多孔介质除湿与再生特性研究
发布时间：2019-06-24 09:28
【摘要】：在一些环境中对湿度有特定的要求，如制药类，食品类，电器制作类，轻工类等，对湿度的要求严格，常常相对湿度在10%以下，因此，对除湿空调领域提出了更高的要求。固体除湿空调除湿的区域可以利用低品位热源，如太阳能，工业废热等，节约了大量能源，无压缩机的使用，因此解决了氟利昂对大气臭氧层污染的问题。在固体吸附剂中分子筛及活性氧化铝由于自身的吸附特性对空气的深度除湿具有一定的优势。 通过实验室以电厂粉煤灰为主要原料，氢氧化钠为活化剂，通过碱熔融水热法合成沸石分子筛和以硝酸铝与碳酸氢铵为主要原料通过溶胶凝胶法合成的活性氧化铝，，对两种材料的孔径及比表面积进行分析，得到制作材料的最佳条件，并对其热重分析，设计装置发挥其最佳的除湿状态。建立试验台进行低温再生的多孔工质空气除湿实验系统，该系统由多孔固体除湿再生系统、湿度、温度、压力监测系统及其他附属调节设备组成，试验以特定温湿的空气为处理对象，对吸附（再生）柱进出口及柱内测点进行数据监测，得到湿度、温度、压降工作参数，分析吸附柱压降的变化对吸附除湿的影响情况，同时分析得到进口空气含湿量、温度、流量的变化对其多孔工质除湿与再生工作特性的影响。 实验系统可以对多孔吸附介质物性参数和系统多工况运行调节工作特性展开实验测试工作，深入研究多孔工质除湿及再生过程的工作特性和传热传质机理，将两种材料分别用于空气调节系统除湿和再生试验，并和目前常用除湿剂4A分子筛比较，在低温低湿，常温低湿及常温高含湿量空气环境的除湿性能进行分析，同时对三种干燥剂进行实验对比，得到干燥剂对于深度除湿的情况，分析实验室制备的活性氧化铝的除湿性能较好，制备的沸石分子筛在初始阶段的除湿速率快，吸附效果好，稳定阶段由于自身比表面积等受限同活性氧化铝及4A分子筛的除湿效果有一定的差距。 对沸石分子筛、活性氧化铝及4A分子筛进行再生性能测试，用电加热器对空气进行加热对材料进行脱附研究，确定材料的再生温度范围，另外在多个完整的工况下测得再生温度下各干燥剂的除湿效率进行评价。得到在系统中三种材料的最佳再生温度及此时系统的效率。同时在通过热重分析及再生实验的测试，发现实验室制备的活性氧化铝可以采用低温热源做驱动力，再生阶段空气进口温度为57.2℃时活性氧化铝较其他两种干燥剂的效率更高。
[Abstract]:In some environments, there are specific requirements for humidity, such as pharmaceutical, food, electrical equipment, light industry, etc., the requirements for humidity are strict, and the relative humidity is often below 10%. Therefore, higher requirements are put forward in the field of dehumidification air-conditioning. The area of the solid dehumidifying air-conditioning dehumidification can utilize low-grade heat sources such as solar energy, industrial waste heat and the like, so that a large amount of energy is saved, the use of the compressor is avoided, and the problem of the pollution of the atmospheric ozone layer by Freon is solved. And the molecular sieve and the active alumina in the solid adsorbent have certain advantages for the deep dehumidification of the air due to their own adsorption characteristics. The active oxidation of the zeolite molecular sieve and the main raw materials of aluminum nitrate and hydrogen carbonate as the main raw materials by the sol-gel method was studied by using the coal ash of the power plant as the main raw material and the sodium hydroxide as the activator. The pore size and specific surface area of the two materials are analyzed, the optimum conditions of the materials are obtained, and their thermogravimetric analysis is carried out. The invention relates to a porous working medium air dehumidification experimental system for low-temperature regeneration of a test bed, which consists of a porous solid dehumidifying and regeneration system, a humidity, a temperature, a pressure monitoring system and other auxiliary adjusting equipment, Data monitoring is carried out on the inlet and outlet of the adsorption (regeneration) column and the measuring point in the column to obtain the working parameters of humidity, temperature and pressure drop, and the influence of the change of the pressure drop of the adsorption column on the adsorption and dehumidification is analyzed, Influence of the change of degree and flow on the dehumidification and regeneration of its porous working medium The experimental system can carry out the experimental test on the physical property parameters of the porous adsorption media and the operating characteristics of the system multi-working conditions, and further study the working characteristics and heat transfer of the porous working medium in the process of dehumidification and regeneration. The two materials are respectively used in the dehumidification and regeneration test of the air-conditioning system, and the dehumidification performance of the air environment with low-temperature and low-humidity, normal-temperature low-humidity and normal-temperature high moisture content is analyzed, According to the comparison, the condition of the drying agent for the depth dehumidification is obtained, the dehumidification performance of the active alumina prepared by the laboratory is better, the dehumidification rate of the prepared zeolite molecular sieve in the initial stage is fast, The effect is good, and the stabilization stage has a certain effect on the dehumidifying effect of the active aluminum oxide and the 4A molecular sieve due to the limited self-specific surface area and the like the method comprises the following steps of: carrying out regeneration performance test on the zeolite molecular sieve, the active aluminum oxide and the 4A molecular sieve, the temperature range of raw materials, and the dehumidification effect of each drying agent under the regeneration temperature is measured under a plurality of complete working conditions The rate is evaluated. The optimum regeneration temperature of the three materials in the system and this time The efficiency of the system is high. At the same time, in the test of thermogravimetric analysis and regeneration experiment, the active aluminum oxide prepared by the laboratory can be used as a driving force by adopting a low-temperature heat source, the air inlet temperature of the regeneration phase is 57.2 DEG C, and the active aluminum oxide is more than two other drying agents
