![]() It enters the tank from under the wort liquid level of the filter tank and refluxes for 5-10min until the wort is clear. Pre spray and turbid wort return:There are some particles passing through the Johnson screen sieve plate between the sieve plate and the bottom of the tank, these particles and the wort just filtered form turbid wort.For this reason, temperature drop must be avoided during filtration. ![]() The higher the temperature of saccharification termination, the looser the wheat trough, and the faster the filtration. The first wort is gathered on the top of the lees layer, which is necessary because the wort tank is required as the natural filtering medium for wort filtration, which is called filtration standing. Static: After the mash is pumped in, a grain layer of 25cm high will be formed when the unit load is 150kg / m, and when the unit load is 200kg / m, the thickness of the waste layer is about 34cm. Mash pump in:The mash should be pumped into the filtration tank as quickly as possible and evenly distributed, otherwise, it will lead to uneven dissolution of the leachables and decrease the leaching rate.Therefore, hot water should be pressed in from the bottom of the Johnson screen plate, and the sieve plate should be preheated at the same time. hot water pressure in:In order to filter quickly, the sieve plate must be clean and free of dirt and air bubbles.We use Johnson screen ( wedge wire screen) instead of perforated plate, with larger flow, longer service life, not easy to block, easy to clean. The filtration tank is not only an old but also a widely used wort filtration equipment, the filtration tank of brewery is a cylindrical container, in which there is a perforated sieve plate, which supports the wheat tank, and the wort is filtered. Johnson screen is widely used in Breweries, wedge wire false bottom screen (lauter tun screen & mash tun screen), spent grains dewatering screen, rotary drum screen and so on. Craft of brewed beer – Filtration process of filter tank
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