Industrial workshop catalytic combustion desorption device

Industrial workshop catalytic combustion desorption device

After being collected through pipelines, the exhaust gas enters the activated carbon adsorption system to adsorb organic pollutants in the exhaust gas. The adsorption system generally consists of two sets (designed according to user needs) to ensure that one set performs activated carbon desorption operation while the other performs normal adsorption operation, avoiding the inability to treat the exhaust gas properly during desorption. The exhaust gas is discharged from the exhaust pipe after being adsorbed by activated carbon. When activated carbon is desorbed, the inlet and exhaust valves are closed, the steam cylinder valve is opened, and saturated water vapor is introduced to desorb the activated carbon that has reached saturation value. During desorption, the liquid at the bottom of the activated carbon box flows into the spiral plate heat exchanger, and the gas enters the tube condenser for condensation and liquefaction. After condensation, the liquid enters the water tank, and the upper layer can be reused. If there is no need for recovery, it can be treated with the lower layer liquid in the sewage treatment plant. After desorption is completed, due to the high temperature of the steam, a large amount of water will condense and form when the temperature drops, affecting the normal adsorption of activated carbon. At this time, the drying fan works to blow out the water and ensure that the activated carbon can perform adsorption operation after desorption is completed. Two sets of activated carbon boxes alternate between adsorption and desorption operations. This solution not only has high processing efficiency, but also can efficiently remove organic substances from exhaust gas. Applicable fields: Suitable for extracting various organic solvents with industrial value or synthesizing organic substances with industrial value from organic waste liquids, and achieving certain purity requirements. Recyclable media: waste methanol, waste ethanol, waste ethylene glycol, isopropanol, waste ethylene glycol monomethyl ether, waste ethylene glycol monoethyl ether, acetone, butanone (methyl ethyl ketone), acetate (such as ethyl acetate, butyl acetate), etc.

The exhaust pollution in the furniture manufacturing industry is mainly VOCs, and the VOCs generated during the furniture manufacturing process mainly come from the painting process. Due to different types of furniture, the types of coatings and painting processes may vary, and the emissions of volatile organic compounds may also differ. In the furniture manufacturing industry, wooden furniture has become a key target for VOCs control due to its wide range of emission types and large emissions. Its VOCs mainly come from the storage and transportation of coatings, diluents, curing agents, stirring and mixing during paint mixing, cleaning of spraying equipment, adhesives used in production processes, etc. The spraying workshop is the main source of VOCs and belongs to organized emissions, which is a key control point.

Industrial workshop catalytic combustion desorption device

The VOCs emission reduction in the furniture industry should be carried out from two directions: source control and end of pipe treatment

1. Source control: Advocate the use of coatings and diluents with low VOCs content, such as water-based coatings, UV curable coatings (UV coatings), and benzene free Teidu coatings. Improve technology and equipment, and switch from manual spraying to automatic spraying. Manage the storage, transportation, blending, and use of coatings, diluents, and cleaning agents as required.

2. End of pipe treatment:

(1) Plasma low-temperature catalytic oxidation method. Low temperature plasma degradation of pollutants utilizes the interaction between high-energy electrons, free radicals, and other active particles with pollutants in exhaust gas, causing pollutant molecules to decompose in a very short period of time and undergo various subsequent reactions to achieve the goal of decomposing pollutants.

(2) Adsorption method. By utilizing the large surface residual energy at the molecular level of porous activated carbon, silica gel soil, anthracite, etc., organic gas molecules are adsorbed onto their surfaces for purification.

(3) Isolation law. By using special filtering materials and placing them in the process of exhaust gas discharge, they are mechanically isolated to achieve the desired treatment effect.

(4) Burning method. By using high-temperature heating methods, organic waste gas is directly burned and treated to achieve the goal of waste gas purification.

(5) Absorption method. By using the absorption liquid to come into contact with the exhaust gas, harmful substances in the exhaust gas are dissolved into the absorption liquid, thereby purifying the exhaust gas. The absorption liquid is treated separately.

(6) Condensation method. By condensation cooling, when the temperature is below the condensation point of harmful substances, gaseous harmful substances are converted into liquid and separated from the air, thereby purifying.

The main requirements for exhaust gas treatment equipment are as follows:

1. The gas and liquid inside the equipment should have sufficient contact area and contact time.

2. Gas and liquid have strong disturbances, reducing mass transfer resistance and improving absorption efficiency.

3. Wide operating range, stable operation of exhaust gas treatment equipment.

4. The device has low resistance and low energy consumption.

5. Has sufficient mechanical strength and corrosion resistance.

6. The structure is simple, and the exhaust gas treatment equipment is easy to manufacture and maintain.