CN107178351A - Underground coal gasification ignition agent and application thereof - Google Patents
Underground coal gasification ignition agent and application thereof Download PDFInfo
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- CN107178351A CN107178351A CN201710547018.7A CN201710547018A CN107178351A CN 107178351 A CN107178351 A CN 107178351A CN 201710547018 A CN201710547018 A CN 201710547018A CN 107178351 A CN107178351 A CN 107178351A
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- igniting agent
- coal gasification
- underground coal
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- 239000003245 coal Substances 0.000 title claims abstract description 98
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 95
- 238000002309 gasification Methods 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 239000004014 plasticizer Substances 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 32
- 229910052708 sodium Inorganic materials 0.000 claims description 31
- 239000011734 sodium Substances 0.000 claims description 31
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- 238000005553 drilling Methods 0.000 claims description 18
- 229920001220 nitrocellulos Polymers 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 16
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 13
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 13
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical group [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 12
- 239000012188 paraffin wax Substances 0.000 claims description 12
- -1 coagulator Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 239000002671 adjuvant Substances 0.000 claims description 10
- 229910052783 alkali metal Inorganic materials 0.000 claims description 10
- 150000001340 alkali metals Chemical class 0.000 claims description 10
- 230000002269 spontaneous effect Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 6
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 claims description 6
- 235000011092 calcium acetate Nutrition 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 4
- 229920001249 ethyl cellulose Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 239000001639 calcium acetate Substances 0.000 claims description 3
- 229960005147 calcium acetate Drugs 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 claims description 3
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 3
- 239000001856 Ethyl cellulose Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 19
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract 2
- 239000000701 coagulant Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 235000015424 sodium Nutrition 0.000 description 49
- 239000007789 gas Substances 0.000 description 34
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 25
- 229910052760 oxygen Inorganic materials 0.000 description 25
- 239000001301 oxygen Substances 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 22
- 238000003756 stirring Methods 0.000 description 16
- 238000004458 analytical method Methods 0.000 description 12
- 238000007711 solidification Methods 0.000 description 12
- 230000008023 solidification Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 239000003643 water by type Substances 0.000 description 10
- 239000013078 crystal Substances 0.000 description 9
- 150000001298 alcohols Chemical class 0.000 description 6
- 239000003518 caustics Substances 0.000 description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 5
- 239000000571 coke Substances 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004323 potassium nitrate Substances 0.000 description 3
- 235000010333 potassium nitrate Nutrition 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 125000005157 alkyl carboxy group Chemical group 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- LVEGNRYEXNXVGQ-UHFFFAOYSA-N chloric acid;potassium Chemical compound [K].OCl(=O)=O LVEGNRYEXNXVGQ-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- DNHVXYDGZKWYNU-UHFFFAOYSA-N lead;hydrate Chemical compound O.[Pb] DNHVXYDGZKWYNU-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention provides an underground coal gasification ignition agent and application thereof. The coal underground gasification ignition agent comprises the following components: the composite fuel comprises a base fuel, a coagulant, a catalyst, a combustion improver, an oxidant, a binder, a plasticizer and a stabilizer, wherein the mass ratio of the components is (40-80): (1-15): (0.05-3): (2-30): (4-20): (2-20): (2.5-18): (0.5-15). The ignition agent provided by the invention has the advantages of easily available raw materials and low cost; the ignition performance is excellent, the heat value is high, the coal bed in contact with the ignition device can be quickly ignited, and the ignition success rate is improved; the plastic is strong, the hardness is moderate, and the plastic can be put into drill holes with different apertures to participate in the ignition process; the solid state is always kept in the combustion process, and the heat release is stable and concentrated; the combustion time is long, the smoke and the residue are less, the combustion product is non-toxic and does not pollute underground water, the ignition effect is enhanced, and meanwhile, the energy-saving and environment-friendly advantages are achieved.
Description
Technical field
The present invention relates to coal underground gasification technology field, in particular to a kind of underground coal gasification(UCG) igniting agent and
It is applied.
