Boiler containing denitrator

Patent · Tue Jul 10 04:00:00 EDT 1979

OSTI ID:5597320

Inaba, H; Tatsumi, T; Iwai, C

A boiler is described that has a plurality of heat exchanger stages such as a superheater, an evaporator and a preheater, disposed in a combustion gas channel between heat exchangers including an optimum catalytic reaction temperature region are a denitration catalyst layer crossing said channel and a reductant feeding device for adding a reductant such as ammonia gas at a point a little short of catalyst layer. The denitration catalyst layer comprises a number of plate-like catalyst bodies whose plate surfaces extend along the direction of flow of gas, and desirably it is honey-comb-shaped. If the boiler is a waste heat boiler, the denitration catalyst layer will be disposed between the superheater and the evaporator.

• Assignee: Hitachi Shipbuilding and Engineering Co. Ltd.
• Patent Number(s): US 4160805
• OSTI ID: 5597320
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR POLLUTION ABATEMENT
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
DENITRIFICATION
DESIGN
GASEOUS WASTES
HEAT EXCHANGERS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
WASTE HEAT BOILERS
WASTES