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Ammonia spraying method and system used for desulfurization and denitrification system adopting carbon-based catalysis method

A desulfurization and denitrification, carbon-based technology, applied in the field of environmental engineering, can solve the problem of not being able to inject ammonia gas in a targeted manner, and achieve the effect of meeting different needs

Active Publication Date: 2018-11-02
GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the cross-flow desulfurization and denitrification tower, due to SO 2 Stronger polarity takes precedence over NO x Due to the configuration characteristics of adsorption reaction and cross-flow moving bed, the demand for the amount of ammonia gas used for denitration is different in different areas of the desulfurization and denitrification tower, but the existing ammonia injection device cannot inject ammonia gas in a targeted manner

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  • Ammonia spraying method and system used for desulfurization and denitrification system adopting carbon-based catalysis method

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, the partitioned ammonia injection system of the present invention is used in the carbon-based catalytic desulfurization and denitrification system. The desulfurization and denitrification tower 1 in the desulfurization and denitrification system adopts a cross-flow desulfurization and denitrification tower, wherein the area 2 is the main denitrification area, and the area 3 is the auxiliary denitrification area. area (i.e. the main desulfurization area). The partitioned ammonia injection system includes a smoke box 4, a partition plate 5, an auxiliary nozzle 6, a main nozzle 7, an ammonia injection main pipe 8, a first pneumatic on-off valve 9, an auxiliary ammonia injection branch pipe 10, a main ammonia injection branch pipe 11, a second Pneumatic on-off valve 12, third pneumatic on-off valve 13, first flow regulating valve 14 and...

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Abstract

The invention discloses an ammonia spraying method suitable for a desulfurization and denitrification system adopting a carbon-based catalysis method and a partitioned ammonia spraying system. The ammonia spraying method is used for partitioning smoke boxes, so that ammonia gas with different flow is introduced into different areas, and therefore, dosage of ammonia gas of the corresponding area ina desulfurization and denitrification tower is regulated. Ammonia gas is input into different areas of the desulfurization and denitrification tower to control flow, so that different needs, on dosage of denitrified ammonia gas, of different areas of the desulfurization and denitrification tower can be effectively met.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a partitioned ammonia injection system for dilute ammonia used for denitrification in a boiler flue gas combined desulfurization and denitrification device using a carbon-based catalyst as an adsorbent and a catalyst. Background technique [0002] The principle of carbon-based catalyst flue gas desulfurization and denitrification technology is: under the adsorption and catalytic action of flue gas on carbon-based catalyst, the SO in flue gas 2 and O 2 and H 2 0 reacts to form H 2 SO 4 , H 2 SO 4 Adsorbed on the surface of the carbon-based catalyst; at the same time, using the catalytic performance of the carbon-based catalyst, the NO in the flue gas x Catalytic reduction reaction with dilute ammonia to generate N 2 , the carbon-based catalyst after the adsorption catalytic reaction is regenerated and recycled. Inject diluted ammonia gas into the desulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56
CPCB01D53/8631B01D53/8696B01D53/90B01D2258/0283B01D2251/2062B01D2255/702Y02A50/20
Inventor 孟春强邢德山许芸左程蔡彦吟柏源谷建功
Owner GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD