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System for cooling vertical furnace and utilizing residual heat

A waste heat and shaft furnace technology, applied in the fields of pellet sintering, annular shaft furnace cooling and waste heat utilization, can solve the problem of low heat exchange rate

Inactive Publication Date: 2010-06-16
崔成群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the heat exchange rate of this method is obviously low

Method used

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  • System for cooling vertical furnace and utilizing residual heat
  • System for cooling vertical furnace and utilizing residual heat
  • System for cooling vertical furnace and utilizing residual heat

Examples

Experimental program
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Effect test

specific Embodiment 1

[0005] Specific embodiment one: typical structure of the present invention. figure 1 Among them, 2 is the inner masonry of the shaft furnace cooling zone, and 4 is the outer masonry. In order to facilitate air induction and heat exchange, the diameter of the outer masonry at the lower part of the cooling zone is enlarged, and 9 is the enlarged masonry. The enlarged cooling zone can reduce air circulation resistance and increase heat exchange area. 3 is a cooling zone. The first is the air grate, which allows outside air to enter the cooling zone, and at the same time controls the direction of the pellets and the cross-sectional shape of the cooling zone to obtain the best cooling effect and combustion air temperature. The 7th, combustion-supporting blower fan. 6 is a pipeline type air distribution bag. 8 is the air-inducing cavity. 6 and 8 all play the effect of equalizing wind pressure. Under the suction of the combustion-supporting fan 7, the external air enters the co...

specific Embodiment 2

[0006] Specific embodiment two: the concise structure of the present invention. figure 2 In the process, under the suction of the combustion-supporting fan 7, the external air enters the cooling zone 3 through the discharge port 10, heats up while cooling the pellets, and enters the burner through the combustion-supporting fan 7. The flow rate of the fan can be adjusted to control the size of the combustion air.

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Abstract

The invention discloses a system for cooling a vertical furnace and utilizing residual heat, and belongs to the technical field of pellet sintering. The problems of low residual heat utilization rate and high pellet-out temperature are universal in the conventional sintering technology. The outside air enters a cooling zone of the vertical furnace under the suction of a combustion fan. The temperature is raised while the temperature of pellets is reduced. Then, the air enters a combustor through the combustion fan. The system for cooling the vertical furnace and utilizing the residual heat improves the temperature of the combustion air, increases a ratio of the combustion air to the fuel, obtains more high-temperature gas by using less fuel, reduces the energy consumption, simultaneously improves the oxidizing atmosphere, contributes to pellet consolidation, reduces the pellet-out temperature, and provides convenience for integral control of the hot air.

Description

technical field [0001] The invention belongs to the technical field of pellet sintering, in particular to the technical field of ring shaft furnace cooling and waste heat utilization. Background technique [0002] At present, there are few technologies for utilizing the waste heat of the annular shaft furnace, and the temperature of the pellets released from the furnace is mostly around 600-1000 degrees, which not only causes energy waste, but also affects the working environment. Some use the air guide wall technology. Under the action of the main induced draft fan, the outside air enters the cooling zone of the shaft furnace from the discharge port. The green balls are heated to realize the utilization of waste heat. However, the heat utilization rate of this method is not high, and the combustion-supporting air cannot be heated, and the entry of a large amount of normal-temperature air will inevitably increase energy consumption. There is also a method in which the comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B1/24F27D17/00
Inventor 崔成群
Owner 崔成群
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