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Method for improving utilization of low-temperature sintering afterheat

A low-temperature waste heat and heat source technology, which is applied in metallurgical energy saving and emission reduction, and sintering low-temperature waste heat utilization fields, to achieve the effect of saving water and improving the comprehensive utilization rate of heat energy

Inactive Publication Date: 2010-09-01
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the cold end of the sintering low-temperature waste heat power generation adopts the direct air cooling method instead of the existing water cooling method, so as to reduce the waste of cooling water and improve the comprehensive utilization rate of heat energy at the same time

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  • Method for improving utilization of low-temperature sintering afterheat

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Embodiment

[0016] The sinter of a steel factory is equipped with 5MW low-temperature waste heat power generation equipment. The cooling tower model is: NH-3000. The cooling water circulation needs to reach about 3000t / h. The cooling water is evaporated and carried by air, resulting in a waste of about 10t / d. Using this method, the cooling tower is changed to an air cooler: air cooler (30RB402GPT08 / 116B), the average inlet air temperature is 5°C in winter, and the outlet air temperature is 9°C; in summer: the average inlet air temperature is 18°C, and the outlet air temperature The temperature is 21°C, and a circular air duct with a diameter of 1600mm is used to guide the lower air box of the ring cooler. Air volume regulating valves are installed on the branch pipes of each air box to balance the air volume. The flue gas collection cover at the outlet of the ring cooler remains unchanged and improved Finally, the cooling of the cold end of the sinter and waste heat power generation can me...

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Abstract

The invention discloses a method for improving the utilization of low-temperature sintering afterheat, which is characterized by comprising the following process steps: switching a cooling mode of a cold source end into air cooling, making cooling air enter a circular cooler again and utilizing the energy of waste gases of sintered ores in the circular cooler as a heat source drive for secondary heating. In the method, the low-temperature sintering afterheat is fully utilized so as to meet the requirement on energy-saving and emission-reduction; and the method has the advantages of short process flow, relatively less pollutant discharge, relatively higher coefficient of recovery, relatively wider application, low-temperature sintering afterheat process flow shortening, relatively simpler process operation control and water saving.

Description

technical field [0001] The invention relates to an improved technology in the field of sintering low-temperature waste heat utilization, and belongs to the technical field of metallurgy energy saving and emission reduction. technical background [0002] Energy consumption and recyclability in the sinter cooling process: For the sinter cooling process, the cooling waste gas is directly emptied, which not only wastes energy, but also causes heat pollution to the environment; if it is air-cooled first, then the hot air is used as low-temperature waste heat Thermal drive for power generation, with a 145m 2 Taking the blower ring cooler as an example, the comprehensive utilization of system heat energy can increase 5MW, and the exhaust air temperature is only about 85°C. [0003] In terms of sintering low-temperature waste heat power generation, there is a common problem: the operation rate is less than 100%. When the temperature of the hot air at the inlet of the waste heat boi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D15/02
CPCY02P10/25
Inventor 王华李明磊王辉涛
Owner KUNMING UNIV OF SCI & TECH