WO2004031653A1 - Circulating firing grate for complete combustion - Google Patents

Abstract

The present invention relates to a circulating firing grate for complete combustion. In the present invention the existing reciprocating grates and chain grates are respectively designed with ring form with front end and back end which are close, and coal is circularly burned out on the firing grates. Accordingly it solves some problems that the resorting time of coal in stove is short, and waste is generated due to incomplete combustion and burnout, and thermal efficiency of boiler is decreased.

Description

 TECHNICAL FIELD

 The invention relates to a boiler grate, in particular to a circulating embers grate. Background technique

 At present, the mechanized coal-fired (strat-burner) grate commonly used is mainly divided into two categories: reciprocating drive grate and chain-link drive grate. This type of grate is discharged during the working process. The disadvantages are: First, the ignition of coal is ignited only by the radiant heat of the furnace arch. The ignition is from the upper layer of the coal to the lower layer. In contrast to ventilation, it is in a limited ignition state. Unfavorable combustion will cause incomplete combustion; 2. The coal stays on the grate is short (the length of the grate is limited) and cannot be fully burned; 3. The lower coal is in the final fire, so fine coal will be vented from the grate. Leaked, causing waste.

Summary of the Invention

 The object of the present invention is to provide a circulating ash-burning grate, which overcomes the short residence time of coal existing in the reciprocating grate and the chain-link grate in the existing mechanized coal-fired grate. It ca n’t burn enough, embers, and the bottom fine coal is easy to leak from the gap of the grate vent hole and cause waste.

In order to achieve the object of the present invention, according to the first aspect of the present invention, a circulating ash burner grate is provided, which is composed of a fixed grate sheet support, a movable grate sheet support matched with a supporting roller on the fixed grate sheet support, and a fixed The fixed grate sheet matched with the girder bracket mounting cross beam, the movable grate sheet and the transmission device matched with the movable grate sheet bracket mounting cross beam, the movable grate sheet and the fixed grate sheet are interspersed and arranged, and the fixed grate sheet support is a long ring, so The movable grate bracket is composed of a pair of opposite rectangular movable grate brackets and another pair of opposite arc-shaped movable grate brackets. The shape is a long ring-shaped combined bracket, and the transmission device is fixed on the fixed grate bracket. Bearing A device, a swing rod is connected between the bearing of the bearing device and at least one of the rectangular movable grate plate bracket or the curved movable grate plate bracket in the movable grate plate bracket, and an arc or rectangle connected to the connecting swing rod The movable grate bracket is an active movable grate bracket, and the arc or rectangular movable grate bracket not connected to the connecting swing bar is a passive movable grate bracket. The adjacent active grate bracket and the passive grate bracket are adjacent to each other. The brackets of the passive movable grate plates are hinged, and one of the pendulum pestle is connected with the power input rocker.

 According to a second aspect of the present invention, there is provided a circulating embers grate, which is composed of a fixed grate sheet support, a movable grate sheet support that cooperates with a supporting roller on the fixed grate sheet support, and a fixing that cooperates with a fixed grate sheet support mounting beam. The grate piece is composed of a movable grate piece matched with a mounting beam of a movable grate piece support. The movable grate piece is interspersed with a fixed grate piece. The fixed grate piece support is a long ring, and the movable grate piece support is formed by a pair of opposite grate pieces. The rectangular movable grate bracket and another pair of opposite arc-shaped movable grate brackets form a long ring-shaped combined bracket, the rectangular movable grate bracket is hinged with the curved movable grate bracket, and one of the rectangular movable furnaces The slice support or the arc-shaped movable hearth support is connected to the power input rocker.

 According to a third aspect of the present invention, a circulating embers grate is provided, which comprises a fixed grate sheet support, a movable grate sheet support matched with a supporting roller on the fixed grate sheet support, and a fixed furnace matched with a fixed grate sheet support mounting beam. The row grate is composed of a movable grate piece and a transmission device matched with a mounting beam of the movable grate piece support. The movable grate piece is interspersed with the fixed grate piece. The fixed grate piece support and the movable grate piece support are both circular rings. The transmission device is a bearing device fixed on a fixed grate sheet support at the center of the movable grate sheet support, and a swing rod is connected between the bearing of the bearing device and the movable grate sheet support, and the swing rod and Power input rocker connection.

According to a fourth aspect of the present invention, a circulating embers grate is provided, which is composed of a grate bracket, a chain and a transmission device, and the chain is composed of an active grate chain and a driven furnace. The active grate chain is a horizontal ring structure, the driven grate plate is inserted in the forward and reverse directions with the active grate chain pin, and the adjacent driven grate plates are overlapped or interlinked. The grate bracket There are ash removal openings on the side walls.

 Compared with the prior art, the present invention has a circular grate structure. Coal can be cyclically burned in the furnace. The coal stays in the furnace for a long time. The bottom coal forms an igniting bottom fire. The cyclically burning coal seam will be covered by newly entered coal crawlers. On the other hand, the combustion is from the bottom layer to the upper layer, and the direction of ventilation is the same, so that a complete combustion state is formed. The beneficial effects are: 1. Coal can fully burn, reduce waste, improve combustion efficiency, and the combustion efficiency is improved compared with the traditional layer-fired boiler. More than 11%; Second, the smoke exhaust blackness and dustiness are reduced, and its soot emission concentration is equivalent to one-fifth of the circulating fluidized bed boiler; Third, it can achieve low temperature (900) combustion, achieve full desulfurization and Low NOx emission of harmful gas, which is comparable to that of a circulating fluidized bed boiler; 4. It can burn about 3,000 calories of inferior coal and plant fuels; 5. Its comprehensive operating cost is only one half of that of a circulating fluidized bed boiler. BRIEF DESCRIPTION OF THE DRAWINGS

 Fig. 1 is a schematic plan view of a circulating embers grate when the movable grate sheet support is a long ring combined support, and the transmission device is two sets of bearing devices; Fig. 2 is a circulating embers grate in the movable furnace; The row bracket is in the shape of a long ring combined bracket, and the transmission device is a schematic enlarged sectional view of the section A-A in FIG. 1 when the transmission device is a set of two bearing devices;

 FIG. 3 is a schematic structural diagram of a circulating sintering grate when the movable grate sheet support is in the shape of a long ring combination bracket, and the transmission device is a set of bearing devices at the center of the fixed grate sheet support;

 FIG. 4 is a schematic structural plan view of a circulating sintering grate in the form of a long ring-shaped combined support for the movable grate bracket, and the transmission device is a set of bearing devices outside the fixed grate bracket;

FIG. 5 is a top view of a circulating embers furnace when the bearing device is not provided; Intention

 FIG. 6 is a schematic diagram of a circular burner grate in a shape of a circular ring on the fixed grate sheet support and the movable grate sheet support;

 Figure 7 is a schematic diagram of the case of the circulating embers grate when the structure is a chain structure. DETAILED DESCRIPTION

