CN108940849A - A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device - Google Patents
A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device Download PDFInfo
- Publication number
- CN108940849A CN108940849A CN201810811758.1A CN201810811758A CN108940849A CN 108940849 A CN108940849 A CN 108940849A CN 201810811758 A CN201810811758 A CN 201810811758A CN 108940849 A CN108940849 A CN 108940849A
- Authority
- CN
- China
- Prior art keywords
- ash
- roller
- gray moving
- cabinet
- furnace bottom
- 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
- 239000010882 bottom ash Substances 0.000 title claims abstract description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000003245 coal Substances 0.000 title claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 14
- 239000002956 ash Substances 0.000 claims abstract description 55
- 238000013461 design Methods 0.000 claims abstract description 20
- 239000003818 cinder Substances 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/002—Ash and slag handling in pulverulent fuel furnaces
Abstract
The present invention relates to a kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen devices, including cabinet, gray moving roller, sifter, planar design has ash inlet on cabinet, bottom design has fine ash outlet, ash inlet is corresponded in cabinet and is sequentially installed with a gray moving master roller and multiple gray moving deputy roller cylinders diagonally downward, and gray moving master roller and multiple gray moving deputy roller cylinders are run simultaneously.The present apparatus devises the mode of multiple roller synchronous operation conveying furnace bottom ash materials, entire separating screen device is designed as the lesser independent entirety of a volume and is all-sealed structure, using material dispersion material sieving technology, conveying is reliable, and thickness separation effectively can be carried out to material, it solves the problems, such as that pulverized-coal fired boiler furnace bottom ash thickness separates, has that compact-sized, ingenious in design, small in size, independent entirety, all-sealed structure, occupancy boiler room space is small, equipment manufacturing cost is low, the huge advantages such as convenient for installation and maintenance.
Description
Technical field
The technology of the present invention belongs to pulverized-coal fired boiler, is related to the slag ash isolation technics of pulverized-coal fired boiler bottom ash, especially a kind of
Low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device.
Background technique
Pulverized-coal fired boiler has the characteristics that efficient, low emission, high degree of automation, and boiler furnace bottom ash generallys use pneumatic transporting
It sending mode that boiler fly ash is transported in storage tank, then is pulled away ash by grey vehicle, entire Ash Conveying System is enclosed construction,
Certain pressure is kept, there is certain the degree of automation, it is advantageous that: the labour for not only greatly reducing stoker personnel is strong
Degree, and ambient enviroment is not polluted, it is not only environmentally friendly but also efficient.
Furnace bottom ash ash disposal system is unable to operate normally due to being usually present the clinker coke button that burning generates in furnace bottom ash,
In actual motion, often occurs that stoker personnel is needed to go to draw coke button by hand, not only seriously polluted boiler room environment, increase department
The labor intensity of furnace personnel, simultaneously as needing high-temperature operation while pressure maintaining in boiler operatiopn, there is great labour
Danger, existing equipment in boiler room are difficult to realize the thickness separation of furnace bottom ash.Pulley type sub-sieve skill is developed in this context
Art can fundamentally solve the problems, such as that boiler furnace bottom ash transportation system is not normally functioning, make high-efficiency environment friendly high degree of automation
Pulverized-coal fired boiler has more extensive development prospect.
By the retrieval of patent document, do not find that be related to pulverized-coal fired boiler furnace bottom ash is separated using sub-sieve mode
Device and technology.
Summary of the invention
It is an object of the invention to solve Boiler Furnace bottom caused by the reasons such as existing coal powder boiler combustion coal is unstable
Ash needs sub-sieve problem, provide it is a kind of it is small in size, be skillfully constructed, the low nitrogen coal dust pot that design science, furnace bottom ash sub-sieve effect are good
Furnace furnace bottom ash pulley type separating screen device.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device, it is characterised in that: including cabinet, gray moving roller, sieve
Divide device, planar design has ash inlet on cabinet, and bottom design has fine ash outlet, ash inlet is corresponded in cabinet diagonally downward successively
One gray moving master roller and multiple gray moving deputy roller cylinders are installed, gray moving master roller and multiple gray moving deputy roller cylinders are run simultaneously；In gray moving
A sifter is installed in cabinet below master roller and gray moving deputy roller cylinder, which tilts to side-lower, inclines in sifter
A cinder is equipped in cabinet above tilted direction to export.
Moreover, the ash inlet position of plane is packaged with a plate on cabinet, one is fixed in the middle part of a side of the plate
Bulb, the bulb are coaxially fixedly mounted with a screw rod, which is engaged in swivel nut, and it is hand to be fixedly mounted with one in the screw rod end of the swivel nut other side
?.
