CN202024313U - Biomass fuel direct combustion-type intensified combustion device - Google Patents

Biomass fuel direct combustion-type intensified combustion device Download PDF

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Publication number
CN202024313U
CN202024313U CN2011201112896U CN201120111289U CN202024313U CN 202024313 U CN202024313 U CN 202024313U CN 2011201112896 U CN2011201112896 U CN 2011201112896U CN 201120111289 U CN201120111289 U CN 201120111289U CN 202024313 U CN202024313 U CN 202024313U
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CN
China
Prior art keywords
combustion chamber
dispenser
feed
biomass fuel
combustion
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Expired - Fee Related
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CN2011201112896U
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Chinese (zh)
Inventor
陈爱容
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MILES INTERNATIONAL HOLDING GROUP CO Ltd
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MILES INTERNATIONAL HOLDING GROUP CO Ltd
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Priority to CN2011201112896U priority Critical patent/CN202024313U/en
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Publication of CN202024313U publication Critical patent/CN202024313U/en
Anticipated expiration legal-status Critical
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model discloses a biomass fuel direct combustion-type intensified combustion device, which comprises a cannular combustion chamber and a cannular feeder, wherein the cannular combustion chamber is arranged in a boiler body; the cannular feeder is arranged outside the boiler body and is located at the feed end of the combustion device; the feeder and the combustion chamber are respectively of an interlayer structure formed by an inner wall and an outer wall; the outer wall of the discharge end of the feeder is connected with the inner wall of the feed end of the combustion chamber through a horn mouth; the outer wall of the feed end of the feeder is provided with a feed pipe which is tangential with the outer wall of the feeder in a conclinal way; the interlayer position of the discharge end of the feeder is provided with a discharge hole; the outer wall of the feed end of the combustion chamber is provided with a secondary air inlet communicated into the interlayer of the combustion chamber; the outer wall of the fire outlet end of the combustion chamber is symmetrically provided with two secondary air outlets; the two secondary air outlets are respectively communicated with symmetrical air return pipes; the air outlets of the air return pipes are tangential with the inner side of the refractory matter layer of the feed end of the combustion chamber in the conclinal way; and a conical throttle ring is arranged in the fire outlet end of the combustion chamber. The biomass fuel direct combustion-type intensified combustion device disclosed by the utility model is capable of effectively promoting the complete combustion of biomass fuel.

Description

The direct-fired intensified burning apparatus of biomass fuel
Technical field
The utility model relates to a kind of combustion apparatus of bio-fuel, specifically a kind of direct-fired intensified burning apparatus of biomass fuel.
Background technology
China is faced with serious energy shortage and environmental pollution problems at present, conventional energy resources such as coal, oil, natural gas can be exploited totally at last, also cause a series of problem of environmental pollution simultaneously, country's non-renewable resources such as progressively replacing coal, oil, natural gas that tap a new source of energy energetically.In numerous new forms of energy, the renewable biomass energy has great potentiality to be exploited.So-called biomass energy is with the environmental protection new forms of energy of stalks such as rice husk, cornstalk, peanut shell through the biomass fuel of processing generation, aboundresources not only, characteristic such as also have the efficiency of combustion height, pollutant emission is few, price is low, combustible component high (volatile matter+fixed carbon) ash amount is few.In the actual use of biomass fuel, need the advanced burner of exploitation, promote the completing combustion of biomass fuel, for heat transmission equipments such as boiler provide relatively inexpensive thermal source.
