CN100417862C - Horizontal circulating fluidized bed burning equipment and its circulating burning method - Google Patents
Horizontal circulating fluidized bed burning equipment and its circulating burning method Download PDFInfo
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- CN100417862C CN100417862C CNB2005101263626A CN200510126362A CN100417862C CN 100417862 C CN100417862 C CN 100417862C CN B2005101263626 A CNB2005101263626 A CN B2005101263626A CN 200510126362 A CN200510126362 A CN 200510126362A CN 100417862 C CN100417862 C CN 100417862C
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Abstract
The present invention relates to a horizontal circulating fluid bed combustion device and a circulating combustion method thereof which belong to a combustion device and a combustion method thereof for inferior fuel such as inferior coal, solid waste, urban and industrial sludge or biomass, etc. The present invention is composed of a main combustion chamber, a multi-stage subsidiary combustion chamber, a gas and solid separator, etc.; the present invention uses a horizontal structure and has multi-stage reentry material circulation of two stages or more than two stages. The present invention changes the single-stage vertical circulation structure of the traditional circulating fluidized bed; the height of a boiler can be effectively reduced, the requirements to the building height of factory buildings are reduced, the miniaturization of the traditional circulating bed boiler is favorable, and the cost can be effectively reduced; in the combustion device, material forms the material circulation of two stages or more than two stages, and the combustion efficiency is high; the combustion device simultaneously has all the advantages of the circulating fluidized bed; the combustion device can combust fuel such as the inferior coal, the solid waste, the urban and industrial sludge, the biomass, etc., and the adaptability of the fuel is wide; the combustion device is a high efficiency combustion device with cleaning combustion, compact structure and long service.
Description
Technical field
The present invention relates to a kind of CFBC equipment and circulating combustion method thereof, relate in particular to the horizontal CFBC equipment of a kind of level, belong to the combustion apparatus and the combustion method thereof 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 combustion fuel, and generally requiring its burnt fuel is high-grade fuel, and relatively more responsive to fuel reaction, fuel tolerance is not strong.
Existing generation technology, electricity generation boiler develops towards maximization, high parameter direction, has obtained very big achievement.China is just developing the combustion apparatus of oneself processing colm, solid waste, city and inferior fuels such as industrial sludge, living beings present stage, the mode chain furnace combustion equipment and the CFBC equipment of comparative maturity in succession have been shaped, but all exist cost and initial cost all bigger, the shortcoming that boiler body is bulky.The development miniaturization, the requirement of burner that has simultaneously advantages such as the high and low disposal of pollutants of efficiency of combustion, fuel tolerance be wide again concurrently is more for urgent, and the present invention provides a kind of combustion apparatus and combustion method for this demand just.
Summary of the invention
The present invention be directed to the current combustion equipment enlarging, the present situation that cost is relatively more expensive, a kind of horizontal CFBC equipment and circulating combustion method thereof are provided, make it have miniaturization, have all advantages of CFBB simultaneously concurrently, can be widely used in various fuel, comprise in the burning of inferior fuel, have the combustion apparatus of higher efficiency of combustion and lower disposal of pollutants.
Technical scheme of the present invention is as follows:
A kind of horizontal CFBC equipment is characterized in that: two-stage subsidiary combustion chamber and gas-solid separator that this combustion apparatus contains main chamber and is arranged in juxtaposition with described main chamber; Described main chamber is provided with the fuel apparatus for feeding, and its underpart and bottom are respectively equipped with recycle stock inlet, secondary cycle material inlet and cloth wind system one time; Be provided with the flue gas material outlet that the subsidiary combustion chamber that is adjacent is connected on the top of main chamber; Furnace wall bottom between the two-stage subsidiary combustion chamber is provided with the flue gas material channel, is provided with exhanst gas outlet on subordinate subsidiary combustion chamber top, and described gas-solid separator is arranged on the smoke outlet of subordinate's subsidiary combustion chamber; Incline structure is adopted in two-stage subsidiary combustion chamber bottom up and down, and the furnace wall between the major and minor combustion chamber forms ash bucket; Ash bucket is connected with main chamber by a recycle stock inlet, and gas-solid separator dipleg and material returning device are connected with main chamber by the secondary cycle material inlet.Two-stage subsidiary combustion chamber of the present invention be arranged in described main chamber a side or with the main chamber symmetric arrangement.
