CN107469575A - A kind of deammoniation tower suitable for MVR evaporator indirect steams - Google Patents
A kind of deammoniation tower suitable for MVR evaporator indirect steams Download PDFInfo
- Publication number
- CN107469575A CN107469575A CN201710780775.9A CN201710780775A CN107469575A CN 107469575 A CN107469575 A CN 107469575A CN 201710780775 A CN201710780775 A CN 201710780775A CN 107469575 A CN107469575 A CN 107469575A
- Authority
- CN
- China
- Prior art keywords
- deammoniation tower
- tower body
- deammoniation
- outlet
- acid
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000002253 acid Substances 0.000 claims abstract description 24
- 230000008676 import Effects 0.000 claims abstract description 18
- 230000005501 phase interface Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005201 scrubbing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000003181 biological factor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- 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
- B01D53/1406—Multiple stage absorption
-
- 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
- B01D53/1412—Controlling the absorption process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a kind of deammoniation tower suitable for MVR evaporator indirect steams, including deammoniation tower body, rake distributor and acid circulating pump, rake distributor is located inside deammoniation tower and is connected with air inlet, distributor trunk and branch's bottom even passage, acid circulating pump is located on the ground beside deammoniation tower, the deammoniation tower body bottom portion is provided with acid and exported, middle and lower part is provided with air inlet, liquid level gauge liquid phase interface and the sour mouth of benefit, middle part is provided with recycle acid import, online pH meter, hand hole and absorbing liquid outlet, middle and upper part is provided with wire mesh demister, manhole and screen bath water inlet, top is provided with gas outlet and liquid level gauge gas phase interface.The present invention both ensure that gas scrubbing increase while reduce the internal structure that deammoniation tower body height simplifies deammoniation tower, and equipment investment is greatly reduced compared to packed absorber.
Description
Technical field
The present invention relates to a kind of deammoniation tower suitable for MVR evaporator indirect steams, belong to the technical field of environmental protection equipment.
Background technology
The processing of city refuse landfill factory and incineration leachate is always to fill factory and incineration plant design, operation and pipe
Unusual stubborn problem in reason.Percolate is mainly derived from precipitation and rubbish in itself interior aqueous.Because liquid is in flow process
Many of factor may have influence on the property of percolate, including physical factor, chemical factor and biological factor etc., so oozing
The property of filtrate changes in a sizable scope.In general, its pH value is between 4~9, COD 2000~
In the range of 62000mg/L, for BOD5 from 600~45000mg/L, ammonia-nitrogen content is usually 100~1000mg/L, and heavy metal is dense
The concentration of heavy metal is basically identical in degree and municipal wastewater.Percolated liquid in city refuse landfill is a kind of high concentration of complicated component
Organic wastewater, environment is directly discharged into if untreated, serious environmental pollution can be caused.For the purpose of environmental protection, to oozing
It is essential that filtrate, which carries out processing,.
Traditional percolate treating process is the handling process of " biochemistry+membrane filtration ", and this technique can produce the concentrate of high concentration
It is difficult to handle.And the processing mode of novel percolate " MVR evaporations+condensate liquid biochemical " because no concentrate produces and more ring
Protect, but the indirect steam of the ammonia containing high concentration can be produced in evaporation process, to ensure subsequent biochemical producing water water quality need up to standard
The part ammonia in indirect steam is removed by deamination apparatus.Traditional absorption tower uses packed absorber, the device interior
Structure is more complicated and tower body height is higher, easily occurs to block and frequently overhaul in actual motion, it is therefore desirable to Yi Zhongjie
The deammoniation tower that structure is simple and energy is anti-blocking.
The content of the invention
For existing technical problem, the present invention provides a kind of new deammoniation tower, its simple in construction, low cost and can root
Ammonia nitrogen unnecessary in steam is removed to the clearance of ammonia nitrogen according to biochemical system.
