CN207330861U

CN207330861U - A kind of biomass carbonization preparation facilities

Info

Publication number: CN207330861U
Application number: CN201721448158.0U
Authority: CN
Inventors: 廖伟元
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2018-05-08
Anticipated expiration: 2027-11-03

Abstract

The utility model discloses a kind of biomass carbonization preparation facilities；Belong to technical field of renewable energy sources；Technical points include rack, and conveyer belt is equipped with rack, are sequentially equipped with heating zone, delivery area and combustion zone along conveying tape feeding direction, the cooling chamber that connection is turned on combustion zone is equipped with the downside of combustion zone；The heating zone include heating chamber, along its length be located at heating it is indoor heating bed and be located at heating bed on the upside of and with the matched conveying harrow frame of conveyer belt；The heating chamber is equipped with and the matched feed inlet of conveyer belt；The conveying harrow frame end is opposite with delivery area feed end；The combustion zone includes turning on the reative cell of connection with delivery area and is located at the indoor collecting mechanism of reaction, and the reative cell top, which is respectively turned on, is connected with air intake duct and Gas Pipe；The utility model aims to provide a kind of easy to use, biomass carbonization preparation facilities for working well；It is used to prepare biomass carbon.

Description

A kind of biomass carbonization preparation facilities

Technical field

A kind of preparation facilities is the utility model is related to, more specifically, more particularly to a kind of biomass carbonization preparation facilities.

Background technology

Carbon research is the frontier science and technology that China is initiated in recent years, is also fallen behind very compared with China of the advanced country such as U.S. More, carbon, because purposes is different, property is different, and source is different, and species is various, and carbon is examined as burnt, bamboo carbon, peanut shell carbon, water Hu reed carbon, Cow dung carbon, solid wood carbon etc., biomass carbon are activated carbon, are that the mineral such as coal, coke carbon cannot pretend to be replacement.

Biomass carbon purposes is more and more wider, and to so far, China is also without real biomass carbon production line.Ox Excrement is agricultural, the discarded object of aquaculture, and source is wide, rich in lignocellulosic, and carbon forming rate is up to more than percent 40.Cow dung carbon is lived Property it is high, it is pure natural high with regard to surface area ratio.Be make ultracapacitor (capacitance carbon) most one of ideal material, capacitance carbonaceous value Liancheng.

But during biomass heats rising acquisition biological carbon, a large amount of biomass gas are produced, these biogas When body is cooled to cloud point temperature, a large amount of smog or tar can be produced, while polluting environment, are also difficult to handle.Meanwhile biomass Based on Kohlenhydrate, rising gas water content is more, and fuel value is low, it is difficult to using in biomass carbon production process, it is necessary to disappear Consume the more energy.

Utility model content

The purpose of this utility model is that in view of the above shortcomings of the prior art, there is provided one kind is easy to use, works well Biomass carbonization preparation facilities.

What the technical solution of the utility model was realized in：A kind of biomass carbonization preparation facilities, including rack, in machine Frame is equipped with conveyer belt, is sequentially equipped with heating zone, delivery area and combustion zone along conveying tape feeding direction, is equipped with the downside of combustion zone The cooling chamber of connection is turned on combustion zone；The heating zone includes heating chamber, is located at the indoor heating bed of heating along its length And be located at heating bed on the upside of and with the matched conveying harrow frame of conveyer belt；The heating chamber is equipped with matched with conveyer belt Feed inlet；The conveying harrow frame end is opposite with delivery area feed end；The combustion zone includes turning on the anti-of connection with delivery area Answer room and be located at the indoor collecting mechanism of reaction, the reative cell top, which is respectively turned on, is connected with air intake duct and Gas Pipe.

In a kind of above-mentioned biomass carbonization preparation facilities, it is described conveying harrow frame by be located at heating bed on the upside of mounting bracket, The the first rake group and the second rake group that are located on mounting bracket and it is located on the outside of heating chamber and drives the first rake group, the second rake group respectively The two driving motors composition rotated, the first rake group are inclined on mounting bracket, and the second rake group is horizontally disposed On the upside of heating bed.

