CN101440317A - Environment protection type coal water slurry and preparation thereof - Google Patents
Environment protection type coal water slurry and preparation thereof Download PDFInfo
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- CN101440317A CN101440317A CNA2008100793402A CN200810079340A CN101440317A CN 101440317 A CN101440317 A CN 101440317A CN A2008100793402 A CNA2008100793402 A CN A2008100793402A CN 200810079340 A CN200810079340 A CN 200810079340A CN 101440317 A CN101440317 A CN 101440317A
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Abstract
The invention relates to environment-friendly water-coal slurry and a method for preparing the same. The aim of the invention is to prepare the environment-friendly water-coal slurry by using wheat straw chemical pulping paper-making black liquor waste water and coal slurry as raw materials. The mixture ratio of the water-coal slurry is as follows: 57 to 62 percent of the (dried) coal slurry, 15 to 20 percent of the pulping paper-making black liquor, and 20 to 27 percent of pulping paper-making medium wastewater; and the total weight of various components is 100 percent. The method comprises the following steps: pumping the pulping paper-making black liquor subjected to sulfonating treatment into a strong stirring barrel; feeding the coal slurry into the strong stirring barrel through a feeder; pumping the pulping paper-making medium wastewater into the strong stirring barrel; starting the strong stirring barrel so that the materials are further dispersed and mixed; and filtering the mixture to remove impurities, and then pumping the mixture into a slurry storage tank through a screw pump for standby.
Description
Technical field
The present invention relates to a kind of coal water slurry and preparation method thereof, the environment protection type coal water slurry that particularly utilizes wheat straw chemical pulping paper making black liquor waste and coal slime to be mixed with, and the preparation method of this coal water slurry.
Technical background
Can discharge a large amount of coal slimes behind the coal washing, coal slime ash content height, grade is low, granularity is little, viscosity is big, moisture is high, and commodity value is lower, needs a large amount of places to stack.Unstable under stacking states, meet water and easily run off, air-dryly promptly to fly upward, contaminate environment is difficult to handle.Coal washery in all parts of the country all can produce a large amount of coal slimes every day, and the untimely processing of coal slime will influence the ordinary production of coal washery.On the other hand, the wheat straw chemical pulping paper making that China's paper industry adopts can be discharged a large amount of black liquor wastes, and serious pollution of ecological environment contain resources such as a large amount of xylogen, humic acids and organic matter in the black liquor waste, but major part can not get reasonable use.These wastes all if can be fully utilized is highly significant thing.
Summary of the invention
The present invention seeks to overcoming above-mentioned the deficiencies in the prior art, provide a kind of wheat straw chemical pulping paper making black liquor waste and coal slime etc. utilized to be the environment protection type coal water slurry of feedstock production, and the preparation method of this coal water slurry.
Environment protection type coal water slurry of the present invention proportioning by weight percentage is: coal slime (in dry coal mud) 57%-62%, pulping back liquor 15%-20%, pulping paper-making medium wastewater 20%-27%; Each component weight sum is 100%;
Coal slime adopts the primary slime of washing flotating raw coal by-product, the i.e. new coal slime of by-product behind the washing flotating raw coal.
Pulping back liquor is the modification black liquid of wheat straw chemical pulping by-product, and its technical indicator is: total solids content accounts for 10%-11% of gross weight; Wherein xylogen account for solid substance weight 24%-30%, humic acids accounts for 15%-20% of solid substance weight; Total alkali 13%-18%, pH value 8-10.
Pulping paper-making medium wastewater is the middle-stage wastewater that the wheat straw chemical pulping paper making is produced, and its technical indicator is: pH value 7-8, CODcr are 300-450mg/l, and BOD is 60-100mg/l, and SS is 90-100mg/l.
The method for making of environment protection type coal water slurry of the present invention is:
(1) pulping back liquor is carried out sulfonation and handle, promptly adopting sulfur dioxide gas that sulfur burning forms and pulping back liquor to carry out countercurrent reaction to pH value is 8-10;
(2) with flow pump reacted pulping back liquor is pumped into strong stirring barrel;
(3) coal slime is sent into strong stirring barrel through feeder again after stirrer is beaten dispersion;
(4) with flow pump pulping paper-making medium wastewater is pumped into strong stirring barrel;
(5) start strong stirring barrel, with three kinds of further dispersing and mixing of raw material;
(6) filter impurity elimination, it is standby to send into circulating tank with spiral pump then.
Coal water slurry in the circulating tank can directly be delivered to stokehold boiler of feeding burning.
Zhi Bei coal water slurry of the present invention as stated above, it is liquid to be black, concentration (solid content) about 60%, granularity 1mm-2mm, viscosity 814-1221mPas, stable 5-8d.
The present invention is applicable to that enterprises in pulp and paper industry or coal washing enterprise utilize trade waste to produce environment protection type coal water slurry.The present invention utilizes coal separation tankage coal slime to make base-material, and the pulping back liquor and the papermaking midcourse wastewater of preparation some amount are prepared into environment protection type coal water slurry, and calorific value is close with the ortho-water coal slurry, but that cost will be low is many, and synthesis energy saving consumption reduction rate is 20%-30%.The present invention carries out recycling with three kinds of waste materials, turns waste into wealth, turns harm into good, economizes on resources, reduces " three wastes " discharging, has both made full use of resource, and favorable economic benefit and environmental benefit are arranged again.
Embodiment
The present invention's concrete proportioning by weight percentage is: bituminous coal coal slime (in dry coal mud) 57%, pulping back liquor 20%, pulping paper-making medium wastewater 23%.
Organism accounts for 70% of solid substance in the pulping back liquor, and inorganics accounts for 30% of solid substance.
