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Keli Shi丨The pneumatic conveying method of some special materials in the food industry

Keli Shi丨The pneumatic conveying method of some special materials in the food industry

  • Categories:News Center
  • Time of issue:2022-05-06 14:04

(Summary description)At present, in the food industry, some raw materials of powder and granules are transported by pneumatic conveying in the production and transportation, which can greatly improve the production efficiency. However, in the food industry, there are some special materials that need special attention in the process of pneumatic conveying.   一、易磨损、破碎的物料;要求完整度较高的物料 气力输送是通过气流的能量来实现物料的输送,因此在管道内的输送过程中,物料粒子之间不可避免会相互碰撞,由于物料与管壁以及物料与物料之间的碰撞和摩擦,易磨损的物料不可避免的会破碎。除此之外,物料也会受摩擦、剪切、压缩或者拉伸等作用力,外界环境还会造成热应力、电作用力等,这些影响因素都会引起物料的破碎。   而很多的产品对物料外形的完整度有一定的需求,例如一些颗粒、片状的食品原料,特别是粮食行业,黑豆、绿豆等谷物类原料对外形的完整度要求较高,因此必须控制原料在输送过程中的破碎率。   在气力输送系统中,如何保证这类物料的输送完整性?这需要经过经验丰富的方案设计人员,对物料的特性和输送参数进行一定的测试,选择合适的料气比与气流速度,这才能有效减低输送过程对物料的影响。   二、 易粘粘、粘附的物料;吸湿性较高的物料 在食品行业中,其实易粘附物料并不少见,例如淀粉、面粉等烘焙原料,此外,一些吸湿性较强的物料,如细砂糖等,也会在湿度较高的环境下粘结、成团。   易粘附的物料在气力输送系统中上料、运输、储存、包装等工艺环节,由于物料本身的特性,容易在管道内粘附,不但会降低生产效率,更为而严重还会导致管道堵塞,影响系统的正常运行。在某些环境下,由于物料粘附,粘结成团的物料在粘附处还可能会发生霉变、结垢,直接影响产品的品质。   因此,在食品原料进行气力输送设计时,我们应充分考虑易粘附物料的特性,不仅需要在工艺上进行特殊的处理,还必须对物料本身要有充分的了解,从物料的物理特性、化学特性上考虑。通常情况下,我们可以考虑降低含水率、降低气体温度提高风量、在易粘附的弯头处采取预防措施等,通过有效的预防措施防止物料粘附,保障系统的正常运行。

Keli Shi丨The pneumatic conveying method of some special materials in the food industry

(Summary description)At present, in the food industry, some raw materials of powder and granules are transported by pneumatic conveying in the production and transportation, which can greatly improve the production efficiency. However, in the food industry, there are some special materials that need special attention in the process of pneumatic conveying.



 

一、易磨损、破碎的物料;要求完整度较高的物料

气力输送是通过气流的能量来实现物料的输送,因此在管道内的输送过程中,物料粒子之间不可避免会相互碰撞,由于物料与管壁以及物料与物料之间的碰撞和摩擦,易磨损的物料不可避免的会破碎。除此之外,物料也会受摩擦、剪切、压缩或者拉伸等作用力,外界环境还会造成热应力、电作用力等,这些影响因素都会引起物料的破碎。

 

而很多的产品对物料外形的完整度有一定的需求,例如一些颗粒、片状的食品原料,特别是粮食行业,黑豆、绿豆等谷物类原料对外形的完整度要求较高,因此必须控制原料在输送过程中的破碎率。

 

在气力输送系统中,如何保证这类物料的输送完整性?这需要经过经验丰富的方案设计人员,对物料的特性和输送参数进行一定的测试,选择合适的料气比与气流速度,这才能有效减低输送过程对物料的影响。



 

二、 易粘粘、粘附的物料;吸湿性较高的物料

在食品行业中,其实易粘附物料并不少见,例如淀粉、面粉等烘焙原料,此外,一些吸湿性较强的物料,如细砂糖等,也会在湿度较高的环境下粘结、成团。

 

易粘附的物料在气力输送系统中上料、运输、储存、包装等工艺环节,由于物料本身的特性,容易在管道内粘附,不但会降低生产效率,更为而严重还会导致管道堵塞,影响系统的正常运行。在某些环境下,由于物料粘附,粘结成团的物料在粘附处还可能会发生霉变、结垢,直接影响产品的品质。

 

因此,在食品原料进行气力输送设计时,我们应充分考虑易粘附物料的特性,不仅需要在工艺上进行特殊的处理,还必须对物料本身要有充分的了解,从物料的物理特性、化学特性上考虑。通常情况下,我们可以考虑降低含水率、降低气体温度提高风量、在易粘附的弯头处采取预防措施等,通过有效的预防措施防止物料粘附,保障系统的正常运行。

  • Categories:News Center
  • Time of issue:2022-05-06 14:04
  • Views:
Information

At present, in the food industry, some raw materials of powder and granules are transported by pneumatic conveying in the production and transportation, which can greatly improve the production efficiency. However, in the food industry, there are some special materials that need special attention in the process of pneumatic conveying.

科里时丨食品行业一些特殊物料的气力输送方式

 

1. Materials that are easily worn and broken; materials that require high integrity

Pneumatic conveying realizes the conveying of materials through the energy of air flow. Therefore, during the conveying process in the pipeline, the material particles will inevitably collide with each other. Due to the collision and friction between the material and the pipe wall and between the material and the material, it is easy to wear The material will inevitably be broken. In addition, the material will also be subjected to friction, shearing, compression or tension and other forces, and the external environment will also cause thermal stress, electrical force, etc. These influencing factors will cause the material to be broken.

However, many products have certain requirements for the integrity of the shape of the material. For example, some granular and flake food raw materials, especially in the food industry, grain materials such as black beans and mung beans have high requirements for the integrity of the shape, so it is necessary to control the raw materials. The crushing rate during the conveying process.

In the pneumatic conveying system, how to ensure the conveying integrity of such materials? This requires experienced scheme designers to conduct certain tests on the characteristics of the material and conveying parameters, and select the appropriate material-to-air ratio and airflow speed, which can effectively reduce the impact of the conveying process on the material.

科里时丨食品行业一些特殊物料的气力输送方式

 

2. Materials that are easy to stick and adhere; materials with high hygroscopicity

In the food industry, it is not uncommon for materials that are easy to adhere, such as starch, flour and other baking materials. In addition, some materials with strong hygroscopicity, such as fine sugar, will also bond and form in a high humidity environment. group.

Materials that are easy to stick to in the process of feeding, transportation, storage, packaging and other process links in the pneumatic conveying system, due to the characteristics of the materials themselves, are easy to stick in the pipeline, which will not only reduce production efficiency, but also lead to pipeline blockage. , affecting the normal operation of the system. In some environments, due to the adhesion of materials, the materials that are bonded into agglomerates may also be mildewed and scaled at the adhesion, which directly affects the quality of the product.

Therefore, in the design of pneumatic conveying of food raw materials, we should fully consider the characteristics of materials that are easy to adhere Consider the characteristics. Under normal circumstances, we can consider reducing the moisture content, reducing the gas temperature and increasing the air volume, taking preventive measures at the elbows that are easy to adhere, etc., through effective preventive measures to prevent material adhesion and ensure the normal operation of the system.

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