In a kind of above-mentioned biomass carbonization preparation facilities, the first, second rake group is located on mounting bracket by interval Two rotation axis, be distributed in each rotation axis and correspond along rotation axis axially spaced-apart coordinate gear, around being located at correspondence Driving chain and the connecting plate being located on adjacent drive chain and the rake teeth group being located on connecting plate between two gears Into the first, second one of rotation axis of rake group and corresponding driving motor connection.

In a kind of above-mentioned biomass carbonization preparation facilities, hot gas air inlet is equipped with heating bed lower face, in the first rake Some hot gas gas outlets are distributed with the heating bed of group downside, each hot gas gas outlet cooperatively forms and the first matched rank of rake group Ladder type structure.

In a kind of above-mentioned biomass carbonization preparation facilities, the cooling chamber is arranged in ground, in reative cell inner bottom surface Equipped with the discharge hole that connection is turned on cooling chamber；The collecting mechanism is by being located at electric rotating machine on the downside of cooling chamber, being located at rotation Lifting hydraulic cylinder on the downside of motor, with the rotating bar of electric rotating machine power output axis connection, be located at rotating bar and extend to discharge hole Worm gear on the end of upside, the stent being located in the rotating bar of worm gear side, opposite be located on stent and with the two of worm gear A worm screw and the first harrow frame composition for being located at corresponding worm screw free end；Guiding mechanism is equipped between rotating bar and reative cell.

In a kind of above-mentioned biomass carbonization preparation facilities, the guiding mechanism includes being located between worm gear and reative cell Guide plate in rotating bar, be located at some first guide rods of reative cell inner bottom surface and be located at each first guide rod through being oriented to The first limited block on the end of plate；Guide ring is equipped with the reative cell lower face of discharge hole periphery, is turned on the downside of guide ring Lever is equipped with baffle, and some second guide rods, each second guide rod end are distributed with the reative cell lower face of charging hole periphery The second limited block is connected with after holding through baffle.

In a kind of above-mentioned biomass carbonization preparation facilities, connection ring, connection ring are equipped with indoor rotating bar is cooled down Circumferentially distributed to have at least two connecting rods, each connecting rod end is respectively connected with the second harrow frame.

In a kind of above-mentioned biomass carbonization preparation facilities, discharge port is equipped with cooling chamber bottom, on the downside of discharge port Ground is equipped with spiral conveying mechanism, the conveying mechanism by delivery pipe, the feeder motor being located on the outside of delivery pipe and with it is defeated Power transmission machine connects and is located at the composition of the screw conveyor shaft in delivery pipe.

In a kind of above-mentioned biomass carbonization preparation facilities, conveying harrow frame on the upside of heating chamber in conveyer belt conveying side Conversion fractionation room, emission treatment room and delivery pipe are connected with to opposite turn in order；In conversion fractionation room and emission treatment room Lower end is equipped with combustion zone；The conversion fractionation room is turned on heating chamber, is equipped with conversion fractionation room opposite with emission treatment room Water conservancy diversion skirt, is equipped with diversion pipe, the diversion pipe is connected with Gas Pipe in conversion fractionation room upper end；The emission treatment room and conversion The opposite side wall in fractionation room is equipped with cellular deflector；Heat exchanging pipe, the heat exchanging pipe two are equipped with delivery pipe End is connected to cold air air inlet pipe and hot gas air outlet pipe, and the hot gas air outlet pipe is connected with heating bed.

The utility model with the above structure, heats biological material by heating bed, staged formula Hot wind gas outlet biological material can sufficiently be heated, while be capable of the length of shortening device, save space；Together When, coordinate conveying harrow frame by biological material in course of conveying, break up transport, increase biological material and hot-air Effective contact area, improves the efficiency of heating surface；Collecting mechanism is set in reative cell, and the convenient biological material to after burning carries out Collect and be pushed into cooling chamber, cool down indoor second harrow frame and biological material is stirred, accelerate cooling；In combustion process In, the biomass gas of generation enters in heating zone along delivery area, and biomass gas is converted by converting fractionation room, Fractionation, enters in reative cell along diversion pipe containing the higher gas of carbonomonoxide concentration and is recycled, the relatively low gas of combustion value Be rectified into it is cellular after aoxidized again, the gas after oxidation is discharged after the effect of heat-exchange tube, and the present apparatus has Efficient, low cost, conversion rate are fast, non smoke, without tar the advantages that.

Brief description of the drawings

The utility model is described in further detail for embodiment in below in conjunction with the accompanying drawings, but does not form to this reality With new any restrictions.

