CN104593086B - It is a kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism - Google Patents
It is a kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism Download PDFInfo
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- CN104593086B CN104593086B CN201510054205.2A CN201510054205A CN104593086B CN 104593086 B CN104593086 B CN 104593086B CN 201510054205 A CN201510054205 A CN 201510054205A CN 104593086 B CN104593086 B CN 104593086B
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- Prior art keywords
- blanking channel
- gasification furnace
- cyclone
- nitrogen
- heater
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
A kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism, it is related to a kind of powder coal gasification furnace, and in particular to a kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism.The present invention in order to solve combustible content in the flying dust that existing powder coal gasification furnace is produced it is high and thus it is caused it is higher than coal consumption, efficiency of carbon con version is low the problem of.The present invention includes gasification body of heater, pipeline, cyclone separator, the vertical blanking channel of Cyclone outlet, working gas flow control valve, process gas pipes and horizontal blanking channel.The present invention is used for coal chemical technology.
Description
Technical field
The present invention relates to a kind of powder coal gasification furnace, and in particular to one kind drives back with nitrogen, vapor, synthesis gas
Expect the powder coal gasification furnace of mechanism, belong to coal chemical technology.
Background technology
At present, crude oil is nervous in world wide, and its price can be in any more, and China is the country of oil-poor many coals,
Quite in long-term, coal is main primary energy.Therefore, country proposes clear energy sources policy, and use rationally utilizes coal
Every behave.In this case, this clean coal technology that gasifies is undoubtedly raising coal utilization efficiency, reduces pollution and real
The effective means of existing comprehensive utilization of energy, and gasification furnace is then most important equipment in whole piece production system.
The present invention is directed powder coal gasification furnace.The gasification furnace capital equipment is by coal gasifier, cyclone separator, remaining
Thimble-tube boiler and cooling cleaner composition.The powder coal gasification furnace of active service does not force feeding back device, uniquely relies on back
Material is under gravity by the natural returning charge of tremie pipe, and its returning charge effect is poor, therefore current powder coal gasification furnace is in operation
During be primarily present the problem of unburned combustible in fly ash is higher (unburned combustible in fly ash is 20%-80%), cause coal gas
The efficiency of carbon con version for changing stove is low, higher than coal consumption.
The content of the invention
Combustible content in the flying dust that existing powder coal gasification furnace is produced is high and thus caused ratio to solve by the present invention
The problem of coal consumption is high, efficiency of carbon con version is low, and then propose a kind of grace for driving material return mechanism with nitrogen, vapor, synthesis gas
Powder coal gasification furnace.
The present invention adopts the technical scheme that to solve the above problems：The present invention includes gasification body of heater, pipeline, cyclonic separation
The vertical blanking channel of device, Cyclone outlet, working gas flow control valve, process gas pipes and horizontal blanking channel,
The middle part of gasification body of heater upper surface is connected by the entrance of pipeline and cyclone separator, and the top of cyclone separator goes out provided with gas phase
Mouthful, the lower end of cyclonic separation is connected with the upper end of the vertical blanking channel of Cyclone outlet, under Cyclone outlet is vertical
The lower end of material passage is connected with one end of horizontal blanking channel, and the bottom of the other end and gasification body of heater of horizontal blanking channel connects
Connect, process gas pipes are inserted on the lateral wall of the vertical blanking channel bottom of Cyclone outlet, working gas flow is adjusted
Save valve to be arranged in process gas pipes, steam and oxygen mix are sequentially provided with from the bottom to top on the lateral wall for the lower portion of furnace body that gasifies
Thing entrance, gasification furnace base pressure measuring point, fine coal entrance, process gas pipes connection high steam or high pressure nitrogen or high pressing
Into gas.
Beneficial effects of the present invention are as follows compared with prior art：
First, the present invention is stable, safe and reliable：If being feeding back device working gas using air, contain in air
21% O2, and the main component of coal gas is CO and H2, O2With CO and H2It can react, generate in the gasification furnace of high temperature
CO2And H2O, can reduce the calorific value of coal gas.The two other reactions are all violent exothermic reactions, when situation is serious, gasification furnace meeting
There is the danger exploded；And working gas of the present invention is nitrogen or vapor or synthesis gas；Nitrogen is inertia
Gas, vapor is gasified raw material, and synthesis gas (coal gas) is the synthesis gas in gasification product, therefore working gas and gasification furnace
(coal gas) does not react, will not more set off an explosion, safe and reliable.
