Lignite boiler combustion method capable of reducing nitrogen oxide emission
A nitrogen oxide and boiler combustion technology, which is applied in the field of boiler combustion of lignite, can solve the problems of high operating cost, low denitrification efficiency, and easy slagging of lignite, and achieves the effect of simple structure and high operation reliability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0014] Specific implementation mode 1: Combination figure 1 It is explained that the lignite boiler combustion method that can reduce nitrogen oxide emissions in this embodiment adopts a lignite boiler that is divided into a main combustion zone 1 and a burn-out zone 2 from bottom to top. The main combustion zone 1 and the burn-out zone 2 are burned between the main combustion zone 1 and the burn-out zone 2. The full air nozzle 4 is the boundary; during the lignite combustion process, the amino reductant is atomized and sprayed into the main combustion zone 1, burnout zone 2 and horizontal flue 6 in stages; the excess air coefficient of the main combustion zone 1 is controlled by the air distribution to 0.9~ 1. Excess air coefficient in burn-out zone 2 is 1.15~1.2; NH produced by the amino reducing agent injected in main combustion zone 1 3 The molar ratio of nitrogen oxides to the flue gas in the main combustion zone 1 is 0.5~1.1:1; the NH produced by the amino reducing agent inj...
Example Embodiment
[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the amino reducing agent is injected in three stages, and the first stage amino reducing agent is injected from the first-stage reducing agent nozzle or the secondary air nozzle of the burner 3. In the main combustion zone 1, the second-stage amino reducing agent is injected into the burn-out zone 2 from the over-burning air nozzle 4 and / or the furnace flaring angle nozzle 8, and the third-stage amino reducing agent is injected horizontally from the amino reducing agent third-stage nozzle 9 Flue 6. The other steps and parameters are the same as in the first embodiment.
Example Embodiment
[0017] Specific embodiment three: This embodiment is different from specific embodiments one or two in that the excess air coefficient of the main combustion zone 1 is controlled to be 0.95 through the air distribution, and the excess air coefficient of the burn-out zone 2 is 1.16 to 1.17. The other steps and parameters are the same as in the first or second embodiment.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap