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Device for synchronously decarbonizing and denitrifying industrial flue gas and recycling waste heat

A technology for industrial flue gas and waste heat recovery, applied in gas treatment, indirect heat exchangers, heat exchanger types, etc., can solve the problems of substandard emission, decrease and increase of denitrification activity, etc., to save operating costs and maintain stable temperature , reduce the effect of investment

Active Publication Date: 2022-05-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the same tower body, in the process of synchronous decarburization and denitrification, due to the difference in the reaction temperature range between the two, the sharp rise in the temperature of the denitrification bed in the denitrification process and the excessive oxidation of the reducing agent ammonia, etc. As a result, the denitrification activity is greatly reduced, and the outlet NOX emission is not up to the standard. Therefore, in the process of synchronous decarburization and denitrification, the excess heat generated by the decarburization bed is fully recycled to make the denitrification bed efficient. technology needs are imminent

Method used

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  • Device for synchronously decarbonizing and denitrifying industrial flue gas and recycling waste heat
  • Device for synchronously decarbonizing and denitrifying industrial flue gas and recycling waste heat
  • Device for synchronously decarbonizing and denitrifying industrial flue gas and recycling waste heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this embodiment, the temperature of the flue gas at the 6 flue gas inlets is 100°C to 180°C, and the sequence of decarbonization and denitrification of the flue gas in the decarbonization and denitrification tower 1 is decarburization first and then denitrification, as shown in figure 1 As shown, two decarburization beds 3 and four denitrification beds 4 are arranged sequentially from the flue gas inlet 6 to the flue gas outlet 7. The decarburization bed 3 is filled with a catalyst specially used for decarburization, and the denitrification bed 4 is filled with Catalyst specially used for denitrification. There are two splitter grid pipes 16, and the two splitter grille pipes 16 are respectively arranged upstream of the two decarburization beds 3, and the atomizing nozzle 12 of the ammonia injection equipment is arranged upstream of the first denitrification bed 4. There are two temperature detection points 19, one temperature detection point 19 is set between the tw...

Embodiment 2

[0056] In this example, if Figure 5 As shown, the temperature of the flue gas at the 6 places of the flue gas inlet is 180 ° C ~ 240 ° C, and the sequence of decarbonization and denitrification of the flue gas in the decarbonization and denitrification tower 1 is denitrification first and then decarbonization, from the flue gas inlet 6 to the flue gas outlet 7 Two denitrification beds 4 and four decarburization beds 3 are provided in sequence, the decarburization bed 3 is filled with a catalyst specially used for decarburization, and the denitrification bed 4 is filled with a catalyst specially used for denitration. There are two split grid tubes 16, and the two split grid tubes 16 are respectively set upstream of the first decarburization bed 3 and upstream of the second decarburization bed 3. The atomizing nozzle 12 of the ammonia injection equipment is arranged upstream of the first denitrification bed 4 . One temperature detection point 19 is provided, and the temperatur...

Embodiment 3

[0059] In this example, if Figure 6 As shown, the temperature of the flue gas at the 6 places of the flue gas inlet is 240°C to 280°C, and the sequence of decarbonization and denitrification of the flue gas in the decarbonization and denitrification tower 1 is simultaneous decarbonization and denitrification, from the flue gas inlet 6 to the flue gas outlet 7 in sequence There are six denitrification and decarburization beds 5, and the decarburization catalyst and denitration catalyst in the denitrification and decarburization bed 5 can be the same catalyst or different types of catalysts, depending on the actual application situation, the ultimate purpose is Simultaneously realize decarburization and denitrification. There are two split grid tubes 16, and the two split grid tubes 16 are respectively set upstream of the first denitration and decarburization bed 5 and upstream of the second denitration and decarbonization bed 5. The ammonia injection equipment is set upstream...

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Abstract

The invention provides an industrial flue gas synchronous decarburization and denitrification and waste heat recycling device, the device comprises a decarburization and denitrification tower, ammonia spraying equipment and reaction bed layers, the decarburization and denitrification tower is provided with a flue gas inlet and a flue gas outlet, the decarburization and denitrification tower is internally provided with a plurality of reaction bed layers, and the ammonia spraying equipment is provided with ammonia spraying equipment; the plurality of reaction bed layers are located between the flue gas inlet and the flue gas outlet, a heat exchange inlet and a first heat exchange outlet are formed in the side wall of the decarburization and denitrification tower, an ammonia water inlet is formed in the side wall of the decarburization and denitrification tower, the ammonia spraying equipment is arranged in the decarburization and denitrification tower, and the ammonia water outlet is formed in the side wall of the decarburization and denitrification tower. And the ammonia water inlet is communicated with the ammonia spraying equipment. According to the technical scheme, the arrangement in the decarburization and denitration tower can be dynamically adjusted according to the temperature of the flue gas, decarburization and denitration are carried out in the decarburization and denitration tower at the same time, the equipment investment of step-by-step treatment can be greatly saved, the occupied area can be reduced, and the cost and the operation cost are saved.

Description

technical field [0001] The invention relates to the field of industrial flue gas treatment, in particular to a device for synchronous decarbonization and denitrification of industrial flue gas and waste heat recovery and utilization. Background technique [0002] At present, in the process of industrial production, a large amount of harmful gases are produced, except for SO 2 Outside, CO and NO X It also seriously pollutes the environment and affects people's normal life. With the attention of relevant state departments and the implementation of corresponding ultra-low emission policies, industrial production is facing a severe test of exhaust emission standards. [0003] In view of the diversity of pollution components in industrial waste gas and the further development and application of multi-pollutant synchronous removal technology, synchronous decarbonization and denitrification are receiving extensive attention and research from all walks of life. Advance relevant re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/62B01D53/56B01D53/86B01D53/90F28D1/047
CPCB01D53/869B01D53/864B01D53/90B01D53/8631F28D1/0477F28D1/0472B01D2258/0283B01D2251/2062
Inventor 唐晓龙刘恒恒高凤雨易红宏周远松王成志陈都
Owner UNIV OF SCI & TECH BEIJING
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