Removal of undesired gaseous components from hot waste gases

Patent · Tue Oct 13 04:00:00 EDT 1981

OSTI ID:5945932

Haeussinger, P; Linde, G; Schliebener, C

A method is described for removing undesired gaseous components, e.g., SO/sub 2/, from hot combustion gases (From carbonaceous fuels) by scrubbing with a regenerable absorbent. The scrubbing is conducted with a liquid physical absorbent, E.G., dimethylformamide, at a temperature less than 0/sup 0/ C. The cooling requirements of the scrubbing process are supplied by an absorption type refrigeration unit. The hot combustion gases, prior to scrubbing, are cooled in indirect heat exchange, first with air in an upper temperature range cooling zone, and then with cold combustion gas purified by the scrubbing in a lower temperature range cooling zone. The resultant heated air is used in part as (A) air for combustion and in part as (B) an energy source for the operation of the refrigeration unit. A heat pump may be used to supplement the absorption type refrigeration unit. Other aspects include, for example, special regenerator design and absorbent regeneration steps.

• Assignee: Linde Ag (Germany, Federal Republic of)
• Patent Number(s): US 4294590
• OSTI ID: 5945932
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
02 PETROLEUM
020800 -- Petroleum-- Waste Management
03 NATURAL GAS
030700 -- Natural Gas-- Waste Management
AIR POLLUTION CONTROL
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
HEAT PUMPS
POLLUTION CONTROL
SCRUBBING
SEPARATION PROCESSES
WASTES