Chinese patent 200920091185.6 has been introduced a kind of external biomass combustion machine, it is arranged in the outside of heat transmission equipments such as boiler, comprise cannular combustion chamber and the crater that docks with boiler, combustor inside is refractory masses, the outside of combustion chamber and crater is equipped with interlayer, these two interlayers are connected with blowing device by airduct respectively, and the interlayer of crater is communicated to inside, combustion chamber by the backwind tube of the some of the sensing feed arrangement that tilts; The interlayer of combustion chamber is by having the tornadotron of the some of certain angle to be communicated to inside, combustion chamber with the combustion chamber diameter; Described feed arrangement contains the center ajutage, arranged outside at the center ajutage has the interlayer sleeve pipe, this interlayer sleeve pipe is the feeding interlayer, be connected with feeder equipment by the feeding airduct, mend the wind interlayer in this feeding interlayer arranged outside, this benefit wind interlayer is connected with blowing device by secondary air channel, and described center ajutage, feeding interlayer and benefit wind interlayer all are communicated to inside, combustion chamber; Be provided with in the outside of crater interlayer and protect fiery interlayer, protect fiery interlayer and be connected with blowing device, be uniformly distributed with deflector along the circumference between two circular side wall of this interlayer by airduct.Because combustor of the present utility model is arranged in the boiler body outside, the heat that burning produces can cause certain loss relatively, and the idle relatively waste of the devices such as conveyer chain that cause boiler internal indirectly, and, though it is provided with secondary air channel and center ajutage, but it is positioned at the center of combustion chamber, cause distinguished and admirable disorder easily, the effect of the promotion burning of being played is not good relatively yet, moreover, crater docks with the direct of boiler, does not take the means of throttling, can make a part also be brought into heat-exchanger rig with flame without the biomass fuel of completing combustion.
The utility model content
The utility model technical issues that need to address provide the direct-fired intensifying device of a kind of effective promotion biomass fuel completing combustion.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is:
The direct-fired intensified burning apparatus of biomass fuel, comprise that the inboard of the tubular that is arranged in boiler body inside is provided with the combustion chamber of refractory masses, is arranged in the dispenser of the tubular that is positioned at the combustion chamber feed end of boiler body outside, the sandwich that is made of inner and outer wall all is arranged in dispenser and combustion chamber, and the outer wall of dispenser discharge end is connected with the inwall of combustion chamber feed end by a horn mouth; Be provided with on the outer wall of dispenser feed end and be connected with blowing device, with the outer wall of the dispenser tangent feed pipe that forward tilts, the interlayer place of dispenser discharge end is provided with discharging opening, the discharging opening place is provided with some vane sheets that forward rotate around the dispenser inwall, the rotation direction that the vane sheet forms is consistent with the rotation direction of the whirlwind that feed pipe forms in dispenser, the angle of inclination of the relative dispenser axis with feed pipe in angle of inclination of the relative dispenser axis of vane sheet is corresponding, and the diffuser plate parallel with horn mouth to the expansion of combustion chamber direction is set on the inwall circumference of discharging opening vane sheet end; The secondary wind that is connected with secondary blast equipment, be communicated in the interlayer of combustion chamber is set on the outer wall of combustion chamber feed end to enter the mouth, the combustion chamber goes out to be symmetrical arranged on the outer wall of fire end two secondary wind outlets, the outlet of secondary wind is communicated with the backwind tube of symmetry respectively, the air outlet of backwind tube is communicated in the combustion chamber and the refractory masses inboard of combustion chamber feed end forward tilts tangent, backwind tube is consistent in the whirlwind rotation direction that dispenser forms with feed pipe at the whirlwind of the formation of inside, combustion chamber, and the inside that the combustion chamber goes out fire end is provided with the taper restrictor ring.
Further improvement of the utility model is: described combustion chamber in secondary wind enters the mouth the interlayer of secondary wind outlet, some deflectors of arranging along the shapes in the shape of a spiral of inwall rotation are set.
Further improvement of the utility model is: the angle of inclination of the relative dispenser axis of the air outlet of described feed pipe is 60 °~80 °, and the angle of inclination of the air outlet relative combustion chamber axis of backwind tube is 65 °~75 °.
Further improvement of the utility model is: described bell-mouthed angle is 100 °~130 °.
Further improvement of the utility model is: the backwind tube junction of the discharging opening of described dispenser and combustion chamber feed end is at a distance of 0.8m.
Further improvement of the utility model is that described combustion chamber becomes downward 10 ° being obliquely installed from feed end to going out fire end.
Further improvement of the utility model is: set out cinder notch on the chamber wall of described taper restrictor ring below, the slag notch setting extends to the residue outlet that is embedded in the mucking machine in the water.
