CN105542887A - Preparation of coal water slurry by using high salt content wastewater - Google Patents
Preparation of coal water slurry by using high salt content wastewater Download PDFInfo
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- CN105542887A CN105542887A CN201410596225.8A CN201410596225A CN105542887A CN 105542887 A CN105542887 A CN 105542887A CN 201410596225 A CN201410596225 A CN 201410596225A CN 105542887 A CN105542887 A CN 105542887A
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Abstract
The present invention relates to preparation of coal water slurry by using high salt content wastewater, wherein the sewage coal slurry prepared from high salt content wastewater comprises, by mass, 10-36% of high salt content wastewater, 0.05-0.2% of a stabilizer, 0.5-2% of a dispersing agent, and 60-68% of coal powder. The preparation method is characterized by comprising: 1, adjusting the pH value of RO membrane concentrated salt water to 6-7 by using hydrochloric acid; and 2, preparing high salt content wastewater coal water slurry, wherein the wastewater obtained in the step 1 is added with water/a dispersing agent, the obtained mixture and coal are added to a mill, grinding is performed, a stabilizer is added, and grinding is performed to obtain the slurry.
Description
Technical field
The invention belongs to dangerous waste water comprehensive treating process field, relate to the method adopting high slat-containing wastewater to prepare coal water slurry.
Background technology
Coal water slurry is the one oil coal derived fuel of novel generation grown up after 20 century 70 world oil crisis, has the advantages such as convenient transportation, efficiency of combustion is high, pollutant discharge amount is low.Oil fuel can be replaced to be used for station boiler, Industrial Boiler and Industrial Stoves.Coal water slurry be obtained by Physical Processing by the additive of the coal of about 65 quality %, the water of 34 quality % and 1 quality % a kind of low stain, high-level efficiency, can Cemented filling for oily coal based fluid fuel.It had both maintained the original physical property of coal, had again the same mobility of oil and stability, can be easy to storage, pipeline transportation and spray burning, be called as liquid coal product as oil.Coal water slurry changes the traditional combustion mode of coal, and its efficiency of combustion can reach more than 95%, and the quantity discharged of sulfurous gas, oxynitride and the equal meet the requirement of environmental protection of dust concentration, therefore, application is very extensive, and shows huge environmental protection and energy saving advantage.
But the manufacture of coal water slurry is very big to the consumption of water, and about 35% is water, and has certain requirement to water quality, comes from preliminary examination to commercialization at China's recent two decades, when manufacturing coal water slurry, all use tap water (or claiming clear water).Add the industrial conventional requirement such as cleaning equipment, water consumption can not be ignored.
Meanwhile, along with China's expanding economy, the quantity discharged of waste water sharply increases.The high saline sewage that the total salinity produced in sewage, Circulating water effluent and Sewage treatment systems after high slat-containing wastewater refers to and derives from reverse osmosis membrane processing is greater than 1%, containing higher as Cl
-, SO
4 2-, Na
+, Ca
2+deng mineral ion, there is high, the unmanageable feature of saltiness.China's high-salt wastewater produces quantity and reach 5% in total waste water, still increases with the speed of 2% every year.Therefore, high-salt wastewater process has critical role in sewage disposal, and being the emphasis of wastewater treatment research, is also difficult point.High-salt wastewater intractability is much bigger more than common sewage disposal.Current research and conventional high-salt wastewater method have method of evaporation, electrolytic process, membrane separation process, burning method and biological process etc., there is apparatus expensive, and treating processes is easily blocked up, easily polluted, and the problem of dope process difficulty.
The main saltiness of this waste water is higher, but does not also have high to concentration of seawater, but to sewage disposal, salt cannot remove in systems in which.Although there is the method using trade effluent to prepare coal water slurry in prior art, the high slat-containing wastewater saltiness of the application is high, and method of the prior art cannot be utilized to be directly used in preparation coal water slurry.
