CN107737507A - A kind of hot investment casting roasting kiln flue cleaning system - Google Patents
A kind of hot investment casting roasting kiln flue cleaning system Download PDFInfo
- Publication number
- CN107737507A CN107737507A CN201711264899.8A CN201711264899A CN107737507A CN 107737507 A CN107737507 A CN 107737507A CN 201711264899 A CN201711264899 A CN 201711264899A CN 107737507 A CN107737507 A CN 107737507A
- Authority
- CN
- China
- Prior art keywords
- smog
- dust
- electrostatic precipitator
- air
- stove
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 7
- 238000005495 investment casting Methods 0.000 title abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000006303 photolysis reaction Methods 0.000 claims abstract description 12
- 239000000779 smoke Substances 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims 2
- 239000007789 gas Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 13
- 230000005684 electric field Effects 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 238000004018 waxing Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000014860 sensory perception of taste Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- -1 sulphur hydrogen Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention discloses a kind of hot investment casting roasting kiln flue cleaning system, including stove, first band wax smog in stove is sent into cooling tower and cooled, then can filter out that particle in smog is big, heavy dust with sack cleaner, and can filters out relatively fine dust in smog.Drop-over further improves dust removing effects with water dust scrubber, certain water dust scrubber more importantly carries out cooling down again to smog, so need additional frozen water unit, so as to which the ratio of vapor in smog will be greatly reduced as follow-up electrostatic precipitator service, if vapor is excessive, electrostatic precipitator just can not normally play effect, so setting up for frozen water unit is highly desirable.Following electrostatic precipitator ionizes flue gas using high voltage electric field, and the dust charged in air-flow separates under electric field action with air-flow.Final step cracks foul gas with UV photodissociation air purifier.What may finally be trusted discharges to air.
Description
Technical field
The present invention relates to technical field of environment protection equipment, more specifically a kind of hot investment casting roasting kiln flue purification system
System.
Background technology
Wax removal kiln commercial sintered product application in than wide, but it the defects of it is obvious be exactly that environmental pollution is tight
Weight, is mainly derived from smog and arbitrarily discharges, thus national correlation department is put into effect《Industrial furnace atmosphere pollutants emission standardses》
（GB9078-1996）To limit this behavior of the enterprise without environmental consciousness.
But Ye You enterprises are very diligently, put forth effort on and solve the problems, such as that wax removal kiln smog emission is studied, wherein Hunan enterprise
Patent of invention CN201510124951.4 discloses a kind of de-waxing smoke treated stove, the de-waxing smoke treated stove include body of heater,
Flame component and the de-waxing chimney for discharging waste gas in wax removal kiln, the de-waxing chimney are provided with the first valve, and described first
The de-waxing chimney is separated to form the first exhaust section being connected with wax removal kiln and be expelled to gas outside wax removal kiln by valve
Two exhaust sections；The body of heater is provided with the first combustion chamber, the air inlet of first combustion chamber and the de-waxing chimney
First exhaust section connects, and the gas outlet of first combustion chamber connects with the second exhaust section of the de-waxing chimney；The stove
Body is provided with the first stomata entered for outdoor air in first combustion chamber；The bocca of the flame component is located at institute
State in the first combustion chamber.
The patent of invention technology is mainly designed to circulating combustion in the stove for wax, so as to reduce to idle discharge wax, reduces
The purpose of atmosphere pollution.It mainly solves the problems, such as that wax burning is insufficient in stove furnace air, solves the problems, such as to idle discharge wax,
But also containing substantial amounts of granule dust and pernicious gas etc. other discarded objects in the gas wherein discharged, without well
It is resolved.
The content of the invention
It is an object of the invention to overcome prior art disadvantages described above, there is provided a kind of discharge gas without sense of taste, without human body not
Suitable sense, innoxious safety dumping is realized, reduces atmosphere pollution, realizes that the hot investment casting roasting kiln flue of energy-conserving and environment-protective theory is net
Change system.
In order to reach object above, the present invention is achieved by the following technical solutions：A kind of hot investment casting roasting kiln
Flue cleaning system, including a stove, it is characterised in that the smoke exhaust pipe of the stove is connected with a cooling tower, the cooling tower
Reconnection has a sack cleaner, and the sack cleaner, which reconnects, a water dust scrubber, and the water dust scrubber reconnects
There is an electrostatic precipitator, the electrostatic precipitator, which reconnects, a UV photodissociation air purifiers, the UV photodissociation air purifier
Finally it is connected with a high-altitude chimney.
Preferably, the water dust scrubber side is also associated with a frozen water unit.
