As the fog and haze become more and more
serious, the meaning of environmental protection is increasing. In recent
years, the state has made great efforts to improve the environmental pollution
industry. A series of laws and regulations have been introduced to ensure the
effective implementation of environmental protection measures. The printing company has a large amount of
volatile gas that can destroy the bad environment because of its printing ink.
Therefore, it is necessary to discharge the waste gas in accordance with the
relevant requirements and laws and regulations.
At present, the solvent type ink which is
widely used in the printing process of packaging plastic base material in our
country contains the volatile components of 50%-60%. If the thinner is added to
increase the ink viscosity, the total content of the volatile ink component is
70%-80% when the printing is dried. The gases volatilized by these organic
solvents enter the human body through breathing, causing damage to the human
liver and the nervous system; organic compounds are discharged into the
atmosphere, react with nitrogen oxides, react to photochemistry, form
photochemical oxidants and destroy forests and destroy the ecological environment.
For example, the main products of the
packaging and printing factory are
all kinds of plastic films. In the production, a lot of color inks and organic
thinners are used. The raw materials used in the ink are toluene, ethyl acetate,
acetone and a small amount of butanone. These solvents in the production
process to become a large number of VOCs exhaust emissions. Therefore, we must
adopt effective collection methods and purification processes to deal with VOCs
emissions from the production workshop of packaging printing plants.
The principles for selecting printing ink
exhaust gas equipment should be followed: 1, in line with the long-term
development of enterprises and the actual needs of the current principle of
combining, reasonably determine the scale of the project and process plan; 2.
Under the premise of ensuring the discharge of exhaust gas to meet the
standards, we should try to choose the design scheme with low investment, low
operating cost and small footprint. 3, the established process technology must
be easy to operate and manage, with strong shock resistance.
