Wind-supplying pipe heat insulation device inside carbon element calcining rotary kiln and its preparation and method for using

A technology of air supply pipe and rotary kiln, which is applied in the application field of refractory materials, and can solve problems such as difficulty in guaranteeing performance, short service life of air supply pipe, and insufficient air supply in the kiln, so as to improve service life, prolong service life, connect Strong and reliable effect

Inactive Publication Date: 2009-08-12
NORTHEASTERN UNIV LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing wrapping technology is generally to apply a certain thickness of refractory castable after welding a certain number of anchor nails on the outer wall of the air supply pipe. This wrapping method has the following disadvantages: on the one hand, for the newly built kiln, During the kiln drying process, the kiln drying curve is mainly formulated according to the properties and characteristics of the refractory material of the kiln body, but the actual temperature rise curve near the air supply pipe is difficult to match with the temperature rise curve required for the air supply pipe wrapping material, which makes it use The performance is difficult to guarantee; on the other hand, for the rotary kiln repaired due to the partial fall off of the castable for the air supply pipe, it is impossible to spend a long time baking it according to the baking curve required for the castable
Due to the above two reasons, the service life of the air supply pipe becomes very short, which does not match the maintenance period of the kiln body. Often, one or several air supply pipes are burned out shortly after the kiln is started. During production, the burnt air supply pipe had to be blocked from the outside, making it lose the air supply function, resulting in a serious shortage of air supply in the kiln, which will have a great impact on the quality of calcined coke
In severe cases, production has to be stopped for maintenance, which seriously affects the output of the rotary kiln

Method used

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  • Wind-supplying pipe heat insulation device inside carbon element calcining rotary kiln and its preparation and method for using
  • Wind-supplying pipe heat insulation device inside carbon element calcining rotary kiln and its preparation and method for using

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The size of the rotary kiln is φ2.84×55m, used for calcining petroleum coke, the speed is 2-3rmp / min, the output is 9-12t / h clinker, and the air supply volume is 16000-1700Nm 3 / h, the air supply ratio between primary air, secondary air and tertiary air is 2:3:5, the air supply pipe is made of φ108×4mm seamless steel pipe, and the wind speed in the pipe is 45-55m / s. The combined heat-insulating wrapping block is mainly composed of pad iron 1, castable material 2, and anchor nail 3, and is hollow and semi-cylindrical, with pad iron 1 arranged on the inner wall. Weld a T-shaped anchor piece 3 every 30mm on one side of the heat insulation prefabricated block on the pad iron 1, and set an outwardly convex semi-circle II6 and semi-circular type on both ends of the combined heat insulation prefabricated block. The inner groove II7 is provided with an outer convex semicircular ring I5 and a semicircular inner groove I4 corresponding to each other on the side. The size and tec...

Embodiment 2

[0022] Rotary kiln size φ2.2×45m, self-weight 214.8t, used for calcining petroleum coke, rotating speed 3-4rmp / min, output 6-9t / h clinker, air supply volume 14000-1500Nm 3 / h, the air supply ratio between primary air, secondary air and tertiary air is 1:3:6, the air supply pipe is made of φ89×4.5mm seamless steel pipe, and the wind speed in the pipe is 40-45m / s. The combined heat-insulating wrapping block is composed of pad iron 1, castable material 2, and anchor nail 3, and is hollow and semi-cylindrical, with pad iron 1 arranged on the inner wall. Weld a V-shaped anchor piece 3 every 30mm on the side of the heat insulation prefabricated block on the pad iron 1, and set a convex semicircular ring II6 and a semicircular annular shape on the two ends of the combined thermal insulation prefabricated block. The inner groove II7 is provided with an outer convex semicircular ring I5 and a semicircular inner groove I4 corresponding to each other on the side. The size and technical p...

Embodiment 3

[0026] Rotary kiln size φ2.5×55m, self-weight 274.8t, used for calcining petroleum coke, speed 3-4rmp / min, output 11-12t / h clinker, air supply volume 17000-1800Nm 3 / h, the air supply ratio between primary air, secondary air and tertiary air is 1:3:6, the air supply pipe is made of φ89×4.5mm seamless steel pipe, and the wind speed in the pipe is 450-55m / s. The combined heat-insulating wrapping block is composed of pad iron 1, castable material 2, and anchor nail 3, and is hollow and semi-cylindrical, with pad iron 1 arranged on the inner wall. Weld a T-shaped anchor piece 3 every 30mm on one side of the heat insulation prefabricated block on the pad iron 1, and set an outwardly convex semi-circle II6 and semi-circular type on both ends of the combined heat insulation prefabricated block. The inner groove II7 is provided with an outer convex semicircular ring I5 and a semicircular inner groove I4 corresponding to each other on the side. The size and technical parameters of the...

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Abstract

A heat insulation device for air supply pipes in a carbon calcined rotary kiln. It is mainly composed of parallel irons, castables, and anchor nails. It is hollow and semi-cylindrical. The inner wall is equipped with parallel irons. Weld a T-shaped or V-shaped anchor nail every 30mm, and set a corresponding outer convex semi-circle II and semi-circular inner groove II on the two ends of the combined heat insulation prefabricated block, and set corresponding ones on the sides An outer convex semicircle I and a semicircular inner groove I. The equipment is prefabricated and fired at high temperature, and the castable used has been baked before the binding block is installed, so its strength and practical performance are not limited by the kiln curve. The equipment and the air supply pipe are welded together by the pad iron attached to the wrapping block, which is convenient for construction and replacement, and can ensure a firm and reliable connection between the two, and the wrapping block is not easy to fall off, which can greatly increase the service life of the air supply pipe.

Description

technical field [0001] The invention belongs to the field of carbon calcining rotary kiln equipment, and at the same time relates to the application technology of refractory materials. It is mainly used for heat insulation protection of the air supply pipeline in the carbon calcination rotary kiln, and can also be used for heat insulation protection of similar thermal equipment. Background technique [0002] As an important thermal equipment, the rotary kiln has been widely used in industrial fields such as burning lime, cement, reducing sintered ore, and incinerating industrial pollutants. Compared with other corresponding thermal equipment, it has better materials Adaptability and high thermal energy utilization. However, the use of it for calcining petroleum coke started relatively late in our country, with only a production history of more than 20 years. Its design is mainly based on similar foreign equipment, and furnaces are used to build furnaces, which often differs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D1/08F27B7/20
Inventor 陈文仲冯明杰孙毅于国友杨光华张晓新王春华
Owner NORTHEASTERN UNIV LIAONING
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