CN109529239B - Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure - Google Patents
Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure Download PDFInfo
- Publication number
- CN109529239B CN109529239B CN201811261255.8A CN201811261255A CN109529239B CN 109529239 B CN109529239 B CN 109529239B CN 201811261255 A CN201811261255 A CN 201811261255A CN 109529239 B CN109529239 B CN 109529239B
- Authority
- CN
- China
- Prior art keywords
- storage bin
- pulverized coal
- fire
- arrangement structure
- extinguishing agent
- 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.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 title abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 21
- 239000002817 coal dust Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 2
- 229920000053 polysorbate 80 Polymers 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- MQKXWEJVDDRQKK-UHFFFAOYSA-N bis(6-methylheptyl) butanedioate Chemical compound CC(C)CCCCCOC(=O)CCC(=O)OCCCCCC(C)C MQKXWEJVDDRQKK-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JMGZBMRVDHKMKB-UHFFFAOYSA-L disodium;2-sulfobutanedioate Chemical compound [Na+].[Na+].OS(=O)(=O)C(C([O-])=O)CC([O-])=O JMGZBMRVDHKMKB-UHFFFAOYSA-L 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/002—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/04—Fire prevention, containment or extinguishing specially adapted for particular objects or places for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Operations Research (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Fire-Extinguishing Compositions (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention provides an arrangement structure for fire extinguishment of a pulverized coal storage bin and a fire extinguishing agent matched with the arrangement structure, wherein a spray head is arranged in the storage bin and is positioned at the bottom of a pulverized coal stack; the distance between two adjacent spray heads is L1, and the distance between the edge spray heads and the wall surface of the storage bin is L2; and specific conditions need to be satisfied between L1 and L2. The invention can achieve the purposes of extinguishing deep fire and protecting the safety of the coal dust storage bin.
Description
Technical Field
The invention belongs to the technical field of fire extinguishment of pulverized coal storage bins, and particularly relates to an arrangement structure for fire extinguishment of a pulverized coal storage bin and a fire extinguishing agent matched with the arrangement structure.
Background
The use of coal in the energy structures of China still occupies an important part, and particularly, the coal is used more frequently in thermal power stations. In order to improve the combustion efficiency of the pulverized coal, the pulverized coal is usually combusted in a pulverized coal form, the pulverized coal is generally stored in a pulverized coal bin, the pulverized coal can be decomposed and oxidized to release heat, the heat conduction efficiency of a pulverized coal pile is low, the heat is easy to accumulate, the spontaneous combustion of the pulverized coal can be initiated after the temperature reaches a certain degree, and finally, a deep fire disaster is formed. For deep fire of coal dust, the existing extinguishing agent and extinguishing mode can not be used for extinguishing fire, and the main reason is that the coal dust has strong hydrophobicity, and the extinguishing agent such as water, foam and the like can not penetrate into the interior to achieve the aim of extinguishing fire; and even if the upper part is covered with the fire extinguishing agent to isolate air, gaps exist among the pulverized coal particles, the pulverized coal can still continue to burn, and the aim of extinguishing fire can not be achieved.
At present, no good fire extinguishing mode for solving the deep fire disaster of the pulverized coal exists in China, on one hand, no proper fire extinguishing agent exists, on the other hand, no proper fire extinguishing agent application mode exists, a proper fire extinguishing agent and an application method thereof need to be found, and a calculation method of the arrangement mode of the application method in a pulverized coal storage bin is provided.
Disclosure of Invention
In view of the above, the invention aims to provide an arrangement structure for fire extinguishment of a pulverized coal storage bin and a fire extinguishing agent matched with the arrangement structure for fire extinguishment so as to achieve good fire extinguishment effect and solve the defects in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
an arrangement structure for fire extinguishment of a pulverized coal storage bin is provided with a spray head in the storage bin, and the spray head is positioned at the bottom of a pulverized coal stack; the distance between two adjacent spray heads is L1, and the distance between the edge spray heads and the wall surface of the storage bin is L2; and the following conditions are satisfied between L1 and L2:
L1≤2×L2 (1)
ρ 1 is the density of coal powder, kg/m 3 ；
ρ 2 Density of lump coal, kg/m 3 ；
D 1 The particle size of the pulverized coal particles is m;
D 2 the diameter of the nozzle pipeline is m;
t is the required permeation time, s;
p is the pressure of a nozzle pipeline and Pa;
and is also provided with
38.5×10 -6 ＜D 1 ＜61×10 -6
0.003＜D 2 ＜0.01
30＜t＜300
5×10 4 ＜P＜3×10 5 。
The invention also provides a fire extinguishing agent matched with the arrangement structure for extinguishing fire of the pulverized coal storage bin, which comprises the following components in percentage by mass,
the sum of the mass fractions of the components is 100 percent.
