What are the configurations of the mashing equipment?
1、Configuration of mashing container
For the mashing part of micro beer production line, two or three mashing containers are usually equipped. The mashing containers generally have multiple functions, while the mashing workshop of large brewery is equipped with "three pots and one tank" (mashing pot, gelatinization pot, boiling pot and filter tank), which is more perfect.
In order to improve the daily mashing times, the mashing workshop is generally equipped with: temporary storage tank (used to temporarily store the first wort when the boiling pot is occupied) and rotary sedimentation tank.
The size of the mashing container varies with the use. According to the amount of 100kg malt, the volume of each container is: mashing pot 6 ~ 8HL; wort boiling pot 8 ~ 9hl; gelatinization pot 4 ~ 5hl; filter tank 6 ~ 8HL; wort temporary storage tank 3~
4hL。 The size of the saccharifying container depends on the amount of wort produced.
2、Mashing container
The mashing process usually requires two containers, namely gelatinization pot and mashing pot, with similar type and structure (see Fig. 3-58). The mashing pot is mainly used for the decomposition of malt starch and protein, where the saccharified mash is mixed with the gelatinized auxiliary mash to maintain the mash at a certain temperature for starch mashing; the gelatinization pot is mainly used for heating the boiled rice and other auxiliary materials as well as some malt mash to gelatinize and liquefy the starch.
The mashing pot has the functions of heating and stirring. The design of agitator size is very important. Its rotating speed must adapt to the diameter of the pot body, and the linear speed must not exceed 3m / s, otherwise it will produce shear force on the mash and change the contents of the mash (see Section 2 of Chapter 2 of this chapter).
Like the mashing pot, the gelatinization pot also has the functions of heating and stirring. Now, the heating method of the gelatinization pot has been greatly improved. In the past, steam jacket was often used for heating. Because of its large surface area, if you forget to open the air valve at the end of boiling, it is easy to form a vacuum and suck up the bottom of the pot. In addition, the heat transfer effect of steam jacket is also poor. Now, the semicircle pipe is often welded at the bottom and side wall of the boiler. Because the semicircle pipe is relatively stable, the vacuum shrinkage phenomenon will not appear after the steam valve is closed, so it is not connected with the air at the end of boiling, so as to avoid the lack of steam. At the same time, considering the cost and heat transfer effect, carbon steel plate is often used instead of stainless steel and copper to make the heating part of the pot body, and thin stainless steel is used for the inner layer. In this way, the heat transfer efficiency can be increased by more than 20%.
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