Water coke slurry for gasification and preparation method thereof

Abstract

The invention relates to water-coke slurry and the preparation method, in particular to a water-coke slurry for gasification with refinery coke as the material and the preparation method, which is characterized in that: the material compositions (mass percentages) are refinery coke of 60 to 80%, dispersing agent of 0.5 to 5% and water of 20 to 39.5%; the steps of the preparation method are as follows: the refinery coke is first broken up to less than 5mm, and then the broken refinery coke is divided into two parts, and the two parts are respectively grinded together with quantitative dispersing agent and water in two grinders; by adjusting the stick-coke ratio of two grinders, the water-coke slurries output from the two grinders have different granularity distributions, and the two water-coke slurries are mixed to obtain the water-coke slurry for gasification; when the viscosity is about 1000mPas, the concentration of the refinery coke in the water-coke slurry can be increased to 72%. The water-coke slurry has the advantages of legitimately utilizing the lignin-sulphonate industrial waste and changing waste into valuable, as well as preparing high-quality water-coke slurry for gasification, and having good fluidity and stability.

Description

Technical field: [0001] The present invention mainly relates to a water coke slurry and a preparation method thereof, in particular to a gasification water coke slurry using petroleum coke as a raw material and a preparation method thereof. Background technique: [0002] Petroleum coke is the product of delayed coking of various residual oil and heavy oil. At present, petroleum coke is mainly used as fuel in cement industry kilns, ordinary boilers and circulating fluidized beds. With the heaviness and deterioration of crude oil, petroleum coke, as the final product of petroleum refining, has greatly increased its output. How to rationally use petroleum coke, especially high-sulfur petroleum coke, has become an urgent problem to be solved. [0003] Use petroleum coke as raw material to produce synthesis gas (CO+H 2 ) Is an effective way to utilize petroleum coke, and the proportion of petroleum coke as a raw material for gasification is increasing. Studies have shown that in the n...

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Problems solved by technology

JP 57168995 has reported a method for preparing water coke slurry using an ether-based dispersant, but the preparation of the dispersant is complicated and the cost is high

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