The technical scheme is that：
A kind of deammoniation tower suitable for MVR evaporator indirect steams, including deammoniation tower body, deammoniation tower body are divided into upper, middle and lower
Portion and ellipse head it is columnar structured, deammoniation tower body middle and lower part horizontal direction is provided with air inlet, rake distributor, liquid level gauge
Liquid phase interface and the sour mouth of benefit, wherein liquid level gauge liquid phase interface are located in tower below minimum liquid level, and rake distributor is located at deammoniation tower
Inside is connected with air inlet, and rake distributor trunk and branch bottom even are distributed passage, and deammoniation tower body bottom portion is to dividing into
There is sour outlet, deammoniation tower body middle part horizontal direction is provided with circulating absorption solution import, hand hole and absorbing liquid outlet,
Wherein circulating absorption solution import is connected with acid outlet through acid circulating pump；The absorbing liquid outlet is arranged on circulating absorption solution
On the pipeline of import and sour outlet；Circulating absorption solution import is connected with spray head one, and spray head one is placed in the rake
Distributor upper end；Absorbing liquid spray equipment is provided with the tower body of middle and upper part, tower body is externally provided with manhole；Deammoniation tower body upper part is set upwards
There is gas outlet, horizontal direction is provided with liquid level gauge gas phase interface.
Further, above-mentioned absorbing liquid spray equipment is wire mesh demister and spray head two in tower body；Spray head two is set
It is connected in the upper end of wire mesh demister and with the screen bath water inlet outside tower body.
Further, online pH meter is arranged on the pipeline of recycle acid import and sour outlet.
Further, above-mentioned circulating absorption solution import and screen bath water inlet are separately positioned on the hand hole and manhole
On.
Further, above-mentioned deammoniation tower body internal surface uses corrosion-inhibiting coating；Deammoniation tower body deammoniation tower outer surface is provided with
Heat-preserving equipment.
Advantages of the present invention compared with prior art：
1, there is provided rake distributor ensure that being uniformly distributed for gas at air inlet by the present invention；
2, the present invention sets wire mesh demister and screen bath shower nozzle on deammoniation tower top, effectively prevents the mist in gas
Entrainment, greatly reduces the corrosion of subsequent pipeline and equipment；
3, the present invention is provided with online pH meter, can accurately control the acid concentration of absorbing liquid so as to adjust going for ammonia in steam
Except rate；
4, circulating absorption solution import and screen bath water inlet are separately positioned on hand hole and manhole by the present invention, have both facilitated inspection
Repair and reduce the perforate of tower body；
5, deammoniation tower of the invention is provided with absorbing liquid spray equipment in deammoniation tower body, both ensure that gas scrubbing increase was same
When reduce deammoniation tower body height, greatly reduce equipment investment compared to packed absorber.
6, deammoniation tower of the invention can make ammonia-nitrogen content in indirect steam be reduced to 50~200mg/L.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fig. 1 A-A figures；
Wherein, 1- deammoniation towers body；The outlet of 2- acid；3- air inlets；4- rake distributors；5- circulating absorption solution imports；6- silk screens
Demister；7- screen bath water inlets；8- liquid level gauge liquid phase interfaces；9- liquid level gauge gas phase interfaces；10- gas outlets；11- absorbing liquids
Outlet；12；Online pH meter；13- mends sour mouth；14- acid circulating pumps；15- spray heads one；16- spray heads two.
Embodiment
It is further described below in conjunction with the accompanying drawings：
With reference to specific embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.
As shown in Fig. 1, deammoniation tower of the invention includes deammoniation tower body 1, and the bottom of deammoniation tower body 1 is provided with acid outlet 2,
Middle and lower part is provided with air inlet 3, rake distributor 4, liquid level gauge liquid phase interface 8 and mends sour mouth 13, and middle part is entered provided with circulating absorption solution
Mouth 5, absorbing liquid outlet 11 and online pH meter 12, middle and upper part are provided with wire mesh demister 6 and screen bath water inlet 7, and top is provided with
Liquid level gauge gas phase interface 9 and gas outlet 10, acid circulating pump 14 are located on the ground beside deammoniation tower.
