Process for sluicing residues from the pressure system of a pressure gasification tank

US4381924A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Volkmar Schmidt · Oberhausen, DE
• Bernhard Lieder · Bottrop, DE
• Heinrich Scheve · Oberhausen, DE
• Hans Dohren · Guldental, DE

Key dates

• Filing date: Mar 20, 1981
• Grant date: May 3, 1983
• Expiry date: Mar 20, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S48/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An improvement in a process for periodically sluicing residues which are produced when gasifying ash-containing fuels with oxygen or an oxygen-containing composition under a pressure of 10 to 200 bars wherein ash is granulated in a water bath connected to a gasification chamber, suspended in water and passed into a non-pressurized collecting vessel provided with a conveyor is described. The improvement comprises: PA0 a. discharging the residue from said water bath which is maintained in fluid communication with said gasification chamber via a lock vessel, said lock vessel being connected to a surge tank which contains water so that the lock vessel remains constantly filled with water; PA0 b. equalizing the pressure between said lock vessel and said gasification chamber including said water bath by opening a connection to a process water feed line for said water bath and admitting water therein; PA0 c. depressurizing said lock vessel and removing liberated gases (previously dissolved in the water) and steam therefrom by opening a connection between said lock vessel and said surge tank; PA0 d. discharging suspended and granulated residues from said lock vessel into a collecting vesse…