Scraping plate filtering device applied to high-temperature coal tar purification system, purification system and purification process

Abstract

The invention discloses a scraping plate filtering device applied to a high-temperature coal tar purification system, a purification system and a purification process. According to the scheme, the process comprises the steps that high-temperature coal tar is firstly fed into a filtering cylinder through an inlet of a scraping plate filter, wherein solid impurities in the coal tar are intercepted on the inner surface of a filter element, and the filtered coal tar partially enters into a cleaning tank and is discharged from a coal tar discharge pipe partially; when a filter medium needs to be cleaned, a scraping plate moves constantly up and down to scrape the solid impurities deposited on the surface of a medium; when the impurities are separated from a filter screen, a cleaning disc feeds dirt into a slag collecting chamber in the bottom of a housing, and the dirt is finally discharged from a slag out so as to clean the filter element; and after a long period of time of operation, the filter element is reversely cleaned, so that the impurities which cannot be scraped on the inner surface of the filter element are conveniently cleaned. The scraping plate technology has a closed process for filtration and directly performs filtration without adding filter aids, and the scraping plate filtering device is high in corrosion resistance and high in filtering precision and has the remarkable advantages of being suitable for high-high viscosity fluids, low in energy consumption and the like.

Description

technical field [0001] The invention relates to high-temperature coal tar purification technology, in particular to a scraper filter device applicable to a high-temperature coal tar purification system, a purification system using the scraper filter device, and a purification process. Background technique [0002] Coal tar, also known as coal paste, coal distillate, and coal tar solution, is a by-product of the high-temperature carbonization process of coal, accounting for about 3%-4% of the furnace coal. Coal tar is a black viscous liquid with a special odor and a relative density of 1.02-1.23g / cm3. It has tens of thousands of components, mainly aromatics such as benzene, toluene, xylene, naphthalene, anthracene, and organic compounds such as aromatic oxygen-containing, nitrogen-containing, and sulfur-containing compounds; An important raw material for high temperature materials. Mainly divided into: low-temperature coal tar (450-550 ° C), medium-temperature coal tar (600...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the existing coal tar purification technology, the present invention provides a scraper filter device applied to the high temperature coal tar purification system

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