發(fā)布時間：2018-05-20 20:18

  本文選題：細(xì)粒煤 + 過濾脫水　； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：近年來,隨著采煤機(jī)械化程度的提高,采出煤中細(xì)粒煤含量大幅度增加,煤炭利用前的洗選加工是減少污染物排放量的經(jīng)濟(jì)有效手段,在煤炭洗選過程中,為將煤和矸石等雜質(zhì)解離又要進(jìn)行煤炭細(xì)粉碎,這就更加大了選煤廠中細(xì)粒煤的含量。細(xì)粒煤的流失不僅造成資源浪費(fèi),同時也會污染環(huán)境,因此要加強(qiáng)細(xì)粒煤的回收;現(xiàn)階段,我國選煤廠基本上采用的都是濕法選煤技術(shù)來對煤炭進(jìn)行分選,產(chǎn)品水分是評價煤炭質(zhì)量的重要指標(biāo)。洗選過程中細(xì)粒煤含量的增多,會嚴(yán)重惡化脫水效果,導(dǎo)致產(chǎn)品水分指標(biāo)難以保證,因此,對細(xì)粒煤脫水效果優(yōu)化的探究是當(dāng)前具有經(jīng)濟(jì)效益和現(xiàn)實(shí)意義的重大課題。本論文通過設(shè)計(jì)并自制的有機(jī)玻璃真空-氣壓兩階段聯(lián)合過濾脫水設(shè)備,對試驗(yàn)用煤分別進(jìn)行了細(xì)粒煤真空過濾脫水工藝條件優(yōu)化、細(xì)粒煤氣壓過濾脫水工藝條件優(yōu)化和真空-氣壓兩階段聯(lián)合過濾脫水工藝條件優(yōu)化,探究出在各不同過濾驅(qū)動力下的最佳操作工藝條件。同時,論文選取了7種不同類型的表面活性劑、6種聚丙烯酰胺以及聚合氯化鋁分別在各過濾驅(qū)動力的最佳操作工藝條件下對細(xì)粒煤進(jìn)行助濾脫水試驗(yàn),并對比其效果和規(guī)律,優(yōu)選出各助劑類型中的最佳藥劑種類及其用量;并對優(yōu)選出的各類型典型藥劑,在各過濾驅(qū)動力下進(jìn)行兩兩或三者聯(lián)合助濾及對比;還通過自制的新型復(fù)配助劑,進(jìn)行了各過濾驅(qū)動力下的助濾探究。最后,通過對各助濾藥劑進(jìn)行接觸角和表面張力的測定,從微觀機(jī)理上探究其對細(xì)粒煤的助濾作用;并對在不同過濾驅(qū)動力作用下形成的濾餅結(jié)構(gòu)特征進(jìn)行了研究,探索其規(guī)律。試驗(yàn)結(jié)果及各探究表明:1.通過單因素試驗(yàn)法,細(xì)粒煤真空過濾脫水最佳操作工藝條件為:煤漿濃度為300g/L,過濾真空度為0.06MPa,抽濾時間4min,細(xì)粒煤處理量為100kg/(m2·h),此時濾餅含水率為:26.08%;細(xì)粒煤氣壓過濾脫水工藝條件優(yōu)化結(jié)果為:煤漿濃度為450g/L,氣壓大小為0.6MPa,壓濾時間3min,細(xì)粒煤處理量為200kg/(m2·h),此時濾餅含水率為:22.03%;細(xì)粒煤真空-氣壓兩階段聯(lián)合過濾脫水工藝條件優(yōu)化結(jié)果為:煤漿濃度為550g/L,先用真空度為0.06MPa的負(fù)壓抽濾3.5min,再用0.6Mpa的氣壓加壓過濾2.5min,細(xì)粒煤處理量為150kg/(m2·h),由以上工藝條件可得濾餅含水率為18.37%。2.無論是在細(xì)粒煤真空抽濾、氣壓過濾以及真空-氣壓兩階段聯(lián)合過濾脫水作用下,選用的表面活性劑對試驗(yàn)用煤的助濾效果排序都為:非離子表面活性劑陰離子表面活性劑陽離子表面活性劑,且七種表面活性劑中效果最佳的為Span-80,用量僅為60g/t;選用的聚丙烯酰胺對試驗(yàn)用煤的助濾效果排序都為:陰離子陽離子非離子,且在每種同一類型不同分子量的聚丙烯酰胺助濾時,分子量1500萬的總是比分子量600萬的助濾效果要好,過濾后濾餅含水率更低;自制的復(fù)配助劑中Span-80∶煤油的最佳復(fù)配比例為1∶30,且復(fù)配藥劑各組分間發(fā)生了協(xié)同作用。3.用優(yōu)選出的典型藥劑分別在各過濾形式最佳工藝操作條件下進(jìn)行聯(lián)合助濾試驗(yàn)都表明,在藥劑兩兩聯(lián)合助濾時,Span-80+HPAM(1500萬)組合助濾效果最優(yōu);三種典型藥劑組合后比任意兩種典型藥劑的組合助濾效果都要好。4.對真空-氣壓兩階段聯(lián)合配以藥劑對細(xì)粒煤脫水極限試驗(yàn)探究表明:當(dāng)用真空-壓力兩階段聯(lián)合配以適當(dāng)?shù)乃巹┗蚱浣M合時,細(xì)粒煤漿脫水極限能夠達(dá)到使濾餅含水率降至13%左右。
[Abstract]:In recent years, with the improvement of mechanization of coal mining, the content of fine coal in coal is greatly increased. The washing process before coal utilization is an economical and effective means to reduce the emission of pollutants. In the process of coal washing, the removal of the impurities such as coal and gangue and the fine pulverization of coal in the process of coal washing, which makes the fine coal in the coal preparation plant bigger The loss of fine coal not only causes the waste of resources, but also pollutes the environment, so it is necessary to strengthen the recovery of fine coal. At the present stage, the coal preparation plant in our country basically adopts the wet method of coal preparation to separate the coal, and the moisture of the product is an important index to evaluate the quality of the coal. It is difficult to guarantee the water index of the product. Therefore, the research on the optimization of the effect of the fine coal dehydration is a major issue with economic and practical significance. This paper has been designed and prepared by the two stage combined filtration and dewatering of the vacuum pressure of the organic glass, and the fine coal vacuum is carried out for the test coal. Optimization of filtration and dehydration process conditions, optimization of fine coal pressure filtration dehydration process conditions and optimization of the vacuum pressure two stage combined filtration process conditions are optimized to explore the optimum operating