CN106269085A - A kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration - Google Patents
A kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration Download PDFInfo
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- CN106269085A CN106269085A CN201610738185.5A CN201610738185A CN106269085A CN 106269085 A CN106269085 A CN 106269085A CN 201610738185 A CN201610738185 A CN 201610738185A CN 106269085 A CN106269085 A CN 106269085A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- 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
Abstract
The present invention provides a kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration, belongs to clean coal technology field, is applied to coal water slurry gasification field.It is specially and is introduced into rod mill grinding from upstream through broken gasification raw coal (granularity is≤20mm), water-coal-slurry after grinding flows automatically to grinding machine outlet slot, then with pump, part water-coal-slurry being sent into fine grinding in ball mill, the duff slurry after fine grinding returns to rod mill entrance after proportioning.Can reach and improve particle-size distribution of coal-water slurry, improve deposition efficiency, the purpose of the water-coal-slurry of preparation high concentration, become a new way preparing low-disintegration coal high concentration gasified coal water slurry.
Description
Technical field
The invention belongs to clean coal technology field, particularly relate to one ball mill concentration low-disintegration coal gasified coal water slurry concentration
Method.
Background technology
Along with the application of clean coal technology, Coal Gasification Technology is extensively applied.Coal water slurry gasification technology is because of gasified raw material scope
Relatively wide, mature technology, flow process is simple, process control safety, and gasification efficiency of carbon con version is higher, and the degree of reliability is high,
Operating flexibility is big, and raw gas quality is good, and purposes is wide, and the coal feeding amount range of choice of separate unit gasification furnace is wide, and gasification is polluted few, ring
Guaranteed cost advantages of higher, obtains the extensive application in coal chemical technology.
China's low-middle metamorphic coal charcoal resource reserve enriches, and present stage need to large-scale develop and utilize.Low change in particularly
The dross coal of matter, weakly caking coal and jet coal account for the larger proportion of aggregate resource.Low-middle metamorphic coal has low ash, low-sulfur, middle height are waved
Send out point, the higher characteristic of grindability index, compare be suitable for industrial and civilian, generating and chemical industry coal.This type of coal is suitable for doing water
Coal slurry gasification coal, but the paste-forming properties after this coal is ground is poor, and its water-coal-slurry slurry concentration mostly is 50%-54% (wt%),
And gasification water coal slurry concentration is it is generally required in 60%-65% (wt%) left and right, water coal slurry concentration decline can make feeding gasification furnace
The water yield improve, the required heat consumed of transpiring moisture increases, and available gas composition reduces, and reduces cold gas efficiency, increases
Oxygen consumption, it is unfavorable to produce gasification installation.
General particle-size distribution of coal-water slurry scope
For the most efficient coal using paste-forming properties poor, it is necessary to find the method improving its concentration, use rod milling
Machine grinding+ball mill fine grinding technology, water-coal-slurry not only can reach the granularity requirements of regulation, and have good particle size distribution model
Enclosing, different size of coal particle can mutually be filled, and reduces the gap between coal particle, reaches higher deposition efficiency, with less
Water consumption, the water-coal-slurry of high concentration can be made.
Preparing high-concentration coal-water slurry is the core technology rationally efficiently utilizing the poor low-middle metamorphic coal of paste-forming properties.Rod mill grinds
Mill+ball mill fine grinding technology high-concentration coal-water slurry technology still, in coal chemical technology is developed, has no industrialization the most both at home and abroad
Produce report.
Summary of the invention
The technique that the present invention provides a kind of rod mill grinding+ball mill fine grinding concentration low-disintegration coal gasified coal water slurry concentration
Method.Utilize this process low-disintegration coal can be made high-concentration coal-water slurry, meet the grain of low-disintegration coal coal water slurry gasification
Degree distribution and concentration requirement, reach the purpose rationally efficiently utilizing low-disintegration coal to gasify.
The present invention realizes by following technical solution:
A kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration, it is characterised in that gasification raw coal crushes,
Gasification raw coal after Po Sui and water, additive, pH value regulator and thin water-coal-slurry proportioning mixed grinding in rod mill, rod milling
The 70-90% water-coal-slurry of machine discharging is with being pumped into high pressure coal stock tank, directly as the vaporized furnace gas of qualified gasified coal water slurry, separately
10-30% rod mill discharging is delivered to ball mill fine grinding and is prepared thin water-coal-slurry, and prepared thin water-coal-slurry returns to rod mill as system
The raw material of standby water-coal-slurry.
