真空压力浸渍蒸煮监控系统

以真空压力浸渍蒸煮设备为对象,采用组态控制技术,开发了以IPC为核心、以通用板卡为接口、以组态软件为平台的真空压力浸渍蒸煮监控系统,实现了整个工艺流程的可视化和工艺过程的控制自动化.     

真空浸渍蒸煮制浆工艺

本文主要对影响真空浸渍的各因素进行了研究及理论分析,通过实验确定了最佳的真空浸渍工艺参数及真空浸渍蒸煮条件,并对两种蒸煮方法的工艺参数及结果进行了比较分析.     

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吉林省辽源市通用机械厂在新华社举行新闻发布会 吉林省辽源市通用机械厂生产的QJ-5型真空压力浸渍设备,主要用于各种果脯的加工,腌菜和泡中药,可强化浸渍,缩短浸渍时间,较传统的浸渍工艺提高工效5-10倍,是目前国内最先进的果脯加工设备,达到国际先进水平。     

食品真空压力浸渍设备及其控制系统的研究设计

本文在分析真空压力浸渍设备的现状和传统浸渍方法的基础上,探讨了真空压力浸渍的机理,设计出了一种用于果蔬食品生产的新型设备,并开发出了该设备的计算机控制系统。     

实验室用可视化真空浸渍装置的设计与研究

真空浸渍技术对果蔬进行处理的最佳工艺条件需进行大量实验才能获得,可视化真空浸渍实验装置的研制即可解决实验室没有专门实验设备的问题.在理论计算的基础上,对实验装置的真空系统、制冷系统、加热系统、自控系统进行设计,包括负荷计算、设备选型等.对样机进行运行实验,达到了预期的目的,效果良好.     

压力浸渍连续蒸煮器生产毛竹化学浆的探讨

国产首套压力浸渍连续蒸煮器于1995年6月在南方某造纸厂安装完毕并试车成功，用毛竹生产出合格的化学浆。本文介绍了毛竹的结构特点和竹片的渗透性能及其制浆工艺流程；着重阐述了压力浸渍连续蒸煮器的设备特征；对毛竹的备料和蒸煮工艺进行了初步的讨论。     

硅溶胶强化复合木材制备工艺研究

以硅溶胶为浸渍处理液,采用真空加压复合工艺制备强化杨树复合木材。集中研究了前真空时间、浸渍压力、浸渍时间、后真空处理时间4个浸渍工艺因子对复合木材性能的影响。结果表明,延长前真空处理时间和提高浸渍压力可以获得较高增重率的复合木材;经真空加压处理后的硅溶胶复合木材抗弯强度和抗弯弹性模量都得到提高,但为了获得较好的弯曲性能,不宜选用较高的浸渍压力和较长的浸渍时间。对于人工林杨树木材,在本研究条件下最适宜的浸渍处理工艺为：前真空时间20min,浸渍压力1.0MPa,浸渍时间30min,后真空时间为20min。     

桉木冷碱浸渍-挤压-硫酸盐法制浆的研究

将冷碱浸渍-挤压作为木片预处理方法,并应用于桉木硫酸盐法制浆的前段。探讨了冷碱浸渍-挤压的最佳工艺条件,研究了蒸煮工艺条件对预处理后料片蒸煮结果的影响,对比了未预处理原料与预处理后料片硫酸盐法蒸煮所得纸浆的强度性能。结果表明,木片经过冷碱浸渍-挤压后,易于蒸煮,从而可减少蒸煮用碱量或降低最高蒸煮温度、缩短保温时间,且蒸煮的均匀性得到改善,筛渣率降低、纸浆强度性能提高。最佳预处理工艺条件为浸渍用碱量2%,浸渍时间2 h,温度25℃,液比1∶5,挤压压缩比3∶1;与未预处理原料硫酸盐法蒸煮(用碱量21%)相比,预处理后料片在总用碱量(浸渍用碱量2%,蒸煮用碱量19%)相同的情况下,成浆卡伯值降低了1.7,细浆得率只降低0.14个百分点,且纸浆强度性能更优,其中,抗张指数、耐破指数、耐折度分别提高了7.0%、5.2%、66%,撕裂指数与未预处理原料硫酸盐法蒸煮所得纸浆相近。     

真空浸渍在果蔬加工与贮藏中的应用进展

真空浸渍技术是一种将传统的浸渍工艺与真空处理相结合的一种简单方便、经济有效的新技术。简要介绍了真空浸渍的原理和影响因素,论述了真空浸渍在采后果蔬贮藏保鲜、果蔬预脱水、营养强化、改善果蔬品质和果蔬腌渍处理五个方面的国内外应用研究进展。     

麻浆球内洗改造

麻类原料纤维长,传统的真空带式洗浆机、压力洗浆机等洗浆设备无法直接用于蒸煮后原料的洗涤,为了降低造纸的生产成本,提高产品质量,我们对麻浆蒸球进行了改造.使蒸煮黑液(药液)得到回收,降低环境污染,减少了洗涤时间,节约大量的水、电能源,具有一定的经济效益.     

