CN2126396U - Shaped coal boiler burner - Google Patents

Abstract

A molded coal boiler burner of the utility model principally comprises an upper and a lower fire grates arranged in a lower cylinder body. An inner cavity of the lower cylinder body is divided into two parts of a main chamber and a burnt out chamber by the upper fire grate. A cross water tube bundle, a lower firing arch, an upper firing arch, an air main connected with the inner cavity of the cylinder body and connected to the outside of a water tank and a quadric inner tube communicated with the air main and the other end arranged in a wind chamber at the lower side of the lower fire grate. Thus, the burner enables the molded coal to be fast firing and is able to continuously be supplemental firing to sufficiently burnt out the fuel. The smoke discharge is far away lower than that of the boiler thermal efficiency of criterion of environmental protection which is prescribed by the state and the boiler thermal efficiency is up to 78.7% while the carbon content in slag is only 9.46%. Thus, the utility model raises the boiler thermal efficiency and the heating capacity, and also saves energy.

Description

Shaped coal boiler burner

The utility model relates to a kind of boiler combustion equipment, especially for solid-fuelled molded coal boiler burner.

At present, China produces a kind of minitype vertical type moulded coal tea, bath, heating boiler, and its burner is manual chain furnace grate, and adopts gravity-flow ventilation.And manually chain furnace grate mainly by manual transmission and be attached thereto the driving wheel, traveling-grate stoker and the follower that connect and form.Because this burner is to adopt gravity-flow ventilation, chain fire-gate in addition limited length, so easily cause the moulded coal burning slowly, flame temperature is low, incomplete combustion again, waste fuel, and also the thermal efficiency is low has only 68%, but boiler slag carbon content is but up to 27.13%.

The purpose of this utility model is the molded coal boiler burner that is to provide a kind of double-layer grate, two-way machinery blowing.It can overheavy firing, makes the abundant after-flame of fuel, thereby can improve the thermal efficiency and the heat capacity of boiler.

Its concrete solution is: whole boiler is formed by connecting by upper, middle and lower three joint shell flanges, and its lower shell is communicated with welding by water tank and circle drum and constitutes.And the burner of boiler is by upper fire-grating, lower fire grating, main chamber, secondary furnace, air main, secondary air channel, big transverse water pipe bundle, up-igniting arch and ignite down to encircle and form.The lower fire grating of this burner places on the lower shell base plate.Upper fire-grating is positioned at position, lower shell inner chamber middle and lower part, and is communicated with welding and stove water formation path with water tank and circle drum, can carry out pipe type heat transfer.Simultaneously, upper fire-grating is divided into two chambers that communicate with the lower shell inner chamber, and upper chamber is a main chamber, and lower chambers is a secondary furnace.Big transverse water pipe bundle is arranged above upper fire-grating, and it is communicated with welding with the circle drum, and forms path with stove water, can manage the examination heat exchange.And under ignite arch and up-igniting arch be the skewed big transverse water pipe bundle top that is arranged in successively, and is communicated with the circle drum and welds and stove water formation path, can play ignite, combustion-supporting effect and carry out pipe type heat transfer.Place the air main that water tank is outer and be connected with water tank, its air outlet communicates with the lower shell inner chamber, can dry from back to front facing to the upper fire-grating moulded coal.One end of secondary air channel is communicated with air main, and its other end air outlet is arranged in the air compartment below the lower fire grating, blowing that can be from bottom to top.

The upper fire-grating of burner is to be basic vertical configuration connection by the vertical water pipe of 3-10 root and a horizontal water tube to be welded.

The arch skeleton that ignites of burner is evenly to be arranged by 3-8 root steel pipe, and is communicated with circle drum inner bag and is welded, and its arch is made by refractory material.

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings.

Fig. 1 is the half sectional view of boiler;

Fig. 2 arranges the boiler lower shell A-A cutaway view of situation for showing burner;

Fig. 3 is the B-B cutaway view of lower shell;

Fig. 4 is the C-C profile that ignites and encircle.

