CN204922946U - Utilize two -stage of fever fin formula water pipe grate that is all -trans to preheat wind boiler - Google Patents

Abstract

The utility model belongs to the technical field of fire coal, coke and biomass fuel furnace, for the potential safety hazard problem of solving the extravagant energy, polluted environment and existence that current anti - enamelware pot stove exists, and then provide an utilize two -stage of fever fin formula water pipe grate that is all -trans to preheat wind boiler, this boiler adopts the anti - crescent fin formula water pipe grate that burns, and the play that has increased the grate on the basis of the grate area equally greatly sectional area of angering has improved burning rate and combustion temperature, the utility model discloses still adopt preheating zone and cubic air door structure, make can to make the furnace temperature rise through preheating in the air intake sends into furnace through the steam after preheat in the preheating of air district, greatly increased the area of contact of hot oxygen with fuel to can guarantee flue gas abundant after -flame after a lot of wind is combustion -supporting, improve the utilization ratio of fuel, reduce exhaust gas temperature, not contain CO in messenger's exhaust flue gas, realize clean burning, solve simultaneously because of containing the potential safety hazard that the toxic gas exists in the flue gas.

Description

A kind of utilization is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate

Technical field

The utility model belongs to coal-fired, the technical field of coke and biomass fuel boiler, is specifically related to a kind of utilization and is all-trans and burns the pre-hot air boiler of two-stage of fin type water pipe furnace grate.

Background technology

During existing back firing boiler burning, because the actual internal area that fires is little, fire not smooth, flue gas resistance is large, and fire box temperature is low, causes the burn-off rate of fuel low, wastes energy.And fly particle containing a certain proportion of CO and a large amount of ash in flue gas after burning, both not environmentally, affect again the service life of the up to standard and blower fan of desulfurating dust-removing equipment in postorder, especially at the workshop that air draft is not smooth, the leakage accumulation of CO can cause staff poisoning, there is serious potential safety hazard.

Existing back firing boiler is from structure, and structure does not simply have the heat absorption combination of water-fire pipe, does not increase afterbody preheating zone yet, causes existing back firing boiler not energy efficient to waste energy.

Summary of the invention

The utility model in order to solve that existing back firing boiler exists waste energy, the security hidden trouble of contaminated environment and existence, and then provide a kind of utilization and be all-trans and burn the pre-hot air boiler of two-stage of fin type water pipe furnace grate.

The utility model adopts following technical scheme:

A kind of utilization is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, comprise the body of heater be made up of inner bag and shell body and the base supporting body of heater, described furnace interior is divided into feed compartment through successively, combustion chamber, heat absorption district and air preheating area by keeping off cigarette return facilities, anti-burning fin type water pipe furnace grate, gear cigarette backhaul plate and burner hearth backhaul plate, be provided with some endothermic tubes in described heat absorption district, the bottom of combustion chamber is provided with crater;

The sidewall bottom of described body of heater is provided with the dust removal port through with district of absorbing heat, water return outlet and sewage draining exit; The top side wall of body of heater is provided with the flue gas diffusion mouth through with feed compartment; The side wall upper part of body of heater is provided with the clear dirt through with district of absorbing heat and inspection door;

The sidewall of the furnace body that described feed compartment is corresponding is provided with charge door, deashing and inspection socket and some preheating air inlets and secondary preheating air inlet, and sidewall of the furnace body corresponding to described combustion chamber is provided with shoot door and tertiary air door.

Smoke box and openend U-shaped smoke barrier is down provided with out in described air preheating area, sidewall of the furnace body bottom corresponding to air preheating area is provided with outlet flue and cold wind import, the outlet flue in heat absorption district successively through the inner side flue of U-shaped smoke barrier, outside flue again with smoke upper box part to enter smoke box mouth through, the bottom and the outlet flue that go out smoke box are through, and the outside stack base of described U-shaped smoke barrier is the gray area that falls;

Described go out the both sides of smoke box be respectively equipped with air intake baffle plate, air channel, inner side and the air channel, outside of two air intake baffle plates are through at the top of air intake baffle plate, inner side air channel and cold wind import through, air channel, outside is through by the hot bellows of the pre-hot-air mouth bottom it and bottom of furnace body, and hot bellows is through through preheating air inlet, secondary preheating air inlet and a feed compartment again.

