There are 6 packaging material printing machines in a domestic packaging printing factory. Before the transformation, there is no special exhaust gas collection system.The VOCs gas produced by the production is all carried out by the natural ventilation window on the top of the workshop and the axial fan on the outer wall of the workshop. The exhaust gas is collected in an unreasonable way, resulting in unorganized emission of exhaust fumes in the workshop.A large amount of organic solvent exhaust gas produced in the production process is not directly added to the top of the printing machine without a gas hood and exhaust pipe. 4m above the ground) and the surrounding emissions. The air quality in the workshop is extremely poor, causing pollution to the environment around the plant and causing dissatisfaction among the surrounding residents. For this reason, the local environmental protection bureau requires that the waste gas be treated within a limited time.
The deodorant uses plant extraction technology to extract effective ingredients from the roots, stems, leaves, flowers and fruits of various plants, produce action under the action of radiation, improve the activity of plant liquid, and can quickly polymerize with various harmful and odor molecules , Replacement, replacement, adsorption and other chemical reactions, the product is neutral, is an environmentally friendly product that effectively removes waste gas, odor, and odor.
The collection and treatment of VOCs exhaust gas emitted by the printing plant adopts the treatment system of negative pressure local gas collection and ACF organic exhaust gas purification device. The actual use proves that the collection system and the ACF organic waste gas purification treatment system have achieved the expected design requirements for the treatment of VOCs waste gas, but they have not yet been able to meet the national secondary emission standards, and can be further improved in the second phase of the project.
吸附回收的关键是控制吸附床的温度、气体流速和床层高度,一般床层温度越低则回收净化程度越高。 The key to ACF adsorption recovery is to control the temperature, gas flow rate and bed height of the adsorption bed. Generally, the lower the bed temperature, the higher the degree of recovery and purification. We combined the specific engineering situation of the project, taking into account the difference between the industrial installation and the small test, we chose the temperature of the adsorption bed about 35 ℃, the height of the adsorption bed is 150mm, and the removal rate of VOCs gas is controlled at about 80%. Design of ACF adsorption device.
Through practical application and operation, it is shown that in the process of desorption and regeneration of the ACF absorber that adsorbs organic waste gas, the performance of ACF adsorption and desorption speed is fully utilized, and the waste gas of packaging and printing plant VOCs can be treated in this way. Higher purification efficiency, safety and energy saving, and the ability to recover organic solvents for reproduction, which has a wide significance for resource conservation.