Six principles for the selection of air flow pulverizer

There are many kinds of air crushers How to choose a good feed crusher correctly? Here are the selection principles 1 When selecting the type, the first consideration should be given to what kind of raw materials are crushed by the crusher purchased The hammer crusher with top feed can be selected for crushing grain feed; the claw crusher can be selected for crushing bran, grain and wheat feed; the hammer crusher with tangential feed can be selected if it is required to have good universality, such as mainly crushing grain, taking into account both cake, grain and straw; the shell crusher without screen can be selected for crushing mineral feed such as shell; if it is used as premixed feed For the pre-treatment of raw materials, if the particle size of the product is required to be very fine and can be adjusted according to the needs, the special non screen crusher shall be selected 2 The specification and nameplate of the general crusher contain the rated production capacity of the crusher (kg / h) However, several points should be noted: (1) the rated production capacity is generally based on the status of crushed corn, with the water content as the safe water storage (about 13%) and φ 1.2mm sieve plate As corn is commonly used grain feed and the sieve plate with diameter of 1.2mm is commonly used Zui small sieve, the production capacity is small at this time, which takes into account the more common and more difficult status in production (2) The production capacity of the selected crusher is slightly larger than the actual production capacity, so as to avoid the continuous production and supply of feed being affected when the production capacity of the crusher is reduced due to the wear of hammer pieces, air leakage of air duct, etc 3 The energy consumption of the crusher is very large, so energy saving cannot be ignored when purchasing According to the standards of relevant departments, the output of each kilowatt hour of hammer crusher shall not be less than 48kg when crushing the sieve with φ 1.2mm mesh for corn At present, the kilowatt hour output of domestic hammer crusher has greatly exceeded the above-mentioned regulations, reaching 70? 75 kg / kilowatt hour 4 Matching power of pulverizer The instructions and nameplate of the machine contain the power kilowatts of the motor matched with the crusher It often indicates not a fixed number but a certain range For example, the power of 9FQ? 20 crusher is 7.5? 11kw; the power of 9FQ? 60 crusher is 30? 40kW There are two reasons for this One is that there is a big difference in the power required for different varieties of raw materials For example, under the same working conditions, the power required for crushing sorghum is twice as high as that required for crushing corn Second, when using different mesh, the load of the crusher has a great impact It is believed that the motor capacity of 9FQ? 60 crusher should be 40kW when using φ 1.2mm sieve, and 30kW motor can be used when replacing φ 2mm sieve, and 22KW motor can be used for φ 3mm sieve Otherwise, it will cause a certain degree of waste The following empirical formula can be used to calculate the hammer crusher 1V = 6.4 × 10.5q (kw), where 1V - matching power (kw) Q - rated production rate of crusher (T / h) 6.4 × 10.5 is the coefficient, small value is taken for coarse grinding and large value is taken for fine grinding 5 The discharging mode of crusher shall be considered There are three ways to output crushed products through discharging device: self weight blanking, negative pressure suction conveying and mechanical conveying In order to simplify the structure, the self weight cutting method is often used for small single machine Most of the medium-sized pulverizers are equipped with negative pressure suction device, which has the advantages of absorbing the moisture of the finished products, reducing the humidity in the finished products is conducive to storage, improving the pulverizing efficiency by 10? 15%, and reducing the dust level in the pulverizing chamber The mechanism conveyor is mostly used for the crusher with a table output of more than 2.5t 6 Dust and noise of pulverizer The dust and noise in feed processing mainly come from the crusher The two environmental sanitation indexes should be fully considered in selection If the pulverizer with high noise and dust has to be selected, the noise reduction and dust prevention measures shall be taken to improve the working environment and the health of the operators.