Pressure charging and relieving filtering system and method of high-temperature variable-pressure equipment for solid inlet and outlet materials

Abstract

The invention discloses a pressure charging and relieving filtering system and method of high-temperature variable-pressure equipment for solid inlet and outlet materials. The system comprises a cartridge filter and a lock hopper, wherein an inert gas inlet pipe is connected with the top part and the bottom part of the cartridge filter respectively, a sequencing valve C and a current-limiting pore plate are arranged on a pipeline b connecting the bottom of the cartridge filter, the inert gas inlet pipe connecting the top part of the cartridge filter is divided into a pipeline a and a pipeline c, a sequencing valve A is arranged on the pipeline a, the pipeline c is connected with the upper part of the cartridge filter, the pipeline a is combined with an outlet pipeline d at the top part of the cartridge filter, a sequencing valve B is arranged on the combined pipeline e, the pipeline b is combined with a pipeline f between the lock hopper and the cartridge filter, and a finned pipe is arranged on the pipeline f. The filtering method comprises the steps that effluent gas of the lock hopper is mixed with inert gas after being subjected to heat dissipation through the finned pipe, and then the mixed gas enters the cartridge filter. The method integrates a fin radiating method and a blending cooling method to realize the filtering operation of the effluent gas, with high temperature and periodically varied pressure, from the lock hopper.

Description

technical field [0001] The invention relates to the field of slag and ash discharge in the coal gas chemical industry, and furthermore, relates to a charging and releasing pressure filtering system and a filtering method of a high-temperature pressure-transforming equipment for feeding and discharging solids. Background technique [0002] For the coal gasification process of solid slag and ash discharge, lock bucket facilities are used to realize the discharge of slag and ash, and finally discharge to the environment. The gas discharged during the lock bucket depressurization process contains solid particles and cannot be discharged directly to the external environment. Certain measures need to be taken to separate the solid particles in the discharged gas before discharging. Due to the high temperature of the slag or ash leaving the gasifier, some technologies can reach as high as 800°C. Conventional filtration facilities cannot adapt to the high temperature and periodic pr...

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Problems solved by technology

This method increases water consumption, and the process of black water treatment is not only complicated, but also requires high investment

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