CN105627301A - Circulating fluidized bed boiler for purely burning furfural residues - Google Patents
Circulating fluidized bed boiler for purely burning furfural residues Download PDFInfo
- Publication number
- CN105627301A CN105627301A CN201610150910.7A CN201610150910A CN105627301A CN 105627301 A CN105627301 A CN 105627301A CN 201610150910 A CN201610150910 A CN 201610150910A CN 105627301 A CN105627301 A CN 105627301A
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- China
- Prior art keywords
- combustion chamber
- bed combustion
- separator
- air
- fluidised bed
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- 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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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
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
-
- 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
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
-
- 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
- F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention belongs to the technical field of fluidized bed boilers and particularly relates to a circulating fluidized bed boiler for purely burning furfural residues. According to the circulating fluidized bed boiler for purely burning the furfural residues, a high-temperature platen superheater is arranged in a hearth; a fluidized bed combustion chamber is arranged on the lower portion of the interior of the hearth; a wind distribution plate is arranged at the bottom of the fluidized bed combustion chamber; a wind cap is arranged on the wind distribution plate; a wind chamber is arranged below the wind distribution plate; a residue discharge pipe is arranged in the wind chamber; an ignition device is arranged on the wind chamber; the upper portion of a separator communicates with an outlet in the upper portion of the hearth; a lower vertical pipe of the separator is connected with the upper portion of a material return system; the lower portion of the material return system communicates with the fluidized bed combustion chamber; a low-energy-consumption self-balancing material return valve is mounted on a vertical pipe of the material return system; an inlet of a vertical shaft flue communicates with an outlet tube in the center of the upper portion of the separator; an evaporation pipe bundle, low-temperature superheaters, economizers and an air preheater are all arranged in the vertical shaft flue; and the vertical shaft flue is further provided with soot blowing points.
Description
Technical field
The invention belongs to fluidized-bed combustion boiler technical field, it is specifically related to the circular fluid bed of a kind of pure burning furfural dregs taking furfural dregs as single-fuel.
Background technology
The waste residue that furfural dregs produces when being and refine furfural from corn cob, fugitive constituent height, water content height, and remain a little acid solution, ash content is low. The utilization ways of the furfural dregs of great majority is: adopts small-sized fixed grate fire burning, but is difficult to like this reach national requirements for environmental protection; Or naturally stack, discarded, produce to pollute. Due to the progressively raising of the increasingly strict of national environmental protection policy and living standards of the people, urgent requirement seeks a kind of new technology, is fully utilized from original state by furfural dregs, to reach the double requirements of economy and environmental benefit.
Characteristic during furfural dregs fuel combustion: be rich in potassium and sodium in furfural dregs ash, their compound and SiO2 reaction, generate the eutectic of low melting point, and soot particle, along the Gap Flow of ash, is bondd by the crystal of fusing, forms caking. The fusing carried secretly in flue gas or the soot particle alkalimetal silicate of semi-molten touch heating surface and condense, and constantly growth is gathered, and produces slagging scorification phenomenon on radiation of burner hearth heating surface. In furfural dregs, volatile substances is after mainly an alkali metal salt at high temperature volatilizees and enters gas phase, when flowing through convection heating surface, by the physical and chemical process of the alternate complexity of gas-solid, condense on convection heating surface surface, stick, sedimentation, producing long-pending ash, the molten state alkalimetal silicate in long-pending ash causes corrosion phenomenon. Simultaneously due to furfural dregs volatile content height, kindling temperature reduces, and upper furnace combustion share is big, and upper furnace temperature of combustion improves, and the wind ratio of joining of a secondary air needs careful consideration. Furfural dregs proportion is little, enters stove form unstable, it is necessary to emphasis considers the delivery system of furfural dregs fuel, and careful selection enters stove mode. Furfural dregs ash is low, and density is little, it is difficult to form material recurrent state stable, that enough measure, replenishment cycles material in Ying Lu, to keep normal bed pressure and solid circulating rate. Sulphur content height in furfural dregs, basic metal and sulphur reacting generating salt, play sulphur-fixing agent effect, the CaO content height in furfural dregs ash, strong from sweetening power. The C02 that furfural dregs discharges out in combustion with its process of growth absorbs the same many, so the clean discharge of air C02 is zero by furfural dregs burning.
Summary of the invention
The circular fluid bed being to provide a kind of pure combustion furfural dregs of the present invention, boiler oil adopts single furfural dregs fuel.
The technical scheme that the present invention takes for achieving the above object is:
The circular fluid bed of a kind of pure burning furfural dregs, comprise pot cylinder, burner hearth, high temperature pendant superheater and fluidised bed combustion chamber, wherein: also comprise secondary hot-air and enter stove arm, air compartment, scum pipe, portfire, separator, revert system, generating tube tank nest, low temperature superheater, economizer, vertical well gas flue, air preheater, less energy-consumption self-equilibrating material returning valve, air distribution plate and blast cap, the top that described high temperature pendant superheater is arranged in burner hearth, fluidised bed combustion chamber is arranged on the bottom in burner hearth, the bottom being positioned at high temperature section on the front wall of fluidised bed combustion chamber is provided with the furfural dregs fuel inlet communicated with fluidised bed combustion chamber, secondary hot-air enter stove arm be arranged on fluidised bed combustion chamber bottom and and fluidised bed combustion chamber communicate, air distribution plate is arranged on the bottom of fluidised bed combustion chamber, air distribution plate is provided with blast cap, air compartment is arranged on the lower section of air distribution plate, scum pipe is arranged in air compartment and extends to the outside of air compartment, portfire is arranged on air compartment, the top of separator communicates with the upper outlet of burner hearth, the lower riser of separator is connected with the top of revert system, the bottom of revert system communicates with fluidised bed combustion chamber, less energy-consumption self-equilibrating material returning valve is arranged on the standpipe of revert system, the entrance of vertical well gas flue communicates with the central outlet cylinder on separator top, generating tube tank nest, low temperature superheater, economizer and air preheater are all arranged in vertical well gas flue, vertical well gas flue is also provided with and blows ash point.
Separator of the present invention is adiabatic cyclonic separator, and the central outlet cylinder on its top is biased.
Air distribution plate of the present invention is water-cooled distributor, and blast cap is bell-type windshield, and air compartment is water cooled wind chamber, and scum pipe is water-cooled scum pipe.
Burner hearth of the present invention is membrane wall burner hearth, and is all welded with intensive pin and applies anti-wear plastic material on the indoor high temperature section water wall of fluidized-bed combustion.
The present invention adopts technique scheme, and for the singularity of furfural dregs fuel, boiler have chosen bigger furnace heating surface and amasss when designing, and with the temperature of combustion reduced in main circulation loop, controls at about 750 DEG C, to prevent slagging. Furfural dregs ash content is few, bed material adds materials and makes circulating ash, recycle stocks a large amount of in circular fluid bed main circulation loop, heating surface surface condensation thing is washed away, there is good certainly clear ash characteristic, water wall heating surface and the high temperature pendant superheater slagging scorification of burner hearth can be prevented, thus avoid corrosion. Furnace bottom arranges scum pipe, effectively displaces in combustion processes the little clinker generated. According to efficiency separator and fuel characteristic choose reasonable tail flue gas flow velocity, when guaranteeing abrasion, strengthen from deashing ability. Useful range at afterbody heating surface at different levels arranges soot blower, and requires selective sootblowing, effectively clear ash. Opening for feed is arranged in combustion chamber draft point, and furfural dregs enters in stove with secondary air, effectively prevents to material not smooth, and configuration annular conveying wind on supply pipe, makes airduct afterbody form negative pressure, effectively prevent flue gas anti-channeling. Have chosen bigger secondary air ratio, adapt to the feature that upper furnace combustion share is big, and enter burner hearth in suitable position, overheavy firing, prevent from reducing because temperature of combustion is low efficiency of combustion. Have employed the thermal insulation cyclonic separator of central tube bias structure and less energy-consumption self-equilibrating material returning valve, ensure when the material amount added is very little, burner hearth internal recycle material concentration can meet the requirement of circular fluid bed heat transfer, and material returning valve can effectively avoid coking in returning charge valve. Adopt contact attemperator during design, subtract temperature amplitude big, with the feature adapting to furfural dregs fuel moisture, calorific value variation range is big. Air distribution plate is water-cooled distributor, and blast cap is bell-type windshield, and air compartment is water cooled wind chamber, scum pipe is water-cooled heavy caliber scum pipe, after horizontally disposed water cooled wind chamber, low resistance bell-type windshield and stove, large-diameter water-cooled scum pipe has ensured that boiler is when burning, and fluidisation is good, and row's slag is smooth and easy. Fluidized-bed burner hearth is membrane wall burner hearth, is all welded with intensive pin and applies corrosive-proof plastic material, it is to increase work-ing life in combustion chamber on high temperature section water wall.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of air distribution plate of the present invention.
