CN107965676A - A kind of processing system for liquefied ammonia leakage - Google Patents
A kind of processing system for liquefied ammonia leakage Download PDFInfo
- Publication number
- CN107965676A CN107965676A CN201711059977.0A CN201711059977A CN107965676A CN 107965676 A CN107965676 A CN 107965676A CN 201711059977 A CN201711059977 A CN 201711059977A CN 107965676 A CN107965676 A CN 107965676A
- Authority
- CN
- China
- Prior art keywords
- cover body
- sleeve
- liquefied ammonia
- ammonia
- processing system
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- 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
- B01D53/14—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 absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of processing system for liquefied ammonia leakage, including liquid ammonia storage tank, the liquid ammonia storage tank outer cup is equipped with protective cover, protective cover is internally provided with liquefied ammonia leak sensor, protective cover inner top is fixedly connected with getter device, getter device is connected by the first pipeline with the absorption plant positioned at the liquid ammonia storage tank external world, and first is disposed with air-introduced machine on pipeline, the absorption plant includes housing, the interior bottom of housing is equipped with the first cover body, first cover body is in upside down funnel shape, and the first cover body upper end is equipped with first through hole.The beneficial effects of the invention are as follows：First, liquefied ammonia leak sensor, which can detect, liquefied ammonia in protective cover, then liquefied ammonia leak sensor can send a signal to control system, control system control air-introduced machine work, the ammonia of protective cover inner top is absorbed in getter device by the air-suction cover being evenly arranged, to ensure that the ammonia of leakage can effectively be absorbed, danger is reduced.
Description
Technical field
The present invention relates to pernicious gas to reveal processing technology field, and in particular to a kind of processing system for liquefied ammonia leakage
System.
Background technology
When producing composite fertilizer using sour method, liquefied ammonia can be used.Liquefied ammonia in storage and use exist leakage danger, one
Denier leaks, and not only has economic loss, but also can threaten personal safety, causes safety and environmentally friendly accident.Therefore, it is necessary to liquid
Ammonia storage device carry out security alarm control, the prior art generally using liquefied ammonia store in-site installation ammonia leakage alarm and
The method of spray system, ammonia leakage detector can send alarm signal after detecting ammonia leakage, and field personnel receives
To after alarm signal, start spray system water spray, leakage ammonia is subjected to dissolution process.But the liquefied ammonia of the prior art is revealed
Alert process device has the disadvantage that:First, need field personnel's remote control to be sprayed after ammonia leakage, low-response,
Processing is not in time.Second, the nozzle of the spray equipment of the spray system of the prior art is arranged on the position near above liquefied ammonia holding vessel
Put, since ammonia proportion is less than ammonia, apparatus above cannot effectively be handled the ammonia drifted to top, some are existing
Technology uses the method for installing ventilating fan additional in the room of liquefied ammonia storage, but ammonia is only discharged to by this method out of locker room
Outdoor, does not solve the problems, such as that ammonia is handled fundamentally.
The content of the invention
It is an object of the invention to provide a kind of processing system for liquefied ammonia leakage, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the present invention provides following technical solution：
A kind of processing system for liquefied ammonia leakage, including liquid ammonia storage tank, the liquid ammonia storage tank outer cup are equipped with protective cover, protect
Cover is internally provided with liquefied ammonia leak sensor, and protective cover inner top is fixedly connected with getter device, and getter device passes through the first pipe
Road is connected with the absorption plant positioned at the liquid ammonia storage tank external world, and air-introduced machine is disposed with the first pipeline, the absorption plant bag
Housing is included, the interior bottom of housing is equipped with the first cover body, and the first cover body is in upside down funnel shape, and it is logical that the first cover body upper end is equipped with first
Hole, is equipped with the second cover body above the first cover body, and the second cover body is in the shape of the letter V, and if the contact position of the second cover body and housing offer
Dry second through hole, is equipped with the first sleeve, second sleeve and 3rd sleeve between the first cover body and the second cover body；Second cover body
Top is disposed with sparge pipe, several nozzles is evenly arranged with the downside of sparge pipe, sparge pipe is by second pipe and is located at housing
The pump housing of interior bottom is connected.
