SU511965A1 - Phosphoric Acid Reactor - Google Patents

Description

This invention relates to chemical industry ;; and. can find application in the apparatus for the production of phosphoric acid. A known reactor for the production of phosphoric acid is a cylindrical apparatus with a stirrer and nozzles for spraying sulfuric acid. However, such a reactor eliminates the possibility of carrying out a single-stage process for the decomposition of phosphate raw material with a mixture of seric and phosphoric acid under optimal conditions for the decomposition and crystallization of calcium sulfate, as well as the local output of gaseous fluorine compounds during processing, since it does not provide for the possibility of entering phosphate raw materials into powder-like form in the reaction mass. In order to intensify the process, the proposed reactor is equipped with a Cilidro-Cocoic charging device installed G5 vertically, so that its lower part is buried in the reaction chamber and is at the level of displacing structures, and in the upper part tangentially and at an angle to the longitudinal axis of the device is located input return P LPY. 5 10 15 20 25 30 Coprah reactor is shown in the drawing. The vessel 1 of the reactor is a cylindrical vessel, into which, through sealing glands 2, the mixing devices 3 are inserted, consisting of tubes of spraying equipment. Between displacing devices with a mounting device 4 for the introduction of phosphate raw material into the reaction mass, which is a cylindrical-conical tube with extensions from top to bottom, recessed into the reaction mass, on top of which is mounted a screw 5 for the introduction of phosphate raw materials; In the upper conical part of the tapgeic and nak.tonno to the longitudinal axis is set shtutser 6 for the introduction of cystic circulatory pulp. In addition, devices 7 for introducing a mixture of concentrated 93-98% sulfuric acid and circulating phosphoric acid, which are the nozzles buried in the reaction slurry up to the upper turbine russia, are mounted into the reactor vessel. The reactor has fittings for entering the “hot water vapor 8” and for the removal of water vapor and gaseous fluoride compounds 9, as well as the pulp pump Yu, which provides for the output of the production slurry to filter the circulating slurry.

The device works as follows.

Phosphate raw material is introduced into the body through the nozzle 5, located at the top of the loading device, which is simultaneously a hydraulic gate. In order to exclude the clogging of the charging device by the phosphate raw material, a circulating pulp is fed into the tangential mixer, forming a constantly renewing surface.

The phosphate feedstock feed unit continuously enters the lower part of the reactor, where it is displaced by means of transferring devices with a reaction mass into which sulfuric and reverse phosphoric acid is continuously introduced.

The reaction slurry is continuously withdrawn by the pulp pump 10, and the water vapor and the fluoride gas are discharged through the clamp 9.

During the process, a reduced pressure is maintained in the reactor.

Claims (1)

Invention Formula A phosphoric acid reactor containing a cylindrical body equipped with a turbine displacing device, nozzles for introducing pulp and sulfuric acid, and a nozzle for withdrawing the reaction pulp, characterized in that, in order to intensify the process, the reactor is provided with a cylinder-conical charging device installed vertically , the lower part of which is at the level of the turbine of the mixing device, and in the upper part of the tangentially and at an angle to the longitudinal axis is located the nozzle of the return pulp.