Embodiment
Embodiment 1
As depicted in figs. 1 and 2, the circular fluid bed of a kind of pure burning furfural dregs, comprise pot cylinder 7, membrane wall burner hearth 5, high temperature pendant superheater 6 and fluidised bed combustion chamber 3, wherein: also comprise secondary hot-air and enter stove arm 17, water cooled wind chamber 1, water-cooled scum pipe 2, portfire 16, adiabatic cyclonic separator 13, revert system 14, generating tube tank nest 8, low temperature superheater 9, economizer 10, vertical well gas flue 11, air preheater 12, less energy-consumption self-equilibrating material returning valve 15, water-cooled distributor 19 and bell-type windshield 20, the top that described high temperature pendant superheater 6 is arranged in membrane wall burner hearth 5, the bottom that fluidised bed combustion chamber 3 is arranged in membrane wall burner hearth 5, the bottom being positioned at high temperature section on the front wall of fluidised bed combustion chamber 3 is provided with the furfural dregs fuel inlet 4 communicated with fluidised bed combustion chamber 3, in fluidised bed combustion chamber 3, high temperature section water wall is all welded with intensive pin and applies anti-wear plastic material, secondary hot-air enter stove arm 17 be arranged on fluidised bed combustion chamber 3 bottom and and fluidised bed combustion chamber 3 communicate, water-cooled distributor 19 is arranged on the bottom of fluidised bed combustion chamber 3, water-cooled distributor 19 is provided with bell-type windshield 20, water cooled wind chamber 1 is arranged on the lower section of water-cooled distributor 19, water-cooled scum pipe 2 is arranged in water cooled wind chamber 1 and extends to the outside of water cooled wind chamber 1, portfire 16 is arranged on water cooled wind chamber 1, the adiabatic top of cyclonic separator 13 communicates with the upper outlet of membrane wall burner hearth 5, the adiabatic lower riser of cyclonic separator 13 is connected with the top of revert system 14, the bottom of revert system 14 communicates with fluidised bed combustion chamber 3, less energy-consumption self-equilibrating material returning valve 15 is arranged on the standpipe of revert system 14, the entrance of vertical well gas flue 11 communicates with the central outlet cylinder on adiabatic cyclonic separator 13 top, generating tube tank nest 8, low temperature superheater 9, economizer 10 and air preheater 12 are all arranged in vertical well gas flue 11, the central outlet cylinder on adiabatic cyclonic separator 13 top is biased, air preheater 12 is arranged on the afterbody of vertical well gas flue 11, vertical well gas flue 11 is also provided with and blows ash point 18.
Claims (4)
1. the circular fluid bed of a pure burning furfural dregs, comprise pot cylinder (7), burner hearth (5), high temperature pendant superheater (6) and fluidised bed combustion chamber (3), it is characterized in that also comprising secondary hot-air enters stove arm (17), air compartment (1), scum pipe (2), portfire (16), separator (13), revert system (14), generating tube tank nest (8), low temperature superheater (9), economizer (10), vertical well gas flue (11), air preheater (12), less energy-consumption self-equilibrating material returning valve (15), air distribution plate (19) and blast cap (20), the top that described high temperature pendant superheater (6) is arranged in burner hearth (5), the bottom that fluidised bed combustion chamber (3) is arranged in burner hearth (5), the bottom being positioned at high temperature section on the front wall of fluidised bed combustion chamber (3) is provided with the furfural dregs fuel inlet (4) communicated with fluidised bed combustion chamber (3), secondary hot-air enter stove arm (17) be arranged on fluidised bed combustion chamber (3) bottom and and fluidised bed combustion chamber (3) communicate, air distribution plate (19) is arranged on the bottom of fluidised bed combustion chamber (3), air distribution plate (19) is provided with blast cap (20), air compartment (1) is arranged on the lower section of air distribution plate (19), scum pipe (2) is arranged in air compartment (1) and extends to the outside of air compartment (1), portfire (16) is arranged on air compartment (1), the top of separator (13) communicates with the upper outlet of burner hearth (5), the lower riser of separator (13) is connected with the top of revert system (14), the bottom of revert system (14) communicates with fluidised bed combustion chamber (3), less energy-consumption self-equilibrating material returning valve (15) is arranged on the standpipe of revert system (14), the entrance of vertical well gas flue (11) communicates with the central outlet cylinder on separator (13) top, generating tube tank nest (8), low temperature superheater (9), economizer (10) and air preheater (12) are all arranged in vertical well gas flue (11), vertical well gas flue (11) is also provided with and blows ash point (18).
