CN105542887B - Water-coal-slurry is prepared using high slat-containing wastewater - Google Patents
Water-coal-slurry is prepared using high slat-containing wastewater Download PDFInfo
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- CN105542887B CN105542887B CN201410596225.8A CN201410596225A CN105542887B CN 105542887 B CN105542887 B CN 105542887B CN 201410596225 A CN201410596225 A CN 201410596225A CN 105542887 B CN105542887 B CN 105542887B
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Abstract
The present invention relates to prepare water-coal-slurry using high slat-containing wastewater.Wherein, the sewage coal slurry that prepared by high slat-containing wastewater, includes the component of following proportionings, is mass parts：The mass % parts of high slat-containing wastewater 10 ~ 36；The mass % parts of stabilizer 0.05 ~ 0.2；The mass % parts of dispersant 0.5 ~ 2；The mass % parts of coal dust 60 ~ 68.Wherein, as the method for the sewage coal slurry described in high slat-containing wastewater prepares claim 1, it is characterised in that：Step 1：RO films strong brine passes through salt acid for adjusting pH to 6 ~ 7；Step 2：The preparation of high slat-containing wastewater water-coal-slurry：Waste water, addition water/dispersant and the coal that step 1 is obtained together enter mill and are ground, and the rear stabilizer that adds regrinds into slurry.
Description
Technical field
The invention belongs to dangerous waste water integrated treatment field, is related to the method that water-coal-slurry is prepared using high slat-containing wastewater.
Background technology
Water-coal-slurry is a kind of new generation oil coal derived fuel to grow up after world oil crisis the 1970s, is had
The advantages such as convenient transportation, high combustion efficiency, pollutant discharge amount be low.Can replace fuel oil be used for station boiler, Industrial Boiler and
Industrial Stoves.Water-coal-slurry is to be obtained by the additive of about 65 mass % coal, 34 mass % water and 1 mass % by Physical Processing
A kind of low stain for arriving, high efficiency, can pipeline generation oil coal based fluid fuel.It is special that it had both maintained the original physics of coal
Property, there is oil the same mobility and stability again, storage, pipeline transportation and spray burning, quilt can be easy to as oil
Referred to as liquid coal product.Water-coal-slurry changes the traditional combustion mode of coal, and its efficiency of combustion is up to more than 95%, and dioxy
Change sulphur, the discharge capacity and the equal meet the requirement of environmental protection of dust concentration of nitrogen oxides, therefore, application is extremely wide, and shows huge
Big environmental protection and energy saving advantage.
But the manufacture of water-coal-slurry is very big to the consumption of water, 35% or so is water, and has certain requirement to water quality,
In China in the late two decades from preliminary examination to commercialization, running water is all used when manufacturing water-coal-slurry（Or clear water）.Along with cleaning is set
Industrial conventional requirement, the water consumption such as standby can not be ignored.
At the same time, as China's expanding economy, the discharge capacity of waste water sharply increase.High slat-containing wastewater refers to derive from
High saliferous of the caused total salinity more than 1% is dirty in sewage, Circulating water effluent and sewage disposal system after reverse osmosis membrane processing
Water, containing higher such as Cl-、SO4 2-、Na+, Ca2+Deng inorganic ions, have that salt content is high, intractable feature.China's high salt
Waste water produces quantity in total waste water up to 5%, is still increased every year with 2% speed.Therefore, high-salt wastewater processing is in sewage disposal
There is critical role, be the emphasis of wastewater treatment research, and difficult point.High-salt wastewater intractability is big more than common sewage disposal
Much.Study at present and conventional high-salt wastewater method has evaporation, electrolysis, membrane separation process, burning method and bioanalysis etc., deposit
Expensive in equipment, processing procedure is easily stifled, easily pollution, and dope handles the problem of difficult.
The main salt content of the waste water is higher, arrives concentration of seawater but without height, but for sewage disposal, salt is in system
In can not remove.Although the method that water-coal-slurry is prepared using industrial wastewater in the prior art be present, the high saliferous of the application gives up
Water salt content is high, can not be directly used in preparation water-coal-slurry using method of the prior art.
After high slat-containing wastewater is made into sewage Slurry Combustion using the present processes, reusing sewage/recycling economy is risen
To vital effect.