Background technology
In without well formula Underground Coal Gasification Process, during firepower insertion gasification tunnel, first have to coal in the blind hole of deep
Layer is lighted.The methods such as existing coke igniting, electric ignition have the shortcomings of ignition process is complicated, operation difficulty is big.For example exist
In coke ignition process, if the red-hot coal of input or the thermal discharge of coke are not enough to offset the absorption including water evaporation
Heat, frequently can lead to loss of ignition, and substantial amounts of coal and coke may block drilling, influence ignition process again,
Also increase the resistance of foot of hole simultaneously, add operating cost；During electric ignition, because a large amount of water are contained in coal seam
Point, it is easily caused igniter short circuit.For deep fractures, because drilling depth is big, underground water etc. it is various it is unfavorable because
The presence of element, many difficulties are brought to coal seam igniting.
The content of the invention
In consideration of it, the present invention proposes a kind of underground coal gasification(UCG) igniting agent and its application, it is intended to solve existing deep and contain
The problem of water coal seam is difficult to light.
On one side, the present invention proposes a kind of underground coal gasification(UCG) igniting agent, and the igniting agent includes following components：Matrix
Fuel, coagulator, catalyst, combustion adjuvant, oxidant, binding agent, plasticizer and stabilizer, wherein, the mass ratio of each component is
(40~80)：(1~15)：(0.05~3)：(2~30)：(4~20)：(2~20)：(2.5~18)：(0.5~15).
Further, in above-mentioned underground coal gasification(UCG) igniting agent, including following components：Matrix fuel, coagulator, catalysis
Agent, combustion adjuvant, oxidant, binding agent, plasticizer and stabilizer, wherein, the mass ratio of each component is (50~70)：(2~10)：
(0.1~3)：(3~25)：(5~15)：(3~15)：(3~15)：(1~10).
Further, in above-mentioned underground coal gasification(UCG) igniting agent, described matrix fuel is at least one in methanol and ethanol
Kind.
Further, in above-mentioned underground coal gasification(UCG) igniting agent, the coagulator is higher fatty acids, alkylcarboxy ethyl
At least one of cellulose, stearic acid, calcium acetate and nitrocotton；The catalyst is sodium alkoxide class；The combustion adjuvant be magnesium powder,
At least one of aluminium powder, carbon dust and high molecular polymer.
Further, in above-mentioned underground coal gasification(UCG) igniting agent, the catalyst be in sodium methoxide and caustic alcohol at least
It is a kind of.
Further, in above-mentioned underground coal gasification(UCG) igniting agent, the oxidant is chlorate, perchlorate and nitrate
At least one of.
Further, in above-mentioned underground coal gasification(UCG) igniting agent, the binding agent is nitrocotton, and the plasticizer is stone
Wax, the stabilizer is sodium thiosulfate.
The igniting agent that the present invention is provided, raw material is easy to get, with low cost；Ignition performance is excellent, and calorific value is high, can light rapidly with
The coal seam being in contact, improve ignition success rate；Its plasticity is moderate compared with strong, hardness, can deliver the drilling into different pore size
Middle participation ignition process；Solid state is remained in combustion process, thermal discharge is stable and concentrates；And its burning time length, cigarette
Less, residue is few, the nontoxic not polluted underground water of combustion product, has the advantages that energy-conserving and environment-protective while enhancing ignition results.
On the other hand, the application the invention also provides a kind of igniting agent in underground coal gasification(UCG), this application include with
Lower step：Igniting agent is added into the drilling in the coal seam of pending gasification first, alkali metal is then added；The alkali metal and ground
Heat lead fire agent is released in spontaneous combustion after lower water contact, and igniter burning releases heat and lights coal seam.
Further, in application of the above-mentioned igniting agent in underground coal gasification(UCG), when carbon dioxide contains in outlet pipe
When amount reaches the first preset value, coal seam is ignited；When calorific value of gas reaches the second preset value, coal seam is lighted a fire successfully.
