多孔介質(zhì)除濕與再生特性研究
發(fā)布時(shí)間：2019-06-24 09:28
【摘要】：在一些環(huán)境中對(duì)濕度有特定的要求，如制藥類，食品類，電器制作類，輕工類等，對(duì)濕度的要求嚴(yán)格，常常相對(duì)濕度在10%以下，因此，對(duì)除濕空調(diào)領(lǐng)域提出了更高的要求。固體除濕空調(diào)除濕的區(qū)域可以利用低品位熱源，如太陽(yáng)能，工業(yè)廢熱等，節(jié)約了大量能源，無壓縮機(jī)的使用，因此解決了氟利昂對(duì)大氣臭氧層污染的問題。在固體吸附劑中分子篩及活性氧化鋁由于自身的吸附特性對(duì)空氣的深度除濕具有一定的優(yōu)勢(shì)。 通過實(shí)驗(yàn)室以電廠粉煤灰為主要原料，氫氧化鈉為活化劑，通過堿熔融水熱法合成沸石分子篩和以硝酸鋁與碳酸氫銨為主要原料通過溶膠凝膠法合成的活性氧化鋁，，對(duì)兩種材料的孔徑及比表面積進(jìn)行分析，得到制作材料的最佳條件，并對(duì)其熱重分析，設(shè)計(jì)裝置發(fā)揮其最佳的除濕狀態(tài)。建立試驗(yàn)臺(tái)進(jìn)行低溫再生的多孔工質(zhì)空氣除濕實(shí)驗(yàn)系統(tǒng)，該系統(tǒng)由多孔固體除濕再生系統(tǒng)、濕度、溫度、壓力監(jiān)測(cè)系統(tǒng)及其他附屬調(diào)節(jié)設(shè)備組成，試驗(yàn)以特定溫濕的空氣為處理對(duì)象，對(duì)吸附（再生）柱進(jìn)出口及柱內(nèi)測(cè)點(diǎn)進(jìn)行數(shù)據(jù)監(jiān)測(cè)，得到濕度、溫度、壓降工作參數(shù)，分析吸附柱壓降的變化對(duì)吸附除濕的影響情況，同時(shí)分析得到進(jìn)口空氣含濕量、溫度、流量的變化對(duì)其多孔工質(zhì)除濕與再生工作特性的影響。 實(shí)驗(yàn)系統(tǒng)可以對(duì)多孔吸附介質(zhì)物性參數(shù)和系統(tǒng)多工況運(yùn)行調(diào)節(jié)工作特性展開實(shí)驗(yàn)測(cè)試工作，深入研究多孔工質(zhì)除濕及再生過程的工作特性和傳熱傳質(zhì)機(jī)理，將兩種材料分別用于空氣調(diào)節(jié)系統(tǒng)除濕和再生試驗(yàn)，并和目前常用除濕劑4A分子篩比較，在低溫低濕，常溫低濕及常溫高含濕量空氣環(huán)境的除濕性能進(jìn)行分析，同時(shí)對(duì)三種干燥劑進(jìn)行實(shí)驗(yàn)對(duì)比，得到干燥劑對(duì)于深度除濕的情況，分析實(shí)驗(yàn)室制備的活性氧化鋁的除濕性能較好，制備的沸石分子篩在初始階段的除濕速率快，吸附效果好，穩(wěn)定階段由于自身比表面積等受限同活性氧化鋁及4A分子篩的除濕效果有一定的差距。 對(duì)沸石分子篩、活性氧化鋁及4A分子篩進(jìn)行再生性能測(cè)試，用電加熱器對(duì)空氣進(jìn)行加熱對(duì)材料進(jìn)行脫附研究，確定材料的再生溫度范圍，另外在多個(gè)完整的工況下測(cè)得再生溫度下各干燥劑的除濕效率進(jìn)行評(píng)價(jià)。得到在系統(tǒng)中三種材料的最佳再生溫度及此時(shí)系統(tǒng)的效率。同時(shí)在通過熱重分析及再生實(shí)驗(yàn)的測(cè)試，發(fā)現(xiàn)實(shí)驗(yàn)室制備的活性氧化鋁可以采用低溫?zé)嵩醋鲵?qū)動(dòng)力，再生階段空氣進(jìn)口溫度為57.2℃時(shí)活性氧化鋁較其他兩種干燥劑的效率更高。
[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
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU834.9
本文編號(hào)：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
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU834.9
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