CN108645016A - The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type - Google Patents
The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type Download PDFInfo
- Publication number
- CN108645016A CN108645016A CN201810586520.3A CN201810586520A CN108645016A CN 108645016 A CN108645016 A CN 108645016A CN 201810586520 A CN201810586520 A CN 201810586520A CN 108645016 A CN108645016 A CN 108645016A
- Authority
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- China
- Prior art keywords
- smoke
- flue
- furnace body
- pipe
- combustion chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 74
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000002028 Biomass Substances 0.000 title claims abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
- F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
- F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
- F24H1/285—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged alongside the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
- F23B40/02—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed by scattering over the fuel-supporting surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
- F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1845—Arrangement or mounting of combustion heating means, e.g. grates or burners using solid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The present invention relates to the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type, belong to boiler technology field.Present invention mainly solves the technical problems that thermal loss is big existing for existing boiler, utilization efficiency of heat energy is low.The technical scheme is that：The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type, including furnace body, feed bin, feeding system, pressure fan, flue, air-introduced machine and smoke exhaust pipe, wherein：The feed bin is located at furnace body side and is connect with the feed inlet on sidewall of the furnace body top by feeding system；The flue is located at vertically in the water-cooling wall of the furnace body other side；The smoke exhaust pipe is located at vertically close to flue side outside furnace body, and the air-introduced machine is located above flue, and the pressure fan is located at outside furnace body close to one side bottom of feed bin.The present invention has many advantages, such as that simple in structure, heat exchange efficiency is high, safe and practical, reasonable in design.
Description
Technical field
The invention belongs to boiler technology fields, the more particularly to efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type.
Background technology
As society is to the growing of energy demand, the fossil fuel as main energy sources source is reduced promptly,
Regenerative resource demand also increasingly increases, and biomass is a kind of ideal regenerative resource, it is derived from a wealth of sources, and has every year a large amount of
Industry, agricultural and forest waste output, as the corncob of China's either northern area, stalk or southern rice
The renewable resources such as shell, bagasse, cocoanut shell are very abundant, are replaced with it or part replaces fire coal, can brought for enterprise abundant
Economy return, on the other hand, biomass energy are a kind of clean reproducible energies, and CO2 emission is utilized close to zero
Biomass energy all plays an important role environmental protection, improvement ecology, raising life of farmers level etc..
But biomass boiler combustion chamber in the prior art or separated with furnace body, or be arranged in boiler side, it is unfavorable for
The disadvantages such as the efficiency of boiler is converted, and that there are thermal loss is big, utilization efficiency of heat energy is low.
Invention content
It is an object of the invention to overcome the prior art, it is special to provide the efficiently low nitrogen biomass of the U-shaped smoke pipe of integral type
With boiler, the technical problem that thermal loss is big, utilization efficiency of heat energy is low is solved existing for existing boiler.
The present invention is achieved by the following technical solutions：
The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type, including furnace body, feed bin, feeding system, pressure fan, cigarette
Road, air-introduced machine and smoke exhaust pipe, wherein：
Combustion chamber is equipped in the furnace body, combustion chamber lower sides are equipped with igniter, and combustion chamber inner cavity lower part is equipped with fire grate,
Lower smoke-box is equipped with below combustion chamber, lower smoke-box side wall is equipped with fire door, and the inboard wall of furnace body is equipped with water-cooling wall, the combustion chamber circumference
Water-cooling wall in vertical direction be uniformly provided with several smoke pipes, pass through the U-shaped smoke pipe of interior row and burning respectively at the top of several smoke pipes
Room is connected to, and several smoke pipe bottoms are connected to lower smoke-box respectively；
The feed bin is located at furnace body side and is connect with the feed inlet on sidewall of the furnace body top by feeding system；The flue
It is located in the water-cooling wall of the furnace body other side vertically；The smoke exhaust pipe is located at outside furnace body vertically close to flue side, the air inducing
Machine is located above flue, and the pressure fan is located at outside furnace body close to one side bottom of feed bin；
The stack base is connected to lower smoke-box, is connect with air-introduced machine smoke inlet at the top of the flue；The smoke exhaust pipe bottom
Portion is equipped with flue gas heat recovery mouth, and smoke exhaust pipe smoke inlet is equipped in the middle part of the smoke exhaust pipe, is gone out equipped with smoke exhaust pipe at the top of the smoke exhaust pipe
Mouth；The outlet flue of the smoke exhaust pipe smoke inlet and air-introduced machine connect, the flue gas heat recovery mouth by off-gas recovery pipe with give
Air inlet connects, the smoke exhaust pipe outlet flue and atmosphere；An ajutage is equipped at the air outlet of the pressure fan
With secondary blast pipe, the pressure fan passes through two by an ajutage and the combustion chamber below fire grate, the pressure fan
Secondary ajutage and the combustion chamber above igniter.
