32results about How to "Reduce desulfurization" patented technology

The present invention provides a hydrodesulfurization that can attain an extremely high depth of desulfurization to a sulfur content of 10 ppm by mass, exert high denitrogenation activity, and has high nitrogen resisting properties to nitrogen compounds which are substances inhibiting desulfurization reaction. The catalyst is suitable for hydrodesulfurizing petroleum hydrocarbons and characterized in that an inorganic porous support composed of mainly alumina contains, as active metals, at least one metal selected from the metals of Group 8 of the periodic table and at least one metal selected from the metals of Group 6A of the periodic table in a molar ratio defined by [oxide of the Group 8 metal]/[oxide of the Group 6A metal] ranging from 0.105 to 0.265 and the content of the Group 6A metal in terms of oxide is in the range of 20 to 30 percent by mass based on the mass of the catalyst.

The invention discloses a micro oxygen rich combustion W flame boiler and a CO2 emission reduction system, which is characterized in that anthracite or low-volatile coal is introduced in the W flame boiler furnace for fully combusting, the formed flue gas is divided into two strands through a heat exchange zone and a gas-gas heat exchanger after cooling, one strand is taken as a recycling flue gas; air and oxygen are simultaneously heated in the gas-gas heat exchanger, the heated air is divided into three strands, oxygen is divided into two strands, a first strand of oxygen and a first strand of air are mixed and introduced in a furnace arch primary air pipeline, a second strand of oxygen and a second strand of air are mixed and introduced in a furnace arch secondary air pipeline, and a third air is introduced in a back and forth wall secondary air pipeline. The invention combines the micro oxygen rich combustion technology and the W flame boiler, the desulphurization, denitration and capture with lower cost can be realized, and zero discharge can be realized. The pure oxygen amount required by fuel combustion with unit mass under a micro oxygen rich combustion mode is obviously reduced by comparing with oxygen rich combustion, and energy consumption and cost of air separation oxygen preparation can be greatly reduced.

The invention relates to a meta titanate treatment method, comprising the following steps of: pulping metatitanic acid; adding an alkaline compound into the metatitanic acid pulp until the pH value is above 3; filtering and washing; adding dissoluble aluminum salt, dissoluble phosphate, dissoluble potassium-containing compounds and zinc-containing compounds into a filter cake and mixing uniformly; and calcining and crushing to obtain titanium dioxide. Compared with the prior art, the meta titanate treatment method provided by the invention has the advantages that the energy consumption is reduced; the production efficiency is improved; and the mellowness of the titanium dioxide is improved.

The invention provides a method for preparing activated rubber powder by catalytic reaction and activating reaction, and relates to a method for comprehensive utilization of waste and scrap rubber. Compared with the production of regenerated rubber, the method reduces processes of desulfurizing, kneading and refining, thereby avoiding secondary pollution to the environment. The prepared activated rubber powder has excellent compatibility with matrix rubber, and improves the physical and mechanical properties of the product. The formulation comprises the following compositions in weight portion: 100 portions of 30 to 40 meshes of waste rubber powder, 8 to 17 portions of plasticizer-dipentene, 5 to 8 portions of dusting agent-pottery clay, 0.2 to 0.5 portion of catalyst-cuprous chloride, 7 to 1.0 portion of promoting agent-polyalkylphenol disulfide, and 1 to 2.5 portions of dispersing agent-ethanol. The method comprises the following steps: placing the 30 to 40 meshes of waste rubber powder into a high-speed stirring reactor, and heating the waste rubber powder to the temperature of between 80 and 100 DEG C; adding the plasticizer, the dusting agent, the catalyst, the promoting agent and the dispersing agent into the reactor sequentially for reacting for 10 to 20 minutes at a temperature of between 80 and 120 DEG C, and cooling and discharging to produce the activated rubber powder. The prepared activated rubber powder can be used in rubber industry and building industry.

The invention belongs to the field of flue gas purification and provides an acetylene sludge desulfurization method for a coal-fired boiler. The method comprises the following steps: (1) drying the acetylene sludge until the moisture content is less than 2 percent; and (2) blowing the acetylene sludge into a hearth of the coal-fired boiler by using a Roots blower, wherein the blowing position is a bend at a secondary air inlet below front and rear walls of the hearth, and four blowing points are distributed on the front wall and another four blowing points are distributed on the rear wall. The main component of the acetylene sludge is Ca(OH)2, calcium element contained in industrial waste residues remained in acetylene gas generated by adding water into calcium carbide can be reacted with SO2 in flue gas in a CaO form, SO2 emission is reduced, and desulfurization in a circulating fluidized bed boiler is realized. However, the acetylene sludge delivery and blockage problem and the problems such as feeding non-uniformity, incomplete reaction and large desulfurization indicator fluctuation in the circulating fluidized bed boiler are not solved. According to the invention, the problems of blockage, feeding non-uniformity, incomplete reaction and large desulfurization indicator fluctuation in the acetylene sludge delivery process are solved.

An electrochemical and flywheel hybrid energy storage system comprises an electrochemical energy storage device, a battery management system, a flywheel energy storage device, a flywheel control system, an energy storage energy management system, an energy storage auxiliary frequency modulation control device group, a bidirectional converter group and a transformer group. The device of the power plant unit combined with the electrochemical and flywheel hybrid energy storage system comprises the power plant unit and the electrochemical and flywheel hybrid energy storage system. The power plant unit is combined with the electrochemical and flywheel hybrid energy storage system, the electrochemical energy storage device and the flywheel energy storage device are preferentially controlled to perform corresponding actions when a power grid needs to be subjected to load increasing/decreasing frequency modulation, and the system has the advantages of high regulation speed, short response time and high regulation precision; and the electrochemical energy storage device and the flywheel energy storage device can quickly supplement or absorb the part of energy to maintain the stable bus voltage and ensure the safe operation of a high plant transformer.

A method and composition for removing sulfur from molten ferrous material, particularly molten iron. The desulfurization agent includes reclaimed magnesium scrap, a gas-producing compound and a calcium compound.

The invention discloses a supercooled IN718 high-temperature alloy purifying agent and a preparation method for the same. The preparation method includes: sufficiently mixing 45-55 parts of CaF2 (calcium fluoride), 8-12 parts of NaCl (sodium chloride), 8-12 parts of KCl (potassium chloride), 18-22 parts of CaO (calcium oxide), 4-6 parts of TiO2 (titanium dioxide), 4-6 parts of MgO (magnesium oxide) and 0.5-1.0 part of AlF3 (aluminum fluoride) to obtain mixed powder; heating the mixed powder to 800 DEG C and then preserving heat for 8 hours; naturally cooling the mixed powder to room temperature after heat preservation; and milling the mixture into powder after crushing the mixture, and adding 0.5-1.0 part of rare earth compound LaCl3 (lanthanum chloride) to obtain the purifying agent. The purifying agent can integrate the functions of overwrite protection, oxidation and volatilization prevention and impurity removal, components of the purifying agent are easy to obtain, the purifying agent is convenient to add, the operating process is simple, and the cost is low.

The invention relates to a stainless-steel smelting slagging agent and a smelting slagging method, in particular to a smelting slagging agent and a smelting slagging method adopting the AOD (Argon Oxygen Decarburization) double slag process, and belongs to the field of stainless-steel smelting. The smelting slagging agent adopting the AOD double slag process comprises a first ingredient and a second ingredient, wherein the first ingredient is waste (high alumina crushed brick) generated after cast steel pouring; the second ingredient is fluorite; high alumina crushed brick comprises the following materials by mass: 68 to 72 percent of Al2O3, 22 to 28 percent of SiO2, 2 to 5 percent of CaO and 2 to 5 percent of Fe2O3; and the mass ratio of the first ingredient to the second ingredient is 0.5 to 1. The smelting slagging agent adopting the AOD double slag process is low in cost, facilitates environmental protection, and is high in comprehensive slagging effect.

An environmentally friendly flux for molten steel desulfurization includes CaO and Al₂O₃ so that [CaO]/[Al₂O₃] is within a range of 1.6 to 3.0, and includes one or more alkali metal oxides of Na₂O, K₂O, and Li₂O, and SiO₂ so that [SiO₂]/[R₂O] is within a range of 0.1 to 3, [R₂O] is within a range of 0.5 mass % to 5 mass %, and [SiO₂] is within a range of 0.05 mass % to 15 mass % in a case in which the [CaO], the [Al₂O₃], the [SiO₂], and the [R₂O] represent the mass % of CaO, the mass % of Al₂O₃, the mass % of SiO₂, and the total amount of the mass % of Na₂O, the mass % of K₂O, and the mass % of Li₂O respectively.

The invention discloses a method for refining and rapidly slagging low-carbon low-silicon aluminum-containing killed steel, and belongs to the technical field of alloy steel. The method comprises the following steps: adding the refining synthetic slag accounting for 28-35% of the total amount of a converter and lime slag accounting for 28-35% of the total amount of the converter in the tapping process of the converter; adding the residual refining synthetic slag and lime slag in the refining process; the total amount ratio of the refining synthetic slag to the lime slag is 1: (5-7); the refining synthetic slag is prepared from the following components in percentage by weight: 20-50% of metal aluminum, 35-60% of Al2O3 and 10-20% of CaO, and the granularity of the metal aluminum is less than 5 mm. According to the method, white slag operation is achieved within 15 minutes in the refining process, the generated white slag has sufficient time for desulfuration and inclusion removal in the later stage of refining, and meanwhile cost can be reduced and efficiency can be improved.

The invention relates to a coal gas purification method to mainly overcome a technical problem that cooling pipelines of compressors are liable to be blocked and sulfur dioxide emission is excessive because sulfides, tar, benzene and naphthalene are not thoroughly removed in coke oven gas purification in the prior art. The problem is solved well by adopting a technical scheme, wherein the method includes a) feeding coke oven gas discharged from a coke oven into a crude debenzolization unit, and performing crude debenzolization to form a stream I, with a molecular sieve adsorbent A being adopted in crude debenzolization; b) feeding the stream I into a crude desulfurization unit, and performing crude desulfurization to form a stream II, with a molecular sieve adsorbent B being adopted in crude desulfurization; c) feeding the stream II into an integrated purification column containing a molecular sieve adsorbent C, and removing residual aromatic hydrocarbons and sulfides in the gas at thesame time to form a stream III; and d) feeding the stream III into a subsequent gas utilization workshop section. The method can be applied in industrial production of power generation with coke ovengas.

The invention provides a sulfur solidifying catalyst. The sulfur solidifying catalyst is prepared by mixing the following raw materials by weight percent: 20%-30% of glycerol, 5%-10% of sodium carbonate, 5%-15% of sodium methylallyl sulfonate, 8%-13% of sodium gluconate, 6%-15% of titanium dioxide, 2%-6% of triethanolamine and 25%-35% of water, wherein the sum of the weight percent of the raw materials is 100%. Titanium dioxide is modified to obtain nano titanium dioxide material. According to the sulfur solidifying catalyst, fire coals can be burned sufficiently, 10% or above dosages of fire coals can be reduced, the emission amount of sulfur dioxide can be reduced, 30% or above desulfurization amount can be achieved, and meanwhile, the emission amount of dust and harmful gas can be reduced.

The invention discloses a sintering machine head flue gas desulfurization and denitrification treatment device and a treatment method thereof. The device comprises a dry desulfurization tower, a bag-type dust collector, a GGH flue gas heat exchanger, a low-temperature catalyst SCR reactor, a variable-frequency fan and a chimney which are sequentially communicated. The GGH flue gas heat exchanger is provided with a first input end, a first output end, a second input end and a second output end. The air outlet end of the bag-type dust collector is communicated with the first input end, the firstoutput end is communicated with the air inlet end of the low-temperature catalyst SCR reactor, the air outlet end of the low-temperature catalyst SCR reactor is communicated with the second input end, and the second output end is communicated with the variable-frequency fan. The dry desulfurization technology and the low-temperature SCR catalyst are combined for use, the stability of the system is improved, excessive consumption of a desulfurizing agent is avoided, and consumption of heating fuel is reduced.

The invention discloses a hearth temperature water-cooling control device for a large circulating fluidized bed boiler. By the adoption of the hearth temperature water-cooling control device for the large circulating fluidized bed boiler, the problem that the hearth temperature of a circulating fluidized bed boiler is slightly higher and difficult to control is solved. The hearth temperature water-cooling control device for the large circulating fluidized bed boiler comprises a hearth, a water-cooling partition wall, a steam pocket, connecting pipes, an upper header and a lower header, wherein the water-cooling partition wall, the steam pocket, the connecting pipes, the upper header and the lower header are located in the hearth. The hearth comprises a hearth roof, a front wall, a rear wall, a left side wall and a right side wall, wherein a rectangular cylinder is formed by the front wall, the rear wall, the left side wall and the right side wall. The water-cooling partition wall comprises a plurality of heat exchange pipes, abrasion-proof fins and flat steel, wherein the heat exchange pipes are arranged on the same plane in parallel, the flat steel is welded between every two adjacent heat exchange pipes, and the heat exchange pipes and the flat steel are arranged linearly; the abrasion-proof fins are welded to the two sides of each heat exchange pipe. The water-cooling partition wall horizontally extends to the middle of the hearth and vertically penetrates through the hearth. The upper end and the lower end of the water-cooling partition wall communicate with the upper header and the lower header correspondingly. The upper header and the lower header communicate with the steam pocket through the connecting pipes, and a circulation loop is formed. One side of the water-cooling partition wall is fixedly connected to the middle of the front wall of the hearth and is perpendicular to the front wall, and the other side of the water-cooling partition wall horizontally extends to the middle of the hearth.

The invention provides a method for preparing a sulphur capturing catalyst, which comprises steps: raw materials with percentage by weight comprising glycerol 20%-30%, sodium carbonate 5%-10%, sodium methallyl sulfonate 5%-15%, sodium gluconate 8%-13%, titanium dioxide 6%-15%, triethanolamine 2%-6% and water 25%-35% are weighed; the odium carbonate, the sodium methallyl sulfonate and the sodium gluconate are added into 3/4 water, are fully stirred for 50-70 hours through a stirring tank to prepare a mixed liquid A; the titanium dioxide is added into the residual 1/4 water to be stirred for 25-35 minutes through the stirring tank, and is fully stirred for 50-70 hours by further adding with the glycerol and the triethanolamine to prepare a dispersion liquid B; and the mixed liquid (b) A (/b) and the dispersion liquid (b) B (/b) are mixed to fully stir for 25-35 minutes, thereby preparing the sulphur capturing catalyst. The sulphur capturing catalyst which is made through the method for preparing the sulphur capturing catalyst enables coal to be more fully burnt, can reduce coal usage above 10%, reduces above 30% emission of sulfur dioxide and desulfurization, and reduces emission of dust and harmful gas simultaneously.