It is as further scheme of the invention：The getter device includes outer endless tube, interior endless tube and some connecting tubes, outside
Endless tube is connected with interior endless tube by some connecting tubes, and some openings have been evenly arranged on the downside of outer endless tube, interior endless tube and connecting tube
The air-suction cover set downward.
As the present invention, further scheme is：The enclosure interior fills absorption water.
As the present invention, further scheme is：The first sleeve top is fixedly connected with the second cover body, and first
Gap is left between sleeve lower end and the first cover body；The second sleeve is located at the first cartridge exterior, second sleeve lower end with
First cover body is fixedly connected, and gap is left between second sleeve upper end and the second cover body；The 3rd sleeve is located at second set
Cylinder is exterior, and 3rd sleeve top is fixedly connected with the second cover body, and gap is left between 3rd sleeve lower end and the first cover body.
As the present invention, further scheme is：The case top is equipped with air outlet pipe.
As the present invention, further scheme is：The liquid ammonia storage tank is connected by air inlet pipe with extraneous liquefied ammonia source
It is logical, and solenoid valve is disposed with air inlet pipe.
As the present invention, further scheme is：Liquefied ammonia leak sensor, solenoid valve, air-introduced machine and the pump housing with
Control system is connected.
The beneficial effects of the invention are as follows：
First, liquefied ammonia leak sensor, which can detect, liquefied ammonia in protective cover, then liquefied ammonia leak sensor can be sent a signal to
Control system, control system control air-introduced machine work, the ammonia of protective cover inner top is absorbed by the air-suction cover being evenly arranged
Into getter device, to ensure that the ammonia of leakage can effectively be absorbed, danger is reduced；
Second, ammonia slowly rises to be entered in the first sleeve at first through hole again, is then escaped into second sleeve, immediately
And escape into 3rd sleeve, finally escape and rise from the second through hole, the setting of three sleeves causes ammonia with adsorbing water
Contact path greatly prolongs, and effectively increases the adsorption effect to ammonia；
3rd, after ammonia continues rising, start the pump housing, the absorption water of bottom in housing is pumped into spray by the pump housing by second pipe
In liquid pipe, then sprayed at nozzle, the adsorption treatment continued to the ammonia of rising, the thorough suction of ammonia has been effectively ensured
It is attached.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of getter device of the present invention；
Fig. 3 is the structure diagram of absorption plant of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1-Fig. 3, in the embodiment of the present invention, a kind of processing system for liquefied ammonia leakage, including liquid ammonia storage tank
1,1 outer cup of liquid ammonia storage tank is equipped with protective cover 2, and protective cover 2 is internally provided with liquefied ammonia leak sensor 3, is pushed up in protective cover 2
Portion is fixedly connected with getter device 4, and getter device 4 passes through the first pipeline 6 and 8 phase of absorption plant positioned at the external world of liquid ammonia storage tank 1
Connection, and air-introduced machine 7 is disposed with the first pipeline 6, if the getter device 4 includes outer endless tube 401, interior endless tube 402 and involvement
Adapter 403, outer endless tube 401 and interior endless tube 402 are connected by some connecting tubes 403, outer endless tube 401, interior endless tube 402 and connection
The downside of pipe 403 is evenly arranged the air-suction cover 5 of some opening down settings, and when liquefied ammonia leak case occurs, liquefied ammonia leakage passes
Sensor 3, which can detect, liquefied ammonia in protective cover 2, then liquefied ammonia leak sensor 3 can send a signal to control system, control system
Control air-introduced machine 7 works, and the ammonia of 2 inner top of protective cover is absorbed in absorption plant 8 by the air-suction cover 5 being evenly arranged,
To ensure that the ammonia of leakage can effectively be absorbed, danger is reduced.
