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56results about How to "To achieve the purpose of thickening" patented technology

Method for preparing magnesium nitrate solution by using nitric acid tail gas and apparatus thereof

The invention provides a method for preparing a magnesium nitrate solution by using nitric acid tail gas, which comprises the following steps: respectively injecting nitric acid tail gas after being washed by a washing tower and water on magnesium oxide surface to form a solution; uniformly introducing compressed air and then stirring to generate the magnesium nitrate solution; filtering the magnesium nitrate solution and then introducing in the washing tower and repeatedly generating the magnesium nitrate solution to increase its concentration; deposing for 8-10 hours, and filtering to obtain the finished product magnesium nitrate solution. The invention also provides an apparatus. According to the invention, a non-pressure process and a pressurization method are used for producing dilute nitric acid, tail gas generated by dilute nitric acid contains a lot of nitrogen oxides such as NO and NO2, the nitrogen oxides are washed by the washing tower to remove the impurities, and then added in magnesium oxide with water and compressed air, so that nitrogen oxides, water, and alkalescence suspending liquid prepared by oxygen and magnesium oxide are reacted to directly generate the magnesium nitrate solution. According to the invention, reaction is mild, acid mist and nitrogen oxides are not generated, so that personal safety is ensured and environment can not be polluted, and magnesium nitrate concentration can be gradually increased to 40%.
Owner:宁夏润夏能源化工有限公司

Preparation method and device for producing calcium nitrate liquor by nitrification gas

InactiveCN103803624AHigh utilization of NOEnergy saving and environmental protection production costCalcium/strontium/barium nitratesProduct gasOxygen enrichment
The invention provides a preparation method and a device for producing calcium nitrate liquor by a nitrification gas. The preparation method comprises the following steps: carrying a reaction on the nitrification gas and cooling water to generate dilute nitric acid; carrying out a reaction on dilute nitric acid and quick lime to generate calcium nitrate liquor; after filtering and cooling the calcium nitrate liquor, repeating the previous two steps to improve the concentration of the calcium nitrate liquor till the nitrification gas reacts completely; stirring the calcium nitrate liquor and adjusting pH value of the calcium nitrate liquor; and settling and filtering to obtain the product calcium nitrate liquor. According to the invention, by fully utilizing the characteristic that the nitrification gas of a constant pressure pressurizing dilute nitric acid production device contains NOX gases, NOX gases and water are reacted to generate dilute nitric acid under a condition of oxygen enrichment, and the dilute nitric acid and quick lime (CaO) are in acid-base reaction to generate the calcium nitrate liquor. The reaction is mild without acid mist and acid mist which are harmful to personal safety and pollute the environment.
Owner:ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH

A method and device for preparing magnesium nitrate solution using nitric acid tail gas

The invention provides a method for preparing a magnesium nitrate solution by using nitric acid tail gas, which comprises the following steps: respectively injecting nitric acid tail gas after being washed by a washing tower and water on magnesium oxide surface to form a solution; uniformly introducing compressed air and then stirring to generate the magnesium nitrate solution; filtering the magnesium nitrate solution and then introducing in the washing tower and repeatedly generating the magnesium nitrate solution to increase its concentration; deposing for 8-10 hours, and filtering to obtain the finished product magnesium nitrate solution. The invention also provides an apparatus. According to the invention, a non-pressure process and a pressurization method are used for producing dilute nitric acid, tail gas generated by dilute nitric acid contains a lot of nitrogen oxides such as NO and NO2, the nitrogen oxides are washed by the washing tower to remove the impurities, and then added in magnesium oxide with water and compressed air, so that nitrogen oxides, water, and alkalescence suspending liquid prepared by oxygen and magnesium oxide are reacted to directly generate the magnesium nitrate solution. According to the invention, reaction is mild, acid mist and nitrogen oxides are not generated, so that personal safety is ensured and environment can not be polluted, and magnesium nitrate concentration can be gradually increased to 40%.
Owner:宁夏润夏能源化工有限公司

Knife back forming machine

The invention discloses a knife back forming machine, which comprises an upper die, a lower die, a fixed side die, a movable side die, a main hydraulic device and an auxiliary hydraulic device, wherein the main hydraulic device and the auxiliary hydraulic device are fixed on a base; the upper die is fixed on a plunger end of the main hydraulic device; the bottom shape of the upper die is adaptive to the shape required by the top of the knife back; the lower die is fixed on the base; a knife edge slot used for fixing a knife is arranged above the lower die; the fixed side die is fixed on the base; the movable side die is fixed on a plunger end of the auxiliary hydraulic device; and the combined shape of the opposite surfaces of the fixed side die and the movable side die is adaptive to the required shaped by the cross section of the knife. According to the knife back forming machine disclosed by the invention, a purpose of thickening the knife back can be realized, and the knife back forming machine is regular and beautiful in forming. When the knife back forming machine disclosed by the invention is adopted, the knife back of the knife can be processed within 10 seconds, no coal needs to be fired, the energy is saved, the environment is protected, the production efficiency is improved, the labor intensity is lowered, and the production cost is lowered.
Owner:嘉禾县刀王刀具有限公司
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