CN104949116B - Fall slag device and CFBB - Google Patents
Fall slag device and CFBB Download PDFInfo
- Publication number
- CN104949116B CN104949116B CN201510382108.6A CN201510382108A CN104949116B CN 104949116 B CN104949116 B CN 104949116B CN 201510382108 A CN201510382108 A CN 201510382108A CN 104949116 B CN104949116 B CN 104949116B
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- China
- Prior art keywords
- slag
- air inducing
- gas
- transport tube
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002893 slag Substances 0.000 title claims abstract description 104
- 230000001939 inductive effect Effects 0.000 claims abstract description 61
- 239000007787 solid Substances 0.000 claims description 34
- 239000007789 gas Substances 0.000 abstract description 20
- 239000010882 bottom ash Substances 0.000 abstract description 19
- 238000005243 fluidization Methods 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000010884 boiler slag Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
Fall slag device and CFBB the invention discloses one kind, it is described fall slag device include scum pipe (1), transport tube (2) and slag feed pipe (3), the upper port of the scum pipe (1) is connected with the slag-drip opening of boiler and the lower port of the scum pipe (1) is connected with the upper port of the transport tube (2), the upper port of the slag feed pipe (3) is connected with the lower port of the transport tube (2) and the lower port of the slag feed pipe (3) is connected with the slag inlet of slag cooler, wherein, it is described fall slag device also include connect with the transport tube (2) and can the transport tube (2) top formation low-pressure area air inducing component.Low-pressure area is formed in the top of transport tube by air inducing component, the gas flow of slag cooler is carried along into when reducing the descending flowing of bottom ash, it is to avoid stream slag phenomenon is produced due to lubrication, the fluidization of these gases.Meanwhile, the gas into low-pressure area is single-phase flow in air inducing component, and air quantity, wind speed are easily controlled.
Description
Technical field
The present invention relates to boiler slag removal field, in particular it relates to which one kind falls slag device and CFBB.
Background technology
China's inferior fuel rich reserves, and CFBB is wide for coal adaptability, passes through recirculating fluidized bed
Boiler combustion technology can realize inexpensive, the efficient utilization of inferior fuel.The common feature of inferior fuel be calorific value it is low,
Content of ashes is high, and therefore, the flying dust flow for using the CFBB of these fuel is very big, and bottom ash flow is also very big.
In order to control bed to press and thickness of bed layer, scoriae is prevented, ensures good fluidization conditions, stably burns, avoids lime-ash knot
Jiao, these bottom ash must drain in good time.On the other hand, heat transfer in circulating fluid bed boiler, mass transfer, burn all very big
Dependent on Matter Transfer in stove in degree, it therefore, in stove must assure that and possess sufficient amount of material to construct Matter Transfer, institute
With the discharge capacity of bottom ash nor being the bigger the better, thus realize that controllable slag emission becomes extremely important.
As shown in figure 1, falling used in CFBB domestic at present, slag device is main by scum pipe, transport tube and to be entered
Slag pipe is constituted.In actual motion, slag cooler is according to roller slag cooler (the slag cooler form of existing main flow), then ash-retention efficiency is by rolling
Cylinder transport decision of exerting oneself, flow rate of the clinker in slag device is fallen then is controlled automatically by clinker in the accumulation in slag feed pipe exit
System.However, the popularization and development of the sunken bed storage low energy consumption running technology with CFBB, CFBB
Interior bed material quality becomes higher, becomes thinner to coal particle size, and the granularity of bottom ash is also corresponding thinner, so that fine grain particle
Portion becomes much larger in bottom ash.Under such a background, due to bottom ash by burner hearth through fall slag device it is descending during meeting
Portion gas is carried with descending along with them, slag cooler is eventually entered into.This portion gas can be to the defeated of particle in slag cooler
Fortune plays fluidisation, lubrication, so that particle can not form effective accumulation in slag cooler import, it is in slag cooler
The fin control of flowing also no longer in roller, so roller will lose control to deslagging, this is stream slag phenomenon.When cold slag
When stream slag phenomenon occurs in device, bottom ash flow rate will be out of hand, and material enters slag cooler in a short time in a large amount of stoves, destroys cold
Slag, slag-draining device, and decline material reduction, bed temperature in stove, blowing out may be caused when serious.