Integrated cooking and vacuum cooling of chicken breast cuts in a single vessel

The objective of this work was to develop and evaluate integrated processes of cooking and vacuum cooling of chicken breast cuts in a same vessel aiming at avoiding product manipulation and reducing the processing time. In this context, three integrated processes were compared with respect to weight loss and processing time: (i) vapor cooking followed by vacuum cooling; (ii) water immersion cooking followed by draining the cooking water and vacuum cooling; and (iii) water immersion cooking followed by vacuum cooling with the product immerse in the cooking water. Shorter cooling times were obtained using processes (i) and (ii), where the cooling is performed in non-immersed samples, while smaller weight losses are obtained using process (iii). Consequently, for applications in which weight loss is not an issue, processes (i) and (ii) must be used. Alternatively, process (iii) can be used for obtaining smaller weight losses with a larger cooling time.     

煮茧前真空触蒸工艺初探

对真空状态下触蒸干茧作为煮茧前处理的工艺效果进行了研究。结果表明,在改善茧丝胶着均匀程度和解舒性质,尤其是提高出丝率方面,均优于现行仅用蒸气触蒸的工艺,是一项值得进一步研究开发的煮茧前处理新工艺。     

Effect of pretreatments and vacuum drying on instant dried pork process optimization

Dehydrated meat which can be instantly rehydrated is needed by the industry. This research was aimed to investigate a more economical drying process. Central composite design was applied with three variables: cooking pressure, cooking time, and vacuum drying temperature. The responses were shear force (N), work of shear (N.mm) and % rehydration. The multiple linear regression equation models could predict 91.7, 90.9 and 94.8% of each response, respectively. Cooked pork meat was used for target responses. Its maximum shear force was 43.39±5.42 N, and work of shear was 419.50±64.17 N.mm. Vacuum drying temperature highly affected all responses. Validation of the predicted data was done using two optimum conditions. First condition was cooking pressure of 21.6 lb/in.(2), cooking time of 50 min, and vacuum drying temperature of 95°C. The second condition was cooking pressure of 38.4 lb/in.(2), cooking time of 35 min, and vacuum drying temperature of 100°C. A t-test confirmed that the observed data were not statistically different from the predicted data.     

采用合适的真空渗透煮茧工艺,提高生丝洁净成绩

针对当前在推和机外真空渗透处理后煮茧,存在生丝洁净成绩降低的问题,通过煮茧工艺的对比和分析研究,认为其主要原因是在煮茧工艺方面;并介绍了在机外真空渗透后进行煮茧时,长笼煮茧机各部段一般工艺条件的范围。     

Effectiveness of oxygen barrier oven bags in low temperature cooking on reduction of warmed-over flavor in beef roasts

A 3 × 3 × 2 factorial was utilized to determine if roast size (small, medium, large), cooking method (open-pan, oven bag, vacuum bag), and heating process (fresh, reheated) prevented warmed-over flavor (WOF) in beef clod roasts. Fresh vacuum bag and reheated open-pan roasts had higher cardboardy flavor scores compared with fresh open-pan roast scores. Reheated roasts in oven and vacuum bags did not differ from fresh roasts for cardboardy flavor. Brothy and fat intensity were increased in reheated roasts in oven and vacuum bags compared with fresh roasts in oven and vacuum bags. Differences in TBARS were found in the interaction of heating process and roast size with the fresh and reheated large, and reheated medium roasts having the lowest values. Based on TBARS data, to prevent WOF in reheated beef roasts, a larger size roast in a cooking bag is the most effective method.     

