1. Use of stainless steel tank: The steel sealed container for storing liquid or gas is a steel stainless steel tank. Steel stainless steel tanks are the most important and important basic equipment in petroleum,
chemical, grain and oil, food, fire protection, transportation, metallurgy, national defense and other industries. People's economic life is always inseparable from large and small stainless steel tanks. The important role of steel stainless steel tanks in the development of the national economy is unparalleled. Steel stainless steel tanks are equipment for storing various liquid (or gas) materials and products. For many enterprises, normal production is inseparable from stainless steel tanks, especially the storage of national strategic materials, and stainless steel tanks of various capacities and types. . Most of the oil storage equipment in my country is mainly made of above-ground stainless steel tanks, and most of them are metal structures. Second, the classification of stainless steel tanks: Because of the different storage media, stainless steel tanks also have a variety of methods. Classification by location: can be divided into above-ground stainless steel tanks, underground stainless steel tanks, semi-underground stainless steel tanks, offshore stainless steel tanks, submarine stainless steel tanks, etc. According to the classification of oil products: it can be divided into crude oil stainless steel tanks, fuel stainless steel tanks, smooth oil tanks, edible oil tanks, fire water tanks, etc. Classification by use: It can be divided into production oil tanks, oil storage tanks, etc. Classification by method: can be divided into vertical stainless steel tanks, horizontal stainless steel tanks, etc. Classification by structure: can be divided into fixed roof stainless steel tanks, floating roof stainless steel tanks, spherical stainless steel tanks, etc. Classified by size: large stainless steel tanks above 100m3 are mostly vertical stainless steel tanks; below 100m3 are small stainless steel tanks, mostly horizontal stainless steel tanks. The auxiliary air filter attached to the stainless steel fermentation tank should generally be steam sterilized and air-dried before sterilizing the medium in the stainless steel tank. The sterilization status of the stainless steel tank is shown in the figure below. When the solid tank is sterilized, the sewage in the conveying pipeline is firstly drained and washed, and then the manufactured medium is pumped into the fermentation tank (seed tank or material tank), and the agitator is started at the same time for sterilization. Before sterilization, open each exhaust valve, introduce steam into the jacket or coil to preheat, and gradually close the exhaust valve when the temperature of the stainless steel fermentation tank rises to 80~90℃. Then, the steam is directly introduced into the tank from the air inlet, exhaust port and sampling port (if there is a flushing tank, the steam is also introduced together), so that the temperature in the tank rises to 118~120℃, and the pressure in the tank is maintained at 0.09~0.1 Mpa (gauge pressure), persist for about 30min. The air inlet of each channel should be clear to avoid short circuit and backflow, and the liquid in the tank should be violently turned; the exhaust of each channel should also be clear, but the exhaust volume should not be too large to save gas. In the heat preservation stage, all pipes and pipes whose inlets are lower than the liquid level of the medium should be fed with steam; those whose openings are higher than the liquid level should be vented. No matter how the pipeline connected to the tank is prepared, the principle of 'no entry and exit' should be followed in practice. This guarantees complete sterilization with no dead spots. After the heat preservation is over, close the exhaust valve and the intake valve in sequence. After the pressure in the stainless steel fermentation tank is lower than the air pressure, sterile air is introduced into the tank, and the cooling water is cooled by the jacket or coil to heat the culture medium. Lower the temperature to the desired temperature for the next fermentation and cultivation. Before introducing sterile air, it should be noted that the tank pressure must be lower than the filter pressure, otherwise the material will flow back into the filter, resulting in serious consequences! During sterilization, the total pressure of the steam pipeline shall not be lower than 0.3~0.35Mpa, and the operating pressure shall not be lower than 0.2Mpa. Paste stirring pot, stainless steel storage tank, emulsifier manufacturer, Jinzong Machinery
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