Active lime calcining system composed of vertical preheater, rotary kiln and cooler.

1) Vertical preheater: Vertical preheater composed of preheater, storage warehouse, material feeding pipe, hydraulic handspike device. Preheater has polygons and round, which utilizing sub-depot and partition device which heat limestone gradually avoiding too quick warming-up causing implosion to crease a large number powder, disintegrate rate of limestone entering kiln could reach 30%-40%, average temperature of gas discharged could be 230??260? for decreasing system heat consumption.

2) Rotary Kiln: Rotary Kiln composed of shell, supporting device, variable speed transmission device, thrust roller device, sealed device of kiln end & kiln head and cover of kiln head. Kiln body put aslant with the angle of 3.5% from horizontal level. It is equipped with two sets of supporting device, its roller bearings is water-cooled dipper lubricating sliding bearing with spherical surface W automatically aligning. And it is equipped with hydraulic thrust roller near to bull gear. Utilizes kiln body drove by variable frequency speed-adjustable motor, meanwhile equip with auxiliary transmission driving kiln body. In kiln head and kiln end takes use spring type sealed device. Utilizing kiln body drove by variable frequency speed-adjustable motor together with preheater disintegrating could efficiently control calcining time and temperature which could meet the crude burning or over burning requirements.

Burner takes use coal and gas mixture burning 4 channels burner which is convenient to adjust and easy to operate and the splashing speed of each wind channel could be adjusted during operation to meet the requirements of fire in different condition of kiln, thus it is easy to control the calcinning temperature.