Coke slurry fuel composition and method of making the same

Abstract

A coke slurry fuel composition of the instant disclosure comprises 40-80 percentage by weight of petroleum coke (dry basis), 20-60 percentage by weight of biological sludge (wet basis), and 1-4 percentage by weight of basic additive. Accordingly, the coke slurry fuel composition with high combustion efficiency can be adapted to reduce emissions of toxic or air pollutants, and the purpose of sludge reduction can also be achieved. A method of making coke slurry fuel composition is further provided.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The instant disclosure relates to fuel technologies; in particular, to a coke slurry fuel composition and method of making the same.[0003]2. Description of Related Art[0004]With the quick development of society and economies in modern society, the world is facing serious shortages of energy. According to statistics, the world oil reserves are, if current consumption levels continue, expected to exhaust within 50 years. The world's total proved coal reserves are expected to exhaust within 100 years. The countries of the world are finding and developing alternative energy. For this reason people start looking for renewable energy.[0005]Petroleum coke (often abbreviated pet coke or petcoke) is a by-product of the oil refining process, resulted from the thermal processing of residual oil, which has been cracked or otherwise processed to remove low boiling fractions. Petroleum coke is a carbon-based material composed of crys...

AI Technical Summary

Benefits of technology

The purpose of this patent is to provide a fuel composition made from coke and sludge, which can reduce the amount of harmful substances in sludges and save energy. The composition can be used as a replacement for conventional solid fuels and reduces the amount of sludge produced and its disposal cost. It also contains a specific additive that reduces sulfur dioxide production, while the quality and purity of the petroleum coke can be maintained without desulfurization. Overall, the technical effect of this patent is to provide a sustainable and cost-effective solution for reducing harmful substances in sludges and saving energy in urban sewer systems.

Problems solved by technology

With the quick development of society and economies in modern society, the world is facing serious shortages of energy.

The sewage sludge production has caused serious impact on the humans and the environment in which we are living.

Taiwan's landfills will be exhausted soon.

However, due to its very high water content, biological sludge cannot be used for direct co-firing with solid fuel.

Biological sludge disposal is a growing worldwide problem.

Biogas can be produced from biological sludge in a landfill, thus polluting the ground water.

The organic fertilizer or soil amendment product made from biological sludge is a risk to human and environmental health because biological sludge contains harmful substances such as pathogenic bacteria, heavy metals, and carcinogenic compounds.

Further, the disposal method of incineration cannot achieve high thermal efficiency due to energy balance problems.

Besides, the lightweight aggregate made from biological sludge cannot meet the market requirements due to the higher production cost and technology.

However, methane gas (CH4) and toxic hydrogen sulfide gas (H2SO4) can be produced in the biological digestion process, and the methane gas will react with the hydrogen sulfide gas to form sulfuric acid when combustion occurs.

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