2nd, the present invention is recycled back to the ash quantity difference of gasification furnace：The Effiency of whirlwind Separator of existing grace gasification furnace is
90% or so, the interior coal gas produced of gasification furnace carries ash and enters cyclone separator at cyclone inlet, wherein having 10%
Particle diameter for 0~20 micron ash with coal gas from separator gaseous phase outlet flow out, be left 90% ash quantity particle diameter be 20~1000
The ash of micron, which is separated, falls into separator outlet.But, at existing powder coal gasification furnace Cyclone outlet
Pressure ratio gasifies the low 700-1400Pa of pressure of furnace bottom so that the coal gas of gasification furnace bottom is through blanking channel to cyclone separator
Interior flowing, this part rise air-flow carry Cyclone outlet at 95% ash (20~200 microns of grain diameter) to point
Flow, and together flowed out with coal gas from the gaseous phase outlet of cyclone separator from device gaseous phase outlet, this part ash can not be smooth
Return gasification furnace, 5% ash (200~1000 microns of grain diameter) gravity is more than ascending air at Cyclone outlet
Buoyancy, can be burnt by blanking channel into gasification furnace bottom cycle, therefore be recycled back to that gasification furnace ash quantity is few, grey circulating ratio
It is small.After the present invention, ash separated through cyclone separator after at blanking channel dust stratification formation material envelope.Because dust stratification isolation gasification
Influence of the furnace bottom high pressure to cyclone separator flow field, will not produce ascending air, and cyclone separator can be with normal work, gas
Change the coal gas carrying ash produced in stove and enter cyclone separator at cyclone inlet, wherein the particle diameter of 90% ash quantity is 20
~1000 microns of ash, which can be separated, to be fallen into Cyclone outlet blanking channel, under high-pressure working gas effect
It is grey smoothly to enter in gasification furnace.Therefore, 90% ash quantity (20~1000 microns of grain diameter) can pass through in cyclone separator
Vertical blanking channel, horizontal blanking channel, into the recycling of the bottom of gasification furnace 4.It follows that using Posterior circle return-air of the present invention
The ash quantity for changing stove is existing gasification furnace more than 18 times, therefore is recycled back to the ash quantity of gasification furnace and substantially increases, and grey circulating ratio increases
Plus.
3rd, the unburned combustible in fly ash of gasification furnace of the present invention is different：Coal gas at the top of existing powder coal gasification furnace out
Carry ash in, only less than 5% ash return gasification furnace enter hearth combustion, gasification furnace interior circulation gasification, and combustion ash compared with
Few, the ash for having 95% is discharged with coal gas by the gaseous phase outlet of cyclone separator, and the ash quantity being recycled back in gasification furnace is less, and grey follows
Ring multiplying power is low, and unburned combustible in fly ash is higher (about 20%-80%) in the ash of discharge.After the present invention, top of gasification furnace goes out
The coal gas come is carried in ash, is had 90% ash to return to gasification furnace and is entered hearth combustion, grey circulating ratio is significantly improved, especially
The ash for making more particle diameters smaller returns to gasification furnace and further burnt, and the small coal of particle diameter is easily fully contacted with thermal-flame,
Beneficial to combustible after-flame so that further burning discharges coal gas to the carbon residue in ash in gasification furnace.Thus use heel row of the present invention
Unburned combustible in fly ash will be reduced substantially in ash discharge.