The method of current controlling stream slag is often to turn down slag device portal aperture, for example, carried out by the valve 8 in Fig. 1
Aperture is adjusted, but such a method often brings stifled slag problem, and deslagging is easy to because pipeline aperture is too small and interrupts.Stifled slag hair
Generally it is required for recovering deslagging by manually disclosing slag after life, this will bring high cost of labor, so such a way is not
It is the Perfected process for solving the problems, such as slag cooler stream slag.
In view of the disadvantages mentioned above of prior art, it is desirable to provide a kind of new to fall slag device.
The content of the invention
It is an object of the invention to provide it is a kind of can effectively solve the problem that slag cooler stream slag problem fall slag device.
To achieve these goals, the present invention provide one kind fall slag device, this fall slag device including scum pipe, transport tube and
Slag feed pipe, the upper port of the scum pipe is connected and the lower port of the scum pipe and the transport tube with the slag-drip opening of boiler
Upper port connect, the upper port of the slag feed pipe connected with the lower port of the transport tube and the lower port of the slag feed pipe with it is cold
The slag inlet connection of slag device, it is characterised in that it is described fall slag device also include connecting with the transport tube and can be described defeated
The top for transporting pipe forms the air inducing component of low-pressure area.
Preferably, the scum pipe and slag feed pipe are obliquely installed, and the transport tube is vertically arranged.
Preferably, the air inducing component includes air-introduced machine and air inducing and bypassed, one end port of the air inducing bypass with it is described
Air-introduced machine is connected and the other end port of air inducing bypass is connected with the upper port of the transport tube.
Preferably, the air inducing bypass is vertically arranged.
Preferably, the air inducing component is also included by gas-solid separator, the entrance of the gas-solid separator and the air inducing
The upper port connection on road, the outlet of the gas-solid separator is connected by air inducing air channel with the air-introduced machine.
Preferably, the gas-solid separator is formed as chamber, and the cross sectional dimensions of the gas-solid separator is more than described draw
The cross sectional dimensions of wind bypass.
Preferably, the air inducing is bypassed and the gas-solid separator is cylindrical shape, and the internal diameter D of the gas-solid separator is big
The internal diameter d bypassed in the air inducing.
Preferably, the length of air inducing bypass is h, and h ＞ 2d.
Preferably, the height of the gas-solid separator is H, and H >=d.
In addition, the present invention also provides a kind of CFBB, it includes above-mentioned falling slag device.
Low-pressure area is formed in the top of transport tube by air inducing component in above-mentioned technical proposal, when reducing the descending flowing of bottom ash
It is carried along into the gas flow of slag cooler, it is to avoid stream slag phenomenon is produced due to lubrication, the fluidization of these gases.Meanwhile, enter
The gas for entering low-pressure area is single-phase flow in air inducing component, and air quantity, wind speed are easily controlled, and opening for slag device is fallen compared to regulation
Degree, the work of technical scheme is relatively reliable.In addition, technical scheme does not change the stream on original slag dropping tube road
Logical area, therefore do not influence the normal transport capability of slag device, so that stifled slag phenomenon will not be caused.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 be it is existing fall slag device schematic diagram；
Fig. 2 is the schematic diagram for falling slag device of the specific embodiment of the invention.
Wherein,
The transport tube of 1 scum pipe 2
Managed by the air inducing of 3 slag feed pipe 4
The air inducing air channel of 5 gas-solid separator 6
The valve of 7 air-introduced machine 8
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the description of the invention, it is necessary to illustrate, the orientation or position relationship of the instruction such as term "up" and "down" are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than indicate or dark
Specific orientation must be had, with specific azimuth configuration and operation by showing the device or element of meaning, therefore it is not intended that right
The limitation of the present invention.
The present invention provides one kind and falls slag device, and this, which falls slag device, includes scum pipe 1, transport tube 2 and slag feed pipe 3, scum pipe 1
Upper port connected with the slag-drip opening of boiler and the lower port of scum pipe 1 is connected with the upper port of transport tube 2, slag feed pipe 3 it is upper
Port is connected with the lower port of transport tube 2 and the lower port of slag feed pipe 3 is connected with the slag inlet of slag cooler, wherein, fall slag device
Also include connecting with transport tube 2 and the air inducing component of low-pressure area can be formed in the top of transport tube 2.By air inducing component defeated
The top for transporting pipe 2 forms low-pressure area, the gas flow of slag cooler is carried along into when reducing the descending flowing of bottom ash, it is to avoid due to these gas
Lubrication, the fluidization of body and produce stream slag phenomenon.Meanwhile, the gas into low-pressure area is single-phase flow in air inducing component,
Air quantity, wind speed are easily controlled, and compared to the aperture that regulation falls slag device, the work of technical scheme is relatively reliable.Separately
Outside, technical scheme does not change the circulation area on original slag dropping tube road, therefore does not influence the normal of slag device to transport energy
Power, so that stifled slag phenomenon will not be caused.