Moreover, a flow-aid device is installed on the cabinet of lower section in the plate of ash inlet, the ash inlet in flow-aid device side
Place's design has one into grey deflector, and a fine ash deflector is also devised on the cabinet below gray moving master roller.
Moreover, being equipped with a controllable register on the cabinet of gray moving deputy roller cylinder upper side position, which passes through hinged shaft
Hinge dress, and it is fixedly mounted with a crank on the hinged shaft of side outside the enclosure, which the adjustment of baffle opening is adjusted by positioning disk.
Moreover, coaxial on the barrel outer surface of gray moving deputy roller cylinder and gray moving master roller be uniformly arranged at intervals with gray moving
Plate.
Moreover, filling a fine ash baffle by hinged shaft hinge in cinder exit.
Moreover, design has side to check that operation door and/or side check on the cabinet axially or radially of gray moving roller
Operate door.
The advantages and positive effects of the present invention are:
1, the present apparatus designs the mode of multiple roller synchronous operation conveying furnace bottom ash materials, and entire sizing equipment is designed as one
A volume is lesser independent whole and is all-sealed structure, and uses material dispersion material sieving technology, and conveying is reliable, and can be effective
Ground carries out thickness separation to material, solves the problems, such as that pulverized-coal fired boiler furnace bottom ash thickness separates, and has compact-sized, design
Ingenious, small in size, independent whole, all-sealed structure, occupancy boiler room space is small, and equipment manufacturing cost is low, convenient for installation and maintenance etc. huge
Big advantage.2, the present apparatus is also devised with into grey deflector in cabinet, controllable register, fine ash baffle, fine ash deflector, helps stream
All multi-parts such as device, ash-scraper and screw rod gate valve, can effectively improve the operational efficiency of furnace bottom ash material, and whole device operation is suitable
Freely, it operates conveniently, good practical effect, operating cost is low, especially adapts to the transformation to former boiler furnace bottom ash Ash Conveying System.
3, the present apparatus is in roller layout designs, it is ensured that furnace bottom ash material is intracorporal resident in case, to guarantee in boiler
Normal sealed pressure, ash disposal fluency is good when operation, adjustable controllable, overcome the technical problem of existing similar device completely,
It can fundamentally solve the problems, such as that boiler furnace bottom ash transportation system is not normally functioning, make the coal dust of high-efficiency environment friendly high degree of automation
Boiler system has more extensive development prospect.
Detailed description of the invention
Fig. 1 is structural front view of the invention；
Fig. 2 is the top view (broken section) of Fig. 1；
Fig. 3 is the left view of Fig. 1；
Fig. 4 is the A-A of Fig. 2 to cross-sectional view.
Specific embodiment
The invention will be further described with reference to the accompanying drawing and by specific embodiment, and following embodiment is descriptive
, it is not restrictive, this does not limit the scope of protection of the present invention.
A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device, including cabinet 1, multiple gray moving roller (the present embodiment
It is described by taking two gray moving rollers as an example, i.e. gray moving master roller 5, gray moving deputy roller cylinder 15, in actual motion, can also design more
A gray moving deputy roller cylinder), sifter 25, cabinet is cubic infundibulate, and the cement output tank that upper plane correspond to boiler, which designs, ash inlet,
Funnel-shaped bottom portion design has fine ash to export 13, and ash inlet is corresponded in cabinet and is equipped with a gray moving master roller, in gray moving master roller
Side-lower cabinet in a gray moving deputy roller cylinder is installed, gray moving master roller is run simultaneously with gray moving deputy roller cylinder by chain 4；Two
The driving motor of a roller is controlled using variable frequency adjustment PLC, and device external, Yi Mianshe should be arranged in the drive bearing of two rollers
Received shipment trip temperature impacts it；Coaxial uniformly distributed interval is set on the barrel outer surface of gray moving deputy roller cylinder and gray moving master roller
Gray moving plate 19 is set, to improve gray moving efficiency, is merely displayed in the present embodiment attached drawing on gray moving deputy roller cylinder and is formed with gray moving plate.In gray moving
A sifter is equipped with by hinged shaft 16 in cabinet below deputy roller cylinder, which tilts to side-lower, tilts in sifter
Design has a cinder to export 12 in cabinet above direction.
In order to avoid lime-ash is accidentally stuck on gray moving master roller or gray moving deputy roller cylinder, two rollers axially or radially
Design has side to check that operation door 18 or side check operation door 3 on cabinet.In order to avoid the adhesion of lime-ash pair roller barrel, in gray moving
An ash-cleaning device 26 is also equipped with by installation axle 14 on cabinet between deputy roller cylinder and gray moving master roller.