Further, in application of the above-mentioned igniting agent in underground coal gasification(UCG), first preset value is 10%, described
Second preset value is 4MJ/Nm3。
During due to carrying out igniting operation using the igniting agent that provides of the present invention, it is relatively low to the igniting environmental requirement in coal seam,
It is also inflammable in water, it is adaptable to the aqueous coal seam no-shaft underground gasification furnace igniting in deep, igniting agent has been widened in underground coal gasification(UCG)
The scope of application in igniting.
Embodiment
In order to further appreciate that the present invention, the preferred embodiments of the invention are described with reference to embodiment, but
It is it should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention rather than to patent requirements of the present invention
Limitation.
The invention provides a kind of underground coal gasification(UCG) igniting agent, the igniting agent includes following components：Matrix fuel, solidification
Agent, catalyst, combustion adjuvant, oxidant, binding agent, plasticizer and stabilizer, wherein, the mass ratio of each component is (40~80)：
(1~15)：(0.05~3)：(2~30)：(4~20)：(2~20)：(2.5~18)：(0.5~15).Preferably, each component
Consumption can be：Matrix fuel (50~70) part, coagulator (2~10) part, catalyst (0.1~3) part, combustion adjuvant (3~25)
Part, oxidant (5~15) part, binding agent (3~15) part, plasticizer (3~15) part and stabilizer (1~10) part.
Matrix fuel is selected from methanol, ethanol or their mixture.
Coagulator in higher fatty acids, alkylcarboxy ethyl cellulose, stearic acid, calcium acetate and nitrocotton at least
It is a kind of.
Catalyst is selected from sodium alkoxide class, is preferably selected from sodium methoxide, caustic alcohol or their mixture.
Combustion adjuvant can be selected from least one of magnesium powder, aluminium powder, carbon dust and high molecular polymer.Such as high molecular polymerization
Thing can be environmentally friendly family macromolecule polymer smokeless, tasteless after the burning such as polyethylene.
Oxidant is selected from least one of chlorate, perchlorate and nitrate.For example, oxidant can be chloric acid
Potassium, potassium hyperchlorate etc..
Binding agent is selected from nitrocotton, and plasticizer is selected from paraffin, and stabilizer is selected from sodium thiosulfate.
The preparation method for the underground coal gasification(UCG) igniting agent that the present invention is provided is as follows：(1) the part of matrix combustion into formula
Alkali metal is added in material, is stirred in the water bath with thermostatic control of (20~80) DEG C, reaction obtains cured product.Specifically, alkali metal can
Think lithium, sodium, potassium etc., it is preferable that alkali metal is metallic sodium, the mass ratio of metallic sodium and matrix fuel is 1：(1~4)；It is more excellent
The mass ratio of selection of land, metallic sodium and matrix fuel is 1：(2~3).Bath temperature can be preferably (30~70) DEG C, turn of stirring
Speed can turn/min for (120~180), and mixing time can be (2~3) min, and the solidification by alkali metal and matrix fuel is anti-
Should, the matrix fuel of safety and stability is can obtain, so as to ensure that the safety and explosion-proof performance of igniting agent.
(2) remaining matrix fuel in formula is taken again, the coagulator added into matrix fuel in formula, (20~80) DEG C
Water bath with thermostatic control under, be dissolved to solution in as clear as crystal shape, the cured product obtained in step (1) added under stirring,
Gradually solidify to solution and obtain translucent crystalline solid.Bath temperature can be preferably (30~70) DEG C, and the rotating speed of stirring can be
(70-130) turns/min, and mixing time can be (3-5) min.By the step, stable translucent crystallization can be further made
Body product.
(3) under (20~80) DEG C water bath with thermostatic control, formula is sequentially added in obtained translucent crystalline solid into step (2)
In stabilizer, oxidant, combustion adjuvant, catalyst, plasticizer and binding agent, stir, obtain product igniting agent.Water-bath temperature
Degree can be preferably (30~70) DEG C, and the rotating speed of stirring turns/min for (55-90), and mixing time can be (10-30) min.It is logical
The step is crossed, finally makes that hardness is moderate, plasticity is stronger, ignition process is participated in the drilling that different pore size can be delivered, and
The solid igniting agent being easily ignited.Cooled down when it is implemented, the product igniting agent that step (3) is obtained is stood, after after its solidification
Sealing is kept in dark place.
