CN212339923U - Rotary kiln drying system - Google Patents

Abstract

The utility model discloses a rotary kiln drying system, which comprises a rotary kiln body, wherein a gas pipeline parallel to the axis of the rotary kiln body is arranged in the rotary kiln body; the gas pipeline is arranged below the axis of the rotary kiln body; the gas pipeline comprises a first pipeline matched with the rotary kiln body in length and a second pipeline extending out of the rotary kiln body; a gas valve is arranged on the second pipeline; a plurality of flame nozzle units with the same interval are arranged on the first pipeline; the distance between the fire nozzle units is 5m +/-0.2 m; the flame projecting nozzle unit all includes two flame projecting nozzles, and the flame projecting direction between two flame projecting nozzles is 60 +/-2 contained angles setting. The utility model discloses a rotary kiln drying system can stop the high temperature resistant castables contact in flame and the rotary kiln, makes the heat in the rotary kiln cover whole rotary kiln simultaneously, solves the unbalanced problem of heat.

Description

Rotary kiln drying system

Technical Field

The utility model relates to a rotary kiln application technology field especially relates to a rotary kiln drying system, the inside high temperature resistant castable of mainly used rotary kiln dries by fire the kiln after building by laying bricks or stones again.

Background

The kiln body in the form of the prior rotary kiln needs to be gradually heated and dehydrated after the internal refractory material (castable) is partially or completely replaced, and can meet the requirement of high temperature resistance after reaching the curing temperature. In the stage of dehydrating and drying the kiln, heat can not be concentrated at a certain position in the rotary kiln, and the heat is excessively concentrated, so that the falling of local castable caused by nonuniform heating is easy to occur. The traditional kiln drying mode of the rotary kiln generally adopts a main burner combustion mode (see figure 3), and the temperature is gradually increased to about 1000 ℃ from the normal temperature; this approach has the following disadvantages: 1. the main burner mainly heats materials in the rotary kiln, the introduction amount of fuel gas is large, the length and the shape of flame cannot be effectively controlled, and the flame is easy to contact with a refractory material on the inner wall of the kiln, so that the refractory material directly falls off, and normal production cannot be realized; 2. the length of the flame of the main burner is limited, generally not more than 5 meters, so that the heat supply to the tail part of the rotary kiln is limited, and the heating of the middle part and the tail part of the rotary kiln is not facilitated (the length of the rotary kiln is generally 30-60 meters); 3. because the flame is sprayed in the horizontal direction, the refractory materials below and behind the fire nozzle of the rotary kiln cannot be heated and dehydrated, and dead angles of the kiln drying exist.

In view of the above circumstances, a need exists to design a novel kiln drying system, which can prevent flame from contacting with the high temperature resistant casting material in the rotary kiln, and simultaneously, the heat in the rotary kiln covers the whole rotary kiln, thereby solving the problem of unbalanced heat.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model aims at providing a rotary kiln baker system can stop the high temperature resistant pouring material contact in flame and the rotary kiln, makes the heat in the rotary kiln cover whole rotary kiln simultaneously, solves the unbalanced problem of heat.

In order to achieve the above object, the utility model adopts the following technical scheme:

a rotary kiln drying system comprises a rotary kiln body, wherein a gas pipeline parallel to the axis of the rotary kiln body is arranged in the rotary kiln body; the gas pipeline is arranged below the axis of the rotary kiln body;

the gas pipeline comprises a first pipeline matched with the rotary kiln body in length and a second pipeline extending out of the rotary kiln body;

a gas valve is arranged on the second pipeline;

a plurality of fire nozzle units with the same interval are arranged on the first pipeline; the distance between the fire nozzle units is 5m +/-0.2 m;

the flaming nozzle unit comprises two flaming nozzles, and the flaming direction between the flaming nozzles is set at an included angle of 60 +/-2 degrees.

Preferably, the first pipeline is arranged on the rotary kiln body through a support frame.

Preferably, coal gas or natural gas is introduced into the gas pipeline.

The utility model has the advantages that:

1. the rotary kiln drying system of the utility model shortens the height of the flame by changing the flame direction, and avoids the contact of the flame and the high temperature resistant castable;

2. the rotary kiln drying system of the utility model increases the number of the flame nozzles, so that the heat covers the whole rotary kiln, and the problem of unbalanced heat in the rotary kiln is solved;

3. the utility model discloses a rotary kiln drying system realizes the purpose that progressively heaies up through adjusting the gas valve.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a rotary kiln drying system according to the present embodiment;

FIG. 2 is a schematic view showing the direction of flame striking of the flame-striking nozzle according to the embodiment;

fig. 3 is a schematic view of a conventional rotary kiln.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way.

Examples

As shown in fig. 1-2, the rotary kiln drying system provided in this embodiment includes a rotary kiln body 1, and a gas pipeline 2 parallel to an axis of the rotary kiln body 1 is disposed in the rotary kiln body 1; the gas pipeline 2 is arranged below the axis of the rotary kiln body 1 and comprises a first pipeline 21 matched with the rotary kiln body 1 in length and a second pipeline 22 extending out of the rotary kiln body 1; introducing coal gas or natural gas 5 into the combustion pipeline 2; the first pipeline 21 is arranged on the rotary kiln body 1 through a support frame 6; the first pipeline 21 is provided with a plurality of flame nozzle units 4 with the same interval, and the interval between the adjacent flame nozzle units 4 is 5m +/-0.2 m; the flame spray nozzle units 4 respectively comprise two flame spray nozzles, and the included angle alpha formed in the flame spray direction between the two flame spray nozzles is 60 degrees +/-2 degrees; the second pipeline 22 is provided with a gas valve 3, and the height of flame is adjusted by controlling the gas valve 3, so that the purpose of gradually increasing temperature is realized.

In the rotary kiln drying system in the embodiment, the flame direction is changed by adopting the form of the flame nozzle unit, and the flame height is shortened by controlling and adjusting the gas valve, so that the flame is prevented from contacting with the high-temperature resistant castable; the heat covers the whole rotary kiln by increasing the number of the flame nozzles, so that the problem of unbalanced heat in the rotary kiln is solved; the purpose of gradually increasing the temperature is realized by adjusting the gas valve.

To sum up, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (3)

1. A rotary kiln drying system comprises a rotary kiln body and is characterized in that,

a gas pipeline parallel to the axis of the rotary kiln body is arranged in the rotary kiln body; the gas pipeline is arranged below the axis of the rotary kiln body;

the gas pipeline comprises a first pipeline matched with the rotary kiln body in length and a second pipeline extending out of the rotary kiln body;

a gas valve is arranged on the second pipeline;

a plurality of fire nozzle units with the same interval are arranged on the first pipeline; the distance between the fire nozzle units is 5m +/-0.2 m;

the flaming nozzle unit comprises two flaming nozzles, and the flaming direction between the flaming nozzles is set at an included angle of 60 +/-2 degrees.

2. The rotary kiln system as recited in claim 1, wherein said first conduit is disposed within said rotary kiln body by a support bracket.

3. The rotary kiln system as recited in claim 1, wherein gas or natural gas is introduced into said gas line.

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