CN1570508A - Rotary combustion flame centrifugation inert mass tangent edge downwards smoke discharging channel - Google Patents
Rotary combustion flame centrifugation inert mass tangent edge downwards smoke discharging channel Download PDFInfo
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- CN1570508A CN1570508A CN 03146146 CN03146146A CN1570508A CN 1570508 A CN1570508 A CN 1570508A CN 03146146 CN03146146 CN 03146146 CN 03146146 A CN03146146 A CN 03146146A CN 1570508 A CN1570508 A CN 1570508A
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- boiler
- burner
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- 238000002485 combustion reaction Methods 0.000 title claims description 118
- 238000005119 centrifugation Methods 0.000 title claims description 13
- 238000007599 discharging Methods 0.000 title claims description 5
- 239000000779 smoke Substances 0.000 title abstract description 17
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 241000628997 Flos Species 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000002352 surface water Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000004449 solid propellant Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000003517 fume Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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- Incineration Of Waste (AREA)
Abstract
The invention discloses a revolving burning flame acentric inert character tangent edge downward smoke vent burning technology, the invention is suitable to the boilers which has any angle to horizontal line, the oven wall which provides sealed top flame burning room, or all kinds of burner muzzle which has ejecting port on oven door and show inscribed direction with hearth inner wall, or nonhorizontal providing wind ejecting flame, or current refracted on hearth inner wall to form revolving burning flame; on the circumferential edge of revolving flame burning room oven wall fix exhausting flow port, which can regulate flue port board, as downward smoke vent of upward port; the revolving flame make lighter combustible centralize at low speed low pressure revolving and blend burning in burble centre; centrifugally separating more heavy inertia material and discharge downwards along with tangent trim. Inertia's temperature is lowed by trim heating surface and heat exchange efficiency is improved. Adopting the invention, visible fume of furnace is removed and simple, reliable and practical structure is created.
Description
Technical field:
The downward smokejack in rotary combustion flame centrifugation inertia matter tangent line edge relates to a kind of boiler non-smoke combustion technique scheme of method and structure combination, the present invention has widened and has made or transform existing various fuel boilers and set up the method for rotary combustion flame in the flame combustion chamber and in various and level the rotary combustion flame tangent line edge adapted downward smokejack structure of slanted angle is arranged, and reaches to make less boiler and maybe will have boiler transformation now and make it smokeless operation.
Background technology:
The present invention according on September 1st, 2002 first Chinese science man forum publish " in line to smoke return " paper from burning and on April 1st, 2003 application number to be 03121528.9 volatile matter get in the smoke return boiler development of the flame combustion chamber rotation air feed burning of binding; The air feed that horizontally rotates in known technology is set up rotary combustion flame and the downward smokejack of described smoke return is only applicable to solid fuel grate firing vertical boiler at burner hearth, for using horizontal boiler or tilt special-shaped and level have to use in the swirl flame combustion chamber of slanted angle and certainly lead to labyrinth, and the method that rotary combustion flame produces is single.
Summary of the invention:
The problem to be solved in the present invention is the downward smokejack technical scheme in swirl flame centrifugation inertia matter tangent line edge to be suitable for make various fuel less boilers, and can transform existing all kinds of irregular shaped pot stove fires combustion chamber, it is upwards in line to overcome its hot cigarette, or wears thorax and cross and to make the lightweight combustible be easy to the in line disadvantage of short circuit; Set up burner hearth rotary combustion flame and, make combustible fully mix rotary combustion with several different methods in the centrifugal vortex core of swirl flame district having the burner hearth furnace wall at tangent line edge of the rotary combustion flame of slanted angle to open downward smokejack with level; Centrifugation simultaneously goes out heavier inertia matter discharges continually from the downward smokejack at rotary combustion tangent line edge, is implemented in the imperfect combustion nuisance generation of eliminations in the flame combustion process and does not discharge the combustion chamber.