Further improvement of the utility model is: the outside of described outer wall of combustion chamber and backwind tube all is provided with adiabator layer.
Further improvement of the utility model is: described dispenser front end is provided with peephole.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
Horizontal combustion chamber of the present utility model tube structure is ingenious; by the sandwich of band inwall, outer wall is set; the air that heat that the one side combustion chamber conducts out and secondary wind are blown into carries out heat exchange; it is air-cooled that the combustion chamber cylindrical shell has been obtained; thereby the support steel body that the protection inner and outer wall constitutes is not because of the overheated rigidity that reduces; cold wind is heated to more than 100 ℃ on the other hand; this hot blast forward tilts tangentially to blast the combustion chamber from the refractory masses inboard of backwind tube and combustion chamber feed end again, has not only reduced heat loss but also increased combustion efficiency.Be provided with in the interlayer of combustion chamber from the secondary wind combustion chamber that enters the mouth and go out the deflector that fire end backwind tube junction is arranged in the shape of a spiral, improved the exchange heat effect in cold wind and the combustion chamber, the outside at cylinder body outer wall and backwind tube has all increased adiabator layer, it is minimum that the heat loss of burner has been dropped to, and improved energy-conservation effect.The utility model is provided with primary air fan and is connected by closed conduit with dispenser, can form controlled blast and air quantity under the control of damper, makes the biomass fuel supply that continuously obtains just right flow in the combustion chamber; Fuel is the outer wall of dispenser feed pipe and dispenser tangent the injecting of forward tilting, form the high-speed screw combustion flow of 30m/s~60m/s, make that air and fuel particle are full and uniform to be mixed, at the dispenser discharging opening some vane sheets that forward rotate around the dispenser inwall are set, the rotation direction that the vane sheet forms is consistent with the rotation direction of the whirlwind that feed pipe forms in dispenser, the angle of inclination of the relative dispenser axis of feed pipe is 60 °~80 °, the angle of inclination of the relative dispenser axis with feed pipe in angle of inclination of the relative dispenser axis of vane sheet is corresponding, and the speed of spiral combustion stream is strengthened.The diffuser plate parallel with horn mouth to the expansion of combustion chamber direction is set on the inwall circumference of discharging opening vane sheet end, raw material is sprayed on the diffuser plate by the vane sheet, further impel raw material all around to spraying.The utility model dispenser is connected by 100 °~130 ° horn mouths with the combustion chamber, and spiral combustion flows under centrifugal force and speed action of inertia, and combustion flow is along horn mouth direction diffusion, make fuel particle in eddy flow high-strength divide diffusing; The air outlet of dispenser discharging opening and combustion chamber secondary wind backwind tube is at a distance of 0.8m, and this makes and forms the high-speed screw combustion flow at dispenser and obtain relay and reinforcement on the speed, and biomass fuel is with the helix speed overheavy firing more than the 60m/s.Under centrifugal action, fuel forms " cyclone " effect by the granular size weight in the horizontal combustion chamber of circle, and bulky grain is thrown to the combustion chamber inwall, and the center forms " typhoon eye ".In high-intensity combustion, the small amounts of mineral flying dust that the biomass fuel afterburnt stays, most of fuel is by high temperature melting, on the inwall of combustion chamber, form the liquid slag film, and unburnt fuel bulky grain is adhered to by the liquid slag film, relatively slow becomes spiral motion along the combustion chamber inwall, forms very big relative velocity with the high temperature and high speed air, makes full combustion of fuel.Combustion chamber of the present utility model goes out fire end the taper restrictor ring, the combustion chamber becomes 10 ° of downward inclinations angle from feed end to going out fire end, the lowest part of slag notch below the taper restrictor ring, the slag notch setting extends to the residue outlet that is embedded in the mucking machine in the water, eddy flow is necessary reverse movement at taper restrictor ring place, prolonged the burning time of fuel effectively, also forced the liquid slag film to converge into liquid slag simultaneously and flow to slag notch.Liquid slag under the gravity effect vertical current to mucking machine.Mucking machine is embedded in the water, and the residue outlet that slag notch prolongs is lived in water seal, blocks the path of combustion chamber and atmosphere, makes the combustion chamber keep stable slight positive pressure state.The composition of liquid slag in the biomass fuel flying dust is indefinite form silica and sylvite, and they all are the eutectic materials, and these liquid slag are fallen in the water, and moment becomes the blow body, and it is broken to be quenched, with the eliminating of slagging tap.Other infusibility flying dusts all are crystalline state inorganic non-metallic materials, can adhesiving metal heat-exchange system surfaces, hold back by simple and easy screen collector.The utility model is arranged on boiler internal with the combustion chamber, is convenient to construction, saves material, and effectively the heat with burning is discharged into boiler body.To sum up, use intensifying device of the present utility model, can effectively promote the completing combustion of biomass fuel.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is that the A-A of Fig. 1 is to view.
Wherein, 1, dispenser, 2, the combustion chamber, 3, horn mouth, 4, feed pipe, 5, discharging opening, 6, backwind tube, 7, the taper restrictor ring, 8, diffuser plate, 9, secondary wind inlet, 10, slag notch, 11, peephole, 12, refractory masses, 13, deflector, 14, adiabator layer.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further details:
The direct-fired intensified burning apparatus of biomass fuel as shown in Figure 1, comprise tubular dispenser 1, cannular combustion chamber 2, combustion chamber 2 is arranged in boiler body inside, dispenser 1 is arranged in the boiler body outside as the feed arrangement of combustion chamber 2, dispenser 1 and combustion chamber 2 all are the sandwich that is made of inner and outer wall, 2 inwalls inboard, combustion chamber is a refractory masses 12, combustion chamber 2 outer exterior wall are the adiabator layer 14 of thickness 100mm, the outer wall of dispenser 1 discharge end is connected with the inwall of combustion chamber 2 feed ends by horn mouth 3, the angle of horn mouth 3 is 100 °~130 °, preferred 110 °.The inwall and the outer wall of dispenser 1 front end are closed into front end face, peephole 11 is set on the front end face, on the outer wall of dispenser 1 feed end feed pipe 4 is set, one end of feed pipe 4 is connected with blowing device, the outer wall of the other end and dispenser 1 is tangent, and feed pipe 4 is that the discharging direction along dispenser becomes certain angle of inclination and dispenser outer wall tangent with the feeder axis, feed pipe 4 is communicated to the interlayer of dispenser 1, because feed pipe and dispenser are tangent, fuel forms the whirlwind of spiral in dispenser, again because feed pipe is to become certain angle of inclination with the feeder axis along dispenser discharging direction, fuel is after tangentially injecting dispenser, also obtain a speed to the motion of discharging direction, to impel fuel to advance to discharge end in a spiral manner, the angle of inclination of the relative dispenser axis of the air outlet of this feed pipe is 60 °~80 °, preferred 70 °.With reference to the accompanying drawings as can be seen in the present embodiment fuel in dispenser, form the whirlwind of dextrorotation.Dispenser 1 interlayer and horn mouth 3 junctions are provided with discharging opening 5, discharging opening 5 is provided with some vane sheets that forward rotate around the dispenser inwall, the rotation direction that some vane sheets form is consistent with the rotation direction of the whirlwind that feed pipe forms in dispenser, therefore the vane sheet also forms the whirlwind of dextrorotation, the angle of inclination of relative dispenser 1 axis of vane sheet is close or equal with the angle of inclination of feed pipe 4 relative dispenser 1 axis, and spiral fuel stream is further strengthened.On the inwall circumference of discharging opening vane sheet end diffuser plate 8 is set, diffuser plate is bell mouth shape to the expansion of combustion chamber 2 directions, and the angle of diffuser plate is identical with horn mouth, and raw material is sprayed on the diffuser plate by the vane sheet, further impels raw material to spraying all around.Secondary wind inlet 9 is set on the outer wall of combustion chamber 2 feed ends, and secondary wind 9 one ends that enter the mouth are connected with secondary blast equipment, and the other end is communicated to the interlayer of combustion chamber 2.The combustion chamber goes out to be symmetrical arranged on the outer wall of fire end two secondary wind outlets, the outlet of secondary wind is communicated with the backwind tube 6 of symmetry respectively, refractory masses 12 inboards of the air outlet of backwind tube and combustion chamber 2 feed ends forward tilt tangent, the same with being provided with of feed pipe 4,2 inside also are the spiral whirlwind that forms towards the end motion that fires to backwind tube 6 in the combustion chamber, the whirlwind of backwind tube 6 formation of 2 inside in the combustion chamber is consistent in the whirlwind rotation direction