Chemical apparatus and process disinfecting – deodorizing – preser – Physical type apparatus – Crystallizer
Patent
1991-05-30
1994-09-06
Breneman, R. Bruce
Chemical apparatus and process disinfecting, deodorizing, preser
Physical type apparatus
Crystallizer
422253, B01D 904
Patent
active
053446186
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an improved crystal refining apparatus.
2. Prior Art
In the crystal refining apparatus of the prior art, for instance, disclosed in the Japanese laid open 87-244402 (Kokai Sho 62-244402), the amount of separated liquid containing impurities extracted from the refining column is dependent on the head difference between the inside and the outside of the refining column, so that the amount of separated liquid by extraction is limited to this extent. Accordingly, the value of the reflux ratio (defined as descending return flow rate inside the refining column /upflow rate of the solid crystal inside the refining column) can not be large enough and, consequently, it is very difficult to obtain highly refined crystal.
An objective of this invention, therefore, is to solve the afore mentioned defects of the conventional crystal refining apparatus and to provide a refining apparatus having a high reflux ratio (defined as descending return flow rate inside the refining column / upflow rate of the solid crystal inside the refining column) and capable of obtaining highly refined crystal.
Another objective of this invention is to provide a crystal refining apparatus which simultaneously can provide washing, sweating and recrystallization when needed, for obtaining highly refined crystals from crude crystals in a short period of time.
Upon further study of the specification and appended claims, further objectives and advantages of this invention will become apparent to those skilled in the art.
SUMMARY OF THE INVENTION
To attain these objectives, there is provided a crystal refining apparatus comprising a refining column including double shafts having screw blades provided therearound with the blades partly overlapping each other, the pitch of said screws are oppositely arranged to each other and they rotate in opposite directions to each other so that they carry solid contents upwardly inside an said refining column. The apparatus further comprises:
a crude material inlet disposed at said refining column;
a refined crystal outlet disposed at upper part of said refining column;
a separated liquid extraction chamber disposed at one side of the refining column where the rotating blades meet together and which receives the separated liquid containing impurities from a solid-liquid separation plate consisting of a plate having a plurality of apertures or a net-like plate through which separated liquid flows down thereto; and/or a separated liquid extraction chamber disposed at the bottom of the refining column and which receives the separated liquid containing impurities from a solid-liquid separation plate consisting of a plate having a plurality of apertures or net-like plate through which separated liquid flows down to said separated liquid extraction chamber; and a pressure reduction line connected to said separated liquid extraction chamber.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is an elevation and a schematic section view of the refining apparatus of this invention.
FIG. 2 is an overview and which is a schematic section view of the refining apparatus.
FIG. 3 is a side elevation schematic section view of the refining apparatus.
FIG. 4 is schematic view of a separated liquid extraction system.
DETAILED DESCRIPTION OF THE INVENTION
This invention is more specifically explained by the embodiment of this invention shown in the figures attached to the specification.
Referring to FIGS. 1 to 4, it is seen that a refining column 1 of the crystal refining apparatus consists of two vertical cylinders which form, for instance, a cocoon-like shape, and two parallel driving shafts 3,3' disposed inside said cylinders which are driven by a driving unit 2 disposed at the top of said refining column 1. Screw blades 4,4' are disposed around said shafts 3,3' and arranged such that they partly overlap each other and the pitch of each screw blade is made to be opposite to each other. Screw blades 4,4' are rotated by said driving unit 2 in opposite dire
REFERENCES:
patent: 2731456 (1956-01-01), Weedman
patent: 3305320 (1967-02-01), Weech
patent: 4588562 (1986-05-01), Saitoh et al.
patent: 4623372 (1986-11-01), Adler et al.
patent: 4632809 (1986-12-01), Otto et al.
patent: 4806318 (1989-02-01), Saitoh et al.
Breneman R. Bruce
Garrett Felisa
LandOfFree
Crystal refining apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crystal refining apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crystal refining apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1328154