CN111336783A - 一种基于余热回收的高温热泵粮食烘干*** - Google Patents
一种基于余热回收的高温热泵粮食烘干*** Download PDFInfo
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Abstract
一种基于余热回收的高温热泵粮食烘干***,属于粮食加工设备技术领域,整个***由送风回路、空气源热泵回路和热水输送回路组成,采用可对排风进行余热回收的空气源热泵,蒸发器吸收来自烘干塔的排风余热和室外新风的热量,烘干塔进风口内的换热器将来自室外的空气加热后送入烘干塔,该基于余热回收的高温热泵能提供的送风温度和风量均能满足烘干塔烘干粮食的需求,烘干塔排出的排风经过过滤装置净化后从出风管排出,利用回风管道送到蒸发器进风口,可以提升蒸发器的进风温度,从而提高空气源热泵的制热量及运行效率。
Description
技术领域
本发明属于粮食加工设备技术领域,涉及一种粮食烘干装置,具体的说是涉及一种基于余热回收的高温热泵粮食烘干***。
背景技术
粮食干燥是粮食产后的重要环节,是粮食安全贮藏的一个极其重要的条件。为了减少田间损失和保证质量,一般要求“适时收获”,但是这时收获的粮食大部分含水率较高,不便贮存。一般的粮食干燥设备通常采用煤炭、油类或木材作为燃烧材料,会产生大量烟雾和废气,对环境及干燥物造成很大的污染,且耗时耗力。利用太阳晒粮食受天气制约,利用烘干塔烘出来的产品虽然达标,但是温度过高使得粮食爆壳导致出米率不高。常规的空气源热泵热风机组需要送风量大,能提供的温度55度以上的热风,不能满足烘干塔烘干所需要小风量,高风温要求。传统烘干塔需要的送风温度需要70度以上。因此,设计出一种新型的粮食烘干***解决上述问题显得尤为重要。
发明内容
本发明的目的是针对上述现有技术中的不足,提出一种基于余热回收的高温热泵粮食烘干***,可提供较小送风量的热风,送风温度高,可替代燃煤热风炉作为烘干塔的热源,节能且高效。
本发明的技术方案:一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述烘干***由送风回路、空气源热泵回路和热水输送回路组成;所述送风回路依次由烘干塔、排风管道、过滤装置、回风管道和新风管道连接组成,所述烘干塔下方设有换热器进风侧,所述烘干塔上方设有烘干塔送风侧,所述烘干塔送风侧与所述排风管道相连接;所述空气源热泵回路依次由蒸发器、气液分离器、压缩机、冷凝器、储液罐、干燥过滤器和膨胀阀连接组成,所述蒸发器顶部设有蒸发器进风口,所述蒸发器底部设有蒸发器出风口,所述蒸发器进风口与所述回风管道相连接;所述热水输送回路依次由冷凝器、热水管道、换热器、保温水箱、循环水泵连接组成。
所述新风管道上设有风阀。
所述冷凝器至换热器的热水管道上设有控制阀。
所述过滤室为负压反吹风袋式除尘装置。
所述保温水箱与冷凝器串联连接,制取的高温热水经热水管道进入换热器进行换热后将来自室外的空气加热后送入烘干塔。
本发明的有益效果为:本发明提出的一种基于余热回收的高温热泵粮食烘干***,整个***由送风回路、空气源热泵回路和热水输送回路组成,采用可对排风进行余热回收的空气源热泵,蒸发器吸收来自烘干塔的排风余热和室外新风的热量,烘干塔进风口内的换热器将来自室外的空气加热后送入烘干塔,该基于余热回收的高温热泵能提供的送风温度和风量均能满足烘干塔烘干粮食的需求,烘干塔排出的排风经过过滤装置净化后从出风管排出,利用回风管道送到蒸发器进风口,可以提升蒸发器的进风温度,从而提高空气源热泵的制热量及运行效率。
附图说明
图1 为本发明***结构示意图。
图中:烘干塔1、排风管道2、过滤装置3、回风管道4、室外空气5、新风管道6、风阀7、蒸发器8、蒸发器进风口9、蒸发器出风口10、气液分离器11、压缩机12、冷凝器13、储液罐14、干燥过滤器15、膨胀阀16、热水管道17、控制阀18、换热器进风侧19、烘干塔送风侧20、换热器21、保温水箱22、循环水泵23。
具体实施方式
下面结合附图对本发明作进一步说明:
