CN104654348A - Reducing-atmosphere high-temperature flue gas generation system - Google Patents
Reducing-atmosphere high-temperature flue gas generation system Download PDFInfo
- Publication number
- CN104654348A CN104654348A CN201510084651.8A CN201510084651A CN104654348A CN 104654348 A CN104654348 A CN 104654348A CN 201510084651 A CN201510084651 A CN 201510084651A CN 104654348 A CN104654348 A CN 104654348A
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- Prior art keywords
- flue gas
- temperature flue
- housing
- chamber
- gas generation
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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- 239000003546 flue gas Substances 0.000 title claims abstract description 40
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 17
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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory Effects 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Abstract
The invention discloses a reducing-atmosphere high-temperature flue gas generation system. The reducing-atmosphere high-temperature flue gas generation system comprises a fluidized bed gasifier and a combustion tempering device which is in serial connection, wherein the combustion tempering device is provided with a cylindrical shell, a hot gas inlet is formed in the top part of the shell, and the bottom part of the shell is provided with a flue gas outlet pipe; a combustor is arranged at the inner top part of the shell, an annular separating plate is arranged at the outer part of the lower section of the combustor, an annular air supply chamber is integrally formed by welding the annular separating plate and the inner wall of the shell, the lower part of the combustor is in butt joint with a cylinder to form a combustion chamber, an annular air distribution chamber is formed by a gap between the cylinder and the shell, an inner sleeve is arranged in the shell and under the air distribution chamber, an upper annular air chamber and a lower air chamber are arranged, the lower annular air chamber is connected with a combustion-supporting air inlet pipe, and the upper annular air chamber is communicated with the air supply chamber through a plurality of communicating pipes. According to the reducing-atmosphere high-temperature flue gas generation system disclosed by the invention, the problems of an existing reducing-atmosphere high-temperature flue gas generation device that the investment is large, the energy consumption is high, and the flue gas quality is unstable are solved, and the reducing-atmosphere high-temperature flue gas generation system is mainly used for flash roasting of iron ore powder and other technologies of high-temperature flue gas and the like in need of combustible components in certain amount.
Description
Technical field
The present invention relates to Industrial Stoves equipment, specifically a kind of reducing atmosphere high-temperature flue gas generation systems.
Background technology
In some special industry production technology, as the shower roasting technique of Iron Ore Powder, need the high-temperature hot flue gas (also claiming reducing atmosphere high-temperature flue gas) providing a certain amount of (controlled) combustible component (as gases such as CO).But up to the present also there is no the approved product producing reducing atmosphere high-temperature flue gas, adopt common combustion gas furnace to produce high-temperature flue gas in the shower roasting system run, then adopt gas generator to ooze mixed coal controlled atmosphere to high-temperature flue gas and become reducing atmosphere high-temperature flue gas, the fuel gas content regulating the ratio of high-temperature flue gas and coal gas to control mixed flue gas by valve in production meets the process requirements of shower roasting system, Problems existing is: operation stability is poor, reducing atmosphere high-temperature flue gas quality is unstable, regulate the CO content difficulty in flue gas, process is needed to raw coal, equipment investment is large, energy consumption is high.
Summary of the invention
Object of the present invention will solve existing reducing atmosphere high-temperature flue gas production system poor stability exactly, and regulate the CO content difficulty in flue gas, the problems such as equipment investment is large, and energy consumption is high, provide a kind of reducing atmosphere high-temperature flue gas generation systems.
Concrete scheme of the present invention is: a kind of reducing atmosphere high-temperature flue gas generation systems, it is characterized in that: the burning modifying device including a fluidized-bed gasification furnace and a serial connection, described burning modifying device has barrel-type casing, the top of housing is provided with heating gas import and exports with the heating gas of fluidized-bed gasification furnace and docked by gas pipe, and the bottom of housing is provided with the outlet of reducing atmosphere high-temperature flue gas and pipe; At housing inner top, a burner is installed to be connected with heating gas import, be provided with a toroidal membrane in burner hypomere outside and inner walls welded, toroidal membrane has some air vents, combustor sidewalls, between toroidal membrane and housing three, form annular air supplying chamber, combustion chamber is formed to being connected to a cylindrical shell in the below of burner, have spacing to form annular distribution plenum between cylindrical shell and housing, on housing, corresponding distribution plenum is provided with aid distributing pipe; Housing inner air-distributing room is to have inner sleeve, spacing is had to form ventilating duct between inner sleeve and housing, be provided with upper and lower annular air compartment at the upper and lower two ends of ventilating duct, lower annular air compartment is connected with combustion-supporting blast pipe, and upper annular air compartment is by being communicated with air supplying chamber some communicating pipes; The inner chamber of described inner sleeve is burning mixing chamber, and the upper end of burning mixing chamber is communicated with distribution plenum with combustion chamber.
In the bottom of burning mixing chamber, outstanding umbrella is installed in the present invention.
