Analysis of organic waste gas treatment methods for circuit boards

Circuit boards are mainly used in the manufacture of electronic products, is to provide electronic components in the installation and connection of the main support body, all electronic products are not k or lack of basic parts. But the circuit board industry in the production process of pollution is very serious, the need for timely exhaust treatment, the following with the Everest blue editorial take a look at the circuit board organic exhaust treatment method analysis.

The components of the exhaust gases discharged from the production of circuit boards are generally as follows.

Acid exhaust gas, which mainly contains the following components: H2SO4, fog, SO2, HCl, NOX, HCN, etc....

Alkaline exhaust gas, which mainly contains the following components: NH3; and

Organic waste gas, the main components are: benzene, toluene, xylene, formaldehyde and non-methane hydrocarbons.

Leaded exhaust, the main components are: lead fumes.

Circuit board exhaust has a strong irritating smell, the department has a highly toxic, through the respiratory tract into the human body, it is very easy to accumulate in the nervous system and haematopoietic system, thus causing poisoning. Prolonged work in this environment, will bring great health hazards to the staff, and seriously affect the efficiency of the work and the appearance of the product image, direct emissions into the atmosphere will certainly cause serious environmental pollution, must be properly managed before giving emissions.

Line board organic waste gas treatment spray absorption method

Spray absorption method is the use of gas and liquid contact, the pollutants in the gas will be transferred to the liquid, and then the clean gas and the polluted liquid separation, to achieve the purpose of purifying the air. The waste gas passes through the filled spray tower and is treated by the gas-liquid reverse absorption method, i.e. the liquid is sprayed down in mist (or small droplets) from the top of the tower downwards. The exhaust gas is sprayed down from the top of the tower in the form of mist (or small droplets), while the exhaust gas is sprayed from the tower body (reverse flow) to achieve the purpose of gas-liquid contact, this treatment can cool the exhaust gas, remove particles and purify the gas.

Shower tower is also known as water washing tower, washing tower, purification tower. According to the type of waste gas and spray liquid can be divided into water spray tower, acid spray tower, alkali spray tower, oil spray tower, water film dust collector / wet dust collector; according to the shape can also be divided into vertical scrubber tower, horizontal scrubber tower; according to the material is divided into PP scrubber tower, glass fibre reinforced plastic scrubber tower and so on.

Line board organic waste gas treatment activated carbon adsorption method

Adsorption method is the use of porous solid adsorbent water samples in one or several components adsorbed on the surface, and then appropriate solvents, heating or blowing and other methods of guessing the component desorption, to achieve the purpose of separation and enrichment. Activated carbon in adsorbent has adsorption function for benzene, toluene, xylene, ethanol, ether and other substances.

Activated carbon adsorption device can adsorb and recover VOCs exhaust gas from organic solvents such as benzene, alcohol, ketone, ester, etc. It is suitable for the treatment of exhaust gas with small air volume and high concentration, and the method can be used in printed circuit boards, electronic parts, semiconductor system manufacturing, spraying, food processing, chemical industry, leather tanning, latex products, paper making and other industries.

Line board organic waste gas treatment catalytic combustion method

Catalytic combustion method with the help of a catalyst to make organic waste gas at a lower ignition temperature for flameless combustion, so that organic waste gas decomposition into non-toxic CO2 and H2O.

Catalytic combustion equipment electrical control system consists of PLC controller, text display, frequency converter, igniter, ultraviolet sensors, thermocouples and other electronic control equipment, as well as the fan, in addition to the zero-pressure valve to regulate the ratio of gas and air. The process is to use catalyst as intermediate to make organic gas into harmless water and carbon dioxide at lower temperature.