Concrete operation method is the water content that detects coal slime earlier in the laboratory, account for the ratio of environment protection type coal water slurry gross weight then according to dry coal mud, in the pulping paper-making medium wastewater of being added, deduct the coal slime water content, the actual exactly pulping paper-making medium wastewater that should replenish.Because the coal slime under the natural condition all contains moisture content, and the coal slime of different manufacturers, different time, batch the coal slime water content all different, so, coal slime is converted into dry coal mud calculates ratio for the ease of operation.
Preparation method of the present invention is: primary slime is pinched the mud stirrer by twin shaft disperse, be about to be evenly distributed in the solution after coal slime is broken up, claim coal slime is sent into strong stirring barrel through feeder with belt.It is enough big that the power of motor of the agitation vat that is adopted is wanted.
It is 8-10 that sulfur dioxide gas that the employing sulfur burning forms and pulping back liquor carry out countercurrent reaction to pH value; With flow pump the modification black liquor of wheat straw chemical pulping paper making by-product is pumped into strong stirring barrel then, the middle-stage wastewater of wheat straw chemical pulping paper making by-product is also pumped into strong stirring barrel.
Start strong stirring barrel, further dispersing and mixing; Filter impurity elimination, send into circulating tank with spiral pump.Be delivered to stokehold boiler of feeding burning.
Claims (3)
1, a kind of environment protection type coal water slurry is characterized in that proportioning by weight percentage is: coal slime (in dry coal mud) 57%-62%, pulping back liquor 15%-20%, pulping paper-making medium wastewater 20%-27%; Each component weight sum is 100%;
Pulping back liquor is the modification black liquid of wheat straw chemical pulping by-product, and its technical indicator is: total solids content accounts for 10%-11% of gross weight; Wherein xylogen account for solid substance weight 24%-30%, humic acids accounts for 15%-20% of solid substance weight; Total alkali 13%-18%, pH value 8-10;
Pulping paper-making medium wastewater is the middle-stage wastewater that the wheat straw chemical pulping paper making is produced, and its technical indicator is: pH value 7-8, CODcr are 300-450mg/l, and BOD is 60-100mg/l, and SS is 90-100mg/l.
2, environment protection type coal water slurry as claimed in claim 1 is characterized in that coal slime adopts the primary slime of washing flotating raw coal by-product.
3, the method for making of environment protection type coal water slurry as claimed in claim 1 is characterized in that:
(1) pulping back liquor is carried out sulfonation and handle, promptly adopting sulfur dioxide gas that sulfur burning forms and pulping back liquor to carry out countercurrent reaction to pH value is 8-10;
(2) with flow pump reacted pulping back liquor is pumped into strong stirring barrel;
(3) coal slime is sent into strong stirring barrel through feeder again after stirrer is beaten dispersion;
(4) with flow pump pulping paper-making medium wastewater is pumped into strong stirring barrel;
(5) start strong stirring barrel, with three kinds of further dispersing and mixing of raw material;
(6) filter impurity elimination, it is standby to send into circulating tank with spiral pump then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100793402A CN101440317B (en) | 2008-09-03 | 2008-09-03 | Environment protection type coal water slurry and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100793402A CN101440317B (en) | 2008-09-03 | 2008-09-03 | Environment protection type coal water slurry and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101440317A true CN101440317A (en) | 2009-05-27 |
| CN101440317B CN101440317B (en) | 2012-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100793402A Expired - Fee Related CN101440317B (en) | 2008-09-03 | 2008-09-03 | Environment protection type coal water slurry and preparation thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977954A (en) * | 2012-12-10 | 2013-03-20 | 贵州金赤化工有限责任公司 | Low-ash fusion point anthracitic water-coal slurry for coal gasification and preparation method thereof |
| CN103060031A (en) * | 2012-12-26 | 2013-04-24 | 东南大学 | Papermaking black liquor modified sludge-petroleum coke slurry and preparation method thereof |
| CN103175195A (en) * | 2011-12-23 | 2013-06-26 | 青岛特利尔环保锅炉工程有限公司 | Suspension type fluidized combustion process for preparing coal water slurry from industrial sewage |
| CN105695011A (en) * | 2016-03-16 | 2016-06-22 | 中国石油大学(华东) | Gasification auxiliary pulping system and application method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335267A (en) * | 2000-07-24 | 2002-02-13 | 张书良 | High-concentration industrial effluent treating method with coal slime |
| CN100408918C (en) * | 2004-01-15 | 2008-08-06 | 沈阳戴维国际机电设备有限公司 | Method for dealing with discharge liquid from paper, leather and dye printing industry using circulating fluidized combustion method |
-
2008
- 2008-09-03 CN CN2008100793402A patent/CN101440317B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175195A (en) * | 2011-12-23 | 2013-06-26 | 青岛特利尔环保锅炉工程有限公司 | Suspension type fluidized combustion process for preparing coal water slurry from industrial sewage |
| CN102977954A (en) * | 2012-12-10 | 2013-03-20 | 贵州金赤化工有限责任公司 | Low-ash fusion point anthracitic water-coal slurry for coal gasification and preparation method thereof |
| CN103060031A (en) * | 2012-12-26 | 2013-04-24 | 东南大学 | Papermaking black liquor modified sludge-petroleum coke slurry and preparation method thereof |
| CN105695011A (en) * | 2016-03-16 | 2016-06-22 | 中国石油大学(华东) | Gasification auxiliary pulping system and application method thereof |
| CN105695011B (en) * | 2016-03-16 | 2017-12-12 | 中国石油大学(华东) | One kind gasification auxiliary pulping system and its application method |
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| Publication number | Publication date |
|---|---|
| CN101440317B (en) | 2012-08-15 |
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