Further, horizontal in the flue to be equipped with several recovery tubes, the recovery tubes both ends with water-cooling wall inner cavity
Connection.
Further, the combustion chamber inner cavity top is arc.
Further, the feed bin side wall is equipped with feed bin observation panel.
Further, the feeding system includes helical feeder, feeding motor and feed pipe.
The combustion chamber of the present invention is located in the middle part of furnace body, inboard wall of furnace body is equipped with water-cooling wall, flue is located at the furnace body other side vertically
Water-cooling wall in, be equipped with several smoke pipes in water-cooling wall, be equipped with several recovery tubes in flue and smoke evacuation bottom of the tube is equipped with flue gas
Recuperation of heat mouth can realize multiple heat exchange, so that heat is reached and discharge to greatest extent, reduce and passed to external radiation because of flame heat regulating
Loss caused by leading.Compared with prior art, the present invention is with simple in structure, heat exchange efficiency is high, safe and practical, structure design is closed
The advantages that reason.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type in the present embodiment, including furnace body 1,
Feed bin 2, feeding system 3, pressure fan 4, flue 5, air-introduced machine 6 and smoke exhaust pipe 7, wherein：
Combustion chamber 8 is equipped in the furnace body 1,8 lower sides of combustion chamber are equipped with igniter 9, and 8 inner cavity lower part of combustion chamber is equipped with
Fire grate 10,8 lower section of combustion chamber are equipped with lower smoke-box 11, and lower 11 side wall of smoke-box is equipped with fire door, and 1 inner wall of the furnace body is equipped with water-cooling wall
13, vertical direction is uniformly provided with several smoke pipes 14,14 top part of several smoke pipes in the water-cooling wall 13 of 8 circumference of the combustion chamber
It is not connected to combustion chamber 8 by the U-shaped smoke pipe 15 of interior row, 14 bottom of several smoke pipes is connected to lower smoke-box 11 respectively；
The feed bin 2 is located at 1 side of furnace body and is connect with the feed inlet of 1 side wall upper part of furnace body by feeding system 3；It is described
Flue 5 is located at vertically in the water-cooling wall 13 of 1 other side of furnace body；The smoke exhaust pipe 7 is located at 1 outside of furnace body close to flue 5 one vertically
Side, the air-introduced machine 6 are located at 5 top of flue, and the pressure fan 4 is located at 1 outside of furnace body close to 2 one side bottom of feed bin；
5 bottom of the flue is connected to lower smoke-box 11, and 5 top of the flue is connect with 6 smoke inlet of air-introduced machine；The smoke evacuation
7 bottom of pipe is equipped with flue gas heat recovery mouth 16, and 7 middle part of the smoke exhaust pipe is equipped with smoke exhaust pipe smoke inlet 17, and 7 top of the smoke exhaust pipe is set
There is smoke exhaust pipe outlet flue 18；The smoke exhaust pipe smoke inlet 17 is connect with the outlet flue of air-introduced machine 6, and the flue gas heat recovery mouth 16 is logical
It crosses off-gas recovery pipe 12 to connect with 4 air inlet of pressure fan, the smoke exhaust pipe outlet flue 18 and atmosphere；The pressure fan 4
An ajutage 19 and secondary blast pipe 20 are equipped at air outlet, the pressure fan 4 passes through under an ajutage 19 and fire grate 10
The combustion chamber 8 of side is connected to, and the pressure fan 4 is connected to by secondary blast pipe 20 with the combustion chamber 8 of 9 top of igniter.
