How to choose a malt milling for beer brewing brewery? ZXF

How to choose a malt milling for beer brewing brewery?

The barley malt can be dissolved well after being crushed, and the crushing quality plays an important role in the biochemical changes of the substances in the saccharification process, the composition of the wort, the filtration of the wort and the utilization of raw materials.

Bitter substances, silicates and proteins, etc., after being strongly eluted, these substances will have an adverse effect on the color and taste of beer. Since cellulose is insoluble in water and hardly affected by enzymes, it has little effect on wort.

The skin is tough and mechanically resistant to the rollers of the pulverizer, making it difficult to grind, especially when the malt moisture is high. The skin should not be crushed too finely, because the skin can form a natural filter layer. If the malt is crushed too finely, it will reduce the filtration performance of the wort and even cause serious filtration difficulties. In addition, the crushed malt is too fine, the volume of the material becomes smaller, and the malt powder is tightly packed together, which will inevitably increase the outflow of wort and the difficulty of washing the spent grains.

Choosing a suitable shredder is very important.

There are mainly two types of grinders often used in craft beer equipment, one is a disc grinder, and the other is a pair of roller grinders. The two types of grinders are described in detail below:

1. Grinding Disc Crusher

The grinding disc pulverizer utilizes the relative movement between the internal movable toothed disk and the fixed toothed disk, so that the material is crushed by the impact, friction, shearing, and mutual impact of the toothed disk. It has the advantages of simple structure and convenient operation, but the shortcomings are also very prominent: large noise; large amount of dust; craft beer equipment is commonly used for equipment under 1000 liters, and the grinding disc grinder is also fully sufficient.

If the malt is excessively moist, it is easy to cause the chainring to lock up. At this time, the cleaning work is very troublesome. It is usually necessary to disassemble the shell and remove the movable chainring to clean up all the gaps.

2. the roller crusher

The roller mill adopts smooth or toothed iron rollers, which rotate at the same and different speeds. The malt is crushed by the rollers under the action of squeezing and friction, and the endosperm is rolled out of the bark. . The crushing process can be one time or multiple times. According to the number of rollers, roller crushers can be divided into: counter-roll, four-roll, five-roll, six-roll crushers, etc. Among them, the counter-roll crusher is commonly used in craft beer equipment. Because of its convenient adjustment, easy control of pulverization thickness, high production efficiency, low noise, easy dust control and many other advantages, the price is more expensive than that of the disc grinder.

There are two types of roller mills: carbon steel shell and stainless steel shell. We suggest to choose the stainless steel shell of the roller mill as far as possible, because the working environment and working medium of the mill will inevitably come into contact with water, Dust, etc., are easy to rust. In order to ensure the quality of craft beer, it is the best solution to use a stainless steel shell of the roller mill. 

In addition, in the selection process, based on the author's years of work experience, there are two points that require additional

Note:

The pulverizer has a lot of vibration, so composite gears must be used.

The roller shredders are all belt driven. After a period of use, the belt may become loose. At this time, the belt needs to be tensioned. Therefore, the motor cover must be easily disassembled.