SU981802A1 - Apparatus for charging burden onto sintering machine - Google Patents

Description

(5) DEVICE FOR DOWNLOADING THE DYEHOUSE ON ANGLOMERATION MACHINE

The invention relates to agglomeration tfiauMHaM with a belt grate and can be used in the metallurgical and chemical industries and in the building materials industry to load the charge into the grate. The layer structure of the initial charge on the pallets of the sintering machine is formed when it is loaded and has a significant impact on the sintering process. Re-compaction of the charge during loading leads to a decrease in gas permeability of the layer and, consequently, to a deterioration in the sintering process. Therefore, certain requirements are imposed on the design of the loading device, such as, for example, the distribution of the polymeric material of the charge by size, the increase in the fuel content in the upper part of the layer, the compaction of the areas of the layer that are perilarial across the width of the pallet to reduce the airborne discharge, and the load on the load the width of the pallet over a wide range of changes in its moisture and size. A sintering machine loading device is known, consisting of a bunker with a drum installed under it and a guide tray in which windows with slide valves are made in the back wall of the bunker, and under. they additionally installed trays in the direction of the sides of the sintering carts. By creating slopes from the small charge at the sides of the pallet, in the said device the side air suction til is reduced. The disadvantages of the known device are the low degree of separation of their aids by the material and particle size composition, and the compaction of the charge by the drum feeder due to its design features. 39 The closest to the invention according to the technical essence and the achieved result is a loading device, including a series-arranged hopper, a feeder and an inclined tray with a device installed at the lower end of the tray to size the material by size. The device is made in the form of a pneumatic chute, having a bottom, face, side walls and a gas distribution peijeTKy installed between them, consisting of three rigidly connected sections: the first is solid, adjacent to the end wall and installed with a slope to the bottom of the pop angle - (5 °, the second one - with blow holes, located parallel to the bottom of the pneumatic chute, and the third one also with blow holes, connected to the bottom with its bottom end under the yoke of 20-50. Tray protrudes under the sides of the pallet, and the pneumatic tray is installed on the shock absorbers and connected to the vibrator. The feed material, falling on the gas distribution grid of the pneumatic tray, undergoes fluidization under the influence of the ascending air toTOfca and due to the yield thus obtained, moves to the discharge end pneumatic tray C 2. The indicated device works well on (Blending normal humidity with a maximum size of lumps of your 2P-30 mm. However, under the conditions of continuous operation of the device on the sintering machine, there are moments when an overplaced charge enters the lattice of the pneumatic tray, containing large (50-100 mm) pieces of sintered material. Under these conditions, a partial bedding of the material on the surface of the second (horizontal) section occurs, the holes in the grating are blocked by the charge, a violation of the uniform movement of the material along it and, as a result, the quality of the formed layer decreases. In addition, the drawbacks of the device under consideration should include significant airborne air inflow in the sinter charge mixture placed on pallets. The aim of the invention is to increase the efficiency and reliability of the loading device. This goal is achieved in that the device for loading the charge on the sintering machine, which includes a hopper, a feeder with an inclined tray and a pneumatic tray with a bottom, end, side walls and a gas distribution grid, consisting of three sequentially and rigidly connected sections, of which and the third is installed with a slope to the bottom, the loading end of the pneumatic tray, adjacent to the lower end of the inclined feeder tray, is 0.7-0.95 wide in width of the latter, and the second gas distribution section The lattice is installed at an angle to the bottom, with the side walls (and the pneumatic tray made in the form of sections of the screw surface, the vertical side faces of which are attached to the end wall of the pneumatic tray, and the free side edges are angled to the vertical faces. In this case the pneumatic tray is movable connected by its loading end with the lower end of the inclined feeder tray. iui Fig. 1 shows a device for loading the charge on pallets of an sintering machine, side view; 2 shows a view of an inclined feeder tray and a pneumatic tray on the discharge side; in fig. 3 - pneumatic tray with gas distribution grid removed, perspective view. The device for loading the charge on the sintering belt includes a hopper 1, a vibratory feeder 2 with an inclined tray and a pneumatic tray, which consists of the bottom 3, the face k, the side 5 walls and the gas distribution grid 6. The latter, together with the walls and the bottom, forms the sublattice and sub-grid chambers the chamber is connected to the fan with the help of an air inlet pipe 7, the trough-like superlattice chamber serves to transfer the feed material. The gas distribution grid 6 of the pneumatic tray consists of three sections, the planes of which are inclined towards the hearth of the 8 sinter machine at an angle to the bottom, respectively, the first section without blowing holes 50-65 ° (angle o / -from Fig. 1, the second section (with blowing holes mi) (Wal ft), the third section (also e blowing holes) 20-50 (angle j). The side walls 5 of the pneumatic chute are made as sections of a helical surface (or the surface of a screw conoid). This surface is formed by moving the direct generatrix two lines mind guides, / of which one is a cylindrical screw line, the other is straight (screw axis). The generator is moving, leaving the entire time parallel to a given parallel plane. In the case under consideration, the axes of the helical lines of the side walls 5 coincide with their lower bounds 9 adjacent to the bottom 3, and the plane of parallelism with the plane of the end wall k. The upper free (loose) faces 10 of the side walls 5 are arranged along helical lines with different directions of rotation (opposite to each other), verti cross lateral faces 11 are attached to the end wall k of the pneumatic tray, and free lateral faces 12; installed at an angle to the vertical face m 11 (angle H in Figures 2 and 3) and tilted in opposite directions from each other. On the sintering machine, the pneumatic chute is placed between the sides 13 of the pallet and its discharge end 1 is directed toward the incendiary horn 8. The loading end 15 of the pneumatic chute is movable 35, for example pivotally, connected to the lower end 16 of the inclined vibrating tray