Described in the present invention, fluidized-bed gasification furnace has body of heater, and upper of furnace body is provided with heating gas outlet, and bottom is furnished with coal-supply system, and bottom is provided with air distribution plate, high pressure air compartment, fuel burner nozzle, air feed system, secondary air feed system, a nitrogen allocate system into.
Burner described in the present invention has a tubaeform housing, it is suitable for reading littlely docks with gas pipe, end opening is comparatively large just to combustion chamber placement, be provided with some for airduct in housing, being welded in tubaeform housing sidewall for one end of airduct and being communicated with air supplying chamber, the other end for airduct is downward just to combustion chamber placement.
At least one peep hole is provided with at the top of burning modifying device housing in the present invention.
Burning on modifying device housing and cylindrical shell just to being provided with at least one observation window in the middle part of combustion chamber in the present invention.
Burn described in the present invention in modifying device, aid distributing pipe is equipped with volume damper, pipe is equipped with thermometer communication connection controller control connection volume damper.
Burn described in the present invention in modifying device, combustion-supporting blast pipe is equipped with volume damper, pipe is equipped with CO content detection meter communication connection controller control connection volume damper.
On aid distributing pipe, Pressure gauge is housed in the present invention, blast pipe is equipped with flowmeter.
Operation principle of the present invention is: coal enters fluidized combustion under air effect after fluidized-bed gasification furnace, gasification, and the coal gas that gasification furnace produces enters the modified room of burning, under the strong cyclonic action of burning wind, mix with air, burn generation high temperature cigarette; By regulating the temperature of circulated air Boiler pressure control reducing atmosphere high-temperature flue gas, by regulating the combustion air volume in burning modifying device, control the fuel gas content of reducing atmosphere high-temperature flue gas.
The present invention breaches traditional mode of production mode, courageously have employed fluidized-bed gasification furnace aerogenesis, undertaken modified by specially designed burning modifying device again, control temperature and the fuel gas content of high-temperature flue gas, investment reduces nearly 30%, and energy consumption reduces about 15%, easy to operate, it is stable that aerogenesis quality is adjustable, has significant economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is the top view of burning modifying device;
Fig. 3 is the A-A view in Fig. 2.
In figure: 1-body of heater, 2-coal-supply system, 3-nitrogen allocates system into, 4-fuel burner nozzle, 5-air feed system, 6-secondary air feed system, 7-pipe, 8-lower annular air compartment, 9-outstanding umbrella, 10-inner sleeve, 11-ventilating duct, 12-housing, 13-upper annular air compartment, 14-distribution plenum, 15-communicating pipe, 16-toroidal membrane, 17-gas pipe, the import of 18-heating gas, 19-burner, 20-air supplying chamber, 21-Pressure gauge, 22-cylindrical shell, 23-control valve, 24-aid distributing pipe, 25-control valve, 26-combustion-supporting blast pipe, 27-flowmeter, 28-thermometer, 29-CO content detection meter, 30-for airduct, 31-air vent, 32-peep hole, 33-observation window, 34-combustion chamber, 35-burning mixing chamber.
Detailed description of the invention
See Fig. 1-3, the present invention includes the burning modifying device of a fluidized-bed gasification furnace and a serial connection, described burning modifying device has barrel-type casing 12, the top of housing 12 is provided with heating gas import 18 and exports with the heating gas of fluidized-bed gasification furnace and docked by gas pipe 17, and the bottom of housing 12 is provided with the outlet of reducing atmosphere high-temperature flue gas and pipe 7; At housing 12 inner top, a burner 19 is installed to be connected with heating gas import 18, a toroidal membrane 16 is provided with welded with housing 12 inwall in burner 19 hypomere outside, toroidal membrane 16 has some air vents 31, burner 19 sidewall, between toroidal membrane 16 and housing 12 three, form annular air supplying chamber 20, combustion chamber 34 is formed to being connected to a cylindrical shell 22 in the below of burner, have spacing to form annular distribution plenum 14 between cylindrical shell 22 and housing 12, on housing 12, corresponding distribution plenum 14 is provided with aid distributing pipe 24; Housing 12 inner air-distributing room 14 is to have inner sleeve 10, spacing is had to form ventilating duct 11 between inner sleeve 10 and housing 12, upper and lower annular air compartment 13,8 is provided with at ventilating duct about 11 two ends, lower annular air compartment 8 is connected with combustion-supporting blast pipe 26, and upper annular air compartment 13 was communicated with air supplying chamber 20 by four communicating pipe 15; The inner chamber of described inner sleeve 10 is burning mixing chamber 35, and the upper end of burning mixing chamber 35 is communicated with distribution plenum 14 with combustion chamber 34.
Outstanding umbrella 9 is installed, to strengthen mixing of gas in the bottom of burning mixing chamber 35 in the present embodiment.
