CN109479950A - 一种余甘子冷冻干燥处理方法 - Google Patents
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Abstract
本发明涉及一种余甘子冷冻干燥处理方法,包括如下步骤:1)原料分拣、验收;2)清洗消毒;3)切片;4)沥干;5)铺盘;6)热风烘干;7)真空冷却;8)速冻;9)真空冻干;10)真空包装。在保证余甘子品质和营养成分的同时,通过对余甘子进行适度的热风干燥,然后再进行冷冻干燥,最大程度地保持余甘子的营养成分和原有形状,而大大缩短了冻干处理周期,提高了冻干处理效率,同时使处理后余甘子的质地不再坚硬而变得蔬松,极易破碎和食用。
Description
技术领域
本发明属于余甘子生产、干燥技术领域,具体涉及一种余甘子冷冻干燥处理方法。
背景技术
余甘子,是大戟科、叶下珠属木本植物。又名余甘树、油甘子、橄榄、滇橄榄、油柑、望果、牛甘子、久如拉(藏语)、麻项邦(傣语)等名。余甘子在304年晋代就始载于《南方草木状》,原译名称庵摩勒,为常用清热解毒药。高达23米,胸径50厘米;树皮浅褐色;枝条具纵细条纹,被黄褐色短柔毛。
其果实富含丰富的丙种维生素,供食用,可生津止渴,润肺化痰,治咳嗽、喉痛,解河豚鱼中毒等。初食味酸涩,良久乃甘,故名“余甘子”。树根和叶供药用,能解热清毒,治皮炎、湿疹、风湿痛等。 叶晒干供枕芯用料。种子含油量16% ,供制肥皂。树皮、叶、幼果可提制栲胶。木材棕红褐色,坚硬,结构细致,有弹性,耐水湿,供农具和家具用材,又为优良的薪炭柴。
其主要产于江西、福建、台湾、广东、海南、广西、四川、贵州和云南等省区,生于海拔200-2300米山地疏林、灌丛、荒地或山沟向阳处。喜温暖干热气候。
为了有效运输、保存余甘子,新鲜采摘的余甘子经常需要进行干燥,而常用的余甘子干燥方法为热风干燥法,但采用热风干燥后余甘子干燥程度不佳,不能长期保存,且影响余甘子内的品相和营养成分。
冷冻干燥具有保持蛋白质等不会失去活性的有点,但其处理周期长,成本比其他干燥要高。
亟待发明一种即能保证余甘子新鲜时的色、味和营养成分营养成分,生产周期又较短的余甘子冻干技术方案来解决上述技术问题。
发明内容
针对上述提到的问题,本发明提供一种结合热风干燥和快速冻干的技术方案,其即能保证余甘子外观形态和营养成分,又能较大缩短生产周期。
具体技术方案是:一种余甘子冷冻干燥处理方法,包括如下步骤:
1)原料分拣、验收:对进场的余甘子原料进行感观验收,不能有腐烂、发霉的余甘子,原料中不能含有其他杂质;农残速测,农药残留和重金属含量必须在国家允许的范围内;
2)清洗消毒:清洗掉余甘子中的泥沙、去除异物以及枯黄叶,无可见泥土及明显异物,清洗后的余甘子放入余氯浓度为500 mg/L,pH值:5.5~6.5的水中,浸入消毒8~10min,消毒后的余甘子用洁净的水冲洗5~8min;
3)切碎:给料均匀的将步骤2)中的余甘子切碎,然后用流动水冲洗1遍;
4)沥干:静置于自然环境中沥水10~15min;
5)铺盘:将步骤4)中沥干后的余甘子均匀的平铺在网状托盘上,平铺高度5~8cm;
6)热风烘干:将步骤5)盛有余甘子的托盘放入热风干箱中,风速0.15~0.20m/s,热风干箱的温度在30~35℃,烘干1~1.5h。
7)真空冷却:风干后的余甘子在真空环境下,余甘子冷却到6~8℃;
8)速冻:将冷却后的余甘子放入冷冻室中在温度为-60~-75℃,速冻2~3h;
9)真空冻干:
a.升华干燥:将速冻后的余甘子放入真空冷冻干燥设备中,抽真空至80~90Pa,冻干温度在-80~-85℃,时间为3~4h;
b.解吸干燥:然后将真空冷冻干燥设备抽真空至50~60Pa,冻干温度在-60~-70℃,时间为3~5h;
10)真空包装。
进一步,所述步骤5)铺盘中的托盘网孔直径为0.2~0.3mm。
试验表明,热风温度、热风速度是影响余甘子热风干燥的主要因素。热风温度越高,热风速度越大,余甘子干燥速度越快,干燥效率越高;但干品的复水特性随温度的升高和风速的增大反而降低。
