合理利用废气余热降低合成氨能耗的技术总结

本文介绍了在“两煤变一煤”的技改中主要技术措施及所取得的经济效益和环境效益。     

余热水源热泵系统在粘胶纤维厂的应用

在粘胶纤维生产中会产生大量废热,由于废热温度低,用传统的热量回收手段难以回收利用,而采用热泵工艺技术可以将废热的低温热能转化为可利用的高温热能,回用于生产和生活,有效回收能源。     

充分利用余热降低PTA装置综合能耗

介绍回收可利用的能源来降低装置的综合能耗的情况。余热回收系统改造降低产品综合能耗32kgEO;D1-1501乏气回收系统改造降低产品综合能耗22kgEO,同时降低污水处理负担,改善装置环境,提高装置技术水平。     

二类热泵在联合站余热回收的设计

二类吸收式热泵是利用工质吸收循环实现热泵功能的一种装置,它采用余热源直接驱动,而不是依靠电能、机械能等其它高级能源。它将部分废热能量转移到高温位加以利用,所以吸收式热泵是余热回收利用的有效手段。本文对单级二类吸收式热泵在余热水为50℃时进行了热力计算,设计出了余热量较少时的单级吸收式热泵,建立了热泵系统各部分质量守恒、能量守恒方程,计算了机组的性能系数COP,验证了机组的热平衡,并对机组进行了性能及经济性分析。     

实现CO_2再生气余热回收降低合成氨能耗

联碱中CO_2再生气含有大量的余热。本文介绍了如何回收这些余热,使联碱的总能耗降低,并取得了很好的经济效益和社会效益。     

采用先进工艺技术降低聚乙烯醇能耗

分析了聚乙烯醇产品能耗高的原因，介绍了回收DT-602A、B合并改造和DT-603、DT-001塔节能技术改造的情况，对DT-603、DT-601塔系统做了节能核算并对改造后的生产效果进行了对比分析。     

改造凝结水回收系统降低能耗

本文对原有装置进行了改造,方案合理,既回收了热能,又回收了凝结水,取得了较好的经济效益和社会效益。     

粮食干燥装置节能减排技术的研究与实践

针对东北地区粮食干燥机系统能耗高、污染重的现状并根据对现有的塔式粮食干燥装置的考察分析,进行了节能减排方面的技术改造。采取了尾部干燥段和冷却段废气回收、烟气余热利用、设备保温处理和更换高效换热器等措施,使换热器进风口的平均风温比大气温度提高了30℃以上,排烟温度降低了30℃以上,节煤10％以上,废气中的皮屑和粉尘回收率可达80％以上。该技术改造在多个示范库点进行了实施,收到了明显的节能减排效果。     

余热资源的回收利用是节约能源的重要途径

叙述了企业余热资源回收的意义和可回收的余热资源的途径。对四平联化电石炉炉气回收利用情况进行了计算。同时还介绍了该厂回收电石炉炉气后所取得的经济效益和社会效益。     

褐煤干燥水分回收利用及其研究进展

褐煤干燥提质过程中的水资源化回收利用工艺技术可以提高煤阶并回收宝贵的水资源,降低干燥提质单元能耗。本文从介绍褐煤中水的存在形态出发,围绕烟气直接干燥、蒸汽流化床干燥、微波干燥、机械热压脱水干燥等工艺综述了近年来干燥水回收利用的研究现状和最新进展,讨论分析了褐煤干燥与水回收利用工艺的选择原则。在回收褐煤中丰富的水资源时,除了单纯考虑回收褐煤中的水资源,还应权衡褐煤干燥工艺、干燥温度和干燥介质、干燥水蒸气的余热利用方式以及干燥工艺上下游间的衔接等因素。基于目前褐煤资源的主要用途,将干燥尾气采用换热技术回收低温余热和干燥冷凝水直接净化处理后的二次回用技术将是以后的重要研究和应用方向。     

污泥热泵干燥速率及能耗的实验研究

利用小型热泵干燥试验台，对污泥干燥过程含水率、空气参数（温度、相对湿度）及热泵参数（制冷工质参数、排水量、能耗等）的变化进行了试验测试，并着重对干燥速率、能量回收率及影响因素进行了分析。试验显示，依靠外热源预热后，污泥干燥过程仅依靠热泵回收的排气余热供热，干燥箱内平均温度可达63℃，最高迭71℃。干燥箱内温度的高低取决于受制冷工况影响的热泵供风温度。污泥干燥速率随空气温度升高和相对湿度的降低而增大，湿基含水率从42．6％到18．74％的平均干燥速率为0．123％／（m·min）。热泵干燥回收排气余热的节能效果显著，并随热泵排水量的增加而增大。平均能量回收率为39．1％，最大值为48．9％和最小值为23．6％，分别发生在热泵排水量最大和最小的阶段。     

