENGINEERING CONSULTING GROUP SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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Application publication date: 20141105 |
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