Air premixed type flare combustor capable of treating poisonous gas

Abstract

The invention relates to an air premixed type flare combustor capable of treating poisonous gas. A flare gas cylinder body of the combustor is arranged inside an air clamping sleeve body for forming a clamping sleeve body structure, and swirling plates are arranged inside the clamping sleeve body structure; a flare gas nozzle is installed at the upper end of the flare gas cylinder body; a combustion chamber is connected to the outer wall of the upper part of the air clamping sleeve body through a supporting assembly, and the air clamping sleeve body extends into the combustion chamber; a temperature monitoring element is installed on the inner wall of the combustion chamber; the combustion chamber is of a cylindrical shape, and a gap is formed between the lower part of the combustion chamber and the air clamping sleeve body and accepts entry of secondary air; an ever-burning lamp, an igniter and a combustion-assisting device are arranged outside the air clamping sleeve body in the circumferential direction, are connected to the air clamping sleeve body and extend into the combustion chamber. According to the flare combustor, the air partial combustion-supporting mode is adopted, flames are short, combustion is stable, and the burn-off rate of the poisonous exhaust gas is greatly increased; the height and the manufacturing cost of a torch can be effectively lowered on the same exhaust condition.

Description

technical field [0001] The invention belongs to a torch burner, in particular to an air premixed torch burner which can be used to treat poisonous torch gas. Background technique [0002] The flare system is an important safety emission measure in petrochemical enterprises. Its function is to deal with unbalanced gas in petrochemical plants, and to discharge emergency gas during startup and shutdown and accidents. Its performance indicators should meet the requirements of safety and environmental protection. [0003] The development of the national economy, especially the development of the modern chemical industry, has promoted the prosperity of new and expanded organic chemical plants represented by acrylonitrile production plants. Due to the particularity of the production process, the components of the flare gas discharged into the flare system from a typical acrylonitrile production plant are complex, and mostly contain highly toxic and explosive components. Some high...

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Problems solved by technology

[0004] Most of the existing torch burners are diffusion combustion type, which has the following disadvantages: (1) The torch combustion flame is exposed to the external atmosphere, without effective air for combustion, which is greatly affected by the outside world, and the combustion and decomposition of the torch gas is not complete, which is easy to cause damage to the environment Extremely harmful; (2) The air flow at the torch outlet of the commonly used tubular torch head is too concentrated, the flame is a concentrated flame, the air distribution inside and outside the flame area is extremely uneven, and the phenomenon of "poor oxygen" in the center often occurs, which affects the combustion effect; (3 ) There is no effective cascade adjustment between the amount of combustion gas of the flare gas and the internal combustion temperature of the regenerator at the outlet of the flare burner, and there is no effective burnout guarantee for the exhaust gas that requires a high burnout rate; (4) In a limited burnout rate Under certain conditions, in order to meet the requirements of environmental protection indicators, in addition to adopting limited means such as high calorific value gas accompanying combustion, sometimes the design height of the torch can only be artificially increased, and the project cost of the torch also increases accordingly

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