CN201028566Y

CN201028566Y - Macrotype transverse beam grate with side air intake well-wind distributed device

Info

Publication number: CN201028566Y
Application number: CNU200720011728XU
Authority: CN
Inventors: 刘玉振
Original assignee: WAFANGDIAN YONGNING MACHINERY FACTORY
Current assignee: WAFANGDIAN YONGNING MACHINERY FACTORY
Priority date: 2007-04-18
Filing date: 2007-04-18
Publication date: 2008-02-27
Anticipated expiration: 2017-04-18

Abstract

The utility model discloses a fire bar for boiler, in particular to a large scale cross fire bar which has a lateral air inlet and even air distribution device. The utility model comprises an air chamber which is arranged horizontally. The internal sides of the air inlets positioned at two ends of the air chamber are provided with a windscreen. The windscreen has a certain function of wind shielding when in use to ensure horizontal even air distribution along the fire bar and ensure the basic consistent air flow which is blew on the dire bar surface from the gap between the air chamber and the fire bar, thereby ensuring the fuel on the fire bar surface have the same quantity air, and ensuring the burning speed of fuel be same. The utility model has the advantages of consistent fire line, consistent slag line, full fuel burning, energy conservation and economic and safe operation of the boiler.

Description

Large-scale transverse beam fire grate with side air intake even distributing wind device

Technical field

The utility model relates to a kind of boiler fire grate structure, particularly a kind of large-scale transverse beam fire grate with side air intake even distributing wind device.

Background technology

At present, with in the large-scale transverse beam fire grate, have the fire grate central sill of the horizontally set of doing with the I-shaped steel at boiler, between adjacent fire grate central sill air compartment is arranged, air compartment is that the side plate by base plate and both sides surrounds the fire grate that the top of air compartment is made up of parts such as fire grate segments.The two ends of air compartment are air inlet during work, blowing inwards simultaneously, and the wind that enters air compartment blows out from top fire grate place, is used for making its burning to the fuel air feed of fire grate top.The horizontal cloth wind of existing this cloth wind mode is inhomogeneous, and air communication is crossed the air inlet of outer air channel from two ends and entered air compartment, and the one, be subjected to the hydrostatic pressure of air compartment wall to it, the 2nd, the dynamic pressure effect of air-flow Parallel airflow chamber axis.Static pressure constantly moves air-flow to the vertical gas axis direction, because of air compartment be three airtight, one side upwards is provided with guide rail wind storehouse sealing block, fire grate crossbeam and fire grate segment, this simultaneously is apertured, air-flow is at undergauge constantly, the expansion back goes out grate surface along the orifice flow between fire grate segment, dynamic pressure makes axis that air-flow prolongs air compartment flow to the air compartment inboard by the air inlet at two ends, because fire grate is the bilateral air intake, so be provided with middle baffle plate on the fire grate axis, according to law of conservation of energy, the energy of air-flow is provided by air blast, and certain in other words conj.or perhaps, then dynamic pressure is low for the static pressure height of air-flow, otherwise, the dynamic pressure height, then static pressure is low, and the factor that produces the horizontal cloth wind of air compartment inhomogeneities comprises: air-flow enters the expansion of air compartment from the air delivery duct, it is the unexpected increase of flow section, produce eddy current at the root of primary air, therefore reduced the static pressure of air inlet, the expansion stream of Here it is air-flow is pressed and is increased, make air inlet place air-flow static pressure low, the air-flow air quantity that upwards flows out grate surface also can lack herein; Air-flow in air compartment when the fire grate center flow, along under the journey hydrostatic pressure, constantly be forced upwardly through ventilating duct and flow out stoker surface, be i.e. shunting constantly, the shunting supercharging that promptly produces air-flow, and the speed of primary air is reduced, the dynamic pressure reduction of air-flow this moment and static pressure raises, the speed to baffle plate place, fire grate axis along the air compartment axis is zero, it is zero that dynamic pressure reduces to, and that static pressure rises to is the highest, and this moment, throughput also reduced because of shunting action certainly.

Inhomogeneous along the horizontal cloth wind of fire grate is boiler combustion efficiency key factor on the low side always, because cloth wind is laterally inhomogeneous, tolerance wretched insufficiency in the coal seam on the fire grate in the weak wind district that ventilates less, this local coal combustion speed is slowed down, make the coke of considerable part not burn and just be brought into slag bucket, promptly " run flourishing ", the phosphorus content that forms in the slag is too high, has increased the q4 loss of boiler; Because cloth wind is laterally inhomogeneous, the regional area that ventilation is excessive easily forms " burner ", even " fiery bar ", make a large amount of air have neither part nor lot in combustion reaction and directly enter burner hearth, thereby reduced the unfavorable burning of fire box temperature, and increased the flue gas loss q2 of boiler; Cloth wind is inhomogeneous, has both influenced the security of boiler, reduces the economy of boiler operatiopn again.

