The HCl emission before and after the precipitator of pulverized coal boiler in a power plant has been measured

and dechlorination test in combustion on flucdized bed of a municipal solid waste（MSW） incinarator and a chaingrate stocker being carried out. Results of study show that: （1） the chlorine contained wastes are the main source of HCl emission from MSW incinerator; （2） the concentration and rate of chloride emission from fluidized bed are lower

the chlorine fixation effect of single lime base absorbents is obviously better than that in chaingrate stocker

the kinds and adding quantity of dechlorination agents have a certain influence upon dechlorination effectiveness; （3） the temperature of combustion is higher and the fuel retaining time is longer in industrial chaingrate stocker

hence hightemperature resisting d

echlorination agents must be used in combustion dechlorination to solve the redecomposition problem of dechlorination product CaCl

2

; （4） for industrial chaingrate stocker

a twostage dechlorination method of semipremixing and semiinjecting the dechlor ination agents can make the retaining time of dechlorination products in the furnace to be greatly shortened

lowering effectively the decomposition rate of dechlorination products

hence obtaining better effectivenecs of dechlorination.