Agitating – Having specified feed means – Material introduced so as to cause rotary motion in mixing...
Patent
1995-03-14
1997-01-07
Jenkins, Robert W.
Agitating
Having specified feed means
Material introduced so as to cause rotary motion in mixing...
3661814, 366317, 366304, B01F 716
Patent
active
055909612
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method of injecting a first fluid into a second fluid, whereby in an injection apparatus having a substantially disc-shaped rotor, a radial displacement effect is imparted to the second fluid from a central product inlet to a peripheral product outlet, said first fluid being injected into an annular injection chamber above the disc-shaped rotor displaced form both said inlet and said outlet, in which chamber the second fluid is exposed to a tangential dispersion effect in addition to said displacement effect.
Without in any manner being restricted thereto, the method according to the invention has substantial fields of application in, partly, heat treatment of liquids by injection of steam, for example bactericidal UHT treatment of milk products or pregelatinization of starch products, partly injection of gases, for example CO.sub.2 or nitrogen into such liquids which are subsequently to be spray dried with the aim of reducing the density of a powder product obtained by the spray drying, partly injection of a liquid, for example water, into certain fatty or oily products with a view to reduction of the fat content.
In connection with the spray drying of food products, for example milk products or fruit juice, it is known from U.S. Pat. Nos. 3,185,580 and 3,222,193 to make an injection of a gas directly into an elongated mixing pipe through which the liquid starting material flows before supply to an atomizer in the spray drying apparatus. This type of gas injection is not suitable for heat treatment at higher temperatures, as it will inevitably lead to burning. Actually, the above patents also direct that a heat treatment of the product, for example for pasteurization purposes, be made in a conventional preheater.
U.S. Pat. No. 3,182,975 describes an apparatus for heat treatment of milk products at an increased temperature after a prior preheating by injection of steam into a mixing chamber to which the product to be treated is supplied. Steam injection is carried out by means of a propeller-like rotor with perforated tubular blades where the steam extravasates on the back of the rotor blades seen in the direction of rotation at a relatively low pressure, whereby the pressure is increased through the mechanical influence from the rotation of the rotor. The intention is to obtain a rapid heating without burning.
SU patent specification No. 578046 describes another method of heat treatment of milk products where the product is also supplied to a mixing chamber by a propeller-like rotor, but here the steam supply is made via a distributor system with annular distributing conduits arranged concentrically in relation to the rotor and controlled by means of a valve arrangement so that the steam in the central area of the chamber is supplied at a relatively low temperature and pressure, and in the peripheral area at a substantially increased temperature and pressure. The intention is to obtain a very rapid heating to sterilization level after a preheating in the central area. In this construction, however, the strong heat influence at the periphery involves a considerable risk of burning.
It is known from U.S. patent specification No. 4,479,908 to make an injection of gas into a fluid product of a higher density by a method in which a strong turbulence and high flow velocity are imparted to the fluid product by passing it through a conduit part with a curved wall in connection with a constricted flow section where the gas injection takes place through an adjustable nozzle. According to the patent, the method may also be used for heat treatment of milk products by injection of steam at a temperature of about 170.degree. C.
CH patent specification No. 531363 describes an apparatus for mixing a liquid raw material with a gas, for example with a view to foaming, whereby the mixing takes place in a mixing chamber by means of a rotor disc with projecting teeth moving between stationary teeth in a surrounding stator part, the rotor disc performing an eccentric circulatory movement about the ax
REFERENCES:
patent: 1711154 (1929-04-01), Michal
patent: 3744763 (1973-07-01), Schnoring
patent: 3998433 (1976-12-01), Iwako
patent: 4332486 (1982-06-01), Mutalibov
Jenkins Robert W.
Niro Holding A/S
LandOfFree
Method for injecting a first fluid into a second fluid and an ap does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for injecting a first fluid into a second fluid and an ap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for injecting a first fluid into a second fluid and an ap will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1759477