SU1291791A1 - Rotary furnace - Google Patents

Abstract

The invention relates to heat engineering equipment and can be used in the chemical, petrochemical, metallurgical and construction industry in rotary kilns, and is aimed at improving the cooling of the metal part of the lining and increasing the effectiveness of the process of neutralizing wet waste. The rotary kiln comprises a housing 1, a loading chamber 2 with an afterburner 3, an unloading chamber 5. The housing is equipped with rows of openings 7 and 8 and is lined inside with refractory bricks 9 (on the side of the discharge chamber 5), and on the side of the loading chamber 2 the lining is made metal concentric shells 11 and 13, separated by combs 10 and forming a cavity with the body, while the shells are attached to the furnace body by rings 12 and 16. The internal shell 11 covers a portion of the refractory lining separated from the cavities by rings 19, captives to the body 1. 1 Il. From € (L Otglyady 10 11 P 7 16 Yu

Description

The invention relates to heat engineering equipment and can be used in the chemical, petrochemical and other industries.

The aim of the invention is to improve the cooling of the metal part of the lining and increase the efficiency of the process.

The drawing shows a rotary kiln.

The rotary kiln contains a housing 1, a loading chamber 2 with an integrated vortex afterburner 3 and a loading device 4 installed in it, a discharge chamber 5 with a burner 6 located inside it. The housing 1 is equipped with rows of holes 7 and 8 and is lined from the inside of the discharge chamber 5 with a refractory brick 9, and on the side of the loading chamber 2 the lining is made in the form of metal concentric shells, spaced from each other by ridges 10, while the inner shell 11 is attached to the body with a ring 12 and The annular cavity 14 communicates with the outer shell 13 through the openings 8 with the inlet manifold 15, and the external shell 13 is attached to the body 1 by the ring 16 and forms an annular cavity 17 connected with the case through the openings 7 with the outlet manifold 18, the brick is lined with brick 9 separated from the cavity 14 by a ring 19 attached to the housing 1,

Rotating oven works as follows.

Through the loading device 4, wet waste is fed to the heated surface of the inner shell 11. Due to the slope and rotation of the furnace body 1, the waste is moved towards the discharge chamber 5. When moving, the waste is dried in a counter-flow of flue gases due to direct contact with them and heat transfer from the inside shell, and then burned in the opposite air Flue gases under the action of vacuum come through the loading chamber

2 into a vortex afterburner 3, in which 55 Lined from the inside with a refractory stainless steel there is an afterburning of combustible flue gas components.

During the operation of the furnace, intensive heating of the inner shell occurs.

11, It is cooled by air, which is fed into the annular cavity 14 through the inlet manifold 15 and a series of holes 8 in the housing 1, the air from

the annular cavity 14, washing the ring 12 of the charging end of the housing 1, enters the annular cavity 17 and through a series of openings 7 is directed to the outlet manifold 18,

The air heated in this way is used as a blast blower, supplying it in the required amount to maintain an optimal combustion mode, and air diffusers are used for other technological needs.

The lining in the form of concentric shells, spaced from each other by combs, fixedly attached to the body with rings in such a way that the inner shell is attached to the body with a ring on the loading side, and the outer shell is attached to the body with a ring separating the rows of holes, compensates for thermal expansions of the shells, eliminates the formation of stagnant zones and provides reliable cooling of the inner shell and the boot end of the body,

. The overlapping of a portion of the refractory lining with the inner shell and the separation of the lining from the cavities by a ring attached to the body protects its end face from contact with waste

and cold air, which significantly increases its life.

Supplying the housing with an additional row of holes through which the cavity communicates with the exhaust manifold allows the necessary amount of air to be supplied to cool the ribs without disturbing the combustion process.

The advantage of the furnace design

This is an increase in the effectiveness of the process of neutralization of wet waste, as well as an improvement in the cooling of the metal part of the furnace lining.

Claims (1)

50 claims A rotary kiln containing a loading and unloading chamber, a cylindrical metal housing. on the side of the loading chamber - steel rolled, forming a cavity with the body, communicating with the inlet manifold through a row of holes that are filled in the body, which, in order to improve cooling of the metal part of the lining and increase the efficiency of the process It is equipped with an exhaust manifold, an additional series of holes are made in the housing, which communicate with the exhaust manifold, and the lining on the side of the loading chamber is made in the form of concentric shells spaced apart from one another. ebn mi and not : is fixedly attached to the housing by rings, while the inner shell is attached to the housing by a ring on the loading side, the outer shell, which forms a cavity with the housing, communicating through an additional row of holes with a discharge manifold, is attached to the housing by a ring separating the row of holes, refractory lining of the compartment from both cavities by a ring attached to the body and the inner shell.