Fig. 1 is the structure diagram of the utility model；

Fig. 2 is the structure diagram of the utility model heating zone and delivery area；

Fig. 3 is the structure diagram of the utility model combustion zone and cooling chamber；

Fig. 4 is the partial enlargement structural representation at A in Fig. 1；

Fig. 5 is the overlooking the structure diagram of the utility model collecting mechanism；

Fig. 6 is the structure diagram of the utility model deflector.

In figure：Rack 1, conveyer belt 2, cooling chamber 3, heating chamber 4, heating bed 5, hot gas air inlet 5a, hot gas gas outlet 5b, conveying harrow frame 6, mounting bracket 6a, the first rake group 6b, the second rake group 6c, driving motor 6d, rotation axis 6e, gear 6f, driving-chain Bar 6g, rake teeth 6h, reative cell 7, discharge hole 7a, guide ring 7b, collecting mechanism 8, electric rotating machine 8a, lifting hydraulic cylinder 8b, rotation Bar 8c, worm gear 8d, stent 8e, worm screw 8f, the first harrow frame 8g, air intake duct 9, Gas Pipe 10, guiding mechanism 11, guide plate 11a, the first guide rod 11b, the first limited block 11c, baffle 12, the second guide rod 13, the second limited block 14, connection ring 15, company Extension bar 16, the second harrow frame 17, delivery pipe 18, feeder motor 19, screw conveyor shaft 20, conversion fractionation room 21, emission treatment room 22nd, delivery pipe 23, combustion zone 24, water conservancy diversion skirt 25, diversion pipe 26, deflector 27, heat exchanging pipe 28, cold air air inlet pipe 29, heat Gas air outlet pipe 30.

Embodiment

Refering to shown in Fig. 1 to Fig. 6, a kind of biomass carbonization preparation facilities of the utility model, including rack 1, in rack 1 Conveyer belt 2 is equipped with, heating zone, delivery area and combustion zone is sequentially equipped with along 2 conveying direction of conveyer belt, is equipped with the downside of combustion zone The cooling chamber 3 of connection is turned on combustion zone, the cooling chamber 3 is arranged in ground, and cooling chamber 3 is arranged on ground and can quickly carry out Cooling.

The heating zone includes heating chamber 4, the heating bed 5 being located at along its length in heating chamber 4 and is located at heating bed 5 Upside and with conveyer belt 2 it is matched conveying harrow frame 6；The heating chamber 4 is equipped with and 2 matched feed inlet of conveyer belt；Institute It is opposite with delivery area feed end to state 6 end of conveying harrow frame；Preferably, the conveying harrow frame 6 heats the installation of the upside of bed 5 by being located at Frame 6a, the first rake group 6b being located on mounting bracket 6a and the second rake group 6c and it is located at the outside of heating chamber 4 and drives first respectively Two driving motor 6d compositions that rake group 6b, the second rake group 6c are rotated, the first rake group 6b are inclined on mounting bracket 6a, Second rake group 6c is arranged horizontally at 5 upside of heating bed.

First, second rake the group 6b, 6c are located at two rotation axis 6e on mounting bracket 6a, along rotation axis 6e by interval Axially spaced-apart is distributed on each rotation axis 6e and corresponds the gear 6f of cooperation, around the biography being located between corresponding two gear 6f Dynamic chain 6g and the connecting plate being located on adjacent drive chain 6g and the rake teeth 6h compositions being located on connecting plate, first, the The two one of rotation axis 6e of rake group 6b, 6c and corresponding driving motor 6d connections.Using this structure, motor 6d bands are driven Dynamic chain, rake teeth rotate, and carry out rake pine and conveying to conveying the biomass material to come from conveyer belt 2, coordinate the heating of downside Biomass material after 5 pairs of bed is loose carries out heating, drying, removes excessive moisture.

Hot gas air inlet 5a is equipped with 5 lower face of heating bed, is distributed with the heating bed 5 on the downside of the first rake group 6b some Hot gas gas outlet 5b, each hot gas gas outlet 5b are cooperatively formed and the first matched stepped constructions of rake group 6b.Hot gas gas outlet 5b uses this stepped construction, convenient that biomass material is heated, and improves the efficiency of heating surface.