The described method using ball mill concentration low-disintegration coal gasified coal water slurry concentration, it is characterised in that: described thin water
Coal slurry granularity is for account for 75-80wt% less than 325 purposes, and particle mean size is 15-30 μm, and concentration is 30-40%, and described uses ball milling
The method of machine concentration low-disintegration coal gasified coal water slurry concentration, it is characterised in that: comprise the steps:
(1) the gasification raw coal from upstream process is crushed to the broken coal of granularity≤20mm, meets rod mill entrance coal
Granularity requirements；
(2) step (1) prepares broken coal and water, additive, pH value regulator and thin water-coal-slurry proportioning in rod mill
Mixing, grinding, prepare water-coal-slurry；The ratio of mixing is broken coal: water is about 6:4, and the consumption of additive is about broken coal and water inventory
2%, the consumption of pH value regulator about broken coal adds the 0.2% of water inventory, and the consumption of thin water-coal-slurry is that broken coal adds water inventory
10%～30%；
(3) water-coal-slurry prepared by step (2) caches in grinding machine outlet slot, and 70-90% water-coal-slurry is with being pumped into high pressure coal
Stock tank, directly as the vaporized furnace gas of qualified gasified coal water slurry；
(4) by step (3) prepare water-coal-slurry residue 10-30% by being pumped into ball mill, at ball milling after adding water
Machine grinds further, prepares the superfine thin water-coal-slurry of granule, its granularity for account for 75～80wt% less than 325 mesh, particle mean size
For 15-30 μm, thin water coal slurry concentration is 30～40wt%；
(5) thin water-coal-slurry step (4) prepared is mixed with broken coal, additive, pH value regulator with being pumped into rod mill
Close and grind, as the raw material of preparation water-coal-slurry.
It is introduced into rod mill from upstream through broken gasification raw coal (granularity is≤20mm) to grind, the water coal after grinding
Slurry flows automatically to grinding machine outlet slot, then with pump, partial gasification water-coal-slurry is sent into fine grinding in ball mill, the thin water-coal-slurry after fine grinding
Return to rod mill entrance, specifically include following steps:
(1) gasification raw coal crushes
Gasification raw coal from upstream process is crushed to the broken coal of granularity≤20mm, meets the granularity of rod mill entrance coal
Requirement.
(2) rod mill grinds
Broken coal that step (1) prepares and the thin water-coal-slurry that returns of step (5) and water, additive, pH value regulator are at rod
In grinding machine, proportioning mixing, grinding, prepare gasified coal water slurry.
Particle-size distribution of coal-water slurry
The water coal slurry concentration that its concentration more individually uses rod mill to grind improves 2%～5%.
(3) grinding machine outlet slot
Gasified coal water slurry prepared by step (2) caches in grinding machine outlet slot, and the gasified coal water slurry of 10%～30% passes through
Being pumped into ball mill fine grinding, another 90%～70% gasified coal water slurry is with being pumped into high pressure coal stock tank, directly as qualified gasified water
The vaporized furnace gas of coal slurry.
(4) ball mill fine grinding
Grind further in ball mill after the gasified coal water slurry that step (2) prepares is added water, prepare superfine thin of granule
Water-coal-slurry, its granularity is for account for 75%～80% (wt%) less than 325 mesh (45 μm), and particle mean size is 15-30 μm, and thin water-coal-slurry is dense
Degree is 30%～40% (wt%).
(5) thin water-coal-slurry slurry returns to rod mill
Thin water-coal-slurry step (4) prepared mixes with broken coal, additive, pH value regulator and grinds with being pumped into rod mill
Mill.
In sum, present invention have the advantage that
(1) water-coal-slurry granularity, the concentration that prepared by the present invention meet low-disintegration coal coal water slurry gasification requirement.
(2) present invention grinds broken coal, thin water-coal-slurry, additive and pH value regulator mixture, rod mill with rod mill
The water-coal-slurry prepared is qualified gasified coal water slurry, and technological process is simple, and reasonable in design, energy consumption is low, effectively reduces low rotten
Coal gasification slurrying cost.
(3) using ball mill fine grinding in the present invention, the thin water-coal-slurry that ball mill grinds is returned directly to rod mill entrance with broken
Coals etc. mix, and technological process is simple, reasonable in design, and energy consumption is low, can improve the yield of rod mill.Ball mill low cost, technology become
Ripe, operating flexibility is big.Separate unit ball mill can be that one or more rod mill provides thin water-coal-slurry, flexible configuration, reliable, energy consumption
Low.
(4) the thin water-coal-slurry in the present invention, ball mill fine grinding prepared returns in rod mill, greatly improves rod mill
The particle size distribution of discharging so that particle-size distribution of coal-water slurry is reasonable, deposition efficiency is high, and its concentration is relatively used alone rod mill and can improve
2%～about 5%, make the available gas composition of gasifying process increase, improve cold gas efficiency, reduce oxygen consumption, be conducive to
Gasification production run, reaches the purpose rationally efficiently utilizing low-disintegration coal to gasify.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart.
Detailed description of the invention
The described method using ball mill concentration low-disintegration coal gasified coal water slurry concentration, as shown in Figure 1.Including walking as follows
Rapid:
(1) the gasification raw coal from upstream process is crushed to the broken coal of granularity≤20mm, meets rod mill entrance coal
Granularity requirements；
(2) step (1) prepares broken coal and water, additive, pH value regulator and thin water-coal-slurry proportioning in rod mill
Mixing, grinding, prepare water-coal-slurry；The ratio of mixing is broken coal: water is about 6:4, and the consumption of additive is about broken coal and water inventory
2%, the consumption of pH value regulator about broken coal adds the 0.2% of water inventory, and the consumption of thin water-coal-slurry is that broken coal adds water inventory
10%～30%；
(3) water-coal-slurry prepared by step (2) caches in grinding machine outlet slot, and 90% water-coal-slurry is with being pumped into high-pressure coal slurry
Groove, directly as the vaporized furnace gas of qualified gasified coal water slurry；
(4) by step (3) prepare water-coal-slurry residue 10% by being pumped into ball mill, after adding water in ball mill
Grinding further, prepare the thin water-coal-slurry that granule is superfine, its granularity is for account for 75～80wt% less than 325 mesh, and particle mean size is 15-
30 μm, thin water coal slurry concentration is 30～40wt%；
(5) thin water-coal-slurry step (4) prepared is mixed with broken coal, additive, pH value regulator with being pumped into rod mill
Close and grind, as the raw material of preparation water-coal-slurry.
