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1. (WO2018197282) DEVICE AND METHOD FOR WASTE GAS SCRUBBING AND UREA PLANT HAVING A WASTE GAS SCRUBBER

Pub. No.:    WO/2018/197282    International Application No.:    PCT/EP2018/059829
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Thu Apr 19 01:59:59 CEST 2018
IPC: B01D 53/34
B01D 53/50
B01D 53/56
B01D 53/58
B01D 53/62
B01D 53/68
B01D 53/78
C07C 273/14
Applicants: thyssenkrupp Industrial Solutions AG
THYSSENKRUPP AG
Inventors: GEHRKE, Dr., Helmut
SCHMITZ, Martina
BUSS, Stephan
Title: DEVICE AND METHOD FOR WASTE GAS SCRUBBING AND UREA PLANT HAVING A WASTE GAS SCRUBBER
Abstract:
The present invention relates to a device (1) for removing a gaseous chemical compound from a waste gas, wherein the gaseous chemical compound can be converted into an aqueous liquid phase by means of a reaction with a scrubbing solution (22), the device comprising a channel (5), which has a scrubbing region (12) having n scrubbing stages which are arranged such that a waste gas can be guided along a transport direction (T) from a first scrubbing stage to an nth scrubbing stage, wherein n is at least two. Each individual stage of the n scrubbing stages comprises: - a surface-enlarging structure (3), - a spraying device (2) for spraying the surface-enlarging structure (3) with a solvent (22), - an outflow (35) for collecting a sump solution which has run off the surface-enlarging structure (3), the sump solution containing the scrubbing solution (22), and - a return line (4), which is connected to the outflow (35), for returning a first sub-flow of the sump solution to the spraying device (2) of the same scrubbing stage, wherein, with the exception of the outflow (35) of the first scrubbing stage, the outflow (35) of each individual scrubbing stage is connected to the return line (4) of the directly adjacent scrubbing stage counter to the transport direction (T) via a scrubbing stage connection line (7) for conducting a second sub-flow of the sump solution, and the nth scrubbing stage comprises an inflow (51) for supplying the return line (4) of the nth scrubbing stage with fresh scrubbing solution (22), wherein the outflow (35) of the first scrubbing stage is connected to a measuring device for determining the pH value (56.1) of the second sub-flow of the sump solution and/or to a measuring device for determining the concentration of the scrubbing solution (56.2) in the second sub-flow of the sump solution via a discharge line (52) for conducting a second sub-flow of the sump solution.