顾桥选煤厂商品煤质量动态控制研究

分析了顾桥选煤厂动力煤生产流程和末煤分流调节系统功能,提出对末煤分流调节系统进行组合优化的必要性。在充分考虑生产工艺和厂房空间的基础上,设计了可对末煤入选量进行预测的动力煤选煤厂商品煤质量动态控制系统,研制了可实现入选量自动控制的新型分流装置。运用动力煤选煤厂商品煤质量动态控制系统后,顾桥选煤厂产品灰分和要求灰分最大误差由0.67%降至0.37%,最小误差也由0.09%降为0,完全符合±0.5%的误差调整要求。控制系统的运用使末煤入选量实现了自动加减,入选量控制波动范围由原来的±80t减少至现在的±30t;减少了现场职工的劳动强度,末煤入选量控制更加合理,提高了系统的稳定性;商品煤质量可根据用户要求灵活调节,实现无极调灰。

Commercial coal dynamic quality management system in Guqiao coal preparation plant

Analyse the production process of steam coal and slack coal separating and regulating system in Guqiao coal preparation plant. The results show that it＇s necessary to combine and optimize the slack coal separating and regulating system. Based on the production process and workshop scale, evaluate the washing quantity of slack coal with commercial coal dynamic quality management system. The new type separating system can automatically control washing quantity. Duo to the new system, the maximum error between product ash and requested ash decrease from 0. 67 percent to 0. 37 percent, the minimum error decrease from 0. 09 percent to 0. The adjustment error is requested in the range of -0.5 percent to 0. 5 percent. So the new system meets the demand. The fluctuation range of washing quantity decrease from ＋ 80 tons to-＋ 30 tons, reduce the labor intensity, improve the stability of system, the commercial coal quality can be adjusted as requested.