that dispenser 1 forms with feed pipe 4, specific to the whirlwind of two backwind tube formation dextrorotation in the present embodiment, the angle of inclination of air outlet relative combustion chamber 2 axis of backwind tube 6 is 65 °~75 °.The junction of backwind tube 62 feed ends in the combustion chamber and discharging opening 5 distances are 0.8m.The secondary wind that secondary blast equipment is sent into enters from the secondary wind inlet of combustion chamber feed end, after the cylindrical shell preheating goes out fire end from the combustion chamber secondary wind exports out, tangentially blast inside, combustion chamber, further strengthened the speed of combustion chamber inside spin fuel stream by backwind tube.Some deflectors of arranging along the shapes in the shape of a spiral of inwall rotation 13 are set, so that prolong the moving line of secondary wind in interlayer in the interlayer that exports from secondary wind inlet 9 to secondary wind of combustion chamber 2.The adiabator layer 14 of the arranged outside thickness 100mm of backwind tube 6.The rear end of 2 inside, combustion chamber is provided with taper restrictor ring 7, and combustion chamber 2 becomes downward 10 ° being obliquely installed from feed end to going out fire end, sets out cinder notch 10 on the chamber wall of taper restrictor ring 7 belows, and the slag notch setting extends to the residue outlet that is embedded in the mucking machine in the water.The utility model can with combustion coal chain boiler below 20 tons, from the front or side butt joint, from every preparation ready after, boiler shutdown 7 days can be finished the butt joint engineering.

Claims (9)

1. the direct-fired intensified burning apparatus of biomass fuel, it is characterized in that: comprise that the inboard of the tubular that is arranged in boiler body inside is provided with the combustion chamber of refractory masses (12) (2), is arranged in the dispenser (1) of the tubular that is positioned at combustion chamber (2) feed end of boiler body outside, the sandwich that is made of inner and outer wall all is arranged in dispenser (1) and combustion chamber (2), and the outer wall of dispenser (1) discharge end is connected with the inwall of combustion chamber (2) feed end by a horn mouth (3); Be provided with on the outer wall of dispenser (1) feed end and be connected with blowing device, with the outer wall of dispenser (1) the tangent feed pipe (4) that forward tilts, the interlayer place of dispenser discharge end is provided with discharging opening (5), discharging opening (5) locates to be provided with some vane sheets that forward rotate around the dispenser inwall, the rotation direction that the vane sheet forms is consistent with the rotation direction of the whirlwind that feed pipe (4) forms in dispenser, the angle of inclination of the relative dispenser of vane sheet (1) axis is corresponding with the angle of inclination of the relative dispenser of feed pipe (4) (1) axis, and the diffuser plate (8) parallel with horn mouth (3) to the expansion of combustion chamber direction is set on the inwall circumference of discharging opening (5) vane sheet end; Setting is connected with secondary blast equipment on the outer wall of combustion chamber (2) feed end, be communicated to the secondary wind inlet (9) in the interlayer of combustion chamber (2), combustion chamber (2) goes out to be symmetrical arranged on the outer wall of fire end two secondary wind outlets, the outlet of secondary wind is communicated with the backwind tube (6) of the symmetry that is arranged on the outside, combustion chamber respectively, the air outlet of backwind tube (6) is communicated in the combustion chamber (2) and refractory masses (12) inboard of combustion chamber feed end forward tilts tangent, backwind tube (6) is consistent in the whirlwind rotation direction that dispenser (1) forms with feed pipe (4) at the whirlwind of the formation of inside, combustion chamber, and the inside that combustion chamber (2) go out fire end is provided with taper restrictor ring (7).