Present invention also offers application of the igniting agent in underground coal gasification(UCG), comprise the following steps：First to pending
Igniting agent is added in the drilling in the coal seam of gasification, alkali metal is then added；Heat is released in spontaneous combustion after alkali metal is contacted with underground water
Lead fire agent, igniter burning releases heat and lights coal seam.Specifically, put into the coal bed drilling to be gasified
Igniting agent, blasts pressure-air (3MPa≤air pressure ＜ 6MPa) or oxygen-enriched air (oxygen purity >=70%), will bore
Impurities purging in hole is removed so that coal seam, which is revealed, to be easy to contact with igniting agent；Then appropriate metallic sodium, metallic sodium are put into
Heat lead fire agent is released in spontaneous combustion after being contacted with underground water, and igniting agent can rapidly burn and release amount of heat by coal seam point
Combustion.Wherein, the addition of igniting agent can be 1500-2000g, and the input amount of metallic sodium is determined according to actual conditions, with underground
Liberated heat can be enough lead fire agent after water reaction.
In above-described embodiment, when the content of carbon dioxide in outlet pipe reaches the first preset value, coal seam is ignited；When
When calorific value of gas reaches the second preset value, coal seam is lighted a fire successfully.Preferably, the first preset value is 10%, and the second preset value is
4MJ/Nm3.When it is implemented, keep blasting pressure-air or oxygen-enriched air in whole ignition process, after coal seam is ignited,
Pressure-air or oxygen-enriched air as oxidant, will participate in the catalytic oxidation in coal seam.Meanwhile, after outlet pipe is to reaction
Gas is sampled analysis, when carbon dioxide in gas content is more than 10%, it is believed that coal seam has been ignited.Continue to blast high pressure
Air or oxygen-enriched air, when calorific value of gas reaches 4MJ/Nm3When, it is believed that coal seam is lighted a fire successfully, proceeds underground coal gasification(UCG)
Work.
The present invention is described in further details with reference to specific embodiment.
Embodiment 1
10g metallic sodiums are weighed, metallic sodium is added in 20g ethanol, the turning with 180r/min in 20 DEG C of water bath with thermostatic control
Speed stirring 180s, reaction obtains cured product；
30g ethanol is taken again, and 10g alkylcarboxy ethyl celluloses are added thereto, under 20 DEG C of water bath with thermostatic control, are dissolved to molten
Liquid is in as clear as crystal shape, and the solidification obtained in step (1) production is added in 300s, whipping process are stirred with 130r/min rotating speed
Thing, gradually solidifies to solution and obtains translucent crystalline solid；
Under 20 DEG C of waters bath with thermostatic control, 0.5g caustic alcohols, 17.5g magnesium are sequentially added in translucent crystalline solid obtained above
Powder, 6g potassium chlorate, 7g nitrocottons, 4g paraffin and 5g sodium thiosulfate, to obtain product igniting agent after 90r/min stirrings 600s.
In the drilling in the coal seam that the above-mentioned igniting agents of 2000g are put into pending gasification, pressure-air (3MPa≤air is blasted
Pressure ＜ 6MPa) so that coal seam is contacted with igniting agent；Then 20g metallic sodiums are put into, metallic sodium is seted off certainly after being contacted with underground water
Go out heat lead fire agent.
Continue to blast pressure-air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Pressure-air volume is (400-450) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited；Work as calorific value of gas
Reach 4MJ/Nm3, illustrate to light a fire successfully.
