A feeding method for lime mud of lime kiln and feeding equipment thereof

Abstract

The invention provides a feeding method for lime mud of a lime kiln and feeding equipment, namely a triple feeding process for lime mud of a lime kiln. The method includes conveying wet lime mud from a causticization workshop section into a first feeding pushing device; allowing the wet lime mud to enter a riser tube of a flash dryer and to enter into a cyclone separator through a regulation baffle plate along with a rising flue gas stream; discharging the dried lime mud from the bottom of the cyclone separator; allowing the dried lime mud to drop to a lime mud sliding pipe; and conveying the dried lime mud to the bottom of a feeding end of the lime kiln by a second feeding pushing device, wherein when the wet lime mud which does not rise along with the flue gas stream in the riser tube of the flash dryer falls to the bottom of the flash dryer, the wet lime mud can be pushed to the feeding end of the kiln by a third pushing device. The method and the equipment can ensure drying effects of the lime mud, are well-adapted to changes of load and the dryness degree of the lime mud, and can effectively overcome the problem that ineffective circulation occurs due to material accumulation at the bottom of the flash dryer and due to that lime mud is taken away along with flue gas.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and relates to a feeding method of a lime kiln, in particular to a feeding method and a feeding device for a white mud lime kiln. Background technique [0002] White mud, as the secondary polluting solid waste produced by the alkali recovery workshop of pulp and paper making enterprises, produces 1 ton of paper or 1 ton of pulp on average, and produces an average of 0.8-1 ton of papermaking white mud, the main component of which is green liquor (sulfate process The precipitated calcium carbonate produced after causticizing reaction (reaction between lime and carbonate ions) and lime has strong alkalinity and corrosiveness. [0003] At present, the most effective and widely used method in the pulp and paper industry and recognized by the industry is to use the lime mud rotary lime kiln to calcinate the lime mud, and the CaCO in the lime mud 3 It is converted into CaO and reused in the caust...

AI Technical Summary

Problems solved by technology

[0012] The second object of the present invention is to provide a triple propulsion feeding device that realizes the above method, solves the problem of ineffective circulation caused by the accumulation of materials and lime mud at the bottom of the flash dryer with the flue gas, and maximizes the use of new Adaptability, flexibility and convenience of feeding devices to production changes

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