摘要:
A flash tank including: a closed interior chamber; a gas exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an inlet nozzle attached to an inlet port of the chamber, wherein the inlet nozzle includes a flow passage, and a movable valve plate in the flow passage, wherein the valve plate has a first position which defines a first throat in the flow passage and a second position which defines a second throat having a smaller cross-sectional area than the first throat.
摘要:
A flash tank including: a closed interior chamber; a gas exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an inlet nozzle attached to an inlet port of the chamber, wherein the inlet nozzle includes a flow passage, and a movable valve plate in the flow passage, wherein the valve plate has a first position which defines a first throat in the flow passage and a second position which defines a second throat having a smaller cross-sectional area than the first throat.
摘要:
A method to produce energy at a pulp mill, including the steps of: combusting pulping process waste liquor in the furnace of a recovery boiler to generate flue gases, recovering the heat from the flue gases by producing saturated and/or partially superheated steam in the recovery boiler, gasifying wood, bark or wood wastes in a gasifier for producing a combustible gas, burning at least part of the combustible gas in a superheating boiler, and superheating the saturated and partially superheated steam in the superheating boiler to produce superheated steam.
摘要:
A process is disclosed in which a waste gas containing sulfur compounds and carbon dioxide from pulp mill is contacted with an aqueous alkali solution derived from green liquor, white liquor or weak white liquor having low pH value and low sodium ion concentration and having been oxidized, whereby the sulfur compounds are absorbed as completely as possible with minimal absorption of carbon dioxide in the waste gas.
摘要:
A chemical absorption system for removing hydrogen chloride from gases resulting from the combustion of magnesium base pulp residual liquor containing sodium chloride.
摘要:
Method and apparatus are provided for tempering exhaust or flue gases emanating from a chemical recovery furnace to maintain the gases at a temperature above the dew point thereby preventing condensation and significantly reducing corrosion. The apparatus of this invention includes a gas fired heating unit which heats up sufficient quantities of air to a temperature in excess of the dew point and directs this heated air into an exhaust duct of the recovery furnace and/or into a dust collection device, such as an electrostatic precipitator, located downstream of the recovery furnace. The introduction of heated air into the system may also be utilized to preheat the duct work and precipitator prior to initial operation of the recovery furnace to avoid condensation in a cold system during start-up.