CN208649233U - A kind of high pressure soaking fast pyrogenation device - Google Patents
A kind of high pressure soaking fast pyrogenation device Download PDFInfo
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- CN208649233U CN208649233U CN201721861525.XU CN201721861525U CN208649233U CN 208649233 U CN208649233 U CN 208649233U CN 201721861525 U CN201721861525 U CN 201721861525U CN 208649233 U CN208649233 U CN 208649233U
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Abstract
The utility model is specifically related to a kind of high pressure soaking fast pyrogenation device, it include: pyrolysis apparatus cylinder, distributing device and heat accumulation type radiant tube, the heat accumulation type radiant tube includes: the first heat accumulation type radiant tube and the second heat accumulation type radiant tube, first heat accumulation type radiant tube and the second heat accumulation type radiant tube interlaced arrangement in the horizontal plane, and the length of first heat accumulation type radiant tube is greater than the length of second heat accumulation type radiant tube；Every layer of radiant tube is provided with more radiant tubes, and every layer of heat accumulation type radiant tube is radial in the horizontal direction is uniformly arranged, and the region that the annular barrel structure is formed is reaction zone.The utility model uses cylinder form, and top uses ellipsoid structure, and bottom uses pyramidal structure, and pressure resistance and heat-resisting ability are stronger, and discharging is smooth；It is applicable not only to low pressure and hyperbaric environment and is suitable for low temperature and high temperature environment.
Description
Technical field
The utility model belongs to petrochemical technology field, and in particular to a kind of high pressure soaking fast pyrogenation device.
Background technique
Fast pyrogenation refers under conditions of anaerobic or limit oxygen, and material is rapidly heated to pyrolysis required temperature, so that containing
Chemical bond rupture reaction rapidly occurs for carbon macromolecule, and the working environment of high temperature and pressure can be to the generating rate for improving thermal decomposition product
It improves a lot.Fast pyrogenation device is generally divided into the reaction units such as fluidized bed, moving bed, revolving bed at present, and utilization has
Two methods of carrier and carrier-free realize the requirement of the Temperature Distribution and heating rate in temperature field, however use heat carrier
Fast pyrogenation device is related to the uniformly distributed of carrier and raw material, mixing and reacts and downstream vector and semicoke product separate, again
It a series of complex technique such as preheats, convey again, failure rate is caused to improve, the whole thermal efficiency reduces.Also have indirect using carrier-free
Conduct heat pyrolysis apparatus, but heat transfer efficiency is low, and large-scale is more difficult, and is more the pyrolysis apparatus using rectangular section, this shape
The pyrolysis apparatus of formula is suitable only under the operating condition of middle low temperature, normal pressure and low pressure, is gone back at present for the fast pyrogenation device of high temperature and pressure
It need to further develop.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of high pressure soaking fast pyrogenation device, using cylinder form,
Top uses ellipsoid structure, and bottom uses pyramidal structure, and pressure resistance and heat-resisting ability are stronger, and discharging is smooth；Not only it is applicable in
In low pressure and hyperbaric environment and it is suitable for low temperature and high temperature environment；Relative to heat carrier rapid pyrolysis reactor, the pyrolysis
Device structure is simple, and performance is stablized, and reduces manufacturing cost, improves stock utilization；Whole system manufacture and installation are simple, continuously
Long operational time.
To solve the above problems, the technical solution adopted in the utility model are as follows:
A kind of high pressure soaking fast pyrogenation device, comprising: pyrolysis apparatus cylinder, distributing device and heat accumulation type radiant tube, wherein
The top of the pyrolysis apparatus cylinder is ellipsoid structure, and middle part is annular barrel structure, and bottom is pyramidal structure；
Be evenly arranged with multiple feed inlets in the ellipsoid structure, be equipped in the ellipsoid structure it is multiple with it is described into
The corresponding distributing device of material mouth, the region that the ellipsoid structure is formed are cloth area；
It is equipped with heat accumulation type radiant tube described in multilayer in the annular barrel structure, the heat accumulation type radiant tube includes: the first storage
Hot type radiant tube and the second heat accumulation type radiant tube, first heat accumulation type radiant tube and the second heat accumulation type radiant tube are in the horizontal plane
Interlaced arrangement, and the length of first heat accumulation type radiant tube is greater than the length of second heat accumulation type radiant tube；
Every layer of heat accumulation type radiant tube is provided with more heat accumulation type radiant tubes, and every layer of heat accumulation type radiant tube is in level side
Radial upwards to be uniformly arranged, the region that the annular barrel structure is formed is reaction zone；
The bottom of the pyramidal structure is evenly arranged with multiple coke outlets, and the region that the pyramidal structure is formed is discharging
Area.