4th, flexible adjustment of the invention is different：Existing powder coal gasification furnace, when the ash content of as-fired coal matter changes
When, because in blanking channel without any device, therefore can not adjust through cyclone separator enter blanking channel return burner hearth circulation combustion
The ash quantity of burning.After the present invention, dust stratification height is between two level-sensing devices in blanking channel during normal work, when as-fired coal matter
Ash content when changing, the ash quantity for being separated through cyclone separator and entering blanking channel changes, and dust stratification is high in tremie pipe
Degree is changed, and the work gas scale into blanking channel is adjusted by adjustment work gas flow regulating valve, makes dust stratification
Highly it is continually maintained between two level-sensing devices, the ash that cyclone separator is separated under the promotion of working gas then can be complete
Portion returns to burner hearth circulating combustion.Thus the regulation of ash quantity of the present invention to being recycled back to gasification furnace is more flexible.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, a kind of nitrogen gas and water that carries described in present embodiment is steamed
Gas, the powder coal gasification furnace of synthesis gas driving material return mechanism include gasification body of heater 4, pipeline 6, cyclone separator 8, cyclonic separation
Device exports vertical blanking channel 9, working gas flow control valve 12, process gas pipes 13 and horizontal blanking channel 14, gasification
The middle part of the upper surface of body of heater 4 is connected by pipeline 6 with the entrance of cyclone separator 8, and the top of cyclone separator 8 goes out provided with gas phase
Mouth 7, the lower end of cyclonic separation 8 is connected with the upper end of the vertical blanking channel of Cyclone outlet 9, and Cyclone outlet is vertical
The lower end of blanking channel 9 is connected with one end of horizontal blanking channel 14, the other end and the gasification body of heater 4 of horizontal blanking channel 14
Bottom is connected, and process gas pipes 13 are inserted on the lateral wall of the vertical bottom of blanking channel 9 of Cyclone outlet, work gas
Body flow control valve 12 is arranged in process gas pipes 13, is sequentially provided with from the bottom to top on the lateral wall of gasification body of heater 4 bottom
Steam and oxygen mixture entrance 1, gasification furnace base pressure measuring point 2, fine coal entrance 3, the connection high pressure of process gas pipes 13 are steamed
Vapour or high pressure nitrogen or high pressure synthesis gas.
The vertical blanking channel 9 of Cyclone outlet leads to the composition L-shaped blanking of horizontal blanking channel 14 in present embodiment
Road.In the course of work, the complete particle of unreacted separated through cyclone separator after in the vertical blanking channel 9 of wind separator outlet and water
Dust stratification formation material envelope at flat blanking channel 14, completely cuts off influence of the high pressure of gasification furnace bottom to cyclone separator flow field so that
Thinner particle can also be fallen by gravity, meanwhile, blanking is led to by high steam (or high pressure nitrogen or high pressure synthesis gas)
The dust stratification of road bottom is blown into gasification furnace bottom, and the dust stratification of blanking channel bottom is blown into gasification furnace bottom by working gas, made
It participates in gasification reaction again.Feed back piling height is vertically lowered in pipe between two level-sensing devices, once exceed or be less than
During the controlling level scope of setting, adjusted by adjustment work gas flow regulating valve, be returned to the altitude range of setting
In.
The connection high steam of process gas pipes 13 or high pressure nitrogen or high pressure synthesis gas in present embodiment.
Embodiment two：Illustrate present embodiment with reference to Fig. 1, a kind of nitrogen gas and water that carries described in present embodiment is steamed
Gas, the top of the gasification body of heater 4 of the powder coal gasification furnace of synthesis gas driving material return mechanism are provided with top of gasification furnace pressure-measuring-point
5.Other compositions and annexation are identical with embodiment one.
Embodiment three：Illustrate present embodiment with reference to Fig. 1, a kind of nitrogen gas and water that carries described in present embodiment is steamed
Gas, synthesis gas driving material return mechanism powder coal gasification furnace the vertical blanking channel 9 of Cyclone outlet outer wall on by
The first level-sensing device 10 and the second level-sensing device 11 are up to sequentially provided with down.Other compositions and annexation and the phase of embodiment one
Together.
Operation principle
Circulating ash is through cyclone separator blanking channel 9, dust stratification formation material envelope, isolation at blanking channel 9, blanking channel 14
Influence of the high pressure of gasification furnace bottom to cyclone separator flow field so that thinner particle can also be fallen by gravity.From remaining
The steam that heat boiler draws steam pressure about 0.6-1MPa enters process gas pipes 13, and steam is sprayed into by process gas pipes 13
In blanking channel 9.In the presence of high steam of the circulating ash in blanking channel 9, enter through blanking channel 10 and followed in gasification furnace 4
Ring burns, and makes the further after-flame of the carbon residue in ash, reduces the ratio coal consumption of gasification furnace, improves efficiency of carbon con version.In addition, by adjusting work
Making gas flow regulating valve 12 makes dust stratification height between the first level-sensing device 10, the second level-sensing device 11.