Further, horizontal in the flue 5 to be equipped with several recovery tubes 21,21 both ends of the recovery tubes are and water-cooling wall
13 inner cavities are connected to.
Further, 8 inner cavity top of the combustion chamber is arc.
Further, 2 side wall of the feed bin is equipped with feed bin observation panel.
Further, the feeding system 3 includes helical feeder, feeding motor and feed pipe.
The course of work of the present invention：
In use, the fuel in feed bin 2 is sent into combustion chamber 8 from feed inlet by feeding system 3, igniter is then opened
9 light a fire, while starting pressure fan 4 and air-introduced machine 6；It can be to the recirculated water in the water-cooling wall 13 of 8 surrounding of combustion chamber after burning
It is heated；Flue gas after burning can be entered by the U-shaped smoke pipe 15 of interior row at 8 top of combustion chamber in several smoke pipes 14, and be passed through
Several smoke pipes 14 heat the recirculated water in water-cooling wall 8；It is right that flue gas enters lower smoke-box 11 after the outflow of several smoke pipes 14
Enter flue 5 afterwards, the recirculated water in water-cooling wall 8 is heated by several recovery tubes 21 in flue 5 and flue 5；Cigarette
Gas is introduced into smoke exhaust pipe 7 from after the outflow of flue 5 by air-introduced machine 6, the flue gas part in smoke exhaust pipe 7 by top smoke exhaust pipe smoke
Mouth 18 is discharged, and another part enters off-gas recovery pipe 12 from the flue gas heat recovery mouth 16 of bottom, is then sent again by pressure fan 4 again
Enter in combustion chamber 8, realizes the recycled for multiple times of heat.
The spirit or essence that the present invention can be embodied in a variety of forms without departing from invention, it should therefore be appreciated that on
It states embodiment and is not limited to details above-mentioned, and should widely be explained in claim limited range, therefore fall into right
It is required that or the variation in its equivalent scope and remodeling should be covered by the following claims.
Claims (5)
1. the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type, including furnace body (1), feed bin (2), feeding system (3), send
Wind turbine (4), flue (5), air-introduced machine (6) and smoke exhaust pipe (7), it is characterised in that：
Combustion chamber (8) are equipped in the furnace body (1), combustion chamber (8) lower sides are equipped with igniter (9), under combustion chamber (8) inner cavity
Portion is equipped with fire grate (10), and lower smoke-box (11) is equipped with below combustion chamber (8), and lower smoke-box (11) side wall is equipped with fire door, the furnace body (1)
Inner wall is equipped with water-cooling wall (13), and water-cooling wall (13) interior vertical direction of combustion chamber (8) circumference is uniformly provided with several smoke pipes
(14), it is connected to respectively with combustion chamber (8) by the U-shaped smoke pipe of interior row (15) at the top of several smoke pipes (14), several smoke pipes
(14) bottom is connected to lower smoke-box (11) respectively；
The feed bin (2) is located at furnace body (1) side and is connect with the feed inlet of furnace body (1) side wall upper part by feeding system (3)；
The flue (5) is located at vertically in the water-cooling wall (13) of furnace body (1) other side；The smoke exhaust pipe (7) is located at furnace body (1) outside vertically
Close to flue (5) side, the air-introduced machine (6) is located above flue (5) in portion, and the pressure fan (4) is located at outside furnace body (1) and leans on
(2) one side bottom of nearly feed bin；
Flue (5) bottom is connected to lower smoke-box (11), is connect with air-introduced machine (6) smoke inlet at the top of the flue (5)；It is described
Smoke exhaust pipe (7) bottom is equipped with flue gas heat recovery mouth (16), and smoke exhaust pipe smoke inlet (17) is equipped in the middle part of the smoke exhaust pipe (7), described
Smoke exhaust pipe outlet flue (18) is equipped at the top of smoke exhaust pipe (7)；The smoke exhaust pipe smoke inlet (17) and the outlet flue of air-introduced machine (6) connect
It connects, the flue gas heat recovery mouth (16) is connect by off-gas recovery pipe (12) with pressure fan (4) air inlet, the smoke exhaust pipe smoke
Mouth (18) and atmosphere；An ajutage (19) and secondary blast pipe (20), institute are equipped at the air outlet of the pressure fan (4)
It states pressure fan (4) to be connected to the combustion chamber (8) below fire grate (10) by an ajutage (19), the pressure fan (4) passes through
Secondary blast pipe (20) is connected to the combustion chamber (8) above igniter (9).