Embodiment 2
10g metallic sodiums are weighed, metallic sodium is added in 25g ethanol, the turning with 170r/min in 30 DEG C of water bath with thermostatic control
Speed stirring 170s, reaction obtains cured product；
30g ethanol is taken again, 7g higher fatty acids is added thereto, under 30 DEG C of water bath with thermostatic control, is dissolved to solution in limpid
Transparence, the cured product obtained in step (1) is added in 280s, whipping process are stirred with 120r/min rotating speed, extremely molten
Liquid, which gradually solidifies, obtains translucent crystalline solid；
Under 30 DEG C of waters bath with thermostatic control, 1g caustic alcohols, 15g aluminium powders, 7g are sequentially added in translucent crystalline solid obtained above
Potassium hyperchlorate, 5g nitrocottons, 7g paraffin and 3g sodium thiosulfate, to obtain product igniting agent after 85r/min stirrings 720s.
In the drilling in the coal seam that the above-mentioned igniting agents of 1900g are put into pending gasification, pressure-air (3MPa≤air is blasted
Pressure ＜ 6MPa) so that coal seam is contacted with igniting agent；Then 19g metallic sodiums are put into, metallic sodium is seted off certainly after being contacted with underground water
Go out heat lead fire agent.
Continue to blast pressure-air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Pressure-air volume is (380-430) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited；Work as calorific value of gas
Reach 4MJ/Nm3, illustrate to light a fire successfully.
Embodiment 3
6g metallic sodiums are weighed, metallic sodium are added in 24g ethanol, with 160r/min rotating speed in 40 DEG C of water bath with thermostatic control
160s is stirred, reaction obtains cured product；
36g ethanol is taken again, 5g stearic acid is added thereto, under 40 DEG C of water bath with thermostatic control, is dissolved to solution in as clear as crystal
Shape, the cured product that is obtained in 260s, whipping process in addition step (1) is being stirred with 110r/min rotating speed, to solution by
Gradually solidification obtains translucent crystalline solid；
Under 40 DEG C of waters bath with thermostatic control, 2g caustic alcohols, 8g carbon dusts and magnesium are sequentially added in translucent crystalline solid obtained above
Mixture, 5g potassium nitrate, 4g nitrocottons, 6g paraffin and the 10g sodium thiosulfate of powder, to be produced after 80r/min stirrings 750s
Thing igniting agent.
In the drilling in the coal seam that the above-mentioned igniting agents of 1800g are put into pending gasification, oxygen-enriched air (oxygen volume integral is blasted
Number >=70%) so that coal seam is contacted with igniting agent；Then 18g metallic sodiums are put into, spontaneous combustion is released after metallic sodium is contacted with underground water
Heat lead fire agent.
Continue to blast oxygen-enriched air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Oxygen-enriched air volume is (360-410) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited, and calorific value of gas reaches
To 4MJ/Nm3, coal seam is lighted a fire successfully.
Embodiment 4
8g metallic sodiums are weighed, metallic sodium are added in 24g ethanol, with 150r/min rotating speed in 50 DEG C of water bath with thermostatic control
150s is stirred, reaction obtains cured product；
46g ethanol is taken again, 2g calcium acetates are added thereto, under 50 DEG C of water bath with thermostatic control, is dissolved to solution in as clear as crystal
Shape, the cured product that is obtained in 240s, whipping process in addition step (1) is being stirred with 100r/min rotating speed, to solution by
Gradually solidification obtains translucent crystalline solid；
Under 50 DEG C of waters bath with thermostatic control, 3g caustic alcohols, 2g carbon dusts and aluminium are sequentially added in translucent crystalline solid obtained above
Mixture, 10g potassium chlorate, 6g nitrocottons, 3g paraffin and the 1g sodium thiosulfate of powder, to be produced after 75r/min stirrings 600s
Thing igniting agent.
In the drilling in the coal seam that the above-mentioned igniting agents of 1600g are put into pending gasification, oxygen-enriched air (oxygen volume integral is blasted
Number >=70%) so that coal seam is contacted with igniting agent；Then 16g metallic sodiums are put into, spontaneous combustion is released after metallic sodium is contacted with underground water
Heat lead fire agent.
Continue to blast oxygen-enriched air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Oxygen-enriched air volume is (320-370) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited, and calorific value of gas reaches
To 4MJ/Nm3, coal seam is lighted a fire successfully.
