CN101963362A - Segmented coal feeding device for forward fire coal chain boiler - Google Patents
Segmented coal feeding device for forward fire coal chain boiler Download PDFInfo
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Abstract
The invention relates to a segmented coal feeding device for a forward fire coal chain boiler. The device comprises a coal feeding hopper, a coal roller, a coal conveying chain grate and a plurality of coal gate regulation mechanisms, wherein the coal feeding hopper is arranged on a boiler body; the coal roller is arranged in the middle of the coal feeding hopper; the coal conveying chain grate stretches into the inner cavity of the boiler body; and the plurality of coal gate regulation mechanisms are arranged above the coal feeding hopper and the coal roller along a fixed pallet in a segmented mode. The segmented coal feeding device has the advantages that: coal is fed in the segmented mode in spite of the change of transverse air volume and air pressure in a hearth (including unorganized and leaked air), so that the change can be adapted by regulating the thickness of a coal bed; and the coal feeding bed is thicker in a place with large air volume and air pressure, while the coal feeding bed is thinner in a place with small air volume and air pressure, so that the fire cutoff of a burning stopping point is ordered, burning time is increased, the cold air volume on the rear part of the hearth is reduced, the temperature of the hearth is improved and the coal bed is more thoroughly burned. A large amount of practice proves that the temperature of the hearth can be improved by 50 to 150 DEG C commonly; and if the tail part of the boiler is not provided with a water curtain dust removal device, the cold air volume can be reduced by 10 to 30 percent.
Description
Technical field:
The present invention relates to a kind of combustion coal chain boiler that just changeing, more specifically to a kind of coal feeder that is used for just changeing the segmentation of combustion coal chain boiler.
Background technology:
In the prior art, just change combustion coal chain boiler and in Industrial Boiler, occupying quite great proportion, the coal feeder of this boiler is provided with feeding-coal bucket at boiler forehearth exterior wall usually, the feeding-coal bucket bottom opening communicates with the traveling-grate stoker starting point, enters burner hearth by the gap under the coal flashboard under traveling-grate stoker drives.Survey factually that tight and air door distortion causes the cross air dispatching inhomogeneities to have a strong impact on chain furnace efficient because of the side seal of fire grate, 2007 the 22nd the 03rd phases of volume of domestic unified edition number CN23-1176/TK " thermal power engineering " are called in " research of chain-grate boiler cross air dispatching inhomogeneities " literary composition has disclosed this problem.At this problem, a 20t/h chain furnace air feed system has been carried out the real stove cold test of 7 operating modes, it is the main cause that causes the air distribution inequality that the tight and air door of the side seal that the result shows fire grate is out of shape. with the measured data boundary condition, employing k-ε turbulence model flows to single air compartment internal gas and carries out numerical simulation, finds that the pressure drop of expansion stream, dynamic pressure are converted into static pressure and the interior vortex disturbance of air compartment is the immanent cause that causes the cross air dispatching inequality.The uniformity that how to improve cross air dispatching effectively is the problem that the inventor studies.
Summary of the invention:
The objective of the invention is to provide a kind of amount of controlling on the defeated coal chain sliver transvers section that fire coal falls into the body of heater inner chamber of falling at the prior art weak point, make whole coal seam cloth wind uniform, it is inadequate to avoid occurring the burning of burner, air port and scarce wind, improves the coal feeder of segmentation that is used for just changeing combustion coal chain boiler of coal seam integral combustion situation.
The objective of the invention is to realize: a kind of coal feeder that is used for just changeing the segmentation of combustion coal chain boiler by following measure, comprise the feeding-coal bucket of being located on the boiler body, be installed in the coal cylinder at feeding-coal bucket middle part, stretch into the defeated coal traveling-grate stoker of body of heater inner chamber, its special character is, be installed in the coal flashboard governor motion that feeding-coal bucket coal cylinder top is arranged along the segmentation of fixed bin plate in addition, described coal flashboard governor motion is made up of the coal flashboard governor motion that is positioned at feeding-coal bucket fixed bin plate both sides and some coal flashboard governor motions that is positioned at the coal bunker middle part, the described coal flashboard governor motion of feeding-coal bucket fixed bin plate both sides that is positioned at is by screw mandrel and rolling bearing, the coal flashboard, screw and the guide groove that is fixed on the fixed bin plate are formed, described screw mandrel is fixed on the fixed bin plate by rolling bearing, be installed on the coal flashboard with the screw of screw mandrel engagement, the coal flashboard inserts in the guide groove of fixed bin plate; The described coal flashboard governor motion at coal bunker middle part that is positioned at is by upper and lower power transmission shaft, be installed in the upper and lower sprocket wheel on the upper and lower power transmission shaft, chain, coal flashboard, the guide groove that is fixed on the fixed bin plate are formed, upper and lower power transmission shaft is fixed on the feeding-coal bucket two side, the overhanging cantilever end of upper and lower power transmission shaft is equipped with the worm and gear transmission case, and the coal flashboard is fixed in the guide groove that inserts the fixed bin plate on the chain by contiguous block.