The bottom of described body of heater is also provided with water seal and falls ashpit, body of heater bottom surface has ash port and connected entrance, and the water seal ashpit that falls is through with combustion chamber, the gray area that falls respectively by ash port, connected entrance, and described ash port and connected entrance place are provided with hinge-type water seal board.

Described body of heater top is provided with water tank, and each endothermic tube is connected with water tank, is provided with water-level gauge in water tank, and the shell body sidewall at water tank place has delivery port, shell body roof has the air connector through with water tank.

It is through that described flue gas diffusion mouth passes through smoke exhaust pipe or heat absorption district and feed compartment.

Be provided with threaded flue between described heat absorption district and air preheating area, threaded flue is connected with the water-cooled smoke box on sidewall of the furnace body.

Described anti-burning fin type water pipe furnace grate by some extended surface tubes side by side gap weldig form, welded gaps between adjacent fin pipe forms ventilation section, extended surface tube comprises water cooling tube and horizontal symmetrical and is welded in some fins on water cooling tube outer wall, described fin is arranged along water cooling tube axis direction spaced set two, the axis of each fin and water cooling tube is in same plane, the solder side of described fin is crescent, and the side relative with solder side is the fin head of rounding; Described anti-burning fin type water pipe furnace grate is obliquely installed along water cooling tube axis direction.

Described gear cigarette return facilities is obliquely installed, and the one end be connected with burner hearth backhaul plate end is high-end, and crater is located at the low side of gear cigarette return facilities.

Described gear cigarette return facilities is welded side by side by some gear flue and water pipes.

Described gear cigarette return facilities is box backhaul water jacket.

The utility model is according to there being the following beneficial effect of people:

1, the utility model adopts and anti-burns crescent fin type water pipe furnace grate, and the ventilation section sum that the basis of same grate area increases fire grate greatly fires sectional area, improves burning velocity and ignition temperature;

2, the utility model adopts air preheating area and tertiary air door, and before boiler, after, left, right wall is equipped with a preheating air inlet through with air preheating area and secondary preheating air inlet, after hot-air sends into burner hearth, fire box temperature is raised, considerably increase the contact area of hot oxygen and fuel, and can ensure that flue gas is at the repeatedly combustion-supporting rear abundant after-flame of wind, improve the utilization rate of fuel, reduce exhaust gas temperature, make in the flue gas of discharge not containing CO, achieve clean combustion, more meet environmental requirement, solve the potential safety hazard because existing containing toxic gas in flue gas simultaneously,

Be provided with arc in the air preheating area of 3, this boiler, square zig zag falls gray area, reduce the actual internal area of flue gas, flue gas flow rate is increased, can effectively remove fly ash granule larger in flue gas, thus making the dustiness at boiler flue gas outlet place and little, the wet dedusting for the later stage is up to standard lays a good foundation, and then decreases the wearing and tearing of flying dust to blower fan, and dust etc. can through water seal fall ashpit precipitation collect, further increase the environment for use of boiler;

4, the top and the bottom of boiler furnace and left and right sides to the rear are equipped with cleaning door, are conducive to the dust cleared up in time in body of heater;

5, the inner chamber top of body of heater is provided with and multiplely diffuses sealing, can play the effect that flue gas diffuses, achieve the safe operation of boiler in blowing out with when banking up a fire;

6, boiler described in the utility model is from being provided with water tank, and water circulates between water tank and endothermic tube, compact conformation, and the thermal efficiency of boiler is high;

7, boiler described in the utility model can adopt conventional steels or foundry goods, is applicable to various combustion apparatus, use fuel and medium all unrestricted, be applicable to promoting the use of.

