Equipment and process for producing light tar by controlling QI (Quality Index) value of tar

Abstract

The invention relates to equipment and a process for producing light tar by controlling the primary QI (Quality Index) value of tar. The process comprises the following steps of: making coal gas which is primarily cooled by using a primary cooler and a condensate produced in the electric catching tar removing process of an electric tar catching device flow into a condensate groove through a water seal; conveying one path of condensate in the condensate groove to the upper and lower sections of the primary cooler by using a condensate pump for spraying; conveying the other path of condensate to a light tar separating groove; feeding the condensate from a position which is a half of the height of one side of the separating groove; making a supernate over three quarters of the height of the separating groove overflow; separating primary low-QI-value light coal tar and ammonia water out with a plug flow standing method for continuously standing and separating light tar according to the specific weight difference between light tar and water, and a medicament demulsification method for demulsifying and separating a part of emulsifying oil by adding a polyacrylamide demulsifying agent; making ammonia water flow into a mechanical ammonia water tar settling tank; feeding light tar into a light tar storage groove; and processing and treating.

Description

technical field [0001] The invention relates to a material separation method, in particular to a device and a process for producing light tar by controlling the original QI value of tar. Background technique [0002] Tar, also known as coal paste, is a black or dark brown viscous liquid obtained during the dry distillation of coal. It has a special odor, is flammable and corrosive. It is a complex mixture of highly aromatic hydrocarbons. Tar is produced during the coking process of coal, and its output accounts for about 3% to 4% of the furnace coal. Under normal temperature and pressure, its product is a black viscous liquid with a density usually between 0.95 and 1.10g. / cm3 and has a special odor. Tar is also called coal tar. [0003] The properties of each component of tar are different, but there are many components with similar properties. It is necessary to cut various fractions by distillation method, so that the single-component products to be extracted, such a...

AI Technical Summary

Problems solved by technology

[0007] In summary, the traditional method of producing tar cannot process and extract light tar, resulting in a waste of resources. Therefore, developing a process for producing light tar by controlling the original QI value of tar has broad market prospects

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