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Novel two-stage type converter gas waste heat recovery system

A waste heat recovery system and converter gas technology, applied in furnaces, waste heat treatment, furnace components, etc., can solve problems such as high system safety requirements, achieve enhanced heat transfer effects, increase sensible heat recovery rate, and increase gas flow speed Effect

Active Publication Date: 2015-11-18
WUXI YIEN TECH
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Problems solved by technology

Therefore, the "LT" dry electrostatic dust removal purification method is better than the "OG" method for gas purification, but it has high requirements for system safety.

Method used

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  • Novel two-stage type converter gas waste heat recovery system

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Embodiment Construction

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0023] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0024] Such as figure 1 The new two-stage converter gas waste heat recovery system shown sequentially includes a connected converter 1, a converter flue 2, a high-temperature cyclone separator 3, a fire-tube type natural circulation converter gas waste heat boiler 6, and a gas dust removal and purification device 7. The gas dedusting and purification device 7 is connected to the converter gas storage cabinet 9 and the chimney 10 through the first three-way switching valve 8 respectively. It also inc...

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Abstract

The invention discloses a novel two-stage type converter gas waste heat recovery system. The novel two-stage type converter gas waste heat recovery system sequentially comprises a converter (1), a converter flue (2), a high-temperature cyclone separator (3), a fire tube type natural circulation converter gas waste heat boiler (6) and a gas dust removal purification device (7) which are connected. The gas dust removal purification device (7) is connected with a converter gas storage cabinet (9) and a vent stack (10). After gas generated by the converter (1) is subjected to evaporation cooling through the converter flue (2), the temperature is decreased to 800-1000 DEG C from 1400-1600 DEG C; then, the gas enters the high-temperature cyclone separator (3), so that more than 50% of coarse-particle dust in the gas are separated out; afterwards, the gas enters the fire tube type natural circulation converter gas waste heat boiler (6). Through the novel two-stage type converter gas waste heat recovery system, waste heat can be recovered under the condition that zero leakage of smoke is guaranteed, and meanwhile wastewater treatment cost caused in the later period can be reduced.

Description

technical field [0001] The invention relates to the technical field of gas waste heat recovery and purification in converter steelmaking, in particular to a novel two-stage converter gas waste heat recovery system. Background technique [0002] About 70% of the total steel output in my country is smelted by the oxygen top-blown converter, and the recycling technology of converter gas is closely related to environmental protection and energy saving. The by-product produced in the oxygen top-blown converter smelting is 1400-1600 ℃ converter gas, and its energy quality is high-temperature gas sensible heat and calorific value 7000-8000KJ / Nm 3 of chemical energy (CO). In order to improve the energy recovery rate and reduce environmental pollution, the "OG" wet dust removal and purification method and the "LT" dry electrostatic dust removal purification method are generally used for the recovery and purification of converter gas in domestic and foreign industries. From the comp...

Claims

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Application Information

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IPC IPC(8): C21C5/40F27D17/00
CPCY02P10/25
Inventor 惠建明郁鸿凌惠文博
Owner WUXI YIEN TECH
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