Multistage Centrifugal Blowers for Chemical Apps

Product Announcement from Hoffman-Lamson

Multistage Centrifugal Blowers for Chemical Apps-Image


Oil or gas is continually injected into a high temperature furnace where it decomposes into carbon black, which is used for tires, rubber products and pigments in inks, coatings and plastic. .


Hoffman and Lamson combustion blowers help the production process of carbon black by introducing hydrocarbon fuels, such as oil or gas with high temperatures of 1,320 to 1,540 ?C (2,400 to 2,800 ?F). 90% of the processes in the United States are "Oil Furnace Process" and 10% are "Thermal Process". The Thermal Process uses natural gas only, whereas the Oil Furnace Process uses oil as a feedstock and natural gas as a heat source.

An aromatic hydrocarbon feedstock is heated and continually injected into the combustion zone of a gas fired, brick-lined furnace. The oil is decomposed and forms carbon black. Quench water is introduced to the gases to stop the cracking process. Now at 500 ?C (1,000 ?F), the gases and carbon particles pass through heat exchangers and direct water spray to further reduce the temperature to 230 ?C (450 ?F). Bag filters separate the carbon black from the exhaust gases.

The carbon particles are pulverized and pelletized and conveyed to bulk storage for transport.

Hoffman™ and Lamson™ Products

The Hoffman or Lamson multistage centrifugal blower creates a high volume of air at a high pressure to provide forced air through the combustion process. Measured amounts of natural gas are injected into the blower's airflow. The large volumes of air and increased pressures greatly enhance combustion efficiency necessary for the decomposition to occur. Also, the airflow carries the carbon particulate and exhaust gases through the quench tower and into the bag filters.

The airflow is usually 5 - 6,000 cfm (8,500 - 10,200 m3/h) with many plants sized at 12,000 scfm (20,300 m3/h) and up. The pressure is usually around 12 psig (.83 barg). Blowers are operated at or near full load at all times. Typically, there are one or two blowers per reactor.