For solving the problems of the technologies described above, the present invention adopts binding and sealing all around, only around or on the burner hearth cambered surface furnace wall of the boiler flame combustion chamber in the oriented down smoke-discharging of lateral edges road or the fire door Fabric put to inboard wall of burner hearth (11) and be horizontal inscribe direction air feed, thereby reflect in the indoor furnace wall of flame combustion and to become to horizontally rotate wind, make volatile matter that solid fuel separates out in high-temperature burner hearth, mix formation rotary combustion flame with rotation wind, technical method and structure that it increases newly are, on the inboard wall of burner hearth (11) or fire door (2) that adapt to the boiler fire burns chamber of any angle of horizontal tilt, the dress ejiction opening be inboard wall of burner hearth (11) be inscribe direction Fabric put gas burner nozzle or Oil Burner Nozzles or coal burner nozzle or non-level to the flame combustion chamber along inboard wall of burner hearth (11) inscribe direction air feed nozzle (7); It is that independent Fabric puts (see figure 3) or two or more nozzle mixing Fabric puts (see figure 5) that above-mentioned gas burner nozzle or Oil Burner Nozzles or coal burner nozzle or non-level are the inscribe direction to flame combustion chamber air feed nozzle (7) at flame combustion chamber inboard wall of burner hearth (11), under above-mentioned all kinds of nozzle ejectas or burner nozzle (3) jet flames dynamic action, form burner hearth rotary combustion flame (1) along the refraction of flame combustion chamber inboard wall of burner hearth; On the furnace wall at the tangent line edge of rotary combustion flame (1), one side or bilateral are opened downward smokejack (6), the centrifugal vortex core of rotary combustion flame (1) district (12) that floats on the combustible lighter in the boiler combustion in the closed-top combustion chamber is concentrated fully mix rotary combustion; Rotating centrifugal is isolated downward smokejack (6) the continually downwards discharge of heavier inertia matter from rotary combustion flame tangent line edge simultaneously.
For reducing the rotational resistance of rotary combustion flame, first-selection should be round or formalizes by set nozzle ejection ejecta primary air rotational trajectory refraction test when design flame combustion chamber, simple effective ways are that cold conditions simulation position adjustable and direction nozzle are dried to the burner hearth of adjustable simulation boiler flame combustion chamber inwall (11) shape, make every effort to spray distinguished and admirable along inboard wall of burner hearth (11) inscribe direction, constantly change nozzle location and injection direction, and the arc shape of change simulated hearth inwall, when blowing-out, when making rotation wind perdurabgility of inboard wall of burner hearth (11) inscribe the longest in order to determine burner hearth shape and various nozzle branch Fabric position and injection direction at flame combustion chamber burner hearth wall (11).
Transforming the special-shaped flame combustion of existing boiler chamber, set up rotary combustion flame within it and should find out position and the injection direction that aforementioned all kinds of jet blowers are determined in the concrete test of inboard wall of burner hearth (11) plane of refraction by forming swirl flame, when the boiler furnace of transforming special-shaped flame combustion chamber, existing band dead angle is set up rotation wind, should increase cambered surface water conservancy diversion water-cooling wall (10) at position, burner hearth dead angle (9), or when need improve the rotary combustion flame temperature, should increase rotary combustion flame refraction cambered surface water conservancy diversion accumulation of heat chimney arch and block the dead angle, with the make a fire formation of flame of water conservancy diversion refraction burner hearth rotation flame.
It is that key is to dispose downward smokejack (6) at inclination rotary combustion flame tangent line edge indoor the carrying out of flame combustion of binding and sealing all around that the present invention adopts rotary combustion flame to make the condition of combustible and the oxygen supply fully unlimited rotation mixed combustion in the centrifugal vortex core of burner hearth rotary combustion flame district (12); On the furnace wall at rotary combustion flame tangent line edge, flame combustion chamber, open toward the baffled structure of drainage port (5) of downward smokejack (6), further increase the rotation separative efficiency.Opening on the furnace wall at rotary combustion flame tangent line edge toward drainage port (5) dress of downward smokejack (6) is to prevent that fully the combustion product of rotation mixed combustion centrifugation does not enter downward smokejack (6) in advance, open in the burner hearth furnace wall at this rotary combustion flame tangent line edge toward the drainage port (5) at the tangent line edge, furnace wall of smokejack (6) downwards but the adjustable guiding floss hole