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Adsorption concentration+catalytic combustion (CO) combination machine

Adsorption concentration+catalytic combustion (CO) combination machine

 

 

working principle

The adsorption desorption+catalytic combustion equipment is developed on the basis of adsorption devices with only single adsorption performance, adding desorption regeneration devices to enable the reuse of adsorbents, aiming to reduce the frequency of replacement of active adsorbents and the cost of hazardous waste treatment in the later stage. Activated carbon or zeolite can be used as adsorbents, mainly based on the adsorption performance of the adsorbent and the desorption and precipitation properties exhibited at high temperatures, to adsorb and desorb organic matter. The desorbed exhaust gas enters the catalytic combustion furnace and is oxidized to CO ₂+H ₂ O at a high temperature of 300-400 ° C.

Cn Hm+(n+m/4)+O ₂ 300-400 ° nCO ₂+m/₂ H ₂ O+heat

catalyzer

 

Pre treatment: Due to the porous structure inside the adsorbent, if there are too many large particles in the exhaust gas, the gaps will be blocked, causing the adsorbent to be unable to adsorb the exhaust gas and lose its most basic function; Therefore, front-end pretreatment is an indispensable part of adsorption concentration+catalytic combustion equipment. Dry filters are one of the ways of preprocessing; Generally, two-stage filtration is used, consisting of a primary filter and a medium efficiency bag filter; Suggested particle content ≤ 1mg/m ³. The organic waste gas to be treated is led out through the air duct and enters the dry filter, which can filter the particulate matter and viscous components in the waste gas, and the purification effect can reach over 95%; To improve the adsorption efficiency of activated carbon, extend the adsorption cycle and service life of activated carbon; According to the working conditions, matching water spray can also be chosen to improve the purification effect of pretreatment and reduce the consumables of dry filters.

Gas adsorption process: Utilizing the physical properties of the adsorbent to adsorb VOC organic waste gas, and the honeycomb adsorbent has a large specific surface area and strong adsorption capacity to adsorb the organic waste gas into the micropores of activated carbon, thereby purifying the gas. The purified gas is then discharged through a fan to achieve the effect of organic waste gas treatment;

Desorption gas process: When the adsorption micropores are saturated for a certain period of time, adsorption can no longer be carried out. Then, the high-temperature hot air generated by the catalytic bed is used to desorb the adsorbent. The organic matter in the micropores of the adsorbent will automatically detach from the activated carbon upon high temperature, regenerating the adsorbent. The desorbed organic matter has been concentrated (with a concentration several tens of times higher than before) and sent to the catalytic combustion chamber for catalytic combustion. It is catalytically oxidized on the catalyst at 300-400 ℃ to convert it into harmless CO ₂ and H ₂ O, which are discharged. When the concentration of organic waste gas reaches over 2000mg/m ³, the organic waste gas can maintain spontaneous combustion in the catalytic bed without further heating. A part of the exhaust gas after combustion is directly discharged into the atmosphere, which can meet the heat energy requirements for combustion and desorption, and achieve the purpose of energy saving. The regenerated activated carbon can be used for the next adsorption.

High temperature catalytic combustion process: The catalytic combustion furnace uses a catalyst to change the reaction conditions to achieve combustion of organic matter at lower temperatures, turning it into CO ₂+H ₂ O. The essence of the gas-solid phase catalytic reaction occurring in the catalytic combustion furnace is the participation of reactive oxygen species in deep oxidation. In the catalytic purification process, catalysts are used to reduce the activation energy of chemical reactions, making the reaction conditions more favorable for controllable conditions. With the help of catalysts, exhaust gases undergo flameless combustion at lower ignition temperatures and are oxidized and decomposed into harmless CO ₂+H ₂ O, while releasing a large amount of heat, thus achieving the goal of removing harmful exhaust gases. The internal device mainly consists of a shell, heat exchanger, heating wire, precious metals, etc.

The adsorption desorption+catalytic combustion (CO) combination equipment adopts dual gas path continuous operation. When the workload is large, only multiple adsorption beds are designed for use. One catalytic combustion chamber is used, and under the action of the induced draft fan, the adsorption bed adsorbs the exhaust gas in the airflow. When the adsorbent is almost saturated, the closed valves at both ends of the adsorption bed are closed at the same time, that is, the adsorption work is stopped and the desorption process is carried out. This processing equipment is suitable for enterprises engaged in continuous production.

Product Features

1. High purification efficiency;

2. The catalyst has a long service life;

3. Easy loading of adsorbents;

4. Smooth airflow and low wind resistance;

5. High degree of automation control, multiple safety protection measures, and abnormal alarm system;

6. Intermittent compensation heating, energy-saving and consumption reducing;

When the organic waste gas reaches 2000mg/m ³ or above, it can maintain its natural state.

 

吸附浓缩+催化燃烧(CO)组合机参数

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