我国合成洗涤剂生产废水治理技术研究

综述了近年来我国合成洗涤剂生产废水的特性;化学混凝法、泡沫分离法和生物接触氧化法处理合成洗涤剂生产废水的最佳工艺条件及其处理效果;工程应用实例及经济分析等。生产运行结果表明,处理后出水水质全面达到国家排放标准。化学混凝法,泡沫分离一混凝法其设备、流程简单、去除效率高、占地少,但运行费用较高。生物接触氧化－臭氧氧化法其出水可以回用、工艺先进、可靠、运行费用低、无二次污染。     

Foaming agent self-suction properties of a jet-type foam preparation device used in mine dust suppression

In this study, we introduce a jet-type foam preparation device for use in mine dust control, which can enhance the reliability and applicability of the foam production process compared with conventional foam generators. In order to elucidate the foaming agent self-suction properties of this novel foam generator, we used a self-built experimental setup to investigate the effects of the working pressure and outlet pressure on negative pressure (vacuum degree) during foaming agent suction, as well as the functional relationship between negative pressure and the foaming agent by adding parameters. We also studied the effects of the valve opening degree on the foaming agent flow rate and addition ratio. The results showed that the working pressure and outlet pressure affected the formation of negative pressure in a positive linear manner and a negative linear manner, respectively. Thus, the negative pressure increased linearly as the working pressure increased, whereas it decreased in a linear manner as the outlet pressure increased. There was also a quadratic relationship between the vacuum degree and foaming agent quantity with the piecewise characteristics of the growth process, where they increased slowly with a lower vacuum degree but increased rapidly with a higher vacuum degree. After creating a moderate negative pressure with the water jet, the foaming agent could be added automatically at a low flow rate with a low ratio via the regulating valve on the liquid suction hose. This study provides basic information that should facilitate the application of this novel foam preparation technique.     

洗发精废水的处理

采用吸附-泡沫分离方法对洗发精废水进行预处理，最大限度地降低了废水中有机物和表面活性剂的浓度并提高后续生化处理过程的稳定性，吸附剂采用廉价的膨润土，不仅处理效果好，而且运行费用低，易脱水。实验表明，对洗发精废水采用吸附-泡沫分离-SBR生化工艺，可以使处理后的废水达到国家排放标准（GB8978-1996）。     

Optimization and implementation of a foam system to suppress dust in coal mine excavation face

Foam technology is more efficient than water sprays for dust control in coal mines, but the traditional foam system is complex and poses problems related to foam production and spraying application, with high water consumption, unstable equipment and relatively low utilization efficiency of foam. This paper describes an optimized foam system which overcomes these disadvantages. The proposed foam generator has a self-suction unit that uses a turbulent-flow water jet to automatically draw in ambient air and foaming agent, thereby eliminating the need for compressed-air hoses and pipes. As well as simplifying the system, it solves the current problem of water backflow created by high-pressure compressed air. A refined foam spraying structure was developed for use in conjunction with an operating roadheader as it produces and diffuses dust. The structure consists of foam distribution supports and arc-fan nozzles. It can produce a more focused, continuous and uniform coverage at the source of the dust. The optimized system consumes less water and foaming agent, and achieves greater dust-suppression efficiency than methods in current use.     

泡沫在浆粕黑液生化处理中的产生、影响与去除

分析了泡沫对黑液处理过程中的影响和泡沫产生的原因，工程实际运行和试验证明，合并生化和物化处理，可有效去除起泡物质，控制泡沫的影响。     

Numerical simulation on foam ceramic blasting block device under the action of explosion transform

The responsive behaviour of the action of under explosion blasting block damaging device structure was investigated based on quality equation, energy conservation equation and thermodynamics equation, using the ANSYS finite element simulation and Euler form of momentum equation. This paper analyzed the destructive situation of the inside and outside of the foam ceramic device. The research shows that the finite element simulation results and the numerical calculation results agree, which provides important reference basis in the anti-explosion design and improvement of cut off the device for blasting.