CN101749696B - Multipath circulating fluidized bed boiler - Google Patents
Multipath circulating fluidized bed boiler Download PDFInfo
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- CN101749696B CN101749696B CN2010101103524A CN201010110352A CN101749696B CN 101749696 B CN101749696 B CN 101749696B CN 2010101103524 A CN2010101103524 A CN 2010101103524A CN 201010110352 A CN201010110352 A CN 201010110352A CN 101749696 B CN101749696 B CN 101749696B
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Abstract
The invention discloses a multipath circulating fluidized bed boiler, which comprises a main combustion chamber, an auxiliary combustion chamber and an ash chamber which are parallel to the main combustion chamber, a tail flue, and a coal economizer and a centrifugal separator arranged in the tail flue; the bottom of the auxiliary combustion chamber is inclined to the ash chamber and the inclination angle alpha is between 30 and 60 degrees; the bottom of the ash chamber is inclined to the auxiliary combustion chamber and the inclination angle beta is between 45 and 75 degrees; a material falling passage is reserved between the bottom surface of the ash chamber and the bottom surface of the auxiliary combustion chamber; an asymmetrical inertia separation circulating device is formed by the bottom surfaces of the mutually inclined auxiliary combustion chamber, an inclined plate I and an inclined plate II fixed on the two sides, and the material falling passage; a flow area of the bottom of the ash chamber A2 is no more than half of a flow area A1 of the bottom of the auxiliary combustion chamber; and the bottom surface of the ash chamber is provided with a loose blast cap. The multipath circulating fluidized bed boiler can ensure the smooth conveying of materials and the required material separating amount, prevent the materials from accumulating on the bottom of the combustion chambers for a long time, and ensure smooth circulating, so that a combustion device normally operates for a long term.
Description
Technical field
The present invention relates to a kind of multipath circulating fluidized bed boiler, relate in particular to a kind of miniaturization CFBC equipment, belong to the combustion apparatus of colm, solid waste, city and inferior fuels such as industrial sludge or living beings.
Background technology
At present the main combustion apparatus of inferior fuels such as domestic colm, solid waste, city and the industrial sludge of China, living beings is chain furnace and CFBB, the different type of furnaces has different separately requirements to its burnt fuel, and pluses and minuses are separately also arranged.
Circulating fluidized bed technique is the combustion technology of high-efficiency cleaning, and fuel tolerance is wide, fuel such as burning fat coal, colm, solid waste, living beings.Its efficiency of combustion height can carry out desulfuration in furnace, denitration etc. simultaneously and pollute control operation, has low NO
xAnd SO
xAdvantages such as discharging.But shortcomings such as tradition is upright, there is the shaft height in the single cycle fluidized-bed combustion boiler, and boiler island is bulky, thereby workshop building had relatively high expectations.The steel of the supporting steel frame of boiler island and boiler island body consumption is bigger simultaneously, makes that Project Cost and initial cost are higher.Traditional vertical, single cycle fluidized-bed combustion boiler are to rely on the fluidization circulation of bed material and fuel to reach the abundant mixing and the burning of material, therefore must guarantee certain solid circulating rate, so the having little significance of its miniaturization.For chain furnace, it is had relatively high expectations to institute's burnt fuel, and generally requiring its burnt fuel is high-grade fuel, and relatively more responsive to fuel reaction, fuel tolerance is not strong.
The inventor is unsuitable for the characteristics of miniaturization at traditional recirculating fluidized bed, propose the horizontal small Combustion technology of circulating fluidized of two-stage circulation, formed " a kind of horizontal CFBC equipment and circulating combustion method thereof " (ZL 2,005 10126362.6) patent of invention.On this basis, at follow-up research and development and application, related invention people has proposed a series of and this horizontal Combustion technology of circulating fluidized and device-dependent parts or equipment in succession, has formed " a kind of throughflow type material returning device of self-balancing " (ZL 2,007 1 0120876.X), " a kind of multistage feed separation and loop back device that is used for horizontal circulation fluidized bed " (ZL 2,007 20172831.2) and " a kind of horizontal recirculating fluidized bed hot-water boiler " a plurality of patents such as (ZL 2,007 2 0190923.3).
Yet in the technology and equipment application process, the design of above-mentioned associated components or equipment still remains improved place, especially aspect the structure and formed material separation device thereof of subsidiary combustion chamber, form solid accumulation in the one-level feed separation cyclic process herein easily, be difficult to realize better feed separation effect.