The invention provides a kind of circulating combustion method of horizontal CFBC equipment, it is characterized in that: material enters the subsidiary combustion chamber that is adjacent in main chamber burning back with flue gas, pass through inertial separation, part thermal material directly returns main chamber by the ash bucket of incline structure from a recycle stock inlet, a part of in addition thermal material is turned back through the subsidiary combustion chamber of back with flue gas, finally separate by gas-solid separator, return main chamber by the gas-solid separator dipleg through the secondary cycle material inlet, form two-stage circulating combustion method.
The present invention compared with prior art has the following advantages and the high-lighting effect: 1. the present invention adopts the horizontal layout of level, can reduce the height of boiler greatly, saves the boiler steel consumption, thereby has reduced the boiler cost effectively.Simultaneously because after the boiler height reduction, the construction cost of boiler factory building can reduce significantly.After boiler height reduced, the good stability of boiler can make boiler and mill construction compact more, and also easy access is safeguarded.2. in the combustion apparatus that the present invention relates to, material forms the two-stage circulation, can increase a fuel and a time of contact of material, reaches fully and converges, and improves efficiency of combustion.3. the present invention is owing to changed the single-stage recirculating fluidized bed form of traditional vertical, its related combustion apparatus also has all advantages of recirculating fluidized bed concurrently except that above-mentioned advantage, be a kind of many fuel, the high-efficiency cleaning combustion apparatus of wide adaptability, and efficiency of combustion height, energy desulfuration in furnace, denitration have low NO
xAnd SO
xAdvantages such as discharging.
Description of drawings
Fig. 1 is the structural representation of horizontal CFBC equipment single-sided arrangement embodiment provided by the present invention.
Fig. 2 is the material circulation schematic diagram of horizontal CFBC equipment single-sided arrangement embodiment provided by the present invention.
Fig. 3 is structure and the material circulation schematic diagram of horizontal CFBC equipment symmetric arrangement embodiment provided by the present invention.
Fig. 4 is the floor map of horizontal CFBC equipment single-sided arrangement provided by the present invention.
Fig. 5 is the floor map of horizontal CFBC equipment symmetric arrangement provided by the present invention.
Among the figure: 1-fuel apparatus for feeding; The 2-main chamber; 3-flue gas material outlet; 4,5-subsidiary combustion chamber; 6-final stage subsidiary combustion chamber exhanst gas outlet; 7-cloth wind system; 8-secondary cycle material inlet; Recycle stock inlet of 9-; 10-flue gas material access way; 11-gas-solid separator dipleg and material returning device; The 12-gas-solid separator; The outlet of 13-gas-solid separator; 14-afterbody heat-exchange system
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention and the course of work are further described.
Fig. 1 is the structural representation of horizontal CFBC equipment single-sided arrangement provided by the present invention.This combustion apparatus adopts horizontal horizontal type structure, mainly comprises main chamber 2 and the subsidiary combustion chamber 4 and subsidiary combustion chamber 5 and the gas-solid separator 12 that are arranged in juxtaposition with described main chamber; Described gas-solid separator is arranged on the exhanst gas outlet 6 of subsidiary combustion chamber 5; Described main chamber is provided with fuel apparatus for feeding 1, and the bottom of main chamber and bottom are respectively equipped with recycle stock inlet 9, secondary cycle material inlet 8 and cloth wind system 7 one time; Be furnished with flue gas material outlet 3 at interval at main chamber and subsidiary combustion chamber top; The furnace wall bottom is provided with the flue gas material access way 10 that is interconnected between subsidiary combustion chamber 4 and 5; Subsidiary combustion chamber bottom ash bucket adopts incline structure.Main chamber and multistage subsidiary combustion chamber and gas-solid separator adopt and are arranged in juxtaposition form, and boiler height can greatly reduce.On the top of main chamber 2 flue gas material outlet 3 is arranged, the flue gas material in the main chamber enters the subsidiary combustion chamber 4 that is adjacent thus after the mixed combustion in main chamber, be separated by with furnace wall between the combustion chamber.Gas-solid separator is placed in the exhanst gas outlet 6 of subsidiary combustion chamber 5, and the back-end ductwork of combustion apparatus can be installed heating surfaces such as economizer, air preheater according to actual needs.
