CN105062586A - Method for preparing coal-water slurry from coke slurry made of coke waste material - Google Patents
Method for preparing coal-water slurry from coke slurry made of coke waste material Download PDFInfo
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- CN105062586A CN105062586A CN201510407144.3A CN201510407144A CN105062586A CN 105062586 A CN105062586 A CN 105062586A CN 201510407144 A CN201510407144 A CN 201510407144A CN 105062586 A CN105062586 A CN 105062586A
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Abstract
The invention relates to a method for preparing coal-water slurry from coke slurry made of a coke waste material. The method comprises the following steps: taking coal slurry of which the concentration is equal to or larger than 48 percent and the coke slurry of which the concentration is equal to or larger than 70 percent respectively by mass metering, adjusting the proportion, putting the coal slurry and the coke slurry into a continuous stir extrusion mixer, thoroughly mixing the coal slurry and the coke slurry with a coal slurry additive and carrying out extrusion, and putting the extruded mixture into a configuration circulation tank for thorough mixing again. A coal slurry circulatory stirring pump is arranged outside the configuration circulation tank for circulatory stirring; after the quality percent of the mixed coal-water slurry reaches 58 to 70 percent, the mixed coal-water slurry is conveyed to a coal gasifier for use through a pump. The method has the advantages that the devices are less, the process is simple and reasonable; the implementation is easy; the investment cost is low; the operation is safe and reliable; the coke slurry and the coal slurry can be mixed completely, so that the coal-water slurry is high in slurry ability, the running cost is reduced, and the economic benefit is improved; due to the comprehensive utilization of the prepared coke slurry, not only can pollution be reduced, but also recycling use of waste materials is realized, and the environment benefit is obvious.
Description
Technical field
The present invention relates to a kind of Jiao made with coke waste and starch the method for mixing and preparing coal slurry of fetching water, be particularly applicable to gasification coal water slurry concentrate field in coal chemical technology.
Background technology
Gasification technology is divided into fixed bed, air flow bed and fluidized-bed, wherein entrained flow bed gasification technology is due to its clean environment firendly, do not produce organic wastewater with high concentration and waste gas, more and more paid attention to and developed, but reserves account for most low-rank coal but due to obtained coal water slurry mass concentration≤58%, and cause this environmental protection, efficient gasification technology is restricted, the coal water slurry index that coal water slurry gasification technical field requires: viscosity is 600 ~ 1200mPas, continuous flow, stability is 24h, syneresis rate is less than 7%, concentration is not less than 58%, 0.08255mm granularity accounts for 40% ~ 50%.The core of pulping technique is on the basis of suitable mobility, stability and the viscosity of maintenance, improves coal-water fluid concentration as far as possible.Improving slurrying concentration is one of focus of Modern Coal-based Chemical device concern.
But China is the energy general layout of oil-poor rich coal, because the low-rank coal degree of coalification of mass storage is low, and industrial to low-rank coal or employing fixed bed production synthetic gas, and this vapourizing furnace is seriously polluted, the waste water produced cannot thoroughly solve, and brings havoc to the environmental protection in region and ecology; Or adopt low-rank coal physique to utilize, the coal of this method process can improve mass concentration, but front pre-treatment energy consumption is high, treating processes consumption and waste greatly, cause gasification production cost to increase.
STRENGTH ON COKE manufacturing enterprise, calcium carbide manufacturing enterprise and other She Jiao enterprises, in process of production due to the purification of raw material, the pretreatment stages such as the screening of raw materials for production, produce a large amount of coke wastes, because coke waste is by dedusting charred ashes, screening coke powder and breeze composition, its granularity is little, airborne dust is large, calorific value is high, be unfavorable for recycling, serious environmental problem and waste problem is brought to manufacturing enterprise, general is all sell or mix coal at a bargain to burn, carbon content in breeze is high, its utility value is high, raw material just needed for coal water slurry, but at coke waste utilization technical elements, because the ground index of coke when grinding altogether with water is less than the half of coal, control water coal slurry concentration and size-grade distribution there is no method be applied to completely on industrialized unit.