baffle plate (4) of dress refraction water conservancy diversion gyration, stop refraction water conservancy diversion burner hearth rotary combustion flame with single or multiple adjustable guiding floss hole baffle plates (4), make it to discharge smoothly the inertia matter that swirl flame fully separates and water conservancy diversion is not discharged the combustion product that fully burning contains combustible, be to observe or test the burner hearth inward turning when turning to and change the rotary speed of combustion flame and make the formation of the rotary combustion flame that is complete fast in the burner hearth not have the slit that tangible bunchy flame pierces adjustable guiding floss hole baffle plate (4) by adjusting adjustable guiding floss hole baffle plate (4) in the boiler operatiopn repeatedly, and adjust adjustable guiding floss hole baffle plate (4) and turn to and reach chimney and do not have visible smoke evacuation (row is full to close under the condition of steam not having), when surveying the hydrocarbon value of chimney meatus transmitting smoke this moment and should reach minimum or approach zero, in order to determine that adjustable guiding floss hole baffle plate (4) is best refraction flow apron, and be locked, or open toward the tangent line edge drainage port in the fire-resistant aperture of smokejack downwards by the furnace wall that the physical dimension shape of the adjustable guiding floss hole baffle plate (4) of this locking is duplicated identical rotary combustion tangent line edge with refractory material, this makes and unlikely in the burner hearth that fixed dam by the fire-resistant barrier structure of the adjustable guiding floss hole plate washer (4) of this locking is applied in higher furnace temperature barrier structure is ablated, the end opening of the downward smokejack (6) at above-mentioned rotary combustion flame tangent line edge should be lower than going to the bottom of rotary combustion flame combustion chamber, and downward smokejack (6) end opening of not showing the high-end mouth of pipe of π type cross over pipe at spontaneous combustion convection equilibrium circulating combustion state with the fuel gas of guaranteeing in the closed-top combustion chamber is not gone to the bottom with burner hearth and caused high-end overflowing at same horizontal plane.
The present invention adopts rotary combustion flame centrifugation inertia matter, realizes the abundant rotation mixed combustion of combustible is made all to be water white inertia matter in the smoke evacuation in combustion flame, does not have the flammable organic compound of bonding; The inertia matter process of rotary combustion flame centrifugation is to wash away the furnace wall heating surface at rotating centrifugal repeatedly, make burner hearth rotary combustion flame wash away the outer fast rotational heat exchange of heating surface swirl flame in burner hearth by rotation and forms relative low temperature circle, increased substantially the heat exchange benefit of boiler and reduced from the temperature of flame combustion chamber discharge inertia matter along inboard wall of burner hearth along the tangent line edge.The present invention has eliminated boiler and has as seen discharged fume on the basis that dwindles the boiler volume simplified structure, started and made the simple and reliable utility structure of less boiler.
Description of drawings:
Fig. 1 becomes the downward smokejack schematic diagram in rotary combustion tangent line edge for existing horizontal internal combustion boiler improvement.
13 is air blast among the figure, 14 burners, 6 downward smokejacks, 15 boiler main combustion chambers, 16 main combustion chambers and the smoke evacuation partition wall between the boiler tail that is heated, the 17 boiler exhaust gas afterbody that is heated.
Fig. 2 is the A-A section of Fig. 1.
1 is rotary combustion flame among the figure, 2 fire doors, 3 burner nozzles, 4 adjustable guiding floss hole baffle plates, 5 drainage ports, 6 downward smokejacks, 7 air feed nozzles, 8 furnace walls, position, 9 burner hearth dead angle, 10 cambered surface water conservancy diversion water-cooling walls, 11 inboard wall of burner hearth, 12 centrifugal vortex core district.
Fig. 3 is the downward smokejack figure in the one-sided tangent line of swirl flame edge.
Among the figure: 14 burners, 2 fire doors, 3 burner nozzles, 11 inboard wall of burner hearth, 1 rotary combustion flame, 11 inboard wall of burner hearth, 12 centrifugal vortex core district, 4 adjustable guiding floss hole baffle plates, 6 downward smokejacks.
Fig. 4 is tilted to down smoke-discharging road figure for the inclination swirl flame.
Among the figure: 14 burners, 18 inclination swirl flames, 19 are tilted to the down smoke-discharging road.
Fig. 5 is the inclination swirl flame bilateral tangent line downward smokejack figure in edge.
Among the figure: 13 air blasts, 14 burners, 18 inclination swirl flames, 6 smokejacks.
The specific embodiment:
1, will have horizontal boiler combustor tail smoke evacuation now is created as rotary combustion centrifugation inertia matter and promptly becomes less boiler.
