AN ADVANCED COAL DESULFURIZATION PROCESS──SELECTIVE FLOCCULATION

Selective flocculation is an idea separation method to separate ultrafine pyrite from coal. A number of selective flocculation separation tests under different conditions have been done and the results are very encouraging. The results also show that desulfurization and deashing can be finished simultaneously in selective fIocculation process. It is an advanced coal desulfurization process.

THE APPLICATION OF REVERSE FLOCCULATION METHOD IN HIGH SULFUR COAL DESULFURIZATION

The reverse flocculation method for removing pyritic sulfur from high sulfor coals has been conceptually beveloped and investigated. The tentative tests on China high sulfur coals have shown that this advanced physical separation techaique can be very efficient in coal desulfurization, provided the process parameters are properly optimized. Under the circumsances of acquiring high coal recovery, the total sulfur rejection with four kinds of coal samples normally falls in tbe range 57% to 71 % by one-step reverse flocculation, and within the range 40% to 59% by one-step normal flocculation process.

提高选择性絮凝脱硫效果的途径

本文讨论了矿浆浓度、矿浆pH值、絮凝剂与煤样作用时间和煤系黄铁矿抑制剂对选择性絮凝脱硫效果的影响。

选择性絮凝在煤炭分选中的应用

介绍了选择性絮凝分选原理和选择性絮凝在煤炭分选中的应用研究。结果表明，该法既可对极细粒煤泥进行分选，又可制备洁净燃料，还可脱除单体解离的微细粒黄铁矿。用选择性絮凝对极细粒煤泥分选后，可得灰分１２％～１３％的精煤，可燃体回收率在９０％以上；两产品灰分差为５０％左右。制备洁净燃料时精煤灰分可小于３％，可燃体回收和产率均在９０％左右，最高值分别为９５．８８％和９４％。脱硫时，黄铁矿硫可从５．６９％降到０．５％以下，而且脱硫的同时可以脱灰，灰分可由１２．３％降至３％以下。

煤炭在洗选及燃烧过程中脱硫方法探析

硫是煤中的有害物质,在燃烧过程中会对环境造成极大的污染。本文重点介绍煤炭在洗选中除硫、煤在燃烧中除硫及煤在燃烧后烟气脱硫的方法。

燃煤脱硫技术

介绍了目前用于燃煤烟气脱硫的几种工艺,并给出了它们之间的比较,以供生产单位在选择脱硫工艺时参考。

燃煤电厂脱硫废水电絮凝处理工艺分析

电絮凝处理工艺在废水处理领域有着十分出色的表现,与传统工艺相比,它的絮凝活性更高,设备体积更小,操作也更加简单,是未来燃煤电厂脱硫废水处理工艺的重要组成部分。简单阐述了脱硫废水电絮凝处理工艺的流程和优点,并结合试验对影响处理效果的因素进行了分析和探讨,以此促进电絮凝处理工艺在燃煤电厂中的推广应用。