Embodiment
Certain coal chemical industry company uses a gas production design load for 20000Nm3/ h powder coal gasification furnace production coal gas,
Live DCS pictures show the top pressure 800Pa lower than gasification furnace base pressure of gasification furnace, and gasification furnace produces ash quantity 3 per hour
Ton, unburned combustible in fly ash is 35%.
After the present invention, gasifier operation is stable, 0.316 ton of ash quantity is produced per hour, unburned carbon in flue dust is 10.5%.
Gasification furnace improves 8 percentage points than coal consumption reduction, efficiency of carbon con version.
Therefore, the present invention can effectively solve powder coal gasification furnace and be primarily present unburned combustible in fly ash in the process of running
It is higher, cause the problem of ratio coal consumption of gasification furnace is high, efficiency of carbon con version is low.
Claims (1)
1. a kind of carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism, it includes gasification body of heater
(4), pipeline (6), cyclone separator (8), the vertical blanking channel of Cyclone outlet (9), working gas flow control valve
(12), process gas pipes (13) and horizontal blanking channel (14), gasify body of heater (4) upper surface middle part by pipeline (6) with
The entrance connection of cyclone separator (8), the top of cyclone separator (8) is provided with gaseous phase outlet (7), cyclone separator (8)
End is connected with the upper end of the vertical blanking channel of Cyclone outlet (9), under the vertical blanking channel of Cyclone outlet (9)
End is connected with one end of horizontal blanking channel (14), and the other end of horizontal blanking channel (14) connects with the bottom of gasification body of heater (4)
Connect, process gas pipes (13) are inserted on the lateral wall of the vertical blanking channel of Cyclone outlet (9) bottom, working gas
Flow control valve (12) is arranged in process gas pipes (13), on the lateral wall of body of heater (4) bottom that gasifies from the bottom to top successively
Provided with steam and oxygen mixture entrance (1), gasification furnace base pressure measuring point (2), fine coal entrance (3), process gas pipes
(13) connection high steam or high pressure nitrogen or high pressure synthesis gas, it is characterised in that：The vertical blanking channel of Cyclone outlet
(9) with horizontal blanking channel (14) constitute L-shaped blanking channel, process gas pipes (13) connection high steam or high pressure nitrogen or
High pressure synthesis gas；The top of gasification body of heater (4) is provided with top of gasification furnace pressure-measuring-point (5)；The vertical blanking of Cyclone outlet
The first level-sensing device (10) and the second level-sensing device (11) are from top to bottom sequentially provided with the outer wall of passage (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054205.2A CN104593086B (en) | 2015-01-30 | 2015-01-30 | It is a kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054205.2A CN104593086B (en) | 2015-01-30 | 2015-01-30 | It is a kind of to carry the powder coal gasification furnace that nitrogen, vapor, synthesis gas drive material return mechanism |
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| CN104593086A CN104593086A (en) | 2015-05-06 |
| CN104593086B true CN104593086B (en) | 2017-10-03 |
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| CN105199782A (en) * | 2015-09-11 | 2015-12-30 | 哈尔滨工业大学 | Gasification agent, strong-rotating pulverized coal and fly ash mixed-burning gasifier device and method |
| RU2683751C1 (en) * | 2018-05-24 | 2019-04-01 | Общество с ограниченной ответственностью "Новые физические принципы" | Method of gasification of coal in a highly overheated water vapor and device for its implementation |
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| CN1221777A (en) * | 1997-12-31 | 1999-07-07 | 中国科学院广州能源研究所 | Method and appts. for producing medium-heat value combustible gas from oxygen gasified of biological substances |
| US7329309B2 (en) * | 2004-12-22 | 2008-02-12 | Exxonmobil Chemical Patents Inc. | Gas-solids separation device and method |
| CN102994163A (en) * | 2011-09-14 | 2013-03-27 | 邢献军 | Circulating fluidized bed pulverized coal high-temperature gasification device |
| JP2014237735A (en) * | 2013-06-06 | 2014-12-18 | 株式会社Ihi | Circulating fluidized bed gasification furnace |
| CN103820170B (en) * | 2014-02-21 | 2015-09-02 | 陕西延长石油（集团）有限责任公司碳氢高效利用技术研究中心 | The conversion system of the coal-tar middle oil component of a kind of raw gas and carbonaceous particles and method |
| CN103965968B (en) * | 2014-05-22 | 2016-01-20 | 哈尔滨工业大学 | A kind of powder coal gasification furnace with raise steam device |
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