Fig. 1 becomes the downward smokejack schematic diagram in rotary combustion tangent line edge for existing horizontal internal combustion boiler improvement; Be in boiler furnace, to be divided into anterior main combustion chamber (15) and boiler exhaust gas to be heated and to increase main combustion chamber and smoke evacuation before the combustor tail between the afterbody and be heated and set up partition wall (16) between the afterbody, promptly using this partition wall (16) that boiler is divided into two breaks, and near the furnace wall, combustion chamber (8) of main combustion chamber (15) side of partition wall (16) or observe fire door (2) and go up burner nozzle and the air blast nozzle (3) that dress and inboard wall of burner hearth (11) are the inscribe direction, to the burner hearth jet flames with penetrate wind.Form burner hearth rotary combustion flame (1) along inboard wall of burner hearth (11) refraction, downward smokejack (6) is opened in furnace wall (8) at the tangent line edge of rotary combustion flame (1), and the lower end that makes downward smokejack is walked around the be heated furnace wall opening of afterbody of partition wall (16) and the smoke evacuation that boiler is cut apart by partition wall (16) and is communicated outside stove, Fig. 2 is the A-A profile of Fig. 1, obviously stop owing to partition wall (16), former combustion chamber wind and smoke has increased the furnace exhaust resistance by downward smokejack, but jet flames and the increase and an amount of air-supply and the air inducing that strengthens former boiler of penetrating the wind rotary power, make boiler discharge smoothly wind and smoke with make fuel can balance burning can rotate again and separates discharge inertia matter and do not make and send that air inducing is excessive wears thorax and mistake, can make existing boiler eliminate visible smoke evacuation fully, will have boiler improvement now and become less boiler.
2, set up the downward smokejack of rotary combustion flame and swirl flame tangent line edge at the conventional garbage incinerator equally, test shows that it is the jinx of boiler exhaust gas that rotary combustion flame separates inertia matter tangent line edge smokejack, fully can be with the waste incineration smokeless.
3, join the downward smokejack in rolling tangential edge by Fig. 3 and Fig. 4 Fig. 5 conceptual design rotary combustion flame, according to burner fuel kind difference, can make the gas fired-boiler of small-volume large-power output, oil burning boiler, pulverized-coal fired boiler, and on the basis of simplifying existing all kinds of boiler structures, make the further smokeless of boiler.
Claims (4)
1, the combustion technology of the downward smokejack in a kind of rotary combustion flame centrifugation inertia matter tangent line edge is suitable for and makes various fuel less boilers; Make light combustible be concentrated in the unlimited rotation mixed combustion in relative low speed low pressure rotation vortex core district in the boiler flame combustion chamber with rotary combustion flame centrifugal force; Rotating centrifugal is isolated heavier inertia matter and is arranged down from the continuous heavy of downward smokejack at rotary combustion flame tangent line edge; Known configurations be bind with the flame combustion chamber of sealing all around have annular downwards on the burner hearth cambered surface furnace wall of the boiler flame combustion chamber in smokejack or the oriented down smoke-discharging of parallel flame combustion chamber one side road or the fire door Fabric put blowing mouth and be horizontal inscribe direction air feed to flame combustion chamber inwall cambered surface, reflect to become to horizontally rotate wind and mix formation rotary combustion flame at flame combustion chamber inboard wall of burner hearth ( 11 ) with volatile matter in the solid fuel flame; It is characterized in that: being used for going up with ejiction opening with the inboard wall of burner hearth ( 11 ) of the boiler flame combustion chamber of any angle of horizontal tilt or fire door ( 2 ) in adaptation is that flame combustion chamber inboard wall of burner hearth ( 11 ) is inscribe direction Fabric and puts gas burner nozzle or Oil Burner Nozzles or coal burner nozzle or non-level and be inscribe direction air feed nozzle ( 7 ) to the flame combustion chamber along inboard wall of burner hearth ( 11 ) ; (11) are inscribe direction air feed nozzle (7) to be the inscribe direction at flame combustion chamber inboard wall of burner hearth (11) are that independent Fabric puts or two or more nozzle mixing Fabric puts to the flame combustion chamber along inboard wall of burner hearth for this gas burner nozzle or Oil Burner Nozzles or coal burner nozzle or non-level; Thereby jetting out flames or spray under the ejecta dynamic action at all kinds of burner nozzles (3) reflects into burner hearth rotary combustion flame (1) at boiler flame combustion chamber inwall (11), at rotary combustion flame (1) but the drainage port of the adjustable guiding floss hole baffle plate (4) of a side or double-side opening dress refraction water conservancy diversion gyration is downward smokejack (6) suitable for reading on the furnace wall of flame combustion chamber, tangent line edge.