Fig. 2 is horizontal CFBC equipment single-sided arrangement material circulation schematic diagram provided by the present invention (this embodiment adopts two subsidiary combustion chamber, also can adopt the subsidiary combustion chamber more than three or three).Adopt the circulation of two stage materials, by fuel apparatus for feeding 1, cloth wind system 7, main chamber 2, flue gas material outlet 3, subsidiary combustion chamber 4,5, final stage subsidiary combustion chamber exhanst gas outlet 6, secondary cycle material inlet 8, recycle stock inlet 9, flue gas material access way 10, gas-solid separator dipleg and compositions such as material returning device 11, gas-solid separator 12 and gas-solid separator outlet 13.Fuel (colm, solid waste, special fuels such as living beings) send into by fuel apparatus for feeding 1 and fully mix with the bed material in the main chamber burner hearth and burn, rise along burner hearth, enter the subsidiary combustion chamber 4 adjacent with main chamber from main chamber top flue gas material outlet 3, in the bottom of subsidiary combustion chamber 4, the flue gas material is carried effect secretly by inertial separation and flue gas, material is divided into two parts, and a part of material returns main chamber from a recycle stock inlet 9 and forms the circulation of first order material; Another part material enters subsidiary combustion chamber 5 with flue gas, final process final stage subsidiary combustion chamber exhanst gas outlet 6 enters gas-solid separator 12, return main chamber 2 from gas-solid separator dipleg and material returning device 11 through secondary material loop head 8 through separating, form second level material circulation.In the whole combustion process, material has formed one two stage material circulation in combustion apparatus.Traditional single-stage, vertical ciculation fluidized bed structure have been changed.The back-end ductwork of combustion apparatus provided by the present invention can arrange as requested that certain heating surface carries out corresponding heat utilization.
Fig. 3 is the material circulation schematic diagram of horizontal CFBC equipment symmetric arrangement embodiment provided by the present invention.Its equipment is similar to Fig. 2 with circulation theory, in the bilateral symmetric arrangement of main chamber 2 four subsidiary combustion chamber and two gas-solid separators.Fuel is sent into main chamber by the fuel apparatus for feeding, mix with the bed material and burn, rise along burner hearth, in main chamber top material enters subsidiary combustion chamber with the main chamber symmetric arrangement respectively, the symmetrical structure of the right and left is finished material circulation as shown in Figure 3 respectively, has formed multistage material circulating combustion thus.
Horizontal layout schematic diagram when Fig. 4 is a horizontal CFBC equipment single-sided arrangement provided by the present invention can arrange as required that behind gas-solid separator 12 province's coal gas, air preheater etc. form afterbody heat-exchange system 14.
Horizontal layout schematic diagram when Fig. 5 is a horizontal CFBC equipment symmetric arrangement provided by the present invention can arrange as required that behind the gas-solid separator of the two ends of symmetric arrangement structure province's coal gas, air preheater etc. form afterbody heat-exchange system 14.
Claims (4)
1. a horizontal CFBC equipment is characterized in that: two-stage subsidiary combustion chamber and gas-solid separator (12) that this combustion apparatus contains main chamber (2) and is arranged in juxtaposition with described main chamber; Described main chamber is provided with fuel apparatus for feeding (1), and its underpart and bottom are respectively equipped with recycle stock inlet (9), secondary cycle material inlet (8) and cloth wind system (7) one time; Be provided with the flue gas material outlet (3) that the subsidiary combustion chamber that is adjacent is connected on the top of main chamber; Be provided with flue gas material channel (10) in the furnace wall bottom between the two-stage subsidiary combustion chamber (4,5) up and down, be provided with exhanst gas outlet (6) on subordinate's subsidiary combustion chamber (5) top, described gas-solid separator is arranged on the exhanst gas outlet (6) of subordinate's subsidiary combustion chamber (5) and locates; Incline structure is adopted in two-stage subsidiary combustion chamber (4,5) bottom up and down, and the furnace wall between the major and minor combustion chamber forms ash bucket; Ash bucket by recycle stock enter the mouth (9) be connected with main chamber (2), gas-solid separator dipleg and material returning device (11) are connected with main chamber (2) by secondary cycle material inlet (8).
