41 results about "Sulphur granules" patented technology

The invention comprises a preparation method of composite anode material for lithium element sulphur secondary battery, belonging to the field of chemical energy storage battery. The composite material is formed by taking element sulphur as electrode active center and conductive polymer polythiophene with excellent in-situ chemical oxidation polymerization conductivity as shell. The concrete preparation method comprises adding anhydrous chloroform in element sulphur and anhydrous ferric chloride, mixing uniformly, putting into a controllable low temperature reaction kettle, and slowly adding monomer thiophene by adopting in-situ chemical oxidation polymerization process to clad polythiophene on the surface of sulphur granules to form the composite product with uniform granules. The composite anode material prepared by the inventive method has high electrochemical activity, and the battery packed by the material has large discharge specific volume and long cycle life, thus having advantage in new system of large volume energy storage battery.

The invention belongs to the field of oil field tail gas treatment, and relates to a system and a method used for removing hydrogen sulfide in oilfield associated gas and secondary gas. According to the system, a double path mode is adopted, one path is adopted for absorption, and one path is adopted for oxidation regeneration. The numbers of absorbing towers and regeneration towers can be designed based on-site practical situations. Compared with other conventional technology, the system and the method possesses following advantages: the safety is better, environment protection is achieved, raw materials are saved, the effect is stable, the separated gas is capable of reaching discharging requirements, rapid sulphur enriching is realized, the enriched sulphur particles are large, blocks are large, the purity is high, and the utilization value is high.

The invention relates to the technical field of sulfur, and in particular relates to modified sulfur granules and a preparation method and application thereof. The modified sulfur granules comprise the following raw materials in parts by weight: 80-100 parts of sulfur and 1-10 parts of hydrogen sulfide inhibitor. The modified sulfur granules are prepared by the following steps of: adding the sulfur and hydrogen sulfide inhibitor of the required amount into a reaction container and uniformly mixing; heating the uniformly mixed sulfur and hydrogen sulfide inhibitor in an oil bath at 130-140 DEG C; and after the sulfur and hydrogen sulfide inhibitor are molten, reacting for 25-35 minutes until the product has a bright ash black color. According to the sulfur granules provided by the invention, after the heating reaction of the sulfur and hydrogen sulfide inhibitor in the oil bath, the mixture after the reaction is poured into cold water and then filtered to obtain the modified sulfur granules. The sulfur granules provided by the invention have the characteristics that the raw materials are easily available, the physical and chemical properties are stable, the sulfur granules are convenient to store and transport, and the hydrogen sulfide inhibition effect is good in combination with asphalt; and moreover, the production cost is reduced, and the production efficiency is improved.

The invention discloses a sulfur particle flocculating agent applicable to iron-based desulfurizing solution. The sulfur particle flocculating agent is composed of a flocculation initiating agent, a flocculation coagulating agent and a flocculation settling agent. By addition of the sulfur particle flocculating agent into complex iron desulfurizing solution, sulfur particles generated in a desulfurizing process can be flocculated and settled in a settling tank spontaneously, and consequently the sulfur particles can be separated out to prevent tower blockage and realize reclaiming of by-product sulfur.

The invention discloses a method and a device for preparing sulfur by recovering hydrogen sulfide gas from viscose waste gas. The method comprises the following steps: preparing a washing solution from ethylenediamine tetraacetic acid, triethanolamine, ferrous sulfate, sodium carbonate and water; pumping the washing solution into an H2S washing tower for spraying, introducing viscose waste gas through the bottom of the washing tower and realizing full contact of the waste gas with the washing solution in a countercurrent mode, and absorbing hydrogen sulfide gas in the viscose waste gas by thewashing solution; conveying enriched elemental sulfur containing liquid flowing out of the bottom of the washing tower into a centrifugal machine; conveying concentrated sulfur slurry separated by thecentrifugal machine into a sulfur recovery device; heating sulfur to 135 DEG C in the sulfur recovery device and thenmelting into liquid sulfur, conveying pure sulfur liquid into a sulfur granulator,separating into small liquid drops and cooling to 50 DEG C for solidification to obtain sulfur particles. The method has the beneficial effects that hydrogen sulfide is selectively treated, a large amount of detergent is not consumed, heating and pressurizing are not needed, and the hydrogen sulfide gas can be recycled from the viscose waste gas to prepare sulfur.