Further, the pyrolysis apparatus cylinder is provided with heat insulating refractory material, and the pyrolysis apparatus cylinder is by 6-30mm's
Steel plate materials are made, the heat insulating refractory material with a thickness of 200-400mm.
Further, the number of the feed inlet and the distributing device is 4-12.
Further, the length of first heat accumulation type radiant tube is L, described equal to the difference of outer ring and inner ring radius
The length d of second heat accumulation type radiant tube is 1/4L ~ 3/4L；
The caliber of the heat accumulation type radiant tube is the distance between 100-600mm, heat accumulation type radiant tube described in upper layer and lower layer
For 2000-3000mm, the heat accumulation type radiant tube is provided with 6-12 layers, and every layer is provided with 8-12 root heat accumulation type radiant tube.
Further, further include pyrolysis gas outlet, be set to the top of the discharge zone.
Further, the number of the coke outlet is 4-12.
Further, the intracorporal absolute pressure of pyrolysis apparatus cylinder is 0-600KPa, and temperature is 500-1000 DEG C.
Further, the central diameter of the pyrolysis apparatus cylinder is 3-20m, is highly 6-50m, and the spacing of inner ring and outer ring is 1-
5m。
Further, the distributing device is located at the feed inlet lower part, and the center line of the distributing device and the charging
The center line of mouth is overlapped.
Further, the heat accumulation type radiant tube is made of heat-resistant steel, and the pipe thickness of the heat accumulation type radiant tube is 8-
15mm。
The utility model has the beneficial effects that:
(1) cylinder form is used, top uses ellipsoid structure, and bottom uses pyramidal structure, pressure resistance and high temperature resistant energy
Power is stronger, and discharging is smooth；It is applicable not only to low pressure and hyperbaric environment and is suitable for low temperature and high temperature environment；
(2) relative to heat carrier rapid pyrolysis reactor, the pyrolysis apparatus structure is simple, performance stablize, reduce manufacture at
This, improves stock utilization；Whole system manufacture and installation are simple, and continuous operating time is long；
(3) diversification and enlargement may be implemented according to production-scale size in pyrolysis apparatus, and system is easily industrialized；
Pyrolysis can be made more thorough under high temperature and high pressure environment, the yield of pyrolysis gas is higher；
(4) pyrolysis apparatus can adjust internal temperature according to the requirement of thermal decomposition product and pressure, radiant tube are adopted in the horizontal direction
With length radiant tube arranged for interval, so that the material rate of heat addition of pyrolysis apparatus inner and outer ring is consistent.
Detailed description of the invention
Fig. 1 is the utility model high pressure soaking fast pyrogenation device overall structure figure.
Fig. 2 is the long and short radiant tube arrangement schematic diagram of the utility model heat accumulating type.
Wherein, 1. pyrolysis apparatus cylinder；2. the long radiant tube of heat accumulating type；3. the short radiant tube of heat accumulating type；4. feed inlet；5. cloth
Device；6. pyrolysis gas outlet；7. coke outlet.
Specific embodiment
In order to enable those skilled in the art to better understand the technical solutions of the present invention, combined with specific embodiments below
The utility model is described in further detail.It note that the embodiments described below is exemplary, be only used for explaining this
Utility model, and should not be understood as limiting the present invention.Particular technique or condition are not specified in embodiment, according to this
Technology or conditions described in document in field are carried out according to product description.Production is not specified in agents useful for same or instrument
Manufacturer person, being can be with conventional products that are commercially available.
The requirement of downstream process is answered, pyrolysis gas needs to realize the conveying of high temperature and pressure, however existing rectangular section at present
No heat carrier rapid pyrolysis device is suitable only for low-pressure delivery, is not able to satisfy process requirements.The utility model and existing rectangle are cut
Face is compared without heat carrier rapid pyrolysis device, and the wider structure of the scope of application is more reliable.The structure type of cartridge type is in contrast first
Bearing capacity is stronger, and more evenly, stability is more preferable for structure stress, to greatly simplify the complexity of structure, improves material
Expect utilization rate, greatly reduces manufacturing cost, and can satisfy the working environment of more high internal pressure and higher temperature.