Described some coal flashboard governor motions that is positioned at the coal bunker middle part divide left and right two, the lower drive shaft of left side coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the lower drive shaft by key, the cochain bye is enclosed within on the power transmission shaft, the last power transmission shaft of right coal flashboard governor motion is a driving shaft, upper sprocket wheel is fixed on the power transmission shaft by key, and the lower sprocket sky is enclosed within on the lower drive shaft.
Described some coal flashboard governor motions that is positioned at the coal bunker middle part divide a left side, in, right three, last power transmission shaft is a bearing, lower drive shaft is divided into a left side, right two sections, the lower drive shaft of left side coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the lower drive shaft by key, the cochain bye is enclosed within on the power transmission shaft, the lower drive shaft of right coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the power transmission shaft by key, the cochain bye is enclosed within on the power transmission shaft, the last power transmission shaft of middle coal flashboard governor motion is a driving shaft, and upper sprocket wheel is fixed on the power transmission shaft by key, and the lower sprocket sky is enclosed within lower drive shaft left side section or the right section of lower drive shaft.
The described coal cylinder that is installed in the feeding-coal bucket middle part is made up of a series cylinder of dislocation, the coal outer surface of cylinder that is positioned at coal flashboard below is provided with along the burr of cylinder axis direction, this coal drum shaft is installed on the feeding-coal bucket biside plate, and the overhanging cantilever end of coal drum shaft one side is equipped with sprocket wheel.
Compared with prior art, because being used for of having adopted that the present invention proposes just changeed the coal feeder of the segmentation of combustion coal chain boiler, have following advantage: how the horizontal airflow pressure that can consider burner hearth inside by the segmentation coal supply changes, also comprise and scurry wind, leak out, can adapt to this variation by regulating the coal seam thickness.The place that airflow pressure is big, it is thicker to supply with the coal seam, the place that airflow pressure is little, it is a little to supply with balk, accomplishes that finally only the burning-point cutoff is neat, and increase burning time, and burner hearth rear portion cold blast rate reduces, and fire box temperature improves, and the coal seam after-flame is more thorough.Facts have proved in a large number: fire box temperature generally can improve 50-150 ℃.If boiler tail is not provided with the water curtain dust arrester, the cold blast rate 10-30% that can descend.
Description of drawings:
Fig. 1 is the example structure schematic diagram that the present invention proposes.
Fig. 2 is the coal flashboard governor motion schematic diagram that is positioned at the feeding-coal bucket both sides.
Fig. 3 divides five sections schematic diagrames of arranging five coal flashboard governor motions along the fixed bin plate.
The specific embodiment:
Below in conjunction with accompanying drawing the specific embodiment is elaborated:
In one embodiment of the present of invention shown in Figure 1, a kind of coal feeder that is used for just changeing the segmentation of combustion coal chain boiler, comprise: be located at feeding-coal bucket 1 on the boiler body, be installed in the feeding-coal bucket middle part coal cylinder 2, stretch into the defeated coal traveling-grate stoker of body of heater inner chamber, do not provide among the figure, be installed in some coal flashboard governor motions that feeding-coal bucket coal cylinder top is arranged along 3 segmentations of fixed bin plate.Described some coal flashboard governor motions can be 3 or 4 or 5 or 6, and present embodiment is got 5, two of coal bunker fixed bin plate both sides, and three of left, center, right are divided in the middle part.The described coal flashboard governor motion that is positioned at feeding-coal bucket fixed bin plate both sides is made up of screw mandrel 31 and rolling bearing 32, coal flashboard 33, screw 34 and the guide groove 35 that is fixed on the fixed bin plate, as shown in Figure 2.Described screw mandrel 31 is fixed on the fixed bin plate 3 by rolling bearing 32, and the screw 34 that meshes with screw mandrel 31 is installed on the coal flashboard 33, and coal flashboard 33 inserts in the guide groove 35 of fixed bin plates.The overhanging end of screw mandrel can be installed the rotation ring flange, adopts manual method rotary screw rod, the flashboard rising of screw drive coal or the decline that promote or descend and be meshed with it.Also can adopt the method for the powered rotation screw mandrel of the subsidiary reduction gear box of motor to drive rising of coal flashboard or decline, regulate by actual needs.
