Technical Application of Honeycomb Activated Carbon in Organic Waste Gas Treatment

1. Strong adsorption capacity

It is widely used in various types of organic waste gas purification systems with low concentration and large air volume. The exhaust gas to be treated can fully contact with activated carbon when passing through the square hole of honeycomb activated carbon, and the adsorption efficiency of various exhaust gases can reach 80%. It can be widely used in the purification treatment of toluene, xylene, benzene, benzene, phenols, lipids , Alcohol aldehydes and other organic gases, malodorous gases and various gases containing trace metals. Environmental protection equipment using honeycomb activated carbon has high waste gas treatment and purification efficiency, small adsorption bed volume, and low equipment energy consumption, which can reduce manufacturing costs and operating costs. The purified gas fully meets environmental protection emission requirements.

2. Low wind resistance

The main reason why honeycomb activated carbon can replace columnar and granular activated carbon *** is its small wind resistance coefficient (can reach 0, 8m / s), which can allow the exhaust gas to enter and exit steadily, without affecting the subsequent exhaust gas discharge volume, which will affect the life of the machine. To the lowest. Has excellent adsorption, desorption performance and gas dynamics performance.

3. Common specifications of honeycomb activated carbon in waste gas treatment

1) Honeycomb activated carbon commonly used in waste gas treatment can be divided into three types according to pore size or number of pores:

Large holes (5mm, 400 holes) have low wind resistance and fast filtering speed

Medium hole (3mm, 625 hole) moderate wind resistance and filtration speed

Small holes (1.5mm, 1600 holes) have the best effect and are commonly used

2) The commonly used honeycomb activated carbon in waste gas treatment can be divided into three types according to size:

100 * 100 * 100mm (*** is commonly used)

100 * 100 * 50mm

50 * 50 * 100mm

3) The honeycomb activated carbon commonly used in waste gas treatment can be divided into two types according to water resistance properties:

Water-resistant honeycomb activated carbon (suitable for processes with high air humidity or water spray in front and no drying device)

Water resistant honeycomb activated carbon (suitable for low air humidity)

4. The most commonly used technical indicators of honeycomb activated carbon in waste gas treatment

1) Iodine value (iodine value) refers to the amount of iodine (in milligrams) adsorbed per gram of activated carbon at 0.1 mol / L as the iodine value, which is an important indicator of adsorption capacity.

2) Specific surface area (surfacearea) refers to the total area per unit mass of material.

3) Carbon tetrachloride (CTC) is usually used as an indicator for adsorbing organic waste gas molecules.

4) benzeneadsorption rate (benzeneadsorptionrate) is usually used as the adsorption capacity of small molecule organic matter.

In summary: different organic waste gas components and concentrations are suitable for different organic waste gas treatment methods. At present, comprehensive technology maturity, economy and equipment maintenance are many factors, but the application of *** is widely used or the honeycomb activated carbon adsorption method.

Note on the use of honeycomb activated carbon:

1. Use honeycomb activated carbon to avoid high temperature as much as possible, because as the temperature rises, the adsorption effect will decline, if it is maintained at 30-50 ℃, it is the best. At the same time, it is necessary to avoid high dust content in the gas, because the tar dust mist will block the pores of the activated carbon, increase the wind resistance, and reduce the adsorption effect. In this case, a dust filter device must be installed in front of the honeycomb activated carbon to improve the efficiency and service life.

2. During high temperature desorption, the temperature should be controlled at 80-120 ℃. If the temperature is too low, the desorption effect is not good, and most substances cannot be desorbed; if the temperature is too high, it is easy to cause flammable and explosive gases in the exhaust gas Reaching the ignition point (such as toluene, etc.) to produce fire or explosion and other accidents; if the honeycomb activated carbon is found to be red, be sure to close all valves to avoid contact with oxygen to oxidize it to ashes.