摘要熔融石英在国民经济的方方面面发挥着重要应用。本文主要围绕熔融石英生产行业普遍耗能高且热能浪费严重的问题，具体做了如下工作：

（1）对熔融石英生产工艺流程及能耗进行调研，最后得出整体能耗情况，由此得出结论：对于熔融石英生产过程，能耗集中在加热环节，约占总能耗的98%，太阳能利用、节能必须在加热环节上入手。84185

（2）分析了现有光热技术，确定其与石英生产相结合的途径。本文设计了太阳能温室-热泵干燥系统，并对其配件进行设计并完成初步的选型。利用软件对热泵系统进行能效分析，得到开、闭式热泵系统能效分别为2。42、2。62；对联合干燥系统进行理论能效计算，得出最高能效为5。82。

（3）本文利用CFX对熔融石英出料情况进行仿真。对比使用空气、水雾作为热能回收介质时的结果，得出结论：空气本身温度变化小，回收价值低；而水雾回收高效、能量密度大，能很好的利用于物料预热等环节，回收能量利用率高，可达80%左右。

毕业论文关键词 熔融石英  光热利用  太阳能温室-热泵联合干燥系统  余热回收 模拟仿真

毕业设计说明书外文摘要

Title   Feasibility Study of Solar Thermal Applications in Fused Silica Production Process                                           

Abstract Fused silica plays an important role in many aspects in the national economy。 This paper mainly focuses on the problem of highly energy consumption and seriously heat waste in the fused silica production industry and conducts the following work: 

With research of the fused silica production processes and their energy consumption, situation of the whole process can be obtained。 For the fused silica production process, energy consumption is concentrated in the heating segment, which could be up to 98% of all。 Thus, solar energy utilization and energy conservation must start on the heating process。 

After analyzing the existing solar thermal technology, identifying ways of combining fused quartz production, a solar greenhouse - heat pump combined drying system is designed and its accessories calculations and preliminary selections are completed。 By using software for heat pump system energy efficiency analysis, open pump system and closed pump system efficiency were 2。42,2。62, respectively。 The combined drying system's maximum theoretical thermal efficiency is 5。82。

In this paper, CFX is used for fused silica discharge case simulation。 By comparing performance of air and water spry as a medium of heat recovery, we can draw some conclusions。 Air's temperature raises small itself during the process, and its low energy density causes difficulty when using it。 At the same time, water spray recycle energy fast and efficiently。 It can be well utilized for preheating material and other sectors, with energy recovery efficiency up to about 80%。

Keywords  fused quartz  solar energy  Solar greenhouse- Heat Pump Drying System  waste heat recovery  simulation 

目 次

1 引言 1

1。1 项目背景 1

1。2 国内外研究现状综述 2

1。3 项目意义 4

1。4 本设计拟开展的主要工作 5

2 石英熔融工艺过程分析 6

2。1 工艺流程分析 6

2。2 能耗分析