The absorption plant 8 includes housing 801, and the interior bottom of housing 8 is equipped with the first cover body 802, and the first cover body 802 is in
Put funnel-form, 802 upper end of the first cover body is equipped with first through hole 803, and the top of the first cover body 802 is equipped with the second cover body 8013, and second
Cover body 8013 is in the shape of the letter V, and the contact position of the second cover body 8013 and housing 801 offers some second through holes 807, the first cover body
802 and second are equipped with the first sleeve 804, second sleeve 805 and 3rd sleeve 806 between cover body 8013；Second cover body
8013 tops are disposed with sparge pipe 8010, and the downside of sparge pipe 8010 is evenly arranged with several nozzles 8011, and sparge pipe 8010 is logical
Cross second pipe 809 with the pump housing 808 positioned at bottom in housing 1 to be connected, the ammonia of leakage is incorporated into inside housing 1, ammonia
Gas slowly rises to be entered in the first sleeve 807 at first through hole 803 again, is then escaped into second sleeve 805, and then
Escape into 3rd sleeve 806, finally escape and rise at the second through hole 807, the setting of three sleeves causes ammonia and absorption
The contact path of water greatly prolongs, and effectively increases the adsorption effect to ammonia；After ammonia continues rising, start the pump housing 808, pump
The absorption water of bottom in housing 801 is pumped into sparge pipe 8010 by body 808 by second pipe 809, then from nozzle 8011
Place sprays, the adsorption treatment continued to the ammonia of rising, and the thorough absorption of ammonia has been effectively ensured.
Absorption water is filled inside the housing 1.
First sleeve, 804 top is fixedly connected with the second cover body 8013, and 804 lower end of the first sleeve and the first cover body
Gap is left between 802；The second sleeve 805 is located at outside the first sleeve 804,804 lower end of second sleeve and the first cover
Body 802 is fixedly connected, and gap is left between 805 upper end of second sleeve and the second cover body 8013；The 3rd sleeve 806 is located at
Outside second sleeve 805,806 top of 3rd sleeve is fixedly connected with the second cover body 8013,806 ends and the first cover under 3rd sleeve
Gap is left between body 802.
The top of housing 801 is equipped with air outlet pipe 8012.
The liquid ammonia storage tank 1 is connected by air inlet pipe 9 with extraneous liquefied ammonia source, and is disposed with solenoid valve in air inlet pipe 9
10。
The liquefied ammonia leak sensor 3, solenoid valve 10, air-introduced machine 7 and the pump housing 808 are connected with control system, work as liquid
When ammonia leaks, control system, which closes solenoid valve 10, prevents the liquefied ammonia in liquefied ammonia source from continuing to be fed into liquid ammonia storage tank 1.
The present invention the course of work be：When liquefied ammonia leak case occurs, liquefied ammonia leak sensor 3 can detect protective cover
There is liquefied ammonia in 2, then liquefied ammonia leak sensor 3 can send a signal to control system, and control system control air-introduced machine 7 works, will
The ammonia of 2 inner top of protective cover is absorbed in absorption plant 8 by the air-suction cover 5 being evenly arranged, to ensure the ammonia energy of leakage
It is enough effectively to be absorbed, reduce danger；The ammonia of leakage is incorporated into inside housing 1, ammonia slowly rises again from
Entered at one through hole 803 in first sleeve 807, then escape into second sleeve 805, and then escape into 3rd sleeve
In 806, finally escape and rise at the second through hole 807, the setting of three sleeves is so that ammonia and the contact path for adsorbing water are big
It is big to extend, effectively increase the adsorption effect to ammonia；After ammonia continues rising, start the pump housing 808, the pump housing 808 is by housing 801
The absorption water of interior bottom is pumped into sparge pipe 8010 by second pipe 809, is then sprayed at nozzle 8011, to rising
The adsorption treatment that ammonia is continued, has been effectively ensured the thorough absorption of ammonia；When liquefied ammonia leaks, control system makes electricity
Magnet valve 10, which is closed, prevents the liquefied ammonia in liquefied ammonia source from continuing to be fed into liquid ammonia storage tank 1.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
1. a kind of processing system for liquefied ammonia leakage, including liquid ammonia storage tank, it is characterised in that be provide with outside the liquid ammonia storage tank
There is protective cover, protective cover is internally provided with liquefied ammonia leak sensor, and protective cover inner top is fixedly connected with getter device, air-breathing dress
Put and be connected by the first pipeline with the absorption plant positioned at the liquid ammonia storage tank external world, and air-introduced machine is disposed with the first pipeline, institute
Stating absorption plant includes housing, and the interior bottom of housing is equipped with the first cover body, and the first cover body is in upside down funnel shape, the first cover body upper end
Equipped with first through hole, the second cover body is equipped with above the first cover body, the second cover body is in the shape of the letter V, and contact of second cover body with housing
Place offers some second through holes, and the first sleeve, second sleeve and 3rd sleeve are equipped between the first cover body and the second cover body；Institute
State and sparge pipe is disposed with above the second cover body, be evenly arranged with several nozzles on the downside of sparge pipe, sparge pipe passes through second pipe
With in housing the pump housing of bottom be connected.
