Pneumatic conveying roots blower is used to transport semi water gas and produce nitrogen fertilizer (synthetic nitrogen) and urea in fertilizer industry. As the conveying medium is semi water gas, the gas leakage requirements are strict to avoid personal accidents.
According to the characteristics of chemical fertilizer industry, packing seal is designed in machinery industry, which has good sealing effect and meets the needs of chemical fertilizer industry.
Roots blower is an important mechanical equipment for calcination and material transportation in the production line of neutral kiln and rotary kiln in cement industry.
1. Air supply for shaft kiln calcination
Using shaft kiln to calcine cement has the characteristics of low heat consumption, low investment and high efficiency. Roots blower is widely used in the air supply of calcined cement because of its hard exhaust characteristics and pressure self adaptability. For vertical cement kiln
Due to the change of the height of the material layer in the kiln, the required air pressure often changes. The higher the material layer in the kiln, the higher the air pressure required and the greater the air volume required. The hard exhaust characteristics of the pneumatic conveying roots blower can better meet this requirement.
2. Homogenization of raw material transportation in rotary kiln
Rotary kiln is used to produce cement, roots blower for powder conveying and roots blower for material conveying are used for raw material conveying homogenization, and the production is floated to achieve homogenization of raw material. For this kind of fan, the pressure rise is higher, generally: pressure rise ≥ 58.8kpa; flow rate: 5 ~ 160m3 / min.
The standard for judging the speed of Roots blower depends on the size and model of the fan. Small fans can rotate at a higher speed, mainly due to the accuracy of the dynamic balance instrument during the production and manufacture of the fan. The higher the accuracy is, the greater the speed can be. However, at present, the accuracy of the dynamic balance instrument is limited in the world. The speed of all large fans should be lower, and that of small fans can be higher.
When selecting fan, it is better to choose medium and low speed to avoid high speed, so as to prolong the service life of fan. Generally speaking, the speed of fans below 1 ton should be less than 2000 rpm, those with more than 1 ton should be controlled at 1000-2000 rpm, and those with caliber above 200 should be under 1000 rpm.
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