Fig. 3 divides five sections schematic diagrames of arranging five coal flashboard governor motions along the fixed bin plate.Among the figure, three of the described coal flashboard governor motion branch left, center, right that are positioned at coal bunker middle part, last power transmission shaft 41 is a bearing, lower drive shaft is divided into left side section 421, right section 423, the lower drive shaft 421 of left side coal flashboard governor motion 7 is a driving shaft, the overhanging cantilever end of lower drive shaft 421 is equipped with worm and gear transmission case 72, and lower sprocket 431 is fixed on the lower drive shaft 421 by key, and upper sprocket wheel 441 skies are enclosed within on the power transmission shaft 41; The lower drive shaft 423 of right coal flashboard governor motion 9 is a driving shaft, the overhanging cantilever end of lower drive shaft 423 is equipped with worm and gear transmission case 92, lower sprocket 433 is fixed on the lower drive shaft 423 by key, upper sprocket wheel 443 skies are enclosed within on the power transmission shaft 41, the last power transmission shaft 41 of middle coal flashboard governor motion 8 is a driving shaft, the overhanging cantilever end of last power transmission shaft 41 is equipped with worm and gear transmission case 82, upper sprocket wheel 442 is fixed on the power transmission shaft 41 by key, and lower sprocket 432 skies are enclosed within lower drive shaft left side section 421 or the right section 423 of lower drive shaft.When need are regulated left coal flashboard governor motion 7, the worm and gear transmission case 72 of the overhanging cantilever end of rotatable lower drive shaft 421, driving lower drive shaft 421 rotates, then driving lower sprocket 431 rotates, drive gate sheet 71 by chain 4 again and move, regulate the thickness of coal-fired layer on these gate sheet 71 below fire grates.Because lower drive shaft is divided into left and right two sections, Gu the rotation of lower drive shaft left side section 421 does not influence the action of the right section 423 of lower drive shaft, in like manner, move so also do not influence each parts of middle coal flashboard governor motion 8 because upper sprocket wheel 441 skies of left coal flashboard governor motion are enclosed within on the power transmission shaft 41.Also can carry out same adjusting to middle coal flashboard governor motion 8, when the worm and gear transmission case 82 that rotates the overhanging cantilever end of going up drive bearing, thus the thickness of coal-fired layer on the fire grate of the open degree of the adjustable flashboard 81 of economizing on coal control below.In like manner, right coal flashboard governor motion 9 carries out same adjusting, regulates the open degree of coal flashboard 91.
The present invention also further takes following measure: the described coal cylinder 2 that is installed in the feeding-coal bucket middle part is made up of a series cylinder 21,22 of dislocation, coal cylinder 21 outer surfaces that are positioned at coal flashboard below are provided with the burr 23 along the cylinder axis direction, this coal drum shaft is installed on the interior floor of feeding-coal bucket, and the overhanging cantilever end of coal drum shaft one side is equipped with sprocket wheel.The rotational power of coal cylinder 21 can be taken from chain fire-gate drive unit, also power-driven mechanism can be set separately, the rotation direction of coal cylinder 21 is set to clockwise direction and rotates, coal cylinder 21 outer surfaces work to stir coal along the burr 23 of cylinder axis direction, coal descends from the probability of the coal roll banding that coal bunker top gravity falls, and helps the whereabouts of coal.
Mechanism of the present invention:
Existing theory is thought: the cross air dispatching inhomogeneities can have a strong impact on the efficient of chain furnace, is embodied on the boiler combustion operating mode the most tangible state and is exactly that to end the burning-point cutoff uneven.By traditional settling mode is the air feed structure that needs to improve air compartment, improves the uniformity of cross air dispatching, thereby improves the combustion conditions of chain furnace, improves the efficient of chain furnace.