Preferably, the composition comprises the following components by mass percent, namely 0.2 percent of Tween-80, 0.1 percent of tetra sodium ethylenediamine tetraacetate, 0.05 percent of diisooctyl succinate sodium sulfonate and 0.1 percent of potassium carbonate solution; the balance being water; the sum of the mass fractions of the components is 100 percent.
Compared with the prior art, the arrangement structure for extinguishing fire of the pulverized coal storage bin and the fire extinguishing agent matched with the arrangement structure have the following advantages:
the invention solves the problem that the fire in the coal powder bin cannot be extinguished by using the traditional extinguishing agent and the extinguishing mode, designs a method for spraying the extinguishing agent from the bottom, and according to a specific extinguishing agent, proposes a formula of a spray head design in the device, and can complete the design of the device according to the formula, thereby achieving the purposes of extinguishing the fire in the deep position and protecting the safety in the coal powder storage bin.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of a simple structure of a storage bin according to an embodiment of the invention;
FIG. 2 is a schematic view of the bottom of a storage bin according to an embodiment of the invention;
reference numerals illustrate:
1-a storage bin; 2-a spray head; 3-a humidity sensor; 4. a water pipe.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
An arrangement structure for fire extinguishment of a pulverized coal storage bin is provided with a spray head in the storage bin, and the spray head is positioned at the bottom of a pulverized coal stack; the distance between two adjacent spray heads is L1, and the distance between the edge spray heads and the wall surface of the storage bin is L2; and the following conditions are satisfied between L1 and L2:
L1≤2×L2 (1)
ρ 1 is the density of coal powder, kg/m 3 ；
ρ 2 Density of lump coal, kg/m 3 ；
D 1 The particle size of the pulverized coal particles is m;
D 2 the diameter of the nozzle pipeline is m;
t is the required permeation time, s;
p is the pressure of a nozzle pipeline and Pa;
the invention also provides a fire extinguishing agent matched with the arrangement structure for fire extinguishment of the pulverized coal storage bin, which comprises the following components in percentage by mass, 0.2% of Tween-80, 0.1% of tetra sodium ethylenediamine tetraacetate, 0.05% of diisooctyl sodium sulfosuccinate and 0.1% of potassium carbonate solution; the balance being water; the sum of the mass fractions of the components is 100 percent.
The size of the pulverized coal storage bin is 4m 2m 1m, the stored pulverized coal is 300 meshes, the particle size of the pulverized coal is about 48 mu m, and the density of the pulverized coal is 500kg/m 3 The density of the coal briquette is 900kg/m 3 The diameter of the pipeline of the internal fire extinguishing agent spray nozzle is 6mm, the following table can be calculated by using the formula (1) and the formula (2), and the specific positions of the spray nozzles in the pulverized coal storage bin can be arranged according to the distances in the table.
Comparative example
The fire extinguishing facilities in the conventional pulverized coal storage bin can be divided into three types, the first type is that water is used as a fire extinguishing agent, spray heads are arranged at the center of the top of the pulverized coal storage bin, the spray heads are heated and opened after water spraying is performed once a fire disaster occurs, water permeates from the upper part, experimental findings are carried out (the same experimental conditions are adopted, the fire extinguishing agent is only water), and the fire extinguishing effect can not be achieved even if the fire extinguishing agent is only permeated for 20cm after 10 hours. The other two are foam and carbon dioxide respectively, and the penetration capacity of the foam and the carbon dioxide is far lower than that of water, so that the conventional fire extinguishing facility and the fire extinguishing agent can not achieve the aim of extinguishing the fire in the deep position of the coal dust bin.