A preferred embodiment of the present invention is given below with reference to the accompanying drawings: An embodiment shown in FIG. 1 and FIG. 2 is a fixed grate bracket 1, a movable grate bracket that cooperates with the upper roller 2 of the fixed grate bracket 1, The fixed grate plate 4 matched with the fixed grate plate bracket 1 mounting beam 3, the movable grate plate 6 matched with the movable grate plate bracket mounting beam 5 and the transmission device, the movable grate plate 6 and the fixed grate plate 4 are interspersed and arranged, and the fixed furnace The row support 1 is a long ring. The movable grate support is composed of a pair of opposite rectangular movable grate support 7 and another pair of opposite semi-circular annular grate support 8. The shape is a long ring combined support, and the transmission device is fixed at The two sets of bearing devices 9, 10 on the fixed grate bracket 1 are respectively located at the center of the circle where the semi-circular movable grate bracket 8 is located, and the bearings of the bearing devices 9, 10 are respectively rectangular with the corresponding semi-circular annular grate bracket 8. A swing rod 11 is connected between the movable grate bracket 7 and a swing rod 11 is connected to the power input rocker 12 between the fixed grate piece 4 and the movable grate piece 6 in the ash area. 15 ~ 20mm slit ash 13, ash removal opening 14 has a lower portion. An embodiment shown in FIG. 3 is that the transmission device is a set of bearing devices 9 located at the center of the fixed grate sheet support 1, and a swing rod 11 is connected between the bearing of the bearing device 9 and the middle of the rectangular movable grate sheet support 7, The fixed grate bracket 1 corresponds to the semicircular annular movable grate bracket 8 on the inner wall of the movable grate slice 6 on both sides of the inner wall bolted with a roller seat with a limited number of rollers 15, the rectangular movable grate bracket 7 and the semicircular annular grate bracket 8 Between connected with a hinge 16. An example given in FIG. 4 is that the transmission device is a set of the bearing device 9 located outside the fixed grate sheet support 1, and the bearing of the bearing device 9 and the movable grate sheet support are semicircular annular grate. Swing rods 11 are connected between one of the brackets 8 and the fixed grate bracket 1 corresponds to a semicircular ring-shaped movable grate bracket 8 and the inner wall of the movable grate slice 6 on both sides of the bracket is fixed with a roller seat with a limiting roller 15. An embodiment shown in FIG. 5 is an example without the bearing device. A rectangular movable grate bracket 7 or a semi-circular annular movable grate bracket 8 is connected to the power input rocker 12, and the fixed grate bracket 1 corresponds to a semicircle. A limit roller 23 is fixed on the inner wall of the outer plate of the 8-shaped movable grate sheet support. An example given by FIG. 6 is that it consists of a fixed grate sheet support 1, a movable grate sheet support that cooperates with the upper roller 2 of the fixed grate sheet support 1, a fixed grate sheet 4 that cooperates with a mounting beam of the fixed grate sheet support 1, The movable grate piece 6 and the transmission device are matched with the installation beam of the movable grate piece support. The movable grate piece 6 and the fixed grate piece 4 are interspersed with each other. The fixed grate piece support 1 and the movable grate piece support are circular. A bearing device 9 fixed on the fixed grate sheet support 1 at the center of the movable grate sheet support. A swing rod 11 is connected between the bearing of the bearing device 9 and the movable grate sheet support. The swing rod 11 is connected to the power input rocker 12 The ash removal port 14 corresponds to a 15-20 mm ash falling gap 13 between the fixed grate plate 4 above and the movable grate plate 6 above. An embodiment shown in FIG. 7 is that it is composed of a grate bracket 17, a chain and a transmission device. The chain is composed of an active grate chain 18 and a driven grate plate 19. The active grate chain 18 is a horizontal ring structure. The positive and negative insertion of the moving grate piece 19 is fixed to the pin 20 of the active grate piece chain 18, the side of the adjacent driven grate piece 19 is overlapped or implicated, and the side of the grate bracket 17 has an ash removal port 21. In the embodiments shown in FIGS. 1 to 6, the shaker 12 is connected to the speed reducer 22 during use. In the embodiment shown in FIG. 7, the driving sprocket shaft 24 is connected to the power driving device when in use.