After adopting the method for the application that high slat-containing wastewater is made sewage Slurry Combustion, vital effect is played to reusing sewage/recycling economy.
As everyone knows, at present, global lack of water has become a great problem of the mankind.Water saving and the improvement by water method are all being paid attention in the whole world.And China is one of lack of water state in the world, Beijing is lack of water city, and Yanshan Petrochemical company is saving water resource, by oil-refining chemical sewage after reuse water device process, boiler of feeding and circulating cooling make-up water, annual production reuse water about more than 740 ten thousand tons, for huge contribution has been made in water conservation.But the high slat-containing wastewater that the RO reverse osmosis membrane of reuse water device produces, because its saltiness is very high, sewage disposal-reusing sewage-RO reverse osmosis membrane-Gao saline sewage enters in the circulation of sink drainage, salts contg can be more and more higher, must carry out desalting treatment.
High-salt wastewater due to moisture, ash oontent high, complicated component, be difficult to dispose and utilize.But they all contain a certain amount of combustable organic material, have certain calorific value, it is also a kind of valuable resource.Therefore, utilize waste water to produce coal water slurry and efficient burning, not only can economize on coal, economize on water, save additive, thus reduce slurrying cost, a new approach can also be provided for the resource utilization of waste water, minimizing and harmless treatment.
Summary of the invention
The object of this invention is to provide a kind of high slat-containing wastewater coal water slurry, comprise the component of following proportioning, be mass parts: high slat-containing wastewater 10 ~ 36 quality % part; Stablizer 0.05 ~ 0.2 quality % part; Dispersion agent 0.5 ~ 2 quality % part; Coal dust 60 ~ 68 quality % part.With the weight of high slat-containing wastewater for benchmark, salts contg is 1-2%.
Wherein, the kind of described dispersion agent is conventionally known to one of skill in the art, under preferable case, described dispersion agent is that FDN high efficiency water reducing agent (is specifically as follows naphthalenesulfonic acid-formaldehyde condensate, and can be commercially available, such as, purchased from the sensible Science and Technology Ltd. in Foochow, Beijing original creation Science and Technology Ltd.).Wherein, the kind of described stablizer is conventionally known to one of skill in the art, such as, can be Xylo-Mucine (can be commercially available, such as, purchased from the sensible Science and Technology Ltd. in Foochow, Beijing original creation Science and Technology Ltd.).
Another object of the present invention is to provide a kind of high-salt wastewater that utilizes as the method for coal water slurry water of productive use, water saving, reduce coal water slurry cost while also a saving and the expense of aftertreatment is carried out to waste water and avoids the pollution of waste water to environment.
High slat-containing wastewater treatment process provided by the invention comprises the following steps: adjustment dispersant is 0.6 ~ 1.0%, is made into sewage coal slurry.In the present invention, for the restriction that the source of the high slat-containing wastewater meeting above-mentioned condition is not clear and definite, the high saline sewage that the total salinity produced in sewage, Circulating water effluent and Sewage treatment systems after described high slat-containing wastewater is generally reverse osmosis membrane processing is greater than 1%.Feed coal adopts Datong District's weakly caking coal.
Specifically, the invention provides and utilize the strong brine of the high saliferous of reverse osmosis unit to substitute the method that fresh water manufactures sewage coal slurry, the method comprises the following steps: step one, the pH value adjustment of reverse osmosis (RO) film strong brine: by salt acid for adjusting pH to 6 ~ 7; Step 2, the preparation of high slat-containing wastewater coal water slurry: the waste water that step 1 is obtained, add water, dispersion agent and coal together enter mill and grind, after add stablizer and to regrind pulping.
The present invention has following beneficial effect: burn by being made on sewage coal slurry to coal water slurry boiler by the high slat-containing wastewater of reverse osmosis unit, , to eliminate the strong brine that they produce reuse water device production process, not only can save the aftertreatment expense of described sewage, the problem that wastewater reusing device is produced can also be eliminated, by the innoxious comprehensive utilization of the Liquid wastes such as high slat-containing wastewater, realize liquid pollutant not shift, the object of not dispatching from the factory, further minimizing fresh water consumption,---reuse water---device (power boiler that realizes sewage, recirculated water)---the benign cycle of sewage.
