Research on Synthesizing Disperser with Fraction of Anthracene Oil for Coal Water Slurry

Dec. 200Journal of China University of Mining TechnologyVol. 13 No. 2Research on Synthesizing Disperserwith fraction of anthracene oil forCoal Water SlurryWU Guo-guang(吴国光), GUO Zhao-bing(郭照冰)2, wU Jian-jan(武建军)1Xie Qiang(解强)3, WANG Xiao-chun(王晓春)(1. School of Chemical Engineering and Technology, CUMT Xuzhou, Jiangsu 221008, China2. School of Environment, Nanjing University, Nanjing, Jiangsu 210093, China;3. School of Chemical and Environmental Engineering, CUMT, Beijing 100083, China)Abstract: Experiment of synthesizing a disperser for coal water slurry (CwS) by using fractions of anthracene oilfrom high-temperature coal tar was performed. The orthogonal testsed to investigate the influence oftemperature,time, quantity of sulfonation agent and condensation agent and the interaction of these factors onproperties of the disperser. The result shows that the influence of temperature, time, quantity of sulfonation agentnd condensation agent, and the interaction of sulfonation time and sulfonation agent has a significant influence onthe properties of disperser. The optimal condition of synthesis is that in 150g of the fractions of anthracene oil, 40mL of sulfonation agent is added and sulfonated for 3 h at 130C, then, 10 mL of condensing agent is added andcondensated for 1.5 h at 115cCLC number: TQ 519 Document code: a Article ID: 1006-1266(2003)02-0145-06Coal water slurry (CwS) is a new type of coalCoal from Pangzhuang Mining Area, Xuzhoubased clean fuel for oil. its technology of producing Coal Mine Group was used in the experiment 8JCWS has attracted much attention of scientists all (Table 1). The coal belongs to bituminous coal of aoverthe world. 1, 2] It is well known that a kind of lower-medium rank. It has a low inherent moisturechemical disperse agent with good properties is one and a high H. G. index, which is easy to be groundof key factors preparing high quality of CWS. [3,4 into fine coalsSo, many researchers(3. 5-7) have studied thea given quantity of lump coal was put into apreparation of the disperser for Cws. But few crusher (SP-100 X 100), in which the lump coresearches on synthesizing disperser for CwS from was crushed into particles of less than 3mm. Thenfractions of anthracene oil have been done. The the particles were put into an oven drying for 3 h atpurpose of the research is to prepare the disperser by 105C, devided into two parts with the sameusing the fraction of anthracene oil which is easy to weight, ground in a rod mill XMB-70be obtained and examine its properties after respectively. One part was ground for 50 min, anpreparing CWS, so as to determine the optimal the other for 2 h. Then they were mixed togethernesis conditionthus a reasonable distribution of particle size of coalwas ob1 Experimentwhich could meet the requirement of中国煤化工1. 1 Property and preparation of coal sampleCNMHGBiography WU Guo-guang(1963-), male, from Changzhou, Jiangsu Province, associate professor, Ph. D, engaged in the research orclean coal technolog.146Journal of China University of Mining TechnologyVol 13 No. 2Table 1 Properties anal ysis of raw coalsoftdef1.3210.7936.5483.434.701.30150064.811.2 Synthesis of disperser1)Main material1. 3 Design of experimentAnthracene oil is from Jining Coal ChemicalThere are many factors influencing on theInstitute of Shangdong Lukang Group. The main synthesis of disperser. Considering the simplicityedients are anthracene, phenanthrene and some and efficiency of technique; the variety of technical2-3 cyclic aromatics. The others are chemically pure parameters is simplified. Factors, such assulfuric acid, formaldehyde and sodium hydroxide.sulfonation temperature(A), time(B), dosage of2) Main apparatusagent(C), condensation temperature(D), andFlask with four holes, condensing tube, dosage of condensation agent(e) are investigated inthermometer, separatory funnel, Zht type of detail. Levels of factors are selected based onelectric heater automatically constant temperature chemical properties of anthracene and phenanthreneand dynamical stirring equipment were used in the (Table 2)Table 2 The level and factorsfsallonationautonationV(H2SO4)feoodensstionV(HCHO)9025130be seen from Table 2 that it is an the experiment of synthesizing disperser for CwSone 4-level factor and four 2-level can be obtained based on factor levels in Table 2,factors. Considering the interaction of factors(Ax from which 16 kinds of dispersers for CWS can bB, AXC, BXC), an orthogonal test table is used. prepared and their properties, corTable 3, a test table Lis(4 2), or the schema ofTable 3 The orthogonal test L16(4x 212)A×BBXC1230121112211222212121221222112212112121中国煤化工2CNMHG22wU Guo-guang et alResearch on Synthesizing Disperser with Fraction of1471. 4 Preparation of CWSwas used as an index for assessment. The value ofa given quantity of disperser was dissolved in SVC is the index to compare the quality of CwS orwater. A certain quantity of fine coal was added to assess the properties of disperser. It can begradually while it was being stirred. Then the defined as the concentration under a certainixture was stirred by 5 min at 1200 r/minviscosity. The correspondent dots were drawn with1.5 Test of viscositya longitudinal coordinate for viscosity and aThe NXS-11A rotary viscosimeter was used to horizontal coordinate for concentration. Then thetest the viscosity of CwS, with a sheer rate of fitting equation can be obtained by the fitting curve.100s-1at24℃Then the concentration in accordance with a1.6 Test of coal content 1Jviscosity of 1200 Mpa.s was calculated, which is1+0. 1 g of CWS sample was weighed and put the value of SVC. 16 samples of CwS were madeinto a known weight glass bottle with a cover. The using 16 kinds of disperser prepared based on Tableottle was uncovered and put it into an oven at 3. The dosage of disperser for each CWS sample is105C, then the bottle was taken out of the oven, kept 1% and it is a mixture ofanthracene ocovered instantly, cooled for a moment. The bottle disperser and naphthalene oil disperser (1 :1).Awas put into a drier and then weighed after cooling fitting equation is obtained by the unified regressiondown to the room temperature to determine the analysis according to the experiment data, and thensolid content and calculate the actual coal content in SVC values are calculatedCws according to the following formula. ThThe svc values were filled into table 3 forthe mass fraction of coalvariance analysis. The sum of average variance of Aw (C)=1/(a+1)Xw(s)(1) XB is comparatively small. So, in order to improvew(C)refers to the actual mass fraction of coal, the result of inspection, Saxb was referred to the%i w(s)refers to tested mass fraction of solid, 2sum of these two items getting a variance analysisa refers to the amount of disperser,result (Table 4). From the unified regression and1.7 FTIR spectrum analysisvariance analyses, it can be concluded that in theA small amount of disperser powder (less than synthesis of anthroic oil disperser, the influence of0.053 mm in diameter synthesized under an the amount of sulfonation agent, sulfonation timewas used to have a FTiRTable 4 Variance anal ysisspectrum test using the A360 FourierResource Variance Degree of Average value of FTransform Infrared Spectrophotometer, so as toascertain the main function groups and provide the3.00251.000811.28theoretical basis for a further study of the0.90250.902510.17mechanism of disperser.2 Result and AnalysisBXC0,495.520.30250.30253.412. 1 Synthetic experiment of disperser16.23The contents of anthracenphenanthreneError0.355and naphthalene are quite low in the fraction ofSummation 9. 4375anthracene oil, resulting in a low content ofeffective ingredients in anthracene oil disperser. IrNotes:Foos(3,4)=6.59;F00s(1,4)=7.71;F0(3,4)=4.19;中国煤化工05;F0(1,4)=1.81evaluating the properties of the disperser, the totalamount of disperser can be fixed to 1% percentCNMH Once on index: If Fo. 8