Multi-channel mixed gas burner

Abstract

The invention discloses a multi-channel mixed gas burner in the field of burners. The multi-channel mixed gas burner comprises an internal air pipe, a coke oven gas pipe, a converter gas pipe, a blast-furnace gas pipe, a cyclone pipe, an external air pipe, an internal air nozzle, a coke oven gas nozzle, a converter gas nozzle, a blast-furnace gas nozzle, a cyclone nozzle and an external air nozzle, wherein the coke oven gas pipe, the converter gas pipe, the blast-furnace gas pipe, the cyclone pipe and the external air pipe are coaxially sleeved outside the internal air pipe sequentially from inside to outside; the internal air nozzle, the coke oven gas nozzle, the converter gas nozzle, the blast-furnace gas nozzle, the cyclone nozzle and the external air nozzle are connected with the internal air pipe, the coke oven gas pipe, the converter gas pipe, the blast-furnace gas pipe, the cyclone pipe and the external air pipe correspondingly; a coke oven gas cyclone, a converter gas cyclone and a blast-furnace gas cyclone are respectively arranged between the internal air pipe and the internal air nozzle, between the coke oven gas pipe and the coke oven gas nozzle and between the converter gas pipe and the converter gas nozzle; an air deflector is clamped between the cyclone nozzle and the blast-furnace gas nozzle; the external air pipe, the cyclone pipe and the internal air pipe areconnected with an air supply channel by butterfly valves; and entrances are arranged at air supply ends of respective pipelines. By the invention, blast-furnace gas, converter gas and coke oven gas are fully mixed and fully burnt, so burning conditions required by cement burning are met, and the waste and pollution caused by direct discharge of the blast-furnace gas and the converter gas having lower heating values into the atmosphere are avoided. The multi-channel mixed gas burner is applicable to cement production.

Description

technical field [0001] The invention relates to a burner, in particular to a multi-channel burner. Background technique [0002] With the rapid expansion of the scale of the cement industry and the continuous improvement of environmental protection standards, cement factories at home and abroad are thinking about how to improve production quality while reducing production costs in order to maintain competitiveness in the market. [0003] The cement production process commonly used in the prior art includes the following six major steps: 1. Crushing and pre-homogenization; 2. Raw meal preparation; 3. Raw meal homogenization; 4. Preheating decomposition; 5. Burning of cement clinker ; 6. Cement milling. The firing of cement clinker is completed in the rotary kiln. In the rotary kiln, the carbonate is further decomposed rapidly and a series of solid phase reactions occur. As the temperature of the material increases, the solid phase minerals will become liquid phase and dissol...

AI Technical Summary

Problems solved by technology

[0009] The disadvantage of the existing technology is that the cost of fully using coke oven gas is relatively high, but the addition of blast furnace gas and converter gas makes the calorific value lower, which cannot achieve a better combustion effect, thus affecting the quality of cement

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