CN101328433A - Method for preparing coal gas by using briquette - Google Patents
Method for preparing coal gas by using briquette Download PDFInfo
- Publication number
- CN101328433A CN101328433A CN 200810303255 CN200810303255A CN101328433A CN 101328433 A CN101328433 A CN 101328433A CN 200810303255 CN200810303255 CN 200810303255 CN 200810303255 A CN200810303255 A CN 200810303255A CN 101328433 A CN101328433 A CN 101328433A
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- Prior art keywords
- coal
- coal gas
- gasification
- layer
- gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003034 coal gas Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004484 Briquette Substances 0.000 title abstract 4
- 239000003245 coal Substances 0.000 claims abstract description 62
- 238000002309 gasification Methods 0.000 claims abstract description 41
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 abstract description 11
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000001354 calcination Methods 0.000 description 5
- 235000010215 titanium dioxide Nutrition 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 3
- 239000003830 anthracite Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000035924 thermogenesis Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to a method for preparing coal gas by using briquette coal, belonging to the field of coal gas industry. The invention solves the technical problem of providing the method for preparing the coal gas by the molded coal under the normal pressure, and the coal gas prepared by the method has higher heat value. The invention relates to a method for preparing coal gas by using briquette, wherein the thickness of each material layer is as follows: 300-500 mm of ash layer, 250-300 mm of gasification layer and 500-800 mm of fuel preparation layer; the gasifying agent is obtained by mixing water vapor and air with the oxygen volume content of 26-28%, and the saturation temperature of the gasifying agent is 65-67 ℃. The method for preparing the coal gas by using the briquette has the heat value of 6300-6700 Kj/Nm3The heat value of the coal gas is far higher than that of the coal gas prepared by the existing coal gas preparation method (about 5200-5500 Kj/Nm)3) And has wide application prospect.
Description
Technical field
The present invention relates to the method that moulded coal prepares coal gas, belong to the gas industry field.
Background technology
At present, industries such as domestic chemical fertilizer, machinery, metallurgy, building materials, and the enterprise's great majority that adopt fixed bed coal gas producer to produce coal gas use anthracite block coal or coke as gasified raw material.In the coal mining industry, along with the raising of mechanization degree, anthracite fine coal (coal dust) output is increasing, makes the anthracite block coal ratio that is fit to gasification more and more lower, and the imbalance between supply and demand day of lump coal is becoming tight.The fine coal direct gasification needs special-purpose powder coal gasification furnace, and most of enterprise produces coal gas at present and all adopts fixed bed coal gas producer, therefore, fine coal need be prepared into moulded coal earlier, then in fixed bed gasification.
Moulded coal is to be suppressed under external force by fine coal (coal dust) adding additives to form.Existing type coal gasification production coal gas craft flow process as shown in Figure 1; grieshoch is in the bottom of gas furnace; work to do preheating vaporized chemical and protection fire grate; vaporized chemical enters the gasification layer (comprising zone of oxidation and reducing zone) at middle part after by the grieshoch preheating, and a series of redox reaction here takes place, and (chemical reaction that zone of oxidation takes place is mainly: C+O
2→ CO
2+ Q, C+H
2O → CO+H
2-Q, 2CO+O
2→ 2CO
2+ Q; The chemical reaction that reducing zone takes place is mainly: CO
2+ C → CO-Q) obtains coal gas of high temperature, from the fuel preparation layer (comprise destructive distillation layer and drying layer) of the gasification layer coal gas of high temperature that comes through top, produce the destructive distillation desiccation, and obtaining a part of dry distillation gas, the upper space that the coal gas that the gasification layer comes and the dry distillation gas of fuel preparation layer are pooled to producer goes out the gas pipe discharge from stove.Go into the stove coal and pass through the different bed of materials from top to bottom, different chemical reactions takes place, become slag at last.Above-mentioned vaporized chemical is air and mixture of steam, and the water vapor and the air mixed that generally adopt boiler to add thermogenesis make, and the temperature of mixing the back vaporized chemical is temperature of saturation.The concrete add-on of vaporized chemical is calculated according to the moulded coal weight that adds and is got.
