Automatic discharge sealing device for return chute of lpd type preheater

Abstract

The invention relates to an automatic discharging and sealing device for an LPD type preheater material returning elephant trunk. The automatic discharging and sealing device comprises a spring anti-blocking buffering device, a pulling rope and a sealing cover plate. The spring anti-blocking buffering device comprises a shell, a front plate, a pull rod and a spring; the shell is vertically installed at the lower end of a hydraulic push rod of a preheater, the middle of the front plate is provided with an open pore and is fixed to the other end of the shell, the tail end of the pull rod is provided with a vertical tail plate, the pull rod is arranged in a cavity of the shell, and the front end of the pull rod penetrates out of the open pore of the front plate; and the position, between the tail plate and the front plate, on the pull rod is sleeved with the spring, the front end of the pull rod is connected with the pulling rope, the sealing cover plate is arranged at a discharging opening in the lower end of the material returning elephant trunk, one side of the sealing cover plate is connected with the pulling rope, and the other side in circumferential correspondence with the first side is rotatably connected with the material returning elephant trunk. By means of the automatic discharging and sealing device, the requirement for automatic discharging of the LPD type preheater material returning elephant trunk can be met in normal production, the situation that the hydraulic push head pull rod is blocked and broken due to the fact that the material returning elephant trunk is full of materials is prevented, the cold air suction volume of the preheater is reduced, it is beneficial to stabilization of hot process parameters, and energy consumption is lowered.

Description

technical field [0001] The invention belongs to the technical field of discharge and sealing of a return chute of an LDP preheater, in particular to an automatic discharge sealing device for a return chute of an LPD preheater. Background technique [0002] When the feeding push head of the LPD type vertical preheater completes the return stroke of each feeding action, some uncontrollable return materials will be brought back. These return materials are drained and recovered through the return chute installed at the end of the push head. At present, the opening and closing of the return chute is controlled by the weight valve at the outlet end of the chute, but the failure rate of this weight valve discharge method is high, the automatic opening and closing function often fails, and the discharge effect is very poor. As for the fact that the return material chute is often full, the return material cannot be discharged in time when the push rod is actuated, thereby causing equ...

AI Technical Summary

Problems solved by technology

However, the negative pressure process in the preheater will inhale a large amount of natural cold air through the return chute, dilute the temperature of the hot air flow in the preheater, reduce the recovery and utilization efficiency of waste heat from the kiln tail exhaust gas, and indirectly increase the energy consumption of the rotary kiln

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