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HPD Heat Pump Distilation And Shpd Split Heat Pump Disillation Device
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HPD热泵精馏与SHPD分割式热泵精馏装置 HPD Heat Pump Distilation And
Shpd Split Heat Pump Disillation Device |
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热泵 Heat pump |
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高效高压比螺杆压缩机，实现塔顶热能品位的提升，从而实现塔顶二次能源应用于塔底的循环利用。螺杆压缩机的压比和效率均大于离心式和罗茨式，是最适用于热泵精馏装置的机械式热泵 The high effciency high pressure ratio screw compressor realizes the improvement of the thermal energy grade at the top of the tower,so as to realize the recycling of the secondary energy at the top of the tower. The pressure ratio and efficiency of screw compressor are greater than that of centrifugal and Roots type,and it is the most suitable mechanical heat pump for heat pump distillation device. |
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热泵精馏技术的应用背景和简介 Application background and introduction of heat pump |
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在天然产物、发酵、医药、化工等行业，广泛存在高能耗的精馏操作，往往仅精馏的动力运 行成本就占据公司总动力成本的一半以上，存在巨大的节能空间和生产成本优化空间。在此背景下，研究机构开发出了多种针对精馏过程节能的技术，比如通过增加中间再沸器或冷凝 器，通过隔板塔技术等，但这些技术的节能效果有限，不能从根本上实现能源的循环利用。 能够实现能源二次利用和循环利用的技术就是多效精馏和热泵精馏技术，随着热泵技术的发展，热泵精馏技术的优势被凸显出来，成为目前用于精馏工况节能的较好的技术。 热泵精馏技术是将塔顶产物二次蒸汽的热量经 过压缩后用于塔底再沸器的技术，从工艺上来 说主要分为单塔热泵精馏和分割式热泵精馏装置。 单塔热泵精馏是指采用压缩机压缩塔顶蒸汽， 提高二次热能品位后直接加热塔底再沸器，实现能源的循环利用，这种工艺对于塔顶、塔底温差较小的工况有很好的适用性。 对于温差较大的工况，由于对压缩机增压要求比较高，压缩机用电量增加，总体节能率下 降，因此需要采用分割式热泵精馏装置，即选择合适的分割点，增加中间再沸器，塔顶压缩 后的二次热能用于中间再沸器，由于中间再沸器的温度远低于塔底温度，因此压缩机的增压 要求不高，另外由于中间再沸器的设置，塔底再沸器的热负荷大幅降低，只需要少量的生蒸汽即可满足热量需求，因此对于塔顶和塔底温 差较大的工况，分割式热泵精馏装置相对于单 塔热泵精馏有更高的节能效率。
In natural products,fermentation,medicine,chemical and other industries,there is a wide range of high- energy distillation operations,often only the power operation cost of rectification accounts for more than half of the tota power cost of the company,there is a huge energy saving space and production cost optimization space.in this context,research institutions have developed a variety of energy- saving technologies for the rectification process,such as by increasing the intermediate reboiler or condenser,through the separator tower technology, but these technologies have limited energy-saving effects,can not fundamentally achieve enegy recycling.The technology that can realize the secondary utilization and recycling of energy is multi- effect distillation and heat pump distillation technology.With the development of heat pump technology,the advantages of heat pump distillation technology have been highlighted,and it has become the best technology for energy saving under rectification conditions at present.Heat pump disillation technology is the heat of the secondary steam product at the top of the tower after compression for the bottom of the tower reboiler technologyfrom the technical point of view,it s mainly divided into single tower heat pump distillation and split heat pump distillation device.
Single-tower heat pump rectification refers to the use of compressors to compress the steam at the top of the tower,improve the secondary heat energy grade, and directly heat the bottom of the tower reboiler to achieve energy recycling.This process has good applicability to the working conditions of small temperature difference between the top and the bottom of the tower. For the conditions with large temperature difference, due to the relatively high requirements for compressor pressurization,the compressor power consumption increases,and the overall energy saving rate decreases,it is necessary to use a split heat pump rectification device,that is,to select the appropriate split pointincrease the intermediate reboiler,and the secondary heat energy after compression at the top of the tower is used for the intermediate reboiler,because the temperature of the intermediate reboiler is much lower than that at the bottom of the tower.Therefore,the pressurization requirements of the compressor are not high,in addition,due to the setting of the intermediate reboiler,the heat load of the tower bottom reboiler is greatly reduced,and only a small amount of raw steam is needed to meet the heat demandso for the working conditions with a large temperature difference between the top and the bottom of the tower,the split heat pump disillation device has higher energy saving efficiency than the single tower heat pump distillation. |
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技术优势 Technological advantage |
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节能率高，热泵精馏技术理论节能率可到75%,实际节能率也可以达到65%。 系统简洁，易于理解，便于操作。 适用性广，可操作参数少，系统参数可自平衡，适应不同工况。 High energy saving rate,the theoretical energy saving rate of heat pump rectification technology can reach 75%,and the actual energy saving rate can also reach 65%. The systemis simple,easy to understand and easy to operate. Wide applicability few operable parameters,system parameters can be self-balanced to adapt to different working conditions. |
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