conditions under various driving forces of various filters. At the same time, 7 different types of surface active agents, 6 kinds of polyacrylamide and polychlorination are selected. Under the optimum operating conditions of the filter driving force, aluminum was tested for filtration dehydration of fine coal, and its effect and law were compared, and the best agent types and their dosage were selected, and 22 or three of the selected typical agents were combined and compared under the driving force of each filter. In the end, through the determination of the contact angle and surface tension of each filter agent, the filtration effect on fine coal is explored from the micro mechanism, and the structure characteristics of the filter cake formed under the action of different filter driving forces are studied and the rules are explored. The experimental results and various inquisition show that: 1. through single factor test, the optimum operating conditions of fine coal vacuum filtration dehydration are: coal slurry concentration 300g/L, filtration vacuum degree 0.06MPa, filtration time 4min, fine coal treatment amount of 100kg/ (m2. H), at this time the water content of filter cake is 26.08%; fine coal pressure filtration dehydration process conditions optimization junction The results are as follows: the coal slurry concentration is 450g/L, the pressure is 0.6MPa, the pressure filtration time is 3min, the fine coal is treated with 200kg/ (m2. H), and the water content of the filter cake is 22.03%. The optimization result of the two stage combined filtration dehydration process of fine coal vacuum pressure pressure is that the coal slurry concentration is 550g/L, and the vacuum degree is the negative pressure of 0.06MPa, then the 0.6Mpa gas is used. Pressure pressure filtration 2.5min, fine coal treatment amount of 150kg/ (m2. H), from the above process conditions can be obtained the cake moisture content is 18.37%.2., whether it is in fine coal vacuum filtration, pressure filtration and vacuum pressure two stages combined filtration dehydration effect, the selected surface active agent for the testing of coal for the filtration effect order is: nonionic surface live. The cationic surfactant of the anionic surfactants, and the best effect of the seven surfactants, is Span-80, only 60g/t. The selection of polyacrylamide on the filtration effect of the test coal is not ion cation, and the molecular weight is 15 in each kind of polyacrylamide with the same type of different molecular weight. 00 ten thousand is always better than molecular weight 6 million, and the water content of filter cake is lower after filtration; the optimum compound ratio of Span-80: kerosene is 1: 30 in the homemade compound auxiliary agent, and the synergistic effect of the compound agent.3. is combined with the optimum process operation conditions of each filtration form, respectively. The filter aid test shows that the combination of Span-80+HPAM (15 million) is the best for the combination of Span-80+HPAM (15 million), and the combination of the three typical medicaments is better than the combination of any two typical medicaments, and the combination of the vacuum pressure two stage combined with the medicament to the fine coal dehydration limit test shows that the two order of vacuum pressure is used. With the combination of appropriate agents or combinations, the moisture limit of the fine coal slurry can reach about 13% of the moisture content of the cake.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD94

