Quicklime coupling and digesting device

Abstract

The invention discloses a quicklime coupling and digesting device. The device comprises a frame, wherein the frame is provided with a primary coarse particle digesting region, a secondary coupling and digesting region and a complete digesting region in sequence; the front part of the primary coarse particle digesting region is provided with at least one charge port, the back of the complete digesting region is provided with at least one discharge port, a first water-spraying device is arranged on the upper part of the primary coarse particle digesting region, a second water-spraying device and an additive device are arranged on the upper part of the secondary coupling and digesting region; a first stirring component, a second stirring component and a third stirring component are arranged in the primary coarse particle digesting region, the secondary coupling and digesting region and the complete digesting region respectively; and the first stirring component, the second stirring component and the third stirring component are all connected with a driving device. By adopting the invention, the scaling and blockage of the device can be avoided, quicklime with poor activity can be digested and a multifunctional flue gas cleaning agent can be prepared; and the invention has stable operation, small floor space and higher digestion efficiency.

Description

【Technical field】 [0001] The invention relates to the field of flue gas desulfurization, in particular to a quicklime coupled digestion device used in flue gas desulfurization. 【technical background】 [0002] Existing dry powder desulfurizers for dry flue gas desulfurization are usually produced by digesting quicklime and mature lime by fluidization or mechanical agitation; the fluidization method of lime digestion is to add water to the quicklime in the digestion tower through the input of fluidization wind Digestion, the ash gas mixture at the outlet of the digestion tower passes through the separation device to circulate the coarse particles into the digestion tower to continue digestion, and the qualified products enter the finished product warehouse for use. Lime digestion is carried out by mechanical stirring, which is produced by adding water to the mixer to mix and digest quicklime and water. [0003] The disadvantage of the fluidization method for preparing slaked ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the fluidization method for preparing slaked lime is that it is easy to foul the inner wall of the digestion tower and form a blockage, which eventually leads to the ineffective operation of the digestion system. At the same time, a separation device must be installed outside the digestion tower to achieve this. It reduces the safety of system operation, so this method has been used less to produce slaked lime

[0004] Disadvantages of the traditional mechanical stirring method to produce slaked lime: 1) Only add water to the first-stage agitator, and the control of adding water needs to be very precise. Lime agglomeration will block the agitator, and the evaporated water will cause the exhaust system to block; 2) The upper and lower agitators are connected by pipelines, which are easy to block when the material flows; 3) The operating temperature of the lower agitator is low, so it cannot be used The poor-quality quicklime is completely digested; 4) only a single quicklime slaking can be realized, and a multi-functional flue gas purifier (such as a combined desulfurization and denitrification agent) cannot be produced; 5) the finished product needs to be stored in an intermediate warehouse and is easily inactivated Easy to clog pipes

Images