Fluidized-bed gasification furnace described in the present embodiment has body of heater 1, body of heater 1 top is provided with heating gas outlet, bottom is furnished with coal-supply system 2, bottom is provided with air distribution plate, high pressure air compartment, fuel burner nozzle 4, air feed system 5, secondary air feed system 6, a nitrogen allocate system 3 into, substantially identical with Conventional fluidization bed gasification furnace structure.
Burner described in the present embodiment has a tubaeform housing, it is suitable for reading littlely docks with gas pipe, end opening is comparatively large just to combustion chamber placement, eight (more than the general six roots of sensation better) are provided with for airduct 30 in housing, being welded in tubaeform housing sidewall for one end of airduct 30 and being communicated with air supplying chamber 20, the other end for airduct 30 is just arranged combustion chamber 34 downwards.
Be provided with two peep holes 32 at the top of burning modifying device housing in the present embodiment, burning just to being provided with an observation window 33 in the middle part of combustion chamber 34 on modifying device housing and cylindrical shell 22 simultaneously, observing internal-combustion situation to facilitate.
Burn described in the present embodiment in modifying device, aid distributing pipe 24 is equipped with volume damper 23, pipe 7 is equipped with thermometer 28 and communicates to connect controller control connection volume damper 23 and carry out air distribution adjustment.
Burn described in the present embodiment in modifying device, combustion-supporting blast pipe 26 is equipped with volume damper 25, pipe 7 is equipped with CO content detection meter 29 and communicates to connect controller control connection volume damper 25 and carry out air feed proportion adjustment.
On aid distributing pipe 24, Pressure gauge 21 is housed in the present embodiment, blast pipe is equipped with flowmeter 27, grasp air distribution, aspiration pressure, flow to facilitate, ensure stable.
Claims (9)
1. a reducing atmosphere high-temperature flue gas generation systems, it is characterized in that: the burning modifying device including a fluidized-bed gasification furnace and a serial connection, described burning modifying device has barrel-type casing, the top of housing is provided with heating gas import and exports with the heating gas of fluidized-bed gasification furnace and docked by gas pipe, and the bottom of housing is provided with the outlet of reducing atmosphere high-temperature flue gas and pipe; At housing inner top, a burner is installed to be connected with heating gas import, be provided with a toroidal membrane in burner hypomere outside and inner walls welded, toroidal membrane has some air vents, combustor sidewalls, between toroidal membrane and housing three, form annular air supplying chamber, combustion chamber is formed to being connected to a cylindrical shell in the below of burner, have spacing to form annular distribution plenum between cylindrical shell and housing, on housing, corresponding distribution plenum is provided with aid distributing pipe; Housing inner air-distributing room is to have inner sleeve, spacing is had to form ventilating duct between inner sleeve and housing, be provided with upper and lower annular air compartment at the upper and lower two ends of ventilating duct, lower annular air compartment is connected with combustion-supporting blast pipe, and upper annular air compartment is by being communicated with air supplying chamber some communicating pipes; The inner chamber of described inner sleeve is burning mixing chamber, and the upper end of burning mixing chamber is communicated with distribution plenum with combustion chamber.
2. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, is characterized in that: be provided with outstanding umbrella in the bottom of described burning mixing chamber.
3. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, it is characterized in that: described fluidized-bed gasification furnace has body of heater, upper of furnace body is provided with heating gas outlet, bottom is furnished with coal-supply system, and bottom is provided with air distribution plate, high pressure air compartment, fuel burner nozzle, air feed system, secondary air feed system, a nitrogen allocate system into.
4. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, it is characterized in that: described burner has a tubaeform housing, it is suitable for reading littlely docks with gas pipe, end opening is comparatively large just to combustion chamber placement, be provided with some for airduct in housing, being welded in tubaeform housing sidewall for one end of airduct and being communicated with air supplying chamber, the other end for airduct is downward just to combustion chamber placement.
5. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, is characterized in that: be provided with at least one peep hole at the top of burning modifying device housing.
6. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, is characterized in that: just to being provided with at least one observation window in the middle part of combustion chamber on burning modifying device housing and cylindrical shell.
7. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, is characterized in that: in described burning modifying device, aid distributing pipe is equipped with volume damper, and pipe is equipped with thermometer communication connection controller control connection volume damper.
8. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1, it is characterized in that: in described burning modifying device, combustion-supporting blast pipe is equipped with volume damper, pipe is equipped with CO content detection meter communication connection controller control connection volume damper.
9. a kind of reducing atmosphere high-temperature flue gas generation systems according to claim 1 or 7 or 8, is characterized in that: on aid distributing pipe, Pressure gauge is housed, blast pipe is equipped with flowmeter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504853A (en) * | 2017-02-27 | 2018-09-07 | 湖北凤山矿业有限公司 | A kind of Coal Gasification and iron ore magnetic roasting process integration and its device |
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| CN104654348B (en) | 2017-01-25 |
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