In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, boiler is formed by connecting by upper shell (1), middle cylinder body (2) and lower shell (4) flange, is fixed on the circular concrete pedestal (8), and its lower shell is communicated with welding by water tank (16) and circle drum (17) and constitutes.The lower fire grating of boiler combustion device (9) is circular castor shape ironcasting, places on the lower shell base plate.Upper fire-grating (10) is by 7 vertical water pipes (22) and the welding of a horizontal water tube (21) vertical connection, it is arranged on position, lower shell (4) inner chamber middle and lower part, and become 7 ° of angles to be communicated with by vertical water pipe (22) with the cross section of circle drum inner bag (20) to weld, be communicated with welding by horizontal water tube (21) with water tank (16) inner casing, like this, the pipeline of upper fire-grating (10) and stove water form path.Simultaneously, upper fire-grating (10) is divided into two chambers that communicate with lower shell (4) inner chamber, and upper chamber is main chamber (18), and lower chambers is secondary furnace (19).In the charging aperture place of lower shell (4), be welded with rectangular box coal feeding bucket (5) in upper fire-grating (10) top.Be positioned at upper fire-grating (10) top and distributed by 3 steel pipe crossings on different level with big transverse water pipe bundle (11) that its crossings on different level is arranged and constitute, it is communicated with welding with circle drum inner bag (20), and with stove water formation path.Under arch (12) and the up-igniting arch (13) that ignites be skewed big transverse water pipe bundle (11) top that is arranged on successively, arrange with big transverse water pipe bundle (11) crossings on different level, and is communicated with circle drum inner bag (20) by arch skeleton steel pipe (23) and welds and stove water formation path.But the skeleton of ignite arch (12), (13) all is to be communicated with welding with circle drum inner bag (20) and to constitute by 6 steel pipes (23) are uniform, encircles and then to be made by refractory material.Simultaneously, the arch that ignites leaves exhanst gas outlet (24).The external air main of water tank (16) (6), its air outlet communicates with the lower shell inner chamber, and be positioned at and the water tank (16) at upper fire-grating (10) relative position place on.One end of secondary air channel (7) is communicated with air main (6) by flange, and the other end is arranged in the following air compartment of lower fire grating (9).

During work, moulded coal (25) is sent in the burner hearth of lower shell from coal bunker (5), by the height of three stratotype coals, and the well-regulated burning above the upper fire-grating (10) that is placed in of being rectangle.Air is sent into air main (6) and secondary air channel (7) by blower fan, under the effect of two-way machinery blowing, moulded coal (25) carries out violent chemical reaction according to drying, destructive distillation, the process of catching fire, burning in main chamber (18), discharge a large amount of heat energy.Blow from back to front in wind aligning type conny row middle level from air main (6), to quicken the diffusion combustion of moulded coal.When sending into the new coal of a row from coal bunker (5), there is not the moulded coal of after-flame just to fall on the lower fire grating (9) from upper fire-grating (10) end.At this moment, blow from the wind of secondary air channel is bottom-up, both can quicken the abundant after-flame of unburnt moulded coal, again can be constantly upwards blowing through being passed the moulded coal aperture by the wind of after-flame coal seam preheating, thereby can be constantly dry new moulded coal, delivery of supplemental oxygen constantly again is to strengthen the burning of moulded coal in the main chamber.Like this, big transverse water pipe bundle (11) in the hot sweep of gases burner hearth that the moulded coal burning produces, and the exhanst gas outlet (24) of ignite under the warp arch (12) and up-igniting arch (13), after the fire tube bundle (3) that passes middle cylinder body enters upper shell and washes away little transverse water pipe bundle (14), from chimney (15), discharge.In this whole process, take reverse heat-exchange, and discharge a large amount of heat energy, and stove water is realized by pipe type heat transfer and plate-type heat-exchange the absorption of heat.

The utility model is owing to be the structure that has adopted double-layer grate, double combustion chamber, two-way mechanical blowing and pipe type heat transfer and plate-type heat-exchange mainly.So it can make moulded coal ignite soon, burn rapidly, and overheavy firing constantly, with the abundant after-flame of fuel, can make the boiler of this smoke discharge amount well below the national regulation environmental protection standard, the thermal efficiency reaches 78.7%, per hour supply 2500 fens jin of boiling water, heating area reaches 1650 square metres, and specified caloric value is 0.24MW, and the phosphorus content of slag is low, have only 9.46%, thereby improved the thermal efficiency and the heat capacity of boiler, saved the energy again.

Claims (3)

1, a kind of molded coal boiler burner, the lower fire grating (9) that it is characterized in that it places by water tank (16) and circle drum (17) and is communicated with on the base plate of integrally welded lower shell (4), upper fire-grating (10) is positioned at position, lower shell (4) inner chamber middle and lower part, and with water tank (16) and the circle drum (17) be communicated with welding, simultaneously, upper fire-grating (10) is divided into lower shell (4) inner chamber two chambers that communicate, upper chamber is that main chamber (18) lower chambers is that secondary furnace (19) has big transverse water pipe bundle (11) in the upper fire-grating top, its welding that is connected with circle drum (17), and under arch (12) and the up-igniting arch (13) that ignites be skewed big transverse water pipe bundle (11) top that is arranged in successively, and with the circle drum (17) be communicated with welding, place the air main (6) that water tank (16) is outer and be connected with water tank, its air outlet communicates with lower shell (4) inner chamber, one end of secondary air channel (7) is connected with air main, and the other end is arranged in the following air compartment of lower fire grating (9).

2, burner as claimed in claim 1 is characterized in that upper fire-grating (10) is basic vertical configuration by a vertical water pipe (22) of 3-10 root and a horizontal water tube (21) and is connected and is welded.

3, burner as claimed in claim 1, the skeleton of the arch that it is characterized in that igniting are uniform and is communicated with circle drum (17) and is welded by 3-8 root steel pipe, are to be made by refractory material and encircle.

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