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Device with griddle and process for generating power by efficiently recycling sinter waste heat

A technology of waste heat recovery and power generation equipment, which is applied in the field of high-efficiency recovery of sinter waste heat power generation equipment and technology, can solve the problem of affecting the safety and stability of waste heat power generation system, affecting the power generation and the safety and stability of waste heat power generation system, thermal sintering The short heat exchange time with the cooling air can avoid the fluctuation of waste heat parameters, reduce the amount of returned ore, and reduce the emission of pollutants.

Active Publication Date: 2014-11-05
CITIC HEAVY INDUSTRIES CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Insufficient heat exchange
Cross-flow heat exchange between sinter and cooling air on the belt cooler or ring cooler, the heat transfer effect is poor; the accumulation height of the sinter material layer is low, the heat exchange time between hot sinter and cooling air is short, and the heat exchange is insufficient
[0008] 2. Poor sealing and serious air leakage
The quality of the sealing effect directly determines the performance and power generation of the power generation system. Limited by the structure of the belt cooler or the ring cooler, the seal of the belt cooler or the ring cooler is poor, and the air leakage is serious
[0009] 3. Low utilization efficiency of waste heat
In the existing sintering machine waste heat power generation system, the air is generally taken from the higher temperature sections I and II of the belt cooler or ring cooler, and the heat exchange end difference between the sintering ore and the cooling air is large, the flue gas temperature is low, and the waste heat utilization efficiency is low , the project investment payback period is long
[0010] 4. High power consumption
In addition, because the air leakage problem of the system is difficult to solve, it also increases the cooling power consumption
[0011] 5. Large fluctuations in waste heat parameters affect the safety and stability of waste heat power generation and waste heat power generation system
During the production process of the sintering machine, short-term shutdowns within 30 minutes often occur, resulting in frequent shutdowns of waste heat turbine generators, which seriously affect the power generation and the safety and stability of waste heat power generation systems
[0012] 6. Pollution of the environment
A small part of flue gas with a higher temperature from the ring cooler or with cooler enters the dual-pressure waste heat boiler for utilization. Some of the utilized flue gas is recycled, and some are directly discharged, and most of the rest of the unused flue gas is directly discharged. cause environmental pollution

Method used

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  • Device with griddle and process for generating power by efficiently recycling sinter waste heat
  • Device with griddle and process for generating power by efficiently recycling sinter waste heat

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. As shown in the figure, a sinter waste heat recovery power generation equipment and process with a sieve includes a sinter cooling system, a waste heat power generation system and a flue gas system. The sinter cooling system and waste heat power generation system are connected by the flue gas system to form a circuit;

[0047] The sinter cooling system includes crushing device 2, hot ore screening device 3, hot ore conveying device 4, fine ore conveying device 5, cooling furnace 6, cold ore discharge device 24 and cold ore conveying device 25, crushing device 2 Set at the hot ore outlet of the sintering machine 1, the outlet of the crushing device 2 is connected to the inlet of the hot ore screening device 3, the fine ore outlet of the hot ore screening device 3 is connected to the inlet of the fine ore conveying device 5, and the outlet of the ho...

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Abstract

A device with a griddle and a process for generating power by efficiently recycling sinter waste heat relate to the technical field of waste heat power generation. The device comprises a sinter cooling system, a waste heat power generation system and a smoke system. The sinter cooling system and the waste heat circulation power generation system are connected through the smoke system to form a loop. The process includes 1) sinter cooling, 2) the smoke system and 3) waste heat power generation. The device and the technological process for waste heat power generation have the advantages of completely utilizing waste heat discharged in the sinter cooling process, obviously increasing power generation quantity, obviously reducing system self power utilization rate and being remarkable in energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of waste heat power generation, and in particular relates to a sinter waste heat efficient recovery power generation equipment and process with a sieve. Background technique [0002] The iron and steel industry is an important basic industry of the national economy, and its energy consumption accounts for about 15% of the total industrial energy consumption in the country. It is a key industry for energy conservation and emission reduction. In the process of iron and steel production, the energy consumption of the sintering process is relatively high, generally accounting for 10-12% of the total energy consumption of iron and steel enterprises, second only to the ironmaking process, and has a huge potential for energy saving. In the sintering process, the hot sintered ore discharged from the sintering machine must be cooled to about 150°C before entering the next process. At present, the sinter is cooled by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00F27D15/02F22B1/18F01K11/02
CPCY02P10/25
Inventor 彭岩魏小林王继生仝伟峰王新建时小宝刘怀亮张宏李腾李森
Owner CITIC HEAVY INDUSTRIES CO LTD
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