One aspect according to the present utility model, the utility model provide a kind of high pressure soaking fast pyrogenation device, and Fig. 1 is
The utility model high pressure soaking fast pyrogenation device overall structure figure, as shown in Figure 1, comprising: pyrolysis apparatus cylinder, distributing device and accumulation of heat
The long radiant tube of formula, wherein the top of the pyrolysis apparatus cylinder is ellipsoid structure, and middle part is annular barrel structure, and bottom is taper
Structure；It is evenly arranged with multiple feed inlets in the ellipsoid structure, is equipped with the multiple and charging in the ellipsoid structure
The corresponding distributing device of mouth, the region that the ellipsoid structure is formed are cloth area；It is equipped with described in multilayer in the annular barrel structure
Heat accumulation type radiant tube, the heat accumulation type radiant tube include: the first heat accumulation type radiant tube and the second heat accumulation type radiant tube, and described first
Heat accumulation type radiant tube is the long radiant tube of heat accumulating type, and second heat accumulation type radiant tube is the short radiant tube of heat accumulating type, the heat accumulating type
Short radiant tube and the long radiant tube of heat accumulating type interlaced arrangement in the horizontal plane；Every layer of radiant tube is provided with more radiant tubes, and every layer
The heat accumulation type radiant tube is radial in the horizontal direction to be uniformly arranged, and the region that the annular barrel structure is formed is reaction
Area；The bottom of the pyramidal structure is evenly arranged with multiple coke outlets, and the region that the pyramidal structure is formed is discharge zone.
Material is entered in pyrolysis apparatus cylinder by feed inlet, by distributing device uniform distribution, then passes through the accumulation of heat of high temperature
The long radiant tube of formula and the short radiant tube of heat accumulating type, material in dropping process with the intracorporal high-temperature gas of pyrolysis apparatus cylinder and radiant tube
Pyrolytic reaction promptly occurs for contact, generates pyrolysis gas and semicoke, and the semicoke that final reaction generates is discharged by coke outlet, high
Warm is vented one's spleen to be exported by pyrolysis gas outlet.
The reactor device cylinder of the utility model is designed using cylindrical structure, is formd in pyrolysis apparatus cylinder from top to bottom point
Expect area, reaction zone and the part of discharge zone three, the outer ring barrel of pyrolysis apparatus cylinder bears the effect of internal pressure, radiant tube and endocyclic tube
Wall is respectively subjected to the effect of external pressure, in order to reach the technique requirement of high pressure, the steel of pyrolysis apparatus cylinder outer ring barrel and inner ring barrel
Plate thickness takes 6 ~ 30mm according to pressure and diameter difference；Top uses the form of ellipsoid structure end socket, and bottom uses taper knot
The form of structure end socket, not only can with heatproof resistance to compression but also can be smooth in order to the whereabouts of material, the taper angle theta of pyramidal structure preferably≤
90°；The heat insulating refractory material that pyrolysis apparatus cylinder wall is laid with 200mm ~ 400mm is used to prevent the dissipation of heat, pyrolysis apparatus cylinder
Central diameter be preferably sized to 3 ~ 20m, can be adjusted according to production scale, the height of pyrolysis apparatus cylinder should meet biomass in pyrolysis apparatus
The inner width (i.e. the spacing of inner ring barrel and outer ring barrel) of the requirement of interior residence time, preferably 6 ~ 50m, pyrolysis apparatus cylinder is preferred
For 1 ~ 5m.
Specific embodiment according to the present utility model, feed inlet be located at the top of pyrolysis apparatus be sub-material area top, and
Feed inlet on horizontal position at the top of pyrolysis apparatus, can be along middle through center line or in center line and outer ring along annular top
Between, with identical even angle dispersed placement, material is uniformly dispersed so that distributing device is easier.For sub-material area,
Inner wall surface thereof is tapered or ellipsoid surface structure；Distributing device is located at feed inlet lower part, that is, sub-material area top, center line with into
Material mouth center line corresponds, and quantity is depending on the quantity of feed inlet；Distributing device can uniformly disperse the material of whereabouts
To each region；The number of feed inlet and distributing device can be set to 4 ~ 12；
The main heating source of the long radiant tube of multilayer heat accumulating type and the short radiant tube of heat accumulating type as rapid pyrolysis apparatus, in pyrolysis apparatus
It is interior to be distributed along body height direction with same intervals, and every layer of heat accumulation type radiant tube is in the horizontal direction along between certain angle
It is evenly dispersed in order to falling material every being evenly arranged.Since the cylindrical structure of pyrolysis apparatus causes the different of inside and outside annular space
It causing, feeding inlet then feeds in a manner of uniform distribution, it certainly will will cause the much extra inner ring of material of outer ring in this way, therefore in order to
The uneven heating of material is avoided to must be accorded to the more heats of outer ring to be pyrolyzed material, so using length radiant tube arranged for interval
