RU2080165C1 - Apparatus for disintegration and mixing of suspensions - Google Patents

Abstract

FIELD: chemical engineering. SUBSTANCE: apparatus contains cylindrical grinding chamber with inlet fittings for suspension and outlet one for final product. Cylindrical surface of chamber bears longitudinal slots forming oppositely directed nozzles. Before each of them, there is a series of plates forming with wall of grinding chamber additional oppositely directed slot nozzles. Grinding chamber is provided with at least one additional series of plates positioned behind the first series of plates in such a way that each plate from additional series may be inserted between first-series plates. Plates of both series are double-convex in their cross-sections. Transition regions where grinding chamber transforms into suspension inlet fittings are arc-shaped wherein bulb is facing inward the chamber. EFFECT: improved structure. 2 dwg

Description

 The invention relates to a device for jet grinding and mixing suspensions and may find application in mining, chemical, construction and other industries.

 A device for grinding and mixing materials containing a cylindrical grinding chamber with several radially opposing directional nozzles and an axial nozzle for outputting the finished material (Akunov A.I. Inkjet mills. Engineering. 1967, pp. 104-105).

 The disadvantage of this device is the low grinding efficiency due to energy losses by material particles resulting from the collision of the jets.

 Closest to the proposed invention, the technical solution is a device for grinding and mixing suspensions, containing a cylindrical grinding chamber with several radially opposing nozzles, the outlet openings of which are made in the form of longitudinal slots on the cylindrical surface of the grinding chamber, in front of each of which an arched profile plate is mounted, forming additional oppositely directed slotted nozzles with the chamber walls, and an axial pipe for outputting the finished ma Methods and material.

 The disadvantage of this device is the low efficiency of using the kinetic energy of the slurry jets due to only two-stage grinding of the suspension and the asymmetry of the counter-directed slurry jets in the cylindrical grinding chamber (the jets from the horizontal nozzles do not intersect at the center of the cylindrical grinding chamber, but closer to the walls, "cutting "jets coming from vertical nozzles, which reduces the efficiency of grinding and mixing suspensions).

 The purpose of the invention is improving the efficiency of grinding and mixing suspensions.

 This goal is achieved by the fact that in the known device for grinding and mixing suspensions containing a cylindrical grinding chamber with nozzles for supplying a suspension and a nozzle for outputting the finished product and with radial opposing nozzles made in the form of longitudinal slots on the cylindrical surface of the grinding chamber, each of which a series of plates is mounted, forming additional counter-directional slotted nozzles with the wall of the grinding chamber, the grinding chamber is provided with at least one additional row of plates located behind the first row of plates with the possibility of placing each plate of an additional row between the plates of the first row, while the plates of both rows are biconvex in cross section, the transition sections of the grinding chamber into nozzles for supplying the suspension are arcuate, convex inside the chamber .

 Depending on the degree of grinding in the device, several rows of plates can be installed in series, forming additional counter-directional nozzles. The number of nozzles for supplying the suspension is equal to the number of radial counter-directed nozzles of the cylindrical grinding chamber.

 In the proposed design, due to the increase in the number of counter-directional collisions of the jets, the location of the plates and their form of execution, as well as the implementation of the section of the transition of the grinding chamber into nozzles for supplying the suspension, ensuring the symmetry of the jets, the degree of grinding and homogenization of the finished (finely ground) suspension increases.

 Figure 1 presents a device for grinding and mixing suspensions; figure 2 section aa in figure 1.

 The device comprises a cylindrical grinding chamber 1 with slotted longitudinal nozzles 2, a cover 3, nozzles 4 for supplying a suspension and a nozzle 5 for outputting the finished product. In front of each nozzle 2 there is a row of plates 6, forming additional counter-directional slotted nozzles 7 with the wall of the grinding chamber 1. At least one more row of plates 8 is installed behind the first row of plates 6 with the possibility of placing each plate 7 between the plates 6. Plates 6 and 8 are mounted on the cover 3 with the possibility of radial movement to regulate the orifice of the slot nozzles. Plates 6 and 8 are biconvex in cross section. Between the rows of plates 6 and 8, another additional row of slot nozzles 9 is formed.

 The sections of the transition 10 of the grinding chamber 1 into the nozzles for supplying the suspension 4 are made of an arcuate shape, convex inside the chamber 1. Between a number of plates 8 and the transition section 10, a third row of slotted pair nozzles 11 is formed. An inspection glass 12 is mounted in the cover 3 to monitor the operation mode devices and position control plates 6 and 8.

 The device operates as follows.

 The suspension to be crushed is introduced under pressure through nozzles 4 into the nozzle apparatus and sequentially passes through paired nozzles 11, 9 and 7, 2. When products enter the additional nozzles, the velocity of the suspension flows increases, and at the moment the jets exit the nozzles, sharp decrease in pressure. Gas is released from the suspension, additionally accelerates portions of the latter, which collide with each other in oncoming flows, as a result of which grinding and mixing are carried out in the grinding chamber 1.

 The number of passable slurry nozzle suspensions can be increased both by increasing the number of layers of biconvex plates, and by increasing the number of inlet pipes. Their optimal number is determined experimentally.

 The finished product is unloaded from the pipe 6.

 Thus, the proposed device allows to intensify the process of grinding and mixing, is new in comparison with similar devices and industrially applicable.

Claims (1)

 A device for grinding and mixing suspensions containing a cylindrical grinding chamber with nozzles for supplying a suspension and a nozzle for outputting the finished product and with radial opposing nozzles made in the form of longitudinal slots on the cylindrical surface of the grinding chamber, in front of each of which a series of plates forming with a wall are mounted grinding chamber additional counter-directional slotted nozzles, characterized in that the grinding chamber is equipped with at least one additional row of pla stins located behind the first row of plates with the possibility of placing each plate of an additional row between the plates of the first row, while the plates of both rows are biconvex in cross section, the transition sections of the grinding chamber into nozzles for supplying the suspension are arcuate in shape, convex inside the chamber, and the number pipes for supplying suspensions is equal to the number of radially opposing nozzles of the cylindrical grinding chamber.

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