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Direct evaporative cooling device for treating electric furnace dioxins

An evaporative cooling and evaporative cooler technology, applied in the direction of cleaning heat transfer devices, furnaces, incinerators, etc., can solve problems such as complex structure, and achieve the effect of simple structure and good quenching effect.

Pending Publication Date: 2019-06-18
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the above quenching device is relatively complicated, and the upstream of the quenching device is provided with a combustion and settling chamber

Method used

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  • Direct evaporative cooling device for treating electric furnace dioxins
  • Direct evaporative cooling device for treating electric furnace dioxins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the present invention provides a device for controlling dioxin in an electric furnace using direct evaporative cooling technology, including an adiabatic flue 1, an exhaust gas burner 2, a dual-medium spray gun 3, an expansion joint 4, an evaporative cooler 5, and ash storage facilities 6. The adiabatic flue 1 is a steel flue gas channel with a refractory lining, which connects the scrap steel preheating device of the electric furnace and the evaporative cooler 5. The waste gas burner 2 is installed on the adiabatic flue 1, and the medium adopts One or more combinations of natural gas, combustion-supporting air, and combustion-supporting oxygen are used to ignite combustible gases in the flue gas, mainly CO, and play a heating role when the temperature of the flue gas is low. The number of exhaust gas burners and the consumption of media are based on The flue gas parameters are calculated and determined. The dual-medium spray gun 3 is a double...

Embodiment 2

[0036] Such as figure 2 As shown, as a simplified solution of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the flue gas enters the evaporative cooler 5 from the horizontal radial direction, the overall installation height is reduced, and the lower cone section 52 of the evaporative cooler It is also used as an ash storage bin, and the bottom outlet is sequentially connected with a plate valve, a star-shaped ash unloading valve and an ash unloading pipe.

Embodiment 3

[0038] As a simplified solution of Embodiment 1 or Embodiment 2, the difference between this embodiment and Embodiment 1 or 2 is that the waste gas burner is installed inside the scrap steel preheating device of the electric furnace and can be installed instead of the waste gas burner. On the adiabatic flue, or the waste gas burner is on the electric furnace scrap preheating device and the adiabatic flue at the same time. The exhaust gas burner plays a beneficial role in preheating scrap steel during the process of burning exhaust gas or heating flue gas, which can reduce the power consumption of the electric furnace smelting process. Relatively speaking, installing an exhaust gas burner on the scrap steel preheating device has stricter requirements on its internal refractory and heat insulation. Affected by the scrap steel feeding process, the inlet temperature of the evaporative cooler fluctuates greatly.

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Abstract

The invention discloses a direct evaporative cooling device for treating electric furnace dioxins, and belongs to the technical field of dust removal in the metallurgical industry. The direct evaporative cooling device for treating the electric furnace dioxins comprises a heat insulation flue, an evaporative cooler and an ash delivering and storing facility which are sequentially arranged outsidean electric furnace steel scrap preheating device; at least two waste gas burning nozzles are distributed at an inlet of the heat insulation flue in the axial direction of the heat insulation flue, and a plurality of double-medium spraying guns are distributed at an outlet of the heat insulation flue in the circumferential direction of the heat insulation flue; and the evaporative cooler is provided with a flue gas outlet connected with a dust removing system pipeline. According to the direct evaporative cooling device for treating the electric furnace dioxins, the heat insulation flue is taken as a flue gas channel and a combustion chamber concurrently, the evaporative cooler is taken as a quench tower and a settling chamber, the structure is simple, the quenching effect is good, and automatic removing, delivering and concentrated storing of dust can be achieved.

Description

technical field [0001] The invention belongs to the technical field of dust removal in the metallurgical industry, and in particular relates to a direct evaporative cooling device for controlling dioxin in an electric furnace. Background technique [0002] When the primary flue gas produced by the electric furnace passes through the scrap steel preheating device, it will react with the paint and other waste materials on the scrap steel surface to generate highly toxic dioxins. Therefore, the steel industry has clear requirements for dioxin emissions. However, dioxin treatment usually adopts a combination of a combustion settling chamber and a quenching tower. There are various implementations of the quenching link, such as the partition wall heat exchange described in CN201410551669 and CN201711486270, and the regenerative rapid cooling described in CN201110165286. Alkali spray quenching as described in CN201710740785. However, the structure of the above quenching device i...

Claims

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Application Information

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IPC IPC(8): F27D17/00F28G7/00F23J15/06F23G7/06F23J1/06
Inventor 方向蓝飞张斌杨俊
Owner CISDI ENG CO LTD