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU834.9
本文编号：2504949
[Abstract]:In some environments, there are specific requirements for humidity, such as pharmaceutical, food, electrical equipment, light industry, etc., the requirements for humidity are strict, and the relative humidity is often below 10%. Therefore, higher requirements are put forward in the field of dehumidification air-conditioning. The area of the solid dehumidifying air-conditioning dehumidification can utilize low-grade heat sources such as solar energy, industrial waste heat and the like, so that a large amount of energy is saved, the use of the compressor is avoided, and the problem of the pollution of the atmospheric ozone layer by Freon is solved. And the molecular sieve and the active alumina in the solid adsorbent have certain advantages for the deep dehumidification of the air due to their own adsorption characteristics. The active oxidation of the zeolite molecular sieve and the main raw materials of aluminum nitrate and hydrogen carbonate as the main raw materials by the sol-gel method was studied by using the coal ash of the power plant as the main raw material and the sodium hydroxide as the activator. The pore size and specific surface area of the two materials are analyzed, the optimum conditions of the materials are obtained, and their thermogravimetric analysis is carried out. The invention relates to a porous working medium air dehumidification experimental system for low-temperature regeneration of a test bed, which consists of a porous solid dehumidifying and regeneration system, a humidity, a temperature, a pressure monitoring system and other auxiliary adjusting equipment, Data monitoring is carried out on the inlet and outlet of the adsorption (regeneration) column and the measuring point in the column to obtain the working parameters of humidity, temperature and pressure drop, and the influence of the change of the pressure drop of the adsorption column on the adsorption and dehumidification is analyzed, Influence of the change of degree and flow on the dehumidification and regeneration of its porous working medium The experimental system can carry out the experimental test on the physical property parameters of the porous adsorption media and the operating characteristics of the system multi-working conditions, and further study the working characteristics and heat transfer of the porous working medium in the process of dehumidification and regeneration. The two materials are respectively used in the dehumidification and regeneration test of the air-conditioning system, and the dehumidification performance of the air environment with low-temperature and low-humidity, normal-temperature low-humidity and normal-temperature high moisture content is analyzed, According to the comparison, the condition of the drying agent for the depth dehumidification is obtained, the dehumidification performance of the active alumina prepared by the laboratory is better, the dehumidification rate of the prepared zeolite molecular sieve in the initial stage is fast, The effect is good, and the stabilization stage has a certain effect on the dehumidifying effect of the active aluminum oxide and the 4A molecular sieve due to the limited self-specific surface area and the like the method comprises the following steps of: carrying out regeneration performance test on the zeolite molecular sieve, the active aluminum oxide and the 4A molecular sieve, the temperature range of raw materials, and the dehumidification effect of each drying agent under the regeneration temperature is measured under a plurality of complete working conditions The rate is evaluated. The optimum regeneration temperature of the three materials in the system and this time The efficiency of the system is high. At the same time, in the test of thermogravimetric analysis and regeneration experiment, the active aluminum oxide prepared by the laboratory can be used as a driving force by adopting a low-temperature heat source, the air inlet temperature of the regeneration phase is 57.2 DEG C, and the active aluminum oxide is more than two other drying agents
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU834.9
【参考文献】
相关期刊论文 前10条
1 任书霞;杨丹;;溶胶-凝胶法在纳米粉体制备中的应用[J];中国粉体技术;2006年01期
2 赵云,施明恒;太阳能液体除湿空调系统中除湿剂的选择[J];工程热物理学报;2001年S1期
3 蒋祚贤;代彦军;王如竹;;转轮除湿器微通道形状对除湿性能的影响[J];工程热物理学报;2009年01期
4 崔群,陈海军,姚虎卿;固体吸附除湿剂的制备及性能研究[J];化工时刊;2001年11期
5 曹建劲;沸石改性及其吸附性能研究[J];化工矿物与加工;2002年12期
6 方玉堂;郭敬花;李大艳;高学农;;稀土改性分子筛的表征与性能[J];化工学报;2011年06期
7 周洪峰;张兴彪;王雪章;潘新祥;;船舶余热固体吸附式制冷可行性分析和模拟实验系统设计[J];节能技术;2007年03期
8 李海陕;;干燥剂在日常生活中的应用探析[J];科技风;2009年21期
9 张立志,江亿;膜法空气除湿的研究与进展[J];暖通空调;1999年06期
10 陆燕海;;对干燥剂选用的一些探讨[J];化学教学;2013年04期
本文编号：2504949
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2504949.html