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張英杰;鞏冠群;謝廣元;謝領(lǐng)輝;;細(xì)粒煤脫水研究綜述[J];中國煤炭;2010年06期

2 郭玲香;新型陽離子聚合物對細(xì)粒煤的助濾作用研究[J];中國礦業(yè);2000年03期

3 夏暢斌,黃念東,何緒文;表面活性劑對細(xì)粒煤脫水的試驗(yàn)研究[J];煤炭科學(xué)技術(shù);2001年03期

4 石常省,謝廣元,歐陽永明;十字流過濾在細(xì)粒煤脫水中的應(yīng)用研究[J];煤炭技術(shù);2003年06期

5 戚家偉,朱書全,王仁哲,姚春彥,崔廣文;選擇性雙向絮凝技術(shù)分選極細(xì)粒煤的試驗(yàn)研究[J];選煤技術(shù);2004年03期

6 朱書全,戚家偉,姚春彥,解維偉;提高選擇性雙向絮凝分選極細(xì)粒煤效果的途徑[J];選煤技術(shù);2004年04期

7 丁志杰;王祖訥;;系列藥劑量分選超細(xì)粒煤試驗(yàn)研究[J];潔凈煤技術(shù);2005年04期

8 焦紅光;諶倫建;鐵占續(xù);;細(xì)粒煤重選設(shè)備的技術(shù)現(xiàn)狀與分析[J];煤炭工程;2006年01期

9 唐利剛;謝廣元;石常省;;細(xì)粒煤脫硫降灰的途徑探討[J];選煤技術(shù);2007年01期

10 凌麗偉;;細(xì)粒煤干燥技術(shù)及應(yīng)用[J];中國煤炭工業(yè);2007年07期

相關(guān)會議論文 前2條

1 董憲姝;杜圣星;;高灰細(xì)泥細(xì)粒煤浮選技術(shù)進(jìn)展[A];紀(jì)念中國煤炭學(xué)會成立50周年暨2012全國選煤學(xué)術(shù)交流會論文集[C];2012年

2 石常省;張敏;劉靜;;高灰極難選細(xì)粒煤泥的分選研究[A];2011年全國選煤學(xué)術(shù)交流會論文集[C];2011年

相關(guān)博士學(xué)位論文 前4條

1 張博;基于微波能量與介質(zhì)協(xié)同作用的細(xì)粒煤磁選脫硫機(jī)理研究[D];中國礦業(yè)大學(xué);2015年

2 于曉東;小于6mm細(xì)粒煤復(fù)合式干法分選特性研究[D];中國礦業(yè)大學(xué);2017年

3 王立艷;褐煤中微生物篩選及膠紅酵母對細(xì)粒煤的表面改性作用[D];中國礦業(yè)大學(xué)(北京);2012年

4 劉愛榮;氣體輔助細(xì)粒煤離心力場分選規(guī)律研究[D];太原理工大學(xué);2014年

相關(guān)碩士學(xué)位論文 前3條

1 王輝;低灰細(xì)粒煤泥絮凝浮選試驗(yàn)研究[D];中國礦業(yè)大學(xué);2016年

2 武樂鵬;不同電解質(zhì)對細(xì)粒煤電化學(xué)脫水效果的影響研究[D];太原理工大學(xué);2010年

3 李立功;彬長細(xì)粒煤浮選—絮凝工藝組合試驗(yàn)研究[D];西安科技大學(xué);2011年

，

本文編號：1916079