Accompanying drawing explanation

Fig. 1 is the main sectional view of scheme one;

Fig. 2 is the sectional view of scheme one;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is the sectional view of bowing of Fig. 1;

Fig. 5 is the front view of scheme two;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is the flue figure of air preheating area;

Fig. 8 is the air channel figure of air preheating area;

Fig. 9 is anti-structural front view of burning fin type water pipe furnace grate (7);

Figure 10 is the anti-structure sectional view burning fin type water pipe furnace grate (7);

1-base, 2-crater, 3-keeps off cigarette return facilities, 4-shoot door, 5-combustion chamber, 6-tertiary air door, 7-is counter burns fin type water pipe furnace grate, 8-feed compartment, 9-deashing and inspection socket, 10-charge door, 11-fire door, 14-puts ash and flue gas diffusion mouth, 15-adjustable plate, the clear dirt of 16-and inspection door, 17-keeps off cigarette backhaul plate, 18-endothermic tube, 19-inner bag, 20-air connector, 21-water tank, 22-shell body, 23-flue gas diffusion mouth, 25-outlet flue, 27-burner hearth backhaul plate, 28-connected entrance, 29-dust removal port, 30-absorbs heat district, 32-ash port, 33-water seal board, 34-water seal falls ashpit, 35-water return outlet, 36-sewage draining exit, 38-delivery port, 39-water-level gauge, 40-smoke exhaust pipe, 41-water-cooled smoke box, 42-threaded flue, 43-preheating air inlet, 44-secondary preheating air inlet, 45-falls gray area, 47-enters smoke box mouth, the import of 49-cold wind, 51-air intake baffle plate, the pre-hot-air mouth of 54-, 55-goes out smoke box, 56-U type smoke barrier, 57-hot bellows,

71-fin, 72-water cooling tube, 73-ventilation section.

Detailed description of the invention

Embodiment 1

A kind of utilization is as shown in Figure 1,2,3, 4 all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, comprise the body of heater be made up of inner bag 19 and shell body 22 and the base 1 supporting body of heater, described furnace interior is divided into feed compartment 8 through successively, combustion chamber 5, heat absorption district 30 and air preheating area by keeping off cigarette return facilities 3, anti-burning fin type water pipe furnace grate 7, gear cigarette backhaul plate 17 and burner hearth backhaul plate 27, be provided with some endothermic tubes 18 in described heat absorption district 30, the bottom of combustion chamber 5 is provided with crater 2.Feed compartment 8 and combustion chamber 5 are separated by the anti-fin type water pipe furnace grate 7 that burns, feed compartment 8 is positioned at above combustion chamber 5, heat absorption district 30, air preheating area are positioned at the side of feed compartment-combustion chamber, furnace interior is made to form horizontal three regions, heat absorption district 30 and feed compartment-combustion chamber are by keeping off cigarette return facilities 3 and vertical burner hearth backhaul plate 27 is separated, and heat absorption district 30 and air preheating area are separated by vertical gear cigarette backhaul plate 17.

The sidewall bottom of described body of heater is provided with the dust removal port 29 through with district 30 of absorbing heat, water return outlet 35 and sewage draining exit 36; The top side wall of body of heater is provided with the flue gas diffusion mouth 23 through with feed compartment 8; The side wall upper part of body of heater is provided with the clear dirt through with district 30 of absorbing heat and inspection door 16;

The sidewall of the furnace body of described feed compartment 8 correspondence is provided with charge door 10, deashing and inspection socket 9 and some preheating air inlets 43 and secondary preheating air inlet 44, and the sidewall of the furnace body of described combustion chamber 5 correspondence is provided with shoot door 4 and tertiary air door 6.Utilize deashing and inspection socket, shoot door can clear up dust in feed compartment and combustion chamber in time, be conducive to the Thorough combustion of fuel, play the effect that flue gas diffuses simultaneously in blowing out or when banking up a fire.A preheating air inlet and secondary preheating air inlet are distributed on the front, rear, left and right sidewall of body of heater, can cause in feed compartment by hot-air, considerably increase the contact area of hot oxygen and fuel, make oxygen supply fully realize clean combustion; Utilize tertiary air door to regulate to make after primary combustion, containing the flue gas of certain proportion CO after-flame completely again in combustion chamber, to discharge pure qi (oxygen), realize the clean combustion of boiler to air quantity.All control valve is installed in preheating air inlet, secondary preheating air inlet and a tertiary air door, suitable unlatching quantity and position can be selected according to actual needs.

Be provided with threaded flue 42 between described heat absorption district 30 and air preheating area, threaded flue 42 is connected with the water-cooled smoke box 41 on sidewall of the furnace body.