2, by the described rotary combustion flame of the claim 1 centrifugation inertia matter downward smokejack in tangent line edge (6), it is characterized in that: the nozzle with cold conditions simulation position adjustable and direction is dried to the burner hearth of adjustable simulation boiler furnace inwall (11) shape, make every effort to spray distinguished and admirable along inboard wall of burner hearth (11) inscribe direction, constantly change position and its injection direction of nozzle, and the arc shape of change simulated hearth inwall (11), when blowing-out along rotation wind perdurabgility of burner hearth inscribe direction when the longest, in order to the burner hearth shape of determining the flame combustion chamber and the Fabric of institute nozzle branch Fabric position and injection direction at the burner hearth wall.
3, by the described rotary combustion flame of the claim 1 centrifugation inertia matter downward smokejack in tangent line edge (6), it is characterized in that: when being used to transform the flame combustion chamber that has boiler band dead angle,, increase the cambered surface water conservancy diversion accumulation of heat chimney arch of cambered surface water conservancy diversion water-cooling wall (10) or increase water conservancy diversion rotary combustion flame at position, burner hearth dead angle for realizing forming complete burner hearth swirl flame.
4, by the described rotary combustion flame of the claim 1 centrifugation inertia matter downward smokejack in tangent line edge (6), it is characterized in that at rotary combustion flame (1) but a side or bilateral are opened dress refraction water conservancy diversion gyration on the furnace wall of flame combustion chamber, tangent line edge adjustable guiding floss hole baffle plate (4) current drainage aperture is applied in the high-temperature flame chamber, be adjusted to best refraction flow apron locking back and be copied into fixed dam with refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146146 CN1570508A (en) | 2003-07-24 | 2003-07-24 | Rotary combustion flame centrifugation inert mass tangent edge downwards smoke discharging channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146146 CN1570508A (en) | 2003-07-24 | 2003-07-24 | Rotary combustion flame centrifugation inert mass tangent edge downwards smoke discharging channel |
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| Publication Number | Publication Date |
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| CN1570508A true CN1570508A (en) | 2005-01-26 |
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| CN 03146146 Pending CN1570508A (en) | 2003-07-24 | 2003-07-24 | Rotary combustion flame centrifugation inert mass tangent edge downwards smoke discharging channel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122933A (en) * | 2016-08-16 | 2016-11-16 | 李树藩 | Smokejack succi Nicotiana tabacum L. backspin unlimited rotary mixes by thermal technology downwards |
| US9578179B2 (en) | 2012-02-02 | 2017-02-21 | Tencent Technology (Shenzhen) Company Limited | Method, apparatus and system for transmitting multimedia data |
| CN107178788A (en) * | 2016-09-14 | 2017-09-19 | 王井明 | Heat-exchanger rig is washed away in smoke evacuation rotation |
| CN107490653A (en) * | 2017-03-10 | 2017-12-19 | 北矿检测技术有限公司 | A kind of cupel(lation) furnace |
-
2003
- 2003-07-24 CN CN 03146146 patent/CN1570508A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9578179B2 (en) | 2012-02-02 | 2017-02-21 | Tencent Technology (Shenzhen) Company Limited | Method, apparatus and system for transmitting multimedia data |
| CN106122933A (en) * | 2016-08-16 | 2016-11-16 | 李树藩 | Smokejack succi Nicotiana tabacum L. backspin unlimited rotary mixes by thermal technology downwards |
| CN106122933B (en) * | 2016-08-16 | 2019-03-29 | 李树藩 | Downward smokejack cigarette revolves unlimited rotary under water and mixes heated technique device |
| CN107178788A (en) * | 2016-09-14 | 2017-09-19 | 王井明 | Heat-exchanger rig is washed away in smoke evacuation rotation |
| CN107490653A (en) * | 2017-03-10 | 2017-12-19 | 北矿检测技术有限公司 | A kind of cupel(lation) furnace |
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Owner name: BEIJING QING RAN ENVIRONMENTAL TECHNOLOGY CO., LT Free format text: FORMER OWNER: LI DONGXUE Effective date: 20050304 |
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Effective date of registration: 20050304 Address after: 102200 Beijing Zhuang village Changping District Nan Shao Zhen Street No. 131 Applicant after: Beijing Qing Jie environmental protection technology Co.,Ltd. Address before: 102200 Beijing Zhuang village Changping District Nan Shao Zhen Street No. 131 Applicant before: Li Dongxue |
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