Omit brewing craft beer, beer equipment adds wort and boils it. After boiling, the thermosetting substances are separated from the wort as soon as possible by physical methods, so on get a clear wort. The wort is then cooled to the fermentation temperature required by the process. While cooling, wort ventilation should be carried out to provide enough oxygen for yeast reproduction. Separation methods include cooling plate method, sedimentation tank method and Whirlpool method.
The purpose of the wort after boiling
After the wort is boiled, the hot coagulation and cold coagulation in the wort should be separated as soon as possible to get clear wheat. Then cool the wort to the fermentation temperature required by the process (the lower fermentation should be cooled to 6-9 ℃, and the upper fermentation should be 12-18℃ ). While cooling, the wort is ventilated to provide enough oxygen for the yeast to multiply.
Main tasks of wort post-processing
Generation of thermal coagulation
Factors affecting the amount of thermal coagulation:
- The amount of precipitation of thermal coagulum is related to the number of nitrogenous substances in the wort and the solubility of the malt.
- Once the thermal coagulation suspended in the fermentation broth is adsorbed by the yeast cells, it will affect the normal fermentation and sedimentation of the yeast cells. Also, the thermal coagulum in the wort can also lead to increased beer color, rough taste, long after-bitter, poor foam stability, and taste stability.
Whirlpool tank
The structure and technical requirements of the Whirlpool tank.
- whirlpool tank is a flat-bottomed closed cylindrical vessel with a 2% slope at the outlet. The ratio of the height of the wort level to the diameter of the tank is 1:2-3. Modern Whirlpool tanks choose a ratio of 1:3.
- New Whirlpool tanks generally have an insulating layer to prevent the wort from cooling. To better collect the hot solids, a conical hot solids collection cup is installed in the center of the bottom of the Whirlpool tank.
- The wort enters the tank in the tangential direction, and there are two inlets, one at the bottom of the tank to avoid oxygen absorption. The other inlet is at 1/3 of the height from the bottom of the tank.
Selection of wort in the swirling direction
- The wort enters the trough along the tangential direction of the trough wall to form a rotary motion. After the feeding of the belt, the rotating wort is allowed to decelerate , resulting in a whirling effect.
- The solids in the wort are subject to the combined force of gravity and centripetal force and move towards the center of the trough, following the whirling effect of natural deceleration and rotation.
"Coriolis" effect
Important technological factors in post-processing of wort
Heating time
Hot wort delivery
Pumping of hot wort
Cooling and oxygenation of the wort
After the wort is boiled and poured into the rotary sedimentation tank, after separating the hop lees and thermal coagulation, the following treatments should be carried out :
- Rapid cooling to bring the wort temperature to the need for yeast inoculation
- The wort is cooled and ventilated, and yeast can synthesize substances such as sterols and unsaturated fatty acids necessary for its reproduction only after absorbing enough oxygen.
- Precipitation and separation of hot and cold coagulants in the wort to ensure normal fermentation and desired beer quality.
The basic requirements of wort cooling for cooling equipment.
- The parts where wort and cooling water flow through should be easy to clean.
- It is better to seal the well to prevent the leakage of cooling water and wort.
- There should be enough cooling area, the cooling time should be short, and the amount of precipitation of cold solids should be large.
Heat recovery rate of the plate heat exchanger: The heat recovery rate of the plate heat exchanger should be > 95%, and the temperature difference between the front and rear cooling areas should be small. Raise the hot water temperature as much as possible.
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China brewing equipment manufacturer and suppliers Micet Craft has cooperated with breweries in many countries around the world to provide them with brewing equipment. We provide customers with turnkey brewery solutions, which include designing, manufacturing and installing customized breweries. The Micet Craft team has decades of experience in the manufacturing of brewing equipment, we not
Best brewhouse equipment manufacturer from china Brewing good beer requires brewhouse equipment. Whether you are brewing beer for home, business or brewery, Micet Craft can provide a turnkey solution according to the daily output you need. We have brewhouse equipment with 2 vessels, 3 vessels and 4 vessels, the unique design allows you to do decoction
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