2. the circular fluid bed of pure burning furfural dregs according to claim 1, is characterized in that described separator (13) is for adiabatic cyclonic separator, and the central outlet cylinder on its top is biased.
3. the circular fluid bed of pure burning furfural dregs according to claim 1, it is characterized in that described air distribution plate (19) is water-cooled distributor, blast cap (20) is bell-type windshield, air compartment (1) is water cooled wind chamber, and scum pipe (2) is water-cooled scum pipe.
4. the circular fluid bed of pure burning furfural dregs according to claim 1, it is characterized in that described burner hearth (5) is membrane wall burner hearth, and in fluidised bed combustion chamber (3), high temperature section water wall is all welded with intensive pin and applies anti-wear plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150910.7A CN105627301A (en) | 2016-03-16 | 2016-03-16 | Circulating fluidized bed boiler for purely burning furfural residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150910.7A CN105627301A (en) | 2016-03-16 | 2016-03-16 | Circulating fluidized bed boiler for purely burning furfural residues |
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| CN105627301A true CN105627301A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610150910.7A Pending CN105627301A (en) | 2016-03-16 | 2016-03-16 | Circulating fluidized bed boiler for purely burning furfural residues |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107763593A (en) * | 2017-11-21 | 2018-03-06 | 贵州新能源开发投资股份有限公司 | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed superheated steam boiler of pure combustion |
| CN107940448A (en) * | 2017-12-19 | 2018-04-20 | 太原锅炉集团有限公司 | A kind of pulverized coal particle recirculating fluidized bed combustion system and its combustion method |
| CN109268807A (en) * | 2018-10-10 | 2019-01-25 | 哈尔滨锅炉厂有限责任公司 | A kind of circulating fluidized bed boiler of the 220t/h grade of medium temperature and medium pressure parameter |
| CN110260301A (en) * | 2019-07-18 | 2019-09-20 | 曹德鸣 | The energy-saving biomass recirculating fluidized bed boiler of minimum discharge |
| CN116146988A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | System and method for disposing and separating metal oxide from oil residue gasification filter cake |
| CN117588755A (en) * | 2023-12-27 | 2024-02-23 | 中科合肥煤气化技术有限公司 | Circulating fluidized bed incinerator system and method for recycling low-heating value gasified fly ash |
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| CN205606538U (en) * | 2016-03-16 | 2016-09-28 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler of pure fever furfural sediment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107763593A (en) * | 2017-11-21 | 2018-03-06 | 贵州新能源开发投资股份有限公司 | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed superheated steam boiler of pure combustion |
| CN107940448A (en) * | 2017-12-19 | 2018-04-20 | 太原锅炉集团有限公司 | A kind of pulverized coal particle recirculating fluidized bed combustion system and its combustion method |
| CN109268807A (en) * | 2018-10-10 | 2019-01-25 | 哈尔滨锅炉厂有限责任公司 | A kind of circulating fluidized bed boiler of the 220t/h grade of medium temperature and medium pressure parameter |
| CN110260301A (en) * | 2019-07-18 | 2019-09-20 | 曹德鸣 | The energy-saving biomass recirculating fluidized bed boiler of minimum discharge |
| CN110260301B (en) * | 2019-07-18 | 2024-03-08 | 河南华泰石化装备股份有限公司 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
| CN116146988A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | System and method for disposing and separating metal oxide from oil residue gasification filter cake |
| CN117588755A (en) * | 2023-12-27 | 2024-02-23 | 中科合肥煤气化技术有限公司 | Circulating fluidized bed incinerator system and method for recycling low-heating value gasified fly ash |
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