Dry method cement rotary kiln surface waste-heat utilization method and device

A technology of cement rotary kiln and dry process cement, which is applied in the steam generation method using heat carrier, cement production, rotary drum furnace, etc., to achieve good promotion value, convenient installation, and various functions.

Inactive Publication Date: 2007-05-23
周玉芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the purpose of the present invention is to provide a method and device for utilizing the waste heat on the surface of a large-scale dry-process cement r

Method used

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  • Dry method cement rotary kiln surface waste-heat utilization method and device
  • Dry method cement rotary kiln surface waste-heat utilization method and device
  • Dry method cement rotary kiln surface waste-heat utilization method and device

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Embodiment 1

[0038] A method for utilizing waste heat on the surface of a dry-process cement rotary kiln, which is to install a plurality of heating devices on the outer surface of the cement rotary kiln, which have heating functions and produce medium and low pressure steam, so that the surface heat energy of the rotary kiln can be transferred through radiation and convection. The method is passed to the heat extraction device, the water or steam in it is heated, the steam generated from the heat extraction device is introduced into the steam turbine, and the generator is driven for waste heat power generation, or the steam is introduced into the steam engine as mechanical power or introduced into other places that need steam for waste heat use.

[0039] According to the structure of the cement rotary kiln, on the premise of not affecting the process and structure of the existing rotary kiln, the present invention adopts a cascade utilization method for the different surface temperatures o...

Embodiment 2

[0041] The method for utilizing surface waste heat of a dry-process cement rotary kiln is a device for utilizing surface waste heat of a dry-process cement rotary kiln in which an evaporator and a superheater are separated. As shown in Fig. 1 and Fig. 2, the device is composed of 4 heat-taking devices 2-1, 2-2, ..., 2-4, which are composed of a sealed hollow shell that surrounds the outer surface of the rotary kiln and functions as an evaporator and a superheater. There is a small gap 251 between the sealed hollow shell and the rotary kiln shell, and the superheater and evaporator of each heat-taking device are respectively composed of the upper half of the sealed hollow shell that acts as a superheater and the sealed hollow shell that acts as an evaporator. The lower part of the hollow shell is composed of (see Figure 1 and Figure 2). There is a water inlet pipe or an air inlet pipe 261 at the lower part of the evaporator 211, and an air outlet pipe 271 at the upper part of th...

Embodiment 3

[0043]Another device for utilizing the surface waste heat of the dry-process cement rotary kiln adopted in the method for utilizing the surface waste heat of the dry-process cement rotary kiln. As shown in Figures 4 to 6, the device is composed of four heat-taking devices 2-1, 2-2, ..., 2-4, which are composed of a sealed hollow shell that surrounds the outer surface of the rotary kiln and acts as an evaporator and a superheater. Each of the heat-taking devices is composed of sealed hollow shells that surround the front and rear sides of the rotary kiln, the bottom of each sealed hollow shell is sealed, and the upper half of the front and rear parts The 1 / 4~2 / 4 part of the upper part is the superheater 222 which acts as a superheater, the lower 2 / 4~3 / 4 part is the evaporator 212 which acts as an evaporator (see Figure 4), each sealed hollow shell The body is filled with water, and the height of the water is 2 / 4 to 3 / 4 of the height of the sealed hollow shell. The upper part of...

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Abstract

It relates to a cement rotary kiln surface residual heat utilization with the said surface with heating device and heat drawing device from the low pressure vapor in production, transmitting the heat of the rotary kiln to the heat drawing device through radiation and convection, introducing the vapor generated from the heat drawing device to the steam turbine, driving the generator, steam engine or other places for reutilization of the residue heat. It is formed by n heat drawing devices of sealing hollow housings around the rotary kiln and evaporator, 1<=n<=60, leaving a small clearance between the sealing hollow housing and the rotary kiln housing, with each heat drawing device having a bottom intake for water or gas, a top exhaust, and an insulation layer outside the seal housing. It is reasonable, simple, practical and low in cost.

Description

Technical field: [0001] The invention relates to a low-temperature waste heat utilization technology of a rotary kiln for a large-scale dry-process cement production line, in particular to a method and a device for utilizing surface waste heat of a dry-process cement rotary kiln. Background technique: [0002] As we all know, on the surface of the dry-process cement rotary kiln, there are a large number of low-temperature waste heat resources that are not lower than 150°C 24 hours a day, and the surface temperature of the kiln head is as high as 300°C. If it is damaged, it is even necessary to use a fan to blow the surface of the kiln head to reduce the surface temperature of the rotary kiln, so that a large amount of waste heat resources will be wasted in vain. [0003] At present, the use of hot waste gas discharged from the kiln head grate cooler for cooling clinker in cement rotary kilns and the utilization of rotary kiln exhaust gas have attracted more attention, and ma...

Claims

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Application Information

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IPC IPC(8): F27B7/38F22B1/02
CPCY02P40/121
Inventor 黄华
Owner 周玉芬
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