In order to ensure the pressure in boiler, the sealing in boiler is realized, the ash inlet position of plane is packaged on cabinet
The side middle part of one plate 6, the plate is fixed with a bulb 7, which is coaxially fixedly mounted with a screw rod 8, which is engaged on spiral shell
In set 9, a hand crank 10 is fixedly mounted in the screw rod end of the swivel nut other side.
In order to ensure the smooth outflow of furnace bottom ash, a flow-aid device is installed on the cabinet of lower section in the plate of ash inlet
21；For smooth export lime-ash, one is also devised at the ash inlet of flow-aid device side into grey deflector 22；In gray moving master roller
It being also devised with a fine ash deflector 24 on the cabinet of lower section, being sent to screening for passing through ash inlet into the lime-ash that grey deflector leaks down
On device.
In order to control dreg discharge amount, it is also devised with a controllable register 20 on the cabinet of gray moving deputy roller cylinder upper side position, it should
Controllable register is cut with scissors by hinged shaft and is filled, and is fixedly mounted with a crank 17 on the hinged shaft of side outside the enclosure, which is carried out by positioning disk 2
The adjustment of controllable register aperture to adjust its gap between roller, and then controls the size of dreg discharge amount, when there is bulk cinder
When rotation crank roll out it.
One fine ash baffle 23 is filled by the hinge of hinged shaft 11 in cinder exit, to limit fine ash outflow.
The structure types such as sieve, circle (band steel) steel, angular strip steel can be used in the screening mode of the sifter, sieve
Divide device the settable device for changing angle and vibration, to prevent the stuck sieve plate of lime-ash.
The present apparatus can choose different heat proof materials according to the temperature conditions of different furnace bottom ash, guarantee material adaptation use
Under the premise of temperature, its material cost is reduced；According to the size of boiler tonnage, foundation ash hole size and out ash quantity are settable
For different specifications, size, parameter.
The working principle of the invention is:
Pulverized-coal fired boiler furnace bottom ash is first conducted into this separating screen device before introducing Ash Conveying System, and furnace bottom ash into ash by leading
Flowing plate imports gray moving master roller top and is resident, and provides sealing for ash hole and ensures；The set adjusting gear above gray moving deputy roller cylinder
Plate, can be according to the aperture of its different coking degree (size) setting controllable register that burn of coal；Pass through the revolving speed tune of adjusting roller
Dreg discharge amount is saved, the furnace bottom ash containing certain granules degree is dispersed on sifter by the centrifugal action of roller, sifter
Sieve plate sieves furnace bottom ash, and the ash containing fine particle (general pneumatic conveying granular size should be in 6mm or less) is by going out
Grey mouth is imported into furnace bottom ash Ash Conveying System, and a small amount of bulky grain lime-ash for being sized out is sized out without furnace bottom ash
Ash Conveying System is exported by cinder and is discharged.Guarantee furnace bottom ash ash disposal delivery system by the fineness degree of fine ash baffle limitation ash
System can operate normally.
Claims (7)
1. a kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device, it is characterised in that: including cabinet, gray moving roller, screening
Device, planar design has ash inlet on cabinet, and bottom design has fine ash outlet, ash inlet is corresponded in cabinet and is successively pacified diagonally downward
Equipped with a gray moving master roller and multiple gray moving deputy roller cylinders, gray moving master roller and multiple gray moving deputy roller cylinders are run simultaneously；In gray moving master
A sifter is installed in cabinet below roller and gray moving deputy roller cylinder, which tilts to side-lower, tilts in sifter
A cinder is equipped in cabinet above direction to export.
2. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: on cabinet
The ash inlet position of plane is packaged with a plate, is fixed with a bulb in the middle part of a side of the plate, which is coaxially fixedly mounted with one
Screw rod, the screw rod are engaged in swivel nut, are fixedly mounted with a hand crank in the screw rod end of the swivel nut other side.
3. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: in ash inlet
Plate in lower section cabinet on a flow-aid device is installed, design has one into grey deflector at the ash inlet of flow-aid device side,
A fine ash deflector is also devised on the cabinet below gray moving master roller.
4. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: in gray moving pair
The cabinet of roller upper side position is equipped with a controllable register, and the controllable register is by hinged shaft hinge dress, and side outside the enclosure
A crank is fixedly mounted on hinged shaft, which the adjustment of baffle opening is adjusted by positioning disk.
5. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: in gray moving pair
It is coaxial on the barrel outer surface of roller and gray moving master roller to be uniformly arranged at intervals with gray moving plate.
6. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: go out in cinder
A fine ash baffle is filled by hinged shaft hinge at mouthful.
