Application case of vibrating screen in pharmaceutical industry

Because the pharmaceutical industry is related to people's life and health, the application of vibrating screen in the pharmaceutical industry is very strict, and there are strict standards In the pharmaceutical process, it is necessary to screen the raw materials after comminution Most of the particles are not uniform after comminution, and most of them need to be screened by equipment The particle size of the raw material is not uniform after grinding, and it needs to be screened before mixing In the drug production process, the screening tool is the standard drug screen The special vibrating screen in the pharmaceutical industry plays a role in the screening of pharmaceutical powder to reach the qualified particle size It is a special industry for pharmaceutical production All the relevant provisions on the vibrating screen of pharmaceutical powder are also in the Pharmacopoeia Therefore, stainless steel screen machine can be selected, such as stainless steel rotary vibrating screen, linear vibrating screen, etc In the pharmaceutical industry, it is necessary to screen medicines, including raw materials, particles in the production process, and finished products First of all, in the aspect of raw material selection, most of the machines used by manufacturers are not fine enough to screen raw materials, so that there are many impurities in the production process, or they can't select good raw materials, and they can't grasp the purity of drug raw materials very well, so they need to use rotary vibrating screen for rough selection Second, in the production process, due to various factors such as mechanical vibration, granular semi-finished products are easy to be broken into small pieces, or powder, affecting the output and quality For the liquid, it is more necessary to use the rotary vibrating screen to filter and screen, filter out the impurities, so as to carry out the package after Zui Third, when the products are made into finished products, it is necessary to select the drugs and select the better ones for packaging, which also needs screening Note: the vibrating screening equipment used in the pharmaceutical industry must be made of stainless steel 304 or even 316 Impurities are not allowed to contaminate the parts contacting the materials Therefore, rubber accessories must also meet the food grade health standard (silica gel) After using the rotary vibrating screen, special chemicals should be used for cleaning to keep the screening equipment clean, And the screening equipment required by the pharmaceutical industry must pass GMP production standards The use of vibrating screen in pharmaceutical industry has very strict requirements It must meet the GMP production standards of pharmaceutical industry, which is related to whether the screened drugs will be polluted As for the selection of the screen matching the vibrating screen, the diameter of the screen is generally 0.4-0.5m, and each screen can be made of one to five layers of screen The screen of the vibrating screen is generally made of woven screen, which can be divided into 201 ordinary stainless steel, 304 stainless steel, 304L Stainless steel, 316 stainless steel and 316L stainless steel according to its materials It is widely used because of its acid, alkali and corrosion resistance The screen application of these materials is explained below 201 stainless steel is suitable for general materials The screen made of 304 stainless steel is better than that made of 201 The 304L screen is mainly used in the food industry It is more widely used in the food industry It has the characteristics of high acid resistance, alkali resistance and corrosion resistance The 316 and 316L stainless steel screens are suitable for the pharmaceutical industry, which can effectively reduce the pollution of metal materials on drugs, and have the characteristics of high corrosion resistance and acid-base resistance Therefore, when selecting the rotary vibrating screen, the user must specify the industry to be applied or the materials to be screened, or the screen to be used for the rotary vibrating screen The calculation formula of mesh size or mesh number (this formula is calculated by individuals according to the law of mesh, which is only convenient for use in the absence of data or specific site Because the mesh diameter may be different, the calculated data is a summary, which is only for your reference): the mesh size of mesh should be calculated in inverse proportion, For example, if it is known that the aperture of 100 mesh screen is 0.15mm, the aperture X of 200 mesh screen should be calculated according to this formula: X ≈ 100 mesh x 0.15mm ÷ 200 mesh x ≈ 0.075mm the aperture of the screening machine used in the pharmaceutical industry is made by referring to the Chinese Pharmacopoeia There are nine sieve numbers in the Chinese Pharmacopoeia The inner diameter of sieve Zui of No.1 sieve is large, The inner diameter Zui of No 9 sieve is small Comparison of mesh and mesh size mesh mesh mesh size / mm mesh mesh size / mm mesh mesh size / mm mesh mesh size / mm82.5320.56800.182000.071102350.5900.162400.063121.6400.451000.1542600.056161.25450.41100.143000.05181500.3551200.1253200.045200.9550.3151300.1123600.04240.8600.281500.1260.7700.2241600.09280.63750.21900.08 mesh and mesh size matching According to the table, μ m, μ m, μ m, μ m, μ m, μ m, μ m2.5792591981324951101504253336580101655135417115124500253.555113121397403501170.588625204459914116847.529518083800155396216991602462007412010633272655220250612507279424701982705362502823622758910016532547125001