CN115368943A - Coal water slurry gasification coal blending method - Google Patents
Coal water slurry gasification coal blending method Download PDFInfo
- Publication number
- CN115368943A CN115368943A CN202211130452.2A CN202211130452A CN115368943A CN 115368943 A CN115368943 A CN 115368943A CN 202211130452 A CN202211130452 A CN 202211130452A CN 115368943 A CN115368943 A CN 115368943A
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- China
- Prior art keywords
- coal
- ash
- fusion temperature
- low
- ash fusion
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- 239000003245 coal Substances 0.000 title claims abstract description 147
- 238000002156 mixing Methods 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002309 gasification Methods 0.000 title claims abstract description 25
- 239000002002 slurry Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000004927 fusion Effects 0.000 claims abstract description 33
- 238000004537 pulping Methods 0.000 claims abstract description 12
- 239000002956 ash Substances 0.000 claims description 43
- 238000002844 melting Methods 0.000 claims description 22
- 230000008018 melting Effects 0.000 claims description 22
- 239000010883 coal ash Substances 0.000 claims description 15
- 239000003250 coal slurry Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to the technical field of coal blending, in particular to a coal water slurry gasification coal blending method, which comprises the following steps: selecting high-ash fusion temperature coal meeting a high-temperature standard and low-ash fusion temperature coal meeting a low-temperature standard; uniformly mixing high-ash fusion temperature coal and low-ash fusion temperature coal according to a set proportion; the pulping concentration of coal which is difficult to be pulped is improved; the invention can improve the utilization rate of the high-ash fusion temperature coal, reduce the application cost of the low-ash fusion temperature coal, fully utilize the coal resources and effectively solve the technical problems of high coal blending cost and incapability of fully utilizing the high-ash fusion temperature coal and the low-ash fusion temperature coal in the prior art.
Description
Technical Field
The invention relates to the technical field of coal gasification and blending, in particular to a coal water slurry gasification and blending method.
Background
China is a world with large coal reserves and a world with large coal consumption as main energy, but the use of coal brings about a serious environmental pollution problem. The coal water slurry has great potential in industrial application as a novel environment-friendly fuel. The coal water slurry is a coal-based fluid fuel and gasification raw material consisting of coal, water and additives, can be used for combustion power generation or gas supply of industrial boilers, kilns and power station boilers, and can also be used for coal gasification production of chemical products such as synthetic ammonia, methanol, olefin, oil products, natural gas and the like.
The raw material coal used in coal blending comprises high-ash fusion temperature coal and low-ash fusion temperature coal, the cost of the former is relatively low, but the ash fusion temperature is high, and the raw material coal is economically and technically not suitable for the refractory brick water-coal-slurry pressurized gasifier with liquid slag discharge; although the coal supply system can be directly used, the coal supply system is concentrated in Shaanxi, inner Mongolia, gansu and other places, enterprises are difficult to purchase, the enterprise cost is high during long-distance conveying, the problem of shortage of regional and time-interval coal supply is obvious in meeting in extreme weather, price fluctuation is large, the national coal emergency supply guarantee difficulty is increased, and the uncertainty of coal markets is increased. How to fully utilize the high-ash fusion temperature coal and the low-ash fusion temperature coal to be matched to prepare the coal meeting the requirement of coal for coal water slurry gasification, fully reduce the coal blending cost and solve the technical problems needed to be solved by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a coal-water slurry gasification blending method, which is used to solve the technical problems of high coal blending cost and insufficient utilization of high ash fusion temperature coal and low ash fusion temperature coal in the prior art.
In order to realize the purpose, the coal water slurry gasification coal blending method provided by the invention adopts the following technical scheme:
a coal-water slurry gasification coal blending method comprises the following steps:
selecting high-ash fusion temperature coal meeting a high-temperature standard and low-ash fusion temperature coal meeting a low-temperature standard;
uniformly mixing high-ash fusion temperature coal and low-ash fusion temperature coal according to a set proportion;
and improving the pulping concentration of the blended coal to a set standard.
