Concentrating evaporators – Spray type – Gaseous current
Patent
1984-11-20
1986-06-03
Bascomb, Wilbur
Concentrating evaporators
Spray type
Gaseous current
159 3, 159 407, 159 481, 202236, 239558, 239565, 423305, B01D 118, C01B 2530
Patent
active
045928037
ABSTRACT:
The disclosure relates to a process for making alkali metal phosphates, especially alkali metal polyphosphates, from alkali metal phosphate solutions or suspensions. To this end the solutions or suspensions are forced to flow through a plurality of single opening nozzle structures under a pressure of 6 to 66 bars and sprayed inside a tower through a flame zone produced by a plurality of burners arranged in annular fashion. The disclosure also relates to a device for carrying out the process, wherein a cylindrical spray tower (1) having a tapered lower end and being closed by means of a cover (2) has a solvent feed pipe (5) terminating in a spray means (6) centrally passed through the cover, and wherein a plurality of burners is passed through the cover (2), concentrically around the solvent feed pipe (5). The spray means (6) is comprised of a feed pipe (15) and at least one spray head (12), which has a plurality of single opening nozzle structures (17) disposed in its terminal surface area (13). At least one pressure-increasing pump ( 7) is disposed in the solvent feed pipe (5).
REFERENCES:
patent: 2471035 (1949-05-01), Hurd
patent: 2599067 (1952-06-01), Otto
patent: 3023083 (1962-02-01), Rodis et al.
patent: 3083099 (1963-03-01), Swanson et al.
patent: 3130225 (1964-04-01), Friend
patent: 3252501 (1966-05-01), Loebel et al.
patent: 3434522 (1969-03-01), Laurenty
patent: 3557864 (1971-01-01), Berg
patent: 3562768 (1971-02-01), Edquist et al.
Damman Ben
de Witte Paul
Drijver Jan
Kinneging Hans
Scheffer Hans
Bascomb Wilbur
Hoechst Aktiengesellschaft
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