RU19481U1 - DEVICE FOR PROCESSING VISCOUS PRODUCTS - Google Patents

Description

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DEVICE FOR PROCESSING VISCOUS PRODUCTS

The utility model relates to the processing technology of predominantly viscous, pasty and clumping food products, namely, devices for mixing ingredients with their simultaneous transformation and can be used in chemical, food and other industries.

Known aggregates for mixing komponeng (Aut. St. USSR No. 1669522, 1991, class B01F 7/08; Aut. St. USSR No. 1725998,1992, class B01F 7/08; Aut. St. USSR No. 1472108,1989, CL B01F 7/08), which are a housing with loading and unloading holes and a screw or screws installed in it, made in the form of shafts with nozzles and a drive, and differing in the form of nozzles, the presence of slots in the screw or the filling of the screw from several different in form and speed of rotation of the elements.

The disadvantage of these mixers is the formation at high adhesive ability of the dried material on the shaft body of local stagnant zones in which the product dries and forms a crust. This leads to a change in the shape of the nozzles and, as a result, to a decrease in the mixing efficiency of the material.

Closest to the claimed device is a unit for mixing and drying products (US Pat. Germany No. 3741654.1987, CL B01J 19/18), consisting of a housing in which there are two shafts with blades and scrapers, which are in gear with each other . The coolant is supplied inside the shafts and blades. The shafts rotate in opposite directions, the speeds of rotation of the shafts are the same.

The disadvantage of this device is the presence in the mixer of local stagnant zones in which the product dries and forms a crust. During the rotation of the shafts, the cleaning and moving elements of one shaft pass with a small gap through the zone bounded on both sides by the elements of the adjacent shaft, which leads to jamming of the machine.

MKl. BOIF 7/08

The problem solved by the authors was to create a device that ensures reliable operation with highly adhesive materials.

To solve this problem, a device diagram was developed allowing you to practically eliminate the possibility of crust formation in the mixer by minimizing the processes leading to the formation of a crust, namely, by practically eliminating the crystallization centers of the mixed material. For this, the mixing processes in the unit are supplemented by the processes of abrasion of the mixed mass, during which the crystallization nuclei are eliminated, which leads to a uniform flowing finely dispersed mass, as well as its additional turbolization.

The technically posed problem is solved by creating a device for mixing material, consisting of a housing in which rotating shafts are located with blades made in the form of cutters located on the shaft at the same distance, and on each shaft they are installed so that they approach lateral surfaces during rotation incisors and the body of the adjacent shaft is asymmetric with respect to the intercavity distance. The cutters of one shaft can be offset in diameter with respect to the neighboring cutters of this shaft by an amount equal to or greater than the angle of the arc of a circle occupied by the base of the cutter on the shaft.

The general scheme of the device (side view) is presented in Fig. 1; in Fig. 2, section A-A in Fig. 3, section B-B in two versions (Option 1 and Option 2).

It contains an axisymmetric case of a rectangular shape with a bottom 1 in the form of several adjoining cylindrical cylindrical parts. The shafts 2 are located perpendicular to the axis of the apparatus and have cutters distributed on their outer diameter 3. The walls of the housing 4, 5 are lined with fluoroplastic 6. A distribution comb 8 is installed in the housing 7 of the apparatus, into which coolant (coolant) is supplied through the nozzle 9. The output of the spent heat sigel is carried out through the fitting 10, also installed in the housing of the apparatus. Loading of the product is through the hopper 11, unloading is through the hatch 12 located under the last roll. Additionally, the device is equipped with a drive, not indicated in the drawing.

The device operates as follows.

The initial u) product is fed into the loading hopper, from where it enters the first shaft of the apparatus. The shafts 2 are rotated in rotation and provide mixing of the product, as well as its movement along the axis of the device. The cutters 3 on each shaft 2 are installed in such a way that they approach a distance of 0.1-0.5 mm to the side surfaces of the cutter and the body of the adjacent shaft during rotation, whereby the cutters of one shaft are offset in diameter relative to the neighboring cutters of this shaft by an amount equal to or greater than the angle of the arc of a circle occupied by the base of the cutter on the shaft. Each cutter cleans only one side of the cutter mounted on an adjacent shaft. At the same time, the supplied product in the hzstranstvo, formed by the cutters and the bodies of the shaft is worn out, which leads to the disappearance of crystalline nuclei of crystallization processes and is ejected with further rotation of the shaft into the body space, ensuring the emergence of turbulent flows, improving mixing and minimizing the volume of stagnant zones. This allows you to ensure reliable operation of the device and prevent it from jamming when working with a highly adhesive product.

The effect is enhanced in case of rotation of adjacent shafts at different speeds. The direction of rotation of adjacent shafts depends on the properties of the processed product. For example, when drying products with a large diffusion resistance to moisture transfer, all even-numbered rolls can rotate in the opposite direction (Fig. 3, Option 1). In this case, they perform the function of delaying the product and increase its residence time in the apparatus. On the contrary, when drying products with low diffusion resistance, moisture transfer, the necessary residence time is reduced, then all the rolls grow in one direction and contribute to faster mixing of the product along the apparatus (Fig. 3 Option 2). The coolant (coolant) is supplied through a distribution comb installed above the rolls along the entire length of the apparatus and is distributed by jets, providing effective convective heat transfer. Mixing and grinding the product allows you to constantly update the heat transfer surface, which, in turn, dramatically sows the time spent on drying.

Claims (6)

1. A device for processing viscous products, comprising a housing in which there are shafts with blades distributed on their outer diameter that are engaged with each other, characterized in that the blades are made in the form of cutters, the cutters of one shaft are evenly spaced on the shaft at a distance from each other from each other, and on each shaft they are installed so that during rotation to the body of the adjacent shaft is asymmetric in relation to the distance between the cutters.  2. The device according to claim 1, characterized in that each cutter of one of the shafts is suitable at a distance of 0.1-0.5 mm to the side surface of the cutter of the other shaft and the surface of the shaft.  3. The device according to claim 1, characterized in that the cutters of one shaft are offset in diameter with respect to adjacent cutters of this shaft by an amount equal to or greater than the angle of the arc of a circle occupied by the cutter base on the shaft.  4. The device according to claim 1, characterized in that any two adjacent shafts rotate in different directions.  5. The device according to claim 1, characterized in that any two adjacent shafts rotate in the same direction. 6. The device according to claim 1, characterized in that the coolant or refrigerant is supplied to the processed product by means of a distribution comb installed above the rolls, and the output is through a fitting that is installed in the feed zone of the initial product.