2. the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type according to claim 1, it is characterised in that：It is described
Horizontal in flue (5) to be equipped with several recovery tubes (21), recovery tubes (21) both ends are connected to water-cooling wall (13) inner cavity.
3. the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type according to claim 1, it is characterised in that：It is described
Combustion chamber (8) inner cavity top is arc.
4. the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type according to claim 1, it is characterised in that：It is described
Feed bin (2) side wall is equipped with feed bin observation panel.
5. the efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type according to claim 1, it is characterised in that：It is described
Feeding system (3) includes helical feeder, feeding motor and feed pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810586520.3A CN108645016A (en) | 2018-06-08 | 2018-06-08 | The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810586520.3A CN108645016A (en) | 2018-06-08 | 2018-06-08 | The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108645016A true CN108645016A (en) | 2018-10-12 |
Family
ID=63752177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810586520.3A Pending CN108645016A (en) | 2018-06-08 | 2018-06-08 | The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108645016A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073874A (en) * | 1980-04-10 | 1981-10-21 | Takahashi Y | Hot-water boiler |
| CN201068438Y (en) * | 2007-05-23 | 2008-06-04 | 钟正贤 | Carbide oven |
| CN202452669U (en) * | 2011-12-23 | 2012-09-26 | 张富春 | Smoke tube boiler |
| CN202470398U (en) * | 2012-03-08 | 2012-10-03 | 戴奎 | Normal-pressure, high-efficiency and energy-saving fire turning boiler |
| CN203489471U (en) * | 2013-08-22 | 2014-03-19 | 郑州豫懒环保锅炉有限公司 | Eccentric internal furnace type biomass boiler |
| CN203489473U (en) * | 2013-08-22 | 2014-03-19 | 郑州豫懒环保锅炉有限公司 | Layer-by-layer combustion type combustion chamber biomass boiler |
| CN205560926U (en) * | 2016-03-11 | 2016-09-07 | 天津市凯普森冷暖设备有限公司 | Three vertical return stroke biomass boiler |
| CN208567109U (en) * | 2018-06-08 | 2019-03-01 | 山西桐鑫宇环保设备有限公司 | The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type |
-
2018
- 2018-06-08 CN CN201810586520.3A patent/CN108645016A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073874A (en) * | 1980-04-10 | 1981-10-21 | Takahashi Y | Hot-water boiler |
| CN201068438Y (en) * | 2007-05-23 | 2008-06-04 | 钟正贤 | Carbide oven |
| CN202452669U (en) * | 2011-12-23 | 2012-09-26 | 张富春 | Smoke tube boiler |
| CN202470398U (en) * | 2012-03-08 | 2012-10-03 | 戴奎 | Normal-pressure, high-efficiency and energy-saving fire turning boiler |
| CN203489471U (en) * | 2013-08-22 | 2014-03-19 | 郑州豫懒环保锅炉有限公司 | Eccentric internal furnace type biomass boiler |
| CN203489473U (en) * | 2013-08-22 | 2014-03-19 | 郑州豫懒环保锅炉有限公司 | Layer-by-layer combustion type combustion chamber biomass boiler |
| CN205560926U (en) * | 2016-03-11 | 2016-09-07 | 天津市凯普森冷暖设备有限公司 | Three vertical return stroke biomass boiler |
| CN208567109U (en) * | 2018-06-08 | 2019-03-01 | 山西桐鑫宇环保设备有限公司 | The efficiently low nitrogen boiler special for biomass of the U-shaped smoke pipe of integral type |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |
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| RJ01 | Rejection of invention patent application after publication |