A double-seal unloading method and device for a lime shaft kiln

Abstract

The invention relates to a double-sealed discharge method and device for a lime shaft kiln. A lower flue-dust retainer of a lime shaft kiln is connected with a double-sealed discharge device; the double-sealed discharge device consists of an upper valve body, a middle buffer bin and a lower valve body in sequential connection; the lower valve body is connected with an electric vibration feeder through a flange; during discharge, an upper turning plate is opened, and the lime enters the middle buffer bin through the upper valve body while the lower valve body is kept in a closed state; during discharge to a lower belt, the upper valve body is closed while the lower valve body is opened, and the lime in the sealed discharge device is discharged to a belt machine through the lower valve body; and meanwhile, the upper valve body is in a closed state. According to the method and device provided by the invention, the blanking quantity is large, and the sealing effect is good; the production needs of different types of lime shaft kilns with daily output of 300-800 tons of lime can be met, and the middle buffer bin is of multiple volume specifications and can be replaced according to the output request; and a ceramic material is poured to the contact place between the turning plate and the rubber sealing ring, and thus the service life of the rubber ring can be remarkably prolonged.

Description

technical field [0001] The invention relates to the technical field of lime shaft kiln unloading, in particular to a double-seal unloading method and device for a lime shaft kiln. Background technique [0002] In the field of lime industry production, the sealed discharge devices under the ash hopper of the shaft kiln mainly include the following types: [0003] 1) Single-layer valve sealing device: The single-layer valve sealing device is composed of a single-layer sealing valve and an electric vibration feeder. The electric vibration feeder plays the role of interception and discharge, and the sealing valve plays the role of sealing the discharge chute of the electric vibration feeder. [0004] 2) Double-layer sealing valve: The double-layer sealing valve is installed at the discharge port of the receiving hopper under the kiln, the upper valve acts as a intercepting valve, and the lower valve acts as a sealing function. The double-layer valve is only suitable for discha...

AI Technical Summary

Problems solved by technology

The quality of the three-way gate valve is too high, the height is large, and the investment is large, and there are problems such as air leakage after the valve is worn and air leakage due to the valve not being closed tightly, so it is only used when a large shaft kiln requires a high level of equipment.

[0009] In response to the development needs of the lime shaft kiln, there are more or less problems with the existing unloading device. The single-layer valve, double-layer sealing valve and discharge gate cannot be unloaded under the condition of positive pressure in the kiln chamber. The normal unloading will inevitably lead to changes in the thermal system, reducing the actual production capacity of the shaft kiln

The three-way gate valve is not suitable for large shaft kilns due to insufficient internal space, and the swing angle of the valve core is insufficient, which will cause the material flow to collide with the valve core, and the valve will wear quickly

The star-shaped ash discharge machine is also not suitable for large-scale shaft kilns. Because the unit discharge volume of the equipment is too large, and the lime wears on the rotor, although the sealing effect is good, the discharge volume cannot meet the requirements.

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