The coal water slurry gasification coal blending method provided by the invention has the beneficial effects that: by optimizing the coal blending, the coal ash melting temperature of high-ash melting temperature coal is obviously reduced, the coal using requirements of a coal water slurry and a pulverized coal pressurized gasification liquid slag removal furnace are met, the pulping concentration of coal difficult to form slurry is improved, the using requirement is better met, the utilization rate of the high-ash melting temperature coal can be improved, the application cost of the low-ash melting temperature coal can be reduced, the coal resources are fully utilized, and the technical problems that the coal blending cost is high, and the high-ash melting temperature coal and the low-ash melting temperature coal cannot be fully utilized in the prior art are effectively solved.
Further, the high temperature criterion is that FT is greater than 1500 ℃.
Further, the low temperature criterion is that FT is less than 1250 ℃.
Further, the setting standard of the pulping concentration is 60-62%.
Further, the blending proportion of the high-ash fusion temperature coal is 5-20%.
Further, the blending proportion of the low-ash fusion temperature coal is 80-85%.
Further, after blending coal, making the oxide component AL in the coal ash 2 O 3 /(CaO+Fe 2 O 3 )<0.8-1.0, and the acid-base ratio of the coal ash is ensured to be 0.9-1.2; the melting point temperature FT of the coal blending ash is 1150-1300 ℃; and the viscosity of the coal ash is 15 Pas-22 Pas at 1300-1350 ℃.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
A coal-water slurry gasification coal blending method comprises the following steps:
selecting high-ash fusion temperature coal meeting a high-temperature standard and low-ash fusion temperature coal meeting a low-temperature standard;
uniformly mixing high-ash fusion temperature coal and low-ash fusion temperature coal according to a set proportion;
and improving the pulping concentration of the blended coal to a set standard.
The coal water slurry gasification coal blending method provided by the invention has the beneficial effects that: by optimizing the coal blending, the coal ash melting temperature of high-ash melting temperature coal is obviously reduced, the coal using requirements of a coal water slurry and a pulverized coal pressurized gasification liquid slag removal furnace are met, the pulping concentration of coal difficult to form slurry is improved, the using requirement is better met, the utilization rate of the high-ash melting temperature coal can be improved, the application cost of the low-ash melting temperature coal can be reduced, the coal resources are fully utilized, and the technical problems that the coal blending cost is high, and the high-ash melting temperature coal and the low-ash melting temperature coal cannot be fully utilized in the prior art are effectively solved.
Specifically, the high temperature criterion is that FT is greater than 1500 ℃ and the low temperature criterion is that FT is less than 1250 ℃.
In this embodiment, the pulping consistency is set to 60-62%.
In addition, the blending proportion of the high-ash fusion temperature coal is 5-20%; the blending proportion of the low-ash fusion temperature coal is 80-85%.
After blending coal, the oxide component AL in the coal ash is obtained 2 O 3 /(CaO+Fe 2 O 3 )<0.8-1.0, and the acid-base ratio of the coal ash is ensured to be 0.9-1.2; the melting point temperature FT of the coal blending ash is 1150-1300 ℃; and the viscosity of the coal ash is 15 Pas-22 Pas at 1300-1350 ℃.
The invention aims to improve the utilization rate of coal resources, reasonably utilize the coal resources in different areas and reduce the coal blending cost; the high ash melting temperature coal (coal ash melting temperature is more than 1500 ℃) and elm forest coal (shenmu, elm yang, coal ash melting temperature is less than 1250 ℃) are mixed to reduce the ash melting temperature of the high ash melting temperature coal, simultaneously, the pulping concentration of the coal which is difficult to be pulped is effectively improved, the coal type of the coal water slurry pressurized gasification raw material is expanded, and therefore, the coal resource of the flat-topped mountain mining area is reasonably utilized.
