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Hot air circulation sintering and sintering double-pressure waste heat utilizing system and method

A technology of hot air circulation and waste heat, which is applied in the direction of waste heat treatment, lighting and heating equipment, furnace components, etc., can solve the problems of not considering waste heat and hot air circulation sintering process, so as to achieve full crystallization, reduce heat pollution and dust pollution , The effect of reducing the content of glass phase

Active Publication Date: 2014-03-05
BEIJING ZHINENG XIANGYING ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sintering waste heat utilization method is mainly to use the waste heat of the tail flue of the sintering machine and the waste heat of the flue gas in the high temperature section of the ring cooler to generate steam for process use or power generation, and the process method of combining this part of waste heat with hot air circulation sintering technology has not been considered.

Method used

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  • Hot air circulation sintering and sintering double-pressure waste heat utilizing system and method
  • Hot air circulation sintering and sintering double-pressure waste heat utilizing system and method
  • Hot air circulation sintering and sintering double-pressure waste heat utilizing system and method

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Embodiment 1

[0036] An embodiment of a hot air circulation sintering and sintering dual-pressure waste heat utilization system, see figure 1 , figure 2 and image 3 , the system includes a sintering machine 1 and a ring cooler 2.

[0037] Below the sintering bed of the sintering machine is a flue 1-1, the flue is set corresponding to the length of the sintering bed, a plurality of flue gas ports 1-2 are continuously arranged in the longitudinal direction of the sintering bed from the head end to the tail end, and the flue gas ports are vertically connected In the flue, the ignition port 1-3 of the sintering bed is set at the head end, and the sintered ore moves from the head end to the tail end of the sintering bed through the conveyor belt. The flue is provided with an air inlet 1-1- 1. The air inlet is connected to the low temperature pipeline dust collector 3, the low temperature pipeline induced fan 4 and the chimney 5 in sequence through the low temperature pipeline.

[0038] The ...

Embodiment 2

[0050] A waste heat utilization method based on the hot air circulation sintering and sintering dual-pressure waste heat utilization system in Embodiment 1, comprising the following steps:

[0051] a. Collect the flue gas from the high-temperature section of the sintering furnace flue and the high-temperature section of the ring cooler and send it to the hot air circulation mixer, and the mixer sends the high-temperature flue gas to the sintering bed of the sintering furnace;

[0052] b. When the mixer sends the high-temperature flue gas into the sintering bed of the sintering furnace, it is judged whether the oxygen content of the high-temperature flue gas in the hot air circulation mixer reaches the set threshold;

[0053] c. When the oxygen content of the high-temperature flue gas is lower than the set threshold value, send oxygen to the hot air circulation mixer to make the high-temperature flue gas oxygen content reach or exceed the set threshold value.

[0054] The oxyge...

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Abstract

The invention discloses a hot air circulation sintering and sintering double-pressure waste heat utilizing system and method. The hot air circulation sintering and sintering double-pressure waste heat utilizing system comprises a sintering machine and an annular cooler, wherein the sintering machine and the annular cooler are arranged in a head-tail longitudinal fall mode, a hot air circulation mixer is connected with a sintering machine hot air recovery mechanism and an annular cooler hot air recovery mechanism to collect hot air, and the hot air circulation mixer sends the collected hot air into a sintering bed of the sintering machine. The hot air circulation sintering and sintering double-pressure waste heat utilizing system and method adopt the hot air circulation and sintering technology, the sintering temperature of the upper portion of a material layer is improved, the liquid phase amount is increased, liquid phase viscosity is lowered at the same time, minerals are fully crystallized, the glass phase content is reduced, and therefore the rate of finished products of the whole sintering body and the strength of sintering ores are improved. The 300-500 DEG C hot air circulation technology is adopted to improve the quality of the sintering ores, solid fuel can be saved by 5%-10%, the total heat loss is reduced by 5-8%, dust exhaust amount is reduced by 20%-30%, the high-pressure steam generated by waste heat is supplied to an air-supplementation condensing type turbine generator unit, and the waste heat is fully used.

Description

technical field [0001] The present invention relates to a comprehensive utilization process of waste heat cascade recovery in the sintering process, in particular to a hot air circulation sintering and sintering dual-pressure waste heat utilization system and method, which is to comprehensively utilize the waste heat of the flue of the sintering machine and the waste heat of the ring cooler to carry out hot air circulation sintering, Composite waste heat recovery and comprehensive utilization process of hot air ignition and waste heat power generation. Background technique [0002] At present, the development of the iron and steel industry is facing many problems such as excess production, declining profits, and high pressure on environmental protection. The traditional extensive development model has become unsustainable. It is urgent for enterprises in the industry to focus on reducing costs and increasing efficiency, actively transforming development methods, and using hig...

Claims

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Application Information

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IPC IPC(8): F27D17/00
CPCY02P10/25
Inventor 黄飞刘峰王国臣赵言喜
Owner BEIJING ZHINENG XIANGYING ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
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