Meanwhile the combustion zone includes turning on the reative cell 7 connected and the collecting mechanism being located in reative cell 7 with delivery area 8,7 top of reative cell, which is respectively turned on, is connected with air intake duct 9 and Gas Pipe 10.

In order to facilitate the conveying of biological material, the discharge hole with the conducting connection of cooling chamber 3 is equipped with 7 inner bottom surface of reative cell 7a；The collecting mechanism 8 is by being located at electric rotating machine 8a, the lifting hydraulic cylinder being located on the downside of electric rotating machine 8a of the downside of cooling chamber 3 8b, with the rotating bar 8c of electric rotating machine 8a power output axis connections, be located at rotating bar 8c and extend to the end on the upside of discharge hole 7a On worm gear 8d, be located on the rotating bar 8c of worm gear 8d sides stent 8e, it is opposite be located at stent 8e on and with worm gear 8d cooperations Two worm screw 8f and the first harrow frame 8g compositions for being located at corresponding worm screw 8f free ends.The first harrow frame 8g by with screw rod 8g The connecting rod of free end connection, be located at the connecting plate of connecting rod lower end and be distributed in some rake teeths that gather materials of connecting plate lower face Composition.Using this structure, the lifting of whole stent is controlled by lifting hydraulic cylinder 8b, during burning, lifting hydraulic cylinder 8b hydraulic pressure Bar rise, the first harrow frame 8g be in higher position, when gathering materials, lifting hydraulic cylinder 8b hydraulic stems decline, the first harrow frame 8g decline and Biological material contacts, and electric rotating machine 8a driving worm gears rotate drive worm screw towards stent medial movement, and two the first harrow frame 8g will Biological material is harrowed into discharge hole 7a.

Be equipped with guiding mechanism 11 between rotating bar 8c and reative cell 7, the guiding mechanism 11 include being located at worm gear 8d with The guide plate 11a on rotating bar 8c between reative cell 7, be located at some first guide rod 11b of 7 inner bottom surface of reative cell and set The first limited block 11c on ends of each first guide rod 11b through guide plate 11a；Reative cell 7 in discharge hole 7a peripheries Lower face is equipped with guide ring 7b, and baffle 12, the reaction in discharge hole 7a peripheries are equipped with the rotating bar 8c on the downside of guide ring 7b 7 lower face of room is distributed with some second guide rods 13, and each second guide rod, 13 end passes through that to be connected with second after baffle 12 spacing Block 14.Using this structure, guide plate 11a, the first guide rod 11b, the first limited block 11c, which coordinate, plays good guiding work With preventing rotating bar sideslip.When lifting hydraulic cylinder 8b hydraulic stems rise, end in contact under baffle 12 and guide ring 7b, is played close Envelope acts on, and when lifting hydraulic cylinder 8b hydraulic stems decline, baffle 12 is separated with guide ring 7b lower ends, and biological material is from discharge hole Fallen at 7a in cooling chamber.

Preferably, connection ring 15 is equipped with the rotating bar 8c in cooling chamber 3, connection ring 15 is circumferentially distributed at least two A connecting rod 16, each 16 end of connecting rod are respectively connected with the second harrow frame 17.Second harrow frame 17 is by connecting plate and is distributed in connecting plate The stirring rake teeth composition of lower face, using this structure, electric rotating machine drives rotating bar 8c to rotate so as to drive the second harrow frame 17 Rotate, be stirred to cooling down indoor biological material, accelerate cooling.

Preferably, discharge port is equipped with 3 bottom of cooling chamber, spiral conveying mechanism is equipped with the ground on the downside of discharge port, The conveying mechanism is connected and is located at by delivery pipe 18, the feeder motor 19 being located on the outside of delivery pipe 18 and with feeder motor 19 Screw conveyor shaft 20 in delivery pipe 18 forms.The mode of helical feed can convey stabilization.In the present embodiment, in delivery area Structure for conveying is also that therefore not to repeat here by the way of spiral shell fortune.

