CN201387134Y

CN201387134Y - Triple combustion type dual-drum coal burning boiler

Info

Publication number: CN201387134Y
Application number: CN200920093495U
Authority: CN
Inventors: 任雅琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-23
Filing date: 2009-04-23
Publication date: 2010-01-20
Anticipated expiration: 2019-04-23

Abstract

The utility model discloses a triple combustion type dual-drum coal burning boiler which comprises a dual-drum boiler and a counter-burning hearth and is mainly characterized in that the counter-burning hearth is arranged outside the boiler body and two burnout hearths are arranged between the counter-burning hearth and the boiler body, a flame inlet and a flue gas inlet are arranged respectively between the two burnout hearths and the counter-burning hearth as well as the boiler body, the flame inlet is arranged between the two burnout hearths, the upper part of each burnout hearth is respectively provided with a combustion-supporting pore plate with a flame jet hole, the lower part thereof is provided with a small fire grate, an air compartment, a blast pipe, and a dual-drum boiler; a smoke discharging pipe with an induced draft fan is arranged between the burnout hearth and a chimney arranged on the outer side of the burnout hearth, an upper collecting box and a lower collecting box are respectively arranged on an upper boiler barrel and a lower boiler barrel of the dual-drum boiler, a plurality of water wall tubes are connected between the upper collecting box and the lower collecting box, the other end of a connecting pipe arranged on the lower collecting box is provided with a transverse collecting box, and a plurality of water-cooling fire grate pipes are arranged between the transverse collecting box and the upper boiler barrel. The triple combustion type dual-drum coal burning boiler has the advantages of high-efficiency combustion and low pollution and discharge.

Description

Three burning type bitubular coal-burning boilers

Technical field

The utility model belongs to industry, civil boiler field, is specifically related to a kind of three burning type bitubular coal-burning boilers.

Background technology

At present, common employed double-cylindrical boiler, great majority still adopt the direct combustion system of raw coal, and its combustion system is arranged on the furnace body inside of double-cylindrical boiler, this structure decrease the volume in the boiler, making hot cigarette have little time the completing combustion heat release just is discharged from, not only combustion efficiency is not good, and the thermal efficiency is low, and has wasted the energy, contain a large amount of uncombusted particles in the flue dust that it discharged, severe contamination environment.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and provides a kind of combustion efficiency good, thermal efficiency height, environmentally safe and three burning type bitubular coal-burning boilers that can be energy-conservation.

The purpose of this utility model is achieved in that

It comprises double-cylindrical boiler and the anti-burner hearth that burns, and double-cylindrical boiler comprises the body of heater of establishing upper drum and lower drum, is provided with convection tube and convection pass between upper drum and the lower drum, and body of heater is provided with heat-insulation layer outward; The double-layer grate combustion system that described anti-burning burner hearth is established water-cooled grate tube and fixed grate in being, described anti-burning burner hearth is located at the outside of body of heater, and anti-the burning is provided with the first after-flame burner hearth and the second after-flame burner hearth between burner hearth and the body of heater, the first after-flame burner hearth and anti-first partition wall that is provided with between the burner hearth that burns are provided with first flame inlet, second partition wall that is provided with between the first after-flame burner hearth and the second after-flame burner hearth is provided with second flame inlet, the back wall upside that is provided with between the second after-flame burner hearth and the body of heater is provided with smoke inlet, the first after-flame upper furnace is provided with the first combustion-supporting orifice plate of the first flame spray-hole, the first after-flame burner hearth inside is provided with the porous pallet, the first after-flame lower furnace portion is provided with the first little fire grate, first air compartment, blast pipe, the second after-flame upper furnace is provided with the second combustion-supporting orifice plate of the second flame spray-hole, the second after-flame burner hearth inside is provided with the porous pallet, the second after-flame lower furnace portion is provided with the second little fire grate, second air compartment, blast pipe, be equipped with little fire door on the described first after-flame burner hearth and the second after-flame burner hearth, described first flame inlet is positioned on first partition wall, second flame inlet is positioned on second partition wall, smoke inlet is positioned on the wall of back, the outside of described double-cylindrical boiler also is provided with chimney, be provided with the smoke exhaust pipe of air-introduced machine between chimney and the convection pass, be respectively equipped with upper collecting chamber and next part case on described upper drum and the lower drum, described upper collecting chamber and next part case are connected with a plurality of water screen tubes anti-the burning in the burner hearth, the other end of the tube connector that described next part case is provided with is provided with horizontal collection case, be provided with a plurality of water-cooled grate tubes between horizontal collection case and the upper drum, the airtight water cavity of common formation, constituted water system of the present utility model, the downside of water-cooled grate tube is provided with fixed grate, described anti-burning burner hearth is provided with flame retardant coating and heat-insulation layer from inside to outside, be provided with expansion chamber in the body of heater of described convection tube downside, the anti-burning burner hearth of described water-cooled grate tube upside is provided with upper furnace door, anti-burning burner hearth between water-cooled grate tube and the fixed grate is provided with lower furnace door, the anti-burning burner hearth of fixed grate downside is provided with ash-digging gate, is respectively equipped with little fire door on the first after-flame burner hearth and the second after-flame burner hearth.

