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[来源:www.yuniguhua.com] [作者:淤泥固化] [日期:17-02-13]
超临界水氧化技术工艺流程为在超临界水氧化系统内,污泥首先进行预处理,配置成泥浆并将浓度调整至设计值,然后经过高效预热系统与来自高温反应后物料进行换热,达到反应温度后进入超临界反应装置。在超临界水状态下物料与氧气充分接触,物料中有机质与氧气在短时间内完成氧化反应,反应后产物作为热源给冷物料换热,多余热量可通过蒸汽回收,换热后的产物再经过分离系统实现气-液-固三相分离。 Supercritical water oxidation process in supercritical water oxidation system, firstly pretreated sludge, and configured to mud and adjust the concentration to the design value, and then after preheating system and from the high temperature reaction material for heat exchange, after reaching reaction temperature in supercritical reaction device. Good contact with material in the condition of supercritical water and oxygen, material of organic matter in complete oxidation reaction with oxygen in a short period of time, after the reaction product material heat as a heat source to the cold, excess heat through steam recycling, heat transfer products again after a separation system to realize the gas - liquid - solid three phase separation. 超临界水氧化技术原理为水的临界点是温度374.3℃、压力22.05MPa,如果将水的温度、压力升高到临界点以上,即为超临界水(SCW),其密度、粘度、电导率、介电常数等基本性能均与普通水有很大差异,表现出类似于非极性有机化合物的性质。因此,超临界水能与非极性物质(如烃类)和其他有机物完全互溶,同时超临界水还可以和空气、氧气、氮气和二氧化碳等气体完全互溶,而无机物特别是盐类在超临界水中的电离常数和溶解度则很低。目前新奥环保已在廊坊的污泥处理处置企业自建示范项目中将该技术进行了应用。 Principle of supercritical water oxidation technology is the critical point of water temperature is 374.3 ℃, pressure is 22.05 MPa, if the water temperature and pressure to the point above, namely for supercritical water (SCW), the density, viscosity, the basic performance such as conductivity, dielectric constant and there is a big difference between ordinary water, show the similar to the nature of the nonpolar organic compounds. Therefore, supercritical water and nonpolar substances, such as hydrocarbons and other organic matter complete miscibility, supercritical water at the same time can also and air, oxygen, nitrogen and carbon dioxide gas, such as complete miscibility, and inorganic substances, especially in the ionization constants of salts in supercritical water and the solubility is very low. At present, the new Austrian environmental protection has in langfang sludge disposal enterprise self-built will the technology application demonstration projects.

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