A vertical roller mill bypass classification drying raw meal preparation system and process

Abstract

The invention discloses a vertical roller mill bypass graded drying raw meal preparation system, the discharge port of the raw material hoist is connected to the feed port of the vertical roller mill, and the discharge port of the vertical roller mill is connected to the mill The feed port of the tail lifter, the discharge port of the grinding tail lifter is connected to the feed port of the drying equipment, the discharge port of the drying equipment is connected to the feed port of the dry material lifter, and the discharge port of the dry material lifter Connect the inlet of the V-type powder separator of the primary classification equipment, the air outlet of the V-type powder separator is connected to the air inlet of the vortex powder separator of the final classification equipment, and the air outlet of the vortex powder separator is connected to the air inlet of the cyclone collector. The air outlet of the cyclone collector is connected to the air inlet of the circulating centrifugal fan, the air outlet of the circulating centrifugal fan is connected to the air inlet of the vertical dryer, and the air outlet of the vertical dryer is connected to a V-shaped selection The air inlet of the powder machine; the invention makes full use of the system to facilitate reasonable adjustment and control of the process parameters of the system, so as to achieve the purpose of increasing production and reducing consumption of the system.

Description

technical field [0001] The invention relates to a vertical roller mill bypass graded drying raw material preparation system and a production process thereof, which belong to the field of building material manufacturing. Background technique [0002] New dry process cement enterprises in the building materials industry generally use vertical roller mills to prepare raw meal, coal powder, slag powder and cement. The vertical roller mill prepares raw meal, and its grinding unit power consumption is about 20kwh / t on average. This system saves about 25% of electricity compared with the traditional ball mill for raw meal preparation. The current raw material preparation production process of the vertical roller mill of the new dry process cement enterprise, the raw material grinding, material transportation, raw material drying and finished product classification are all completed in the vertical roller mill, which has the advantages of simple process and small footprint However,...

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Problems solved by technology

The current raw material preparation production process of the vertical roller mill of the new dry process cement enterprise, the raw material grinding, material transportation, raw material drying and finished product classification are all completed in the vertical roller mill, which has the advantages of simple process and small footprint However, due to the fact that the material classification, moisture drying and material transportation of the existing vertical mill preparation raw meal process are all realized by the high wind speed and large air volume of the vertical mill system, this leads to large system resistance and low material drying and classification efficiency. There are many unfavorable factors such as low air volume, large system air volume, and the technical parameters of each equipment unit function are difficult to control due to the limitations of the host structure.

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