Three-chamber rare earth recovery waste heat furnace

Abstract

A three-chamber rare earth recovery waste heat furnace relates to the technical field of boilers and comprises a boiler body, the boiler body comprises a smoke chamber, the smoke chamber comprises a first chamber, a second chamber and a third chamber which are longitudinally arranged side by side and sequentially communicated, a smoke inlet is formed in one side of the top of the first chamber, and a smoke outlet is formed in one side of the top of the third chamber. The bottoms of the first chamber and the second chamber are provided with lower connecting ports for communicating the first chamber and the second chamber, the tops of the second chamber and the third chamber are provided with upper connecting ports for communicating the second chamber and the third chamber, and one side of the bottom of the third chamber is provided with a flue gas outlet, so that an S-shaped flue gas flowing channel is formed in the flue gas chamber. According to the scheme, the three-cavity structure side by side is adopted, the S-shaped flue gas flowing channel is formed, the flue gas flowing stroke is longer, and therefore precipitation and recovery of rare earth dust are facilitated, the flue gas speed is suddenly reduced after high-temperature flue gas obtained after rare earth smelting enters the first cavity, large-particle dust in the flue gas can be precipitated and fall into the dust falling hopper when the flue gas turns, and concentrated recovery and utilization are facilitated.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a three-chamber rare earth recovery waste heat furnace. Background technique [0002] In the rare earth industry, in order to extract rare earth elements with application value, it is often necessary to smelt rare earth minerals. At present, there are two common rare earth smelting methods, namely hydrometallurgy and pyrometallurgy. Among them, the pyrometallurgical process is simple, the productivity is high, and the application is more extensive. The common feature of all kinds of pyrometallurgy is that they are produced under high temperature conditions. After production, the rare earth smelting rotary kiln will generate a large amount of high temperature flue gas. The flue gas contains a large amount of rare earth dust, and the dust has strong adhesion. Being able to recycle these tail fumes reduces energy losses. However, the traditional conventional waste heat boilers su...

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Problems solved by technology

However, the current traditional conventional waste heat boilers such as shell-type or flue-type waste heat boilers, because of the structural characteristics of the straight-through flue gas passage, make the flue gas only traverse from one end of the passage to the other end of the passage, and the flue gas circulation is relatively short. The rare earth dust in the flue gas cannot be well precipitated, resulting in a large amount of rare earth dust in the flue gas, so that the flue gas cannot be effectively recycled, and it is easy to cause the concentration of particulate matter in the discharge to exceed the standard, polluting the environment

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