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Desulfuration, denitration and energy conservation integrated purification system for coke oven flue gas and control method of system

A coke oven flue gas, desulfurization and denitrification technology, which is applied in the field of metallurgical industry, can solve the problems of increasing energy consumption, and achieve the effects of ensuring safe production, low flue gas resistance, and saving externally supplied fuel

Pending Publication Date: 2017-02-22
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Desulfuration, denitration and energy conservation integrated purification system for coke oven flue gas and control method of system

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Embodiment Construction

[0029] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0030] See figure 1 , a desulfurization and denitrification energy-saving integrated purification system for coke oven flue gas, comprising a waste heat recovery device, a circulating fan 15, an internal combustion engine 17, a pre-oxidation mixing device 19, and a desulfurization and denitrification reaction tower 20; the flue gas inlet of the waste heat recovery device is connected through a pipeline The flue gas discharge pipe of the coking oven 26, the flue gas outlet of the waste heat recovery device is connected to the circulation fan 15 through the pipe, the output end of the circulation fan 15 is connected to the pre-oxidation mixing device 19 through the pipe, and the flue gas outlet of the pre-oxidation mixing device 19 is connected to the desulfurization device through the pipe. The denitrification reaction tower 20 is connected to the chimney 28 ...

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Abstract

The invention relates to a desulfuration, denitration and energy conservation integrated purification system for coke oven flue gas and a control method of the system. An existing flue gas purification method is changed. Firstly, steam is prepared through a waste heat recycling system, and the temperature of the flue gas is lowered; secondly, nitric oxide in the flue gas is oxidized into NO2 through the preoxidation technology; finally, the nitric oxide and sulfide are removed at the same time in a desulfuration and denitration reaction tower, and the aim of purifying the flue gas is achieved. A coaxial internal combustion engine is used as a standby power device in the aspect of safety guarantee, and system safety accidents caused by emergency shutdown and temporary power outage are avoided. Under the condition that same flue gas purification indexes are reached, more waste heat recycling benefits are provided, the temperature of the flue gas does not need to be increased for catalytic reduction, a chimney hot standby system is also not needed, a lot of fuel can be saved, and complexity of a coke oven flue gas purification system is simplified.

Description

technical field [0001] The invention relates to the field of metallurgical industry, in particular to an integrated purification system for desulfurization, denitrification and energy saving of coke oven flue gas and a control method thereof. Background technique [0002] The production of the metallurgical industry is inseparable from the coke produced by the coke oven. However, the fuel used in coke ovens generally adopts coke oven gas, blast furnace gas or other gaseous fuels self-made in the factory. The composition varies greatly, as does the composition of the combustion products. [0003] The main harmful components of flue gas emitted by coke ovens are nitrogen oxides and sulfides. The sulfide comes from the sulfur-containing components in the gas, and the nitrogen oxides come from the high-temperature oxidation of nitrogen in the combustion-supporting air. [0004] With the improvement of the indicators of environmental protection emissions. The flue gas emissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/79B01D53/56B01D53/60F22B1/18
CPCB01D53/56B01D53/60B01D53/75B01D53/76B01D53/79F22B1/1892B01D2251/104B01D2258/0283
Inventor 杨懿徐阳王丽丽
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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