Embodiment 5
4g metallic sodiums are weighed, metallic sodium are added in 16g methanol, with 140r/min rotating speed in 60 DEG C of water bath with thermostatic control
140s is stirred, reaction obtains cured product；
34g methanol is taken again, and 9g alkylcarboxy ethyl celluloses are added thereto, under 60 DEG C of water bath with thermostatic control, are dissolved to molten
Liquid is in as clear as crystal shape, and the solidification obtained in step (1) production is added in 220s, whipping process are stirred with 90r/min rotating speed
Thing, gradually solidifies to solution and obtains translucent crystalline solid；
Under 60 DEG C of waters bath with thermostatic control, 2.5g sodium methoxides are sequentially added in translucent crystalline solid obtained above, 30g magnesium powders,
4g potassium chlorate, 7g nitrocottons, 3.5g paraffin and 3g sodium thiosulfate, to obtain product igniting agent after 70r/min stirrings 900s.
In the drilling in the coal seam that the above-mentioned igniting agents of 2000g are put into pending gasification, pressure-air (3MPa≤air is blasted
Pressure ＜ 6MPa) so that coal seam is contacted with igniting agent；Then 20g metallic sodiums are put into, metallic sodium is seted off certainly after being contacted with underground water
Go out heat lead fire agent.
Continue to blast pressure-air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Pressure-air volume is (400-450) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited；Work as calorific value of gas
Reach 4MJ/Nm3, illustrate to light a fire successfully.
Embodiment 6
5g metallic sodiums are weighed, metallic sodium are added in 15g methanol, with 130r/min rotating speed in 70 DEG C of water bath with thermostatic control
130s is stirred, reaction obtains cured product；
40g methanol is taken again, 8g higher fatty acids is added thereto, under 70 DEG C of water bath with thermostatic control, is dissolved to solution in limpid
Transparence, adds the cured product obtained in step (1), to solution in 200s, whipping process are stirred with 80r/min rotating speed
Gradually solidification obtains translucent crystalline solid；
Under 70 DEG C of waters bath with thermostatic control, 1.5g sodium methoxides are sequentially added in translucent crystalline solid obtained above, 12g aluminium powders,
6g potassium hyperchlorates, 5g nitrocottons, 15g paraffin and 5.5g sodium thiosulfate, to obtain product igniting after 60r/min stirrings 960s
Agent.
In the drilling in the coal seam that the above-mentioned igniting agents of 1900g are put into pending gasification, oxygen-enriched air (oxygen volume integral is blasted
Number >=70%) so that coal seam is contacted with igniting agent；Then 19g metallic sodiums are put into, spontaneous combustion is released after metallic sodium is contacted with underground water
Heat lead fire agent.
Continue to blast oxygen-enriched air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Oxygen-enriched air volume is (380-430) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited, and calorific value of gas reaches
To 4MJ/Nm3, coal seam is lighted a fire successfully.
Embodiment 7
7g metallic sodiums are weighed, metallic sodium are added in 21g methanol, with 170r/min rotating speed in 30 DEG C of water bath with thermostatic control
170s is stirred, reaction obtains cured product；
38g ethanol is taken again, 6g stearic acid is added thereto, under 30 DEG C of water bath with thermostatic control, is dissolved to solution in as clear as crystal
Shape, the cured product that is obtained in 280s, whipping process in addition step (1) is being stirred with 120r/min rotating speed, to solution by
Gradually solidification obtains translucent crystalline solid；
Under 30 DEG C of waters bath with thermostatic control, 1g sodium methoxides, 9g carbon dusts and magnesium are sequentially added in translucent crystalline solid obtained above
Mixture, 8g potassium nitrate, 3g nitrocottons, 6g paraffin and the 6g sodium thiosulfate of powder, to be produced after 85r/min stirrings 1080s
Thing igniting agent.
In the drilling in the coal seam that the above-mentioned igniting agents of 1800g are put into pending gasification, pressure-air (3MPa≤air is blasted
Pressure ＜ 6MPa) so that coal seam is contacted with igniting agent；Then 18g metallic sodiums are put into, metallic sodium is seted off certainly after being contacted with underground water
Go out heat lead fire agent.