The high ash melting point temperature generally means that the flow temperature FT of coal ash is more than 1500 ℃,35 percent of wooden sulfonate is added into 0.6 percent of dry coal;
when coal is specifically blended, conveying the coal according to the material level of the blending bin and the actual coal storage amount of the silo, taking out the coal in the corresponding silo by using a coal activating feeder arranged at the lower part of the silo, conveying the coal to a belt conveyor, metering the coal by using an electronic belt weigher, conveying the coal to the belt conveyor according to the coal blending proportion, removing iron by using an iron remover, and conveying the gasified raw coal to the gasified coal bin by using the belt conveyor;
the coal in the coal bunker is measured by the weighing feeder and then is sent into the coal mill. The coal mill is added with additives to improve the concentration and stability of the coal slurry and reduce the viscosity of the coal slurry. The additive is fed into the coal mill by an additive feeding pump. The water for pulping is sent into the coal mill from a coal milling water tank through a coal milling water pump. The water for pulping can be recycled by waste water, and can adopt grey water and fine slag pulp filtrate from a slag water treatment procedure and process condensate or waste water of other devices, and fresh water as make-up water. The coal slurry overflows out of the coal mill, after large particles more than 3mm are filtered out by a drum screen, the coal slurry automatically flows to a discharge chute of the coal mill by means of gravity, and the coal slurry is pumped into a gasification process coal slurry tank by the discharge chute of the coal mill.
Controlling the concentration of the coal slurry within the range of 59-61%; the viscosity of the coal slurry is generally controlled to be 600-1500 cP; the melting point temperature FT of the coal blending ash is 1150-1300 ℃; and the viscosity of the coal ash is 15 Pas-22 Pas at 1300-1350 ℃.
The particle size distribution should meet the following requirements:
| number of meshes | Weight passage rate% |
| 8 | 100 |
| 14 | 98-100 |
| 40 | 93-95 |
| 200 | 47-59 |
| 325 | 33-45 |
In the present invention, unless otherwise explicitly specified or limited, for example, the connection may be a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A coal-water slurry gasification coal blending method is characterized by comprising the following steps:
selecting high-ash fusion temperature coal meeting a high-temperature standard and low-ash fusion temperature coal meeting a low-temperature standard;
uniformly mixing high-ash fusion temperature coal and low-ash fusion temperature coal according to a set proportion;
and improving the pulping concentration of the blended coal to a set standard.
2. The coal-water slurry gasification coal blending method according to claim 1, characterized in that: the high temperature criterion is that FT is greater than 1500 ℃.
3. The coal-water slurry gasification coal blending method according to claim 2, characterized in that: the low temperature criterion is that FT is less than 1250 ℃.
4. The coal-water slurry gasification coal blending method according to any one of claims 1 to 3, characterized in that: the set standard of the pulping concentration is 60-62%.
5. The coal-water slurry gasification coal blending method according to any one of claims 1 to 3, characterized in that: the blending proportion of the high-ash fusion temperature coal is 5-20%.
6. The coal-water slurry gasification coal blending method according to claim 4, characterized in that: the blending proportion of the low-ash fusion temperature coal is 80-85%.
7. The coal-water slurry gasification coal blending method according to any one of claims 1 to 3, characterized in that: after blending coal, making the oxide component AL in the coal ash 2 O 3 /(CaO+Fe 2 O 3 )<0.8-1.0, and the acid-base ratio of the coal ash is ensured to be 0.9-1.2; the melting point temperature FT of the coal blending ash is 1150-1300 ℃; and the viscosity of the coal ash is 15 Pas-22 Pas at 1300-1350 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130452.2A CN115368943A (en) | 2022-09-15 | 2022-09-15 | Coal water slurry gasification coal blending method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130452.2A CN115368943A (en) | 2022-09-15 | 2022-09-15 | Coal water slurry gasification coal blending method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115368943A true CN115368943A (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211130452.2A Pending CN115368943A (en) | 2022-09-15 | 2022-09-15 | Coal water slurry gasification coal blending method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115368943A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845330A (en) * | 2010-03-30 | 2010-09-29 | 安徽淮化股份有限公司 | Coal blending method suitable for coal for pressurizing gasification of Texaco water coal slurry |
| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
| CN106833786A (en) * | 2017-03-29 | 2017-06-13 | 新疆心连心能源化工有限公司 | A kind of method for reducing coal ash melting property temperature |
-
2022
- 2022-09-15 CN CN202211130452.2A patent/CN115368943A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845330A (en) * | 2010-03-30 | 2010-09-29 | 安徽淮化股份有限公司 | Coal blending method suitable for coal for pressurizing gasification of Texaco water coal slurry |
| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
| CN106833786A (en) * | 2017-03-29 | 2017-06-13 | 新疆心连心能源化工有限公司 | A kind of method for reducing coal ash melting property temperature |
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Application publication date: 20221122 |
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