Semi-heat accumulating type rotating bed equipment and process for producing large-size high-activity lime

Abstract

The invention relates to semi-heat accumulating type rotating bed equipment and a process for producing large-size high-activity lime. Due to the application of a top combustion nozzle and a heat accumulating combustion nozzle as well as the design of a rotating bed in a longer soaking area, lime with the particle sizes of 10-200mm can be burnt at the same time, and mineral resources are utilizedsufficiently. Small-sized, medium-sized and large-sized lime can be arranged at different layers, so that overburning and unburnt problems are effectively prevented, the unburnt rate is smaller than 0.5%, and the activity of the lime is increased to 380-420ml. Due to the application of the technology of the rotating bed, powder of the lime product is reduced from 12-30% to 3.0-5.0% compared with that of the traditional equipment, the daily output of the lime reaches 1500-4000 tons, and high-efficiency and high-quality production of the lime is realized. High-temperature smoke of the rotating bed is used for preheating limestone; the heat of high-temperature lime is used for preheating combustion supporting air; and the heat in the system is utilized effectively and comprehensively; moreover, the semi-heat accumulating type rotating bed equipment has the advantages of low comprehensive energy consumption, low production cost and obvious economic and social benefits.

Description

technical field [0001] The invention relates to a lime production process, in particular to a heat storage rotary bed equipment and process for producing large-size high-activity lime. Background technique [0002] Lime is widely used in iron and steel metallurgy, non-ferrous metallurgy, calcium carbide production, chemical industry and other industrial fields, and higher quality requirements are constantly put forward for the quality of lime. At present, the technology and equipment of lime production mainly include sleeve type shaft kiln, chain grate machine rotary kiln, parallel flow regenerative double chamber shaft kiln, double D kiln, beam type burner shaft kiln, suspension kiln, CID kiln and so on. Chinese patent application 200810017556.6 discloses a large-scale energy-saving gas-fired kiln for producing raw materials of high-quality calcium carbide and high-quality lime, which adopts a trolley-type elongated horizontal kiln. Chinese patent application 200910086155....

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the present invention proposes a semi-regenerative production of large-size high-activity lime rotary bed equipment and process, which solves the problem of low utilization rate of ore resources and difficult control of raw or over-burning in lime production. , Large fluctuations in lime activity, low production efficiency, high crushing rate, high lime powder content, and high energy consumption of comprehensive finished products, especially solve the technical problems of mixed calcination of 10-200mm large-size high-activity lime, a set of equipment The daily production of high-activity lime is 1500-4000 tons, the burning rate is less than 0.5%, the activity is 380-420ml, and the powder is less than 5.0%

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