32results about How to "Low energy consumption for decomposition" patented technology

The invention relates to a method for producing alumina with aluminum-containing metallurgical material; the process comprises sulfuric acid decomposition of aluminum-containing metallurgical material, aluminium sulfate solution purification, aluminum precipitation of sodium carbonate salt, aluminum hydroxide calcination, sodium carbonate salt regeneration, sulphuric acid regeneration and other main procedures; the sulphuric acid, sodium bicarbonate and other chemical raw materials used in an alumina production process can be regenerated and recycled; and the method has the advantages of good alumina product quality, low production cost, environmental-friendliness and the like.

The present invention relates to the field of plasma chemistry, and discloses low temperature plasma reaction equipment and a hydrogen sulfide decomposing method. The reaction equipment comprises: aninner cylinder (1); an outer cylinder (2) nested on the outer portion of the inner cylinder (1); a center electrode (3) arranged in the inner cylinder (1); a grounding electrode (4) formed by a solidelectric-conduction material, wherein the grounding electrode forms at least part of the side wall of the inner cylinder or is arranged around the inner side wall of the inner cylinder; and a barriermedium arranged between the grounding electrode and the center electrode. According to the present invention, the low temperature plasma reaction equipment can achieve the continuous and stable performing of the hydrogen sulfide decomposition process at a significantly high hydrogen sulfide conversion rate, and can achieve long-cycle operation.

The invention relates to the field of plasma chemistry, and discloses a low-temperature plasma device for decomposing hydrogen sulfide and a method for decomposing hydrogen sulfide. The device contains a gas supply-gas distribution unit, a plasma reaction unit and a product separation unit connected sequentially through pipelines. The plasma reaction unit contains a low-temperature plasma reactor and a plasma power supply. The reactor includes: an inner cylinder, an outer cylinder, a central electrode arranged in the inner cylinder, and a side wall arranged around the inner cylinder or wrapped in the center The outer surface of the electrode or the barrier medium forming the side wall of the inner cylinder, the ground electrode; the thickness L of the discharge air gap 1 with the thickness of the barrier dielectric D 1 The proportional relationship is: L 1 :D 1 =(0.05~100):1. The low-temperature plasma device for decomposing hydrogen sulfide and the method for decomposing hydrogen sulfide provided by the invention can improve the conversion rate of hydrogen sulfide.

The invention relates to the field of plasma chemistry, and discloses a multi-reaction-tube low-temperature plasma device and a method for decomposing hydrogen sulfide, the device comprising: a firstcavity (1) formed by at least two parallel reaction tubes; the second cavity (2) that is nested in the first cavity (1); the third cavity (7) that is nested outside the first cavity (1); and an innerelectrode (3), an outer electrode (4) and a blocking medium (6) that are respectively arranged in each reaction tube. The multi-reaction-tube low-temperature plasma reaction device provided by the invention can be used for plasma decomposition of hydrogen sulfide, and the reactor can generate uniform and efficient dielectric barrier discharge, so that hydrogen sulfide is directly decomposed into hydrogen and sulfur.

The invention relates to the field of plasma chemistry, and discloses a method for decomposing hydrogen sulfide by plasma, comprising: introducing raw material gas containing hydrogen sulfide into a plasma system containing a plasma reactor for sulfurization under dielectric barrier discharge conditions Hydrogen decomposition reaction, the dielectric barrier discharge conditions include: a discharge voltage of 5-30kV, a discharge frequency of 200-30000Hz; and the conditions of the hydrogen sulfide decomposition reaction include: a reaction temperature of 0-800°C, a reaction pressure of -0.06 MPa to 0.6MPa, the residence time of the reactant in the plasma reactor is 1×10 ‑5 ~120s. The method for decomposing hydrogen sulfide by plasma provided by the present invention can obtain a higher conversion rate of hydrogen sulfide under dielectric barrier discharge conditions by adopting specific discharge conditions and hydrogen sulfide decomposition reaction conditions.

The invention relates to the field of plasma chemistry, and discloses a high-flux low-temperature plasma discharge device and a method for decomposing hydrogen sulfide, comprising: a first cavity (1); The second cavity (2); the high-voltage electrode (3) and the ground electrode (4) arranged in the first cavity (1), a blocking medium, and the blocking medium is arranged on the high-voltage electrode (3) and / or the The outer surface of the ground electrode (4). The low-temperature plasma discharge device provided by the present invention has the advantages of high hydrogen sulfide conversion rate, low energy consumption and capable of realizing large-flow hydrogen sulfide treatment.

The invention relates to the field of plasma chemistry, and discloses a low temperature plasma system for decomposing hydrogen sulfide, and a method for decomposing hydrogen sulfide. The system comprises a gas supply-gas distribution unit, a plasma reaction unit and a product separation unit, wherein the gas supply-gas distribution unit, the plasma reaction unit and the product separation unit aresequentially connected through pipelines, the plasma reaction unit comprises a low temperature plasma reactor and a plasma power source, the reactor comprises an inner cylinder, an outer cylinder, acenter electrode arranged in the inner cylinder, a barrier medium and a grounding electrode, the barrier medium is arranged around the side wall of the inner cylinder or wraps the outer surface of thecenter electrode or forms the side wall of the inner cylinder, and a ratio (L1:L2) of the thickness L1 of a discharge gas gap to the length L2 of a discharge region is 1:(0.5-6000). According to thepresent invention, with the apparatus and the method, the hydrogen sulfide conversion rate can be increased.

