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Title:
WASTE GAS HEAT RECOVERY SYSTEM FOR PULP MILL WASTEWATER-BURNING BOILER
Document Type and Number:
Japanese Patent JPS58123022
Kind Code:
A
Abstract:

PURPOSE: To effectively recover even low temperature-waste gas by providing a regenerative rotary type air preheater having a soot blower on its air side pathway side on the downstream side of an electric dust collector.

CONSTITUTION: Pulp wastewater B previously concentrated to a high concentration is sent out under pressure by a positive blower 1 in a boiler 3, heated by a steam type air preheater 2, and then burned with combustion air A supplied. The combustion gas G is heat-exchanged with supplied water W in a fuel economizer 5 and discharged through an electric dust collector 6 and an inductive blower 7 to the open air through a stack 8. In this case, a gas type air preheater 10 is provided on the downstream side of the inductive blower 7, by which the temperature of high-temperature waste gas at the outlet of fuel economizer 5 is cooled to about 120°C for heat recovery. As the preheater 10, a regenerative rotary type air preheater is used, having soot blowers 101a and 101b in its air side pathway to enable steam or compressed air to be blown out.


Inventors:
YAMAKAWA HIDEKAZU
SHIOMI TOSHIO
Application Number:
JP330482A
Publication Date:
July 22, 1983
Filing Date:
January 14, 1982
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F22B31/08; F23L15/02; F28D19/04; F28G1/16; (IPC1-7): F22B31/00; F23L15/00; F28D19/04; F28G1/16
Domestic Patent References:
JP42023313A
JPS53105604A1978-09-13
JPS558510A1980-01-22
Attorney, Agent or Firm:
Kimura Masami



 
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