Rotary cement kiln local full-oxygen-enriched calcining device and process

Abstract

The invention discloses a rotary cement kiln local full-oxygen-enriched calcining device and process. The rotary cement kiln local full-oxygen-enriched calcining device comprises an air purification device, an oxygen-enriched generation device, an oxygen-enriched conveying pipe and a pulverized coal burner which are connected in sequence; the pulverized coal burner is connected with an outlet of aprimary air Roots blower and an outlet of a pulverized coal air Roots blower; an inlet of the primary air Roots blower and an inlet of the pulverized coal air Roots blower are connected with the output end of the oxygen-enriched conveying pipe; and a fire outlet of the pulverized coal burner is connected with a rotary cement kiln. By the adoption of the technical scheme, air used for calcining ofthe rotary cement kiln, namely air used by the pulverized coal burner, is completely replaced with oxygen-enriched gas, the low-level fever value of fire coal is increased, thus the flame temperaturecan be increased to be 180-200 DEG C, the optimal fire coal saving effect is achieved, and the coal saving rate can reach 10% or above.

Description

technical field [0001] The invention relates to the technical field of oxygen-enriched calcination, in particular to a local full oxygen-enriched calcination device and process for a cement rotary kiln. Background technique [0002] At present, the rotary kiln for cement production generally uses ordinary air for combustion, which is carried out in the process of preheating and decomposition outside the kiln and clinker firing. Usually, there are deficiencies in the combustion process, and local oxygen deficiency can easily lead to incomplete combustion. If it is too low, it will also produce incomplete combustion, and the combustible substances will be discharged into smoke and dust, which will waste energy and cause air pollution. The known oxygen-enriched combustion has the advantages of increasing the flame temperature, reducing the ignition point of the fuel, accelerating the combustion speed, increasing the heat utilization rate, and improving the quality of the cement...

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Problems solved by technology

[0004] In order to overcome the shortcomings of insufficient coal combustion and low heat utilization rate in the calcination of the rotary kiln in the prior art, the present invention proposes a local full oxygen-enriched calcination device and process of the cement rotary kiln, by improving the coal of the pulverized coal burner The stability of pulverized coal combustion makes it possible to effectively burn out pulverized coal to stabilize the clinker quality of the rotary kiln, improve the system output and reduce pollution

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