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267results about How to "Save energy consumption" patented technology

Flue gas-treating method and apparatus for treating acidic tail gas by using ammonia process

ActiveUS9370745B2Improve desulfurization efficiencyEffectively control the ammonia slip and the aerosol generationGas treatmentDispersed particle separationFlue gasAmmonia storage
A flue gas-treating method for treating acid tail gas by using an ammonia process, comprising the following steps of: 1) controlling the concentration of sulfur dioxide in an acid tail gas entering an absorber to be ≦30,000 mg / Nm3; 2) spraying and cooling with a process water or / and an ammonium sulfate solution in the inlet duct of the absorber or inside the absorber; 3) providing an oxidation section in the absorber, wherein the oxidation section is provided with oxidation distributors for oxidizing the desulfurization absorption solution; 4) providing an absorption section in the absorber wherein the absorption section achieves desulfurization spray absorption by using absorption solution distributors via an absorption solution containing ammonia; the absorption solution containing ammonia is supplied by an ammonia storage tank; 5) providing a water washing layer above the absorption section in the absorber, wherein the water washing layer washes the absorption solution in the tail gas to reduce the slip of the absorption solution; 6) providing a demister above the water washing layer inside the absorber to control the concentration of mist droplets contained in the cleaned tail gas. In the coal chemical industry, the integration of the Claus sulfur recovery process and the ammonia desulfurization technology can reduce the investment of the post-treatment and simplify the operation process, and provide intensive advantages to the environmental control of plants.
Owner:JIANGNAN ENVIRONMENTAL PROTECTION GRP INC

Method for producing hot-rolled pickling-free plate by combining thin-strip continuous casting with reducing annealing

The invention belongs to the technical field of material metallurgy, and particularly relates to a method for producing a hot-rolled pickling-free plate by combining thin-strip continuous casting with reducing annealing. The method specifically includes the steps: obtaining refining molten steel, preparing a cast-rolling strip blank, uncoiling a cast-rolling thin strip after thermal leveling for reducing annealing, removing scale on the surface of the cast-rolling thin strip in a reduction section, and adopting H2 atmosphere condition to protect reduction, wherein reduction temperature is 800-1100 DEG C and reduction time is 10-30min; adopting H2 and N2 atmosphere for protection in a high-temperature annealing section, wherein reduction temperature is 500-1000 DEG C and reduction time is 1-5min, realizing texture and performance control of the thin strip, and obtaining a thin-strip steel product. By the technical scheme, the cast-rolling thin strip is free of pickling and is directly subjected to reducing annealing, so that cold-rolled pickling process is omitted, pre-oxidation process before continuous annealing can be completely abolished, continuity of thin strip production process can be greatly improved, production efficiency is improved, production cost is lowered, discharging of pollutants like waste acid is reduced, and great economic benefit and social benefit are created.
Owner:NORTHEASTERN UNIV LIAONING
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