2. the direct-fired intensified burning apparatus of biomass fuel according to claim 1 is characterized in that: some deflectors of arranging along the shape in the shape of a spiral of inwall rotation (13) are set in the interlayer of the outlet from secondary wind inlet (9) to secondary wind of described combustion chamber (2).
3. the direct-fired intensified burning apparatus of biomass fuel according to claim 2, it is characterized in that: the angle of inclination of the relative dispenser axis of air outlet of described feed pipe (4) is 60 °~80 °, and the angle of inclination of the air outlet relative combustion chamber axis of backwind tube is 65 °~75 °.
4. according to the direct-fired intensified burning apparatus of each described biomass fuel of claim 1~3, it is characterized in that: the angle of described horn mouth (3) is 100 °~130 °.
5. the direct-fired intensified burning apparatus of biomass fuel according to claim 4 is characterized in that: backwind tube (6) junction of discharging opening of described dispenser (5) and combustion chamber (2) feed end is at a distance of 0.8m.
6. the direct-fired intensified burning apparatus of biomass fuel according to claim 5 is characterized in that: described combustion chamber (2) become downward 10 ° being obliquely installed from feed end to going out fire end.
7. according to the direct-fired intensified burning apparatus of each described biomass fuel of claim 1~3, it is characterized in that: set out cinder notch (10) on the chamber wall of described taper restrictor ring (7) below.
8. according to the direct-fired intensified burning apparatus of each described biomass fuel of claim 1~3, it is characterized in that: the outside of described combustion chamber (2) outer wall and backwind tube (6) all is provided with adiabator layer (14).
9. according to the direct-fired intensified burning apparatus of each described biomass fuel of claim 1~3, it is characterized in that: described dispenser (1) front end is provided with peephole (11).
CN2011201112896U 2011-04-15 2011-04-15 Biomass fuel direct combustion-type intensified combustion device Expired - Fee Related CN202024313U (en)

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CN2011201112896U CN202024313U (en) 2011-04-15 2011-04-15 Biomass fuel direct combustion-type intensified combustion device

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Application Number Priority Date Filing Date Title
CN2011201112896U CN202024313U (en) 2011-04-15 2011-04-15 Biomass fuel direct combustion-type intensified combustion device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090364A (en) * 2013-02-08 2013-05-08 胡光 Horizontal type cyclone combustion biomass burning machine
CN105003908A (en) * 2014-12-12 2015-10-28 杭州千岛湖丰凯实业有限公司 Biomass particle fuel burning machine
CN105076513A (en) * 2014-12-12 2015-11-25 杭州千岛湖丰凯实业有限公司 Granular fuel-adopted tea strip tidying machine
CN105222128A (en) * 2014-06-16 2016-01-06 长沙创良热能科技有限公司 A kind of living beings wooden dust burner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090364A (en) * 2013-02-08 2013-05-08 胡光 Horizontal type cyclone combustion biomass burning machine
CN103090364B (en) * 2013-02-08 2015-09-30 胡光 Horizontal cyclone biomass burning combustor
CN105222128A (en) * 2014-06-16 2016-01-06 长沙创良热能科技有限公司 A kind of living beings wooden dust burner
CN105222128B (en) * 2014-06-16 2017-11-14 长沙创良热能科技有限公司 A kind of biomass wooden dust burner
CN105003908A (en) * 2014-12-12 2015-10-28 杭州千岛湖丰凯实业有限公司 Biomass particle fuel burning machine
CN105076513A (en) * 2014-12-12 2015-11-25 杭州千岛湖丰凯实业有限公司 Granular fuel-adopted tea strip tidying machine
CN105003908B (en) * 2014-12-12 2017-04-19 杭州千岛湖丰凯实业有限公司 Biomass particle fuel burning machine
CN105076513B (en) * 2014-12-12 2018-05-18 杭州千岛湖丰凯实业有限公司 Granular fuel carding machine

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