The present invention looks for another way, think not by improving the air feed structure of air compartment, improve the uniformity of cross air dispatching, can adapt to uneven cross air dispatching by adjusting the thickness of supplying with the coal seam, it is neat to reach only burning-point cutoff, improve the combustion conditions of chain furnace, improve the efficient of chain furnace, this coal-feeding mode is called the segmentation coal supply.
Following situation often appears in fact laterally even air distribution transformation in the running of reality:
A. airflow pressure changes with the variation of weather, can't really obtain " evenly ".Thereby boiler cross air dispatching technology is restricted condition to wind, can not all-weather adapt to the airflow pressure that changes.The 6T/H combustion coal chain boiler of Shanghai XX pharmaceutcal corporation, Ltd for example, the uneven phenomenon of flame-out line and can't be when after the cross air dispatching technological transformation, still having by the air feed structural adjustment of air compartment.
B. by the behavior of " evenly " wind, the burner hearth air quantity reduces, the burning difficulty.The 20T/H combustion coal chain boiler of Shanghai XX heating power Co., Ltd for example, after the cross air dispatching technological transformation, the ignition zone air quantity reduces, and the difficulty of catching fire is not welcome by the fireman.
C. air distribution evenly and the coal seam level be two good inter-related preconditions of combustion conditions, chain furnace is in actual coal breakage process, accomplish that even horizontal coal breakage is very difficult, often be subjected to lump coal inequality, gravity and coal bunker shape to influence coal breakage inhomogeneous and change, evenly air distribution runs into uneven coal seam, combustion conditions is difficult to improve significantly, and the form of expression is exactly that only the burning-point cutoff is uneven.
The theory of segmentation coal supply is to scurry wind by regulating the variation that the coal seam thickness adapts to horizontal airflow pressure, wherein also comprising, leak out.Facts have proved in a large number: fire box temperature generally can improve 50-150 ℃.If boiler tail is not provided with the water curtain dust arrester, the cold blast rate 10-30% that can descend.
Economic benefit and social benefit:
The technology of the present invention can realize the economize on electricity of comprehensively economizing on coal, and reduces exhaust smoke level and has environment protecting.For having adopted the energy-conservation 3-5% of reaching of fire grate cross air dispatching optimisation technique, for not adopted the energy-conservation 5-10% of reaching of fire grate cross air dispatching optimisation technique.
According to XX Municipal Economic and Trade Commission openly, just changeing combustion coal chain boiler more than this city 4T/H in 2009 still has the 1000-1300 platform, rough estimates year 8000000 tons in consumption mark coal, if average energy-conservation 5%, year save 400,000 tons in mark coal.
If be generalized to the whole country, a year saving mark coal will be in 1,000,000 tons even more, and consequent market economy benefit is huge.
Embodiment 1.XX pharmaceutcal corporation, Ltd
2 6T/H of XX pharmaceutcal corporation, Ltd carry out technological transformation by the just commentaries on classics chained coal fired boiler that Wuhu Boiler Plant produces.
Before the transformation, blower fan has adopted converter technique, and air compartment has adopted fire grate cross air dispatching optimisation technique, the monitoring of boiler operatiopn on-line computer.
After the transformation, the ignition line reach, stable combustion condition, under load condition, burner hearth rear portion oxygen amount drops to 9% by 11%, 50 ℃ of the highest raisings of fire box temperature, when even if the weather temperature difference is very big, the flame-out line of grate afterbody also can keep neat substantially, and lump coal burns more thorough, and the cinder phosphorus content is dropped to below 10% by annual 13%.
Carry out the contrast of GDP specific energy consumption statistics by the computer online monitoring data.Forced-and-induced draft fan electrisity consumption on the basis of variable-frequency motor operation descends 10%, and coal vapour ratio has risen 5%.Two accumulative totals are saved 269 tons in mark coal, amount to 230,000 yuan, and the investment cost of whole technological transformation is 18.3 ten thousand yuan.The 9 wheat harvesting periods cost of recouping capital outlay.
Embodiment 2.XX heating power Co., Ltd
4 20T/H of XX heating power Co., Ltd carry out technological transformation by the just commentaries on classics chained coal fired boiler that the XX boiler factory produces.
Before the transformation, blower fan has adopted converter technique, and air compartment has adopted fire grate air distribution optimisation technique, fire grate lengthening technology, the monitoring of boiler operatiopn on-line computer.