Grieshoch during existing type coal gasification, the gasification layer, the thickness range of fuel preparation layer is: grieshoch 200-300mm, gasification layer 150-200mm, fuel preparation layer 300-400mm, the temperature of saturation of vaporized chemical is 52-56 ℃, and (air in the used vaporized chemical is general air, be that the oxygen volume content is about 21% air), but (compare) easily efflorescence in producer during owing to type coal gasification with the lump coal gasification, make bed of material resistance increase in the stove, operational condition instability in the stove, be easy to occur inclined to one side stove, the black furnace or the undesired working of a furnace such as heat operation etc. make that the calorific value of coal gas of preparation is on the low side (to be about 5200～5500Kj/Nm
3), be difficult to reach enterprise's requirement.
Therefore, the caloric power of gas that how to improve type coal gasification becomes the technical problem that this area presses for solution at present.
Summary of the invention
Technical problem to be solved by this invention is the method that provides a kind of moulded coal to prepare coal gas at above-mentioned deficiency, and the caloric power of gas of this method preparation is higher.
Moulded coal of the present invention prepares the method for coal gas, and each bed thickness is during its type coal gasification: grieshoch 300～500mm, gasification layer 250～300mm, fuel preparation layer 500～800mm; Used vaporized chemical is that 26～28% air mixed gets by water vapor and oxygen volume content, and the temperature of saturation of vaporized chemical is 65～67 ℃.
Above-mentioned oxygen volume content is that 26～28% air is can be by oxygen and general air (being that the oxygen volume content is about 21% air) mixed.
Moulded coal of the present invention prepares the method for coal gas, and its typical process flow is identical with existing type coal gasification production coal gas craft flow process, as shown in Figure 1.
After moulded coal adds, along with the position of moulded coal in stove descends, temperature raises gradually, mechanical force during extrusion forming fades away, moulded coal is the cracked powder state that returns to easily, it is higher that moulded coal of the present invention prepares the fuel preparation layer of method of coal gas, facts have proved the rate of heating that can effectively reduce moulded coal like this, and the cracked amount of moulded coal is beneficial to vaporized chemical and air-flow is unobstructed thereby reduce.
Further, moulded coal of the present invention prepares the method for coal gas, and the temperature of its gasification layer can not surpass ash fusion point, otherwise can make the moulded coal slagging scorification, influences ventilation property in the stove; Its gasification layer temperature is preferably 1000～1150 ℃ (ash melting point is about 1250 ℃), but can not be lower than 950 ℃, otherwise, easily form cold operation, the caloric power of gas variation, even put out stove.Because the oxygen content in the vaporized chemical is higher than the oxygen level when making vaporized chemical with general air, redox reaction is comparatively violent in the stove, the zone of oxidation temperature is higher, should be specifically noted that the thickness that keeps reducing zone in the operation, its topmost method keeps air permeability and good in the stove, the temperature of reducing zone controlled well simultaneously (is promptly controlled the temperature of reducing zone, when the reducing zone temperature is too high, need to reduce furnace temperature, the reducing zone temperature is crossed when hanging down, need the rising furnace temperature), so that the heat that zone of oxidation produces is rationally utilized, so just can produce coal gas preferably.Furnace temperature mainly is to regulate by regulating temperature of saturation, and temperature of saturation raises, and total quantity of steam of sending in the stove increases, and temperature reduces in the stove, and vice versa.
Further, in order in time to understand each bed depth and variation in the stove, need survey pin, survey pin in the gas furnace operation is to utilize the drill rod of certain-length to insert each bed of material of producer from the furnace roof fire exploring hole, and stops certain hour, takes out drill rod then, judge the height of each bed of material according to the color on the drill rod, burn red position on the drill rod and be the gasification layer, its length is the gasification layer thickness, and the upper-lower position of the unconspicuous i.e. gasification of all the other colors layer is respectively fuel preparation layer and grieshoch on the pricker.But the survey pin frequency is too high, can produce interference to the bed of material and material, is unfavorable for the stable of the bed of material.In order to reduce interference to the bed of material and material, be beneficial to the stable of the bed of material, the survey pin frequency is preferably per 1.5～2h mensuration once under the interior standard state of stove, and most preferably every 2h measures once.When the working of a furnace is undesired with the survey pin method of gasification during lump coal with, promptly plug in pricker as required in good time and be beneficial in time adjust and handle.