Coal slurry and burnt mixed problem of starching, because current studies in China is only in simple combination treatment, the water coal slurry concentration made like this is unbalanced, because coal particle is different from the homogeneous degree of burnt particle, cause fill between two kinds of particles imperfect, cause size-grade distribution uneven, the problems such as concentration is unstable.
By the present invention with Coal and coke waste for coal water slurry made by raw material, then by pressurized-gasification furnace producing synthesis gas, and then the water coal slurry pressurized gasification technology synthesizing various Chemicals is the important path of a development clean coal chemical industry.
Summary of the invention
The invention solves current coal slurry and starch combination grain skewness, concentration instability, the particles filled not full problem such as closely knit with burnt, stablized to reach the water coal slurry concentration made by present method, the object of even particle size distribution.
The present invention is by mixed flow extrusion principle, coal particle and burnt particle are carried out water molecules and intergranular extruding in a narrow space, the slurry additive simultaneously added, the surface hydrophilicity of two kinds of particles is improved in small space, increase the surface tension of coal and burnt particle, reduce the interfacial tension between solid-liquid, reach fully moistening object, and the solid particulate disperseed after being extruded by mixed flow, can be made to be cross-linked with each other, form space structure, thus effectively stop solids precipitation, prevent the separation between solid-liquid, the homogeneity of coal slurry is kept in conveying or storage process.
The technical solution used in the present invention is: a kind of Jiao made with coke waste starches the method for mixing and preparing coal slurry of fetching water, and comprises mass flowmeter connected successively, complete mixing flow extruding mixing tank, configuration cycles groove, coal slurry transferpump.Coal slurry from mass percent >=48% of coal-grinding workshop section is starched respectively by after mass metrology and proportioning adjustment with mass percent 60% ~ 80% Jiao coming the burnt workshop section of autogenous grinding, in complete mixing flow extruding mixing tank, after the abundant extrusion of the slurry additive coming self-configuring workshop section, enter again in configuration cycles groove and again fully mix, configuration cycles groove outer setting coal slurry circulation stirring pump, carry out circulation stirring, mixed coal water slurry is delivered to coal gasifier by coal slurry transferpump and is used.
Jiao that described a kind of and coke waste is made starches the method for mixing and preparing coal slurry of fetching water, and its coal slurry controls as 8:2 ~ 1:9 with the burnt mass ratio starched.
Jiao that described a kind of and coke waste is made starches the method for mixing and preparing coal slurry of fetching water, its through extruding combination treatment after coal water slurry in size-grade distribution 0.08mm particle diameter account for 40%-50%.
Jiao that described a kind of and coke waste is made starches the method for mixing and preparing coal slurry of fetching water, and the coal water slurry mass percent concentration after it is configured circulation groove combination treatment reaches 58%-70%.
Jiao that described a kind of and coke waste is made starches the method for mixing and preparing coal slurry of fetching water, its coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, slurry additive adds by thousand/1-10 of total coal water slurry quality, and total coal water slurry quality refers to the quality summation of coal slurry and burnt slurry.
Jiao that described a kind of and coke waste is made starches the method for mixing and preparing coal slurry of fetching water, slurry additive described in it is the mixture of dispersion agent, stablizer, can be naphthalenesulfonate, sulfonated lignin, sulfonation humic acid salt, polycarboxylic acid series wherein one or more mixtures.
Beneficial effect of the present invention: by mixed flow extrusion principle, coal slurry is starched the method for mixing by a certain percentage and preparing coal slurry of fetching water with burnt, to solve in art methods coal slurry and starch combination grain skewness, concentration instability, the particles filled not full problem such as closely knit with burnt, reach the water coal slurry concentration made to stablize, the object of even particle size distribution.The present invention has that equipment is few, technique advantages of simple, easily implement, the advantage such as cost of investment is low, safe and reliable; Burnt slurry can fully mix with coal slurry, reaches the sludge forming performance that coal water slurry is high, decreases running cost, increases economic return, the comprehensive utilization of Jiao's slurry made by coke waste, not only decreasing pollution, and the recycling realizing waste, obvious environment benefit.The present invention is applicable to gasification coal water slurry concentrate field in coal chemical technology, and Jiao being specially adapted to make with coke waste starches to mix to prepare and fetches water in the method for coal slurry.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention process flow sheet;
In Fig. 1: 1 be coal slurry transferpump, 2 be coal slurry mass flowmeter, 3 be slurry additive mass flowmeter, 4 be complete mixing flow extruding mixing tank, 5 for burnt slurry mass flowmeter, 6 be configuration cycles groove, 7 be coal slurry circulation stirring pump, a is coal slurry, b for burntly to starch, c is slurry additive, d is qualified water coal slurry, e is circulation coal slurry.
Specific embodiments
With reference to accompanying drawing 1, a kind of Jiao made with coke waste starches the method for mixing and preparing coal slurry of fetching water, comprise the complete mixing flow extruding mixing tank 4, configuration cycles groove 6, the coal slurry transferpump 1 that are connected successively, complete mixing flow extruding mixer entrance place arranges coal slurry mass flowmeter 2, burnt slurry mass flowmeter 5, slurry additive mass flowmeter 3 respectively.Coal slurry a from mass percent >=48% of coal-grinding workshop section starches b respectively by after mass metrology and proportioning adjustment with mass percent 60% ~ 80% Jiao coming the burnt workshop section of autogenous grinding, in complete mixing flow extruding mixing tank, after the abundant extrusion of slurry additive c coming self-configuring workshop section, enter again in configuration cycles groove and again fully mix, configuration cycles groove outer setting coal slurry circulation stirring pump 7, carry out circulation stirring, mixed qualified water coal slurry d delivers to coal gasifier by coal slurry transferpump and uses.
Another embodiment difference is, coal slurry controls as 8:2 with the burnt mass ratio starched.
Another embodiment difference is, coal slurry controls as 4:6 with the burnt mass ratio starched.
Another embodiment difference is, coal slurry controls as 3:7 with the burnt mass ratio starched.
Another embodiment difference is, coal slurry controls as 2:8 with the burnt mass ratio starched.
Another embodiment difference is, coal slurry controls as 1:9 with the burnt mass ratio starched.
Another embodiment difference is, the size-grade distribution 0.08mm particle diameter in the coal water slurry after extruding combination treatment accounts for 40%.
Another embodiment difference is, the size-grade distribution 0.08mm particle diameter in the coal water slurry after extruding combination treatment accounts for 45%.
Another embodiment difference is, the size-grade distribution 0.08mm particle diameter in the coal water slurry after extruding combination treatment accounts for 50%.
Another embodiment difference is, is configured the coal water slurry mass percent concentration after circulation groove combination treatment and reaches 58%.
Another embodiment difference is, is configured the coal water slurry mass percent concentration after circulation groove combination treatment and reaches 62%.
Another embodiment difference is, is configured the coal water slurry mass percent concentration after circulation groove combination treatment and reaches 65%.
Another embodiment difference is, is configured the coal water slurry mass percent concentration after circulation groove combination treatment and reaches 68%.
Another embodiment difference is, is configured the coal water slurry mass percent concentration after circulation groove combination treatment and reaches 70%.
Another embodiment difference is, coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by 1/1000th of total coal water slurry quality.
Another embodiment difference is, coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by 3/1000ths of total coal water slurry quality.
Another embodiment difference is, coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by 5/1000ths of total coal water slurry quality.
Another embodiment difference is, coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by 8/1000ths of total coal water slurry quality.
Another embodiment difference is, coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by 10/1000ths of total coal water slurry quality.
Another embodiment difference is, slurry additive is naphthalenesulfonate.
Another embodiment difference is, slurry additive is sulfonation humic acid salt.
Another embodiment difference is, slurry additive is naphthalenesulfonate, lignosulfonic acid salt mixture.
Another embodiment difference is, slurry additive is naphthalenesulfonate, sulfonated lignin, sulfonation humic acid salt, polycarboxylic acid series mixture.
Following examples of the present invention, all coal the mixture stage, carry out mix and blend simultaneously, increase additive, control the concentration (note: in presents, all symbols and unit thereof all mark file specify according to " Chinese Coal Classification " GB/T5751-2009 and corresponding GB, portion) of coal water slurry.
