RU2012426C1 - Aerodynamic installation for the enrichment of dispersed materials - Google Patents

Abstract

FIELD: mining industry. SUBSTANCE: material enters booster pipe 3 in small amounts. By means of air flow the particles are displaced in the vortex flow. The vorticities are formed by conic rings 4. Then the material arrives into dynamic chamber 5 with deflecting shield 7. Large-sized particles knock against shield 7 and settle down in the lower part of the chamber getting rid of the dust. Small-sized particles are carried out of chamber 5 into set in-line bunkers 8 with shields 9 where they settle down too. Light particles are carried out into cylinder 10 by the aspiration system. EFFECT: simpler design of devices for the enrichment of loose materials. 4 dwg

Description

 The invention relates to installations for the enrichment of bulk materials in the energy, construction, mining and chemical industries, and can also be widely used in other sectors of the economy.

 A known device for drying, containing a drum with a nozzle, a loading hopper and an aspiration system (EPO patent N 0048520), a vibration dryer (ed. St. N 1416830), a device for enrichment of bulk materials containing a pneumatic supercharger with an accelerating tube and a dynamic chamber with a breaker shield .

 The disadvantages of these installations are: low quality enrichment, design complexity and ablation of the material.

 The closest in technical essence of the known is an aerodynamic installation.

 The disadvantages of the prototype are the complexity of the design and ablation of the material.

 The aim of the invention is to improve quality, increase productivity, reduce ablation and simplify the design.

 This goal is achieved by the fact that the dynamic chamber is connected by the outlet ventilation pipe to sequentially mounted bunkers containing vertical baffle plates with power cylinders, and the baffle plate of the dynamic chamber is made in the form of a disk with a cylindrical shell and power cylinders.

A significant difference of the proposed aerodynamic installation for the enrichment of dispersed materials from analogues and prototype is:
- the execution of the baffle shield of the dynamic camera moving horizontally;
- connection of the dynamic chamber with sequentially mounted bunkers equipped with baffle plates with power cylinders.

 In FIG. 1 schematically shows an aerodynamic installation, a longitudinal section; in FIG. 2 - node I in FIG. 1; in FIG. 3 is a section AA in FIG. 1; in FIG. 4 is a section BB in FIG. 1.

 An aerodynamic installation for the enrichment of dispersed materials, for example coal, powders, cement, sand, consists of a sequentially installed pneumatic blower 1 and a loading hopper 2 on the booster pipe 3, which is equipped with conical rings 4, creating smooth-narrowing sections, and introduced into the dynamic separation chamber 5. B the last one has a baffle plate 7 with a cylindrical shell 6. Behind the chamber 5, hoppers 8 are connected in series, which are connected to the suction system 11, and bunkers 8 are equipped with baffle plates 9 with fishing cylinders 10. The discharge pipes of the hoppers are connected to the booster pipe for unloading the enriched material containing a pneumatic blower.

 Aerodynamic installation for the enrichment of bulk materials is as follows.

= const происходит изменение скоростей и давлений, в результате чего происходит перечистка, измельчение частиц и удаление из них влаги подобно процессу в соплах Лаваля. После чего частицы материала влетают в динамическую камеру, где они ударяются об отбойный виброщит 7, рама 6 которого может горизонтально перемещаться силовыми цилиндрами 10, измельчаются и крупные частицы выпадают в основание динамической камеры. Более мелкие под действием скоростного потока, создаваемого аспирационной системой, обтекают отбойный щит и пролетают в последовательно установленные бункера 8, где частицы от периодического соударения об отбойные щиты 9 также измельчаются и очищаются. Часть частиц в зависимости от массы выпадает в основание бункеров 8, а аэрозоли материала поступают в аспирационную систему. После чего с помощью пневматической системы из пневмонагнетателя по разгонной трубе обогащенный сыпучий материал (очищенный, высушенный и измельченный) поступает потребителю. Процесс обогащения автоматизирован.Bulk material, such as cement, from the loading hopper 2 under the weight of its own mass is portioned into the booster pipe 3, where under the action of high-speed air flow from the pneumatic blower 2, the particles of material are picked up and moved as in a vortex system, which is created by conical rings 4, while according to the law Bernoulli P +

= const, there is a change in velocities and pressures, as a result of which the particles are cleaned, crushed, and moisture is removed from them, similar to the process in Laval nozzles. After that, the particles of material fly into the dynamic chamber, where they hit the breaker vibration shield 7, the frame 6 of which can be horizontally moved by the power cylinders 10, are crushed and large particles fall into the base of the dynamic chamber. Smaller ones, under the action of the high-speed flow created by the aspiration system, flow around the baffle plate and fly into successively installed bins 8, where particles from periodic impact on the baffle plates 9 are also crushed and cleaned. Part of the particles, depending on the mass, falls into the base of the bins 8, and the aerosols of the material enter the aspiration system. Then, with the help of a pneumatic system from the pneumatic blower, an enriched bulk material (cleaned, dried and ground) enters the consumer through an accelerating pipe. The enrichment process is automated.

 In comparison with domestic serial plants, for example ball mills, SMD-121 and others, as well as foreign ones, for example, Lone Star plants, Dean-Gross-Snyder plants (USA) and others, the proposed aerodynamic installation for the enrichment of dispersed materials is simpler , productive and can significantly improve quality.

The technical and economic efficiency of the aerodynamic installation for the enrichment of dispersed materials is as follows:
- quality improvement is ensured by the intensive impact of material particles on impacts, cleaning the particles in a high-speed air stream with rarefaction in the installation area of the conical rings, as a result of which the particles are destroyed, cleaned and both free and bound moisture are removed from them;
- increased productivity is achieved by increasing the speed of movement of bulk material throughout the process chain;
- simplification of the design is created by standardization of elements, the exclusion of complex mechanical parts from all installation systems;
- reduction of ablation is achieved through the use of sequentially installed bunkers equipped with movable baffle plates in height. (56) Copyright certificate N 1292628, cl. B 07 B 4/00, 1983.

 Copyright certificate N 1639778, cl. B 07 B 4/00, 1991.

Claims (1)

 AERODYNAMIC INSTALLATION FOR ENRICHING DISPERSED MATERIALS, including a sequentially installed pneumatic blower with an accelerating tube and a loading hopper, a dynamic chamber in communication with an aspiration system with a breaker shield, rings installed in the accelerating tube with variable and adjustable distances between them, characterized in that it is equipped with sequentially bunkers connected to the outlet vent pipe of the dynamic chamber with additional vertical baffles, made with the possibility of moving vertically by means of power cylinders, while the rings in the booster tube are made conical, and the baffle plate in the dynamic chamber is made in the form of a disk with a cylindrical shell and a power cylinder.

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