2 results about "Nitrogen tetroxide" patented technology

The invention discloses a production process and device for preparing liquid nitrogen tetroxide by recycling nitric oxide. Nitrogen oxides in the tail gas are respectively absorbed by water and alkali liquor to prepare a nitric acid solution and a sodium nitrate-nitrous acid solution; a dilute nitric acid solution and a sodium nitrate and nitrite solution are respectively stored and then mixed to enter a nitric oxide generation tower for reaction to generate nitric oxide gas and a sodium nitrate aqueous solution. The nitric oxide gas is lightly oxidized by using oxygen in the nitric oxide generation tower, then enters the oxidation absorption tower and is heavily oxidized by using concentrated nitric acid, so that the nitric oxide gas is completely converted into nitrogen dioxide gas, and the concentrated nitric acid is used for absorption at the upper section of the oxidation absorption tower to form fuming nitric acid. Fuming nitric acid is heated by steam, and liquid nitrogen tetroxide is produced after condensation. The non-condensable gas contains a small amount of nitrogen oxides, and then passes through a denitration device. By adopting the device and the process, the nitrogen oxide in the recovered waste gas can be effectively ensured to be prepared into liquid nitrogen tetroxide, and the content of the nitrogen oxide in the waste gas outlet is reduced.

The utility model belongs to liquid propellant analysis equipment technical field discloses a nitrogen tetroxide chlorine content test pretreatment device to solve the prior art problems, the device includes the test bench, is sequentially provided with nitrogen tetroxide treatment bottle, first absorption bottle, second absorption bottle on the test bench, the bottom of first absorption bottle and second absorption bottle is equipped with the delivery pipe, the nitrogen tetroxide treatment bottle, first absorption bottle and second absorption bottle all are equipped with the plug-in bottom pipe in, the plug-in bottom pipe is installed with the central gas tube, a plurality of spray pipes are installed on the plug-in bottom pipe, the bottom fixed mounting of plug-in bottom pipe is connected with the porous wave plate bubble ware of central gas tube, the utility model can be washed before pretreatment test, the central gas tube of plug-in bottom pipe is used as the gas path channel, and the bottom is provided with the porous wave plate bubble ware, and this design can make the gas dispersion into small bubbles, increase the contact area of gas and liquid in cavity, improve the reaction efficiency.