CN1478870A - High sulfur coal partly gasification predesulfur and high temperature sulfur fixation process and equipment - Google Patents
High sulfur coal partly gasification predesulfur and high temperature sulfur fixation process and equipment Download PDFInfo
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- CN1478870A CN1478870A CNA031467652A CN03146765A CN1478870A CN 1478870 A CN1478870 A CN 1478870A CN A031467652 A CNA031467652 A CN A031467652A CN 03146765 A CN03146765 A CN 03146765A CN 1478870 A CN1478870 A CN 1478870A
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Abstract
A process for partially gasifying, predesulfurizing and high-temp sulfur fixation and high-sulfur coal includes such steps as providing coal, gasifying and fixing sulfure to obtain low-sulfur coke powder and low heat value gas. Its apparatus features that the partial gasifying, predesulfurizing, powdering coal and removal of gas-state sulfide are performed in it.
Description
Technical field:
The invention belongs to the pre-desulfurization of a kind of coal partial gasification and high-temperature fixed sulfur technology and device.
Background technology:
Coal is main fossil energy, and its consumption constantly increases with the development of world economy, is the main fuel of generating, industrial power.The main mode of utilizing of coal is burning at present, because the sulphur content in the coal changes SO in coal combustion
2Arrange people's atmosphere with flue gas, severe contamination environment.Therefore reduce coal-fired SO
2Discharging obtains worldwide great attention.Control coal-fired SO
2The main method of discharging has two kinds: the one, and the source removes, and promptly removes sulphur in the coal to reduce the boiler oil sulphur content by physics and chemical process; The 2nd, desulfurization and flue gas desulfurization in the combustion promptly use sulphur-fixing agent to remove SO in the flue gas that burning generates
2The physics sulfur method is based on the different pyritic sulphurs that remove with the physico-chemical property of coal-based body of sulfurous iron ore in the coal, technical maturity, as gravity doctor treatment, flotation process, magnetic separation desulfurization etc., low to inlaying particle type pyrite removal efficiency, generally organosulfur there is not the effect of removing.Chemical desulfurization method such as heat alkali liquid lixiviation process, the desulfuration efficiency height, but the property effect of coal is bigger, and technology is also complicated, the desulphurization cost height, industrial being difficult to used.Fume desulphurization method, as flue gas lime/lime stone flue gas desulfurization technique, though can reach 90～95% desulfurization degrees, but this system's investment reaches 15%～20% (160～240 dollars/kw installation) of power plant's capital investment, cost of electricity-generating increases about 10%, and desulfurizing byproduct-contain grey gypsum becomes the secondary refuse.Pulverized coal boiler burns owing to the temperature height, the desulfuration in furnace weak effect, and existing flue gas desulfurization cost height is difficult to bear economically.
Summary of the invention:
It is low to the purpose of this invention is to provide a kind of desulphurization cost, the pre-desulfurization of high sulphur coal partial gasification and high-temperature fixed sulfur technology and device that sweetening effectiveness is good.Pre-desulfurization of partial gasification of the present invention and high-temperature fixed sulfur technology comprise the steps:
Raw coal at first is crushed to particle diameter＜10mm, then the moisture behind the brown coal drying less than 10% or the dried moisture of coal of other coal less than 5%, dry broken coal blows into vapourizing furnace by accounting for total air 3～10% air, the air and the water vapor mixture that enter with the vapourizing furnace bottom react, fluidized-bed gas speed 1.5～4.0m/s, gas-jet pipe gas speed keeps 7～15m/s, the Gas Jet flow accounts for 30～50% of total tolerance, temperature of reaction is controlled in 850～1050 ℃ of scopes, air consumption: 1.0～3.0Nm
3/ kg, steam consumption quantity: 0.3～0.5kg/kg, generation coal gas is carried coke powder secretly and is entered solid sulphur bed, the particle diameter of high-temperature desulfurization agent is 0.5～3.0mm, the quiet height of bed keeps 0.5～1.0 with Reaktionsofen diameter ratio, central gas stream pipe and sidewind pipe gas mobility 10～20m/s, wherein central gas stream pipe flow accounts for 50～60% of total coal gas amount, Gu the sulphur service temperature is controlled at 750～900 ℃, reaction back sulphur-fixing agent goes revivifier or stabilization reactions device to handle, and flows out coal gas of high temperature or the gas mixture of carrying coke powder secretly from solid sulphur bed top.
The coal of aforesaid other coal is long-flame coal, bituminous coal, poor (thin) coal, hard coal.
Aforesaid high-temperature desulfurization agent is Wingdale or unslaked lime.
In order to realize foregoing invention, designed special-purpose gasification installation, it is by vapourizing furnace, the air vapor inlet, gas exit, coal inlet is formed, it is characterized in that vapourizing furnace top is equipped with solid sulphur bed turbination air distribution plate, Gu sulphur bed turbination air distribution plate top is provided with sulphur-fixing agent import and sulphur-fixing agent upflow tube, Gu the vapourizing furnace on the sulphur bed turbination air distribution plate partly is solid sulphur bed, the bottom is a gasifier bed, gasifier bed inverted cone porous air distribution plate is housed in the bottom of gasifier bed, two air vapor inlets are equipped with in the below of shape air distribution plate, one is the side air steam-in, another air vapor inlet for communicating with the gas-jet pipe, top of gasification furnace has gas exit.
The inverted cone bus of aforesaid solid sulphur bed turbination air distribution plate and the angle of central shaft are the 15-45 degree, are provided with central gas stream pipe and four uniform sidewind pipes.
The inverted cone bus of aforesaid gasifier bed turbination air distribution plate and the angle of central shaft are the 30-45 degree.
Generation coal gas amount of the present invention is 1.6～4.0Nm
3/ kg, calorific value are 3000～5000kJ/Nm
3, the sulphur eduction rate is 60～80% in the coal.
Pre-desulfurization of high sulphur coal partial gasification of the present invention and high-temperature fixed sulfur process characteristic are as follows:
1. adopt the broken coal charging, product is low-sulfur coke powder and low heat value heating gas.
2. coal subject range is wide.
3. furnace high-temperature coal gas desulfurization, facility compact, energy-conservation.
4. heating gas of Chan Shenging and coke powder can replace heavy oil to be used for the accent lotus of roasting kiln.
5. desulphurization cost is low, and sweetening effectiveness is good
Embodiment:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of gasifying furnace device of the present invention
Fig. 2 is the structural representation of solid sulphur bed turbination air distribution plate in the gasifying furnace device of the present invention.Description of drawings:
Gasification furnace (12), air vapor entrance (1) (4), gas exit (9), coal feed point (5) form, it is characterized in that gasification furnace top is equipped with solid sulphur bed turbination air distribution plate (6), Gu sulphur bed turbination air distribution plate (6) top is provided with desulfurizing agent import (7) and desulfurizing agent overflow pipe (8), Gu the gasification furnace on the sulphur bed turbination air distribution plate (6) partly is solid sulphur bed, the bottom is gasifier bed, gasifier bed inverted cone porous air distribution plate (3) is housed in the bottom of gasifier bed, two air vapor entrances are equipped with in the below of gasifier bed inverted cone porous air distribution plate (3), one is side air steam inlet (4), another air vapor entrance (1) for communicating with gas jet pipe (2), top of gasification furnace has gas exit (9). Gu the inverted cone bus of sulphur bed turbination air distribution plate (6) and the angle of central shaft are the 15-45 degree, be provided with central gas stream pipe (10) and four uniform sidewind pipes (11).
Embodiment 1
With a kind of lean coal is raw material, and coal particle size is less than 8mm.Go into stove coal character and list in table 1, with the dried moisture of feed coal is 2%, enter gasifier bed from coal inlet (5), the dried feed coal blows into the gasifier bed of vapourizing furnace by accounting for total air 3% air from coal inlet (5), with air and the water vapor mixture reaction that the vapourizing furnace bottom enters, fluidized-bed gas speed 2.5m/s, gas-jet pipe (2) gas speed keeps 12m/s, the Gas Jet flow accounts for 40% of total tolerance, and temperature of reaction is controlled at 1050 ℃, air consumption: 2.0Nm
3/ kg, steam consumption quantity: 0.5kg/kg, generation coal gas is carried coke powder secretly and is entered solid sulphur bed, average diameter of particles is that the 1.5mm Wingdale enters solid sulphur bed from sweetening agent import (7), the quiet height of bed keeps 0.7 with Reaktionsofen diameter ratio, the gas mobility 20m/s of central gas stream pipe (10) and sidewind pipe (11), wherein central gas stream pipe (10) flow accounts for 60% of total coal gas amount, the solid sulphur service temperature of Wingdale is controlled at 850 ℃, reaction postcure solid goes revivifier or stabilization reactions device to handle, and flows out coal gas of high temperature or the gas mixture of carrying coke powder secretly from solid sulphur bed top gas exit (9).Generate coal gas amount 2.7Nm
3/ kg, calorific value 4000kJ/Nm
3, the sulphur eduction rate is 70% in the coal, efficiency of carbon conversion is 55%.Gaseous hydrogen sulfide decreasing ratio 95%.Be that system's desulfurization degree is 67%.
Embodiment 2
With a kind of brown coal is raw material, and coal particle size is less than 8mm.Go into stove coal character and list in table 1, with the dried moisture of feed coal is 10%, enter gasifier bed from coal inlet (5), the dried feed coal blows into the gasifier bed of vapourizing furnace by accounting for total air 3% air from coal inlet (5), with air and the water vapor mixture reaction that the vapourizing furnace bottom enters, fluidized-bed gas speed 2.5m/s, gas-jet pipe (2) gas speed keeps 12m/s, the Gas Jet flow accounts for 40% of total tolerance, and temperature of reaction is controlled at 1000 ℃, air consumption: 1.2Nm
3/ kg, steam consumption quantity: 0.3kg/kg, generation coal gas is carried coke powder secretly and is entered solid sulphur bed, average diameter of particles is that the 1.5mm Wingdale enters solid sulphur bed from sweetening agent import (7), the quiet height of bed keeps 0.7 with Reaktionsofen diameter ratio, the gas mobility 20m/s of central gas stream pipe (10) and sidewind pipe (11), wherein central gas stream pipe (10) flow accounts for 60% of total coal gas amount, the solid sulphur service temperature of Wingdale is controlled at 850 ℃, reaction postcure solid goes revivifier or stabilization reactions device to handle, and flows out coal gas of high temperature or the gas mixture of carrying coke powder secretly from solid sulphur bed top gas exit (9).Generate coal gas amount 1.6Nm
3/ kg, calorific value 4250kJ/Nm
3, the sulphur eduction rate is 74% in the coal, efficiency of carbon conversion is 60%.Gaseous hydrogen sulfide decreasing ratio 95%.Be that system's desulfurization degree is 70%.
Embodiment 3
With a kind of hard coal is raw material, and coal particle size is less than 8mm.Go into stove coal character and list in table 1, with the dried moisture of feed coal is 2%, enter gasifier bed from coal inlet (5), the dried feed coal blows into the gasifier bed of vapourizing furnace by accounting for total air 3% air from coal inlet (5), with air and the water vapor mixture reaction that the vapourizing furnace bottom enters, fluidized-bed gas speed 2.5m/s, gas-jet pipe (2) gas speed keeps 12m/s, the Gas Jet flow accounts for 40% of total tolerance, and temperature of reaction is controlled at 1050 ℃, air consumption: 1.8Nm
3/ kg, steam consumption quantity: 0.5kg/kg, generation coal gas is carried coke powder secretly and is entered solid sulphur bed, average diameter of particles is that the 1.5mm Wingdale enters solid sulphur bed from sweetening agent import (7), the quiet height of bed keeps 0.7 with Reaktionsofen diameter ratio, the gas mobility 20m/s of central gas stream pipe (10) and sidewind pipe (11), wherein central gas stream pipe (10) flow accounts for 60% of total coal gas amount, the solid sulphur service temperature of Wingdale is controlled at 850 ℃, reaction postcure solid goes revivifier or stabilization reactions device to handle, and flows out coal gas of high temperature or the gas mixture of carrying coke powder secretly from solid sulphur bed top gas exit (9).Generate coal gas amount 2.4Nm
3/ kg, calorific value 3870kJ/Nm
3, the sulphur eduction rate is 70% in the coal, efficiency of carbon conversion is 55%.Gaseous hydrogen sulfide decreasing ratio 95%.Be that system's desulfurization degree is 67%.
Table 1 coal sample work point, ultimate analysis
| Coal | Technical analysis w% | Ultimate analysis w% | ||||||
| ??Mad | ??Aad | ??Vad | ???Cad | ??Had | ??Nad | ??Oad | ????Stad | |
| Lean coal | ??0.74 | ??11.59 | ??14.07 | ???76.25 | ??3.45 | ??0.84 | ??4.28 | ????2.85 |
| Brown coal | ??13.50 | ??29.05 | ??32.21 | ???37.85 | ??3.27 | ??0.95 | ??13.71 | ????1.67 |
| Hard coal | ??1.54 | ??20.75 | ??7.31 | ???69.05 | ??2.93 | ??1.01 | ??3.00 | ????1.72 |
Claims (6)
1. pre-desulfurization of high sulphur coal partial gasification and high-temperature fixed sulfur technology is characterized in that comprising the steps:
Raw coal at first is crushed to particle diameter＜10mm, then the moisture behind the brown coal drying less than 10% or the dried moisture of coal of other coal less than 5%, dry broken coal blows into vapourizing furnace by accounting for total air 3～10% air, the air and the water vapor mixture that enter with the vapourizing furnace bottom react, fluidized-bed gas speed 1.5～4.0m/s, gas-jet pipe gas speed keeps 7～15m/s, the Gas Jet flow accounts for 30～50% of total tolerance, temperature of reaction is controlled in 850～1050 ℃ of scopes, air consumption: 1.0～3.0Nm
3/ kg, steam consumption quantity: 0.3～0.5kg/kg, generation coal gas is carried coke powder secretly and is entered solid sulphur bed, the particle diameter of high-temperature desulfurization agent is 0.5～3.0mm, the quiet height of bed keeps 0.5～1.0 with Reaktionsofen diameter ratio, central gas stream pipe and sidewind pipe gas mobility 10～20m/s, wherein central gas stream pipe flow accounts for 50～60% of total coal gas amount, Gu the sulphur service temperature is controlled at 750～900 ℃, reacted sulphur-fixing agent goes revivifier or stabilization reactions device to handle, and flows out coal gas of high temperature or the gas mixture of carrying coke powder secretly from solid sulphur bed top.
2. pre-desulfurization of a kind of high sulphur coal partial gasification as claimed in claim 1 and high-temperature fixed sulfur technology, the coal that it is characterized in that described other coal are long-flame coal, bituminous coal, poor (thin) coal, hard coal.
3. pre-desulfurization of a kind of high sulphur coal partial gasification as claimed in claim 1 and high-temperature fixed sulfur technology is characterized in that described high-temperature desulfurization agent is Wingdale or unslaked lime.
4. pre-desulfurization of a kind of high sulphur coal partial gasification as claimed in claim 1 or 2 and the used device of high-temperature fixed sulfur technology, it is characterized in that it is vapourizing furnace (12), air vapor inlet (1) (4), gas exit (9), coal inlet (5) is formed, it is characterized in that vapourizing furnace top is equipped with solid sulphur bed turbination air distribution plate (6), Gu sulphur bed turbination air distribution plate (6) top is provided with sweetening agent import (7) and sweetening agent upflow tube (8), Gu the vapourizing furnace on the sulphur bed turbination air distribution plate (6) partly is solid sulphur bed, the bottom is a gasifier bed, gasifier bed inverted cone porous air distribution plate (3) is housed in the bottom of gasifier bed, two air vapor inlets are equipped with in the below of gasifier bed inverted cone porous air distribution plate (3), one is side air steam-in (4), another air vapor inlet (1) for communicating with gas-jet pipe (2), top of gasification furnace has gas exit (9).
5. pre-desulfurization of a kind of high sulphur coal partial gasification as claimed in claim 4 and the used device of high-temperature fixed sulfur technology, it is characterized in that the inverted cone bus of described solid sulphur bed turbination air distribution plate (6) and the angle of central shaft are the 15-45 degree, be provided with central gas stream pipe (10) and four uniform sidewind pipes (11).
6. pre-desulfurization of a kind of high sulphur coal partial gasification as claimed in claim 4 and the used device of high-temperature fixed sulfur technology is characterized in that the inverted cone bus of described gasifier bed turbination air distribution plate (3) and the angle of central shaft are the 30-45 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146765 CN1198904C (en) | 2003-06-25 | 2003-06-25 | High sulfur coal partly gasification predesulfur and high temperature sulfur fixation process and equipment |
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|---|---|---|---|
| CN 03146765 CN1198904C (en) | 2003-06-25 | 2003-06-25 | High sulfur coal partly gasification predesulfur and high temperature sulfur fixation process and equipment |
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| CN1198904C CN1198904C (en) | 2005-04-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131477A (en) * | 2013-03-07 | 2013-06-05 | 中国天辰工程有限公司 | Novel brown coal gasification process |
| CN107541229A (en) * | 2016-06-24 | 2018-01-05 | 上海梅山钢铁股份有限公司 | A kind of coke and coking process of adapted superelevation sulphur content coking coal |
-
2003
- 2003-06-25 CN CN 03146765 patent/CN1198904C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131477A (en) * | 2013-03-07 | 2013-06-05 | 中国天辰工程有限公司 | Novel brown coal gasification process |
| CN107541229A (en) * | 2016-06-24 | 2018-01-05 | 上海梅山钢铁股份有限公司 | A kind of coke and coking process of adapted superelevation sulphur content coking coal |
| CN107541229B (en) * | 2016-06-24 | 2020-10-23 | 上海梅山钢铁股份有限公司 | Coke prepared by blending ultrahigh-sulfur coking coal and coking method |
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| CN1198904C (en) | 2005-04-27 |
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