Ammonia process SCR-SNCR coupling flue gas denitrification reactor

A denitrification reactor and flue gas technology, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of non-uniform injection of ammonia, low flue gas efficiency, poor sealing, etc., to achieve thorough denitrification reaction, improve Effects of Processing Efficiency and Effectiveness

CN106731792APending Publication Date: 2017-05-31江苏诺伊拓环保工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-05-31

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Abstract

The invention discloses an ammonia process SCR-SNCR coupling flue gas denitrification reactor which comprises a denitrification body. The denitrification body comprises a hearth, a transition section, a catalyzing section and a gas outlet section, a first reducing section is arranged between the hearth and the transition section, a second reducing section is arranged between the transition section and the catalyzing section, the periphery of the first reducing section is sleeved with an annular ammonia spraying mechanism, and the periphery of the second reducing section is sleeved with an ammonia equivalent injection mechanism. The annular ammonia spraying mechanism and the ammonia equivalent injection mechanism are both connected with an ammonia adding system, and a multi-channel gas mixer is arranged between the second reducing section and the catalyzing section. The catalyzing section is provided with at least one layer of catalyst module. The SCR-SNCR reactor is simple in overall structure, reasonable in design and low in cost, nitric oxide treatment efficiency is greatly improved, ammonia spraying operation is more uniform and comprehensive, a reducer and nitric oxide can be mixed more fully for reacting, reaction efficiency is high, the effect is good, and the reactor is good in airtightness, more environmentally friendly and safer.
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Description

technical field

[0001] The invention relates to the technical field of environmental protection equipment, in particular to an ammonia method SCR-SNCR coupled flue gas denitrification reactor. Background technique

[0002] At present, the SCR process is mainly divided into two types: ammonia-based SCR and urea-based SCR. X The reduction function, under the action of the catalyst, NO X (mainly NO) reduced to N which has little effect on the atmosphere 2 And water, the reducing agent is NH3, in the chemical industry, power plants and other industries will produce more flue gas, and the flue gas contains more nitrogen oxides, if the nitrogen oxides in the flue gas are not treated in time, it will Cause respiratory diseases such as bronchi and emphysema, damage plants, easily form acid rain, acid mist and other major pollutants, easily interact with hydrocarbons to form photochemical smog, and nitrogen oxides also have certain damage to the ozone layer, so in Flue gas must be...

Examples

Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Refer to attached Figure 1-6 The ammonia-based SCR-SNCR coupled flue gas denitrification reactor includes a denitrification main body, and the denitrification main body includes a furnace 1, a transition section 15, a catalytic section 17, and an air outlet section 18, and the air outlet section 18 is also provided with air preheating A device 10 and a dust collector 11, the air preheater 10 is connected to the furnace 1, and the dust collector 11 is arranged in the gas outlet section 18, and performs dust removal treatment on the pre-discharged and qualified flue gas, so that the discharged The gas is more environmentally friendly and safe. The transition section 15 is also provided with an economizer 21; a...