Method of producing fuel oil by coal tar hydrogenation modifying

Abstract

The present invention relates to a method for producing fuel oil by utilizing coal tar. It is characterized by that said method includes the following steps: after the whole coal tar in which the moisture and ash are removed and diluting oil are mixed according to a certain mixing ratio, making the obtained mixture be successively passed through a shallow hydrogenation unit with hydrogenation protecting agent and prehydrogenation catalyst and a deep hydrogenation unit with main hydrogenation catalyst, then making the product obtained after deep hydrogenation undergo the processes of high-pressure separation, low-pressure separation and fractionation so as to obtain light-oil fraction, medium-oil fraction and tail-oil fraction, namely obtain low-sulfur low-nitrogen fuel oil and light oil product.

Description

1. Technical Field:

[0001] The invention belongs to the field of fuel chemical industry, and specifically relates to a method for producing fuel oil by hydrogenation and upgrading of coal tar. 2. Background technology:

[0002] Coal tar is a by-product of coking, coal chemical and coal gasification industries. In recent years, my country's mechanical coke output has grown rapidly, and the total output in 2003 has reached 138.79 million tons (National Bureau of Statistics Express, coke output is only the output of enterprises above designated size). If the coal tar production rate is calculated on the basis of 3% to 4% of coking coal into the furnace, the annual output of coal tar will reach 5.6-7 million tons. In the next few years, China's local coke production will be completely cancelled. Based on the analysis of the world's coke trade, my country's mechanical coke production will increase year by year. The steady growth of mechanical coke will produce a large amount of coal t...