Smoke box 55 and openend U-shaped smoke barrier 56 is down provided with out in described air preheating area, sidewall of the furnace body bottom corresponding to air preheating area is provided with outlet flue 25 and cold wind import 49, the outlet flue in heat absorption district 30 successively through the inner side flue of U-shaped smoke barrier 56, outside flue again with go out smoke box 55 top to enter smoke box mouth 47 through, the bottom and the outlet flue 25 that go out smoke box 55 are through, and the outside stack base of described U-shaped smoke barrier 56 is the gray area 45 that falls.Flue gas flow direction in air preheating area is as shown in the direction, front in Fig. 7, flue gas enters the outside flue of U-shaped smoke barrier 56 by the outlet of threaded flue 42, flue gas from top to bottom enters gray area 45 by the sharp turn of U-shaped smoke barrier 56, enter the inner side flue of U-shaped smoke barrier 56 again, flue gas from bottom to top passes through to enter out in smoke box 55 into smoke box mouth 47, and flue gas from top to bottom enters outside desulfurizer through outlet flue 25 again.

Described go out the both sides of smoke box 55 be respectively equipped with air intake baffle plate 51, air channel, inner side and the air channel, outside of two air intake baffle plates 51 are through at the top of air intake baffle plate 51, inner side air channel and cold wind import 49 through, air channel, outside is through with the hot bellows 57 of bottom of furnace body by the pre-hot-air mouth 54 bottom it, and hot bellows 57 is through through preheating air inlet 43, secondary preheating air inlet 44 and a feed compartment 8 again.The air channel, inner side that cold air is entered two air intake baffle plates 51 by the cold wind import 49 bottom sidewall of the furnace body and gone out between smoke box 55, cold air is reverse from bottom to top flows to air intake baffle plate 51 top, air channel, outside again outside two air intake baffle plates 51 is from top to bottom entered in hot bellows 57 by the pre-hot-air mouth 54 of both sides carries out preheating, hot-air after preheating can enter in feed compartment 8 combustion-supporting through preheating air inlet 43, a secondary preheating air inlet 44, realize two-stage preheat function, make full combustion of fuel, improve the burn-off rate of fuel.The flow direction of hot-air is as shown in the direction of arrow in Fig. 8, and wherein, one time preheating air inlet 43, secondary preheating air inlet 44 can be opened simultaneously, also can gradation open.

The bottom of described body of heater is also provided with water seal and falls ashpit 34, body of heater bottom surface has ash port 32 and connected entrance 28, the water seal ashpit 34 that falls is through with combustion chamber 5, the gray area 45 that falls respectively by ash port 32, connected entrance 28, and described ash port 32 and connected entrance 28 place are provided with hinge-type water seal board 33.Most of dust in flue gas to be fallen ashpit 34 sedimentation pump drainage by water seal, and hinge-type water seal board 33 only just can be opened in the operation of dust gravity, effectively can prevent flue gas from directly entering water seal through ash port 32 and fall in ashpit 34.

Described body of heater top is provided with water tank 21, water tank 21 can be arranged in the cavity between inner bag 19 and shell body 22 roof, the cavity that inner bag 19 and shell body 22 roof are formed after installing also can directly use as water tank, each endothermic tube 18 is connected with water tank 21, water circulates between endothermic tube 18 and water tank 21, cyclic process is lowered the temperature to flue gas, water-level gauge 39 is provided with in water tank 21, to observe the water level in water tank, and by delivery port 38 pump drainage on shell body 22 sidewall or make-up water, on shell body 22 roof, also have the air connector 20 through with water tank 21 simultaneously, prevent from being unfavorable for observing the state in water tank because water temperature raises generation fog.

The sidewall bottom of described body of heater is provided with the dust removal port 29 through with district 30 of absorbing heat, water return outlet 35 and sewage draining exit 36, can clear up the dust, ponding etc. of bottom of furnace body in real time; The side wall upper part of body of heater is provided with the clear dirt through with district 30 of absorbing heat and inspection door 16, utilizes this opening can clear up dust above stove endothermic tube 18, and whether have damage and in time change, ensure the thermal efficiency of boiler if detecting endothermic tube 18; The top side wall of body of heater is provided with flue gas diffusion mouth 23, and flue gas diffusion mouth 23 is through by smoke exhaust pipe 40 and feed compartment 8, can directly discharge through smoke exhaust pipe 40 flue gas in feed compartment 8.