如图1所示,一种基于余热回收的高温热泵粮食烘干***,烘干***由送风回路、空气源热泵回路和热水输送回路组成;送风回路依次由烘干塔1、排风管道2、过滤装置3、回风管道4和新风管道6连接组成,烘干塔1下方设有换热器进风侧19,烘干塔1上方设有烘干塔送风侧20,烘干塔送风侧20与排风管道2相连接;空气源热泵回路依次由蒸发器8、气液分离器11、压缩机12、冷凝器13、储液罐14、干燥过滤器15和膨胀阀16连接组成,蒸发器8顶部设有蒸发器进风口9,蒸发器8底部设有蒸发器出风口10,蒸发器进风口9与回风管道4相连接;热水输送回路依次由冷凝器13、热水管道17、换热器21、保温水箱22、循环水泵23连接组成。新风管道6上设有风阀7;冷凝器13至换热器21的热水管道17上设有控制阀18;过滤室3为负压反吹风袋式除尘装置;保温水箱22与冷凝器13串联连接,制取的高温热水经热水管道17进入换热器21进行换热后将来自室外的空气加热后送入烘干塔1。
如图1所示,一种基于余热回收的高温热泵粮食烘干***的工作原理如下:烘干塔1排出的排风通过排风管道2经过滤装置3过滤处理后的空气经过回风管道4与从新风管道6进入的室外新风混合,加大空气流量并提升了进风温度,在蒸发器内进行换热。换热后,制冷剂先进入气液分离器,再进入压缩机,通过冷凝器释放热量将来自保温水箱中的水加热,制取的高温热水经热水管道17进入烘干塔进风口内换热器21进行换热,将室外的空气加热后输送到烘干塔用于粮食烘干。
具体工作如下:空气能热泵烘干机开机,吸收低位能,低位能一部分来自于烘干塔排出的排风,另一部分来自室外的空气,吸收的两部分能量加上压缩机的输入功后,传送给来自保温水箱的水,制取的高温热水通过热水管道,将热量送入烘干塔进风口内换热器21,加热来自室外的空气并送入烘干塔。在烘干机工作时,过滤装置开启,把烘干塔内的灰尘以及烘干粮食后的混合空气通过过滤装置进行过滤,过滤后的洁净空气经回风管道4进入蒸发器。
空气源热泵循环***中制冷剂流程按箭头所示,压缩机12→冷凝器13→储液器14→干燥过滤器15→膨胀阀16→蒸发器8→气液分离器11→压缩机12。
高温热水循环***中热水换热流程按箭头所示:冷凝器13→热水管道17→控制阀18→换热器21→保温水箱22→循环水泵23→冷凝器13。此外换热器加热来自室外的空气并送入烘干塔。
过滤装置3采用布袋式除尘,工作原理为:含尘气体从风口进入灰斗后,一部分较粗尘粒和凝聚的尘团,由于惯性作用直接落下,起到预收尘的作用。进入灰斗的气流折转向上涌入箱体,当通过内部装有金属骨架的滤袋时,粉尘被阻留在滤袋的外表面。净化后的气体进入滤袋上部的清洁室汇集到出风管排出。
Claims (5)
1.一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述烘干***由送风回路、空气源热泵回路和热水输送回路组成;所述送风回路依次由烘干塔(1)、排风管道(2)、过滤装置(3)、回风管道(4)和新风管道(6)连接组成,所述烘干塔(1)下方设有换热器进风侧(19),所述烘干塔(1)上方设有烘干塔送风侧(20),所述烘干塔送风侧(20)与所述排风管道(2)相连接;所述空气源热泵回路依次由蒸发器(8)、气液分离器(11)、压缩机(12)、冷凝器(13)、储液罐(14)、干燥过滤器(15)和膨胀阀(16)连接组成,所述蒸发器(8)顶部设有蒸发器进风口(9),所述蒸发器(8)底部设有蒸发器出风口(10),所述蒸发器进风口(9)与所述回风管道(4)相连接;所述热水输送回路依次由冷凝器(13)、热水管道(17)、换热器(21)、保温水箱(22)、循环水泵(23)连接组成。
2.根据权利要求1所述的一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述新风管道(6)上设有风阀(7)。
3.根据权利要求1所述的一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述冷凝器(13)至换热器(21)的热水管道(17)上设有控制阀(18)。
4.根据权利要求1所述的一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述过滤室(3)为负压反吹风袋式除尘装置。
5.根据权利要求1所述的一种基于余热回收的高温热泵粮食烘干***,其特征在于:所述保温水箱(22)与冷凝器(13)串联连接,制取的高温热水经热水管道(17)进入换热器(21)进行换热后将来自室外的空气加热后送入烘干塔(1)。
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