65results about How to "Improve desulfurization performance" patented technology

The invention relates to a method for highly efficient desulfurization and denitrification of flue gas and materials used. The main material is at least one of 50-99wt% calcium hydroxide, calcium carbonate, magnesium hydroxide, magnesium carbonate, sodium carbonate or sodium bicarbonate, Auxiliary material oxidizing agent: 1-50wt%. 0.1-10wt% binder can also be added. The desulfurization principle of the high-efficiency desulfurization and denitrification material provided by the invention is to oxidize sulfur dioxide into sulfur trioxide and then perform desulfurization reaction to generate calcium sulfate or other sulfate radical compounds. The compound no longer needs secondary treatment and is harmless to the environment, so The method can fundamentally eliminate the discharge of subsequent pollutants from flue gas desulfurization, and is environmentally friendly.

The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mg-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 5-20wt% Mg, 1-15wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02wt%, the rest is Fe. It is smelted from line frequency furnace. The invention has the advantage of easy to use, stable, and could improve the recovery factor of the metal element. The molten steel treated by the deoxidizer has good fluidity, high work rates, high benefits, etc. The deoxidizer could discharge the impurity, and it has good mechanical behavior, good quality, long useful life and good social benefit.

A desulfurization adsorbent for a fuel cell has a structure according to Formula 1 below, and a desulfurizing method uses the desulfurization adsorbent. The desulfurization adsorbent displays remarkably excellent adsorption performance for adsorbing sulfur compounds as well as excellent regeneration performance, compared with conventional desulfurization adsorbents. Thus, the desulfurization adsorbent does not need to be replaced even after prolonged use, thus stabilizing the operation of a fuel cell system and reducing costs.

(M₁)_a-(Si)_x—(Ti)_y-(M₂)_z-O   [Formula 1]

wherein M₁ is at least one selected from alkali metals, alkaline earth metals, hydrogen, ammonium, rare earths, and transition metals; 4≦x/y≦500, 0≦z/y≦3, 0≦a/(y+z)≦1; and M₂ is aluminum (Al), boron (B) or a trivalent metal. The desulfurizastion adsorbent is produced by subjecting a mixture of a silicon source, a titanium source, and optionally, aluminum, boron or a trivalent metal in an alkali solution to a hydrothermal treatment to obtain a crystalline porous molecular sieve.

The invention discloses a biogas desulfurization method in series of a wet method with a dry method, which comprises the following steps: crude gas is boosted by a fan and enters a wet desulphurization tower after the temperature is lowered by a cooling tower; in the countercurrent contact process of crude gas and a desulfurization solution in the tower and a catalyst, most of impurities such as hydrogen sulfide are removed, and then the biogas is subjected to the dry desulfurization again after the moisture is separated through a dehydrating tower to further remove hydrogen sulfide so as to be lowered below 15 mg/Nm<3> to enter a biogas cabinet for use, and a rich fluid containing H2S is recycled in a regeneration tank. The method disclosed by the invention has the advantages of large treatment amount, stable treatment effect, high sulfur recovery rate, easily regenerated desulfurizer and long service life, and ensures that the hydrogen sulfide content of biogas meets the use requirements. The service life of the equipment pipeline in the biogas industrial application can be prolonged, the environmental problem of secondary pollution in use of biogas is eliminated, and a guarantee for further purifying and utilizing biogas is provided.

A method for producing a hydrorefining catalyst has the steps of preparing an impregnation solution containing molybdenum, phosphorus, cobalt and/or nickel, and citric acid, bringing a carrier into contact with the impregnation solution, and then calcinating the carrier in an oxidizing atmosphere at a temperature at which citric acid is removed. In the impregnation solution, a molar ratio of molybdenum/phosphorus is 6 to 13, a molar ratio of (cobalt and nickel)/phosphorus is 0.5 to 7, and a molar ratio of (cobalt and nickel)/citric acid is 0.5 to 2. As for the hydrorefining catalyst obtained by this method, the activity of the catalyst is high, and the catalyst life is long.

The invention discloses a method for preparing a fine desulfurizer with water quenching slag of nickel concentrates, which is characterized by using the water quenching slag of nickel concentrates as the raw material for preparing the fine desulfurizer, using acid to treat the water quenching slag and then adding alkali for neutralization under the condition of introducing air and stirring, mixing the obtained precipitates and binders evenly and preparing the fine desulfurizer by extrusion molding after kneading by adding water. The water quenching slag contains the compounds of Ni, Cu, Zn, Fe and Cr. The method makes good use of the industrial and metallurgical wastes harmful to the environment. The prepared fine desulfurizer has less than 0.1*10-6(v/v) degree of purification toward the feed gases, stable desulfurization effect and low cost, realizes energy conservation and emission reduction, changes wastes into valuables and has obvious economic and social benefits.

The invention relates to the technical field of dry flue gas desulfurizers, particularly to a flue gas desulfurizing agent, a preparation method and application thereof. The flue gas desulfurizing agent comprises the following components in percentage by mass: 25-80% of modified calcium hydroxide, 5-40% of calcium carbonate and the balance of an additive and a binder, wherein the additive is two or three of iron oxide, sodium carbonate and manganese sulfate, the binder is selected from one or more of pseudo-boehmite, bentonite and a dilute nitric acid solution, and the modified calcium hydroxide is surfactant modified calcium hydroxide. According to the invention, the problems that an existing desulfurizing agent is poor in mechanical strength, harsh in temperature application range, low in desulfurizing agent utilization rate and the like after being formed are solved, and the desulfurizing agent provided by the invention does not need to be roasted at high temperature, has high mechanical strength, also has good desulfurizing performance under medium and low temperature conditions, and can be applied to SO2 removal.

The invention relates to a blade abrasion evaluation method of a KR desulfuration paddle agitator. According to the technical scheme, blade abrasion evaluation positions are set in advance, the initial standard outline and the usage limit outline of each blade (4) of an unused KR desulfuration paddle agitator (2) in the corresponding blade abrasion evaluation position are determined respectively, and then the abrasion replacement value W1 and the abrasion repair value W2 of each blade (4) of the KR desulfuration paddle agitator (2) in the using process are determined; then, a series of images of the blades (4) in the rotating process of the KR desulfuration paddle agitator (2) are acquired through a first industrial camera (1) and a second industrial camera (2), the abrasion virtual outline of each blade (4) is calculated according to the series of images to be compared with the corresponding initial standard outline and the corresponding usage limit outline, and the comprehensive abrasion evaluation rate R of each blade (4) is obtained; finally, the abrasion evaluation result is given according to the comprehensive abrasion evaluation rate R, and the abrasion replacement value W1 and the abrasion repair value W2 of each blade (4). The blade abrasion evaluation method of the KR desulfuration paddle agitator has the advantages of being easy to operate, accurate in evaluation and capable of quantizing abrasion.

The invention provides a flue gas desulfurization apparatus includes at least one activated carbon fiber board 20 provided in a catalyst unit 6, the board being formed by alternatingly juxtaposing one or more plate-like activated carbon fiber sheets and one or more corrugated activated carbon fiber sheets so as to provide vertically extending conduits, wherein water for producing sulfuric acid is supplied, through a capillary phenomenon, to the activated carbon fiber board 20 provided in the catalyst unit 6. The flue gas desulfurization apparatus attains removal of sulfur oxides (SOx) by adding a minimum required amount of water to the activated carbon fiber board 20 so as to attain uniform water distribution and can reduce the amount of water required for removing sulfur oxides (SOx).

The invention relates to a desulfurization and desorption system and a use method. The desulfurization analysis system comprises a washing module, a desulfurization module and a desorption module. The washing module comprises a washing tower and a washing tank, the washing tower is communicated with the washing tank, and the washing tank is communicated with the washing tower through a washing circulating pump. The desulfurization module comprises a desulfurization tower and a rich liquor tank, the desulfurization tower comprises an upper alkali washing layer and a lower desulfurization layer, the desulfurization layer is communicated with the water scrubber, the desulfurization layer is communicated with the rich liquor tank through a rich liquor pump, the alkali washing layer is communicated with an alkali liquor tank, and the alkali liquor tank is communicated with the alkali washing layer through an alkali liquor pump. The desorption module comprises a desorption tower and a hot water reboiler, the rich liquor tank is communicated with the desorption tower through a desorption feeding pump, the desorption tower is communicated with the desulfurization layer through a barren liquor pump, and the hot water reboiler is arranged at the outer bottom end of the desorption tower and is communicated with the desorption tower through a pipeline. The desorption tower is communicated with a vacuum condensate tank through a vacuum pump module, and the vacuum condensate tank is communicated with the rich liquor tank through a vacuum condensate pump. The desulfurization effect is stable, the desulfurization efficiency is high, and the desorption effect is good.

The invention discloses aluminium killed steel refined deoxidizing and desulfurizing synthetic slag. A mixture is prepared from the following chemical components in weight percentage: 35-60 percent of CaO+BaO, 5-10 percent of CaF2, 10-30 percent of Al and 20-30 percent of Mg, wherein BaO accounts for 0-10 percent of the total weight percentage of the slag, and the proportion of Mg to Al is 1-1.5.The synthetic slag is convenient and easy to use and has a good deoxidizing effect, can reduce S in liquid steel to be less than 20*10<-6> and has a stable desulfurizing effect. The liquid steel does not resulfurize, the impurity content in the steel is low and a water gap is not blocked if continuous casting is carried out. The invention has simple method of application, obvious liquid steel deoxidizing and desulfurizing effect, obvious effect of reducing the impurity content in the steel and is suitable for producing high-quality clean steel.