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Strong turbulence combusting system for reducing CO and NOx

A combustion system and turbulent flow technology, applied in the field of domestic waste incineration and pyrolysis gasification, can solve the problems of high original concentration of CO and high original concentration of NOx, and achieve low-oxygen combustion, inhibit the generation of NOx, and inhibit the generation of CO. Effect

Pending Publication Date: 2020-03-27
SHANGHAI SUS ENVIRONMENT
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high original concentration of ...

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  • Strong turbulence combusting system for reducing CO and NOx
  • Strong turbulence combusting system for reducing CO and NOx

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be clearly and completely described below in conjunction with the accompanying drawings and examples of the present invention;

[0016] When the gas in the secondary combustion chamber is combusted, CO is produced mainly due to the fast flow rate of the combustion flue gas, and the disturbance intensity in the secondary combustion chamber is not enough, so the CO in the flue gas will not be fully combusted in the future.

[0017] There are two main types of NOx generation: thermal NOx and fuel-type NOx. Excessively high temperature or uneven temperature field distribution in the secondary combustion chamber can easily lead to thermal-type NOx generation. The larger the excess air coefficient is, the easier it is to generate fuel-type NOx. When the gas in the second combustion chamber is burned, CO is produced mainly because the flue gas velocity is ...

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Abstract

The invention relates to the field of city and town household garbage combustion and garbage thermal pyrolysis, in particular to a strong turbulence combusting system for reducing CO and NOx. The strong turbulence combusting system for reducing CO and NOx is aimed at a fire grate type household garbage combustion or thermal pyrolysis secondary combustion chamber. The strong turbulence combusting system comprises a smoke backflow nozzle, a smoke backflow container, a secondary air nozzle and a secondary air container, wherein backflow smoke enters the secondary combustion chamber through the smoke backflow container and the smoke backflow nozzle, and secondary air enters the secondary combustion chamber through the secondary air container and the secondary air nozzle. The smoke coming fromthe outlet of a bag type duct collector is sprayed into a furnace through nozzles on a front arch and a rear arch of the secondary combustion chamber under the action of a backflow draught fan to formcorner tangential combustion and strong disturbance, sufficient combustion and low-oxygen combustion are ensured, and the original concentration of CO and NOx at the outlet of the secondary combustion chamber is reduced.

Description

technical field [0001] The invention relates to the field of domestic waste incineration and pyrolysis gasification, in particular to a strong turbulent combustion system for reducing CO and NOx. Background technique [0002] In recent years, the processing capacity of domestic waste has been greatly increased, and the reciprocating mechanical grate furnace incineration technology has been widely used in the treatment of domestic waste at home and abroad; for the disposal of rural and township domestic waste, the applicability of the pyrolysis gasification process is stronger. Emission cleanliness is better. At the same time, the flue gas emission standards are becoming increasingly stringent, and achieving ultra-low emissions has become the development trend of the waste heat treatment industry. [0003] However, the existing grate furnace incineration and pyrolysis gas combustion still have the following deficiencies: 1. The disturbance intensity of the secondary air is n...

Claims

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Application Information

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IPC IPC(8): F23G5/14F23G5/50F23G5/44
CPCF23G5/14F23G5/44F23G5/50F23G2202/106
Inventor 龙吉生朱晓平周芳磊谢军严浩文瞿兆舟郑江龙余国涛尤灝袁旗斌
Owner SHANGHAI SUS ENVIRONMENT
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