Structure of the present utility model has been broken traditional double-cylindrical boiler only is provided with combustion system and only establishes a combustion system in body of heater pattern, it not only is located at combustion system outside the body of heater, and two after-flame burner hearths between combustion system and body of heater, have been set up, so just traditional coal-fired mode is improved to the technology that burning divides three phases to finish: the phase I, coal reverse burning under the air inducing effect on the anti-water-cooled grate tube that burns in the burner hearth, flame is downward through the slit between water-cooled grate tube, with the water of heat in water-cooled grate tube is passed to pipe, its temperature is raise.Second stage, the anti-flame that makes a fire enters the first after-flame burner hearth through first flame inlet, from the air of air blast through blast pipe, first air compartment, the first little fire grate is bottom-up to be blown into a small amount of coke layer that the first after-flame burner hearth lighted and burns, form the environment of first high temperature, come the high temperature of unburnt flue gas in the first after-flame burner hearth of reflexive burning burner hearth and have burning once more under the first combustion-supporting orifice plate comprehensive function of the first flame spray-hole, flame sprays at a high speed through the first flame spray-hole, burning consumingly still contains unburnt black and contains the charcoal particle burning and fall the flue gas that will come in anti-burning burner hearth in this process.Phase III, the flame that the first after-flame burner hearth comes out enters the second after-flame burner hearth through second flame inlet, from the air of air blast through blast pipe, second air compartment, the second little fire grate is bottom-up to blow into a small amount of coke layer that the second after-flame burner hearth is lighted, burn, form the environment of second high temperature, from the first after-flame burner hearth thorough high temperature of flue gas in the second after-flame burner hearth of after-flame and having under the second combustion-supporting orifice plate comprehensive function of the second flame spray-hole not, burn for the third time, owing to be provided with two after-flame burner hearths, increased the program of after-flame, make that boiler not only can smoke abatement and dust control under steady operational status, and under boiler astable operation state, promptly putting a chimney on the stove and make the fire draw when anti-coal seam of burning on the furnace water cooling furnace grate tube, scarfing cinder, again coal, and then the flue gas that is produced when resetting boiler operatiopn, fail the black of thorough after-flame and contain the charcoal particle and thoroughly burnt at anti-burner hearth and the first after-flame burner hearth of burning at the second after-flame burner hearth, produce high-temperature flue gas through three burnings, high-temperature flue gas enters into the expansion chamber of convection tube downside by smoke inlet, entrained solid separate small in the flue gas is gone out, high-temperature flue gas is through convection pass and last afterwards, the outer wall of lower drum and convection tube carry out heat exchange, finish power conversion.Meanwhile, the sulphur-containing substance in the high-temperature flue gas that two after-flame burner hearths produce reacts with the lime stone that is placed on the inner porous pallet of after-flame burner hearth, has reduced the sulfur content of flue gas.

Owing to adopt technique scheme, three burning type bitubular coal-burning boilers that the utility model provides have following advantage: 1, because anti-burning burner hearth is located at the outside of body of heater, so enlarged the inner space of boiler, increased heat exchange area, improved thermal power transfer; 2, owing to realized three burnings, so combustion efficiency is good, thermal efficiency height, not only energy-conservation and help environmental protection; 3, owing in the after-flame burner hearth, be provided with the porous pallet, realized desulfuration in furnace.

Description of drawings;

Fig. 1 is the utility model structural representation;

Fig. 2 is that the A-A of Fig. 1 is to cutaway view.

In Fig. 1 to Fig. 2,1, lower drum, 2, upper drum, 3, convection tube, 4, the next part case, 5, water screen tube, 6, water-cooled grate tube, 7, horizontal collection case, 8, upper collecting chamber, 9, tube connector, 10, upper furnace door, 11, lower furnace door, 12, ash-digging gate, 13, front wall, 14, fixed grate, 15, anti-burner hearth, 16 of burning, double-cylindrical boiler, 17, first flame inlet, 18, first partition wall, 19, the first little fire grate, 20, the first after-flame burner hearth, 21, first air compartment, 22, the first combustion-supporting orifice plate, 23, the first flame spray-hole, 24, smoke inlet, 25, expansion chamber, 26, convection pass, 27, back wall, 28, blast pipe, 29, air blast, 30, smoke exhaust pipe, 31, air-introduced machine, 32, chimney, 33, flame retardant coating, 34, heat-insulation layer, 35, the first little fire door, 36, body of heater, 37, blowoff valve, 38, water-supply valve, 39, air outlet valve, 40, second flame inlet, 41, second partition wall, 42, the second little fire grate, 43, the second after-flame burner hearth, 44, second air compartment, 45, the second combustion-supporting orifice plate, 46, the second flame spray-hole, 47, the second little fire door, 48, the porous pallet.

The specific embodiment

As depicted in figs. 1 and 2, in three burning type bitubular coal-burning boilers that the utility model provides, convection tube 3 and lower drum 1 and upper drum 2 seam, water screen tube 5 and next part case 4 and upper collecting chamber 8 seam, tube connector 9 and

horizontal collection case

7 and 4 seam of next part case, water-cooled grate tube 6 and horizontal collection case 7 and upper drum 2 seam, next part case 4 and lower drum 1 seam, upper collecting chamber 8 and upper drum 2 seam form airtight water cavity jointly, constitute water system of the present utility model.By water-cooled grate tube 6, be arranged on the flame retardant coating 33 in water screen tube 5 outsides, heat-insulation layer 34, the space that the fixed grate 14 of first partition wall 18 and bottom is combined into constitutes the anti-burner hearth 15 that burns, anti-burner hearth 15 bottoms of burning are provided with fixed grate 14, the anti-burning between burner hearth 15 and the body of heater 36 is provided with the first after-flame burner hearth 20 and the second after-flame burner hearth 43, first partition wall 18 will instead burn burner hearth 15 and the first after-flame burner hearth 20 is separated, and be connected by first flame inlet 17, second partition wall 41 that is provided with between the first after-flame burner hearth 20 and the second after-flame burner hearth 43 is provided with second flame inlet 40, forms three combustion systems.By flame retardant coating 33, second partition wall 41, first partition wall 18, front wall 13, back wall 27 and have the first combustion-supporting orifice plate 22 of the first flame spray-hole 23 and first port of bottom row, 19 spaces that are combined into constitute the first after-flame burner hearth 20, its underpart is provided with first air compartment 21 and blast pipe 28, the first after-flame burner hearth, 20 tops are provided with the first combustion-supporting orifice plate 22 with the first flame spray-hole 23, porous pallet 48 has been established in the first after-flame burner hearth, 20 inside, by the flame retardant coating 33 that is arranged on water screen tube 5 outsides, heat-insulation layer 34, first partition wall 18, second partition wall 41, back wall 27 and have the second combustion-supporting orifice plate 45 of the second flame spray-hole 46 and second port of bottom row, 42 spaces that are combined into constitute the second after-flame burner hearth 43, be that its underpart is provided with second air compartment 44 and blast pipe 28, the second after-flame burner hearth, 43 tops are provided with the second combustion-supporting orifice plate 45 with the second flame spray-hole 46, the second after-flame burner hearth, 43 inside are provided with porous pallet 48, smoke inlet 24 is connected with expansion chamber 25, expansion chamber 25 and convection pass 26 are connected, smoke exhaust pipe 30 is connected with convection pass 26 and air-introduced machine 31, air-introduced machine 31 is connected with chimney 32, the blast pipe 28 that is connected with air blast 29 with and first air compartment 21, second air compartment 44 is connected, the anti-burning is provided with indispensable upper furnace door 10 on the burner hearth 15, lower furnace door 11 and ash-digging gate 12, be provided with on the first after-flame burner hearth 20 on the first port door, 35, the second after-flame burner hearths 43 and be provided with the second port door 47.Double-cylindrical boiler also is provided with blowoff valve 37, water-supply valve 38 and air outlet valve 39.

During concrete the use, an amount of coal is rendered on the water-cooled grate tube 6, a small amount of coke is rendered to respectively on first port row, 19 and second port row 42, lime stone is rendered on the porous pallet, light the coke on first port row, 19 and second port row 42 earlier, by air blast 29 through blast pipe 28, first air compartment 21, first port row 19, send in the first after-flame burner hearth 20 and the second after-flame burner hearth 43 with second air compartment 44 and the second port row 42 required air that will burn respectively, coke on first port row, 19 and second port row 42 is burnt rapidly, make the first after-flame burner hearth 20, the second after-flame burner hearth, 43 temperature raise, with flame retardant coating 33 on every side, first partition wall 18 and first combustion-supporting orifice plate 22 heat temperature raisings form the first high-temp combustion environment; Meanwhile, form second hot environment with first partition wall 18, second partition wall 41, flame retardant coating 33 and second combustion-supporting orifice plate 45 heat temperature raisings; Treat that coke burning on first port row, 19 and second port row 42 refires the coal on the water-cooled grate tube 6 after normal, air is under air-introduced machine 31 sucking actions, suck from upper furnace door 10, enter anti-burning burner hearth 15 through coal layer, water-cooled grate tube 6, carry out reverse burning, with the water of heat in water-cooled grate tube 6 is passed to pipe, make its intensification; Come the high temperature of unburnt flue gas the first after-flame burner hearth 20 in of reflexive burning burner hearth 15 and have under first combustion-supporting orifice plate 22 comprehensive functions of the first flame spray-hole 23 to burn once more, flame is through first flame spray-hole 23 ejection at a high speed, burning consumingly, enter the second after-flame burner hearth 43 through second flame inlet 40 again, high temperature in the second after-flame burner hearth 43 and have burning for the third time under second combustion-supporting plate 45 comprehensive functions of the second flame spray-hole 46, flame has been finished the burning of phase III through second flame spray-hole 46 ejection at a high speed.The black particle burning that contains in three times burn flue gas is clean, produce high-temperature flue gas simultaneously, meanwhile, sulphur-containing substance in the high-temperature flue gas of the first after-

flame burner hearth

20 and 43 generations of the second after-flame burner hearth and the lime stone reaction that is placed on the porous pallet 48, realize desulfuration in furnace, reduced the sulfur content of flue gas.High-temperature flue gas enters expansion chamber 25 by smoke inlet 24, because it is big that sectional area becomes suddenly, cigarette speed is fallen and bottom that entrained solid separate small in the high-temperature flue gas is come out to fall expansion chamber 25 suddenly, high-temperature flue gas is through convection pass 26 and upper drum 2 afterwards, the outer wall of lower drum 1 and convection tube 4 carry out heat exchange, finish power conversion, clean flue gas is through smoke exhaust pipe 30, air-introduced machine 31 is sent into chimney 32, be discharged in the atmosphere then, because the flue gas of discharging is clean with the black particle burning, solid particle also is separated, stay in the stove, and realized desulfuration in furnace, thereby discharged flue gas is clean colourless, and people can't see has flue gas discharging on the chimney, thereby has prevented the pollution to environment effectively.