Evaporation produces indirect steam and enters deammoniation tower body 1 from air inlet 3, after rake distributor 4 is uniformly distributed and certainly
The circulating absorption solution of upper and lower spray fully contacts, and is then discharged after wire mesh demister 6 removes entrainment through gas outlet 10,
Circulating absorption solution delivers to circulating absorption solution import 5, circulating absorption solution enters from after the outflow of acid outlet 2 after the pressurization of acid circulating pump 14
Mouth 5 sprays rake distributor 4 through spray head 1 and carries out cyclic absorption, and online pH meter 12 is installed on cyclic absorption liquid pipeline,
Absorbing liquid pH value to be recycled discharges circulating absorption solution part through absorbing liquid outlet 11 after being increased to setting value, while configures certain
The dilute sulfuric acid of concentration supplements from sour 13 pairs of circulating absorption solutions of mouth are mended, and discharge opeing passes through the He of liquid level gauge liquid phase interface 8 with when mending sour
Liquid level gauge gas phase interface 9 carrys out liquid level in control tower, and spray head 21 cleans water inlet 7 by wire mesh demister and uses evaporative condenser
Water interval carries out on-line cleaning to wire mesh demister 6, reduces the steam drop inside deammoniation tower.
Evaporation produces the indirect steam containing high concentration ammonia and enters deammoniation tower body from air inlet horizontal direction, through rake
Distributor is uniformly distributed fully to be contacted with the circulating absorption solution sprayed from top to bottom afterwards, through wire mesh demister after removal part ammonia
Discharged after removing entrainment by gas outlet, circulating absorption solution is flowed out from acid outlet, and circulation is delivered to after being pressurizeed by acid circulating pump
Absorbing liquid import carries out cyclic absorption, online pH meter is installed on cyclic absorption liquid pipeline, according to the removal of ammonia in indirect steam
After rate can flexibly control the pH value of absorption cycle liquid, absorbing liquid pH value to be recycled to be increased to setting value, absorbing liquid outlet is opened
Circulating absorption solution part is discharged in bypass, while the certain density dilute sulfuric acid configured is entered from sour mouth is mended to circulating absorption solution
Row supplement, when causing acid circulating pump to cavitate to prevent that liquid level is too low in tower when discharging circulating absorption solution and supplement dilute sulfuric acid in tower
Liquid level is too high to flood rake formula distributor, it is necessary to set double flange liquid level meters, passes through liquid level gauge liquid phase pressure and the difference of gaseous pressure
Value determines level value, ensures that liquid level changes in rational section, indirect steam can carry a large amount of acid solutions secretly after overpickling, acid
Sulfuric acid in liquid can produce corrosion to compressor below and reduce the compressor life-span, need to set wire mesh demister for this to two
The acid solution carried secretly in secondary steam is removed, and wire mesh demister can be blocked gradually in the process of running and increasing resistance makes secondary steaming
The pressure of vapour declines, to ensure that it is too many, it is necessary to clear by wire mesh demister that the indirect steam pressure of deammoniation tower discharge will not decline
Wash water import carries out on-line cleaning using suitable cleansing medium interval to wire mesh demister, ensures the penetrating of wire mesh demister
Property, reduce the steam drop inside deammoniation tower.
The deammoniation tower of the present invention is provided with absorbing liquid spray equipment and silk screen Despumation device in deammoniation tower body, both ensures
Gas scrubbing increase, while deammoniation tower body height is reduced, compared to packed absorber greatly reduce equipment investment.
Above-described embodiment is only used for illustrating the inventive concept of the present invention, rather than the restriction to rights protection of the present invention,
It is all that substantial change is carried out to the present invention using this design, protection scope of the present invention all should be fallen into.
Claims (5)
- A kind of 1. deammoniation tower suitable for MVR evaporator indirect steams, it is characterised in that including deammoniation tower body,The deammoniation tower body is divided into the columnar structured of upper, middle and lower portion and ellipse head,The deammoniation tower body middle and lower part horizontal direction is provided with air inlet, rake distributor, liquid level gauge liquid phase interface and mends sour mouth, Wherein liquid level gauge liquid phase interface is located in tower below minimum liquid level,The rake distributor is located inside deammoniation tower and is connected with air inlet, the rake distributor trunk and branch's bottom even It is distributed passage,The deammoniation tower body bottom portion to having sour outlet,Horizontal direction is provided with circulating absorption solution import, hand hole and absorbing liquid outlet in the middle part of described deammoniation tower body,Wherein described circulating absorption solution import is connected with acid outlet through acid circulating pump；The absorbing liquid outlet is arranged on described follow On the pipeline of the import of ring absorbing liquid and sour outlet；The circulating absorption solution import is connected with spray head one, and the spray head one is placed in the rake distributor upper end；Absorbing liquid spray equipment is provided with the middle and upper part tower body, tower body is externally provided with manhole；The deammoniation tower body upper part is provided with gas outlet upwards, and horizontal direction is provided with liquid level gauge gas phase interface.