Mode come heat needed for reaching inner and outer ring.Fig. 2 is the long and short radiant tube arrangement schematic diagram of the utility model heat accumulating type, such as Fig. 2
Shown, the long radiant tube of heat accumulating type and the short radiant tube interlaced arrangement of heat accumulating type can make the Temperature Distribution of inner ring and outer rings more equal
It is even, particle phase volume fraction more evenly so that reaction zone form one or more uniform temperature field with meet pyrolysis needed for
Temperature, and staggered arrangement is conducive to material further being uniformly dispersed in dropping process, short radiant tube up and down
Setting avoid because of inner and outer ring diameter difference caused by furnace cavity thermic load it is uneven.The caliber of radiant tube preferably 100 ~
600mm, the radiant tube of adjacent two layers carries out interlaced arrangement in vertical direction, and distance is preferably between upper layer and lower layer radiant tube
1000 ~ 4000mm, the long radiant tube of heat accumulating type and the short radiant tube of heat accumulating type interlaced arrangement in the horizontal plane, while each radiant tube can
To be carried out that temperature is adjusted flexibly according to the demand of downstream product, to obtain reliable and stable temperature field, and then export good
Product quality.The total height of the radiant tube number of plies should meet the requirement that biomass reverse answers institute's calorific requirement and biomass fall time, can
5 ~ 12 layers are arranged from up to down, and every layer number is set, generally 8 ~ 60 according to actually required heat and pyrolysis apparatus central diameter size
It is a or other, long radiant tube and short radiant tube interlaced arrangement.The length of long radiant tube is L, equal to outer ring and inner ring radius
Difference, the length d of short radiant tube is depending on the ratio of inner and outer ring radiating surface, preferably d=1/4L ~ 3/4L length；Radiant tube
Using heat resisting cast steel, different with radiation pipe diameter according to pressure to adapt to long term high temperature operating condition, wall thickness selects 8 ~ 15mm.Pyrolysis
Gas outlet is set to the side lower part of pyrolysis apparatus, and the top of discharge zone generates a large amount of pyrolysis gas and make this during pyrolytic reaction
Pressure in pyrolysis apparatus gradually rises, and biggish internal pressure drives so that pyrolysis gas is quickly exported from outlet.Pyrolysis gas outlet is set
It sets in lower part, particle have passed through entire pyrolysis apparatus from top to bottom, when pyrolysis gas outlet is in communication with the outside, there is pressure conversion device,
It is more complete with its pyrolysis of sening as an envoy to of the direct band of pyrolysis gas to avoid powder particles, relative to top and middle part, pyrolysis gas outlet is set,
The carrying granule number in gas is reduced, the purity of gas is improved.At least one or multiple will be arranged in pyrolysis gas outlet, specifically
Quantity combines pyrolysis tolerance and deduster ability to determine.
Specific embodiment according to the present utility model, discharge zone are located at the lower part of pyrolysis apparatus, and inner wall surface thereof is in back taper knot
Structure, the structure of back taper are convenient for collecting the semicoke product of pyrolytic reaction.The lower part i.e. pyrolysis apparatus cylinder of discharge zone is arranged in coke outlet
The bottom of the pyramidal structure of body, semicoke export pyrolysis apparatus by coke outlet by self weight and the comprehensive function of upper layer semicoke gravity.
The number of coke outlet is preferably 4 ~ 12, is uniformly arranged on the pyrolysis apparatus cylinder body bottom；
In some specific embodiments of the utility model, all solder joints of fast pyrogenation device are welded using air-tightness,
The all high temperature resistants of charging and discharging, high-tension apparatus；The absolute pressure P that can be born in pyrolysis apparatus cylinder is preferably 0 ~ 600KPa, is led to
The temperature of adjustment radiant tube is crossed to realize the temperature control of reactor, the intracorporal temperature T of cylinder can achieve 500 ~ 1000 DEG C.
In conclusion the high pressure soaking fast pyrogenation device of the utility model uses cylinder form, top uses ellipsoid knot
Structure, bottom use pyramidal structure, and pressure resistance and heat-resisting ability are stronger, and discharging is smooth；It is applicable not only to low pressure and hyperbaric environment
And it is suitable for low temperature and high temperature environment；Relative to heat carrier rapid pyrolysis reactor, the pyrolysis apparatus structure is simple, and performance is steady
It is fixed, manufacturing cost is reduced, stock utilization is improved；Whole system manufacture and installation are simple, and continuous operating time is long；Pyrolysis apparatus
Diversification and enlargement may be implemented according to production-scale size, system is easily industrialized；It can under high temperature and high pressure environment
So that pyrolysis is more thorough, the yield of pyrolysis gas is higher；Pyrolysis apparatus can adjust internal temperature and pressure according to the requirement of thermal decomposition product
Power, radiant tube use length radiant tube arranged for interval in the horizontal direction, so that the material rate of heat addition one of pyrolysis apparatus inner and outer ring
It causes.
