Method for jointly gasifying coal and heavy oil for preparing synthesis gas

Abstract

The invention discloses a method for jointly gasifying coal and heavy oil for preparing synthesis gas. The method includes steps of firstly, storing and delivering the heavy oil and preparing and delivering coal slurry; secondly, gasifying the coal and the heavy oil at the high temperatures; thirdly, cooling high-temperature crude synthesis gas and molten ash residues; fourthly, purifying the crude synthesis gas; fifthly, collecting and discharging crude residues; sixthly, treating ash water. The method has the advantages that the method includes the simple steps and is reasonable in design and convenient to implement, and good use effects can be realized; reaction is carried out on the heavy oil and the coal slurry in a gasification reactor for preparing the synthesis gas, accordingly, the effective synthesis gas yield and the utilization rate can be increased, the energy efficiency can be improved, and energy consumption and the production cost can be reduced; the heavy oil can be efficiently and economically utilized, the problem of high raw material consumption due to the fact that existing synthesis gas is prepared from pure coal by means of gasification can be solved by the aid of the method, and the method is high in practicality.

Description

technical field [0001] The invention belongs to the technical field of co-gasification of coal and heavy oil to produce synthesis gas, in particular to a method for co-gasification of coal and heavy oil to produce synthesis gas. Background technique [0002] my country's oil resources are relatively scarce, and the content of heavy oil components is high, so the deep processing and efficient utilization of oil resources have become a major issue in the development of oil refining and petrochemical industries. In the process of crude oil deep processing, the residual oil produced by distillation of crude oil accounts for more than 1 / 3 of the crude oil, and the residual oil must be further processed to produce oil products and chemicals. When residual oil is catalytically cracked to produce olefins, the by-product of cracked heavy oil is mostly sold as a product by enterprises. Due to the high consumption tax of heavy oil, the by-product of cracked heavy oil has been in a stat...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for producing synthesis gas by co-gasification of coal and heavy oil, which has simple steps, reasonable design, convenient implementation, good use effect, and effective synthesis gas. Increased output and energy efficiency utilization rate, reduced energy consumption and production cost, not only solved the problem of high-efficiency and economical utilization of heavy oil, but also solved the problem of large raw material consumption of pure coal gasification to produce syngas, with strong practicability

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