SU734478A1 - Rotary icinerator for burning solid and paste-like wastes - Google Patents

Description

The invention relates to the field of chemical engineering, in particular to rotary drum-type furnaces, and can be used for the incineration of industrial waste from chemical plants. Rotary drum furnaces for burning solid waste, oil sludge from chemical plants and sewage sludge are known, including a rotating tubular chamber with a charging device and a device for removing solid non-combustible residues 1 and C2, which are lined up with refractory bricks. The closest to the technical essence and the achieved effect is a rotary kiln for burning solid and pasty wastes, a tubular chamber with refractory brick, with charging and burner devices and a device for removing solid non-combustible residues, lined with a refractory brick. The camera is equipped with ribs bricks protruding into the chamber and evenly spaced around the circumference. In the fins there are nozzles for air supply, the outlets of which are directed along the tangent and circumference of the furnace in the direction opposite to the direction of rotation of the furnace 3. A disadvantage of the known rotary furnace is the provision of nozzles inside the fins and air supply through them into the furnace, its installation and operation. In addition, it is not possible to burn melted materials such as thermoplastics in a furnace of this design, since the nozzles of the nozzles can be closed with a viscous mass, which will lead to the disruption of air supply. The purpose of the invention is to intensify the process. This goal is achieved by the fact that a rotary kiln for burning solid and pasty wastes, containing a lined inside chamber with evenly spaced and protruding ribs, charging and burning devices and means for removing unburned residues, is provided with a nozzle in the form of a layer of refractory material, and the ribs are located on the helix under the ANGLE 5-45

to the axis of the chamber and directed against the direction of rotation of the tube.

The nozzle can be made, for example, in the form of ceramic pshrikov.

To improve the recycle, the nozzles along the edges of the chamber on the lateral protrusions of their edges of the ribs are grooved. The ends of the chamber are equipped with restrictive claps. The volume of the nozzle is 10-15% of the volume of the furnace chamber. Ribs can be made grappling.

The presence in the chamber of the nozzle in the form of a movable layer of refractory material made, for example, in the form of ceramic balls, makes it possible to increase the burning surface and prevent ingress of viscous waste on the lining of the chamber. When the kiln is rotated, the ceramic balls can move along the edges of the chamber when they are performed along a helix at an angle of 5-45 ° to the axis of the chamber. Due to the discontinuity of the ribs and grooves on the protruding faces, the recycle of the balls is improved, and leakage is prevented by the shoulders at the end of the chamber. With branching of the burning surface, the intensity of waste burning increases significantly.

FIG. 1 shows a vertical section of a rotary kiln for burning solid and pasty waste with ribs made without gaps along the length of the chamber; in fig. 2 - vertical cut of the furnace with intermittent ribs; in fig. 3 shows section A-A in FIG. one; in fig. 4 — node I in FIG. 3

A rotary kiln for burning solid and pasty wastes contains a tubular chamber 1, refractory material 2 lined from the inside, with ribs 3 evenly spaced along an helix at an angle of 5-45 ° and nozzle 4, an inlet chamber 5 with charging 6 and 7 burners and unloading chamber 8.

The ribs 3 of the camera can be made flat (option 1 - fig. 1) and intermittent (option a - figure 2). The nozzle 4 is made in the form of a movable refractory material, for example, ceramic balls. The volume of the nozzle is 10% of the volume of the rotating chamber 1. In order to avoid the balls 4 rolling out of the chamber 1, restrictive shoulders 9 are made of refractory material along the ends of the latter. To improve ball recirculation, protruding ribs of the cells are provided with grooves 10.

The operation of the rotary kiln is carried out as follows.

In the tubular chamber 1 is fed through the burner device 7 fuel and air, and through the loading device 6 - solid and pasty waste to be incinerated. The waste is located at nozzle 4. At the initial moment when the waste

begin to melt, eliminating the possibility of contact with the layer of refractory lining material 2, which ensures the normal operation of the chamber. The molten waste is on the ball

nozzle 4. The nozzle, made in the form of balls, increases the burning surface, thereby contributing to a more complete burnout of waste. Moving the ball of balls when the camera 1 rotates when it is installed at an angle of 1-3 ° will not move to the unloading chamber 8, and due to the presence of the screw ribs 3 returning the nozzle 4, will recycle, maintaining a constant predetermined level in the lower part of the camera 1.

When the tubular chamber 1 rotates, the balls rise by the ribs 3 and when a certain height is reached, the groove 10 rolls down to the bottom of the chamber 1. When the ribs 3 are discontinuous (Fig. 2) recycling, the nozzles 4 will be made in each zone into which the chamber space is divided 1. In order to avoid rolling out the balls 4 from the tubular chamber 1, restrictive collars 9 are made of refractory materials along the ends of the latter. As the chamber 1 is filled with burning waste, it is removed from the chamber through the discharge chamber 8.

This furnace allows to intensify the combustion process, in comparison with the known devices, which is ensured by the presence of a nozzle in a rotating chamber, in the form of moving balls, which, on the one hand, increase the combustion surface, and, on the other hand, prevent ingress of viscous molten waste on lining the camera, contributing

 maintaining optimal-on lining operation mode. The nozzle in the form of balls has the ability to move along the screw edges of the chamber. Making ribs along a helix at an angle of 5-45 ° to the camera axis

E provides the possibility of recycling the movable nozzle with a constant rotation of the chamber, thereby contributing to a better burning out of the waste on the nozzle.

The design of the rotary kiln makes it possible to increase the intensity of waste burnout, the reliability and service life of the equipment, especially the lining, improve the conditions of mixing the waste, reduces the burn time.

Claims (7)

1. A rotary kiln for burning solid and pasty waste containing a chamber lined from the inside with evenly spaced and protruding fins, charging and burner devices and means for removing unburned residues, characterized in that, in order to intensify the process, it is provided with a nozzle in the form of a layer of refractory material, and the ribs are arranged along a helical line directed against the direction of rotation of the furnace. 2 .. The furnace according to claim 1, wherein the nozzle is made in the form of ceramic balls. 3. The furnace according to claim 1, wherein the volume of the nozzle is 10-15% per volume of the chamber. 4. The furnace according to claim 1, characterized in that, in order to avoid leakage of the layer of refractory material, the chamber ends are shoulder. 5. Bake by. 1 and 2, characterized in that, in order to improve the recirculation of the layer of refractory material, grooves are made on the side edges of the fins. 6.Pech on PP. 1-5, characterized in that the screw of the line is inclined at an angle of 5-45 degrees to the axis of the chamber. 7. The furnace according to claim 1, characterized in that the ribs are made intermittent. Sources of information taken into account in the examination 1. The patent of the Federal Republic of Germany 1254801, cl. 24 d 2 1968. 2. The patent of Germany No. 1223980, cl. 24 d 2 1966. 3.Patent of the USSR No. 222283, cl. F 23 G 5/00, 1966 (prototype).