2. according to the described horizontal CFBC equipment of claim 1, it is characterized in that: described two-stage subsidiary combustion chamber is arranged in a side of described main chamber.
3. according to the described horizontal CFBC equipment of claim 1, it is characterized in that: described two-stage subsidiary combustion chamber is with respect to described main chamber symmetric arrangement.
4. circulating combustion method that adopts horizontal CFBC equipment as claimed in claim 1, it is characterized in that: material enters the subsidiary combustion chamber that is adjacent in main chamber burning back with flue gas, pass through inertial separation, part thermal material directly returns main chamber by the ash bucket of incline structure from a recycle stock inlet, a part of in addition thermal material is turned back through the subsidiary combustion chamber of back with flue gas, finally separate by gas-solid separator, return main chamber by the gas-solid separator dipleg through the secondary cycle material inlet, form two-stage circulating combustion method.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101263626A CN100417862C (en) | 2005-12-09 | 2005-12-09 | Horizontal circulating fluidized bed burning equipment and its circulating burning method |
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| CNB2005101263626A CN100417862C (en) | 2005-12-09 | 2005-12-09 | Horizontal circulating fluidized bed burning equipment and its circulating burning method |
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| CN100417862C true CN100417862C (en) | 2008-09-10 |
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Families Citing this family (5)
| 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 |
| CN103423869B (en) * | 2013-08-13 | 2016-04-13 | 北京热华能源科技有限公司 | A kind of Horizontal type circulating fluid bed heat-conducting oil furnace |
| CN104006382A (en) * | 2014-01-06 | 2014-08-27 | 徐进廷 | Circulating fluidized bed hot water boiler with multiple combustion chambers |
| CN105546528A (en) * | 2016-01-27 | 2016-05-04 | 北京热华能源科技有限公司 | Material circulating system and operation method of multi-process circulating fluidized bed boiler |
| CN105716075A (en) * | 2016-02-03 | 2016-06-29 | 山东佳星环保科技有限公司 | Circulating fluidized bed combustion equipment |
Citations (6)
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| JPS5733705A (en) * | 1980-08-08 | 1982-02-23 | Babcock Hitachi Kk | Method and apparatus for starting of fluidized bed boiler |
| CN1041646A (en) * | 1988-08-31 | 1990-04-25 | 株式会社荏原制作所 | Composite circulation fluidizing bed boiler |
| CN1082685A (en) * | 1992-05-22 | 1994-02-23 | 福斯特·惠勒能源公司 | The multistage stove of firing coal pyrolysis gas and coke |
| CN1144260A (en) * | 1995-09-01 | 1997-03-05 | 清华大学 | Gravity circulating bed gas-steam joint production boiler |
| US20030202913A1 (en) * | 2002-04-30 | 2003-10-30 | Mikhail Maryamchik | Compact footprint CFB with mechanical dust collector |
| CN2634299Y (en) * | 2003-07-17 | 2004-08-18 | 吕雪峰 | Double stage separation cleaner fluidized bed coal burning hot air furnace |
-
2005
- 2005-12-09 CN CNB2005101263626A patent/CN100417862C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5733705A (en) * | 1980-08-08 | 1982-02-23 | Babcock Hitachi Kk | Method and apparatus for starting of fluidized bed boiler |
| CN1041646A (en) * | 1988-08-31 | 1990-04-25 | 株式会社荏原制作所 | Composite circulation fluidizing bed boiler |
| CN1082685A (en) * | 1992-05-22 | 1994-02-23 | 福斯特·惠勒能源公司 | The multistage stove of firing coal pyrolysis gas and coke |
| CN1144260A (en) * | 1995-09-01 | 1997-03-05 | 清华大学 | Gravity circulating bed gas-steam joint production boiler |
| US20030202913A1 (en) * | 2002-04-30 | 2003-10-30 | Mikhail Maryamchik | Compact footprint CFB with mechanical dust collector |
| CN2634299Y (en) * | 2003-07-17 | 2004-08-18 | 吕雪峰 | Double stage separation cleaner fluidized bed coal burning hot air furnace |
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