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Wet process ultralow temperature flue gas high efficiency denitration device and method

An ultra-low temperature, gas distribution device technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as easy blockage and scaling, difficult regeneration of desulfurization and denitration catalysts, and unstable operation.

Pending Publication Date: 2019-09-20
江西同兴环保工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The desulfurization and denitrification problems faced by industrial boilers, glass kilns, metallurgical steel sintering furnaces, chemical plants and pickling equipment in my country's flue gas desulfurization and denitrification industry, especially in the development of smelting kilns under low temperature conditions (above 25 ℃) can be recycled The current flue gas desulfurization and denitrification technology is difficult; in addition, there are still problems in the traditional wet process such as low desulfurization and denitrification efficiency, difficult regeneration of desulfurization and denitrification catalysts, unstable operation, easy blockage and scaling, and by-products have no use value.

Method used

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  • Wet process ultralow temperature flue gas high efficiency denitration device and method

Examples

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Effect test

Embodiment 1

[0046] In a denitration device of XXX copper smelting enterprise, the process and device of the present invention are used for practical application, and the combination of solid-state low-temperature mixed-layer catalyst carrier and liquid-phase catalyst is adopted, and the loading capacity of the catalyst carrier is 60m 3 , the catalyst concentration in the solution is 6%, the pH is controlled at 8-9, the flue gas temperature is 40-50°C, and the liquid-gas-liquid ratio is 4-6L / Nm 3 . Flue gas parameters: flow rate 50000Nm 3 / h, NOx content 600-3000mg / Nm 3 , SO 2 Content≤30mg / Nm 3 (pre-desulfurization system). After cyclic catalytic redox, the detected value of SO in the tower flue gas 2 The average content is 0mg / Nm 3 , the average NOx content is 40.7mg / Nm 3 , The desulfurization efficiency is above 99.6%, and the denitrification efficiency is above 95%.

Embodiment 2

[0048] The process and device of the present invention are used for practical application on a denitrification device of a glass manufacturing enterprise in XXX, and a combination of a solid low-temperature mixed-layer catalyst carrier and a liquid phase catalyst is used, and the catalyst carrier loading capacity is 40m 3 , the catalyst concentration in the solution is 6%, the pH is controlled at 8-9, the flue gas temperature is 50-60°C, and the liquid-gas-liquid ratio is 4-6L / Nm3. Flue gas parameters: flow rate 30000Nm3 / h, NOx content 600-1600mg / Nm3, SO 2 Content ≤ 30mg / Nm3 (pre-desulfurization system). After cyclic catalytic redox, the detected value of SO in the tower flue gas 2 The average content is 0mg / Nm3, and the average NOx content is 29.7mg / Nm 3 , The desulfurization efficiency is above 99.6%, and the denitrification efficiency is above 95%.

[0049] From the above examples, it can be seen that the degumming device of the present invention can effectively desulfur...

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Abstract

The invention relates to a wet process ultralow temperature flue gas high efficiency denitration device and method. The device consists of a denitration tower, a pressurization fan, a gas-liquid separation apparatus, a gas distribution apparatus, a circulation tank and a sedimentation tank. The denitration tower is internally equipped with mixed denitration catalyst carrier layers, a demisting unit and spray units; flue gas passes through the pressurization fan, the gas-liquid separation apparatus and the gas distribution apparatus in order to enter the denitration tower; the spray units are communicated with the circulation tank through pipelines, and the circulation tank is internally provided with a liquid catalyst and a reductant; the sedimentation tank is communicated with a position of the denitration tower close to the bottom, and the sedimentation tank is communicated with the circulation tank through an overflow pipe; after entering the denitration tower from the gas distribution apparatus, the flue gas passes through the mixed denitration catalyst carrier layers, the spray unit and the demisting unit in order and is then discharged from the top of the denitration tower. The device and method provided by the invention are suitable for smelting furnace conditions with high and unstable nitrogen oxide content and complex flue gas components, can realize efficient removal of nitrogen oxides under the dual actions of solid and liquid catalysts in a tower after wet desulfurization, the technological process is simple, and the denitration effect is good.

Description

technical field [0001] The present invention relates to the field of environmental protection technology, mainly relates to low-temperature denitrification technology of smelting kiln flue gas, and specifically relates to a wet method ultra-low temperature (25-80°C at room temperature) flue gas denitrification with high efficiency (desulfurization efficiency of more than 99.6%, denitrification efficiency of more than 95%) ) device and method. Background technique [0002] The desulfurization and denitrification problems faced by industrial boilers, glass furnaces, metallurgical steel sintering furnaces, chemical plants and pickling equipment in my country's flue gas desulfurization and denitrification industry, especially in the development of smelting furnaces under low temperature conditions (above 25 ℃) can be recycled The flue gas desulfurization and denitrification technology is difficult; in addition, the traditional wet process still has problems such as low desulfuriz...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56B01D53/90B01D53/96
CPCB01D53/8631B01D53/90B01D53/96B01D2258/0283B01D2251/2067
Inventor 唐剑余仁生黄乃乔张鑫军
Owner 江西同兴环保工程技术有限公司
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