Moulded coal of the present invention prepares the method for coal gas, and its beneficial effect is: the caloric power of gas of its preparation is at 6300-6700Kj/Nm
3, the calorific value for preparing the prepared coal gas of coal gas method far above existing moulded coal (is about 5200～5500Kj/Nm
3), make fine coal replace lump coal to prepare high heating value gas and become a reality; Alleviated the degree in short supply in lump coal market greatly; The moulded coal reaction is more thorough, has improved the heat utilization efficiency of coal for gasification, has positive effect for the industry that with coal gas is fuel, has broad application prospects.
Description of drawings
Fig. 1 is existing type coal gasification production coal gas craft schema.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described.
The method that embodiment 1 usefulness moulded coal of the present invention prepares coal gas prepares coal gas
Each bed thickness is during type coal gasification: grieshoch 300mm, gasification layer 250mm, fuel preparation layer 500mm; Used vaporized chemical is that 26% air mixed gets by water vapor and oxygen volume content, and the temperature of saturation of vaporized chemical is 65 ℃; The every 2h of survey pin frequency once, gasification layer temperature is 1000 ℃.
After measured, the calorific value of gained coal gas is 6300Kj/Nm
3
The method that embodiment 2 usefulness moulded coal of the present invention prepares coal gas prepares coal gas
Each bed thickness is during type coal gasification: grieshoch 400mm, gasification layer 280mm, fuel preparation layer 650mm; Used vaporized chemical is that 27% air mixed gets by water vapor and oxygen volume content, and the temperature of saturation of vaporized chemical is 66 ℃; The every 2h of survey pin frequency once, gasification layer temperature is 1100 ℃.
After measured, the calorific value of gained coal gas is 6500Kj/Nm
3
The method that embodiment 3 usefulness moulded coal of the present invention prepares coal gas prepares coal gas
Each bed thickness is during type coal gasification: grieshoch 500mm, gasification layer 300mm, fuel preparation layer 800mm; Used vaporized chemical is that 28% air mixed gets by water vapor and oxygen volume content, and the temperature of saturation of vaporized chemical is 67 ℃; The every 2h of survey pin frequency once, gasification layer temperature is 1050～1150 ℃.
After measured, the calorific value of gained coal gas is reached for 6700Kj/Nm
3
The method that test example 1 usefulness moulded coal of the present invention prepares coal gas prepares the coal gas titanium white calcining
Prepare the coal gas titanium white calcining of coal gas method preparation because caloric power of gas is not enough with existing moulded coal, Ti0 per ton
2Need to add in addition the about 46Kg of diesel oil, the coal gas for preparing with embodiment 1,2,3 is titanium white calcining directly, and diesel-fuel consumption reduces to 0.
Prepare the coal gas of the method preparation of coal gas as can be seen by moulded coal of the present invention from embodiment 1～3, its calorific value can reach 6700Kj/Nm
3More than, the calorific value for preparing the prepared coal gas of coal gas method far above existing moulded coal (is about 5200～5500Kj/Nm
3).As can be seen with the direct titanium white calcining of the coal gas of embodiment 1,2,3 preparation, simplified the titanium dioxide calcination process from test example 1.
Claims (4)
1. moulded coal prepares the method for coal gas, it is characterized in that: each bed thickness is during type coal gasification: grieshoch 300～500mm, gasification layer 250～300mm, fuel preparation layer 500～800mm; Used vaporized chemical is that 26～28% air mixed gets by water vapor and oxygen volume content, and the temperature of saturation of vaporized chemical is 65～67 ℃.