将清洗后的余甘子首先通过0.15~0.20m/s、热度在30~35℃的热风干燥,能将热量快速传动给余甘子,使的余甘子面层的水分快速蒸发,同时余甘子随着热量的传递,水分逐步扩散至表面,适当的温度、风速和时间保证了余甘子的感官指标没有产生大的变化,对余甘子营养成分、蛋白质等影响较小,其还未失去活性。
然后将经过热风部分干燥处理后的余甘子降温,保证余甘子表皮不会发皱变硬,速冻放入真空冷冻干燥设备中进行真空冻干处理。
本发明的有益效果:在保证余甘子品质和营养成分的同时,通过对余甘子进行适度的热风干燥,然后再进行冷冻干燥,最大程度地保持余甘子的营养成分和原有形状,而大大缩短了冻干处理周期,提高了冻干处理效率,同时使处理后余甘子的质地不再坚硬而变得蔬松,极易破碎和食用。
具体实施方式
为了使本发明所解决的技术问题、技术方案更加清楚明白,以下公开了多个实施例,对本发明进一步详细说明。应当理解,此处所描述的具体实施例仅仅用于解释本发明,并不用于限定本发明。
实施例1:
1)原料分拣、验收:对进场的余甘子原料进行感观验收,不能有腐烂、发霉的余甘子,原料中不能含有其他杂质;农残速测,农药残留和重金属含量必须在国家允许的范围内;
2)清洗消毒:清洗掉余甘子中的泥沙、去除异物以及枯黄叶,无可见泥土及明显异物,清洗后的余甘子放入余氯浓度为500 mg/L,pH值:5.5的水中,浸入消毒8min,消毒后的余甘子用洁净的水冲洗5min;
3)切碎:给料均匀的将步骤2)中的余甘子切碎,然后用流动水冲洗1遍;
4)沥干:静置于自然环境中沥水10min;
5)铺盘:将步骤4)中沥干后的余甘子均匀的平铺在网状托盘上,托盘网孔直径为0.2mm,平铺高度5cm;
6)热风烘干:将步骤5)盛有余甘子的托盘放入热风干箱中,风速0.15m/s,热风干箱的温度在30℃,烘干1h。
7)真空冷却:风干后的余甘子在真空环境下,余甘子冷却到6℃;
8)速冻:将冷却后的余甘子放入冷冻室中在温度为-60℃,速冻2h;
9)真空冻干:
a.升华干燥:将速冻后的余甘子放入真空冷冻干燥设备中,抽真空至80Pa,冻干温度在-80℃,时间为3h;
b.解吸干燥:然后将真空冷冻干燥设备抽真空至50Pa,冻干温度在-60℃,时间为3h;
10)真空包装。
实施例2:
1)原料分拣、验收:对进场的余甘子原料进行感观验收,不能有腐烂、发霉的余甘子,原料中不能含有其他杂质;农残速测,农药残留和重金属含量必须在国家允许的范围内;
2)清洗消毒:清洗掉余甘子中的泥沙、去除异物以及枯黄叶,无可见泥土及明显异物,清洗后的余甘子放入余氯浓度为500 mg/L,pH值:6的水中,浸入消毒9min,消毒后的余甘子用洁净的水冲洗7min;
3)切碎:给料均匀的将步骤2)中的余甘子切碎,然后用流动水冲洗1遍;
4)沥干:静置于自然环境中沥水12min;
5)铺盘:将步骤4)中沥干后的余甘子均匀的平铺在网状托盘上,托盘网孔直径为0.25mm,平铺高度7cm;
6)热风烘干:将步骤5)盛有余甘子的托盘放入热风干箱中,风速0.18m/s,热风干箱的温度在32℃,烘干1.2h。
7)真空冷却:风干后的余甘子在真空环境下,余甘子冷却到7℃;
8)速冻:将冷却后的余甘子放入冷冻室中在温度为-65℃,速冻2.5h;
9)真空冻干:
a.升华干燥:将速冻后的余甘子放入真空冷冻干燥设备中,抽真空至80~90Pa,冻干温度在-82℃,时间为3.5h;
b.解吸干燥:然后将真空冷冻干燥设备抽真空至55Pa,冻干温度在-65℃,时间为4h;
10)真空包装。
实施例三:
1)原料分拣、验收:对进场的余甘子原料进行感观验收,不能有腐烂、发霉的余甘子,原料中不能含有其他杂质;农残速测,农药残留和重金属含量必须在国家允许的范围内;
2)清洗消毒:清洗掉余甘子中的泥沙、去除异物以及枯黄叶,无可见泥土及明显异物,清洗后的余甘子放入余氯浓度为500 mg/L,pH值6.5的水中,浸入消毒10min,消毒后的余甘子用洁净的水冲洗8min;
3)切碎:给料均匀的将步骤2)中的余甘子切碎,然后用流动水冲洗1遍;
4)沥干:静置于自然环境中沥水15min;
5)铺盘:将步骤4)中沥干后的余甘子均匀的平铺在网状托盘上,托盘网孔直径为0.3mm,平铺高度8cm;
6)热风烘干:将步骤5)盛有余甘子的托盘放入热风干箱中,风速0.20m/s,热风干箱的温度在35℃,烘干1.5h。