The invention discloses an insoluble sulfur production system and method. The production system comprises a polymerization kettle, a quench tower, a washing filter and a dryer, a discharge port of the polymerization kettle communicates with a feed port of the quench tower through a pipeline, a discharge port of the quench tower communicates with a feed port of the washing filter through a discharge pump through a pipeline, and a discharge port of the washing filter is connected with a feed port of the dryer through a pipeline. According to the production system disclosed by the invention, granulation, curing, extraction and crushing processes are integrated, continuous quenching, curing and the like of the polymerized sulfur are realized, and the technological process is simplified. According to the method, the operation process is shortened, the purity, thermal stability and yield of the product are ensured, the blockage of a sulfur particle system is avoided, and the production process has the characteristics of safety, reliability, simple equipment and operation, low operation cost, obvious energy-saving effect and the like.

The invention relates to the technical field of desulfurization, and particularly discloses a complex iron desulfurizer as well as a preparation method and application thereof. The complex iron desulfurizer comprises, by weight, 0.4 to 1 part of a soluble iron salt, 2 to 10 parts of iminodisuccinate, 2 to 10 parts of polyaspartate, 10 to 15 parts of a hydrogen sulfide absorbent, 1 to 5 parts of a corrosion inhibitor and 900 to 1100 parts of water. The preparation method of the complex iron desulfurizer comprises the following steps: adding the soluble iron salt into water for dissolving according to the weight part ratio, then sequentially adding the iminodisuccinate, the polyaspartate, the corrosion inhibitor and the hydrogen sulfide absorbent, and adjusting the pH value to 8-9 to obtain the complex iron desulfurizer. The complex iron desulfurizer provided by the invention has the advantages of high sulfur capacity, low secondary salt generation amount and no temperature influence, and the generated sulfur particles have the advantages of high purity, large particle size and easiness in separation, and have relatively high application value.

The invention discloses an insoluble sulfur production system and a production method. The production system comprises a polymerization kettle, a quench tower, a washing filter and a dryer, a discharge port of the polymerization kettle communicates with a feed port of the quench tower through a pipeline, a discharge port of the quench tower communicates with a feed port of the washing filter through a discharge pump through a pipeline, and a discharge port of the washing filter is connected with a feed port of the dryer through a pipeline. According to the production system disclosed by the invention, granulation, curing, extraction and crushing processes are integrated, continuous quenching, curing and the like of the polymerized sulfur are realized, and the technological process is simplified. According to the method, the operation process is shortened, the purity, thermal stability and yield of the product are ensured, the blockage of a sulfur particle system is avoided, and the production process has the characteristics of safety, reliability, simple equipment and operation, low operation cost, obvious energy-saving effect and the like.

The invention provides a separation and extraction method for sulfur powder in water during preparation of insoluble sulfur. The method is characterized by comprising the following steps: pumping slurry formed by water and crude insoluble sulfur powder into a separation tank by using a pump, wherein an extraction solvent is added into the separation tank, settling sulfur particles to enter the solvent, pumping a mixture of the solvent and the sulfur particles into the upper part of an extraction tower by using a pump, pumping the solvent to the lower part of the extraction tower by using a pump, allowing the solvent flowing out from the top of the extraction tower to return to the separation tank, performing evaporation on part of the solvent to recover the solvent to obtain soluble sulfur, adding a stabilizer into insoluble sulfur and a solvent flowing out from the bottom of the extraction tower, performing filtration, and performing evaporation to recover the solvent and obtain the purified insoluble sulfur.

The invention discloses a wet oxidation desulfurization system for Claus hydrogenation tail gas, and relates to the technical field of industrial tail gas desulfurization. The system comprises a buffer tank, a booster fan, a dynamic wave washer, an absorption tower, a regeneration tower, a settling tank, a washing tank and a filter bag centrifuge. The invention also provides a desulfurization method adopting the organic phase iron-based ionic liquid desulfurization system. The desulfurization system disclosed by the invention has the beneficial effects that the desulfurization system disclosed by the invention can realize wet-process oxidation desulfurization of Claus hydrogenation tail gas, meanwhile, desulfurization liquid cyclic regeneration and sulfur separation are realized, through a dynamic wave-absorption tower-washing tank three-step treatment process, the desulfurization efficiency of hydrogen sulfide reaches 99.9% or above, the pH of a desulfurization system and the morphology of sulfur particles do not need to be regulated and controlled in the desulfurization process, and secondary pollution is avoided.

