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随着生产技术的发展和对产品质量控制的需要,近几年来,在大、中型水泥生产过程中,对窑尾出口气体进行取样分析以对产品质量进行监控,已成为非常重要的手段。窑尾烟气的出口温度通常在900～1200℃,短时间内可达1300℃,因此对长期工作在该温度下的取样管,对其耐热性和机械强度等方面均要求较高,国内目前使用的高温取样管还全靠进口。热管是利用管内工作液体在相变过程所吸收和放出的潜热进行传热,故有极高的传热能力。若用热管制成取样管,将取样管在炉内部分所受到的热量通过热管传递到炉外加以冷却,使整个取样管的温度控制在一个较低的水平(<700℃),则普通不锈钢就可作为取样管的材料,使问题得到解决。
With the development of production technology and the need for product quality control, in recent years, it has become a very important measure to sample and analyze the gas at the outlet of the kiln to monitor the product quality during the production of large and medium-sized cement. The exit temperature of the kiln flue gas usually ranges from 900 to 1200 ° C and can reach 1300 ° C in a short time. Therefore, the long-term working temperature of the sampling pipe requires high heat resistance and mechanical strength, and the domestic The current high-temperature sampling tube also rely entirely on imports. Heat pipe is the use of the working fluid pipe in the phase change process of absorption and release of latent heat for heat transfer, it has a very high heat transfer capability. If the heat pipe made of sampling tube, the sample tube in the furnace part of the heat received by the heat pipe to the outside of the furnace to be cooled, so that the entire sample tube temperature control at a lower level (<700 ℃), the general stainless steel Can be used as a sample tube material, so that the problem can be solved.