After the transformation, ignition line reach, stable combustion condition, flame-out line is neat, and during the winter overload operation, repeatedly the test phosphorus content of slagging tap is reduced to 15% by 23%.Under load condition, burner hearth rear portion oxygen amount drops to 6% by 8%, and fire box temperature improves 100 ℃.
Consume 30,000 tons in mark coal this factory's year, accumulative total is saved 1000 tons in mark coal after the technological transformation, amounts to 850,000 yuan, and the investment cost of whole technological transformation is 710,000 yuan.The cost of recouping capital outlay in 10 months.
Embodiment 3.XX Heat Power Group steam power plant
6 64MW hot-water boilers of XX Heat Power Group steam power plant do not adopt fire grate cross air dispatching optimisation technique, and light rapidly in the face arch district after the technological transformation, and flame presents brilliant white.Under the situation of using identical ature of coal, and under the identical situation of exerting oneself, burnt zone differs two meters.The blow rate required and air inducing amount fall 10-15% on a year-on-year basis, survey statistics factually, and average coal saving rate 9% sees the following form.
| Coal about calorific value 4000 kilocalories | Before the technological transformation | After the technological transformation |
| Fire box temperature | About 500 ℃ | About 600 ℃ |
| Coal about calorific value 4500 kilocalories | Before the technological transformation | After the technological transformation |
| Fire box temperature | About 600 ℃ | About 750 ℃ |
| Coal about calorific value 5300 kilocalories | Before the technological transformation | After the technological transformation |
| Fire box temperature | About 750 ℃ | About 850 ℃ |
| Same coal burning | Before the technological transformation | After the technological transformation |
| The anterior coal supply thickness of fire grate | About 180mm | About 180mm |
| Back of furnace row slag thickness | About 80-100m | About 50mm |
| The phosphorus content of slagging tap | ＞10％ | About 5% |
Reach embodiment above in conjunction with the accompanying drawings and described embodiments of the present invention, the foregoing description is not purchased into limitation of the present invention, and all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within protection scope of the present invention.
Claims (5)
1. coal feeder that is used for just changeing the segmentation of combustion coal chain boiler, comprise the feeding-coal bucket of being located on the boiler body, be installed in the coal cylinder at feeding-coal bucket middle part, stretch into the defeated coal traveling-grate stoker of body of heater inner chamber, it is characterized in that, be installed in the coal flashboard governor motion that feeding-coal bucket coal cylinder top is arranged along the segmentation of fixed bin plate in addition, described coal flashboard governor motion is made up of the coal flashboard governor motion that is positioned at feeding-coal bucket fixed bin plate both sides and some coal flashboard governor motions that is positioned at the coal bunker middle part, the described coal flashboard governor motion of feeding-coal bucket fixed bin plate both sides that is positioned at is by screw mandrel and rolling bearing, the coal flashboard, screw and the guide groove that is fixed on the fixed bin plate are formed, described screw mandrel is fixed on the fixed bin plate by rolling bearing, be installed on the coal flashboard with the screw of screw mandrel engagement, the coal flashboard inserts in the guide groove of fixed bin plate; The described coal flashboard governor motion at coal bunker middle part that is positioned at is by upper and lower power transmission shaft, be installed in the upper and lower sprocket wheel on the upper and lower power transmission shaft, chain, coal flashboard, the guide groove that is fixed on the fixed bin plate are formed, upper and lower power transmission shaft is fixed on the feeding-coal bucket two side, the overhanging cantilever end of upper and lower power transmission shaft is equipped with the worm and gear transmission case, and the coal flashboard is fixed on the chain by contiguous block and inserts in the guide groove of fixed bin plate.
2. the coal feeder that is used for just changeing the segmentation of combustion coal chain boiler according to claim 1, it is characterized in that, described some coal flashboard governor motions that is positioned at the coal bunker middle part divide left and right two, the lower drive shaft of left side coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the lower drive shaft by key, and the cochain bye is enclosed within on the power transmission shaft, and the last power transmission shaft of right coal flashboard governor motion is a driving shaft, upper sprocket wheel is fixed on the power transmission shaft by key, and the lower sprocket sky is enclosed within on the lower drive shaft.