The invention relates to the field of plasma chemistry, and discloses a high-flux plasma reaction apparatus and a hydrogen sulfide decomposing method. The high-flux plasma reaction apparatus comprises: an inner cylinder (1) containing reaction pipes (14); an outer cylinder (2) nested on the outer portion of the inner cylinder (1); center high-voltage electrodes (3); grounding electrodes (4) respectively arranged around the outer side walls of each reaction pipe (14) or forming the side wall; and a barrier medium arranged on at least part of the outer surface of the center high-voltage electrode (3), wherein a ratio (L1:L2) of the distance L1 between the outer side wall of the barrier medium and the inner side wall of the grounding electrode and the length L2 of a discharge area is (0.5-6000). According to the present invention, the apparatus can achieve the continuous and stable performing of a hydrogen sulfide decomposing process at a significantly high hydrogen sulfide conversion rate, and can achieve long-period operation.

The invention discloses a method for preparing sulfuric acid with co-production lime by decomposing ardealite in a suspended state, the method comprises the following steps: a) crushing and drying; b)decomposing in a suspended state: the hot air flow at 850-1200 DEG C and minus 0.8KPa in the upper part pipe of a decomposing furnace (16) exchanges heat with gas-solid biphase of the ardealite, theardealite flows through the upper part pipe of the decomposing furnace (16) with the hot air flow and enters a cyclone material and gas separator (14), the materials separated by the cyclone materialand gas separator (14) enter the bottom of the furnace body for cyclic decomposition via an air lock feeder B (15) arranged at the lower part of the cyclone material and gas separator (14); a fluidized fan (17) at the bottom of the decomposing furnace produces a fluidized decomposition effect, a necking in the middle of the decomposing furnace produces a spayed decomposition effect; the high-concentration SO2 separated by the cyclone material and gas separator (14) and the lime are led to the upper part with the hot air flow at 850 DEG C and minus 1.8KPa for cyclone separation; and c) cycloneseparation. The method is characterized by short ardealite decomposition time, high decomposition efficiency, high-concentration SO2, energy saving and consumption reduction.

The invention relates to the field of plasma chemistry, and discloses a multi-reaction-tube plasma device and a method for decomposing hydrogen sulfide; the multi-reaction-tube plasma device comprises: a first cavity (1) formed by at least two parallel reaction tubes; a second cavity (2) that is nested in the first cavity (1); and an inner electrode (3), an outer electrode (4) and a blocking medium (6) that are respectively arranged in each reaction tube. The multi-reaction-tube plasma device provided by the invention can be used for plasma decomposition of hydrogen sulfide, and the reactor can generate uniform and efficient dielectric barrier discharge, so that hydrogen sulfide is directly decomposed into hydrogen and sulfur.

The invention relates to a method for producing alumina with aluminum-containing metallurgical material; the process comprises sulfuric acid decomposition of aluminum-containing metallurgical material, aluminium sulfate solution purification, aluminum precipitation of sodium carbonate salt, aluminum hydroxide calcination, sodium carbonate salt regeneration, sulphuric acid regeneration and other main procedures; the sulphuric acid, sodium bicarbonate and other chemical raw materials used in an alumina production process can be regenerated and recycled; and the method has the advantages of goodalumina product quality, low production cost, environmental-friendliness and the like.

The invention discloses an anaerobic decomposition furnace for household garbage, which comprises an inner cylinder, an outer cylinder, a driving mechanism, a first feeding machine, a second feeding machine and a discharging machine, both the outer cylinder and the inner cylinder are horizontal, and the driving mechanism Drive the outer cylinder to rotate, the inner cylinder and the outer cylinder are coaxially fixed in the outer cylinder, there is a heating chamber between the rear end of the outer cylinder and the inner cylinder, the inner cylinder has a first inclined lifting material plate, and the outer cylinder has a second inclined lifting material plate, the discharge end of the first feeder passes through the front end of the outer cylinder and the front end of the inner cylinder in sequence and communicates with the inner cavity of the inner cylinder, and the feed end of the discharge machine passes through the rear end of the outer cylinder and the The rear end communicates with the inner cavity of the inner cylinder. The discharge machine has a gas outlet and a solid outlet. The solid outlet communicates with the feed end of the second feeder. The discharge end of the second feeder communicates with the heating chamber. The outer cylinder The front end has a waste residue outlet. The domestic garbage anaerobic decomposition furnace provided by the invention can recycle and utilize the energy remaining in the domestic garbage, has low energy consumption for garbage decomposition, and can continuously decompose garbage.

The invention relates to the field of plasma chemistry, and discloses a plasma reactor and a method for decomposing hydrogen sulfide. The reactor comprises: an inner cylinder (1); an outer cylinder (2) nested in the outer portion of the inner cylinder (1); a center electrode (3) arranged in the inner cylinder (1); a grounding electrode (4) formed by a solid electric-conduction material, wherein the grounding electrode forms at least part of the side wall of the inner cylinder or is arranged around the inner side wall of the inner cylinder; and a barrier medium (6) arranged on at least part ofthe outer surface of the center electrode (3). According to the present invention, the low temperature plasma reactor can achieve the continuous and stable performing of the hydrogen sulfide decomposition process at a significantly high hydrogen sulfide conversion rate, and can achieve long-cycle operation.