Material cooling system of large rotary kiln

Abstract

The invention relates to a material cooling system of a large rotary kiln. The material cooling system comprises a kiln head material collecting cover, a sealing cover, a double-layer grate, a discharging gate, a cooler, a discharging device and a cooling air pipeline. The material cooling system is arranged at the discharging end of the rotary kiln and used for treating high-temperature materials thrown out in a rotary mode in the kiln, and the processes of material collection, secondary screening out of large material blocks, side discharging type quantitative guiding-out, material split cooling, confluence centralized discharging and the like are sequentially completed from top to bottom. The material cooling system is reasonably connected with a combustion system, a ventilation system and a pulverized coal fuel conveying system of the rotary kiln, and has the advantages of being good in material cooling effect, long in equipment service life, safe and reliable in work, remarkable in sealing effect and the like.

Description

technical field [0001] The invention relates to a matching device for a rotary kiln, in particular to a material cooling system for a large-scale rotary kiln. Background technique [0002] Large-scale active lime rotary kiln is used for roasting active lime or light-burning dolomite for steelmaking and ironmaking. With the development of active lime rotary kiln to large-scale and serialization, its supporting material cooling system is also constantly improving and innovating. [0003] The previous material cooling system has the following problems: 1) Uneven cooling and easy inclusion of red materials; 2) After the oversized material from the rotary kiln falls, it damages the internal components of the silo, reduces the life of the equipment, or blocks the feeding channel, resulting in production shutdown; 3) The blocking door of the device for intercepting bulk materials is directly connected to an external electric or pneumatic driving rod, and the blocking door can be c...

AI Technical Summary

Problems solved by technology

[0003] The previous material cooling system has the following problems: 1) Uneven cooling, easy to mix red material; 2) The oversized material coming out of the rotary kiln will damage the internal parts of the bin after falling, reducing the life of the equipment, or blocking the feeding channel, resulting in production stoppage; 3) The blocking door of the intercepting bulk material device is directly connected to the driving rod driven by external electric power or pneumatic force, and the closing or opening of the blocking door is realized by pushing and pulling the driving rod

Therefore, the driving rod must pass through the outer wall of the device, extend into the device and connect with the blocking door, and the opening at the outer wall prevents the device from being completely closed

In addition, the blocking door is affected by external dynamic conditions. When the electric or pneumatic drive system is disconnected due to a fault, the blocking door will fail to open, so there is a potential safety hazard

In addition, the blocking door is opened or closed manually, and the automation level is low; 4) There is ash leakage problem in the discharge device, and the sealing problem needs to be solved

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