Summary of the invention
The objective of the invention is to optimize above-mentioned small-sized CFBC equipment, improve its correlated performance, it is more stable that it is in use moved.
The present invention is achieved through the following technical solutions:
A kind of multipath circulating fluidized bed boiler, subsidiary combustion chamber and burning chamber, the back-end ductwork that comprises main combustion chamber, is arranged in juxtaposition with main combustion chamber, place economizer and whizzer in the back-end ductwork, described whizzer is arranged on the outlet of burning chamber, it is characterized in that: be separated by with membrane wall between described main combustion chamber and the subsidiary combustion chamber, top is the gas material passage; Be separated by with membrane wall between subsidiary combustion chamber and the burning chamber, the gas material passage is left in the bottom; The bottom surface of described subsidiary combustion chamber tilts to burning chamber's direction, the bottom surface of described burning chamber tilts to the subsidiary combustion chamber direction, leave blanking channel between the bottom surface of burning chamber and the bottom surface of subsidiary combustion chamber, subsidiary combustion chamber bottom surface and burning chamber bottom surface, the swash plate I that is fixed on both sides and swash plate II and the blanking channel that tilts forms asymmetrical inertial separation EGR mutually.
In the technique scheme, the tilt angle alpha of the bottom surface of described subsidiary combustion chamber is 30 °～60 °, and the inclination angle beta of the bottom surface of burning chamber is 45 °～75 °, and the width δ of blanking channel is 200～400mm.The bottom flow area A of described burning chamber
2Smaller or equal to subsidiary combustion chamber bottom flow area A
11/2.The bottom surface of described burning chamber is provided with loosening blast cap, and loosening blast cap adopts wind cap; Loosening blast cap links to each other with loosening airduct.
In the technique scheme, described inertial separation EGR is provided with two along the subsidiary combustion chamber depth direction; Described whizzer is two.
The present invention compared with prior art has the following advantages and beneficial effect: this device burning chamber bottom flow area can guarantee the smooth delivery of power of material less than half of subsidiary combustion chamber bottom flow area, can guarantee required feed separation amount again; The setting of asymmetric inertia separator and on loosening wind arrange, can avoid the long-term accumulation of the material that separates, thereby form one-level feed separation and circulation smoothly in the bottom, combustion chamber, guaranteed the long-term normal operation of burner.
Description of drawings
Fig. 1 is the schematic diagram of a kind of multipath circulating fluidized bed boiler provided by the present invention.
Fig. 2 is the B-B schematic top plan view (each 1 group of inertial separation EGR and whizzer) of Fig. 1 of a kind of multipath circulating fluidized bed boiler provided by the present invention.
Fig. 3 is the B-B schematic top plan view (each 2 groups of inertial separation EGR and whizzers) of Fig. 1 of a kind of multipath circulating fluidized bed boiler provided by the present invention.
Among the figure: the 1-main combustion chamber; The 2-subsidiary combustion chamber; 3-burning chamber; The 4-back-end ductwork; The 5-economizer; 6-inertial separation EGR; The 7-whizzer; 8-becomes flexible airduct; 9-becomes flexible blast cap; The 10-blanking channel; 11-swash plate I; 12-swash plate II.
The specific embodiment
Describe concrete structure of the present invention, operation principle and embodiment in detail below in conjunction with accompanying drawing:
A kind of multipath circulating fluidized bed boiler comprises main combustion chamber 1, subsidiary combustion chamber 2, burning chamber 3, back-end ductwork (4), economizer, one-level feed separation and EGR, secondary feed separation and EGR etc.Subsidiary combustion chamber 2 and burning chamber 3 are arranged in juxtaposition with main combustion chamber 1, all are separated by with membrane wall between the combustion chamber.Gas and material channel are left in main combustion chamber 1 and subsidiary combustion chamber 2 tops, and gas and material channel are left in subsidiary combustion chamber 2 and burning chamber 3 bottoms.
One-level feed separation and EGR are asymmetrical inertial separation EGR.This asymmetric inertia separator is made up of the subsidiary combustion chamber bottom surface that tilts, the burning chamber bottom surface of inclination, swash plate and the material whereabouts passage that is fixed on side and the bottom surface, combustion chamber.When asymmetrical inertial separation EGR was one, swash plate was two, i.e. swash plate I 11 and swash plate II 12.When boiler capacity is big, along the boiler furnace depth direction, one-level feed separation and EGR can be provided with two groups, add two swash plates again at subsidiary combustion chamber 2 and burning chamber 3 bottoms, and subsidiary combustion chamber and burning chamber's bottom space are separated into two relatively independent asymmetrical inertia separators.