Efficient Energy Recovery with Wood Drying Heat Pumps

This article presents a 13-m³ wood dryer coupled with a 5.6-kW (compressor power input) heat pump. Drying tests with hardwood species such as yellow birch and hard maple were completed in order to determine the system's energy performance. Supplementary heating to compensate for the dryer heat losses was supplied using electrical coils or steam exchangers. The heat pump running profiles and dehumidification performance in terms of volumes removed and water extraction rates, coefficients of performance, and specific moisture extraction rates were determined for two all-electrical and two hybrid drying tests. The hardwood drying curves, share of the final moisture content, and final quality of the dried wood stacks, as well as total drying energy consumption and costs, were determined for each drying run. Finally, the total energy consumption of the drying cycles using a heat pump was compared with that of a conventional drying cycle using natural gas as a single energy source.     

Energy,Thermal, and Economic Analysis of Air Heat Pumps for Hot Water

Operation tests of an air heat pump used for domestic hot water (DHW) heating were performed. The influence of the supply air temperature in the evaporator cycle and the variable heat load of the condenser on the heating power of the heat pump and the coefficient of performance (COP) was evaluated and discussed. In order to ensure conditions for efficient compressor operation, it is advisable to gradate the heat load of the heat pump using a circulating pump with smooth capacity regulation. The economic analysis demonstrates that the usage of air heat pumps for DHW in comparison with installations equipped with solar collectors provides no measurable economic benefits.     

蒸汽加热系统节能及余热利用

目前化工行业面临激烈的国内外市场竞争 ,节能降耗是提高企业经济效益的重要措施。本文介绍了以喷射技术为核心的一系列蒸汽加热系统应用的节能新技术和设备 ,以及在国内首次应用的蒸汽升压、喷射节能降压等新技术 ,节能率达 30 %以上     

Investigation on Drying Performance and Energy Savings of the Batch-Type Heat Pump Dryer

Simulation of the heat pump cycle and the drying process has been carried out to obtain the design parameters of the dryer. The analysis indicates that a specific moisture extraction rate (SMER) greater than 3.4 kg/kWh can be obtained. A box-type heat pump dryer has been developed and investigated for the performance of drying of shredded radish. Heat pump drying took 1.0–1.5 times longer than hot air drying. However, the heat pump dryer showed considerable improvement in energy savings. The SMER of the heat pump dryer was about three times higher than that of the hot air dryer.     

气流干燥过程的数学模拟及研究进展

气流干燥器是化工生产中广泛应用的干燥装置.由于气流干燥过程的复杂性,影响过程模拟的因素较多.介绍了气流干燥模拟的基本计算过程与方法,并展望了未来的研究方向及发展.     

Energy Consumption in Industrial Drying of Radiata Pine

This article reports the results of an exploratory study designed to reduce heat and electricity consumption in industrial drying of radiata pine. The experiments were performed with slight modifications of the standard drying schedules used by the sawmill to dry radiata pine in 100-m³ industrial kilns. The heat and electricity consumption were determined with data collected during the drying runs and calculations based on mathematical models. The results showed that depending on the case, heat and power consumption were respectively reduced by up to 14 and 35%.     

浅谈干燥设备系统的节能减排

解释节能减排方面的GDP能耗、能源效率、合同能源管理以及CDM等常用名词术语,介绍了换热器冷凝水回收,热风炉高效燃烧和热泵等节能措施与途径。     

Effects of Component Arrangement and Ambient and Drying Conditions on the Performance of Heat Pump Dryers

Performances of five heat pump dryer (HPD) configurations were studied by computer simulation. The component arrangement covers the fully open, the partially open, and the fully closed systems with external condenser or external cooler. The HPD performance was investigated for high and low drying rate and within the ambient temperature range of 20°C to 40°C. The best operating mode of the HPD depends on both drying rate and ambient condition. For the case of tropical climate and high drying rate, the partially open system is the optimum operating mode in general, except at some particular conditions where the fully open and fully closed systems are recommended. However, the operation for the low drying rate is more complicated, as the optimum configuration is sensitive to the change of ambient temperature.     

低温海水源热泵的技术方案分析

针对冬季海水温度较低,海水源热泵系统中海水换热器易出现海水侧结冰的问题,提出三个可用于低温海水的技术方案。介绍了三个方案的流程和特点,并对各个方案的初投资及运行维护进行了对比分析,对低温海水源热泵系统的构建提供了较好的参考。