As Fig. 9, shown in 10, described anti-burning fin type water pipe furnace grate 7 by some extended surface tubes side by side gap weldig form, welded gaps between adjacent fin pipe forms ventilation section 73, extended surface tube comprises water cooling tube 72 and horizontal symmetrical and is welded in some fins 71 on water cooling tube 72 outer wall, described fin 71 is arranged along water cooling tube 72 axis direction spaced set two, each fin 71 is in same plane with the axis of water cooling tube 72, the solder side of described fin 71 is crescent, the side relative with solder side is the fin head of rounding, the thickness of fin is 8-10mm, be highly 40mm, fin head is 30-35mm to the distance at welding center, namely the beeline between fin head and water cooling tube, the width of ventilation section is 20-25mm, and this width distance effectively can increase ventilation, is conducive to the Thorough combustion of fuel.Therefore on the basis of same grate area, greatly increase the sectional area that fires of fire grate, the resistance that flue gas moves downward reduces, and increased flame speeds, improves burning velocity and ignition temperature.The structure of fin is crescent, compared with the rectangular fin of tradition, one adds and the contact area of water cooling tube and weld strength, it two is convenient to deashing and disclose fire, it three adds ventilation more, its four service life extending fire grate, its five, unburnt fuel can be stoped to leave out by mistake by the structure interval rationally between effective crescent fin and waste energy.

Fin and water cooling tube are vertical Welding Structure, along its axis direction welding two row fin on every root water cooling tube, two row's fins are symmetrical and be in same plane with the axis of water cooling tube, 30mm is set to along adjacent two fins of water cooling tube axis direction, such design had both been conducive to contact area when welding with water cooling tube, increase weld strength, be conducive to again deashing simultaneously and increase ventilation.

Described anti-burning fin type water pipe furnace grate 7 is obliquely installed along water cooling tube 72 axis direction, and angle of inclination, direction are determined according to the degree of depth of burner hearth and water circulation direction.

Described gear cigarette return facilities 3 is obliquely installed, and the one end be connected with burner hearth backhaul plate 27 end is high-end, and room crater 2 is located at the low side of gear cigarette return facilities 3.Make the dust after burning vertically drop down onto ash port 32 along the crater 2 that falls again through combustion chamber of gear cigarette return facilities 3 tilted, finally enter the water seal ashpit 34 that falls and carry out precipitation pump drainage.

Gear cigarette return facilities 3 can by some gear flue and water pipes side by side oblique weld in the end of burner hearth backhaul plate 27, as shown in Figure 5,6; Also can adopt backhaul water jacket, this backhaul water jacket is flat structure, is also oblique weld, as shown in Figure 1, 2.Gear flue and water pipe and backhaul water jacket are all to make the flue gas after combustion chambers burn take a sudden turn to district of absorbing heat through narrow combustion chamber crater 2, and keep off in flue and water pipe and backhaul water jacket by water tank circulation water storage, play cooling effect, the angle of inclination of gear cigarette return facilities 3 is also determined according to furnace depth and water circulation direction.

The specific works principle of scheme one is:

Fuel enters on the anti-burning fin type water pipe furnace grate 7 of feed compartment 8 by charge door 10, under the effect of extraneous air inducing and primary air regulator 12, flue gas after burning enters combustion chamber 5 through after red-hot coke layer, flue gas enters heat absorption district 30 by the crater 2 of combustion chamber, carry out heat exchange with the endothermic tube 18 in heat absorption district 30, dust drains into water seal through crater 2, ash port 32 and to fall ashpit 34; Flue gas is lowered the temperature up in heat absorption district 30, after entering the threaded flue 42 of lower row, enters water-cooled smoke box 15 depositing dust again, and then the threaded flue 42 of the row of entering carries out heat exchange arrival air preheating area.After entering air preheating area, flue gas enters in outside wet type dedusting devulcanizer according to the flue stream in Fig. 7 shown in arrow to finally by outlet flue 25, realize the environmental protection and energy saving operational effect of smokeless and dust free, the dust in flue gas then enters water seal through the gray area 45 that falls to fall in ashpit 34 to carrying out precipitation pump drainage.In order to realize the Thorough combustion of fuel, the cold air of outside is drawn in air preheating area by the cold wind import 49 bottom sidewall of the furnace body and carries out preheating, again the hot-air after preheating can be entered in feed compartment 8 combustion-supporting through preheating air inlet 43, a secondary preheating air inlet 44, coordinate the tertiary air door 6 on the sidewall of the furnace body of combustion chamber 5 correspondence to make unburnt CO in flue gas again carry out Thorough combustion, hot-air is shown in air channel according to arrow in Fig. 8 and circulates simultaneously.Repeatedly preheated-combustion-supporting can be carried out, till making the complete after-flame of fuel in practical operation.

Embodiment 2

Scheme two boiler structure schematic diagram as shown in Figure 5,6, what also have some through feed compartment 8 and heat absorption district 30 on the top of described burner hearth backhaul plate 27 puts ash and flue gas diffusion mouth 14, puts ash and flue gas diffusion mouth 14 is provided with adjustable plate 15.Blowing out or when banking up a fire, opens the adjustable plate 15 put on ash and flue gas diffusion mouth 14, opens the control valve at flue gas diffusion mouth 23 place simultaneously, and close the valve of primary air regulator 12, open the secondary air register 6 of combustion chamber, allows residual air discharge and realizes safe operation.

It can thus be appreciated that scheme two (embodiment 2) is distinguished with the structure of scheme one (embodiment 1) and is:

1, the inner bag in scheme one is polymorphic structure, namely directly gear cigarette backhaul plate 17 and burner hearth backhaul plate 27 is become one with inner bag 19, then is installed on shell body 22 inside and forms the internal cavities such as body of heater, burner hearth; And gear cigarette backhaul plate 17, burner hearth backhaul plate 27 and the inner bag 19 in scheme two is individual member, be formed by connecting by assembly welding.But the gear cigarette backhaul plate 17 in two schemes should be identical with installation direction with burner hearth backhaul plate 27 setting position, namely should ensure that feed compartment that furnace interior is separated into, combustion chamber, heat absorption district are identical with through order with the position of air preheating area.

2, the heat absorption district of scheme two kinds be directly and air preheating area through, and district of absorbing heat in scheme one is through with air preheating area again through threaded flue 42, water-cooled smoke box 41.

3, the flue gas of feed compartment diffuses path difference: the flue gas diffusion mouth 23 in scheme one is direct by smoke exhaust pipe 40 and feed compartment 8 is through; And the flue gas in feed compartment 8 in scheme two is by putting after ash and flue gas diffusion mouth 14 enter heat absorption top, district set by burner hearth backhaul plate 27 top, discharge through flue gas diffusion mouth 23, the flue gas diffusion mouth 23 namely in scheme two is through with feed compartment 8 by heat absorption district 30 again.

The structure of 4, keeping off cigarette return facilities is different: be the bottom adopting backhaul water jacket directly to tilt to be connected to burner hearth backhaul plate 27 in scheme one, more compact structure, installs also more convenient; And scheme two be by some gear flue and water pipes side by side oblique weld in the bottom of burner hearth backhaul plate 27.

Because of the more compact structure of scheme one, so scheme one is preferred version, scheme two optionally.

Boiler described in the utility model can be adapted to heating furnace, heating stove, steam oven and various combustion apparatus etc.; Fuel can be coal, coke, biomass fuel, moulded coal etc.; Manufacture material and can be steel and foundry goods etc.Medium can be water, conduction oil, air etc.

Wherein, the component not making specified otherwise in the utility model is prior art.

