Premixing low-nitrogen gas boiler

A gas-fired boiler and premixing technology, applied in the direction of burners, combustion types, combustion methods, etc., can solve the problems that cannot be applied in actual production, and the cost is difficult to popularize and apply.

Active Publication Date: 2022-07-29
XI AN JIAOTONG UNIV +1
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, technologies such as oxygen-enriched combustion are only in the experimental stage and cannot be applied in actual production. Thi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Premixing low-nitrogen gas boiler
  • Premixing low-nitrogen gas boiler
  • Premixing low-nitrogen gas boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] refer to Figure 1-Figure 6 For the premixed low-nitrogen gas fired boiler, the countercurrent swirl mixer 1 can realize the hedging mixing of natural gas and air to ensure the uniformity of the mixed gas; temperature and NO x production volume. Its main structure has the counter-current swirl mixer 1 of the present invention, which includes an outer expanding air swirl blade 1a, an inner constricting air swirl blade 1b and a gas swirl structure 1c, which realizes the swirl hedging mixing of natural gas and air; The mixed gas is uniformly mixed after passing through the baffle plate 2, and the "comb" water-cooled burner 5 behind the lower baffle plate 4, the spiral ring rib 5d can increase the turbulence, strengthen the heat exchange effect, and ensure low-temperature combustion; When loaded, the high-temperature flue gas is entrained and ignited st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a premixing low-nitrogen gas boiler which comprises a countercurrent rotational flow mixer, the countercurrent rotational flow mixer achieves hedging mixing of natural gas and air, a guide plate is arranged at a mixed gas outlet of the countercurrent rotational flow mixer, an upper flow equalizing plate and a lower flow equalizing plate are arranged below the guide plate, the upper flow equalizing plate is located above the lower flow equalizing plate, and the lower flow equalizing plate is located above the upper flow equalizing plate. A channel for enhancing mixing of mixed gas is arranged between the upper flow equalizing plate and the lower flow equalizing plate, the comb-shaped water-cooling combustor is arranged at the rear end of the lower flow equalizing plate, the combustion chamber is arranged at the rear end of the comb-shaped water-cooling combustor, and the ladder-shaped tapered hearth with the vacuum tube bundle arranged inside, the vacuum tube bundle and a working medium water vapor mixture in the vacuum water tank form an inner loop. Uniformity of mixed gas can be improved, combustion stability is guaranteed, the possibility of combustion tempering is reduced, the radiation heating capacity of a hearth can be improved, the local temperature of an outlet of the combustor and the overall temperature of the hearth are greatly reduced, and low-temperature and low-nitrogen combustion is achieved. And the cost is low, and large-scale popularization and application can be realized.

Description

technical field [0001] The invention belongs to the technical field of gas-fired boilers, and in particular relates to a premixed low-nitrogen gas-fired boiler. Background technique [0002] At present, low-nitrogen combustion technologies are widely used, such as staged combustion, flue gas recirculation, oxygen-enriched combustion, rich-lean combustion, etc., as well as denitration technologies such as SCR and SNCR. However, technologies such as oxygen-enriched combustion are only in the experimental stage and cannot be applied in actual production. SUMMARY OF THE INVENTION [0003] In order to overcome the above technical problems, the purpose of the present invention is to provide a premixed low nitrogen gas boiler, which can improve the uniformity of the mixed gas, thereby ensuring the stability of combustion, reducing the possibility of combustion tempering, and improving the radiant heating of the furnace. It can greatly reduce the local temperature of the burner o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F24H1/44F24H9/00F23D14/08F23D14/62F23D14/70
CPCF24H1/44F24H9/0005F24H9/2035F23D14/08F23D14/62F23D14/70F23D2203/007Y02E20/34F24H1/40F23D14/02F23D14/24F23D14/78F23D14/64F23D2214/00F23D2900/14021
Inventor 牛艳青田茂赵军刘红忠
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap