Experimental stainless steel pressure reactorIn terms of technical indicators
1Blade design (this aspect is easy to imitate, The machines from various manufacturers are not significantly different, so we will not elaborate further
The number of blade layers varies depending on the capacity of the hot mix machine2-4The layers are unequal.
The inclination angle of the propeller blade and the lower middle propeller blade should be taken as20°On both sides, the upturned sections of the upper blade should be slightly larger than20°The middle section of the upper blade can be taken as25-30°.
2Blade material, most mixer blades are made of1Cr18Ni9TiThis material has a high cost and is easy to process and polish, but its wear resistance is not satisfactory. To solve the problem of wear, chromium wear-resistant alloy steel has been developed, which mainly consists of:CrTheNiTheNbTheVThe chromium content is:25%Its wear resistance is1Cr18Ni9Tiof4Twice. Due to the high price of chromium metal￥75000/The cost of this type of propeller blade is slightly lower due to its tonnage.

The selection of sealing at the junction of mixing and laboratory reaction vessels is particularly important for sealing effectiveness, safety, and cost savings.

1.Firstly, it is necessary to clarify the basis for sealing selection:*It is the working pressure inside the kettle and the properties of the working materials. Another factor is the operating temperature of the equipment.

2.Secondly, it is necessary to clarify the types of seals used in laboratory reaction vessels: there are two types of seals commonly used in reaction vessels, namely shaft seals,*It is a packing seal, and the second is a mechanical seal, which is further divided into a single machine seal(Single end mechanical seal)Double machine sealing(Double end mechanical seal)The complete set of single machine sealing also includes a water jacket, while dual machine sealing is more complex, except for the water jacket(There must be circulating cooling water)In addition, it also includes supporting brackets, balance tanks, etc.

3.How to choose a suitable seal: Under normal temperature and pressure conditions, where the material is non-volatile and not flammable or explosive, it is necessary to choose a packing seal;Under pressure less than4Under general usage conditions, such as the volatility and flammability of materials, it is necessary to choose a single machine seal;Under work pressure exceeding4kilogram(But it should be less than10kilogram)Under the conditions of high volatility and flammability of materials, dual machine sealing must be selected.

4.Advantages and disadvantages of various laboratory reactor seals: Packing seals are relatively expensive, but only suitable for more common usage conditions and materials;The price of a single machine seal is moderate and can be used universally under most usage conditions;Dual machine sealing is relatively expensive, but it must be used under harsh working conditions