Specifically, scum pipe 1, transport tube 2 and slag feed pipe 3 are cylindric (certain square tube is also feasible), and such as Fig. 2
Shown, scum pipe 1 and slag feed pipe 3 are obliquely installed, and transport tube 2 is vertically arranged, so that the bottom discharged from the slag-drip opening of boiler
Slag can smoothly enter slag cooler and be cooled down.
Wherein, air inducing component includes air-introduced machine 7 and air inducing bypass 4, one end port of the air inducing bypass 4 and air-introduced machine 7
The other end port of connection and air inducing bypass 4 is connected with the upper port of transport tube 2, so as to form low pressure in the top of transport tube 2
Area, bottom ash gas entrained when descending in scum pipe 1 will enter air inducing bypass 4 in the presence of pressure difference, and bottom ash is existed
The descending gas flow being carried by transport tube 2 will be also greatly reduced.Then, bottom ash will enter slag cooler by slag feed pipe 3, by
In being only accompanied by a small amount of carrying gas, it is not enough in slag cooler form gravity flow.As a preferred embodiment, air inducing
Bypass 4 is vertically arranged, to form low-pressure area in the surface of transport tube 2, so as to reach more preferable air inducing and gas-solid separating effect.
Further, air inducing component also includes gas-solid separator 5, and the entrance of gas-solid separator 5 bypasses 4 upper end with air inducing
Mouth connection, the outlet of gas-solid separator 5 is connected by air inducing air channel 6 with air-introduced machine 7.Wherein, gas-solid separator 5 is formed as chamber
Room, it is simple in construction, it is with low cost, and the cross sectional dimensions of gas-solid separator 5 is more than the cross sectional dimensions that air inducing bypasses 4, herein
Cross section refer specifically to the section vertical with gas flow direction.Part fine grained in bottom ash may be carried along into by air inducing
Air inducing bypass 4, subsequently into gas-solid separator 5.In gas-solid separator 5, gas flow rate is reduced rapidly, and gas is taken to particle
Band ability is decreased, and fine grained will be and again descending in the form of cluster of grains in this area deposition, convergence, return to transport tube
2, and eventually enter into slag cooler.Air inducing accelerates after gas-solid separator 5, eventually enters into air-introduced machine again in air inducing air channel 6
7.By the decelerating effect of gas-solid separator 5, reduction air inducing prevents fine grained from blocking air inducing air channel 6 carrying capacity of particle
Or air-introduced machine 7 is damaged, also avoid causing fine slag to be lost in.
Wherein, as preferred embodiment, air inducing bypass 4 and gas-solid separator 5 are cylindrical shape, gas-solid separator 5
Internal diameter D be more than air inducing bypass 4 internal diameter d, to make air inducing to access effective deceleration in gas-solid separator 5, and drop
Low gas prevents particle from entering air inducing air channel 6 carrying capacity of particle.Also, air inducing bypasses 4 length for h, and h ＞ 2d,
To ensure that gas-solid separator 5 there are enough installing spaces, do not occur space interference with scum pipe 1.The height of gas-solid separator 5 is
H, and H >=d, so that air inducing has enough distance to complete sufficiently to slow down the process that further accelerates, when also allowing for particle and having enough
Between stop, assemble herein with space, it is then descending.
Fall slag device relative to the tradition shown in Fig. 1, the present invention without change it is original fall slag device circulation area, i.e.,
Under the precondition for not changing bottom ash transport capability, effectively reduce bottom ash using air inducing bypass 4 and be carried along into slag cooler
Gas flow, effectively prevent bottom ash in slag cooler and flow automatically the generation of phenomenon；Meanwhile, being capable of preventing portion by gas-solid separator 5
The bottom ash of point fine grain is lost in because of the rolling action of air inducing, and enters the gas of low-pressure area, after gas-solid separator,
It is single-phase flow in air inducing component, air quantity, wind speed are easily controlled.