Experimental effect
The method comprises the steps of setting a coal powder storage bin with the size of 5 x 4m, placing coal powder (300 meshes) in the coal powder storage bin, setting a spray head from the bottom of a coal powder stack, adopting the parameters in the embodiment in the experiment, and detecting the humidity of the coal powder by using a coal powder humidity sensor to obtain the actual permeation time, wherein the experimental result is shown in the following table.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (2)
1. An arrangement structure for fire extinguishment of a pulverized coal storage bin is characterized in that: a spray head is arranged in the storage bin and is positioned at the bottom of the pulverized coal stack; the distance between two adjacent spray heads is L1, and the distance between the edge spray heads and the wall surface of the storage bin is L2; and the following conditions are satisfied between L1 and L2:
L1≤2×L2 (1)
wherein ρ is 1 Is the density of coal powder, kg/m 3 ；
ρ 2 Density of lump coal, kg/m 3 ；
D 1 The particle size of the pulverized coal particles is m;
D 2 the diameter of the nozzle pipeline is m;
t is the required permeation time, s;
p is the pressure of a nozzle pipeline and Pa;
and is also provided with
38.5×10 -6 <D 1 <61×10 -6
0.003<D 2 <0.01
30<t<300
5×10 4 <P<3×10 5 。
2. Use of the arrangement according to claim 1 for extinguishing a deep fire in a coal dust bin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811261255.8A CN109529239B (en) | 2018-10-26 | 2018-10-26 | Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure |
| CN202311132214.XA CN117159971A (en) | 2018-10-26 | 2018-10-26 | Fire extinguishing agent for fire extinguishment of pulverized coal storage bin and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811261255.8A CN109529239B (en) | 2018-10-26 | 2018-10-26 | Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311132214.XA Division CN117159971A (en) | 2018-10-26 | 2018-10-26 | Fire extinguishing agent for fire extinguishment of pulverized coal storage bin and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109529239A CN109529239A (en) | 2019-03-29 |
| CN109529239B true CN109529239B (en) | 2023-09-22 |
Family
ID=65845358
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311132214.XA Pending CN117159971A (en) | 2018-10-26 | 2018-10-26 | Fire extinguishing agent for fire extinguishment of pulverized coal storage bin and application thereof |
| CN201811261255.8A Active CN109529239B (en) | 2018-10-26 | 2018-10-26 | Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311132214.XA Pending CN117159971A (en) | 2018-10-26 | 2018-10-26 | Fire extinguishing agent for fire extinguishment of pulverized coal storage bin and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN117159971A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519789A (en) * | 1938-10-01 | 1940-04-05 | Cardox Corp | Improvements in fire extinguishing apparatus employing liquid carbon dioxide as a fire extinguishing medium |
| JPH08750A (en) * | 1994-06-24 | 1996-01-09 | Ishikawajima Harima Heavy Ind Co Ltd | Fire preventing device for coal bunker |
| WO2005035698A1 (en) * | 2003-10-15 | 2005-04-21 | S.S.P. B.V. | Method for treating coal piles, apparatus for applying said method and assembly of apparatus and a coal pile |
| CN202289283U (en) * | 2011-09-20 | 2012-07-04 | 河南省电力勘测设计院 | Automatic fire-proofing and fire-extinguishing plant for coal bunker |
| CN103432698A (en) * | 2013-06-29 | 2013-12-11 | 曲阜中联水泥有限公司 | Apparatus for preventing coal powder bin bottom from firing |
| CN104888392A (en) * | 2015-06-18 | 2015-09-09 | 福建新偌环境科技有限公司 | Extinguishing system for performing blind-spot-free dry powder spraying on large storage tank |
| CN107737431A (en) * | 2017-09-19 | 2018-02-27 | 天津大学 | It is a kind of to be used to putting out coal dust and glow the water based fire suppressant and preparation method of deepseated fire calamity |
| CN108498998A (en) * | 2018-03-30 | 2018-09-07 | 中煤科工集团重庆研究院有限公司 | Coal mine composite fire extinguishing material and preparation method thereof |
| CN209187979U (en) * | 2018-10-26 | 2019-08-02 | 公安部天津消防研究所 | A kind of arragement construction for the fire extinguishing of coal dust storage warehouse |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20075762L (en) * | 2007-10-29 | 2009-04-30 | Marioff Corp Oy | Fire fighting procedure and equipment |