Band wax smog in stove is first sent into cooling tower by the present invention to be cooled, and cooling tower is that the heat exchange of blower fan dry type is cold
But mode.Then it can filter out that particle in smog is big, heavy dust with sack cleaner, and can is filtered out in smog
Relatively fine dust.Drop-over further improves dust removing effects with water dust scrubber, and certain water dust scrubber is more importantly to smog
Cooling down is carried out again, and general control is preferred at 20 DEG C or so, so additional frozen water unit is needed, so as to vapor in smog
Ratio will greatly reduce as follow-up electrostatic precipitator service, if vapor is excessive, electrostatic precipitator just can not normally be sent out
Effect is waved, so setting up for frozen water unit is highly desirable.Following electrostatic precipitator makes flue gas using high voltage electric field
Ionize, the dust charged in air-flow separates under electric field action with air-flow.Final step is cracked with UV photodissociation air purifier and disliked
Odour.What may finally be trusted discharges to air.
The component being related to below carries out explanation of nouns：Sack cleaner is a kind of dry type dust filtration device, and it is applied to catch
Collect tiny, dry, non-fiber dust, filter bag is using the filter cloth or nonwoven felt of weaving into utilizing the mistake of fabric
Filter effect is filtered to dusty gas, and after dusty gas enters sack cleaner, particle is big, heavy dust, due to
The effect of gravity settles down, and falls into ash bucket, and for the gas containing relatively fine dust when passing through filtrate, dust makes gas by detention
Body is purified.
Water dust scrubber is dusty gas by cylinder bottom along being introduced tangentially into, and rotation rises, grit by centrifugal action and
It is separated, throws to cylinder inboard wall, is adsorbed by the water film that cylinder inboard wall flows, flow to bottom cone with water, unloaded through dust-exhausting port
Go out.The formation of water film is along being tangentially sprayed onto wall by being arranged in the several nozzles in the top of cylinder, by water.So, in cylinder
Wall covers one layer and rotates the very thin water film to flow downward all the time, reaches the purpose for improving dust removing effects.
Electrostatic precipitator is to ionize flue gas using high voltage electric field, the dust charged in air-flow under electric field action with
Air-flow separates.
UV photodissociation air purifiers are disliked using special high energy high ozone UV ultraviolet beams irradiation foul gas, cracking
The device of odour.Crack foul gas such as:Ammonia, trimethylamine, hydrogen sulfide, first sulphur hydrogen, methyl mercaptan, methyl sulfide, methyl disulfide, two
Nitric sulfid and styrene, sulfide H2S, VOC class, the molecular link of benzene,toluene,xylene, make the pollutant point in free state
Son and ozone oxidation are combined into that small molecule is harmless or the compound of low evil, such as CO2, H2O.
Four chief components of frozen water unit：Compressor, evaporator, condenser and expansion valve, it is achieved thereby that unit
Cooling or heating effect.
Beneficial effect：Band wax smog in stove is first sent into cooling tower by the present invention to be cooled.Then removed with pocket type
Dirt device can filter out that particle in smog is big, heavy dust, and and can filters out relatively fine dust in smog.Drop-over water
Film dust-remover further improves dust removing effects, and certain water dust scrubber more importantly carries out cooling down again to smog, and one
As control and be preferred at 20 DEG C or so, so additional frozen water unit is needed, so as to which the ratio of vapor in smog will greatly reduce
For follow-up electrostatic precipitator service, if vapor is excessive, electrostatic precipitator just can not normally play effect, so frozen water machine
Setting up for group is highly desirable.Following electrostatic precipitator ionizes flue gas using high voltage electric field, the dust charge in air-flow
Electricity separates under electric field action with air-flow.Final step cracks foul gas with UV photodissociation air purifier.It may finally trust
Discharged to air.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1- stoves, 2- smoke exhaust pipes, 3- cooling towers, 4- sack cleaners, 5- water dust scrubbers, 6- frozen water units, 7-
Electrostatic precipitator, 8-UV photodissociation air purifiers, 9- high-altitudes chimney.
Embodiment
In order that technological means, creation characteristic and the reached purpose of the present invention are readily apparent from understanding, below in conjunction with specific reality
Apply example and the present invention is expanded on further.