2. moulded coal according to claim 1 prepares the method for coal gas, it is characterized in that: also carry out survey pin in the type coal gasification process, the survey pin frequency is that per 1.5～2h measures once.
3. moulded coal according to claim 2 prepares the method for coal gas, it is characterized in that: the survey pin frequency during type coal gasification is that every 2h measures once.
4. moulded coal according to claim 1 prepares the method for coal gas, it is characterized in that: the temperature of gasification layer is 1000～1150 ℃ during type coal gasification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810303255 CN101328433B (en) | 2008-07-31 | 2008-07-31 | Method for preparing coal gas from molded coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810303255 CN101328433B (en) | 2008-07-31 | 2008-07-31 | Method for preparing coal gas from molded coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101328433A true CN101328433A (en) | 2008-12-24 |
| CN101328433B CN101328433B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810303255 Active CN101328433B (en) | 2008-07-31 | 2008-07-31 | Method for preparing coal gas from molded coal |
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| Country | Link |
|---|---|
| CN (1) | CN101328433B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974349A (en) * | 2010-08-09 | 2011-02-16 | 高邮市林源科技开发有限公司 | Method for preventing generating ash erosion in process of gasifying low ash fusion point biomass in fixed bed |
| CN102796568A (en) * | 2012-09-06 | 2012-11-28 | 刘宗礼 | Device and technology for producing blau-gas and carbon monoxide |
| CN109054898A (en) * | 2018-09-05 | 2018-12-21 | 汉源四环锌锗科技有限公司 | A kind of gas generator production technology |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288293A (en) * | 1980-04-14 | 1981-09-08 | Fmc Corporation | Form coke production with recovery of medium BTU gas |
| DE3347554C2 (en) * | 1983-05-18 | 1986-08-07 | Pka Pyrolyse Kraftanlagen Gmbh, 7080 Aalen | Process for obtaining usable gas from waste by pyrolysis and apparatus for carrying out the process |
| DE69324266T2 (en) * | 1993-01-19 | 1999-07-08 | Dynecology Inc | FUEL PELLETS OR BRIQUETTES MADE FROM SEWAGE SLUDGE AND COMBUSTIBLE SOLID WASTE |
| EP0839893A1 (en) * | 1996-10-31 | 1998-05-06 | von Görtz & Finger Techn. Entwicklungs Ges.m.b.H. | Wood gasifier with industrial coke filter |
| CN1142382C (en) * | 2001-08-02 | 2004-03-17 | 黄钟成 | Combustion technology and apparatus with coal for replacing oil |
| CN1132914C (en) * | 2002-05-29 | 2003-12-31 | 李德平 | Production process for making water-gas by using bitumite |
| JP2004275901A (en) * | 2003-03-17 | 2004-10-07 | Kurimoto Ltd | Pyrolytic gasification device for vegetable organic substance and power generation facility using pyrolytic gasification device |
| JP4325985B2 (en) * | 2003-06-17 | 2009-09-02 | エコ・エンジニヤリング株式会社 | Combustion gasification apparatus and method for combustion gasification |
-
2008
- 2008-07-31 CN CN 200810303255 patent/CN101328433B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974349A (en) * | 2010-08-09 | 2011-02-16 | 高邮市林源科技开发有限公司 | Method for preventing generating ash erosion in process of gasifying low ash fusion point biomass in fixed bed |
| CN101974349B (en) * | 2010-08-09 | 2015-05-27 | 高邮市林源科技开发有限公司 | Method for preventing generating ash erosion in process of gasifying low ash fusion point biomass in fixed bed |
| CN102796568A (en) * | 2012-09-06 | 2012-11-28 | 刘宗礼 | Device and technology for producing blau-gas and carbon monoxide |
| CN102796568B (en) * | 2012-09-06 | 2015-07-08 | 刘宗礼 | Device and technology for producing blau-gas and carbon monoxide |
| CN109054898A (en) * | 2018-09-05 | 2018-12-21 | 汉源四环锌锗科技有限公司 | A kind of gas generator production technology |
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| Publication number | Publication date |
|---|---|
| CN101328433B (en) | 2011-05-11 |
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