Claims

1, a kind of three burning type bitubular coal-burning boilers, comprise double-cylindrical boiler (16) and the anti-burner hearth (15) that burns, double-cylindrical boiler (16) comprises the body of heater (36) of establishing upper drum (2) and lower drum (1), be provided with convection tube (3) and convection pass (26) between upper drum (2) and the lower drum (1), the outer heat-insulation layer (34) that is provided with of body of heater (36); The double-layer grate combustion system that described anti-burning burner hearth (15) is established water-cooled grate tube (6) and fixed grate (14) in being, it is characterized in that, described anti-burning burner hearth (15) is located at the outside of body of heater (36), and anti-the burning is provided with the first after-flame burner hearth (20) and the second after-flame burner hearth (43) between burner hearth (15) and the body of heater (36), the first after-flame burner hearth (20) and anti-first partition wall (18) that is provided with between the burner hearth (15) that burns are provided with first flame inlet (17), second partition wall (41) that is provided with between the second after-flame burner hearth (43) and the first after-flame burner hearth (20) is provided with second flame inlet (40), back wall (27) upside that is provided with between the second after-flame burner hearth (43) and the body of heater (36) is provided with smoke inlet (24), first after-flame burner hearth (20) top is provided with the first combustion-supporting orifice plate (22) of the first flame spray-hole (23), first after-flame burner hearth (20) inside is provided with porous pallet (48), first after-flame burner hearth (20) bottom is provided with the first little fire grate (19), first air compartment (21), blast pipe (28), the other end of blast pipe (28) is provided with air blast (29), second after-flame burner hearth (43) top is provided with the second combustion-supporting orifice plate (45) of the second flame spray-hole (46), second after-flame burner hearth (43) inside is provided with porous pallet (48), second after-flame burner hearth (43) bottom is provided with the second little fire grate (42), second air compartment (44), blast pipe (28), the described first after-flame burner hearth (20) is provided with the first little fire door (35), the described second after-flame burner hearth (43) is provided with the second little fire door (47), described first flame inlet (17) is positioned on first partition wall (18) between the first little fire grate (19) and the first combustion-supporting orifice plate (22), described second flame inlet (40) is positioned on second partition wall (41) between the second combustion-supporting orifice plate (45) and the first combustion-supporting orifice plate (22), smoke inlet (24) is positioned at the upside of the second combustion-supporting orifice plate (45), the outside of described double-cylindrical boiler (16) also is provided with chimney (32), be provided with the smoke exhaust pipe (30) of air-introduced machine (31) between chimney (32) and the convection pass (26), be respectively equipped with upper collecting chamber (8) and next part case (4) on described upper drum (2) and the lower drum (1), described upper collecting chamber (8) and next part case (4) are connected with a plurality of water screen tubes (5) anti-the burning in the burner hearth (15), the other end of the tube connector (9) that described next part case (4) is provided with is provided with horizontal collection case (7), be provided with a plurality of water-cooled grate tubes (6) between horizontal collection case (7) and the upper drum (2), the downside of water-cooled grate tube (6) is provided with fixed grate (14), described anti-burning burner hearth (15) is provided with flame retardant coating (33) and heat-insulation layer (34) from inside to outside, be provided with expansion chamber (25) in the body of heater (36) of described convection tube (3) downside, the anti-burning burner hearth (15) of described water-cooled grate tube (6) upside is provided with upper furnace door (10), anti-burning burner hearth (15) between water-cooled grate tube (6) and the fixed grate (14) is provided with lower furnace door (11), the anti-burning burner hearth (15) of fixed grate (14) downside is provided with ash-digging gate (12), the first after-flame burner hearth (20) is provided with the first little fire door (35), and the second after-flame burner hearth (43) is provided with the second little fire door (47).