High temperature hot air stove for intensive tobacco flue-cured room

Abstract

The high-temperature hot air stove for dense flue-cured rooms includes a furnace, a furnace cover and many fins. The furnace is divided into upper and lower chambers by furnace bars. The upper chamber is the combustion chamber, and the lower chamber is the ash storage chamber. The furnace wall of the combustion chamber includes a metal shell and Refractory lining, ribs are evenly arranged radially outward along the side wall of the metal shell, the furnace cover is arranged on the top of the combustion chamber, and the furnace cover is evenly distributed along the circumferential direction of the side wall with 2 to 4 air supply slots to fill in the secondary air , the extension line of the line connecting the midpoints of the two short sides of the supplementary air slot and the center axis of the furnace cover intersect at the same point, and the lamellar air flow supplied by each supplementary air slot and the line connecting the midpoints of the two short sides of the supplementary air slot and the center of the furnace cover The included angles of the planes determined by the axes are the same, and the top of the combustion chamber organizes tangential cone surface spiral combustion. The invention can be used in the dense flue-cured tobacco room of the tobacco preparation industry, which uses low-sulfur, low-ash clean coal and biomass particle mixed fuel hot air stove, and the emission of soot, SO2 and NOx meets the requirements of the comprehensive emission standard of air pollutants; the combustion efficiency is >95%; the comprehensive Heat exchange efficiency >85%.

Description

technical field [0001] The invention relates to a high-temperature hot air stove for intensive tobacco-curing rooms based on the principles of flaming high-temperature combustion, non-adiabatic combustion, fin radiation heat transfer, and tangential cone-surface spiral combustion. It is suitable for use as a heating device for intensive tobacco-curing rooms in the tobacco leaf processing and modulation industry. Background technique [0002] At present, dense tobacco-curing rooms with good quality of tobacco leaf curing and labor-saving advantages are widely used in various tobacco areas across the country. According to the calculation of the national tobacco leaf planting area of ​​about 21 million mu in 2012, there are about 1.3 million intensive tobacco-curing rooms in the country. These dense flue-cured rooms use hot air stoves with complete combustion and low exhaust temperature, which is one of the important conditions for rural energy conservation and emission reducti...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the fact that the existing cylindrical furnace needs to add coal multiple times, the labor intensity of coal addition and slag removal is high, secondary combustion cannot occur in the gas phase space, the combustion temperature of fixed carbon is low and the combustion time is short, the amount of combustible gas contained in flue gas and the amount of slag contained The amount of carbon is high, the labor intensity of tunnel slag ball cleaning is high, the furnace wall is easy to swell and crack, and the air pan short-circuits into the gas phase space, resulting in insufficient oxygen supply for coal combustion under the slag ball layer, the fixed carbon combustion temperature is low and the combustion time is short, and the slag contains carbon In order to solve the disadvantages of high energy consumption, we invented and designed a kind of technical features such as "flame high temperature combustion, non-adiabatic combustion, fin radiation heat transfer, tangential cone surface spiral combustion", no need for dust removal, and reasonable air flow heat transfer and combustion structure in the furnace. High temperature hot air stove for intensive tobacco flue-cured room

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