In the description of the present invention, it should be understood that term " first ", " second " are used for description purposes only, and
It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result,
The feature of " first ", " second " can explicitly or implicitly include one or more of the features.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
It inside can make changes, modifications, alterations, and variations to the above described embodiments, at the same time, for those skilled in the art, foundation
The thought of the application, there will be changes in the specific implementation manner and application range.
Claims (10)
1. a kind of high pressure soaking fast pyrogenation device characterized by comprising pyrolysis apparatus cylinder, distributing device and heat accumulation type radiant tube,
Wherein,
The top of the pyrolysis apparatus cylinder is ellipsoid structure, and middle part is annular barrel structure, and bottom is pyramidal structure；
It is evenly arranged with multiple feed inlets in the ellipsoid structure, is equipped with the multiple and feed inlet in the ellipsoid structure
Corresponding distributing device, the region that the ellipsoid structure is formed are cloth area；
It is equipped with heat accumulation type radiant tube described in multilayer in the annular barrel structure, the heat accumulation type radiant tube includes: the first heat accumulating type
Radiant tube and the second heat accumulation type radiant tube, first heat accumulation type radiant tube and the second heat accumulation type radiant tube interlock in the horizontal plane
Arrangement, and the length of first heat accumulation type radiant tube is greater than the length of second heat accumulation type radiant tube；
Every layer of heat accumulation type radiant tube is provided with more heat accumulation type radiant tubes, and every layer of heat accumulation type radiant tube is in the horizontal direction
Radial to be uniformly arranged, the region that the annular barrel structure is formed is reaction zone；
The bottom of the pyramidal structure is evenly arranged with multiple coke outlets, and the region that the pyramidal structure is formed is discharge zone.
2. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the pyrolysis apparatus cylinder is provided with
Heat insulating refractory material, the pyrolysis apparatus cylinder are made of the steel plate materials of 6-30mm, the heat insulating refractory material with a thickness of
200-400mm。
3. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the feed inlet and the distributing device
Number be 4-12.
4. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that
The length of first heat accumulation type radiant tube is L, equal to the difference of outer ring and inner ring radius, the second heat accumulating type radiation
The length d of pipe is 1/4L~3/4L；
The caliber of the heat accumulation type radiant tube is 100-600mm, and the distance between heat accumulation type radiant tube described in upper layer and lower layer is
2000-3000mm, the heat accumulation type radiant tube are provided with 6-12 layers, and every layer is provided with 8-12 root heat accumulation type radiant tube.
5. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that further include pyrolysis gas outlet, set
It is placed in the top of the discharge zone.
6. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the number of the coke outlet is 4-12
It is a.
7. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the pyrolysis apparatus cylinder is intracorporal absolutely
Pressure is 0-600KPa, and temperature is 500-1000 DEG C.
8. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the central diameter of the pyrolysis apparatus cylinder is
3-20m is highly 6-50m, and the spacing of inner ring and outer ring is 1-5m.
9. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the distributing device is located at the charging
Mouth lower part, and the center line of the distributing device is overlapped with the center line of the feed inlet.
10. high pressure soaking fast pyrogenation device according to claim 1, which is characterized in that the heat accumulation type radiant tube is by resistance to
Hot steel is made, and the pipe thickness of the heat accumulation type radiant tube is 8-15mm.
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| CN201721861525.XU CN208649233U (en) | 2017-12-27 | 2017-12-27 | A kind of high pressure soaking fast pyrogenation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936993A (en) * | 2017-12-27 | 2018-04-20 | 北京神雾电力科技有限公司 | A kind of high pressure soaking fast pyrogenation device |
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2017
- 2017-12-27 CN CN201721861525.XU patent/CN208649233U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936993A (en) * | 2017-12-27 | 2018-04-20 | 北京神雾电力科技有限公司 | A kind of high pressure soaking fast pyrogenation device |
| CN107936993B (en) * | 2017-12-27 | 2024-04-02 | 北京恒丰亚业科技发展有限公司 | High-pressure soaking fast pyrolyzer |
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Effective date of registration: 20230529 Address after: 414018 No. 1, Baihua Avenue, Qianlianghu Town, Junshan District, Yueyang City, Hunan Province (in the yard of Hunan Jingtianren Paper Co., Ltd.) Patentee after: Hunan Dongqi Biomass Energy Co.,Ltd. Address before: 102209 226, 2 / F, building 71, 30 Litang Road, Changping District, Beijing Patentee before: Beijing Hengfeng Yaye Technology Development Co.,Ltd. |