The invention provides complete equipment and a method for drum sulfur granulation with a cooling flow channel. The complete equipment comprises a liquid sulfur distributor, a cooling granulation drum, a cooling water circulation system and a scraper, wherein the liquid sulfur distributor can distribute and drop liquid sulfur produced by an upstream device to the outer surface of the cooling granulation drum; the cooling granulation drum can rotate around a central shaft, the outer surface of the cooling granulation drum can be used for cooling liquid sulfur to form sulfur particles, and a cooling flow channel is arranged in the cooling granulation drum and can be used for cooling the outer surface; the cooling water circulation system is in circulation communication with the cooling flowchannel and can provide cooling water for the cooling flow channel; and the scraper is in scraping connection with the outer surface of the cooling granulation drum and can be used for scraping sulfurparticles on the outer surface of the cooling granulation drum. The outer surface of the cooling granulation drum is adopted for sulfur granulation, and the interior of the cooling granulation drum communicates with the cooling water system, so sulfur is not in direct contact with cooling water, and the water content of a product is low.

The present invention relates to the technical field of slow release fertilizers, in particular to a non-agglomerated slow release fertilizer containing sulfur, phosphorous and ammonium and a preparation method thereof. According to the method provided by the present invention, after sulfur particles and water containing dispersant are mixed and are subjected to ultrasonic treatment, a thickener and a moisturizer are added in the mixture, the ultrasonic treatment is performed again to enable the dispersant, the moisturizer and the thickener to be filled among the sulfur particles, then the mixture is ground by a grinding mill, so that hydrophilicity modification treatment is performed on the sulfur particles, the content of the sulfur in the aqueous solution is high, an explosion accident caused by dust accumulation can not occur, and production safety is improved; the prepared sulfur-covered slurry is sprayed on surfaces of diammonium phosphate particles containing 18% of nitrogen and 46% of phosphorous so as to ensure that the thickness of a sulfur layer on the surface of the prepared slow release fertilizer containing sulfur, phosphorous and ammonium is 0.1-0.3 times of the diameters of the particles; and in the slow release fertilizer containing sulfur, phosphorous and ammonium, the sulfur content is 8-12%, the nitrogen content is 15-17% and the phosphorous content is 41-43%. Quality of the slow release fertilizer containing sulfur, phosphorous and ammonium is improved.

The invention belongs to the technical field of biological sewage treatment, and particularly relates to a device and method for deeply denitrifying landfill leachate through an electrochemical coupling sulfur autotrophic denitrification system, the electrochemical coupling sulfur autotrophic denitrification system is adopted, the process operation is simple, the operation is convenient, and the stability is high; the device and method are used for deeply denitrifying the landfill leachate, an external carbon source is not needed, the sludge yield is low, the denitrification efficiency is high, and a subsequent residual sludge treatment process is not needed; in the sulfur autotrophic denitrification process, as elemental sulfur is adopted as an electron donor, the pH does not need to be adjusted, and the denitrification activity of microorganisms is well guaranteed; in the operation process, a large number of functional microorganisms can be enriched on the surfaces of the sulfur particles, the carbon particles and the electrode plates, so that sulfur autotrophic denitrification on the surfaces of the sulfur particles can be coupled with hydrogen autotrophic denitrification performed on the microorganisms on the surfaces of the cathode plates and the carbon particles, and the denitrification effect is further enhanced; the deep denitrification of the low-carbon-nitrogen-ratio landfill leachate is realized.

The invention relates to the field of sulfur wet forming, in particular to a sulfur wet forming system which comprises a water tank used for containing process water, a liquid storage tank used for storing alkali liquor, a pH detector used for detecting the pH value of process water in the water tank, a liquid injection pipeline connected to the liquid storage tank and a controller. The liquid injection pipeline is used for injecting the alkali liquor in the liquid storage tank into the water tank, and is provided with a metering pump. The controller is used for controlling the metering pump to be opened or closed according to a detection value of the pH detector. According to the sulfur wet forming system, the pH value of process water is always kept in a proper range in the production process, equipment and pipelines are prevented from being corroded, the service life of the sulfur wet forming system is prolonged, and the forming quality of sulfur particles is improved.