Preferably, turn in order opposite with 2 conveying direction of conveyer belt is connected with the heating chamber 4 of 6 upside of conveying harrow frame Conversion fractionation room 21, emission treatment room 22 and delivery pipe 23；Combustion is equipped with conversion fractionation room 21 and 22 lower end of emission treatment room Burn band 24；The conversion fractionation room 21 is turned on heating chamber 4, and opposite with emission treatment room 22 lead is equipped with conversion fractionation room 21 Skirt 25 is flowed, is equipped with diversion pipe 26 in conversion fractionation 21 upper end of room, the diversion pipe 26 is connected with Gas Pipe 10；The emission treatment The side wall opposite with conversion fractionation room 21 of room 22 is equipped with cellular deflector 27；Heat exchanging pipe is equipped with delivery pipe 23 28,28 both ends of heat exchanging pipe are connected to cold air air inlet pipe 29 and hot gas air outlet pipe 30, the hot gas air outlet pipe 30 It is connected with heating bed 5.Using this structure, in the temperature more than charcoal burning point, the air inlet of air is controlled by air intake duct 9 Amount, makes to keep semianaerobic condition in reative cell, the carbon component in biomass gas is oxidized to carbon monoxide, by proportion freely divides From, fractionate out the higher biomass gas of carbon monoxide content, at diversion pipe enter reative cell in recycled.Proportion The relatively low gas of lower part combustion value is freely separating under the action of combustion zone 24, deflector 27, is rectified into cellular air-flow laggard one Step is aoxidized, and is obtained the higher gas of temperature and is entered in delivery pipe 23, under the action of heat-exchange tube 28, delivery pipe is final Discharge is carbon dioxide, water, has the function that energy-saving and emission-reduction.

During work, biomass material is delivered on heating bed by conveyer belt, and biomass material is carried out by conveying harrow frame Rake pine, transport, in course of conveying, heating bed carries out heating, drying processing to biomass material, and it is unnecessary to remove biomass material Moisture, then biomass material be delivered to by delivery area in reative cell, biomass material is carried out at high temperature in reative cell Reason obtains biological material, and biological material enters in cooling chamber under the action of collecting mechanism to be cooled down, life after cooling Material is delivered to exterior progress packing processes by the mode of helical feed；The biomass gas produced in reative cell is via defeated It is fractionated after sending area into conversion fractionation interior, being rejoined containing CO gas in reative cell for being fractionated carries out Recycle, the relatively low gas of combustion value continues to aoxidize in emission treatment room after fractionation, is finally given off from delivery pipe Carbon dioxide and water.

Embodiment provided above is the better embodiment of the utility model, is only used for convenient explanation the utility model, and The non-limitation made to the utility model in any form, any those of ordinary skill in the art, if not departing from In the range of the utility model carries technical characteristic, locally change or repair using made by the utility model disclosed technology content The equivalent embodiment of decorations, and without departing from the technical characteristics of the utility model content, still fall within the utility model technical characteristic In the range of.

Claims

1. a kind of biomass carbonization preparation facilities, including rack (1), it is characterised in that conveyer belt (2) is equipped with rack (1), Heating zone, delivery area and combustion zone are sequentially equipped with along conveyer belt (2) conveying direction, is equipped with the downside of combustion zone and is turned on combustion zone The cooling chamber (3) of connection；The heating zone includes heating chamber (4), the heating bed (5) being located at along its length in heating chamber (4) And be located on the upside of heating bed (5) and with the matched conveying harrow frame (6) of conveyer belt (2)；The heating chamber (4) be equipped with it is defeated Send band (2) matched feed inlet；Conveying harrow frame (6) end is opposite with delivery area feed end；The combustion zone include with The reative cell (7) of delivery area conducting connection and the collecting mechanism (8) being located in reative cell (7), reative cell (7) the top difference Conducting is connected with air intake duct (9) and Gas Pipe (10).

A kind of 2. biomass carbonization preparation facilities according to claim 1, it is characterised in that it is described conveying harrow frame (6) by Be located at the mounting bracket (6a) on the upside of heating bed (5), the first rake group (6b) being located on mounting bracket (6a) and the second rake group (6c) with And it is located on the outside of heating chamber (4) and drives the first rake group (6b) respectively, two driving motors (6d) that the second rake group (6c) rotates Composition, the first rake group (6b) are inclined on mounting bracket (6a), and the second rake group (6c) is arranged horizontally at heating On the upside of bed (5).