Embodiment：As shown in figure 1, a kind of hot investment casting roasting kiln flue cleaning system, including a stove 1, stove 1
Smoke exhaust pipe 2 is connected with a cooling tower 3, and cooling tower 3, which reconnects, a sack cleaner 4, and sack cleaner 4, which reconnects, a moisture film
Deduster 5, the side of water dust scrubber 5 are also associated with a frozen water unit 6.Water dust scrubber 5, which reconnects, an electrostatic precipitator 7,
Electrostatic precipitator 7, which reconnects, a UV photodissociation air purifier 8, and UV photodissociation air purifier 8 is finally connected with a high-altitude chimney
9。
Use：Band wax smog in stove is first sent into cooling tower by the present invention to be cooled.Then sack cleaner is used
It can filter out that particle in smog is big, heavy dust, and can filters out relatively fine dust in smog.Drop-over is removed with moisture film
Dirt device further improves dust removing effects, and certain water dust scrubber more importantly carries out cooling down again to smog, general control
System is preferred at 20 DEG C or so, so additional frozen water unit is needed, so as to which the ratio of vapor in smog will be greatly reduced to be rear
Continuous electrostatic precipitator service, if vapor is excessive, electrostatic precipitator just can not normally play effect, so frozen water unit
Setting up is highly desirable.Following electrostatic precipitator ionizes flue gas using high voltage electric field, and the dust charged in air-flow exists
Separated under electric field action with air-flow.Final step cracks foul gas with UV photodissociation air purifier.May finally trust to
Air discharges.
Claims (2)
1. a kind of wax removal kiln system for cleaning fume, including a stove, it is characterised in that the smoke exhaust pipe of the stove is connected with
One cooling tower, the cooling tower, which reconnects, a sack cleaner, and the sack cleaner, which reconnects, a water dust scrubber, institute
Stating water dust scrubber and reconnecting has an electrostatic precipitator, and the electrostatic precipitator, which reconnects, a UV photodissociation air purifiers, institute
State UV photodissociation air purifier and be finally connected with a high-altitude chimney.
2. wax removal kiln system for cleaning fume according to claim 1, it is characterised in that the water dust scrubber side
It is also associated with a frozen water unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711264899.8A CN107737507A (en) | 2017-12-05 | 2017-12-05 | A kind of hot investment casting roasting kiln flue cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711264899.8A CN107737507A (en) | 2017-12-05 | 2017-12-05 | A kind of hot investment casting roasting kiln flue cleaning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107737507A true CN107737507A (en) | 2018-02-27 |
Family
ID=61238801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711264899.8A Pending CN107737507A (en) | 2017-12-05 | 2017-12-05 | A kind of hot investment casting roasting kiln flue cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107737507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479372A (en) * | 2018-04-23 | 2018-09-04 | 泰山学院 | A kind of denitration of boiler smoke dust-extraction unit and its application method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576342Y (en) * | 2002-09-27 | 2003-10-01 | 尤金 | Electrostatic black-smoke purifier for temple incinerator |
| CN101073733A (en) * | 2007-05-25 | 2007-11-21 | 曹湛斌 | Method for eliminating smoke during melting process of aluminum-alloy |
| CN202666636U (en) * | 2012-06-21 | 2013-01-16 | 洛阳钼业集团金属材料有限公司 | Smoke-gas treating system for ferromolybdenum smelting |
| CN205164386U (en) * | 2015-08-12 | 2016-04-20 | 江门市瑞蓝天宇环保设备科技有限公司 | Cremator tail -gas clean -up environmental protection processing system |
| CN107261788A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | The removal methods and device of a kind of high-temperature flue gas Zhong bioxin |
| CN207899175U (en) * | 2017-12-05 | 2018-09-25 | 诸暨市裘健机械厂 | A kind of hot investment casting roasting kiln flue purification system |
-
2017
- 2017-12-05 CN CN201711264899.8A patent/CN107737507A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576342Y (en) * | 2002-09-27 | 2003-10-01 | 尤金 | Electrostatic black-smoke purifier for temple incinerator |
| CN101073733A (en) * | 2007-05-25 | 2007-11-21 | 曹湛斌 | Method for eliminating smoke during melting process of aluminum-alloy |
| CN202666636U (en) * | 2012-06-21 | 2013-01-16 | 洛阳钼业集团金属材料有限公司 | Smoke-gas treating system for ferromolybdenum smelting |
| CN205164386U (en) * | 2015-08-12 | 2016-04-20 | 江门市瑞蓝天宇环保设备科技有限公司 | Cremator tail -gas clean -up environmental protection processing system |
| CN107261788A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | The removal methods and device of a kind of high-temperature flue gas Zhong bioxin |
| CN207899175U (en) * | 2017-12-05 | 2018-09-25 | 诸暨市裘健机械厂 | A kind of hot investment casting roasting kiln flue purification system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479372A (en) * | 2018-04-23 | 2018-09-04 | 泰山学院 | A kind of denitration of boiler smoke dust-extraction unit and its application method |
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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 |
Application publication date: 20180227 |
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| RJ01 | Rejection of invention patent application after publication |