两种不同煮茧工艺路线的对比分析与探讨

我国制丝生产中主要有机内温差渗透煮茧工艺与机外真空渗透煮茧工艺两种不同的煮茧工艺。对不同原料茧分别用两种煮茧工艺进行对比试验显示,各原料茧的万米吊糙次数温差渗透工艺平均7.6次,真空渗透工艺平均3.4次,两者相差1.24倍;解舒光折真空渗透工艺比温差渗透工艺平均小6.6kg。在人工费、原料茧价格趋高的情况下,真空渗透煮茧工艺将为企业带来较大的经济利益。     

茶叶用量和包装方式对卤制牦牛肉贮藏期间理化特性和微生物变化的影响

在卤制牦牛肉的卤煮过程中分别加入0.0%、0.5%或1.0%的绿茶叶,并采用普通包装或真空包装,对卤制牦牛肉在（4±1） ℃、24 d贮藏期内的理化特性和微生物变化进行研究。分别在贮藏期的1、3、6、12、24 d进行采样,测定卤制牦牛肉的蒸煮得率、pH值、色泽、嫩度、感官特性及菌落总数。结果表明：卤制牦牛肉的蒸煮得率仅与卤煮时间有关;在卤煮过程中添加茶叶会明显改变卤制牦牛肉的表面色泽;当卤煮时间为60 min,在卤煮过程中加入0.5%或1.0%茶叶或采用真空包装时,卤制牦牛肉贮藏期间的嫩度会明显提高,卤制牦牛肉的pH值、亮度值、红度值的下降速率和菌落总数的升高速率均得到抑制,总体感官评分升高,且茶叶用量为1.0%并采用真空包装的卤制牦牛肉贮藏期间的综合品质更好。     

Factors influencing the drained weight,texture and other processing characteristics of canned strawberries

The influence of variety, spin cooking and vacuum closing on the quality of canned strawberries was investigated. The characteristics observed were drained weight, pH, acid concentration and texture. A new variety named Majestic had significantly higher drained weight, acid concentration, pH and texture than Phenomenal, the major variety grown in Queensland. It also had a higher drained weight value when grown in one particular area. With the Phenomenal variety, spin cooking, compared with rotary atmospheric cooking, gave a significantly higher drained weight. In addition, the fruit retained its shape and did not collapse to the same extent. For both varieties vacuum closing gave significantly higher drained weight and acid concentration in the drained syrup than steam-flow closing methods.     

Innovative Cooking Techniques for Improving the Overall Quality of a Kailan-Hybrid Broccoli

The microbial, physical, sensory and nutritional quality of boiled (vacuum and conventional), steamed, pressure cooked, sous vide, microwaved (sous vide and conventional), deep-fried (vacuum and conventional) and grilled kailan-hybrid broccoli (Bimi®) after cooking was studied. Sous vide microwaving greatly decreased microbial counts, achieving very low psychrophilic and enterobacteria counts (1.1 and 0.2 log CFU g^?1, respectively). Vacuum boiling and sous vide reduced the stem broccoli firmness by approximately 54–58 %, reaching a pleasant and moderate softening. Sous vide, grilling and steaming induced the lowest stem colour changes. Generally, all cooking treatments showed a good overall sensory quality. The total phenolic content (1,148 mg CAE kg^?1 fw) usually increased after cooking, with microwave and grilled treatments registering the highest increases up to 2-fold. Commonly, the total antioxidant capacity (296.6 mg AAE kg^?1 fw) increased after cooking by sous vide, microwaving and frying treatments registering the highest increments, by approximately 3.6-fold. Generally, the cooking process reduced the initial vitamin C content, with vacuum and conventional boiling showing the lowest and highest losses with 27 and 62 %, respectively, while vacuum deep frying preserved the initial value (1,737 mg kg^?1 fw). As a main conclusion, the studied grilling and vacuum-based cooking treatments resulted in better microbial quality, colour, stem firmness and sensory quality than the remaining ones. This maintained or even improved the total antioxidant content of the new kailan-hybrid broccoli studied.     

Palatability and Storage Characteristics of Precooked Beef Roasts

The palatability and storage characteristics of fresh, frozen and precooked beef chuck roasts prepared using added phosphate-salt and vacuum cooking bags were evaluated. Palatability attributes (tenderness, juiciness, beef flavor intensity, and off-flavor intensity) of precooked roasts prepared in vacuum cooking bags with phosphate-salt were as good or better than freshly cooked roasts. Precooked roasts in vacuum cooking bags had the lowest total bacterial counts after storage for 14 and 28 days. A palatable precooked roast beef product was developed that can be stored for 28 days at 4°C.