Does waste oil sludge need to be dehydrated before pyrolysis?

Does waste oil sludge need to be dehydrated before pyrolysis? Of course, the answer is yes. Water has a high specific heat capacity, meaning it requires a significant amount of energy to heat and vapor. If the waste oil sludge has the high water content, during the pyrolysis process, there will be some problems.

Oil sludge with high water content

On the one hand, we need to increase the heating time to lower the water content to 2-3%, which will consume lots of heating energy to increase the operation costs. On the other hand, if the waste oil sludge has the high water content, during the pyrolysis process, there will produce lots of water vapor, which not only will affect the pyrolysis efficiency and final product quality, but also will increase the operation risk and affect the overall equipment quality. So before pyrolysis, we need to dehydrate the waste oil sludge.

Removing water from the sludge before pyrolysis reduces the energy needed to reach the required pyrolysis temperatures, making the process more energy-efficient. Drier sludge heats up more quickly, accelerating the pyrolysis process and improving throughput. After drying the oil sludge, you can get a faster process and get a high quality final products.

DOING oil sludge pyrolysis machine work site

Then let us have a brief introduction about the work flow of the oil sludge pyrolysis machine:

1. Dehydrating: Dehydration can be done by centrifuge, filter press, flash tower, drying drum, etc. The choice of dehydration method should also refer to the key parameters of the waste oil sludge.

2. Feeding: Load the dehydrated oil sludge into the pyrolysis reactor.

Work flow of DOING oil sludge pyrolysis machine

3. Heating: Heat the oil sludge to temperatures typically ranging from 400°C to 600°C in an anaerobic atmosphere. The organic components decompose into oil gas.

4. Cooling: Cool the oil gas with the cooling system to get liquid fuel oil. And the uncondensable gas will be transported to heat pyrolysis reactor directly after purifying.

The final obtained fuel oil is a kind of heavy oil, which can be used in cement factories, steel factories, brick factories, boiler heating or be refined into diesel oil; the obtained solid carbon black can make further processing with the briquetting machine or refining machine to enlarge applications.

Applications of fuel oil from oil sludge pyrolysis machine

Over the past several years, DOING has cooperated with many customers on waste oil sludge pyrolysis machines and the work performance of our equipment won the praise of our customers. For different types of oil sludge, DOING can provide different types of oil sludge pyrolysis machines for you: batch type, semi-continuous type and fully continuous type, which have different designs and advantages to meet your requirements.

DOING oil sludge pyrolysis machine for sale

In a word, dehydrating waste oil sludge before pyrolysis is crucial for improving energy efficiency, process stability, product quality, and equipment longevity. By removing excess water, the pyrolysis process becomes more efficient and effective, leading to better outcomes and reduced operational costs. If you also have abundant waste oil sludge to be recycled, just feel free to contact DOING and send your oil sludge specific parameters, such as oil content, water content, etc. And our sales manager will provide a customization scheme based on your situation.