2.1 98

2.60

Operation mode

, 9 prototypes (large side prosos) Partial alignment | not

Full alignment

The total air flow is reduced by increasing the proportion of the instrument charge. ... 26 bodies 2, moreover, the ratio of the width of the loading end 15 of the pneumatic tray (size c in Fig. 2) to the width of the lower end 16 attached to it of the inclined tray of the vibrating feeder 2 (size c) is 0.7-0.95. Exhaust umbrella 17 is installed above the pneumatic chute to exhaust the exhaust air. The indicated optimal limits of the design parameters (d / t ratio), the angles oL and H are determined as a result of the research. The parameter a / b assures the formation of a layer on the pallets by the loading device, in which the near part is filled with the initial gas permeability and the central part is blown by the pneumatic hammer, whose gas permeability is 20-30% higher than the original, which allows for an increase in the gas-dynamic resistance Not a single layer from the sides to achieve a more equal number of air distribution across the width of the pallet. Studies of the influence of the design parameter d / b on the redistribution of air across the width of the C 2 m sintering tape showed (see table) that when a / b 0.95, the width of the side layer of the charge is insufficient to equalize the air flow through the width of the tape. If a / b = 0.7, by increasing the area of the pallet in the proportion of the flat batch of side streams, the total flow of air drawn through the bed is reduced.

The proposed profile of the gas distribution lattice was investigated on a stand installation simulating the process.

loading the charge onto the grate pallet, by research, has established that the magnitude 1 on the slope of the second section plays an important role in shaping the layer of feed material. If .ri jb O prohod, Chgstichnoe for. and accumulation in the area of large., without exposing the -1xs to a decrease in pieces of material. Due to the clogged holes in the grating of the overwetted mixture, the uniformity of movement of material along it, the quality of the formed layer o decreases. If the angle fb is 30 °, the efficiency lattices on ocHotsHOMy indicator - gas permeability of the ttn-ixTbf layer, laid on pallets of sintering machine “Causes” - reduction of the separation of asters in the air flow.

The execution of the boot device according to the proposed technical solution allows almost completely eliminating the shrinkage cracks (and, consequently, air throughthroughs) during the sintering process at the border I), due to a layer of thicker near-side charge and fluffed Si)

Ihto pnevioolotka. For this, the side walls 5 of the pneumatic tray are filled in the form of screw sections.

Surfaces that turn tops 10 along screw lines 35 opposite to each other. In this direction, the free side faces 12 are located in the loading end of the pneumatic chute with a slope towards the sides of the pallet at an angle of 50 h to the vertical, Specified by TexKii Jei. ,, KO4 dissolution provides for the gradual formation of a U when the tape is moving; reBpog.vrnaya congregation sideways with; ;;; с.ми ri;:; i; MOJioTi: a shkhta slopes in 45 borg pallets,

iyoopaTcoHbis c; e; ani in the bowl, and TOP .-, .ni-i, which is dense and r .; -: rovie roi: ;;

YG: About the slope from the PLOT is ppushen: -; -: iiji-ix

e: tstz- / et obzzov-yu - S –ihio iu-: x ;;:.; P

Sortseogs; ogkos. e-9f5 - f this case is longer than the pzven or greater angle of repose of the charge. If the scientific research institute changes (depending on humidity) the angle of repose of the charge from 55 to 67, the angle is within the limits Increasing the rotation of the side walls of the pneumatic hammer by angle f U O is undesirable because it leads to excessive consolidation of the charge near the sides of the pallet. The angle, as indicated, leads to the formation of shrinkage cracks.