A kind of 3. biomass carbonization preparation facilities according to claim 2, it is characterised in that the first, second rake group Two rotation axis (6e) that (6b, 6c) is located on mounting bracket (6a) by interval, be distributed in respectively along rotation axis (6e) axially spaced-apart In rotation axis (6e) and correspond the gear (6f) of cooperation, around the driving chain (6g) being located between corresponding two gears (6f) And the connecting plate being located on adjacent drive chain (6g) and rake teeth (6h) composition being located on connecting plate, first, second rake Group (6b, 6c) one of rotation axis (6e) is connected with corresponding driving motor (6d).

4. a kind of biomass carbonization preparation facilities according to claim 2, it is characterised in that in heating bed (5) lower face Equipped with hot gas air inlet (5a), some hot gas gas outlets (5b) are distributed with the heating bed (5) on the downside of the first rake group (6b), respectively Hot gas gas outlet (5b) cooperatively forms and first rake group (6b) matched stepped construction.

5. a kind of biomass carbonization preparation facilities according to claim 1, it is characterised in that the cooling chamber (3) is set In ground, the discharge hole (7a) with cooling chamber (3) conducting connection is equipped with reative cell (7) inner bottom surface；The collecting mechanism (8) By be located at electric rotating machine (8a) on the downside of cooling chamber (3), be located on the downside of electric rotating machine (8a) lifting hydraulic cylinder (8b), with rotation The rotating bar (8c) of motor (8a) power output axis connection, be located at rotating bar (8c) and extend on the end on the upside of discharge hole (7a) Worm gear (8d), be located in worm gear (8d) side rotating bar (8c) stent (8e), opposite be located on stent (8e) and and worm gear Two worm screws (8f) of (8d) cooperation and the first harrow frame (8g) composition for being located at corresponding worm screw (8f) free end；In rotating bar Guiding mechanism (11) is equipped between (8c) and reative cell (7).

A kind of 6. biomass carbonization preparation facilities according to claim 5, it is characterised in that guiding mechanism (11) bag Include the guide plate (11a) in the rotating bar (8c) being located between worm gear (8d) and reative cell (7), be located at reative cell (7) inner bottom surface Some first guide rods (11b) and be located at each first guide rod (11b) through guide plate (11a) end on first limit Position block (11c)；Guide ring (7b) is equipped with reative cell (7) lower face of discharge hole (7a) periphery, on the downside of guide ring (7b) Rotating bar (8c) is equipped with baffle (12), and some second are distributed with reative cell (7) lower face of discharge hole (7a) periphery and is oriented to Bar (13), each second guide rod (13) end are connected with the second limited block (14) after passing through baffle (12).

7. a kind of biomass carbonization preparation facilities according to claim 5, it is characterised in that turn in cooling chamber (3) Lever (8c) is equipped with connection ring (15), and connection ring (15) is circumferentially distributed at least two connecting rods (16), each connecting rod (16) end is respectively connected with the second harrow frame (17).

8. a kind of biomass carbonization preparation facilities according to claim 1, it is characterised in that set in cooling chamber (3) bottom Have discharge port, be equipped with spiral conveying mechanism on the ground on the downside of discharge port, the conveying mechanism by delivery pipe (18), be located at it is defeated Send the feeder motor (19) on the outside of pipe (18) and the helical feed for being connected and being located in delivery pipe (18) with feeder motor (19) Axis (20) forms.

9. a kind of biomass carbonization preparation facilities according to claim 1, it is characterised in that on the upside of conveying harrow frame (6) Heating chamber (4) in turn in order opposite with conveyer belt (2) conveying direction be connected with conversion be fractionated room (21), emission treatment room (22) and delivery pipe (23)；Combustion zone (24) is equipped with conversion fractionation room (21) and emission treatment room (22) lower end；Described turn Change fractionation room (21) to turn on heating chamber (4), the water conservancy diversion skirt opposite with emission treatment room (22) is equipped with conversion fractionation room (21) (25), diversion pipe (26) is equipped with conversion fractionation room (21) upper end, the diversion pipe (26) is connected with Gas Pipe (10)；The row Put process chamber (22) side wall opposite with conversion fractionation room (21) and be equipped with cellular deflector (27)；Set in delivery pipe (23) There is heat exchanging pipe (28), heat exchanging pipe (28) both ends are connected to cold air air inlet pipe (29) and hot gas air outlet pipe (30), the hot gas air outlet pipe (30) is connected with heating bed (5).