3. the coal feeder that is used for just changeing the segmentation of combustion coal chain boiler according to claim 1, it is characterized in that, described some coal flashboard governor motions that is positioned at the coal bunker middle part divide a left side, in, right three, last power transmission shaft is a bearing, lower drive shaft is divided into a left side, right two sections, the lower drive shaft of left side coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the lower drive shaft by key, the cochain bye is enclosed within on the power transmission shaft, the lower drive shaft of right coal flashboard governor motion is a driving shaft, lower sprocket is fixed on the power transmission shaft by key, the cochain bye is enclosed within on the power transmission shaft, the last power transmission shaft of middle coal flashboard governor motion is a driving shaft, and upper sprocket wheel is fixed on the power transmission shaft by key, and the lower sprocket sky is enclosed within lower drive shaft left side section or the right section of lower drive shaft.
4. the coal feeder that is used for just changeing the segmentation of combustion coal chain boiler according to claim 1 and 2, it is characterized in that, the described coal cylinder that is installed in the feeding-coal bucket middle part is made up of a series cylinder of dislocation, the coal outer surface of cylinder that is positioned at coal flashboard below is provided with along the burr of cylinder axis direction, this coal drum shaft is installed on the feeding-coal bucket biside plate, and the overhanging cantilever end of coal drum shaft one side is equipped with sprocket wheel.
5. the coal feeder that is used for just changeing the segmentation of combustion coal chain boiler according to claim 3, it is characterized in that, the described coal cylinder that is installed in the feeding-coal bucket middle part is made up of a series cylinder of dislocation, the coal outer surface of cylinder that is positioned at coal flashboard below is provided with along the burr of cylinder axis direction, this coal drum shaft is installed on the feeding-coal bucket biside plate, and the overhanging cantilever end of coal drum shaft one side is equipped with sprocket wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010195360 CN101963362A (en) | 2010-06-08 | 2010-06-08 | Segmented coal feeding device for forward fire coal chain boiler |
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| CN 201010195360 CN101963362A (en) | 2010-06-08 | 2010-06-08 | Segmented coal feeding device for forward fire coal chain boiler |
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Citations (6)
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| CN2093431U (en) * | 1991-01-31 | 1992-01-15 | 王晓静 | Telecontrolled electric driven lift cupboard for t.v. set |
| CN2287616Y (en) * | 1997-05-19 | 1998-08-12 | 山东省节能工程有限公司 | Multiple kind of coal screw cylinder laminated coal filling hopper |
| CN2608846Y (en) * | 2003-03-28 | 2004-03-31 | 赵文强 | Double sieve variable layed coal conveying device |
| CN2662092Y (en) * | 2003-11-21 | 2004-12-08 | 赵文强 | Double roller adjustable coal feeding device capable of changing coal distribution hierarchy |
| CN201387020Y (en) * | 2009-04-27 | 2010-01-20 | 赵青学 | Adjustable boiler |
| CN201688429U (en) * | 2010-06-08 | 2010-12-29 | 赵作明 | Sectional coal feeder for positive rotation coal-burning chain boiler |
-
2010
- 2010-06-08 CN CN 201010195360 patent/CN101963362A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2093431U (en) * | 1991-01-31 | 1992-01-15 | 王晓静 | Telecontrolled electric driven lift cupboard for t.v. set |
| CN2287616Y (en) * | 1997-05-19 | 1998-08-12 | 山东省节能工程有限公司 | Multiple kind of coal screw cylinder laminated coal filling hopper |
| CN2608846Y (en) * | 2003-03-28 | 2004-03-31 | 赵文强 | Double sieve variable layed coal conveying device |
| CN2662092Y (en) * | 2003-11-21 | 2004-12-08 | 赵文强 | Double roller adjustable coal feeding device capable of changing coal distribution hierarchy |
| CN201387020Y (en) * | 2009-04-27 | 2010-01-20 | 赵青学 | Adjustable boiler |
| CN201688429U (en) * | 2010-06-08 | 2010-12-29 | 赵作明 | Sectional coal feeder for positive rotation coal-burning chain boiler |
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Assignee: Shanghai golden card energy saving environmental protection technology Co Ltd Assignor: Zhao Zuoming| Lin Tao Contract record no.: 2011310000029 Denomination of invention: Segmented coal feeding device for forward fire coal chain boiler License type: Exclusive License Open date: 20110202 Record date: 20110401 |
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Open date: 20110202 |