The present invention also provides a kind of CFBB, it include it is above-mentioned fall slag device, entered with the bottom ash to boiler
The effective processing of row.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (8)
1. fall slag device, it is described fall slag device include scum pipe (1), transport tube (2) and slag feed pipe (3), the scum pipe (1)
Upper port is connected with the slag-drip opening of boiler and the lower port of the scum pipe (1) is connected with the upper port of the transport tube (2), institute
State slag feed pipe (3) upper port connected with the lower port of the transport tube (2) and the slag feed pipe (3) lower port and slag cooler
Slag inlet connection, it is characterised in that it is described fall slag device also include connect and can be transported described with the transport tube (2)
The top for managing (2) forms the air inducing component of low-pressure area, and the scum pipe (1) and slag feed pipe (3) are obliquely installed, the transport tube
(2) it is vertically arranged, the air inducing component includes air-introduced machine (7) and air inducing bypass (4), one end port of the air inducing bypass (4)
It is connected with the air-introduced machine (7) and the other end port of air inducing bypass (4) is connected with the upper port of the transport tube (2).
2. it is according to claim 1 fall slag device, it is characterised in that air inducing bypass (4) is vertically arranged.
3. it is according to claim 2 fall slag device, it is characterised in that the air inducing component also include gas-solid separator (5),
The upper port that the entrance of the gas-solid separator (5) bypasses (4) with the air inducing is connected, the outlet of the gas-solid separator (5)
It is connected by air inducing air channel (6) with the air-introduced machine (7).
4. it is according to claim 3 fall slag device, it is characterised in that the gas-solid separator (5) is formed as chamber, described
The cross sectional dimensions of gas-solid separator (5) is more than the cross sectional dimensions that the air inducing bypasses (4).
5. it is according to claim 4 fall slag device, it is characterised in that air inducing bypass (4) and the gas-solid separator
(5) it is cylindrical shape, the internal diameter D of the gas-solid separator (5) is more than the internal diameter d that the air inducing bypasses (4).
6. it is according to claim 5 fall slag device, it is characterised in that the length of air inducing bypass (4) is h, and h ＞
2d。
7. it is according to claim 5 fall slag device, it is characterised in that the height of the gas-solid separator (5) is H, and H >=
d。
8. CFBB, it is characterised in that the CFBB is included any one of claim 1-7
Fall slag device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510382108.6A CN104949116B (en) | 2015-07-02 | 2015-07-02 | Fall slag device and CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510382108.6A CN104949116B (en) | 2015-07-02 | 2015-07-02 | Fall slag device and CFBB |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104949116A CN104949116A (en) | 2015-09-30 |
| CN104949116B true CN104949116B (en) | 2017-09-15 |
Family
ID=54163997
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510382108.6A Active CN104949116B (en) | 2015-07-02 | 2015-07-02 | Fall slag device and CFBB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104949116B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6586359B2 (en) * | 2015-12-07 | 2019-10-02 | 川崎重工業株式会社 | Ash discharge system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331398A (en) * | 2000-07-04 | 2002-01-16 | 浙江大学 | Slags cooler with dual functions of cooling and separating fine ash |
| CN202792002U (en) * | 2012-08-23 | 2013-03-13 | 华北电力科学研究院有限责任公司 | Leak prevention device for sleeve type expansion joint |
| CN204786371U (en) * | 2015-07-02 | 2015-11-18 | 中国神华能源股份有限公司 | Sediment device and circulating fluidized bed boiler fall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257718A (en) * | 1993-03-05 | 1994-09-16 | Babcock Hitachi Kk | Fluidized bed type boiler and method for removing medium out of it |
-
2015
- 2015-07-02 CN CN201510382108.6A patent/CN104949116B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331398A (en) * | 2000-07-04 | 2002-01-16 | 浙江大学 | Slags cooler with dual functions of cooling and separating fine ash |
| CN202792002U (en) * | 2012-08-23 | 2013-03-13 | 华北电力科学研究院有限责任公司 | Leak prevention device for sleeve type expansion joint |
| CN204786371U (en) * | 2015-07-02 | 2015-11-18 | 中国神华能源股份有限公司 | Sediment device and circulating fluidized bed boiler fall |
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| Publication number | Publication date |
|---|---|
| CN104949116A (en) | 2015-09-30 |
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