- 2. deammoniation tower as claimed in claim 1, it is characterised in that the absorbing liquid spray equipment is wire mesh demister in tower body With spray two；The spray two is arranged at the upper end of wire mesh demister and is connected with the screen bath water inlet outside tower body.
- 3. deammoniation tower as claimed in claim 1 or 2, it is characterised in that online pH meter is arranged on the recycle acid import and acid On the pipeline of outlet.
- 4. deammoniation tower as claimed in claim 1 or 2, it is characterised in that the circulating absorption solution import and screen bath water enter Mouth is separately positioned on the hand hole and manhole.
- 5. deammoniation tower as claimed in claim 1 or 2, it is characterised in that the deammoniation tower body internal surface is applied using anti-corrosion Layer；The deammoniation tower body deammoniation tower outer surface is provided with heat-preserving equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710780775.9A CN107469575A (en) | 2017-09-01 | 2017-09-01 | A kind of deammoniation tower suitable for MVR evaporator indirect steams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710780775.9A CN107469575A (en) | 2017-09-01 | 2017-09-01 | A kind of deammoniation tower suitable for MVR evaporator indirect steams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107469575A true CN107469575A (en) | 2017-12-15 |
Family
ID=60604353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710780775.9A Pending CN107469575A (en) | 2017-09-01 | 2017-09-01 | A kind of deammoniation tower suitable for MVR evaporator indirect steams |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107469575A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392947A (en) * | 2020-04-13 | 2020-07-10 | 湖北泰盛化工有限公司 | Ammonia water resource utilization process and device |
| CN112546813A (en) * | 2020-12-21 | 2021-03-26 | 大连广泰源环保科技有限公司 | Multi-flow type acid washing gas device and application thereof |
| CN113120870A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | High-performance insoluble sulfur production system and method |
Citations (3)
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|---|---|---|---|---|
| CN105983322A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying equipment for neutralization reaction |
| CN105983318A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Acid addition level regulating device for neutralization reaction tower |
| CN207307550U (en) * | 2017-09-01 | 2018-05-04 | 湖北合加环境设备有限公司 | A kind of deammoniation tower suitable for MVR evaporator indirect steams |
-
2017
- 2017-09-01 CN CN201710780775.9A patent/CN107469575A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105983322A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying equipment for neutralization reaction |
| CN105983318A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Acid addition level regulating device for neutralization reaction tower |
| CN207307550U (en) * | 2017-09-01 | 2018-05-04 | 湖北合加环境设备有限公司 | A kind of deammoniation tower suitable for MVR evaporator indirect steams |
Non-Patent Citations (1)
| Title |
|---|
| 赵旭德等: "《中小企业环保设备运行管理手册》", 华东理工大学出版社, pages: 410 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113120870A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | High-performance insoluble sulfur production system and method |
| CN113120870B (en) * | 2019-12-31 | 2024-02-02 | 中国石油化工股份有限公司 | High-performance insoluble sulfur production system and method |
| CN111392947A (en) * | 2020-04-13 | 2020-07-10 | 湖北泰盛化工有限公司 | Ammonia water resource utilization process and device |
| CN112546813A (en) * | 2020-12-21 | 2021-03-26 | 大连广泰源环保科技有限公司 | Multi-flow type acid washing gas device and application thereof |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 437100 238 Jin Gui Road, Xianning Economic Development Zone, Xianning, Hubei Applicant after: EGUARD NEW ENERGY AUTOMOBILE Co.,Ltd. Address before: 437100 238 Jin Gui Road, Xianning Economic Development Zone, Xianning, Hubei Applicant before: HUBEI EGUARD ENVIRONMENT EQUIPMENT Co.,Ltd. |
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Application publication date: 20171215 |
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| WD01 | Invention patent application deemed withdrawn after publication |