Mechanical slag removing method and device in pulverized coal combustion application of lime sleeve kiln

Abstract

The invention discloses a mechanical slag removing method and device in a pulverized coal combustion application of a lime sleeve kiln. The method includes the steps that a cantilever shaft provided with a slag smashing device is driven by a driving device to rotate, flexible chains or wire ropes of the slag smashing device freely stretch through centrifugal force generated by rotating, and caked slag is cut, smashed and removed through the flexible chains or the wire ropes. The device comprises the driving device, the cantilever shaft and the slag smashing device. The driving device comprises a base, a sliding rail, a walking device and a rotating device; the sliding rail is arranged on the base, the walking device is arranged on the sliding rail, the rotating device is arranged on the walking device, the tail end of the cantilever shaft is connected with the rotating device, and the slag smashing device is arranged at the front end of the cantilever shaft; the slag smashing device comprises the flexible chains or the wire ropes. By means of the mechanical slag removing method and device, high-temperature combustion caked slag in the pulverized coal combustion application of the lime sleeve kiln can be removed; compared with traditional manual slag removing, labor cost is reduced, the problems that due to personal factors, slag is not completely cleaned in time are solved, and the removing period is shortened to several minutes from more than 10 hours of manual slag removing.

Description

technical field [0001] The present invention relates to the technical field of lime sleeve kiln, in particular to a mechanical slag removal method and device in the application of coal powder combustion in lime sleeve kiln. Clean up the solid and liquid residual substances produced by melting. Background technique [0002] The ash in the pulverized coal is a non-combustible substance. During the high-temperature combustion of the pulverized coal, the temperature in the combustion chamber is above 1000°C, and the ash in the pulverized coal melts at a high temperature, producing solid and liquid residual substances, resulting in ash accumulation in the combustion chamber. , Slagging. At present, during the high-temperature combustion of pulverized coal in the combustion chamber, in order to clean up the slagging, the supply of pulverized coal must be stopped, and the maintenance door of the combustion chamber must be opened. After the temperature in the combustion chamber dro...

AI Technical Summary

Problems solved by technology

At present, during the high-temperature combustion of pulverized coal in the combustion chamber, in order to clean up the slagging, the supply of pulverized coal must be stopped, and the maintenance door of the combustion chamber must be opened. After the temperature in the combustion chamber drops below 50°C and the gas in the combustion chamber is detected to be harmless, the slagging shall be carried out. Manual cleaning such as brazing, hammering, water quenching, and external discharge is extremely difficult

Taking the combustion application of pulverized coal in a lime sleeve kiln as an example, this type of kiln has more than ten combustion chambers. Manual cleaning of the combustion chambers requires steps such as coal stop, cooling, slag removal, coal injection, and temperature rise. The cleaning cycle is more than 6 hours, the cleaning frequency is high and the cycle is too long, which seriously affects the heat supply of the lime sleeve kiln

The temperature change caused by coal shutdown and resumption of coal supply in the combustion chamber is the bottleneck of the development of pulverized coal combustion chamber, which restricts the promotion of pulverized coal combustion chamber

The above manual cleaning operations may cause safety hazards to personnel, shorten the life of refractory materials in the combustion chamber, and cause pollution to the surrounding environment of the combustion chamber

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