Asphalt rotary kiln burner

Abstract

The invention provides a burner for an asphalt rotary kiln. The burner comprises a primary air pipe, a secondary air pipe, a gas pipe, a flame adjustment shaft and guide vane wheels, wherein the secondary air pipe is in sleeve connection with the outer side of the primary air pipe; the primary air pipe is in sleeve connection with the outer side of the gas pipe; the flame adjustment shaft is arranged through the center of the gas pipe; and the guide vane wheels are nested at the outer side of a spray head of the gas pipe. Compared with the prior art, the burner provided by the invention has the following advantages: the number of the guide vane wheels is 12; the angle is 60 degrees; rarely used pipes like a pilot light and a burning torch are canceled; air is guaranteed from being sucked into gas jet flows; the shape of flame is long and straight; the hardness is good; the head part of the burner uses a refractory material with long service life; a high-alumina castable material (witha refractoriness of 1680 DEG C) is adopted; sintering is realized with heating of the rotary kiln at a normal working temperature; bursting is insusceptible to generation; and a metal air pipe may notbe damaged by burning.

Description

technical field [0001] The invention relates to an asphalt rotary kiln burner, which belongs to the technical field of asphalt production equipment. Background technique [0002] The main working principle of the rotary kiln burner in the pitch coke calcination device: the rotary kiln is divided into three zones: the preheating zone, the calcination zone and the cooling zone. The burner is set in the center of the head of the rotary kiln. The secondary air is mixed with the flame ejected to make the pitch raw coke entering the tail of the rotary kiln help heat and dehydrate in the preheating zone, and then calcine in the calcination zone by spontaneous combustion of volatile components, and then enter the cooling zone to cool down, and finally obtain a qualified pitch coke product. [0003] The structure of the existing asphalt rotary kiln burner is as follows: Figure 1~4 As shown, including nozzle 1, ignition gun conduit 2, anchor piece 3, heat preservation cover 4, cerami...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned asphalt rotary kiln burner are: due to the small number of guide impellers and poor angle, and the installation of long lights, ignition guns and other pipes (not commonly used) on the upper part of the air outlet, it affects the air being entrained into the gas jet, making The flame shape is deflected and the rigidity is poor; the refractory material of the burner head has a short service life, the outer layer chooses a special corundum product castable (refractoriness: >1840°C), and the inner layer chooses a zirconium-containing ceramic fiber blanket (with a temperature resistance of 1400°C ), in actual use, since the working temperature of the rotary kiln is between 1250 and 1460 °C, the firing temperature of the castable for special corundum products is not enough, it is not easy to sinter, and it will also burst. Ceramic fiber blankets, anchors and metal air pipes; the flame adjustment shaft is easily deformed, and the Round steel, with two positioning support frames in the middle, in the actual use process, the flame adjustment shaft will be flexibly deformed, and the nozzle will droop, making the shape of the flame float upwards, and the rigidity is poor

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