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37results about How to "Economic recovery" patented technology

Compact natural gas steam reformer with linear countercurrent heat exchanger

The present invention is natural gas steam reforming apparatus for generating an output gas mixture of carbon dioxide and hydrogen. The apparatus is made from two enclosures. A first enclosure contains a source of water, superheated steam, and channels, located within a lower portion of the first enclosure, which contain a water-gas-shift catalyst for converting CO into CO2 and H2. The heat from hot gas flowing through the channels is released into the first enclosure to boil the water to generate the superheated steam. A second enclosure, contained within an upper portion of the first enclosure, includes a steam inlet for receiving the superheated steam from the first enclosure; a combustion chamber; and a reformation chamber. The combustion chamber is used for combusting a portion of the natural gas to generate additional steam, heat, and a hot gas mixture of CO2, CO, and H2. The reformation chamber is used for steam reforming a remaining portion of the natural gas to generate additional hot gas mixture of CO2, CO, and H2. The hot gas mixture is directed through the channels installed in the first enclosure in which the water-gas-shift catalyst converts residual CO into additional CO2 and additional H2, to produce an output gas mixture of carbon dioxide and hydrogen. In the present invention, the first and second enclosures function as a top-to-bottom linear countercurrent heat exchanger. In one embodiment of the present invention, an external third enclosure containing a combustion chamber and a boiler for combusting natural gas with ambient air may be used to boil additional water into superheated steam which is then fed into the first enclosure.
Owner:PIONEER ENERGY

Natural gas steam reforming method with linear countercurrent heat exchanger

The present invention is a natural gas steam reforming method for generating an output gas mixture of carbon dioxide and hydrogen, including the following steps. (1) Combusting a portion of the natural gas with an oxidizing agent to generate heat, superheated steam, and a gas mixture of carbon dioxide, carbon monoxide, and hydrogen. (2) Steam reforming the gas mixture with additional superheated steam under steam-rich conditions to transform a remaining portion of the natural gas into carbon dioxide, carbon monoxide, and hydrogen. (3) Water-gas-shifting any residual carbon monoxide into additional carbon dioxide and additional hydrogen by utilizing a water-gas-shift catalyst downstream of the steam reforming step, thereby producing an effluent gas mixture that is predominantly carbon dioxide and hydrogen. (4) Boiling water in a top-to-bottom linear countercurrent heat exchanger to generate the superheated steam by transferring heat released in the water-gas-shifting step, where as the water is gravitationally and thermally stratified from top to bottom with a top portion boiling into steam, the steam continues to rise and is additionally heated in the top-to-bottom linear countercurrent heat exchanger. (5) And, utilizing the superheated steam produced as a reactant in the steam reforming step and the water-gas-shifting step to assist in reformation of the natural gas into carbon dioxide and hydrogen.
Owner:PIONEER ENERGY

Jacking and reinforcing method for buckling reinforced concrete column

The invention discloses a jacking and reinforcing method for a buckling reinforced concrete column. The method comprises the following steps: step one: manufacturing a steel bracket; step two: installing the steel bracket and a jacking device; step three: installing an unloading device; step four: arranging a laser range finder; step five: unloading the buckling reinforced concrete column; step six: jacking the buckling reinforced concrete column; step seven: chipping away a crushing area of the buckling reinforced concrete column and concrete near the area, and enabling a buckling reinforcedsteel bar to be exposed; step eight: welding a new reinforced steel bar at the edge side of the buckling reinforced steel bar; step nine: supporting and installing a template, preparing the high-strength fine aggregate concrete, and pouring a chipped area; step ten: restoring the reinforced concrete column; step eleven: implanting a new longitudinal bar and a spiral stirrup around the buckling reinforced concrete column after reinforced; and step twelve: restoring a frame beam and a floor. The reinforcing method is short in operation project period, rapid in efficacy, simple in construction process, and capable of realizing simple, efficient and economic repair to the buckling reinforced concrete column.
Owner:徐州市政建设集团有限责任公司

Method for preparing vat brilliant red RB

InactiveCN102453341ASafe restoreEnvironmental reductionAnthracene dyesBrilliant RedFluorescence
The invention relates to a method for preparing vat brilliant red RB (Algol Scarlet B), comprising the following steps: adding 3, 4, 9, 10-perylene tetracid dianhydride into KOH water solution and heating the solution to fully dissolve it, and cooling the solution to 50 degrees centigrade and neutralizing KOH in the solution by H2SO4 until the pH value equals to 5-6, and orange perylene tetra-formic acid is separated out; filtering and washing the perylene tetra-formic acid, and mixing a perylene tetra-formic acid filter cake with water, and adding parachloroaniline and pyridine into the solution, and uniformly stirring them, and transferring the material into a pressure kettle and closing the kettle, and raising the temperature to 130-150 degrees centigrade and performing heat preservation reaction until the perylene tetracid dianhydride is used up, wherein the reaction pressure is 0.2-0.4 MPa; cooling the material to the room temperature, and filtering it and washing it by hot water until no green fluorescence to obtain a vat brilliant red RB rough product filter cake, and heating and processing the rough product filter cake by sodium hypochlorite solution, and filtering, water washing and drying the cake to obtain a vat red RB dry product. The invention provides a safe, environment-friendly and economic preparation method.
Owner:上海华元实业有限公司

Method and device for remediating polluted sites of gas stations

The invention provides a repairing method and device for a gas station polluted site. The repairing method for the gas station polluted site comprises the steps that the polluted range of the gas station polluted site and concentration distribution of pollutants are determined; according to the soil gas phase extraction method, an extraction well and a ventilating well are laid, and an agent injection well is laid; soil gas phase extraction is conducted for fifteen days, an agent is injected into the agent injection well to react for 1-2 days, and after 2-3 days, soil gas phase extraction is continued; and the step (3) is repeatedly conducted till the pollutant concentration of the gas station polluted site is reduced to be 5%-10% of the original pollutant concentration, and repairing for the gas station polluted site is completed. The invention further discloses a repairing device for the gas station polluted site. According to the repairing method, the disadvantage that the pollutants with long carbon chains and high adsorbing performance cannot be treated through the soil gas phase extraction technology can be overcome; and meanwhile the problem that a chemical oxidizing agent preferentially reacts with the parsing-state pollutants with short carbon chains is solved, and agent waste is avoided.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
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