Printing plant exhaust treatment method analysis

Printing plant exhaust treatment due to the production process generated by different exhaust gas, the exhaust treatment methods used are not the same, such as offset printing, gravure printing, screen printing, belonging to the ink category, generally using activated carbon adsorption + catalytic combustion process to manage, the following with the Everest blue editorial take a look at the analysis of the exhaust treatment methods of the printing plant.

Printing plant exhaust treatment spray tower scrubbing method:
Advantage: the initial investment price is relatively inexpensive, suitable for the exhaust gas composition is relatively single;.
Disadvantages: the treatment effect is affected by the operation of the input cost, the equipment covers a large area, the operation of the cost is high, produces a large amount of wastewater, the need for secondary treatment.

Printing plant exhaust treatment activated carbon adsorption device adsorption treatment method:
Advantage: commonly used method, the effect is significant, the principle is simple, mainly the use of activated carbon surface physical adsorption will be separated from the gas VOCs and recycling, combined with the scrubbing tower or catalytic combustion device to deal with the effect is better.
Disadvantage: the activated carbon filter layer needs to be replaced on a regular basis, it is physical adsorption, and the humidity and dust requirements of the waste gas imported into the equipment are high.

Printing plant waste gas treatment catalytic combustion device catalytic combustion treatment method:
Advantage: low investment and operating costs.
Disadvantages: the existence of hidden dangers, the need for explosion-proof measures; produce secondary pollution; the need for manual supervision.

Printing plant waste gas treatment plasma treatment method:
Advantage: low investment and running costs, no secondary pollution;
Disadvantage: the humidity and dust in the exhaust gas have high requirements, for the higher concentration, large air volume of the exhaust gas treatment effect is not significant.

Printing plant waste gas treatment biological method:
Advantage: treatment effect is not chaotic, the later running costs are low, the project is relatively atmospheric, conducive to the improvement of the image of the user;
Disadvantages: large footprint, not flexible enough, high initial investment costs, subject to the influence of the external environment.

Printing plant waste gas treatment plant liquid method:
Advantage: the initial investment price is relatively inexpensive, suitable for the treatment of organic waste gas with complex composition, almost suitable for all situations of organic waste gas treatment;
Disadvantage: the treatment effect is not chaotic.
If the VOCs contain methanol, propyl acetate, ethyl acetate main components account for more than 60% of the entire exhaust gas, and the concentration is relatively high, the choice of exhaust gas recovery device is better.

Above is the printing plant waste gas treatment methods related to the introduction of the catalytic combustion method and activated carbon adsorption method is extremely widely used, the former is the organic waste gas through the catalyst under the premise of high temperature into carbon dioxide and water emissions, only to produce heat recovery, the economic benefits are not obvious, and which the carbon dioxide as a greenhouse gas emissions will be gradually restricted; and the latter is the exhaust gas in the organic matter as it is. The latter is to recover the organic matter in the waste gas as it is, which not only protects the environment, but also realises the reuse of organic solvent resources, and brings higher economic value to the enterprise, which is also the technical method recommended by Weilong. Activated carbon adsorption device for VOCs adsorption and purification, the purified gas is discharged into the atmosphere, compared with other methods, activated carbon adsorption method has a good purification effect, high recycling rate, installation and operation of simple and other characteristics, and scrubbing tower will be better, is currently the printing plant exhaust treatment of waste gas treatment is more widely used in the exhaust gas treatment equipment.