A kind of 2. processing system for liquefied ammonia leakage according to claim 1, it is characterised in that the getter device bag
Outer endless tube, interior endless tube and some connecting tubes are included, outer endless tube is connected with interior endless tube by some connecting tubes, outer endless tube, interior endless tube
With the air-suction cover that some opening down settings are evenly arranged on the downside of connecting tube.
3. a kind of processing system for liquefied ammonia leakage according to claim 1, it is characterised in that the enclosure interior is contained
There is absorption water.
A kind of 4. processing system for liquefied ammonia leakage according to claim 1 or 3, it is characterised in that the first set
Cylinder top is fixedly connected with the second cover body, and leaves gap between the first sleeve lower end and the first cover body；The second sleeve cover
The first cartridge exterior is located at, second sleeve lower end is fixedly connected with the first cover body, is stayed between second sleeve upper end and the second cover body
There is gap；The 3rd sleeve is located at outside second sleeve, and 3rd sleeve top is fixedly connected with the second cover body, 3rd sleeve
Gap is left between lower end and the first cover body.
5. a kind of processing system for liquefied ammonia leakage according to claim 1, it is characterised in that the case top is set
There is air outlet pipe.
6. a kind of processing system for liquefied ammonia leakage according to claim 6, it is characterised in that the liquid ammonia storage tank leads to
Cross air inlet pipe with extraneous liquefied ammonia source to be connected, and solenoid valve is disposed with air inlet pipe.
7. a kind of processing system for liquefied ammonia leakage according to claim 1, it is characterised in that the liquefied ammonia leakage passes
Sensor, solenoid valve, air-introduced machine and the pump housing are connected with control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711059977.0A CN107965676B (en) | 2017-11-01 | 2017-11-01 | A kind of processing system for liquefied ammonia leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711059977.0A CN107965676B (en) | 2017-11-01 | 2017-11-01 | A kind of processing system for liquefied ammonia leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107965676A true CN107965676A (en) | 2018-04-27 |
| CN107965676B CN107965676B (en) | 2019-04-30 |
Family
ID=62000860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711059977.0A Active CN107965676B (en) | 2017-11-01 | 2017-11-01 | A kind of processing system for liquefied ammonia leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107965676B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174100A (en) * | 2019-12-30 | 2020-05-19 | 清华大学 | Hydrogen leakage safety protection device |
| CN114110432A (en) * | 2021-11-15 | 2022-03-01 | 濮阳泓天威药业有限公司 | Liquid ammonia leakage pipeline control device |
| WO2023103719A1 (en) * | 2021-12-09 | 2023-06-15 | 深圳能源环保股份有限公司 | Ammonia water storage system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110112133A (en) * | 2010-04-06 | 2011-10-12 | Kc코트렐 주식회사 | Absorption tower having multi-absorption chamber |
| CN202327650U (en) * | 2011-11-23 | 2012-07-11 | 四川立泰电子有限公司 | Emergency spray device for liquid ammonia leakage |
| WO2014197005A1 (en) * | 2013-06-04 | 2014-12-11 | Southern Company | Systems and methods for sequestering co2 |
| CN204170591U (en) * | 2014-10-16 | 2015-02-25 | 河北京鹏环保科技有限公司 | Perforated trays spray column |
| CN205127642U (en) * | 2015-11-12 | 2016-04-06 | 曲靖市万佳有限责任公司 | Dust removal purification system of lime production line |
| CN205435343U (en) * | 2016-03-16 | 2016-08-10 | 济宁恒翼环保科技有限责任公司 | Industrial fumes exhaust -gas treatment purifier |
-
2017
- 2017-11-01 CN CN201711059977.0A patent/CN107965676B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110112133A (en) * | 2010-04-06 | 2011-10-12 | Kc코트렐 주식회사 | Absorption tower having multi-absorption chamber |
| CN202327650U (en) * | 2011-11-23 | 2012-07-11 | 四川立泰电子有限公司 | Emergency spray device for liquid ammonia leakage |
| WO2014197005A1 (en) * | 2013-06-04 | 2014-12-11 | Southern Company | Systems and methods for sequestering co2 |
| CN204170591U (en) * | 2014-10-16 | 2015-02-25 | 河北京鹏环保科技有限公司 | Perforated trays spray column |
| CN205127642U (en) * | 2015-11-12 | 2016-04-06 | 曲靖市万佳有限责任公司 | Dust removal purification system of lime production line |
| CN205435343U (en) * | 2016-03-16 | 2016-08-10 | 济宁恒翼环保科技有限责任公司 | Industrial fumes exhaust -gas treatment purifier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174100A (en) * | 2019-12-30 | 2020-05-19 | 清华大学 | Hydrogen leakage safety protection device |
| CN114110432A (en) * | 2021-11-15 | 2022-03-01 | 濮阳泓天威药业有限公司 | Liquid ammonia leakage pipeline control device |
| WO2023103719A1 (en) * | 2021-12-09 | 2023-06-15 | 深圳能源环保股份有限公司 | Ammonia water storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107965676B (en) | 2019-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107965676A (en) | A kind of processing system for liquefied ammonia leakage | |
| CN107041355A (en) | A kind of elastic intracavity plant protection unmanned plane anti-oscillating medicine-chest | |
| CN106442875B (en) | A kind of dangerous chemical leakage disposition experimental simulation system and method | |
| CN108969950A (en) | A kind of sea floating heap containment high pressure water spraying fire fighting system | |
| CN201899969U (en) | Full-automatic leaked chlorine absorption device | |
| CN104064238B (en) | Underground nuclear power station airborne radioactivity effluent passive washing filtering system | |
| CN215463077U (en) | Medical novel molecular sieve oxygen generation system for alpine environment | |
| CN102879153B (en) | Special experimental detection device for spray guns | |
| CN208465027U (en) | A kind of substation's fire-preventing monitor | |
| CN207356450U (en) | Multi-faceted fire-fighting fire extinguishing ball | |
| CN208244441U (en) | A kind of PVC production line tail gas absorber | |
| CN110454676A (en) | A kind of jacket type liquid chlorine gas cylinder | |
| CN204815471U (en) | Ammonia leaks emergent fire engine of dealing with | |
| CN203882119U (en) | Dangerous chemical substance leakage prevention self-control system | |
| CN102580502A (en) | Automatic chlorine leakage absorption emergency sterilizing device | |
| CN206901064U (en) | A kind of hazardous chemical storage tank processing unit | |
| CN205191052U (en) | Safety guard for pipeline | |
| CN208756595U (en) | Sterilizer sealing structure | |
| CN208552572U (en) | A kind of multi-functional hydrogen peroxide generator | |
| CN207152913U (en) | A kind of vertical bottle group extinguishing device of car | |
| CN208611377U (en) | Disinfection cabinet | |
| CN107185377A (en) | With spray and waste gas absorption integrated system in a kind of propellant | |
| CN107899363A (en) | A kind of method of water spray absorption emergency disposal liquid ammonia storage tank leakage ammonia | |
| CN206026930U (en) | Dry powder, dual -purpose fire extinguishing systems of foam | |
| CN207755953U (en) | A kind of ammonia leakage fire-fighting retracting device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |