43results about How to "Improve sulfur removal efficiency" patented technology

The invention discloses a method for removing sulphur and iron of sodium aluminate solution. The method comprises the following steps: 1) adding an iron-based additive to the sodium aluminate solution containing S2- and iron in the ratio of F to S (mole ratio of Fe to S2- in the solution) of 0.1 to 2.0, and carrying out a reaction for 10 to 600 minutes at 30 to 130 DEG C; and 2) carrying out solid-liquid separation on the size after the reaction, so as to obtain the sodium aluminate solution and slag with the sulphur and iron removed. By adopting the method, the S2- and the iron in the sodium aluminate solution can be economically and efficiently removed at the same time, and the problems in Bayer process on treatment of high-sulfur bauxite that the consumption of alkali is increased, the iron content in the product is beyond the standard, and the equipment is corroded, can be solved.

The invention relates to the technical field of water purification and particularly relates to a method for efficiently removing sulfide in water and a special device for the method. Two-stage electrochemical treatment is carried out by using a two-stage chemical treatment device, and iron or iron alloy is used as an anode in the two-stage electrochemical treatment, wherein high-concentration sulfide in water is treated in the first-stage electrochemical treatment stage by means of the oxidation effect of the anode and the sedimentation effect of ferrous irons generated by dissolving iron anodes, and low-concentration sulfide in water is rapidly and thoroughly removed through adding a proper amount of hydrogen peroxide before second-stage electrochemical treatment by means of ferrous ions generated by uniformly dissolving the hydrogen peroxide and the anode, fenton reaction generated by electrochemical effects and an electrocatalytic effect. When the method is used for treating sulfide-contained wastewater or domestic drinking water, the removal rate of sulfide can be more than 99.9%. Generally speaking, after sulfide-contained wastewater and domestic drinking water are treated by using the method provided by the invention, the content of sulfide can be respectively up to the discharging standard and the drinking water standard.

The invention discloses an organic composite efficient sulfur removal agent for oil-gas field and preparation method and application of the organic composite efficient sulfur removal agent. The sulfur removal agent is characterized in that water serves a solvent and comprises an alcohol amine component A, an alcohol amine component B, a triazine derivative, inhibiter, synergist and low-molecular mass alcohols; the alcohol amine component A refers to methyldiethanolamine, the alcohol amine component B refers to one of triethanolamine and diethanolamine or a mixture of triethanolamine and diethanolamine; triazine derivative refers to hexahydro-1,3,5-tris-s-triazine; the inhibiter refers to seventeen alkenyl amide ethyl imidazoline; the synergist refers to sulfolane; the low-molecular mass alcohols refer to one of ethylene glycol and glycerol or a mixture of ethylene glycol and glycerol. The sulfur removal agent has the advantages of good selectivity on sulfuretted hydrogen, small dosage, quick effect, high sulfur removal efficiency, no corrosion of steel, stable product performance, difficulty in heating decomposition, capability of being biodegradable and the like; sulfide like sulfuretted hydrogen existing in extraction of an oil-gas well can be effectively removed or reduced to safety threshold value range in content, corrosion of sulfide on pipelines and equipment is inhibited, and safety on the equipment and operation personnel is guaranteed.

The invention discloses a method for synthesizing a phosphotungstic acid-titanium dioxide composite spherical nanometer material by a one-step sol-gel method and belongs to the technical field of preparation of functional nanometer materials. The method avoids complex experimental steps and high energy consumption of solvent-induced self-assembly and hydrothermal methods and greatly simplifies the experimental flow. The shape and size of the prepared phosphotungstic acid-titanium dioxide composite spherical nanometer material are controllable. The material with the spherical-like nanometer structure has high sulphur removal efficiency and is applied to a sulphur removal reaction by extraction combined with catalytic oxidation. DBT simulated oil with sulphur content being 350ppm can be degraded to reach the sulphur content of 4.8ppm by 70mg of catalyst within 2h. The novel preparation method of the nanometer catalyst is simple, has the characteristics of good thermal stability, less energy consumption of equipment and environmental friendliness, and is expected to be actually developed in and applied to the sulphur removal industry production.

The invention discloses an efficient desulfurizing tower. The tower comprises a tower body, wherein the tower body is cuboid-shaped; a discharge tower and a transfer tower which are sequentially arranged in parallel are arranged in the tower body; a sealing plate is arranged between the discharge tower and the transfer tower; two input towers which are arranged in parallel in a vertical directionare arranged on the other side of the transfer tower; the two input towers are separated by a partition plate; a lime slurry pool is arranged at the bottom of each input tower, an opening is formed inthe top of each lime slurry pool, an input pipe is arranged on the side face of the tower body, the input pipe is provided with two branch pipes, the branch pipes are inserted into the input towers in a one-to-one correspondence mode, a plurality of diverting insertion pipes are arranged on the branch pipes, and the bottoms of the diverting insertion pipes are located in the lime slurry pools; and a transfer pipe is arranged in the transfer tower and is in butt joint with the input tower through a connecting inner pipe. When the efficient desulfurizing tower is used for desulfurizing gas, desulfurization efficiency is greatly improved through multi-stage absorption; and aeration absorption is carried out in an airflow dispersion mode through the arrangement of gas distribution pipes, so desulfurization effect is ensured.

The invention discloses a preparation method of a suspension liquid desulfurization agent for a water-based oil testing well completion fluid system. The suspension liquid desulfurization agent is prepared from the following raw materials in parts by weight: 5 to 8 parts of a surface modifying agent, 0.8 to 1 part of an emulsifier, 1 to 3 percent of a dispersant and 10 to 30 parts of nano-powder;the preparation method comprises the following steps: adding the surface modifying agent into isopropyl alcohol in a container A; heating to 60 to 80 DEG C and stirring to form a uniform solution; adding the dispersant, the emulsifier and the nano-powder into a water solution with the pH (Potential of Hydrogen) of 9 to 10 in a container B; heating to 60 to 80 DEG C and stirring to form a uniform solution; under the action of rapid stirring, adding the uniform solution formed in the container A into the container B and stirring for 2h to form slurry which is uniformly dispersed; cooling to roomtemperature. According to the preparation method disclosed by the invention, the desulfurization agent and a well completion fluid system treatment agent are not gathered and consolidated under a high-temperature condition of 180 DEG C; the desulfurization agent does not influence the rheological property and sedimentation stability of the well completion fluid system under the high-temperature condition, and the aim of high desulfurization efficiency is realized.

The invention relates to the technical field of organic sulfur removal, in particular to an environment-friendly sulfur removal agent and a removal technology thereof. The environment-friendly sulfurremoval agent is prepared from triazine derivatives, an anti-scaling agent and an activating agent in a certain ratio, wherein in percent by volume, the triazine derivatives accounts for 65-90%, the anti-scaling agent accounts for 1-30%, the activating agent accounts for 5-10%, the triazine derivatives react with organic sulfur, the anti-scaling agent is used for inhibiting scaling of high-hardness gas field water, the organic sulfur is insoluble in water, and the triazine derivatives are water soluble, so that the activating agent is used for quickening reaction between the triazine derivatives and the organic sulfur, and products after reaction are soluble in water. A filling technology adopts spray filling, the filling is carried out by adopting a spraying mode behind a sulfur removal tower in a gas field with high sulfur content, spray filling is directly carried out at the wellhead in a gas field with low sulfur content, and the average particle size during filling is less than 40microns. Compared with the traditional sulfur removal agent, the novel environment-friendly sulfur removal agent has the characteristics of high filling efficiency, no toxicity, no harm, no secondarypollution and applicability of products to industrial production.