7)真空冷却:风干后的余甘子在真空环境下,余甘子冷却到8℃;
8)速冻:将冷却后的余甘子放入冷冻室中在温度为-75℃,速冻3h;
9)真空冻干:
a.升华干燥:将速冻后的余甘子放入真空冷冻干燥设备中,抽真空至90Pa,冻干温度在-85℃,时间为4h;
b.解吸干燥:然后将真空冷冻干燥设备抽真空至60Pa,冻干温度在-70℃,时间为5h;
10)真空包装。
以上通过具体的和优选的实施例详细的描述了本发明,但本领域技术人员应该明白,本发明并不局限于以上所述实施例,凡在本发明的精神和原则之内,所作的任何修改、等同替换等,均应包含在本发明的保护范围之内。
Claims (2)
1.一种余甘子冷冻干燥处理方法,其特征在于:包括如下步骤:
1)原料分拣、验收:对进场的余甘子原料进行感观验收,不能有腐烂、发霉的余甘子,原料中不能含有其他杂质;农残速测,农药残留和重金属含量必须在国家允许的范围内;
2)清洗消毒:清洗掉余甘子中的泥沙、去除异物以及枯黄叶,无可见泥土及明显异物,清洗后的余甘子放入余氯浓度为500 mg/L,pH值:5.5~6.5的水中,浸入消毒8~10min,消毒后的余甘子用洁净的水冲洗5~8min;
3)切碎:给料均匀的将步骤2)中的余甘子切碎,然后用流动水冲洗1遍;
4)沥干:静置于自然环境中沥水10~15min;
5)铺盘:将步骤4)中沥干后的余甘子均匀的平铺在网状托盘上,平铺高度5~8cm;
6)热风烘干:将步骤5)盛有余甘子的托盘放入热风干箱中,风速0.15~0.20m/s,热风干箱的温度在30~35℃,烘干1~1.5h;
7)真空冷却:风干后的余甘子在真空环境下,余甘子冷却到6~8℃;
8)速冻:将冷却后的余甘子放入冷冻室中在温度为-60~-75℃,速冻2~3h;
9)真空冻干:
a.升华干燥:将速冻后的余甘子放入真空冷冻干燥设备中,抽真空至80~90Pa,冻干温度在-80~-85℃,时间为3~4h;
b.解吸干燥:然后将真空冷冻干燥设备抽真空至50~60Pa,冻干温度在-60~-70℃,时间为3~5h;
10)真空包装。
2.根据权利要求1所述的一种余甘子冷冻干燥处理方法,其特征在于:所述步骤5)铺盘中的托盘网孔直径为0.2~0.3mm。
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CN112869072A (zh) * | 2021-02-24 | 2021-06-01 | 上海应用技术大学 | 一种冻干片状贡柑果干及其制备方法 |
CN117959352A (zh) * | 2024-03-29 | 2024-05-03 | 天津科技大学 | 一种温湿共激发协同提高余甘子中没食子酸含量的方法和应用 |
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CN105211780A (zh) * | 2015-10-13 | 2016-01-06 | 杨明彰 | 胡萝卜干的加工方法 |
CN107912736A (zh) * | 2017-11-28 | 2018-04-17 | 藤县友强淮山种植专业合作社 | 一种淮山脱水方法 |
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CN102274270A (zh) * | 2011-08-15 | 2011-12-14 | 应群芳 | 一种中药余甘子的加工工艺 |
CN105211780A (zh) * | 2015-10-13 | 2016-01-06 | 杨明彰 | 胡萝卜干的加工方法 |
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CN112869072A (zh) * | 2021-02-24 | 2021-06-01 | 上海应用技术大学 | 一种冻干片状贡柑果干及其制备方法 |
CN117959352A (zh) * | 2024-03-29 | 2024-05-03 | 天津科技大学 | 一种温湿共激发协同提高余甘子中没食子酸含量的方法和应用 |
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