Claims (3)
1. the method by ball mill concentration low-disintegration coal gasified coal water slurry concentration, it is characterised in that gasification raw coal crushes, broken
Gasification raw coal after broken and water, additive, pH value regulator and thin water-coal-slurry proportioning mixed grinding in rod mill, rod mill
The 70-90% water-coal-slurry of discharging is with being pumped into high pressure coal stock tank, directly as the vaporized furnace gas of qualified gasified coal water slurry, another 10-
30% rod mill discharging is delivered to ball mill fine grinding and is prepared thin water-coal-slurry, and prepared thin water-coal-slurry returns to rod mill as preparing water
The raw material of coal slurry.
The method of ball mill concentration low-disintegration coal gasified coal water slurry concentration the most according to claim 1, it is characterised in that:
Described thin water-coal-slurry granularity is for account for 75-80wt% less than 325 purposes, and particle mean size is 15-30 μm, and concentration is 30-40%.
The method of ball mill concentration low-disintegration coal gasified coal water slurry concentration the most according to claim 1, it is characterised in that:
Comprise the steps:
(1) the gasification raw coal from upstream process is crushed to the broken coal of granularity≤20mm, meets the granularity of rod mill entrance coal
Requirement;
Broken coal that (2) step (1) prepares and the proportioning mixing in rod mill of water, additive, pH value regulator and thin water-coal-slurry,
Grind, prepare water-coal-slurry；The ratio of mixing is broken coal: water is about 6:4, and the consumption of additive is about the 2% of broken coal and water inventory,
The consumption of pH value regulator about broken coal adds the 0.2% of water inventory, and the consumption of thin water-coal-slurry is that broken coal adds the 10% ~ 30% of water inventory;
(3) water-coal-slurry prepared by step (2) caches in grinding machine outlet slot, 70-90% water-coal-slurry with being pumped into high pressure coal stock tank,
Directly as the vaporized furnace gas of qualified gasified coal water slurry；
(4) by step (3) prepare water-coal-slurry residue 10-30% by being pumped into ball mill, enter in ball mill after adding water
One step is ground, and prepares the thin water-coal-slurry that granule is superfine, and its granularity is for account for 75 ~ 80wt% less than 325 mesh, and particle mean size is 15-30 μ
M, thin water coal slurry concentration is 30 ~ 40wt%；
(5) thin water-coal-slurry step (4) prepared mixes with broken coal, additive, pH value regulator and grinds with being pumped into rod mill
Mill, as the raw material of preparation water-coal-slurry.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738185.5A CN106269085A (en) | 2016-08-26 | 2016-08-26 | A kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration |
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| CN201610738185.5A CN106269085A (en) | 2016-08-26 | 2016-08-26 | A kind of method of ball mill concentration low-disintegration coal gasified coal water slurry concentration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536223A (en) * | 2018-11-07 | 2019-03-29 | 南京楠达环保科技有限公司 | A kind of preparation method and production equipment of high concentration gasified coal water slurry |
| CN113604261A (en) * | 2021-07-12 | 2021-11-05 | 江苏恒丰能环科技股份有限公司 | Method for precise grading by adopting screening of coal slurry separator |
| CN115058267A (en) * | 2022-07-27 | 2022-09-16 | 神华准能资源综合开发有限公司 | Coal water slurry concentration method and coal water slurry concentration device |
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| US4613084A (en) * | 1983-06-28 | 1986-09-23 | Babcock-Hitachi Kabushiki Kaisha | Process for producing a coal-water slurry |
| JPS6317990A (en) * | 1986-07-10 | 1988-01-25 | Kawasaki Heavy Ind Ltd | Wet production of coal-water slurry in high concentration |
| CN103013595A (en) * | 2011-09-21 | 2013-04-03 | 兖矿集团有限公司 | Novel slurrying technology of low-rank coal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536223A (en) * | 2018-11-07 | 2019-03-29 | 南京楠达环保科技有限公司 | A kind of preparation method and production equipment of high concentration gasified coal water slurry |
| CN113604261A (en) * | 2021-07-12 | 2021-11-05 | 江苏恒丰能环科技股份有限公司 | Method for precise grading by adopting screening of coal slurry separator |
| CN115058267A (en) * | 2022-07-27 | 2022-09-16 | 神华准能资源综合开发有限公司 | Coal water slurry concentration method and coal water slurry concentration device |
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Application publication date: 20170104 |