Claims

1. A circulating grate fire grate, comprising a fixed grate sheet support, a movable grate sheet support that cooperates with a supporting roller on the fixed grate sheet support, a fixed grate sheet that cooperates with a fixed grate sheet support mounting beam, and a movable grate sheet support The movable grate piece is matched with a mounting beam and a transmission device. The movable grate piece is interspersed with the fixed grate piece, which is characterized in that: the fixed grate piece support is a long ring, and the movable grate piece support is formed by a pair of opposite rectangles. The movable grate bracket and another pair of opposite arc-shaped movable grate brackets are combined into a long ring-shaped combined bracket. The transmission device is a bearing device fixed on a fixed grate bracket. The bearing of the bearing device and the A swing rod is connected between at least one of the rectangular movable grate bracket or the curved movable grate bracket in the movable grate bracket. The arc or rectangular movable grate bracket connected to the connecting swing rod is an active movable grate bracket. The arc-shaped or rectangular movable grate bracket that is not connected to the connecting swing bar is a passive movable grate Between the support, the adjacent active and passive moving grate plate carrier moving grate plate carrier, the passive articulation between the moving grate plate holder, a swing of the rocker lever and the power input connector.  2. The circulating ash-burning grate according to claim 1, wherein: the transmission device is two sets of the bearing device, respectively located at the center of the circle where the arc of the arc-shaped movable grate bracket is located, and A swing rod is connected between the bearing of the bearing device and the corresponding arc-shaped movable grate plate support and between the rectangular movable grate plate.  3. The circulating embers grate according to claim 1, characterized in that: the transmission device is a set of the bearing device, which is located at the center of the fixed grate plate bracket, and the bearing of the bearing device and two A swing bar is connected between the middle of the rectangular movable grate sheet support, and the fixed grate sheet support is corresponding to the arc-shaped movable grate sheet support with a roller seat with a limited number of rollers fixed on the inner wall of the movable grate sheet. 4. The circulating embers grate according to claim 1, characterized in that: the transmission device is a set of the bearing device, which is located outside the fixed grate plate bracket, A swing rod is connected between the bearing of the bearing device and one of the rectangular movable grate bracket or the curved movable grate bracket in the movable grate bracket. The fixed grate bracket corresponds to the curved movable grate bracket. A roller seat with a limited number of rollers is fixed on the inner wall of both sides of the movable grate plate by bolts.  5. The circulating embers grate according to any one of claims 1, 2, 3, and 4, characterized in that: the arc-shaped movable grate support is a semi-circular ring.  6. The circulating embers grate according to any one of claims 1, 2, 3, and 4, characterized in that there are 15 between the fixed grate slabs and between the movable grate slabs in the embers zone. -20mm dust fall gap.  7. A circulating embers grate, comprising a fixed grate sheet support, a movable grate sheet support matched with a supporting roller on a fixed grate sheet support, a fixed grate sheet matched with a fixed grate sheet support mounting beam, and a movable grate sheet support It consists of movable grate plates fitted with cross beams. The movable grate plates are interspersed with the fixed grate plates. The characteristics are: the fixed grate plate bracket is a long ring, and the movable grate plate bracket is a pair of opposite rectangular movable grate plates. The bracket and another pair of opposite arc-shaped movable grate plate brackets form a long ring combined bracket, the rectangular movable grate plate bracket is hinged with the curved movable grate plate bracket, and one rectangular movable grate plate bracket or arc The shaped movable grate bracket is connected with a power input rocker.  8. The circulating ash-burning grate according to claim 7, characterized in that: the fixed grate sheet support corresponds to an inner wall of the outer plate at the arc-shaped movable grate sheet support, and fixed position rollers are fixed.  The circulating embers grate according to any one of claims 7 and 8, characterized in that: the arc-shaped movable grate support is a semicircular ring.  10. The circulating embers grate according to any one of claims 7 and 8, characterized in that there is a ash fall of 15-20 mm between the fixed grate pieces and the movable grate pieces in the embers area. Crevice. 11. A circulating embers grate consisting of a fixed grate bracket and a fixed grate slice The movable grate plate bracket matched with the supporting rollers on the bracket, the fixed grate plate matched with the fixed grate plate mounting beam, the movable grate plate and the transmission device matched with the movable grate plate mounting beam, and the movable grate plate and the fixed grate plate are interspersed. The cloth is characterized in that: the fixed grate bracket and the movable grate bracket are circular, and the transmission device is a bearing device fixed on the fixed grate bracket and located at the center of the movable grate bracket. A swing rod is connected between the bearing of the bearing device and the movable grate plate support, and the swing rod is connected with a power input rocker.  The circulating embers grate according to claim 11, characterized in that there is a 15-20 mm ash falling gap between the fixed grate pieces in the embers area and the movable grate pieces.  13. A circulating embers grate consisting of a grate bracket, a chain and a transmission device, characterized in that the chain is composed of an active grate blade chain and a driven grate blade, and the active grate blade chain has a horizontal ring structure The driven grate pieces are fixed through the positive and negative penetrations with the active grate piece chain pin, the side edges of adjacent driven grate pieces are overlapped or connected, and the side wall of the grate support has a ash removal port.