-
2018
- 2018-10-26 CN CN202311132214.XA patent/CN117159971A/en active Pending
- 2018-10-26 CN CN201811261255.8A patent/CN109529239B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519789A (en) * | 1938-10-01 | 1940-04-05 | Cardox Corp | Improvements in fire extinguishing apparatus employing liquid carbon dioxide as a fire extinguishing medium |
| JPH08750A (en) * | 1994-06-24 | 1996-01-09 | Ishikawajima Harima Heavy Ind Co Ltd | Fire preventing device for coal bunker |
| WO2005035698A1 (en) * | 2003-10-15 | 2005-04-21 | S.S.P. B.V. | Method for treating coal piles, apparatus for applying said method and assembly of apparatus and a coal pile |
| CN202289283U (en) * | 2011-09-20 | 2012-07-04 | 河南省电力勘测设计院 | Automatic fire-proofing and fire-extinguishing plant for coal bunker |
| CN103432698A (en) * | 2013-06-29 | 2013-12-11 | 曲阜中联水泥有限公司 | Apparatus for preventing coal powder bin bottom from firing |
| CN104888392A (en) * | 2015-06-18 | 2015-09-09 | 福建新偌环境科技有限公司 | Extinguishing system for performing blind-spot-free dry powder spraying on large storage tank |
| CN107737431A (en) * | 2017-09-19 | 2018-02-27 | 天津大学 | It is a kind of to be used to putting out coal dust and glow the water based fire suppressant and preparation method of deepseated fire calamity |
| CN108498998A (en) * | 2018-03-30 | 2018-09-07 | 中煤科工集团重庆研究院有限公司 | Coal mine composite fire extinguishing material and preparation method thereof |
| CN209187979U (en) * | 2018-10-26 | 2019-08-02 | 公安部天津消防研究所 | A kind of arragement construction for the fire extinguishing of coal dust storage warehouse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117159971A (en) | 2023-12-05 |
| CN109529239A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10335625B2 (en) | Phosphate fire-extinguishing composition | |
| CN105419903B (en) | It is a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application | |
| CN102341650B (en) | Method for reducing nitrogen oxide emissions in oxyfuel combustion | |
| CN104807002B (en) | A kind of CFBB oxygen-enriched combusting dry method desulfuration system and method | |
| CN1959208A (en) | Boiler system of circulating fluid bed burning in oxygen enrichment | |
| CN103182609A (en) | Combustion jet cutter used for steel structure member cutting | |
| US20130175060A1 (en) | New method for extinguishing fire | |
| CN109529239B (en) | Arrangement structure for fire extinguishment of pulverized coal storage bin and fire extinguishing agent matched with arrangement structure | |
| CN107013902A (en) | Lignite couples boiler combustion system with biomass | |
| CN200975664Y (en) | Oxygen-enriched combustion circulating fluid bed boiler system | |
| JP2013104637A (en) | Pulverized fuel supply method for oxygen combustion boiler, and oxygen combustion boiler system | |
| CN204554798U (en) | A kind of CFBB oxygen-enriched combusting dry method desulfuration system | |
| CN204073202U (en) | A kind of self-extinguishing bullet | |
| CN209187979U (en) | A kind of arragement construction for the fire extinguishing of coal dust storage warehouse | |
| CN107537128A (en) | A kind of hot aerosol type fire-extinguishing composite and preparation method thereof | |
| CN107238075A (en) | A kind of coal burning boiler of power station mixed coal combustion method | |
| CN106621162A (en) | Cold air sol fire extinguishing agent | |
| CN109404891A (en) | Gasified combustion apparatus | |
| CN205155934U (en) | Biomass gasification direct combustion combustor | |
| CN204962724U (en) | Energy -saving burner | |
| CN209196834U (en) | Gasified combustion apparatus | |
| CN204568522U (en) | Storehouse top stable equilibrium device | |
| CN204063016U (en) | A kind of electrostatic field takes off the fluidized system that sodium prevents boiler heating surface from staiing | |
| CN103131513A (en) | Thermal power plant fire coal combustion supporting and sulfur fixation composition method | |
| CN103131519A (en) | Boiler fire coal sulfur fixation composition method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 300381 No. 110 South Jin Wei Road, Tianjin, Nankai District Applicant after: TIANJIN FIRE Research Institute OF MEM Address before: 300381 No. 110 South Jin Wei Road, Tianjin, Nankai District Applicant before: TIANJIN FIRE Research Institute |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |