Background technology:
Coal gasification is to utilize vaporized chemical to change the organism of coal and destructive distillation product thereof such as semicoke, broken charcoal, coke the process of coal gas into to greatest extent always.Used vaporized chemical is water vapor, air or oxygen, hydrogen, and vaporized chemical is during by red-hot solid fuel layer, the free oxygen wherein or carbon in the fuel is converted into CO, H in conjunction with oxygen such as water vapour or carbonic acid gas or hydrogen
2Or CH
4Gas etc. flammable composition.Certainly other means of producing coal gas by coal also have high temperature carbonization, low-temperature pyrolysis, and the coal gas of destructive distillation gained is called destructive distillation gas, its gas yield far beyond gasification for low.The patent of current domestic and international industrialization gasification process and utilisation technology can be summarized as follows:
1. according to the difference of used vaporized chemical, producer gas is divided into:
1. air gas: the coal gas that generates as vaporized chemical with air.The nitrogen and a certain amount of CO and a spot of CO that wherein contain have an appointment 65% (volume fraction)
2And H
2, the coal gas net calorific value is 3762~4598KJ/m
3
2. mixed gas: the mixture with air and an amount of water vapor is the coal gas that vaporized chemical generates, and the coal gas net calorific value is 5016~6270KJ/m
3
3. water-gas: with the coal gas that water vapor generates as vaporized chemical, the coal gas net calorific value is 10032~11286KJ/m
3
4. semi-water gas: with the water vapor be main an amount of air or the oxygen-rich air of adding simultaneously as the prepared coal gas of vaporized chemical, the coal gas net calorific value is 11704~13376KJ/m
3
5. steam one oxycoal gas: industrial oxygen is infeeded producer gas generator, supply with the prepared coal gas of suitable water vapor simultaneously, the coal gas net calorific value is 10032~10450KJ/m
3
Several industrial gass composed as follows:
2. can be divided into external-heat, internal heat type, thermal barrier formula with heat transfer type.
3. can be divided into moving-bed gasification, ebullated bed gasification, entrained flow gasification, molten bath gasification with the situation of fuel in stove.
Coal gasification technological development direction and up-to-date patented technology are embodied in the following aspects both at home and abroad at present:
1. utilize oxygen to make vaporized chemical.
2. improve gas making pressure, pressure is brought up to 8.0~10.0MPa as the strange 100 type stoves in Shandong.
3. increase stove diameter and volume, improve per unit area yield tolerance.
4. increase feed coal subject range, especially develop fine coal gas making.
Generating is combined, development gas turbine, the generating of steam turbine compound cycle with producing inexpensive low-heat value gas.
6. utilize nuclear energy system gas, enlarge the energy source range, improve the utilization ratio of coal:
7. emthod of high-concentration coal-water slurry (adding dispersion agent) is done raw material, ash group ball deslagging.
8. catalytic gasification: under pressurized gasification medium situation, add catalyzer.
9. radiant heating, the quick coking gasification of fine coal.
Summary of the invention:
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists, and provide a kind of and adopt that the transformation efficiency height of brand new technical route, carbon, coal gas net calorific value are big, manufacturing C0 clean fuel gas method that the energy consumption that economizes on resources, coal gas purify easily.
The technical solution used in the present invention is: carbonate raw material, carbon and catalyzer grinding to 80 μ m are together tailed over<20%, or the grinding remix is even separately, make reaction material, with powdery or corning or make piece and send into reactor or Reaktionsofen, heatable catalytic gasification reaction under the secluding air condition, adjust gasification reaction temperature and pressure, temperature of reaction in 500 ℃~1100 ℃ scopes, reaction pressure at normal pressure to 5.0MPa, the reaction vapour is derived, and the vapour of derivation stores after purifying treatment is clean CO or liquefies; The mol ratio of above-mentioned carbonate and carbon is 1: 0.5~1.8, promptly by a carbonate CO
3 2-0.5~1.8 carbon atom of proportioning; Described catalyzer is Vanadium Pentoxide in FLAKES and salt of wormwood, perhaps ferric oxide and Repone K, the perhaps violent and cerium dioxide of naphthenic acid; It is as follows that catalyst consumption accounts for the per-cent of carbonate raw material, carbon and total catalyst weight: Vanadium Pentoxide in FLAKES and salt of wormwood sum 1.0%, perhaps ferric oxide and Repone K sum 3.5%, perhaps manganese naphthenate and cerium dioxide sum 1.5%.
The waste residue of discharging partly can be used as the cement raw mix proportioning raw material or makes material of construction or supply metallurgy, and the part waste residue is as gas-purification agent recycle, and waste heat is through heat exchange preheating heat supply air and preheating reaction raw materials.
Above-mentioned under the air-isolation condition heatable catalytic gasification reaction, refer to not add gasifying mediums such as air, steam, hydrogen, former reactor or reaction furnace air are heated and discharge or extract out.
Carbonate in above-mentioned refers to wagnerite (MgCO
3), spathic iron ore (FeCO
3), water chestnut (soft) manganese stone (MnCO
3), rhombspar (CaMg (CO
3)
2), Wingdale (CaCO
3), soda ash (Na
2CO
3) and the compound of other carbon containing acid group in one or more.
Carbon in above-mentioned refers to one or more in coal and destructive distillation product, graphite, charcoal, bamboo charcoal and other vegetation charcoal.Coal carbonization product such as semicoke, broken charcoal, coke.
Catalyzer in above-mentioned refers to potassium, sodium, lithium, caesium, nickel, titanium, platinum, palladium, rhodium, osmium, gallium, iridium, vanadium, tungsten, iron, aluminium, chromium, strontium, zirconium, cobalt, cerium, lanthanum, manganese, copper, the muriate of zinc, bromide, sulfide, vitriol, oxymuriate, vanadate, chromic salt, manganate, titanate, nitrite, nitrate, formate, acetate, salicylate, succinate, Citrate trianion, tartrate, naphthenate, soap, the oil hydrochlorate, carbonate, in phosphoric acid salt and oxide compound and other complex compound one or more.
The invention solves following technical problem is: 1. selection of catalysts, and make " class homogeneous phase " catalyst system; 2. type of heating and reactor (stove); 3. the selection of temperature and pressure and control; 4. explosion-proof; 5. UTILIZATION OF VESIDUAL HEAT IN and waste residue utilization; 6. Bi Yao after measure; 7. purify the storage or the liquefaction of CO combustion gas.
We prove through repetition test for many years: but we produce clean CO combustion gas with carbonate minerals and carbon catalytic gasification, the transformation efficiency of carbon almost can reach 100% in the fuel, and a fuel " C " can produce two " CO ", and one of them CO derives from the carbon in the carbonate.Promptly 1 kilogram of pure carbon " C " can produce 4.66 kilograms " CO " in theory.1 kilogram of " C " 34067KJ of its Lower heat value can produce combustion gas " CO " 47085KJ (1 kilogram of CO Lower heat value 10104KJ), and the combustion gas of generation " CO " calorific value increases about 38.21% than fuel " C is solid " calorific value.
Advantage of the present invention and unusual effect:
1. innovate industry and domestic gas manufacturing technology, adopted the brand-new technology route of " carbonate and charcoal are raw material " reaction.
2. utilize the carbon in the carbonate minerals, and greatly improved the transformation efficiency of fuel " carbon ".The present invention's 1 kilogram of pure carbon in theory can produce 4.66 kilograms of carbon monoxide, and conventional art in theory 1 kilogram of pure carbon all be converted into CO and only can produce 2.33 kilograms of carbon monoxide in theory.Its advantage is expressed as follows with three kinds of oxidation reaction of carbon:
(a)C+O
2=CO
2+409(KJ/mo?l) 2C+O
2=2CO+246(KJ/mol)
(b)C+CO
2=2CO-162(KJ/mol)
(c)2CO+O
2=2CO
2+571(KJ/mol)
3. adopted functional catalysis technique to reduce reaction activity, the generation of selectivity catalysis CO impels reaction MCO
3+ C=MO+2CO and CO
2+ C=2CO is carrying out than suitable jasmine under the less energy-consumption.
4. made full use of " balance decomposition pressure " characteristic of carbonate minerals, and, promoted MCO by katalysis
3The carrying out of+C → MO+2CO reaction significantly reduced the branch heat of desorption of carbonate minerals, saved energy consumption.
5. utilized waste heat preheating heat supply air and reaction material, further saved energy consumption, and can make full use of waste residue as building materials or metallurgical raw material.
6. coal gas purifies easily, and (as being raw material with Wingdale and coal, waste residue is mainly CaO, adds water CaO+H can to utilize reacted waste residue purification
2O=Ca (OH)
2, vapour is by milk of lime Ca (OH)
2+ CO
2=CaCO
3+ H
2O Ca (OH)
2+ H
2S=CaS+2H
2O), can produce clean high-purity " CO " combustion gas.
Embodiment:
Carbonate raw material, carbon and catalyzer grinding to 80 μ m are together tailed over<20%; or the grinding remix is even separately; make reaction material; with powdery or corning or make piece and send into reactor or Reaktionsofen; (promptly do not add gasifying mediums such as air, steam, hydrogen at secluding air; air is heated and discharges or extract out in the former reactor) heatable catalytic gasification reaction under the condition, the suitable radiation heating catalytic gasification that adopts of wherein block reaction material.Look raw material and technology controlling and process and require to adjust gasification reaction temperature and pressure (temperature of reaction in 500 ℃~1100 ℃ scopes, reaction pressure preferred to 5.0MPa) at normal pressure.The reaction vapour is derived.The vapour of deriving stores after purifying treatment is clean CO or liquefies.The waste residue of discharging partly can be used as the cement raw mix proportioning raw material or makes material of construction or supply metallurgy, and the part waste residue is as gas-purification agent recycle, and waste heat is through heat exchange preheating heat supply air and preheating reaction raw materials.
Know-why of the present invention is: utilize under certain temperature and pressure condition carbonate and charcoal reaction to generate the CO of CO and carbonate decomposition
2Generate CO with the C reaction, and utilize merit acyl catalyzer to reduce reaction activity, the generation of selectivity catalysis CO.Its main chemical reactions equation is as follows:
MCO
3+C=MO+2CO………………(1)
MCO
3=MO+CO
2…………………(2)
CO
2+C=2CO……………………(3)
M in the reaction formula represents Ca, Mg, Mn, Fe and other metal ion.
Embodiment 1. got wagnerite and coke mol ratio 1: 1, add common grinding to 80 μ m such as gross weight 1.0% catalyzer Vanadium Pentoxide in FLAKES and salt of wormwood and tail over 0.6%, secluding air is gasification reaction under 650 ℃, 0.2MPa air pressure, the reaction vapour is derived, the transformation efficiency 99.99% of fuel carbon, purify back CO content 99.9% with milk of lime, Lower heat value is 12628KJ/m
3
Embodiment 2. gets Wingdale and common grinding to 80 μ m such as hard coal mol ratio 1: 1, interpolation gross weight 3.5% catalyzer ferric oxide and Repone K tail over 0.3%, secluding air is gasification reaction under 900 ℃, normal pressure, the reaction vapour is derived, the transformation efficiency 99.8% of fuel carbon, purifying back coal gas volume ratio with milk of lime is CO 94.3%, H
24.6%, CH
40.7%, H
2S 0.0%, and Lower heat value is 12638KJ/m
3
Embodiment 3. got spathic iron ore and coke mol ratio 1: 1.3, add 1.5% catalyzer manganese naphthenate and cerium dioxide etc., separately grinding to 80 μ m tail over<2%, mix and be pressed into piece, secluding air is gasification reaction under 850 ℃, 0.4MPa air pressure, vapour is derived, and CO content 99.9%, Lower heat value are 12623KJ/m after purifying with milk of lime
3, waste residue is a sponge iron, degree of metalization 99.3% can be used for steel-making etc.