For guaranteeing the smooth delivery of power of material, can guarantee required feed separation amount again, the flow area A of described burning chamber 3 bottom gases and material channel
2Smaller or equal to subsidiary combustion chamber 2 bottom flow area A
11/2, promptly the membrane wall between subsidiary combustion chamber and burning chamber bottom end points to burning chamber's distance from bottom smaller or equal to membrane wall bottom end points to 1/2 of subsidiary combustion chamber distance from bottom.
Simultaneously, for the accumulation of the material that asymmetric inertia separator separated that prevents to form in burning chamber's one side from subsidiary combustion chamber and burning chamber bottom, and prevent because of piling up of the wearing and tearing of back mass transport to burning chamber's membrane wall, be provided with loosening wind system in the burning chamber bottom, form by loosening blast cap 9 of orientation and the loosening airduct 8 under it.The layout of loosening blast cap and loosening wind can form one-level feed separation and circulation smoothly with asymmetrical inertia separator, has guaranteed the long-term normal operation of burner.
The flue gas that comes out from burning chamber enters secondary feed separation and the EGR that links to each other with the burning chamber outlet.Secondary feed separation and EGR are made up of with the secondary feeding back device that is located at the whizzer bottom the whizzer of rectangle.The whizzer smoke inlet place of rectangle establishes deflector.When boiler capacity was big, for guaranteeing the separation and the circulating effect of material, secondary feed separation and EGR also can be provided with two.
After the secondary feed separation, flue gas enters economizer and utilizes with the heat that absorbs wherein, and the flue gas that is reduced to uniform temperature enters follow-up dust pelletizing system again and handles back up to standard discharging.
Claims (4)
1. multipath circulating fluidized bed boiler, subsidiary combustion chamber (2) and burning chamber (3), the back-end ductwork (4) that comprises main combustion chamber (1), is arranged in juxtaposition with main combustion chamber, place back-end ductwork interior economizer (5) and whizzer (7), described whizzer is arranged on the outlet of burning chamber, it is characterized in that: be separated by with membrane wall between described main combustion chamber (1) and the subsidiary combustion chamber (2), the top of main combustion chamber and subsidiary combustion chamber is the gas material passage; Be separated by with membrane wall between subsidiary combustion chamber (2) and the burning chamber (3), the gas material passage is left in the bottom of subsidiary combustion chamber and burning chamber; The bottom surface of described subsidiary combustion chamber (2) tilts to burning chamber (3) direction, and the bottom surface of described burning chamber (3) tilts to subsidiary combustion chamber (2) direction, leaves blanking channel (10) between the bottom surface of burning chamber and the bottom surface of subsidiary combustion chamber; Form asymmetrical inertial separation EGR (6) by the subsidiary combustion chamber bottom surface and the burning chamber bottom surface of mutual inclination, the swash plate I (11) and the swash plate II (12) that are fixed on the both sides of subsidiary combustion chamber bottom surface and burning chamber bottom surface with blanking channel; The bottom flow area A of described burning chamber (3)
2Be less than or equal to subsidiary combustion chamber (2) bottom flow area A
11/2; Described burning chamber (3) bottom surface is provided with loosening wind system, and this loosening wind system is made up of loosening blast cap (9) of orientation and loosening airduct (8).
2. a kind of multipath circulating fluidized bed boiler according to claim 1 is characterized in that: the tilt angle alpha of described subsidiary combustion chamber (2) bottom surface is 30 °～60 °; The inclination angle beta of described burning chamber (3) bottom surface is 45 °～75 °; The width δ of described blanking channel (10) is 200mm～400mm.
3. a kind of multipath circulating fluidized bed boiler according to claim 1 and 2 is characterized in that: intersect the extended line of described burning chamber (3) bottom surface and the bottom surface of subsidiary combustion chamber (2).
