System for purifying contaminated air

Details System for purifying contaminated air System for purifying contaminated air

1991-10-31

1992-11-10

Favors, Edward G.

Liquid heaters and vaporizers

Plants

Feed water heaters

122149, 236 14, 431 5, F22B 3300

Patent

active

051614880

ABSTRACT:
A steam boiler (2) including a fire tube (21) and convection heating surfaces (22) is preceded by a combustion chamber (30) including a surface burner (34) for high excess air. The combustion chamber (30) and the fire tube (21) are internally thermally insulated (33). The combustion air supply opening (37) of the burner (34) is connected by way of a blower (40) with an exhaust air source (1). A fuel control valve (36) is controlled as a function of the boiler load. A plurality of heat exchangers (47, 48, 49) are incorporated in the flue gas channel (45) following the convection heating surfaces (22). The most upstream heat exchanger (47) is connected on the water inlet side by way of a pump (51) to the water chamber (23) and on the water outlet side by way of a baffle (53) to the water-steam circuit of the boiler (2). With this system it is possible to purify all of the exhaust air from the exhaust air source (1) over a broad boiler (2) load range.

REFERENCES:
patent: 4627388 (1986-12-01), Buice
patent: 4716843 (1988-01-01), Coerper, Jr. et al.
patent: 4890581 (1990-01-01), Natter
patent: 4989549 (1991-02-01), Korenberg

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