Continue to blast pressure-air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Pressure-air volume is (360-410) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited；Work as calorific value of gas
Reach 4MJ/Nm3, illustrate to light a fire successfully.
Embodiment 8
5g metallic sodiums are weighed, metallic sodium are added in 15g methanol, with 120r/min rotating speed in 80 DEG C of water bath with thermostatic control
120s is stirred, reaction obtains cured product；
55g methanol is taken again, 3g calcium acetates are added thereto, under 80 DEG C of water bath with thermostatic control, is dissolved to solution in as clear as crystal
Shape, adds the cured product obtained in step (1), in 180s, whipping process are stirred with 70r/min rotating speed to solution gradually
Solidification obtains translucent crystalline solid；
Under 80 DEG C of waters bath with thermostatic control, sequentially add 0.5g sodium methoxides in translucent crystalline solid obtained above, 7g carbon dusts with
Mixture, 9g potassium chlorate, 15g nitrocottons, 3.5g paraffin and the 1g sodium thiosulfate of aluminium powder, to be obtained after 55r/min stirrings 1200s
To product igniting agent.
In the drilling in the coal seam that the above-mentioned igniting agents of 1600g are put into pending gasification, oxygen-enriched air (oxygen volume integral is blasted
Number >=70%) so that coal seam is contacted with igniting agent；Then 16g metallic sodiums are put into, spontaneous combustion is released after metallic sodium is contacted with underground water
Heat lead fire agent.
Continue to blast oxygen-enriched air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Oxygen-enriched air volume is (320-370) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited, and calorific value of gas reaches
To 4MJ/Nm3, coal seam is lighted a fire successfully.
Embodiment 9
10g metallic sodiums are weighed, in the mixture that metallic sodium is added to 10g methanol and ethanol, in 40 DEG C of water bath with thermostatic control
160s is stirred with 160r/min rotating speed, reaction obtains cured product；
The mixture of 30g methanol and ethanol is taken again, and 1g nitrocottons are added thereto, under 40 DEG C of water bath with thermostatic control, are dissolved to
Solution is in as clear as crystal shape, and the solidification obtained in step (1) is added in 260s, whipping process are stirred with 110r/min rotating speed
Product, gradually solidifies to solution and obtains translucent crystalline solid；
Under 40 DEG C of waters bath with thermostatic control, 0.1g caustic alcohols and sodium methoxide are sequentially added in translucent crystalline solid obtained above
Mixture, 3g polyethylene, 15g potassium nitrate, 2g nitrocottons, 2.5g paraffin and 0.5g sodium thiosulfate, is stirred with 80r/min
Product igniting agent is obtained after 1500s.
In the drilling in the coal seam that the above-mentioned igniting agents of 2000g are put into pending gasification, pressure-air (3MPa≤air is blasted
Pressure ＜ 6MPa) so that coal seam is contacted with igniting agent；Then 20g metallic sodiums are put into, metallic sodium is seted off certainly after being contacted with underground water
Go out heat lead fire agent.
Continue to blast pressure-air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Pressure-air volume is (400-450) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited；Work as calorific value of gas
Reach 4MJ/Nm3, illustrate to light a fire successfully.
Embodiment 10
15g metallic sodiums are weighed, metallic sodium is added in 30g ethanol, the turning with 150r/min in 50 DEG C of water bath with thermostatic control
Speed stirring 150s, reaction obtains cured product；
50g ethanol is taken again, 15g calcium acetates are added thereto, under 50 DEG C of water bath with thermostatic control, is dissolved to solution in as clear as crystal
Shape, the cured product that is obtained in 240s, whipping process in addition step (1) is being stirred with 100r/min rotating speed, to solution by
Gradually solidification obtains translucent crystalline solid；
Under 50 DEG C of waters bath with thermostatic control, 0.05g caustic alcohols, the poly- second of 25g are sequentially added in translucent crystalline solid obtained above
Alkene, the mixture of 20g potassium chlorate and potassium hyperchlorate, 20g nitrocottons, 18g paraffin and 15g sodium thiosulfate, are stirred with 75r/min
Product igniting agent is obtained after 1800s.
