Product Description

The influence of crushing quality on beer quality

Mash process Iodine test time Wort filtration mash workshop Yield rate Filterability of fermented beer (β-glucan content) Beer color, taste and flavor stability Wort preparation is the most important link in the beer production process.

In order to ensure the smooth progress of beer fermentation, it is an important prerequisite and basis for fermentation to convert the non-water-soluble components in malt into water-soluble substances through the mash process, that is, to turn them into fermentable sugars that can be metabolized by yeast.

The purpose of broken malt

Separate the husk from the surface of the grain so that its endosperm can be effectively decomposed by enzymes.

Reduce the extent to which the endosperm becomes powdery (that is, the particles are too small) to increase their effective surface area for water absorption.

Effectively keep the wheat husk intact, so that the wort can be filtered smoothly after malt mashing.

Reduce the amount of fine powder, because these fine powder will become paste after mashing, which will affect the filtering effect.

Obtain the highest yield from the raw materials.

Requirements and points of crushing process

The loss rate from malt to the crusher is low; the total loss rate of crushing is 0.3 to 3%;

The quality of the crushed materials must be kept stable during the crushing, otherwise, it will have a fluctuating impact on the beer quality in the subsequent process;

Reduce the cost of the crushing process as much as possible, and pay attention to improving the crushing quality, so as to ensure that the subsequent production process, from mash to beer filtration, can have a lower production cost.

Zunhuang company provides complete raw material processing system for small and medium breweries. Including raw material lifting, silo, vibrating screen, dust removal, metering warehouse, crusher, etc. Dry pulverization is a traditional pulverization method, which is widely used in domestic small and medium-sized breweries.

Including: selection machine, vacuum cleaner, hoist, shredder, silo and accessories.

Dry malt pulverization mostly uses a pair of roller mills, including two-roller, four-roller, five-roller, and six-roller models.

Roller of a crusher

The roller of the crusher is made of cold, hard cast iron by centrifugal casting process, and the surface of the roller has extremely high hardness.

The diameter of the roller is about 250mm, and the diameter should not be too small, otherwise the grain holding angle is too small and the crushing ability will decrease.

The holding angle refers to the angle formed by holding the wheat grains here.

Rotation speed of crushing roller

The rotating speed of the crushing roller is different, the rotating speed of the driving wheel is high, and the rotating speed of the driven wheel is low.

The speed ratio of the drawing roller is about 2.5:1; the speed ratio of the flat roller is about 1.25:1.

The rotation speed of the roller is:

Pre-grinding roller: 400～420r/min;

Wheat leather roll: 400r/min;

Coarse roller: 380～440r/min;

The length of the roller is usually 0.8~1m; especially small crusher is 0.4m; extra large crusher can reach 1.5m.

Roller mill

Equipped with a pair of rollers of the same size, one fixed and the other adjustable. The two rollers rotate in opposite directions. The maximum diameter of the roller is 250mm.

The feed rate per centimeter of roll length is 5-20kg/h; maldissolved malt should also reach the lowest quality standard. The speed of the grinder is low, 160～180r/min

Working principle of four-roll mill

1-Distribution roller 2-Feeding adjustment 3-Pre-grinding roller 4-Wheat husk roller 5-Vibrating screen 6-Eccentric drive device 7-Wheat husk with coarse grains 8-Pre-milled pulverized material 9-Fine powder

Structural characteristics of five-roll mill

The first and second stages of pulverization are combined together, and the second roller is a common roller, which can be pre-grinded and can also be used to crush wheat husk.

The structure of the original five-roll mill is characterized by a guide particle system, that is, a drawing plate parallel to the rollers. The drawing board sends the malt into the pre-grinding roller, so as not to damage the bark.

1-Distribution roller 2-Pre-grinding roller 3-Pre-grinding and wheat husk roller 4-Wheat husk roller 5-Coarse grain roller 6-Upper vibrating screen group 7-Lower vibrating screen group 8-Wheat husk with coarse grain 9- Coarse grain 10-fine powder

Important technical performance of six-roll mill

Feeding adjustment or frequency conversion according to the height of the material surface

The digital adjusting roller distance system has an accuracy of 1/100mm.

Terminal security begins. •The efficiency of the sieve is improved and the operation is quiet.

The maintenance-free screen is easy to replace.

One motor is shared, and the gears are man-made materials.

Adopt charging technology.

Explosion-proof: the shell can withstand pressure of 0.7 bar, and withstand negative pressure of 0.1 bar (suction pipe).

Roller length: 1,000～1,500mm.

Work efficiency: 80kg/cm/h coarse powder.

Screen load: 18kg/dm2, ordinary 6-roll mill is 30-40kg/dm2.

W1 Pre-grinding Roll W2 Grain Roll W3 Coarse Grain Roll 1-Malt Into 2-Feed Roll 5-Conveying Plate 6-Friction Brush 10-Crush (13+24)-Coarse 15-Fine Powder 23-Sampler

Wet crushing process

The upper part of the wet mill has a malt silo with a cone-shaped outlet. Soak in the barn.

The most important part of the wet pulverizer is the pulverizing roller with a roller spacing of only 0.45mm. The distribution roller is installed before the pulverizing roller. The pulverized wheat pulp is collected by augers and pumped out by a thick slurry pump. The spray and cleaning system can be used to soak malt or clean the entire equipment.

Detail Image

Schematic Diagram