It is well known that at present, global water shortage has become a great problem of the mankind.The whole world all pay attention to water saving and
With the improvement of water method.And China is that one of water shortage state, Beijing are water shortage city in the world, Yanshan Petrochemical company is saving water
Resource, by oil-refining chemical sewage after reuse water device is handled, boiler of feeding and circulating cooling make-up water are annual to produce recycle-water about
More than 740 ten thousand tons, huge contribution is made that for water conservation.But high saliferous caused by the RO reverse osmosis membranes of reuse water device
Waste water, because its salt content is very high, following for sewerage is discharged into sewage disposal-reusing sewage-RO reverse osmosis membranes-high saline sewage
In ring, salt content meeting more and more higher, it is necessary to carry out desalting processing.
High-salt wastewater is because moisture, content of ashes are high, complicated component, it is difficult to disposal and utilization.But they are all containing certain
The combustable organic material of amount, there is certain calorific value, and a kind of valuable resource.Therefore, water-coal-slurry is produced using waste water
And efficient burning, it can not only economize on coal, economize on water, save additive, can also be the resource of waste water so as to reduce slurrying cost
Change, minimizing and harmless treatment provide a new approach.
The content of the invention
It is an object of the invention to provide a kind of high slat-containing wastewater water-coal-slurry, includes the component of following proportionings, is mass parts：
The mass % parts of high slat-containing wastewater 10 ~ 36；The mass % parts of stabilizer 0.05 ~ 0.2；The mass % parts of dispersant 0.5 ~ 2；The matter of coal dust 60 ~ 68
Measure % parts.On the basis of the weight of high slat-containing wastewater, salt content 1-2%.
Wherein, the species of the dispersant is known to those skilled in the art, and under preferable case, the dispersant is
FDN high efficiency water reducing agents（It is specifically as follows naphthalenesulfonic acid-formaldehyde condensate, and can be with commercially available, such as purchased from the sensible section in Foochow
Skill Co., Ltd, Beijing original creation Science and Technology Ltd.）.Wherein, the species of the stabilizer is known to those skilled in the art,
Such as can be sodium carboxymethylcellulose（Can be with commercially available, such as purchased from the sensible Science and Technology Ltd. in Foochow, Beijing original creation section
Skill Co., Ltd）.
A further object of the present invention is to provide a kind of method by the use of high-salt wastewater as water-coal-slurry industrial water, is saving
The expense post-processed to waste water is also a saving while about with water, reduction water-coal-slurry cost and avoids waste water to environment
Pollution.
High slat-containing wastewater processing method provided by the invention comprises the following steps：It is 0.6 ~ 1.0% to adjust dispersant,
It is fabricated to sewage coal slurry.In the present invention, for meeting that the source of high slat-containing wastewater of above-mentioned condition does not limit clearly, institute
It is usually sewage after reverse osmosis membrane processing, caused total saliferous in Circulating water effluent and sewage disposal system to state high slat-containing wastewater
High saline sewage of the amount more than 1%.Feed coal uses Datong District's weakly caking coal.
Specifically, the present invention provides manufactures sewage coal using the strong brine replacement fresh water of the high saliferous of reverse osmosis unit
The method of slurry, this method comprise the following steps：Step 1, the pH value adjustment of reverse osmosis (RO) film strong brine：Pass through salt acid for adjusting pH
To 6 ~ 7；Step 2, the preparation of high slat-containing wastewater water-coal-slurry：Waste water, Jia Shui, dispersant and the coal that step 1 is obtained together enter mill
It is ground, the rear stabilizer that adds regrinds into slurry.
The invention has the advantages that：By the way that the high slat-containing wastewater of reverse osmosis unit is made into sewage coal slurry to water coal
Burnt on slurry boiler, to eliminate them to strong brine caused by reuse water device production process, can not only save described
The post processing expense of sewage, additionally it is possible to the problem of eliminating wastewater reusing device production, by the nothing of the liquid wastes such as high slat-containing wastewater
Evilization comprehensively utilizes, and realizes the purpose that liquid pollutant is not shifted, do not dispatched from the factory, and further reduces fresh water consumption, realizes dirty
Water --- recycle-water --- device（Power boiler, recirculated water）--- the benign cycle of sewage.
Sewage coal slurry is made with high saline sewage, concentration is appropriate to adjust dispersant and stabilizer formula up to 65% or so,
Both water-coal-slurry making can have been completed, had been burnt for coal water slurry boiler.Combustion test is normal, it is ensured that environment protection standard is discharged.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.RO films high-salt wastewater comes from Yanshan Petrochemical, point
Powder is FDN high efficiency water reducing agents, and stabilizer is sodium carboxymethylcellulose.
The sample of the water-coal-slurry sample is sampled and prepared by GB/T 18856.1 regulation, water-coal-slurry quality standard
Such as following table：
Embodiment 1：
12 parts of RO films high-salt wastewaters adjust pH to 7 by pH regulation tanks with hydrochloric acid, then add 23.45 parts of water and 63 parts
Coal, 1.5 parts of dispersants together enter mill and are ground, and are eventually adding 0.05 part of stabilizer and regrind into slurry.
Embodiment 2
Then 20 parts of RO films high-salt wastewaters add 14 parts of water, with 65 parts after pH regulation tanks adjust pH to 7 with hydrochloric acid
Coal, 0.9 part of dispersant together enter mill and are ground, and are eventually adding 0.1 part of stabilizer and regrind into slurry.
Embodiment 3
36 parts of RO films high-salt wastewaters adjust pH by pH regulation tanks with hydrochloric acid, then add 9.0 parts of water and 62.59 parts of coals,
1.3 parts of dispersants together enter mill and are ground, and are eventually adding 0.11 part of stabilizer and regrind into slurry.
The parameter for the water-coal-slurry that each embodiment obtains see the table below：
Combustion efficiency：
In upper table, it is the water-coal-slurry obtained in above-mentioned all embodiments that 100% swallow, which leads to sewage slurry,.
By above table data, verify that the water-coal-slurry that high saline sewage makes meets water-coal-slurry quality criteria requirements, and
Normally used in boiler and fume environment protection discharge meets Beijing《Emission standard of air pollutants for boilers》21148-2007DB is marked
Alignment request.
It is described above, only it is exemplary embodiments of the present invention, is not intended to limit the scope of the present invention, it is all
It is to still fall within this to implementing any subtle modifications, equivalent variations and modifications done above according to technical spirit of the invention
In the range of the technical scheme of invention.
Claims (3)
1. sewage coal slurry prepared by high slat-containing wastewater, it is characterised in that include the component of following proportionings, be mass parts：
The mass parts of high slat-containing wastewater 10 ~ 36；
The mass parts of stabilizer 0.05 ~ 0.2；
The mass parts of dispersant 0.5 ~ 2；
The mass parts of coal dust 60 ~ 68；
Described water-coal-slurry is prepared by following steps：
Step 1：RO films strong brine passes through salt acid for adjusting pH to 6 ~ 7；
Step 2：The preparation of high slat-containing wastewater water-coal-slurry：Waste water, water, dispersant and the coal that step 1 is obtained, which together enter mill, to be carried out
Grinding, the rear stabilizer that adds regrind into slurry, wherein on the basis of the weight of high slat-containing wastewater, salt content is 1~2%.
2. sewage coal slurry according to claim 1, it is characterised in that wherein described dispersant is FDN high efficiency water reducing agents, institute
It is sodium carboxymethylcellulose to state stabilizer.
3. as the method for the sewage coal slurry described in high slat-containing wastewater prepares claim 1, it is characterised in that comprise the following steps：
Step 1：RO films strong brine passes through salt acid for adjusting pH to 6 ~ 7；
Step 2：The preparation of high slat-containing wastewater water-coal-slurry：Waste water, water, dispersant and the coal that step 1 is obtained, which together enter mill, to be carried out
Grinding, the rear stabilizer that adds regrind into slurry, and the content of each component is as claimed in claim 1.
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| CN105542887B true CN105542887B (en) | 2017-12-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812338A (en) * | 2010-04-28 | 2010-08-25 | 陕西科技大学 | Coal water slurry addition agent, preparation method thereof and coal water slurry based on same |
| WO2011113342A1 (en) * | 2010-03-15 | 2011-09-22 | 钦州鑫能源科技有限公司 | Preparation method for ultra low ash coal-water slurry |
| CN102766494A (en) * | 2012-08-09 | 2012-11-07 | 泰安市良达新能源有限责任公司 | Process for preparing coal water slurry by winery wastewater |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011113342A1 (en) * | 2010-03-15 | 2011-09-22 | 钦州鑫能源科技有限公司 | Preparation method for ultra low ash coal-water slurry |
| CN101812338A (en) * | 2010-04-28 | 2010-08-25 | 陕西科技大学 | Coal water slurry addition agent, preparation method thereof and coal water slurry based on same |
| CN102766494A (en) * | 2012-08-09 | 2012-11-07 | 泰安市良达新能源有限责任公司 | Process for preparing coal water slurry by winery wastewater |
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