7. low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device according to claim 1, it is characterised in that: in dust roller
Design has side to check that operation door and/or side check operation door on the cabinet axially or radially of cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811758.1A CN108940849A (en) | 2018-07-23 | 2018-07-23 | A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811758.1A CN108940849A (en) | 2018-07-23 | 2018-07-23 | A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108940849A true CN108940849A (en) | 2018-12-07 |
Family
ID=64463500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810811758.1A Pending CN108940849A (en) | 2018-07-23 | 2018-07-23 | A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108940849A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB200332A (en) * | 1922-06-15 | 1923-07-12 | Wilfred Rothery Wood | Improvements relating to mechanical stokers |
| GB325964A (en) * | 1929-01-28 | 1930-03-06 | Edward Jay Franklin | Combination ash gate and air inlet system for furnaces |
| CN2570642Y (en) * | 2002-09-26 | 2003-09-03 | 吴炳久 | Suspension combustion layered coal supply machine for belt type coal stirring boiler |
| JP2006102669A (en) * | 2004-10-06 | 2006-04-20 | Takuma Co Ltd | Heat-treating apparatus of incineration ash |
| CN203223930U (en) * | 2013-04-09 | 2013-10-02 | 长乐力恒锦纶科技有限公司 | Layered coal hopper for fire grate |
| CN204665303U (en) * | 2015-05-26 | 2015-09-23 | 际华三五二二装具饰品有限公司 | A kind of scummer of novel biomass fuel boiler |
| CN104976613A (en) * | 2014-04-04 | 2015-10-14 | 车战斌 | Solid fuel combustion apparatus |
| CN205099013U (en) * | 2015-11-19 | 2016-03-23 | 中国神华能源股份有限公司 | Material separation device, scraper blade dragveyer and scraper conveyor |
| CN205403139U (en) * | 2016-03-14 | 2016-07-27 | 天津宝成机械制造股份有限公司 | Low nitrogen buggy boiler |
| CN106765226A (en) * | 2016-11-22 | 2017-05-31 | 无锡锡东能源科技有限公司 | A kind of water-cooling spiral ash hoist |
| TW201727155A (en) * | 2015-12-07 | 2017-08-01 | Kawasaki Heavy Ind Ltd | Ash discharge system |
| CN206459201U (en) * | 2016-12-08 | 2017-09-01 | 江苏大唐机械有限公司 | A kind of double push rod device of dragveyer |
| CN208912537U (en) * | 2018-07-23 | 2019-05-31 | 天津宝成机械制造股份有限公司 | A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device |
-
2018
- 2018-07-23 CN CN201810811758.1A patent/CN108940849A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB200332A (en) * | 1922-06-15 | 1923-07-12 | Wilfred Rothery Wood | Improvements relating to mechanical stokers |
| GB325964A (en) * | 1929-01-28 | 1930-03-06 | Edward Jay Franklin | Combination ash gate and air inlet system for furnaces |
| CN2570642Y (en) * | 2002-09-26 | 2003-09-03 | 吴炳久 | Suspension combustion layered coal supply machine for belt type coal stirring boiler |
| JP2006102669A (en) * | 2004-10-06 | 2006-04-20 | Takuma Co Ltd | Heat-treating apparatus of incineration ash |
| CN203223930U (en) * | 2013-04-09 | 2013-10-02 | 长乐力恒锦纶科技有限公司 | Layered coal hopper for fire grate |
| CN104976613A (en) * | 2014-04-04 | 2015-10-14 | 车战斌 | Solid fuel combustion apparatus |
| CN204665303U (en) * | 2015-05-26 | 2015-09-23 | 际华三五二二装具饰品有限公司 | A kind of scummer of novel biomass fuel boiler |
| CN205099013U (en) * | 2015-11-19 | 2016-03-23 | 中国神华能源股份有限公司 | Material separation device, scraper blade dragveyer and scraper conveyor |
| TW201727155A (en) * | 2015-12-07 | 2017-08-01 | Kawasaki Heavy Ind Ltd | Ash discharge system |
| CN205403139U (en) * | 2016-03-14 | 2016-07-27 | 天津宝成机械制造股份有限公司 | Low nitrogen buggy boiler |
| CN106765226A (en) * | 2016-11-22 | 2017-05-31 | 无锡锡东能源科技有限公司 | A kind of water-cooling spiral ash hoist |
| CN206459201U (en) * | 2016-12-08 | 2017-09-01 | 江苏大唐机械有限公司 | A kind of double push rod device of dragveyer |
| CN208912537U (en) * | 2018-07-23 | 2019-05-31 | 天津宝成机械制造股份有限公司 | A kind of low nitrogen pulverized-coal fired boiler furnace bottom ash pulley type separating screen device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20181207 |