Make sewage coal slurry with high saline sewage, concentration can reach about 65%, suitably adjustment dispersion agent and stabilizer formula, both can complete coal water slurry and make, and burn for coal water slurry boiler.Combustion test is normal, can ensure that environment protection standard is discharged.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.RO film high-salt wastewater is from Yanshan Petrochemical, and dispersion agent is FDN high efficiency water reducing agent, and stablizer is Xylo-Mucine.
The sample of described coal water slurry sample is undertaken sampling and preparing by the regulation of GB/T18856.1, and coal water slurry quality standard is as following table:
Embodiment 1:
12 parts of RO film high-salt wastewaters through pH regulator tank with hydrochloric acid adjustment pH to 7, then add 23.45 parts of water and 63 parts of coals, 1.5 parts of dispersion agents together enter mill and grind, finally add 0.05 part of stablizer and to regrind pulping.
Embodiment 2
20 parts of RO film high-salt wastewaters through pH regulator tank with hydrochloric acid adjustment pH to 7 after, then add 14 parts of water, together enter mill grind with 65 parts of coals, 0.9 part of dispersion agent, finally add 0.1 part of stablizer and to regrind pulping.
Embodiment 3
36 parts of RO film high-salt wastewaters adjust pH through pH regulator tank hydrochloric acid, then add 9.0 parts of water and 62.59 parts of coals, 1.3 parts of dispersion agents together enter mill and grind, and finally add 0.11 part of stablizer and to regrind pulping.
The parameter of the coal water slurry that each embodiment obtains sees the following form:
Combustion efficacy:
In upper table, it is the coal water slurry obtained in above-mentioned all embodiments that 100% swallow leads to sewage slurry.
By above list data, verify that the coal water slurry that high saline sewage makes meets coal water slurry quality criteria requirements, and boiler normally use and fume environment protection discharge meet Beijing's " emission standard of air pollutants for boilers " 21148-2007DB standard-required.
The above, it is only exemplary embodiments of the present invention, not technical scope of the present invention is imposed any restrictions, every according to technical spirit of the present invention to any trickle amendment implementing above to make, equivalent variations and modification, all still belong within the scope of technical scheme of the present invention.
Claims (4)
1. the sewage coal slurry prepared of high slat-containing wastewater, is characterized in that: the component comprising following proportioning, is mass parts:
High slat-containing wastewater 10 ~ 36 quality % part;
Stablizer 0.05 ~ 0.2 quality % part;
Dispersion agent 0.5 ~ 2 quality % part;
Coal dust 60 ~ 68 quality % part.
2. sewage coal slurry according to claim 1, is characterized in that, wherein with the weight of high slat-containing wastewater for benchmark, salts contg is 1 ~ 2%.
3. sewage coal slurry according to claim 1, is characterized in that, wherein said dispersion agent is FDN high efficiency water reducing agent; Described stablizer is Xylo-Mucine.
4. prepared the method for sewage coal slurry according to claim 1 by high slat-containing wastewater, it is characterized in that comprising the following steps:
Step 1:RO film strong brine passes through salt acid for adjusting pH to 6 ~ 7;
Step 2: the preparation of high slat-containing wastewater coal water slurry: waste water step 1 obtained, water, dispersion agent and coal together enter mill and grind, after add stablizer and to regrind pulping.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810738A (en) * | 2019-03-05 | 2019-05-28 | 安徽理工大学 | Using the method for BDO waste water preparation water-coal-slurry |
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810738A (en) * | 2019-03-05 | 2019-05-28 | 安徽理工大学 | Using the method for BDO waste water preparation water-coal-slurry |
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