摘要:
A method of capturing carbon dioxide emitted by a power plant includes providing a reactor vessel having a shell with a top and a bottom, introducing an exhaust gas stream into the reactor vessel, the exhaust gas stream containing carbon dioxide, whereby the exhaust gas stream rises toward the top of the reactor vessel. The method includes introducing an organic sorbent solution into the reactor vessel near the top of the reactor vessel so that the organic sorbent solution falls toward the bottom of the reactor vessel, mixing the rising exhaust gas stream with the falling organic sorbent solution to precipitate calcium carbonate, and removing the calcium carbonate from the bottom of the reactor vessel, whereby the calcium carbonate includes the carbon dioxide from the exhaust gas stream.
摘要:
A treatment method for stabilizing at least a portion of at least one heavy metal contained in a sodic fly ash to reduce leachability, wherein the sodic fly ash is provided by a process whereby a sodium-based sorbent is injected in a combustion flue gas to remove pollutants therefrom. The treatment method comprises contacting the sodic fly ash with at least one water-soluble source of silicate and at least one additive comprising calcium and/or magnesium. The material obtained from the contacting step is preferably dried. The additive may be selected from the group consisting of lime kiln dust, fine limestone, quicklime, hydrated lime, dolomitic lime, dolomite, selectively calcined dolomite, hydrated dolomite, magnesium hydroxide, magnesium carbonate, magnesium oxide, and any mixture thereof. A particularly preferred additive comprises lime kiln dust and/or dolomitic lime. The heavy metal to be stabilized in the sodic fly ash may comprise selenium and/or arsenic.
摘要:
A CO2 removal device includes: a CO2 capturing material which captures H2O and CO2 in a gas; a reaction container which contains the CO2 capturing material; an H2O measuring unit for measuring the concentration of H2O in the gas; an H2O concentration adjustment device which adjusts the concentration of H2O on the basis of information obtained by the H2O measuring unit; a gas introduction path introducing the gas into the reaction container from the H2O concentration adjustment device and bringing the gas into contact with the CO2 capturing material; a first gas discharge path discharging the gas from the reaction container after the gas has been brought into contact with the CO2 capturing material; and a second gas discharge path discharging the gas that has been desorbed from the CO2 capturing material from the reaction container. The CO2 removal device allows for the reduction of energy consumption in removing CO2.
摘要:
Provided is a high-concentration carbonyl sulfide conversion-absorption type desulfurizer for use at medium-low temperature and preparation method thereof. The desulfurizer comprises 50%-75% magnetic iron oxide red (Fe21.333O32), 5%-10% alkali metal oxide (K2O), 5-35% anatase TiO2, and 5-10% shaping binder. The method of preparing the desulfurizer comprises: uniformly mixing a metatitanic acid prepared using ferrous sulfate recycled as a by-product from titanium dioxide production with K2CO3, calcining to activate at 500° C.-700° C., mixing with the magnetic iron oxide red and binder, roll molding at room temperature to form balls which are dried at 100° C.-150° C. to obtain the desulfurizer. The desulfurizer has a hydrolysis conversion of carbonyl sulfide higher than 99%, and has a higher sulfur capacity more than 25%.
摘要翻译:提供了用于中低温的高浓度硫化羰转化吸收型脱硫剂及其制备方法。 脱硫剂包括50%-75%的磁性氧化铁红(Fe21.333O32),5%-10%的碱金属氧化物(K2O),5-35%的锐钛型TiO 2和5-10%的成型粘合剂。 制备脱硫剂的方法包括:将以二氧化钛生产的副产物再循环的硫酸亚铁制备的偏钛酸与K 2 CO 3均匀混合,煅烧以在500℃-700℃下活化,与磁性氧化铁 红色和粘合剂,在室温下成型,形成在100℃-150℃下干燥以获得脱硫剂的球。 脱硫剂具有高于99%的羰基硫化物的水解转化率,硫含量高于25%。
摘要:
A method for cleaning bypass gases of the cement or mineral industry includes cooling down a removed bypass gas from a cement or mineral processing plant to a temperature of between 500° C. and 150° C., and coarsely dedusting the bypass gas, the dust burden being reduced by 30 to 95%. After the dedusting step, the gaseous constituents contained in the partly dedusted bypass gas are reduced in a reducing step. The partly dedusted bypass gas is further finely dedusted. The gaseous constituents reducing step includes at least a catalytic reduction of one or more of nitrogen oxides, hydrocarbons, and carbon monoxide.
摘要:
Provided are: an NOx removal unit to remove nitrogen oxide; an air preheater on a downstream side of the NOx removal unit to recover heat; a precipitator on a downstream side of the air preheater to remove ash dust; a gas-liquid contact type desulfurization unit on a downstream side of the precipitator to remove sulfur oxide; an SO3 removing agent supply unit to supply an SO3 removing agent at a supply unit on an upstream side of the precipitator; and a wet state processing unit between the air preheater and the supply unit to supply water to a flue gas to be made into a wet state; the wet state processing unit having a stand-up portion, a partition unit and a droplet supply unit.
摘要翻译:提供:除去氮氧化物的NOx去除单元; 在NOx去除单元的下游侧的空气预热器,用于回收热量; 在空气预热器的下游侧具有除尘器以除灰尘; 在除尘器的下游侧的气液接触型脱硫单元,以除去硫氧化物; SO 3去除剂供给单元,其在所述除尘器的上游侧的供给单元供给SO 3除去剂; 以及空气预热器和供给单元之间的湿态处理单元,用于向待制成湿态的烟道气供水; 湿状态处理单元具有支撑部分,分隔单元和液滴供应单元。
摘要:
An integrated sorbent injection, heat recovery, and flue gas desulfurization system is disclosed. A dry sorbent is injected into the flue gas upstream of the air heater. This reduces the acid dew point temperature, permitting additional heat energy to be captured when the flue gas passes through the air heater. The flue gas then passes through a desulfurization unit and through a baghouse, where solids are captured. The capture of additional heat energy permits the overall boiler efficiency to be increased while safely operating at a lower flue gas temperature. The integrated system consumes no greater quantity of sorbent than conventional methods but provides the benefit of improved plant heat rate.
摘要:
A method and system for processing an input fuel gas and steam to produce separate CO2 and output fuel gas streams. The method comprises the steps of using a decarboniser segment for reacting at least a solid sorbent reacts with the fuel gas and steam to remove carbon from the input fuel gas and to produce the output fuel gas stream in an exhaust gas from the decarboniser; using a calciner segment for reacting the solid sorbent from the decarboniser segment therein to release the CO2 into the CO2 gas stream; wherein CO2 partial pressures and temperatures in the decarboniser and calciner segments respectively are controlled such that the temperature in the decarboniser segment is higher than the temperature in the calciner.
摘要:
Impurities in exhaust gas from oxyfuel combustor are removed using simple equipment to reduce installation cost. Compressor-based impurity removal system for compressing exhaust gas mainly composed of carbon dioxide from combustor before supply to carbon dioxide liquefier for removal of impurities in exhaust gas has impurity separators with compressors for compressing exhaust gas from combustor stepwisely to target pressure for liquefaction of carbon dioxide and with aftercoolers for cooling exhaust gas compressed by compressors, water condensed by cooling being discharged as drain, and alkaline agent supply unit for supplying alkaline agent to at least upstream side of aftercooler in first impurity separator. Impurities in exhaust gas are discharged through drain including alkaline agent.
摘要:
Provided are impurity separators which have compressors for supplying exhaust gas comprising carbon dioxide from oxyfuel combustor to target pressure stepwisely before supply to carbon dioxide liquefier and have aftercoolers for cooling exhaust gas compressed by the compressors stepwisely to target pressure, water condensed by cooling being discharged as drain; alkaline agent supply unit which supplies alkaline agent to upstream side of aftercooler in last impurity separator to discharge drain containing alkaline agent having removed impurities in exhaust gas from aftercooler in last impurity separator; and circulation line for supplying of drain from aftercooler in last impurity separator to upstream side of aftercooler in first impurity separator.