Claims (10)

1. a utilization is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, comprise the body of heater be made up of inner bag (19) and shell body (22) and the base (1) supporting body of heater, it is characterized in that: described furnace interior is by keeping off cigarette return facilities (3), anti-burning fin type water pipe furnace grate (7), gear cigarette backhaul plate (17) and burner hearth backhaul plate (27) are divided into feed compartment (8) through successively, combustion chamber (5), heat absorption district (30) and air preheating area, in described heat absorption district (30), some endothermic tubes (18) are installed, the bottom of combustion chamber (5) is provided with crater (2),

The sidewall bottom of described body of heater is provided with the dust removal port (29) through with district of absorbing heat (30), water return outlet (35) and sewage draining exit (36); The top side wall of body of heater is provided with the flue gas diffusion mouth (23) through with feed compartment (8); The side wall upper part of body of heater is provided with the clear dirt through with district of absorbing heat (30) and inspection door (16);

The sidewall of the furnace body that described feed compartment (8) is corresponding is provided with charge door (10), deashing and inspection socket (9) and some preheating air inlets (43) and secondary preheating air inlet (44), and the sidewall of the furnace body of described combustion chamber (5) correspondence is provided with shoot door (4) and tertiary air door (6).

2. utilization according to claim 1 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: in described air preheating area, be provided with out smoke box (55) and openend U-shaped smoke barrier (56) down, sidewall of the furnace body bottom corresponding to air preheating area is provided with outlet flue (25) and cold wind import (49), the outlet flue of heat absorption district (30) is successively through the inner side flue of U-shaped smoke barrier (56), outside flue again with go out smoke box (55) top to enter smoke box mouth (47) through, the bottom and the outlet flue (25) that go out smoke box (55) are through, the outside stack base of described U-shaped smoke barrier (56) is the gray area that falls (45),

Described go out the both sides of smoke box (55) be respectively equipped with air intake baffle plate (51), air channel, inner side and the air channel, outside of two air intake baffle plates (51) are through at the top of air intake baffle plate (51), inner side air channel and cold wind import (49) through, air channel, outside is through with the hot bellows (57) of bottom of furnace body by the pre-hot-air mouth (54) bottom it, and hot bellows (57) is through through preheating air inlet (43), secondary preheating air inlet (44) and a feed compartment (8) again.

3. utilization according to claim 2 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: the bottom of described body of heater is also provided with water seal and falls ashpit (34), body of heater bottom surface has ash port (32) and connected entrance (28), the water seal ashpit (34) that falls is through with combustion chamber (5), the gray area that falls (45) respectively by ash port (32), connected entrance (28), and described ash port (32) and connected entrance (28) place are provided with hinge-type water seal board (33).

4. utilization according to claim 3 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described body of heater top is provided with water tank (21), each endothermic tube (18) is connected with water tank (21), water-level gauge (39) is provided with in water tank (21), shell body (22) sidewall at water tank (21) place has delivery port (38), shell body (22) roof has the air connector (20) through with water tank (21).

5. utilization according to claim 4 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described flue gas diffusion mouth (23) by smoke exhaust pipe (40) or heat absorption district (30) through with feed compartment (8).

6. utilization according to claim 5 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: be provided with threaded flue (42) between described heat absorption district (30) and air preheating area, threaded flue (42) is connected with the water-cooled smoke box (41) on sidewall of the furnace body.

7. utilization according to claim 1 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described anti-burning fin type water pipe furnace grate (7) by some extended surface tubes side by side gap weldig form, welded gaps between adjacent fin pipe forms ventilation section (73), extended surface tube comprises water cooling tube (72) and horizontal symmetrical and is welded in some fins (71) on water cooling tube (72) outer wall, described fin (71) is arranged along water cooling tube (72) axis direction spaced set two, each fin (71) is in same plane with the axis of water cooling tube (72), the solder side of described fin (71) is crescent, the side relative with solder side is the fin head of rounding, described anti-burning fin type water pipe furnace grate (7) is obliquely installed along water cooling tube (72) axis direction.

8. utilization according to claim 1 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described gear cigarette return facilities (3) is obliquely installed, the one end be connected with burner hearth backhaul plate (27) end is high-end, and crater (2) is located at the low side of gear cigarette return facilities (3).

9. utilization according to claim 8 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described gear cigarette return facilities (3) is welded side by side by some gear flue and water pipes.

10. utilization according to claim 8 is all-trans and is burnt the pre-hot air boiler of two-stage of fin type water pipe furnace grate, it is characterized in that: described gear cigarette return facilities (3) is box backhaul water jacket.