A rotary kiln tertiary air duct waste heat recovery device

A rotary kiln and heating device technology, applied in the field of cement processing and manufacturing, can solve problems such as damage, high-temperature corrosion and thermal strain of tertiary air pipes, and achieve the effects of inhibiting thermal strain, solving serious problems of high-temperature corrosion, and efficient heat extraction

Active Publication Date: 2019-07-26
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a rotary kiln tertiary air pipe waste heat recovery device, solve the problem of high temperature corrosion of the tertiary air pipe and damage caused by thermal strain, increase the service life of the tertiary air pipe, and further improve the waste heat utilization level of the cement clinker production line

Method used

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  • A rotary kiln tertiary air duct waste heat recovery device
  • A rotary kiln tertiary air duct waste heat recovery device
  • A rotary kiln tertiary air duct waste heat recovery device

Examples

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Embodiment 1

[0019] Example 1: see Figure 1 to Figure 3 , a rotary kiln tertiary air duct waste heat recovery device, comprising: heat exchange medium inlet 1, header plate 2 at the entrance, heat exchange pipe 3, fixed plate 4, heat exchange medium outlet 5, header plate 6 at the outlet, Flange 7, heat exchange pipe partition 8;

[0020] The heat exchange medium inlet 1 is used to connect to an external waste heat utilization system to connect external water flow;

[0021] The header tray 2 at the inlet is used to arrange a plurality of the heat exchange pipes 3 in a circle; the inlet 1 of the heat exchange medium is arranged on the header tray 2 at the inlet;

[0022] The heat exchange pipe 3 is used for the water flow entering the heat exchange medium inlet 1 to obtain heat in the rotary furnace through convective heat exchange and radiation scattering to form high-temperature water flow and water vapor; the inner wall of the heat exchange pipe 3 Short fins are set, and the outer sur...

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Abstract

The invention discloses a waste heat extraction device for a tertiary air tube of a rotary kiln. The waste heat extraction device comprises a heat exchange medium inlet (1), an inlet header disc (2), a heat exchange pipeline (3), a fixed disc (4), a heat exchange medium outlet (5), an outlet header (6), a flange (7) and a heat exchange pipeline partition (8). According to the waste heat extraction device disclosed by the invention, a heat extraction device is additionally arranged in the middle of the tertiary air tube, and waste heat of the tertiary air tube is efficiently extracted in modes of direct-contact heat exchange, convection heat exchange and radiant heat exchange between a heat exchange tube and cement clinker; generation of thermal strains is inhibited to certain extent, the severe high-temperature corrosion problem of the tertiary air tube is solved, the service life of the tertiary air tube is prolonged, waste heat utilization level of a cement clinker production line is further improved, and an important role is played especially on the cement clinker production line which performs oxygen-rich calcination technical transformation.

Description

technical field [0001] The invention relates to the technical field of cement processing and manufacturing, and particularly relates to a device for extracting residual heat from a tertiary air pipe of a rotary kiln. Background technique [0002] Cement is the main building material in human society, and its industry development is closely related to national economic construction. The cement production industry is a typical high-energy-consuming industry. From the perspective of cement production technology, the waste heat lost by the rotary kiln shell, kiln hood, castor cooler, tertiary air duct and other equipment has not been effectively recovered, which has great energy-saving potential. In the cement clinker calcination process, the tertiary air duct transports the high-temperature air from the clinker cooler as combustion-supporting gas to the fuel combustion area in the calciner. In the working environment of 800-1200°C, the inner wall of the tertiary air duct not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00
CPCF27D17/004Y02P10/25
Inventor 魏小林潘利生李博杨欢
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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