How to deal with the waste gas produced by the twin-screw granulator?


During the operation of the twin-screw granulator, some […]

During the operation of the twin-screw granulator, some waste gas may be generated. If the waste gas is not treated, it will have a great impact on the environment and the health of the operators. Then how should these waste gas be treated? It is mainly processed through three processes: activated carbon adsorption, regenerative incineration, and catalytic incineration.

Treatment process of waste gas produced by twin-screw granulator:
1. Activated carbon adsorption method
The primary principle of this method is to use the adsorbability of activated carbon for organic waste gas molecules, so that the organic waste gas molecules are adsorbed on the surface of the activated carbon, and then the purpose of purifying the waste gas is completed; the adsorption method is now mainly used in large air volume, low concentration, no dust, no oil and Water, exhaust gas at room temperature.
2. Regenerative incineration method
The regenerative incineration method is selected, and other fuels or combustion-supporting gases are required to heat the temperature in the furnace or the thermal storage ceramics to above 760 degrees. The use of high temperature decomposition of organic waste gas molecules to convert them into harmless carbon dioxide and water, and then organized discharge; this method has the advantage of high purification power; it can treat high-concentration waste gas.
3. Catalytic incineration
Catalytic incineration generally allocates activated carbon boxes or zeolite molecular sieves; first the activated carbon boxes or zeolite molecular sieves are used to adsorb and concentrate the organic waste gas; after the adsorption is completed, the CO furnace is started and hot air is used to desorb the activated carbon or zeolite; The high-concentration exhaust gas enters the CO furnace and undergoes catalytic decomposition under the action of the precious metal catalyst and high temperature.

Operation control classification of twin-screw granulator:
1. Host temperature control
The temperature requirements of the main engine should be considered as a whole, except for the required twin-screw granulator screw and external heating barrel, the plastic melt is extruded, and the spiral kneaded plastic self-heats, therefore, the heater heating should not be considered only When opening and closing, the elements of cooling hot screws should also be considered.
2. Screw speed control
The twin-screw granulator is an important requirement for scheduling screw speed and stability. The screw speed directly determines the quantity and speed of the product. It is necessary to reach the speed required by the granulator screw speed as much as possible. Because the rotation speed is not the same, the impact kneading quality will be unstable.
3. Diameter control
In order to ensure the diameter of the product, in addition to the need to control the core screw speed and traction equipment, it should also ensure the control of the line speed and outer diameter measurement. The twin-screw granulator should check the outer diameter of the cable at any time, and adjust the traction or screw speed through the response of the error signal, and the correct diameter of the out of tolerance.