RU2115863C1 - Mechanical shearing grate - Google Patents

Abstract

FIELD: furnace engineering; burning coal in furnaces of average capacity. SUBSTANCE: mechanical shearing grate includes rows of moving reciprocating grate bearers 8 with fire bars and fixed bearers 7 with fire bars and coal feed plate 4. Moving grate bearers are made in form of U-shaped bearing links which are supported by pins and are intended for swinging motion at deflection from vertical axis by means of rods 9 and motion hydraulic cylinder 11. Grate is divided into zones by means of partitions of wind boxes. EFFECT: enhanced efficiency. 3 dwg

Description

 The invention relates to a furnace technology and is intended for burning coal in a furnace and furnaces of medium productivity.

 Known canvas grate for fire chambers with a mechanical drive, containing stepwise arranged transverse rows of alternating movable and fixed grates (1).

 The disadvantage of this grate is the complexity of its manufacture.

 The closest technical solution is a mechanical pusher grate, containing moving reciprocating grate beams on roller bearings.

 The disadvantage of the design is that the skew of the frame is possible, leading to the wear of the grate and its complete replacement, and this is a time-consuming operation, it is possible to sinter the coal, the combustion efficiency is low.

 The authors set themselves the task of creating such a grate, which would be easy to manufacture and operate, in the event of failure of any part of it - the link would be easily replaced, would exclude the possibility of sintering of coal. EFFECT: increased efficiency of fuel combustion.

 This goal is achieved by the fact that the known mechanical peretalkivaya grate, containing moving reciprocating grate girders with grates, further comprises alternating rows of transverse stationary grate girders with grates and a coal feed plate, and the moving grate girders are made in the form of U-shaped drawstring supports that rely on fingers and have the ability to swing reciprocating movement with a deviation from the vertical axis by means of rods and a hydraulic cylinder chi, in addition, the grate is divided by the transverse partitions of the blast chambers installed under the grates, into blast zones.

 In FIG. 1 shows a mechanical repulsive grate; in FIG. 2 is a section AA in FIG. one; in FIG. 3 - section BB in FIG. one.

 The mechanical overflow grate contains grates 1, gate 2, a stationary horizontal grate 3, a coal feed plate to the grate 4, a grate 5, which rotates freely in the axis and serves to prevent spilling of coal and sealing the zone, a scraper 6 used for cleaning coal feed plates from adhering material. The scraper rests freely on the stove. The fixed beam 7 is rigidly fixed to the lattice frame and grates 1 are located on it.

Movable beam 8, made in the form of a U-shaped support, resting on the fingers. The wings around the fingers have a swinging reciprocating movement with a deviation from the vertical axis, for example, 85 ^o in both directions. Grates 1 are mounted on the wings.

 Link 9, two pieces, articulating all movable backstage beams to each other.

 Stiffness farm 10, connecting the rods to each other and reporting the total rigidity of the entire system.

 The hydraulic cylinder 11, which makes the movement of all movable U-shaped support-wings and plates of coal supply to the grate to a length of ≈ 200 mm.

 The power beam 12, through which the force of the hydraulic cylinder rod is transmitted to all the movable backstage beams and the coal feed plate to the grate.

 Partitions 13 of the blast chambers, which are installed directly under the grates. Partitions divide the grate into blast zones, prevent air flow, the supply is made directly to the grate operation zone, it provides good adjustment of the blast, which ensures a more complete and high-quality combustion of fuel.

 When the rod 11 is moved by means of the rod 9, the movable wings 8 are set in motion, while the coal feed plate 4 coal coming from the hopper is periodically fed to the grate plate of the furnace. In this case, when the rod moves in the forward direction through the rod 9 and the link 8, the moving grates (i.e., grates installed on the wings) are moved relative to the fixed (i.e. grates installed on a fixed frame) with the simultaneous movement of coal along the grate. Due to the fact that the link 8 reduces the reciprocating movement relative to the axis, the grate connected with it moves not only in the horizontal, but also in the vertical directions, that is, a wave-like movement occurs, which improves the rustling effect of the grate on the fuel. In the forward stroke of the rod, the coal moves both vertically and horizontally. During the reverse stroke of the rod, the moving grate returns to its original position, while the fuel layer remains stationary in the horizontal direction, but is moved in the vertical direction, etc.

 The proposed design allows for better control of the blast due to a more dense supply of air ducts to the grille and the possibility of regulating the blast.

 Thus, the proposed set of features leads to the achievement of the goal - good mixing of coal, eliminating the possibility of sintering, increases heat transfer with less combustion of coal, that is, increases the efficiency of fuel combustion.

 The proposed device will be implemented in Alarda Mine JSC.

Claims (1)

 A mechanical pusher grate containing a reciprocating grate with grates, characterized in that it further comprises alternating rows of transverse stationary grate with grates and a coal feed plate, and the moving grate beams are made in the form of U-shaped support wings They rely on fingers and have the possibility of swinging reciprocating movement with deviation from the vertical axis by means of rods and a supply hydraulic cylinder, in addition, kovaya lattice divided by transverse baffles blow cameras mounted under the grate, in the blow area.

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