Vibration of the pneumatic chute contributes to uniform distribution of the charge over the gas distribution grid and eliminating clogging of its blow holes download With the passage of - and pallets with large pieces of material stuck to the grate under the bottom of the pneumatic hammer, the latter, due to the hinged connection, under the action of the forces from the movement of the tape has the ability to deviate in the direction of movement and upwards, as if automatically increasing the gap between the bottom and the grate pallets for passage of eglospek,

The device works as follows

Downloadable material (item) of

This is: -with vibrating feeder 2 and due to the fact that loading1; the 15th end of the pneumatic tray is less in width than the end 1b of the inclined chute of the vibrating feeder 2, pivotally connected to it. tray,. There, through the air supply pipe 7, air is supplied to the sublattice chamber, which passes through the blowing openings of the gas distribution grid 6 through the granular material moving along the grid. In this case, the large particles of the charge, when leaving the pneumatic tray, are placed on pallets in the lower layers of the layer, while the lighter and smaller particles are carried by the air flow along an inclined trajectory and are deposited on the surface of the layer and larger particles. Exhaust air is removed through the exhaust umbrella IJr. The mixture of side streams, falling between the sides 13 pallets and the side walls 5 of the pneumatic tray due to the gradual inclination of the latter along the screw line towards the sides under the force of the drive of the sintering machine, the hopper 1 enters the inclined plane of the tape, pressed by the side walls 5 of the pneumatic tray to the sides 13 and pressed into the corner; on the part of the pallet. The profile thus formed from the side slopes of the compacted charge is filled with the fluff charge of the pneumatic tray. The presence of compacted charge slopes at the sides of the pallet eliminates the onboard air swamps during sintering.

In comparison with the prototype, the set of features in the device for charging the mixture according to the invention provides high efficiency and reliability of its operation, as it allows to significantly reduce the onboard air inflow during sintering of the charge, to eliminate clogging of the gas mixture of the gas distribution grid of the pneumatic tray and the probability of device breakage (jamming pneumatic tray) in the case of the presence of large remnants of aglospek on the grate pallet supplied under the load-25 ku. Under medium conditions, the on-board suction pumps on sintering tapes amount to 10-15% of the total amount of air sucked through the layer. By eliminating the side thrusts, the flow of air through the combustion zone of the solid fuel in the sinter blend charge layer can be increased by 10%. increase installation performance. The expected economic effect only from the elimination of airborne downfalls when using the invention is about 105 thousand rubles per year. Compared with the basic version, namely the currently used construction of a loading device, including a bunker, a vibrating feeder and a baffle plate, on sintering machines, the efficiency of the proposed device is even higher, as it allows you to more evenly load the charge on the grate pallet, providing due to processing

charge in a pneumatic tray with upward air flow; laying of a layer with a higher gas permeability and optimum distribution of solid fuel throughout the height. Such a load gives an increase in the productivity of the sintering machine in comparison with the base variant by approximately 22% and a decrease in fuel consumption by 10.

Claims (2)

Invention Formula 1 A device for loading the charge on an sintering machine, including a bunker, a feeder with an inclined chute and a pneumatic chute, consisting of a bottom, front, side walls and a gas distribution grid, consisting of three sequentially and rigidly connected sections, of which the first and the third are installed with a slope to the bottom, I distinguish Shchees by the fact that, in order to increase the efficiency and reliability of operation, the loading end of the pneumatic lot is. ka, adjacent to the lower end of the inclined feeder tray, is 0.7-0.95 wide in width, the second section of the gas distribution grid is set at an angle to the bottom, while the side walls of the pneumatic tray are made in the form of sections of the helical surface, the vertical side faces of which attached to the end wall of the pneumatic tray, and the free side faces are angled to the vertical facets. 2. The device according to claim 1, wherein the pneumatic chute is movably connected to the lower end of the inclined chute of the feeder. Sources of information taken into account during the examination 1. USSR author's certificate number 38693, cl. F 27 B 21/00, 19732. USSR author's certificate in accordance with application t 28t 9042/02, cl. F 27 B 21/06, 1980. tf: 4- -4- „.;. ::: ЩЩЩ gdgggttt- - T T + -I + SHShPSH Fie.Z