Table 1 coal and coke waste property analysis
The sludge forming performance of the independent coal-grinding of table 2 and mill Jiao
Table 3 ratio mixture example
The gasification coal water slurry obtained after coke waste of the present invention and feed coal mixture, through being applied in Tsing-Hua University's coal slurry gasifier suitability for industrialized production, prove completely disastrously to burn, coal water slurry sludge forming performance is good, and burning thoroughly, meets need of production.
Claims (6)
1. Jiao made with coke waste starches the method for mixing and preparing coal slurry of fetching water, and it is characterized in that comprising mass flowmeter connected successively, complete mixing flow extruding mixing tank, configuration cycles groove, coal slurry transferpump; Coal slurry from mass percent >=48% of coal-grinding workshop section is starched respectively by after mass metrology and proportioning adjustment with mass percent 60% ~ 80% Jiao coming the burnt workshop section of autogenous grinding, in complete mixing flow extruding mixing tank, after the abundant extrusion of the slurry additive coming self-configuring workshop section, enter again in configuration cycles groove and again fully mix, configuration cycles groove outer setting coal slurry circulation stirring pump, carry out circulation stirring, mixed coal water slurry is delivered to coal gasifier by coal slurry transferpump and is used.
2. a kind of Jiao made with coke waste according to claim 1 starches the method for mixing and preparing coal slurry of fetching water, and it is characterized in that coal slurry controls as 8:2 ~ 1:9 with the burnt mass ratio starched.
3. a kind of Jiao made with coke waste according to claim 1 starches the method for mixing and preparing coal slurry of fetching water, and it is characterized in that the size-grade distribution 0.08mm particle diameter in the coal water slurry after extruding combination treatment accounts for 40%-50%.
4. a kind of Jiao made with coke waste according to claim 1 starches the method for mixing and preparing coal slurry of fetching water, and it is characterized in that the coal water slurry mass percent concentration after being configured circulation groove combination treatment reaches 58%-70%.
5. Jiao that a kind of and coke waste according to claim 1-4 is made starches the method for mixing and preparing coal slurry of fetching water, it is characterized in that: coal slurry and burnt quality proportioning of starching are by metered mass flow control concentration, and slurry additive adds by thousand/1-10 of total coal water slurry quality.
6. a kind of Jiao made with coke waste according to claim 1 starches the method for mixing and preparing coal slurry of fetching water, it is characterized in that described slurry additive is the mixture of dispersion agent, stablizer, can be naphthalenesulfonate, sulfonated lignin, sulfonation humic acid salt, polycarboxylic acid series wherein one or more mixtures.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340604A (en) * | 2000-08-25 | 2002-03-20 | 化学工业部西北化工研究院 | Process for preparing coke-water slurry to generate gas |
| JP2008231278A (en) * | 2007-03-22 | 2008-10-02 | Jfe Chemical Corp | Treating method of tar sludge, and charging method of tar sludge into coke oven |
| CN101323803A (en) * | 2008-07-16 | 2008-12-17 | 大连理工大学 | Method for preparing water coke slurry from lignite char |
| CN101851536A (en) * | 2009-03-31 | 2010-10-06 | 通用电气公司 | Be used to mix the method and apparatus of brown coal slurry and coke slurry |
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2015
- 2015-07-13 CN CN201510407144.3A patent/CN105062586A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340604A (en) * | 2000-08-25 | 2002-03-20 | 化学工业部西北化工研究院 | Process for preparing coke-water slurry to generate gas |
| JP2008231278A (en) * | 2007-03-22 | 2008-10-02 | Jfe Chemical Corp | Treating method of tar sludge, and charging method of tar sludge into coke oven |
| CN101323803A (en) * | 2008-07-16 | 2008-12-17 | 大连理工大学 | Method for preparing water coke slurry from lignite char |
| CN101851536A (en) * | 2009-03-31 | 2010-10-06 | 通用电气公司 | Be used to mix the method and apparatus of brown coal slurry and coke slurry |
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Application publication date: 20151118 |