Summary of the invention

The purpose of this utility model provide a kind of along the horizontal cloth wind of fire grate evenly, make the tolerance of the fuel that is arranged in the fire grate top moderate average, sufficient combustion, burning velocity unanimity, save the large-scale transverse beam fire grate with side air intake even distributing wind device of the energy, overcome the deficiencies in the prior art.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, it comprises the air compartment of horizontally set, it is characterized in that: the air inlet inboard, two ends of described air compartment is provided with deep bead.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, wherein said deep bead is made up of last deep bead and following deep bead.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, the wherein said deep bead of going up is obliquely installed, and incline direction is inclination inwards from top to bottom, and its tilt angle alpha is between 40 °～50 °.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, wherein said deep bead down is bending-like, and the angle beta of dogleg section is between 25 °～45 °, and dogleg section is outward-dipping from the bottom to top.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, the distance H of the air inlet of wherein said deep bead and air compartment termination is between 750cm～790cm.

Large-scale transverse beam fire grate with side air intake even distributing wind device of the present utility model, because the air inlet inboard, two ends of air compartment is provided with deep bead, in operation process, this deep bead has played certain effect of keeping out the wind, make along the horizontal cloth wind of fire grate even, make wind blow to air quantity basically identical on the grate surface from the slit that air compartment is flowed through between fire grate segment, thereby make the fuel on the grate surface obtain as many air substantially, make the burning velocity of fuel identical, the ignition line unanimity becomes the slag line unanimity, and fuel combustion is abundant, save the energy, boiler operatiopn not only economy but also safety.

Description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment;

Fig. 2 is an A-A local section schematic diagram shown in Figure 1.

The specific embodiment

As shown in the figure: 6 is the fire grate central sill of the horizontally set in the fire grate, select for use I-steel to make, 1 is air compartment, the bottom of air compartment 1 is formed by the base plate and the symmetrically arranged side plate 7 that tilts, it above the air compartment 1 fire grate that forms by parts such as guide rail wind storehouse sealing block, fire grate crossbeam and fire grate segments, form the slit on the fire grate, the termination of air compartment 1 is air inlet 4 and air inlet 5, and air inlet 4 is connected by ventilation shaft with the exhaust outlet of air blast with air inlet 5.Above-mentioned is the prior art part, no longer describes in detail.

Be provided with deep bead in the termination of air compartment 1 air inlet 4, air inlet 5 inboards, deep bead is made up of last deep bead 2 and following deep bead 3.Last deep bead 2 is obliquely installed, and incline direction is from top to bottom to tilt inwards, and its tilt angle alpha is defined as 45 °, promptly between 40 °～50 ° all can, the two ends of deep bead 2 is fixed with 6 welding of fire grate central sill.Following deep bead 3 is bending-like, and promptly top is converted into heeling condition, and the bottom vertical is provided with, and dogleg section is defined as 30 ° with vertical angle beta partly, promptly between 25 °～45 ° all can, dogleg section is outward-dipping from the bottom to top.The two ends of

deep bead

3 and 7 welding of described side plate are fixing.The termination air inlet 4 of deep bead and air compartment 1, the distance H of air inlet 5 are defined as 760cm, promptly all can between 750cm～790cm.Described deep bead is that steel plate is made, and its thickness is defined as 3mm, promptly all can between 3mm～4mm.

Claims

1. large-scale transverse beam fire grate with side air intake even distributing wind device, it comprises the air compartment (1) of horizontally set, it is characterized in that: the air inlet inboard, two ends of described air compartment (1) is provided with deep bead.

2. the large-scale transverse beam fire grate with side air intake even distributing wind device according to claim 1 is characterized in that: described deep bead is made up of last deep bead (2) and following deep bead (3).

3. the large-scale transverse beam fire grate with side air intake even distributing wind device according to claim 2 is characterized in that: the described deep bead (2) of going up is obliquely installed, and incline direction is inclination inwards from top to bottom, and its tilt angle alpha is between 40 °～50 °.

4. the large-scale transverse beam fire grate with side air intake even distributing wind device according to claim 3 is characterized in that: described deep bead (3) down is bending-like, and the angle beta of dogleg section is between 25 °～45 °, and dogleg section is outward-dipping from the bottom to top.

5. the large-scale transverse beam fire grate with side air intake even distributing wind device according to claim 4 is characterized in that: the distance H of the termination air inlet of described deep bead and air compartment (1) (4,5) is between 750cm～790cm.