In the drilling in the coal seam that the above-mentioned igniting agents of 1500g are put into pending gasification, oxygen-enriched air (oxygen volume integral is blasted
Number >=70%) so that coal seam is contacted with igniting agent；Then 15g metallic sodiums are put into, spontaneous combustion is released after metallic sodium is contacted with underground water
Heat lead fire agent.
Continue to blast oxygen-enriched air, and the gas produced after outlet conduit is to reaction is sampled analysis, when what is blasted
Oxygen-enriched air volume is (300-350) Nm3When, carbon dioxide in gas content reaches 10%, and coal seam is ignited, and calorific value of gas reaches
To 4MJ/Nm3, coal seam is lighted a fire successfully.
Through analysis detection, the various performance parameters of the underground coal gasification(UCG) igniting agent provided in 1-10 of the embodiment of the present invention are such as
Following table：
As can be seen that igniting agent function admirable in the present invention, calorific value are high, burning velocity is fast and burning after residue it is few.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of underground coal gasification(UCG) igniting agent, it is characterised in that including following components：Matrix fuel, coagulator, catalyst,
Combustion adjuvant, oxidant, binding agent, plasticizer and stabilizer, wherein, the mass ratio of each component is (40~80)：(1~15)：
(0.05~3)：(2~30)：(4~20)：(2~20)：(2.5~18)：(0.5~15).
2. underground coal gasification(UCG) igniting agent according to claim 1, it is characterised in that including following components：Matrix fuel,
Coagulator, catalyst, combustion adjuvant, oxidant, binding agent, plasticizer and stabilizer, wherein, the mass ratio of each component for (50~
70)：(2~10)：(0.1~3)：(3~25)：(5~15)：(3~15)：(3~15)：(1~10).
3. underground coal gasification(UCG) igniting agent according to claim 1 or 2, it is characterised in that described matrix fuel is methanol
At least one of with ethanol.
4. underground coal gasification(UCG) igniting agent according to claim 1 or 2, it is characterised in that the coagulator is senior fat
At least one of fat acid, alkylcarboxy ethyl cellulose, stearic acid, calcium acetate and nitrocotton；The catalyst is sodium alkoxide class；
The combustion adjuvant is at least one of magnesium powder, aluminium powder, carbon dust and high molecular polymer.
5. underground coal gasification(UCG) igniting agent according to claim 4, it is characterised in that the catalyst is sodium methoxide and second
At least one of sodium alkoxide.
6. underground coal gasification(UCG) igniting agent according to claim 1 or 2, it is characterised in that the oxidant be chlorate,
At least one of perchlorate and nitrate.
7. underground coal gasification(UCG) igniting agent according to claim 1 or 2, it is characterised in that the binding agent is nitrocotton,
The plasticizer is paraffin, and the stabilizer is sodium thiosulfate.
8. application of the igniting agent according to any one of claim 1-7 in underground coal gasification(UCG), it is characterised in that bag
Include following steps：
Igniting agent is put into the drilling in the coal seam of pending gasification first, alkali metal is then added；
Heat lead fire agent is released in spontaneous combustion after the alkali metal is contacted with underground water, and igniter burning releases heat and by coal seam
Light.
9. application of the igniting agent according to claim 8 in underground coal gasification(UCG), it is characterised in that
When the content of carbon dioxide in outlet pipe reaches the first preset value, coal seam is ignited；
When calorific value of gas reaches the second preset value, coal seam is lighted a fire successfully.
10. application of the igniting agent according to claim 9 in underground coal gasification(UCG), it is characterised in that described first is pre-
If value is 10%, second preset value is 4MJ/Nm3。
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| CN111425179A (en) * | 2020-03-20 | 2020-07-17 | 北京国利衡清洁能源科技(集团)有限公司 | Novel ignition device and conveying system |
| CN112253076A (en) * | 2020-11-26 | 2021-01-22 | 福州大学 | Chemical mining method of underground pyrite |
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