Lime powder suspension calcining production line and suspension calcining process thereof

Abstract

The invention relates to a lime powder suspension calcining production line and a suspension calcining process thereof. The production line comprises a crushed limestone storage device, a limestone powder preparation device, a feeding device, a suspension calcining cooling device, a fuel supply device, a screening device, a finished product storage device and a waste gas treatment device. The suspension calcining cooling device comprises five stages of heating hoppers, a decomposition furnace and three stages of cooling hoppers. The heating hoppers, the decomposition furnace and the cooling hoppers are communicated through a cyclone feeding pipe, a cyclone return pipe, a material pipe and an inverted-U-shaped air pipe on the top of the decomposition furnace to form an air duct, a draught fan and the fuel gas supply end of the fuel supply device are connected through the air duct, suspension calcining is carried out in the decomposition furnace, the temperature of suspension calcining ranges from 850 DEG C to 1,000 DEG C, the calcining time is within 10 seconds, finally, materials are discharged through the material pipe of the cooling hopper at the tail stage, the materials are screened through the screening device, and then finished lime powder is obtained. The whole production process is in a closed type, environment friendliness is achieved, the heat utilization rate of suspension calcining is increased, and therefore production efficiency and production quality are guaranteed.

Description

technical field [0001] The invention relates to lime production, and relates to a powder lime suspension calcination production line and a suspension calcination process thereof. Background technique [0002] The traditional production methods of lime powder are mostly through the calcination reaction of large-grained limestone blocks, and then the blocky lime is crushed to obtain lime powder. This method is not only inefficient in lime production, but also the calcination reaction cannot ensure the full decomposition of massive limestone, often causing over-burning or under-burning problems, resulting in low yield and poor quality of final lime powder. In addition, traditional lime production not only has low efficiency and low heat utilization, but also has a lot of dust and waste residue, which is easy to cause environmental pollution. In order to solve these problems, the prior art has disclosed some preparations of powdered lime using a suspension calcination process, ...

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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings, the present invention designs a powder lime suspension calcination production line and its suspension calcination process, so that it can solve the technical problems of poor production efficiency and quality of existing similar powder lime production equipment, and poor process heat utilization rate

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