How to Choosing the Right Material for Your Pyrolysis Unit?

The material used for a pyrolysis unit is a crucial factor in determining its performance, safety, and how long it will last. The unit must be able to handle extreme heat, resist corrosive elements, and remain structurally sound throughout the pyrolysis process. Opting for the wrong material can lead to frequent breakdowns, escalating repair expenses, and potential safety risks.

DOING pyrolysis unit

When selecting the material for a pyrolysis unit, several key aspects need careful consideration:

Type of Feedstock and Its Properties

The chemical makeup and thermal behavior of different feedstocks significantly influence the choice of unit material:

Standard Feedstocks (Tires, Rubber, Plastics):

Temperature Needs: Typically, the pyrolysis of rubber and plastics occurs at temperatures between 300°C and 450°C.

Corrosion Tendency: These feedstocks generally produce a low level of corrosiveness during pyrolysis.

Recommended Material: Q245R or Q345R boiler plates are a cost-effective solution. These carbon steels provide adequate strength and moderate temperature resistance for these applications.

Semi-Fluid Feedstocks (Oil Sludge, Coal Tar):

Temperature Needs: Pyrolysis temperatures for these materials often range from 300°C to 500°C.

Corrosion Tendency: Due to their complex hydrocarbon compositions, these feedstocks can be moderately to highly corrosive.

Recommended Material: Stainless steel grades such as 304, 316, or 309S are necessary.

DOING pyrolysis plant unit design details

Operating Conditions

Beyond feedstock characteristics, several operational factors impact the material selection:

Temperature Fluctuations: Materials subjected to frequent heating and cooling cycles require superior resistance to thermal shock.

Pressure Demands: Pyrolysis systems operating under high pressure demand materials with greater tensile strength.

Duration of Exposure: Prolonged contact with corrosive environments necessitates the use of more robust materials.

DOING pyrolysis unit manufacturing process

Economic Factors and Lifespan

Initial Outlay: Carbon steels have the lowest upfront cost, followed by stainless steels, with certain advanced materials representing the highest initial investment.

Maintenance Expenses: In corrosive environments, stainless steels generally require less frequent maintenance compared to carbon steels.

Service Life: While carbon steel offers a lower initial price, DOING's composite structure pyrolysis units provide a good balance between cost and performance. The inner stainless steel lining enhances corrosion resistance, thereby extending the unit's operational life. Unlike basic carbon steel units that might only last 1-3 years in challenging conditions, our units can function effectively for over 3-6 years, delivering better long-term economic benefits.

DOING pyrolysis unit details

Selecting the right material for a pyrolysis unit is a critical decision that involves balancing feedstock properties, operational demands, and financial considerations. The DOING Company excels in designing and manufacturing pyrolysis units customized for specific operational needs. Our technical experts can assist you in evaluating:

    Your specific feedstock characteristics.

    The temperature and pressure profiles of your process.

    The potential for corrosion based on your feedstock's composition.

    A long-term cost-benefit analysis of different material choices.

DOING Company's pyrolysis units feature a composite construction using Q245/345R boiler steel plates combined with stainless steel, with thicknesses ranging from 14 to 18 millimeters. The main body of the unit is constructed from Q245/345R boiler steel plates, offering excellent strength and stability to withstand high-temperature and high-pressure pyrolysis processes. The interior lining is made from stainless steel materials like 304/309S, providing robust resistance to corrosion and oxidation, effectively preventing coking and degradation caused by feedstocks such as sludge and rubber. This composite design not only ensures the unit's durability but also minimizes the likelihood of equipment failures and reduces maintenance expenses.

DOING pyrolysis unit manufacturer

For a reliable manufacturer of high-quality pyrolysis units, the DOING Company is your trusted partner. Reach out to us today to explore our pyrolysis unit materials and to develop a customized solution that meets your unique pyrolysis application requirements.