What do Cokers do?

A coker or coker unit is an oil refinery processing unit that converts the residual oil from the vacuum distillation column into low molecular weight hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum coke.

How is coke removed from coke drum?

The leftover material is called coke and is physically similar to charcoal. This coke will build up in the drum and once full, the drum must be taken offline and the coke is removed using high pressure water cutters for either reclamation or storage.

What is coking of crude oil?

Coking is a refinery unit operation that upgrades material called bottoms from the atmospheric or vacuum distillation column into higher-value products and, as the name implies, produces petroleum coke—a coal-like material.

Why is it called delayed coking?

The coking takes place in the insulated coke drum as the drum fills up for a period of 16–18 h. … All of the heat necessary for coking is provided in the heater, whereas coking takes place in the coke drum; hence, the process is called “delayed coking.”

What is needle coke?

Needle coke is a specialty grade of pet coke valued for its crystalline structure that makes it a good material for making electrodes. Needle coke is typically produced from a dedicated coker that uses low-sulfur FCC slurry as feedstock.

What is coke in the refining process?

Petroleum coke, or petcoke, is a product produced from all types of oil (light/heavy crudes) during the oil refining process. Many different products are extracted from a barrel of crude oil in addition to gasoline, diesel and jet fuels.

Is Delayed coking expensive?

The disadvantages of delayed coking are that it is a thermal cracking process, and it is a more expensive process than solvent deasphalting (see Chapter 6), although still less expensive than other conversion processes for heavier crude oil.

What causes coking?

Coking occurs because the temperature and the oil residue time are higher than the oil stability limitations. Coke formation increases dramatically as local metal contact temperatures exceed 300°C. … Obstructions to flow or directional changes cause reduction in flow rate and increases in oil residence time.

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What is cracking and coking?

Thermal cracking is the cracking of heavy residues under severe thermal conditions. … Coking is the process of carbon rejection from the heavy residues producing lighter components lower in sulfur, since most of the sulfur is retained in the coke.

What is a DCU unit?

Overview of Delayed Coker Unit (DCU) A Delayed Coker Unit is a type of coker that utilizes multiple pairs of drums working in tandem, sometimes as many as eight at a time, to recover specific elements from feedstock residues, tar pitch, and residual oils.

Who makes Coker tires?

• Coker Tire Company is a Chattanooga , Tennessee-based company that manufactures and sells vintage-style Michelin, Firestone, BF Goodrich and Uniroyal bias-ply and radial whitewall tires for collector automobiles.

What is a delayed coker?

• A delayed coker is a type of coker whose process consists of heating a residual oil feed to its thermal cracking temperature in a furnace with multiple parallel passes.

What is coker unit?

• A coker or coker unit is an oil refinery processing unit that converts the residual oil from the vacuum distillation column or the atmospheric distillation column into low molecular weight hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum coke.