41 results about "Sulphur granules" patented technology

A continuous production method of insoluble sulfur comprises the steps of sulfur melting, extraction, curing, crushing and drying. The continuous production method of insoluble sulfur is carried out under a totally closed condition. The method concretely comprises the following steps: 1, placing sulfur in a sulfur melting pool (1), melting, pumping the molten sulfur to a heating coil tube (3) through a metering pump (2), heating, and mixing high-temperature sulfur with low-temperature carbon disulfide in an ejector (4) to complete quenching; 2, letting the quenched mixed liquid comprising insoluble sulfur and carbon disulfide into a continuous-rotation rotary kiln (6) through a rotary joint (5) to form a mixed liquid containing cured insoluble sulfur particles and carbon disulfide; 3, conveying the mixed liquid obtained in step 2 to a crushing pump (8), and crushing; 4, sending the mixed liquid containing crushed insoluble sulfur and carbon disulfide to a material crushing pot (9), and carrying out solid-liquid separation through a filter screen; and 5, sending insoluble sulfur to a vacuum dryer (10), and drying. The method has the advantages of continuous production of the insoluble sulfur under the totally closed condition, safety, environmental protection, stable product quality, high efficiency, and low energy consumption.

The invention discloses a method for removing nitrate in underground water by using solid-phase heterotrophy and sulfur autotrophic integrated denitrification. A hybrid anaerobic baffled reactor (HABR) is used, wood chips and sulfur serve as reaction substrates and biofilm carriers in two-stage separating chambers of the HABR, the heterotrophic and autotrophic denitrification is integrated through a portioning structure of the HABR and a flow pushing state, wood chips serve as the carbon source and biofilm carriers in separating chambers in which wood chips are filled, the solid-phase denitrification is achieved under the cooperating action of cellulose degrading bacterium and heterotrophic denitrifying bacterium, alkalinity is provided for sequent sulfur autotrophic denitrification, and sulfur autotrophic denitrification bacterium inside a biofilm attached to sulfur particle surfaces can increase the nitrate removing load further in separating chambers in which sulfur particles are filled. A heterotrophic and autotrophic integrated denitrification process is developed, and a new method for disposing nitrate in underground water is provided.

The invention provides a sulphur pellet comprising at least one H2S-suppressant, comprising in the range of from 60 to 100 wt % elemental sulphur, based on the total weight of the pellet. The invention further provides a process for the manufacture of sulphur pellets comprising at least one H2S-suppressant, comprising the steps of:(a) mixing elemental sulphur, one or more H2S-suppressants and optionally a filler in a mixing unit to obtain a mixture;(b) shaping and / or palletizing the mixture obtained in step (a) in a palletizing unit to obtain H2S-suppressant-comprising sulphur pellets.The invention further provides a process for the manufacture of a sulphur-comprising asphalt paving mixture comprising the steps of:(i) preheating bitumen at a temperature of between 140 and 180° C.;(ii) preheating aggregate at a temperature of between 140 and 180° C.;(iii) mixing the hot bitumen with the hot aggregate in a mixing unit,wherein sulphur pellets comprising H2S-suppressant according to the invention are added in at least one of the steps (i), (ii) or (iii).The invention also provides the use of a sulphur-comprising asphalt paving mixture comprising H2S-suppressant in the paving of roads.

A potassium humate, rock phosphorous, sulfur granule: a fully soluble potassium humate component comprising about 3% of the composite granule; a sulfur component comprising about 15% of the composite granule; and a rock phosphate powder component comprising about 82% of the composite granule. The composite granule is semi-soluble and has a pH of 2.5 to about 12.

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.

A portable apparatus for producing sulphur granules includes a granulator with a rotatble drum having distinct zones for seed generation and product growth. The seed generation zone has an intense water spray pattern for each sulphur spray nozzle with intersecting water sprays to solidify molten sulphur and create seeds. The growth zone has a moderate, non-intersecting water spray pattern to allow sulphur nozzles to coat and grow a curtain of seeds into granules. The granulator's exhaust air is filtered either by a heated cyclone separator to recapture residual sulphur particles and moisture before venting, and / or by a granular air filter which uses the produced granules to filter the granulator's exhaust air. A two piece collar enhances maintenance of the granulator's drive system.

The invention relates to the technical field of sulfur, and relates to a modified sulfur granule and its preparation method and application; the raw material of the modified sulfur granule contains 80 to 100 parts of sulfur and 1 to 10 parts of hydrogen sulfide inhibitor in parts by weight; The modified sulfur granules are obtained according to the following steps: in the first step, add the required amount of sulfur and hydrogen sulfide inhibitor into the reaction vessel and mix them uniformly, then place the uniformly mixed sulfur and hydrogen sulfide inhibitor at 130°C to Heating in an oil bath at 140°C, the sulfur and hydrogen sulfide inhibitors are melted and reacted for 25 to 35 minutes before turning into bright gray black. In the present invention, sulfur and hydrogen sulfide inhibitors are heated and reacted in an oil bath, and the reacted mixture is poured into cold water and filtered to obtain modified sulfur particles; the present invention has the advantages of easy-to-obtain raw materials, stable physical and chemical properties, convenient storage and transportation, and The combination of asphalt and hydrogen sulfide has a good suppression effect, which reduces the production cost and improves the production efficiency.

The invention discloses a method for separating sulfur from a sulfur-containing system. The method comprises that a composition containing a Fe-based ionic liquid, a solvent and a surfactant is employed, the composition promotes agglomeration of sulfur simple substance in a sulfur-containing system, and therefore small-particle sulfur generated in a sulfur-containing system rapidly grows into a sulfur particle with relatively large particle size at a relatively low temperature, and the sulfur product generated in the desulphurization technology is easy for sedimentation and recovery, and is prevented from depositing on a reactor wall or blocking a pipe. Also, investment reutilization is realized and economic benefit is increased.