SU1648869A2 - Aerodynamic loose material conveyer - Google Patents

Abstract

The invention relates to the transportation of bulk materials and can be used in the energy, metallurgical, construction, chemical, food and other industries. The purpose of the invention is to increase the reliability of work. The aerodynamic conveyor contains a blowing duct 1, a transport duct 2 and an air-permeable partition 3 with an accelerating section 4, above which is transverse. partition 5, Partitions 3 and 5 are made of water-cooled fin tubes installed with a gap. The blinds are set obliquely with the formation of intermediate gaps between adjacent ones. Above the partition 3, water-cooled heating surfaces are provided, arranged in a checkerboard pattern with respect to water-cooled pipes installed on the grille louver. Air enters the air duct 1 under the partition 30 as a result of material contact with the water-cooled pipes installed on the grille louver. partitions 3 and 5 and pipes of a water-cooling surface heat the water supplied to these pipes I sludge. (L with:

Description

The invention relates to the transportation of bulk materials (ash, solid slag, chemicals, cement) and can be used in the energy, metallurgical, construction, chemical, food and other industries.

The purpose of the invention is to increase the reliability of the conveyor during transportation of hot bulk materials.

Figure 1 shows the conveyor; in Figure 2, node I in figure 1.

The aerodynamic conveyor consists of an air supply duct 1 and a transport duct 20

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The perceptible partition 3 has an accelerating section 4, over which the transverse movable partition 5 is located. The air-permeable partition, 3 and the transverse movable partition 5 are a suction grille of water-cooled pipes 6 fixed to the louvers of the grille 7. Goals formed between the louvers are directed to the transport side of the material. The pipes 6 of the air-permeable parorodka 3 are located at a distance corresponding to the fractional composition of the material, and the angle of inclination of the louver 7 ensures equal 00 00

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in the gaps, respectively, between the pipes and between the louvers and the pipes (FIG. 2, type A), water-cooled pipes mounted on the louvers of the grille, transverse movable partition 5, are installed movably and with a gap Additional water-cooled pipes are filled above the air-permeable wall 3 8, installed in a checkerboard order 9 with respect to the pipes of the permeable partition 30 Lower edges of the side walls of the transport box (not indicated) are located below the air-permeable partition and are gently bent inward Air duct present is removed from the transport duct 2 via suction 90

The aerodynamic conveyor operates as follows.

The transported hot material (for example, solid fuel ash after the ash collector of a thermal power plant) is supplied to the transport box through an inlet pipe formed by an air-permeable partition of the booster section 4 and a transverse partition 5. Air is drawn into the air duct 1 from the end or into any a point along the length of the conveyor, out of the box 1, the air passes through the entire length of the air-permeable partition 3, recruited from water-cooled pipes installed on the lattice x

Along the water-cooled pipes 6 installed on the louvers of the grille 7, narrow slits (gaps) for air passage are formed between the pipes of the aerodynamic conveyor. The width of the slit (value Z, fig 2) depends on the fractional composition of the transported material and may exceed the size of the equivalent particle diameter 0 Otherwise, failure of particles in the air duct 1 at emergency shutdowns of the air supply device is possible;

The presence of louvers 7 and their inclination in the direction of transporting the material creates conditions for the formation of a directional air stream, the opening angle of which will depend on the distance between two adjacent louvers. For the purpose of adjusting the jet power depending on the size of the transported material, the tilt angle of the louver 7 ensures equal gaps

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respectively between pipes 6 and between louvers and pipes: x y 2 (fig. 2) 0 Water cooled pipes, for | lattices attached to the louvers in the zone of the booster section 4 increase the strength of the air-permeable partitions in the most loaded area, which receives the force of the gravity of the feed material into the aerodynamic conveyor. wear ,,

The ash particles trapped in the transport box 2, under the force of gravity, are lowered down, come into contact with water-cooled pipes attached to the louvres of the grille of the air-permeable partition 3, give them their heat, and then are blown off with pipes by air streams flowing from the slits of the partition wall Thus, in the channels formed by the pipes 6 and the upper louvers 7 there is a downward and upward movement of the ash particles, which creates favorable traps for heat exchange between the hot ash particles and the water-cooled surface. water cooled pipes fixed on the lattice louvers Additional heat removal occurs in additional water cooling pipes 8 made of smooth pipes located above the air distribution wall in a staggered order with respect to water cooled pipes 6 fixed on the greyable; 3 partition wall grids 7 "An additional row of water-cooled pipes 7 operates in a fluidized bed of transported material, which improves fluctuations in the porosity of the bed, improves fluidization homogeneity and reduces the resistance of the layer 0 An additional row of water-cooled pipes 8 helps reduce the emission of particles of the transported material into over-layer space, which reduces the dust content of the air removed from the transport box 2, reduces the cost of cleaning this air by fine particles. The chess arrangement of the pipes 8 helps to improve the hydrodynamic conditions of the cross flow of pipes.

Claims (4)

Claim 1. Aerodynamic conveyor for moving bulk materials along the busbar No. 895839 _# characterized in that, in order to increase the reliability of operation, it is equipped with water-cooled pipes fixed one at a time in the middle part of the japs of the breathable partition. 2. The conveyor according to π.1, with the exception that it is equipped with additional water-cooled pipes located staggered above the pipes of the air-permeable partition. 3. The conveyor according to claim i, characterized in that the transverse movable partition is a louvre grille, the blinds of which are mounted to rotate in a vertical plane and are made with air-cooled pipes in the middle part. Order 1494 Draw 487 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and Publishing Plant Patent, Uzhhorod, st. Gagarina, 101