4. a kind of multipath circulating fluidized bed boiler according to claim 1 is characterized in that: described asymmetrical inertial separation EGR (6) is provided with two along the subsidiary combustion chamber depth direction; Described whizzer (7) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101103524A CN101749696B (en) | 2010-02-09 | 2010-02-09 | Multipath circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101103524A CN101749696B (en) | 2010-02-09 | 2010-02-09 | Multipath circulating fluidized bed boiler |
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| Publication Number | Publication Date |
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| CN101749696A CN101749696A (en) | 2010-06-23 |
| CN101749696B true CN101749696B (en) | 2011-07-20 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537943B (en) * | 2012-01-17 | 2014-04-02 | 清华大学 | Horizontal type circulating fluidized bed boiler with horizontal cyclone separator |
| CN102767834A (en) * | 2012-08-01 | 2012-11-07 | 广西高普工业设备有限公司 | Boiler for combusting sugar-molasses alcohol waste liquid |
| CN103836612B (en) * | 2014-02-28 | 2015-10-07 | 北京热华能源科技有限公司 | A kind of Horizontal type circulating fluid bed superheated steam boiler |
| CN104033884A (en) * | 2014-06-28 | 2014-09-10 | 湘潭锅炉有限责任公司 | Boiler capable of burning biomass and tobacco stems in particular |
| CN104197322A (en) * | 2014-09-25 | 2014-12-10 | 贵州迪鑫工业设备工程有限公司 | Tobacco stem fluidized bed boiler |
| CN105509039B (en) * | 2016-01-27 | 2018-01-12 | 北京热华能源科技有限公司 | The deashing mechanism of the one-level material return system of multipath circulating fluidized bed boiler |
| CN105570879B (en) * | 2016-01-31 | 2018-01-12 | 北京热华能源科技有限公司 | Multipath circulating fluidized bed boiler with one-level self-balancing material returning device |
| CN105953220B (en) * | 2016-05-10 | 2018-05-18 | 北京热华能源科技有限公司 | A kind of separator outlet flue and multipath circulating fluidized bed hot-water boiler |
| CN106195980B (en) * | 2016-08-24 | 2019-02-15 | 北京热华能源科技有限公司 | A kind of pendant superheater and its multipath circulating fluidized bed boiler of application |
| CN107388244B (en) * | 2017-07-17 | 2018-12-11 | 清华大学 | A kind of multipaths Horizontal CFB Boiler and its control method |
| CN107490005A (en) * | 2017-09-13 | 2017-12-19 | 北京热华能源科技有限公司 | A kind of CFBB |
| CN112178627A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Multi-flow circulating fluidized bed with labyrinth separator |
| CN112178629A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Tail shaft flue separation device and multi-process circulating fluidized bed |
| CN112178628A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Wedge-shaped channel type separating and returning device and multi-process circulating fluidized bed applying same |
| CN113531521A (en) * | 2021-08-25 | 2021-10-22 | 温州宏泽热电股份有限公司 | Combustion control system of circulating fluidized bed boiler |
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| JP2001226180A (en) * | 2000-02-16 | 2001-08-21 | New Otani Co Ltd | System for recycling kitchen effluent and method for the same |
| CN2527860Y (en) * | 2002-03-18 | 2002-12-25 | 何相助 | High, low mixed flow speed circulating fluidized bed boiler |
| WO2005037422A1 (en) * | 2003-10-21 | 2005-04-28 | Seppo Ruottu | Circulating bed reactor |
| CN2869588Y (en) * | 2006-02-16 | 2007-02-14 | 郑州锅炉有限责任公司 | Vertical after-heat boiler |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001226180A (en) * | 2000-02-16 | 2001-08-21 | New Otani Co Ltd | System for recycling kitchen effluent and method for the same |
| CN2527860Y (en) * | 2002-03-18 | 2002-12-25 | 何相助 | High, low mixed flow speed circulating fluidized bed boiler |
| WO2005037422A1 (en) * | 2003-10-21 | 2005-04-28 | Seppo Ruottu | Circulating bed reactor |
| CN2869588Y (en) * | 2006-02-16 | 2007-02-14 | 郑州锅炉有限责任公司 | Vertical after-heat boiler |
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| CN101749696A (en) | 2010-06-23 |
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Address after: 100084 Beijing 100084 mailbox 82 box Tsinghua University Patent Office Patentee after: TSINGHUA University Patentee after: Rehua Energy Co.,Ltd. Address before: 100084 Beijing 100084 mailbox 82 box Tsinghua University Patent Office Patentee before: TSINGHUA University Patentee before: Beijing Rehua Energy Co.,Ltd. Address after: 100084 Beijing 100084 mailbox 82 box Tsinghua University Patent Office Patentee after: TSINGHUA University Patentee after: Beijing Rehua Energy Co.,Ltd. Address before: 100084 Beijing 100084 mailbox 82 box Tsinghua University Patent Office Patentee before: TSINGHUA University Patentee before: BEIJING NOWVA ENERGY TECHNOLOGY Co.,Ltd. |
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