Electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system

A technology of circulating superheat and steam system, applied in the field of flue gas waste heat recovery, can solve the problem of low recovery effect of electric furnace flue gas waste heat, and achieve the effect of extensive utilization value, reducing energy consumption per ton of steel and improving economic benefits.

Pending Publication Date: 2018-10-12
BEIJING JINGCHENGKELIN ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the waste heat recovery effect of the existing electric furnace flue gas is not high

Method used

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  • Electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system
  • Electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An electric furnace flue gas duplex heat exchange composite cycle superheated steam system, comprising a first flue 4, a combustion settling chamber 5, a second flue 6 and a waste heat boiler 8 connected in sequence, the electric furnace flue gas duplex The thermal compound cycle superheated steam system also includes a steam drum 10, a storage tank 17, a heat exchanger 171 and a heat accumulator 19. The waste heat boiler 8 is equipped with a steam-water heat exchanger 20 and a heat storage heat exchanger 16. The first steam drum 10 An outlet is connected with the inlet of the steam-water heat exchanger 20 through the first steam-water circulation descending pipeline 14, and the first inlet of the steam drum 10 is connected with the outlet of the steam-water heat exchanger 20 through the first steam-water circulation ascending pipeline 15, and the storage tank 17 The outlet of the storage tank 17 is connected with the inlet of the heat storage heat exchanger 16 through t...

Embodiment 2

[0044] This embodiment is an improvement to Embodiment 1. In Embodiment 1, a deaerator 9 is used to carry out a low-pressure cycle. In this embodiment, the electric furnace flue gas duplex heat exchange compound circulation superheated steam system adopts a high-pressure circulation system, such as figure 2 As shown, at this time, the electric furnace flue gas duplex heat exchange compound cycle superheated steam system does not contain the deaerator 9 , and the main difference between this embodiment and the embodiment 1 is the absence of the deaerator 9 .

[0045] In addition, in this embodiment, the second outlet of the steam drum 10 is respectively connected to the inlet of the first water-cooling structure, the inlet of the second water-cooling structure and the inlet of the third water-cooling structure through the second steam-water circulation downpipe 12 The second inlet of the steam drum 10 is respectively connected to the outlet of the first water-cooling structure...

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Abstract

The invention discloses an electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system. The electric furnace smoke dual-working medium heat exchange compound cyclesuperheated steam system comprises a first flue (4), a burning settling chamber (5), a second flue (6) and a waste heat boiler (8) which are connected in sequence, the electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system further comprises a steam pocket (10), a storage tank (17) and a heat accumulator (19), the first outlet of the steam pocket (10) is connected with the inlet of a steam-water heat exchanger (20) through a first steam-water cycle falling pipe (14), and the first inlet of the steam pocket (10) is connected with the outlet of the steam-water heat exchanger (20) through a first steam-water cycle rising pipe (15). By means of the system, the smoke waste heat can be sufficiently used, continuous production, superheated steam supply power generation and electric energy consumption are achieved, the forced circulation and natural circulation combined water circulation manner is adopted, the electric energy consumption is reduced tothe maximum degree under the condition that the service life of the device is guaranteed, and the electric furnace smoke dual-working medium heat exchange compound cycle superheated steam system is more practical.

Description

technical field [0001] The invention relates to the technical field of flue gas waste heat recovery, in particular to an electric furnace flue gas duplex heat exchange compound cycle superheated steam system. Background technique [0002] In recent years, with the rise of scrap steel prices, domestic electric furnaces have begun to carry out technological innovations. Now the ratio of molten iron conversion has generally increased from the original 10% to 30% to 50%, or even more than 80%. The increase of the ratio of electric furnace to molten iron increases the corresponding oxygen blowing rate, the increase of electric furnace gas, the heat carried in the furnace gas also increases significantly, and the economic benefits of electric furnace flue gas waste heat recovery become more and more obvious. [0003] The cooling equipment for traditional electric furnace flue gas treatment is industrial water cooling, the inlet water temperature is 25°C-30°C, and the outlet water ...

Claims

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Application Information

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IPC IPC(8): F27D17/00F22B1/18F22G1/00F22B33/18
CPCF22B1/18F22B33/18F22G1/00F27D17/004F27D2017/006Y02P10/25
Inventor 黄伟吴仕明杨明华杨源满
Owner BEIJING JINGCHENGKELIN ENVIRONMENTAL PROTECTION TECH
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