Material-distribution type cooling process of white cement clinker

A cooling process, white cement technology, applied in clinker production, cement production, etc., can solve the problems of high energy consumption and low output, and achieve the effects of increased clinker output, low consumption, and reduced heat consumption

Active Publication Date: 2014-03-19
江西银杉白水泥股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is a new white cement clinker cooling process proposed to overcome the defects of low output and high energy consumption of the traditional white cement clinker cooling process

Method used

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  • Material-distribution type cooling process of white cement clinker
  • Material-distribution type cooling process of white cement clinker
  • Material-distribution type cooling process of white cement clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] combined with figure 1 described as follows:

[0021] During the process of the high-temperature clinker coming out of the rotary kiln (1) falling into the grate cooler (3), the distributor (6) installed at the front end of the grate cooler removes about 50% of the clinker The material is introduced obliquely into the discharge port on the side of the grate cooler and enters the rotary bleaching machine (5). The material entering the rotary bleaching machine is cooled to 100~300°C by spraying water, and then sent to the clinker storage by the chain bucket conveyor . The steam-containing gas discharged from the rotary bleaching machine enters the electric precipitator at the kiln head for dust removal and then is discharged into the atmosphere.

[0022] The outlet of the rotary bleaching machine is equipped with an infrared thermometer to monitor the temperature of the clinker and adjust the amount of water sprayed by adjusting the opening of the water spray electri...

Embodiment 2

[0029] In Example 1, the proportion of material distribution is adjusted to be 4:6 between the clinker of the rotary bleaching machine and the clinker of the grate cooler, and the other processes are the same as in Example 1. The heat consumption is about 5% lower than in Example 1, but the clinker whiteness is about 1% lower.

Embodiment 3

[0031] In Example 1, the ratio of the material distribution is adjusted so that the ratio of the clinker into the rotary bleaching machine and the clinker in the grate cooler is 3:7, and the other processes are the same as in Example 1. The heat consumption is about 10% lower than in Example 1, but the clinker whiteness is about 2% lower. This scheme can introduce medium-temperature air into the AQC boiler at the kiln head for waste heat power generation.

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Abstract

The invention discloses a material-distribution type cooling process of white cement clinker. High-temperature clinker discharged from a rotary kiln is dropped into a grate type cooler, and a retractable material distributor is arranged on the front end part of the grate cooler in an interpenetrating manner; 20%-60% of granular clinker in the high-temperature clinker fallen from the rotary kiln is introduced by the material distributor to a discharging hole in the side part of the grate cooler to enter a rotary type bleaching machine to be cooled to 100 DEG C-300 DEG C by water spraying; the rest of the clinker particles are subjected to forced air cooling to 80 DEG C-100 DEG C by the grate cooler; high-temperature air preheated by the clinker and one part of medium-temperature air in the grate cooler are respectively provided for fuel combustion of the rotary kiln and a decomposing furnace as secondary air and tertiary air; the other part of the medium-temperature air enters a vertical type coal mill after entering a cyclone dust collector for collecting dust to provide drying hot air; low-temperature air and a vapor-containing gas exhausted by the bleaching machine are exhausted into atmosphere after entering a kiln-head electric dust collector for removing the dust. According to the invention, a material-distributing and cooling method of the white cement clinker can solve a defect that the conventional white cement clinker calcining is free from secondary air and tertiary air; meanwhile, whiteness requirements of the white cement can be ensured, and effects of increasing yield and saving energy can be obtained.

Description

technical field [0001] The invention relates to a white cement clinker cooling and bleaching process and equipment, in particular to a white cement clinker cooling and bleaching process and equipment. Background technique [0002] After the Portland cement clinker is fired at high temperature, it needs to be blown and quenched to ensure that the clinker has good physical and mechanical properties, while the white Portland cement usually needs to be sprayed with water (or sprayed with water or soaked in water) to increase the vitreous body and improve the whiteness of the clinker. degree (i.e. bleaching). Compared with rotary kiln calcining ordinary cement clinker, rotary kiln calcining white cement clinker is wasted due to water cooling, and the heat carried by clinker becomes water vapor. Since the rotary kiln cannot provide secondary air and tertiary air for calcination, As a result, the calcination of white cement clinker needs to consume more heat, and the output is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/47C04B7/48
CPCY02P40/121
Inventor 吴飞龙黄少文
Owner 江西银杉白水泥股份有限公司
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